172     struct iphdr ip;  in sendRawUdp()  local
175     ip.version = IPVERSION;  in sendRawUdp()
176     ip.ihl = sizeof(ip) >> 2;  in sendRawUdp()
177     ip.tos = 0;  in sendRawUdp()
178     ip.tot_len = htons(sizeof(ip) + sizeof(udp) + message.size());  in sendRawUdp()
179     ip.id = 0;  in sendRawUdp()
180     ip.frag_off = 0;  in sendRawUdp()
181     ip.ttl = IPDEFTTL;  in sendRawUdp()
182     ip.protocol = IPPROTO_UDP;  in sendRawUdp()
183     ip.check = 0;  in sendRawUdp()
184     ip.saddr = source;  in sendRawUdp()
185     ip.daddr = destination;  in sendRawUdp()
186     ip.check = finishChecksum(addChecksum(ip, 0));  in sendRawUdp()
194     udpChecksum = addChecksum(ip.saddr, udpChecksum);  in sendRawUdp()
195     udpChecksum = addChecksum(ip.daddr, udpChecksum);  in sendRawUdp()
204     iov[0].iov_base = static_cast<void*>(&ip);  in sendRawUdp()
205     iov[0].iov_len = sizeof(ip);  in sendRawUdp()
270     struct iphdr ip;  in receiveRawUdp()  local
274     iov[0].iov_base = &ip;  in receiveRawUdp()
275     iov[0].iov_len = sizeof(ip);  in receiveRawUdp()
285     if (static_cast<size_t>(bytesRead) < sizeof(ip) + sizeof(udp)) {  in receiveRawUdp()
290     *isValid = ip.version == IPVERSION &&  in receiveRawUdp()
291                ip.ihl == (sizeof(ip) >> 2) &&  in receiveRawUdp()
292                ip.protocol == IPPROTO_UDP &&  in receiveRawUdp()
295     message->setSize(bytesRead - sizeof(ip) - sizeof(udp));  in receiveRawUdp()