Useful methods for Network handling such as ip addresses. More...

#include <sbgCommon.h>

Include dependency graph for sbgNetwork.h:

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Macros
#define	SBG_IPV4_BROADCAST_ADDR sbgIpAddr(255, 255, 255, 255)

#define	SBG_IPV4_UNSPECIFIED_ADDR sbgIpAddr(0, 0, 0, 0)

Functions
SBG_INLINE sbgIpAddress	sbgIpAddr (uint8 a, uint8 b, uint8 c, uint8 d)

SBG_INLINE bool	sbgIpAddressIsUnspecified (sbgIpAddress ipAddress)

SBG_INLINE bool	sbgIpAddressValid (sbgIpAddress ipAddress)

SBG_INLINE uint8	sbgIpAddrGetA (sbgIpAddress ipAddr)

SBG_INLINE uint8	sbgIpAddrGetB (sbgIpAddress ipAddr)

SBG_INLINE uint8	sbgIpAddrGetC (sbgIpAddress ipAddr)

SBG_INLINE uint8	sbgIpAddrGetD (sbgIpAddress ipAddr)

SBG_INLINE bool	sbgIpAddrIsSameNetwork (sbgIpAddress firstIpAddr, sbgIpAddress secondIpAddr, sbgIpAddress netmask)

SBG_INLINE sbgIpAddress	sbgIpAddrWithinSubnet (sbgIpAddress ipAddress, sbgIpAddress netmask)

SBG_INLINE sbgIpAddress	sbgIpGetHostAddr (sbgIpAddress ipAddress, sbgIpAddress netmask)

SBG_INLINE sbgIpAddress	sbgIpGetNetworkAddr (sbgIpAddress ipAddress, sbgIpAddress netmask)

bool	sbgIpNetMaskValid (sbgIpAddress netmask)

sbgIpAddress	sbgNetworkIpFromString (const char *pBuffer)

void	sbgNetworkIpToString (sbgIpAddress ipAddr, char *pBuffer, size_t maxSize)

Detailed Description

Useful methods for Network handling such as ip addresses.

Author: SBG Systems (Raphael Siryani)

Date: 15 September 2015

IP v4 address is stored in memory with a uint32. Each address component A.B.C.D is stored in 8 bits using the network endianess ie Big Endian.

We thus have the following memory organisation:

In Little Endian: |LSB| | |MSB| | A | B | C | D |

In Big Endian: |MSB| | |LSB| | A | B | C | D |

Copyright Notice

This source code is intended for use only by SBG Systems SAS and those that have explicit written permission to use it from SBG Systems SAS.

THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.

Definition in file sbgNetwork.h.

Macro Definition Documentation

#define SBG_IPV4_BROADCAST_ADDR sbgIpAddr(255, 255, 255, 255)

Broadcast IP address used to address all devices within the same network.

Definition at line 51 of file sbgNetwork.h.

#define SBG_IPV4_UNSPECIFIED_ADDR sbgIpAddr(0, 0, 0, 0)

This represents an undefined IP address.

Definition at line 50 of file sbgNetwork.h.

Function Documentation

SBG_INLINE sbgIpAddress sbgIpAddr	(	uint8	a,
		uint8	b,
		uint8	c,
		uint8	d
	)

Build an IP V4 address in the form a.b.c.d

Parameters

[in]	a	First 8 bits IP address.
[in]	b	Second 8 bits IP address.
[in]	c	Third 8 bits IP address.
[in]	d	Last 8 bits IP address.

Returns: An initialized IP address object.

Definition at line 65 of file sbgNetwork.h.

SBG_INLINE bool sbgIpAddressIsUnspecified ( sbgIpAddress ipAddress )

Returns true if the provided IP address is unspecified ie (0.0.0.0)

Parameters

[in] ipAddress The ip address to test

Returns: true if the ip address is unspecified or false otherwise.

Definition at line 184 of file sbgNetwork.h.

SBG_INLINE bool sbgIpAddressValid ( sbgIpAddress ipAddress )

Check if an IpV4 address is valid. The ip address format is A.B.C.D and A should respect 0 < A < 224

Parameters

[in] ipAddress The ip address stored in an uint32 (host endianness).

Returns: true if the ip address is valid ie contiguous.

Definition at line 201 of file sbgNetwork.h.

SBG_INLINE uint8 sbgIpAddrGetA ( sbgIpAddress ipAddr )

Return the first A field of of an IP v4 address of the form A.B.C.D

Parameters

[in] ipAddr An sbgIpAddress to convert.

