mirror of
https://gitlab.labs.nic.cz/labs/bird.git
synced 2024-05-11 16:54:54 +00:00
Temporary integrated OSPF commit.
This commit is contained in:
Ondrej Zajicek
@@ -2,6 +2,8 @@
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* BIRD -- OSPF
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*
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* (c) 1999--2005 Ondrej Filip <feela@network.cz>
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* (c) 2009--2014 Ondrej Zajicek <santiago@crfreenet.org>
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* (c) 2009--2014 CZ.NIC z.s.p.o.
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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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@@ -13,233 +15,216 @@
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void
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ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type)
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{
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struct proto_ospf *po = ifa->oa->po;
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struct ospf_proto *p = ifa->oa->po;
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struct ospf_packet *pkt;
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pkt = (struct ospf_packet *) buf;
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pkt->version = OSPF_VERSION;
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pkt->version = ospf_get_version(p);
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pkt->type = h_type;
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pkt->routerid = htonl(po->router_id);
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pkt->length = htons(ospf_pkt_maxsize(ifa));
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pkt->routerid = htonl(p->router_id);
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pkt->areaid = htonl(ifa->oa->areaid);
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#ifdef OSPFv3
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pkt->instance_id = ifa->instance_id;
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#endif
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#ifdef OSPFv2
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pkt->autype = htons(ifa->autype);
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#endif
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pkt->checksum = 0;
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pkt->instance_id = ifa->instance_id;
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pkt->autype = ifa->autype;
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}
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unsigned
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uint
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ospf_pkt_maxsize(struct ospf_iface *ifa)
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{
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unsigned headers = SIZE_OF_IP_HEADER;
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uint headers = SIZE_OF_IP_HEADER;
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#ifdef OSPFv2
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/* Relevant just for OSPFv2 */
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if (ifa->autype == OSPF_AUTH_CRYPT)
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headers += OSPF_AUTH_CRYPT_SIZE;
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#endif
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return ifa->tx_length - headers;
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}
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#ifdef OSPFv2
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/* We assume OSPFv2 in ospf_pkt_finalize() */
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static void
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ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
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{
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struct password_item *passwd = NULL;
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void *tail;
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struct MD5Context ctxt;
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char password[OSPF_AUTH_CRYPT_SIZE];
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union ospf_auth *auth = (void *) (pkt + 1);
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uint plen = ntohs(pkt->length);
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pkt->checksum = 0;
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pkt->autype = htons(ifa->autype);
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bzero(&pkt->u, sizeof(union ospf_auth));
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pkt->autype = ifa->autype;
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bzero(auth, sizeof(union ospf_auth));
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/* Compatibility note: pkt->u may contain anything if autype is
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/* Compatibility note: auth may contain anything if autype is
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none, but nonzero values do not work with Mikrotik OSPF */
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switch(ifa->autype)
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switch (ifa->autype)
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{
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case OSPF_AUTH_SIMPLE:
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passwd = password_find(ifa->passwords, 1);
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if (!passwd)
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{
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log( L_ERR "No suitable password found for authentication" );
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return;
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}
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password_cpy(pkt->u.password, passwd->password, sizeof(union ospf_auth));
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case OSPF_AUTH_NONE:
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pkt->checksum = ipsum_calculate(pkt, sizeof(struct ospf_packet) -
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sizeof(union ospf_auth), (pkt + 1),
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ntohs(pkt->length) -
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sizeof(struct ospf_packet), NULL);
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break;
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case OSPF_AUTH_CRYPT:
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passwd = password_find(ifa->passwords, 0);
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if (!passwd)
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{
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log( L_ERR "No suitable password found for authentication" );
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return;
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}
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case OSPF_AUTH_SIMPLE:
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passwd = password_find(ifa->passwords, 1);
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if (!passwd)
