62 	struct ip	*ipq_hdr;
78 	struct ip	*ip_hdr;
89 	struct ip *ip;  in sendip()  local
104 	ip = (struct ip *)pkt - 1;  in sendip()
105 	len += sizeof(*ip);  in sendip()
107 	bzero(ip, sizeof(*ip));  in sendip()
109 	ip->ip_v = IPVERSION;			/* half-char */  in sendip()
110 	ip->ip_hl = sizeof(*ip) >> 2;		/* half-char */  in sendip()
111 	ip->ip_len = htons(len);  in sendip()
112 	ip->ip_p = proto;			/* char */  in sendip()
113 	ip->ip_ttl = IPDEFTTL;			/* char */  in sendip()
114 	ip->ip_src = d->myip;  in sendip()
115 	ip->ip_dst = d->destip;  in sendip()
116 	ip->ip_sum = in_cksum(ip, sizeof(*ip));	 /* short, but special */  in sendip()
118 	if (ip->ip_dst.s_addr == INADDR_BROADCAST || ip->ip_src.s_addr == 0 ||  in sendip()
119 	    netmask == 0 || SAMENET(ip->ip_src, ip->ip_dst, netmask))  in sendip()
120 		ea = arpwhohas(d, ip->ip_dst);  in sendip()
124 	cc = sendether(d, ip, len, ea, ETHERTYPE_IP);  in sendip()
129 	return (cc - sizeof(*ip));  in sendip()
147 ip_reasm_add(struct ip_reasm *ipr, void *pkt, struct ip *ip)  in ip_reasm_add()  argument
155 	ipq->ipq_hdr = ip;  in ip_reasm_add()
160 		    (ntohs(ip->ip_off) & IP_OFFMASK)) {  in ip_reasm_add()
184 	struct ip *ip;  in readipv4()  local
196 	ip = NULL;  in readipv4()
198 	n = readether(d, (void **)&ptr, (void **)&ip, tleft, &etype);  in readipv4()
199 	if (n == -1 || n < sizeof(*ip) + sizeof(*uh)) {  in readipv4()
208 		struct arphdr *ah = (void *)ip;  in readipv4()
228 	if (ip->ip_v != IPVERSION ||	/* half char */  in readipv4()
229 	    ip->ip_p != proto) {  in readipv4()
233 			    ip->ip_v, ip->ip_p);  in readipv4()
240 	hlen = ip->ip_hl << 2;  in readipv4()
241 	if (hlen < sizeof(*ip) ||  in readipv4()
242 	    in_cksum(ip, hlen) != 0) {  in readipv4()
250 	if (n < ntohs(ip->ip_len)) {  in readipv4()
254 			       (int)n, ntohs(ip->ip_len));  in readipv4()
259 	if (d->myip.s_addr && ip->ip_dst.s_addr != d->myip.s_addr) {  in readipv4()
263 			printf("%s\n", inet_ntoa(ip->ip_dst));  in readipv4()
271 	if ((ntohs(ip->ip_off) & IP_MF) == 0 &&  in readipv4()
272 	    (ntohs(ip->ip_off) & IP_OFFMASK) == 0) {  in readipv4()
273 		uh = (struct udphdr *)((uintptr_t)ip + sizeof (*ip));  in readipv4()
275 		if (hlen != sizeof(*ip)) {  in readipv4()
276 			bcopy(((u_char *)ip) + hlen, uh, uh->uh_ulen - hlen);  in readipv4()
277 			ip->ip_len = htons(sizeof(*ip));  in readipv4()
278 			n -= hlen - sizeof(*ip);  in readipv4()
281 		n = (n > (ntohs(ip->ip_len) - sizeof(*ip))) ?  in readipv4()
282 		    ntohs(ip->ip_len) - sizeof(*ip) : n;  in readipv4()
284 		*payload = (void *)((uintptr_t)ip + sizeof(*ip));  in readipv4()
289 		if (ipr->ip_src.s_addr == ip->ip_src.s_addr &&  in readipv4()
290 		    ipr->ip_dst.s_addr == ip->ip_dst.s_addr &&  in readipv4()
291 		    ipr->ip_id == ip->ip_id &&  in readipv4()
292 		    ipr->ip_proto == ip->ip_p)  in readipv4()
303 		ipr->ip_src = ip->ip_src;  in readipv4()
304 		ipr->ip_dst = ip->ip_dst;  in readipv4()
305 		ipr->ip_id = ip->ip_id;  in readipv4()
306 		ipr->ip_proto = ip->ip_p;  in readipv4()
312 	if (ip_reasm_add(ipr, ptr, ip) != 0) {  in readipv4()
319 	if ((ntohs(ip->ip_off) & IP_MF) == 0) {  in readipv4()
320 		ipr->ip_total_size = (8 * (ntohs(ip->ip_off) & IP_OFFMASK));  in readipv4()
321 		ipr->ip_total_size += n + sizeof (*ip);  in readipv4()
368 	ipr->ip_hdr = (struct ip *)((uintptr_t)eh + sizeof (*eh));  in readipv4()