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hello.* reindented, code cleanup.

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This commit is contained in:
Ondrej Filip
2004-06-04 17:12:27 +00:00
parent 8e15e048f2
commit 77539c4471
3 changed files with 133 additions and 121 deletions
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246
proto/ospf/hello.c
View File

@@ -9,112 +9,115 @@
#include "ospf.h"
void
ospf_hello_receive(struct ospf_hello_packet *ps, struct proto *p,
struct ospf_iface *ifa, int size, ip_addr faddr)
ospf_hello_receive(struct ospf_hello_packet *ps,
struct ospf_iface *ifa, int size, ip_addr faddr)
{
u32 nrid, *pnrid;
struct ospf_neighbor *neigh,*n;
u8 i,twoway,oldpriority;
ip_addr olddr,oldbdr;
struct ospf_neighbor *neigh, *n;
u8 i, twoway, oldpriority;
ip_addr olddr, oldbdr;
ip_addr mask;
char *beg=": Bad OSPF hello packet from ", *rec=" received: ";
int eligible=0;
char *beg = "Bad OSPF hello packet from ", *rec = " received: ";
int eligible = 0;
pool *pool;
struct proto *p = (struct proto *) ifa->proto;
nrid=ntohl(((struct ospf_packet *)ps)->routerid);
nrid = ntohl(((struct ospf_packet *) ps)->routerid);
OSPF_TRACE(D_PACKETS, "Received hello from %I via %s",faddr,ifa->iface->name);
mask=ps->netmask;
OSPF_TRACE(D_PACKETS, "Received hello from %I via %s", faddr,
ifa->iface->name);
mask = ps->netmask;
ipa_ntoh(mask);
if((unsigned)ipa_mklen(mask)!=ifa->iface->addr->pxlen)
if ((unsigned) ipa_mklen(mask) != ifa->iface->addr->pxlen)
{
log("%s%s%I%sbad netmask %I.", p->name, beg, nrid, rec,
mask);
return;
}
if(ntohs(ps->helloint)!=ifa->helloint)
{
log("%s%s%I%shello interval mismatch.", p->name, beg, faddr, rec);
log(L_ERR, "%s%I%sbad netmask %I.", beg, nrid, rec, mask);
return;
}
if(ntohl(ps->deadint)!=ifa->helloint*ifa->deadc)
if (ntohs(ps->helloint) != ifa->helloint)
{
log("%s%s%I%sdead interval mismatch.", p->name, beg, faddr, rec);
log(L_WARN "%s%I%shello interval mismatch.", beg, faddr, rec);
return;
}
if(ps->options!=ifa->options)
if (ntohl(ps->deadint) != ifa->helloint * ifa->deadc)
{
log("%s%s%I%soptions mismatch.", p->name, beg, faddr, rec);
log(L_ERR "%s%I%sdead interval mismatch.", beg, faddr, rec);
return;
}
if((n=find_neigh(ifa, nrid))==NULL)
if (ps->options != ifa->options)
{
if((ifa->type==OSPF_IT_NBMA))
log(L_ERR "%s%I%soptions mismatch.", beg, faddr, rec);
return;
}
if ((n = find_neigh(ifa, nrid)) == NULL)
{
if ((ifa->type == OSPF_IT_NBMA))
{
struct nbma_node *nn;
int found=0;
int found = 0;
WALK_LIST(nn,ifa->nbma_list)
WALK_LIST(nn, ifa->nbma_list)
{
if(ipa_compare(faddr,nn->ip)==0)
if (ipa_compare(faddr, nn->ip) == 0)
{
found=1;
found = 1;
break;
}
}
if((found==0)&&(ifa->strictnbma))
