1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T 23 * All Rights Reserved 24 * 25 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 /*LINTLIBRARY*/ 30 /*************************************************************** 31 * dial() returns an fd for an open tty-line connected to the 32 * specified remote. The caller should trap all ways to 33 * terminate, and call undial(). This will release the `lock' 34 * file and return the outgoing line to the system. This routine 35 * would prefer that the calling routine not use the `alarm()' 36 * system call, nor issue a `signal(SIGALRM, xxx)' call. 37 * If you must, then please save and restore the alarm times. 38 * The sleep() library routine is ok, though. 39 * 40 * #include <sys/types.h> 41 * #include <sys/stat.h> 42 * #include "dial.h" 43 * 44 * int dial(call); 45 * CALL call; 46 * 47 * void undial(rlfd); 48 * int rlfd; 49 * 50 * rlfd is the "remote-lne file descriptor" returned from dial. 51 * 52 * The CALL structure as (defined in dial.h): 53 * 54 * typedef struct { 55 * struct termio *attr; ptr to term attribute structure 56 * int baud; no longer used -- 57 * left in for backwards compatibility 58 * int speed; 212A modem: low=300, high=1200 59 * negative for "Any" speed 60 * char *line; device name for out-going line 61 * char *telno; ptr to tel-no digit string 62 * int modem no longer used -- 63 * left in for backwards compatibility 64 * char *device no longer used -- 65 * left in for backwards compatibility 66 * int dev_len no longer used -- 67 * left in for backwards compatibility 68 * } CALL; 69 * 70 * The error returns from dial are negative, in the range -1 71 * to -13, and their meanings are: 72 * 73 * INTRPT -1: interrupt occured 74 * D_HUNG -2: dialer hung (no return from write) 75 * NO_ANS -3: no answer (caller script failed) 76 * ILL_BD -4: illegal baud-rate 77 * A_PROB -5: acu problem (open() failure) 78 * L_PROB -6: line problem (open() failure) 79 * NO_Ldv -7: can't open Devices file 80 * DV_NT_A -8: specified device not available 81 * DV_NT_K -9: specified device not known 82 * NO_BD_A -10: no device available at requested baud-rate 83 * NO_BD_K -11: no device known at requested baud-rate 84 * DV_NT_E -12: requested speed does not match 85 * BAD_SYS -13: system not in Systems file 86 * 87 * Setting attributes in the termio structure indicated in 88 * the `attr' field of the CALL structure before passing the 89 * structure to dial(), will cause those attributes to be set 90 * before the connection is made. This can be important for 91 * some attributes such as parity and baud. 92 * 93 * With an error return (negative value), there will not be 94 * any `lock-file' entry, so no need to call undial(). 95 ***************************************************************/ 96 97 #include <stdio.h> 98 #include <stdlib.h> 99 #include <string.h> 100 #include <sys/types.h> 101 #include <unistd.h> 102 #include <setjmp.h> 103 #include <sys/stat.h> 104 #include <sys/times.h> 105 #include <fcntl.h> 106 107 #include "dial.h" 108 109 #include "uucp.h" 110 #include "uucpdefs.c" 111 112 #include "callers.c" 113 #include "conn.c" 114 #include "getargs.c" 115 #include "interface.c" 116 #include "line.c" 117 #include "stoa.c" 118 #include "strsave.c" 119 #include "sysfiles.c" 120 #include "ulockf.c" 121 122 #ifdef DATAKIT 123 #include "dkbreak.c" 124 #include "dkerr.c" 125 #include "dkdial.c" 126 #include "dkminor.c" 127 #include "dtnamer.c" 128 #endif 129 