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
|
/*
* 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_lsreq_tx(struct ospf_neighbor *n)
{
snode *sn;
struct top_hash_entry *en;
struct ospf_lsreq_packet *pk;
struct ospf_packet *op;
struct ospf_lsreq_header *lsh;
u16 length;
int i,j;
struct proto *p=&n->ifa->proto->proto;
pk=(struct ospf_lsreq_packet *)n->ifa->ip_sk->tbuf;
op=(struct ospf_packet *)n->ifa->ip_sk->tbuf;
fill_ospf_pkt_hdr(n->ifa, pk, LSREQ_P);
sn=SHEAD(n->lsrql);
if(EMPTY_SLIST(n->lsrql))
{
if(n->state==NEIGHBOR_LOADING) ospf_neigh_sm(n, INM_LOADDONE);
return;
}
i=j=(n->ifa->iface->mtu-SIPH-sizeof(struct ospf_lsreq_packet))/
sizeof(struct ospf_lsreq_header);
lsh=(struct ospf_lsreq_header *)(pk+1);
for(;i>0;i--)
{
en=(struct top_hash_entry *)sn;
lsh->padd1=0; lsh->padd2=0;
lsh->type=en->lsa.type;
lsh->rt=htonl(en->lsa.rt);
lsh->id=htonl(en->lsa.id);
DBG("Requesting %uth LSA: Type: %u, Id: %I, RT: %I\n",i, en->lsa.type,
en->lsa.id, en->lsa.rt);
lsh++;
if(sn==STAIL(n->lsrql)) break;
sn=sn->next;
}
if(i!=0) i--;
length=sizeof(struct ospf_lsreq_packet)+(j-i)*sizeof(struct ospf_lsreq_header);
op->length=htons(length);
ospf_pkt_finalize(n->ifa, op);
sk_send_to(n->ifa->ip_sk,length, n->ip, OSPF_PROTO);
OSPF_TRACE(D_PACKETS, "LS request sent to: %I", n->rid);
}
void
ospf_lsreq_rx(struct ospf_lsreq_packet *ps, struct proto *p,
struct ospf_iface *ifa, u16 size)
{
u32 nrid, myrid;
struct ospf_neighbor *n;
struct ospf_lsreq_header *lsh;
struct l_lsr_head *llsh;
list uplist;
slab *upslab;
int length;
int i,lsano;
nrid=ntohl(ps->ospf_packet.routerid);
myrid=p->cf->global->router_id;
if((n=find_neigh(ifa, nrid))==NULL)
{
OSPF_TRACE(D_PACKETS, "Received lsreq from unknown neighbor! (%I)",
nrid);
return ;
}
if(n->state<NEIGHBOR_EXCHANGE) return;
OSPF_TRACE(D_EVENTS, "Received LS req from neighbor: %I", n->ip);
ospf_neigh_sm(n, INM_HELLOREC);
length=ntohs(ps->ospf_packet.length);
lsh=(void *)(ps+1);
init_list(&uplist);
upslab=sl_new(n->pool,sizeof(struct l_lsr_head));
lsano=(length-sizeof(struct ospf_lsreq_packet))/
sizeof(struct ospf_lsreq_header);
for(i=0;i<lsano;lsh++,i++)
{
DBG("Processing LSA: ID=%I, Type=%u, Router=%I\n", ntohl(lsh->id),
lsh->type, ntohl(lsh->rt));
llsh=sl_alloc(upslab);
llsh->lsh.id=ntohl(lsh->id);
llsh->lsh.rt=ntohl(lsh->rt);
llsh->lsh.type=lsh->type;
add_tail(&uplist, NODE llsh);
if(ospf_hash_find(n->ifa->oa->gr, llsh->lsh.id, llsh->lsh.rt,
llsh->lsh.type)==NULL)
{
log("Received bad LS req from: %I looking: RT: %I, ID: %I, Type: %u",
n->ip, lsh->rt, lsh->id, lsh->type);
ospf_neigh_sm(n,INM_BADLSREQ);
rfree(upslab);
return;
}
}
ospf_lsupd_tx_list(n, &uplist);
rfree(upslab);
}
|
