1 /** @file
2   This file defines the EFI IPv6 (Internet Protocol version 6)
3   Protocol interface. It is split into the following three main
4   sections:
5   - EFI IPv6 Service Binding Protocol
6   - EFI IPv6 Variable (deprecated in UEFI 2.4B)
7   - EFI IPv6 Protocol
8   The EFI IPv6 Protocol provides basic network IPv6 packet I/O services,
9   which includes support for Neighbor Discovery Protocol (ND), Multicast
10   Listener Discovery Protocol (MLD), and a subset of the Internet Control
11   Message Protocol (ICMPv6).
12 
13   Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.<BR>
14   SPDX-License-Identifier: BSD-2-Clause-Patent
15 
16   @par Revision Reference:
17   This Protocol is introduced in UEFI Specification 2.2
18 
19 **/
20 
21 #ifndef __EFI_IP6_PROTOCOL_H__
22 #define __EFI_IP6_PROTOCOL_H__
23 
24 #include <Protocol/ManagedNetwork.h>
25 
26 #define EFI_IP6_SERVICE_BINDING_PROTOCOL_GUID \
27   { \
28     0xec835dd3, 0xfe0f, 0x617b, {0xa6, 0x21, 0xb3, 0x50, 0xc3, 0xe1, 0x33, 0x88 } \
29   }
30 
31 #define EFI_IP6_PROTOCOL_GUID \
32   { \
33     0x2c8759d5, 0x5c2d, 0x66ef, {0x92, 0x5f, 0xb6, 0x6c, 0x10, 0x19, 0x57, 0xe2 } \
34   }
35 
36 typedef struct _EFI_IP6_PROTOCOL EFI_IP6_PROTOCOL;
37 
38 ///
39 /// EFI_IP6_ADDRESS_PAIR is deprecated in the UEFI 2.4B and should not be used any more.
40 /// The definition in here is only present to provide backwards compatability.
41 ///
42 typedef struct {
43   ///
44   /// The EFI IPv6 Protocol instance handle that is using this address/prefix pair.
45   ///
46   EFI_HANDLE          InstanceHandle;
47   ///
48   /// IPv6 address in network byte order.
49   ///
50   EFI_IPv6_ADDRESS    Ip6Address;
51   ///
52   /// The length of the prefix associated with the Ip6Address.
53   ///
54   UINT8               PrefixLength;
55 } EFI_IP6_ADDRESS_PAIR;
56 
57 ///
58 /// EFI_IP6_VARIABLE_DATA is deprecated in the UEFI 2.4B and should not be used any more.
59 /// The definition in here is only present to provide backwards compatability.
60 ///
61 typedef struct {
62   ///
63   /// The handle of the driver that creates this entry.
64   ///
65   EFI_HANDLE              DriverHandle;
66   ///
67   /// The number of IPv6 address pairs that follow this data structure.
68   ///
69   UINT32                  AddressCount;
70   ///
71   /// List of IPv6 address pairs that are currently in use.
72   ///
73   EFI_IP6_ADDRESS_PAIR    AddressPairs[1];
74 } EFI_IP6_VARIABLE_DATA;
75 
76 ///
77 /// ICMPv6 type definitions for error messages
78 ///
79 ///@{
80 #define ICMP_V6_DEST_UNREACHABLE   0x1
81 #define ICMP_V6_PACKET_TOO_BIG     0x2
82 #define ICMP_V6_TIME_EXCEEDED      0x3
83 #define ICMP_V6_PARAMETER_PROBLEM  0x4
84 ///@}
85 
86 ///
87 /// ICMPv6 type definition for informational messages
88 ///
89 ///@{
90 #define ICMP_V6_ECHO_REQUEST        0x80
91 #define ICMP_V6_ECHO_REPLY          0x81
92 #define ICMP_V6_LISTENER_QUERY      0x82
93 #define ICMP_V6_LISTENER_REPORT     0x83
94 #define ICMP_V6_LISTENER_DONE       0x84
95 #define ICMP_V6_ROUTER_SOLICIT      0x85
96 #define ICMP_V6_ROUTER_ADVERTISE    0x86
97 #define ICMP_V6_NEIGHBOR_SOLICIT    0x87
98 #define ICMP_V6_NEIGHBOR_ADVERTISE  0x88
99 #define ICMP_V6_REDIRECT            0x89
100 #define ICMP_V6_LISTENER_REPORT_2   0x8F
101 ///@}
102 
103 ///
104 /// ICMPv6 code definitions for ICMP_V6_DEST_UNREACHABLE
105 ///
106 ///@{
107 #define ICMP_V6_NO_ROUTE_TO_DEST    0x0
108 #define ICMP_V6_COMM_PROHIBITED     0x1
109 #define ICMP_V6_BEYOND_SCOPE        0x2
110 #define ICMP_V6_ADDR_UNREACHABLE    0x3
111 #define ICMP_V6_PORT_UNREACHABLE    0x4
112 #define ICMP_V6_SOURCE_ADDR_FAILED  0x5
113 #define ICMP_V6_ROUTE_REJECTED      0x6
114 ///@}
115 
116 ///
117 /// ICMPv6 code definitions for ICMP_V6_TIME_EXCEEDED
118 ///
119 ///@{
120 #define ICMP_V6_TIMEOUT_HOP_LIMIT   0x0
121 #define ICMP_V6_TIMEOUT_REASSEMBLE  0x1
122 ///@}
123 
124 ///
125 /// ICMPv6 code definitions for ICMP_V6_PARAMETER_PROBLEM
126 ///
127 ///@{
128 #define ICMP_V6_ERRONEOUS_HEADER      0x0
129 #define ICMP_V6_UNRECOGNIZE_NEXT_HDR  0x1
130 #define ICMP_V6_UNRECOGNIZE_OPTION    0x2
131 ///@}
132 
133 ///
134 /// EFI_IP6_CONFIG_DATA
135 /// is used to report and change IPv6 session parameters.
