Ip4Impl.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
Copyright (c) 2005 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "Ip4Impl.h"
/**
Gets the current operational settings for this instance of the EFI IPv4 Protocol driver.
The GetModeData() function returns the current operational mode data for this
driver instance. The data fields in EFI_IP4_MODE_DATA are read only. This
function is used optionally to retrieve the operational mode data of underlying
networks or drivers.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[out] Ip4ModeData Pointer to the EFI IPv4 Protocol mode data structure.
@param[out] MnpConfigData Pointer to the managed network configuration data structure.
@param[out] SnpModeData Pointer to the simple network mode data structure.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_OUT_OF_RESOURCES The required mode data could not be allocated.
**/
);
/**
Assigns an IPv4 address and subnet mask to this EFI IPv4 Protocol driver instance.
The Configure() function is used to set, change, or reset the operational
parameters and filter settings for this EFI IPv4 Protocol instance. Until these
parameters have been set, no network traffic can be sent or received by this
instance. Once the parameters have been reset (by calling this function with
IpConfigData set to NULL), no more traffic can be sent or received until these
parameters have been set again. Each EFI IPv4 Protocol instance can be started
and stopped independently of each other by enabling or disabling their receive
filter settings with the Configure() function.
When IpConfigData.UseDefaultAddress is set to FALSE, the new station address will
be appended as an alias address into the addresses list in the EFI IPv4 Protocol
driver. While set to TRUE, Configure() will trigger the EFI_IP4_CONFIG_PROTOCOL
to retrieve the default IPv4 address if it is not available yet. Clients could
frequently call GetModeData() to check the status to ensure that the default IPv4
address is ready.
If operational parameters are reset or changed, any pending transmit and receive
requests will be cancelled. Their completion token status will be set to EFI_ABORTED
and their events will be signaled.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] IpConfigData Pointer to the EFI IPv4 Protocol configuration data structure.
@retval EFI_SUCCESS The driver instance was successfully opened.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
@retval EFI_UNSUPPORTED One or more of the following conditions is TRUE:
A configuration protocol (DHCP, BOOTP, RARP, etc.) could
not be located when clients choose to use the default IPv4
address. This EFI IPv4 Protocol implementation does not
support this requested filter or timeout setting.
@retval EFI_OUT_OF_RESOURCES The EFI IPv4 Protocol driver instance data could not be allocated.
@retval EFI_ALREADY_STARTED The interface is already open and must be stopped before the
IPv4 address or subnet mask can be changed. The interface must
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The EFI IPv4
Protocol driver instance is not opened.
**/
);
/**
Joins and leaves multicast groups.
The Groups() function is used to join and leave multicast group sessions. Joining
a group will enable reception of matching multicast packets. Leaving a group will
disable the multicast packet reception.
If JoinFlag is FALSE and GroupAddress is NULL, all joined groups will be left.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] JoinFlag Set to TRUE to join the multicast group session and FALSE to leave.
@param[in] GroupAddress Pointer to the IPv4 multicast address.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following is TRUE:
- This is NULL.
- JoinFlag is TRUE and GroupAddress is NULL.
- GroupAddress is not NULL and *GroupAddress is
not a multicast IPv4 address.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_OUT_OF_RESOURCES System resources could not be allocated.
@retval EFI_UNSUPPORTED This EFI IPv4 Protocol implementation does not support multicast groups.
@retval EFI_ALREADY_STARTED The group address is already in the group table (when
JoinFlag is TRUE).
@retval EFI_NOT_FOUND The group address is not in the group table (when JoinFlag is FALSE).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
**/
);
/**
Adds and deletes routing table entries.
The Routes() function adds a route to or deletes a route from the routing table.
Routes are determined by comparing the SubnetAddress with the destination IPv4
address arithmetically AND-ed with the SubnetMask. The gateway address must be
on the same subnet as the configured station address.
The default route is added with SubnetAddress and SubnetMask both set to 0.0.0.0.
The default route matches all destination IPv4 addresses that do not match any
other routes.
A GatewayAddress that is zero is a nonroute. Packets are sent to the destination
IP address if it can be found in the ARP cache or on the local subnet. One automatic
nonroute entry will be inserted into the routing table for outgoing packets that
are addressed to a local subnet (gateway address of 0.0.0.0).
Each EFI IPv4 Protocol instance has its own independent routing table. Those EFI
IPv4 Protocol instances that use the default IPv4 address will also have copies
of the routing table that was provided by the EFI_IP4_CONFIG_PROTOCOL, and these
copies will be updated whenever the EIF IPv4 Protocol driver reconfigures its
instances. As a result, client modification to the routing table will be lost.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] DeleteRoute Set to TRUE to delete this route from the routing table. Set to
FALSE to add this route to the routing table. SubnetAddress
and SubnetMask are used as the key to each route entry.
@param[in] SubnetAddress The address of the subnet that needs to be routed.
@param[in] SubnetMask The subnet mask of SubnetAddress.
