xref: /freebsd/libexec/ftpd/ftpd.c (revision 9ec7612a2f245db993be487337b1bd814ff443c1)
1ea022d16SRodney W. Grimes /*
2ea022d16SRodney W. Grimes  * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
3ea022d16SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
4ea022d16SRodney W. Grimes  *
5ea022d16SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
6ea022d16SRodney W. Grimes  * modification, are permitted provided that the following conditions
7ea022d16SRodney W. Grimes  * are met:
8ea022d16SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
9ea022d16SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
10ea022d16SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
11ea022d16SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
12ea022d16SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
13ea022d16SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
14ea022d16SRodney W. Grimes  *    must display the following acknowledgement:
15ea022d16SRodney W. Grimes  *	This product includes software developed by the University of
16ea022d16SRodney W. Grimes  *	California, Berkeley and its contributors.
17ea022d16SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
18ea022d16SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
19ea022d16SRodney W. Grimes  *    without specific prior written permission.
20ea022d16SRodney W. Grimes  *
21ea022d16SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22ea022d16SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23ea022d16SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24ea022d16SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25ea022d16SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26ea022d16SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27ea022d16SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28ea022d16SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29ea022d16SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30ea022d16SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31ea022d16SRodney W. Grimes  * SUCH DAMAGE.
32ea022d16SRodney W. Grimes  */
33ea022d16SRodney W. Grimes 
349aca17cbSMark Murray #if 0
35ea022d16SRodney W. Grimes #ifndef lint
36ea022d16SRodney W. Grimes static char copyright[] =
37ea022d16SRodney W. Grimes "@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\
38ea022d16SRodney W. Grimes 	The Regents of the University of California.  All rights reserved.\n";
39ea022d16SRodney W. Grimes #endif /* not lint */
409aca17cbSMark Murray #endif
41ea022d16SRodney W. Grimes 
42ea022d16SRodney W. Grimes #ifndef lint
43e02897faSPhilippe Charnier #if 0
44ea022d16SRodney W. Grimes static char sccsid[] = "@(#)ftpd.c	8.4 (Berkeley) 4/16/94";
459aca17cbSMark Murray #endif
46e02897faSPhilippe Charnier static const char rcsid[] =
477f3dea24SPeter Wemm   "$FreeBSD$";
48e02897faSPhilippe Charnier #endif /* not lint */
49ea022d16SRodney W. Grimes 
50ea022d16SRodney W. Grimes /*
51ea022d16SRodney W. Grimes  * FTP server.
52ea022d16SRodney W. Grimes  */
53ea022d16SRodney W. Grimes #include <sys/param.h>
54ea022d16SRodney W. Grimes #include <sys/ioctl.h>
559fc5823aSGarrett Wollman #include <sys/mman.h>
56eb2fc780SGarrett Wollman #include <sys/socket.h>
57eb2fc780SGarrett Wollman #include <sys/stat.h>
58eb2fc780SGarrett Wollman #include <sys/time.h>
59eb2fc780SGarrett Wollman #include <sys/wait.h>
60ea022d16SRodney W. Grimes 
61ea022d16SRodney W. Grimes #include <netinet/in.h>
62ea022d16SRodney W. Grimes #include <netinet/in_systm.h>
63ea022d16SRodney W. Grimes #include <netinet/ip.h>
649fc5823aSGarrett Wollman #include <netinet/tcp.h>
65ea022d16SRodney W. Grimes 
66ea022d16SRodney W. Grimes #define	FTP_NAMES
67ea022d16SRodney W. Grimes #include <arpa/ftp.h>
68ea022d16SRodney W. Grimes #include <arpa/inet.h>
69ea022d16SRodney W. Grimes #include <arpa/telnet.h>
70ea022d16SRodney W. Grimes 
71ea022d16SRodney W. Grimes #include <ctype.h>
72ea022d16SRodney W. Grimes #include <dirent.h>
73ea022d16SRodney W. Grimes #include <err.h>
74ea022d16SRodney W. Grimes #include <errno.h>
75ea022d16SRodney W. Grimes #include <fcntl.h>
76ea022d16SRodney W. Grimes #include <glob.h>
77ea022d16SRodney W. Grimes #include <limits.h>
78ea022d16SRodney W. Grimes #include <netdb.h>
79ea022d16SRodney W. Grimes #include <pwd.h>
8031fea7b8SDavid Nugent #include <grp.h>
8147499ecdSAndrey A. Chernov #include <opie.h>
82ea022d16SRodney W. Grimes #include <signal.h>
83ea022d16SRodney W. Grimes #include <stdio.h>
84ea022d16SRodney W. Grimes #include <stdlib.h>
85ea022d16SRodney W. Grimes #include <string.h>
86ea022d16SRodney W. Grimes #include <syslog.h>
87ea022d16SRodney W. Grimes #include <time.h>
88ea022d16SRodney W. Grimes #include <unistd.h>
89b63e1fe2SPeter Wemm #include <libutil.h>
90b071c689SDavid Nugent #ifdef	LOGIN_CAP
91b071c689SDavid Nugent #include <login_cap.h>
92b071c689SDavid Nugent #endif
93ea022d16SRodney W. Grimes 
945bc9d93dSMark Murray #ifdef USE_PAM
956c9134c0SMark Murray #include <security/pam_appl.h>
966c9134c0SMark Murray #endif
976c9134c0SMark Murray 
98ea022d16SRodney W. Grimes #include "pathnames.h"
99ea022d16SRodney W. Grimes #include "extern.h"
100ea022d16SRodney W. Grimes 
101ea022d16SRodney W. Grimes #include <stdarg.h>
102ea022d16SRodney W. Grimes 
103af85d782SDavid Nugent static char version[] = "Version 6.00LS";
104af85d782SDavid Nugent #undef main
105ea022d16SRodney W. Grimes 
106ea022d16SRodney W. Grimes extern	off_t restart_point;
107ea022d16SRodney W. Grimes extern	char cbuf[];
108ea022d16SRodney W. Grimes 
1094dd8b5abSYoshinobu Inoue union sockunion ctrl_addr;
1104dd8b5abSYoshinobu Inoue union sockunion data_source;
1114dd8b5abSYoshinobu Inoue union sockunion data_dest;
1124dd8b5abSYoshinobu Inoue union sockunion his_addr;
1134dd8b5abSYoshinobu Inoue union sockunion pasv_addr;
114ea022d16SRodney W. Grimes 
115cf09a206SDavid Greenman int	daemon_mode;
116ea022d16SRodney W. Grimes int	data;
11763591ba5SYaroslav Tykhiy int	dataport;
118c152df28SYaroslav Tykhiy int	hostinfo = 1;	/* print host-specific info in messages */
119ea022d16SRodney W. Grimes int	logged_in;
120ea022d16SRodney W. Grimes struct	passwd *pw;
121ce9287fcSYaroslav Tykhiy char	*homedir;
122618b0bbaSMark Murray int	ftpdebug;
123ea022d16SRodney W. Grimes int	timeout = 900;    /* timeout after 15 minutes of inactivity */
124ea022d16SRodney W. Grimes int	maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
125ea022d16SRodney W. Grimes int	logging;
1264c450ad7SPaul Traina int	restricted_data_ports = 1;
127a5a4544eSPaul Traina int	paranoid = 1;	  /* be extra careful about security */
1285a392aecSTorsten Blum int	anon_only = 0;    /* Only anonymous ftp allowed */
129ea022d16SRodney W. Grimes int	guest;
130a5a4544eSPaul Traina int	dochroot;
1315d7e0128SYaroslav Tykhiy int	dowtmp = 1;
1323eb568f2SGuido van Rooij int	stats;
1333eb568f2SGuido van Rooij int	statfd = -1;
134ea022d16SRodney W. Grimes int	type;
135ea022d16SRodney W. Grimes int	form;
136ea022d16SRodney W. Grimes int	stru;			/* avoid C keyword */
137ea022d16SRodney W. Grimes int	mode;
138ea022d16SRodney W. Grimes int	usedefault = 1;		/* for data transfers */
139ea022d16SRodney W. Grimes int	pdata = -1;		/* for passive mode */
140a4b77a2aSPoul-Henning Kamp int	readonly=0;		/* Server is in readonly mode.	*/
141a4b77a2aSPoul-Henning Kamp int	noepsv=0;		/* EPSV command is disabled.	*/
14262513e76SNik Clayton int	noretr=0;		/* RETR command is disabled.	*/
1431cc9f0bbSSheldon Hearn int	noguestretr=0;		/* RETR command is disabled for anon users. */
144d186bb12SMatthew N. Dodd int	noguestmkd=0;		/* MKD command is disabled for anon users. */
145a117c345SYaroslav Tykhiy int	noguestmod=1;		/* anon users may not modify existing files. */
14662513e76SNik Clayton 
1474b82fc95SYaroslav Tykhiy static volatile sig_atomic_t recvurg;
148ea022d16SRodney W. Grimes sig_atomic_t transflag;
149ea022d16SRodney W. Grimes off_t	file_size;
150ea022d16SRodney W. Grimes off_t	byte_count;
151ea022d16SRodney W. Grimes #if !defined(CMASK) || CMASK == 0
152ea022d16SRodney W. Grimes #undef CMASK
153ea022d16SRodney W. Grimes #define CMASK 027
154ea022d16SRodney W. Grimes #endif
155ea022d16SRodney W. Grimes int	defumask = CMASK;		/* default umask value */
156ea022d16SRodney W. Grimes char	tmpline[7];
157ea4e54b9SDavid Nugent char	*hostname;
158ad442344SDima Dorfman int	epsvall = 0;
159ad442344SDima Dorfman 
1600512556aSDavid Nugent #ifdef VIRTUAL_HOSTING
161ea4e54b9SDavid Nugent char	*ftpuser;
162ea4e54b9SDavid Nugent 
163ea4e54b9SDavid Nugent static struct ftphost {
164ea4e54b9SDavid Nugent 	struct ftphost	*next;
165f38c6cadSYoshinobu Inoue 	struct addrinfo *hostinfo;
166ea4e54b9SDavid Nugent 	char		*hostname;
167ea4e54b9SDavid Nugent 	char		*anonuser;
168ea4e54b9SDavid Nugent 	char		*statfile;
169ea4e54b9SDavid Nugent 	char		*welcome;
170ea4e54b9SDavid Nugent 	char		*loginmsg;
171ea4e54b9SDavid Nugent } *thishost, *firsthost;
172ea4e54b9SDavid Nugent 
173ea4e54b9SDavid Nugent #endif
1749e9a43bdSBrian Somers char	remotehost[MAXHOSTNAMELEN];
1753eb568f2SGuido van Rooij char	*ident = NULL;
176a5a4544eSPaul Traina 
177a5a4544eSPaul Traina static char ttyline[20];
178a5a4544eSPaul Traina char	*tty = ttyline;		/* for klogin */
179a5a4544eSPaul Traina 
1805bc9d93dSMark Murray #ifdef USE_PAM
181e4bc453cSWarner Losh static int	auth_pam(struct passwd**, const char*);
1825bc9d93dSMark Murray pam_handle_t *pamh = NULL;
18347499ecdSAndrey A. Chernov #endif
184fa1746c9SMark Murray 
185fa1746c9SMark Murray static struct opie opiedata;
186fa1746c9SMark Murray static char opieprompt[OPIE_CHALLENGE_MAX+1];
18747499ecdSAndrey A. Chernov static int pwok;
1889aca17cbSMark Murray 
189105a3c98SJulian Elischer char	*pid_file = NULL;
190105a3c98SJulian Elischer 
191ea022d16SRodney W. Grimes /*
1926d10cb2fSJonathan Lemon  * Limit number of pathnames that glob can return.
1936d10cb2fSJonathan Lemon  * A limit of 0 indicates the number of pathnames is unlimited.
1946d10cb2fSJonathan Lemon  */
1956d10cb2fSJonathan Lemon #define MAXGLOBARGS	16384
1966d10cb2fSJonathan Lemon #
1976d10cb2fSJonathan Lemon 
1986d10cb2fSJonathan Lemon /*
199ea022d16SRodney W. Grimes  * Timeout intervals for retrying connections
200ea022d16SRodney W. Grimes  * to hosts that don't accept PORT cmds.  This
201ea022d16SRodney W. Grimes  * is a kludge, but given the problems with TCP...
202ea022d16SRodney W. Grimes  */
203ea022d16SRodney W. Grimes #define	SWAITMAX	90	/* wait at most 90 seconds */
204ea022d16SRodney W. Grimes #define	SWAITINT	5	/* interval between retries */
205ea022d16SRodney W. Grimes 
206ea022d16SRodney W. Grimes int	swaitmax = SWAITMAX;
207ea022d16SRodney W. Grimes int	swaitint = SWAITINT;
208ea022d16SRodney W. Grimes 
209ea022d16SRodney W. Grimes #ifdef SETPROCTITLE
210b63e1fe2SPeter Wemm #ifdef OLD_SETPROCTITLE
211ea022d16SRodney W. Grimes char	**Argv = NULL;		/* pointer to argument vector */
212ea022d16SRodney W. Grimes char	*LastArgv = NULL;	/* end of argv */
213b63e1fe2SPeter Wemm #endif /* OLD_SETPROCTITLE */
214ea022d16SRodney W. Grimes char	proctitle[LINE_MAX];	/* initial part of title */
215ea022d16SRodney W. Grimes #endif /* SETPROCTITLE */
216ea022d16SRodney W. Grimes 
217ea022d16SRodney W. Grimes #define LOGCMD(cmd, file) \
218ea022d16SRodney W. Grimes 	if (logging > 1) \
219ea022d16SRodney W. Grimes 	    syslog(LOG_INFO,"%s %s%s", cmd, \
220ea022d16SRodney W. Grimes 		*(file) == '/' ? "" : curdir(), file);
221ea022d16SRodney W. Grimes #define LOGCMD2(cmd, file1, file2) \
222ea022d16SRodney W. Grimes 	 if (logging > 1) \
223ea022d16SRodney W. Grimes 	    syslog(LOG_INFO,"%s %s%s %s%s", cmd, \
224ea022d16SRodney W. Grimes 		*(file1) == '/' ? "" : curdir(), file1, \
225ea022d16SRodney W. Grimes 		*(file2) == '/' ? "" : curdir(), file2);
226ea022d16SRodney W. Grimes #define LOGBYTES(cmd, file, cnt) \
227ea022d16SRodney W. Grimes 	if (logging > 1) { \
228ea022d16SRodney W. Grimes 		if (cnt == (off_t)-1) \
229ea022d16SRodney W. Grimes 		    syslog(LOG_INFO,"%s %s%s", cmd, \
230ea022d16SRodney W. Grimes 			*(file) == '/' ? "" : curdir(), file); \
231ea022d16SRodney W. Grimes 		else \
232ea022d16SRodney W. Grimes 		    syslog(LOG_INFO, "%s %s%s = %qd bytes", \
233ea022d16SRodney W. Grimes 			cmd, (*(file) == '/') ? "" : curdir(), file, cnt); \
234ea022d16SRodney W. Grimes 	}
235ea022d16SRodney W. Grimes 
236ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
237e4bc453cSWarner Losh static void	 inithosts(void);
238e4bc453cSWarner Losh static void	selecthost(union sockunion *);
239ea4e54b9SDavid Nugent #endif
240e4bc453cSWarner Losh static void	 ack(char *);
241e4bc453cSWarner Losh static void	 sigurg(int);
242e4bc453cSWarner Losh static void	 myoob(void);
2438657b576SYaroslav Tykhiy static int	 checkuser(char *, char *, int, char **);
244e4bc453cSWarner Losh static FILE	*dataconn(char *, off_t, char *);
245e4bc453cSWarner Losh static void	 dolog(struct sockaddr *);
246e4bc453cSWarner Losh static char	*curdir(void);
247e4bc453cSWarner Losh static void	 end_login(void);
248e4bc453cSWarner Losh static FILE	*getdatasock(char *);
249a117c345SYaroslav Tykhiy static int	 guniquefd(char *, char **);
250e4bc453cSWarner Losh static void	 lostconn(int);
251e4bc453cSWarner Losh static void	 sigquit(int);
252e4bc453cSWarner Losh static int	 receive_data(FILE *, FILE *);
253e4bc453cSWarner Losh static int	 send_data(FILE *, FILE *, off_t, off_t, int);
254ea022d16SRodney W. Grimes static struct passwd *
255e4bc453cSWarner Losh 		 sgetpwnam(char *);
256e4bc453cSWarner Losh static char	*sgetsave(char *);
257e4bc453cSWarner Losh static void	 reapchild(int);
258e4bc453cSWarner Losh static void      logxfer(char *, off_t, time_t);
259e4648f05SYaroslav Tykhiy static char	*doublequote(char *);
260206fe568SHajimu UMEMOTO static int	*socksetup(int, char *, const char *);
261ea022d16SRodney W. Grimes 
262ea022d16SRodney W. Grimes static char *
263e4bc453cSWarner Losh curdir(void)
264ea022d16SRodney W. Grimes {
265ea022d16SRodney W. Grimes 	static char path[MAXPATHLEN+1+1];	/* path + '/' + '\0' */
266ea022d16SRodney W. Grimes 
267ea022d16SRodney W. Grimes 	if (getcwd(path, sizeof(path)-2) == NULL)
268ea022d16SRodney W. Grimes 		return ("");
269ea022d16SRodney W. Grimes 	if (path[1] != '\0')		/* special case for root dir. */
270ea022d16SRodney W. Grimes 		strcat(path, "/");
271ea022d16SRodney W. Grimes 	/* For guest account, skip / since it's chrooted */
272ea022d16SRodney W. Grimes 	return (guest ? path+1 : path);
273ea022d16SRodney W. Grimes }
274ea022d16SRodney W. Grimes 
275ea022d16SRodney W. Grimes int
276e4bc453cSWarner Losh main(int argc, char *argv[], char **envp)
277ea022d16SRodney W. Grimes {
278ea022d16SRodney W. Grimes 	int addrlen, ch, on = 1, tos;
279ea022d16SRodney W. Grimes 	char *cp, line[LINE_MAX];
280ea022d16SRodney W. Grimes 	FILE *fd;
2814dd8b5abSYoshinobu Inoue 	int error;
2824dd8b5abSYoshinobu Inoue 	char	*bindname = NULL;
28363591ba5SYaroslav Tykhiy 	const char *bindport = "ftp";
2844dd8b5abSYoshinobu Inoue 	int	family = AF_UNSPEC;
2854b82fc95SYaroslav Tykhiy 	struct sigaction sa;
286ea022d16SRodney W. Grimes 
28734d1ba5cSAndrey A. Chernov 	tzset();		/* in case no timezone database in ~ftp */
2884b82fc95SYaroslav Tykhiy 	sigemptyset(&sa.sa_mask);
2894b82fc95SYaroslav Tykhiy 	sa.sa_flags = SA_RESTART;
29034d1ba5cSAndrey A. Chernov 
291b63e1fe2SPeter Wemm #ifdef OLD_SETPROCTITLE
292ea022d16SRodney W. Grimes 	/*
293ea022d16SRodney W. Grimes 	 *  Save start and extent of argv for setproctitle.
294ea022d16SRodney W. Grimes 	 */
295ea022d16SRodney W. Grimes 	Argv = argv;
296ea022d16SRodney W. Grimes 	while (*envp)
297ea022d16SRodney W. Grimes 		envp++;
298ea022d16SRodney W. Grimes 	LastArgv = envp[-1] + strlen(envp[-1]);
299b63e1fe2SPeter Wemm #endif /* OLD_SETPROCTITLE */
300ea022d16SRodney W. Grimes 
3013eb568f2SGuido van Rooij 
302c152df28SYaroslav Tykhiy 	while ((ch = getopt(argc, argv,
303c152df28SYaroslav Tykhiy 	                    "46a:AdDEhlmMoOp:P:rRSt:T:u:UvW")) != -1) {
304ea022d16SRodney W. Grimes 		switch (ch) {
3050e063efeSYaroslav Tykhiy 		case '4':
306206fe568SHajimu UMEMOTO 			family = (family == AF_INET6) ? AF_UNSPEC : AF_INET;
3070e063efeSYaroslav Tykhiy 			break;
3080e063efeSYaroslav Tykhiy 
3090e063efeSYaroslav Tykhiy 		case '6':
310206fe568SHajimu UMEMOTO 			family = (family == AF_INET) ? AF_UNSPEC : AF_INET6;
3110e063efeSYaroslav Tykhiy 			break;
3120e063efeSYaroslav Tykhiy 
3130e063efeSYaroslav Tykhiy 		case 'a':
3140e063efeSYaroslav Tykhiy 			bindname = optarg;
3150e063efeSYaroslav Tykhiy 			break;
3160e063efeSYaroslav Tykhiy 
3170e063efeSYaroslav Tykhiy 		case 'A':
3180e063efeSYaroslav Tykhiy 			anon_only = 1;
319cf09a206SDavid Greenman 			break;
320cf09a206SDavid Greenman 
321ea022d16SRodney W. Grimes 		case 'd':
322618b0bbaSMark Murray 			ftpdebug++;
323ea022d16SRodney W. Grimes 			break;
324ea022d16SRodney W. Grimes 
3250e063efeSYaroslav Tykhiy 		case 'D':
3260e063efeSYaroslav Tykhiy 			daemon_mode++;
3270e063efeSYaroslav Tykhiy 			break;
3280e063efeSYaroslav Tykhiy 
329a4b77a2aSPoul-Henning Kamp 		case 'E':
330a4b77a2aSPoul-Henning Kamp 			noepsv = 1;
331a4b77a2aSPoul-Henning Kamp 			break;
332a4b77a2aSPoul-Henning Kamp 
333c152df28SYaroslav Tykhiy 		case 'h':
334c152df28SYaroslav Tykhiy 			hostinfo = 0;
335c152df28SYaroslav Tykhiy 			break;
336c152df28SYaroslav Tykhiy 
337ea022d16SRodney W. Grimes 		case 'l':
338ea022d16SRodney W. Grimes 			logging++;	/* > 1 == extra logging */
339ea022d16SRodney W. Grimes 			break;
340ea022d16SRodney W. Grimes 
341a117c345SYaroslav Tykhiy 		case 'm':
342a117c345SYaroslav Tykhiy 			noguestmod = 0;
343a117c345SYaroslav Tykhiy 			break;
344a117c345SYaroslav Tykhiy 
3450e063efeSYaroslav Tykhiy 		case 'M':
3460e063efeSYaroslav Tykhiy 			noguestmkd = 1;
3470e063efeSYaroslav Tykhiy 			break;
3480e063efeSYaroslav Tykhiy 
3490e063efeSYaroslav Tykhiy 		case 'o':
3500e063efeSYaroslav Tykhiy 			noretr = 1;
3510e063efeSYaroslav Tykhiy 			break;
3520e063efeSYaroslav Tykhiy 
3530e063efeSYaroslav Tykhiy 		case 'O':
3540e063efeSYaroslav Tykhiy 			noguestretr = 1;
3550e063efeSYaroslav Tykhiy 			break;
3560e063efeSYaroslav Tykhiy 
3570e063efeSYaroslav Tykhiy 		case 'p':
3580e063efeSYaroslav Tykhiy 			pid_file = optarg;
3590e063efeSYaroslav Tykhiy 			break;
3600e063efeSYaroslav Tykhiy 
36163591ba5SYaroslav Tykhiy 		case 'P':
36263591ba5SYaroslav Tykhiy 			bindport = optarg;
36363591ba5SYaroslav Tykhiy 			break;
36463591ba5SYaroslav Tykhiy 
365a4b77a2aSPoul-Henning Kamp 		case 'r':
366a4b77a2aSPoul-Henning Kamp 			readonly = 1;
367a4b77a2aSPoul-Henning Kamp 			break;
368a4b77a2aSPoul-Henning Kamp 
369a5a4544eSPaul Traina 		case 'R':
370a5a4544eSPaul Traina 			paranoid = 0;
371a5a4544eSPaul Traina 			break;
372a5a4544eSPaul Traina 
373a5a4544eSPaul Traina 		case 'S':
374a5a4544eSPaul Traina 			stats++;
375a5a4544eSPaul Traina 			break;
376a5a4544eSPaul Traina 
377ea022d16SRodney W. Grimes 		case 't':
378ea022d16SRodney W. Grimes 			timeout = atoi(optarg);
379ea022d16SRodney W. Grimes 			if (maxtimeout < timeout)
380ea022d16SRodney W. Grimes 				maxtimeout = timeout;
381ea022d16SRodney W. Grimes 			break;
382a5a4544eSPaul Traina 
3830e063efeSYaroslav Tykhiy 		case 'T':
3840e063efeSYaroslav Tykhiy 			maxtimeout = atoi(optarg);
3850e063efeSYaroslav Tykhiy 			if (timeout > maxtimeout)
3860e063efeSYaroslav Tykhiy 				timeout = maxtimeout;
387105a3c98SJulian Elischer 			break;
388105a3c98SJulian Elischer 
389ea022d16SRodney W. Grimes 		case 'u':
390ea022d16SRodney W. Grimes 		    {
391ea022d16SRodney W. Grimes 			long val = 0;
392ea022d16SRodney W. Grimes 
393ea022d16SRodney W. Grimes 			val = strtol(optarg, &optarg, 8);
394ea022d16SRodney W. Grimes 			if (*optarg != '\0' || val < 0)
395ea022d16SRodney W. Grimes 				warnx("bad value for -u");
396ea022d16SRodney W. Grimes 			else
397ea022d16SRodney W. Grimes 				defumask = val;
398ea022d16SRodney W. Grimes 			break;
399ea022d16SRodney W. Grimes 		    }
4000e063efeSYaroslav Tykhiy 		case 'U':
4010e063efeSYaroslav Tykhiy 			restricted_data_ports = 0;
4025a392aecSTorsten Blum 			break;
403ea022d16SRodney W. Grimes 
404ea022d16SRodney W. Grimes 		case 'v':
40593bd9dc5SYaroslav Tykhiy 			ftpdebug++;
406ea022d16SRodney W. Grimes 			break;
407ea022d16SRodney W. Grimes 
4085d7e0128SYaroslav Tykhiy 		case 'W':
4095d7e0128SYaroslav Tykhiy 			dowtmp = 0;
4105d7e0128SYaroslav Tykhiy 			break;
4115d7e0128SYaroslav Tykhiy 
412ea022d16SRodney W. Grimes 		default:
413ea022d16SRodney W. Grimes 			warnx("unknown flag -%c ignored", optopt);
414ea022d16SRodney W. Grimes 			break;
415ea022d16SRodney W. Grimes 		}
416ea022d16SRodney W. Grimes 	}
417cf09a206SDavid Greenman 
418ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
419ea4e54b9SDavid Nugent 	inithosts();
420ea4e54b9SDavid Nugent #endif
421ea022d16SRodney W. Grimes 	(void) freopen(_PATH_DEVNULL, "w", stderr);
422cf09a206SDavid Greenman 
423cf09a206SDavid Greenman 	/*
424cf09a206SDavid Greenman 	 * LOG_NDELAY sets up the logging connection immediately,
425cf09a206SDavid Greenman 	 * necessary for anonymous ftp's that chroot and can't do it later.
426cf09a206SDavid Greenman 	 */
427cf09a206SDavid Greenman 	openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
428cf09a206SDavid Greenman 
429cf09a206SDavid Greenman 	if (daemon_mode) {
430206fe568SHajimu UMEMOTO 		int *ctl_sock, fd, maxfd = -1, nfds, i;
431206fe568SHajimu UMEMOTO 		fd_set defreadfds, readfds;
432206fe568SHajimu UMEMOTO 		pid_t pid;
433cf09a206SDavid Greenman 
434cf09a206SDavid Greenman 		/*
435cf09a206SDavid Greenman 		 * Detach from parent.
436cf09a206SDavid Greenman 		 */
437cf09a206SDavid Greenman 		if (daemon(1, 1) < 0) {
438cf09a206SDavid Greenman 			syslog(LOG_ERR, "failed to become a daemon");
439cf09a206SDavid Greenman 			exit(1);
440cf09a206SDavid Greenman 		}
4414b82fc95SYaroslav Tykhiy 		sa.sa_handler = reapchild;
4424b82fc95SYaroslav Tykhiy 		(void)sigaction(SIGCHLD, &sa, NULL);
4434dd8b5abSYoshinobu Inoue 
444cf09a206SDavid Greenman 		/*
445cf09a206SDavid Greenman 		 * Open a socket, bind it to the FTP port, and start
446cf09a206SDavid Greenman 		 * listening.
