Commit e7b76b97 authored by Ondřej Zajíček's avatar Ondřej Zajíček

Temoporary OSPF commit - socket changes.

parent 353729f5
......@@ -82,6 +82,15 @@ struct iface *if_find_by_index(unsigned);
struct iface *if_find_by_name(char *);
void ifa_recalc_all_primary_addresses(void);
static inline int
ifa_match_addr(struct ifa *ifa, ip_addr addr)
{
if (ifa->flags & IA_UNNUMBERED)
return ipa_equal(addr, ifa->opposite);
else
return ipa_in_net(addr, ifa->prefix, ifa->pxlen);
}
/* The Neighbor Cache */
typedef struct neighbor {
......
......@@ -93,7 +93,7 @@ ospf_dbdes_send(struct ospf_neighbor *n, int next)
{
case NEIGHBOR_EXSTART: /* Send empty packets */
n->myimms.bit.i = 1;
pkt = ospf_tx_buffer();
pkt = ospf_tx_buffer(ifa);
op = &pkt->ospf_packet;
ospf_pkt_fill_hdr(ifa, pkt, DBDES_P);
pkt->iface_mtu = htons(ifa->iface->mtu);
......@@ -185,7 +185,7 @@ ospf_dbdes_send(struct ospf_neighbor *n, int next)
}
/* Copy last sent packet again */
pkt = ospf_tx_buffer();
pkt = ospf_tx_buffer(ifa);
memcpy(pkt, n->ldbdes, length);
OSPF_PACKET(ospf_dump_dbdes, pkt, "DBDES packet sent to %I via %s", n->ip, ifa->iface->name);
......
......@@ -258,7 +258,7 @@ ospf_hello_send(timer *timer, int poll, struct ospf_neighbor *dirn)
p->name, ifa->iface->name);
/* Now we should send a hello packet */
pkt = ospf_tx_buffer();
pkt = ospf_tx_buffer(ifa);
op = &pkt->ospf_packet;
/* Now fill ospf_hello header */
......
......@@ -82,9 +82,6 @@ ospf_sk_open(struct ospf_iface *ifa, int mc)
#endif
sk->tos = IP_PREC_INTERNET_CONTROL;
sk->ttl = 1;
if (ifa->type == OSPF_IT_VLINK)
sk->ttl = 255;
sk->rx_hook = ospf_rx_hook;
sk->tx_hook = ospf_tx_hook;
sk->err_hook = ospf_err_hook;
......@@ -191,10 +188,12 @@ ospf_iface_chstate(struct ospf_iface *ifa, u8 state)
OSPF_TRACE(D_EVENTS,
"Changing state of virtual link %R from \"%s\" into \"%s\".",
ifa->vid, ospf_is[oldstate], ospf_is[state]);
/*
if (state == OSPF_IS_PTP)
ospf_sk_open(ifa, 0);
if (state == OSPF_IS_DOWN)
ospf_sk_close(ifa);
*/
}
else
{
......
......@@ -66,7 +66,7 @@ ospf_lsack_send(struct ospf_neighbor *n, int queue)
if (EMPTY_LIST(n->ackl[queue]))
return;
pk = ospf_tx_buffer();
pk = ospf_tx_buffer(ifa);
op = &pk->ospf_packet;
ospf_pkt_fill_hdr(n->ifa, pk, LSACK_P);
......
......@@ -44,7 +44,7 @@ ospf_lsreq_send(struct ospf_neighbor *n)
int i, j;
struct proto *p = &n->ifa->oa->po->proto;
pk = ospf_tx_buffer();
pk = ospf_tx_buffer(n->ifa);
op = &pk->ospf_packet;
ospf_pkt_fill_hdr(n->ifa, pk, LSREQ_P);
......