@param[in] GatewayAddress The unicast gateway IPv4 address for this route.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_NOT_STARTED The driver instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
- This is NULL.
- SubnetAddress is NULL.
- SubnetMask is NULL.
- GatewayAddress is NULL.
- *SubnetAddress is not a valid subnet address.
- *SubnetMask is not a valid subnet mask.
- *GatewayAddress is not a valid unicast IPv4 address.
@retval EFI_OUT_OF_RESOURCES Could not add the entry to the routing table.
@retval EFI_NOT_FOUND This route is not in the routing table (when DeleteRoute is TRUE).
@retval EFI_ACCESS_DENIED The route is already defined in the routing table (when
DeleteRoute is FALSE).
**/
);
/**
Places outgoing data packets into the transmit queue.
The Transmit() function places a sending request in the transmit queue of this
EFI IPv4 Protocol instance. Whenever the packet in the token is sent out or some
errors occur, the event in the token will be signaled and the status is updated.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] Token Pointer to the transmit token.
@retval EFI_SUCCESS The data has been queued for transmission.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more pameters are invalid.
@retval EFI_ACCESS_DENIED The transmit completion token with the same Token.Event
was already in the transmit queue.
@retval EFI_NOT_READY The completion token could not be queued because the transmit
queue is full.
@retval EFI_NOT_FOUND Not route is found to destination address.
@retval EFI_OUT_OF_RESOURCES Could not queue the transmit data.
@retval EFI_BUFFER_TOO_SMALL Token.Packet.TxData.TotalDataLength is too
short to transmit.
@retval EFI_BAD_BUFFER_SIZE The length of the IPv4 header + option length + total data length is
greater than MTU (or greater than the maximum packet size if
Token.Packet.TxData.OverrideData.
DoNotFragment is TRUE.)
**/
);
/**
Places a receiving request into the receiving queue.
The Receive() function places a completion token into the receive packet queue.
This function is always asynchronous.
The Token.Event field in the completion token must be filled in by the caller
and cannot be NULL. When the receive operation completes, the EFI IPv4 Protocol
driver updates the Token.Status and Token.Packet.RxData fields and the Token.Event
is signaled.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] Token Pointer to a token that is associated with the receive data descriptor.
@retval EFI_SUCCESS The receive completion token was cached.
@retval EFI_NOT_STARTED This EFI IPv4 Protocol instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP, RARP, etc.)
is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
- This is NULL.
- Token is NULL.
- Token.Event is NULL.
@retval EFI_OUT_OF_RESOURCES The receive completion token could not be queued due to a lack of system
resources (usually memory).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
The EFI IPv4 Protocol instance has been reset to startup defaults.
EFI_ACCESS_DENIED The receive completion token with the same Token.Event was already
in the receive queue.
@retval EFI_NOT_READY The receive request could not be queued because the receive queue is full.
@retval EFI_ICMP_ERROR An ICMP error packet was received.
**/
);
/**
Abort an asynchronous transmit or receive request.
The Cancel() function is used to abort a pending transmit or receive request.
If the token is in the transmit or receive request queues, after calling this
function, Token->Status will be set to EFI_ABORTED and then Token->Event will
be signaled. If the token is not in one of the queues, which usually means the
asynchronous operation has completed, this function will not signal the token
and EFI_NOT_FOUND is returned.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] Token Pointer to a token that has been issued by
EFI_IP4_PROTOCOL.Transmit() or
EFI_IP4_PROTOCOL.Receive(). If NULL, all pending
tokens are aborted. Type EFI_IP4_COMPLETION_TOKEN is
defined in EFI_IP4_PROTOCOL.Transmit().
@retval EFI_SUCCESS The asynchronous I/O request was aborted and
Token.->Event was signaled. When Token is NULL, all
pending requests were aborted and their events were signaled.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_NOT_FOUND When Token is not NULL, the asynchronous I/O request was
not found in the transmit or receive queue. It has either completed
or was not issued by Transmit() and Receive().
**/
);
/**
Polls for incoming data packets and processes outgoing data packets.
The Poll() function polls for incoming data packets and processes outgoing data
packets. Network drivers and applications can call the EFI_IP4_PROTOCOL.Poll()
function to increase the rate that data packets are moved between the communications
device and the transmit and receive queues.
In some systems the periodic timer event may not poll the underlying communications
incoming packets or dropping outgoing packets. Drivers and applications that are
experiencing packet loss should try calling the EFI_IP4_PROTOCOL.Poll() function
more often.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This EFI IPv4 Protocol instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
@retval EFI_NOT_READY No incoming or outgoing data is processed.
Consider increasing the polling rate.
**/
);
};
/**
Gets the current operational settings for this instance of the EFI IPv4 Protocol driver.
The GetModeData() function returns the current operational mode data for this
driver instance. The data fields in EFI_IP4_MODE_DATA are read only. This
function is used optionally to retrieve the operational mode data of underlying
networks or drivers.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[out] Ip4ModeData Pointer to the EFI IPv4 Protocol mode data structure.
