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-rw-r--r--proto/ospf/dbdes.c21
-rw-r--r--proto/ospf/dbdes.h2
-rw-r--r--proto/ospf/hello.c16
-rw-r--r--proto/ospf/hello.h4
-rw-r--r--proto/ospf/lsack.c22
-rw-r--r--proto/ospf/lsack.h2
-rw-r--r--proto/ospf/lsreq.c17
-rw-r--r--proto/ospf/lsreq.h2
-rw-r--r--proto/ospf/lsupd.c21
-rw-r--r--proto/ospf/lsupd.h2
-rw-r--r--proto/ospf/packet.c77
11 files changed, 72 insertions, 114 deletions
diff --git a/proto/ospf/dbdes.c b/proto/ospf/dbdes.c
index 3d8ec50..54dd71f 100644
--- a/proto/ospf/dbdes.c
+++ b/proto/ospf/dbdes.c
@@ -182,26 +182,11 @@ ospf_dbdes_reqladd(struct ospf_dbdes_packet *ps, struct ospf_neighbor *n)
void
ospf_dbdes_receive(struct ospf_dbdes_packet *ps,
- struct ospf_iface *ifa, u16 size)
+ struct ospf_iface *ifa, struct ospf_neighbor *n)
{
struct proto *p = (struct proto *) ifa->proto;
- u32 nrid, myrid = p->cf->global->router_id;
- struct ospf_neighbor *n;
-
- nrid = ntohl(((struct ospf_packet *) ps)->routerid);
-
-
- if ((n = find_neigh(ifa, nrid)) == NULL)
- {
- OSPF_TRACE(D_PACKETS, "Received dbdes from unknown neigbor! %I.", nrid);
- return;
- }
-
- if (ifa->iface->mtu < size)
- {
- OSPF_TRACE(D_PACKETS, "Received dbdes larger than MTU from %I!", n->ip);
- return;
- }
+ u32 myrid = p->cf->global->router_id;
+ unsigned int size = ntohs(ps->ospf_packet.length);
OSPF_TRACE(D_PACKETS, "Received dbdes from %I via %s.", n->ip,
ifa->iface->name);
diff --git a/proto/ospf/dbdes.h b/proto/ospf/dbdes.h
index b332ecb..c5ffe59 100644
--- a/proto/ospf/dbdes.h
+++ b/proto/ospf/dbdes.h
@@ -12,6 +12,6 @@
void ospf_dbdes_send(struct ospf_neighbor *n);
void ospf_dbdes_receive(struct ospf_dbdes_packet *ps,
- struct ospf_iface *ifa, u16 size);
+ struct ospf_iface *ifa, struct ospf_neighbor *n);
#endif /* _BIRD_OSPF_DBDES_H_ */
diff --git a/proto/ospf/hello.c b/proto/ospf/hello.c
index 6e1fa92..a318a67 100644
--- a/proto/ospf/hello.c
+++ b/proto/ospf/hello.c
@@ -10,18 +10,14 @@
void
ospf_hello_receive(struct ospf_hello_packet *ps,
- struct ospf_iface *ifa, int size, ip_addr faddr)
+ struct ospf_iface *ifa, struct ospf_neighbor *n, ip_addr faddr)
{
- u32 nrid, *pnrid;
- struct ospf_neighbor *n;
- u8 i, twoway, oldpriority;
+ u32 *pnrid;
ip_addr olddr, oldbdr;
ip_addr mask;
char *beg = "Bad OSPF hello packet from ", *rec = " received: ";
- int eligible = 0;
struct proto *p = (struct proto *) ifa->proto;
-
- nrid = ntohl(((struct ospf_packet *) ps)->routerid);
+ unsigned int size = ntohs(ps->ospf_packet.length), i, twoway, oldpriority, eligible = 0;
OSPF_TRACE(D_PACKETS, "Received hello from %I via %s", faddr,
ifa->iface->name);
@@ -30,7 +26,7 @@ ospf_hello_receive(struct ospf_hello_packet *ps,
if ((unsigned) ipa_mklen(mask) != ifa->iface->addr->pxlen)
{
- log(L_ERR, "%s%I%sbad netmask %I.", beg, nrid, rec, mask);
+ log(L_ERR "%s%I%sbad netmask %I.", beg, faddr, rec, mask);
return;
}
@@ -54,7 +50,7 @@ ospf_hello_receive(struct ospf_hello_packet *ps,
return;
}
- if ((n = find_neigh(ifa, nrid)) == NULL)
+ if (!n)
{
if ((ifa->type == OSPF_IT_NBMA))
{
@@ -92,7 +88,7 @@ ospf_hello_receive(struct ospf_hello_packet *ps,
n = ospf_neighbor_new(ifa);
- n->rid = nrid;
+ n->rid = ntohl(((struct ospf_packet *) ps)->routerid);
n->ip = faddr;
n->dr = ps->dr;
ipa_ntoh(n->dr);
