crypto/heimdal-0.6.3/lib/roken/getaddrinfo_hostspec.c

   1 /*
   2  * Copyright (c) 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 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 RCSID("$Id: getaddrinfo_hostspec.c,v 1.3 2000/07/15 12:50:32 joda Exp $");
  37 #endif
  38
  39 #include "roken.h"
  40
  41 /* getaddrinfo via string specifying host and port */
  42
  43 int
  44 roken_getaddrinfo_hostspec2(const char *hostspec,
  45                             int socktype,
  46                             int port,
  47                             struct addrinfo **ai)
  48 {
  49     const char *p;
  50     char portstr[NI_MAXSERV];
  51     char host[MAXHOSTNAMELEN];
  52     struct addrinfo hints;
  53     int hostspec_len;
  54
  55     struct hst {
  56         const char *prefix;
  57         int socktype;
  58         int protocol;
  59         int port;
  60     } *hstp, hst[] = {
  61         { "http://", SOCK_STREAM, IPPROTO_TCP, 80 },
  62         { "http/", SOCK_STREAM, IPPROTO_TCP, 80 },
  63         { "tcp/", SOCK_STREAM, IPPROTO_TCP },
  64         { "udp/", SOCK_DGRAM, IPPROTO_UDP },
  65         { NULL }
  66     };
  67
  68     memset(&hints, 0, sizeof(hints));
  69
  70     hints.ai_socktype = socktype;
  71
  72     for(hstp = hst; hstp->prefix; hstp++) {
  73         if(strncmp(hostspec, hstp->prefix, strlen(hstp->prefix)) == 0) {
  74             hints.ai_socktype = hstp->socktype;
  75             hints.ai_protocol = hstp->protocol;
  76             if(port == 0)
  77                 port = hstp->port;
  78             hostspec += strlen(hstp->prefix);
  79             break;
  80         }
  81     }
  82
  83     p = strchr (hostspec, ':');
  84     if (p != NULL) {
  85         char *end;
  86
  87         port = strtol (p + 1, &end, 0);
  88         hostspec_len = p - hostspec;
  89     } else {
  90         hostspec_len = strlen(hostspec);
  91     }
  92     snprintf (portstr, sizeof(portstr), "%u", port);
  93
  94     snprintf (host, sizeof(host), "%.*s", hostspec_len, hostspec);
  95     return getaddrinfo (host, portstr, &hints, ai);
  96 }
  97
  98 int
  99 roken_getaddrinfo_hostspec(const char *hostspec,
 100                            int port,
 101                            struct addrinfo **ai)
 102 {
 103     return roken_getaddrinfo_hostspec2(hostspec, 0, port, ai);
 104 }