447cf09a206SDavid Greenman 		 */
448206fe568SHajimu UMEMOTO 		ctl_sock = socksetup(family, bindname, bindport);
449206fe568SHajimu UMEMOTO 		if (ctl_sock == NULL)
450cf09a206SDavid Greenman 			exit(1);
451206fe568SHajimu UMEMOTO 
452206fe568SHajimu UMEMOTO 		FD_ZERO(&defreadfds);
453206fe568SHajimu UMEMOTO 		for (i = 1; i <= *ctl_sock; i++) {
454206fe568SHajimu UMEMOTO 			FD_SET(ctl_sock[i], &defreadfds);
455206fe568SHajimu UMEMOTO 			if (listen(ctl_sock[i], 32) < 0) {
456cf09a206SDavid Greenman 				syslog(LOG_ERR, "control listen: %m");
457cf09a206SDavid Greenman 				exit(1);
458cf09a206SDavid Greenman 			}
459206fe568SHajimu UMEMOTO 			if (maxfd < ctl_sock[i])
460206fe568SHajimu UMEMOTO 				maxfd = ctl_sock[i];
461206fe568SHajimu UMEMOTO 		}
462206fe568SHajimu UMEMOTO 
463cf09a206SDavid Greenman 		/*
464105a3c98SJulian Elischer 		 * Atomically write process ID
465105a3c98SJulian Elischer 		 */
466105a3c98SJulian Elischer 		if (pid_file)
467105a3c98SJulian Elischer 		{
468105a3c98SJulian Elischer 			int fd;
469105a3c98SJulian Elischer 			char buf[20];
470105a3c98SJulian Elischer 
471105a3c98SJulian Elischer 			fd = open(pid_file, O_CREAT | O_WRONLY | O_TRUNC
472105a3c98SJulian Elischer 				| O_NONBLOCK | O_EXLOCK, 0644);
47385966371SWarner Losh 			if (fd < 0) {
474105a3c98SJulian Elischer 				if (errno == EAGAIN)
475105a3c98SJulian Elischer 					errx(1, "%s: file locked", pid_file);
476105a3c98SJulian Elischer 				else
477105a3c98SJulian Elischer 					err(1, "%s", pid_file);
47885966371SWarner Losh 			}
479105a3c98SJulian Elischer 			snprintf(buf, sizeof(buf),
480105a3c98SJulian Elischer 				"%lu\n", (unsigned long) getpid());
481105a3c98SJulian Elischer 			if (write(fd, buf, strlen(buf)) < 0)
482105a3c98SJulian Elischer 				err(1, "%s: write", pid_file);
483105a3c98SJulian Elischer 			/* Leave the pid file open and locked */
484105a3c98SJulian Elischer 		}
485105a3c98SJulian Elischer 		/*
486cf09a206SDavid Greenman 		 * Loop forever accepting connection requests and forking off
487cf09a206SDavid Greenman 		 * children to handle them.
488cf09a206SDavid Greenman 		 */
489cf09a206SDavid Greenman 		while (1) {
490206fe568SHajimu UMEMOTO 			FD_COPY(&defreadfds, &readfds);
491206fe568SHajimu UMEMOTO 			nfds = select(maxfd + 1, &readfds, NULL, NULL, 0);
492206fe568SHajimu UMEMOTO 			if (nfds <= 0) {
493206fe568SHajimu UMEMOTO 				if (nfds < 0 && errno != EINTR)
494206fe568SHajimu UMEMOTO 					syslog(LOG_WARNING, "select: %m");
495206fe568SHajimu UMEMOTO 				continue;
496206fe568SHajimu UMEMOTO 			}
497206fe568SHajimu UMEMOTO 
498206fe568SHajimu UMEMOTO 			pid = -1;
499206fe568SHajimu UMEMOTO                         for (i = 1; i <= *ctl_sock; i++)
500206fe568SHajimu UMEMOTO 				if (FD_ISSET(ctl_sock[i], &readfds)) {
501206fe568SHajimu UMEMOTO 					addrlen = sizeof(his_addr);
502206fe568SHajimu UMEMOTO 					fd = accept(ctl_sock[i],
503206fe568SHajimu UMEMOTO 					    (struct sockaddr *)&his_addr,
504206fe568SHajimu UMEMOTO 					    &addrlen);
505206fe568SHajimu UMEMOTO 					if ((pid = fork()) == 0) {
506cf09a206SDavid Greenman 						/* child */
507cf09a206SDavid Greenman 						(void) dup2(fd, 0);
508cf09a206SDavid Greenman 						(void) dup2(fd, 1);
509206fe568SHajimu UMEMOTO 						close(ctl_sock[i]);
510206fe568SHajimu UMEMOTO 					} else
511cf09a206SDavid Greenman 						close(fd);
512cf09a206SDavid Greenman 				}
513206fe568SHajimu UMEMOTO 			if (pid == 0)
514206fe568SHajimu UMEMOTO 				break;
515206fe568SHajimu UMEMOTO 		}
516cf09a206SDavid Greenman 	} else {
517cf09a206SDavid Greenman 		addrlen = sizeof(his_addr);
518cf09a206SDavid Greenman 		if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
519cf09a206SDavid Greenman 			syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
520cf09a206SDavid Greenman 			exit(1);
521cf09a206SDavid Greenman 		}
522cf09a206SDavid Greenman 	}
523cf09a206SDavid Greenman 
5244b82fc95SYaroslav Tykhiy 	sa.sa_handler = SIG_DFL;
5254b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGCHLD, &sa, NULL);
5264b82fc95SYaroslav Tykhiy 
5274b82fc95SYaroslav Tykhiy 	sa.sa_handler = sigurg;
5284b82fc95SYaroslav Tykhiy 	sa.sa_flags = 0;		/* don't restart syscalls for SIGURG */
5294b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGURG, &sa, NULL);
5304b82fc95SYaroslav Tykhiy 
5314b82fc95SYaroslav Tykhiy 	sigfillset(&sa.sa_mask);	/* block all signals in handler */
5324b82fc95SYaroslav Tykhiy 	sa.sa_flags = SA_RESTART;
5334b82fc95SYaroslav Tykhiy 	sa.sa_handler = sigquit;
5344b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGHUP, &sa, NULL);
5354b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGINT, &sa, NULL);
5364b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGQUIT, &sa, NULL);
5374b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGTERM, &sa, NULL);
5384b82fc95SYaroslav Tykhiy 
5394b82fc95SYaroslav Tykhiy 	sa.sa_handler = lostconn;
5404b82fc95SYaroslav Tykhiy 	(void)sigaction(SIGPIPE, &sa, NULL);
541ea022d16SRodney W. Grimes 
542cf09a206SDavid Greenman 	addrlen = sizeof(ctrl_addr);
543cf09a206SDavid Greenman 	if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
544cf09a206SDavid Greenman 		syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
545cf09a206SDavid Greenman 		exit(1);
546cf09a206SDavid Greenman 	}
54763591ba5SYaroslav Tykhiy 	dataport = ntohs(ctrl_addr.su_port) - 1; /* as per RFC 959 */
548ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
549ea4e54b9SDavid Nugent 	/* select our identity from virtual host table */
5504dd8b5abSYoshinobu Inoue 	selecthost(&ctrl_addr);
551ea4e54b9SDavid Nugent #endif
552cf09a206SDavid Greenman #ifdef IP_TOS
5534dd8b5abSYoshinobu Inoue 	if (ctrl_addr.su_family == AF_INET)
5544dd8b5abSYoshinobu Inoue       {
555cf09a206SDavid Greenman 	tos = IPTOS_LOWDELAY;
55657d4ef07SYaroslav Tykhiy 	if (setsockopt(0, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
557406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "control setsockopt (IP_TOS): %m");
5584dd8b5abSYoshinobu Inoue       }
559cf09a206SDavid Greenman #endif
560dadb9fb3SDavid Greenman 	/*
561dadb9fb3SDavid Greenman 	 * Disable Nagle on the control channel so that we don't have to wait
562dadb9fb3SDavid Greenman 	 * for peer's ACK before issuing our next reply.
563dadb9fb3SDavid Greenman 	 */
564dadb9fb3SDavid Greenman 	if (setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
565406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "control setsockopt (TCP_NODELAY): %m");
566dadb9fb3SDavid Greenman 
5674dd8b5abSYoshinobu Inoue 	data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1);
568cf09a206SDavid Greenman 
569a5a4544eSPaul Traina 	/* set this here so klogin can use it... */
570e760ef2cSWarner Losh 	(void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid());
571a5a4544eSPaul Traina 
572ea022d16SRodney W. Grimes 	/* Try to handle urgent data inline */
573ea022d16SRodney W. Grimes #ifdef SO_OOBINLINE
57457d4ef07SYaroslav Tykhiy 	if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, &on, sizeof(on)) < 0)
575406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "control setsockopt (SO_OOBINLINE): %m");
576ea022d16SRodney W. Grimes #endif
577ea022d16SRodney W. Grimes 
578ea022d16SRodney W. Grimes #ifdef	F_SETOWN
579ea022d16SRodney W. Grimes 	if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
580ea022d16SRodney W. Grimes 		syslog(LOG_ERR, "fcntl F_SETOWN: %m");
581ea022d16SRodney W. Grimes #endif
5824dd8b5abSYoshinobu Inoue 	dolog((struct sockaddr *)&his_addr);
583ea022d16SRodney W. Grimes 	/*
584ea022d16SRodney W. Grimes 	 * Set up default state
585ea022d16SRodney W. Grimes 	 */
586ea022d16SRodney W. Grimes 	data = -1;
587ea022d16SRodney W. Grimes 	type = TYPE_A;
588ea022d16SRodney W. Grimes 	form = FORM_N;
589ea022d16SRodney W. Grimes 	stru = STRU_F;
590ea022d16SRodney W. Grimes 	mode = MODE_S;
591ea022d16SRodney W. Grimes 	tmpline[0] = '\0';
592ea022d16SRodney W. Grimes 
593ea022d16SRodney W. Grimes 	/* If logins are disabled, print out the message. */
594ea022d16SRodney W. Grimes 	if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
595ea022d16SRodney W. Grimes 		while (fgets(line, sizeof(line), fd) != NULL) {
596ea022d16SRodney W. Grimes 			if ((cp = strchr(line, '\n')) != NULL)
597ea022d16SRodney W. Grimes 				*cp = '\0';
598ea022d16SRodney W. Grimes 			lreply(530, "%s", line);
599ea022d16SRodney W. Grimes 		}
600ea022d16SRodney W. Grimes 		(void) fflush(stdout);
601ea022d16SRodney W. Grimes 		(void) fclose(fd);
602ea022d16SRodney W. Grimes 		reply(530, "System not available.");
603ea022d16SRodney W. Grimes 		exit(0);
604ea022d16SRodney W. Grimes 	}
605ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
60663047c6fSDavid E. O'Brien 	fd = fopen(thishost->welcome, "r");
607ea4e54b9SDavid Nugent #else
60863047c6fSDavid E. O'Brien 	fd = fopen(_PATH_FTPWELCOME, "r");
609ea4e54b9SDavid Nugent #endif
61063047c6fSDavid E. O'Brien 	if (fd != NULL) {
611ea022d16SRodney W. Grimes 		while (fgets(line, sizeof(line), fd) != NULL) {
612ea022d16SRodney W. Grimes 			if ((cp = strchr(line, '\n')) != NULL)
613ea022d16SRodney W. Grimes 				*cp = '\0';
614ea022d16SRodney W. Grimes 			lreply(220, "%s", line);
615ea022d16SRodney W. Grimes 		}
616ea022d16SRodney W. Grimes 		(void) fflush(stdout);
617ea022d16SRodney W. Grimes 		(void) fclose(fd);
618ea022d16SRodney W. Grimes 		/* reply(220,) must follow */
619ea022d16SRodney W. Grimes 	}
620ea4e54b9SDavid Nugent #ifndef VIRTUAL_HOSTING
6210512556aSDavid Nugent 	if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
622618b0bbaSMark Murray 		fatalerror("Ran out of memory.");
6239e9a43bdSBrian Somers 	(void) gethostname(hostname, MAXHOSTNAMELEN - 1);
6249e9a43bdSBrian Somers 	hostname[MAXHOSTNAMELEN - 1] = '\0';
625ea4e54b9SDavid Nugent #endif
626c152df28SYaroslav Tykhiy 	if (hostinfo)
627ea022d16SRodney W. Grimes 		reply(220, "%s FTP server (%s) ready.", hostname, version);
628c152df28SYaroslav Tykhiy 	else
629c152df28SYaroslav Tykhiy 		reply(220, "FTP server ready.");
630ea022d16SRodney W. Grimes 	for (;;)
631ea022d16SRodney W. Grimes 		(void) yyparse();
632ea022d16SRodney W. Grimes 	/* NOTREACHED */
633ea022d16SRodney W. Grimes }
634ea022d16SRodney W. Grimes 
635ea022d16SRodney W. Grimes static void
636e4bc453cSWarner Losh lostconn(int signo)
637ea022d16SRodney W. Grimes {
638ea022d16SRodney W. Grimes 
639618b0bbaSMark Murray 	if (ftpdebug)
640ea022d16SRodney W. Grimes 		syslog(LOG_DEBUG, "lost connection");
641e02897faSPhilippe Charnier 	dologout(1);
642ea022d16SRodney W. Grimes }
643ea022d16SRodney W. Grimes 
6444b82fc95SYaroslav Tykhiy static void
645e4bc453cSWarner Losh sigquit(int signo)
6464b82fc95SYaroslav Tykhiy {
6474b82fc95SYaroslav Tykhiy 
6484b82fc95SYaroslav Tykhiy 	syslog(LOG_ERR, "got signal %d", signo);
6494b82fc95SYaroslav Tykhiy 	dologout(1);
6504b82fc95SYaroslav Tykhiy }
6514b82fc95SYaroslav Tykhiy 
652ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
653ea4e54b9SDavid Nugent /*
654ea4e54b9SDavid Nugent  * read in virtual host tables (if they exist)
655ea4e54b9SDavid Nugent  */
656ea4e54b9SDavid Nugent 
657ea4e54b9SDavid Nugent static void
658e4bc453cSWarner Losh inithosts(void)
659ea4e54b9SDavid Nugent {
66055b54aa7SYaroslav Tykhiy 	int insert;
661737d08f3SYaroslav Tykhiy 	size_t len;
662ea4e54b9SDavid Nugent 	FILE *fp;
663737d08f3SYaroslav Tykhiy 	char *cp, *mp, *line;
664737d08f3SYaroslav Tykhiy 	char *hostname;
66555b54aa7SYaroslav Tykhiy 	char *vhost, *anonuser, *statfile, *welcome, *loginmsg;
666ea4e54b9SDavid Nugent 	struct ftphost *hrp, *lhrp;
6674dd8b5abSYoshinobu Inoue 	struct addrinfo hints, *res, *ai;
668ea4e54b9SDavid Nugent 
669ea4e54b9SDavid Nugent 	/*
670ea4e54b9SDavid Nugent 	 * Fill in the default host information
671ea4e54b9SDavid Nugent 	 */
672737d08f3SYaroslav Tykhiy 	if ((hostname = malloc(MAXHOSTNAMELEN)) == NULL)
673618b0bbaSMark Murray 		fatalerror("Ran out of memory.");
674737d08f3SYaroslav Tykhiy 	if (gethostname(hostname, MAXHOSTNAMELEN) < 0)
675737d08f3SYaroslav Tykhiy 		hostname[0] = '\0';
676737d08f3SYaroslav Tykhiy 	hostname[MAXHOSTNAMELEN - 1] = '\0';
677737d08f3SYaroslav Tykhiy 	if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
678737d08f3SYaroslav Tykhiy 		fatalerror("Ran out of memory.");
679737d08f3SYaroslav Tykhiy 	hrp->hostname = hostname;
680f38c6cadSYoshinobu Inoue 	hrp->hostinfo = NULL;
6814dd8b5abSYoshinobu Inoue 
6824dd8b5abSYoshinobu Inoue 	memset(&hints, 0, sizeof(hints));
6834dd8b5abSYoshinobu Inoue 	hints.ai_flags = AI_CANONNAME;
6844dd8b5abSYoshinobu Inoue 	hints.ai_family = AF_UNSPEC;
685b1d8d5cdSYaroslav Tykhiy 	if (getaddrinfo(hrp->hostname, NULL, &hints, &res) == 0)
686f38c6cadSYoshinobu Inoue 		hrp->hostinfo = res;
687ea4e54b9SDavid Nugent 	hrp->statfile = _PATH_FTPDSTATFILE;
688ea4e54b9SDavid Nugent 	hrp->welcome  = _PATH_FTPWELCOME;
689ea4e54b9SDavid Nugent 	hrp->loginmsg = _PATH_FTPLOGINMESG;
690ea4e54b9SDavid Nugent 	hrp->anonuser = "ftp";
691ea4e54b9SDavid Nugent 	hrp->next = NULL;
692ea4e54b9SDavid Nugent 	thishost = firsthost = lhrp = hrp;
693ea4e54b9SDavid Nugent 	if ((fp = fopen(_PATH_FTPHOSTS, "r")) != NULL) {
694ec009cf0SYaroslav Tykhiy 		int addrsize, gothost;
6954dd8b5abSYoshinobu Inoue 		void *addr;
6964dd8b5abSYoshinobu Inoue 		struct hostent *hp;
6974dd8b5abSYoshinobu Inoue 
698737d08f3SYaroslav Tykhiy 		while ((line = fgetln(fp, &len)) != NULL) {
6994dd8b5abSYoshinobu Inoue 			int	i, hp_error;
700ea4e54b9SDavid Nugent 
701737d08f3SYaroslav Tykhiy 			/* skip comments */
702737d08f3SYaroslav Tykhiy 			if (line[0] == '#')
703ea4e54b9SDavid Nugent 				continue;
704737d08f3SYaroslav Tykhiy 			if (line[len - 1] == '\n') {
705737d08f3SYaroslav Tykhiy 				line[len - 1] = '\0';
706737d08f3SYaroslav Tykhiy 				mp = NULL;
707737d08f3SYaroslav Tykhiy 			} else {
708737d08f3SYaroslav Tykhiy 				if ((mp = malloc(len + 1)) == NULL)
709737d08f3SYaroslav Tykhiy 					fatalerror("Ran out of memory.");
710737d08f3SYaroslav Tykhiy 				memcpy(mp, line, len);
711737d08f3SYaroslav Tykhiy 				mp[len] = '\0';
712737d08f3SYaroslav Tykhiy 				line = mp;
713ea4e54b9SDavid Nugent 			}
714ea4e54b9SDavid Nugent 			cp = strtok(line, " \t");
715737d08f3SYaroslav Tykhiy 			/* skip empty lines */
716737d08f3SYaroslav Tykhiy 			if (cp == NULL)
717737d08f3SYaroslav Tykhiy 				goto nextline;
71855b54aa7SYaroslav Tykhiy 			vhost = cp;
71955b54aa7SYaroslav Tykhiy 
72055b54aa7SYaroslav Tykhiy 			/* set defaults */
72155b54aa7SYaroslav Tykhiy 			anonuser = "ftp";
72255b54aa7SYaroslav Tykhiy 			statfile = _PATH_FTPDSTATFILE;
72355b54aa7SYaroslav Tykhiy 			welcome  = _PATH_FTPWELCOME;
72455b54aa7SYaroslav Tykhiy 			loginmsg = _PATH_FTPLOGINMESG;
72555b54aa7SYaroslav Tykhiy 
72655b54aa7SYaroslav Tykhiy 			/*
72755b54aa7SYaroslav Tykhiy 			 * Preparse the line so we can use its info
72855b54aa7SYaroslav Tykhiy 			 * for all the addresses associated with
72955b54aa7SYaroslav Tykhiy 			 * the virtual host name.
73055b54aa7SYaroslav Tykhiy 			 * Field 0, the virtual host name, is special:
73155b54aa7SYaroslav Tykhiy 			 * it's already parsed off and will be strdup'ed
73255b54aa7SYaroslav Tykhiy 			 * later, after we know its canonical form.
73355b54aa7SYaroslav Tykhiy 			 */
73455b54aa7SYaroslav Tykhiy 			for (i = 1; i < 5 && (cp = strtok(NULL, " \t")); i++)
73555b54aa7SYaroslav Tykhiy 				if (*cp != '-' && (cp = strdup(cp)))
73655b54aa7SYaroslav Tykhiy 					switch (i) {
73755b54aa7SYaroslav Tykhiy 					case 1:	/* anon user permissions */
73855b54aa7SYaroslav Tykhiy 						anonuser = cp;
73955b54aa7SYaroslav Tykhiy 						break;
74055b54aa7SYaroslav Tykhiy 					case 2: /* statistics file */
74155b54aa7SYaroslav Tykhiy 						statfile = cp;
74255b54aa7SYaroslav Tykhiy 						break;
74355b54aa7SYaroslav Tykhiy 					case 3: /* welcome message */
74455b54aa7SYaroslav Tykhiy 						welcome  = cp;
74555b54aa7SYaroslav Tykhiy 						break;
74655b54aa7SYaroslav Tykhiy 					case 4: /* login message */
74755b54aa7SYaroslav Tykhiy 						loginmsg = cp;
74855b54aa7SYaroslav Tykhiy 						break;
74955b54aa7SYaroslav Tykhiy 					default: /* programming error */
75055b54aa7SYaroslav Tykhiy 						abort();
75155b54aa7SYaroslav Tykhiy 						/* NOTREACHED */
75255b54aa7SYaroslav Tykhiy 					}
7534dd8b5abSYoshinobu Inoue 
7544dd8b5abSYoshinobu Inoue 			hints.ai_flags = 0;
7554dd8b5abSYoshinobu Inoue 			hints.ai_family = AF_UNSPEC;
7564dd8b5abSYoshinobu Inoue 			hints.ai_flags = AI_PASSIVE;
757b1d8d5cdSYaroslav Tykhiy 			if (getaddrinfo(vhost, NULL, &hints, &res) != 0)
758737d08f3SYaroslav Tykhiy 				goto nextline;
7594dd8b5abSYoshinobu Inoue 			for (ai = res; ai != NULL && ai->ai_addr != NULL;
760b535a9bfSDavid Nugent 			     ai = ai->ai_next) {
7614dd8b5abSYoshinobu Inoue 
762b535a9bfSDavid Nugent 			gothost = 0;
763ea4e54b9SDavid Nugent 			for (hrp = firsthost; hrp != NULL; hrp = hrp->next) {
764f38c6cadSYoshinobu Inoue 				struct addrinfo *hi;
765f38c6cadSYoshinobu Inoue 
766f38c6cadSYoshinobu Inoue 				for (hi = hrp->hostinfo; hi != NULL;
767f38c6cadSYoshinobu Inoue 				     hi = hi->ai_next)
768f38c6cadSYoshinobu Inoue 					if (hi->ai_addrlen == ai->ai_addrlen &&
769f38c6cadSYoshinobu Inoue 					    memcmp(hi->ai_addr,
7704dd8b5abSYoshinobu Inoue 						   ai->ai_addr,
771b535a9bfSDavid Nugent 						   ai->ai_addr->sa_len) == 0) {
772b535a9bfSDavid Nugent 						gothost++;
773b535a9bfSDavid Nugent 						break;
774b535a9bfSDavid Nugent 					}
775b535a9bfSDavid Nugent 				if (gothost)
776ea4e54b9SDavid Nugent 					break;
777ea4e54b9SDavid Nugent 			}
778ea4e54b9SDavid Nugent 			if (hrp == NULL) {
779ea4e54b9SDavid Nugent 				if ((hrp = malloc(sizeof(struct ftphost))) == NULL)
780737d08f3SYaroslav Tykhiy 					goto nextline;
781b1d8d5cdSYaroslav Tykhiy 				hrp->hostname = NULL;
78255b54aa7SYaroslav Tykhiy 				insert = 1;
783f2fe752dSYaroslav Tykhiy 			} else {
7841f75c13eSYaroslav Tykhiy 				if (hrp->hostinfo && hrp->hostinfo != res)
785b1d8d5cdSYaroslav Tykhiy 					freeaddrinfo(hrp->hostinfo);
786f2fe752dSYaroslav Tykhiy 				insert = 0; /* host already in the chain */
787f2fe752dSYaroslav Tykhiy 			}
788f38c6cadSYoshinobu Inoue 			hrp->hostinfo = res;
789f38c6cadSYoshinobu Inoue 
790ea4e54b9SDavid Nugent 			/*
791ea4e54b9SDavid Nugent 			 * determine hostname to use.
7924dd8b5abSYoshinobu Inoue 			 * force defined name if there is a valid alias
793ea4e54b9SDavid Nugent 			 * otherwise fallback to primary hostname
794ea4e54b9SDavid Nugent 			 */
7954dd8b5abSYoshinobu Inoue 			/* XXX: getaddrinfo() can't do alias check */
796f38c6cadSYoshinobu Inoue 			switch(hrp->hostinfo->ai_family) {
7974dd8b5abSYoshinobu Inoue 			case AF_INET:
7984b4cc4c6SYaroslav Tykhiy 				addr = &((struct sockaddr_in *)hrp->hostinfo->ai_addr)->sin_addr;
7994b4cc4c6SYaroslav Tykhiy 				addrsize = sizeof(struct in_addr);
8004dd8b5abSYoshinobu Inoue 				break;
8014dd8b5abSYoshinobu Inoue 			case AF_INET6:
8024b4cc4c6SYaroslav Tykhiy 				addr = &((struct sockaddr_in6 *)hrp->hostinfo->ai_addr)->sin6_addr;
8034b4cc4c6SYaroslav Tykhiy 				addrsize = sizeof(struct in6_addr);
8044dd8b5abSYoshinobu Inoue 				break;
8054dd8b5abSYoshinobu Inoue 			default:
8064dd8b5abSYoshinobu Inoue 				/* should not reach here */
807f38c6cadSYoshinobu Inoue 				freeaddrinfo(hrp->hostinfo);
808f2fe752dSYaroslav Tykhiy 				if (insert)
809f2fe752dSYaroslav Tykhiy 					free(hrp); /*not in chain, can free*/
810f2fe752dSYaroslav Tykhiy 				else
811f2fe752dSYaroslav Tykhiy 					hrp->hostinfo = NULL; /*mark as blank*/
812737d08f3SYaroslav Tykhiy 				goto nextline;
8134dd8b5abSYoshinobu Inoue 				/* NOTREACHED */
8144dd8b5abSYoshinobu Inoue 			}
81557d4ef07SYaroslav Tykhiy 			if ((hp = getipnodebyaddr(addr, addrsize,
816f38c6cadSYoshinobu Inoue 						  hrp->hostinfo->ai_family,
8174dd8b5abSYoshinobu Inoue 						  &hp_error)) != NULL) {
81855b54aa7SYaroslav Tykhiy 				if (strcmp(vhost, hp->h_name) != 0) {
819ea4e54b9SDavid Nugent 					if (hp->h_aliases == NULL)
82055b54aa7SYaroslav Tykhiy 						vhost = hp->h_name;
821ea4e54b9SDavid Nugent 					else {
822ea4e54b9SDavid Nugent 						i = 0;
823ea4e54b9SDavid Nugent 						while (hp->h_aliases[i] &&
82455b54aa7SYaroslav Tykhiy 						       strcmp(vhost, hp->h_aliases[i]) != 0)
825ea4e54b9SDavid Nugent 							++i;
826ea4e54b9SDavid Nugent 						if (hp->h_aliases[i] == NULL)
82755b54aa7SYaroslav Tykhiy 							vhost = hp->h_name;
828ea4e54b9SDavid Nugent 					}
829ea4e54b9SDavid Nugent 				}
830ea4e54b9SDavid Nugent 			}
831b1d8d5cdSYaroslav Tykhiy 			if (hrp->hostname &&
832b1d8d5cdSYaroslav Tykhiy 			    strcmp(hrp->hostname, vhost) != 0) {
833b1d8d5cdSYaroslav Tykhiy 				free(hrp->hostname);
834b1d8d5cdSYaroslav Tykhiy 				hrp->hostname = NULL;
835b1d8d5cdSYaroslav Tykhiy 			}
836b1d8d5cdSYaroslav Tykhiy 			if (hrp->hostname == NULL &&
837f2fe752dSYaroslav Tykhiy 			    (hrp->hostname = strdup(vhost)) == NULL) {
838f2fe752dSYaroslav Tykhiy 				freeaddrinfo(hrp->hostinfo);
839f2fe752dSYaroslav Tykhiy 				hrp->hostinfo = NULL; /* mark as blank */
840f2fe752dSYaroslav Tykhiy 				if (hp)
841f2fe752dSYaroslav Tykhiy 					freehostent(hp);
84255b54aa7SYaroslav Tykhiy 				goto nextline;
843f2fe752dSYaroslav Tykhiy 			}
84455b54aa7SYaroslav Tykhiy 			hrp->anonuser = anonuser;
84555b54aa7SYaroslav Tykhiy 			hrp->statfile = statfile;
84655b54aa7SYaroslav Tykhiy 			hrp->welcome  = welcome;
84755b54aa7SYaroslav Tykhiy 			hrp->loginmsg = loginmsg;
84855b54aa7SYaroslav Tykhiy 			if (insert) {
84955b54aa7SYaroslav Tykhiy 				hrp->next  = NULL;
85055b54aa7SYaroslav Tykhiy 				lhrp->next = hrp;
85155b54aa7SYaroslav Tykhiy 				lhrp = hrp;
85255b54aa7SYaroslav Tykhiy 			}
853233c0f66SYaroslav Tykhiy 			if (hp)
8544dd8b5abSYoshinobu Inoue 				freehostent(hp);
8554dd8b5abSYoshinobu Inoue 		      }
856737d08f3SYaroslav Tykhiy nextline:
857737d08f3SYaroslav Tykhiy 			if (mp)
858737d08f3SYaroslav Tykhiy 				free(mp);
859ea4e54b9SDavid Nugent 		}
860ea4e54b9SDavid Nugent 		(void) fclose(fp);
861ea4e54b9SDavid Nugent 	}
862ea4e54b9SDavid Nugent }
863ea4e54b9SDavid Nugent 
864ea4e54b9SDavid Nugent static void
865e4bc453cSWarner Losh selecthost(union sockunion *su)
866ea4e54b9SDavid Nugent {
867ea4e54b9SDavid Nugent 	struct ftphost	*hrp;
8684dd8b5abSYoshinobu Inoue 	u_int16_t port;
8694dd8b5abSYoshinobu Inoue #ifdef INET6
8704dd8b5abSYoshinobu Inoue 	struct in6_addr *mapped_in6 = NULL;
8714dd8b5abSYoshinobu Inoue #endif
872f38c6cadSYoshinobu Inoue 	struct addrinfo *hi;
8734dd8b5abSYoshinobu Inoue 
8744dd8b5abSYoshinobu Inoue #ifdef INET6
8754dd8b5abSYoshinobu Inoue 	/*
8764dd8b5abSYoshinobu Inoue 	 * XXX IPv4 mapped IPv6 addr consideraton,
8774dd8b5abSYoshinobu Inoue 	 * specified in rfc2373.