diff --git a/proto/ospf/hello.h b/proto/ospf/hello.h
index 5b41857..d535935 100644
--- a/proto/ospf/hello.h
+++ b/proto/ospf/hello.h
@@ -11,7 +11,7 @@
#define _BIRD_OSPF_HELLO_H_
void ospf_hello_receive(struct ospf_hello_packet *ps,
- struct ospf_iface *ifa, int size, ip_addr faddr);
-void ospf_hello_send(timer * timer, int poll, struct ospf_neighbor *dirn);
+ struct ospf_iface *ifa, struct ospf_neighbor *n, ip_addr faddr);
+void ospf_hello_send(timer *timer, int poll, struct ospf_neighbor *dirn);
#endif /* _BIRD_OSPF_HELLO_H_ */
diff --git a/proto/ospf/lsack.c b/proto/ospf/lsack.c
index 3a4e965..7d7238c 100644
--- a/proto/ospf/lsack.c
+++ b/proto/ospf/lsack.c
@@ -119,25 +119,13 @@ ospf_lsack_send(struct ospf_neighbor *n, int queue)
void
ospf_lsack_receive(struct ospf_lsack_packet *ps,
- struct ospf_iface *ifa, u16 size)
+ struct ospf_iface *ifa, struct ospf_neighbor *n)
{
- u32 nrid, myrid;
- struct ospf_neighbor *n;
struct ospf_lsa_header lsa, *plsa;
- u16 nolsa, i;
+ u16 nolsa;
struct top_hash_entry *en;
- u16 lenn = ntohs(ps->ospf_packet.length);
struct proto *p = (struct proto *) ifa->proto;
-
- nrid = ntohl(ps->ospf_packet.routerid);
-
- myrid = p->cf->global->router_id;
-
- if ((n = find_neigh(ifa, nrid)) == NULL)
- {
- OSPF_TRACE(D_PACKETS, "Received LS ack from unknown neigbor! (%I)", nrid);
- return;
- }
+ unsigned int size = ntohs(ps->ospf_packet.length), i;
OSPF_TRACE(D_PACKETS, "Received LS ack from %I", n->ip);
ospf_neigh_sm(n, INM_HELLOREC);
@@ -145,10 +133,10 @@ ospf_lsack_receive(struct ospf_lsack_packet *ps,
if (n->state < NEIGHBOR_EXCHANGE)
return;
- nolsa = (lenn - sizeof(struct ospf_lsack_packet)) /
+ nolsa = (size - sizeof(struct ospf_lsack_packet)) /
sizeof(struct ospf_lsa_header);
- if ((nolsa < 1) || ((lenn - sizeof(struct ospf_lsack_packet)) !=
+ if ((nolsa < 1) || ((size - sizeof(struct ospf_lsack_packet)) !=
(nolsa * sizeof(struct ospf_lsa_header))))
{
log(L_ERR "Received corrupted LS ack from %I", n->ip);
diff --git a/proto/ospf/lsack.h b/proto/ospf/lsack.h
index d56abc5..05cc22f 100644
--- a/proto/ospf/lsack.h
+++ b/proto/ospf/lsack.h
@@ -17,7 +17,7 @@ struct lsah_n
};
void ospf_lsack_receive(struct ospf_lsack_packet *ps,
- struct ospf_iface *ifa, u16 size);
+ struct ospf_iface *ifa, struct ospf_neighbor *n);
void ospf_lsack_send(struct ospf_neighbor *n, int queue);
void ospf_lsack_enqueue(struct ospf_neighbor *n, struct ospf_lsa_header *h,
int queue);
diff --git a/proto/ospf/lsreq.c b/proto/ospf/lsreq.c
index 046e149..98d2d06 100644
--- a/proto/ospf/lsreq.c
+++ b/proto/ospf/lsreq.c
@@ -66,36 +66,27 @@ ospf_lsreq_send(struct ospf_neighbor *n)
void
ospf_lsreq_receive(struct ospf_lsreq_packet *ps,
- struct ospf_iface *ifa, u16 size)
+ struct ospf_iface *ifa, struct ospf_neighbor *n)
{
- u32 nrid;
- struct ospf_neighbor *n;
struct ospf_lsreq_header *lsh;
struct l_lsr_head *llsh;
list uplist;
slab *upslab;
- int length, i, lsano;
+ unsigned int size = ntohs(ps->ospf_packet.length);
+ int i, lsano;
struct proto *p = (struct proto *) ifa->proto;
- nrid = ntohl(ps->ospf_packet.routerid);
-
- 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)) /
+ lsano = (size - sizeof(struct ospf_lsreq_packet)) /
sizeof(struct ospf_lsreq_header);
for (i = 0; i < lsano; lsh++, i++)
