sys/netinet/ip_icmp.c

62 #include <netinet/ip.h>
192  * in response to bad packet ip.
197 	struct ip *oip, *nip;
220 	if (n->m_len < sizeof(struct ip) + ICMP_MINLEN)
222 	oip = mtod(n, struct ip *);
255 		oip = mtod(n, struct ip *);
281 		oip = mtod(n, struct ip *);
294 			oip = mtod(n, struct ip *);
308 	if (icmplen < sizeof(struct ip))
311 	if (MHLEN > sizeof(struct ip) + ICMP_MINLEN + icmplen)
321 	    sizeof(struct ip) - ICMP_MINLEN);
322 	m_align(m, sizeof(struct ip) + ICMP_MINLEN + icmplen);
323 	m->m_data += sizeof(struct ip);
365 	KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ip),
366 	    ("insufficient space for ip header"));
367 	m->m_data -= sizeof(struct ip);
368 	m->m_len += sizeof(struct ip);
371 	nip = mtod(m, struct ip *);
372 	bcopy((caddr_t)oip, (caddr_t)nip, sizeof(struct ip));
398 	struct ip *ip = mtod(m, struct ip *);
401 	int icmplen = ntohs(ip->ip_len) - *offp;
418 		    inet_ntoa_r(ip->ip_src, srcbuf),
419 		    inet_ntoa_r(ip->ip_dst, dstbuf), icmplen);
433 	ip = mtod(m, struct ip *);
527 		    icp->icmp_ip.ip_hl < (sizeof(struct ip) >> 2)) {
543 		i = sizeof(struct ip) + min(icmplen, ICMP_ADVLENPREF(icp));
551 		ip = mtod(m, struct ip *);
552 		icp = (struct icmp *)(ip + 1);
610 		switch (ip->ip_dst.s_addr) {
614 			icmpdst.sin_addr = ip->ip_src;
618 			icmpdst.sin_addr = ip->ip_dst;
631 		if (ip->ip_src.s_addr == 0) {
633 			    ip->ip_src = satosin(&ia->ia_broadaddr)->sin_addr;
635 			    ip->ip_src = satosin(&ia->ia_dstaddr)->sin_addr;
648 			src = ntohl(ip->ip_src.s_addr);
669 		    icp->icmp_ip.ip_hl < (sizeof(struct ip) >> 2)) {
680 		icmpgw.sin_addr = ip->ip_src;
730  * Reflect the ip packet back to the source
736 	struct ip *ip = mtod(m, struct ip *);
743 	int optlen = (ip->ip_hl << 2) - sizeof(struct ip);
745 	if (IN_MULTICAST(ntohl(ip->ip_src.s_addr)) ||
746 	    IN_EXPERIMENTAL(ntohl(ip->ip_src.s_addr)) ||
747 	    IN_ZERONET(ntohl(ip->ip_src.s_addr)) ) {
753 	t = ip->ip_dst;
754 	ip->ip_dst = ip->ip_src;
835 	if (fib4_lookup_nh_ext(M_GETFIB(m), ip->ip_dst, 0, 0, &nh_ext) != 0) {
845 	ip->ip_src = t;
846 	ip->ip_ttl = V_ip_defttl;
857 		cp = (u_char *) (ip + 1);
918  * Send an icmp packet back to the ip level,
924 	struct ip *ip = mtod(m, struct ip *);
928 	hlen = ip->ip_hl << 2;
933 	icp->icmp_cksum = in_cksum(m, ntohs(ip->ip_len) - hlen);
943 		    inet_ntoa_r(ip->ip_dst, dstbuf),
944 		    inet_ntoa_r(ip->ip_src, srcbuf));