44 #define CSUM_MANGLED_0 (0xffff)
48 static uint32_t ip_id = 0xabcd;
59 	ret = recv(fd_udp, recv_buff, payload_len, 0);  in recv_validate_udp()
67 				error(1, 0, "recv: expected timeout; got %d",  in recv_validate_udp()
77 		error(1, 0, "recv: wrong size: %d vs %d", (int)ret, payload_len);  in recv_validate_udp()
79 		error(1, 0, "recv: wrong data");  in recv_validate_udp()
86 	for (i = 0; i < (len & ~1U); i += 2) {  in raw_checksum()
88 		if (sum > 0xffff)  in raw_checksum()
89 			sum -= 0xffff;  in raw_checksum()
94 		if (sum > 0xffff)  in raw_checksum()
95 			sum -= 0xffff;  in raw_checksum()
103 	uint32_t sum = 0;  in udp_checksum()
110 	res = 0xffff & ~sum;  in udp_checksum()
119 	uint32_t sum = 0;  in udp6_checksum()
127 	res = 0xffff & ~sum;  in udp6_checksum()
139 	int payload_offset = offset > 0 ? offset - UDP_HLEN : 0;  in send_fragment()
143 	if (offset == 0) {  in send_fragment()
148 		udphdr.check = 0;  in send_fragment()
159 		if (payload_len - payload_offset <= max_frag_len && offset > 0) {  in send_fragment()
168 		if (offset == 0)  in send_fragment()
177 		if (payload_len - payload_offset <= max_frag_len && offset > 0) {  in send_fragment()
186 		if (offset == 0)  in send_fragment()
194 	res = sendto(fd_raw, ip_frame, frag_len, 0, addr, alen);  in send_fragment()
195 	if (res < 0 && errno != EPERM)  in send_fragment()
197 	if (res >= 0 && res != frag_len)  in send_fragment()
198 		error(1, 0, "send_fragment: %d vs %d", res, frag_len);  in send_fragment()
212 	/* Send the UDP datagram using raw IP fragments: the 0th fragment  in send_udp_frags()
217 	 * even fragments (0th, 2nd, etc.) are sent out.  in send_udp_frags()
221 		((struct sockaddr_in6 *)addr)->sin6_port = 0;  in send_udp_frags()
222 		memset(ip6hdr, 0, sizeof(*ip6hdr));  in send_udp_frags()
229 		fraghdr->ip6f_reserved = 0;  in send_udp_frags()
232 		memset(iphdr, 0, sizeof(*iphdr));  in send_udp_frags()
235 		iphdr->ip_tos = 0;  in send_udp_frags()
237 		iphdr->ip_ttl = 0x40;  in send_udp_frags()
241 		iphdr->ip_sum = 0;  in send_udp_frags()
246 		offset = 0;  in send_udp_frags()
267 		offset = 0;  in send_udp_frags()
306 			frag_len &= ~0x7;  in send_udp_frags()
315 		res = sendto(fd_raw, ip_frame, frag_len, 0, addr, alen);  in send_udp_frags()
316 		if (res < 0 && errno != EPERM)  in send_udp_frags()
318 		if (res >= 0 && res != frag_len)  in send_udp_frags()
319 			error(1, 0, "sendto overlap: %d vs %d", (int)res, frag_len);  in send_udp_frags()
324 	offset = 0;  in send_udp_frags()
346 	for (idx = 0; idx < MSG_LEN_MAX; ++idx)  in run_test()
354 	fd_rx_udp = socket(addr->sa_family, SOCK_DGRAM, 0);  in run_test()
411 	struct sockaddr_in addr = {0};  in run_test_v4()
422 	struct sockaddr_in6 addr = {0};  in run_test_v6()
453 			error(1, 0, "%s: parse error", argv[0]);  in parse_opts()
471 	return 0;  in main()