bsd/netinet/ip_mroute.c

68 #include <netinet/ip.h>
82 extern int	_ip_mforward(struct ip *ip, struct ifnet *ifp,
124 _ip_mforward(__unused struct ip *ip, __unused struct ifnet *ifp,
130 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
262 static struct ip multicast_encap_iphdr = {
264 	sizeof(struct ip) >> 2, IPVERSION,
266 	IPVERSION, sizeof(struct ip) >> 2,
269 	sizeof(struct ip),		/* total length */
285  * given a datagram's src ip address.
291 static int	X_ip_mforward(struct ip *ip, struct ifnet *ifp, struct mbuf *m, struct ip_moptions *imo);
310 static void phyint_send(struct ip *, struct vif *, struct mbuf *);
311 static void encap_send(struct ip *, struct vif *, struct mbuf *);
312 static void tbf_control(struct vif *, struct mbuf *, struct ip *, u_int32_t);
316 static int tbf_dq_sel(struct vif *, struct ip *);
319 static int priority(struct vif *, struct ip *);
1053  * pointed to by "ip" has arrived on (or is about to be sent to) the interface
1066 X_ip_mforward(struct ip *ip, struct ifnet *ifp, struct mbuf *m,
1080 	    (u_int32_t)ntohl(ip->ip_src.s_addr), (u_int32_t)ntohl(ip->ip_dst.s_addr),
1083     if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 ||
1084 	(ipoptions = (u_char *)(ip + 1))[1] != IPOPT_LSRR ) {
1097 		(u_int32_t)ntohl(ip->ip_src.s_addr));
1106 	if (ip->ip_ttl < 255)
1107 		ip->ip_ttl++;	/* compensate for -1 in *_send routines */
1108 	if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) {
1111 		ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), vifi,
1119     if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) {
1121 	    ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr));
1130     if (ip->ip_ttl <= 1 ||
1131 	ntohl(ip->ip_dst.s_addr) <= INADDR_MAX_LOCAL_GROUP)
1137     MFCFIND(ip->ip_src.s_addr, ip->ip_dst.s_addr, rt);
1152 	int hlen = ip->ip_hl << 2;
1162 		(u_int32_t)ntohl(ip->ip_src.s_addr),
1163 		(u_int32_t)ntohl(ip->ip_dst.s_addr));
1183 	hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr);
1185 	    if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) &&
1186 		(ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) &&
1215 	    k_igmpsrc.sin_addr = ip->ip_src;
1233 	    rt->mfc_origin.s_addr     = ip->ip_src.s_addr;
1234 	    rt->mfc_mcastgrp.s_addr   = ip->ip_dst.s_addr;
1277 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
1339     struct ip  *ip = mtod(m, struct ip *);
1342     int plen = ip->ip_len;
1349 #define MC_SEND(ip,vifp,m) {                             \
1351                     encap_send((ip), (vifp), (m));       \
1353                     phyint_send((ip), (vifp), (m));      \
1362 	MC_SEND(ip, viftable + xmt_vif, m);
1388 	    int hlen = ip->ip_hl << 2;
1420     if (ip->ip_src.s_addr == viftable[vifi].v_lcl_addr.s_addr) {
1438 	    (ip->ip_ttl > rt->mfc_ttls[vifi])) {
1441 	    MC_SEND(ip, vifp, m);
1481 phyint_send(struct ip *ip, struct vif *vifp, struct mbuf *m)
1484     int hlen = ip->ip_hl << 2;
1500 	tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len);
1504 encap_send(struct ip *ip, struct vif *vifp, struct mbuf *m)
1507     struct ip *ip_copy;
1508     int i, len = ip->ip_len;
1539     ip_copy = mtod(mb_copy, struct ip *);
1553     ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr));
1554     --ip->ip_ttl;
1557     HTONS(ip->ip_len);
1558     HTONS(ip->ip_off);
1561     ip->ip_sum = 0;
1563     ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2);
1569 	tbf_control(vifp, mb_copy, ip, ip_copy->ip_len);
1573  * De-encapsulate a packet and feed it back through ip input (this
1585     struct ip *ip = mtod(m, struct ip *);
1586     int hlen = ip->ip_hl << 2;
1600     if (! IN_MULTICAST(ntohl(((struct ip *)((char *)ip + hlen))->ip_dst.s_addr))) {
1605     if (ip->ip_src.s_addr != last_encap_src) {
1610 	last_encap_src = ip->ip_src.s_addr;
1613 	    if (vifp->v_rmt_addr.s_addr == ip->ip_src.s_addr) {
1626 		(u_int32_t)ntohl(ip->ip_src.s_addr));
1646 tbf_control(struct vif *vifp, struct mbuf *m, struct ip *ip,
1681 	if (!tbf_dq_sel(vifp, ip)) {
1739 	len = mtod(m, struct ip *)->ip_len;
1781 tbf_dq_sel(struct vif *vifp, struct ip *ip)
1788     p = priority(vifp, ip);
1793 	if (p > priority(vifp, mtod(m, struct ip *))) {
1832 	imo->imo_multicast_ttl  = mtod(m, struct ip *)->ip_ttl - 1;
1885 priority(__unused struct vif *vifp, struct ip *ip)
1898     if (ip->ip_p == IPPROTO_UDP) {
1899 	struct udphdr *udp = (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2));
2039     struct ip *ip = mtod(m, struct ip *);
2089     rsvp_src.sin_addr = ip->ip_src;