161     } packet;  in receive_packet()  local
167     nread = read(s, &packet, sizeof(packet));  in receive_packet()
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()
193     } else if (packet.udp.dest != htons(PORT_BOOTP_CLIENT)) {  in receive_packet()
195         ALOGD("UDP dest port (%d) is not DHCP client", ntohs(packet.udp.dest));  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()
217     dhcp_size = ntohs(packet.udp.len) - sizeof(packet.udp);  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()
240     temp = packet.udp.check;  in receive_packet()
241     packet.udp.check = 0;  in receive_packet()
242     sum = finish_sum(checksum(&packet, nread, 0));  in receive_packet()
243     packet.udp.check = temp;  in receive_packet()
250     memcpy(msg, &packet.dhcp, dhcp_size);  in receive_packet()