@param[out] MnpConfigData Pointer to the managed network configuration data structure.
@param[out] SnpModeData Pointer to the simple network mode data structure.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_OUT_OF_RESOURCES The required mode data could not be allocated.
**/
)
{
return EFI_INVALID_PARAMETER;
}
if (Ip4ModeData != NULL) {
//
// IsStarted is "whether the EfiIp4Configure has been called".
// IsConfigured is "whether the station address has been configured"
//
Ip4ModeData->RouteCount = 0;
//
// return the current station address for this IP child. So,
// the user can get the default address through this. Some
// application wants to know it station address even it is
// using the default one, such as a ftp server.
//
if (Ip4ModeData->IsStarted) {
//
// Build a EFI route table for user from the internal route table.
//
return Status;
}
}
}
//
// Get fresh mode data from MNP, since underlying media status may change
//
return Status;
}
/**
Config the MNP parameter used by IP. The IP driver use one MNP
the promiscous receive according to whether there is IP child
enable that or not. If Force is FALSE, it will iterate through
all the IP children to check whether the promiscuous receive
setting has been changed. If it hasn't been changed, it won't
reconfigure the MNP. If Force is TRUE, the MNP is configured no
matter whether that is changed or not.
@param[in] IpSb The IP4 service instance that is to be changed.
@param[in] Force Force the configuration or not.
@retval EFI_SUCCESS The MNP is successfully configured/reconfigured.
@retval Others Configuration failed.
**/
)
{
if (!Force) {
//
// Iterate through the IP children to check whether promiscuous
// receive setting has been changed. Update the interface's receive
// filter also.
//
}
}
}
//
// If promiscuous receive isn't changed, it isn't necessary to reconfigure.
//
return EFI_SUCCESS;
}
}
//
// recover the original configuration if failed to set the configure.
//
}
return Status;
}
/**
The event handle for IP4 auto configuration. If IP is asked
to reconfigure the default address. The original default
interface and route table are removed as the default. If there
is active IP children using the default address, the interface
will remain valid until all the children have freed their
references. If IP is signalled when auto configuration is done,
it will configure the default interface and default route table
with the configuration information retrieved by IP4_CONFIGURE.
@param[in] Context The IP4 service binding instance.
**/
)
{
//
// IP is asked to do the reconfiguration. If the default interface
// has been configured, release the default interface and route
// table, then create a new one. If there are some IP children
// using it, the interface won't be physically freed until all the
// children have released their reference to it. Also remember to
// restart the receive on the default address. IP4 driver only receive
// frames on the default address, and when the default interface is
// freed, Ip4AcceptFrame won't be informed.
//
return;
}
if (RouteTable == NULL) {
return;
}
}
return ;
}
//
// Get the configure data in two steps: get the length then the data.
//
Len = 0;
return ;
}
return ;
}
goto ON_EXIT;
}
//
// If the default address has been configured don't change it.
// This is unlikely to happen if EFI_IP4_CONFIG protocol has
// informed us to reconfigure each time it wants to change the
// configuration parameters.
//
if (IpIf->Configured) {
goto ON_EXIT;
}
//
// Set the default interface's address, then add a directed
// route for it, that is, the route whose nexthop is zero.
//
goto ON_EXIT;
}
);
//
// Add routes returned by EFI_IP4_CONFIG protocol.
//
}
}
/**
Request Ip4AutoConfigCallBackDpc as a DPC at TPL_CALLBACK.
@param Event The event that is signalled.
@param Context The IP4 service binding instance.
**/
)
{
//
// Request Ip4AutoConfigCallBackDpc as a DPC at TPL_CALLBACK
//
}
/**
Start the auto configuration for this IP service instance.
It will locates the EFI_IP4_CONFIG_PROTOCOL, then start the
auto configuration.
@param[in] IpSb The IP4 service instance to configure
@retval EFI_SUCCESS The auto configuration is successfull started
@retval Others Failed to start auto configuration.
**/
)
{
return EFI_SUCCESS;
}
//
// Create the DoneEvent and ReconfigEvent to call EFI_IP4_CONFIG
//
IpSb,
);
return Status;
}
IpSb,
);
goto CLOSE_DONE_EVENT;
}
//
// Open the EFI_IP4_CONFIG protocol then start auto configure
//
);
goto CLOSE_RECONFIG_EVENT;
}
gBS->CloseProtocol (
);
goto CLOSE_RECONFIG_EVENT;
}
return Status;
return Status;
}
/**
Intiialize the IP4_PROTOCOL structure to the unconfigured states.
@param IpSb The IP4 service instance.
@param IpInstance The IP4 child instance.
**/
)
{
}
/**
Configure the IP4 child. If the child is already configured,
change the configuration parameter. Otherwise configure it
for the first time. The caller should validate the configuration
before deliver them to it. It also don't do configure NULL.
@param[in, out] IpInstance The IP4 child to configure.
@param[in] Config The configure data.
@retval EFI_SUCCESS The IP4 child is successfully configured.
