lib/roken/socket.c

   1 /*
   2  * Copyright (c) 1999 - 2000 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <config.h>
  35
  36 #include "roken.h"
  37 #include <err.h>
  38
  39 /*
  40  * Set `sa' to the unitialized address of address family `af'
  41  */
  42
  43 void ROKEN_LIB_FUNCTION
  44 socket_set_any (struct sockaddr *sa, int af)
  45 {
  46     switch (af) {
  47     case AF_INET : {
  48         struct sockaddr_in *sin4 = (struct sockaddr_in *)sa;
  49
  50         memset (sin4, 0, sizeof(*sin4));
  51         sin4->sin_family = AF_INET;
  52         sin4->sin_port   = 0;
  53         sin4->sin_addr.s_addr = INADDR_ANY;
  54         break;
  55     }
  56 #ifdef HAVE_IPV6
  57     case AF_INET6 : {
  58         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
  59
  60         memset (sin6, 0, sizeof(*sin6));
  61         sin6->sin6_family = AF_INET6;
  62         sin6->sin6_port   = 0;
  63         sin6->sin6_addr   = in6addr_any;
  64         break;
  65     }
  66 #endif
  67     default :
  68         errx (1, "unknown address family %d", sa->sa_family);
  69         break;
  70     }
  71 }
  72
  73 /*
  74  * set `sa' to (`ptr', `port')
  75  */
  76
  77 void ROKEN_LIB_FUNCTION
  78 socket_set_address_and_port (struct sockaddr *sa, const void *ptr, int port)
  79 {
  80     switch (sa->sa_family) {
  81     case AF_INET : {
  82         struct sockaddr_in *sin4 = (struct sockaddr_in *)sa;
  83
  84         memset (sin4, 0, sizeof(*sin4));
  85         sin4->sin_family = AF_INET;
  86         sin4->sin_port   = port;
  87         memcpy (&sin4->sin_addr, ptr, sizeof(struct in_addr));
  88         break;
  89     }
  90 #ifdef HAVE_IPV6
  91     case AF_INET6 : {
  92         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
  93
  94         memset (sin6, 0, sizeof(*sin6));
  95         sin6->sin6_family = AF_INET6;
  96         sin6->sin6_port   = port;
  97         memcpy (&sin6->sin6_addr, ptr, sizeof(struct in6_addr));
  98         break;
  99     }
 100 #endif
 101     default :
 102         errx (1, "unknown address family %d", sa->sa_family);
 103         break;
 104     }
 105 }
 106
 107 /*
 108  * Return the size of an address of the type in `sa'
 109  */
 110
 111 size_t ROKEN_LIB_FUNCTION
 112 socket_addr_size (const struct sockaddr *sa)
 113 {
 114     switch (sa->sa_family) {
 115     case AF_INET :
 116         return sizeof(struct in_addr);
 117 #ifdef HAVE_IPV6
 118     case AF_INET6 :
 119         return sizeof(struct in6_addr);
 120 #endif
 121     default :
 122         errx (1, "unknown address family %d", sa->sa_family);
 123         break;
 124     }
 125 }
 126
 127 /*
 128  * Return the size of a `struct sockaddr' in `sa'.
 129  */
 130
 131 size_t ROKEN_LIB_FUNCTION
 132 socket_sockaddr_size (const struct sockaddr *sa)
 133 {
 134     switch (sa->sa_family) {
 135     case AF_INET :
 136         return sizeof(struct sockaddr_in);
 137 #ifdef HAVE_IPV6
 138     case AF_INET6 :
 139         return sizeof(struct sockaddr_in6);
 140 #endif
 141     default :
 142         errx (1, "unknown address family %d", sa->sa_family);
 143         break;
 144     }
 145 }
 146
 147 /*
 148  * Return the binary address of `sa'.
 149  */
 150
 151 void * ROKEN_LIB_FUNCTION
 152 socket_get_address (const struct sockaddr *sa)
 153 {
 154     switch (sa->sa_family) {
 155     case AF_INET : {
 156         const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
 157         return rk_UNCONST(&sin4->sin_addr);
 158     }
 159 #ifdef HAVE_IPV6
 160     case AF_INET6 : {
 161         const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
 162         return rk_UNCONST(&sin6->sin6_addr);
 163     }
 164 #endif
 165     default :
 166         errx (1, "unknown address family %d", sa->sa_family);
 167         break;
 168     }
 169 }
 170
 171 /*
 172  * Return the port number from `sa'.
