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#ifndef PPKT_H
#define PPKT_H 1
#include <netinet/ip_icmp.h>
#include <stdint.h>
#include <sys/socket.h>
#define PTUNNEL_MAGIC 0xdeadc0de
#define PTUNNAL_MAX_BODY_SIZE (1500 - sizeof(struct iphdr) \
- sizeof(struct icmphdr) \
- sizeof(struct ppkt_header))
enum ptype {
PTYPE_INVALID = 0,
PTYPE_AUTH_REQUEST,
PTYPE_AUTH_RESPONSE,
};
struct psock;
struct pdesc;
struct ppkt_auth_request {
uint32_t magic;
uint16_t authdata_siz;
uint8_t authdata[0];
} __attribute__((__packed__));
struct ppkt_auth_response {
uint8_t code;
} __attribute__((__packed__));
struct ppkt_header {
uint16_t total_size;
uint8_t type;
} __attribute__((__packed__));
union ppkt_body {
struct ppkt_auth_request auth_request;
struct ppkt_auth_response auth_response;
uint8_t buf[PTUNNAL_MAX_BODY_SIZE];
} __attribute__((__packed__));
struct ppkt_buffer {
struct iovec iovec[4];
size_t iovec_used;
struct icmphdr icmphdr;
struct ppkt_header pheader;
union ppkt_body pbody;
};
enum ptype ppkt_type_to_enum(struct ppkt_header *);
int ppkt_process_icmp(struct psock *);
int ppkt_process_ppkt(struct psock *);
void ppkt_prepare_auth_request(struct pdesc *, struct ppkt_buffer *, uint8_t *, size_t);
#endif
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