intf.h

#ifndef MY_INTF_H
#define MY_INTF_H
//it also combines libdnet's addr.h
#include "base.h"
#include "addr.h"
#include <stdio.h>
/*
 * Interface entry
 */


/*
 * MIB-II interface types - http://www.iana.org/assignments/ianaiftype-mib
 */
#define INTF_TYPE_OTHER   1 /* other */
#define INTF_TYPE_ETH   6 /* Ethernet */
#define INTF_TYPE_TOKENRING 9 /* Token Ring */
#define INTF_TYPE_FDDI    15  /* FDDI */
#define INTF_TYPE_PPP   23  /* Point-to-Point Protocol */
#define INTF_TYPE_LOOPBACK  24  /* software loopback */
#define INTF_TYPE_SLIP    28  /* Serial Line Interface Protocol */
#define INTF_TYPE_TUN   53  /* proprietary virtual/internal */

/*
 * Interface flags
 */
#define INTF_FLAG_UP    0x01  /* enable interface */
#define INTF_FLAG_LOOPBACK  0x02  /* is a loopback net (r/o) */
#define INTF_FLAG_POINTOPOINT 0x04  /* point-to-point link (r/o) */
#define INTF_FLAG_NOARP   0x08  /* disable ARP */
#define INTF_FLAG_BROADCAST 0x10  /* supports broadcast (r/o) */
#define INTF_FLAG_MULTICAST 0x20  /* supports multicast (r/o) */



#define INTF_NAME_LEN 16

struct intf_entry {
  u_int   intf_len;       /* length of entry */
  char    intf_name[INTF_NAME_LEN];   /* interface name */
  u_int   intf_index;       /* interface index (r/o) */
  u_short   intf_type;        /* interface type (r/o) */
  u_short   intf_flags;       /* interface flags */
  u_int   intf_mtu;       /* interface MTU */
  struct addr intf_addr;        /* interface address */
  struct addr intf_dst_addr;        /* point-to-point dst */
  struct addr intf_link_addr;       /* link-layer address */
  u_int   intf_alias_num;       /* number of aliases */
  struct addr intf_alias_addrs __flexarr; /* array of aliases */
};




struct intf_handle {
  int   fd;
  int   fd6;
  struct ifconf ifc;
#ifdef SIOCGLIFCONF
  struct lifconf  lifc;
#endif
  u_char    ifcbuf[4192];
};

typedef struct intf_handle intf_t;

typedef int (*intf_handler)(const struct intf_entry *entry, void *arg);


intf_t  *intf_open(void);
int  intf_get(intf_t *i, struct intf_entry *entry);
int  intf_get_index(intf_t *intf, struct intf_entry *entry, int af, unsigned int index);
int  intf_get_src(intf_t *i, struct intf_entry *entry, struct addr *src);
int  intf_get_dst(intf_t *i, struct intf_entry *entry, struct addr *dst);
int  intf_get_pcap_devname(const char *intf_name, char *pcapdev, int pcapdevlen);
int  intf_set(intf_t *i, const struct intf_entry *entry);
int  intf_loop(intf_t *i, intf_handler callback, void *arg);
intf_t  *intf_close(intf_t *i);



#endif