@retval EFI_DEVICE_ERROR Failed to free the pending transive or to
configure underlying MNP or other errors.
@retval EFI_NO_MAPPING The IP4 child is configured to use default
address, but the default address hasn't been
configured. The IP4 child doesn't need to be
reconfigured when default address is configured.
@retval EFI_OUT_OF_RESOURCES No more memory space is available.
@retval other Other error occurs.
**/
)
{
//
// User is changing packet filters. It must be stopped
// before the station address can be changed.
//
//
//
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
//
// Configure a fresh IP4 protocol instance. Create a route table.
// Each IP child has its own route table, which may point to the
// default table if it is using default address.
//
return Status;
}
//
// Set up the interface.
//
if (!Config->UseDefaultAddress) {
//
// Find whether there is already an interface with the same
// station address. All the instances with the same station
// address shares one interface.
//
NET_GET_REF (IpIf);
} else {
goto ON_ERROR;
}
goto ON_ERROR;
}
}
//
// Add a route to this connected network in the route table
//
} else {
//
// Use the default address. If the default configuration hasn't
// been started, start it.
//
goto ON_ERROR;
}
}
//
// If default address is used, so is the default route table.
// Any route set by the instance has the precedence over the
// routes in the default route table. Link the default table
// after the instance's table. Routing will search the local
// table first.
//
}
//
// Although EFI_NO_MAPPING is an error code, the IP child has been
// successfully configured and doesn't need reconfiguration when
// default address is acquired.
//
return EFI_NO_MAPPING;
}
return EFI_SUCCESS;
return Status;
}
/**
Clean up the IP4 child, release all the resources used by it.
@param[in] IpInstance The IP4 child to clean up.
@retval EFI_SUCCESS The IP4 child is cleaned up
@retval EFI_DEVICE_ERROR Some resources failed to be released
**/
)
{
return EFI_DEVICE_ERROR;
}
return EFI_DEVICE_ERROR;
}
//
// Some packets haven't been recycled. It is because either the
// user forgets to recycle the packets, or because the callback
// hasn't been called. Just leave it alone.
//
;
}
}
}
}
IpInstance->EfiRouteCount = 0;
}
IpInstance->GroupCount = 0;
}
return EFI_SUCCESS;
}
/**
address. Only continuous netmasks are supported. and check
that StationAddress is a unicast address on the newtwork.
@param[in] Ip The IP address to validate
@param[in] Netmask The netmaks of the IP
**/
)
{
//
// Only support the station address with 0.0.0.0/0 to enable DHCP client.
//
if (Netmask == IP4_ALLZERO_ADDRESS) {
}
//
// Only support the continuous net masks
//
return FALSE;
}
//
// Station address can't be class D or class E address
//
return FALSE;
}
//
//
return FALSE;
}
return FALSE;
}
return TRUE;
}
/**
Assigns an IPv4 address and subnet mask to this EFI IPv4 Protocol driver instance.
The Configure() function is used to set, change, or reset the operational
parameters and filter settings for this EFI IPv4 Protocol instance. Until these
parameters have been set, no network traffic can be sent or received by this
instance. Once the parameters have been reset (by calling this function with
IpConfigData set to NULL), no more traffic can be sent or received until these
parameters have been set again. Each EFI IPv4 Protocol instance can be started
and stopped independently of each other by enabling or disabling their receive
filter settings with the Configure() function.
When IpConfigData.UseDefaultAddress is set to FALSE, the new station address will
be appended as an alias address into the addresses list in the EFI IPv4 Protocol
driver. While set to TRUE, Configure() will trigger the EFI_IP4_CONFIG_PROTOCOL
to retrieve the default IPv4 address if it is not available yet. Clients could
frequently call GetModeData() to check the status to ensure that the default IPv4
address is ready.
If operational parameters are reset or changed, any pending transmit and receive
requests will be cancelled. Their completion token status will be set to EFI_ABORTED
and their events will be signaled.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] IpConfigData Pointer to the EFI IPv4 Protocol configuration data structure.
@retval EFI_SUCCESS The driver instance was successfully opened.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
@retval EFI_UNSUPPORTED One or more of the following conditions is TRUE:
A configuration protocol (DHCP, BOOTP, RARP, etc.) could
not be located when clients choose to use the default IPv4
address. This EFI IPv4 Protocol implementation does not
support this requested filter or timeout setting.
@retval EFI_OUT_OF_RESOURCES The EFI IPv4 Protocol driver instance data could not be allocated.
@retval EFI_ALREADY_STARTED The interface is already open and must be stopped before the
IPv4 address or subnet mask can be changed. The interface must
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The EFI IPv4
Protocol driver instance is not opened.
**/
)
{
//
// First, validate the parameters
//
return EFI_INVALID_PARAMETER;
}
//
// Validate the configuration first.
//
if (IpConfigData != NULL) {
//
// This implementation doesn't support RawData
//
if (IpConfigData->RawData) {
goto ON_EXIT;
}
//
// Check whether the station address is a valid unicast address
//
if (!IpConfigData->UseDefaultAddress) {
if (!AddrOk) {
goto ON_EXIT;
}
}
//
// User can only update packet filters when already configured.