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{
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log(L_ERR "No suitable password found for authentication");
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return;
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}
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password_cpy(auth->password, passwd->password, sizeof(union ospf_auth));
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/* Perhaps use random value to prevent replay attacks after
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reboot when system does not have independent RTC? */
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if (!ifa->csn)
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{
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ifa->csn = (u32) now;
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ifa->csn_use = now;
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}
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case OSPF_AUTH_NONE:
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{
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void *body = (void *) (auth + 1);
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uint blen = plen - sizeof(struct ospf_packet) - sizeof(union ospf_auth);
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pkt->checksum = ipsum_calculate(pkt, sizeof(struct ospf_packet), body, blen, NULL);
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}
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break;
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/* We must have sufficient delay between sending a packet and increasing
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CSN to prevent reordering of packets (in a network) with different CSNs */
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if ((now - ifa->csn_use) > 1)
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ifa->csn++;
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case OSPF_AUTH_CRYPT:
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passwd = password_find(ifa->passwords, 0);
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if (!passwd)
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{
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log(L_ERR "No suitable password found for authentication");
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return;
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}
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/* Perhaps use random value to prevent replay attacks after
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reboot when system does not have independent RTC? */
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if (!ifa->csn)
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{
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ifa->csn = (u32) now;
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ifa->csn_use = now;
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}
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pkt->u.md5.keyid = passwd->id;
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pkt->u.md5.len = OSPF_AUTH_CRYPT_SIZE;
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pkt->u.md5.zero = 0;
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pkt->u.md5.csn = htonl(ifa->csn);
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tail = ((void *)pkt) + ntohs(pkt->length);
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MD5Init(&ctxt);
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MD5Update(&ctxt, (char *) pkt, ntohs(pkt->length));
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password_cpy(password, passwd->password, OSPF_AUTH_CRYPT_SIZE);
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MD5Update(&ctxt, password, OSPF_AUTH_CRYPT_SIZE);
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MD5Final(tail, &ctxt);
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break;
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default:
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bug("Unknown authentication type");
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/* We must have sufficient delay between sending a packet and increasing
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CSN to prevent reordering of packets (in a network) with different CSNs */
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if ((now - ifa->csn_use) > 1)
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ifa->csn++;
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ifa->csn_use = now;
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auth->md5.zero = 0;
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auth->md5.keyid = passwd->id;
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auth->md5.len = OSPF_AUTH_CRYPT_SIZE;
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auth->md5.csn = htonl(ifa->csn);
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void *tail = ((void *) pkt) + plen;
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char password[OSPF_AUTH_CRYPT_SIZE];
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password_cpy(password, passwd->password, OSPF_AUTH_CRYPT_SIZE);
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struct MD5Context ctxt;
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MD5Init(&ctxt);
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MD5Update(&ctxt, (char *) pkt, plen);
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MD5Update(&ctxt, password, OSPF_AUTH_CRYPT_SIZE);
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MD5Final(tail, &ctxt);
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break;
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default:
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bug("Unknown authentication type");
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}
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}
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/* We assume OSPFv2 in ospf_pkt_checkauth() */
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static int
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ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_packet *pkt, int size)
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{
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struct proto_ospf *po = ifa->oa->po;
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struct proto *p = &po->proto;
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struct ospf_proto *p = ifa->oa->po;
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union ospf_auth *auth = (void *) (pkt + 1);
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struct password_item *pass = NULL, *ptmp;
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void *tail;
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char md5sum[OSPF_AUTH_CRYPT_SIZE];
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char password[OSPF_AUTH_CRYPT_SIZE];
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struct MD5Context ctxt;
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uint plen = ntohs(pkt->length);
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u8 autype = pkt->autype;
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if (pkt->autype != htons(ifa->autype))
