OSPF RX implementation starts....
This commit is contained in:
Ondrej Filip
parent
1b16029c12
commit
296ecb56eb
2 changed files with 128 additions and 1 deletions
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@ -22,11 +22,37 @@
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#include "ospf.h"
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void
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ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
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struct ospf_iface *ifa)
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{
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switch(ifa->state)
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{
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case OSPF_IS_DOWN:
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die("%s: Iface %s in down state?",p->name, ifa->iface->name);
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break;
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case OSPF_IS_WAITING:
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DBG(p->name);
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DBG(": Neighbour? on iface ");
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DBG(ifa->iface->name);
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DBG("\n");
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break;
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default:
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die("%s: Iface %s in unknown state?",p->name, ifa->iface->name);
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break;
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}
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}
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int
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ospf_rx_hook(sock *sk, int size)
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{
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#ifndef IPV6
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struct ospf_packet *ps;
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struct ospf_iface *ifa;
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struct proto *p;
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int i;
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u8 *pu8;
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ifa=(struct ospf_iface *)(sk->data);
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@ -35,6 +61,71 @@ ospf_rx_hook(sock *sk, int size)
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DBG(": RX_Hook called on interface ");
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DBG(sk->iface->name);
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DBG(".\n");
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ps=(struct ospf_packet *)(sk->rbuf+5*4);
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if(size<=(20+sizeof(struct ospf_packet)))
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{
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log("%s: Bad packet received: too short", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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if((ntohs(ps->length))!=(size-20))
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{
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log("%s: Bad packet received: size fields does not match", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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if(ps->version!=OSPF_VERSION)
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{
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log("%s: Bad packet received: version %d", p->name, ps->version);
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log("%s: Discarding",p->name);
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return(1);
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}
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/* FIXME: Count checksum */
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/* FIXME: Do authetification */
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if(ps->areaid!=ifa->area)
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{
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log("%s: Bad packet received: other area %ld", p->name, ps->areaid);
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log("%s: Discarding",p->name);
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return(1);
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}
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/* Dump packet */
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pu8=(u8 *)(sk->rbuf+5*4);
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for(i=0;i<ntohs(ps->length);i+=4)
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debug("%s: received %d,%d,%d,%d\n",p->name, pu8[i+0], pu8[i+1], pu8[i+2],
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pu8[i+3]);
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debug("%s: received size: %d\n",p->name,size);
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switch(ps->type)
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{
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case HELLO:
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DBG(p->name);
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DBG(": Hello received.\n");
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ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa);
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break;
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case DBDES:
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break;
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case LSREQ:
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break;
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case LSUPD:
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break;
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case LSACK:
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break;
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default:
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log("%s: Bad packet received: wrong type %d", p->name, ps->type);
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log("%s: Discarding",p->name);
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return(1);
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};
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DBG("\n");
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#else
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#error RX_Hook does not work for IPv6 now.
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#endif
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return(1);
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}
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@ -164,6 +255,7 @@ add_hello_timer(struct ospf_iface *ifa)
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ifa->timer->expires=0;
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tm_start(ifa->timer,0);
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DBG("%s: Installing hello timer.\n", p->name);
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if(ifa->type=OSPF_IT_PTP) ifa->state=OSPF_IS_PTP;
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}
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void
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@ -197,6 +289,10 @@ wait_timer_hook(timer *timer)
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}
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add_hello_timer(ifa);
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}
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else
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{
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die("%s: Wait timer fired I'm not in WAITING state?", p->name);
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}
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}
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void
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@ -213,6 +309,7 @@ add_wait_timer(struct ospf_iface *ifa, pool *pool, int wait)
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ifa->timer->hook=wait_timer_hook;
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ifa->timer->recurrent=0;
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ifa->timer->expires=0;
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ifa->state=OSPF_IS_WAITING;
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tm_start(ifa->timer,(wait!=0 ? wait : WAIT_D));
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DBG(p->name);
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DBG(": Installing wait timer.\n");
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@ -228,7 +325,7 @@ ospf_iface_default(struct ospf_iface *ifa)
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{
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int i;
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ifa->area=0;
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ifa->area=0; /* FIXME: Read from config */
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ifa->cost=COST_D;
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ifa->rxmtint=RXMTINT_D;
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ifa->iftransdelay=IFTRANSDELAY_D;
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@ -295,6 +392,7 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
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if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
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{
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debug(" OSPF: killing interface %s.\n", iface->name);
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/* FIXME: This should delete ifaces */
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}
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}
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@ -303,6 +401,7 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
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if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
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{
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debug(" OSPF: changing MTU on interface %s.\n", iface->name);
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/* FIXME: change MTU */
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}
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}
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}
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@ -11,6 +11,7 @@
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#define OSPF_PROTO 89
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#ifndef IPV6
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#define OSPF_VERSION 2
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#define AllSPFRouters ipa_from_u32(0xe0000005) /* 224.0.0.5 */
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#define AllDRouters ipa_from_u32(0xe0000006) /* 224.0.0.6 */
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#else
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@ -84,4 +85,31 @@ struct ospf_patt {
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byte mode;
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};
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struct ospf_packet {
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u8 version;
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u8 type;
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#define HELLO 1 /* Hello */
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#define DBDES 2 /* Database description */
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#define LSREQ 3 /* Link state request */
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#define LSUPD 4 /* Link state update */
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#define LSACK 5 /* Link state acknowledgement */
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u16 length;
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u32 routerid;
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u32 areaid;
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u16 checksum;
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u16 autype;
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u8 authetication[8];
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};
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struct ospf_hello_packet {
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struct ospf_packet;
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u32 netmask;
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u16 hello_int;
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u8 options;
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u8 priority;
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u32 deadint;
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u32 dr;
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u32 bdr;
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};
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#endif /* _BIRD_OSPF_H_ */
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