1#ifndef _PACKET_H
2#define _PACKET_H
3
4#include <netinet/udp.h>
5#include <netinet/ip.h>
6
7struct dhcpMessage {
8	u_int8_t op;
9	u_int8_t htype;
10	u_int8_t hlen;
11	u_int8_t hops;
12	u_int32_t xid;
13	u_int16_t secs;
14	u_int16_t flags;
15	u_int32_t ciaddr;
16	u_int32_t yiaddr;
17	u_int32_t siaddr;
18	u_int32_t giaddr;
19	u_int8_t chaddr[16];
20	u_int8_t sname[64];
21	u_int8_t file[128];
22	u_int32_t cookie;
23	u_int8_t options[308]; /* 312 - cookie */
24};
25
26struct udp_dhcp_packet {
27	struct iphdr ip;
28	struct udphdr udp;
29	struct dhcpMessage data;
30};
31
32void init_header(struct dhcpMessage *packet, char type);
33int get_packet(struct dhcpMessage *packet, int fd);
34u_int16_t checksum(void *addr, int count);
35int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
36		   u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex);
37int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
38		   u_int32_t dest_ip, int dest_port);
39
40
41#endif
42