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
|
/*
* BIRD -- OSPF
*
* (c) 2000 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "ospf.h"
void
ospf_lsupd_tx(struct ospf_neighbor *n)
{
/* FIXME Go on! */
}
void /* I send all I received in LSREQ */
ospf_lsupd_tx_list(struct ospf_neighbor *n, list *l)
{
struct l_lsr_head *llsh;
u16 len;
u32 lsano;
struct top_hash_entry *en;
struct ospf_lsupd_packet *pk;
struct ospf_packet *op;
void *pktpos;
u8 ii;
u8 *jj=n->ifa->ip_sk->tbuf;
if(HEAD(*l)==NULL) return;
pk=(struct ospf_lsupd_packet *)n->ifa->ip_sk->tbuf;
op=(struct ospf_packet *)n->ifa->ip_sk->tbuf;
DBG("LSupd: 1st packet\n");
fill_ospf_pkt_hdr(n->ifa, pk, LSUPD);
len=SIPH+sizeof(struct ospf_lsupd_packet);
lsano=0;
pktpos=(pk+1);
WALK_LIST(llsh, *l)
{
en=ospf_hash_find(n->ifa->oa->gr,llsh->lsh.id,llsh->lsh.rt,llsh->lsh.type);
DBG("Sending ID=%u, Type=%u, RT=%u\n", llsh->lsh.id, llsh->lsh.type,
llsh->lsh.rt);
if((len+sizeof(struct ospf_lsa_header)+en->lsa.length)>n->ifa->iface->mtu)
{
pk->lsano=htonl(lsano);
op->length=htons(len);
ospf_pkt_finalize(n->ifa, op);
for(ii=0;ii<(len-SIPH);ii+=4)
DBG("Out dump: %d,%d,%d,%d\n", *(jj+ii), *(jj+ii+1), *(jj+ii+2), *(jj+ii+3));
sk_send_to(n->ifa->ip_sk,len, n->ip, OSPF_PROTO);
DBG("LSupd: next packet\n");
fill_ospf_pkt_hdr(n->ifa, pk, LSUPD);
len=SIPH+sizeof(struct ospf_lsupd_packet);
lsano=0;
pktpos=(pk+1);
}
htonlsah(&(en->lsa), pktpos);
pktpos=pktpos+sizeof(struct ospf_lsa_header);
htonlsab(en->lsa_body, pktpos, en->lsa.type, en->lsa.length);
pktpos=pktpos+en->lsa.length-sizeof(struct ospf_lsa_header);
len=len+en->lsa.length;
lsano++;
}
pk->lsano=htonl(lsano);
op->length=htons(len-SIPH);
ospf_pkt_finalize(n->ifa, op);
for(ii=0;ii<(len-SIPH);ii+=4)
DBG("Out dump: %d,%d,%d,%d\n", *(jj+ii), *(jj+ii+1), *(jj+ii+2), *(jj+ii+3));
sk_send_to(n->ifa->ip_sk,len, n->ip, OSPF_PROTO);
DBG("LSupd: sent\n");
}
void
ospf_lsupd_rx(struct ospf_lsupd_packet *ps, struct proto *p,
struct ospf_iface *ifa, u16 size)
{
u32 area,nrid,myrid;
struct ospf_neighbor *n;
struct ospf_lsa_header *lsa;
struct ospf_area *oa;
struct proto_ospf *po=(struct proto_ospf *)p;
u16 length;
u8 i;
nrid=ntohl(ps->ospf_packet.routerid);
myrid=p->cf->global->router_id;
if((n=find_neigh(ifa, nrid))==NULL)
{
debug("%s: Received lsupd from unknown neigbor! (%u)\n", p->name,
nrid);
return ;
}
if(n->state<NEIGHBOR_EXCHANGE)
{
debug("%s: Received lsupd in lesser state than EXCHANGE from (%u)\n",
p->name);
return;
}
lsa=(struct ospf_lsa_header *)(ps+1);
area=htonl(ps->ospf_packet.areaid);
oa=ospf_find_area((struct proto_ospf *)p,area);
for(i=0;i<ntohl(ps->lsano);i++,
lsa=(struct ospf_lsa_header *)(((u8 *)lsa)+ntohs(lsa->length)))
{
struct ospf_lsa_header lsatmp;
struct top_hash_entry *lsadb;
if(lsa->checksum!=lsasum_check(lsa,NULL,po))
{
log("Received bad lsa checksum from %u\n",n->rid);
continue;
}
if((lsa->type<LSA_T_RT)||(lsa->type>LSA_T_EXT))
{
log("Unknown LSA type from %u\n",n->rid);
continue;
}
if((lsa->type==LSA_T_EXT)&&oa->stub)
{
log("Received External LSA in stub area from %u\n",n->rid);
continue;
}
ntohlsah(lsa,&lsatmp);
DBG("Processing update Type: %u ID: %u RT: %u\n",lsa->type,
ntohl(lsa->id), ntohl(lsa->rt));
lsadb=ospf_hash_find_header(oa->gr, &lsatmp);
if((lsatmp.age==LSA_MAXAGE)&&(lsadb==NULL))
{
struct ospf_neighbor *n=NULL;
struct ospf_iface *ifa=NULL;
int flag=0;
WALK_LIST(NODE ifa,po->iface_list)
WALK_LIST(NODE n,ifa->neigh_list)
if((n->state==NEIGHBOR_EXCHANGE)&&(n->state==NEIGHBOR_LOADING))
flag=1;
if(flag==0)
{
add_ack_list(n,lsa);
continue;
}
}
if((lsadb==NULL)||(lsa_comp(&lsatmp,&lsadb->lsa)==CMP_NEWER))
{
struct ospf_neighbor *n=NULL;
struct ospf_iface *ifa=NULL;
/* FIXME self originated? */
if(lsadb && ((lsadb->inst_t-now)<MINLSARRIVAL)) continue;
/* Remove old from all ret lists */
WALK_LIST(NODE ifa,po->iface_list)
WALK_LIST(NODE n,ifa->neigh_list)
{
struct top_hash_entry *en;
if((en=ospf_hash_find_header(n->lsrth,&lsadb->lsa))!=NULL)
s_rem_node(SNODE en);
}
/* Install new */
memcpy(&lsadb->lsa,&lsatmp,sizeof(struct ospf_lsa_header));
lsadb->inst_t=now;
if(lsadb->lsa_body!=NULL) mb_free(lsadb->lsa_body);
lsadb->lsa_body=mb_alloc(p->pool,lsadb->lsa.length-
sizeof(struct ospf_lsa_header));
ntohlsab(lsa+1,lsadb->lsa_body,lsadb->lsa.type,lsadb->lsa.length);
/* FIXME lsa_flood(n,lsadb) */
/* FIXME ack_lsa() */
continue;
}
/* FIXME pg144 (6)?? */
if(lsa_comp(&lsatmp,&lsadb->lsa)==CMP_SAME)
{
struct top_hash_entry *en;
if((en=ospf_hash_find_header(n->lsrth,&lsadb->lsa))!=NULL)
s_rem_node(SNODE en);
/* FIXME ack_lsa() */
continue;
}
if((lsadb->lsa.age==LSA_MAXAGE)&&(lsadb->lsa.sn==LSA_MAXSEQNO)) continue;
/* FIXME lsa_send(n,lsa) */
}
}
|
