[mirror_edk2.git] / MdeModulePkg / Universal / Network / Ip4Dxe / Ip4If.h

/** @file\r
  Definition for IP4 pesudo interface structure.\r
\r
Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#ifndef __EFI_IP4_IF_H__\r
#define __EFI_IP4_IF_H__\r
\r
#define IP4_FRAME_RX_SIGNATURE  SIGNATURE_32 ('I', 'P', 'F', 'R')\r
#define IP4_FRAME_TX_SIGNATURE  SIGNATURE_32 ('I', 'P', 'F', 'T')\r
#define IP4_FRAME_ARP_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'A')\r
#define IP4_INTERFACE_SIGNATURE SIGNATURE_32 ('I', 'P', 'I', 'F')\r
\r
/**\r
  This prototype is used by both receive and transmission.\r
  When receiving Netbuf is allocated by IP4_INTERFACE, and\r
  released by IP4. Flag shows whether the frame is received\r
  as link broadcast/multicast...\r
\r
  When transmitting, the Netbuf is from IP4, and provided\r
  to the callback as a reference. Flag isn't used.\r
\r
  @param[in] IpInstance The instance that sent or received the packet.\r
                        IpInstance can be NULL which means that it is the IP4 driver\r
                        itself sending the packets. IP4 driver may send packets that\r
                        don't belong to any instance, such as ICMP errors, ICMP echo\r
                        responses, or IGMP packets. IpInstance is used as a tag in\r
                        this module.\r
  @param[in] Packet     The sent or received packet.\r
  @param[in] IoStatus   Status of sending or receiving.\r
  @param[in] LinkFlag   Indicate if the frame is received as link broadcast/multicast.\r
                        When transmitting, it is not used.\r
  @param[in] Context    Additional data for callback.\r
\r
  @retval None.\r
**/\r
typedef\r
VOID\r
(*IP4_FRAME_CALLBACK)(\r
  IN IP4_PROTOCOL              *IpInstance       OPTIONAL,\r
  IN NET_BUF                   *Packet,\r
  IN EFI_STATUS                IoStatus,\r
  IN UINT32                    LinkFlag,\r
  IN VOID                      *Context\r
  );\r
\r
///\r
/// Each receive request is wrapped in an IP4_LINK_RX_TOKEN.\r
/// Upon completion, the Callback will be called. Only one\r
/// receive request is send to MNP. IpInstance is always NULL.\r
/// Reference MNP's spec for information.\r
///\r
typedef struct {\r
  UINT32                                Signature;\r
  IP4_INTERFACE                         *Interface;\r
\r
  IP4_PROTOCOL                          *IpInstance;\r
  IP4_FRAME_CALLBACK                    CallBack;\r
  VOID                                  *Context;\r
\r
  EFI_MANAGED_NETWORK_COMPLETION_TOKEN  MnpToken;\r
} IP4_LINK_RX_TOKEN;\r
\r
///\r
/// Each transmit request is wrapped in an IP4_LINK_TX_TOKEN.\r
/// Upon completion, the Callback will be called.\r
///\r
typedef struct {\r
  UINT32                                Signature;\r
  LIST_ENTRY                            Link;\r
\r
  IP4_INTERFACE                         *Interface;\r
  IP4_SERVICE                           *IpSb;\r
\r
  IP4_PROTOCOL                          *IpInstance;\r
  IP4_FRAME_CALLBACK                    CallBack;\r
  NET_BUF                               *Packet;\r
  VOID                                  *Context;\r
\r
  EFI_MAC_ADDRESS                       DstMac;\r
  EFI_MAC_ADDRESS                       SrcMac;\r
\r
  EFI_MANAGED_NETWORK_COMPLETION_TOKEN  MnpToken;\r
  EFI_MANAGED_NETWORK_TRANSMIT_DATA     MnpTxData;\r
} IP4_LINK_TX_TOKEN;\r
\r
///\r
/// Only one ARP request is requested for all the frames in\r
/// a time. It is started for the first frames to the Ip. Any\r
/// subsequent transmission frame will be linked to Frames, and\r
/// be sent all at once the ARP requests succeed.\r
///\r
typedef struct {\r
  UINT32                  Signature;\r
  LIST_ENTRY              Link;\r
\r
  LIST_ENTRY              Frames;\r
  IP4_INTERFACE           *Interface;\r
\r
  //\r
  // ARP requesting staffs\r
  //\r
  EFI_EVENT               OnResolved;\r
  IP4_ADDR                Ip;\r
  EFI_MAC_ADDRESS         Mac;\r
} IP4_ARP_QUE;\r
\r
/**\r
  Callback to select which frame to cancel. Caller can cancel a\r
  single frame, or all the frame from an IP instance.\r
\r
  @param Frame      The sending frame to check for cancellation.\r
  @param Context    Additional data for callback.\r
\r
  @retval TRUE      The sending of the frame should be cancelled.\r
  @retval FALSE     Do not cancel the frame sending.\r
**/\r
typedef\r
BOOLEAN\r
(*IP4_FRAME_TO_CANCEL)(\r
  IP4_LINK_TX_TOKEN       *Frame,\r
  VOID                    *Context\r
  );\r
\r
//\r
// Each IP4 instance has its own station address. All the instances\r
// with the same station address share a single interface structure.\r
// Each interface has its own ARP child, and shares one MNP child.\r
// Notice the special cases that DHCP can configure the interface\r
// with 0.0.0.0/0.0.0.0.\r
//\r
struct _IP4_INTERFACE {\r
  UINT32                        Signature;\r
  LIST_ENTRY                    Link;\r
  INTN                          RefCnt;\r
\r
  //\r
  // IP address and subnet mask of the interface. It also contains\r
  // the subnet/net broadcast address for quick access. The fields\r
  // are invalid if (Configured == FALSE)\r
  //\r
  IP4_ADDR                      Ip;\r
  IP4_ADDR                      SubnetMask;\r
  IP4_ADDR                      SubnetBrdcast;\r
  IP4_ADDR                      NetBrdcast;\r
  BOOLEAN                       Configured;\r
\r
  //\r
  // Handle used to create/destroy ARP child. All the IP children\r
  // share one MNP which is owned by IP service binding.\r
  //\r
  EFI_HANDLE                    Controller;\r
  EFI_HANDLE                    Image;\r
\r
  EFI_MANAGED_NETWORK_PROTOCOL  *Mnp;\r
  EFI_ARP_PROTOCOL              *Arp;\r
  EFI_HANDLE                    ArpHandle;\r
\r
  //\r
  // Queues to keep the frames sent and waiting ARP request.\r
  //\r
  LIST_ENTRY                    ArpQues;\r
  LIST_ENTRY                    SentFrames;\r
  IP4_LINK_RX_TOKEN             *RecvRequest;\r
\r
  //\r
  // The interface's MAC and broadcast MAC address.\r
  //\r
  EFI_MAC_ADDRESS               Mac;\r
  EFI_MAC_ADDRESS               BroadcastMac;\r
  UINT32                        HwaddrLen;\r
\r
  //\r
  // All the IP instances that have the same IP/SubnetMask are linked\r
  // together through IpInstances. If any of the instance enables\r
  // promiscuous receive, PromiscRecv is true.\r
