573 static uint16_t checksum_ip(const void *header, size_t headersize) {  in checksum_ip()  argument
574 	const uint16_t *p = header;  in checksum_ip()
606 	struct header_ip header = {  in send_packet_ip_base()  local
629 	if (ipsettings & si_opt_badpad) memset(header.opt, -1, sizeof(header.opt));  in send_packet_ip_base()
630 	if (ipsettings & si_opt_nop) header.opt[optlen++] = 0x01;  in send_packet_ip_base()
632 		header.opt[optlen++] = 0x82;  in send_packet_ip_base()
633 		header.opt[optlen++] = 0x0b;  in send_packet_ip_base()
634 		header.opt[optlen++] = 0x6b; /* S: top secret */  in send_packet_ip_base()
635 		header.opt[optlen++] = 0xc5; /* S: top secret */  in send_packet_ip_base()
636 		header.opt[optlen++] = 0x00; /* C */  in send_packet_ip_base()
637 		header.opt[optlen++] = 0x00; /* C */  in send_packet_ip_base()
638 		header.opt[optlen++] = 'A'; /* H */  in send_packet_ip_base()
639 		header.opt[optlen++] = 'B'; /* H */  in send_packet_ip_base()
640 		header.opt[optlen++] = 'C'; /* TCC */  in send_packet_ip_base()
641 		header.opt[optlen++] = 'D'; /* TCC */  in send_packet_ip_base()
642 		header.opt[optlen++] = 'E'; /* TCC */  in send_packet_ip_base()
644 	if (ipsettings & si_opt_badopt) header.opt[optlen++] = 0xff;  in send_packet_ip_base()
645 	if (ipsettings & si_opt_end) header.opt[optlen++] = 0x00;  in send_packet_ip_base()
646 	assert(optlen <= sizeof(header.opt));  in send_packet_ip_base()
651 	header.ver_ihl = (ver << 4) | ihl_fuzzed;  in send_packet_ip_base()
657 	header.len = len; /* no htons(), lwip swaps this */  in send_packet_ip_base()
665 	header.cs = checksum_ip(&header, ihl * 4);  in send_packet_ip_base()
666 	if (ipsettings & si_zero_cs) header.cs = 0;  in send_packet_ip_base()
667 	if (ipsettings & si_bad_cs) header.cs += 1;  in send_packet_ip_base()
670 	memcpy(packet, &header, ihl * 4);  in send_packet_ip_base()
791 	struct header_udp_pseudo header = {  in checksum_udp()  local
799 	sum = checksum_udp_sum(&header, sizeof(header)) +  in checksum_udp()
821 	struct header_udp header = {  in send_packet_udp()  local
836 	header.len = htons(len);  in send_packet_udp()
838 	packetsize = sizeof(header) + payloadsize;  in send_packet_udp()
841 	memcpy(packet, &header, sizeof(header));  in send_packet_udp()
842 	memcpy(packet + sizeof(header), payload, payloadsize);  in send_packet_udp()
845 	header.cs = checksum_udp(srcip, dstip, prot, packet, packetsize);  in send_packet_udp()
846 	if (udpsettings & su_zero_cs) header.cs = 0;  in send_packet_udp()
847 	if (udpsettings & su_bad_cs) header.cs += 1;  in send_packet_udp()
849 	memcpy(packet, &header, sizeof(header));  in send_packet_udp()
1114 	struct header_tcp header = {  in send_packet_tcp()  local
1138 	if (tcpsettings & st_opt_badpad) memset(header.opt, -1, sizeof(header.opt));  in send_packet_tcp()
1139 	if (tcpsettings & st_opt_nop) header.opt[optlen++] = 0x01;  in send_packet_tcp()
1141 		header.opt[optlen++] = 0x02;  in send_packet_tcp()
1142 		header.opt[optlen++] = 0x04;  in send_packet_tcp()
1143 		header.opt[optlen++] = 0x00;  in send_packet_tcp()
1144 		header.opt[optlen++] = 0x00;  in send_packet_tcp()
1147 		header.opt[optlen++] = 0x02;  in send_packet_tcp()
1148 		header.opt[optlen++] = 0x04;  in send_packet_tcp()
1149 		header.opt[optlen++] = 0x10;  in send_packet_tcp()
1150 		header.opt[optlen++] = 0x00;  in send_packet_tcp()
1153 		header.opt[optlen++] = 0x02;  in send_packet_tcp()
1154 		header.opt[optlen++] = 0x04;  in send_packet_tcp()
1155 		header.opt[optlen++] = 0xff;  in send_packet_tcp()
1156 		header.opt[optlen++] = 0xff;  in send_packet_tcp()
1158 	if (tcpsettings & st_opt_end) header.opt[optlen++] = 0x00;  in send_packet_tcp()
1164 	header.doff = doff_fuzzed << 4;  in send_packet_tcp()
1169 	memcpy(packet, &header, sizeof(header));  in send_packet_tcp()
1170 	memcpy(packet + sizeof(header), payload, payloadsize);  in send_packet_tcp()
1173 	header.cs = checksum_udp(srcip, dstip, prot, packet, packetsize);  in send_packet_tcp()
1174 	if (tcpsettings & su_zero_cs) header.cs = 0;  in send_packet_tcp()
1175 	if (tcpsettings & su_bad_cs) header.cs += 1;  in send_packet_tcp()
1177 	memcpy(packet, &header, sizeof(header));  in send_packet_tcp()