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