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https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 01:31:55 +00:00
Endianity problem fixed. Thanx to Srs Jzsef
This commit is contained in:
Ondrej Filip
parent
35a86ceb40
commit
00bd27a1cc
@ -1,7 +1,7 @@
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/*
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* BIRD -- OSPF
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*
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* (c) 1999 - 2000 Ondrej Filip <feela@network.cz>
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* (c) 1999 - 2003 Ondrej Filip <feela@network.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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@ -9,60 +9,65 @@
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#include "ospf.h"
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void
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fill_ospf_pkt_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
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fill_ospf_pkt_hdr (struct ospf_iface *ifa, void *buf, u8 h_type)
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{
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struct ospf_packet *pkt;
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struct proto *p;
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p=(struct proto *)(ifa->proto);
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pkt=(struct ospf_packet *)buf;
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p = (struct proto *) (ifa->proto);
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pkt->version=OSPF_VERSION;
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pkt = (struct ospf_packet *) buf;
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pkt->type=h_type;
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pkt->version = OSPF_VERSION;
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pkt->routerid=htonl(p->cf->global->router_id);
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pkt->areaid=htonl(ifa->an);
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pkt->autype=htons(ifa->autype);
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pkt->checksum=0;
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pkt->type = h_type;
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pkt->routerid = htonl (p->cf->global->router_id);
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pkt->areaid = htonl (ifa->an);
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pkt->autype = htons (ifa->autype);
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pkt->checksum = 0;
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}
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void
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ospf_tx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt)
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ospf_tx_authenticate (struct ospf_iface *ifa, struct ospf_packet *pkt)
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{
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int i;
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pkt->autype=ifa->autype;
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memcpy(pkt->authetication, ifa->aukey, 8);
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pkt->autype = htons (ifa->autype);
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memcpy (pkt->authetication, ifa->aukey, 8);
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return;
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}
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int
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ospf_rx_authenticate(struct ospf_iface *ifa, struct ospf_packet *pkt)
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ospf_rx_authenticate (struct ospf_iface *ifa, struct ospf_packet *pkt)
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{
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int i;
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if(pkt->autype!=ifa->autype) return 0;
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if(ifa->autype==AU_NONE) return 1;
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if(ifa->autype==AU_SIMPLE)
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{
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for(i=0;i<8;i++)
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{
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if(pkt->authetication[i]!=ifa->aukey[i]) return 0;
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}
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if (pkt->autype != htons (ifa->autype))
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return 0;
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if (ifa->autype == AU_NONE)
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return 1;
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}
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if (ifa->autype == AU_SIMPLE)
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{
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for (i = 0; i < 8; i++)
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{
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if (pkt->authetication[i] != ifa->aukey[i])
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return 0;
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}
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return 1;
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}
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return 0;
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}
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void
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ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
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ospf_pkt_finalize (struct ospf_iface *ifa, struct ospf_packet *pkt)
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{
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ospf_tx_authenticate(ifa, pkt);
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ospf_tx_authenticate (ifa, pkt);
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/* Count checksum */
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pkt->checksum=ipsum_calculate(pkt,sizeof(struct ospf_packet)-8,
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(pkt+1),ntohs(pkt->length)-sizeof(struct ospf_packet),NULL);
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pkt->checksum = ipsum_calculate (pkt, sizeof (struct ospf_packet) - 8,
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(pkt + 1),
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ntohs (pkt->length) -
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sizeof (struct ospf_packet), NULL);
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}
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/**
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@ -75,166 +80,171 @@ ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
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* non generic functions.