8784dd8b5abSYoshinobu Inoue 	 */
8794dd8b5abSYoshinobu Inoue 	if (su->su_family == AF_INET6 &&
8804dd8b5abSYoshinobu Inoue 	    IN6_IS_ADDR_V4MAPPED(&su->su_sin6.sin6_addr))
8814dd8b5abSYoshinobu Inoue 		mapped_in6 = &su->su_sin6.sin6_addr;
8824dd8b5abSYoshinobu Inoue #endif
883ea4e54b9SDavid Nugent 
884ea4e54b9SDavid Nugent 	hrp = thishost = firsthost;	/* default */
8854dd8b5abSYoshinobu Inoue 	port = su->su_port;
8864dd8b5abSYoshinobu Inoue 	su->su_port = 0;
887ea4e54b9SDavid Nugent 	while (hrp != NULL) {
888b535a9bfSDavid Nugent 	    for (hi = hrp->hostinfo; hi != NULL; hi = hi->ai_next) {
889f38c6cadSYoshinobu Inoue 		if (memcmp(su, hi->ai_addr, hi->ai_addrlen) == 0) {
890ea4e54b9SDavid Nugent 			thishost = hrp;
891ea4e54b9SDavid Nugent 			break;
892ea4e54b9SDavid Nugent 		}
8934dd8b5abSYoshinobu Inoue #ifdef INET6
8944dd8b5abSYoshinobu Inoue 		/* XXX IPv4 mapped IPv6 addr consideraton */
895f38c6cadSYoshinobu Inoue 		if (hi->ai_addr->sa_family == AF_INET && mapped_in6 != NULL &&
8964dd8b5abSYoshinobu Inoue 		    (memcmp(&mapped_in6->s6_addr[12],
897f38c6cadSYoshinobu Inoue 			    &((struct sockaddr_in *)hi->ai_addr)->sin_addr,
8984dd8b5abSYoshinobu Inoue 			    sizeof(struct in_addr)) == 0)) {
8994dd8b5abSYoshinobu Inoue 			thishost = hrp;
9004dd8b5abSYoshinobu Inoue 			break;
9014dd8b5abSYoshinobu Inoue 		}
9024dd8b5abSYoshinobu Inoue #endif
903f38c6cadSYoshinobu Inoue 	    }
904ea4e54b9SDavid Nugent 	    hrp = hrp->next;
905ea4e54b9SDavid Nugent 	}
9064dd8b5abSYoshinobu Inoue 	su->su_port = port;
907ea4e54b9SDavid Nugent 	/* setup static variables as appropriate */
908ea4e54b9SDavid Nugent 	hostname = thishost->hostname;
909ea4e54b9SDavid Nugent 	ftpuser = thishost->anonuser;
910ea4e54b9SDavid Nugent }
911ea4e54b9SDavid Nugent #endif
912ea4e54b9SDavid Nugent 
913ea022d16SRodney W. Grimes /*
914ea022d16SRodney W. Grimes  * Helper function for sgetpwnam().
915ea022d16SRodney W. Grimes  */
916ea022d16SRodney W. Grimes static char *
917e4bc453cSWarner Losh sgetsave(char *s)
918ea022d16SRodney W. Grimes {
919ea022d16SRodney W. Grimes 	char *new = malloc((unsigned) strlen(s) + 1);
920ea022d16SRodney W. Grimes 
921ea022d16SRodney W. Grimes 	if (new == NULL) {
922ea022d16SRodney W. Grimes 		perror_reply(421, "Local resource failure: malloc");
923ea022d16SRodney W. Grimes 		dologout(1);
924ea022d16SRodney W. Grimes 		/* NOTREACHED */
925ea022d16SRodney W. Grimes 	}
926ea022d16SRodney W. Grimes 	(void) strcpy(new, s);
927ea022d16SRodney W. Grimes 	return (new);
928ea022d16SRodney W. Grimes }
929ea022d16SRodney W. Grimes 
930ea022d16SRodney W. Grimes /*
931ea022d16SRodney W. Grimes  * Save the result of a getpwnam.  Used for USER command, since
932ea022d16SRodney W. Grimes  * the data returned must not be clobbered by any other command
933ea022d16SRodney W. Grimes  * (e.g., globbing).
934ea022d16SRodney W. Grimes  */
935ea022d16SRodney W. Grimes static struct passwd *
936e4bc453cSWarner Losh sgetpwnam(char *name)
937ea022d16SRodney W. Grimes {
938ea022d16SRodney W. Grimes 	static struct passwd save;
939ea022d16SRodney W. Grimes 	struct passwd *p;
940ea022d16SRodney W. Grimes 
941ea022d16SRodney W. Grimes 	if ((p = getpwnam(name)) == NULL)
942ea022d16SRodney W. Grimes 		return (p);
943ea022d16SRodney W. Grimes 	if (save.pw_name) {
944ea022d16SRodney W. Grimes 		free(save.pw_name);
945ea022d16SRodney W. Grimes 		free(save.pw_passwd);
946ea022d16SRodney W. Grimes 		free(save.pw_gecos);
947ea022d16SRodney W. Grimes 		free(save.pw_dir);
948ea022d16SRodney W. Grimes 		free(save.pw_shell);
949ea022d16SRodney W. Grimes 	}
950ea022d16SRodney W. Grimes 	save = *p;
951ea022d16SRodney W. Grimes 	save.pw_name = sgetsave(p->pw_name);
952ea022d16SRodney W. Grimes 	save.pw_passwd = sgetsave(p->pw_passwd);
953ea022d16SRodney W. Grimes 	save.pw_gecos = sgetsave(p->pw_gecos);
954ea022d16SRodney W. Grimes 	save.pw_dir = sgetsave(p->pw_dir);
955ea022d16SRodney W. Grimes 	save.pw_shell = sgetsave(p->pw_shell);
956ea022d16SRodney W. Grimes 	return (&save);
957ea022d16SRodney W. Grimes }
958ea022d16SRodney W. Grimes 
959ea022d16SRodney W. Grimes static int login_attempts;	/* number of failed login attempts */
960ea022d16SRodney W. Grimes static int askpasswd;		/* had user command, ask for passwd */
96190906a46SSheldon Hearn static char curname[MAXLOGNAME];	/* current USER name */
962ea022d16SRodney W. Grimes 
963ea022d16SRodney W. Grimes /*
964ea022d16SRodney W. Grimes  * USER command.
965ea022d16SRodney W. Grimes  * Sets global passwd pointer pw if named account exists and is acceptable;
966ea022d16SRodney W. Grimes  * sets askpasswd if a PASS command is expected.  If logged in previously,
967ea022d16SRodney W. Grimes  * need to reset state.  If name is "ftp" or "anonymous", the name is not in
968ea022d16SRodney W. Grimes  * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
969ea022d16SRodney W. Grimes  * If account doesn't exist, ask for passwd anyway.  Otherwise, check user
970ea022d16SRodney W. Grimes  * requesting login privileges.  Disallow anyone who does not have a standard
971ea022d16SRodney W. Grimes  * shell as returned by getusershell().  Disallow anyone mentioned in the file
972ea022d16SRodney W. Grimes  * _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
973ea022d16SRodney W. Grimes  */
974ea022d16SRodney W. Grimes void
975e4bc453cSWarner Losh user(char *name)
976ea022d16SRodney W. Grimes {
977ea022d16SRodney W. Grimes 	char *cp, *shell;
978ea022d16SRodney W. Grimes 
979ea022d16SRodney W. Grimes 	if (logged_in) {
980ea022d16SRodney W. Grimes 		if (guest) {
981ea022d16SRodney W. Grimes 			reply(530, "Can't change user from guest login.");
982ea022d16SRodney W. Grimes 			return;
983a5a4544eSPaul Traina 		} else if (dochroot) {
984a5a4544eSPaul Traina 			reply(530, "Can't change user from chroot user.");
985a5a4544eSPaul Traina 			return;
986ea022d16SRodney W. Grimes 		}
987ea022d16SRodney W. Grimes 		end_login();
988ea022d16SRodney W. Grimes 	}
989ea022d16SRodney W. Grimes 
990ea022d16SRodney W. Grimes 	guest = 0;
99163047c6fSDavid E. O'Brien #ifdef VIRTUAL_HOSTING
99263047c6fSDavid E. O'Brien 	pw = sgetpwnam(thishost->anonuser);
99363047c6fSDavid E. O'Brien #else
99463047c6fSDavid E. O'Brien 	pw = sgetpwnam("ftp");
99563047c6fSDavid E. O'Brien #endif
996ea022d16SRodney W. Grimes 	if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
9978657b576SYaroslav Tykhiy 		if (checkuser(_PATH_FTPUSERS, "ftp", 0, NULL) ||
9988657b576SYaroslav Tykhiy 		    checkuser(_PATH_FTPUSERS, "anonymous", 0, NULL))
999ea022d16SRodney W. Grimes 			reply(530, "User %s access denied.", name);
100063047c6fSDavid E. O'Brien 		else if (pw != NULL) {
1001ea022d16SRodney W. Grimes 			guest = 1;
1002ea022d16SRodney W. Grimes 			askpasswd = 1;
1003ea022d16SRodney W. Grimes 			reply(331,
10042c60c54cSPaul Traina 			"Guest login ok, send your email address as password.");
1005ea022d16SRodney W. Grimes 		} else
1006ea022d16SRodney W. Grimes 			reply(530, "User %s unknown.", name);
1007ea022d16SRodney W. Grimes 		if (!askpasswd && logging)
1008ea022d16SRodney W. Grimes 			syslog(LOG_NOTICE,
1009ea022d16SRodney W. Grimes 			    "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost);
1010ea022d16SRodney W. Grimes 		return;
1011ea022d16SRodney W. Grimes 	}
10125a392aecSTorsten Blum 	if (anon_only != 0) {
10135a392aecSTorsten Blum 		reply(530, "Sorry, only anonymous ftp allowed.");
10145a392aecSTorsten Blum 		return;
10155a392aecSTorsten Blum 	}
10165a392aecSTorsten Blum 
10179aca17cbSMark Murray 	if ((pw = sgetpwnam(name))) {
1018ea022d16SRodney W. Grimes 		if ((shell = pw->pw_shell) == NULL || *shell == 0)
1019ea022d16SRodney W. Grimes 			shell = _PATH_BSHELL;
1020c433c9daSPhilippe Charnier 		setusershell();
1021ea022d16SRodney W. Grimes 		while ((cp = getusershell()) != NULL)
1022ea022d16SRodney W. Grimes 			if (strcmp(cp, shell) == 0)
1023ea022d16SRodney W. Grimes 				break;
1024ea022d16SRodney W. Grimes 		endusershell();
1025ea022d16SRodney W. Grimes 
10268657b576SYaroslav Tykhiy 		if (cp == NULL || checkuser(_PATH_FTPUSERS, name, 1, NULL)) {
1027ea022d16SRodney W. Grimes 			reply(530, "User %s access denied.", name);
1028ea022d16SRodney W. Grimes 			if (logging)
1029ea022d16SRodney W. Grimes 				syslog(LOG_NOTICE,
1030ea022d16SRodney W. Grimes 				    "FTP LOGIN REFUSED FROM %s, %s",
1031ea022d16SRodney W. Grimes 				    remotehost, name);
1032ea022d16SRodney W. Grimes 			pw = (struct passwd *) NULL;
1033ea022d16SRodney W. Grimes 			return;
1034ea022d16SRodney W. Grimes 		}
1035ea022d16SRodney W. Grimes 	}
1036ea022d16SRodney W. Grimes 	if (logging)
1037ea022d16SRodney W. Grimes 		strncpy(curname, name, sizeof(curname)-1);
103847499ecdSAndrey A. Chernov 
103947499ecdSAndrey A. Chernov 	pwok = 0;
1040fa1746c9SMark Murray #ifdef USE_PAM
1041fa1746c9SMark Murray 	/* XXX Kluge! The conversation mechanism needs to be fixed. */
1042726040deSGuido van Rooij #endif
104347499ecdSAndrey A. Chernov 	if (opiechallenge(&opiedata, name, opieprompt) == 0) {
104447499ecdSAndrey A. Chernov 		pwok = (pw != NULL) &&
104547499ecdSAndrey A. Chernov 		       opieaccessfile(remotehost) &&
104647499ecdSAndrey A. Chernov 		       opiealways(pw->pw_dir);
104747499ecdSAndrey A. Chernov 		reply(331, "Response to %s %s for %s.",
104847499ecdSAndrey A. Chernov 		      opieprompt, pwok ? "requested" : "required", name);
104947499ecdSAndrey A. Chernov 	} else {
105047499ecdSAndrey A. Chernov 		pwok = 1;
105147499ecdSAndrey A. Chernov 		reply(331, "Password required for %s.", name);
105247499ecdSAndrey A. Chernov 	}
1053ea022d16SRodney W. Grimes 	askpasswd = 1;
1054ea022d16SRodney W. Grimes 	/*
1055ea022d16SRodney W. Grimes 	 * Delay before reading passwd after first failed
1056ea022d16SRodney W. Grimes 	 * attempt to slow down passwd-guessing programs.
1057ea022d16SRodney W. Grimes 	 */
1058ea022d16SRodney W. Grimes 	if (login_attempts)
1059ea022d16SRodney W. Grimes 		sleep((unsigned) login_attempts);
1060ea022d16SRodney W. Grimes }
1061ea022d16SRodney W. Grimes 
1062ea022d16SRodney W. Grimes /*
10638657b576SYaroslav Tykhiy  * Check if a user is in the file "fname",
10648657b576SYaroslav Tykhiy  * return a pointer to a malloc'd string with the rest
10658657b576SYaroslav Tykhiy  * of the matching line in "residue" if not NULL.
1066ea022d16SRodney W. Grimes  */
1067ea022d16SRodney W. Grimes static int
10688657b576SYaroslav Tykhiy checkuser(char *fname, char *name, int pwset, char **residue)
1069ea022d16SRodney W. Grimes {
1070ea022d16SRodney W. Grimes 	FILE *fd;
1071ea022d16SRodney W. Grimes 	int found = 0;
1072737d08f3SYaroslav Tykhiy 	size_t len;
1073737d08f3SYaroslav Tykhiy 	char *line, *mp, *p;
1074ea022d16SRodney W. Grimes 
1075a5a4544eSPaul Traina 	if ((fd = fopen(fname, "r")) != NULL) {
1076737d08f3SYaroslav Tykhiy 		while (!found && (line = fgetln(fd, &len)) != NULL) {
1077737d08f3SYaroslav Tykhiy 			/* skip comments */
1078ea022d16SRodney W. Grimes 			if (line[0] == '#')
1079ea022d16SRodney W. Grimes 				continue;
1080737d08f3SYaroslav Tykhiy 			if (line[len - 1] == '\n') {
1081737d08f3SYaroslav Tykhiy 				line[len - 1] = '\0';
1082737d08f3SYaroslav Tykhiy 				mp = NULL;
1083737d08f3SYaroslav Tykhiy 			} else {
1084737d08f3SYaroslav Tykhiy 				if ((mp = malloc(len + 1)) == NULL)
1085737d08f3SYaroslav Tykhiy 					fatalerror("Ran out of memory.");
1086737d08f3SYaroslav Tykhiy 				memcpy(mp, line, len);
1087737d08f3SYaroslav Tykhiy 				mp[len] = '\0';
1088737d08f3SYaroslav Tykhiy 				line = mp;
1089737d08f3SYaroslav Tykhiy 			}
1090737d08f3SYaroslav Tykhiy 			/* avoid possible leading and trailing whitespace */
1091737d08f3SYaroslav Tykhiy 			p = strtok(line, " \t");
1092737d08f3SYaroslav Tykhiy 			/* skip empty lines */
1093737d08f3SYaroslav Tykhiy 			if (p == NULL)
1094737d08f3SYaroslav Tykhiy 				goto nextline;
109531fea7b8SDavid Nugent 			/*
109631fea7b8SDavid Nugent 			 * if first chr is '@', check group membership
109731fea7b8SDavid Nugent 			 */
1098737d08f3SYaroslav Tykhiy 			if (p[0] == '@') {
109931fea7b8SDavid Nugent 				int i = 0;
110031fea7b8SDavid Nugent 				struct group *grp;
110131fea7b8SDavid Nugent 
11028657b576SYaroslav Tykhiy 				if (p[1] == '\0') /* single @ matches anyone */
11038657b576SYaroslav Tykhiy 					found = 1;
11048657b576SYaroslav Tykhiy 				else {
1105737d08f3SYaroslav Tykhiy 					if ((grp = getgrnam(p+1)) == NULL)
1106737d08f3SYaroslav Tykhiy 						goto nextline;
11077edcb936SSteve Price 					/*
11087edcb936SSteve Price 					 * Check user's default group
11097edcb936SSteve Price 					 */
11107edcb936SSteve Price 					if (pwset && grp->gr_gid == pw->pw_gid)
11117edcb936SSteve Price 						found = 1;
11127edcb936SSteve Price 					/*
11137edcb936SSteve Price 					 * Check supplementary groups
11147edcb936SSteve Price 					 */
111531fea7b8SDavid Nugent 					while (!found && grp->gr_mem[i])
111631fea7b8SDavid Nugent 						found = strcmp(name,
111731fea7b8SDavid Nugent 							grp->gr_mem[i++])
111831fea7b8SDavid Nugent 							== 0;
1119ea022d16SRodney W. Grimes 				}
11208657b576SYaroslav Tykhiy 			}
112131fea7b8SDavid Nugent 			/*
112231fea7b8SDavid Nugent 			 * Otherwise, just check for username match
112331fea7b8SDavid Nugent 			 */
112431fea7b8SDavid Nugent 			else
1125737d08f3SYaroslav Tykhiy 				found = strcmp(p, name) == 0;
11268657b576SYaroslav Tykhiy 			/*
11278657b576SYaroslav Tykhiy 			 * Save the rest of line to "residue" if matched
11288657b576SYaroslav Tykhiy 			 */
11298657b576SYaroslav Tykhiy 			if (found && residue) {
11300ba71e24SYaroslav Tykhiy 				if ((p = strtok(NULL, "")) != NULL)
11310ba71e24SYaroslav Tykhiy 					p += strspn(p, " \t");
11320ba71e24SYaroslav Tykhiy 				if (p && *p) {
11338657b576SYaroslav Tykhiy 				 	if ((*residue = strdup(p)) == NULL)
11348657b576SYaroslav Tykhiy 						fatalerror("Ran out of memory.");
11358657b576SYaroslav Tykhiy 				} else
11368657b576SYaroslav Tykhiy 					*residue = NULL;
11378657b576SYaroslav Tykhiy 			}
1138737d08f3SYaroslav Tykhiy nextline:
1139737d08f3SYaroslav Tykhiy 			if (mp)
1140737d08f3SYaroslav Tykhiy 				free(mp);
1141ea022d16SRodney W. Grimes 		}
1142ea022d16SRodney W. Grimes 		(void) fclose(fd);
1143ea022d16SRodney W. Grimes 	}
1144ea022d16SRodney W. Grimes 	return (found);
1145ea022d16SRodney W. Grimes }
1146ea022d16SRodney W. Grimes 
1147ea022d16SRodney W. Grimes /*
1148ea022d16SRodney W. Grimes  * Terminate login as previous user, if any, resetting state;
1149ea022d16SRodney W. Grimes  * used when USER command is given or login fails.
1150ea022d16SRodney W. Grimes  */
1151ea022d16SRodney W. Grimes static void
1152e4bc453cSWarner Losh end_login(void)
1153ea022d16SRodney W. Grimes {
11545bc9d93dSMark Murray #ifdef USE_PAM
11555bc9d93dSMark Murray 	int e;
11565bc9d93dSMark Murray #endif
1157ea022d16SRodney W. Grimes 
1158ea022d16SRodney W. Grimes 	(void) seteuid((uid_t)0);
11595d7e0128SYaroslav Tykhiy 	if (logged_in && dowtmp)
116046948173SHajimu UMEMOTO 		ftpd_logwtmp(ttyline, "", NULL);
1161ea022d16SRodney W. Grimes 	pw = NULL;
1162b071c689SDavid Nugent #ifdef	LOGIN_CAP
1163b071c689SDavid Nugent 	setusercontext(NULL, getpwuid(0), (uid_t)0,
1164d9e2c424SRobert Watson 		       LOGIN_SETPRIORITY|LOGIN_SETRESOURCES|LOGIN_SETUMASK|
1165d9e2c424SRobert Watson 		       LOGIN_SETMAC);
1166b071c689SDavid Nugent #endif
11675bc9d93dSMark Murray #ifdef USE_PAM
11685bc9d93dSMark Murray 	if ((e = pam_setcred(pamh, PAM_DELETE_CRED)) != PAM_SUCCESS)
11695bc9d93dSMark Murray 		syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
11705bc9d93dSMark Murray 	if ((e = pam_close_session(pamh,0)) != PAM_SUCCESS)
11715bc9d93dSMark Murray 		syslog(LOG_ERR, "pam_close_session: %s", pam_strerror(pamh, e));
11725bc9d93dSMark Murray 	if ((e = pam_end(pamh, e)) != PAM_SUCCESS)
11735bc9d93dSMark Murray 		syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
11745bc9d93dSMark Murray 	pamh = NULL;
11755bc9d93dSMark Murray #endif
1176ea022d16SRodney W. Grimes 	logged_in = 0;
1177ea022d16SRodney W. Grimes 	guest = 0;
1178a5a4544eSPaul Traina 	dochroot = 0;
1179ea022d16SRodney W. Grimes }
1180ea022d16SRodney W. Grimes 
11815bc9d93dSMark Murray #ifdef USE_PAM
11826c9134c0SMark Murray 
11836c9134c0SMark Murray /*
11846c9134c0SMark Murray  * the following code is stolen from imap-uw PAM authentication module and
11856c9134c0SMark Murray  * login.c
11866c9134c0SMark Murray  */
11876c9134c0SMark Murray #define COPY_STRING(s) (s ? strdup(s) : NULL)
11886c9134c0SMark Murray 
11896c9134c0SMark Murray struct cred_t {
11906c9134c0SMark Murray 	const char *uname;		/* user name */
11916c9134c0SMark Murray 	const char *pass;		/* password */
11926c9134c0SMark Murray };
11936c9134c0SMark Murray typedef struct cred_t cred_t;
11946c9134c0SMark Murray 
11956c9134c0SMark Murray static int
11966c9134c0SMark Murray auth_conv(int num_msg, const struct pam_message **msg,
11976c9134c0SMark Murray 	  struct pam_response **resp, void *appdata)
11986c9134c0SMark Murray {
11996c9134c0SMark Murray 	int i;
12006c9134c0SMark Murray 	cred_t *cred = (cred_t *) appdata;
120160769b19SDag-Erling Smørgrav 	struct pam_response *reply;
120260769b19SDag-Erling Smørgrav 
120360769b19SDag-Erling Smørgrav 	reply = calloc(num_msg, sizeof *reply);
120460769b19SDag-Erling Smørgrav 	if (reply == NULL)
120560769b19SDag-Erling Smørgrav 		return PAM_BUF_ERR;
12066c9134c0SMark Murray 
12076c9134c0SMark Murray 	for (i = 0; i < num_msg; i++) {
12086c9134c0SMark Murray 		switch (msg[i]->msg_style) {
12096c9134c0SMark Murray 		case PAM_PROMPT_ECHO_ON:	/* assume want user name */
12106c9134c0SMark Murray 			reply[i].resp_retcode = PAM_SUCCESS;
12116c9134c0SMark Murray 			reply[i].resp = COPY_STRING(cred->uname);
12126c9134c0SMark Murray 			/* PAM frees resp. */
12136c9134c0SMark Murray 			break;
12146c9134c0SMark Murray 		case PAM_PROMPT_ECHO_OFF:	/* assume want password */
12156c9134c0SMark Murray 			reply[i].resp_retcode = PAM_SUCCESS;
12166c9134c0SMark Murray 			reply[i].resp = COPY_STRING(cred->pass);
12176c9134c0SMark Murray 			/* PAM frees resp. */
12186c9134c0SMark Murray 			break;
12196c9134c0SMark Murray 		case PAM_TEXT_INFO:
12206c9134c0SMark Murray 		case PAM_ERROR_MSG:
12216c9134c0SMark Murray 			reply[i].resp_retcode = PAM_SUCCESS;
12226c9134c0SMark Murray 			reply[i].resp = NULL;
12236c9134c0SMark Murray 			break;
12246c9134c0SMark Murray 		default:			/* unknown message style */
12256c9134c0SMark Murray 			free(reply);
12266c9134c0SMark Murray 			return PAM_CONV_ERR;
12276c9134c0SMark Murray 		}
12286c9134c0SMark Murray 	}
12296c9134c0SMark Murray 
12306c9134c0SMark Murray 	*resp = reply;
12316c9134c0SMark Murray 	return PAM_SUCCESS;
12326c9134c0SMark Murray }
12336c9134c0SMark Murray 
12346c9134c0SMark Murray /*
12356c9134c0SMark Murray  * Attempt to authenticate the user using PAM.  Returns 0 if the user is
12366c9134c0SMark Murray  * authenticated, or 1 if not authenticated.  If some sort of PAM system
12376c9134c0SMark Murray  * error occurs (e.g., the "/etc/pam.conf" file is missing) then this
12386c9134c0SMark Murray  * function returns -1.  This can be used as an indication that we should
12396c9134c0SMark Murray  * fall back to a different authentication mechanism.
