ip.c File Reference

IP-agnostic packet. More...

#include "ip.h"
#include "rohc_utils.h"
#include "protocols/ip_numbers.h"
#include "protocols/ip.h"
#include "protocols/ipv4.h"
#include "protocols/ipv6.h"
#include <string.h>
#include <assert.h>

Include dependency graph for ip.c:

Functions
void	ip_set_version (struct ip_packet *const ip, const ip_version value)
	Set the IP version of an IP packet. More...
uint8_t	ip_get_protocol (const struct ip_packet *const ip)
	Get the protocol transported by an IP packet. More...
void	ip_set_protocol (struct ip_packet *const ip, const uint8_t value)
	Set the protocol transported by an IP packet. More...
unsigned int	ip_get_tos (const struct ip_packet *const ip)
	Get the IPv4 Type Of Service (TOS) or IPv6 Traffic Class (TC) of an IP packet. More...
void	ip_set_tos (struct ip_packet *const ip, const uint8_t value)
	Set the IPv4 Type Of Service (TOS) or IPv6 Traffic Class (TC) of an IP packet. More...
unsigned int	ip_get_ttl (const struct ip_packet *const ip)
	Get the IPv4 Time To Live (TTL) or IPv6 Hop Limit (HL) of an IP packet. More...
void	ip_set_ttl (struct ip_packet *const ip, const uint8_t value)
	Set the IPv4 Time To Live (TTL) or IPv6 Hop Limit (HL) of an IP packet. More...
void	ip_set_saddr (struct ip_packet *const ip, const uint8_t *value)
	Set the Source Address of an IP packet. More...
void	ip_set_daddr (struct ip_packet *const ip, const uint8_t *value)
	Set the Destination Address of an IP packet. More...

Detailed Description

IP-agnostic packet.

Author

Didier Barvaux didie.nosp@m.r.ba.nosp@m.rvaux.nosp@m.@tou.nosp@m.louse.nosp@m..viv.nosp@m.eris..nosp@m.com

Didier Barvaux didie.nosp@m.r@ba.nosp@m.rvaux.nosp@m..org

Function Documentation

ip_get_protocol()

uint8_t ip_get_protocol

(

const struct ip_packet *const

ip

)

Get the protocol transported by an IP packet.

The protocol returned is the one transported by the last known IP extension header if any is found.

The function handles ip_packet whose ip_packet::version is IP_UNKNOWN. It always returns the special value 0.

Parameters

ip	The IP packet to analyze

Returns

The protocol number that identify the protocol transported by the given IP packet, 0 if the packet is not IPv4 nor IPv6

ip_get_tos()

unsigned int ip_get_tos

(

const struct ip_packet *const

ip

)

Get the IPv4 Type Of Service (TOS) or IPv6 Traffic Class (TC) of an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to analyze

Returns

The TOS or TC value if successful, 0 otherwise

ip_get_ttl()

unsigned int ip_get_ttl

(

const struct ip_packet *const

ip

)

Get the IPv4 Time To Live (TTL) or IPv6 Hop Limit (HL) of an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to analyze

Returns

The TTL or HL value if successful, 0 otherwise

ip_set_daddr()

void ip_set_daddr	(	struct ip_packet *const	ip,
		const uint8_t *	value
	)

Set the Destination Address of an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to modify
value	The IP address value

ip_set_protocol()

void ip_set_protocol	(	struct ip_packet *const	ip,
		const uint8_t	value
	)

Set the protocol transported by an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to modify
value	The protocol value

ip_set_saddr()

void ip_set_saddr	(	struct ip_packet *const	ip,
		const uint8_t *	value
	)

Set the Source Address of an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to modify
value	The IP address value

ip_set_tos()

void ip_set_tos	(	struct ip_packet *const	ip,
		const uint8_t	value
	)

Set the IPv4 Type Of Service (TOS) or IPv6 Traffic Class (TC) of an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to modify
value	The TOS/TC value

ip_set_ttl()

void ip_set_ttl	(	struct ip_packet *const	ip,
		const uint8_t	value
	)

Set the IPv4 Time To Live (TTL) or IPv6 Hop Limit (HL) of an IP packet.

The function does not handle ip_packet whose ip_packet::version is IP_UNKNOWN.

Parameters

ip	The IP packet to modify
value	The TTL/HL value

ip_set_version()

void ip_set_version	(	struct ip_packet *const	ip,
		const ip_version	value
	)

Set the IP version of an IP packet.

Parameters

ip	The IP packet to modify
value	The version value