sys/netinet6/ip6_input.c

177 	/* ip6_hbhchcheck() may be run before, then off and nxt are set */
228 		int off, nxt;
239 			off = ion->ion_off;
247 			off = sizeof(struct ip6_hdr);
250 		nxt = ip_deliver(&m, &off, nxt, AF_INET6, 0);
258 	int off, nxt;
260 	off = 0;
261 	nxt = ip6_input_if(&m, &off, IPPROTO_IPV6, AF_UNSPEC, ifp);
729 	int done = 0, lim, off, rh_cnt = 0;
731 	off = ((caddr_t)ip6 - m->m_data) + sizeof(struct ip6_hdr);
738 				*offp = off;
742 			if (off + sizeof(rthdr) > lim) {
744 				*offp = off;
748 			m_copydata(m, off, sizeof(rthdr), &rthdr);
751 				*offp = off +
756 			off += (rthdr.ip6r_len + 1) * 8;
763 			if (off + sizeof(opt6) > lim) {
772 			m_copydata(m, off, sizeof(opt6), &opt6);
775 				off += (opt6.ip6e_len + 2) * 4;
777 				off += (opt6.ip6e_len + 1) * 8;
802 	int off = *offp, hbhlen;
819 	off += hbhlen;
826 	*offp = off;
970  * The third argument `off' is the offset from the IPv6 header to the option,
976 ip6_unknown_opt(struct mbuf **mp, u_int8_t *optp, int off)
988 		icmp6_error(*mp, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
998 				    ICMP6_PARAMPROB_OPTION, off);
1122 		int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1150 			ext = ip6_pullexthdr(m, off, nxt);
1206 			off += elen;
1222 ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
1240 	if (off + sizeof(ip6e) > m->m_pkthdr.len)
1243 	m_copydata(m, off, sizeof(ip6e), &ip6e);
1249 	if (off + elen > m->m_pkthdr.len)
1271 	m_copydata(m, off, elen, mtod(n, caddr_t));
1281 ip6_get_prevhdr(struct mbuf *m, int off)
1285 	if (off == sizeof(struct ip6_hdr)) {
1287 	} else if (off < sizeof(struct ip6_hdr)) {
1288 		panic("%s: off < sizeof(struct ip6_hdr)", __func__);
1296 		while (len < off) {
1322 ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
1331 	if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1336 		if (m->m_pkthdr.len < off + sizeof(ip6))
1338 		m_copydata(m, off, sizeof(ip6), &ip6);
1341 		off += sizeof(ip6);
1342 		return off;
1349 		if (m->m_pkthdr.len < off + sizeof(fh))
1351 		m_copydata(m, off, sizeof(fh), &fh);
1356 		off += sizeof(struct ip6_frag);
1357 		return off;
1360 		if (m->m_pkthdr.len < off + sizeof(ip6e))
1362 		m_copydata(m, off, sizeof(ip6e), &ip6e);
1365 		off += (ip6e.ip6e_len + 2) << 2;
1366 		if (m->m_pkthdr.len < off)
1368 		return off;
1373 		if (m->m_pkthdr.len < off + sizeof(ip6e))
1375 		m_copydata(m, off, sizeof(ip6e), &ip6e);
1378 		off += (ip6e.ip6e_len + 1) << 3;
1379 		if (m->m_pkthdr.len < off)
1381 		return off;
1400 ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
1410 		newoff = ip6_nexthdr(m, off, proto, nxtp);
1412 			return off;
1413 		else if (newoff < off)
1415 		else if (newoff == off)
1418 		off = newoff;