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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/* $OpenBSD: pfe_route.c,v 1.6 2014/06/25 11:05:15 reyk Exp $ */
/*
* Copyright (c) 2009 - 2011 Reyk Floeter <reyk@openbsd.org>
*
* 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/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/route.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <event.h>
#include <string.h>
#include <errno.h>
#include <openssl/ssl.h>
#include "relayd.h"
struct relay_rtmsg {
struct rt_msghdr rm_hdr;
union {
struct {
struct sockaddr_in rm_dst;
struct sockaddr_in rm_gateway;
struct sockaddr_in rm_netmask;
struct sockaddr_rtlabel rm_label;
} u4;
struct {
struct sockaddr_in6 rm_dst;
struct sockaddr_in6 rm_gateway;
struct sockaddr_in6 rm_netmask;
struct sockaddr_rtlabel rm_label;
} u6;
} rm_u;
};
void
init_routes(struct relayd *env)
{
u_int rtfilter;
if (!(env->sc_flags & F_NEEDRT))
return;
if ((env->sc_rtsock = socket(AF_ROUTE, SOCK_RAW, 0)) == -1)
fatal("init_routes: failed to open routing socket");
rtfilter = ROUTE_FILTER(0);
if (setsockopt(env->sc_rtsock, AF_ROUTE, ROUTE_MSGFILTER,
&rtfilter, sizeof(rtfilter)) == -1)
fatal("init_routes: ROUTE_MSGFILTER");
}
void
sync_routes(struct relayd *env, struct router *rt)
{
struct netroute *nr;
struct host *host;
char buf[MAXHOSTNAMELEN];
struct ctl_netroute crt;
if (!(env->sc_flags & F_NEEDRT))
return;
TAILQ_FOREACH(nr, &rt->rt_netroutes, nr_entry) {
print_host(&nr->nr_conf.ss, buf, sizeof(buf));
TAILQ_FOREACH(host, &rt->rt_gwtable->hosts, entry) {
if (host->up == HOST_UNKNOWN)
continue;
log_debug("%s: "
"router %s route %s/%d gateway %s %s priority %d",
__func__,
rt->rt_conf.name, buf, nr->nr_conf.prefixlen,
host->conf.name,
HOST_ISUP(host->up) ? "up" : "down",
host->conf.priority);
crt.up = host->up;
memcpy(&crt.nr, &nr->nr_conf, sizeof(nr->nr_conf));
memcpy(&crt.host, &host->conf, sizeof(host->conf));
memcpy(&crt.rt, &rt->rt_conf, sizeof(rt->rt_conf));
proc_compose_imsg(env->sc_ps, PROC_PARENT, -1,
IMSG_RTMSG, -1, &crt, sizeof(crt));
}
}
}
int
pfe_route(struct relayd *env, struct ctl_netroute *crt)
{
struct relay_rtmsg rm;
struct sockaddr_rtlabel sr;
struct sockaddr_storage *gw;
struct sockaddr_in *s4;
struct sockaddr_in6 *s6;
size_t len = 0;
char *gwname;
int i = 0;
gw = &crt->host.ss;
gwname = crt->host.name;
bzero(&rm, sizeof(rm));
bzero(&sr, sizeof(sr));
rm.rm_hdr.rtm_msglen = len;
rm.rm_hdr.rtm_version = RTM_VERSION;
rm.rm_hdr.rtm_type = HOST_ISUP(crt->up) ? RTM_ADD : RTM_DELETE;
rm.rm_hdr.rtm_flags = RTF_STATIC | RTF_GATEWAY | RTF_MPATH;