  //\r
  LIST_ENTRY                    IpInstances;\r
  BOOLEAN                       PromiscRecv;\r
};\r
\r
/**\r
  Create an IP4_INTERFACE. Delay the creation of ARP instance until\r
  the interface is configured.\r
\r
  @param[in]  Mnp               The shared MNP child of this IP4 service binding\r
                                instance.\r
  @param[in]  Controller        The controller this IP4 service binding instance\r
                                is installed. Most like the UNDI handle.\r
  @param[in]  ImageHandle       This driver's image handle.\r
\r
  @return Point to the created IP4_INTERFACE, otherwise NULL.\r
\r
**/\r
IP4_INTERFACE *\r
Ip4CreateInterface (\r
  IN  EFI_MANAGED_NETWORK_PROTOCOL  *Mnp,\r
  IN  EFI_HANDLE                    Controller,\r
  IN  EFI_HANDLE                    ImageHandle\r
  );\r
\r
/**\r
  Set the interface's address, create and configure\r
  the ARP child if necessary.\r
\r
  @param  Interface         The interface to set the address.\r
  @param  IpAddr            The interface's IP address.\r
  @param  SubnetMask        The interface's netmask.\r
\r
  @retval EFI_SUCCESS           The interface is configured with Ip/netmask pair,\r
                                and a ARP is created for it.\r
  @retval Others                Failed to set the interface's address.\r
\r
**/\r
EFI_STATUS\r
Ip4SetAddress (\r
  IN OUT IP4_INTERFACE      *Interface,\r
  IN     IP4_ADDR           IpAddr,\r
  IN     IP4_ADDR           SubnetMask\r
  );\r
\r
/**\r
  Free the interface used by IpInstance. All the IP instance with\r
  the same Ip/Netmask pair share the same interface. It is reference\r
  counted. All the frames haven't been sent will be cancelled.\r
  Because the IpInstance is optional, the caller must remove\r
  IpInstance from the interface's instance list itself.\r
\r
  @param[in]  Interface         The interface used by the IpInstance.\r
  @param[in]  IpInstance        The Ip instance that free the interface. NULL if\r
                                the Ip driver is releasing the default interface.\r
\r
  @retval EFI_SUCCESS           The interface use IpInstance is freed.\r
\r
**/\r
EFI_STATUS\r
Ip4FreeInterface (\r
  IN  IP4_INTERFACE         *Interface,\r
  IN  IP4_PROTOCOL          *IpInstance           OPTIONAL\r
  );\r
\r
/**\r
  Send a frame from the interface. If the next hop is broadcast or\r
  multicast address, it is transmitted immediately. If the next hop\r
  is a unicast, it will consult ARP to resolve the NextHop's MAC.\r
  If some error happened, the CallBack won't be called. So, the caller\r
  must test the return value, and take action when there is an error.\r
\r
  @param[in]  Interface         The interface to send the frame from\r
  @param[in]  IpInstance        The IP child that request the transmission.  NULL\r
                                if it is the IP4 driver itself.\r
  @param[in]  Packet            The packet to transmit.\r
  @param[in]  NextHop           The immediate destination to transmit the packet\r
                                to.\r
  @param[in]  CallBack          Function to call back when transmit finished.\r
