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-rw-r--r--proto/ospf/hello.c2
-rw-r--r--proto/ospf/lsupd.c111
-rw-r--r--proto/ospf/ospf.h3
-rw-r--r--proto/ospf/packet.c10
-rw-r--r--proto/ospf/packet.h13
5 files changed, 79 insertions, 60 deletions
diff --git a/proto/ospf/hello.c b/proto/ospf/hello.c
index 70fb654..3d7d8de 100644
--- a/proto/ospf/hello.c
+++ b/proto/ospf/hello.c
@@ -297,7 +297,7 @@ ospf_hello_send(timer *timer, int poll, struct ospf_neighbor *dirn)
pp = (u32 *) (((u8 *) pkt) + sizeof(struct ospf_hello_packet));
WALK_LIST(neigh, ifa->neigh_list)
{
- if ((i+1) * sizeof(u32) + sizeof(struct ospf_hello_packet) > ospf_pkt_maxsize(ifa))
+ if ((i+1) * sizeof(u32) + sizeof(struct ospf_hello_packet) > ospf_pkt_bufsize(ifa))
{
OSPF_TRACE(D_PACKETS, "Too many neighbors on the interface!");
break;
diff --git a/proto/ospf/lsupd.c b/proto/ospf/lsupd.c
index 62e7eac..fb757d0 100644
--- a/proto/ospf/lsupd.c
+++ b/proto/ospf/lsupd.c
@@ -330,67 +330,74 @@ ospf_lsupd_flood(struct proto_ospf *po,
void /* I send all I received in LSREQ */
ospf_lsupd_send_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;
struct ospf_area *oa = n->ifa->oa;
- struct proto_ospf *po = oa->po;
- struct proto *p = &po->proto;
- void *pktpos;
-
- if (EMPTY_LIST(*l))
- return;
-
- DBG("LSupd: 1st packet\n");
-
- pk= ospf_tx_buffer(n->ifa);
- op = &pk->ospf_packet;
+ struct proto *p = &oa->po->proto;
+ struct l_lsr_head *lsr;
+ struct top_hash_entry *en;
+ struct ospf_lsupd_packet *pkt;
+ u32 len, len2, lsano;
+ char *buf;
- ospf_pkt_fill_hdr(n->ifa, pk, LSUPD_P);
- len = sizeof(struct ospf_lsupd_packet);
- lsano = 0;
- pktpos = (pk + 1);
+ pkt = ospf_tx_buffer(n->ifa);
+ buf = (void *) pkt;
- WALK_LIST(llsh, *l)
+ lsr = HEAD(*l);
+ while(NODE_NEXT(lsr))
{
- u32 domain = ospf_lsa_domain(llsh->lsh.type, n->ifa);
- if ((en = ospf_hash_find(po->gr, domain, llsh->lsh.id,
- llsh->lsh.rt, llsh->lsh.type)) == NULL)
- continue; /* Probably flushed LSA */
- /* FIXME This is a bug! I cannot flush LSA that is in lsrt */
-
- DBG("Sending LSA: Type=%u, ID=%R, RT=%R, SN: 0x%x, Age: %u\n",
- llsh->lsh.type, llsh->lsh.id, llsh->lsh.rt, en->lsa.sn, en->lsa.age);
- if (((u32) (len + en->lsa.length)) > ospf_pkt_maxsize(n->ifa))
+ /* Prepare the packet */
+ ospf_pkt_fill_hdr(n->ifa, pkt, LSUPD_P);
+ len = sizeof(struct ospf_lsupd_packet);
+ lsano = 0;
+
+ /* Fill the packet with LSAs */
+ while(NODE_NEXT(lsr))
{
- pk->lsano = htonl(lsano);
- op->length = htons(len);
+ u32 domain = ospf_lsa_domain(lsr->lsh.type, n->ifa);
+ en = ospf_hash_find(oa->po->gr, domain, lsr->lsh.id, lsr->lsh.rt, lsr->lsh.type);
+ if (en == NULL)
+ {
+ /* Probably flushed LSA, this should not happen */
+ log(L_WARN "OSPF: LSA disappeared (Type: %04x, Id: %R, Rt: %R)",
+ lsr->lsh.type, lsr->lsh.id, lsr->lsh.rt);
+ lsr = NODE_NEXT(lsr);
+ continue;
+ }
- OSPF_PACKET(ospf_dump_lsupd, pk, "LSUPD packet sent to %I via %s", n->ip, n->ifa->iface->name);
- ospf_send_to(n->ifa, n->ip);
+ len2 = len + en->lsa.length;
+ if (len2 > ospf_pkt_maxsize(n->ifa))
+ {
+ /* The packet if full, stop adding LSAs and sent it */
+ if (lsano > 0)
+ break;
+
+ /* LSA is larger than MTU, check buffer size */
+ if (len2 > ospf_pkt_bufsize(n->ifa))
+ {
+ /* Cannot fit in a tx buffer, skip that */
+ log(L_WARN "OSPF: LSA too large to send (Type: %04x, Id: %R, Rt: %R)",
+ lsr->lsh.type, lsr->lsh.id, lsr->lsh.rt);
