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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* routines that interface with pluto to get policy information
* Copyright (C) 2003 Michael Richardson <mcr@freeswan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: policyquery.c,v 1.1 2004/03/15 20:35:25 as Exp $
*/
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <freeswan.h>
#include <freeswan/ipsec_policy.h>
#include "libipsecpolicy.h"
static int policy_query_socket = -1;
static u_int32_t policy_seq = 1;
u_int32_t ipsec_policy_seq(void)
{
return ++policy_seq;
}
err_t ipsec_policy_init(void)
{
struct sockaddr_un sn;
if(policy_query_socket != -1) {
return NULL;
}
policy_query_socket = socket(PF_UNIX, SOCK_STREAM, 0);
if(policy_query_socket == -1) {
return "failed to open policy socket";
}
/* now connect it */
sn.sun_family = AF_UNIX;
strcpy(sn.sun_path, IPSEC_POLICY_SOCKET);
if(connect(policy_query_socket, (struct sockaddr *)&sn, sizeof(sn)) != 0) {
int saveerrno = errno;
close(policy_query_socket);
policy_query_socket=-1;
errno = saveerrno;
return "failed to connect policy socket";
}
/* okay, I think we are done */
return NULL;
}
err_t ipsec_policy_final(void)
{
if(policy_query_socket != -1) {
close(policy_query_socket);
policy_query_socket = -1;
}
return NULL;
}
err_t ipsec_policy_readmsg(int policysock,
unsigned char *buf,
size_t buflen)
{
struct ipsec_policy_msg_head ipmh;
if(read(policysock, &ipmh, sizeof(ipmh))
!= sizeof(ipmh)) {
return "read failed";
}
/* got the header, sanitize it, and find out how much more to read */
switch(ipmh.ipm_version) {
case IPSEC_POLICY_MSG_REVISION:
break;
default:
/* XXX go deal with older versions, error for now */
fprintf(stderr, "Bad magic header: %u\n", ipmh.ipm_version);
return "bad policy msg version magic";
}
if(ipmh.ipm_msg_len > buflen) {
return "buffer too small for this message";
}
buflen = ipmh.ipm_msg_len;
memcpy(buf, &ipmh, sizeof(ipmh));
buf += sizeof(ipmh);
buflen -= sizeof(ipmh);
if(read(policysock, buf, buflen) != buflen) {
return "short read from socket";
}
return NULL;
}
err_t ipsec_policy_sendrecv(unsigned char *buf,
size_t buflen)
{
err_t ret;
ipsec_policy_init();
if(write(policy_query_socket, buf, buflen)
!= buflen) {
return "write failed";
}
ret = ipsec_policy_readmsg(policy_query_socket,
buf, buflen);
ipsec_policy_final();
return ret;
}
err_t ipsec_policy_lookup(int fd, struct ipsec_policy_cmd_query *result)
{
int len;
/* clear it out */
memset(result, 0, sizeof(*result));
/* setup it up */
result->head.ipm_version = IPSEC_POLICY_MSG_REVISION;
result->head.ipm_msg_len = sizeof(*result);
result->head.ipm_msg_type = IPSEC_CMD_QUERY_HOSTPAIR;
result->head.ipm_msg_seq = ipsec_policy_seq();
/* suck out the data on the sockets */
len = sizeof(result->query_local);
if(getsockname(fd, (struct sockaddr *)&result->query_local, &len) != 0) {
return "getsockname failed";
}
len = sizeof(result->query_remote);
if(getpeername(fd, (struct sockaddr *)&result->query_remote, &len) != 0) {
return "getpeername failed";
}
return ipsec_policy_sendrecv((unsigned char *)result, sizeof(*result));
}
|
