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XgDHCPC


Data Structures

struct  DYNCFG

Functions

int NutDhcpParse (DYNCFG *cfgp, struct bootp *bp, int len)
 Parse a DHCP reply telegram.

int NutDhcpDiscover (UDPSOCKET *sock, u_long daddr, u_short dport, struct bootp *bp, DYNCFG *cfgp)
 Broadcast a DHCP discover telegram.

int NutDhcpRequest (UDPSOCKET *sock, u_long daddr, u_short dport, struct bootp *bp, DYNCFG *cfgp)
int NutDhcpRelease (UDPSOCKET *sock, u_long daddr, u_short dport, struct bootp *bp, DYNCFG *cfgp)
int NutDhcpClientStart (NUTDEVICE *dev)
 Start DHCP Client.

Function Documentation

int NutDhcpClientStart (  NUTDEVICE *    dev ) 
 

Start DHCP Client.

Note:
Applications typically do not call this function. It's automatically called by NutNetIfConfig(), if the IP address parameter is set to zero.
Bug:
The client doesn't send update information to the server. To avoid loosing the assignment while Ethernut is down, addresses can be fixed in the DHCP server tables.

int NutDhcpDiscover (  UDPSOCKET *    sock,
u_long    daddr,
u_short    dport,
struct bootp *    bp,
DYNCFG *    cfgp
) 
 

Broadcast a DHCP discover telegram.

Parameters:
sock  Socket descriptor. This pointer must have been retrieved by calling NutUdpCreateSocket().
daddr  Destination IP address, typically INADDR_BROADCAST.
dport  Destination port, typically 67.
bp  Pointer to a buffer to be used for transmission. No specific initialization required.
cfgp  Pointer to an initialized DYNCFG structure.
Returns:
0 on success, -1 if send failed.

int NutDhcpParse (  DYNCFG *    cfgp,
struct bootp *    bp,
int    len
) 
 

Parse a DHCP reply telegram.

Parameters:
cfgp  Pointer to config structure.
bp  Pointer to the reply telegram.
len  Number of valid bytes in the reply telegram.
Returns:
0 on success, -1 otherwise.

int NutDhcpRelease (  UDPSOCKET *    sock,
u_long    daddr,
u_short    dport,
struct bootp *    bp,
DYNCFG *    cfgp
) 
 

Release our ip address.

int NutDhcpRequest (  UDPSOCKET *    sock,
u_long    daddr,
u_short    dport,
struct bootp *    bp,
DYNCFG *    cfgp
) 
 

Broadcast the offered settings.

Parameters:
sock  Socket descriptor. This pointer must have been retrieved by calling NutUdpCreateSocket().
daddr  Destination IP address, typically INADDR_BROADCAST.
dport  Destination port, typically 67.
bp  Pointer to a buffer to be used for transmission.
cfgp  Pointer to an initialized DYNCFG structure.
Returns:
0 on success, -1 if send failed.

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