// If it wants to change the station address, it must configure(NULL)
// the instance first.
//
goto ON_EXIT;
}
if (!Current->UseDefaultAddress &&
goto ON_EXIT;
}
goto ON_EXIT;
}
}
}
//
// Configure the instance or clean it up.
//
if (IpConfigData != NULL) {
} else {
//
// Don't change the state if it is DESTORY, consider the following
// valid sequence: Mnp is unloaded-->Ip Stopped-->Udp Stopped,
// Configure (ThisIp, NULL). If the state is changed to UNCONFIGED,
// the unload fails miserably.
//
}
}
//
// Update the MNP's configure data. Ip4ServiceConfigMnp will check
// whether it is necessary to reconfigure the MNP.
//
//
// Update the variable data.
//
return Status;
}
/**
Change the IP4 child's multicast setting. The caller
should make sure that the parameters is valid.
@param[in] IpInstance The IP4 child to change the setting.
@param[in] JoinFlag TRUE to join the group, otherwise leave it
@param[in] GroupAddress The target group address
@retval EFI_ALREADY_STARTED Want to join the group, but already a member of it
@retval EFI_OUT_OF_RESOURCES Failed to allocate some resources.
@retval EFI_DEVICE_ERROR Failed to set the group configuraton
@retval EFI_SUCCESS Successfully updated the group setting.
@retval EFI_NOT_FOUND Try to leave the group which it isn't a member.
**/
)
{
//
// Add it to the instance's Groups, and join the group by IGMP.
// IpInstance->Groups is in network byte order. IGMP operates in
// host byte order
//
if (JoinFlag) {
//
// When JoinFlag is TRUE, GroupAddress shouldn't be NULL.
//
return EFI_ALREADY_STARTED;
}
}
return EFI_OUT_OF_RESOURCES;
}
return EFI_DEVICE_ERROR;
}
}
IpInstance->GroupCount++;
return EFI_SUCCESS;
}
//
// Leave the group. Leave all the groups if GroupAddress is NULL.
// Must iterate from the end to the beginning because the GroupCount
// is decreamented each time an address is removed..
//
return EFI_DEVICE_ERROR;
}
IpInstance->GroupCount--;
if (IpInstance->GroupCount == 0) {
}
if (GroupAddress != NULL) {
return EFI_SUCCESS;
}
}
}
}
/**
Joins and leaves multicast groups.
The Groups() function is used to join and leave multicast group sessions. Joining
a group will enable reception of matching multicast packets. Leaving a group will
disable the multicast packet reception.
If JoinFlag is FALSE and GroupAddress is NULL, all joined groups will be left.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] JoinFlag Set to TRUE to join the multicast group session and FALSE to leave.
@param[in] GroupAddress Pointer to the IPv4 multicast address.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_INVALID_PARAMETER One or more of the following is TRUE:
- This is NULL.
- JoinFlag is TRUE and GroupAddress is NULL.
- GroupAddress is not NULL and *GroupAddress is
not a multicast IPv4 address.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_OUT_OF_RESOURCES System resources could not be allocated.
@retval EFI_UNSUPPORTED This EFI IPv4 Protocol implementation does not support multicast groups.
@retval EFI_ALREADY_STARTED The group address is already in the group table (when
JoinFlag is TRUE).
@retval EFI_NOT_FOUND The group address is not in the group table (when JoinFlag is FALSE).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
**/
)
{
return EFI_INVALID_PARAMETER;
}
if (GroupAddress != NULL) {
return EFI_INVALID_PARAMETER;
}
}
goto ON_EXIT;
}
goto ON_EXIT;
}
return Status;
}
/**
Adds and deletes routing table entries.
The Routes() function adds a route to or deletes a route from the routing table.
Routes are determined by comparing the SubnetAddress with the destination IPv4
address arithmetically AND-ed with the SubnetMask. The gateway address must be
on the same subnet as the configured station address.
The default route is added with SubnetAddress and SubnetMask both set to 0.0.0.0.
The default route matches all destination IPv4 addresses that do not match any
other routes.
A GatewayAddress that is zero is a nonroute. Packets are sent to the destination
IP address if it can be found in the ARP cache or on the local subnet. One automatic
nonroute entry will be inserted into the routing table for outgoing packets that
are addressed to a local subnet (gateway address of 0.0.0.0).
Each EFI IPv4 Protocol instance has its own independent routing table. Those EFI
IPv4 Protocol instances that use the default IPv4 address will also have copies
of the routing table that was provided by the EFI_IP4_CONFIG_PROTOCOL, and these
copies will be updated whenever the EIF IPv4 Protocol driver reconfigures its
instances. As a result, client modification to the routing table will be lost.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] DeleteRoute Set to TRUE to delete this route from the routing table. Set to
FALSE to add this route to the routing table. SubnetAddress
and SubnetMask are used as the key to each route entry.