if ((found == 0) && (ifa->strictnbma))
{
log("%s: Ignoring new neighbor: %I on %s.", p->name, faddr,
ifa->iface->name);
log(L_WARN "Ignoring new neighbor: %I on %s.", faddr,
ifa->iface->name);
return;
}
if(found)
if (found)
{
eligible=nn->eligible;
if(((ps->priority==0)&&eligible)||((ps->priority>0)&&(eligible==0)))
{
log("%s: Eligibility mismatch for neighbor: %I on %s", p->name,
faddr, ifa->iface->name);
eligible = nn->eligible;
if (((ps->priority == 0) && eligible)
|| ((ps->priority > 0) && (eligible == 0)))
{
log(L_ERR "Eligibility mismatch for neighbor: %I on %s",
faddr, ifa->iface->name);
return;
}
}
}
}
OSPF_TRACE(D_EVENTS, "New neighbor found: %I on %s.", faddr,
ifa->iface->name);
ifa->iface->name);
n = ospf_neighbor_new(ifa);
n->rid=nrid;
n->ip=faddr;
n->dr=ps->dr;
n->rid = nrid;
n->ip = faddr;
n->dr = ps->dr;
ipa_ntoh(n->dr);
n->bdr=ps->bdr;
n->bdr = ps->bdr;
ipa_ntoh(n->bdr);
n->priority=ps->priority;
n->options=ps->options;
n->priority = ps->priority;
n->options = ps->options;
}
ospf_neigh_sm(n, INM_HELLOREC);
pnrid=(u32 *)((struct ospf_hello_packet *)(ps+1));
pnrid = (u32 *) ((struct ospf_hello_packet *) (ps + 1));
twoway=0;
for(i=0;i<size-(sizeof(struct ospf_hello_packet));i++)
twoway = 0;
for (i = 0; i < size - (sizeof(struct ospf_hello_packet)); i++)
{
if(ntohl(*(pnrid+i))==p->cf->global->router_id)
if (ntohl(*(pnrid + i)) == p->cf->global->router_id)
{
DBG("%s: Twoway received from %I\n", p->name, faddr);
ospf_neigh_sm(n, INM_2WAYREC);
twoway=1;
twoway = 1;
break;
}
}
if(!twoway) ospf_neigh_sm(n, INM_1WAYREC);
if (!twoway)
ospf_neigh_sm(n, INM_1WAYREC);
olddr = n->dr;
n->dr = ipa_ntoh(ps->dr);
@@ -124,39 +127,43 @@ ospf_hello_receive(struct ospf_hello_packet *ps, struct proto *p,
n->priority = ps->priority;
/* Check priority change */
if(n->state>=NEIGHBOR_2WAY)
if (n->state >= NEIGHBOR_2WAY)
{
if(n->priority!=oldpriority) ospf_int_sm(ifa, ISM_NEICH);
if (n->priority != oldpriority)
ospf_int_sm(ifa, ISM_NEICH);
/* Router is declaring itself ad DR and there is no BDR */
if((ipa_compare(n->ip,n->dr)==0) && (ipa_to_u32(n->bdr)==0)
&& (n->state!=NEIGHBOR_FULL))
if ((ipa_compare(n->ip, n->dr) == 0) && (ipa_to_u32(n->bdr) == 0)
&& (n->state != NEIGHBOR_FULL))
ospf_int_sm(ifa, ISM_BACKS);
/* Neighbor is declaring itself as BDR */
if((ipa_compare(n->ip,n->bdr)==0) && (n->state!=NEIGHBOR_FULL))
if ((ipa_compare(n->ip, n->bdr) == 0) && (n->state != NEIGHBOR_FULL))
ospf_int_sm(ifa, ISM_BACKS);
/* Neighbor is newly declaring itself as DR or BDR */
if(((ipa_compare(n->ip,n->dr)==0) && (ipa_compare(n->dr,olddr)!=0))
|| ((ipa_compare(n->ip,n->bdr)==0) && (ipa_compare(n->bdr,oldbdr)!=0)))
if (((ipa_compare(n->ip, n->dr) == 0) && (ipa_compare(n->dr, olddr) != 0))
