DHCP.c File Reference

---

Detailed Description

Dynamic Host Configuration Protocol (DHCP) Client Module for Microchip TCP/IP Stack.

• Provides automatic IP address, subnet mask, gateway address, DNS server address, and other configuration parameters on DHCP enabled networks.
• Reference: RFC 2131, 2132

• Dependencies: UDP
• Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F, PIC32
• Compiler: Microchip C32 v1.00 or higher Microchip C30 v3.01 or higher Microchip C18 v3.13 or higher HI-TECH PICC-18 STD 9.50PL3 or higher
• Company: Microchip Technology, Inc.

See the Microchip License Agreement for more details.

Modifications to the original file

• Search for "MODIFIX" in the code !
• Removed preprocessor macro STACK_USE_DHCP_CLIENT as always defined.
• Implemented the AutoIP feature. If the DHCP client does not find any DHCP server and for that reason gets no IP address, a IP address in the 169.254.X.X address pool is choosen. The following functions are affected:
  1. Extended the function DHCPReset()
  2. Extended the function DHCPTask()
• Removed hostname things

Todo:

Generate a doxygen page for discussing the Netzer project and the DHCP and AutoIP behavior (High level).

Functions
void	DHCPReset (void)
	Resets the DHCP Client.
void	DHCPDisable (void)
	Disables the DHCP client.
void	DHCPEnable (void)
	Enables the DHCP client.
BOOL	DHCPIsEnabled (void)
	This function returns the enable state of the DHCP client.
BOOL	DHCPHasFailed (void)
	This function returns the failed state of the DHCP client.
void	DHCPTask (void)
	Performs periodic DHCP tasks.
BOOL	DHCPHasBoundStateChanged (void)
	This function checks whether the internal address bound state of thze DHCP client has changed.
void	DHCPGetIPParameterFromServer (IPConfig_t *pIPConfig)
	If DHCP client is bound this function fills the given IP structure with the current IP parameters obtained from DHCP server.