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if (autype != ifa->autype)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: Method differs (%d)", ntohs(pkt->autype));
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OSPF_TRACE(D_PACKETS, "OSPF_auth: Method differs (%d)", autype);
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return 0;
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}
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switch(ifa->autype)
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switch (autype)
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{
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case OSPF_AUTH_NONE:
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return 1;
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break;
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case OSPF_AUTH_SIMPLE:
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pass = password_find(ifa->passwords, 1);
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if (!pass)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: no password found");
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return 0;
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}
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password_cpy(password, pass->password, sizeof(union ospf_auth));
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case OSPF_AUTH_NONE:
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return 1;
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if (memcmp(pkt->u.password, password, sizeof(union ospf_auth)))
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{
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char ppass[sizeof(union ospf_auth) + 1];
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bzero(ppass, (sizeof(union ospf_auth) + 1));
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memcpy(ppass, pkt->u.password, sizeof(union ospf_auth));
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OSPF_TRACE(D_PACKETS, "OSPF_auth: different passwords (%s)", ppass);
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return 0;
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}
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return 1;
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break;
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case OSPF_AUTH_CRYPT:
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if (pkt->u.md5.len != OSPF_AUTH_CRYPT_SIZE)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: wrong size of md5 digest");
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return 0;
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}
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if (ntohs(pkt->length) + OSPF_AUTH_CRYPT_SIZE > size)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: size mismatch (%d vs %d)",
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ntohs(pkt->length) + OSPF_AUTH_CRYPT_SIZE, size);
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return 0;
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}
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tail = ((void *)pkt) + ntohs(pkt->length);
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if (ifa->passwords)
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{
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WALK_LIST(ptmp, *(ifa->passwords))
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{
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if (pkt->u.md5.keyid != ptmp->id) continue;
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if ((ptmp->accfrom > now_real) || (ptmp->accto < now_real)) continue;
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pass = ptmp;
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break;
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}
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}
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if (!pass)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: no suitable md5 password found");
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return 0;
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}
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if (n)
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{
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u32 rcv_csn = ntohl(pkt->u.md5.csn);
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if(rcv_csn < n->csn)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: lower sequence number (rcv %d, old %d)", rcv_csn, n->csn);
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return 0;
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}
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n->csn = rcv_csn;
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}
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MD5Init(&ctxt);
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MD5Update(&ctxt, (char *) pkt, ntohs(pkt->length));
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password_cpy(password, pass->password, OSPF_AUTH_CRYPT_SIZE);
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MD5Update(&ctxt, password, OSPF_AUTH_CRYPT_SIZE);
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MD5Final(md5sum, &ctxt);
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if (memcmp(md5sum, tail, OSPF_AUTH_CRYPT_SIZE))
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: wrong md5 digest");
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return 0;
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}
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return 1;
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break;
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default:
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OSPF_TRACE(D_PACKETS, "OSPF_auth: unknown auth type");
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case OSPF_AUTH_SIMPLE:
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pass = password_find(ifa->passwords, 1);
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if (!pass)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: no password found");
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return 0;
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}
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password_cpy(password, pass->password, sizeof(union ospf_auth));
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if (memcmp(auth->password, password, sizeof(union ospf_auth)))
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: different passwords");
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return 0;
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}
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return 1;
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case OSPF_AUTH_CRYPT:
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if (auth->md5.len != OSPF_AUTH_CRYPT_SIZE)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: wrong size of md5 digest");
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return 0;
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}
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if (plen + OSPF_AUTH_CRYPT_SIZE > size)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: size mismatch (%d vs %d)",
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plen + OSPF_AUTH_CRYPT_SIZE, size);
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return 0;
