socketIO.c File Reference

#include <linux/if_packet.h>
#include <linux/if_ether.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "socketIO.h"

Functions
int	rst_open (char *i, int mode)
	Open a raw socket.
int	rst_send (int fd, unsigned char *buf, int len)
	Send a raw ethernet frame.
int	rst_receive (int fd, unsigned char *buf, int t)
	Receive next frame.
void	rst_close (int fd)
	Close a raw socket.

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Function Documentation

void rst_close (  int  fd  )

Close a raw socket. Parameters: fd  file descriptor Precondition: fd is an open file descriptor returned by rst_open Postcondition: the socket is closed; fd is no longer valid

int rst_open (  char *  i, int  mode )

Open a raw socket. Parameters: i  Ethernet interface of the form ethN mode  if non-zero, open the socket in promiscuous mode Postcondition: open a raw socket with protocol ETH_P_ALL Returns: the file descriptor or 0 on failure

int rst_receive (  int  fd, unsigned char *  buf, int  t )

Receive next frame. Parameters: fd  file descriptor buf  frame buffer t  read timeout in seconds. If t = -1, rst_receive blocks until the next frame arrives. Precondition: fd is a open file descriptor returned by rst_open buf points to at least 1514 bytes Postcondition: buf[0..r-1] contains the frame, where r is the return value Returns: number of bytes read or -1 on error

int rst_send (  int  fd, unsigned char *  buf, int  len )

Send a raw ethernet frame. Parameters: fd  file descriptor buf  frame buffer len  buffer length in bytes Precondition: fd is a open file descriptor returned by rst_open. buf points to at least len bytes. len in [64..1514] Postcondition: fd[0..len-1] is sent to the interface associated with fd Returns: 0 on success and -1 on error

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