#include "ospf.h"
/**
- * ospf_dbdes_tx - transmit database description packet
+ * ospf_dbdes_send - transmit database description packet
* @n: neighbor
*
* Sending of a database description packet is described in 10.6 of RFC 2328.
* of the buffer.
*/
void
-ospf_dbdes_tx(struct ospf_neighbor *n)
+ospf_dbdes_send(struct ospf_neighbor *n)
{
struct ospf_dbdes_packet *pkt;
struct ospf_packet *op;
- struct ospf_iface *ifa=n->ifa;
- struct ospf_area *oa=ifa->oa;
+ struct ospf_iface *ifa = n->ifa;
+ struct ospf_area *oa = ifa->oa;
u16 length;
- struct proto *p;
- u16 i,j;
- u8 *aa,*bb;
+ struct proto *p = (struct proto *) (ifa->proto);
+ u16 i, j;
+ u8 *aa, *bb;
- if((oa->rt==NULL)||(EMPTY_LIST(oa->lsal))) originate_rt_lsa(oa);
+ if ((oa->rt == NULL) || (EMPTY_LIST(oa->lsal)))
+ originate_rt_lsa(oa);
- p=(struct proto *)(ifa->proto);
-
- switch(n->state)
+ switch (n->state)
{
- case NEIGHBOR_EXSTART: /* Send empty packets */
- n->myimms.bit.i=1;
- pkt=(struct ospf_dbdes_packet *)(ifa->ip_sk->tbuf);
- op=(struct ospf_packet *)pkt;
+ case NEIGHBOR_EXSTART: /* Send empty packets */
+ n->myimms.bit.i = 1;
+ pkt = (struct ospf_dbdes_packet *) (ifa->ip_sk->tbuf);
+ op = (struct ospf_packet *) pkt;
+ fill_ospf_pkt_hdr(ifa, pkt, DBDES_P);
+ pkt->iface_mtu = htons(ifa->iface->mtu); /* FIXME NOT for VLINK! */
+ pkt->options = ifa->options;
+ pkt->imms = n->myimms;
+ pkt->ddseq = htonl(n->dds);
+ length = sizeof(struct ospf_dbdes_packet);
+ op->length = htons(length);
+ ospf_pkt_finalize(ifa, op);
+ sk_send_to(ifa->ip_sk, length, n->ip, OSPF_PROTO);
+ OSPF_TRACE(D_PACKETS, "DB_DES (I) sent to %I via %s.", n->ip,
+ ifa->iface->name);
+ break;
+
+ case NEIGHBOR_EXCHANGE:
+ n->myimms.bit.i = 0;
+
+ if (((n->myimms.bit.ms) && (n->dds == n->ddr + 1)) ||
+ ((!(n->myimms.bit.ms)) && (n->dds == n->ddr)))
+ {
+ snode *sn; /* Send next */
+ struct ospf_lsa_header *lsa;
+
+ pkt = n->ldbdes;
+ op = (struct ospf_packet *) pkt;
+
fill_ospf_pkt_hdr(ifa, pkt, DBDES_P);
- pkt->iface_mtu=htons(ifa->iface->mtu); /* FIXME NOT for VLINK! */
- pkt->options= ifa->options;
- pkt->imms=n->myimms;
- pkt->ddseq=htonl(n->dds);
- length=sizeof(struct ospf_dbdes_packet);
- op->length=htons(length);
- ospf_pkt_finalize(ifa, op);
- sk_send_to(ifa->ip_sk,length, n->ip, OSPF_PROTO);
- OSPF_TRACE(D_PACKETS, "DB_DES (I) sent to %I via %s.", n->ip,
- ifa->iface->name);
- break;
+ pkt->iface_mtu = htons(ifa->iface->mtu);
+ pkt->options = ifa->options;
+ pkt->ddseq = htonl(n->dds);