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}
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if (n)
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{
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u32 rcv_csn = ntohl(auth->md5.csn);
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if(rcv_csn < n->csn)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: lower sequence number (rcv %d, old %d)", rcv_csn, n->csn);
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return 0;
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}
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n->csn = rcv_csn;
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}
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if (ifa->passwords)
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{
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WALK_LIST(ptmp, *(ifa->passwords))
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{
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if (auth->md5.keyid != ptmp->id) continue;
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if ((ptmp->accfrom > now_real) || (ptmp->accto < now_real)) continue;
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pass = ptmp;
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break;
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}
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}
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if (!pass)
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: no suitable md5 password found");
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return 0;
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}
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void *tail = ((void *) pkt) + plen;
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char md5sum[OSPF_AUTH_CRYPT_SIZE];
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password_cpy(password, pass->password, OSPF_AUTH_CRYPT_SIZE);
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struct MD5Context ctxt;
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MD5Init(&ctxt);
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MD5Update(&ctxt, (char *) pkt, plen);
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MD5Update(&ctxt, password, OSPF_AUTH_CRYPT_SIZE);
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MD5Final(md5sum, &ctxt);
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if (memcmp(md5sum, tail, OSPF_AUTH_CRYPT_SIZE))
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{
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OSPF_TRACE(D_PACKETS, "OSPF_auth: wrong md5 digest");
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return 0;
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}
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return 1;
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default:
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OSPF_TRACE(D_PACKETS, "OSPF_auth: unknown auth type");
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return 0;
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}
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}
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#else
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/* OSPFv3 authentication not yet supported */
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static inline void
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ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
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{ }
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static int
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ospf_pkt_checkauth(struct ospf_neighbor *n, struct ospf_iface *ifa, struct ospf_packet *pkt, int size)
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{ return 1; }
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#endif
|
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/**
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* ospf_rx_hook
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@@ -266,43 +251,44 @@ ospf_rx_hook(sock *sk, int size)
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/* Initially, the packet is associated with the 'master' iface */
|
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struct ospf_iface *ifa = sk->data;
|
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struct proto_ospf *po = ifa->oa->po;
|
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// struct proto *p = &po->proto;
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struct ospf_proto *p = ifa->oa->po;
|
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|
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int src_local, dst_local UNUSED, dst_mcast;
|
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int src_local, dst_local, dst_mcast;
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src_local = ipa_in_net(sk->faddr, ifa->addr->prefix, ifa->addr->pxlen);
|
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dst_local = ipa_equal(sk->laddr, ifa->addr->ip);
|
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dst_mcast = ipa_equal(sk->laddr, ifa->all_routers) || ipa_equal(sk->laddr, AllDRouters);
|
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dst_mcast = ipa_equal(sk->laddr, ifa->all_routers) || ipa_equal(sk->laddr, ifa->des_routers);
|
||||
|
||||
#ifdef OSPFv2
|
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/* First, we eliminate packets with strange address combinations.
|
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* In OSPFv2, they might be for other ospf_ifaces (with different IP
|
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* prefix) on the same real iface, so we don't log it. We enforce
|
||||
* that (src_local || dst_local), therefore we are eliminating all
|
||||
* such cases.
|
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*/
|
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if (dst_mcast && !src_local)
|
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return 1;
|
||||
if (!dst_mcast && !dst_local)
|
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return 1;
|
||||
if (ospf_is_v2(p))
|
||||
{
|
||||
/* First, we eliminate packets with strange address combinations.
|
||||
* In OSPFv2, they might be for other ospf_ifaces (with different IP
|
||||
* prefix) on the same real iface, so we don't log it. We enforce
|
||||
* that (src_local || dst_local), therefore we are eliminating all
|
||||
* such cases.
|
||||
*/
|
||||
if (dst_mcast && !src_local)
|
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return 1;
|
||||
if (!dst_mcast && !dst_local)
|
||||
return 1;
|
||||
|
||||
/* Ignore my own broadcast packets */
|
||||
if (ifa->cf->real_bcast && ipa_equal(sk->faddr, ifa->addr->ip))
|
||||
return 1;
|
||||
#else /* OSPFv3 */
|
||||
|
||||
/* In OSPFv3, src_local and dst_local mean link-local.
|
||||
* RFC 5340 says that local (non-vlink) packets use
|
||||
* link-local src address, but does not enforce it. Strange.
|
||||
*/
|
||||
if (dst_mcast && !src_local)
|
||||
log(L_WARN "OSPF: Received multicast packet from %I (not link-local)", sk->faddr);
|
||||
#endif
|
||||
/* Ignore my own broadcast packets */
|
||||
if (ifa->cf->real_bcast && ipa_equal(sk->faddr, ifa->addr->ip))
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* In OSPFv3, src_local and dst_local mean link-local.