12406c9134c0SMark Murray  */
12416c9134c0SMark Murray static int
12426c9134c0SMark Murray auth_pam(struct passwd **ppw, const char *pass)
12436c9134c0SMark Murray {
12446c9134c0SMark Murray 	pam_handle_t *pamh = NULL;
12456c9134c0SMark Murray 	const char *tmpl_user;
12466c9134c0SMark Murray 	const void *item;
12476c9134c0SMark Murray 	int rval;
12486c9134c0SMark Murray 	int e;
12496c9134c0SMark Murray 	cred_t auth_cred = { (*ppw)->pw_name, pass };
12506c9134c0SMark Murray 	struct pam_conv conv = { &auth_conv, &auth_cred };
12516c9134c0SMark Murray 
12526c9134c0SMark Murray 	e = pam_start("ftpd", (*ppw)->pw_name, &conv, &pamh);
12536c9134c0SMark Murray 	if (e != PAM_SUCCESS) {
12546c9134c0SMark Murray 		syslog(LOG_ERR, "pam_start: %s", pam_strerror(pamh, e));
12556c9134c0SMark Murray 		return -1;
12566c9134c0SMark Murray 	}
12576c9134c0SMark Murray 
1258ea413ab7SGuido van Rooij 	e = pam_set_item(pamh, PAM_RHOST, remotehost);
1259ea413ab7SGuido van Rooij 	if (e != PAM_SUCCESS) {
1260ea413ab7SGuido van Rooij 		syslog(LOG_ERR, "pam_set_item(PAM_RHOST): %s",
1261ea413ab7SGuido van Rooij 			pam_strerror(pamh, e));
1262ea413ab7SGuido van Rooij 		return -1;
1263ea413ab7SGuido van Rooij 	}
1264ea413ab7SGuido van Rooij 
12656c9134c0SMark Murray 	e = pam_authenticate(pamh, 0);
12666c9134c0SMark Murray 	switch (e) {
12676c9134c0SMark Murray 	case PAM_SUCCESS:
12686c9134c0SMark Murray 		/*
12696c9134c0SMark Murray 		 * With PAM we support the concept of a "template"
12706c9134c0SMark Murray 		 * user.  The user enters a login name which is
12716c9134c0SMark Murray 		 * authenticated by PAM, usually via a remote service
12726c9134c0SMark Murray 		 * such as RADIUS or TACACS+.  If authentication
12736c9134c0SMark Murray 		 * succeeds, a different but related "template" name
12746c9134c0SMark Murray 		 * is used for setting the credentials, shell, and
12756c9134c0SMark Murray 		 * home directory.  The name the user enters need only
12766c9134c0SMark Murray 		 * exist on the remote authentication server, but the
12776c9134c0SMark Murray 		 * template name must be present in the local password
12786c9134c0SMark Murray 		 * database.
12796c9134c0SMark Murray 		 *
12806c9134c0SMark Murray 		 * This is supported by two various mechanisms in the
12816c9134c0SMark Murray 		 * individual modules.  However, from the application's
12826c9134c0SMark Murray 		 * point of view, the template user is always passed
12836c9134c0SMark Murray 		 * back as a changed value of the PAM_USER item.
12846c9134c0SMark Murray 		 */
12856c9134c0SMark Murray 		if ((e = pam_get_item(pamh, PAM_USER, &item)) ==
12866c9134c0SMark Murray 		    PAM_SUCCESS) {
12876c9134c0SMark Murray 			tmpl_user = (const char *) item;
12886c9134c0SMark Murray 			if (strcmp((*ppw)->pw_name, tmpl_user) != 0)
12896c9134c0SMark Murray 				*ppw = getpwnam(tmpl_user);
12906c9134c0SMark Murray 		} else
12916c9134c0SMark Murray 			syslog(LOG_ERR, "Couldn't get PAM_USER: %s",
12926c9134c0SMark Murray 			    pam_strerror(pamh, e));
12936c9134c0SMark Murray 		rval = 0;
12946c9134c0SMark Murray 		break;
12956c9134c0SMark Murray 
12966c9134c0SMark Murray 	case PAM_AUTH_ERR:
12976c9134c0SMark Murray 	case PAM_USER_UNKNOWN:
12986c9134c0SMark Murray 	case PAM_MAXTRIES:
12996c9134c0SMark Murray 		rval = 1;
13006c9134c0SMark Murray 		break;
13016c9134c0SMark Murray 
13026c9134c0SMark Murray 	default:
13035bc9d93dSMark Murray 		syslog(LOG_ERR, "pam_authenticate: %s", pam_strerror(pamh, e));
13046c9134c0SMark Murray 		rval = -1;
13056c9134c0SMark Murray 		break;
13066c9134c0SMark Murray 	}
13076c9134c0SMark Murray 
13085bc9d93dSMark Murray 	if (rval == 0) {
13095bc9d93dSMark Murray 		e = pam_acct_mgmt(pamh, 0);
13105bc9d93dSMark Murray 		if (e == PAM_NEW_AUTHTOK_REQD) {
13115bc9d93dSMark Murray 			e = pam_chauthtok(pamh, PAM_CHANGE_EXPIRED_AUTHTOK);
13125bc9d93dSMark Murray 			if (e != PAM_SUCCESS) {
13135bc9d93dSMark Murray 				syslog(LOG_ERR, "pam_chauthtok: %s", pam_strerror(pamh, e));
13145bc9d93dSMark Murray 				rval = 1;
13155bc9d93dSMark Murray 			}
13165bc9d93dSMark Murray 		} else if (e != PAM_SUCCESS) {
13175bc9d93dSMark Murray 			rval = 1;
13185bc9d93dSMark Murray 		}
13195bc9d93dSMark Murray 	}
13205bc9d93dSMark Murray 
13215bc9d93dSMark Murray 	if (rval != 0) {
13226c9134c0SMark Murray 		if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
13236c9134c0SMark Murray 			syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
13245bc9d93dSMark Murray 		}
13255bc9d93dSMark Murray 		pamh = NULL;
13266c9134c0SMark Murray 	}
13276c9134c0SMark Murray 	return rval;
13286c9134c0SMark Murray }
13296c9134c0SMark Murray 
13305bc9d93dSMark Murray #endif /* USE_PAM */
13316c9134c0SMark Murray 
1332ea022d16SRodney W. Grimes void
1333e4bc453cSWarner Losh pass(char *passwd)
1334ea022d16SRodney W. Grimes {
1335a5a4544eSPaul Traina 	int rval;
1336ea022d16SRodney W. Grimes 	FILE *fd;
1337b071c689SDavid Nugent #ifdef	LOGIN_CAP
1338b071c689SDavid Nugent 	login_cap_t *lc = NULL;
1339b071c689SDavid Nugent #endif
13405bc9d93dSMark Murray #ifdef USE_PAM
13415bc9d93dSMark Murray 	int e;
13425bc9d93dSMark Murray #endif
1343ce9287fcSYaroslav Tykhiy 	char *chrootdir;
1344341e476eSYaroslav Tykhiy 	char *residue = NULL;
134547499ecdSAndrey A. Chernov 	char *xpasswd;
1346ea022d16SRodney W. Grimes 
1347ea022d16SRodney W. Grimes 	if (logged_in || askpasswd == 0) {
1348ea022d16SRodney W. Grimes 		reply(503, "Login with USER first.");
1349ea022d16SRodney W. Grimes 		return;
1350ea022d16SRodney W. Grimes 	}
1351ea022d16SRodney W. Grimes 	askpasswd = 0;
1352ea022d16SRodney W. Grimes 	if (!guest) {		/* "ftp" is only account allowed no password */
1353a5a4544eSPaul Traina 		if (pw == NULL) {
1354a5a4544eSPaul Traina 			rval = 1;	/* failure below */
1355a5a4544eSPaul Traina 			goto skip;
1356a5a4544eSPaul Traina 		}
13575bc9d93dSMark Murray #ifdef USE_PAM
13586c9134c0SMark Murray 		rval = auth_pam(&pw, passwd);
1359f650a124SAndrey A. Chernov 		if (rval >= 0) {
1360f650a124SAndrey A. Chernov 			opieunlock();
1361a5a4544eSPaul Traina 			goto skip;
1362f650a124SAndrey A. Chernov 		}
1363f650a124SAndrey A. Chernov #endif
136447499ecdSAndrey A. Chernov 		if (opieverify(&opiedata, passwd) == 0)
136547499ecdSAndrey A. Chernov 			xpasswd = pw->pw_passwd;
1366f650a124SAndrey A. Chernov 		else if (pwok) {
136747499ecdSAndrey A. Chernov 			xpasswd = crypt(passwd, pw->pw_passwd);
1368f650a124SAndrey A. Chernov 			if (passwd[0] == '\0' && pw->pw_passwd[0] != '\0')
1369f650a124SAndrey A. Chernov 				xpasswd = ":";
1370f650a124SAndrey A. Chernov 		} else {
137147499ecdSAndrey A. Chernov 			rval = 1;
137247499ecdSAndrey A. Chernov 			goto skip;
137347499ecdSAndrey A. Chernov 		}
137447499ecdSAndrey A. Chernov 		rval = strcmp(pw->pw_passwd, xpasswd);
1375f650a124SAndrey A. Chernov 		if (pw->pw_expire && time(NULL) >= pw->pw_expire)
1376a5a4544eSPaul Traina 			rval = 1;	/* failure */
1377a5a4544eSPaul Traina skip:
1378a5a4544eSPaul Traina 		/*
1379a5a4544eSPaul Traina 		 * If rval == 1, the user failed the authentication check
13806c9134c0SMark Murray 		 * above.  If rval == 0, either PAM or local authentication
1381a5a4544eSPaul Traina 		 * succeeded.
1382a5a4544eSPaul Traina 		 */
1383a5a4544eSPaul Traina 		if (rval) {
1384ea022d16SRodney W. Grimes 			reply(530, "Login incorrect.");
1385b8939f6fSYaroslav Tykhiy 			if (logging) {
1386ea022d16SRodney W. Grimes 				syslog(LOG_NOTICE,
1387b8939f6fSYaroslav Tykhiy 				    "FTP LOGIN FAILED FROM %s",
1388b8939f6fSYaroslav Tykhiy 				    remotehost);
1389b8939f6fSYaroslav Tykhiy 				syslog(LOG_AUTHPRIV | LOG_NOTICE,
1390ea022d16SRodney W. Grimes 				    "FTP LOGIN FAILED FROM %s, %s",
1391ea022d16SRodney W. Grimes 				    remotehost, curname);
1392b8939f6fSYaroslav Tykhiy 			}
1393ea022d16SRodney W. Grimes 			pw = NULL;
1394ea022d16SRodney W. Grimes 			if (login_attempts++ >= 5) {
1395ea022d16SRodney W. Grimes 				syslog(LOG_NOTICE,
1396ea022d16SRodney W. Grimes 				    "repeated login failures from %s",
1397ea022d16SRodney W. Grimes 				    remotehost);
1398ea022d16SRodney W. Grimes 				exit(0);
1399ea022d16SRodney W. Grimes 			}
1400ea022d16SRodney W. Grimes 			return;
1401ea022d16SRodney W. Grimes 		}
1402ea022d16SRodney W. Grimes 	}
1403ea022d16SRodney W. Grimes 	login_attempts = 0;		/* this time successful */
1404ea022d16SRodney W. Grimes 	if (setegid((gid_t)pw->pw_gid) < 0) {
1405ea022d16SRodney W. Grimes 		reply(550, "Can't set gid.");
1406ea022d16SRodney W. Grimes 		return;
1407ea022d16SRodney W. Grimes 	}
1408b071c689SDavid Nugent 	/* May be overridden by login.conf */
1409b071c689SDavid Nugent 	(void) umask(defumask);
1410b071c689SDavid Nugent #ifdef	LOGIN_CAP
14115d0bfe39SDavid Nugent 	if ((lc = login_getpwclass(pw)) != NULL) {
1412b071c689SDavid Nugent 		char	remote_ip[MAXHOSTNAMELEN];
1413b071c689SDavid Nugent 
14144dd8b5abSYoshinobu Inoue 		getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
14154dd8b5abSYoshinobu Inoue 			remote_ip, sizeof(remote_ip) - 1, NULL, 0,
1416b0f06defSHajimu UMEMOTO 			NI_NUMERICHOST);
1417b071c689SDavid Nugent 		remote_ip[sizeof(remote_ip) - 1] = 0;
1418b071c689SDavid Nugent 		if (!auth_hostok(lc, remotehost, remote_ip)) {
1419b071c689SDavid Nugent 			syslog(LOG_INFO|LOG_AUTH,
1420b071c689SDavid Nugent 			    "FTP LOGIN FAILED (HOST) as %s: permission denied.",
1421b071c689SDavid Nugent 			    pw->pw_name);
1422b071c689SDavid Nugent 			reply(530, "Permission denied.\n");
1423b071c689SDavid Nugent 			pw = NULL;
1424b071c689SDavid Nugent 			return;
1425b071c689SDavid Nugent 		}
1426b071c689SDavid Nugent 		if (!auth_timeok(lc, time(NULL))) {
1427b071c689SDavid Nugent 			reply(530, "Login not available right now.\n");
1428b071c689SDavid Nugent 			pw = NULL;
1429b071c689SDavid Nugent 			return;
1430b071c689SDavid Nugent 		}
1431b071c689SDavid Nugent 	}
1432b071c689SDavid Nugent 	setusercontext(lc, pw, (uid_t)0,
1433e6fa0d43SDag-Erling Smørgrav 		LOGIN_SETLOGIN|LOGIN_SETGROUP|LOGIN_SETPRIORITY|
1434d9e2c424SRobert Watson 		LOGIN_SETRESOURCES|LOGIN_SETUMASK|LOGIN_SETMAC);
1435b071c689SDavid Nugent #else
1436e6fa0d43SDag-Erling Smørgrav 	setlogin(pw->pw_name);
1437ea022d16SRodney W. Grimes 	(void) initgroups(pw->pw_name, pw->pw_gid);
1438b071c689SDavid Nugent #endif
1439ea022d16SRodney W. Grimes 
14405bc9d93dSMark Murray #ifdef USE_PAM
14415bc9d93dSMark Murray 	if (pamh) {
14425bc9d93dSMark Murray 		if ((e = pam_open_session(pamh, 0)) != PAM_SUCCESS) {
14435bc9d93dSMark Murray 			syslog(LOG_ERR, "pam_open_session: %s", pam_strerror(pamh, e));
14445bc9d93dSMark Murray 		} else if ((e = pam_setcred(pamh, PAM_ESTABLISH_CRED)) != PAM_SUCCESS) {
14455bc9d93dSMark Murray 			syslog(LOG_ERR, "pam_setcred: %s", pam_strerror(pamh, e));
14465bc9d93dSMark Murray 		}
14475bc9d93dSMark Murray 	}
14485bc9d93dSMark Murray #endif
14495bc9d93dSMark Murray 
1450ea022d16SRodney W. Grimes 	/* open wtmp before chroot */
14515d7e0128SYaroslav Tykhiy 	if (dowtmp)
14525d7e0128SYaroslav Tykhiy 		ftpd_logwtmp(ttyline, pw->pw_name,
14535d7e0128SYaroslav Tykhiy 		    (struct sockaddr *)&his_addr);
1454ea022d16SRodney W. Grimes 	logged_in = 1;
1455ea022d16SRodney W. Grimes 
1456a5a4544eSPaul Traina 	if (guest && stats && statfd < 0)
1457ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
145863047c6fSDavid E. O'Brien 		statfd = open(thishost->statfile, O_WRONLY|O_APPEND);
1459ea4e54b9SDavid Nugent #else
146063047c6fSDavid E. O'Brien 		statfd = open(_PATH_FTPDSTATFILE, O_WRONLY|O_APPEND);
1461ea4e54b9SDavid Nugent #endif
146263047c6fSDavid E. O'Brien 		if (statfd < 0)
14633eb568f2SGuido van Rooij 			stats = 0;
14643eb568f2SGuido van Rooij 
1465b071c689SDavid Nugent 	dochroot =
1466341e476eSYaroslav Tykhiy 		checkuser(_PATH_FTPCHROOT, pw->pw_name, 1, &residue)
1467b071c689SDavid Nugent #ifdef	LOGIN_CAP	/* Allow login.conf configuration as well */
14688657b576SYaroslav Tykhiy 		|| login_getcapbool(lc, "ftp-chroot", 0)
1469b071c689SDavid Nugent #endif
14708657b576SYaroslav Tykhiy 	;
1471ce9287fcSYaroslav Tykhiy 	chrootdir = NULL;
1472ea022d16SRodney W. Grimes 	/*
1473ce9287fcSYaroslav Tykhiy 	 * For a chrooted local user,
1474ce9287fcSYaroslav Tykhiy 	 * a) see whether ftpchroot(5) specifies a chroot directory,
1475ce9287fcSYaroslav Tykhiy 	 * b) extract the directory pathname from the line,
1476ce9287fcSYaroslav Tykhiy 	 * c) expand it to the absolute pathname if necessary.
1477ea022d16SRodney W. Grimes 	 */
1478ce9287fcSYaroslav Tykhiy 	if (dochroot && residue &&
147939bce482SYaroslav Tykhiy 	    (chrootdir = strtok(residue, " \t")) != NULL) {
148039bce482SYaroslav Tykhiy 		if (chrootdir[0] != '/')
1481341e476eSYaroslav Tykhiy 			asprintf(&chrootdir, "%s/%s", pw->pw_dir, chrootdir);
148239bce482SYaroslav Tykhiy 		else
148339bce482SYaroslav Tykhiy 			chrootdir = strdup(chrootdir); /* so it can be freed */
1484341e476eSYaroslav Tykhiy 		if (chrootdir == NULL)
14858657b576SYaroslav Tykhiy 			fatalerror("Ran out of memory.");
14868657b576SYaroslav Tykhiy 	}
1487ce9287fcSYaroslav Tykhiy 	if (guest || dochroot) {
1488ce9287fcSYaroslav Tykhiy 		/*
1489ce9287fcSYaroslav Tykhiy 		 * If no chroot directory set yet, use the login directory.
1490ce9287fcSYaroslav Tykhiy 		 * Copy it so it can be modified while pw->pw_dir stays intact.
1491ce9287fcSYaroslav Tykhiy 		 */
1492ce9287fcSYaroslav Tykhiy 		if (chrootdir == NULL &&
1493ce9287fcSYaroslav Tykhiy 		    (chrootdir = strdup(pw->pw_dir)) == NULL)
1494ce9287fcSYaroslav Tykhiy 			fatalerror("Ran out of memory.");
1495ce9287fcSYaroslav Tykhiy 		/*
1496ce9287fcSYaroslav Tykhiy 		 * Check for the "/chroot/./home" syntax,
1497ce9287fcSYaroslav Tykhiy 		 * separate the chroot and home directory pathnames.
1498ce9287fcSYaroslav Tykhiy 		 */
1499ce9287fcSYaroslav Tykhiy 		if ((homedir = strstr(chrootdir, "/./")) != NULL) {
1500ce9287fcSYaroslav Tykhiy 			*(homedir++) = '\0';	/* wipe '/' */
1501ce9287fcSYaroslav Tykhiy 			homedir++;		/* skip '.' */
1502ce9287fcSYaroslav Tykhiy 			/* so chrootdir can be freed later */
1503ce9287fcSYaroslav Tykhiy 			if ((homedir = strdup(homedir)) == NULL)
1504ce9287fcSYaroslav Tykhiy 				fatalerror("Ran out of memory.");
1505ce9287fcSYaroslav Tykhiy 		} else {
1506ce9287fcSYaroslav Tykhiy 			/*
1507ce9287fcSYaroslav Tykhiy 			 * We MUST do a chdir() after the chroot. Otherwise
1508ce9287fcSYaroslav Tykhiy 			 * the old current directory will be accessible as "."
1509ce9287fcSYaroslav Tykhiy 			 * outside the new root!
1510ce9287fcSYaroslav Tykhiy 			 */
1511ce9287fcSYaroslav Tykhiy 			homedir = "/";
1512ce9287fcSYaroslav Tykhiy 		}
1513ce9287fcSYaroslav Tykhiy 		/*
1514ce9287fcSYaroslav Tykhiy 		 * Finally, do chroot()
1515ce9287fcSYaroslav Tykhiy 		 */
1516ce9287fcSYaroslav Tykhiy 		if (chroot(chrootdir) < 0) {
1517a5a4544eSPaul Traina 			reply(550, "Can't change root.");
1518a5a4544eSPaul Traina 			goto bad;
1519a5a4544eSPaul Traina 		}
1520ce9287fcSYaroslav Tykhiy 	} else	/* real user w/o chroot */
1521ce9287fcSYaroslav Tykhiy 		homedir = pw->pw_dir;
1522ce9287fcSYaroslav Tykhiy 	/*
1523ce9287fcSYaroslav Tykhiy 	 * Set euid *before* doing chdir() so
1524ce9287fcSYaroslav Tykhiy 	 * a) the user won't be carried to a directory that he couldn't reach
1525ce9287fcSYaroslav Tykhiy 	 *    on his own due to no permission to upper path components,
1526ce9287fcSYaroslav Tykhiy 	 * b) NFS mounted homedirs w/restrictive permissions will be accessible
1527ce9287fcSYaroslav Tykhiy 	 *    (uid 0 has no root power over NFS if not mapped explicitly.)
1528ce9287fcSYaroslav Tykhiy 	 */
1529ea022d16SRodney W. Grimes 	if (seteuid((uid_t)pw->pw_uid) < 0) {
1530ea022d16SRodney W. Grimes 		reply(550, "Can't set uid.");
1531ea022d16SRodney W. Grimes 		goto bad;
1532ea022d16SRodney W. Grimes 	}
1533ce9287fcSYaroslav Tykhiy 	if (chdir(homedir) < 0) {
1534ce9287fcSYaroslav Tykhiy 		if (guest || dochroot) {
1535ce9287fcSYaroslav Tykhiy 			reply(550, "Can't change to base directory.");
1536ce9287fcSYaroslav Tykhiy 			goto bad;
1537ce9287fcSYaroslav Tykhiy 		} else {
1538ce9287fcSYaroslav Tykhiy 			if (chdir("/") < 0) {
1539ce9287fcSYaroslav Tykhiy 				reply(550, "Root is inaccessible.");
1540ce9287fcSYaroslav Tykhiy 				goto bad;
1541ce9287fcSYaroslav Tykhiy 			}
1542ce9287fcSYaroslav Tykhiy 			lreply(230, "No directory! Logging in with home=/");
1543ce9287fcSYaroslav Tykhiy 		}
1544ce9287fcSYaroslav Tykhiy 	}
154582c76939SDavid Greenman 
154682c76939SDavid Greenman 	/*
1547ea022d16SRodney W. Grimes 	 * Display a login message, if it exists.
1548ea022d16SRodney W. Grimes 	 * N.B. reply(230,) must follow the message.
1549ea022d16SRodney W. Grimes 	 */
1550ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
155163047c6fSDavid E. O'Brien 	fd = fopen(thishost->loginmsg, "r");
1552ea4e54b9SDavid Nugent #else
155363047c6fSDavid E. O'Brien 	fd = fopen(_PATH_FTPLOGINMESG, "r");
1554ea4e54b9SDavid Nugent #endif
155563047c6fSDavid E. O'Brien 	if (fd != NULL) {
1556ea022d16SRodney W. Grimes 		char *cp, line[LINE_MAX];
1557ea022d16SRodney W. Grimes 
1558ea022d16SRodney W. Grimes 		while (fgets(line, sizeof(line), fd) != NULL) {
1559ea022d16SRodney W. Grimes 			if ((cp = strchr(line, '\n')) != NULL)
1560ea022d16SRodney W. Grimes 				*cp = '\0';
1561ea022d16SRodney W. Grimes 			lreply(230, "%s", line);
1562ea022d16SRodney W. Grimes 		}
1563ea022d16SRodney W. Grimes 		(void) fflush(stdout);
1564ea022d16SRodney W. Grimes 		(void) fclose(fd);
1565ea022d16SRodney W. Grimes 	}
1566ea022d16SRodney W. Grimes 	if (guest) {
15673eb568f2SGuido van Rooij 		if (ident != NULL)
15683eb568f2SGuido van Rooij 			free(ident);
156961f891a6SPaul Traina 		ident = strdup(passwd);
157061f891a6SPaul Traina 		if (ident == NULL)
1571618b0bbaSMark Murray 			fatalerror("Ran out of memory.");
157261f891a6SPaul Traina 
1573ea022d16SRodney W. Grimes 		reply(230, "Guest login ok, access restrictions apply.");
1574ea022d16SRodney W. Grimes #ifdef SETPROCTITLE
1575ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
1576ea4e54b9SDavid Nugent 		if (thishost != firsthost)
1577ea4e54b9SDavid Nugent 			snprintf(proctitle, sizeof(proctitle),
1578b3a0a7cdSMike Heffner 				 "%s: anonymous(%s)/%s", remotehost, hostname,
1579b3a0a7cdSMike Heffner 				 passwd);
1580ea4e54b9SDavid Nugent 		else
1581ea4e54b9SDavid Nugent #endif
1582ea022d16SRodney W. Grimes 			snprintf(proctitle, sizeof(proctitle),
1583b3a0a7cdSMike Heffner 				 "%s: anonymous/%s", remotehost, passwd);
1584b63e1fe2SPeter Wemm 		setproctitle("%s", proctitle);
1585ea022d16SRodney W. Grimes #endif /* SETPROCTITLE */
1586ea022d16SRodney W. Grimes 		if (logging)
1587ea022d16SRodney W. Grimes 			syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s",
1588ea022d16SRodney W. Grimes 			    remotehost, passwd);
1589ea022d16SRodney W. Grimes 	} else {
15903401a71fSDaniel O'Callaghan 		if (dochroot)
159111342ab1SYaroslav Tykhiy 			reply(230, "User %s logged in, "
159211342ab1SYaroslav Tykhiy 				   "access restrictions apply.", pw->pw_name);
15933401a71fSDaniel O'Callaghan 		else
1594ea022d16SRodney W. Grimes 			reply(230, "User %s logged in.", pw->pw_name);
15953401a71fSDaniel O'Callaghan 
1596ea022d16SRodney W. Grimes #ifdef SETPROCTITLE
1597ea022d16SRodney W. Grimes 		snprintf(proctitle, sizeof(proctitle),
15987a29d7daSYaroslav Tykhiy 			 "%s: user/%s", remotehost, pw->pw_name);
1599b63e1fe2SPeter Wemm 		setproctitle("%s", proctitle);
1600ea022d16SRodney W. Grimes #endif /* SETPROCTITLE */
1601ea022d16SRodney W. Grimes 		if (logging)
1602ea022d16SRodney W. Grimes 			syslog(LOG_INFO, "FTP LOGIN FROM %s as %s",
1603ea022d16SRodney W. Grimes 			    remotehost, pw->pw_name);
1604ea022d16SRodney W. Grimes 	}
1605b071c689SDavid Nugent #ifdef	LOGIN_CAP
1606b071c689SDavid Nugent 	login_close(lc);
1607b071c689SDavid Nugent #endif
1608ce9287fcSYaroslav Tykhiy 	if (chrootdir)
1609ce9287fcSYaroslav Tykhiy 		free(chrootdir);
1610ce9287fcSYaroslav Tykhiy 	if (residue)
1611ce9287fcSYaroslav Tykhiy 		free(residue);
1612ea022d16SRodney W. Grimes 	return;
1613ea022d16SRodney W. Grimes bad:
1614ea022d16SRodney W. Grimes 	/* Forget all about it... */
1615b071c689SDavid Nugent #ifdef	LOGIN_CAP
1616b071c689SDavid Nugent 	login_close(lc);
1617b071c689SDavid Nugent #endif
1618ce9287fcSYaroslav Tykhiy 	if (chrootdir)
1619ce9287fcSYaroslav Tykhiy 		free(chrootdir);
1620ce9287fcSYaroslav Tykhiy 	if (residue)
1621ce9287fcSYaroslav Tykhiy 		free(residue);
1622ea022d16SRodney W. Grimes 	end_login();
1623ea022d16SRodney W. Grimes }
1624ea022d16SRodney W. Grimes 
1625ea022d16SRodney W. Grimes void
1626e4bc453cSWarner Losh retrieve(char *cmd, char *name)
1627ea022d16SRodney W. Grimes {
1628ea022d16SRodney W. Grimes 	FILE *fin, *dout;
1629ea022d16SRodney W. Grimes 	struct stat st;
1630e4bc453cSWarner Losh 	int (*closefunc)(FILE *);
1631158a00b2SJohn Birrell 	time_t start;
1632ea022d16SRodney W. Grimes 
1633ea022d16SRodney W. Grimes 	if (cmd == 0) {
1634ea022d16SRodney W. Grimes 		fin = fopen(name, "r"), closefunc = fclose;
1635ea022d16SRodney W. Grimes 		st.st_size = 0;
1636ea022d16SRodney W. Grimes 	} else {
1637ea022d16SRodney W. Grimes 		char line[BUFSIZ];
1638ea022d16SRodney W. Grimes 
1639e760ef2cSWarner Losh 		(void) snprintf(line, sizeof(line), cmd, name), name = line;
1640ea022d16SRodney W. Grimes 		fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose;
1641ea022d16SRodney W. Grimes 		st.st_size = -1;
1642ea022d16SRodney W. Grimes 		st.st_blksize = BUFSIZ;
1643ea022d16SRodney W. Grimes 	}
1644ea022d16SRodney W. Grimes 	if (fin == NULL) {
1645ea022d16SRodney W. Grimes 		if (errno != 0) {
1646ea022d16SRodney W. Grimes 			perror_reply(550, name);
1647ea022d16SRodney W. Grimes 			if (cmd == 0) {
1648ea022d16SRodney W. Grimes 				LOGCMD("get", name);
1649ea022d16SRodney W. Grimes 			}
1650ea022d16SRodney W. Grimes 		}
1651ea022d16SRodney W. Grimes 		return;
1652ea022d16SRodney W. Grimes 	}
1653ea022d16SRodney W. Grimes 	byte_count = -1;
1654ea701226SYaroslav Tykhiy 	if (cmd == 0) {
1655ea701226SYaroslav Tykhiy 		if (fstat(fileno(fin), &st) < 0) {
1656ea701226SYaroslav Tykhiy 			perror_reply(550, name);
1657ea701226SYaroslav Tykhiy 			goto done;
1658ea701226SYaroslav Tykhiy 		}
1659ea701226SYaroslav Tykhiy 		if (!S_ISREG(st.st_mode)) {
166010e89104SYaroslav Tykhiy 			/*
166110e89104SYaroslav Tykhiy 			 * Never sending a raw directory is a workaround
166210e89104SYaroslav Tykhiy 			 * for buggy clients that will attempt to RETR
166310e89104SYaroslav Tykhiy 			 * a directory before listing it, e.g., Mozilla.
