usr/src/lib/libresolv2/common/isc/ctl_p.c

   1 static const char rcsid[] = "$Id: ctl_p.c,v 1.4 2005/04/27 04:56:35 sra Exp $";
   2
   3 /*
   4  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (c) 1998,1999 by Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  17  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Extern. */
  21
  22 #include "port_before.h"
  23
  24 #include <sys/param.h>
  25 #include <sys/file.h>
  26 #include <sys/socket.h>
  27 #include <sys/un.h>
  28
  29 #include <netinet/in.h>
  30 #include <arpa/nameser.h>
  31 #include <arpa/inet.h>
  32
  33 #include <errno.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <time.h>
  38
  39 #include <isc/assertions.h>
  40 #include <isc/eventlib.h>
  41 #include <isc/logging.h>
  42 #include <isc/memcluster.h>
  43 #include <isc/ctl.h>
  44
  45 #include "ctl_p.h"
  46
  47 #include "port_after.h"
  48
  49 /* Constants. */
  50
  51 const char * const ctl_sevnames[] = {
  52         "debug", "warning", "error"
  53 };
  54
  55 /* Public. */
  56
  57 /*%
  58  * ctl_logger()
  59  *      if ctl_startup()'s caller didn't specify a logger, this one
  60  *      is used.  this pollutes stderr with all kinds of trash so it will
  61  *      probably never be used in real applications.
  62  */
  63 void
  64 ctl_logger(enum ctl_severity severity, const char *format, ...) {
  65         va_list ap;
  66         static const char me[] = "ctl_logger";
  67
  68         fprintf(stderr, "%s(%s): ", me, ctl_sevnames[severity]);
  69         va_start(ap, format);
  70         vfprintf(stderr, format, ap);
  71         va_end(ap);
  72         fputc('\n', stderr);
  73 }
  74
  75 int
  76 ctl_bufget(struct ctl_buf *buf, ctl_logfunc logger) {
  77         static const char me[] = "ctl_bufget";
  78
  79         REQUIRE(!allocated_p(*buf) && buf->used == 0U);
  80         buf->text = memget(MAX_LINELEN);
  81         if (!allocated_p(*buf)) {
  82                 (*logger)(ctl_error, "%s: getmem: %s", me, strerror(errno));
  83                 return (-1);
  84         }
  85         buf->used = 0;
  86         return (0);
  87 }
  88
  89 void
  90 ctl_bufput(struct ctl_buf *buf) {
  91
  92         REQUIRE(allocated_p(*buf));
  93         memput(buf->text, MAX_LINELEN);
  94         buf->text = NULL;
  95         buf->used = 0;
  96 }
  97
  98 const char *
  99 ctl_sa_ntop(const struct sockaddr *sa,
 100             char *buf, size_t size,
 101             ctl_logfunc logger)
 102 {
 103         static const char me[] = "ctl_sa_ntop";
 104         static const char punt[] = "[0].-1";
 105         char tmp[INET6_ADDRSTRLEN];
 106
 107         switch (sa->sa_family) {
 108         case AF_INET6: {
 109                 const struct sockaddr_in6 *in6 =
 110                                         (const struct sockaddr_in6 *) sa;
 111
 112                 if (inet_ntop(in6->sin6_family, &in6->sin6_addr, tmp, sizeof tmp)
 113                     == NULL) {
 114                         (*logger)(ctl_error, "%s: inet_ntop(%u %04x): %s",
 115                                   me, in6->sin6_family,
 116                                   in6->sin6_port, strerror(errno));
 117                         return (punt);
 118                 }
 119                 if (strlen(tmp) + sizeof "[].65535" > size) {
 120                         (*logger)(ctl_error, "%s: buffer overflow", me);
 121                         return (punt);
 122                 }
 123                 (void) sprintf(buf, "[%s].%u", tmp, ntohs(in6->sin6_port));
 124                 return (buf);
 125             }
 126         case AF_INET: {
 127                 const struct sockaddr_in *in =
 128                                               (const struct sockaddr_in *) sa;
 129
 130                 if (inet_ntop(in->sin_family, &in->sin_addr, tmp, sizeof tmp)
 131                     == NULL) {
 132                         (*logger)(ctl_error, "%s: inet_ntop(%u %04x %08x): %s",
 133                                   me, in->sin_family,
 134                                   in->sin_port, in->sin_addr.s_addr,
 135                                   strerror(errno));
 136                         return (punt);
 137                 }
 138                 if (strlen(tmp) + sizeof "[].65535" > size) {
 139                         (*logger)(ctl_error, "%s: buffer overflow", me);
 140                         return (punt);
 141                 }
 142                 (void) sprintf(buf, "[%s].%u", tmp, ntohs(in->sin_port));
 143                 return (buf);
 144             }
 145 #ifndef NO_SOCKADDR_UN
 146         case AF_UNIX: {
 147                 const struct sockaddr_un *un =
 148                                               (const struct sockaddr_un *) sa;
 149                 unsigned int x = sizeof un->sun_path;
 150
 151                 if (x > size)
 152                         x = size;
 153                 strncpy(buf, un->sun_path, x - 1);
 154                 buf[x - 1] = '\0';
 155                 return (buf);
 156             }
 157 #endif
 158         default:
 159                 return (punt);
 160         }
 161 }
 162
 163 void
 164 ctl_sa_copy(const struct sockaddr *src, struct sockaddr *dst) {
 165         switch (src->sa_family) {
 166         case AF_INET6:
 167                 *((struct sockaddr_in6 *)dst) =
 168                                          *((const struct sockaddr_in6 *)src);
 169                 break;
 170         case AF_INET:
 171                 *((struct sockaddr_in *)dst) =
 172                                           *((const struct sockaddr_in *)src);
 173                 break;
 174 #ifndef NO_SOCKADDR_UN
 175         case AF_UNIX:
 176                 *((struct sockaddr_un *)dst) =
 177                                           *((const struct sockaddr_un *)src);
 178                 break;
 179 #endif
 180         default:
 181                 *dst = *src;
 182                 break;
 183         }
 184 }
 185
 186 /*! \file */