+ lsr = NODE_NEXT(lsr);
+ continue;
+ }
+ }
- DBG("LSupd: next packet\n");
- ospf_pkt_fill_hdr(n->ifa, pk, LSUPD_P);
- len = sizeof(struct ospf_lsupd_packet);
- lsano = 0;
- pktpos = (pk + 1);
+ /* Copy the LSA to the packet */
+ htonlsah(&(en->lsa), (struct ospf_lsa_header *) (buf + len));
+ htonlsab(en->lsa_body, buf + len + sizeof(struct ospf_lsa_header),
+ en->lsa.length - sizeof(struct ospf_lsa_header));
+ len = len2;
+ lsano++;
+ lsr = NODE_NEXT(lsr);
}
- htonlsah(&(en->lsa), pktpos);
- pktpos = pktpos + sizeof(struct ospf_lsa_header);
- htonlsab(en->lsa_body, pktpos, en->lsa.length - sizeof(struct ospf_lsa_header));
- pktpos = pktpos + en->lsa.length - sizeof(struct ospf_lsa_header);
- len += en->lsa.length;
- lsano++;
- }
- if (lsano > 0)
- {
- pk->lsano = htonl(lsano);
- op->length = htons(len);
- OSPF_PACKET(ospf_dump_lsupd, pk, "LSUPD packet sent to %I via %s", n->ip, n->ifa->iface->name);
+ if (lsano == 0)
+ break;
+
+ /* Send the packet */
+ pkt->lsano = htonl(lsano);
+ pkt->ospf_packet.length = htons(len);
+ OSPF_PACKET(ospf_dump_lsupd, pkt, "LSUPD packet sent to %I via %s",
+ n->ip, n->ifa->iface->name);
ospf_send_to(n->ifa, n->ip);
}
}
diff --git a/proto/ospf/ospf.h b/proto/ospf/ospf.h
index 103ca55..1ae83c1 100644
--- a/proto/ospf/ospf.h
+++ b/proto/ospf/ospf.h
@@ -10,7 +10,6 @@
#define _BIRD_OSPF_H_
#define MAXNETS 10
-#define OSPF_VLINK_MTU 576 /* RFC2328 - A.1 */
#define OSPF_MAX_PKT_SIZE 65536
/*
* RFC 2328 says, maximum packet size is 65535
@@ -53,11 +52,13 @@ do { if ((p->debug & D_PACKETS) || OSPF_FORCE_DEBUG) \
#ifndef IPV6
#define OSPFv2 1
#define OSPF_VERSION 2
+#define OSPF_VLINK_MTU 576 /* RFC 2328 A.1 */
#define AllSPFRouters ipa_from_u32(0xe0000005) /* 224.0.0.5 */
#define AllDRouters ipa_from_u32(0xe0000006) /* 224.0.0.6 */
#else
#define OSPFv3 1
#define OSPF_VERSION 3
+#define OSPF_VLINK_MTU 1280 /* RFC 5340 A.1 */
#define AllSPFRouters _MI(0xFF020000, 0, 0, 5) /* FF02::5 */
#define AllDRouters _MI(0xFF020000, 0, 0, 6) /* FF02::6 */
#endif
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index 6ae29a8..bfc17d7 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -39,19 +39,17 @@ ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
unsigned
ospf_pkt_maxsize(struct ospf_iface *ifa)
{
- /* For virtual links use mtu=576, can be mtu < 576? */
unsigned mtu = (ifa->type == OSPF_IT_VLINK) ? OSPF_VLINK_MTU : ifa->iface->mtu;
- unsigned add = 0;
+ unsigned headers = SIZE_OF_IP_HEADER;
#ifdef OSPFv2
- add = ((ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0);
+ if (ifa->autype == OSPF_AUTH_CRYPT)
+ headers += OSPF_AUTH_CRYPT_SIZE;
#endif
- return ((mtu <= ifa->iface->mtu) ? mtu : ifa->iface->mtu) -
- SIZE_OF_IP_HEADER - add;
+ return mtu - headers;
}
-
#ifdef OSPFv2
static void
diff --git a/proto/ospf/packet.h b/proto/ospf/packet.h
index 1c74a70..c0185b9 100644
--- a/proto/ospf/packet.h
+++ b/proto/ospf/packet.h
@@ -21,4 +21,17 @@ void ospf_send_to(struct ospf_iface *ifa, ip_addr ip);
static inline void * ospf_tx_buffer(struct ospf_iface *ifa) { return ifa->sk->tbuf; }
+static inline unsigned
+ospf_pkt_bufsize(struct ospf_iface *ifa)
+{
+#ifdef OSPFv2
+ unsigned headers = (ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0;
+#else
+ unsigned headers = 0;
+#endif
+
+ return ifa->sk->tbsize - headers;
+}
+
+
#endif /* _BIRD_OSPF_PACKET_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 19:42:28 +0100