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Temporary OSPF commit - socket changes.

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This commit is contained in:
Ondrej Zajicek
2010-02-11 10:23:35 +01:00
parent 75f8861898
commit 353729f513
18 changed files with 615 additions and 295 deletions
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162
proto/ospf/packet.c
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@@ -252,12 +252,62 @@ ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
static int
ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_packet *pkt, int size)
{ return 1; }
#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
* @sk: socket we received the packet. Its ignored.
* @sk: socket we received the packet.
* @size: size of the packet
*
* This is the entry point for messages from neighbors. Many checks (like
@@ -265,21 +315,14 @@ ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_
* non generic functions.
*/
int
ospf_rx_hook(sock * sk, int size)
ospf_rx_hook(sock *sk, int size)
{
struct ospf_packet *ps;
struct ospf_iface *ifa = (struct ospf_iface *) (sk->data);
struct proto_ospf *po = ifa->oa->po;
struct proto *p = &po->proto;
struct ospf_neighbor *n;
int osize;
char *mesg = "Bad OSPF packet from ";
struct ospf_iface *iff;
char *mesg = "OSPF: Bad packet from ";
if (ifa->stub)
return (1);
DBG("OSPF: RX_Hook called (from %I)\n", sk->faddr);
ps = (struct ospf_packet *) ip_skip_header(sk->rbuf, &size);
/* First, 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)
{
@@ -287,34 +330,25 @@ ospf_rx_hook(sock * sk, int size)
return 1;
}
/* We receive packets related to vlinks even on non-vlink sockets */
if ((ifa->oa->areaid != 0) && (ntohl(ps->areaid) == 0))
{
WALK_LIST(iff, po->iface_list)
{
if ((iff->type == OSPF_IT_VLINK) && (iff->iface == ifa->iface) &&
(iff->voa = ifa->oa) && ipa_equal(sk->faddr, iff->vip))
{
return 1; /* Packet is for VLINK */
}
}
}
DBG("%s: RX_Hook called on interface %s.\n", p->name, sk->iface->name);
if ((unsigned) size < sizeof(struct ospf_packet))
{
log(L_ERR "%s%I - too short (%u bytes)", mesg, sk->faddr, size);
return 1;
}
osize = ntohs(ps->length);
int osize = ntohs(ps->length);
if ((osize > size) || ((osize % 4) != 0))
{
log(L_ERR "%s%I - size field does not match (%d/%d)", mesg, sk->faddr, osize, size);
return 1;
}
if ((unsigned) size > sk->rbsize)
{
log(L_ERR "%s%I - too large (%d vs %d)", mesg, sk->faddr, size, sk->rbsize);
return 1;
}
if (ps->version != OSPF_VERSION)
{
log(L_ERR "%s%I - version %u", mesg, sk->faddr, ps->version);
@@ -331,20 +365,31 @@ ospf_rx_hook(sock * sk, int size)
}
#endif
if (ntohl(ps->areaid) != ifa->oa->areaid)
/* 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)
{
log(L_ERR "%s%I - different area (%u)", mesg, sk->faddr, ntohl(ps->areaid));
/* We limit logging of unmatched packets as it may be perfectly OK */
if (unmatched_count < 8)
{
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++;
}
return 1;
}
/* FIXME - handling of instance id should be better */
#ifdef OSPFv3
if (ps->instance_id != ifa->instance_id)
{
log(L_ERR "%s%I - different instance (%u)", mesg, sk->faddr, ps->instance_id);
struct proto_ospf *po = ifa->oa->po;
struct proto *p = &po->proto;
if (ifa->stub) /* This shouldn't happen */
return 1;
if (ipa_equal(sk->laddr, AllDRouters) && (ifa->sk_dr == 0))
return 1;
}
#endif
if (ntohl(ps->routerid) == po->router_id)
{
@@ -358,21 +403,15 @@ ospf_rx_hook(sock * sk, int size)
return 1;
}
if ((unsigned) size > sk->rbsize)
{
log(L_ERR "%s%I - packet is too large (%d vs %d)",
mesg, sk->faddr, size, sk->rbsize);
return 1;
}
/* This is deviation from RFC 2328 - neighbours should be identified by
* IP address on broadcast and NBMA networks.
*/
n = find_neigh(ifa, ntohl(ps->routerid));
struct ospf_neighbor *n = find_neigh(ifa, ntohl(ps->routerid));
if(!n && (ps->type != HELLO_P))
{
OSPF_TRACE(D_PACKETS, "Received non-hello packet from uknown neighbor (%I)", sk->faddr);
log(L_WARN "OSPF: Received non-hello packet from uknown neighbor (src %I, iface %s)",
sk->faddr, ifa->iface->name);
return 1;
}
@@ -422,18 +461,17 @@ ospf_rx_hook(sock * sk, int size)
void
ospf_tx_hook(sock * sk)
{
struct ospf_iface *ifa= (struct ospf_iface *) (sk->data);
struct proto *p = (struct proto *) (ifa->oa->po);
log(L_ERR "%s: TX_Hook called on interface %s\n", p->name, sk->iface->name);
// struct ospf_iface *ifa= (struct ospf_iface *) (sk->data);
// struct proto *p = (struct proto *) (ifa->oa->po);
log(L_ERR "OSPF: TX_Hook called");
}
void
ospf_err_hook(sock * sk, int err)
{
struct ospf_iface *ifa= (struct ospf_iface *) (sk->data);
struct proto *p = (struct proto *) (ifa->oa->po);
log(L_ERR "%s: Err_Hook called on interface %s with err=%d\n",
p->name, sk->iface->name, err);
// struct ospf_iface *ifa= (struct ospf_iface *) (sk->data);
// struct proto *p = (struct proto *) (ifa->oa->po);
log(L_ERR "OSPF: Socket error: %m", err);
}
void
@@ -441,8 +479,9 @@ ospf_send_to_agt(struct ospf_iface *ifa, u8 state)
{
struct ospf_neighbor *n;
WALK_LIST(n, ifa->neigh_list) if (n->state >= state)
ospf_send_to(ifa, n->ip);
WALK_LIST(n, ifa->neigh_list)
if (n->state >= state)
ospf_send_to(ifa, n->ip);
}
void
@@ -455,7 +494,7 @@ ospf_send_to_bdr(struct ospf_iface *ifa)
}
void
ospf_send_to(struct ospf_iface *ifa, ip_addr ip)
ospf_send_to(struct ospf_iface *ifa, ip_addr dst)
{
sock *sk = ifa->sk;
struct ospf_packet *pkt = (struct ospf_packet *) sk->tbuf;
@@ -468,11 +507,8 @@ ospf_send_to(struct ospf_iface *ifa, ip_addr ip)
ospf_pkt_finalize(ifa, pkt);
if (sk->tbuf != sk->tpos)
log(L_ERR "Aiee, old packet was overwritted in TX buffer");
log(L_ERR "Aiee, old packet was overwritten in TX buffer");
if (ipa_equal(ip, IPA_NONE))
sk_send(sk, len);
else
sk_send_to(sk, len, ip, OSPF_PROTO);
sk_send_to(sk, len, dst, 0);
}