|
||||
* RFC 5340 says that local (non-vlink) packets use
|
||||
* link-local src address, but does not enforce it. Strange.
|
||||
*/
|
||||
if (dst_mcast && !src_local)
|
||||
log(L_WARN "OSPF: Received multicast packet from %I (not link-local)", sk->faddr);
|
||||
}
|
||||
|
||||
/* Second, we check packet size, checksum, and the protocol version */
|
||||
struct ospf_packet *ps = (struct ospf_packet *) ip_skip_header(sk->rbuf, &size);
|
||||
struct ospf_packet *pkt = (struct ospf_packet *) ip_skip_header(sk->rbuf, &size);
|
||||
|
||||
if (ps == NULL)
|
||||
if (pkt == NULL)
|
||||
{
|
||||
log(L_ERR "%s%I - bad IP header", mesg, sk->faddr);
|
||||
return 1;
|
||||
@@ -314,13 +300,13 @@ ospf_rx_hook(sock *sk, int size)
|
||||
return 1;
|
||||
}
|
||||
|
||||
if ((unsigned) size < sizeof(struct ospf_packet))
|
||||
if ((uint) size < sizeof(struct ospf_packet))
|
||||
{
|
||||
log(L_ERR "%s%I - too short (%u bytes)", mesg, sk->faddr, size);
|
||||
return 1;
|
||||
}
|
||||
|
||||
uint plen = ntohs(ps->length);
|
||||
uint plen = ntohs(pkt->length);
|
||||
if ((plen < sizeof(struct ospf_packet)) || ((plen % 4) != 0))
|
||||
{
|
||||
log(L_ERR "%s%I - invalid length (%u)", mesg, sk->faddr, plen);
|
||||
@@ -348,89 +334,101 @@ ospf_rx_hook(sock *sk, int size)
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (ps->version != OSPF_VERSION)
|
||||
if (pkt->version != ospf_get_version(p))
|
||||
{
|
||||
log(L_ERR "%s%I - version %u", mesg, sk->faddr, ps->version);
|
||||
log(L_ERR "%s%I - version %u", mesg, sk->faddr, pkt->version);
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifdef OSPFv2
|
||||
if ((ps->autype != htons(OSPF_AUTH_CRYPT)) &&
|
||||
(!ipsum_verify(ps, 16, (void *) ps + sizeof(struct ospf_packet),
|
||||
plen - sizeof(struct ospf_packet), NULL)))
|
||||
if (ospf_is_v2(p) && (pkt->autype != OSPF_AUTH_CRYPT))
|
||||
{
|
||||
log(L_ERR "%s%I - bad checksum", mesg, sk->faddr);
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
uint hlen = sizeof(struct ospf_packet) + sizeof(union ospf_auth);
|
||||
uint blen = plen - hlen;
|
||||
void *body = ((void *) pkt) + hlen;
|
||||
|
||||
if (! ipsum_verify(pkt, sizeof(struct ospf_packet), body, blen, NULL))
|
||||
{
|
||||
log(L_ERR "%s%I - bad checksum", mesg, sk->faddr);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Third, we resolve associated iface and handle vlinks. */
|
||||
|
||||
u32 areaid = ntohl(ps->areaid);
|
||||
u32 rid = ntohl(ps->routerid);
|
||||
u32 areaid = ntohl(pkt->areaid);
|
||||
u32 rid = ntohl(pkt->routerid);
|
||||
u8 instance_id = pkt->instance_id;
|
||||
|
||||
if ((areaid == ifa->oa->areaid)
|
||||
#ifdef OSPFv3
|
||||
&& (ps->instance_id == ifa->instance_id)
|
||||
#endif
|
||||
)
|
||||
if (areaid == ifa->oa->areaid)