- case NEIGHBOR_EXCHANGE:
- n->myimms.bit.i=0;
+ j = i = (ifa->iface->mtu - sizeof(struct ospf_dbdes_packet) - SIPH) / sizeof(struct ospf_lsa_header); /* Number of possible lsaheaders to send */
+ lsa = (n->ldbdes + sizeof(struct ospf_dbdes_packet));
- if(((n->myimms.bit.ms) && (n->dds==n->ddr+1)) ||
- ((!(n->myimms.bit.ms)) && (n->dds==n->ddr)))
+ if (n->myimms.bit.m)
{
- snode *sn; /* Send next */
- struct ospf_lsa_header *lsa;
-
- pkt=n->ldbdes;
- op=(struct ospf_packet *)pkt;
-
- fill_ospf_pkt_hdr(ifa, pkt, DBDES_P);
- pkt->iface_mtu=htons(ifa->iface->mtu);
- pkt->options= ifa->options;
- pkt->ddseq=htonl(n->dds);
-
- j=i=(ifa->iface->mtu-sizeof(struct ospf_dbdes_packet)-SIPH)/
- sizeof(struct ospf_lsa_header); /* Number of possible lsaheaders to send */
- lsa=(n->ldbdes+sizeof(struct ospf_dbdes_packet));
-
- if(n->myimms.bit.m)
+ sn = s_get(&(n->dbsi));
+
+ DBG("Number of LSA: %d\n", j);
+ for (; i > 0; i--)
{
- sn=s_get(&(n->dbsi));
+ struct top_hash_entry *en;
- DBG("Number of LSA: %d\n", j);
- for(;i>0;i--)
- {
- struct top_hash_entry *en;
-
- en=(struct top_hash_entry *)sn;
- htonlsah(&(en->lsa), lsa);
- DBG("Working on: %d\n", i);
- DBG("\tX%01x %-1I %-1I %p\n", en->lsa.type, en->lsa.id,
- en->lsa.rt, en->lsa_body);
-
- if(sn==STAIL(n->ifa->oa->lsal))
- {
- i--;
- break; /* Should set some flag? */
- }
- sn=sn->next;
- lsa++;
- }
+ en = (struct top_hash_entry *) sn;
+ htonlsah(&(en->lsa), lsa);
+ DBG("Working on: %d\n", i);
+ DBG("\tX%01x %-1I %-1I %p\n", en->lsa.type, en->lsa.id,
+ en->lsa.rt, en->lsa_body);
- if(sn==STAIL(n->ifa->oa->lsal))
+ if (sn == STAIL(n->ifa->oa->lsal))
{
- DBG("Number of LSA NOT sent: %d\n", i);
- DBG("M bit unset.\n");
- n->myimms.bit.m=0; /* Unset more bit */
+ i--;
+ break; /* Should set some flag? */
}
- else s_put(&(n->dbsi),sn);
+ sn = sn->next;
+ lsa++;
}
- pkt->imms.byte=n->myimms.byte;
-
- length=(j-i)*sizeof(struct ospf_lsa_header)+
- sizeof(struct ospf_dbdes_packet);
- op->length=htons(length);
-
- ospf_pkt_finalize(ifa, op);
- DBG("%s: DB_DES (M) prepared for %I.\n", p->name, n->ip);
+ if (sn == STAIL(n->ifa->oa->lsal))
+ {
+ DBG("Number of LSA NOT sent: %d\n", i);
+ DBG("M bit unset.\n");
+ n->myimms.bit.m = 0; /* Unset more bit */
+ }
+ else
+ s_put(&(n->dbsi), sn);
}
- case NEIGHBOR_LOADING:
- case NEIGHBOR_FULL:
- aa=ifa->ip_sk->tbuf;
- bb=n->ldbdes;
- op=n->ldbdes;
- length=ntohs(op->length);
+ pkt->imms.byte = n->myimms.byte;
- for(i=0; i<length; i++)
- {
