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Endianity problem fixed. Thanx to Srs Jzsef

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This commit is contained in:
Ondrej Filip 2003-09-14 13:41:24 +00:00
parent 35a86ceb40
commit 00bd27a1cc
1 changed files with 146 additions and 136 deletions
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282
proto/ospf/packet.c
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@ -1,7 +1,7 @@
/* /*
* BIRD -- OSPF * BIRD -- OSPF
* *
* (c) 1999 - 2000 Ondrej Filip <feela@network.cz> * (c) 1999 - 2003 Ondrej Filip <feela@network.cz>
* *
* Can be freely distributed and used under the terms of the GNU GPL. * Can be freely distributed and used under the terms of the GNU GPL.
*/ */
@ -9,60 +9,65 @@
#include "ospf.h" #include "ospf.h"
void void
fill_ospf_pkt_hdr(struct ospf_iface *ifa, void *buf, u8 h_type) fill_ospf_pkt_hdr (struct ospf_iface *ifa, void *buf, u8 h_type)
{ {
struct ospf_packet *pkt; struct ospf_packet *pkt;
struct proto *p; struct proto *p;
p=(struct proto *)(ifa->proto);
pkt=(struct ospf_packet *)buf; p = (struct proto *) (ifa->proto);
pkt->version=OSPF_VERSION; pkt = (struct ospf_packet *) buf;
pkt->type=h_type; pkt->version = OSPF_VERSION;
pkt->routerid=htonl(p->cf->global->router_id); pkt->type = h_type;
pkt->areaid=htonl(ifa->an);
pkt->autype=htons(ifa->autype); pkt->routerid = htonl (p->cf->global->router_id);
pkt->checksum=0; pkt->areaid = htonl (ifa->an);
pkt->autype = htons (ifa->autype);
pkt->checksum = 0;
} }
void void
ospf_tx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt) ospf_tx_authenticate (struct ospf_iface *ifa, struct ospf_packet *pkt)
{ {
int i; int i;
pkt->autype=ifa->autype; pkt->autype = htons (ifa->autype);
memcpy(pkt->authetication, ifa->aukey, 8); memcpy (pkt->authetication, ifa->aukey, 8);
return; return;
} }
int int
ospf_rx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt) ospf_rx_authenticate (struct ospf_iface *ifa, struct ospf_packet *pkt)
{ {
int i; int i;
if(pkt->autype!=ifa->autype) return 0; if (pkt->autype != htons (ifa->autype))
if(ifa->autype==AU_NONE) return 1; return 0;
if(ifa->autype==AU_SIMPLE) if (ifa->autype == AU_NONE)
{
for(i=0;i<8;i++)
{
if(pkt->authetication[i]!=ifa->aukey[i]) return 0;
}
return 1; return 1;
} if (ifa->autype == AU_SIMPLE)
{
for (i = 0; i < 8; i++)
{
if (pkt->authetication[i] != ifa->aukey[i])
return 0;
}
return 1;
}
return 0; return 0;
} }
void void
ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt) ospf_pkt_finalize (struct ospf_iface *ifa, struct ospf_packet *pkt)
{ {
ospf_tx_authenticate(ifa, pkt); ospf_tx_authenticate (ifa, pkt);
/* Count checksum */ /* Count checksum */
pkt->checksum=ipsum_calculate(pkt,sizeof(struct ospf_packet)-8, pkt->checksum = ipsum_calculate (pkt, sizeof (struct ospf_packet) - 8,
(pkt+1),ntohs(pkt->length)-sizeof(struct ospf_packet),NULL); (pkt + 1),
ntohs (pkt->length) -
sizeof (struct ospf_packet), NULL);
} }
/** /**
@ -75,166 +80,171 @@ ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
* non generic functions. * non generic functions.