|
||||
{
|
||||
/* It is real iface, source should be local (in OSPFv2) */
|
||||
#ifdef OSPFv2
|
||||
if (!src_local)
|
||||
/* Matching area ID */
|
||||
|
||||
if (instance_id != ifa->instance_id)
|
||||
return 1;
|
||||
#endif
|
||||
}
|
||||
else if (dst_mcast || (areaid != 0))
|
||||
{
|
||||
/* Obvious mismatch */
|
||||
|
||||
#ifdef OSPFv2
|
||||
/* We ignore mismatch in OSPFv3, because there might be
|
||||
other instance with different instance ID */
|
||||
log(L_ERR "%s%I - area does not match (%R vs %R)",
|
||||
mesg, sk->faddr, areaid, ifa->oa->areaid);
|
||||
#endif
|
||||
/* It is real iface, source should be local (in OSPFv2) */
|
||||
if (ospf_is_v2(p) && !src_local)
|
||||
{
|
||||
log(L_ERR "%s%I - strange source address for %s", mesg, sk->faddr, ifa->ifname);
|
||||
return 1;
|
||||
}
|
||||
|
||||
goto found;
|
||||
}
|
||||
else if ((areaid == 0) && !dst_mcast)
|
||||
{
|
||||
/* Backbone area ID and possible vlink packet */
|
||||
|
||||
if ((p->areano == 1) || !oa_is_ext(ifa->oa))
|
||||
return 1;
|
||||
|
||||
struct ospf_iface *iff = NULL;
|
||||
WALK_LIST(iff, p->iface_list)
|
||||
{
|
||||
if ((iff->type == OSPF_IT_VLINK) &&
|
||||
(iff->voa == ifa->oa) &&
|
||||
(iff->instance_id == instance_id) &&
|
||||
(iff->vid == rid))
|
||||
{
|
||||
/* Vlink should be UP */
|
||||
if (iff->state != OSPF_IS_PTP)
|
||||
return 1;
|
||||
|
||||
ifa = iff;
|
||||
goto found;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Cannot find matching vlink. It is either misconfigured vlink; NBMA or
|
||||
* PtMP with misconfigured area ID, or packet for some other instance (that
|
||||
* is possible even if instance_id == ifa->instance_id, because it may be
|
||||
* also vlink packet in the other instance, which is different namespace).
|
||||
*/
|
||||
|
||||
return 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Some vlink? */
|
||||
struct ospf_iface *iff = NULL;
|
||||
/* Non-matching area ID but cannot be vlink packet */
|
||||
|
||||
WALK_LIST(iff, po->iface_list)
|
||||
{
|
||||
if ((iff->type == OSPF_IT_VLINK) &&
|
||||
(iff->voa == ifa->oa) &&
|
||||
#ifdef OSPFv3
|
||||
(iff->instance_id == ps->instance_id) &&
|
||||
#endif
|
||||
(iff->vid == rid))
|
||||
{
|
||||
/* Vlink should be UP */
|
||||
if (iff->state != OSPF_IS_PTP)
|
||||
return 1;
|
||||
|
||||
ifa = iff;
|
||||
goto found;
|
||||
}
|
||||
}
|
||||
if (instance_id != ifa->instance_id)
|
||||
return 1;
|
||||
|
||||
#ifdef OSPFv2
|
||||
log(L_WARN "OSPF: Received packet for unknown vlink (ID %R, IP %I)", rid, sk->faddr);
|
||||
#endif
|
||||
log(L_ERR "%s%I - area does not match (%R vs %R)",
|
||||
mesg, sk->faddr, areaid, ifa->oa->areaid);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
found:
|
||||
