/**
If AP->StationPort isn't zero, check whether the access point
is registered, else generate a random station port for this
access point.
@param AP Pointer to the access point.
@retval EFI_SUCCESS The check is passed or the port is assigned.
@retval EFI_INVALID_PARAMETER The non-zero station port is already used.
@retval EFI_OUT_OF_RESOURCES No port can be allocated.
**/
EFI_STATUS
Tcp4Bind (
IN EFI_TCP4_ACCESS_POINT *AP
)
{
BOOLEAN Cycle;
if (0 != AP->StationPort) {
//
// check if a same endpoint is bound
//
if (TcpFindTcbByPeer (&AP->StationAddress, AP->StationPort)) {
return EFI_INVALID_PARAMETER;
}
} else {
//
// generate a random port
//
Cycle = FALSE;
if (TCP4_PORT_USER_RESERVED == mTcp4RandomPort) {
mTcp4RandomPort = TCP4_PORT_KNOWN;
}
mTcp4RandomPort++;
while (TcpFindTcbByPeer (&AP->StationAddress, mTcp4RandomPort)) {
mTcp4RandomPort++;
if (mTcp4RandomPort <= TCP4_PORT_KNOWN) {
if (Cycle) {
DEBUG ((EFI_D_ERROR, "Tcp4Bind: no port can be allocated "
"for this pcb\n"));
return EFI_OUT_OF_RESOURCES;
}
mTcp4RandomPort = TCP4_PORT_KNOWN + 1;
Cycle = TRUE;
}
}
AP->StationPort = mTcp4RandomPort;
}
return EFI_SUCCESS;
}
/**
If TcpAp->StationPort isn't zero, check whether the access point
is registered, else generate a random station port for this
access point.
@param[in] TcpAp Pointer to the access point.
@param[in] IpVersion IP_VERSION_4 or IP_VERSION_6
@retval EFI_SUCCESS The check passed or the port is assigned.
@retval EFI_INVALID_PARAMETER The non-zero station port is already used.
@retval EFI_OUT_OF_RESOURCES No port can be allocated.
**/
EFI_STATUS
TcpBind (
IN TCP_ACCESS_POINT *TcpAp,
IN UINT8 IpVersion
)
{
BOOLEAN Cycle;
EFI_IP_ADDRESS Local;
UINT16 *Port;
UINT16 *RandomPort;
if (IpVersion == IP_VERSION_4) {
IP4_COPY_ADDRESS (&Local, &TcpAp->Tcp4Ap.StationAddress);
Port = &TcpAp->Tcp4Ap.StationPort;
RandomPort = &mTcp4RandomPort;
} else {
IP6_COPY_ADDRESS (&Local, &TcpAp->Tcp6Ap.StationAddress);
Port = &TcpAp->Tcp6Ap.StationPort;
RandomPort = &mTcp6RandomPort;
}
if (0 != *Port) {
//
// Check if a same endpoing is bound.
//
if (TcpFindTcbByPeer (&Local, *Port, IpVersion)) {
return EFI_INVALID_PARAMETER;
}
} else {
//
// generate a random port
//
Cycle = FALSE;
if (TCP_PORT_USER_RESERVED == *RandomPort) {
*RandomPort = TCP_PORT_KNOWN;
}
(*RandomPort)++;
while (TcpFindTcbByPeer (&Local, *RandomPort, IpVersion)) {
(*RandomPort)++;
if (*RandomPort <= TCP_PORT_KNOWN) {
if (Cycle) {
DEBUG (
(EFI_D_ERROR,
"TcpBind: no port can be allocated for this pcb\n")
);
return EFI_OUT_OF_RESOURCES;
}
*RandomPort = TCP_PORT_KNOWN + 1;
Cycle = TRUE;
}
}
*Port = *RandomPort;
}
return EFI_SUCCESS;
}