  @param[in]  Context           Opaque parameter to the call back.\r
  @param[in]  IpSb              The pointer to the IP4 service binding instance.\r
\r
  @retval EFI_OUT_OF_RESOURCES  Failed to allocate resource to send the frame\r
  @retval EFI_NO_MAPPING        Can't resolve the MAC for the nexthop\r
  @retval EFI_SUCCESS           The packet is successfully transmitted.\r
  @retval other                 Other error occurs.\r
\r
**/\r
EFI_STATUS\r
Ip4SendFrame (\r
  IN  IP4_INTERFACE         *Interface,\r
  IN  IP4_PROTOCOL          *IpInstance       OPTIONAL,\r
  IN  NET_BUF               *Packet,\r
  IN  IP4_ADDR              NextHop,\r
  IN  IP4_FRAME_CALLBACK    CallBack,\r
  IN  VOID                  *Context,\r
  IN IP4_SERVICE            *IpSb\r
  );\r
\r
/**\r
  Remove all the frames on the interface that pass the FrameToCancel,\r
  either queued on ARP queues or that have already been delivered to\r
  MNP and not yet recycled.\r
\r
  @param[in]  Interface         Interface to remove the frames from.\r
  @param[in]  IoStatus          The transmit status returned to the frames'\r
                                callback.\r
  @param[in]  FrameToCancel     Function to select the frame to cancel, NULL to\r
                                select all.\r
  @param[in]  Context           Opaque parameters passed to FrameToCancel.\r
\r
**/\r
VOID\r
Ip4CancelFrames (\r
  IN IP4_INTERFACE          *Interface,\r
  IN EFI_STATUS             IoStatus,\r
  IN IP4_FRAME_TO_CANCEL    FrameToCancel    OPTIONAL,\r
  IN VOID                   *Context\r
  );\r
\r
/**\r
  If there is a pending receive request, cancel it. Don't call\r
  the receive request's callback because this function can be only\r
  called if the instance or driver is tearing itself down. It\r
  doesn't make sense to call it back. But it is necessary to call\r
  the transmit token's callback to give it a chance to free the\r
  packet and update the upper layer's transmit request status, say\r
  that from the UDP.\r
\r
  @param[in]  Interface         The interface used by the IpInstance\r
\r
**/\r
VOID\r
Ip4CancelReceive (\r
  IN IP4_INTERFACE          *Interface\r
  );\r
\r
/**\r
  Request to receive the packet from the interface.\r
\r
  @param[in]  Interface         The interface to receive the frames from.\r
  @param[in]  IpInstance        The instance that requests the receive. NULL for\r
                                the driver itself.\r
  @param[in]  CallBack          Function to call when receive finished.\r
  @param[in]  Context           Opaque parameter to the callback.\r
\r
  @retval EFI_ALREADY_STARTED   There is already a pending receive request.\r
  @retval EFI_OUT_OF_RESOURCES  Failed to allocate resource to receive.\r
  @retval EFI_SUCCESS           The recieve request has been started.\r
  @retval other                 Other error occurs.\r
\r
**/\r
EFI_STATUS\r
Ip4ReceiveFrame (\r
  IN  IP4_INTERFACE         *Interface,\r
  IN  IP4_PROTOCOL          *IpInstance       OPTIONAL,\r
  IN  IP4_FRAME_CALLBACK    CallBack,\r
  IN  VOID                  *Context\r
  );\r
\r
#endif\r
Commit	Line	Data
83cbd279	1	/** @file\r
3e8c18da	2	Definition for IP4 pesudo interface structure.\r