166410e89104SYaroslav Tykhiy 			 * Preventing a guest from getting irregular files
166510e89104SYaroslav Tykhiy 			 * is a simple security measure.
166610e89104SYaroslav Tykhiy 			 */
166710e89104SYaroslav Tykhiy 			if (S_ISDIR(st.st_mode) || guest) {
1668ea022d16SRodney W. Grimes 				reply(550, "%s: not a plain file.", name);
1669ea022d16SRodney W. Grimes 				goto done;
1670ea022d16SRodney W. Grimes 			}
1671ea701226SYaroslav Tykhiy 			st.st_size = -1;
1672ea701226SYaroslav Tykhiy 			/* st.st_blksize is set for all descriptor types */
1673ea701226SYaroslav Tykhiy 		}
1674ea701226SYaroslav Tykhiy 	}
1675ea022d16SRodney W. Grimes 	if (restart_point) {
1676ea022d16SRodney W. Grimes 		if (type == TYPE_A) {
1677ea022d16SRodney W. Grimes 			off_t i, n;
1678ea022d16SRodney W. Grimes 			int c;
1679ea022d16SRodney W. Grimes 
1680ea022d16SRodney W. Grimes 			n = restart_point;
1681ea022d16SRodney W. Grimes 			i = 0;
1682ea022d16SRodney W. Grimes 			while (i++ < n) {
1683ea022d16SRodney W. Grimes 				if ((c=getc(fin)) == EOF) {
1684ea022d16SRodney W. Grimes 					perror_reply(550, name);
1685ea022d16SRodney W. Grimes 					goto done;
1686ea022d16SRodney W. Grimes 				}
1687ea022d16SRodney W. Grimes 				if (c == '\n')
1688ea022d16SRodney W. Grimes 					i++;
1689ea022d16SRodney W. Grimes 			}
1690ea022d16SRodney W. Grimes 		} else if (lseek(fileno(fin), restart_point, L_SET) < 0) {
1691ea022d16SRodney W. Grimes 			perror_reply(550, name);
1692ea022d16SRodney W. Grimes 			goto done;
1693ea022d16SRodney W. Grimes 		}
1694ea022d16SRodney W. Grimes 	}
1695ea022d16SRodney W. Grimes 	dout = dataconn(name, st.st_size, "w");
1696ea022d16SRodney W. Grimes 	if (dout == NULL)
1697ea022d16SRodney W. Grimes 		goto done;
16983eb568f2SGuido van Rooij 	time(&start);
16999fc5823aSGarrett Wollman 	send_data(fin, dout, st.st_blksize, st.st_size,
17009fc5823aSGarrett Wollman 		  restart_point == 0 && cmd == 0 && S_ISREG(st.st_mode));
17013eb568f2SGuido van Rooij 	if (cmd == 0 && guest && stats)
17023eb568f2SGuido van Rooij 		logxfer(name, st.st_size, start);
1703ea022d16SRodney W. Grimes 	(void) fclose(dout);
1704ea022d16SRodney W. Grimes 	data = -1;
1705ea022d16SRodney W. Grimes 	pdata = -1;
1706ea022d16SRodney W. Grimes done:
1707ea022d16SRodney W. Grimes 	if (cmd == 0)
1708ea022d16SRodney W. Grimes 		LOGBYTES("get", name, byte_count);
1709ea022d16SRodney W. Grimes 	(*closefunc)(fin);
1710ea022d16SRodney W. Grimes }
1711ea022d16SRodney W. Grimes 
1712ea022d16SRodney W. Grimes void
1713e4bc453cSWarner Losh store(char *name, char *mode, int unique)
1714ea022d16SRodney W. Grimes {
1715a117c345SYaroslav Tykhiy 	int fd;
1716ea022d16SRodney W. Grimes 	FILE *fout, *din;
1717e4bc453cSWarner Losh 	int (*closefunc)(FILE *);
1718ea022d16SRodney W. Grimes 
1719a117c345SYaroslav Tykhiy 	if (*mode == 'a') {		/* APPE */
1720a117c345SYaroslav Tykhiy 		if (unique) {
1721a117c345SYaroslav Tykhiy 			/* Programming error */
1722a117c345SYaroslav Tykhiy 			syslog(LOG_ERR, "Internal: unique flag to APPE");
1723a117c345SYaroslav Tykhiy 			unique = 0;
1724a117c345SYaroslav Tykhiy 		}
1725a117c345SYaroslav Tykhiy 		if (guest && noguestmod) {
1726a117c345SYaroslav Tykhiy 			reply(550, "Appending to existing file denied");
1727a117c345SYaroslav Tykhiy 			goto err;
1728a117c345SYaroslav Tykhiy 		}
1729a117c345SYaroslav Tykhiy 		restart_point = 0;	/* not affected by preceding REST */
1730a117c345SYaroslav Tykhiy 	}
1731a117c345SYaroslav Tykhiy 	if (unique)			/* STOU overrides REST */
1732a117c345SYaroslav Tykhiy 		restart_point = 0;
1733a117c345SYaroslav Tykhiy 	if (guest && noguestmod) {
1734a117c345SYaroslav Tykhiy 		if (restart_point) {	/* guest STOR w/REST */
1735a117c345SYaroslav Tykhiy 			reply(550, "Modifying existing file denied");
1736a117c345SYaroslav Tykhiy 			goto err;
1737a117c345SYaroslav Tykhiy 		} else			/* treat guest STOR as STOU */
1738a117c345SYaroslav Tykhiy 			unique = 1;
1739ea022d16SRodney W. Grimes 	}
1740ea022d16SRodney W. Grimes 
1741ea022d16SRodney W. Grimes 	if (restart_point)
1742a117c345SYaroslav Tykhiy 		mode = "r+";	/* so ASCII manual seek can work */
1743a117c345SYaroslav Tykhiy 	if (unique) {
1744a117c345SYaroslav Tykhiy 		if ((fd = guniquefd(name, &name)) < 0)
1745a117c345SYaroslav Tykhiy 			goto err;
1746a117c345SYaroslav Tykhiy 		fout = fdopen(fd, mode);
1747a117c345SYaroslav Tykhiy 	} else
1748ea022d16SRodney W. Grimes 		fout = fopen(name, mode);
1749ea022d16SRodney W. Grimes 	closefunc = fclose;
1750ea022d16SRodney W. Grimes 	if (fout == NULL) {
1751ea022d16SRodney W. Grimes 		perror_reply(553, name);
1752a117c345SYaroslav Tykhiy 		goto err;
1753ea022d16SRodney W. Grimes 	}
1754ea022d16SRodney W. Grimes 	byte_count = -1;
1755ea022d16SRodney W. Grimes 	if (restart_point) {
1756ea022d16SRodney W. Grimes 		if (type == TYPE_A) {
1757ea022d16SRodney W. Grimes 			off_t i, n;
1758ea022d16SRodney W. Grimes 			int c;
1759ea022d16SRodney W. Grimes 
1760ea022d16SRodney W. Grimes 			n = restart_point;
1761ea022d16SRodney W. Grimes 			i = 0;
1762ea022d16SRodney W. Grimes 			while (i++ < n) {
1763ea022d16SRodney W. Grimes 				if ((c=getc(fout)) == EOF) {
1764ea022d16SRodney W. Grimes 					perror_reply(550, name);
1765ea022d16SRodney W. Grimes 					goto done;
1766ea022d16SRodney W. Grimes 				}
1767ea022d16SRodney W. Grimes 				if (c == '\n')
1768ea022d16SRodney W. Grimes 					i++;
1769ea022d16SRodney W. Grimes 			}
1770ea022d16SRodney W. Grimes 			/*
1771ea022d16SRodney W. Grimes 			 * We must do this seek to "current" position
1772ea022d16SRodney W. Grimes 			 * because we are changing from reading to
1773ea022d16SRodney W. Grimes 			 * writing.
1774ea022d16SRodney W. Grimes 			 */
1775e4a71114SAndrey A. Chernov 			if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1776ea022d16SRodney W. Grimes 				perror_reply(550, name);
1777ea022d16SRodney W. Grimes 				goto done;
1778ea022d16SRodney W. Grimes 			}
1779ea022d16SRodney W. Grimes 		} else if (lseek(fileno(fout), restart_point, L_SET) < 0) {
1780ea022d16SRodney W. Grimes 			perror_reply(550, name);
1781ea022d16SRodney W. Grimes 			goto done;
1782ea022d16SRodney W. Grimes 		}
1783ea022d16SRodney W. Grimes 	}
1784ea022d16SRodney W. Grimes 	din = dataconn(name, (off_t)-1, "r");
1785ea022d16SRodney W. Grimes 	if (din == NULL)
1786ea022d16SRodney W. Grimes 		goto done;
1787ea022d16SRodney W. Grimes 	if (receive_data(din, fout) == 0) {
1788ea022d16SRodney W. Grimes 		if (unique)
1789ea022d16SRodney W. Grimes 			reply(226, "Transfer complete (unique file name:%s).",
1790ea022d16SRodney W. Grimes 			    name);
1791ea022d16SRodney W. Grimes 		else
1792ea022d16SRodney W. Grimes 			reply(226, "Transfer complete.");
1793ea022d16SRodney W. Grimes 	}
1794ea022d16SRodney W. Grimes 	(void) fclose(din);
1795ea022d16SRodney W. Grimes 	data = -1;
1796ea022d16SRodney W. Grimes 	pdata = -1;
1797ea022d16SRodney W. Grimes done:
17987c20f337SYaroslav Tykhiy 	LOGBYTES(*mode == 'a' ? "append" : "put", name, byte_count);
1799ea022d16SRodney W. Grimes 	(*closefunc)(fout);
1800a117c345SYaroslav Tykhiy 	return;
1801a117c345SYaroslav Tykhiy err:
1802a117c345SYaroslav Tykhiy 	LOGCMD(*mode == 'a' ? "append" : "put" , name);
1803a117c345SYaroslav Tykhiy 	return;
1804ea022d16SRodney W. Grimes }
1805ea022d16SRodney W. Grimes 
1806ea022d16SRodney W. Grimes static FILE *
1807e4bc453cSWarner Losh getdatasock(char *mode)
1808ea022d16SRodney W. Grimes {
1809ea022d16SRodney W. Grimes 	int on = 1, s, t, tries;
1810ea022d16SRodney W. Grimes 
1811ea022d16SRodney W. Grimes 	if (data >= 0)
1812ea022d16SRodney W. Grimes 		return (fdopen(data, mode));
18134dd8b5abSYoshinobu Inoue 
18144dd8b5abSYoshinobu Inoue 	s = socket(data_dest.su_family, SOCK_STREAM, 0);
1815ea022d16SRodney W. Grimes 	if (s < 0)
1816ea022d16SRodney W. Grimes 		goto bad;
181757d4ef07SYaroslav Tykhiy 	if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
1818406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "data setsockopt (SO_REUSEADDR): %m");
1819ea022d16SRodney W. Grimes 	/* anchor socket to avoid multi-homing problems */
18204dd8b5abSYoshinobu Inoue 	data_source = ctrl_addr;
182163591ba5SYaroslav Tykhiy 	data_source.su_port = htons(dataport);
18226c124a84SYaroslav Tykhiy 	(void) seteuid((uid_t)0);
1823ea022d16SRodney W. Grimes 	for (tries = 1; ; tries++) {
18249ec7612aSYaroslav Tykhiy 		/*
18259ec7612aSYaroslav Tykhiy 		 * We should loop here since it's possible that
18269ec7612aSYaroslav Tykhiy 		 * another ftpd instance has passed this point and is
18279ec7612aSYaroslav Tykhiy 		 * trying to open a data connection in active mode now.
18289ec7612aSYaroslav Tykhiy 		 * Until the other connection is opened, we'll be getting
18299ec7612aSYaroslav Tykhiy 		 * EADDRINUSE because no SOCK_STREAM sockets in the system
18309ec7612aSYaroslav Tykhiy 		 * can share both local and remote addresses, localIP:20
18319ec7612aSYaroslav Tykhiy 		 * and *:* in this case.
18329ec7612aSYaroslav Tykhiy 		 */
1833ea022d16SRodney W. Grimes 		if (bind(s, (struct sockaddr *)&data_source,
18344dd8b5abSYoshinobu Inoue 		    data_source.su_len) >= 0)
1835ea022d16SRodney W. Grimes 			break;
1836ea022d16SRodney W. Grimes 		if (errno != EADDRINUSE || tries > 10)
1837ea022d16SRodney W. Grimes 			goto bad;
1838ea022d16SRodney W. Grimes 		sleep(tries);
1839ea022d16SRodney W. Grimes 	}
1840ea022d16SRodney W. Grimes 	(void) seteuid((uid_t)pw->pw_uid);
1841ea022d16SRodney W. Grimes #ifdef IP_TOS
18424dd8b5abSYoshinobu Inoue 	if (data_source.su_family == AF_INET)
18434dd8b5abSYoshinobu Inoue       {
1844ea022d16SRodney W. Grimes 	on = IPTOS_THROUGHPUT;
184557d4ef07SYaroslav Tykhiy 	if (setsockopt(s, IPPROTO_IP, IP_TOS, &on, sizeof(int)) < 0)
1846406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "data setsockopt (IP_TOS): %m");
18474dd8b5abSYoshinobu Inoue       }
1848ea022d16SRodney W. Grimes #endif
18499fc5823aSGarrett Wollman #ifdef TCP_NOPUSH
18509fc5823aSGarrett Wollman 	/*
18519fc5823aSGarrett Wollman 	 * Turn off push flag to keep sender TCP from sending short packets
18529fc5823aSGarrett Wollman 	 * at the boundaries of each write().  Should probably do a SO_SNDBUF
18539fc5823aSGarrett Wollman 	 * to set the send buffer size as well, but that may not be desirable
18549fc5823aSGarrett Wollman 	 * in heavy-load situations.
18559fc5823aSGarrett Wollman 	 */
18569fc5823aSGarrett Wollman 	on = 1;
185757d4ef07SYaroslav Tykhiy 	if (setsockopt(s, IPPROTO_TCP, TCP_NOPUSH, &on, sizeof on) < 0)
1858406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "data setsockopt (TCP_NOPUSH): %m");
18599fc5823aSGarrett Wollman #endif
18609fc5823aSGarrett Wollman #ifdef SO_SNDBUF
18619fc5823aSGarrett Wollman 	on = 65536;
186257d4ef07SYaroslav Tykhiy 	if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &on, sizeof on) < 0)
1863406d1ae9SYaroslav Tykhiy 		syslog(LOG_WARNING, "data setsockopt (SO_SNDBUF): %m");
18649fc5823aSGarrett Wollman #endif
18659fc5823aSGarrett Wollman 
1866ea022d16SRodney W. Grimes 	return (fdopen(s, mode));
1867ea022d16SRodney W. Grimes bad:
1868ea022d16SRodney W. Grimes 	/* Return the real value of errno (close may change it) */
1869ea022d16SRodney W. Grimes 	t = errno;
1870ea022d16SRodney W. Grimes 	(void) seteuid((uid_t)pw->pw_uid);
1871ea022d16SRodney W. Grimes 	(void) close(s);
1872ea022d16SRodney W. Grimes 	errno = t;
1873ea022d16SRodney W. Grimes 	return (NULL);
1874ea022d16SRodney W. Grimes }
1875ea022d16SRodney W. Grimes 
1876ea022d16SRodney W. Grimes static FILE *
1877e4bc453cSWarner Losh dataconn(char *name, off_t size, char *mode)
1878ea022d16SRodney W. Grimes {
1879ea022d16SRodney W. Grimes 	char sizebuf[32];
1880ea022d16SRodney W. Grimes 	FILE *file;
1881e5094456SCrist J. Clark 	int retry = 0, tos, conerrno;
1882ea022d16SRodney W. Grimes 
1883ea022d16SRodney W. Grimes 	file_size = size;
1884ea022d16SRodney W. Grimes 	byte_count = 0;
1885ea022d16SRodney W. Grimes 	if (size != (off_t) -1)
1886e760ef2cSWarner Losh 		(void) snprintf(sizebuf, sizeof(sizebuf), " (%qd bytes)", size);
1887ea022d16SRodney W. Grimes 	else
1888e760ef2cSWarner Losh 		*sizebuf = '\0';
1889ea022d16SRodney W. Grimes 	if (pdata >= 0) {
18904dd8b5abSYoshinobu Inoue 		union sockunion from;
18914cd48bacSYaroslav Tykhiy 		int flags;
18924dd8b5abSYoshinobu Inoue 		int s, fromlen = ctrl_addr.su_len;
1893d6ed3c37SGuido van Rooij 		struct timeval timeout;
1894d6ed3c37SGuido van Rooij 		fd_set set;
1895ea022d16SRodney W. Grimes 
1896d6ed3c37SGuido van Rooij 		FD_ZERO(&set);
1897d6ed3c37SGuido van Rooij 		FD_SET(pdata, &set);
1898d6ed3c37SGuido van Rooij 
1899d6ed3c37SGuido van Rooij 		timeout.tv_usec = 0;
1900d6ed3c37SGuido van Rooij 		timeout.tv_sec = 120;
1901d6ed3c37SGuido van Rooij 
19024cd48bacSYaroslav Tykhiy 		/*
19034cd48bacSYaroslav Tykhiy 		 * Granted a socket is in the blocking I/O mode,
19044cd48bacSYaroslav Tykhiy 		 * accept() will block after a successful select()
19054cd48bacSYaroslav Tykhiy 		 * if the selected connection dies in between.
19064cd48bacSYaroslav Tykhiy 		 * Therefore set the non-blocking I/O flag here.
19074cd48bacSYaroslav Tykhiy 		 */
19084cd48bacSYaroslav Tykhiy 		if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
19094cd48bacSYaroslav Tykhiy 		    fcntl(pdata, F_SETFL, flags | O_NONBLOCK) == -1)
19104cd48bacSYaroslav Tykhiy 			goto pdata_err;
19114cd48bacSYaroslav Tykhiy 		if (select(pdata+1, &set, (fd_set *) 0, (fd_set *) 0, &timeout) <= 0 ||
19124cd48bacSYaroslav Tykhiy 		    (s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0)
19134cd48bacSYaroslav Tykhiy 			goto pdata_err;
1914ea022d16SRodney W. Grimes 		(void) close(pdata);
1915ea022d16SRodney W. Grimes 		pdata = s;
19164cd48bacSYaroslav Tykhiy 		/*
1917f6daca0dSYaroslav Tykhiy 		 * Unset the inherited non-blocking I/O flag
1918f6daca0dSYaroslav Tykhiy 		 * on the child socket so stdio can work on it.
19194cd48bacSYaroslav Tykhiy 		 */
19204cd48bacSYaroslav Tykhiy 		if ((flags = fcntl(pdata, F_GETFL, 0)) == -1 ||
19214cd48bacSYaroslav Tykhiy 		    fcntl(pdata, F_SETFL, flags & ~O_NONBLOCK) == -1)
19224cd48bacSYaroslav Tykhiy 			goto pdata_err;
1923ea022d16SRodney W. Grimes #ifdef IP_TOS
19244dd8b5abSYoshinobu Inoue 		if (from.su_family == AF_INET)
19254dd8b5abSYoshinobu Inoue 	      {
1926a5a4544eSPaul Traina 		tos = IPTOS_THROUGHPUT;
192757d4ef07SYaroslav Tykhiy 		if (setsockopt(s, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
1928406d1ae9SYaroslav Tykhiy 			syslog(LOG_WARNING, "pdata setsockopt (IP_TOS): %m");
19294dd8b5abSYoshinobu Inoue 	      }
1930ea022d16SRodney W. Grimes #endif
1931ea022d16SRodney W. Grimes 		reply(150, "Opening %s mode data connection for '%s'%s.",
1932ea022d16SRodney W. Grimes 		     type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
1933ea022d16SRodney W. Grimes 		return (fdopen(pdata, mode));
19344cd48bacSYaroslav Tykhiy pdata_err:
19354cd48bacSYaroslav Tykhiy 		reply(425, "Can't open data connection.");
19364cd48bacSYaroslav Tykhiy 		(void) close(pdata);
19374cd48bacSYaroslav Tykhiy 		pdata = -1;
19384cd48bacSYaroslav Tykhiy 		return (NULL);
1939ea022d16SRodney W. Grimes 	}
1940ea022d16SRodney W. Grimes 	if (data >= 0) {
1941ea022d16SRodney W. Grimes 		reply(125, "Using existing data connection for '%s'%s.",
1942ea022d16SRodney W. Grimes 		    name, sizebuf);
1943ea022d16SRodney W. Grimes 		usedefault = 1;
1944ea022d16SRodney W. Grimes 		return (fdopen(data, mode));
1945ea022d16SRodney W. Grimes 	}
1946ea022d16SRodney W. Grimes 	if (usedefault)
1947ea022d16SRodney W. Grimes 		data_dest = his_addr;
1948ea022d16SRodney W. Grimes 	usedefault = 1;
1949e5094456SCrist J. Clark 	do {
1950ea022d16SRodney W. Grimes 		file = getdatasock(mode);
1951ea022d16SRodney W. Grimes 		if (file == NULL) {
19524dd8b5abSYoshinobu Inoue 			char hostbuf[BUFSIZ], portbuf[BUFSIZ];
19534dd8b5abSYoshinobu Inoue 			getnameinfo((struct sockaddr *)&data_source,
19544dd8b5abSYoshinobu Inoue 				data_source.su_len, hostbuf, sizeof(hostbuf) - 1,
19554dd8b5abSYoshinobu Inoue 				portbuf, sizeof(portbuf),
1956b0f06defSHajimu UMEMOTO 				NI_NUMERICHOST|NI_NUMERICSERV);
19574dd8b5abSYoshinobu Inoue 			reply(425, "Can't create data socket (%s,%s): %s.",
19584dd8b5abSYoshinobu Inoue 				hostbuf, portbuf, strerror(errno));
1959ea022d16SRodney W. Grimes 			return (NULL);
1960ea022d16SRodney W. Grimes 		}
1961ea022d16SRodney W. Grimes 		data = fileno(file);
1962e5094456SCrist J. Clark 		conerrno = 0;
1963e5094456SCrist J. Clark 		if (connect(data, (struct sockaddr *)&data_dest,
1964e5094456SCrist J. Clark 		    data_dest.su_len) == 0)
1965e5094456SCrist J. Clark 			break;
1966e5094456SCrist J. Clark 		conerrno = errno;
1967ea022d16SRodney W. Grimes 		(void) fclose(file);
1968ea022d16SRodney W. Grimes 		data = -1;
1969e5094456SCrist J. Clark 		if (conerrno == EADDRINUSE) {
1970e5094456SCrist J. Clark 			sleep((unsigned) swaitint);
1971e5094456SCrist J. Clark 			retry += swaitint;
1972e5094456SCrist J. Clark 		} else {
1973e5094456SCrist J. Clark 			break;
1974e5094456SCrist J. Clark 		}
1975e5094456SCrist J. Clark 	} while (retry <= swaitmax);
1976e5094456SCrist J. Clark 	if (conerrno != 0) {
1977e5094456SCrist J. Clark 		perror_reply(425, "Can't build data connection");
1978ea022d16SRodney W. Grimes 		return (NULL);
1979ea022d16SRodney W. Grimes 	}
1980ea022d16SRodney W. Grimes 	reply(150, "Opening %s mode data connection for '%s'%s.",
1981ea022d16SRodney W. Grimes 	     type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
1982ea022d16SRodney W. Grimes 	return (file);
1983ea022d16SRodney W. Grimes }
1984ea022d16SRodney W. Grimes 
1985ea022d16SRodney W. Grimes /*
1986ea022d16SRodney W. Grimes  * Tranfer the contents of "instr" to "outstr" peer using the appropriate
19879fc5823aSGarrett Wollman  * encapsulation of the data subject to Mode, Structure, and Type.
1988ea022d16SRodney W. Grimes  *
1989ea022d16SRodney W. Grimes  * NB: Form isn't handled.
1990ea022d16SRodney W. Grimes  */
19914b82fc95SYaroslav Tykhiy static int
1992e4bc453cSWarner Losh send_data(FILE *instr, FILE *outstr, off_t blksize, off_t filesize, int isreg)
1993ea022d16SRodney W. Grimes {
1994db1c2da3SYaroslav Tykhiy 	int c, cp, filefd, netfd;
1995f6f0c4b9SDan Moschuk 	char *buf;
1996f6f0c4b9SDan Moschuk 	off_t cnt;
1997ea022d16SRodney W. Grimes 
1998ea022d16SRodney W. Grimes 	transflag++;
1999ea022d16SRodney W. Grimes 	switch (type) {
2000ea022d16SRodney W. Grimes 
2001ea022d16SRodney W. Grimes 	case TYPE_A:
2002db1c2da3SYaroslav Tykhiy 		cp = '\0';
2003ea022d16SRodney W. Grimes 		while ((c = getc(instr)) != EOF) {
20044b82fc95SYaroslav Tykhiy 			if (recvurg)
20054b82fc95SYaroslav Tykhiy 				goto got_oob;
2006ea022d16SRodney W. Grimes 			byte_count++;
2007db1c2da3SYaroslav Tykhiy 			if (c == '\n' && cp != '\r') {
2008ea022d16SRodney W. Grimes 				if (ferror(outstr))
2009ea022d16SRodney W. Grimes 					goto data_err;
2010ea022d16SRodney W. Grimes 				(void) putc('\r', outstr);
2011ea022d16SRodney W. Grimes 			}
2012ea022d16SRodney W. Grimes 			(void) putc(c, outstr);
2013db1c2da3SYaroslav Tykhiy 			cp = c;
2014ea022d16SRodney W. Grimes 		}
20154b82fc95SYaroslav Tykhiy 		if (recvurg)
20164b82fc95SYaroslav Tykhiy 			goto got_oob;
2017ea022d16SRodney W. Grimes 		fflush(outstr);
2018ea022d16SRodney W. Grimes 		transflag = 0;
2019ea022d16SRodney W. Grimes 		if (ferror(instr))
2020ea022d16SRodney W. Grimes 			goto file_err;
2021ea022d16SRodney W. Grimes 		if (ferror(outstr))
2022ea022d16SRodney W. Grimes 			goto data_err;
2023ea022d16SRodney W. Grimes 		reply(226, "Transfer complete.");
20244b82fc95SYaroslav Tykhiy 		return (0);
2025ea022d16SRodney W. Grimes 
2026ea022d16SRodney W. Grimes 	case TYPE_I:
2027ea022d16SRodney W. Grimes 	case TYPE_L:
20289fc5823aSGarrett Wollman 		/*
20299fc5823aSGarrett Wollman 		 * isreg is only set if we are not doing restart and we
20309fc5823aSGarrett Wollman 		 * are sending a regular file
20319fc5823aSGarrett Wollman 		 */
20329fc5823aSGarrett Wollman 		netfd = fileno(outstr);
20339fc5823aSGarrett Wollman 		filefd = fileno(instr);
20349fc5823aSGarrett Wollman 
2035f6f0c4b9SDan Moschuk 		if (isreg) {
20369fc5823aSGarrett Wollman 
2037f6f0c4b9SDan Moschuk 			off_t offset;
2038f6f0c4b9SDan Moschuk 			int err;
2039f6f0c4b9SDan Moschuk 
2040f6f0c4b9SDan Moschuk 			err = cnt = offset = 0;
2041f6f0c4b9SDan Moschuk 
2042492f1d9cSMaxim Konovalov 			while (err != -1 && filesize > 0) {
2043492f1d9cSMaxim Konovalov 				err = sendfile(filefd, netfd, offset, 0,
2044f6f0c4b9SDan Moschuk 					(struct sf_hdtr *) NULL, &cnt, 0);
20453af48c42SMaxim Konovalov 				/*
20463af48c42SMaxim Konovalov 				 * Calculate byte_count before OOB processing.
