tcpproxy.h

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/* TCP Proxy server.
 *
 */

#ifndef _TCPPROXY_H
#define _TCPPROXY_H

#define _REENTRANT       /* Use thread-safe libraries. */
#define MALLOC_CHECK_ 2  /* Abort immediately on malloc error. */ 

#include "libipq.h"
#include <signal.h>

#define DEBUG 1

#define TCP_MAX_CONN 256  /* Maximum number of concurrent TCP connections allowed. */

/*
 * Structures
 */

enum {
  EXIT_ERR_USAGE = 1,
  EXIT_ERR_BAD_MOBILE_IP,
  EXIT_ERR_IPQ_CREATE_HANDLE,
  EXIT_ERR_IPQ_SET_MODE,
  EXIT_ERR_IPQ_READ,
  EXIT_ERR_IPQ_MESSAGE_TYPE,
  EXIT_ERR_IPQ_ERR_MESSAGE,
  EXIT_ERR_MEM_ALLOC,
  EXIT_ERR_MEM_FREE,
  EXIT_ERR_IPQ_DESTROY_HANDLE,
  EXIT_ERR_WRONG_IP_VER,
  EXIT_ERR_CREATE_THREAD,
  EXIT_ERR_PTHREAD_ATTR,
  EXIT_ERR_SIG_MASK,
  EXIT_ERR_SET_SIG_HANDLER,
  EXIT_ERR_QUEUE_EMPTY,
  EXIT_ERR_QUEUE_FULL,
  EXIT_ERR_QUEUE_TYPE,
  EXIT_ERR_SEM_INIT,
  EXIT_ERR_MUTEX,
  EXIT_ERR_SOCKET
};

typedef enum packet_dir
{
    PACKET_DIR_IN = 1,
    PACKET_DIR_OUT
} Tpacket_dir;

typedef struct packet_data
{
    struct ipq_packet_msg ipq_pm;
    unsigned char *payload;
    struct iphdr *ip;
    union {
        struct tcphdr *tcp;
        char *hdr;
    } trans;
    enum packet_dir dir;
} Tpacket_data;

inline Tpacket_data *alloc_packet_data(ipq_packet_msg_t *p);
inline void dealloc_packet_data(Tpacket_data *pd);

extern volatile sig_atomic_t request_exit;
extern pthread_t main_thread;

#endif /* _TCPPROXY_H */

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