81 send_ip(int nfd, int mtu, ip_t *ip, struct in_addr gwip, int frag)  in send_ip()  argument
116 	bcopy((char *)ip, (char *)&ipsv, sizeof(*ip));  in send_ip()
118 	iplen = ip->ip_len;  in send_ip()
119 	ip->ip_len = htons(iplen);  in send_ip()
121 		if (!IP_V(ip))  in send_ip()
122 			IP_V_A(ip, IPVERSION);  in send_ip()
123 		if (!ip->ip_id)  in send_ip()
124 			ip->ip_id  = htons(id++);  in send_ip()
125 		if (!ip->ip_ttl)  in send_ip()
126 			ip->ip_ttl = 60;  in send_ip()
129 	if (ip->ip_src.s_addr != local_ip.s_addr) {  in send_ip()
130 		(void) arp((char *)&ip->ip_src, (char *) &local_arp);  in send_ip()
132 		local_ip = ip->ip_src;  in send_ip()
138 		ip->ip_sum = 0;  in send_ip()
139 		ip->ip_sum = chksum((u_short *)ip, IP_HL(ip) << 2);  in send_ip()
141 		bcopy((char *)ip, ipbuf + sizeof(*eh), iplen);  in send_ip()
156 		hlen = IP_HL(ip) << 2;  in send_ip()
163 		ol = (IP_HL(ip) << 2) - sizeof(*ip);  in send_ip()
164 		for (i = 0, s = (char*)(ip + 1); ol > 0; )  in send_ip()
194 		s = (char *)ip + hlen;  in send_ip()
195 		iplen = ntohs(ip->ip_len) - hlen;  in send_ip()
196 		ip->ip_off |= htons(IP_MF);  in send_ip()
202 				ip->ip_off ^= htons(IP_MF);  in send_ip()
207 			ip->ip_off &= htons(0xe000);  in send_ip()
208 			ip->ip_off |= htons(sent >> 3);  in send_ip()
210 			ip->ip_len = htons(ts);  in send_ip()
211 			ip->ip_sum = 0;  in send_ip()
212 			ip->ip_sum = chksum((u_short *)ip, hlen);  in send_ip()
213 			bcopy((char *)ip, ipbuf + sizeof(*eh), hlen);  in send_ip()
219 			if (!(ntohs(ip->ip_off) & IP_MF))  in send_ip()
221 			else if (!(ip->ip_off & htons(0x1fff)))  in send_ip()
223 				hlen = i + sizeof(*ip);  in send_ip()
224 				IP_HL_A(ip, (sizeof(*ip) + i) >> 2);  in send_ip()
225 				bcopy(optcpy, (char *)(ip + 1), i);  in send_ip()
230 	bcopy((char *)&ipsv, (char *)ip, sizeof(*ip));  in send_ip()
239 send_tcp(int nfd, int mtu, ip_t *ip, struct in_addr gwip)  in send_tcp()  argument
247 	iplen = ip->ip_len;  in send_tcp()
248 	hlen = IP_HL(ip) << 2;  in send_tcp()
249 	t = (tcphdr_t *)((char *)ip + hlen);  in send_tcp()
250 	ip2 = (struct ip *)lbuf;  in send_tcp()
256 	ip->ip_p = IPPROTO_TCP;  in send_tcp()
257 	ip2->ip_p = ip->ip_p;  in send_tcp()
258 	ip2->ip_src = ip->ip_src;  in send_tcp()
259 	ip2->ip_dst = ip->ip_dst;  in send_tcp()
260 	bcopy((char *)ip + hlen, (char *)t2, thlen);  in send_tcp()
268 	if ((t2->th_flags == TH_SYN) && !ntohs(ip->ip_off) &&  in send_tcp()
271 		bcopy((char *)ip + hlen + thlen, (char *)ip + hlen + thlen + 4,  in send_tcp()
277 	ip->ip_len = hlen + thlen;  in send_tcp()
281 	bcopy((char *)t2, (char *)ip + hlen, thlen);  in send_tcp()
282 	return (send_ip(nfd, mtu, ip, gwip, 1));  in send_tcp()
290 send_udp(int nfd, int mtu, ip_t *ip, struct in_addr gwip)  in send_udp()  argument
299 	ti->ti_pr = ip->ip_p;  in send_udp()
300 	ti->ti_src = ip->ip_src;  in send_udp()
301 	ti->ti_dst = ip->ip_dst;  in send_udp()
302 	bcopy((char *)ip + (IP_HL(ip) << 2),  in send_udp()
306 	ip->ip_len = (IP_HL(ip) << 2) + thlen;  in send_udp()
311 	      (char *)ip + (IP_HL(ip) << 2), sizeof(udphdr_t));  in send_udp()
312 	return (send_ip(nfd, mtu, ip, gwip, 1));  in send_udp()
320 send_icmp(int nfd, int mtu, ip_t *ip, in_addr gwip)  in send_icmp()  argument
324 	ic = (struct icmp *)((char *)ip + (IP_HL(ip) << 2));  in send_icmp()
329 	return (send_ip(nfd, mtu, ip, gwip, 1));  in send_icmp()
334 send_packet(int nfd, int mtu, ip_t *ip, struct in_addr gwip)
336 	ip_t	*ip;  variable
339 	switch (ip->ip_p)
342 (                return send_tcp(nfd, mtu, ip, gwip));
344 (                return send_udp(nfd, mtu, ip, gwip));
346 (                return send_icmp(nfd, mtu, ip, gwip));
348 (                return send_ip(nfd, mtu, ip, gwip, 1));