1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* $OpenBSD: pt_tcp.c,v 1.12 2004/08/08 19:04:25 deraadt Exp $ */
/*
* Copyright (c) 2004 Pedro Martelletto <pedro@openbsd.org>
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <unistd.h>
#include <syslog.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <netdb.h>
#include <errno.h>
#include "portald.h"
/*
* Keys should follow the format: tcp/[4||6]/host/port/["priv"]
*/
int
portal_tcp(struct portal_cred *pcr, char *key, char **v, int ks, int *fdp)
{
char **tp, *tokens[5];
int priv, s, tc, n;
struct addrinfo aih, *ai, *ail;
if (!strlen(key) || key[strlen(key) - 1] == '/')
return (EINVAL);
tc = 0;
for (tp = tokens; tp < &tokens[5] &&
(*tp = strsep(&key, "/")) != NULL;)
if (**tp != '\0') {
tp++;
tc++;
}
if (tc < 3)
return (EINVAL);
memset(&aih, 0x0, sizeof(aih));
aih.ai_socktype = SOCK_STREAM;
aih.ai_family = PF_UNSPEC;
priv = 0;
tp = tokens;
if (tc > 3) {
if (!strcmp(tokens[1], "4"))
aih.ai_family = PF_INET;
else if (!strcmp(tokens[1], "6"))
aih.ai_family = PF_INET6;
if (aih.ai_family != PF_UNSPEC) {
tp++;
tc--;
}
if (tc > 4)
return (EINVAL);
if (tc > 3) {
if (!strcmp(tp[tc - 1], "priv")) {
if (pcr->pcr_uid == 0)
priv = 1;
else
return (EPERM);
} else
return (EINVAL);
}
}
n = getaddrinfo(tp[1], tp[2], &aih, &ail);
if (n) {
syslog(LOG_ERR, "getaddrinfo: %s", gai_strerror(n));
return (EINVAL);
}
s = -1;
for (ai = ail; ai != NULL; ai = ai->ai_next) {
if (priv)
s = rresvport(NULL);
else
s = socket(ai->ai_family, ai->ai_socktype,
ai->ai_protocol);
if (s < 0) {
syslog(LOG_ERR, "socket: %m");
continue;
}
n = connect(s, ai->ai_addr, ai->ai_addrlen);
if (!n)
break;
syslog(LOG_ERR, "connect: %m");
close(s);
s = -1;
}
freeaddrinfo(ail);
if (s == -1)
return (errno);
*fdp = s;
return (0);
}
|
