ospf.c and ospc.h splitted into various files.

1 files changed, 186 insertions, 0 deletions

diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
new file mode 100644
index 0000000..1e9706a
--- /dev/null
+++ b/proto/ospf/packet.c
@@ -0,0 +1,186 @@
+/*
+ *	BIRD -- OSPF
+ *
+ *	(c) 1999 Ondrej Filip <feela@network.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include "ospf.h"
+
+void
+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;
+
+  pkt->version=OSPF_VERSION;
+
+  pkt->type=h_type;
+
+  pkt->routerid=htonl(p->cf->global->router_id);
+  pkt->areaid=htonl(ifa->area);
+  pkt->autype=htons(ifa->autype);
+  pkt->checksum=0;
+}
+
+void
+ospf_tx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt)
+{
+  /* FIXME */
+  return;
+}
+
+void
+ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *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);
+}
+
+int
+ospf_rx_hook(sock *sk, int size)
+{
+#ifndef IPV6
+  struct ospf_packet *ps;
+  struct ospf_iface *ifa;
+  struct proto *p;
+  int i;
+  u8 *pu8;
+
+
+  ifa=(struct ospf_iface *)(sk->data);
+
+  p=(struct proto *)(ifa->proto);
+  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)
+  {
+    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);
+  }
+
+  /* FIXME: Do authetification */
+
+  if(ps->areaid!=ifa->area)
+  {
+    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 IP!.", 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]);
+  debug("%s: received size: %u\n",p->name,size);
+
+  switch(ps->type)
+  {
+    case HELLO:
+      DBG("%s: Hello received.\n", p->name);
+      ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa, size, sk->faddr);
+      break;
+    case DBDES:
+      DBG("%s: Database description received.\n", p->name);
+      ospf_dbdes_rx((struct ospf_dbdes_packet *)ps, p, ifa, size);
+      break;
+    case LSREQ:
+      DBG("%s: Link state request received.\n", p->name);
+      break;
+    case LSUPD:
+      DBG("%s: Link state update received.\n", p->name);
+      break;
+    case LSACK:
+      DBG("%s: Link state ack received.\n", p->name);
+      break;
+    default:
+      log("%s: Bad packet received: wrong type %u", p->name, ps->type);
+      log("%s: Discarding",p->name);
+      return(1);
+  };
+  DBG("\n");
+#else
+#error RX_Hook does not work for IPv6 now.
+#endif
+  return(1);
+}
+
+void
+ospf_tx_hook(sock *sk)
+{
+  struct ospf_iface *ifa;
+  struct proto *p;
+
+  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);
+}
+
+void
+ospf_err_hook(sock *sk, int err)
+{
+  struct ospf_iface *ifa;
+  struct proto *p;
+
+  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);
+}
+