contrib/bind-9.2.4rc7/lib/bind/isc/ctl_p.c

   1 #if !defined(lint) && !defined(SABER)
   2 static const char rcsid[] = "$Id: ctl_p.c,v 1.1.2.2 2004/03/17 00:40:14 marka Exp $";
   3 #endif /* not lint */
   4
   5 /*
   6  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   7  * Copyright (c) 1998,1999 by Internet Software Consortium.
   8  *
   9  * Permission to use, copy, modify, and distribute this software for any
  10  * purpose with or without fee is hereby granted, provided that the above
  11  * copyright notice and this permission notice appear in all copies.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  14  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  16  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  19  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20  */
  21
  22 /* Extern. */
  23
  24 #include "port_before.h"
  25
  26 #include <sys/param.h>
  27 #include <sys/file.h>
  28 #include <sys/socket.h>
  29 #include <sys/un.h>
  30
  31 #include <netinet/in.h>
  32 #include <arpa/nameser.h>
  33 #include <arpa/inet.h>
  34
  35 #include <errno.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <time.h>
  40
  41 #include <isc/assertions.h>
  42 #include <isc/eventlib.h>
  43 #include <isc/logging.h>
  44 #include <isc/memcluster.h>
  45 #include <isc/ctl.h>
  46
  47 #include "ctl_p.h"
  48
  49 #include "port_after.h"
  50
  51 /* Constants. */
  52
  53 const char * const ctl_sevnames[] = {
  54         "debug", "warning", "error"
  55 };
  56
  57 /* Public. */
  58
  59 /*
  60  * ctl_logger()
  61  *      if ctl_startup()'s caller didn't specify a logger, this one
  62  *      is used.  this pollutes stderr with all kinds of trash so it will
  63  *      probably never be used in real applications.
  64  */
  65 void
  66 ctl_logger(enum ctl_severity severity, const char *format, ...) {
  67         va_list ap;
  68         static const char me[] = "ctl_logger";
  69
  70         fprintf(stderr, "%s(%s): ", me, ctl_sevnames[severity]);
  71         va_start(ap, format);
  72         vfprintf(stderr, format, ap);
  73         va_end(ap);
  74         fputc('\n', stderr);
  75 }
  76
  77 int
  78 ctl_bufget(struct ctl_buf *buf, ctl_logfunc logger) {
  79         static const char me[] = "ctl_bufget";
  80
  81         REQUIRE(!allocated_p(*buf) && buf->used == 0U);
  82         buf->text = memget(MAX_LINELEN);
  83         if (!allocated_p(*buf)) {
  84                 (*logger)(ctl_error, "%s: getmem: %s", me, strerror(errno));
  85                 return (-1);
  86         }
  87         buf->used = 0;
  88         return (0);
  89 }
  90
  91 void
  92 ctl_bufput(struct ctl_buf *buf) {
  93
  94         REQUIRE(allocated_p(*buf));
  95         memput(buf->text, MAX_LINELEN);
  96         buf->text = NULL;
  97         buf->used = 0;
  98 }
  99
 100 const char *
 101 ctl_sa_ntop(const struct sockaddr *sa,
 102             char *buf, size_t size,
 103             ctl_logfunc logger)
 104 {
 105         static const char me[] = "ctl_sa_ntop";
 106         static const char punt[] = "[0].-1";
 107         char tmp[INET6_ADDRSTRLEN];
 108
 109         switch (sa->sa_family) {
 110         case AF_INET6: {
 111                 const struct sockaddr_in6 *in6 =
 112                                         (const struct sockaddr_in6 *) sa;
 113
 114                 if (inet_ntop(in6->sin6_family, &in6->sin6_addr, tmp, sizeof tmp)
 115                     == NULL) {
 116                         (*logger)(ctl_error, "%s: inet_ntop(%u %04x): %s",
 117                                   me, in6->sin6_family,
 118                                   in6->sin6_port, strerror(errno));
 119                         return (punt);
 120                 }
 121                 if (strlen(tmp) + sizeof "[].65535" > size) {
 122                         (*logger)(ctl_error, "%s: buffer overflow", me);
 123                         return (punt);
 124                 }
 125                 (void) sprintf(buf, "[%s].%u", tmp, ntohs(in6->sin6_port));
 126                 return (buf);
 127             }
 128         case AF_INET: {
 129                 const struct sockaddr_in *in =
 130                                               (const struct sockaddr_in *) sa;
 131
 132                 if (inet_ntop(in->sin_family, &in->sin_addr, tmp, sizeof tmp)
 133                     == NULL) {
 134                         (*logger)(ctl_error, "%s: inet_ntop(%u %04x %08x): %s",
 135                                   me, in->sin_family,
 136                                   in->sin_port, in->sin_addr.s_addr,
 137                                   strerror(errno));
 138                         return (punt);
 139                 }
 140                 if (strlen(tmp) + sizeof "[].65535" > size) {
 141                         (*logger)(ctl_error, "%s: buffer overflow", me);
 142                         return (punt);
 143                 }
 144                 (void) sprintf(buf, "[%s].%u", tmp, ntohs(in->sin_port));
 145                 return (buf);
 146             }
 147 #ifndef NO_SOCKADDR_UN
 148         case AF_UNIX: {
 149                 const struct sockaddr_un *un =
 150                                               (const struct sockaddr_un *) sa;
 151                 unsigned int x = sizeof un->sun_path;
 152
 153                 if (x > size)
 154                         x = size;
 155                 strncpy(buf, un->sun_path, x - 1);
 156                 buf[x - 1] = '\0';
 157                 return (buf);
 158             }
 159 #endif
 160         default:
 161                 return (punt);
 162         }
 163 }
 164
 165 void
 166 ctl_sa_copy(const struct sockaddr *src, struct sockaddr *dst) {
 167         switch (src->sa_family) {
 168         case AF_INET6:
 169                 *((struct sockaddr_in6 *)dst) =
 170                                          *((const struct sockaddr_in6 *)src);
 171                 break;
 172         case AF_INET:
 173                 *((struct sockaddr_in *)dst) =
 174                                           *((const struct sockaddr_in *)src);
 175                 break;
 176 #ifndef NO_SOCKADDR_UN
 177         case AF_UNIX:
 178                 *((struct sockaddr_un *)dst) =
 179                                           *((const struct sockaddr_un *)src);
 180                 break;
 181 #endif
 182         default:
 183                 *dst = *src;
 184                 break;
 185         }
 186 }