d1102dba LG	3	\r
d1102dba LG	4	Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r
9d510e61	5	SPDX-License-Identifier: BSD-2-Clause-Patent\r
83cbd279	6	\r
83cbd279	7	**/\r
	8	\r
	9	#ifndef __EFI_IP4_IF_H__\r
	10	#define __EFI_IP4_IF_H__\r
	11	\r
f6b7393c	12	#define IP4_FRAME_RX_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'R')\r
	13	#define IP4_FRAME_TX_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'T')\r
	14	#define IP4_FRAME_ARP_SIGNATURE SIGNATURE_32 ('I', 'P', 'F', 'A')\r
	15	#define IP4_INTERFACE_SIGNATURE SIGNATURE_32 ('I', 'P', 'I', 'F')\r
5405e9a6	16	\r
	17	/**\r
	18	This prototype is used by both receive and transmission.\r
	19	When receiving Netbuf is allocated by IP4_INTERFACE, and\r
	20	released by IP4. Flag shows whether the frame is received\r
	21	as link broadcast/multicast...\r
	22	\r
	23	When transmitting, the Netbuf is from IP4, and provided\r
	24	to the callback as a reference. Flag isn't used.\r
	25	\r
3e8c18da	26	@param[in] IpInstance The instance that sent or received the packet.\r
	27	IpInstance can be NULL which means that it is the IP4 driver\r
	28	itself sending the packets. IP4 driver may send packets that\r
	29	don't belong to any instance, such as ICMP errors, ICMP echo\r
	30	responses, or IGMP packets. IpInstance is used as a tag in\r
	31	this module.\r
	32	@param[in] Packet The sent or received packet.\r
	33	@param[in] IoStatus Status of sending or receiving.\r
	34	@param[in] LinkFlag Indicate if the frame is received as link broadcast/multicast.\r
	35	When transmitting, it is not used.\r
	36	@param[in] Context Additional data for callback.\r
	37	\r
	38	@retval None.\r
5405e9a6	39	**/\r
83cbd279	40	typedef\r
83cbd279	41	VOID\r
5405e9a6	42	(*IP4_FRAME_CALLBACK)(\r
3e8c18da	43	IN IP4_PROTOCOL *IpInstance OPTIONAL,\r
5405e9a6	44	IN NET_BUF *Packet,\r
	45	IN EFI_STATUS IoStatus,\r
	46	IN UINT32 LinkFlag,\r
	47	IN VOID *Context\r
83cbd279	48	);\r
83cbd279	49	\r
96e1079f	50	///\r
	51	/// Each receive request is wrapped in an IP4_LINK_RX_TOKEN.\r
	52	/// Upon completion, the Callback will be called. Only one\r
	53	/// receive request is send to MNP. IpInstance is always NULL.\r
	54	/// Reference MNP's spec for information.\r
	55	///\r
83cbd279	56	typedef struct {\r
	57	UINT32 Signature;\r
	58	IP4_INTERFACE *Interface;\r
	59	\r
	60	IP4_PROTOCOL *IpInstance;\r
	61	IP4_FRAME_CALLBACK CallBack;\r
	62	VOID *Context;\r
	63	\r
	64	EFI_MANAGED_NETWORK_COMPLETION_TOKEN MnpToken;\r
	65	} IP4_LINK_RX_TOKEN;\r
	66	\r
96e1079f	67	///\r
	68	/// Each transmit request is wrapped in an IP4_LINK_TX_TOKEN.\r
	69	/// Upon completion, the Callback will be called.\r
	70	///\r
83cbd279	71	typedef struct {\r
83cbd279	72	UINT32 Signature;\r
e48e37fc	73	LIST_ENTRY Link;\r
83cbd279	74	\r
83cbd279	75	IP4_INTERFACE *Interface;\r
12ae56cf	76	IP4_SERVICE *IpSb;\r
83cbd279	77	\r
	78	IP4_PROTOCOL *IpInstance;\r
	79	IP4_FRAME_CALLBACK CallBack;\r
	80	NET_BUF *Packet;\r
	81	VOID *Context;\r
	82	\r
	83	EFI_MAC_ADDRESS DstMac;\r
	84	EFI_MAC_ADDRESS SrcMac;\r
	85	\r
	86	EFI_MANAGED_NETWORK_COMPLETION_TOKEN MnpToken;\r
	87	EFI_MANAGED_NETWORK_TRANSMIT_DATA MnpTxData;\r
	88	} IP4_LINK_TX_TOKEN;\r
	89	\r
96e1079f	90	///\r
