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      1 /*	$NetBSD: getaddrinfo_hostspec.c,v 1.2 2017/01/28 21:31:50 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <config.h>
     37 
     38 #include <krb5/roken.h>
     39 
     40 /* getaddrinfo via string specifying host and port */
     41 
     42 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
     43 roken_getaddrinfo_hostspec2(const char *hostspec,
     44 			    int socktype,
     45 			    int port,
     46 			    struct addrinfo **ai)
     47 {
     48     const char *p;
     49     char portstr[NI_MAXSERV];
     50     char host[MAXHOSTNAMELEN];
     51     struct addrinfo hints;
     52     int hostspec_len;
     53 
     54     struct hst {
     55 	const char *prefix;
     56 	int socktype;
     57 	int protocol;
     58 	int port;
     59     } *hstp, hst[] = {
     60 	{ "http://", SOCK_STREAM, IPPROTO_TCP, 80 },
     61 	{ "http/", SOCK_STREAM, IPPROTO_TCP, 80 },
     62 	{ "tcp/", SOCK_STREAM, IPPROTO_TCP, 0 },
     63 	{ "udp/", SOCK_DGRAM, IPPROTO_UDP, 0 },
     64 	{ NULL, 0, 0, 0 }
     65     };
     66 
     67     memset(&hints, 0, sizeof(hints));
     68 
     69     hints.ai_socktype = socktype;
     70 
     71     for(hstp = hst; hstp->prefix; hstp++) {
     72 	if(strncmp(hostspec, hstp->prefix, strlen(hstp->prefix)) == 0) {
     73 	    hints.ai_socktype = hstp->socktype;
     74 	    hints.ai_protocol = hstp->protocol;
     75 	    if(port == 0)
     76 		port = hstp->port;
     77 	    hostspec += strlen(hstp->prefix);
     78 	    break;
     79 	}
     80     }
     81 
     82     p = strchr (hostspec, ':');
     83     if (p != NULL) {
     84 	char *end;
     85 
     86 	port = strtol (p + 1, &end, 0);
     87 	hostspec_len = p - hostspec;
     88     } else {
     89 	hostspec_len = strlen(hostspec);
     90     }
     91     snprintf (portstr, sizeof(portstr), "%u", port);
     92 
     93     snprintf (host, sizeof(host), "%.*s", hostspec_len, hostspec);
     94     return getaddrinfo (host, portstr, &hints, ai);
     95 }
     96 
     97 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
     98 roken_getaddrinfo_hostspec(const char *hostspec,
     99 			   int port,
    100 			   struct addrinfo **ai)
    101 {
    102     return roken_getaddrinfo_hostspec2(hostspec, 0, port, ai);
    103 }
    104