- *(aa+i)=*(bb+i); /* Copy last sent packet again */
- }
+ length = (j - i) * sizeof(struct ospf_lsa_header) +
+ sizeof(struct ospf_dbdes_packet);
+ op->length = htons(length);
+
+ ospf_pkt_finalize(ifa, op);
+ DBG("%s: DB_DES (M) prepared for %I.\n", p->name, n->ip);
+ }
+
+ case NEIGHBOR_LOADING:
+ case NEIGHBOR_FULL:
+ aa = ifa->ip_sk->tbuf;
+ bb = n->ldbdes;
+ op = n->ldbdes;
+ length = ntohs(op->length);
+
+ for (i = 0; i < length; i++)
+ {
+ *(aa + i) = *(bb + i); /* Copy last sent packet again */
+ }
- sk_send_to(ifa->ip_sk,length, n->ip, OSPF_PROTO);
- OSPF_TRACE(D_PACKETS, "DB_DES (M) sent to %I via %s.", n->ip,
- ifa->iface->name);
- if(! n->myimms.bit.ms)
+ sk_send_to(ifa->ip_sk, length, n->ip, OSPF_PROTO);
+ OSPF_TRACE(D_PACKETS, "DB_DES (M) sent to %I via %s.", n->ip,
+ ifa->iface->name);
+ if (!n->myimms.bit.ms)
+ {
+ if ((n->myimms.bit.m == 0) && (n->imms.bit.m == 0) &&
+ (n->state == NEIGHBOR_EXCHANGE))
{
- if((n->myimms.bit.m==0) && (n->imms.bit.m==0) &&
- (n->state==NEIGHBOR_EXCHANGE))
- {
- ospf_neigh_sm(n, INM_EXDONE);
- }
+ ospf_neigh_sm(n, INM_EXDONE);
}
- break;
+ }
+ break;
- default: /* Ignore it */
- break;
+ default: /* Ignore it */
+ break;
}
}
void
-ospf_dbdes_reqladd(struct ospf_dbdes_packet *ps, struct proto *p,
- struct ospf_neighbor *n)
+ospf_dbdes_reqladd(struct ospf_dbdes_packet *ps, struct ospf_neighbor *n)
{
- struct ospf_lsa_header *plsa,lsa;
- struct top_hash_entry *he,*sn;
- struct top_graph *gr;
+ struct ospf_lsa_header *plsa, lsa;
+ struct top_hash_entry *he, *sn;
+ struct top_graph *gr = n->ifa->oa->gr;
struct ospf_packet *op;
- int i,j;
+ struct proto *p = (struct proto *) n->ifa->proto;
+ int i, j;
- gr=n->ifa->oa->gr;
- op=(struct ospf_packet *)ps;
+ op = (struct ospf_packet *) ps;
- plsa=(void *)(ps+1);
+ plsa = (void *) (ps + 1);
- j=(ntohs(op->length)-sizeof(struct ospf_dbdes_packet))/
- sizeof( struct ospf_lsa_header);
+ j = (ntohs(op->length) - sizeof(struct ospf_dbdes_packet)) /
+ sizeof(struct ospf_lsa_header);
- for(i=0;i<j;i++)
+ for (i = 0; i < j; i++)
{
- ntohlsah(plsa+i, &lsa);
- if(((he=ospf_hash_find(gr,lsa.id,lsa.rt,lsa.type))==NULL)||
- (lsa_comp(&lsa, &(he->lsa))==1))
+ ntohlsah(plsa + i, &lsa);
+ if (((he = ospf_hash_find(gr, lsa.id, lsa.rt, lsa.type)) == NULL) ||
+ (lsa_comp(&lsa, &(he->lsa)) == 1))
{
/* Is this condition necessary? */
- if(ospf_hash_find(n->lsrqh,lsa.id,lsa.rt,lsa.type)==NULL)
+ if (ospf_hash_find(n->lsrqh, lsa.id, lsa.rt, lsa.type) == NULL)
{