 173  */
 174
 175 int ROKEN_LIB_FUNCTION
 176 socket_get_port (const struct sockaddr *sa)
 177 {
 178     switch (sa->sa_family) {
 179     case AF_INET : {
 180         const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
 181         return sin4->sin_port;
 182     }
 183 #ifdef HAVE_IPV6
 184     case AF_INET6 : {
 185         const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
 186         return sin6->sin6_port;
 187     }
 188 #endif
 189     default :
 190         errx (1, "unknown address family %d", sa->sa_family);
 191         break;
 192     }
 193 }
 194
 195 /*
 196  * Set the port in `sa' to `port'.
 197  */
 198
 199 void ROKEN_LIB_FUNCTION
 200 socket_set_port (struct sockaddr *sa, int port)
 201 {
 202     switch (sa->sa_family) {
 203     case AF_INET : {
 204         struct sockaddr_in *sin4 = (struct sockaddr_in *)sa;
 205         sin4->sin_port = port;
 206         break;
 207     }
 208 #ifdef HAVE_IPV6
 209     case AF_INET6 : {
 210         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
 211         sin6->sin6_port = port;
 212         break;
 213     }
 214 #endif
 215     default :
 216         errx (1, "unknown address family %d", sa->sa_family);
 217         break;
 218     }
 219 }
 220
 221 /*
 222  * Set the range of ports to use when binding with port = 0.
 223  */
 224 void ROKEN_LIB_FUNCTION
 225 socket_set_portrange (int sock, int restr, int af)
 226 {
 227 #if defined(IP_PORTRANGE)
 228         if (af == AF_INET) {
 229                 int on = restr ? IP_PORTRANGE_HIGH : IP_PORTRANGE_DEFAULT;
 230                 if (setsockopt (sock, IPPROTO_IP, IP_PORTRANGE, &on,
 231                     sizeof(on)) < 0)
 232                         warn ("setsockopt IP_PORTRANGE (ignored)");
 233         }
 234 #endif
 235 #if defined(IPV6_PORTRANGE)
 236         if (af == AF_INET6) {
 237                 int on = restr ? IPV6_PORTRANGE_HIGH :
 238                     IPV6_PORTRANGE_DEFAULT;
 239                 if (setsockopt (sock, IPPROTO_IPV6, IPV6_PORTRANGE, &on,
 240                     sizeof(on)) < 0)
 241                         warn ("setsockopt IPV6_PORTRANGE (ignored)");
 242         }
 243 #endif
 244 }
 245
 246 /*
 247  * Enable debug on `sock'.
 248  */
 249
 250 void ROKEN_LIB_FUNCTION
 251 socket_set_debug (int sock)
 252 {
 253 #if defined(SO_DEBUG) && defined(HAVE_SETSOCKOPT)
 254     int on = 1;
 255
 256     if (setsockopt (sock, SOL_SOCKET, SO_DEBUG, (void *) &on, sizeof (on)) < 0)
 257         warn ("setsockopt SO_DEBUG (ignored)");
 258 #endif
 259 }
 260
 261 /*
 262  * Set the type-of-service of `sock' to `tos'.
 263  */
 264
 265 void ROKEN_LIB_FUNCTION
 266 socket_set_tos (int sock, int tos)
 267 {
 268 #if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
 269     if (setsockopt (sock, IPPROTO_IP, IP_TOS, (void *) &tos, sizeof (int)) < 0)
 270         if (errno != EINVAL)
 271             warn ("setsockopt TOS (ignored)");
 272 #endif
 273 }
 274
 275 /*
 276  * set the reuse of addresses on `sock' to `val'.
 277  */
 278
 279 void ROKEN_LIB_FUNCTION
 280 socket_set_reuseaddr (int sock, int val)
 281 {
 282 #if defined(SO_REUSEADDR) && defined(HAVE_SETSOCKOPT)
 283     if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&val,
 284                   sizeof(val)) < 0)
 285         err (1, "setsockopt SO_REUSEADDR");
 286 #endif
 287 }
 288
 289 /*
 290  * Set the that the `sock' should bind to only IPv6 addresses.
 291  */
 292
 293 void ROKEN_LIB_FUNCTION
 294 socket_set_ipv6only (int sock, int val)
 295 {
 296 #if defined(IPV6_V6ONLY) && defined(HAVE_SETSOCKOPT)
 297     setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&val, sizeof(val));
 298 #endif
 299 }
 300
 301 #ifndef HEIMDAL_SMALLER
 302
 303 int rk_socket(int, int, int);
 304
 305 int
 306 rk_socket(int domain, int type, int protocol)
 307 {
 308     int s;
 309     s = socket (domain, type, protocol);
 310 #ifdef SOCK_CLOEXEC
 311     if ((SOCK_CLOEXEC & protocol) && s < 0 && errno == EINVAL) {
 312         protocol &= ~SOCK_CLOEXEC;
 313         s = socket (domain, type, protocol);
 314     }
 315 #endif
 316     return s;
 317 }
 318
 319 #endif /* HEIMDAL_SMALLER */