	91	/// Only one ARP request is requested for all the frames in\r
	92	/// a time. It is started for the first frames to the Ip. Any\r
	93	/// subsequent transmission frame will be linked to Frames, and\r
	94	/// be sent all at once the ARP requests succeed.\r
	95	///\r
83cbd279	96	typedef struct {\r
83cbd279	97	UINT32 Signature;\r
e48e37fc	98	LIST_ENTRY Link;\r
83cbd279	99	\r
e48e37fc	100	LIST_ENTRY Frames;\r
83cbd279	101	IP4_INTERFACE *Interface;\r
	102	\r
	103	//\r
	104	// ARP requesting staffs\r
	105	//\r
	106	EFI_EVENT OnResolved;\r
	107	IP4_ADDR Ip;\r
	108	EFI_MAC_ADDRESS Mac;\r
	109	} IP4_ARP_QUE;\r
	110	\r
5405e9a6	111	/**\r
	112	Callback to select which frame to cancel. Caller can cancel a\r
	113	single frame, or all the frame from an IP instance.\r
	114	\r
	115	@param Frame The sending frame to check for cancellation.\r
	116	@param Context Additional data for callback.\r
	117	\r
	118	@retval TRUE The sending of the frame should be cancelled.\r
	119	@retval FALSE Do not cancel the frame sending.\r
	120	**/\r
83cbd279	121	typedef\r
83cbd279	122	BOOLEAN\r
5405e9a6	123	(*IP4_FRAME_TO_CANCEL)(\r
83cbd279	124	IP4_LINK_TX_TOKEN *Frame,\r
	125	VOID *Context\r
	126	);\r
	127	\r
	128	//\r
	129	// Each IP4 instance has its own station address. All the instances\r
	130	// with the same station address share a single interface structure.\r
	131	// Each interface has its own ARP child, and shares one MNP child.\r
	132	// Notice the special cases that DHCP can configure the interface\r
	133	// with 0.0.0.0/0.0.0.0.\r
	134	//\r
c6bc765f	135	struct _IP4_INTERFACE {\r
83cbd279	136	UINT32 Signature;\r
e48e37fc	137	LIST_ENTRY Link;\r
83cbd279	138	INTN RefCnt;\r
	139	\r
	140	//\r
	141	// IP address and subnet mask of the interface. It also contains\r
2048c585	142	// the subnet/net broadcast address for quick access. The fields\r
83cbd279	143	// are invalid if (Configured == FALSE)\r
	144	//\r
	145	IP4_ADDR Ip;\r
	146	IP4_ADDR SubnetMask;\r
	147	IP4_ADDR SubnetBrdcast;\r
	148	IP4_ADDR NetBrdcast;\r
	149	BOOLEAN Configured;\r
	150	\r
	151	//\r
75dce340	152	// Handle used to create/destroy ARP child. All the IP children\r
83cbd279	153	// share one MNP which is owned by IP service binding.\r
	154	//\r
	155	EFI_HANDLE Controller;\r
	156	EFI_HANDLE Image;\r
	157	\r
	158	EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r
	159	EFI_ARP_PROTOCOL *Arp;\r
	160	EFI_HANDLE ArpHandle;\r
	161	\r
	162	//\r
	163	// Queues to keep the frames sent and waiting ARP request.\r
	164	//\r
e48e37fc	165	LIST_ENTRY ArpQues;\r
e48e37fc	166	LIST_ENTRY SentFrames;\r
83cbd279	167	IP4_LINK_RX_TOKEN *RecvRequest;\r
	168	\r
	169	//\r
	170	// The interface's MAC and broadcast MAC address.\r
	171	//\r
	172	EFI_MAC_ADDRESS Mac;\r
	173	EFI_MAC_ADDRESS BroadcastMac;\r
	174	UINT32 HwaddrLen;\r
	175	\r
	176	//\r
	177	// All the IP instances that have the same IP/SubnetMask are linked\r
	178	// together through IpInstances. If any of the instance enables\r
	179	// promiscuous receive, PromiscRecv is true.\r
	180	//\r
e48e37fc	181	LIST_ENTRY IpInstances;\r
83cbd279	182	BOOLEAN PromiscRecv;\r
c6bc765f	183	};\r
83cbd279	184	\r
2ff29212	185	/**\r
