ipfilter/netinet/fil.c

64 #include <netinet/ip.h>
1253 	 * type(1) + code(1) + cksum(2) + id(2) seq(2) + ip(20+)
1443 	ip = fin->fin_ip;
1445 	off = IP_HL(ip) << 2;
1689 	ip_t *ip;
1694 	ip = fin->fin_ip;
1695 	p = ip->ip_p;
1698 	fi->fi_tos = ip->ip_tos;
1699 	fin->fin_id = ntohs(ip->ip_id);
1700 	off = ntohs(ip->ip_off);
1703 	fi->fi_p = ip->ip_p;
1704 	fi->fi_ttl = ip->ip_ttl;
1714 	fi->fi_saddr = ip->ip_src.s_addr;
1716 	fi->fi_daddr = ip->ip_dst.s_addr;
1787 	ip = fin->fin_ip;
1788 	if (ip == NULL)
1795 	if (hlen == sizeof(*ip)) {
1811 	for (s = (u_char *)(ip + 1), hlen -= (int)sizeof(*ip); hlen > 0; ) {
2025 /*              ip(I)   - pointer to the IP header                          */
2034 ipf_makefrip(hlen, ip, fin)
2036 	ip_t *ip;
2044 	fin->fin_ip = ip;
2048 	fin->fin_dp = (char *)ip + hlen;
2052 		fin->fin_plen = ntohs(ip->ip_len);
2057 		fin->fin_plen = ntohs(((ip6_t *)ip)->ip6_plen);
2785 /*             ip(I)   - pointer to start of IPv4/6 packet                  */
2807 ipf_check(ctx, ip, hlen, ifp, out
2815 	ip_t *ip;
2829 	int v = IP_V(ip);
2844 	if ((u_int)ip & 0x3)
2918 	fin->fin_ip = ip;
2924 	fin->fin_dp = (char *)ip + hlen;
2927 	fin->fin_ipoff = (char *)ip - MTOD(m, char *);
2939 		if (((ip6_t *)ip)->ip6_plen == 0) {
2940 			DT1(frb_jumbo, ip6_t *, (ip6_t *)ip);
2952 	if (ipf_makefrip(hlen, ip, fin) == -1) {
2979 			if (((ip6_t *)ip)->ip6_hlim < softc->ipf_minttl) {
3380 /*              ip(I)      - pointer to IP header                           */
3385 /* in the IP header "ip" to seed it.                                        */
3394 fr_cksum(fin, ip, l4proto, l4hdr)
3396 	ip_t *ip;
3420 	if (IP_V(ip) == 4) {
3422 		hlen = IP_HL(ip) << 2;
3424 		sp = (u_short *)&ip->ip_src;
3432 	} else if (IP_V(ip) == 6) {
3436 		ip6 = (ip6_t *)ip;
3918 /* Parameters:  ip(I) - 32bit IP address                                    */
3926 count4bits(ip)
3927 	u_32_t	ip;
3932 	ip = ipn = ntohl(ip);
3944 	if (ipn == ip)
6111 	ip_t *ip;
6113 	ip = fin->fin_ip;
6114 	ido = ntohs(ip->ip_id);
6121 		ip->ip_id = htons(id);
6123 		ip_fillid(ip);
6124 		id = ntohs(ip->ip_id);
6132 	sum = (~ntohs(ip->ip_sum)) & 0xffff;
6137 	ip->ip_sum = htons(sums);
8478 	ip_t *ip;
8581 	ip = (ip_t *)((char *)fin->fin_ip + elen);
8587 	if (IP_V(ip) == 4)
8588 		hlen = IP_HL(ip) << 2;
8590 	else if (IP_V(ip) == 6)
8599 	fin->fin_dp = (char *)ip + hlen;
8601 	if (IP_V(ip) == 4) {
8605 		if (ipf_cksum((u_short *)ip, hlen))
8609 	if (ipf_makefrip(hlen, ip, fin) == -1) {
8819 		 " "ip.pr = tcp" first.