......@@ -269,7 +269,7 @@ ospf_lsupd_flood(struct proto_ospf *po,
struct ospf_packet *op;
struct ospf_lsa_header *lh;
pk = ospf_tx_buffer();
pk = ospf_tx_buffer(ifa);
op = &pk->ospf_packet;
ospf_pkt_fill_hdr(ifa, pk, LSUPD_P);
......@@ -350,7 +350,7 @@ ospf_lsupd_send_list(struct ospf_neighbor *n, list * l)
DBG("LSupd: 1st packet\n");
pk= ospf_tx_buffer();
pk= ospf_tx_buffer(n->ifa);
op = &pk->ospf_packet;
ospf_pkt_fill_hdr(n->ifa, pk, LSUPD_P);
......
......@@ -255,55 +255,6 @@ ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_
#endif
static struct ospf_iface *
find_matching_iface(struct ospf_packet *ps, unsigned ifindex, ip_addr faddr)
{
u32 areaid = ntohl(ps->areaid);
u32 rid = ntohl(ps->routerid);
node *nd;
/* First, we will try to match real ifaces */
WALK_LIST(nd, ospf_ifaces)
{
struct ospf_iface *ifa = SKIP_BACK(struct ospf_iface, sk_node, nd);
struct ifa *addr = ifa->addr;
if ((ifa->iface->index == ifindex) &&
(ifa->oa->areaid == areaid) &&
#ifdef OSPFv2
((addr->flags & IA_UNNUMBERED) ?
ipa_equal(faddr, addr->opposite) :
ipa_in_net(faddr, addr->prefix, addr->pxlen))
#else /* OSPFv3 */
(ifa->instance_id == ps->instance_id)
#endif
)
return ifa;
}
/* Second, we will try to match vlinks */
if (areaid != 0)
return NULL;
/* FIXME: There should be some more checks to distinquish parallel
vlinks to the same ABR. */
WALK_LIST(nd, ospf_vlinks)
{
struct ospf_iface *ifa = SKIP_BACK(struct ospf_iface, sk_node, nd);
if ((ifa->vid == rid)
#ifdef OSPFv3
&& (ifa->instance_id == ps->instance_id)
#endif
)
return ifa;
}
return NULL;
}
/**
* ospf_rx_hook
......@@ -319,9 +270,47 @@ ospf_rx_hook(sock *sk, int size)
{
char *mesg = "OSPF: Bad packet from ";
DBG("OSPF: RX_Hook called (from %I)\n", sk->faddr);
/* We want just packets from sk->iface. Unfortunately, on BSD we
cannot filter out other packets at kernel level and we receive
all packets on all sockets */
if (sk->lifindex != sk->iface->index)
return 1;
DBG("OSPF: RX hook called (iface %s, src %I, dst %I)\n",
sk->iface->name, sk->faddr, sk->laddr);
/* Initially, the packet is associated with the 'master' iface */
struct ospf_iface *ifa = sk->data;
struct proto_ospf *po = ifa->oa->po;
struct proto *p = &po->proto;
int src_local = ifa_match_addr(ifa->addr, sk->faddr);
int dst_local = ipa_equal(sk->laddr, ifa->addr->ip);
int dst_mcast = ipa_equal(sk->laddr, AllSPFRouters) || ipa_equal(sk->laddr, AllDRouters);
#ifdef OSPFv2
/* First, we eliminate packets with strange address combinations.
* In OSPFv2, they might be for other ospf_ifaces (with different IP
* prefix) on the same real iface, so we don't log it. We enforce
* that (src_local || dst_local), therefore we are eliminating all
* such cases.
*/
if (dst_mcast && !src_local)
return 1;
if (!dst_mcast && !dst_local)
return 1;
/* First, we check packet size, checksum, and the protocol version */
#else /* OSPFv3 */
/* In OSPFv3, src_local and dst_local mean link-local.
* RFC 5340 says that local (non-vlink) packets use
* link-local src address, but does not enforce it. Strange.
*/
if (dst_mcast && !src_local)
log(L_WARN "OSPF: Received multicast packet from %I (not link-local)", sk->faddr);
#endif
/* Second, we check packet size, checksum, and the protocol version */
struct ospf_packet *ps = (struct ospf_packet *) ip_skip_header(sk->rbuf, &size);
if (ps == NULL)
......@@ -366,38 +355,78 @@ ospf_rx_hook(sock *sk, int size)
#endif
/* Now, we would like to associate the packet with an OSPF iface */
struct ospf_iface *ifa = find_matching_iface(ps, sk->lifindex, sk->faddr);
if (ifa == NULL)
/* Third, we resolve associated iface and handle vlinks. */
u32 areaid = ntohl(ps->areaid);
u32 rid = ntohl(ps->routerid);
if ((areaid == ifa->oa->areaid)
#ifdef OSPFv3
&& (ps->instance_id != ifa->instance_id)
#endif
)
{
/* It is real iface, source should be local (in OSPFv2) */
#ifdef OSPFv2
if (!src_local)
return 1;
#endif
}
else if (dst_mcast || (areaid != 0))
{
/* Obvious mismatch */
#ifdef OSPFv2
/* We ignore mismatch in OSPFv3, because there might be
other instance with different instance ID */
log(L_ERR "%s%I - area does not match (%R vs %R)",
mesg, sk->faddr, areaid, ifa->oa->areaid);
#endif
return 1;
}
else
{
/* We limit logging of unmatched packets as it may be perfectly OK */
if (unmatched_count < 8)
/* Some vlink? */
struct ospf_iface *iff = NULL;
WALK_LIST(iff, po->iface_list)
{
struct iface *ifc = if_find_by_index(sk->lifindex);
log(L_WARN "OSPF: Received unmatched packet (src %I, iface %s, rtid %R, area %R)",
sk->faddr, ifc ? ifc->name : "?", ntohl(ps->routerid), ntohl(ps->areaid));
unmatched_count++;
if ((iff->type == OSPF_IT_VLINK) &&
(iff->voa == ifa->oa) &&
#ifdef OSPFv3
(iff->instance_id == ps->instance_id) &&
#endif
(iff->vid == rid))
{
/* Vlink should be UP */
if (iff->state != OSPF_IS_PTP)
return 1;
ifa = iff;
goto found;
}
}
#ifdef OSPFv2
log(L_WARN "OSPF: Received packet for uknown vlink (ID %R, IP %I)", rid, sk->faddr);
#endif
return 1;
}
struct proto_ospf *po = ifa->oa->po;
struct proto *p = &po->proto;
found:
if (ifa->stub) /* This shouldn't happen */
return 1;
if (ipa_equal(sk->laddr, AllDRouters) && (ifa->sk_dr == 0))
return 1;
if (ntohl(ps->routerid) == po->router_id)
if (rid == po->router_id)
{
log(L_ERR "%s%I - received my own router ID!", mesg, sk->faddr);
return 1;
}
if (ntohl(ps->routerid) == 0)
if (rid == 0)
{
log(L_ERR "%s%I - router id = 0.0.0.0", mesg, sk->faddr);
return 1;
......@@ -406,7 +435,7 @@ ospf_rx_hook(sock *sk, int size)
/* This is deviation from RFC 2328 - neighbours should be identified by
* IP address on broadcast and NBMA networks.
*/
struct ospf_neighbor *n = find_neigh(ifa, ntohl(ps->routerid));
struct ospf_neighbor *n = find_neigh(ifa, rid);
if(!n && (ps->type != HELLO_P))
{
......
......@@ -19,6 +19,6 @@ void ospf_send_to_agt(struct ospf_iface *ifa, u8 state);
void ospf_send_to_bdr(struct ospf_iface *ifa);
void ospf_send_to(struct ospf_iface *ifa, ip_addr ip);
static inline void * ospf_tx_buffer() { return ospf_socket->tbuf; }
static inline void * ospf_tx_buffer(struct ospf_iface *ifa) { return ifa->sk->tbuf; }
#endif /* _BIRD_OSPF_PACKET_H_ */
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