{
diff --git a/proto/ospf/lsreq.h b/proto/ospf/lsreq.h
index 90a4e82..f917f05 100644
--- a/proto/ospf/lsreq.h
+++ b/proto/ospf/lsreq.h
@@ -12,6 +12,6 @@
void ospf_lsreq_send(struct ospf_neighbor *n);
void ospf_lsreq_receive(struct ospf_lsreq_packet *ps,
- struct ospf_iface *ifa, u16 size);
+ struct ospf_iface *ifa, struct ospf_neighbor *n);
#endif /* _BIRD_OSPF_LSREQ_H_ */
diff --git a/proto/ospf/lsupd.c b/proto/ospf/lsupd.c
index 52531bf..2211891 100644
--- a/proto/ospf/lsupd.c
+++ b/proto/ospf/lsupd.c
@@ -283,24 +283,15 @@ ospf_lsupd_send_list(struct ospf_neighbor *n, list * l)
void
ospf_lsupd_receive(struct ospf_lsupd_packet *ps,
- struct ospf_iface *ifa, u16 size)
+ struct ospf_iface *ifa, struct ospf_neighbor *n)
{
- u32 area, nrid;
- struct ospf_neighbor *n, *ntmp;
+ u32 area;
+ struct ospf_neighbor *ntmp;
struct ospf_lsa_header *lsa;
struct ospf_area *oa;
struct proto_ospf *po = ifa->proto;
struct proto *p = (struct proto *) po;
- u8 i;
- int sendreq = 1;
-
- nrid = ntohl(ps->ospf_packet.routerid);
-
- if ((n = find_neigh(ifa, nrid)) == NULL)
- {
- OSPF_TRACE(D_PACKETS, "Received lsupd from unknown neighbor! (%I)", nrid);
- return;
- }
+ unsigned int i, sendreq = 1, size = ntohs(ps->ospf_packet.length);
if (n->state < NEIGHBOR_EXCHANGE)
{
@@ -329,8 +320,8 @@ ospf_lsupd_receive(struct ospf_lsupd_packet *ps,
{
struct ospf_lsa_header lsatmp;
struct top_hash_entry *lsadb;
- int diff = ((u8 *) lsa) - ((u8 *) ps);
- u16 chsum, lenn = ntohs(lsa->length);
+ unsigned diff = ((u8 *) lsa) - ((u8 *) ps), lenn = ntohs(lsa->length);
+ u16 chsum;
if (((diff + sizeof(struct ospf_lsa_header)) >= size)
|| ((lenn + diff) > size))
diff --git a/proto/ospf/lsupd.h b/proto/ospf/lsupd.h
index 8c04675..64d9aef 100644
--- a/proto/ospf/lsupd.h
+++ b/proto/ospf/lsupd.h
@@ -12,7 +12,7 @@
void ospf_lsupd_send_list(struct ospf_neighbor *n, list * l);
void ospf_lsupd_receive(struct ospf_lsupd_packet *ps,
- struct ospf_iface *ifa, u16 size);
+ struct ospf_iface *ifa, struct ospf_neighbor *n);
int ospf_lsupd_flood(struct ospf_neighbor *n, struct ospf_lsa_header *hn,
struct ospf_lsa_header *hh, struct ospf_iface *iff,
struct ospf_area *oa, int rtl);
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index 714ca80..ef3066e 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -84,6 +84,8 @@ ospf_rx_hook(sock * sk, int size)
struct ospf_packet *ps;
struct ospf_iface *ifa = (struct ospf_iface *) (sk->data);
struct proto *p = (struct proto *) (ifa->proto);
+ struct ospf_neighbor *n;
+ char *mesg = "Bad OSPF packet from ";
if (ifa->stub)
return (1);
@@ -93,65 +95,71 @@ ospf_rx_hook(sock * sk, int size)
ps = (struct ospf_packet *) ipv4_skip_header(sk->rbuf, &size);
if (ps == NULL)
{
- log("%s: Bad OSPF packet received: bad IP header", p->name);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - bad IP header", mesg, sk->faddr);
+ return 1;
}
if ((unsigned) size < sizeof(struct ospf_packet))
{
- log("%s: Bad OSPF packet received: too short (%u bytes)", p->name, size);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - too short (%u bytes)", mesg, sk->faddr, size);
+ return 1;
}
if ((ntohs(ps->length) != size) || (size != (4 * (size / 4))))
{
