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
|
/* $OpenBSD: init.c,v 1.2 2009/06/05 22:34:45 michele 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_init_prms_tlv(struct buf *, struct nbr *, u_int16_t);
int
send_init(struct nbr *nbr)
{
struct buf *buf;
u_int16_t size;
if (nbr->iface->passive)
return (0);
log_debug("send_init: neighbor ID %s", inet_ntoa(nbr->id));
if ((buf = buf_open(LDP_MAX_LEN)) == NULL)
fatal("send_init");
size = LDP_HDR_SIZE + sizeof(struct ldp_msg) + SESS_PRMS_SIZE;
gen_ldp_hdr(buf, nbr->iface, size);
size -= LDP_HDR_SIZE;
gen_msg_tlv(buf, MSG_TYPE_INIT, size);
size -= sizeof(struct ldp_msg);
gen_init_prms_tlv(buf, nbr, size);
bufferevent_write(nbr->bev, buf->buf, buf->wpos);
buf_free(buf);
return (0);
}
int
recv_init(struct nbr *nbr, char *buf, u_int16_t len)
{
struct ldp_msg *init;
struct sess_prms_tlv *sess_tlv;
log_debug("recv_init: neighbor ID %s", inet_ntoa(nbr->id));
init = (struct ldp_msg *)buf;
if ((len - TLV_HDR_LEN) < ntohs(init->length)) {
session_shutdown(nbr, S_BAD_MSG_LEN, init->msgid, init->type);
return (-1);
}
buf += sizeof(struct ldp_msg);
len -= sizeof(struct ldp_msg);
sess_tlv = (struct sess_prms_tlv *)buf;
if (len < SESS_PRMS_SIZE ||
ntohs(sess_tlv->length) != (SESS_PRMS_SIZE - TLV_HDR_LEN)) {
session_shutdown(nbr, S_BAD_TLV_LEN, init->msgid, init->type);
return (-1);
}
if (nbr->iface->keepalive < ntohs(sess_tlv->keepalive_time))
nbr->keepalive = nbr->iface->keepalive;
else
nbr->keepalive = ntohs(sess_tlv->keepalive_time);
nbr_fsm(nbr, NBR_EVT_INIT_RCVD);
return (ntohs(init->length));
}
int
gen_init_prms_tlv(struct buf *buf, struct nbr *nbr, u_int16_t size)
{
struct sess_prms_tlv parms;
/* We want just the size of the value */
size -= TLV_HDR_LEN;
bzero(&parms, sizeof(parms));
parms.type = htons(TLV_TYPE_COMMONSESSION);
parms.length = htons(size);
parms.proto_version = htons(LDP_VERSION);
parms.keepalive_time = htons(nbr->iface->keepalive);
parms.reserved = 0;
parms.pvlim = 0;
parms.max_pdu_len = 0;
parms.lsr_id = nbr->id.s_addr;
/* XXX: nbr lspace */
parms.lspace_id = 0;
return (buf_add(buf, &parms, SESS_PRMS_SIZE));
}
|