|| ((ipa_compare(n->ip, n->bdr) == 0)
&& (ipa_compare(n->bdr, oldbdr) != 0)))
ospf_int_sm(ifa, ISM_NEICH);
/* Neighbor is no more declaring itself as DR or BDR */
if(((ipa_compare(n->ip,olddr)==0) && (ipa_compare(n->dr,olddr)!=0))
|| ((ipa_compare(n->ip,oldbdr)==0) && (ipa_compare(n->bdr,oldbdr)!=0)))
if (((ipa_compare(n->ip, olddr) == 0) && (ipa_compare(n->dr, olddr) != 0))
|| ((ipa_compare(n->ip, oldbdr) == 0)
&& (ipa_compare(n->bdr, oldbdr) != 0)))
ospf_int_sm(ifa, ISM_NEICH);
}
if(ifa->type!=OSPF_IT_NBMA)
if (ifa->type != OSPF_IT_NBMA)
{
if((ifa->priority==0)&&(n->priority>0)) ospf_hello_send(NULL, 0, n);
if ((ifa->priority == 0) && (n->priority > 0))
ospf_hello_send(NULL, 0, n);
}
ospf_neigh_sm(n, INM_HELLOREC);
}
void
ospf_hello_send(timer *timer,int poll, struct ospf_neighbor *dirn)
ospf_hello_send(timer * timer, int poll, struct ospf_neighbor *dirn)
{
struct ospf_iface *ifa;
struct ospf_hello_packet *pkt;
@@ -167,104 +174,109 @@ ospf_hello_send(timer *timer,int poll, struct ospf_neighbor *dirn)
u32 *pp;
u8 i;
if(timer==NULL) ifa=dirn->ifa;
else ifa=(struct ospf_iface *)timer->data;
if (timer == NULL)
ifa = dirn->ifa;
else
ifa = (struct ospf_iface *) timer->data;
if(ifa->stub) return; /* Don't send any packet on stub iface */
if (ifa->stub)
return; /* Don't send any packet on stub iface */
p=(struct proto *)(ifa->proto);
p = (struct proto *) (ifa->proto);
DBG("%s: Hello/Poll timer fired on interface %s.\n",
p->name, ifa->iface->name);
p->name, ifa->iface->name);
/* Now we should send a hello packet */
/* First a common packet header */
if(ifa->type!=OSPF_IT_NBMA)
if (ifa->type != OSPF_IT_NBMA)
{
pkt=(struct ospf_hello_packet *)(ifa->hello_sk->tbuf);
pkt = (struct ospf_hello_packet *) (ifa->hello_sk->tbuf);
}
else
else
{
pkt=(struct ospf_hello_packet *)(ifa->ip_sk->tbuf);
pkt = (struct ospf_hello_packet *) (ifa->ip_sk->tbuf);
}
/* Now fill ospf_hello header */
op=(struct ospf_packet *)pkt;
op = (struct ospf_packet *) pkt;
fill_ospf_pkt_hdr(ifa, pkt, HELLO_P);
pkt->netmask=ipa_mkmask(ifa->iface->addr->pxlen);
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=ifa->drip;
pkt->helloint = ntohs(ifa->helloint);
pkt->options = ifa->options;
pkt->priority = ifa->priority;
pkt->deadint = htonl(ifa->deadc * ifa->helloint);
pkt->dr = ifa->drip;
ipa_hton(pkt->dr);
pkt->bdr=ifa->bdrip;
pkt->bdr = ifa->bdrip;
ipa_hton(pkt->bdr);
/* Fill all neighbors */
i=0;
pp=(u32 *)(((u8 *)pkt)+sizeof(struct ospf_hello_packet));
WALK_LIST (neigh, ifa->neigh_list)
i = 0;
pp = (u32 *) (((u8 *) pkt) + sizeof(struct ospf_hello_packet));
WALK_LIST(neigh, ifa->neigh_list)
{
*(pp+i)=htonl(neigh->rid);
*(pp + i) = htonl(neigh->rid);