- log("%s: Bad OSPF packet received: size field does not match", p->name);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - size field does not match", mesg, sk->faddr);
+ return 1;
}
if (ps->version != OSPF_VERSION)
{
- log("%s: Bad OSPF packet received: version %u", p->name, ps->version);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - version %u", mesg, sk->faddr, ps->version);
+ return 1;
}
if (!ipsum_verify(ps, 16, (void *) ps + sizeof(struct ospf_packet),
ntohs(ps->length) - sizeof(struct ospf_packet), NULL))
{
- log("%s: Bad OSPF packet received: bad checksum", p->name);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - bad checksum", mesg, sk->faddr);
+ return 1;
}
if (!ospf_rx_authenticate(ifa, ps))
{
- log("%s: Bad OSPF packet received: bad password", p->name);
- return (1);
+ log(L_ERR "%s%I - bad password", mesg, sk->faddr);
+ return 1;
}
if (ntohl(ps->areaid) != ifa->an)
{
- log("%s: Bad OSPF packet received: other area %ld", p->name, ps->areaid);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - other area %ld", mesg, sk->faddr, ps->areaid);
+ return 1;
}
if (ntohl(ps->routerid) == p->cf->global->router_id)
{
- log("%s: Bad OSPF packet received: received my own router ID!", p->name);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - received my own router ID!", mesg, sk->faddr);
+ return 1;
}
if (ntohl(ps->routerid) == 0)
{
- log("%s: Bad OSPF packet received: Id 0.0.0.0 is not allowed.", p->name);
- log("%s: Discarding", p->name);
- return (1);
+ log(L_ERR "%s%I - router id = 0.0.0.0", mesg, sk->faddr);
+ return 1;
+ }
+
+ if ((unsigned) size > ifa->iface->mtu)
+ {
+ log(L_ERR "%s%I - received larger packet than MTU", mesg, sk->faddr);
+ return 1;
+ }
+
+ n = find_neigh(ifa, ntohl(((struct ospf_packet *) ps)->routerid));
+
+ if(!n && (ps->type != HELLO_P))
+ {
+ OSPF_TRACE(D_PACKETS, "Received non-hello packet from uknown neighbor (%I)", sk->faddr);
+ return 1;
}
/* Dump packet
@@ -166,30 +174,29 @@ ospf_rx_hook(sock * sk, int size)
{
case HELLO_P:
DBG("%s: Hello received.\n", p->name);
- ospf_hello_receive((struct ospf_hello_packet *) ps, ifa, size, sk->faddr);
+ ospf_hello_receive((struct ospf_hello_packet *) ps, ifa, n, sk->faddr);
break;
case DBDES_P:
DBG("%s: Database description received.\n", p->name);
- ospf_dbdes_receive((struct ospf_dbdes_packet *) ps, ifa, size);
+ ospf_dbdes_receive((struct ospf_dbdes_packet *) ps, ifa, n);
break;
case LSREQ_P:
DBG("%s: Link state request received.\n", p->name);
- ospf_lsreq_receive((struct ospf_lsreq_packet *) ps, ifa, size);
+ ospf_lsreq_receive((struct ospf_lsreq_packet *) ps, ifa, n);
break;
case LSUPD_P:
DBG("%s: Link state update received.\n", p->name);
- ospf_lsupd_receive((struct ospf_lsupd_packet *) ps, ifa, size);
+ ospf_lsupd_receive((struct ospf_lsupd_packet *) ps, ifa, n);
break;
case LSACK_P:
DBG("%s: Link state ack received.\n", p->name);
- ospf_lsack_receive((struct ospf_lsack_packet *) ps, ifa, size);
+ ospf_lsack_receive((struct ospf_lsack_packet *) ps, ifa, n);
break;
default:
- log("%s: Bad packet received: wrong type %u", p->name, ps->type);
- log("%s: Discarding\n", p->name);
- return (1);
+ log(L_ERR "%s%I - wrong type %u", mesg, sk->faddr, ps->type);
+ return 1;
};
- return (1);
+ return 1;
}
void
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 06:46:16 +0100