if (ifa->stub) /* This shouldn't happen */
|
||||
return 1;
|
||||
|
||||
if (ipa_equal(sk->laddr, AllDRouters) && (ifa->sk_dr == 0))
|
||||
if (ipa_equal(sk->laddr, ifa->des_routers) && (ifa->sk_dr == 0))
|
||||
return 1;
|
||||
|
||||
if (rid == po->router_id)
|
||||
if (rid == p->router_id)
|
||||
{
|
||||
log(L_ERR "%s%I - received my own router ID!", mesg, sk->faddr);
|
||||
return 1;
|
||||
@@ -442,62 +440,51 @@ ospf_rx_hook(sock *sk, int size)
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifdef OSPFv2
|
||||
/* In OSPFv2, neighbors are identified by either IP or Router ID, base on network type */
|
||||
uint t = ifa->type;
|
||||
struct ospf_neighbor *n;
|
||||
if ((ifa->type == OSPF_IT_BCAST) || (ifa->type == OSPF_IT_NBMA) || (ifa->type == OSPF_IT_PTMP))
|
||||
if (ospf_is_v2(p) && ((t == OSPF_IT_BCAST) || (t == OSPF_IT_NBMA) || (t == OSPF_IT_PTMP)))
|
||||
n = find_neigh_by_ip(ifa, sk->faddr);
|
||||
else
|
||||
n = find_neigh(ifa, rid);
|
||||
#else
|
||||
struct ospf_neighbor *n = find_neigh(ifa, rid);
|
||||
#endif
|
||||
|
||||
if(!n && (ps->type != HELLO_P))
|
||||
if (!n && (pkt->type != HELLO_P))
|
||||
{
|
||||
log(L_WARN "OSPF: Received non-hello packet from unknown neighbor (src %I, iface %s)",
|
||||
sk->faddr, ifa->ifname);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (!ospf_pkt_checkauth(n, ifa, ps, size))
|
||||
if (ospf_is_v2(p) && !ospf_pkt_checkauth(n, ifa, pkt, size))
|
||||
{
|
||||
log(L_ERR "%s%I - authentication failed", mesg, sk->faddr);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Dump packet
|
||||
pu8=(u8 *)(sk->rbuf+5*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],
|
||||
pu8[i+3]);
|
||||
DBG("%s: received size: %u\n",p->name,size);
|
||||
*/
|
||||
|
||||
switch (ps->type)
|
||||
switch (pkt->type)
|
||||
{
|
||||
case HELLO_P:
|
||||
DBG("%s: Hello received.\n", p->name);
|
||||
ospf_hello_receive(ps, ifa, n, sk->faddr);
|
||||
ospf_receive_hello(pkt, ifa, n, sk->faddr);
|
||||
break;
|
||||
|
||||
case DBDES_P:
|
||||
DBG("%s: Database description received.\n", p->name);
|
||||
ospf_dbdes_receive(ps, ifa, n);
|
||||
ospf_receive_dbdes(pkt, ifa, n);
|
||||
break;
|
||||
|
||||
case LSREQ_P:
|
||||
DBG("%s: Link state request received.\n", p->name);
|
||||
ospf_lsreq_receive(ps, ifa, n);
|
||||
ospf_receive_lsreq(pkt, ifa, n);
|
||||
break;
|
||||
|
||||
case LSUPD_P:
|
||||
DBG("%s: Link state update received.\n", p->name);
|
||||
ospf_lsupd_receive(ps, ifa, n);
|
||||
ospf_receive_lsupd(pkt, ifa, n);
|
||||
break;
|
||||
|
||||
case LSACK_P:
|
||||
DBG("%s: Link state ack received.\n", p->name);
|
||||
ospf_lsack_receive(ps, ifa, n);
|
||||
ospf_receive_lsack(pkt, ifa, n);
|
||||
break;
|
||||
|
||||
default:
|
||||
log(L_ERR "%s%I - wrong type %u", mesg, sk->faddr, ps->type);