@param[in] SubnetAddress The address of the subnet that needs to be routed.
@param[in] SubnetMask The subnet mask of SubnetAddress.
@param[in] GatewayAddress The unicast gateway IPv4 address for this route.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_NOT_STARTED The driver instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
- This is NULL.
- SubnetAddress is NULL.
- SubnetMask is NULL.
- GatewayAddress is NULL.
- *SubnetAddress is not a valid subnet address.
- *SubnetMask is not a valid subnet mask.
- *GatewayAddress is not a valid unicast IPv4 address.
@retval EFI_OUT_OF_RESOURCES Could not add the entry to the routing table.
@retval EFI_NOT_FOUND This route is not in the routing table (when DeleteRoute is TRUE).
@retval EFI_ACCESS_DENIED The route is already defined in the routing table (when
DeleteRoute is FALSE).
**/
)
{
//
// First, validate the parameters
//
return EFI_INVALID_PARAMETER;
}
goto ON_EXIT;
}
goto ON_EXIT;
}
if (!IP4_IS_VALID_NETMASK (Netmask)) {
goto ON_EXIT;
}
//
// the gateway address must be a unicast on the connected network if not zero.
//
if ((Nexthop != IP4_ALLZERO_ADDRESS) &&
goto ON_EXIT;
}
if (DeleteRoute) {
} else {
}
return Status;
}
/**
Check whether the user's token or event has already
been enqueued on IP4's list.
@param[in] Map The container of either user's transmit or receive
token.
@param[in] Item Current item to check against
@param[in] Context The Token to check againist.
@retval EFI_ACCESS_DENIED The token or event has already been enqueued in IP
context.
**/
)
{
return EFI_ACCESS_DENIED;
}
return EFI_SUCCESS;
}
/**
Validate the user's token against current station address.
@param[in] Token User's token to validate
@param[in] IpIf The IP4 child's interface.
@retval EFI_INVALID_PARAMETER Some parameters are invalid
@retval EFI_SUCCESS The token is OK
**/
)
{
return EFI_INVALID_PARAMETER;
}
//
// Check the IP options: no more than 40 bytes and format is OK
//
if (TxData->OptionsLength != 0) {
return EFI_INVALID_PARAMETER;
}
return EFI_INVALID_PARAMETER;
}
}
//
// Check the fragment table: no empty fragment, and length isn't bogus
//
return EFI_INVALID_PARAMETER;
}
return EFI_INVALID_PARAMETER;
}
}
if (Offset != 0) {
return EFI_INVALID_PARAMETER;
}
//
// Check the source and gateway: they must be a valid unicast.
// Gateway must also be on the connected network.
//
(Src == IP4_ALLONE_ADDRESS) ||
return EFI_INVALID_PARAMETER;
}
//
// If gateway isn't zero, it must be a unicast address, and
// on the connected network.
//
if ((Gateway != IP4_ALLZERO_ADDRESS) &&
return EFI_INVALID_PARAMETER;
}
}
//
// Check the packet length: Head length and packet length all has a limit
//
if ((HeadLen > IP4_MAX_HEADLEN) ||
return EFI_BAD_BUFFER_SIZE;
}
return EFI_SUCCESS;
}
/**
The callback function for the net buffer which wraps the user's
transmit token. Although it seems this function is pretty simple,
there are some subtle things.
When user requests the IP to transmit a packet by passing it a
token, the token is wrapped in an IP4_TXTOKEN_WRAP and the data
is wrapped in an net buffer. the net buffer's Free function is
set to Ip4FreeTxToken. The Token and token wrap are added to the
IP child's TxToken map. Then the buffer is passed to Ip4Output for
transmission. If something error happened before that, the buffer
is freed, which in turn will free the token wrap. The wrap may
have been added to the TxToken map or not, and the user's event
shouldn't be fired because we are still in the EfiIp4Transmit. If
the buffer has been sent by Ip4Output, it should be removed from
the TxToken map and user's event signaled. The token wrap and buffer
are bound together. Check the comments in Ip4Output for information
about IP fragmentation.
@param[in] Context The token's wrap
**/
)
{
//
// Signal IpSecRecycleEvent to inform IPsec free the memory
//
}
//
// Find the token in the instance's map. EfiIp4Transmit put the
// token to the map. If that failed, NetMapFindKey will return NULL.
//
}
//
// Dispatch the DPC queued by the NotifyFunction of Token->Event.
//
DispatchDpc ();
}
}
/**
The callback function to Ip4Output to update the transmit status.
@param Ip4Instance The Ip4Instance that request the transmit.
@param Packet The user's transmit request
@param IoStatus The result of the transmission
@param Flag Not used during transmission
@param Context The token's wrap.
**/
)
{
//
// This is the transmission request from upper layer,
// not the IP4 driver itself.
//
//
// The first fragment of the packet has been sent. Update
// the token's status. That is, if fragmented, the transmit's
// status is the first fragment's status. The Wrap will be
// release when all the fragments are release. Check the comments
// in Ip4FreeTxToken and Ip4Output for information.