	186	Create an IP4_INTERFACE. Delay the creation of ARP instance until\r
	187	the interface is configured.\r
	188	\r
3e8c18da	189	@param[in] Mnp The shared MNP child of this IP4 service binding\r
1f6729ff	190	instance.\r
3e8c18da	191	@param[in] Controller The controller this IP4 service binding instance\r
2ff29212	192	is installed. Most like the UNDI handle.\r
1f6729ff	193	@param[in] ImageHandle This driver's image handle.\r
2ff29212	194	\r
	195	@return Point to the created IP4_INTERFACE, otherwise NULL.\r
	196	\r
	197	**/\r
83cbd279	198	IP4_INTERFACE *\r
	199	Ip4CreateInterface (\r
	200	IN EFI_MANAGED_NETWORK_PROTOCOL *Mnp,\r
	201	IN EFI_HANDLE Controller,\r
	202	IN EFI_HANDLE ImageHandle\r
	203	);\r
	204	\r
2ff29212	205	/**\r
	206	Set the interface's address, create and configure\r
	207	the ARP child if necessary.\r
	208	\r
1f6729ff	209	@param Interface The interface to set the address.\r
	210	@param IpAddr The interface's IP address.\r
	211	@param SubnetMask The interface's netmask.\r
2ff29212	212	\r
	213	@retval EFI_SUCCESS The interface is configured with Ip/netmask pair,\r
	214	and a ARP is created for it.\r
	215	@retval Others Failed to set the interface's address.\r
	216	\r
	217	**/\r
83cbd279	218	EFI_STATUS\r
83cbd279	219	Ip4SetAddress (\r
2ff29212	220	IN OUT IP4_INTERFACE *Interface,\r
	221	IN IP4_ADDR IpAddr,\r
	222	IN IP4_ADDR SubnetMask\r
83cbd279	223	);\r
83cbd279	224	\r
2ff29212	225	/**\r
	226	Free the interface used by IpInstance. All the IP instance with\r
	227	the same Ip/Netmask pair share the same interface. It is reference\r
	228	counted. All the frames haven't been sent will be cancelled.\r
	229	Because the IpInstance is optional, the caller must remove\r
	230	IpInstance from the interface's instance list itself.\r
	231	\r
1f6729ff	232	@param[in] Interface The interface used by the IpInstance.\r
3e8c18da	233	@param[in] IpInstance The Ip instance that free the interface. NULL if\r
2ff29212	234	the Ip driver is releasing the default interface.\r
	235	\r
	236	@retval EFI_SUCCESS The interface use IpInstance is freed.\r
	237	\r
	238	**/\r
83cbd279	239	EFI_STATUS\r
	240	Ip4FreeInterface (\r
	241	IN IP4_INTERFACE *Interface,\r
2ff29212	242	IN IP4_PROTOCOL *IpInstance OPTIONAL\r
83cbd279	243	);\r
83cbd279	244	\r
2ff29212	245	/**\r
	246	Send a frame from the interface. If the next hop is broadcast or\r
	247	multicast address, it is transmitted immediately. If the next hop\r
	248	is a unicast, it will consult ARP to resolve the NextHop's MAC.\r
	249	If some error happened, the CallBack won't be called. So, the caller\r
	250	must test the return value, and take action when there is an error.\r
	251	\r
3e8c18da	252	@param[in] Interface The interface to send the frame from\r
3e8c18da	253	@param[in] IpInstance The IP child that request the transmission. NULL\r
2ff29212	254	if it is the IP4 driver itself.\r
3e8c18da	255	@param[in] Packet The packet to transmit.\r
3e8c18da	256	@param[in] NextHop The immediate destination to transmit the packet\r
2ff29212	257	to.\r
3e8c18da	258	@param[in] CallBack Function to call back when transmit finished.\r
3e8c18da	259	@param[in] Context Opaque parameter to the call back.\r
12ae56cf	260	@param[in] IpSb The pointer to the IP4 service binding instance.\r