rm.rm_hdr.rtm_seq = env->sc_rtseq++;
rm.rm_hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
rm.rm_hdr.rtm_tableid = crt->rt.rtable;
rm.rm_hdr.rtm_priority = crt->host.priority;
if (strlen(crt->rt.label)) {
rm.rm_hdr.rtm_addrs |= RTA_LABEL;
sr.sr_len = sizeof(sr);
if (snprintf(sr.sr_label, sizeof(sr.sr_label),
"%s", crt->rt.label) == -1)
goto bad;
}
if (crt->nr.ss.ss_family == AF_INET) {
rm.rm_hdr.rtm_msglen = len =
sizeof(rm.rm_hdr) + sizeof(rm.rm_u.u4);
bcopy(&sr, &rm.rm_u.u4.rm_label, sizeof(sr));
s4 = &rm.rm_u.u4.rm_dst;
s4->sin_family = AF_INET;
s4->sin_len = sizeof(rm.rm_u.u4.rm_dst);
s4->sin_addr.s_addr =
((struct sockaddr_in *)&crt->nr.ss)->sin_addr.s_addr;
s4 = &rm.rm_u.u4.rm_gateway;
s4->sin_family = AF_INET;
s4->sin_len = sizeof(rm.rm_u.u4.rm_gateway);
s4->sin_addr.s_addr =
((struct sockaddr_in *)gw)->sin_addr.s_addr;
rm.rm_hdr.rtm_addrs |= RTA_NETMASK;
s4 = &rm.rm_u.u4.rm_netmask;
s4->sin_family = AF_INET;
s4->sin_len = sizeof(rm.rm_u.u4.rm_netmask);
if (crt->nr.prefixlen)
s4->sin_addr.s_addr =
htonl(0xffffffff << (32 - crt->nr.prefixlen));
else if (crt->nr.prefixlen < 0)
rm.rm_hdr.rtm_flags |= RTF_HOST;
} else if (crt->nr.ss.ss_family == AF_INET6) {
rm.rm_hdr.rtm_msglen = len =
sizeof(rm.rm_hdr) + sizeof(rm.rm_u.u6);
bcopy(&sr, &rm.rm_u.u6.rm_label, sizeof(sr));
s6 = &rm.rm_u.u6.rm_dst;
bcopy(((struct sockaddr_in6 *)&crt->nr.ss),
s6, sizeof(*s6));
s6->sin6_family = AF_INET6;
s6->sin6_len = sizeof(*s6);
s6 = &rm.rm_u.u6.rm_gateway;
bcopy(((struct sockaddr_in6 *)gw), s6, sizeof(*s6));
s6->sin6_family = AF_INET6;
s6->sin6_len = sizeof(*s6);
rm.rm_hdr.rtm_addrs |= RTA_NETMASK;
s6 = &rm.rm_u.u6.rm_netmask;
s6->sin6_family = AF_INET6;
s6->sin6_len = sizeof(*s6);
if (crt->nr.prefixlen) {
for (i = 0; i < crt->nr.prefixlen / 8; i++)
s6->sin6_addr.s6_addr[i] = 0xff;
i = crt->nr.prefixlen % 8;
if (i)
s6->sin6_addr.s6_addr[crt->nr.prefixlen
/ 8] = 0xff00 >> i;
} else if (crt->nr.prefixlen < 0)
rm.rm_hdr.rtm_flags |= RTF_HOST;
} else
fatal("pfe_route: invalid address family");
retry:
if (write(env->sc_rtsock, &rm, len) == -1) {
switch (errno) {
case EEXIST:
case ESRCH:
if (rm.rm_hdr.rtm_type == RTM_ADD) {
rm.rm_hdr.rtm_type = RTM_CHANGE;
goto retry;
} else if (rm.rm_hdr.rtm_type == RTM_DELETE) {
/* Ignore */
break;
}
/* FALLTHROUGH */
default:
goto bad;
}
}
log_debug("%s: gateway %s %s", __func__, gwname,
HOST_ISUP(crt->up) ? "added" : "deleted");
return (0);
bad:
log_debug("%s: failed to %s gateway %s: %d %s", __func__,
HOST_ISUP(crt->up) ? "add" : "delete", gwname,
errno, strerror(errno));
return (-1);
}
|
