1 /* $NetBSD: getaddrinfo_hostspec.c,v 1.2 2017/01/28 21:31:50 christos Exp $ */
2
3 /*
4 * Copyright (c) 2000 Kungliga Tekniska Högskolan
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
roken_getaddrinfo_hostspec2(const char * hostspec,int socktype,int port,struct addrinfo ** ai)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
roken_getaddrinfo_hostspec(const char * hostspec,int port,struct addrinfo ** ai)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