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
|
/* $OpenBSD: notification.c,v 1.7 2010/05/26 13:56:08 nicm Exp $ */
/*
* Copyright (c) 2009 Michele Marchetto <michele@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/uio.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <net/if_dl.h>
#include <unistd.h>
#include <errno.h>
#include <event.h>
#include <stdlib.h>
#include <string.h>
#include "ldpd.h"
#include "ldp.h"
#include "log.h"
#include "ldpe.h"
int gen_status_tlv(struct ibuf *, u_int32_t, u_int32_t, u_int32_t);
void
send_notification_nbr(struct nbr *nbr, u_int32_t status, u_int32_t msgid,
u_int32_t type)
{
struct ibuf *buf;
if (nbr->iface->passive)
return;
buf = send_notification(status, nbr->iface, msgid, type);
evbuf_enqueue(&nbr->wbuf, buf);
}
struct ibuf *
send_notification(u_int32_t status, struct iface *iface, u_int32_t msgid,
u_int32_t type)
{
struct ibuf *buf;
u_int16_t size;
if ((buf = ibuf_open(LDP_MAX_LEN)) == NULL)
fatal("send_notification");
size = LDP_HDR_SIZE + sizeof(struct ldp_msg) + STATUS_SIZE;
gen_ldp_hdr(buf, iface, size);
size -= LDP_HDR_SIZE;
gen_msg_tlv(buf, MSG_TYPE_NOTIFICATION, size);
size -= sizeof(struct ldp_msg);
gen_status_tlv(buf, status, msgid, type);
return (buf);
}
int
recv_notification(struct nbr *nbr, char *buf, u_int16_t len)
{
struct ldp_msg *not;
struct status_tlv *st;
log_debug("recv_notification: neighbor ID %s", inet_ntoa(nbr->id));
not = (struct ldp_msg *)buf;
if ((len - TLV_HDR_LEN) < ntohs(not->length)) {
session_shutdown(nbr, S_BAD_MSG_LEN, not->msgid, not->type);
return (-1);
}
buf += sizeof(struct ldp_msg);
len -= sizeof(struct ldp_msg);
st = (struct status_tlv *)buf;
if (len < STATUS_SIZE ||
(STATUS_SIZE - TLV_HDR_LEN) != ntohs(st->length)) {
session_shutdown(nbr, S_BAD_TLV_LEN, not->msgid, not->type);
return (-1);
}
if (st->status_code & htonl(STATUS_FATAL))
log_warnx("recieved notification from neighbor %s: %s",
inet_ntoa(nbr->id),
notification_name(ntohl(st->status_code)));
else
log_debug("recieved non-fatal notification from neighbor "
"%s: %s", inet_ntoa(nbr->id),
notification_name(ntohl(st->status_code)));
if (st->status_code & htonl(STATUS_FATAL)) {
nbr_fsm(nbr, NBR_EVT_CLOSE_SESSION);
return (-1);
}
return (ntohs(not->length));
}
int
gen_status_tlv(struct ibuf *buf, u_int32_t status, u_int32_t msgid,
u_int32_t type)
{
struct status_tlv st;
bzero(&st, sizeof(st));
st.type = htons(TLV_TYPE_STATUS);
st.length = htons(STATUS_TLV_LEN);
st.status_code = htonl(status);
st.msg_id = msgid;
st.msg_type = type;
return (ibuf_add(buf, &st, STATUS_SIZE));
}
|
