89     struct iphdr ip;  in send_packet()  local
97     ip.version = IPVERSION;  in send_packet()
98     ip.ihl = sizeof(ip) >> 2;  in send_packet()
99     ip.tos = 0;  in send_packet()
100     ip.tot_len = htons(sizeof(ip) + sizeof(udp) + size);  in send_packet()
101     ip.id = 0;  in send_packet()
102     ip.frag_off = 0;  in send_packet()
103     ip.ttl = IPDEFTTL;  in send_packet()
104     ip.protocol = IPPROTO_UDP;  in send_packet()
105     ip.check = 0;  in send_packet()
106     ip.saddr = saddr;  in send_packet()
107     ip.daddr = daddr;  in send_packet()
108     ip.check = finish_sum(checksum(&ip, sizeof(ip), 0));  in send_packet()
116     udpsum = checksum(&ip.saddr, sizeof(ip.saddr), 0);  in send_packet()
117     udpsum = checksum(&ip.daddr, sizeof(ip.daddr), udpsum);  in send_packet()
130     iov[0].iov_base = (char *)&ip;  in send_packet()
131     iov[0].iov_len = sizeof(ip);  in send_packet()
158         struct iphdr ip;  in receive_packet()  member
181     } else if (packet.ip.version != IPVERSION || packet.ip.ihl != (sizeof(packet.ip) >> 2)) {  in receive_packet()
185     } else if (nread < ntohs(packet.ip.tot_len)) {  in receive_packet()
187         ALOGD("Packet was truncated (read %d, needed %d)", nread, ntohs(packet.ip.tot_len));  in receive_packet()
189     } else if (packet.ip.protocol != IPPROTO_UDP) {  in receive_packet()
191         ALOGD("IP protocol (%d) is not UDP", packet.ip.protocol);  in receive_packet()
207     sum = finish_sum(checksum(&packet.ip, sizeof(packet.ip), 0));  in receive_packet()
209         ALOGW("IP header checksum failure (0x%x)", packet.ip.check);  in receive_packet()
232     saddr = packet.ip.saddr;  in receive_packet()
233     daddr = packet.ip.daddr;  in receive_packet()
234     nread = ntohs(packet.ip.tot_len);  in receive_packet()
235     memset(&packet.ip, 0, sizeof(packet.ip));  in receive_packet()
236     packet.ip.saddr = saddr;  in receive_packet()
237     packet.ip.daddr = daddr;  in receive_packet()
238     packet.ip.protocol = IPPROTO_UDP;  in receive_packet()
239     packet.ip.tot_len = packet.udp.len;  in receive_packet()