mount_portal(8): Raise WARNS to 6.
[dragonfly.git] / sbin / mount_portal / pt_tcp.c
CommitLineData
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1/*
2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * All rights reserved.
5 *
6 * This code is derived from software donated to Berkeley by
7 * Jan-Simon Pendry.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)pt_tcp.c 8.5 (Berkeley) 4/28/95
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38 *
39 * $FreeBSD: src/sbin/mount_portal/pt_tcp.c,v 1.9 1999/08/28 00:13:38 peter Exp $
e929265d 40 * $DragonFly: src/sbin/mount_portal/pt_tcp.c,v 1.5 2005/11/06 12:36:40 swildner Exp $
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41 */
42
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43#include <errno.h>
44#include <stdlib.h>
d5c90ae7 45#include <string.h>
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46#include <unistd.h>
47#include <sys/types.h>
48#include <sys/param.h>
49#include <sys/syslog.h>
50#include <sys/socket.h>
51#include <netinet/in.h>
52#include <arpa/inet.h>
53#include <netdb.h>
54
55#include "portald.h"
56
57/*
58 * Key will be tcp/host/port[/"priv"]
59 * Create a TCP socket connected to the
60 * requested host and port.
61 * Some trailing suffix values have special meanings.
62 * An unrecognized suffix is an error.
63 */
e929265d 64int
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65portal_tcp(struct portal_cred *pcr, char *key, char **v, int kso __unused,
66 int *fdp)
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67{
68 char host[MAXHOSTNAMELEN];
69 char port[MAXHOSTNAMELEN];
70 char *p = key + (v[1] ? strlen(v[1]) : 0);
71 char *q;
72 struct hostent *hp;
73 struct servent *sp;
74 struct in_addr **ipp;
75 struct in_addr *ip[2];
76 struct in_addr ina;
77 u_short s_port;
78 int priv = 0;
79 struct sockaddr_in sain;
80
81 q = strchr(p, '/');
92f258c4 82 if (q == 0 || (size_t)(q - p) >= sizeof(host))
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83 return (EINVAL);
84 *q = '\0';
85 strcpy(host, p);
86 p = q + 1;
87
88 q = strchr(p, '/');
89 if (q)
90 *q = '\0';
91 if (strlen(p) >= sizeof(port))
92 return (EINVAL);
93 strcpy(port, p);
94 if (q) {
95 p = q + 1;
96 if (strcmp(p, "priv") == 0) {
97 if (pcr->pcr_uid == 0)
98 priv = 1;
99 else
100 return (EPERM);
101 } else {
102 return (EINVAL);
103 }
104 }
105
106 hp = gethostbyname(host);
107 if (hp != 0) {
108 ipp = (struct in_addr **) hp->h_addr_list;
109 } else {
110 ina.s_addr = inet_addr(host);
111 if (ina.s_addr == INADDR_NONE)
112 return (EINVAL);
113 ip[0] = &ina;
114 ip[1] = 0;
115 ipp = ip;
116 }
117#ifdef DEBUG
118 printf ("inet address for %s is %s\n", host, inet_ntoa(*ipp[0]));
119#endif
120
121 sp = getservbyname(port, "tcp");
122 if (sp != NULL) {
123 s_port = (u_short)sp->s_port;
124 } else {
125 s_port = strtoul(port, &p, 0);
126 if (s_port == 0 || *p != '\0')
127 return (EINVAL);
128 s_port = htons(s_port);
129 }
130#ifdef DEBUG
131 printf ("port number for %s is %d\n", port, (int)ntohs(s_port));
132#endif
133
134 memset(&sain, 0, sizeof(sain));
135 sain.sin_len = sizeof(sain);
136 sain.sin_family = AF_INET;
137 sain.sin_port = s_port;
138
139 while (ipp[0]) {
140 int so;
141
142 if (priv)
902ec341 143 so = rresvport(NULL);
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144 else
145 so = socket(AF_INET, SOCK_STREAM, 0);
146 if (so < 0) {
147 syslog(LOG_ERR, "socket: %m");
148 return (errno);
149 }
150
151 sain.sin_addr = *ipp[0];
152 if (connect(so, (struct sockaddr *) &sain, sizeof(sain)) == 0) {
153 *fdp = so;
154 return (0);
155 }
7cee7052 156 close(so);
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157
158 ipp++;
159 }
160
161 return (errno);
162}