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

1 files changed, 253 insertions, 0 deletions

diff --git a/proto/ospf/hello.c b/proto/ospf/hello.c
new file mode 100644
index 0000000..6186807
--- /dev/null
+++ b/proto/ospf/hello.c
@@ -0,0 +1,253 @@
+/*
+ *	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
+install_inactim(struct ospf_neighbor *n)
+{
+  struct proto *p;
+  struct ospf_iface *ifa;
+
+  ifa=n->ifa;
+  p=(struct proto *)(ifa->proto);
+
+  if(n->inactim==NULL)
+  {
+    n->inactim=tm_new(p->pool);
+    n->inactim->data=n;
+    n->inactim->randomize=0;
+    n->inactim->hook=neighbor_timer_hook;
+    n->inactim->recurrent=0;
+    DBG("%s: Installing inactivity timer.\n", p->name);
+  }
+}
+
+void
+restart_inactim(struct ospf_neighbor *n)
+{
+  tm_start(n->inactim,n->ifa->deadc*n->ifa->helloint);
+}
+
+void
+restart_hellotim(struct ospf_iface *ifa)
+{
+  tm_start(ifa->hello_timer,ifa->helloint);
+}
+
+void
+restart_waittim(struct ospf_iface *ifa)
+{
+  tm_start(ifa->wait_timer,ifa->waitint);
+}
+
+void
+ospf_hello_rx(struct ospf_hello_packet *ps, struct proto *p,
+  struct ospf_iface *ifa, int size, ip_addr faddr)
+{
+  char sip[100]; /* FIXME: Should be smaller */
+  u32 nrid, *pnrid;
+  struct ospf_neighbor *neigh,*n;
+  u8 i,twoway;
+
+  nrid=ntohl(((struct ospf_packet *)ps)->routerid);
+
+  if((unsigned)ipa_mklen(ipa_ntoh(ps->netmask))!=ifa->iface->addr->pxlen)
+  {
+    ip_ntop(ps->netmask,sip);
+    log("%s: Bad OSPF packet from %u received: bad netmask %s.",
+      p->name, nrid, sip);
+    log("%s: Discarding",p->name);
+    return;
+  }
+  
+  if(ntohs(ps->helloint)!=ifa->helloint)
+  {
+    log("%s: Bad OSPF packet from %u received: hello interval mismatch.",
+      p->name, nrid);
+    log("%s: Discarding",p->name);
+    return;
+  }
+
+  if(ntohl(ps->deadint)!=ifa->helloint*ifa->deadc)
+  {
+    log("%s: Bad OSPF packet from %u received: dead interval mismatch.",
+      p->name, nrid);
+    log("%s: Discarding",p->name);
+    return;
+  }
+
+  if(ps->options!=ifa->options)
+  {
+    log("%s: Bad OSPF packet from %u received: options mismatch.",
+      p->name, nrid);	/* FIXME: This not good */
+    log("%s: Discarding",p->name);
+    return;
+  }
+
+  if((n=find_neigh(ifa, nrid))==NULL)
+  {
+    log("%s: New neighbor found: %u.", p->name,nrid);
+    n=mb_alloc(p->pool, sizeof(struct ospf_neighbor));
+    add_tail(&ifa->neigh_list, NODE n);
+    n->rid=nrid;
+    n->ip=faddr;
+    n->dr=ntohl(ps->dr);
+    n->bdr=ntohl(ps->bdr);
+    n->priority=ps->priority;
+    n->options=ps->options;
+    n->ifa=ifa;
+    n->adj=0;
+    neigh_chstate(n,NEIGHBOR_DOWN);
+    install_inactim(n);
+  }
+  ospf_neigh_sm(n, INM_HELLOREC);
+
+  pnrid=(u32 *)((struct ospf_hello_packet *)(ps+1));
+
+  twoway=0;
+  for(i=0;i<size-(sizeof(struct ospf_hello_packet));i++)
+  {
+    if(ntohl(*(pnrid+i))==p->cf->global->router_id)
+    {
+      DBG("%s: Twoway received. %u\n", p->name, nrid);
+      ospf_neigh_sm(n, INM_2WAYREC);
+      twoway=1;
+      break;
+    }
+  }
+
+  if(!twoway) ospf_neigh_sm(n, INM_1WAYREC);
+
+  /* Check priority change */
+  if(n->priority!=(n->priority=ps->priority))