i++;
}
length=sizeof(struct ospf_hello_packet)+i*sizeof(u32);
op->length=htons(length);
length = sizeof(struct ospf_hello_packet) + i * sizeof(u32);
op->length = htons(length);
ospf_pkt_finalize(ifa, op);
/* And finally send it :-) */
if(ifa->type!=OSPF_IT_NBMA)
/* And finally send it :-) */
if (ifa->type != OSPF_IT_NBMA)
{
sk_send(ifa->hello_sk,length);
sk_send(ifa->hello_sk, length);
}
else /* NBMA */
else /* NBMA */
{
struct ospf_neighbor *n1;
struct nbma_node *nb;
int send;
if(timer==NULL) /* Response to received hello */
if (timer == NULL) /* Response to received hello */
{
sk_send_to(ifa->ip_sk, length, dirn->ip, OSPF_PROTO);
}
else
{
int toall=0;
int meeli=0;
if(ifa->state>OSPF_IS_DROTHER) toall=1;
if(ifa->priority>0) meeli=1;
int toall = 0;
int meeli = 0;
if (ifa->state > OSPF_IS_DROTHER)
toall = 1;
if (ifa->priority > 0)
meeli = 1;
WALK_LIST(nb,ifa->nbma_list)
WALK_LIST(nb, ifa->nbma_list)
{
send=1;
WALK_LIST(n1, ifa->neigh_list)
{
if(ipa_compare(nb->ip,n1->ip)==0)
{
send=0;
break;
}
}
if((poll==1)&&(send))
send = 1;
WALK_LIST(n1, ifa->neigh_list)
{
if(toall||(meeli&&nb->eligible))
sk_send_to(ifa->ip_sk, length, nb->ip, OSPF_PROTO);
if (ipa_compare(nb->ip, n1->ip) == 0)
{
send = 0;
break;
}
}
if ((poll == 1) && (send))
{
if (toall || (meeli && nb->eligible))
sk_send_to(ifa->ip_sk, length, nb->ip, OSPF_PROTO);
}
}
if(poll==0)
if (poll == 0)
{
WALK_LIST(n1,ifa->neigh_list)
{
if(toall||(n1->rid==ifa->drid)||(n1->rid==ifa->bdrid)||
(meeli&&(n1->priority>0)))
sk_send_to(ifa->ip_sk, length, n1->ip, OSPF_PROTO);
}
WALK_LIST(n1, ifa->neigh_list)
{
if (toall || (n1->rid == ifa->drid) || (n1->rid == ifa->bdrid) ||
(meeli && (n1->priority > 0)))
sk_send_to(ifa->ip_sk, length, n1->ip, OSPF_PROTO);
}
}
}
}
OSPF_TRACE(D_PACKETS, "Hello sent via %s",ifa->iface->name);
OSPF_TRACE(D_PACKETS, "Hello sent via %s", ifa->iface->name);
}

6
proto/ospf/hello.h
View File

@@ -10,8 +10,8 @@
#ifndef _BIRD_OSPF_HELLO_H_
#define _BIRD_OSPF_HELLO_H_
void ospf_hello_receive(struct ospf_hello_packet *ps, struct proto *p,
struct ospf_iface *ifa, int size, ip_addr faddr);
void ospf_hello_send(timer *timer,int poll, struct ospf_neighbor *dirn);
void ospf_hello_receive(struct ospf_hello_packet *ps,
struct ospf_iface *ifa, int size, ip_addr faddr);
void ospf_hello_send(timer * timer, int poll, struct ospf_neighbor *dirn);
#endif /* _BIRD_OSPF_HELLO_H_ */

2
proto/ospf/packet.c
View File

@@ -175,7 +175,7 @@ ospf_rx_hook (sock * sk, int size)
{
case HELLO_P:
DBG ("%s: Hello received.\n", p->name);
ospf_hello_receive((struct ospf_hello_packet *) ps, p, ifa, size,
ospf_hello_receive((struct ospf_hello_packet *) ps, ifa, size,
sk->faddr);
break;
case DBDES_P: