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
|
/* $OpenBSD: config.c,v 1.17 2004/01/07 01:15:54 henning Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@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/socket.h>
#include <sys/mman.h>
#include <errno.h>
#include <ifaddrs.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "bgpd.h"
#include "session.h"
void *sconf;
u_int32_t get_bgpid(void);
u_int32_t get_id(struct peer *);
int
merge_config(struct bgpd_config *xconf, struct bgpd_config *conf,
struct peer *peer_l)
{
struct peer *p;
/* merge conf (new) into xconf (old) */
if (!conf->as) {
logit(LOG_CRIT, "configuration error: AS not given");
return (1);
}
if (xconf->as != conf->as)
xconf->as = conf->as;
if (conf->bgpid && xconf->bgpid != conf->bgpid)
xconf->bgpid = conf->bgpid;
if (!xconf->bgpid)
xconf->bgpid = get_bgpid();
if (conf->holdtime && !xconf->holdtime)
xconf->holdtime = conf->holdtime;
if (!conf->holdtime && xconf->holdtime)
conf->holdtime = xconf->holdtime;
if (conf->min_holdtime && !xconf->min_holdtime)
xconf->min_holdtime = conf->min_holdtime;
if (!conf->min_holdtime && xconf->min_holdtime)
conf->min_holdtime = xconf->min_holdtime;
if (!xconf->min_holdtime)
xconf->min_holdtime = conf->min_holdtime = MIN_HOLDTIME;
memcpy(&xconf->listen_addr, &conf->listen_addr,
sizeof(xconf->listen_addr));
xconf->flags = conf->flags;
xconf->log = conf->log;
xconf->holdtime = conf->holdtime;
xconf->min_holdtime = conf->min_holdtime;
for (p = peer_l; p != NULL; p = p->next) {
p->conf.ebgp = (p->conf.remote_as != xconf->as);
if (!p->conf.id)
p->conf.id = get_id(p);
}
return (0);
}
u_int32_t
get_bgpid(void)
{
struct ifaddrs *ifap, *ifa;
u_int32_t ip = 0, cur, localnet;
localnet = inet_addr("127.0.0.0");
if (getifaddrs(&ifap) == -1)
fatal("getifaddrs");
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_INET)
continue;
cur = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
if ((cur & localnet) == localnet) /* skip 127/8 */
continue;
if (cur > ip)
ip = cur;
}
freeifaddrs(ifap);
return (ip);
}
u_int32_t
get_id(struct peer *p)
{
/*
* XXX this collides with multiviews and will need more clue later XXX
*/
return (ntohl(p->conf.remote_addr.sin_addr.s_addr));
}
|
