sys/netinet/tcp_input.c

92 #include <netinet/ip.h>
577 	struct ip *ip = NULL;
606 	 * The size of tcp_saveipgen must be the size of the max ip header,
615 	isipv6 = (mtod(m, struct ip *)->ip_v == 6) ? 1 : 0;
668 		if (off0 > sizeof (struct ip)) {
670 			off0 = sizeof(struct ip);
679 		ip = mtod(m, struct ip *);
680 		th = (struct tcphdr *)((caddr_t)ip + off0);
681 		tlen = ntohs(ip->ip_len) - off0;
683 		iptos = ip->ip_tos;
688 				th->th_sum = in_pseudo(ip->ip_src.s_addr,
689 				    ip->ip_dst.s_addr,
694 			struct ipovly *ipov = (struct ipovly *)ip;
700 			ipttl = ip->ip_ttl;
705 			ip->ip_len = htons(len);
707 			ip->ip_tos = iptos;
709 			ip->ip_ttl = ipttl;
710 			ip->ip_v = IPVERSION;
711 			ip->ip_hl = off0 >> 2;
750 			if (m->m_len < sizeof(struct ip) + off) {
751 				if ((m = m_pullup(m, sizeof (struct ip) + off))
756 				ip = mtod(m, struct ip *);
757 				th = (struct tcphdr *)((caddr_t)ip + off0);
856 		inp = in_pcblookup_mbuf(&V_tcbinfo, ip->ip_src, th->th_sport,
857 		    ip->ip_dst, th->th_dport, INPLOOKUP_WLOCKPCB,
865 			inp = in_pcblookup(&V_tcbinfo, ip->ip_src,
872 		inp = in_pcblookup_mbuf(&V_tcbinfo, ip->ip_src,
873 		    th->th_sport, ip->ip_dst, th->th_dport,
890 			if ((s = tcp_log_vain(NULL, th, (void *)ip, ip6)))
951 		if (inp->inp_ip_minttl > ip->ip_ttl)
1043 			bcopy((char *)ip, (char *)tcp_saveipgen, sizeof(*ip));
1068 			inc.inc_faddr = ip->ip_src;
1069 			inc.inc_laddr = ip->ip_dst;
1326 			    ip->ip_dst.s_addr == ip->ip_src.s_addr) {
1333 			if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
1334 			    IN_MULTICAST(ntohl(ip->ip_src.s_addr)) ||
1335 			    ip->ip_src.s_addr == htonl(INADDR_BROADCAST) ||
1336 			    in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
1532 	 * The size of tcp_saveipgen must be the size of the max ip header,
3304 	struct ip *ip;
3318 	if (mtod(m, struct ip *)->ip_v == 6) {
3331 		ip = mtod(m, struct ip *);
3332 		if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
3333 		    IN_MULTICAST(ntohl(ip->ip_src.s_addr)) ||
3334 		    ip->ip_src.s_addr == htonl(INADDR_BROADCAST) ||
3335 		    in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif))