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#ifndef __DHCPV4_H
#define __DHCPV4_H
#include <stdint.h>
#include <pthread.h>
#include <endian.h>
#include "list.h"
#include "triton.h"
#define __packed __attribute__((packed))
#define DHCP_SERV_PORT 67
#define DHCP_CLIENT_PORT 68
#define DHCP_MAGIC "\x63\x82\x53\x63"
#define DHCP_OP_REQUEST 1
#define DHCP_OP_REPLY 2
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define DHCP_F_BROADCAST 0x0080
#else
#define DHCP_F_BROADCAST 0x8000
#endif
#define DHCPDISCOVER 1
#define DHCPOFFER 2
#define DHCPREQUEST 3
#define DHCPDECLINE 4
#define DHCPACK 5
#define DHCPNAK 6
#define DHCPRELEASE 7
#define DHCPINFORM 8
struct dhcpv4_hdr {
uint8_t op;
uint8_t htype;
uint8_t hlen;
uint8_t hops;
uint32_t xid;
uint16_t sec;
uint16_t flags;
uint32_t ciaddr;
uint32_t yiaddr;
uint32_t siaddr;
uint32_t giaddr;
uint8_t chaddr[16];
char sname[64];
char file[128];
uint8_t magic[4];
} __packed;
struct dhcpv4_option {
struct list_head entry;
uint8_t type;
uint8_t len;
uint8_t *data;
};
struct dhcpv4_packet {
struct dhcpv4_hdr *hdr;
struct list_head options;
struct dhcpv4_option *client_id;
struct dhcpv4_option *relay_agent;
uint32_t request_ip;
uint32_t server_id;
int msg_type;
in_addr_t src_addr;
int volatile refs;
uint8_t *ptr;
uint8_t data[0];
};
struct dhcpv4_iprange {
struct list_head entry;
uint32_t routerip;
uint32_t startip;
int mask;
int pos;
int len;
pthread_mutex_t lock;
unsigned long free[0];
};
struct dhcpv4_serv {
struct triton_context_t *ctx;
struct triton_md_handler_t hnd;
uint8_t hwaddr[6];
int ifindex;
void (*recv)(struct dhcpv4_serv *serv, struct dhcpv4_packet *pack);
struct dhcpv4_iprange *range;
};
struct dhcpv4_relay {
struct list_head entry;
struct triton_context_t ctx;
struct triton_md_handler_t hnd;
struct list_head ctx_list;
in_addr_t addr;
in_addr_t giaddr;
};
struct ap_session;
struct dhcpv4_serv *dhcpv4_create(struct triton_context_t *ctx, const char *ifname, const char *opt);
void dhcpv4_free(struct dhcpv4_serv *);
struct dhcpv4_relay *dhcpv4_relay_create(const char *addr, in_addr_t giaddr, struct triton_context_t *ctx, triton_event_func recv);
void dhcpv4_relay_free(struct dhcpv4_relay *, struct triton_context_t *);
int dhcpv4_relay_send(struct dhcpv4_relay *relay, struct dhcpv4_packet *request, uint32_t server_id,
const char *agent_circuit_id, const char *agent_remote_id);
int dhcpv4_relay_send_release(struct dhcpv4_relay *relay, uint8_t *chaddr, uint32_t xid, uint32_t ciaddr,
struct dhcpv4_option *client_id, struct dhcpv4_option *relay_agent,
const char *agent_circuit_id, const char *agent_remote_id);
int dhcpv4_send_reply(int msg_type, struct dhcpv4_serv *serv, struct dhcpv4_packet *req, uint32_t yiaddr, uint32_t siaddr, uint32_t router, uint32_t mask, int lease_time, struct dhcpv4_packet *relay_reply);
int dhcpv4_send_nak(struct dhcpv4_serv *serv, struct dhcpv4_packet *req);
void dhcpv4_packet_ref(struct dhcpv4_packet *pack);
struct dhcpv4_option *dhcpv4_packet_find_opt(struct dhcpv4_packet *pack, int type);
int dhcpv4_packet_insert_opt82(struct dhcpv4_packet *pack, const char *agent_circuit_id, const char *agent_remote_id);
void dhcpv4_packet_free(struct dhcpv4_packet *pack);
int dhcpv4_check_options(struct dhcpv4_packet *);
void dhcpv4_print_options(struct dhcpv4_packet *, void (*)(const char *, ...));
void dhcpv4_print_packet(struct dhcpv4_packet *pack, int relay, void (*print)(const char *fmt, ...));
int dhcpv4_parse_opt82(struct dhcpv4_option *opt, uint8_t **agent_circuit_id, uint8_t **agent_remote_id);
int dhcpv4_get_ip(struct dhcpv4_serv *serv, uint32_t *yiaddr, uint32_t *siaddr, int *mask);
void dhcpv4_put_ip(struct dhcpv4_serv *serv, uint32_t ip);
void dhcpv4_reserve_ip(struct dhcpv4_serv *serv, uint32_t ip);
#endif
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