*/ */
int int
ospf_rx_hook(sock *sk, int size) ospf_rx_hook (sock * sk, int size)
{ {
#ifndef IPV6 #ifndef IPV6
struct ospf_packet *ps; struct ospf_packet *ps;
struct ospf_iface *ifa=(struct ospf_iface *)(sk->data); struct ospf_iface *ifa = (struct ospf_iface *) (sk->data);
struct proto *p=(struct proto *)(ifa->proto); struct proto *p = (struct proto *) (ifa->proto);
int i; int i;
u8 *pu8; u8 *pu8;
if(ifa->stub) return(1); if (ifa->stub)
return (1);
DBG("%s: RX_Hook called on interface %s.\n",p->name, sk->iface->name); DBG ("%s: RX_Hook called on interface %s.\n", p->name, sk->iface->name);
ps = (struct ospf_packet *) ipv4_skip_header(sk->rbuf, &size); ps = (struct ospf_packet *) ipv4_skip_header (sk->rbuf, &size);
if(ps==NULL) if (ps == NULL)
{ {
log("%s: Bad OSPF packet received: bad IP header", p->name); log ("%s: Bad OSPF packet received: bad IP header", p->name);
log("%s: Discarding",p->name); log ("%s: Discarding", p->name);
return(1); 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)||(size!=(4*(size/4)))) if ((unsigned) size < sizeof (struct ospf_packet))
{ {
log("%s: Bad OSPF packet received: size field does not match", p->name); log ("%s: Bad OSPF packet received: too short (%u bytes)", p->name,
log("%s: Discarding",p->name); size);
return(1); log ("%s: Discarding", p->name);
} return (1);
}
if(ps->version!=OSPF_VERSION) if ((ntohs (ps->length) != size) || (size != (4 * (size / 4))))
{ {
log("%s: Bad OSPF packet received: version %u", p->name, ps->version); log ("%s: Bad OSPF packet received: size field does not match",
log("%s: Discarding",p->name); p->name);
return(1); log ("%s: Discarding", p->name);
} return (1);
}
if(!ipsum_verify(ps, 16,(void *)ps+sizeof(struct ospf_packet), if (ps->version != OSPF_VERSION)
ntohs(ps->length)-sizeof(struct ospf_packet), NULL)) {
{ log ("%s: Bad OSPF packet received: version %u", p->name, ps->version);
log("%s: Bad OSPF packet received: bad checksum", p->name); log ("%s: Discarding", p->name);
log("%s: Discarding",p->name); return (1);
return(1); }
}
if(!ospf_rx_authenticate(ifa,ps)) 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 password", p->name); {
return(1); log ("%s: Bad OSPF packet received: bad checksum", p->name);
} log ("%s: Discarding", p->name);
return (1);
}
if(ntohl(ps->areaid)!=ifa->an) if (!ospf_rx_authenticate (ifa, ps))
{ {
log("%s: Bad OSPF packet received: other area %ld", p->name, ps->areaid); log ("%s: Bad OSPF packet received: bad password", p->name);
log("%s: Discarding",p->name); return (1);
return(1); }
}
if(ntohl(ps->routerid)==p->cf->global->router_id) if (ntohl (ps->areaid) != ifa->an)
{ {
log("%s: Bad OSPF packet received: received my own router ID!", p->name); log ("%s: Bad OSPF packet received: other area %ld", p->name,
log("%s: Discarding",p->name); ps->areaid);
return(1); 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 router ID!",
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);
}
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 /* Dump packet
pu8=(u8 *)(sk->rbuf+5*4); pu8=(u8 *)(sk->rbuf+5*4);
for(i=0;i<ntohs(ps->length);i+=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], DBG("%s: received %u,%u,%u,%u\n",p->name, pu8[i+0], pu8[i+1], pu8[i+2],
pu8[i+3]); pu8[i+3]);
DBG("%s: received size: %u\n",p->name,size); DBG("%s: received size: %u\n",p->name,size);
*/ */
switch(ps->type) switch (ps->type)
{ {
case HELLO_P: case HELLO_P:
DBG("%s: Hello received.\n", p->name); DBG ("%s: Hello received.\n", p->name);
ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa, size, sk->faddr); ospf_hello_rx ((struct ospf_hello_packet *) ps, p, ifa, size,
sk->faddr);
break; break;
case DBDES_P: case DBDES_P:
DBG("%s: Database description received.\n", p->name); DBG ("%s: Database description received.\n", p->name);
ospf_dbdes_rx((struct ospf_dbdes_packet *)ps, p, ifa, size); ospf_dbdes_rx ((struct ospf_dbdes_packet *) ps, p, ifa, size);
break; break;
case LSREQ_P: case LSREQ_P:
DBG("%s: Link state request received.\n", p->name); DBG ("%s: Link state request received.\n", p->name);
ospf_lsreq_rx((struct ospf_lsreq_packet *)ps, p, ifa, size); ospf_lsreq_rx ((struct ospf_lsreq_packet *) ps, p, ifa, size);
break; break;
case LSUPD_P: case LSUPD_P:
DBG("%s: Link state update received.\n", p->name); DBG ("%s: Link state update received.\n", p->name);
ospf_lsupd_rx((struct ospf_lsupd_packet *)ps, p, ifa, size); ospf_lsupd_rx ((struct ospf_lsupd_packet *) ps, p, ifa, size);
break; break;
case LSACK_P: case LSACK_P:
DBG("%s: Link state ack received.\n", p->name); DBG ("%s: Link state ack received.\n", p->name);
ospf_lsack_rx((struct ospf_lsack_packet *)ps, p, ifa, size); ospf_lsack_rx ((struct ospf_lsack_packet *) ps, p, ifa, size);
break; break;
default: default:
log("%s: Bad packet received: wrong type %u", p->name, ps->type); log ("%s: Bad packet received: wrong type %u", p->name, ps->type);
log("%s: Discarding\n",p->name); log ("%s: Discarding\n", p->name);
return(1); return (1);
}; };
#else #else
#error RX_Hook does not work for IPv6 now. #error RX_Hook does not work for IPv6 now.
#endif #endif
return(1); return (1);
} }
void void
ospf_tx_hook(sock *sk) ospf_tx_hook (sock * sk)
{ {
struct ospf_iface *ifa; struct ospf_iface *ifa;
struct proto *p; struct proto *p;
ifa=(struct ospf_iface *)(sk->data); ifa = (struct ospf_iface *) (sk->data);
p=(struct proto *)(ifa->proto); p = (struct proto *) (ifa->proto);
DBG("%s: TX_Hook called on interface %s\n", p->name,sk->iface->name); DBG ("%s: TX_Hook called on interface %s\n", p->name, sk->iface->name);
} }
void void
ospf_err_hook(sock *sk, int err) ospf_err_hook (sock * sk, int err)
{ {
struct ospf_iface *ifa; struct ospf_iface *ifa;
struct proto *p; struct proto *p;
ifa=(struct ospf_iface *)(sk->data); ifa = (struct ospf_iface *) (sk->data);
p=(struct proto *)(ifa->proto); p = (struct proto *) (ifa->proto);
DBG("%s: Err_Hook called on interface %s\n", p->name,sk->iface->name); DBG ("%s: Err_Hook called on interface %s\n", p->name, sk->iface->name);
} }
void void
sk_send_to_agt(sock *sk, u16 len, struct ospf_iface *ifa, u8 state) sk_send_to_agt (sock * sk, u16 len, struct ospf_iface *ifa, u8 state)
{ {
struct ospf_neighbor *n; struct ospf_neighbor *n;
WALK_LIST(NODE n,ifa->neigh_list) WALK_LIST (NODE n, ifa->neigh_list) if (n->state >= state)
if(n->state>=state) sk_send_to (sk, len, n->ip, OSPF_PROTO);
sk_send_to(sk, len, n->ip, OSPF_PROTO);
}
void
sk_send_to_bdr(sock *sk, u16 len, struct ospf_iface *ifa)
{
struct ospf_neighbor *n;
if(ipa_compare(ifa->drip,ipa_from_u32(0))!=0)
sk_send_to(sk, len, ifa->drip, OSPF_PROTO);
if(ipa_compare(ifa->bdrip,ipa_from_u32(0))!=0)
sk_send_to(sk, len, ifa->bdrip, OSPF_PROTO);
} }
void
sk_send_to_bdr (sock * sk, u16 len, struct ospf_iface *ifa)
{
struct ospf_neighbor *n;
if (ipa_compare (ifa->drip, ipa_from_u32 (0)) != 0)
sk_send_to (sk, len, ifa->drip, OSPF_PROTO);
if (ipa_compare (ifa->bdrip, ipa_from_u32 (0)) != 0)
sk_send_to (sk, len, ifa->bdrip, OSPF_PROTO);
}