//
}
/**
Places outgoing data packets into the transmit queue.
The Transmit() function places a sending request in the transmit queue of this
EFI IPv4 Protocol instance. Whenever the packet in the token is sent out or some
errors occur, the event in the token will be signaled and the status is updated.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] Token Pointer to the transmit token.
@retval EFI_SUCCESS The data has been queued for transmission.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER One or more pameters are invalid.
@retval EFI_ACCESS_DENIED The transmit completion token with the same Token.Event
was already in the transmit queue.
@retval EFI_NOT_READY The completion token could not be queued because the transmit
queue is full.
@retval EFI_NOT_FOUND Not route is found to destination address.
@retval EFI_OUT_OF_RESOURCES Could not queue the transmit data.
@retval EFI_BUFFER_TOO_SMALL Token.Packet.TxData.TotalDataLength is too
short to transmit.
@retval EFI_BAD_BUFFER_SIZE The length of the IPv4 header + option length + total data length is
greater than MTU (or greater than the maximum packet size if
Token.Packet.TxData.OverrideData.
DoNotFragment is TRUE.)
**/
)
{
return EFI_INVALID_PARAMETER;
}
return EFI_NOT_STARTED;
}
goto ON_EXIT;
}
//
// make sure that token is properly formated
//
goto ON_EXIT;
}
//
// Check whether the token or signal already existed.
//
goto ON_EXIT;
}
//
// Build the IP header, need to fill in the Tos, TotalLen, Id,
// fragment, Ttl, protocol, Src, and Dst.
//
} else {
}
//
// If don't fragment and fragment needed, return error
//
goto ON_EXIT;
}
//
// OK, it survives all the validation check. Wrap the token in
// a IP4_TXTOKEN_WRAP and the data in a netbuf
//
goto ON_EXIT;
}
0,
);
goto ON_EXIT;
}
//
// NetbufFree will call Ip4FreeTxToken, which in turn will
// free the IP4_TXTOKEN_WRAP. Now, the token wrap hasn't been
// enqueued.
//
goto ON_EXIT;
}
//
// Mark the packet sent before output it. Mark it not sent again if the
// returned status is not EFI_SUCCESS;
//
IpSb,
&Head,
);
}
return Status;
}
/**
Places a receiving request into the receiving queue.
The Receive() function places a completion token into the receive packet queue.
This function is always asynchronous.
The Token.Event field in the completion token must be filled in by the caller
and cannot be NULL. When the receive operation completes, the EFI IPv4 Protocol
driver updates the Token.Status and Token.Packet.RxData fields and the Token.Event
is signaled.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] Token Pointer to a token that is associated with the receive data descriptor.
@retval EFI_SUCCESS The receive completion token was cached.
@retval EFI_NOT_STARTED This EFI IPv4 Protocol instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP, RARP, etc.)
is not finished yet.
@retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
- This is NULL.
- Token is NULL.
- Token.Event is NULL.
@retval EFI_OUT_OF_RESOURCES The receive completion token could not be queued due to a lack of system
resources (usually memory).
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
The EFI IPv4 Protocol instance has been reset to startup defaults.
EFI_ACCESS_DENIED The receive completion token with the same Token.Event was already
in the receive queue.
@retval EFI_NOT_READY The receive request could not be queued because the receive queue is full.
@retval EFI_ICMP_ERROR An ICMP error packet was received.
**/
)
{
//
// First validate the parameters
//
return EFI_INVALID_PARAMETER;
}
goto ON_EXIT;
}
//
// Check whether the toke is already on the receive queue.
//
goto ON_EXIT;
}
//
// Queue the token then check whether there is pending received packet.
//
goto ON_EXIT;
}
//
// Dispatch the DPC queued by the NotifyFunction of this instane's receive
// event.
//
DispatchDpc ();
return Status;
}
/**
Cancel the transmitted but not recycled packet. If a matching
token is found, it will call Ip4CancelPacket to cancel the
packet. Ip4CancelPacket will cancel all the fragments of the
packet. When all the fragments are freed, the IP4_TXTOKEN_WRAP
will be deleted from the Map, and user's event signalled.
Because Ip4CancelPacket and other functions are all called in
line, so, after Ip4CancelPacket returns, the Item has been freed.
@param[in] Map The IP4 child's transmit queue
@param[in] Item The current transmitted packet to test.
@param[in] Context The user's token to cancel.
@retval EFI_SUCCESS Continue to check the next Item.
@retval EFI_ABORTED The user's Token (Token != NULL) is cancelled.
**/
)
{
//
// Return EFI_SUCCESS to check the next item in the map if
// this one doesn't match.
//
return EFI_SUCCESS;
}
//
// Don't access the Item, Wrap and Token's members after this point.
// Item and wrap has been freed. And we no longer own the Token.
//
//
// If only one item is to be cancel, return EFI_ABORTED to stop
// iterating the map any more.