20473af48c42SMaxim Konovalov 				 * It can be used in myoob() later.
20483af48c42SMaxim Konovalov 				 */
20493af48c42SMaxim Konovalov 				byte_count += cnt;
20504b82fc95SYaroslav Tykhiy 				if (recvurg)
20514b82fc95SYaroslav Tykhiy 					goto got_oob;
2052f6f0c4b9SDan Moschuk 				offset += cnt;
2053492f1d9cSMaxim Konovalov 				filesize -= cnt;
2054f6f0c4b9SDan Moschuk 
2055f6f0c4b9SDan Moschuk 				if (err == -1) {
2056f6f0c4b9SDan Moschuk 					if (!cnt)
2057f6f0c4b9SDan Moschuk 						goto oldway;
2058f6f0c4b9SDan Moschuk 
20599fc5823aSGarrett Wollman 					goto data_err;
2060f6f0c4b9SDan Moschuk 				}
2061f6f0c4b9SDan Moschuk 			}
2062f6f0c4b9SDan Moschuk 
20630849c184SDan Moschuk 			transflag = 0;
20649fc5823aSGarrett Wollman 			reply(226, "Transfer complete.");
20654b82fc95SYaroslav Tykhiy 			return (0);
20669fc5823aSGarrett Wollman 		}
20679fc5823aSGarrett Wollman 
20689fc5823aSGarrett Wollman oldway:
2069ea022d16SRodney W. Grimes 		if ((buf = malloc((u_int)blksize)) == NULL) {
2070ea022d16SRodney W. Grimes 			transflag = 0;
2071ea022d16SRodney W. Grimes 			perror_reply(451, "Local resource failure: malloc");
20724b82fc95SYaroslav Tykhiy 			return (-1);
2073ea022d16SRodney W. Grimes 		}
20749fc5823aSGarrett Wollman 
2075ea022d16SRodney W. Grimes 		while ((cnt = read(filefd, buf, (u_int)blksize)) > 0 &&
2076ea022d16SRodney W. Grimes 		    write(netfd, buf, cnt) == cnt)
2077ea022d16SRodney W. Grimes 			byte_count += cnt;
2078ea022d16SRodney W. Grimes 		transflag = 0;
2079ea022d16SRodney W. Grimes 		(void)free(buf);
2080ea022d16SRodney W. Grimes 		if (cnt != 0) {
2081ea022d16SRodney W. Grimes 			if (cnt < 0)
2082ea022d16SRodney W. Grimes 				goto file_err;
2083ea022d16SRodney W. Grimes 			goto data_err;
2084ea022d16SRodney W. Grimes 		}
2085ea022d16SRodney W. Grimes 		reply(226, "Transfer complete.");
20864b82fc95SYaroslav Tykhiy 		return (0);
2087ea022d16SRodney W. Grimes 	default:
2088ea022d16SRodney W. Grimes 		transflag = 0;
2089ea022d16SRodney W. Grimes 		reply(550, "Unimplemented TYPE %d in send_data", type);
20904b82fc95SYaroslav Tykhiy 		return (-1);
2091ea022d16SRodney W. Grimes 	}
2092ea022d16SRodney W. Grimes 
2093ea022d16SRodney W. Grimes data_err:
2094ea022d16SRodney W. Grimes 	transflag = 0;
2095ea022d16SRodney W. Grimes 	perror_reply(426, "Data connection");
20964b82fc95SYaroslav Tykhiy 	return (-1);
2097ea022d16SRodney W. Grimes 
2098ea022d16SRodney W. Grimes file_err:
2099ea022d16SRodney W. Grimes 	transflag = 0;
2100ea022d16SRodney W. Grimes 	perror_reply(551, "Error on input file");
21014b82fc95SYaroslav Tykhiy 	return (-1);
21024b82fc95SYaroslav Tykhiy 
21034b82fc95SYaroslav Tykhiy got_oob:
21044b82fc95SYaroslav Tykhiy 	myoob();
21054b82fc95SYaroslav Tykhiy 	recvurg = 0;
21064b82fc95SYaroslav Tykhiy 	transflag = 0;
21074b82fc95SYaroslav Tykhiy 	return (-1);
2108ea022d16SRodney W. Grimes }
2109ea022d16SRodney W. Grimes 
2110ea022d16SRodney W. Grimes /*
2111ea022d16SRodney W. Grimes  * Transfer data from peer to "outstr" using the appropriate encapulation of
2112ea022d16SRodney W. Grimes  * the data subject to Mode, Structure, and Type.
2113ea022d16SRodney W. Grimes  *
2114ea022d16SRodney W. Grimes  * N.B.: Form isn't handled.
2115ea022d16SRodney W. Grimes  */
2116ea022d16SRodney W. Grimes static int
2117e4bc453cSWarner Losh receive_data(FILE *instr, FILE *outstr)
2118ea022d16SRodney W. Grimes {
2119ea022d16SRodney W. Grimes 	int c;
212061f891a6SPaul Traina 	int cnt, bare_lfs;
2121ea022d16SRodney W. Grimes 	char buf[BUFSIZ];
2122ea022d16SRodney W. Grimes 
2123ea022d16SRodney W. Grimes 	transflag++;
212461f891a6SPaul Traina 	bare_lfs = 0;
212561f891a6SPaul Traina 
2126ea022d16SRodney W. Grimes 	switch (type) {
2127ea022d16SRodney W. Grimes 
2128ea022d16SRodney W. Grimes 	case TYPE_I:
2129ea022d16SRodney W. Grimes 	case TYPE_L:
2130ea022d16SRodney W. Grimes 		while ((cnt = read(fileno(instr), buf, sizeof(buf))) > 0) {
21314b82fc95SYaroslav Tykhiy 			if (recvurg)
21324b82fc95SYaroslav Tykhiy 				goto got_oob;
2133ea022d16SRodney W. Grimes 			if (write(fileno(outstr), buf, cnt) != cnt)
2134ea022d16SRodney W. Grimes 				goto file_err;
2135ea022d16SRodney W. Grimes 			byte_count += cnt;
2136ea022d16SRodney W. Grimes 		}
21374b82fc95SYaroslav Tykhiy 		if (recvurg)
21384b82fc95SYaroslav Tykhiy 			goto got_oob;
2139ea022d16SRodney W. Grimes 		if (cnt < 0)
2140ea022d16SRodney W. Grimes 			goto data_err;
2141ea022d16SRodney W. Grimes 		transflag = 0;
2142ea022d16SRodney W. Grimes 		return (0);
2143ea022d16SRodney W. Grimes 
2144ea022d16SRodney W. Grimes 	case TYPE_E:
2145ea022d16SRodney W. Grimes 		reply(553, "TYPE E not implemented.");
2146ea022d16SRodney W. Grimes 		transflag = 0;
2147ea022d16SRodney W. Grimes 		return (-1);
2148ea022d16SRodney W. Grimes 
2149ea022d16SRodney W. Grimes 	case TYPE_A:
2150ea022d16SRodney W. Grimes 		while ((c = getc(instr)) != EOF) {
21514b82fc95SYaroslav Tykhiy 			if (recvurg)
21524b82fc95SYaroslav Tykhiy 				goto got_oob;
2153ea022d16SRodney W. Grimes 			byte_count++;
2154ea022d16SRodney W. Grimes 			if (c == '\n')
2155ea022d16SRodney W. Grimes 				bare_lfs++;
2156ea022d16SRodney W. Grimes 			while (c == '\r') {
2157ea022d16SRodney W. Grimes 				if (ferror(outstr))
2158ea022d16SRodney W. Grimes 					goto data_err;
2159ea022d16SRodney W. Grimes 				if ((c = getc(instr)) != '\n') {
2160ea022d16SRodney W. Grimes 					(void) putc ('\r', outstr);
2161ea022d16SRodney W. Grimes 					if (c == '\0' || c == EOF)
2162ea022d16SRodney W. Grimes 						goto contin2;
2163ea022d16SRodney W. Grimes 				}
2164ea022d16SRodney W. Grimes 			}
2165ea022d16SRodney W. Grimes 			(void) putc(c, outstr);
2166ea022d16SRodney W. Grimes 	contin2:	;
2167ea022d16SRodney W. Grimes 		}
21684b82fc95SYaroslav Tykhiy 		if (recvurg)
21694b82fc95SYaroslav Tykhiy 			goto got_oob;
2170ea022d16SRodney W. Grimes 		fflush(outstr);
2171ea022d16SRodney W. Grimes 		if (ferror(instr))
2172ea022d16SRodney W. Grimes 			goto data_err;
2173ea022d16SRodney W. Grimes 		if (ferror(outstr))
2174ea022d16SRodney W. Grimes 			goto file_err;
2175ea022d16SRodney W. Grimes 		transflag = 0;
2176ea022d16SRodney W. Grimes 		if (bare_lfs) {
2177ea022d16SRodney W. Grimes 			lreply(226,
2178ea022d16SRodney W. Grimes 		"WARNING! %d bare linefeeds received in ASCII mode",
2179ea022d16SRodney W. Grimes 			    bare_lfs);
2180ea022d16SRodney W. Grimes 		(void)printf("   File may not have transferred correctly.\r\n");
2181ea022d16SRodney W. Grimes 		}
2182ea022d16SRodney W. Grimes 		return (0);
2183ea022d16SRodney W. Grimes 	default:
2184ea022d16SRodney W. Grimes 		reply(550, "Unimplemented TYPE %d in receive_data", type);
2185ea022d16SRodney W. Grimes 		transflag = 0;
2186ea022d16SRodney W. Grimes 		return (-1);
2187ea022d16SRodney W. Grimes 	}
2188ea022d16SRodney W. Grimes 
2189ea022d16SRodney W. Grimes data_err:
2190ea022d16SRodney W. Grimes 	transflag = 0;
2191ea022d16SRodney W. Grimes 	perror_reply(426, "Data Connection");
2192ea022d16SRodney W. Grimes 	return (-1);
2193ea022d16SRodney W. Grimes 
2194ea022d16SRodney W. Grimes file_err:
2195ea022d16SRodney W. Grimes 	transflag = 0;
2196ea022d16SRodney W. Grimes 	perror_reply(452, "Error writing file");
2197ea022d16SRodney W. Grimes 	return (-1);
21984b82fc95SYaroslav Tykhiy 
21994b82fc95SYaroslav Tykhiy got_oob:
22004b82fc95SYaroslav Tykhiy 	myoob();
22014b82fc95SYaroslav Tykhiy 	recvurg = 0;
22024b82fc95SYaroslav Tykhiy 	transflag = 0;
22034b82fc95SYaroslav Tykhiy 	return (-1);
2204ea022d16SRodney W. Grimes }
2205ea022d16SRodney W. Grimes 
2206ea022d16SRodney W. Grimes void
2207e4bc453cSWarner Losh statfilecmd(char *filename)
2208ea022d16SRodney W. Grimes {
2209ea022d16SRodney W. Grimes 	FILE *fin;
2210f8a581a0SYaroslav Tykhiy 	int atstart;
2211ea022d16SRodney W. Grimes 	int c;
2212ea022d16SRodney W. Grimes 	char line[LINE_MAX];
2213ea022d16SRodney W. Grimes 
2214af85d782SDavid Nugent 	(void)snprintf(line, sizeof(line), _PATH_LS " -lgA %s", filename);
2215ea022d16SRodney W. Grimes 	fin = ftpd_popen(line, "r");
2216ea022d16SRodney W. Grimes 	lreply(211, "status of %s:", filename);
2217f8a581a0SYaroslav Tykhiy 	atstart = 1;
2218ea022d16SRodney W. Grimes 	while ((c = getc(fin)) != EOF) {
2219ea022d16SRodney W. Grimes 		if (c == '\n') {
2220ea022d16SRodney W. Grimes 			if (ferror(stdout)){
2221ea022d16SRodney W. Grimes 				perror_reply(421, "control connection");
2222ea022d16SRodney W. Grimes 				(void) ftpd_pclose(fin);
2223ea022d16SRodney W. Grimes 				dologout(1);
2224ea022d16SRodney W. Grimes 				/* NOTREACHED */
2225ea022d16SRodney W. Grimes 			}
2226ea022d16SRodney W. Grimes 			if (ferror(fin)) {
2227ea022d16SRodney W. Grimes 				perror_reply(551, filename);
2228ea022d16SRodney W. Grimes 				(void) ftpd_pclose(fin);
2229ea022d16SRodney W. Grimes 				return;
2230ea022d16SRodney W. Grimes 			}
2231ea022d16SRodney W. Grimes 			(void) putc('\r', stdout);
2232ea022d16SRodney W. Grimes 		}
2233f8a581a0SYaroslav Tykhiy 		/*
2234f8a581a0SYaroslav Tykhiy 		 * RFC 959 says neutral text should be prepended before
2235f8a581a0SYaroslav Tykhiy 		 * a leading 3-digit number followed by whitespace, but
2236f8a581a0SYaroslav Tykhiy 		 * many ftp clients can be confused by any leading digits,
2237f8a581a0SYaroslav Tykhiy 		 * as a matter of fact.
2238f8a581a0SYaroslav Tykhiy 		 */
2239f8a581a0SYaroslav Tykhiy 		if (atstart && isdigit(c))
2240f8a581a0SYaroslav Tykhiy 			(void) putc(' ', stdout);
2241ea022d16SRodney W. Grimes 		(void) putc(c, stdout);
2242f8a581a0SYaroslav Tykhiy 		atstart = (c == '\n');
2243ea022d16SRodney W. Grimes 	}
2244ea022d16SRodney W. Grimes 	(void) ftpd_pclose(fin);
2245ea022d16SRodney W. Grimes 	reply(211, "End of Status");
2246ea022d16SRodney W. Grimes }
2247ea022d16SRodney W. Grimes 
2248ea022d16SRodney W. Grimes void
2249e4bc453cSWarner Losh statcmd(void)
2250ea022d16SRodney W. Grimes {
22514dd8b5abSYoshinobu Inoue 	union sockunion *su;
2252ea022d16SRodney W. Grimes 	u_char *a, *p;
2253b0f06defSHajimu UMEMOTO 	char hname[NI_MAXHOST];
22544dd8b5abSYoshinobu Inoue 	int ispassive;
2255ea022d16SRodney W. Grimes 
2256c152df28SYaroslav Tykhiy 	if (hostinfo) {
2257a23f61bcSYaroslav Tykhiy 		lreply(211, "%s FTP server status:", hostname);
2258ea022d16SRodney W. Grimes 		printf("     %s\r\n", version);
2259c152df28SYaroslav Tykhiy 	} else
2260c152df28SYaroslav Tykhiy 		lreply(211, "FTP server status:");
2261ea022d16SRodney W. Grimes 	printf("     Connected to %s", remotehost);
22624dd8b5abSYoshinobu Inoue 	if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
2263b0f06defSHajimu UMEMOTO 			 hname, sizeof(hname) - 1, NULL, 0, NI_NUMERICHOST)) {
22644dd8b5abSYoshinobu Inoue 		if (strcmp(hname, remotehost) != 0)
22654dd8b5abSYoshinobu Inoue 			printf(" (%s)", hname);
22664dd8b5abSYoshinobu Inoue 	}
2267ea022d16SRodney W. Grimes 	printf("\r\n");
2268ea022d16SRodney W. Grimes 	if (logged_in) {
2269ea022d16SRodney W. Grimes 		if (guest)
2270ea022d16SRodney W. Grimes 			printf("     Logged in anonymously\r\n");
2271ea022d16SRodney W. Grimes 		else
2272ea022d16SRodney W. Grimes 			printf("     Logged in as %s\r\n", pw->pw_name);
2273ea022d16SRodney W. Grimes 	} else if (askpasswd)
2274ea022d16SRodney W. Grimes 		printf("     Waiting for password\r\n");
2275ea022d16SRodney W. Grimes 	else
2276ea022d16SRodney W. Grimes 		printf("     Waiting for user name\r\n");
2277ea022d16SRodney W. Grimes 	printf("     TYPE: %s", typenames[type]);
2278ea022d16SRodney W. Grimes 	if (type == TYPE_A || type == TYPE_E)
2279ea022d16SRodney W. Grimes 		printf(", FORM: %s", formnames[form]);
2280ea022d16SRodney W. Grimes 	if (type == TYPE_L)
228189fdc4e1SMike Barcroft #if CHAR_BIT == 8
228289fdc4e1SMike Barcroft 		printf(" %d", CHAR_BIT);
2283ea022d16SRodney W. Grimes #else
2284ea022d16SRodney W. Grimes 		printf(" %d", bytesize);	/* need definition! */
2285ea022d16SRodney W. Grimes #endif
2286ea022d16SRodney W. Grimes 	printf("; STRUcture: %s; transfer MODE: %s\r\n",
2287ea022d16SRodney W. Grimes 	    strunames[stru], modenames[mode]);
2288ea022d16SRodney W. Grimes 	if (data != -1)
2289ea022d16SRodney W. Grimes 		printf("     Data connection open\r\n");
2290ea022d16SRodney W. Grimes 	else if (pdata != -1) {
22914dd8b5abSYoshinobu Inoue 		ispassive = 1;
22924dd8b5abSYoshinobu Inoue 		su = &pasv_addr;
2293ea022d16SRodney W. Grimes 		goto printaddr;
2294ea022d16SRodney W. Grimes 	} else if (usedefault == 0) {
22954dd8b5abSYoshinobu Inoue 		ispassive = 0;
22964dd8b5abSYoshinobu Inoue 		su = &data_dest;
2297ea022d16SRodney W. Grimes printaddr:
2298ea022d16SRodney W. Grimes #define UC(b) (((int) b) & 0xff)
22994dd8b5abSYoshinobu Inoue 		if (epsvall) {
23004dd8b5abSYoshinobu Inoue 			printf("     EPSV only mode (EPSV ALL)\r\n");
23014dd8b5abSYoshinobu Inoue 			goto epsvonly;
23024dd8b5abSYoshinobu Inoue 		}
23034dd8b5abSYoshinobu Inoue 
23044dd8b5abSYoshinobu Inoue 		/* PORT/PASV */
23054dd8b5abSYoshinobu Inoue 		if (su->su_family == AF_INET) {
23064dd8b5abSYoshinobu Inoue 			a = (u_char *) &su->su_sin.sin_addr;
23074dd8b5abSYoshinobu Inoue 			p = (u_char *) &su->su_sin.sin_port;
23084dd8b5abSYoshinobu Inoue 			printf("     %s (%d,%d,%d,%d,%d,%d)\r\n",
23094dd8b5abSYoshinobu Inoue 				ispassive ? "PASV" : "PORT",
23104dd8b5abSYoshinobu Inoue 				UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
23114dd8b5abSYoshinobu Inoue 				UC(p[0]), UC(p[1]));
23124dd8b5abSYoshinobu Inoue 		}
23134dd8b5abSYoshinobu Inoue 
23144dd8b5abSYoshinobu Inoue 		/* LPRT/LPSV */
23154dd8b5abSYoshinobu Inoue 	    {
23164dd8b5abSYoshinobu Inoue 		int alen, af, i;
23174dd8b5abSYoshinobu Inoue 
23184dd8b5abSYoshinobu Inoue 		switch (su->su_family) {
23194dd8b5abSYoshinobu Inoue 		case AF_INET:
23204dd8b5abSYoshinobu Inoue 			a = (u_char *) &su->su_sin.sin_addr;
23214dd8b5abSYoshinobu Inoue 			p = (u_char *) &su->su_sin.sin_port;
23224dd8b5abSYoshinobu Inoue 			alen = sizeof(su->su_sin.sin_addr);
23234dd8b5abSYoshinobu Inoue 			af = 4;
23244dd8b5abSYoshinobu Inoue 			break;
23254dd8b5abSYoshinobu Inoue 		case AF_INET6:
23264dd8b5abSYoshinobu Inoue 			a = (u_char *) &su->su_sin6.sin6_addr;
23274dd8b5abSYoshinobu Inoue 			p = (u_char *) &su->su_sin6.sin6_port;
23284dd8b5abSYoshinobu Inoue 			alen = sizeof(su->su_sin6.sin6_addr);
23294dd8b5abSYoshinobu Inoue 			af = 6;
23304dd8b5abSYoshinobu Inoue 			break;
23314dd8b5abSYoshinobu Inoue 		default:
23324dd8b5abSYoshinobu Inoue 			af = 0;
23334dd8b5abSYoshinobu Inoue 			break;
23344dd8b5abSYoshinobu Inoue 		}
23354dd8b5abSYoshinobu Inoue 		if (af) {
23364dd8b5abSYoshinobu Inoue 			printf("     %s (%d,%d,", ispassive ? "LPSV" : "LPRT",
23374dd8b5abSYoshinobu Inoue 				af, alen);
23384dd8b5abSYoshinobu Inoue 			for (i = 0; i < alen; i++)
23394dd8b5abSYoshinobu Inoue 				printf("%d,", UC(a[i]));
23404dd8b5abSYoshinobu Inoue 			printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1]));
23414dd8b5abSYoshinobu Inoue 		}
23424dd8b5abSYoshinobu Inoue 	    }
23434dd8b5abSYoshinobu Inoue 
23444dd8b5abSYoshinobu Inoue epsvonly:;
23454dd8b5abSYoshinobu Inoue 		/* EPRT/EPSV */
23464dd8b5abSYoshinobu Inoue 	    {
23474dd8b5abSYoshinobu Inoue 		int af;
23484dd8b5abSYoshinobu Inoue 
23494dd8b5abSYoshinobu Inoue 		switch (su->su_family) {
23504dd8b5abSYoshinobu Inoue 		case AF_INET:
23514dd8b5abSYoshinobu Inoue 			af = 1;
23524dd8b5abSYoshinobu Inoue 			break;
23534dd8b5abSYoshinobu Inoue 		case AF_INET6:
23544dd8b5abSYoshinobu Inoue 			af = 2;
23554dd8b5abSYoshinobu Inoue 			break;
23564dd8b5abSYoshinobu Inoue 		default:
23574dd8b5abSYoshinobu Inoue 			af = 0;
23584dd8b5abSYoshinobu Inoue 			break;
23594dd8b5abSYoshinobu Inoue 		}
23604dd8b5abSYoshinobu Inoue 		if (af) {
2361b0f06defSHajimu UMEMOTO 			union sockunion tmp;
2362b0f06defSHajimu UMEMOTO 
2363b0f06defSHajimu UMEMOTO 			tmp = *su;
2364b0f06defSHajimu UMEMOTO 			if (tmp.su_family == AF_INET6)
2365b0f06defSHajimu UMEMOTO 				tmp.su_sin6.sin6_scope_id = 0;
2366b0f06defSHajimu UMEMOTO 			if (!getnameinfo((struct sockaddr *)&tmp, tmp.su_len,
23674dd8b5abSYoshinobu Inoue 					hname, sizeof(hname) - 1, NULL, 0,
23684dd8b5abSYoshinobu Inoue 					NI_NUMERICHOST)) {
23694dd8b5abSYoshinobu Inoue 				printf("     %s |%d|%s|%d|\r\n",
23704dd8b5abSYoshinobu Inoue 					ispassive ? "EPSV" : "EPRT",
2371b0f06defSHajimu UMEMOTO 					af, hname, htons(tmp.su_port));
23724dd8b5abSYoshinobu Inoue 			}
23734dd8b5abSYoshinobu Inoue 		}
23744dd8b5abSYoshinobu Inoue 	    }
2375ea022d16SRodney W. Grimes #undef UC
2376ea022d16SRodney W. Grimes 	} else
2377ea022d16SRodney W. Grimes 		printf("     No data connection\r\n");
2378ea022d16SRodney W. Grimes 	reply(211, "End of status");
2379ea022d16SRodney W. Grimes }
2380ea022d16SRodney W. Grimes 
2381ea022d16SRodney W. Grimes void
2382e4bc453cSWarner Losh fatalerror(char *s)
2383ea022d16SRodney W. Grimes {
2384ea022d16SRodney W. Grimes 
2385ea022d16SRodney W. Grimes 	reply(451, "Error in server: %s\n", s);
2386ea022d16SRodney W. Grimes 	reply(221, "Closing connection due to server error.");
2387ea022d16SRodney W. Grimes 	dologout(0);
2388ea022d16SRodney W. Grimes 	/* NOTREACHED */
2389ea022d16SRodney W. Grimes }
2390ea022d16SRodney W. Grimes 
2391ea022d16SRodney W. Grimes void
2392ea022d16SRodney W. Grimes reply(int n, const char *fmt, ...)
2393ea022d16SRodney W. Grimes {
2394ea022d16SRodney W. Grimes 	va_list ap;
2395e4bc453cSWarner Losh 
2396ea022d16SRodney W. Grimes 	(void)printf("%d ", n);
23979cbb335cSTim J. Robbins 	va_start(ap, fmt);
2398ea022d16SRodney W. Grimes 	(void)vprintf(fmt, ap);
23999cbb335cSTim J. Robbins 	va_end(ap);
2400ea022d16SRodney W. Grimes 	(void)printf("\r\n");
2401ea022d16SRodney W. Grimes 	(void)fflush(stdout);
2402618b0bbaSMark Murray 	if (ftpdebug) {
2403ea022d16SRodney W. Grimes 		syslog(LOG_DEBUG, "<--- %d ", n);
24049cbb335cSTim J. Robbins 		va_start(ap, fmt);
2405ea022d16SRodney W. Grimes 		vsyslog(LOG_DEBUG, fmt, ap);
24069cbb335cSTim J. Robbins 		va_end(ap);
2407ea022d16SRodney W. Grimes 	}
2408ea022d16SRodney W. Grimes }
2409ea022d16SRodney W. Grimes 
2410ea022d16SRodney W. Grimes void
2411ea022d16SRodney W. Grimes lreply(int n, const char *fmt, ...)
