sys/netinet/ip_output.c

79 #include <netinet/ip.h>
119 	struct ip *ip;
122 	ip = mtod(m, struct ip *);
125 	odst.s_addr = ip->ip_dst.s_addr;
131 	ip = mtod(m, struct ip *);
134 	if (odst.s_addr != ip->ip_dst.s_addr) {
137 		if (in_localip(ip->ip_dst)) {
159 		dst->sin_addr = ip->ip_dst;
220 	struct ip *ip;
223 	int hlen = sizeof (struct ip);
261 			hlen = len; /* ip->ip_hl is updated above */
263 	ip = mtod(m, struct ip *);
264 	ip_len = ntohs(ip->ip_len);
265 	ip_off = ntohs(ip->ip_off);
268 		ip->ip_v = IPVERSION;
269 		ip->ip_hl = hlen >> 2;
270 		ip_fillid(ip);
273 		hlen = ip->ip_hl << 2;
292 		dst->sin_addr = ip->ip_dst;
315 			  dst->sin_addr.s_addr != ip->ip_dst.s_addr)) {
335 		ip->ip_dst.s_addr = INADDR_BROADCAST;
336 		dst->sin_addr = ip->ip_dst;
338 		ip->ip_ttl = 1;
350 		ip->ip_ttl = 1;
353 	} else if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
371 			    ntohl(ip->ip_src.s_addr ^ ip->ip_dst.s_addr),
421 	if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
433 			ip->ip_ttl = imo->imo_multicast_ttl;
435 				ip->ip_src.s_addr =
440 			ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL;
455 		if (ip->ip_src.s_addr == INADDR_ANY) {
458 				ip->ip_src = IA_SIN(ia)->sin_addr;
494 				    ip_mforward(ip, ifp, m, imo) != 0) {
510 		if (ip->ip_ttl == 0 || ifp->if_flags & IFF_LOOPBACK) {
522 	if (ip->ip_src.s_addr == INADDR_ANY) {
525 			ip->ip_src = IA_SIN(ia)->sin_addr;
571 	ip = mtod(m, struct ip *);
572 	hlen = ip->ip_hl << 2;
582 			ip = mtod(m, struct ip *);
591 			ip = mtod(m, struct ip *);
601 	if (IN_LOOPBACK(ntohl(ip->ip_dst.s_addr)) ||
602 	    IN_LOOPBACK(ntohl(ip->ip_src.s_addr))) {
617 		sctp_delayed_cksum(m, (uint32_t)(ip->ip_hl << 2));
628 		ip->ip_sum = 0;
630 			ip->ip_sum = in_cksum(m, hlen);
658 		IP_PROBE(send, NULL, NULL, ip, ifp, ip, NULL);
691 	error = ip_fragment(ip, &m, mtu, ifp->if_hwassist);
710 			IP_PROBE(send, NULL, NULL, mtod(m, struct ip *), ifp,
711 			    mtod(m, struct ip *), NULL);
763 ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
767 	int hlen = ip->ip_hl << 2;
776 	ip_len = ntohs(ip->ip_len);
777 	ip_off = ntohs(ip->ip_off);
827 		if ((newlen + sizeof (struct ip)) > mtu) {
850 		struct ip *mhip;	/* ip header on the fragment */
852 		int mhlen = sizeof (struct ip);
879 		mhip = mtod(m, struct ip *);
880 		*mhip = *ip;
881 		if (hlen > sizeof (struct ip)) {
882 			mhlen = ip_optcopy(ip, mhip) + sizeof (struct ip);
922 	ip->ip_len = htons((u_short)m0->m_pkthdr.len);
923 	ip->ip_off = htons(ip_off | IP_MF);
924 	ip->ip_sum = 0;
926 		ip->ip_sum = in_cksum(m0, hlen);
938 	struct ip *ip;
942 	ip = mtod(m, struct ip *);
943 	offset = ip->ip_hl << 2 ;
959 		cklen = ntohs(ip->ip_len);
1478 	struct ip *ip;
1501 		ip = mtod(copym, struct ip *);
1502 		ip->ip_sum = 0;
1503 		ip->ip_sum = in_cksum(copym, hlen);