#ifndef _PACKET_H #define _PACKET_H #include <netinet/udp.h> #include <netinet/ip.h> struct dhcpMessage { u_int8_t op; u_int8_t htype; u_int8_t hlen; u_int8_t hops; u_int32_t xid; u_int16_t secs; u_int16_t flags; u_int32_t ciaddr; u_int32_t yiaddr; u_int32_t siaddr; u_int32_t giaddr; u_int8_t chaddr[16]; u_int8_t sname[64]; u_int8_t file[128]; u_int32_t cookie; u_int8_t options[308]; /* 312 - cookie */ }; struct udp_dhcp_packet { struct iphdr ip; struct udphdr udp; struct dhcpMessage data; }; void init_header(struct dhcpMessage *packet, char type); int get_packet(struct dhcpMessage *packet, int fd); u_int16_t checksum(void *addr, int count); int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port, u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex); int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port, u_int32_t dest_ip, int dest_port); #endif