util.c File Reference

#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include "socketIO.h"
#include "packetHeader.h"
#include "util.h"

Functions
int	rst_MACatoi (char *MACstring, unsigned char *MACint)
	Convert a MAC address from ASCII to integer.
char *	rst_MACitoa (unsigned char *MACint, char *MACstring)
	Convert a MAC address from integer to ASCII.
int	rst_getMAC (char *i, unsigned char *MACint)
	Retrieve the MAC address for interface i.
int	rst_IPatoi (char *ipString, int *ipInt)
	Convert an IP address from ASCII to integer.
char *	rst_IPitoa (unsigned int ipInt, char *ipString)
	Convert an IP address from integer to ASCII.
int	rst_getIPaddr (char *i, unsigned int *ipInt)
	Retrieve the IP address for interface i.
int	rst_getIPmask (char *i, unsigned int *mask)
	Retrieve the IP network mask for interface i.
void	rst_maskInc (unsigned int *target, unsigned int mask)
	Increment the masked portion of target.

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Function Documentation

int rst_getIPaddr (  char *  i, unsigned int *  ipInt )

Retrieve the IP address for interface i. Parameters: i  an Ethernet interface ipInt  an IP address Precondition: i is a null-terminated string Postcondition: if the call succeeds ipInt contains the IP address for i otherwise *ipInt is unchanged Returns: 0: success 1: rst_open failure 2: ioctl failure

int rst_getIPmask (  char *  i, unsigned int *  mask )

Retrieve the IP network mask for interface i. Parameters: i  an Ethernet interface mask  an IP address Precondition: i is the string name of a local Ethernet interface Postcondition: if the call succeeds mask contains the network mask for i otherwise *mask is unchanged Returns: 0: success 1: rst_open failure 2: ioctl failure

int rst_getMAC (  char *  i, unsigned char *  MACint )

Retrieve the MAC address for interface i. Parameters: i  an Ethernet interface MACint  a MAC address in integer form Precondition: i is a null-terminated string MACint is an array of at least 6 bytes Postcondition: if the call succeeds MACint contains the MAC address for i; otherwise *MACint is unchanged Returns: 0: success 1: rst_open failure 2: ioctl failure

int rst_IPatoi (  char *  ipString, int *  ipInt )

Convert an IP address from ASCII to integer. A legal string IP address is of the form "I1.I2.I3.I4" where each of I1, I2, I3, and I4 is a 1, 2, or 3 digit decimal integer. Parameters: ipString  the IP address in ASCII form ipInt  the resulting IP address in integer form Precondition: ipString is a null-terminated string *ipInt is allocated Postcondition: if the call succeeds ipInt contains the IP address for i; otherwise *ipInt is unchanged Returns: 0: success non-zero: conversion failure

char* rst_IPitoa (  unsigned int  ipInt, char *  ipString )

Convert an IP address from integer to ASCII. Parameters: ipInt  an IP address in integer form in hyost byte order ipString  a string buffer Precondition: ipString is at least 16 bytes long Postcondition: ipString contains the converted address Returns: ipString

int rst_MACatoi (  char *  MACstring, unsigned char *  MACint )

Convert a MAC address from ASCII to integer. A legal string MAC address is of the form "D1:D2:D3:D4:D5:D6" where each of D1, D2, ..., D5 is 1 or 2 digit hex number. Parameters: MACstring  a MAC address in string form MACint  the resulting MAC address in integer form Precondition: MACint is an array of at least 6 bytes Postcondition: if the call succeeds MACint contains the converted address; otherwise *MACint is unchanged. Returns: 0: success non-zero: conversion failure

char* rst_MACitoa (  unsigned char *  MACint, char *  MACstring )

Convert a MAC address from integer to ASCII. Parameters: MACint  a MAC address in integer form MACstring  the resulting MAC address in string form Precondition: MACstring is at least 18 bytes long MACint is an array of at least 6 bytes Postcondition: MACint contains the converted address Returns: MACstring

void rst_maskInc (  unsigned int *  target, unsigned int  mask )

Increment the masked portion of target. Parameters: target  an IP address mask  an IP address Precondition: *target contains at least 4 bytes Postcondition: increment the masked portion of target, with rollover the unmasked portion of target is unchanged Returns: 0 for failure; non-zero for success

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