1 /*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1998,1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /* Extern. */
19
20 #include "port_before.h"
21
22 #include <sys/param.h>
23 #include <sys/file.h>
24 #include <sys/socket.h>
25 #include <sys/un.h>
26
27 #include <netinet/in.h>
28 #include <arpa/nameser.h>
29 #include <arpa/inet.h>
30
31 #include <errno.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <time.h>
36
37 #include <isc/assertions.h>
38 #include <isc/eventlib.h>
39 #include <isc/logging.h>
40 #include <isc/memcluster.h>
41 #include <isc/ctl.h>
42
43 #include "ctl_p.h"
44
45 #include "port_after.h"
46
47 /* Constants. */
48
49 const char * const ctl_sevnames[] = {
50 "debug", "warning", "error"
51 };
52
53 /* Public. */
54
55 /*%
56 * ctl_logger()
57 * if ctl_startup()'s caller didn't specify a logger, this one
58 * is used. this pollutes stderr with all kinds of trash so it will
59 * probably never be used in real applications.
60 */
61 void
ctl_logger(enum ctl_severity severity,const char * format,...)62 ctl_logger(enum ctl_severity severity, const char *format, ...) {
63 va_list ap;
64 static const char me[] = "ctl_logger";
65
66 fprintf(stderr, "%s(%s): ", me, ctl_sevnames[severity]);
67 va_start(ap, format);
68 vfprintf(stderr, format, ap);
69 va_end(ap);
70 fputc('\n', stderr);
71 }
72
73 int
ctl_bufget(struct ctl_buf * buf,ctl_logfunc logger)74 ctl_bufget(struct ctl_buf *buf, ctl_logfunc logger) {
75 static const char me[] = "ctl_bufget";
76
77 REQUIRE(!allocated_p(*buf) && buf->used == 0U);
78 buf->text = memget(MAX_LINELEN);
79 if (!allocated_p(*buf)) {
80 (*logger)(ctl_error, "%s: getmem: %s", me, strerror(errno));
81 return (-1);
82 }
83 buf->used = 0;
84 return (0);
85 }
86
87 void
ctl_bufput(struct ctl_buf * buf)88 ctl_bufput(struct ctl_buf *buf) {
89
90 REQUIRE(allocated_p(*buf));
91 memput(buf->text, MAX_LINELEN);
92 buf->text = NULL;
93 buf->used = 0;
94 }
95
96 const char *
ctl_sa_ntop(const struct sockaddr * sa,char * buf,size_t size,ctl_logfunc logger)97 ctl_sa_ntop(const struct sockaddr *sa,
98 char *buf, size_t size,
99 ctl_logfunc logger)
100 {
101 static const char me[] = "ctl_sa_ntop";
102 static const char punt[] = "[0].-1";
103 char tmp[INET6_ADDRSTRLEN];
104
105 switch (sa->sa_family) {
106 case AF_INET6: {
107 const struct sockaddr_in6 *in6 =
108 (const struct sockaddr_in6 *) sa;
109
110 if (inet_ntop(in6->sin6_family, &in6->sin6_addr, tmp, sizeof tmp)
111 == NULL) {
112 (*logger)(ctl_error, "%s: inet_ntop(%u %04x): %s",
113 me, in6->sin6_family,
114 in6->sin6_port, strerror(errno));
115 return (punt);
116 }
117 if (strlen(tmp) + sizeof "[].65535" > size) {
118 (*logger)(ctl_error, "%s: buffer overflow", me);
119 return (punt);
120 }
121 (void) sprintf(buf, "[%s].%u", tmp, ntohs(in6->sin6_port));
122 return (buf);
123 }
124 case AF_INET: {
125 const struct sockaddr_in *in =
126 (const struct sockaddr_in *) sa;
127
128 if (inet_ntop(in->sin_family, &in->sin_addr, tmp, sizeof tmp)
129 == NULL) {
130 (*logger)(ctl_error, "%s: inet_ntop(%u %04x %08x): %s",
131 me, in->sin_family,
132 in->sin_port, in->sin_addr.s_addr,
133 strerror(errno));
134 return (punt);
135 }
136 if (strlen(tmp) + sizeof "[].65535" > size) {
137 (*logger)(ctl_error, "%s: buffer overflow", me);
138 return (punt);
139 }
140 (void) sprintf(buf, "[%s].%u", tmp, ntohs(in->sin_port));
141 return (buf);
142 }
143 #ifndef NO_SOCKADDR_UN
144 case AF_UNIX: {
145 const struct sockaddr_un *un =
146 (const struct sockaddr_un *) sa;
147 unsigned int x = sizeof un->sun_path;
148
149 if (x > size)
150 x = size;
151 strncpy(buf, un->sun_path, x - 1);
152 buf[x - 1] = '\0';
153 return (buf);
154 }
155 #endif
156 default:
157 return (punt);
158 }
159 }
160
161 void
ctl_sa_copy(const struct sockaddr * src,struct sockaddr * dst)162 ctl_sa_copy(const struct sockaddr *src, struct sockaddr *dst) {
163 switch (src->sa_family) {
164 case AF_INET6:
165 *((struct sockaddr_in6 *)dst) =
166 *((const struct sockaddr_in6 *)src);
167 break;
168 case AF_INET:
169 *((struct sockaddr_in *)dst) =
170 *((const struct sockaddr_in *)src);
171 break;
172 #ifndef NO_SOCKADDR_UN
173 case AF_UNIX:
174 *((struct sockaddr_un *)dst) =
175 *((const struct sockaddr_un *)src);
176 break;
177 #endif
178 default:
179 *dst = *src;
180 break;
181 }
182 }
183
184 /*! \file */
185