- sn=ospf_hash_get(n->lsrqh,lsa.id,lsa.rt,lsa.type);
- ntohlsah(plsa+i, &(sn->lsa));
- s_add_tail(&(n->lsrql), SNODE sn);
+ sn = ospf_hash_get(n->lsrqh, lsa.id, lsa.rt, lsa.type);
+ ntohlsah(plsa + i, &(sn->lsa));
+ s_add_tail(&(n->lsrql), SNODE sn);
}
}
}
}
void
-ospf_dbdes_rx(struct ospf_dbdes_packet *ps, struct proto *p,
- struct ospf_iface *ifa, u16 size)
+ospf_dbdes_receive(struct ospf_dbdes_packet *ps,
+ struct ospf_iface *ifa, u16 size)
{
- u32 nrid, myrid;
+ struct proto *p = (struct proto *) ifa->proto;
+ u32 nrid, myrid = p->cf->global->router_id;
struct ospf_neighbor *n;
- nrid=ntohl(((struct ospf_packet *)ps)->routerid);
+ nrid = ntohl(((struct ospf_packet *) ps)->routerid);
- myrid=p->cf->global->router_id;
- if((n=find_neigh(ifa, nrid))==NULL)
+ if ((n = find_neigh(ifa, nrid)) == NULL)
{
- OSPF_TRACE(D_PACKETS, "Received dbdes from unknown neigbor! %I.",
- nrid);
- return ;
+ OSPF_TRACE(D_PACKETS, "Received dbdes from unknown neigbor! %I.", nrid);
+ return;
}
- if(ifa->iface->mtu<size)
+ if (ifa->iface->mtu < size)
{
OSPF_TRACE(D_PACKETS, "Received dbdes larger than MTU from %I!", n->ip);
- return ;
+ return;
}
OSPF_TRACE(D_PACKETS, "Received dbdes from %I via %s.", n->ip,
- ifa->iface->name);
+ ifa->iface->name);
ospf_neigh_sm(n, INM_HELLOREC);
- switch(n->state)
+ switch (n->state)
{
- case NEIGHBOR_DOWN:
- case NEIGHBOR_ATTEMPT:
- case NEIGHBOR_2WAY:
- return;
+ case NEIGHBOR_DOWN:
+ case NEIGHBOR_ATTEMPT:
+ case NEIGHBOR_2WAY:
+ return;
+ break;
+ case NEIGHBOR_INIT:
+ ospf_neigh_sm(n, INM_2WAYREC);
+ if (n->state != NEIGHBOR_EXSTART)
+ return;
+ case NEIGHBOR_EXSTART:
+ if ((ps->imms.bit.m && ps->imms.bit.ms && ps->imms.bit.i)
+ && (n->rid > myrid) && (size == sizeof(struct ospf_dbdes_packet)))
+ {
+ /* I'm slave! */
+ n->dds = ntohl(ps->ddseq);
+ n->ddr = ntohl(ps->ddseq);
+ n->options = ps->options;
+ n->myimms.bit.ms = 0;
+ n->imms.byte = ps->imms.byte;
+ OSPF_TRACE(D_PACKETS, "I'm slave to %I.", n->ip);
+ ospf_neigh_sm(n, INM_NEGDONE);
+ ospf_dbdes_send(n);
break;
- case NEIGHBOR_INIT:
- ospf_neigh_sm(n, INM_2WAYREC);
- if(n->state!=NEIGHBOR_EXSTART) return;
- case NEIGHBOR_EXSTART:
- if((ps->imms.bit.m && ps->imms.bit.ms && ps->imms.bit.i)
- && (n->rid > myrid) &&
- (size == sizeof(struct ospf_dbdes_packet)))
- {
- /* I'm slave! */
- n->dds=ntohl(ps->ddseq);
- n->ddr=ntohl(ps->ddseq);
- n->options=ps->options;
- n->myimms.bit.ms=0;
- n->imms.byte=ps->imms.byte;
- OSPF_TRACE(D_PACKETS, "I'm slave to %I.", n->ip);
