iputil.c File Reference

IPv4 And IPv6 Utiliies. More...

#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <linux/ip.h>
#include <linux/icmp.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <netdb.h>
#include "include/dtsapp.h"

Go to the source code of this file.

Data Structures
struct	pseudohdr
	IPv4 header structur to cast a packet too. More...

Enumerations
enum	ipversion { IP_PROTO_V4 = 4, IP_PROTO_V6 = 6 }
	IP Protocol numbers. More...

Functions
int	checkipv6mask (const char *ipaddr, const char *network, uint8_t bits)
	Check if ipaddr is in a network. More...
void	ipv4tcpchecksum (uint8_t *pkt)
	Update the TCP checksum of a IPv4 packet. More...
void	ipv4udpchecksum (uint8_t *pkt)
	Update the UDP checksum of a IPv4 packet. More...
void	ipv4icmpchecksum (uint8_t *pkt)
	Set the checksup of a IPv4 ICMP packet. More...
void	ipv4checksum (uint8_t *pkt)
	Set the checksup of a IPv4 Packet. More...
int	packetchecksumv4 (uint8_t *pkt)
	Update the checksum of a IPv4 packet. More...
int	packetchecksumv6 (uint8_t *pkt)
	Prototype to check checksup on packet. More...
int	packetchecksum (uint8_t *pkt)
	Generic IPv4 and IPv6 Checksum. More...
const char *	cidrtosn (int bitlen, char *buf, int size)
	Return the dotted quad notation subnet mask from a CIDR. More...
const char *	getnetaddr (const char *ipaddr, int cidr, char *buf, int size)
	Return the network address. More...
const char *	getfirstaddr (const char *ipaddr, int cidr, char *buf, int size)
	Get the first usable address. More...
const char *	getbcaddr (const char *ipaddr, int cidr, char *buf, int size)
	Return broadcast address. More...
const char *	getlastaddr (const char *ipaddr, int cidr, char *buf, int size)
	Get the last usable address. More...
uint32_t	cidrcnt (int bitlen)
	Return the number of IP addresses in a given bitmask. More...
int	reservedip (const char *ipaddr)
	Check IP against list of reserved IP's. More...
char *	ipv6to4prefix (const char *ipaddr)
	Return IPv6 to IPv4 Prefix fot the address. More...
int	check_ipv4 (const char *ip, int cidr, const char *test)
	Check if a IP address is in a network. More...
void	mcast6_ip (struct in6_addr *addr)
	Randomally assign a SSM Multicast address.param addr Ip address structure to fill out. More...
void	mcast4_ip (struct in_addr *addr)
	Randomally assign a SSM Multicast address. More...
int	inet_lookup (int family, const char *host, void *addr, socklen_t len)
	Perform DNS lookup on a host/ip retun the IP address. More...

Detailed Description

IPv4 And IPv6 Utiliies.

Definition in file iputil.c.