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-rw-r--r--proto/ospf/packet.c292
1 files changed, 151 insertions, 141 deletions
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index 5f2d6282..750f3a3e 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -1,7 +1,7 @@
/*
* BIRD -- OSPF
*
- * (c) 1999 - 2000 Ondrej Filip <feela@network.cz>
+ * (c) 1999 - 2003 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@@ -9,60 +9,65 @@
#include "ospf.h"
void
-fill_ospf_pkt_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
+fill_ospf_pkt_hdr (struct ospf_iface *ifa, void *buf, u8 h_type)
{
struct ospf_packet *pkt;
struct proto *p;
-
- p=(struct proto *)(ifa->proto);
- pkt=(struct ospf_packet *)buf;
+ p = (struct proto *) (ifa->proto);
- pkt->version=OSPF_VERSION;
+ pkt = (struct ospf_packet *) buf;
- pkt->type=h_type;
+ pkt->version = OSPF_VERSION;
- pkt->routerid=htonl(p->cf->global->router_id);
- pkt->areaid=htonl(ifa->an);
- pkt->autype=htons(ifa->autype);
- pkt->checksum=0;
+ pkt->type = h_type;
+
+ pkt->routerid = htonl (p->cf->global->router_id);
+ pkt->areaid = htonl (ifa->an);
+ pkt->autype = htons (ifa->autype);
+ pkt->checksum = 0;
}
void
-ospf_tx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt)
+ospf_tx_authenticate (struct ospf_iface *ifa, struct ospf_packet *pkt)
{
int i;
- pkt->autype=ifa->autype;
- memcpy(pkt->authetication, ifa->aukey, 8);
+ pkt->autype = htons (ifa->autype);
+ memcpy (pkt->authetication, ifa->aukey, 8);
return;
}
int
-ospf_rx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt)
+ospf_rx_authenticate (struct ospf_iface *ifa, struct ospf_packet *pkt)
{
int i;
- if(pkt->autype!=ifa->autype) return 0;
- if(ifa->autype==AU_NONE) return 1;
- if(ifa->autype==AU_SIMPLE)
- {
- for(i=0;i<8;i++)
+ if (pkt->autype != htons (ifa->autype))
+ return 0;
+ if (ifa->autype == AU_NONE)
+ return 1;
+ if (ifa->autype == AU_SIMPLE)
{
- if(pkt->authetication[i]!=ifa->aukey[i]) return 0;
+ for (i = 0; i < 8; i++)
+ {
+ if (pkt->authetication[i] != ifa->aukey[i])
+ return 0;
+ }
+ return 1;
}
- return 1;
- }
return 0;
}
void
-ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
+ospf_pkt_finalize (struct ospf_iface *ifa, struct ospf_packet *pkt)
{
- ospf_tx_authenticate(ifa, pkt);
+ ospf_tx_authenticate (ifa, pkt);
/* Count checksum */
- pkt->checksum=ipsum_calculate(pkt,sizeof(struct ospf_packet)-8,
- (pkt+1),ntohs(pkt->length)-sizeof(struct ospf_packet),NULL);
+ pkt->checksum = ipsum_calculate (pkt, sizeof (struct ospf_packet) - 8,
+ (pkt + 1),
+ ntohs (pkt->length) -
+ sizeof (struct ospf_packet), NULL);
}
/**
@@ -75,166 +80,171 @@ ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
* non generic functions.
*/
int
-ospf_rx_hook(sock *sk, int size)
+ospf_rx_hook (sock * sk, int size)
{
#ifndef IPV6
struct ospf_packet *ps;
- struct ospf_iface *ifa=(struct ospf_iface *)(sk->data);
- struct proto *p=(struct proto *)(ifa->proto);
+ struct ospf_iface *ifa = (struct ospf_iface *) (sk->data);
+ struct proto *p = (struct proto *) (ifa->proto);
int i;
u8 *pu8;
- if(ifa->stub) return(1);
-
- DBG("%s: RX_Hook called on interface %s.\n",p->name, sk->iface->name);
-
- 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);
- }
-
- 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);
- }
-
- 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);
- }
-
- if(ps->version!=OSPF_VERSION)
- {
- log("%s: Bad OSPF packet received: version %u", p->name, ps->version);
- log("%s: Discarding",p->name);
- 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);
- }
-
- if(!ospf_rx_authenticate(ifa,ps))
- {
- log("%s: Bad OSPF packet received: bad password", p->name);
- 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);
- }
-
- 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);
- }
-
- 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);
- }
-
+ if (ifa->stub)
+ return (1);
+
+ DBG ("%s: RX_Hook called on interface %s.\n", p->name, sk->iface->name);
+
+ 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);
+ }
+
+ 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);
+ }
+
+ 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);
+ }
+
+ if (ps->version != OSPF_VERSION)
+ {
+ log ("%s: Bad OSPF packet received: version %u", p->name, ps->version);
+ log ("%s: Discarding", p->name);