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*/
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int
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ospf_rx_hook(sock *sk, int size)
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ospf_rx_hook (sock * sk, int size)
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{
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#ifndef IPV6
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struct ospf_packet *ps;
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struct ospf_iface *ifa=(struct ospf_iface *)(sk->data);
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struct proto *p=(struct proto *)(ifa->proto);
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struct ospf_iface *ifa = (struct ospf_iface *) (sk->data);
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struct proto *p = (struct proto *) (ifa->proto);
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int i;
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u8 *pu8;
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if(ifa->stub) return(1);
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if (ifa->stub)
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return (1);
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DBG("%s: RX_Hook called on interface %s.\n",p->name, sk->iface->name);
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DBG ("%s: RX_Hook called on interface %s.\n", p->name, sk->iface->name);
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ps = (struct ospf_packet *) ipv4_skip_header(sk->rbuf, &size);
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if(ps==NULL)
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{
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log("%s: Bad OSPF packet received: bad IP header", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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if((unsigned)size < sizeof(struct ospf_packet))
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{
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log("%s: Bad OSPF packet received: too short (%u bytes)", p->name, size);
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log("%s: Discarding",p->name);
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return(1);
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}
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ps = (struct ospf_packet *) ipv4_skip_header (sk->rbuf, &size);
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if (ps == NULL)
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{
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log ("%s: Bad OSPF packet received: bad IP header", p->name);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if((ntohs(ps->length)!=size)||(size!=(4*(size/4))))
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{
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log("%s: Bad OSPF packet received: size field does not match", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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if ((unsigned) size < sizeof (struct ospf_packet))
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{
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log ("%s: Bad OSPF packet received: too short (%u bytes)", p->name,
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size);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if(ps->version!=OSPF_VERSION)
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{
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log("%s: Bad OSPF packet received: version %u", p->name, ps->version);
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log("%s: Discarding",p->name);
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return(1);
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}
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if ((ntohs (ps->length) != size) || (size != (4 * (size / 4))))
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{
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log ("%s: Bad OSPF packet received: size field does not match",
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p->name);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if(!ipsum_verify(ps, 16,(void *)ps+sizeof(struct ospf_packet),
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ntohs(ps->length)-sizeof(struct ospf_packet), NULL))
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{
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log("%s: Bad OSPF packet received: bad checksum", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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if (ps->version != OSPF_VERSION)
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{
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log ("%s: Bad OSPF packet received: version %u", p->name, ps->version);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if(!ospf_rx_authenticate(ifa,ps))
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{
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log("%s: Bad OSPF packet received: bad password", p->name);
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return(1);
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}
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if (!ipsum_verify (ps, 16, (void *) ps + sizeof (struct ospf_packet),
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ntohs (ps->length) - sizeof (struct ospf_packet), NULL))
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{
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log ("%s: Bad OSPF packet received: bad checksum", p->name);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if(ntohl(ps->areaid)!=ifa->an)
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{
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log("%s: Bad OSPF packet received: other area %ld", p->name, ps->areaid);
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log("%s: Discarding",p->name);
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return(1);
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}
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if (!ospf_rx_authenticate (ifa, ps))
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{
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log ("%s: Bad OSPF packet received: bad password", p->name);
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return (1);
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}
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if(ntohl(ps->routerid)==p->cf->global->router_id)
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{
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log("%s: Bad OSPF packet received: received my own router ID!", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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if (ntohl (ps->areaid) != ifa->an)
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{
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log ("%s: Bad OSPF packet received: other area %ld", p->name,
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ps->areaid);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if (ntohl (ps->routerid) == p->cf->global->router_id)
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{
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log ("%s: Bad OSPF packet received: received my own router ID!",
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p->name);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if (ntohl (ps->routerid) == 0)
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{
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log ("%s: Bad OSPF packet received: Id 0.0.0.0 is not allowed.",
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p->name);
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log ("%s: Discarding", p->name);
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return (1);
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}
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if(ntohl(ps->routerid)==0)
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{
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log("%s: Bad OSPF packet received: Id 0.0.0.0 is not allowed.", p->name);
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log("%s: Discarding",p->name);
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return(1);
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}
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/* Dump packet
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pu8=(u8 *)(sk->rbuf+5*4);
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for(i=0;i<ntohs(ps->length);i+=4)
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DBG("%s: received %u,%u,%u,%u\n",p->name, pu8[i+0], pu8[i+1], pu8[i+2],
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pu8[i+3]);
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DBG("%s: received size: %u\n",p->name,size);
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*/
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pu8=(u8 *)(sk->rbuf+5*4);
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for(i=0;i<ntohs(ps->length);i+=4)
