return ~sum;
}
-void dhcp_packet_append_ip_headers(DHCPPacket *packet, uint16_t len) {
+void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr,
+ uint16_t source_port, be32_t destination_addr,
+ uint16_t destination_port, uint16_t len) {
packet->ip.version = IPVERSION;
packet->ip.ihl = DHCP_IP_SIZE / 4;
packet->ip.tot_len = htobe16(len);
packet->ip.protocol = IPPROTO_UDP;
- packet->ip.saddr = INADDR_ANY;
- packet->ip.daddr = INADDR_BROADCAST;
+ packet->ip.saddr = source_addr;
+ packet->ip.daddr = destination_addr;
- packet->udp.source = htobe16(DHCP_PORT_CLIENT);
- packet->udp.dest = htobe16(DHCP_PORT_SERVER);
+ packet->udp.source = htobe16(source_port);
+ packet->udp.dest = htobe16(destination_port);
packet->udp.len = htobe16(len - DHCP_IP_SIZE);