- ospf_neigh_sm(n, INM_NEGDONE);
- ospf_dbdes_tx(n);
- break;
- }
- else
- {
- if(((ps->imms.bit.i==0) && (ps->imms.bit.ms==0)) &&
- (n->rid < myrid) && (n->dds == ntohl(ps->ddseq)))
- {
- /* I'm master! */
- n->options=ps->options;
- n->ddr=ntohl(ps->ddseq)-1;
- n->imms.byte=ps->imms.byte;
- OSPF_TRACE(D_PACKETS, "I'm master to %I.", n->ip);
- ospf_neigh_sm(n, INM_NEGDONE);
- }
- else
- {
- DBG("%s: Nothing happend to %I (imms=%u)\n", p->name, n->ip,
- ps->imms.byte);
- break;
- }
- }
- if(ps->imms.bit.i) break;
- case NEIGHBOR_EXCHANGE:
- if((ps->imms.byte==n->imms.byte) && (ps->options==n->options) &&
- (ntohl(ps->ddseq)==n->ddr))
- {
- /* Duplicate packet */
- OSPF_TRACE(D_PACKETS, "Received duplicate dbdes from %I.", n->ip);
- if(n->imms.bit.ms==0)
- {
- ospf_dbdes_tx(n);
- }
- return;
- }
-
- n->ddr=ntohl(ps->ddseq);
-
- if(ps->imms.bit.ms!=n->imms.bit.ms) /* M/S bit differs */
- {
- log("SEQMIS-BIT-MS\n");
- ospf_neigh_sm(n, INM_SEQMIS);
- break;
- }
-
- if(ps->imms.bit.i) /* I bit is set */
- {
- log("SEQMIS-BIT-I\n");
- ospf_neigh_sm(n, INM_SEQMIS);
- break;
- }
-
- n->imms.byte=ps->imms.byte;
-
- if(ps->options!=n->options) /* Options differs */
- {
- log("SEQMIS-OPT\n");
- ospf_neigh_sm(n, INM_SEQMIS);
- break;
- }
-
- if(n->myimms.bit.ms)
- {
- if(ntohl(ps->ddseq)!=n->dds) /* MASTER */
- {
- log("SEQMIS-MASTER\n");
- ospf_neigh_sm(n, INM_SEQMIS);
- break;
- }
- n->dds++;
- DBG("Incrementing dds\n");
- ospf_dbdes_reqladd(ps,p,n);
- if((n->myimms.bit.m==0) && (ps->imms.bit.m==0))
- {
- ospf_neigh_sm(n, INM_EXDONE);
- }
- else
- {
- ospf_dbdes_tx(n);
- }
+ }
+ else
+ {
+ if (((ps->imms.bit.i == 0) && (ps->imms.bit.ms == 0)) &&
+ (n->rid < myrid) && (n->dds == ntohl(ps->ddseq)))
+ {
+ /* I'm master! */
+ n->options = ps->options;
+ n->ddr = ntohl(ps->ddseq) - 1;
+ n->imms.byte = ps->imms.byte;
+ OSPF_TRACE(D_PACKETS, "I'm master to %I.", n->ip);
+ ospf_neigh_sm(n, INM_NEGDONE);
+ }
+ else
+ {
+ DBG("%s: Nothing happend to %I (imms=%u)\n", p->name, n->ip,
+ ps->imms.byte);
+ break;
+ }
+ }
+ if (ps->imms.bit.i)
+ break;
+ case NEIGHBOR_EXCHANGE:
+ if ((ps->imms.byte == n->imms.byte) && (ps->options == n->options) &&
+ (ntohl(ps->ddseq) == n->ddr))
+ {
+ /* Duplicate packet */
+ OSPF_TRACE(D_PACKETS, "Received duplicate dbdes from %I.", n->ip);
+ if (n->imms.bit.ms == 0)
+ {
+ ospf_dbdes_send(n);
+ }
+ return;
+ }
- }
- else
- {
- if(ntohl(ps->ddseq)!=(n->dds+1)) /* SLAVE */
- {
- log("SEQMIS-SLAVE\n");