//
return EFI_ABORTED;
}
return EFI_SUCCESS;
}
/**
Cancel the receive request. This is quiet simple, because
it is only enqueued in our local receive map.
@param[in] Map The IP4 child's receive queue
@param[in] Item Current receive request to cancel.
@param[in] Context The user's token to cancel
@retval EFI_SUCCESS Continue to check the next receive request on the
queue.
@retval EFI_ABORTED The user's token (token != NULL) has been
cancelled.
**/
)
{
return EFI_SUCCESS;
}
return EFI_ABORTED;
}
return EFI_SUCCESS;
}
/**
@param[in] IpInstance The IP4 child
@param[in] Token The token to cancel. If NULL, all token will be
cancelled.
@retval EFI_SUCCESS The token is cancelled
@retval EFI_NOT_FOUND The token isn't found on either the
@retval EFI_DEVICE_ERROR Not all token is cancelled when Token is NULL.
**/
)
{
//
// First check the transmitted packet. Ip4CancelTxTokens returns
// EFI_ABORTED to mean that the token has been cancelled when
// token != NULL. So, return EFI_SUCCESS for this condition.
//
return EFI_SUCCESS;
}
return Status;
}
//
// Check the receive queue. Ip4CancelRxTokens also returns EFI_ABORT
// for Token!=NULL and it is cancelled.
//
//
// Dispatch the DPCs queued by the NotifyFunction of the canceled rx token's
// events.
//
DispatchDpc ();
return EFI_SUCCESS;
}
return Status;
}
//
// OK, if the Token is found when Token != NULL, the NetMapIterate
// will return EFI_ABORTED, which has been interrupted as EFI_SUCCESS.
//
return EFI_NOT_FOUND;
}
//
// If Token == NULL, cancel all the tokens. return error if no
// all of them are cancelled.
//
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
/**
Abort an asynchronous transmit or receive request.
The Cancel() function is used to abort a pending transmit or receive request.
If the token is in the transmit or receive request queues, after calling this
function, Token->Status will be set to EFI_ABORTED and then Token->Event will
be signaled. If the token is not in one of the queues, which usually means the
asynchronous operation has completed, this function will not signal the token
and EFI_NOT_FOUND is returned.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@param[in] Token Pointer to a token that has been issued by
EFI_IP4_PROTOCOL.Transmit() or
EFI_IP4_PROTOCOL.Receive(). If NULL, all pending
tokens are aborted. Type EFI_IP4_COMPLETION_TOKEN is
defined in EFI_IP4_PROTOCOL.Transmit().
@retval EFI_SUCCESS The asynchronous I/O request was aborted and
Token.->Event was signaled. When Token is NULL, all
pending requests were aborted and their events were signaled.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_NOT_STARTED This instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_NOT_FOUND When Token is not NULL, the asynchronous I/O request was
not found in the transmit or receive queue. It has either completed
or was not issued by Transmit() and Receive().
**/
)
{
return EFI_INVALID_PARAMETER;
}
goto ON_EXIT;
}
goto ON_EXIT;
}
return Status;
}
/**
Polls for incoming data packets and processes outgoing data packets.
The Poll() function polls for incoming data packets and processes outgoing data
packets. Network drivers and applications can call the EFI_IP4_PROTOCOL.Poll()
function to increase the rate that data packets are moved between the communications
device and the transmit and receive queues.
In some systems the periodic timer event may not poll the underlying communications
incoming packets or dropping outgoing packets. Drivers and applications that are
experiencing packet loss should try calling the EFI_IP4_PROTOCOL.Poll() function
more often.
@param[in] This Pointer to the EFI_IP4_PROTOCOL instance.
@retval EFI_SUCCESS Incoming or outgoing data was processed.
@retval EFI_NOT_STARTED This EFI IPv4 Protocol instance has not been started.
@retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,
RARP, etc.) is not finished yet.
@retval EFI_INVALID_PARAMETER This is NULL.
@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
@retval EFI_NOT_READY No incoming or outgoing data is processed.
Consider increasing the polling rate.
**/
)
{
return EFI_INVALID_PARAMETER;
}
return EFI_NOT_STARTED;
}
//
// Don't lock the Poll function to enable the deliver of
// the packet polled up.
//
}
/**
Decrease the life of the transmitted packets. If it is
decreased to zero, cancel the packet. This function is
called by Ip4PacketTimerTicking which time out both the
received-but-not-delivered and transmitted-but-not-recycle
packets.
@param[in] Map The IP4 child's transmit map.
@param[in] Item Current transmitted packet
@param[in] Context Not used.
@retval EFI_SUCCESS Always returns EFI_SUCCESS
**/
)
{
}
return EFI_SUCCESS;
}
/**
The heart beat timer of IP4 service instance. It times out
all of its IP4 children's received-but-not-delivered and
transmitted-but-not-recycle packets, and provides time input
for its IGMP protocol.
@param[in] Event The IP4 service instance's heart beat timer.
@param[in] Context The IP4 service instance.
**/
)
{
}