+  {
+    ospf_int_sm(ifa, ISM_NEICH);
+  }
+
+  /* Check neighbor's designed router idea */
+  if((n->rid!=ntohl(ps->dr)) && (ntohl(ps->bdr)==0) &&
+    (n->state>=NEIGHBOR_2WAY))
+  {
+    ospf_int_sm(ifa, ISM_BACKS);
+  }
+  if((n->rid==ntohl(ps->dr)) && (n->dr!=ntohl(ps->dr)))
+  {
+    ospf_int_sm(ifa, ISM_NEICH);
+  }
+  if((n->rid==n->dr) && (n->dr!=ntohl(ps->dr)))
+  {
+    ospf_int_sm(ifa, ISM_NEICH);
+  }
+  n->dr=ntohl(ps->dr);	/* And update it */
+
+  /* Check neighbor's backup designed router idea */
+  if((n->rid==ntohl(ps->bdr)) && (n->state>=NEIGHBOR_2WAY))
+  {
+    ospf_int_sm(ifa, ISM_BACKS);
+  }
+  if((n->rid==ntohl(ps->bdr)) && (n->bdr!=ntohl(ps->bdr)))
+  {
+    ospf_int_sm(ifa, ISM_NEICH);
+  }
+  if((n->rid==n->bdr) && (n->bdr!=ntohl(ps->bdr)))
+  {
+    ospf_int_sm(ifa, ISM_NEICH);
+  }
+  n->bdr=ntohl(ps->bdr);	/* And update it */
+
+  ospf_neigh_sm(n, INM_HELLOREC);
+}
+
+void
+hello_timer_hook(timer *timer)
+{
+  struct ospf_iface *ifa;
+  struct ospf_hello_packet *pkt;
+  struct ospf_packet *op;
+  struct proto *p;
+  struct ospf_neighbor *neigh;
+  u16 length;
+  u32 *pp;
+  u8 i;
+
+  ifa=(struct ospf_iface *)timer->data;
+  p=(struct proto *)(ifa->proto);
+  debug("%s: Hello timer fired on interface %s.\n",
+    p->name, ifa->iface->name);
+  /* Now we should send a hello packet */
+  /* First a common packet header */
+  if(ifa->type!=OSPF_IT_NBMA)
+  {
+    /* Now fill ospf_hello header */
+    pkt=(struct ospf_hello_packet *)(ifa->hello_sk->tbuf);
+    op=(struct ospf_packet *)pkt;
+
+    fill_ospf_pkt_hdr(ifa, pkt, HELLO);
+
+    pkt->netmask=ipa_mkmask(ifa->iface->addr->pxlen);
+    ipa_hton(pkt->netmask);
+    pkt->helloint=ntohs(ifa->helloint);
+    pkt->options=ifa->options;
+    pkt->priority=ifa->priority;
+    pkt->deadint=htonl(ifa->deadc*ifa->helloint);
+    pkt->dr=htonl(ifa->drid);
+    pkt->bdr=htonl(ifa->bdrid);
+
+    /* Fill all neighbors */
+    i=0;
+    pp=(u32 *)(((u8 *)pkt)+sizeof(struct ospf_hello_packet));
+    WALK_LIST (neigh, ifa->neigh_list)
+    {
+      *(pp+i)=htonl(neigh->rid);
+      i++;
+    }
+
+    length=sizeof(struct ospf_hello_packet)+i*sizeof(u32);
+    op->length=htons(length);
+
+    ospf_pkt_finalize(ifa, op);
+
+    /* And finally send it :-) */
+    sk_send(ifa->hello_sk,length);
+  }
+}
+
+void
+wait_timer_hook(timer *timer)
+{
+  struct ospf_iface *ifa;
+  struct proto *p;
+
+  ifa=(struct ospf_iface *)timer->data;
+  p=(struct proto *)(ifa->proto);
+  debug("%s: Wait timer fired on interface %s.\n",
+    p->name, ifa->iface->name);
+  ospf_int_sm(ifa, ISM_WAITF);
+}
+
+/* Neighbor is inactive for a long time. Remove it. */
+void
+neighbor_timer_hook(timer *timer)
+{
+  struct ospf_neighbor *n;
+  struct ospf_iface *ifa;
+  struct proto *p;
+
+  n=(struct ospf_neighbor *)timer->data;
+  ifa=n->ifa;
+  p=(struct proto *)(ifa->proto);
+  debug("%s: Inactivity timer fired on interface %s for neighbor %u.\n",
+    p->name, ifa->iface->name, n->rid);
+  tm_stop(n->inactim);
+  rfree(n->inactim);
+  rem_node(NODE n);
+  mb_free(n);
+  debug("%s: Deleting neigbor.\n", p->name);
+  /* FIXME: Go on */
+}