|
||||
log(L_ERR "%s%I - wrong type %u", mesg, sk->faddr, pkt->type);
|
||||
return 1;
|
||||
};
|
||||
return 1;
|
||||
@@ -508,7 +495,7 @@ void
|
||||
ospf_tx_hook(sock * sk)
|
||||
{
|
||||
struct ospf_iface *ifa= (struct ospf_iface *) (sk->data);
|
||||
// struct proto *p = (struct proto *) (ifa->oa->po);
|
||||
// struct proto *p = (struct proto *) (ifa->oa->p);
|
||||
log(L_ERR "OSPF: TX hook called on %s", ifa->ifname);
|
||||
}
|
||||
*/
|
||||
@@ -517,16 +504,35 @@ void
|
||||
ospf_err_hook(sock * sk, int err)
|
||||
{
|
||||
struct ospf_iface *ifa= (struct ospf_iface *) (sk->data);
|
||||
struct proto *p = &(ifa->oa->po->proto);
|
||||
log(L_ERR "%s: Socket error on %s: %M", p->name, ifa->ifname, err);
|
||||
struct ospf_proto *p = ifa->oa->po;
|
||||
log(L_ERR "%s: Socket error on %s: %M", p->p.name, ifa->ifname, err);
|
||||
}
|
||||
|
||||
void
|
||||
ospf_verr_hook(sock *sk, int err)
|
||||
{
|
||||
struct proto_ospf *po = (struct proto_ospf *) (sk->data);
|
||||
struct proto *p = &po->proto;
|
||||
log(L_ERR "%s: Vlink socket error: %M", p->name, err);
|
||||
struct ospf_proto *p = (struct ospf_proto *) (sk->data);
|
||||
log(L_ERR "%s: Vlink socket error: %M", p->p.name, err);
|
||||
}
|
||||
|
||||
void
|
||||
ospf_send_to(struct ospf_iface *ifa, ip_addr dst)
|
||||
{
|
||||
sock *sk = ifa->sk;
|
||||
struct ospf_packet *pkt = (struct ospf_packet *) sk->tbuf;
|
||||
int plen = ntohs(pkt->length);
|
||||
|
||||
if (ospf_is_v2(ifa->oa->po))
|
||||
{
|
||||
if (ifa->autype == OSPF_AUTH_CRYPT)
|
||||
plen += OSPF_AUTH_CRYPT_SIZE;
|
||||
|
||||
ospf_pkt_finalize(ifa, pkt);
|
||||
}
|
||||
|
||||
int done = sk_send_to(sk, plen, dst, 0);
|
||||
if (!done)
|
||||
log(L_WARN "OSPF: TX queue full on %s", ifa->ifname);
|
||||
}
|
||||
|
||||
void
|
||||
@@ -542,28 +548,8 @@ ospf_send_to_agt(struct ospf_iface *ifa, u8 state)
|
||||
void
|
||||
ospf_send_to_bdr(struct ospf_iface *ifa)
|
||||
{
|
||||
if (!ipa_equal(ifa->drip, IPA_NONE))
|
||||
if (ipa_nonzero(ifa->drip))
|
||||
ospf_send_to(ifa, ifa->drip);
|
||||
if (!ipa_equal(ifa->bdrip, IPA_NONE))
|
||||
if (ipa_nonzero(ifa->bdrip))
|
||||
ospf_send_to(ifa, ifa->bdrip);
|
||||
}
|
||||
|
||||
void
|
||||
ospf_send_to(struct ospf_iface *ifa, ip_addr dst)
|
||||
{
|
||||
sock *sk = ifa->sk;
|
||||
struct ospf_packet *pkt = (struct ospf_packet *) sk->tbuf;
|
||||
int len = ntohs(pkt->length);
|
||||
|
||||
#ifdef OSPFv2
|
||||
if (ifa->autype == OSPF_AUTH_CRYPT)
|
||||
len += OSPF_AUTH_CRYPT_SIZE;
|
||||
#endif
|
||||
|
||||
ospf_pkt_finalize(ifa, pkt);
|
||||
|
||||
int done = sk_send_to(sk, len, dst, 0);
|
||||
if (!done)
|
||||
log(L_WARN "OSPF: TX queue full on %s", ifa->ifname);
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user