2412ea022d16SRodney W. Grimes {
2413ea022d16SRodney W. Grimes 	va_list ap;
2414e4bc453cSWarner Losh 
2415ea022d16SRodney W. Grimes 	(void)printf("%d- ", n);
24169cbb335cSTim J. Robbins 	va_start(ap, fmt);
2417ea022d16SRodney W. Grimes 	(void)vprintf(fmt, ap);
24189cbb335cSTim J. Robbins 	va_end(ap);
2419ea022d16SRodney W. Grimes 	(void)printf("\r\n");
2420ea022d16SRodney W. Grimes 	(void)fflush(stdout);
2421618b0bbaSMark Murray 	if (ftpdebug) {
2422ea022d16SRodney W. Grimes 		syslog(LOG_DEBUG, "<--- %d- ", n);
24239cbb335cSTim J. Robbins 		va_start(ap, fmt);
2424ea022d16SRodney W. Grimes 		vsyslog(LOG_DEBUG, fmt, ap);
24259cbb335cSTim J. Robbins 		va_end(ap);
2426ea022d16SRodney W. Grimes 	}
2427ea022d16SRodney W. Grimes }
2428ea022d16SRodney W. Grimes 
2429ea022d16SRodney W. Grimes static void
2430e4bc453cSWarner Losh ack(char *s)
2431ea022d16SRodney W. Grimes {
2432ea022d16SRodney W. Grimes 
2433ea022d16SRodney W. Grimes 	reply(250, "%s command successful.", s);
2434ea022d16SRodney W. Grimes }
2435ea022d16SRodney W. Grimes 
2436ea022d16SRodney W. Grimes void
2437e4bc453cSWarner Losh nack(char *s)
2438ea022d16SRodney W. Grimes {
2439ea022d16SRodney W. Grimes 
2440ea022d16SRodney W. Grimes 	reply(502, "%s command not implemented.", s);
2441ea022d16SRodney W. Grimes }
2442ea022d16SRodney W. Grimes 
2443ea022d16SRodney W. Grimes /* ARGSUSED */
2444ea022d16SRodney W. Grimes void
2445e4bc453cSWarner Losh yyerror(char *s)
2446ea022d16SRodney W. Grimes {
2447ea022d16SRodney W. Grimes 	char *cp;
2448ea022d16SRodney W. Grimes 
24499aca17cbSMark Murray 	if ((cp = strchr(cbuf,'\n')))
2450ea022d16SRodney W. Grimes 		*cp = '\0';
2451ea022d16SRodney W. Grimes 	reply(500, "'%s': command not understood.", cbuf);
2452ea022d16SRodney W. Grimes }
2453ea022d16SRodney W. Grimes 
2454ea022d16SRodney W. Grimes void
2455e4bc453cSWarner Losh delete(char *name)
2456ea022d16SRodney W. Grimes {
2457ea022d16SRodney W. Grimes 	struct stat st;
2458ea022d16SRodney W. Grimes 
2459ea022d16SRodney W. Grimes 	LOGCMD("delete", name);
24601b0e12d7SYaroslav Tykhiy 	if (lstat(name, &st) < 0) {
2461ea022d16SRodney W. Grimes 		perror_reply(550, name);
2462ea022d16SRodney W. Grimes 		return;
2463ea022d16SRodney W. Grimes 	}
2464ea022d16SRodney W. Grimes 	if ((st.st_mode&S_IFMT) == S_IFDIR) {
2465ea022d16SRodney W. Grimes 		if (rmdir(name) < 0) {
2466ea022d16SRodney W. Grimes 			perror_reply(550, name);
2467ea022d16SRodney W. Grimes 			return;
2468ea022d16SRodney W. Grimes 		}
2469ea022d16SRodney W. Grimes 		goto done;
2470ea022d16SRodney W. Grimes 	}
24713f8b9cfeSYaroslav Tykhiy 	if (guest && noguestmod) {
24723f8b9cfeSYaroslav Tykhiy 		reply(550, "Operation not permitted");
24733f8b9cfeSYaroslav Tykhiy 		return;
24743f8b9cfeSYaroslav Tykhiy 	}
24753f8b9cfeSYaroslav Tykhiy 	if (unlink(name) < 0) {
2476ea022d16SRodney W. Grimes 		perror_reply(550, name);
2477ea022d16SRodney W. Grimes 		return;
2478ea022d16SRodney W. Grimes 	}
2479ea022d16SRodney W. Grimes done:
2480ea022d16SRodney W. Grimes 	ack("DELE");
2481ea022d16SRodney W. Grimes }
2482ea022d16SRodney W. Grimes 
2483ea022d16SRodney W. Grimes void
2484e4bc453cSWarner Losh cwd(char *path)
2485ea022d16SRodney W. Grimes {
2486ea022d16SRodney W. Grimes 
2487ea022d16SRodney W. Grimes 	if (chdir(path) < 0)
2488ea022d16SRodney W. Grimes 		perror_reply(550, path);
2489ea022d16SRodney W. Grimes 	else
2490ea022d16SRodney W. Grimes 		ack("CWD");
2491ea022d16SRodney W. Grimes }
2492ea022d16SRodney W. Grimes 
2493ea022d16SRodney W. Grimes void
2494e4bc453cSWarner Losh makedir(char *name)
2495ea022d16SRodney W. Grimes {
24962b748987SYaroslav Tykhiy 	char *s;
2497ea022d16SRodney W. Grimes 
2498ea022d16SRodney W. Grimes 	LOGCMD("mkdir", name);
2499d186bb12SMatthew N. Dodd 	if (guest && noguestmkd)
2500d186bb12SMatthew N. Dodd 		reply(550, "%s: permission denied", name);
2501d186bb12SMatthew N. Dodd 	else if (mkdir(name, 0777) < 0)
2502ea022d16SRodney W. Grimes 		perror_reply(550, name);
25032b748987SYaroslav Tykhiy 	else {
25042b748987SYaroslav Tykhiy 		if ((s = doublequote(name)) == NULL)
25052b748987SYaroslav Tykhiy 			fatalerror("Ran out of memory.");
25062b748987SYaroslav Tykhiy 		reply(257, "\"%s\" directory created.", s);
25072b748987SYaroslav Tykhiy 		free(s);
25082b748987SYaroslav Tykhiy 	}
2509ea022d16SRodney W. Grimes }
2510ea022d16SRodney W. Grimes 
2511ea022d16SRodney W. Grimes void
2512e4bc453cSWarner Losh removedir(char *name)
2513ea022d16SRodney W. Grimes {
2514ea022d16SRodney W. Grimes 
2515ea022d16SRodney W. Grimes 	LOGCMD("rmdir", name);
2516ea022d16SRodney W. Grimes 	if (rmdir(name) < 0)
2517ea022d16SRodney W. Grimes 		perror_reply(550, name);
2518ea022d16SRodney W. Grimes 	else
2519ea022d16SRodney W. Grimes 		ack("RMD");
2520ea022d16SRodney W. Grimes }
2521ea022d16SRodney W. Grimes 
2522ea022d16SRodney W. Grimes void
2523e4bc453cSWarner Losh pwd(void)
2524ea022d16SRodney W. Grimes {
2525e4648f05SYaroslav Tykhiy 	char *s, path[MAXPATHLEN + 1];
2526ea022d16SRodney W. Grimes 
2527ea022d16SRodney W. Grimes 	if (getwd(path) == (char *)NULL)
2528ea022d16SRodney W. Grimes 		reply(550, "%s.", path);
2529e4648f05SYaroslav Tykhiy 	else {
2530e4648f05SYaroslav Tykhiy 		if ((s = doublequote(path)) == NULL)
2531e4648f05SYaroslav Tykhiy 			fatalerror("Ran out of memory.");
2532e4648f05SYaroslav Tykhiy 		reply(257, "\"%s\" is current directory.", s);
2533e4648f05SYaroslav Tykhiy 		free(s);
2534e4648f05SYaroslav Tykhiy 	}
2535ea022d16SRodney W. Grimes }
2536ea022d16SRodney W. Grimes 
2537ea022d16SRodney W. Grimes char *
2538e4bc453cSWarner Losh renamefrom(char *name)
2539ea022d16SRodney W. Grimes {
2540ea022d16SRodney W. Grimes 	struct stat st;
2541ea022d16SRodney W. Grimes 
2542b943b3c4SYaroslav Tykhiy 	if (guest && noguestmod) {
2543b943b3c4SYaroslav Tykhiy 		reply(550, "Operation not permitted");
2544b943b3c4SYaroslav Tykhiy 		return (NULL);
2545b943b3c4SYaroslav Tykhiy 	}
25461b0e12d7SYaroslav Tykhiy 	if (lstat(name, &st) < 0) {
2547ea022d16SRodney W. Grimes 		perror_reply(550, name);
2548385f9bf0SYaroslav Tykhiy 		return (NULL);
2549ea022d16SRodney W. Grimes 	}
2550ea022d16SRodney W. Grimes 	reply(350, "File exists, ready for destination name");
2551ea022d16SRodney W. Grimes 	return (name);
2552ea022d16SRodney W. Grimes }
2553ea022d16SRodney W. Grimes 
2554ea022d16SRodney W. Grimes void
2555e4bc453cSWarner Losh renamecmd(char *from, char *to)
2556ea022d16SRodney W. Grimes {
255761f891a6SPaul Traina 	struct stat st;
2558ea022d16SRodney W. Grimes 
2559ea022d16SRodney W. Grimes 	LOGCMD2("rename", from, to);
256061f891a6SPaul Traina 
256161f891a6SPaul Traina 	if (guest && (stat(to, &st) == 0)) {
256261f891a6SPaul Traina 		reply(550, "%s: permission denied", to);
256361f891a6SPaul Traina 		return;
256461f891a6SPaul Traina 	}
256561f891a6SPaul Traina 
2566ea022d16SRodney W. Grimes 	if (rename(from, to) < 0)
2567ea022d16SRodney W. Grimes 		perror_reply(550, "rename");
2568ea022d16SRodney W. Grimes 	else
2569ea022d16SRodney W. Grimes 		ack("RNTO");
2570ea022d16SRodney W. Grimes }
2571ea022d16SRodney W. Grimes 
2572ea022d16SRodney W. Grimes static void
2573e4bc453cSWarner Losh dolog(struct sockaddr *who)
2574ea022d16SRodney W. Grimes {
25754dd8b5abSYoshinobu Inoue 	int error;
25764dd8b5abSYoshinobu Inoue 
25774dd8b5abSYoshinobu Inoue 	realhostname_sa(remotehost, sizeof(remotehost) - 1, who, who->sa_len);
2578ea022d16SRodney W. Grimes 
2579ea022d16SRodney W. Grimes #ifdef SETPROCTITLE
2580ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
2581ea4e54b9SDavid Nugent 	if (thishost != firsthost)
2582ea4e54b9SDavid Nugent 		snprintf(proctitle, sizeof(proctitle), "%s: connected (to %s)",
2583ea4e54b9SDavid Nugent 			 remotehost, hostname);
2584ea4e54b9SDavid Nugent 	else
2585ea4e54b9SDavid Nugent #endif
2586ea4e54b9SDavid Nugent 		snprintf(proctitle, sizeof(proctitle), "%s: connected",
2587ea4e54b9SDavid Nugent 			 remotehost);
2588b63e1fe2SPeter Wemm 	setproctitle("%s", proctitle);
2589ea022d16SRodney W. Grimes #endif /* SETPROCTITLE */
2590ea022d16SRodney W. Grimes 
2591ea4e54b9SDavid Nugent 	if (logging) {
2592ea4e54b9SDavid Nugent #ifdef VIRTUAL_HOSTING
2593ea4e54b9SDavid Nugent 		if (thishost != firsthost)
2594ea4e54b9SDavid Nugent 			syslog(LOG_INFO, "connection from %s (to %s)",
2595ea4e54b9SDavid Nugent 			       remotehost, hostname);
2596ea4e54b9SDavid Nugent 		else
2597ea4e54b9SDavid Nugent #endif
25984dd8b5abSYoshinobu Inoue 		{
25994dd8b5abSYoshinobu Inoue 			char	who_name[MAXHOSTNAMELEN];
26004dd8b5abSYoshinobu Inoue 
26014dd8b5abSYoshinobu Inoue 			error = getnameinfo(who, who->sa_len,
26024dd8b5abSYoshinobu Inoue 					    who_name, sizeof(who_name) - 1,
2603b0f06defSHajimu UMEMOTO 					    NULL, 0, NI_NUMERICHOST);
2604f5c57d05SEivind Eklund 			syslog(LOG_INFO, "connection from %s (%s)", remotehost,
26054dd8b5abSYoshinobu Inoue 			       error == 0 ? who_name : "");
26064dd8b5abSYoshinobu Inoue 		}
2607ea022d16SRodney W. Grimes 	}
2608ea4e54b9SDavid Nugent }
2609ea022d16SRodney W. Grimes 
2610ea022d16SRodney W. Grimes /*
2611ea022d16SRodney W. Grimes  * Record logout in wtmp file
2612ea022d16SRodney W. Grimes  * and exit with supplied status.
2613ea022d16SRodney W. Grimes  */
2614ea022d16SRodney W. Grimes void
2615e4bc453cSWarner Losh dologout(int status)
2616ea022d16SRodney W. Grimes {
26170b4df2eeSDavid Greenman 	/*
26180b4df2eeSDavid Greenman 	 * Prevent reception of SIGURG from resulting in a resumption
26190b4df2eeSDavid Greenman 	 * back to the main program loop.
26200b4df2eeSDavid Greenman 	 */
26210b4df2eeSDavid Greenman 	transflag = 0;
2622ea022d16SRodney W. Grimes 
26235d7e0128SYaroslav Tykhiy 	if (logged_in && dowtmp) {
2624ea022d16SRodney W. Grimes 		(void) seteuid((uid_t)0);
262546948173SHajimu UMEMOTO 		ftpd_logwtmp(ttyline, "", NULL);
2626ea022d16SRodney W. Grimes 	}
2627ea022d16SRodney W. Grimes 	/* beware of flushing buffers after a SIGPIPE */
2628ea022d16SRodney W. Grimes 	_exit(status);
2629ea022d16SRodney W. Grimes }
2630ea022d16SRodney W. Grimes 
2631ea022d16SRodney W. Grimes static void
2632e4bc453cSWarner Losh sigurg(int signo)
2633ea022d16SRodney W. Grimes {
26344b82fc95SYaroslav Tykhiy 
26354b82fc95SYaroslav Tykhiy 	recvurg = 1;
26364b82fc95SYaroslav Tykhiy }
26374b82fc95SYaroslav Tykhiy 
26384b82fc95SYaroslav Tykhiy static void
2639e4bc453cSWarner Losh myoob(void)
26404b82fc95SYaroslav Tykhiy {
2641ea022d16SRodney W. Grimes 	char *cp;
2642ea022d16SRodney W. Grimes 
2643ea022d16SRodney W. Grimes 	/* only process if transfer occurring */
2644ea022d16SRodney W. Grimes 	if (!transflag)
2645ea022d16SRodney W. Grimes 		return;
2646ea022d16SRodney W. Grimes 	cp = tmpline;
2647ea022d16SRodney W. Grimes 	if (getline(cp, 7, stdin) == NULL) {
2648ea022d16SRodney W. Grimes 		reply(221, "You could at least say goodbye.");
2649ea022d16SRodney W. Grimes 		dologout(0);
2650ea022d16SRodney W. Grimes 	}
2651ea022d16SRodney W. Grimes 	upper(cp);
2652ea022d16SRodney W. Grimes 	if (strcmp(cp, "ABOR\r\n") == 0) {
2653ea022d16SRodney W. Grimes 		tmpline[0] = '\0';
2654ea022d16SRodney W. Grimes 		reply(426, "Transfer aborted. Data connection closed.");
2655ea022d16SRodney W. Grimes 		reply(226, "Abort successful");
2656ea022d16SRodney W. Grimes 	}
2657ea022d16SRodney W. Grimes 	if (strcmp(cp, "STAT\r\n") == 0) {
26589db4bbf3SMichael Haro 		tmpline[0] = '\0';
2659ea022d16SRodney W. Grimes 		if (file_size != (off_t) -1)
2660ea022d16SRodney W. Grimes 			reply(213, "Status: %qd of %qd bytes transferred",
2661ea022d16SRodney W. Grimes 			    byte_count, file_size);
2662ea022d16SRodney W. Grimes 		else
2663ea022d16SRodney W. Grimes 			reply(213, "Status: %qd bytes transferred", byte_count);
2664ea022d16SRodney W. Grimes 	}
2665ea022d16SRodney W. Grimes }
2666ea022d16SRodney W. Grimes 
2667ea022d16SRodney W. Grimes /*
2668ea022d16SRodney W. Grimes  * Note: a response of 425 is not mentioned as a possible response to
2669ea022d16SRodney W. Grimes  *	the PASV command in RFC959. However, it has been blessed as
2670ea022d16SRodney W. Grimes  *	a legitimate response by Jon Postel in a telephone conversation
2671ea022d16SRodney W. Grimes  *	with Rick Adams on 25 Jan 89.
2672ea022d16SRodney W. Grimes  */
2673ea022d16SRodney W. Grimes void
2674e4bc453cSWarner Losh passive(void)
2675ea022d16SRodney W. Grimes {
26768af7c9a3SYaroslav Tykhiy 	int len, on;
2677ea022d16SRodney W. Grimes 	char *p, *a;
2678ea022d16SRodney W. Grimes 
267961f891a6SPaul Traina 	if (pdata >= 0)		/* close old port if one set */
268061f891a6SPaul Traina 		close(pdata);
268161f891a6SPaul Traina 
26824dd8b5abSYoshinobu Inoue 	pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
2683ea022d16SRodney W. Grimes 	if (pdata < 0) {
2684ea022d16SRodney W. Grimes 		perror_reply(425, "Can't open passive connection");
2685ea022d16SRodney W. Grimes 		return;
2686ea022d16SRodney W. Grimes 	}
26878af7c9a3SYaroslav Tykhiy 	on = 1;
26888af7c9a3SYaroslav Tykhiy 	if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
26898af7c9a3SYaroslav Tykhiy 		syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
26904c450ad7SPaul Traina 
26914c450ad7SPaul Traina 	(void) seteuid((uid_t)0);
269261f891a6SPaul Traina 
2693dacc9752SPaul Traina #ifdef IP_PORTRANGE
26944dd8b5abSYoshinobu Inoue 	if (ctrl_addr.su_family == AF_INET) {
26958af7c9a3SYaroslav Tykhiy 	    on = restricted_data_ports ? IP_PORTRANGE_HIGH
2696dacc9752SPaul Traina 				       : IP_PORTRANGE_DEFAULT;
2697dacc9752SPaul Traina 
269840e9d39eSPeter Wemm 	    if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
269957d4ef07SYaroslav Tykhiy 			    &on, sizeof(on)) < 0)
27004c450ad7SPaul Traina 		    goto pasv_error;
27014c450ad7SPaul Traina 	}
2702dacc9752SPaul Traina #endif
27032db39860SNick Sayer #ifdef IPV6_PORTRANGE
27042db39860SNick Sayer 	if (ctrl_addr.su_family == AF_INET6) {
27058af7c9a3SYaroslav Tykhiy 	    on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
27062db39860SNick Sayer 				       : IPV6_PORTRANGE_DEFAULT;
27072db39860SNick Sayer 
27082db39860SNick Sayer 	    if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
270957d4ef07SYaroslav Tykhiy 			    &on, sizeof(on)) < 0)
27102db39860SNick Sayer 		    goto pasv_error;
27112db39860SNick Sayer 	}
27122db39860SNick Sayer #endif
271340e9d39eSPeter Wemm 
2714ea022d16SRodney W. Grimes 	pasv_addr = ctrl_addr;
27154dd8b5abSYoshinobu Inoue 	pasv_addr.su_port = 0;
27164dd8b5abSYoshinobu Inoue 	if (bind(pdata, (struct sockaddr *)&pasv_addr, pasv_addr.su_len) < 0)
2717ea022d16SRodney W. Grimes 		goto pasv_error;
271861f891a6SPaul Traina 
2719ea022d16SRodney W. Grimes 	(void) seteuid((uid_t)pw->pw_uid);
27204c450ad7SPaul Traina 
2721ea022d16SRodney W. Grimes 	len = sizeof(pasv_addr);
2722ea022d16SRodney W. Grimes 	if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
2723ea022d16SRodney W. Grimes 		goto pasv_error;
2724ea022d16SRodney W. Grimes 	if (listen(pdata, 1) < 0)
2725ea022d16SRodney W. Grimes 		goto pasv_error;
27264dd8b5abSYoshinobu Inoue 	if (pasv_addr.su_family == AF_INET)
27274dd8b5abSYoshinobu Inoue 		a = (char *) &pasv_addr.su_sin.sin_addr;
27284dd8b5abSYoshinobu Inoue 	else if (pasv_addr.su_family == AF_INET6 &&
27294dd8b5abSYoshinobu Inoue 		 IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr))
27304dd8b5abSYoshinobu Inoue 		a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
27314dd8b5abSYoshinobu Inoue 	else
27324dd8b5abSYoshinobu Inoue 		goto pasv_error;
27334dd8b5abSYoshinobu Inoue 
27344dd8b5abSYoshinobu Inoue 	p = (char *) &pasv_addr.su_port;
2735ea022d16SRodney W. Grimes 
2736ea022d16SRodney W. Grimes #define UC(b) (((int) b) & 0xff)
2737ea022d16SRodney W. Grimes 
2738ea022d16SRodney W. Grimes 	reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
2739ea022d16SRodney W. Grimes 		UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
2740ea022d16SRodney W. Grimes 	return;
2741ea022d16SRodney W. Grimes 
2742ea022d16SRodney W. Grimes pasv_error:
274361f891a6SPaul Traina 	(void) seteuid((uid_t)pw->pw_uid);
2744ea022d16SRodney W. Grimes 	(void) close(pdata);
2745ea022d16SRodney W. Grimes 	pdata = -1;
2746ea022d16SRodney W. Grimes 	perror_reply(425, "Can't open passive connection");
2747ea022d16SRodney W. Grimes 	return;
2748ea022d16SRodney W. Grimes }
2749ea022d16SRodney W. Grimes 
2750ea022d16SRodney W. Grimes /*
27514dd8b5abSYoshinobu Inoue  * Long Passive defined in RFC 1639.
27524dd8b5abSYoshinobu Inoue  *     228 Entering Long Passive Mode
27534dd8b5abSYoshinobu Inoue  *         (af, hal, h1, h2, h3,..., pal, p1, p2...)
27544dd8b5abSYoshinobu Inoue  */
27554dd8b5abSYoshinobu Inoue 
27564dd8b5abSYoshinobu Inoue void
2757e4bc453cSWarner Losh long_passive(char *cmd, int pf)
27584dd8b5abSYoshinobu Inoue {
27598af7c9a3SYaroslav Tykhiy 	int len, on;
27604dd8b5abSYoshinobu Inoue 	char *p, *a;
27614dd8b5abSYoshinobu Inoue 
27624dd8b5abSYoshinobu Inoue 	if (pdata >= 0)		/* close old port if one set */
27634dd8b5abSYoshinobu Inoue 		close(pdata);
27644dd8b5abSYoshinobu Inoue 
27654dd8b5abSYoshinobu Inoue 	if (pf != PF_UNSPEC) {
27664dd8b5abSYoshinobu Inoue 		if (ctrl_addr.su_family != pf) {
27674dd8b5abSYoshinobu Inoue 			switch (ctrl_addr.su_family) {
27684dd8b5abSYoshinobu Inoue 			case AF_INET:
27694dd8b5abSYoshinobu Inoue 				pf = 1;
27704dd8b5abSYoshinobu Inoue 				break;
27714dd8b5abSYoshinobu Inoue 			case AF_INET6:
27724dd8b5abSYoshinobu Inoue 				pf = 2;
27734dd8b5abSYoshinobu Inoue 				break;
27744dd8b5abSYoshinobu Inoue 			default:
27754dd8b5abSYoshinobu Inoue 				pf = 0;
27764dd8b5abSYoshinobu Inoue 				break;
27774dd8b5abSYoshinobu Inoue 			}
27784dd8b5abSYoshinobu Inoue 			/*
27794dd8b5abSYoshinobu Inoue 			 * XXX
27804dd8b5abSYoshinobu Inoue 			 * only EPRT/EPSV ready clients will understand this
27814dd8b5abSYoshinobu Inoue 			 */
27824dd8b5abSYoshinobu Inoue 			if (strcmp(cmd, "EPSV") == 0 && pf) {
27834dd8b5abSYoshinobu Inoue 				reply(522, "Network protocol mismatch, "
27844dd8b5abSYoshinobu Inoue 					"use (%d)", pf);
27854dd8b5abSYoshinobu Inoue 			} else
27864dd8b5abSYoshinobu Inoue 				reply(501, "Network protocol mismatch"); /*XXX*/
27874dd8b5abSYoshinobu Inoue 
27884dd8b5abSYoshinobu Inoue 			return;
27894dd8b5abSYoshinobu Inoue 		}
27904dd8b5abSYoshinobu Inoue 	}
27914dd8b5abSYoshinobu Inoue 
27924dd8b5abSYoshinobu Inoue 	pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
27934dd8b5abSYoshinobu Inoue 	if (pdata < 0) {
27944dd8b5abSYoshinobu Inoue 		perror_reply(425, "Can't open passive connection");
27954dd8b5abSYoshinobu Inoue 		return;
27964dd8b5abSYoshinobu Inoue 	}
27978af7c9a3SYaroslav Tykhiy 	on = 1;
27988af7c9a3SYaroslav Tykhiy 	if (setsockopt(pdata, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
27998af7c9a3SYaroslav Tykhiy 		syslog(LOG_WARNING, "pdata setsockopt (SO_REUSEADDR): %m");
28004dd8b5abSYoshinobu Inoue 
28014dd8b5abSYoshinobu Inoue 	(void) seteuid((uid_t)0);
28024dd8b5abSYoshinobu Inoue 
28034dd8b5abSYoshinobu Inoue 	pasv_addr = ctrl_addr;
28044dd8b5abSYoshinobu Inoue 	pasv_addr.su_port = 0;
28054dd8b5abSYoshinobu Inoue 	len = pasv_addr.su_len;
28064dd8b5abSYoshinobu Inoue 
28072db39860SNick Sayer #ifdef IP_PORTRANGE
28082db39860SNick Sayer 	if (ctrl_addr.su_family == AF_INET) {
28098af7c9a3SYaroslav Tykhiy 	    on = restricted_data_ports ? IP_PORTRANGE_HIGH
28102db39860SNick Sayer 				       : IP_PORTRANGE_DEFAULT;
28112db39860SNick Sayer 
28122db39860SNick Sayer 	    if (setsockopt(pdata, IPPROTO_IP, IP_PORTRANGE,
281357d4ef07SYaroslav Tykhiy 			    &on, sizeof(on)) < 0)
28142db39860SNick Sayer 		    goto pasv_error;
28152db39860SNick Sayer 	}
28162db39860SNick Sayer #endif
28172db39860SNick Sayer #ifdef IPV6_PORTRANGE
28182db39860SNick Sayer 	if (ctrl_addr.su_family == AF_INET6) {
28198af7c9a3SYaroslav Tykhiy 	    on = restricted_data_ports ? IPV6_PORTRANGE_HIGH
28202db39860SNick Sayer 				       : IPV6_PORTRANGE_DEFAULT;
28212db39860SNick Sayer 
28222db39860SNick Sayer 	    if (setsockopt(pdata, IPPROTO_IPV6, IPV6_PORTRANGE,
282357d4ef07SYaroslav Tykhiy 			    &on, sizeof(on)) < 0)
28242db39860SNick Sayer 		    goto pasv_error;
28252db39860SNick Sayer 	}
28262db39860SNick Sayer #endif
28272db39860SNick Sayer 
28284dd8b5abSYoshinobu Inoue 	if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0)
28294dd8b5abSYoshinobu Inoue 		goto pasv_error;
28304dd8b5abSYoshinobu Inoue 
28314dd8b5abSYoshinobu Inoue 	(void) seteuid((uid_t)pw->pw_uid);
28324dd8b5abSYoshinobu Inoue 
28334dd8b5abSYoshinobu Inoue 	if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
28344dd8b5abSYoshinobu Inoue 		goto pasv_error;
28354dd8b5abSYoshinobu Inoue 	if (listen(pdata, 1) < 0)
28364dd8b5abSYoshinobu Inoue 		goto pasv_error;
28374dd8b5abSYoshinobu Inoue 
28384dd8b5abSYoshinobu Inoue #define UC(b) (((int) b) & 0xff)
28394dd8b5abSYoshinobu Inoue 
28404dd8b5abSYoshinobu Inoue 	if (strcmp(cmd, "LPSV") == 0) {
28414dd8b5abSYoshinobu Inoue 		p = (char *)&pasv_addr.su_port;
28424dd8b5abSYoshinobu Inoue 		switch (pasv_addr.su_family) {
28434dd8b5abSYoshinobu Inoue 		case AF_INET:
28444dd8b5abSYoshinobu Inoue 			a = (char *) &pasv_addr.su_sin.sin_addr;
28454dd8b5abSYoshinobu Inoue 		v4_reply:
28464dd8b5abSYoshinobu Inoue 			reply(228,
28474dd8b5abSYoshinobu Inoue "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)",
28484dd8b5abSYoshinobu Inoue 			      4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
28494dd8b5abSYoshinobu Inoue 			      2, UC(p[0]), UC(p[1]));
28504dd8b5abSYoshinobu Inoue 			return;
28514dd8b5abSYoshinobu Inoue 		case AF_INET6:
28524dd8b5abSYoshinobu Inoue 			if (IN6_IS_ADDR_V4MAPPED(&pasv_addr.su_sin6.sin6_addr)) {
28534dd8b5abSYoshinobu Inoue 				a = (char *) &pasv_addr.su_sin6.sin6_addr.s6_addr[12];
28544dd8b5abSYoshinobu Inoue 				goto v4_reply;
28554dd8b5abSYoshinobu Inoue 			}
28564dd8b5abSYoshinobu Inoue 			a = (char *) &pasv_addr.su_sin6.sin6_addr;
28574dd8b5abSYoshinobu Inoue 			reply(228,
28584dd8b5abSYoshinobu Inoue "Entering Long Passive Mode "
28594dd8b5abSYoshinobu Inoue "(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)",
28604dd8b5abSYoshinobu Inoue 			      6, 16, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
28614dd8b5abSYoshinobu Inoue 			      UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]),
28624dd8b5abSYoshinobu Inoue 			      UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]),
28634dd8b5abSYoshinobu Inoue 			      UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]),
28644dd8b5abSYoshinobu Inoue 			      2, UC(p[0]), UC(p[1]));
28654dd8b5abSYoshinobu Inoue 			return;
28664dd8b5abSYoshinobu Inoue 		}
28674dd8b5abSYoshinobu Inoue 	} else if (strcmp(cmd, "EPSV") == 0) {
28684dd8b5abSYoshinobu Inoue 		switch (pasv_addr.su_family) {
28694dd8b5abSYoshinobu Inoue 		case AF_INET:
28704dd8b5abSYoshinobu Inoue 		case AF_INET6:
28714dd8b5abSYoshinobu Inoue 			reply(229, "Entering Extended Passive Mode (|||%d|)",
28724dd8b5abSYoshinobu Inoue 				ntohs(pasv_addr.su_port));
28734dd8b5abSYoshinobu Inoue 			return;
28744dd8b5abSYoshinobu Inoue 		}
28754dd8b5abSYoshinobu Inoue 	} else {
28764dd8b5abSYoshinobu Inoue 		/* more proper error code? */
28774dd8b5abSYoshinobu Inoue 	}
28784dd8b5abSYoshinobu Inoue 
28794dd8b5abSYoshinobu Inoue pasv_error:
28804dd8b5abSYoshinobu Inoue 	(void) seteuid((uid_t)pw->pw_uid);
28814dd8b5abSYoshinobu Inoue 	(void) close(pdata);
28824dd8b5abSYoshinobu Inoue 	pdata = -1;
28834dd8b5abSYoshinobu Inoue 	perror_reply(425, "Can't open passive connection");
28844dd8b5abSYoshinobu Inoue 	return;
28854dd8b5abSYoshinobu Inoue }
28864dd8b5abSYoshinobu Inoue 
28874dd8b5abSYoshinobu Inoue /*
2888a117c345SYaroslav Tykhiy  * Generate unique name for file with basename "local"
2889a117c345SYaroslav Tykhiy  * and open the file in order to avoid possible races.