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DBG("%s: received %u,%u,%u,%u\n",p->name, pu8[i+0], pu8[i+1], pu8[i+2],
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pu8[i+3]);
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DBG("%s: received size: %u\n",p->name,size);
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*/
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switch(ps->type)
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{
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switch (ps->type)
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{
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case HELLO_P:
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DBG("%s: Hello received.\n", p->name);
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ospf_hello_rx((struct ospf_hello_packet *)ps, p, ifa, size, sk->faddr);
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DBG ("%s: Hello received.\n", p->name);
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ospf_hello_rx ((struct ospf_hello_packet *) ps, p, ifa, size,
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sk->faddr);
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break;
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case DBDES_P:
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DBG("%s: Database description received.\n", p->name);
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ospf_dbdes_rx((struct ospf_dbdes_packet *)ps, p, ifa, size);
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DBG ("%s: Database description received.\n", p->name);
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ospf_dbdes_rx ((struct ospf_dbdes_packet *) ps, p, ifa, size);
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break;
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case LSREQ_P:
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DBG("%s: Link state request received.\n", p->name);
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ospf_lsreq_rx((struct ospf_lsreq_packet *)ps, p, ifa, size);
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DBG ("%s: Link state request received.\n", p->name);
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ospf_lsreq_rx ((struct ospf_lsreq_packet *) ps, p, ifa, size);
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break;
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case LSUPD_P:
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DBG("%s: Link state update received.\n", p->name);
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ospf_lsupd_rx((struct ospf_lsupd_packet *)ps, p, ifa, size);
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DBG ("%s: Link state update received.\n", p->name);
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ospf_lsupd_rx ((struct ospf_lsupd_packet *) ps, p, ifa, size);
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break;
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case LSACK_P:
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DBG("%s: Link state ack received.\n", p->name);
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ospf_lsack_rx((struct ospf_lsack_packet *)ps, p, ifa, size);
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DBG ("%s: Link state ack received.\n", p->name);
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ospf_lsack_rx ((struct ospf_lsack_packet *) ps, p, ifa, size);
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break;
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default:
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log("%s: Bad packet received: wrong type %u", p->name, ps->type);
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log("%s: Discarding\n",p->name);
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return(1);
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};
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log ("%s: Bad packet received: wrong type %u", p->name, ps->type);
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log ("%s: Discarding\n", p->name);
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return (1);
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};
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#else
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#error RX_Hook does not work for IPv6 now.
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#endif
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return(1);
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return (1);
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}
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void
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ospf_tx_hook(sock *sk)
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ospf_tx_hook (sock * sk)
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{
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struct ospf_iface *ifa;
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struct proto *p;
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ifa=(struct ospf_iface *)(sk->data);
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ifa = (struct ospf_iface *) (sk->data);
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p=(struct proto *)(ifa->proto);
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DBG("%s: TX_Hook called on interface %s\n", p->name,sk->iface->name);
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p = (struct proto *) (ifa->proto);
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DBG ("%s: TX_Hook called on interface %s\n", p->name, sk->iface->name);
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}
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void
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ospf_err_hook(sock *sk, int err)
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ospf_err_hook (sock * sk, int err)
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{
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struct ospf_iface *ifa;
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struct proto *p;
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ifa=(struct ospf_iface *)(sk->data);
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ifa = (struct ospf_iface *) (sk->data);
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p=(struct proto *)(ifa->proto);
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DBG("%s: Err_Hook called on interface %s\n", p->name,sk->iface->name);
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p = (struct proto *) (ifa->proto);
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DBG ("%s: Err_Hook called on interface %s\n", p->name, sk->iface->name);
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}
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void
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sk_send_to_agt(sock *sk, u16 len, struct ospf_iface *ifa, u8 state)
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sk_send_to_agt (sock * sk, u16 len, struct ospf_iface *ifa, u8 state)
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{
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struct ospf_neighbor *n;
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WALK_LIST(NODE n,ifa->neigh_list)
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if(n->state>=state)
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sk_send_to(sk, len, n->ip, OSPF_PROTO);
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}
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void
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sk_send_to_bdr(sock *sk, u16 len, struct ospf_iface *ifa)
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{
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struct ospf_neighbor *n;
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if(ipa_compare(ifa->drip,ipa_from_u32(0))!=0)
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sk_send_to(sk, len, ifa->drip, OSPF_PROTO);
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if(ipa_compare(ifa->bdrip,ipa_from_u32(0))!=0)
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sk_send_to(sk, len, ifa->bdrip, OSPF_PROTO);
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WALK_LIST (NODE n, ifa->neigh_list) if (n->state >= state)
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sk_send_to (sk, len, n->ip, OSPF_PROTO);
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}
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void
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sk_send_to_bdr (sock * sk, u16 len, struct ospf_iface *ifa)
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{
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struct ospf_neighbor *n;
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if (ipa_compare (ifa->drip, ipa_from_u32 (0)) != 0)
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sk_send_to (sk, len, ifa->drip, OSPF_PROTO);
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if (ipa_compare (ifa->bdrip, ipa_from_u32 (0)) != 0)
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sk_send_to (sk, len, ifa->bdrip, OSPF_PROTO);
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}
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