- ospf_neigh_sm(n, INM_SEQMIS);
- break;
- }
- n->ddr=ntohl(ps->ddseq);
- n->dds=ntohl(ps->ddseq);
- ospf_dbdes_reqladd(ps,p,n);
- ospf_dbdes_tx(n);
- }
+ n->ddr = ntohl(ps->ddseq);
+ if (ps->imms.bit.ms != n->imms.bit.ms) /* M/S bit differs */
+ {
+ OSPF_TRACE(D_PACKETS, "dbdes - sequence mismatch neighbor %I (bit MS)",
+ n->ip);
+ ospf_neigh_sm(n, INM_SEQMIS);
break;
- case NEIGHBOR_LOADING:
- case NEIGHBOR_FULL:
- if((ps->imms.byte==n->imms.byte) && (ps->options==n->options) &&
- (ntohl(ps->ddseq)==n->ddr)) /* Only duplicate are accepted */
- {
- OSPF_TRACE(D_PACKETS, "Received duplicate dbdes from %I.",n->ip);
- return;
- }
- else
- {
- log("SEQMIS-FULL\n");
- ospf_neigh_sm(n, INM_SEQMIS);
- }
+ }
+
+ if (ps->imms.bit.i) /* I bit is set */
+ {
+ OSPF_TRACE(D_PACKETS, "dbdes - sequence mismatch neighbor %I (bit I)",
+ n->ip);
+ ospf_neigh_sm(n, INM_SEQMIS);
break;
- defaut:
- bug("%s: Received dbdes from %I in undefined state.", p->name, n->ip);
+ }
+
+ n->imms.byte = ps->imms.byte;
+
+ if (ps->options != n->options) /* Options differs */
+ {
+ OSPF_TRACE(D_PACKETS, "dbdes - sequence mismatch neighbor %I (options)",
+ n->ip);
+ ospf_neigh_sm(n, INM_SEQMIS);
break;
- }
-}
+ }
+ if (n->myimms.bit.ms)
+ {
+ if (ntohl(ps->ddseq) != n->dds) /* MASTER */
+ {
+ OSPF_TRACE(D_PACKETS,
+ "dbdes - sequence mismatch neighbor %I (master)", n->ip);
+ ospf_neigh_sm(n, INM_SEQMIS);
+ break;
+ }
+ n->dds++;
+ DBG("Incrementing dds\n");
+ ospf_dbdes_reqladd(ps, n);
+ if ((n->myimms.bit.m == 0) && (ps->imms.bit.m == 0))
+ {
+ ospf_neigh_sm(n, INM_EXDONE);
+ }
+ else
+ {
+ ospf_dbdes_send(n);
+ }
+
+ }
+ else
+ {
+ if (ntohl(ps->ddseq) != (n->dds + 1)) /* SLAVE */
+ {
+ OSPF_TRACE(D_PACKETS, "dbdes - sequence mismatch neighbor %I (slave)",
+ n->ip);
+ ospf_neigh_sm(n, INM_SEQMIS);
+ break;
+ }
+ n->ddr = ntohl(ps->ddseq);
+ n->dds = ntohl(ps->ddseq);
+ ospf_dbdes_reqladd(ps, n);
+ ospf_dbdes_send(n);
+ }
+
+ break;
+ case NEIGHBOR_LOADING:
+ case NEIGHBOR_FULL:
+ if ((ps->imms.byte == n->imms.byte) && (ps->options == n->options)
+ && (ntohl(ps->ddseq) == n->ddr))
+ /* Only duplicate are accepted */
+ {
+ OSPF_TRACE(D_PACKETS, "Received duplicate dbdes from %I.", n->ip);
+ return;
+ }
+ else
+ {
+ OSPF_TRACE(D_PACKETS, "dbdes - sequence mismatch neighbor %I (full)",
+ n->ip);
+ ospf_neigh_sm(n, INM_SEQMIS);
+ }
+ break;
+ defaut:
+ bug("Received dbdes from %I in undefined state.", n->ip);
+ break;
+ }
+}
projects / thirdparty / bird.git / commitdiff