2890a117c345SYaroslav Tykhiy  * Try "local" first, then "local.1", "local.2" etc, up to "local.99".
2891a117c345SYaroslav Tykhiy  * Return descriptor to the file, set "name" to its name.
2892a117c345SYaroslav Tykhiy  *
2893ea022d16SRodney W. Grimes  * Generates failure reply on error.
2894ea022d16SRodney W. Grimes  */
2895a117c345SYaroslav Tykhiy static int
2896a117c345SYaroslav Tykhiy guniquefd(char *local, char **name)
2897ea022d16SRodney W. Grimes {
2898ea022d16SRodney W. Grimes 	static char new[MAXPATHLEN];
2899ea022d16SRodney W. Grimes 	struct stat st;
2900ea022d16SRodney W. Grimes 	char *cp;
2901a117c345SYaroslav Tykhiy 	int count;
2902a117c345SYaroslav Tykhiy 	int fd;
2903ea022d16SRodney W. Grimes 
2904ea022d16SRodney W. Grimes 	cp = strrchr(local, '/');
2905ea022d16SRodney W. Grimes 	if (cp)
2906ea022d16SRodney W. Grimes 		*cp = '\0';
2907ea022d16SRodney W. Grimes 	if (stat(cp ? local : ".", &st) < 0) {
2908ea022d16SRodney W. Grimes 		perror_reply(553, cp ? local : ".");
2909a117c345SYaroslav Tykhiy 		return (-1);
2910ea022d16SRodney W. Grimes 	}
2911a117c345SYaroslav Tykhiy 	if (cp) {
2912a117c345SYaroslav Tykhiy 		/*
2913a117c345SYaroslav Tykhiy 		 * Let not overwrite dirname with counter suffix.
2914a117c345SYaroslav Tykhiy 		 * -4 is for /nn\0
2915a117c345SYaroslav Tykhiy 		 * In this extreme case dot won't be put in front of suffix.
2916a117c345SYaroslav Tykhiy 		 */
2917a117c345SYaroslav Tykhiy 		if (strlen(local) > sizeof(new) - 4) {
2918a117c345SYaroslav Tykhiy 			reply(553, "Pathname too long");
2919a117c345SYaroslav Tykhiy 			return (-1);
2920a117c345SYaroslav Tykhiy 		}
2921ea022d16SRodney W. Grimes 		*cp = '/';
2922a117c345SYaroslav Tykhiy 	}
2923e760ef2cSWarner Losh 	/* -4 is for the .nn<null> we put on the end below */
2924e760ef2cSWarner Losh 	(void) snprintf(new, sizeof(new) - 4, "%s", local);
2925ea022d16SRodney W. Grimes 	cp = new + strlen(new);
2926a117c345SYaroslav Tykhiy 	/*
2927a117c345SYaroslav Tykhiy 	 * Don't generate dotfile unless requested explicitly.
2928a117c345SYaroslav Tykhiy 	 * This covers the case when basename gets truncated off
2929a117c345SYaroslav Tykhiy 	 * by buffer size.
2930a117c345SYaroslav Tykhiy 	 */
2931a117c345SYaroslav Tykhiy 	if (cp > new && cp[-1] != '/')
2932ea022d16SRodney W. Grimes 		*cp++ = '.';
2933a117c345SYaroslav Tykhiy 	for (count = 0; count < 100; count++) {
2934a117c345SYaroslav Tykhiy 		/* At count 0 try unmodified name */
2935a117c345SYaroslav Tykhiy 		if (count)
2936ea022d16SRodney W. Grimes 			(void)sprintf(cp, "%d", count);
2937a117c345SYaroslav Tykhiy 		if ((fd = open(count ? new : local,
2938a117c345SYaroslav Tykhiy 		    O_RDWR | O_CREAT | O_EXCL, 0666)) >= 0) {
2939a117c345SYaroslav Tykhiy 			*name = count ? new : local;
2940a117c345SYaroslav Tykhiy 			return (fd);
2941a117c345SYaroslav Tykhiy 		}
294288b70721SYaroslav Tykhiy 		if (errno != EEXIST) {
294350618d61SYaroslav Tykhiy 			perror_reply(553, count ? new : local);
294488b70721SYaroslav Tykhiy 			return (-1);
294588b70721SYaroslav Tykhiy 		}
2946ea022d16SRodney W. Grimes 	}
2947ea022d16SRodney W. Grimes 	reply(452, "Unique file name cannot be created.");
2948a117c345SYaroslav Tykhiy 	return (-1);
2949ea022d16SRodney W. Grimes }
2950ea022d16SRodney W. Grimes 
2951ea022d16SRodney W. Grimes /*
2952ea022d16SRodney W. Grimes  * Format and send reply containing system error number.
2953ea022d16SRodney W. Grimes  */
2954ea022d16SRodney W. Grimes void
2955e4bc453cSWarner Losh perror_reply(int code, char *string)
2956ea022d16SRodney W. Grimes {
2957ea022d16SRodney W. Grimes 
2958ea022d16SRodney W. Grimes 	reply(code, "%s: %s.", string, strerror(errno));
2959ea022d16SRodney W. Grimes }
2960ea022d16SRodney W. Grimes 
2961ea022d16SRodney W. Grimes static char *onefile[] = {
2962ea022d16SRodney W. Grimes 	"",
2963ea022d16SRodney W. Grimes 	0
2964ea022d16SRodney W. Grimes };
2965ea022d16SRodney W. Grimes 
2966ea022d16SRodney W. Grimes void
2967e4bc453cSWarner Losh send_file_list(char *whichf)
2968ea022d16SRodney W. Grimes {
2969ea022d16SRodney W. Grimes 	struct stat st;
2970ea022d16SRodney W. Grimes 	DIR *dirp = NULL;
2971ea022d16SRodney W. Grimes 	struct dirent *dir;
2972ea022d16SRodney W. Grimes 	FILE *dout = NULL;
2973ea022d16SRodney W. Grimes 	char **dirlist, *dirname;
2974ea022d16SRodney W. Grimes 	int simple = 0;
2975ea022d16SRodney W. Grimes 	int freeglob = 0;
2976ea022d16SRodney W. Grimes 	glob_t gl;
2977ea022d16SRodney W. Grimes 
2978ea022d16SRodney W. Grimes 	if (strpbrk(whichf, "~{[*?") != NULL) {
297912da320bSMike Heffner 		int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
2980ea022d16SRodney W. Grimes 
2981ea022d16SRodney W. Grimes 		memset(&gl, 0, sizeof(gl));
29826d10cb2fSJonathan Lemon 		gl.gl_matchc = MAXGLOBARGS;
298375dc5f1aSMike Heffner 		flags |= GLOB_LIMIT;
2984ea022d16SRodney W. Grimes 		freeglob = 1;
2985ea022d16SRodney W. Grimes 		if (glob(whichf, flags, 0, &gl)) {
2986ea022d16SRodney W. Grimes 			reply(550, "not found");
2987ea022d16SRodney W. Grimes 			goto out;
2988ea022d16SRodney W. Grimes 		} else if (gl.gl_pathc == 0) {
2989ea022d16SRodney W. Grimes 			errno = ENOENT;
2990ea022d16SRodney W. Grimes 			perror_reply(550, whichf);
2991ea022d16SRodney W. Grimes 			goto out;
2992ea022d16SRodney W. Grimes 		}
2993ea022d16SRodney W. Grimes 		dirlist = gl.gl_pathv;
2994ea022d16SRodney W. Grimes 	} else {
2995ea022d16SRodney W. Grimes 		onefile[0] = whichf;
2996ea022d16SRodney W. Grimes 		dirlist = onefile;
2997ea022d16SRodney W. Grimes 		simple = 1;
2998ea022d16SRodney W. Grimes 	}
2999ea022d16SRodney W. Grimes 
30009aca17cbSMark Murray 	while ((dirname = *dirlist++)) {
3001ea022d16SRodney W. Grimes 		if (stat(dirname, &st) < 0) {
3002ea022d16SRodney W. Grimes 			/*
3003ea022d16SRodney W. Grimes 			 * If user typed "ls -l", etc, and the client
3004ea022d16SRodney W. Grimes 			 * used NLST, do what the user meant.
3005ea022d16SRodney W. Grimes 			 */
3006ea022d16SRodney W. Grimes 			if (dirname[0] == '-' && *dirlist == NULL &&
3007ea022d16SRodney W. Grimes 			    transflag == 0) {
3008af85d782SDavid Nugent 				retrieve(_PATH_LS " %s", dirname);
3009ea022d16SRodney W. Grimes 				goto out;
3010ea022d16SRodney W. Grimes 			}
3011ea022d16SRodney W. Grimes 			perror_reply(550, whichf);
3012ea022d16SRodney W. Grimes 			if (dout != NULL) {
3013ea022d16SRodney W. Grimes 				(void) fclose(dout);
3014ea022d16SRodney W. Grimes 				transflag = 0;
3015ea022d16SRodney W. Grimes 				data = -1;
3016ea022d16SRodney W. Grimes 				pdata = -1;
3017ea022d16SRodney W. Grimes 			}
3018ea022d16SRodney W. Grimes 			goto out;
3019ea022d16SRodney W. Grimes 		}
3020ea022d16SRodney W. Grimes 
3021ea022d16SRodney W. Grimes 		if (S_ISREG(st.st_mode)) {
3022ea022d16SRodney W. Grimes 			if (dout == NULL) {
3023ea022d16SRodney W. Grimes 				dout = dataconn("file list", (off_t)-1, "w");
3024ea022d16SRodney W. Grimes 				if (dout == NULL)
3025ea022d16SRodney W. Grimes 					goto out;
3026ea022d16SRodney W. Grimes 				transflag++;
3027ea022d16SRodney W. Grimes 			}
3028ea022d16SRodney W. Grimes 			fprintf(dout, "%s%s\n", dirname,
3029ea022d16SRodney W. Grimes 				type == TYPE_A ? "\r" : "");
3030ea022d16SRodney W. Grimes 			byte_count += strlen(dirname) + 1;
3031ea022d16SRodney W. Grimes 			continue;
3032ea022d16SRodney W. Grimes 		} else if (!S_ISDIR(st.st_mode))
3033ea022d16SRodney W. Grimes 			continue;
3034ea022d16SRodney W. Grimes 
3035ea022d16SRodney W. Grimes 		if ((dirp = opendir(dirname)) == NULL)
3036ea022d16SRodney W. Grimes 			continue;
3037ea022d16SRodney W. Grimes 
3038ea022d16SRodney W. Grimes 		while ((dir = readdir(dirp)) != NULL) {
3039ea022d16SRodney W. Grimes 			char nbuf[MAXPATHLEN];
3040ea022d16SRodney W. Grimes 
30414b82fc95SYaroslav Tykhiy 			if (recvurg) {
30424b82fc95SYaroslav Tykhiy 				myoob();
30434b82fc95SYaroslav Tykhiy 				recvurg = 0;
30444b82fc95SYaroslav Tykhiy 				transflag = 0;
30454b82fc95SYaroslav Tykhiy 				goto out;
30464b82fc95SYaroslav Tykhiy 			}
30474b82fc95SYaroslav Tykhiy 
3048ea022d16SRodney W. Grimes 			if (dir->d_name[0] == '.' && dir->d_namlen == 1)
3049ea022d16SRodney W. Grimes 				continue;
3050ea022d16SRodney W. Grimes 			if (dir->d_name[0] == '.' && dir->d_name[1] == '.' &&
3051ea022d16SRodney W. Grimes 			    dir->d_namlen == 2)
3052ea022d16SRodney W. Grimes 				continue;
3053ea022d16SRodney W. Grimes 
3054e760ef2cSWarner Losh 			snprintf(nbuf, sizeof(nbuf),
3055e760ef2cSWarner Losh 				"%s/%s", dirname, dir->d_name);
3056ea022d16SRodney W. Grimes 
3057ea022d16SRodney W. Grimes 			/*
3058ea022d16SRodney W. Grimes 			 * We have to do a stat to insure it's
3059ea022d16SRodney W. Grimes 			 * not a directory or special file.
3060ea022d16SRodney W. Grimes 			 */
3061ea022d16SRodney W. Grimes 			if (simple || (stat(nbuf, &st) == 0 &&
3062ea022d16SRodney W. Grimes 			    S_ISREG(st.st_mode))) {
3063ea022d16SRodney W. Grimes 				if (dout == NULL) {
3064ea022d16SRodney W. Grimes 					dout = dataconn("file list", (off_t)-1,
3065ea022d16SRodney W. Grimes 						"w");
3066ea022d16SRodney W. Grimes 					if (dout == NULL)
3067ea022d16SRodney W. Grimes 						goto out;
3068ea022d16SRodney W. Grimes 					transflag++;
3069ea022d16SRodney W. Grimes 				}
3070ea022d16SRodney W. Grimes 				if (nbuf[0] == '.' && nbuf[1] == '/')
3071ea022d16SRodney W. Grimes 					fprintf(dout, "%s%s\n", &nbuf[2],
3072ea022d16SRodney W. Grimes 						type == TYPE_A ? "\r" : "");
3073ea022d16SRodney W. Grimes 				else
3074ea022d16SRodney W. Grimes 					fprintf(dout, "%s%s\n", nbuf,
3075ea022d16SRodney W. Grimes 						type == TYPE_A ? "\r" : "");
3076ea022d16SRodney W. Grimes 				byte_count += strlen(nbuf) + 1;
3077ea022d16SRodney W. Grimes 			}
3078ea022d16SRodney W. Grimes 		}
3079ea022d16SRodney W. Grimes 		(void) closedir(dirp);
3080ea022d16SRodney W. Grimes 	}
3081ea022d16SRodney W. Grimes 
3082ea022d16SRodney W. Grimes 	if (dout == NULL)
3083ea022d16SRodney W. Grimes 		reply(550, "No files found.");
3084ea022d16SRodney W. Grimes 	else if (ferror(dout) != 0)
3085ea022d16SRodney W. Grimes 		perror_reply(550, "Data connection");
3086ea022d16SRodney W. Grimes 	else
3087ea022d16SRodney W. Grimes 		reply(226, "Transfer complete.");
3088ea022d16SRodney W. Grimes 
3089ea022d16SRodney W. Grimes 	transflag = 0;
3090ea022d16SRodney W. Grimes 	if (dout != NULL)
3091ea022d16SRodney W. Grimes 		(void) fclose(dout);
3092ea022d16SRodney W. Grimes 	data = -1;
3093ea022d16SRodney W. Grimes 	pdata = -1;
3094ea022d16SRodney W. Grimes out:
3095ea022d16SRodney W. Grimes 	if (freeglob) {
3096ea022d16SRodney W. Grimes 		freeglob = 0;
3097ea022d16SRodney W. Grimes 		globfree(&gl);
3098ea022d16SRodney W. Grimes 	}
3099ea022d16SRodney W. Grimes }
3100ea022d16SRodney W. Grimes 
3101cf09a206SDavid Greenman void
3102e4bc453cSWarner Losh reapchild(int signo)
3103cf09a206SDavid Greenman {
3104cf09a206SDavid Greenman 	while (wait3(NULL, WNOHANG, NULL) > 0);
3105cf09a206SDavid Greenman }
3106cf09a206SDavid Greenman 
3107b63e1fe2SPeter Wemm #ifdef OLD_SETPROCTITLE
3108ea022d16SRodney W. Grimes /*
3109ea022d16SRodney W. Grimes  * Clobber argv so ps will show what we're doing.  (Stolen from sendmail.)
3110ea022d16SRodney W. Grimes  * Warning, since this is usually started from inetd.conf, it often doesn't
3111ea022d16SRodney W. Grimes  * have much of an environment or arglist to overwrite.
3112ea022d16SRodney W. Grimes  */
3113ea022d16SRodney W. Grimes void
3114ea022d16SRodney W. Grimes setproctitle(const char *fmt, ...)
3115ea022d16SRodney W. Grimes {
3116ea022d16SRodney W. Grimes 	int i;
3117ea022d16SRodney W. Grimes 	va_list ap;
3118ea022d16SRodney W. Grimes 	char *p, *bp, ch;
3119ea022d16SRodney W. Grimes 	char buf[LINE_MAX];
3120ea022d16SRodney W. Grimes 
3121ea022d16SRodney W. Grimes 	va_start(ap, fmt);
3122ea022d16SRodney W. Grimes 	(void)vsnprintf(buf, sizeof(buf), fmt, ap);
3123ea022d16SRodney W. Grimes 
3124ea022d16SRodney W. Grimes 	/* make ps print our process name */
3125ea022d16SRodney W. Grimes 	p = Argv[0];
3126ea022d16SRodney W. Grimes 	*p++ = '-';
3127ea022d16SRodney W. Grimes 
3128ea022d16SRodney W. Grimes 	i = strlen(buf);
3129ea022d16SRodney W. Grimes 	if (i > LastArgv - p - 2) {
3130ea022d16SRodney W. Grimes 		i = LastArgv - p - 2;
3131ea022d16SRodney W. Grimes 		buf[i] = '\0';
3132ea022d16SRodney W. Grimes 	}
3133ea022d16SRodney W. Grimes 	bp = buf;
3134ea022d16SRodney W. Grimes 	while (ch = *bp++)
3135ea022d16SRodney W. Grimes 		if (ch != '\n' && ch != '\r')
3136ea022d16SRodney W. Grimes 			*p++ = ch;
3137ea022d16SRodney W. Grimes 	while (p < LastArgv)
3138ea022d16SRodney W. Grimes 		*p++ = ' ';
3139ea022d16SRodney W. Grimes }
3140b63e1fe2SPeter Wemm #endif /* OLD_SETPROCTITLE */
31413eb568f2SGuido van Rooij 
314261f891a6SPaul Traina static void
3143e4bc453cSWarner Losh logxfer(char *name, off_t size, time_t start)
31443eb568f2SGuido van Rooij {
31453eb568f2SGuido van Rooij 	char buf[1024];
31463eb568f2SGuido van Rooij 	char path[MAXPATHLEN + 1];
3147158a00b2SJohn Birrell 	time_t now;
31483eb568f2SGuido van Rooij 
31493eb568f2SGuido van Rooij 	if (statfd >= 0 && getwd(path) != NULL) {
31503eb568f2SGuido van Rooij 		time(&now);
3151e4a71114SAndrey A. Chernov 		snprintf(buf, sizeof(buf), "%.20s!%s!%s!%s/%s!%qd!%ld\n",
31523eb568f2SGuido van Rooij 			ctime(&now)+4, ident, remotehost,
3153e4a71114SAndrey A. Chernov 			path, name, (long long)size,
3154e4a71114SAndrey A. Chernov 			(long)(now - start + (now == start)));
31553eb568f2SGuido van Rooij 		write(statfd, buf, strlen(buf));
31563eb568f2SGuido van Rooij 	}
31573eb568f2SGuido van Rooij }
3158e4648f05SYaroslav Tykhiy 
3159e4648f05SYaroslav Tykhiy static char *
3160e4648f05SYaroslav Tykhiy doublequote(char *s)
3161e4648f05SYaroslav Tykhiy {
3162e4648f05SYaroslav Tykhiy 	int n;
3163e4648f05SYaroslav Tykhiy 	char *p, *s2;
3164e4648f05SYaroslav Tykhiy 
3165e4648f05SYaroslav Tykhiy 	for (p = s, n = 0; *p; p++)
3166e4648f05SYaroslav Tykhiy 		if (*p == '"')
3167e4648f05SYaroslav Tykhiy 			n++;
3168e4648f05SYaroslav Tykhiy 
3169e4648f05SYaroslav Tykhiy 	if ((s2 = malloc(p - s + n + 1)) == NULL)
3170e4648f05SYaroslav Tykhiy 		return (NULL);
3171e4648f05SYaroslav Tykhiy 
3172e4648f05SYaroslav Tykhiy 	for (p = s2; *s; s++, p++) {
3173e4648f05SYaroslav Tykhiy 		if ((*p = *s) == '"')
3174e4648f05SYaroslav Tykhiy 			*(++p) = '"';
3175e4648f05SYaroslav Tykhiy 	}
3176e4648f05SYaroslav Tykhiy 	*p = '\0';
3177e4648f05SYaroslav Tykhiy 
3178e4648f05SYaroslav Tykhiy 	return (s2);
3179e4648f05SYaroslav Tykhiy }
3180206fe568SHajimu UMEMOTO 
3181206fe568SHajimu UMEMOTO /* setup server socket for specified address family */
3182206fe568SHajimu UMEMOTO /* if af is PF_UNSPEC more than one socket may be returned */
3183206fe568SHajimu UMEMOTO /* the returned list is dynamically allocated, so caller needs to free it */
3184206fe568SHajimu UMEMOTO static int *
3185206fe568SHajimu UMEMOTO socksetup(int af, char *bindname, const char *bindport)
3186206fe568SHajimu UMEMOTO {
3187206fe568SHajimu UMEMOTO 	struct addrinfo hints, *res, *r;
3188206fe568SHajimu UMEMOTO 	int error, maxs, *s, *socks;
3189206fe568SHajimu UMEMOTO 	const int on = 1;
3190206fe568SHajimu UMEMOTO 
3191206fe568SHajimu UMEMOTO 	memset(&hints, 0, sizeof(hints));
3192206fe568SHajimu UMEMOTO 	hints.ai_flags = AI_PASSIVE;
3193206fe568SHajimu UMEMOTO 	hints.ai_family = af;
3194206fe568SHajimu UMEMOTO 	hints.ai_socktype = SOCK_STREAM;
3195206fe568SHajimu UMEMOTO 	error = getaddrinfo(bindname, bindport, &hints, &res);
3196206fe568SHajimu UMEMOTO 	if (error) {
3197206fe568SHajimu UMEMOTO 		syslog(LOG_ERR, "%s", gai_strerror(error));
3198206fe568SHajimu UMEMOTO 		if (error == EAI_SYSTEM)
3199206fe568SHajimu UMEMOTO 			syslog(LOG_ERR, "%s", strerror(errno));
3200206fe568SHajimu UMEMOTO 		return NULL;
3201206fe568SHajimu UMEMOTO 	}
3202206fe568SHajimu UMEMOTO 
3203206fe568SHajimu UMEMOTO 	/* Count max number of sockets we may open */
3204206fe568SHajimu UMEMOTO 	for (maxs = 0, r = res; r; r = r->ai_next, maxs++)
3205206fe568SHajimu UMEMOTO 		;
3206206fe568SHajimu UMEMOTO 	socks = malloc((maxs + 1) * sizeof(int));
3207206fe568SHajimu UMEMOTO 	if (!socks) {
3208206fe568SHajimu UMEMOTO 		freeaddrinfo(res);
3209206fe568SHajimu UMEMOTO 		syslog(LOG_ERR, "couldn't allocate memory for sockets");
3210206fe568SHajimu UMEMOTO 		return NULL;
3211206fe568SHajimu UMEMOTO 	}
3212206fe568SHajimu UMEMOTO 
3213206fe568SHajimu UMEMOTO 	*socks = 0;   /* num of sockets counter at start of array */
3214206fe568SHajimu UMEMOTO 	s = socks + 1;
3215206fe568SHajimu UMEMOTO 	for (r = res; r; r = r->ai_next) {
3216206fe568SHajimu UMEMOTO 		*s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
3217206fe568SHajimu UMEMOTO 		if (*s < 0) {
3218206fe568SHajimu UMEMOTO 			syslog(LOG_DEBUG, "control socket: %m");
3219206fe568SHajimu UMEMOTO 			continue;
3220206fe568SHajimu UMEMOTO 		}
3221206fe568SHajimu UMEMOTO 		if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
3222206fe568SHajimu UMEMOTO 		    &on, sizeof(on)) < 0)
3223206fe568SHajimu UMEMOTO 			syslog(LOG_WARNING,
3224206fe568SHajimu UMEMOTO 			    "control setsockopt (SO_REUSEADDR): %m");
3225206fe568SHajimu UMEMOTO 		if (r->ai_family == AF_INET6) {
3226206fe568SHajimu UMEMOTO 			if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
3227206fe568SHajimu UMEMOTO 			    &on, sizeof(on)) < 0)
3228206fe568SHajimu UMEMOTO 				syslog(LOG_WARNING,
3229206fe568SHajimu UMEMOTO 				    "control setsockopt (IPV6_V6ONLY): %m");
3230206fe568SHajimu UMEMOTO 		}
3231206fe568SHajimu UMEMOTO 		if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
3232206fe568SHajimu UMEMOTO 			syslog(LOG_DEBUG, "control bind: %m");
3233206fe568SHajimu UMEMOTO 			close(*s);
3234206fe568SHajimu UMEMOTO 			continue;
3235206fe568SHajimu UMEMOTO 		}
3236206fe568SHajimu UMEMOTO 		(*socks)++;
3237206fe568SHajimu UMEMOTO 		s++;
3238206fe568SHajimu UMEMOTO 	}
3239206fe568SHajimu UMEMOTO 
3240206fe568SHajimu UMEMOTO 	if (res)
3241206fe568SHajimu UMEMOTO 		freeaddrinfo(res);
3242206fe568SHajimu UMEMOTO 
3243206fe568SHajimu UMEMOTO 	if (*socks == 0) {
3244206fe568SHajimu UMEMOTO 		syslog(LOG_ERR, "control socket: Couldn't bind to any socket");
3245206fe568SHajimu UMEMOTO 		free(socks);
3246206fe568SHajimu UMEMOTO 		return NULL;
3247206fe568SHajimu UMEMOTO 	}
3248206fe568SHajimu UMEMOTO 	return(socks);
3249206fe568SHajimu UMEMOTO }
3250