//---------------------------------------------------------------------------------------
// Name: DHCP_GetIPAddress
// Param: -
// Return: TRUE in case of success, FALSE if an error occurred
//
// Description: This function is used to get IP Address and other network parameters using DHCP
//---------------------------------------------------------------------------------------
bool DHCP_GetIPAddress(void) {
uint8_t u8Index;
uint8_t u8Socket = DHCP_SOCKET;
bool bResult = FALSE;
/* Initializations */
g_DHCP_LeaseTime = 0;
for (u8Index = 0; u8Index < 4; u8Index++) {
g_DHCP_YourIPAddress[u8Index] = 0;
g_DHCP_RouterIPAddress[u8Index] = 0;
g_DHCP_DNSIPAddress[u8Index] = 0;
g_DHCP_SubnetMask[u8Index] = 0;
g_DHCP_ServerIPAddress[u8Index] = 0;
}
/* Open a new socket */
if (SOCK_OpenSocket(u8Socket, W5100_SKT_MR_UDP, DHCP_CLIENT_PORT)==ERR_OK) {
/* Send DISCOVER message */
if (DHCP_SendMessage(u8Socket, DHCP_DISCOVER) == TRUE) {
/* Parse OFFER message */
if (DHCP_Parse(u8Socket) == DHCP_OFFER) {
/* Send REQUEST message */
if (DHCP_SendMessage(u8Socket, DHCP_REQUEST) == TRUE) {
/* Parse ACK message */
if (DHCP_Parse(u8Socket) == DHCP_ACK) {
/* Set Gateway IP Address */
W5100_MemWriteByte(W5100_GAR0, g_DHCP_RouterIPAddress[0]);
W5100_MemWriteByte(W5100_GAR1, g_DHCP_RouterIPAddress[1]);
W5100_MemWriteByte(W5100_GAR2, g_DHCP_RouterIPAddress[2]);
W5100_MemWriteByte(W5100_GAR3, g_DHCP_RouterIPAddress[3]);
/* Set Subnet Mask */
W5100_MemWriteByte(W5100_SUBR0, g_DHCP_SubnetMask[0]);
W5100_MemWriteByte(W5100_SUBR1, g_DHCP_SubnetMask[1]);
W5100_MemWriteByte(W5100_SUBR2, g_DHCP_SubnetMask[2]);
W5100_MemWriteByte(W5100_SUBR3, g_DHCP_SubnetMask[3]);
/* Set my IP Address */
W5100_MemWriteByte(W5100_SIPR0, g_DHCP_YourIPAddress[0]);
W5100_MemWriteByte(W5100_SIPR1, g_DHCP_YourIPAddress[1]);
W5100_MemWriteByte(W5100_SIPR2, g_DHCP_YourIPAddress[2]);
W5100_MemWriteByte(W5100_SIPR3, g_DHCP_YourIPAddress[3]);
bResult = TRUE;
}
}
}
}
/* Close the socket (socket can be used later in the application) */
SOCKET_Close(u8Socket);
}
return bResult;
}
/**
* Creates new INET socket of specified type (datagram/stream)
* Note that both port and IP address are assumed to be in host
* byte order
*/
Bool SOCKET_Create(int type, IPaddr ipaddr, Port port, Socket * sock)
{
ASSERT(sock);
if (sock) {
Socket s;
*sock = INVALID_SOCKET;
s = socket(AF_INET, type, 0);
if (s == INVALID_SOCKET) {
Error(TEXT("ERROR: cannot create socket, error %d\n"),
SOCKET_GetLastError());
} else {
int err;
struct sockaddr_in sa;
/* initialize sockaddr_in */
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if (ipaddr) sa.sin_addr.s_addr = htonl(ipaddr);
/* bind to port */
err = bind(s,(struct sockaddr*)&sa,sizeof(sa));
if (err) {
if (port) {
Error(TEXT("ERROR: cannot bind to port %hu, error %d\n"),
port, SOCKET_GetLastError());
} else {
Error(TEXT("ERROR: cannot bind socket, error %d\n"),
SOCKET_GetLastError());
}
SOCKET_Close(s);
} else {
*sock = s;
return True;
}
}
}
return False;
}