130 static int 131 rlfd; /* fd for remote comm line */ 132 133 GLOBAL jmp_buf Sjbuf; /*needed by connection routines*/ 134 135 /*VARARGS*/ 136 /*ARGSUSED*/ 137 static void 138 assert(s1,s2,i1,s3,i2) 139 char *s1, *s2, *s3; 140 int i1, i2; 141 {} /* for ASSERT in conn() */ 142 143 /*ARGSUSED*/ 144 static void 145 logent(s1,s2) 146 char *s1, *s2; 147 {} /* so we can load unlockf() */ 148 149 static void 150 cleanup(Cn) /*this is executed only in the parent process*/ 151 int Cn; /*fd for remote comm line */ 152 { 153 (void)restline(); 154 (void)setuid(Euid); 155 if(Cn > 0) { 156 (void) close(Cn); 157 } 158 159 160 rmlock((char*) NULL); /*uucp routine in ulockf.c*/ 161 return; /* code=negative for signal causing disconnect*/ 162 } 163 164 int 165 dial(call) 166 CALL call; 167 { 168 char *alt[7]; 169 char speed[10]; /* character value of speed passed to dial */ 170 171 /* set service so we know which Sysfiles entries to use, then */ 172 /* be sure can access Devices file(s). use "cu" entries ... */ 173 /* dial is more like cu than like uucico. */ 174 (void)strcpy(Progname,"cu"); 175 setservice(Progname); 176 if ( sysaccess(EACCESS_DEVICES) != 0 ) { 177 /* can't read Devices file(s) */ 178 return(NO_Ldv); 179 } 180 181 if (call.attr != NULL) { 182 if ( call.attr->c_cflag & PARENB ) { 183 Evenflag = ((call.attr->c_cflag & PARODD) ? 0 : 1); 184 Oddflag = ((call.attr->c_cflag & PARODD) ? 1 : 0); 185 } 186 line_8bit = (call.attr->c_cflag & CS8 ? 1 : 0); 187 } 188 189 if (call.speed <= 0) 190 strcpy(speed,"Any"); 191 else 192 sprintf(speed,"%d",call.speed); 193 194 /* Determine whether contents of "telno" is a system name. */ 195 if ( (call.telno != NULL) && 196 (strlen(call.telno) != strspn(call.telno,"0123456789=-*#")) ) { 197 /* use conn() for system names */ 198 rlfd = conn(call.telno); 199 } else { 200 alt[F_NAME] = "dummy"; /* to replace the Systems file fields */ 201 alt[F_TIME] = "Any"; /* needed for getto(); [F_TYPE] and */ 202 alt[F_TYPE] = ""; /* [F_PHONE] assignment below */ 203 alt[F_CLASS] = speed; 204 alt[F_PHONE] = ""; 205 alt[F_LOGIN] = ""; 206 alt[6] = ""; 207 208 if ( (call.telno != NULL) && (*call.telno != '\0') ) { 209 /* given a phone number, use an ACU */ 210 alt[F_PHONE] = call.telno; 211 alt[F_TYPE] = "ACU"; 212 } else { 213 /* otherwise, use a Direct connection */ 214 alt[F_TYPE] = "Direct"; 215 /* If device name starts with "/dev/", strip it off */ 216 /* since Devices file entries will also be stripped. */ 217 if ( (call.line != NULL) && 218 (strncmp(call.line, "/dev/", 5) == 0) ) 219 Myline = (call.line + 5); 220 else 221 Myline = call.line; 222 } 223 224 #ifdef forfutureuse 225 if (call->class != NULL) 226 alt[F_TYPE] = call->class; 227 #endif 228 229 230 rlfd = getto(alt); 231 } 232 if (rlfd < 0) 233 switch (Uerror) { 234 case SS_NO_DEVICE: return(NO_BD_A); 235 case SS_DIAL_FAILED: return(D_HUNG); 236 case SS_LOCKED_DEVICE: return(DV_NT_A); 237 case SS_BADSYSTEM: return(BAD_SYS); 238 case SS_CANT_ACCESS_DEVICE: return(L_PROB); 239 case SS_CHAT_FAILED: return(NO_ANS); 240 default: return(-Uerror); 241 } 242 (void)savline(); 243 if ((call.attr) && ioctl(rlfd, TCSETA, call.attr) < 0) { 244 perror("stty for remote"); 245 return(L_PROB); 246 } 247 Euid = geteuid(); 248 if(setuid(getuid()) && setgid(getgid()) < 0) 249 undial(rlfd); 250 return(rlfd); 251 } 252 253 /* 254 * undial(fd) 255 */ 256 void 257 undial(fd) 258 int fd; 259 { 260 sethup(fd); 261 sleep(2); 262 cleanup(fd); 263 } 264