743 	struct mbuf *m0;  in read_dsfield()  local
751 	for (m0 = m; m0 != NULL; m0 = m0->m_next)  in read_dsfield()
752 		if ((pktattr->pattr_hdr >= m0->m_data) &&  in read_dsfield()
753 		    (pktattr->pattr_hdr < m0->m_data + m0->m_len))  in read_dsfield()
755 	if (m0 == NULL) {  in read_dsfield()
788 	struct mbuf *m0;  in write_dsfield()  local
795 	for (m0 = m; m0 != NULL; m0 = m0->m_next)  in write_dsfield()
796 		if ((pktattr->pattr_hdr >= m0->m_data) &&  in write_dsfield()
797 		    (pktattr->pattr_hdr < m0->m_data + m0->m_len))  in write_dsfield()
799 	if (m0 == NULL) {  in write_dsfield()
1119 	struct mbuf *m0;  local
1136 	for (m0 = m; m0 != NULL; m0 = m0->m_next)
1137 		if (((caddr_t)ip >= m0->m_data) &&
1138 		    ((caddr_t)ip < m0->m_data + m0->m_len))
1140 	if (m0 == NULL) {
1146 	off = ((caddr_t)ip - m0->m_data) + (ip->ip_hl << 2);
1152 	while (off >= m0->m_len) {
1153 		off -= m0->m_len;
1154 		m0 = m0->m_next;
1155 		if (m0 == NULL)
1158 	if (m0->m_len < off + 4)
1166 		udp = (struct udphdr *)(mtod(m0, caddr_t) + off);
1178 			gpi = (u_int32_t *)(mtod(m0, caddr_t) + off);
1188 			opt6 = (struct _opt6 *)(mtod(m0, caddr_t) + off);
1191 			if (fin->fi_gpi == 0 && m0->m_len >= off + 8)
1217 	struct mbuf *m0;  local
1226 	for (m0 = m; m0 != NULL; m0 = m0->m_next)
1227 		if (((caddr_t)ip6 >= m0->m_data) &&
1228 		    ((caddr_t)ip6 < m0->m_data + m0->m_len))
1230 	if (m0 == NULL) {
1236 	off = ((caddr_t)ip6 - m0->m_data) + sizeof(struct ip6_hdr);
1240 		while (off >= m0->m_len) {
1241 			off -= m0->m_len;
1242 			m0 = m0->m_next;
1243 			if (m0 == NULL)
1246 		if (m0->m_len < off + 4)
1254 			udp = (struct udphdr *)(mtod(m0, caddr_t) + off);
1265 				gpi = (u_int32_t *)(mtod(m0, caddr_t) + off);
1275 			opt6 = (struct _opt6 *)(mtod(m0, caddr_t) + off);
1276 			if (fin6->fi6_gpi == 0 && m0->m_len >= off + 8)
1290 			opt6 = (struct _opt6 *)(mtod(m0, caddr_t) + off);