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42 lines
940 B
C
42 lines
940 B
C
#ifndef _PACKET_H
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#define _PACKET_H
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#include <netinet/udp.h>
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#include <netinet/ip.h>
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struct dhcpMessage {
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uint8_t op;
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uint8_t htype;
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uint8_t hlen;
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uint8_t hops;
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uint32_t xid;
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uint16_t secs;
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uint16_t flags;
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uint32_t ciaddr;
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uint32_t yiaddr;
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uint32_t siaddr;
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uint32_t giaddr;
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uint8_t chaddr[16];
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uint8_t sname[64];
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uint8_t file[128];
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uint32_t cookie;
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uint8_t options[308]; /* 312 - cookie */
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};
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struct udp_dhcp_packet {
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struct iphdr ip;
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struct udphdr udp;
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struct dhcpMessage data;
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};
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void init_header(struct dhcpMessage *packet, char type);
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int get_packet(struct dhcpMessage *packet, int fd);
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uint16_t checksum(void *addr, int count);
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int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
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uint32_t dest_ip, int dest_port, uint8_t *dest_arp, int ifindex);
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int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
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uint32_t dest_ip, int dest_port);
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#endif
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