+ 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);
+ }
+
+ if (!ospf_rx_authenticate (ifa, ps))
+ {
+ log ("%s: Bad OSPF packet received: bad password", p->name);
+ 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);
+ }
+
+ 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);
+ }
+
+ 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);
+ }
+
/* Dump packet
- pu8=(u8 *)(sk->rbuf+5*4);
- for(i=0;i<ntohs(ps->length);i+=4)
- DBG("%s: received %u,%u,%u,%u\n",p->name, pu8[i+0], pu8[i+1], pu8[i+2],
- pu8[i+3]);
- DBG("%s: received size: %u\n",p->name,size);
- */
-
- switch(ps->type)
- {
+ pu8=(u8 *)(sk->rbuf+5*4);
+ for(i=0;i<ntohs(ps->length);i+=4)
+ DBG("%s: received %u,%u,%u,%u\n",p->name, pu8[i+0], pu8[i+1], pu8[i+2],
+ pu8[i+3]);
+ DBG("%s: received size: %u\n",p->name,size);
+ */
+
+ switch (ps->type)
+ {
case HELLO_P:
- DBG("%s: Hello received.\n", p->name);
- ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa, size, sk->faddr);
+ DBG ("%s: Hello received.\n", p->name);
+ ospf_hello_rx ((struct ospf_hello_packet *) ps, p, ifa, size,
+ sk->faddr);
break;
case DBDES_P:
- DBG("%s: Database description received.\n", p->name);
- ospf_dbdes_rx((struct ospf_dbdes_packet *)ps, p, ifa, size);
+ DBG ("%s: Database description received.\n", p->name);
+ ospf_dbdes_rx ((struct ospf_dbdes_packet *) ps, p, ifa, size);
break;
case LSREQ_P:
- DBG("%s: Link state request received.\n", p->name);
- ospf_lsreq_rx((struct ospf_lsreq_packet *)ps, p, ifa, size);
+ DBG ("%s: Link state request received.\n", p->name);
+ ospf_lsreq_rx ((struct ospf_lsreq_packet *) ps, p, ifa, size);
break;
case LSUPD_P:
- DBG("%s: Link state update received.\n", p->name);
- ospf_lsupd_rx((struct ospf_lsupd_packet *)ps, p, ifa, size);
+ DBG ("%s: Link state update received.\n", p->name);
+ ospf_lsupd_rx ((struct ospf_lsupd_packet *) ps, p, ifa, size);
break;
case LSACK_P:
- DBG("%s: Link state ack received.\n", p->name);
- ospf_lsack_rx((struct ospf_lsack_packet *)ps, p, ifa, size);
+ DBG ("%s: Link state ack received.\n", p->name);
+ ospf_lsack_rx ((struct ospf_lsack_packet *) ps, p, ifa, size);
break;
default:
- log("%s: Bad packet received: wrong type %u", p->name, ps->type);
- log("%s: Discarding\n",p->name);
- return(1);
- };
+ log ("%s: Bad packet received: wrong type %u", p->name, ps->type);
+ log ("%s: Discarding\n", p->name);
+ return (1);
+ };
#else
#error RX_Hook does not work for IPv6 now.
#endif
- return(1);
+ return (1);
}
void
-ospf_tx_hook(sock *sk)
+ospf_tx_hook (sock * sk)
{
struct ospf_iface *ifa;
struct proto *p;
- ifa=(struct ospf_iface *)(sk->data);
+ ifa = (struct ospf_iface *) (sk->data);
- p=(struct proto *)(ifa->proto);
- DBG("%s: TX_Hook called on interface %s\n", p->name,sk->iface->name);
+ p = (struct proto *) (ifa->proto);
+ DBG ("%s: TX_Hook called on interface %s\n", p->name, sk->iface->name);
}
void
-ospf_err_hook(sock *sk, int err)
+ospf_err_hook (sock * sk, int err)
{
struct ospf_iface *ifa;
struct proto *p;
- ifa=(struct ospf_iface *)(sk->data);
+ ifa = (struct ospf_iface *) (sk->data);
- p=(struct proto *)(ifa->proto);
- DBG("%s: Err_Hook called on interface %s\n", p->name,sk->iface->name);
+ p = (struct proto *) (ifa->proto);
+ DBG ("%s: Err_Hook called on interface %s\n", p->name, sk->iface->name);
}
void
-sk_send_to_agt(sock *sk, u16 len, struct ospf_iface *ifa, u8 state)
+sk_send_to_agt (sock * sk, u16 len, struct ospf_iface *ifa, u8 state)
{
struct ospf_neighbor *n;
- WALK_LIST(NODE n,ifa->neigh_list)
- if(n->state>=state)
- sk_send_to(sk, len, n->ip, OSPF_PROTO);
-}
+ WALK_LIST (NODE n, ifa->neigh_list) if (n->state >= state)
+ sk_send_to (sk, len, n->ip, OSPF_PROTO);
+}
void
-sk_send_to_bdr(sock *sk, u16 len, struct ospf_iface *ifa)
+sk_send_to_bdr (sock * sk, u16 len, struct ospf_iface *ifa)
{
struct ospf_neighbor *n;
- if(ipa_compare(ifa->drip,ipa_from_u32(0))!=0)
- sk_send_to(sk, len, ifa->drip, OSPF_PROTO);
- if(ipa_compare(ifa->bdrip,ipa_from_u32(0))!=0)
- sk_send_to(sk, len, ifa->bdrip, OSPF_PROTO);
+ if (ipa_compare (ifa->drip, ipa_from_u32 (0)) != 0)
+ sk_send_to (sk, len, ifa->drip, OSPF_PROTO);
+ if (ipa_compare (ifa->bdrip, ipa_from_u32 (0)) != 0)
+ sk_send_to (sk, len, ifa->bdrip, OSPF_PROTO);
}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 17:43:46 +0000