2ff29212	261	\r
	262	@retval EFI_OUT_OF_RESOURCES Failed to allocate resource to send the frame\r
	263	@retval EFI_NO_MAPPING Can't resolve the MAC for the nexthop\r
	264	@retval EFI_SUCCESS The packet is successfully transmitted.\r
	265	@retval other Other error occurs.\r
	266	\r
	267	**/\r
83cbd279	268	EFI_STATUS\r
	269	Ip4SendFrame (\r
	270	IN IP4_INTERFACE *Interface,\r
24af132f	271	IN IP4_PROTOCOL *IpInstance OPTIONAL,\r
83cbd279	272	IN NET_BUF *Packet,\r
	273	IN IP4_ADDR NextHop,\r
	274	IN IP4_FRAME_CALLBACK CallBack,\r
12ae56cf FS	275	IN VOID *Context,\r
12ae56cf FS	276	IN IP4_SERVICE *IpSb\r
83cbd279	277	);\r
83cbd279	278	\r
2ff29212	279	/**\r
	280	Remove all the frames on the interface that pass the FrameToCancel,\r
	281	either queued on ARP queues or that have already been delivered to\r
	282	MNP and not yet recycled.\r
	283	\r
1f6729ff	284	@param[in] Interface Interface to remove the frames from.\r
3e8c18da	285	@param[in] IoStatus The transmit status returned to the frames'\r
1f6729ff	286	callback.\r
3e8c18da	287	@param[in] FrameToCancel Function to select the frame to cancel, NULL to\r
1f6729ff	288	select all.\r
1f6729ff	289	@param[in] Context Opaque parameters passed to FrameToCancel.\r
2ff29212	290	\r
2ff29212	291	**/\r
83cbd279	292	VOID\r
	293	Ip4CancelFrames (\r
	294	IN IP4_INTERFACE *Interface,\r
	295	IN EFI_STATUS IoStatus,\r
24af132f	296	IN IP4_FRAME_TO_CANCEL FrameToCancel OPTIONAL,\r
83cbd279	297	IN VOID *Context\r
	298	);\r
	299	\r
2ff29212	300	/**\r
	301	If there is a pending receive request, cancel it. Don't call\r
	302	the receive request's callback because this function can be only\r
	303	called if the instance or driver is tearing itself down. It\r
	304	doesn't make sense to call it back. But it is necessary to call\r
	305	the transmit token's callback to give it a chance to free the\r
	306	packet and update the upper layer's transmit request status, say\r
	307	that from the UDP.\r
	308	\r
3e8c18da	309	@param[in] Interface The interface used by the IpInstance\r
2ff29212	310	\r
2ff29212	311	**/\r
83cbd279	312	VOID\r
	313	Ip4CancelReceive (\r
	314	IN IP4_INTERFACE *Interface\r
	315	);\r
	316	\r
2ff29212	317	/**\r
	318	Request to receive the packet from the interface.\r
	319	\r
1f6729ff	320	@param[in] Interface The interface to receive the frames from.\r
3e8c18da	321	@param[in] IpInstance The instance that requests the receive. NULL for\r
2ff29212	322	the driver itself.\r
3e8c18da	323	@param[in] CallBack Function to call when receive finished.\r
1f6729ff	324	@param[in] Context Opaque parameter to the callback.\r
2ff29212	325	\r
2ff29212	326	@retval EFI_ALREADY_STARTED There is already a pending receive request.\r
1f6729ff	327	@retval EFI_OUT_OF_RESOURCES Failed to allocate resource to receive.\r
2ff29212	328	@retval EFI_SUCCESS The recieve request has been started.\r
	329	@retval other Other error occurs.\r
	330	\r
	331	**/\r
83cbd279	332	EFI_STATUS\r
	333	Ip4ReceiveFrame (\r
	334	IN IP4_INTERFACE *Interface,\r
24af132f	335	IN IP4_PROTOCOL *IpInstance OPTIONAL,\r
83cbd279	336	IN IP4_FRAME_CALLBACK CallBack,\r
	337	IN VOID *Context\r
	338	);\r
	339	\r
	340	#endif\r