Returns: The A field of the IP address.

Definition at line 79 of file sbgNetwork.h.

SBG_INLINE uint8 sbgIpAddrGetB ( sbgIpAddress ipAddr )

Return the first B field of of an IP v4 address of the form A.B.C.D

Parameters

[in] ipAddr An sbgIpAddress to convert.

Returns: The B field of the IP address.

Definition at line 93 of file sbgNetwork.h.

SBG_INLINE uint8 sbgIpAddrGetC ( sbgIpAddress ipAddr )

Return the first C field of of an IP v4 address of the form A.B.C.D

Parameters

[in] ipAddr An sbgIpAddress to convert.

Returns: The C field of the IP address.

Definition at line 107 of file sbgNetwork.h.

SBG_INLINE uint8 sbgIpAddrGetD ( sbgIpAddress ipAddr )

Return the first D field of of an IP v4 address of the form A.B.C.D

Parameters

[in] ipAddr An sbgIpAddress to convert.

Returns: The D field of the IP address.

Definition at line 121 of file sbgNetwork.h.

SBG_INLINE bool sbgIpAddrIsSameNetwork	(	sbgIpAddress	firstIpAddr,
		sbgIpAddress	secondIpAddr,
		sbgIpAddress	netmask
	)

Check if two ip addresses are in the same network given the subnet.

Parameters

[in]	firstIpAddr	The first IP address to check.
[in]	secondIpAddr	The second IP address to check.
[in]	netmask	The netmask of the network.

Returns: true if the two ip addresses are in the same network.

Definition at line 250 of file sbgNetwork.h.

SBG_INLINE sbgIpAddress sbgIpAddrWithinSubnet	(	sbgIpAddress	ipAddress,
		sbgIpAddress	netmask
	)

Given an ip address and the netmask, returns true if this ip address is within the subnet.

Parameters

[in]	ipAddress	The ip address stored in an uint32 (host endianness).
[in]	netmask	The netmask stored in an uint32 (host endianness).

Returns: true if this ip address is within the subnet or false otherwise.

Definition at line 228 of file sbgNetwork.h.

SBG_INLINE sbgIpAddress sbgIpGetHostAddr	(	sbgIpAddress	ipAddress,
		sbgIpAddress	netmask
	)

Given an ip address and the netmask, returns the host part (ip & ~subnetMask)

Parameters

[in]	ipAddress	The ip address stored in an uint32 (host endianness).
[in]	netmask	The netmask stored in an uint32 (host endianness).

Returns: The host part of the ip address.

Definition at line 170 of file sbgNetwork.h.

SBG_INLINE sbgIpAddress sbgIpGetNetworkAddr	(	sbgIpAddress	ipAddress,
		sbgIpAddress	netmask
	)

Given an ip address and the netmask, returns the network part (ip & subnetMask)

Parameters

[in]	ipAddress	The ip address stored in an uint32 (host endianness).
[in]	netmask	The netmask stored in an uint32 (host endianness).

Returns: The network part of the ip address.

Definition at line 159 of file sbgNetwork.h.

bool sbgIpNetMaskValid ( sbgIpAddress netmask )

Check if an IpV4 netmask is valid, the mask should be contiguous (1111 followed by 0)

Parameters

[in] netmask The netmask stored in an uint32 (host endianness).

Returns: true if the netmask is valid ie contiguous.

Definition at line 81 of file sbgNetwork.c.

sbgIpAddress sbgNetworkIpFromString ( const char * pBuffer )

Convert an ip address stored in a string of the form A.B.C.D to an sbgIpAddress object.

Parameters

[in] pBuffer IP address as a string of the form A.B.C.D

Returns: IP address parsed from the string or 0.0.0.0 if the IP is invalid.

Definition at line 35 of file sbgNetwork.c.

void sbgNetworkIpToString	(	sbgIpAddress	ipAddr,
		char *	pBuffer,
		size_t	maxSize
	)

Convert an ip to a string of the form A.B.C.D

Parameters

[in]	ipAddr	IP address to convert to a string.
[out]	pBuffer	Pointer on an allocated buffer than can hold ip address as a string.
[in]	maxSize	Maximum number of chars that can be stored in pBuffer including the NULL char.

Definition at line 14 of file sbgNetwork.c.

Macros

Functions

Detailed Description

Copyright Notice

Macro Definition Documentation

Function Documentation