bsd/netinet6/ip6_input.c

475 	int off = sizeof(struct ip6_hdr), nest;
947 		if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
1131 		if (m->m_pkthdr.len < off) {
1168 						(mbuf_t *)&m, off, nxt);
1192 			nxt = pr_input(&m, &off, nxt);
1195 			nxt = pr_input(&m, &off, nxt);
1251 	int off = *offp, hbhlen;
1257 	IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), return -1);
1258 	hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
1261 	IP6_EXTHDR_CHECK(m, off, hbhlen, return -1);
1262 	hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
1278 	off += hbhlen;
1286 	*offp = off;
1435  * The third argument `off' is the offset from the IPv6 header to the option,
1440 ip6_unknown_opt(uint8_t *optp, struct mbuf *m, int off)
1452 		icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1462 				    ICMP6_PARAMPROB_OPTION, off);
1650 		int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1681 			if (off + sizeof(*ip6e) > m->m_len)
1683 			ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off);
1688 			if (off + elen > m->m_len)
1691 			ext = ip6_pullexthdr(m, off, nxt);
1757 			off += elen;
1819 ip6_pullexthdr(m, off, nxt)
1821 	size_t off;
1840 	m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1863 	m_copydata(m, off, elen, mtod(n, caddr_t));
1882 ip6_get_prevhdr(m, off)
1884 	int off;
1888 	if (off == sizeof(struct ip6_hdr))
1896 		while (len < off) {
1923 ip6_nexthdr(m, off, proto, nxtp)
1925 	int off;
1936 	if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
1941 		if (m->m_pkthdr.len < off + sizeof(ip6))
1943 		m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
1946 		off += sizeof(ip6);
1947 		return off;
1954 		if (m->m_pkthdr.len < off + sizeof(fh))
1956 		m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
1962 		off += sizeof(struct ip6_frag);
1963 		return off;
1966 		if (m->m_pkthdr.len < off + sizeof(ip6e))
1968 		m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1971 		off += (ip6e.ip6e_len + 2) << 2;
1972 		return off;
1977 		if (m->m_pkthdr.len < off + sizeof(ip6e))
1979 		m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
1982 		off += (ip6e.ip6e_len + 1) << 3;
1983 		return off;
2002 ip6_lasthdr(m, off, proto, nxtp)
2004 	int off;
2016 		newoff = ip6_nexthdr(m, off, proto, nxtp);
2018 			return off;
2019 		else if (newoff < off)
2021 		else if (newoff == off)
2024 		off = newoff;