136 ///
137 typedef struct {
138   ///
139   /// For the IPv6 packet to send and receive, this is the default value
140   /// of the 'Next Header' field in the last IPv6 extension header or in
141   /// the IPv6 header if there are no extension headers. Ignored when
142   /// AcceptPromiscuous is TRUE.
143   ///
144   UINT8               DefaultProtocol;
145   ///
146   /// Set to TRUE to receive all IPv6 packets that get through the
147   /// receive filters.
148   /// Set to FALSE to receive only the DefaultProtocol IPv6
149   /// packets that get through the receive filters. Ignored when
150   /// AcceptPromiscuous is TRUE.
151   ///
152   BOOLEAN             AcceptAnyProtocol;
153   ///
154   /// Set to TRUE to receive ICMP error report packets. Ignored when
155   /// AcceptPromiscuous or AcceptAnyProtocol is TRUE.
156   ///
157   BOOLEAN             AcceptIcmpErrors;
158   ///
159   /// Set to TRUE to receive all IPv6 packets that are sent to any
160   /// hardware address or any protocol address. Set to FALSE to stop
161   /// receiving all promiscuous IPv6 packets.
162   ///
163   BOOLEAN             AcceptPromiscuous;
164   ///
165   /// The destination address of the packets that will be transmitted.
166   /// Ignored if it is unspecified.
167   ///
168   EFI_IPv6_ADDRESS    DestinationAddress;
169   ///
170   /// The station IPv6 address that will be assigned to this EFI IPv6
171   /// Protocol instance. This field can be set and changed only when
172   /// the EFI IPv6 driver is transitioning from the stopped to the started
173   /// states. If the StationAddress is specified, the EFI IPv6 Protocol
174   /// driver will deliver only incoming IPv6 packets whose destination
175   /// matches this IPv6 address exactly. The StationAddress is required
176   /// to be one of currently configured IPv6 addresses. An address
177   /// containing all zeroes is also accepted as a special case. Under this
178   /// situation, the IPv6 driver is responsible for binding a source
179   /// address to this EFI IPv6 protocol instance according to the source
180   /// address selection algorithm. Only incoming packets destined to
181   /// the selected address will be delivered to the user.  And the
182   /// selected station address can be retrieved through later
183   /// GetModeData() call. If no address is available for selecting,
184   /// EFI_NO_MAPPING will be returned, and the station address will
185   /// only be successfully bound to this EFI IPv6 protocol instance
186   /// after IP6ModeData.IsConfigured changed to TRUE.
187   ///
188   EFI_IPv6_ADDRESS    StationAddress;
189   ///
190   /// TrafficClass field in transmitted IPv6 packets. Default value
191   /// is zero.
192   ///
193   UINT8               TrafficClass;
194   ///
195   /// HopLimit field in transmitted IPv6 packets.
196   ///
197   UINT8               HopLimit;
198   ///
199   /// FlowLabel field in transmitted IPv6 packets. Default value is
200   /// zero.
201   ///
202   UINT32              FlowLabel;
203   ///
204   /// The timer timeout value (number of microseconds) for the
205   /// receive timeout event to be associated with each assembled
206   /// packet. Zero means do not drop assembled packets.
207   ///
208   UINT32              ReceiveTimeout;
209   ///
210   /// The timer timeout value (number of microseconds) for the
211   /// transmit timeout event to be associated with each outgoing
212   /// packet. Zero means do not drop outgoing packets.
213   ///
214   UINT32              TransmitTimeout;
215 } EFI_IP6_CONFIG_DATA;
216 
217 ///
218 /// EFI_IP6_ADDRESS_INFO
219 ///
220 typedef struct {
221   EFI_IPv6_ADDRESS    Address;           ///< The IPv6 address.
222   UINT8               PrefixLength;      ///< The length of the prefix associated with the Address.
223 } EFI_IP6_ADDRESS_INFO;
224 
225 ///
226 /// EFI_IP6_ROUTE_TABLE
227 /// is the entry structure that is used in routing tables
228 ///
229 typedef struct {
230   ///
231   /// The IPv6 address of the gateway to be used as the next hop for
232   /// packets to this prefix. If the IPv6 address is all zeros, then the
233   /// prefix is on-link.
234   ///
235   EFI_IPv6_ADDRESS    Gateway;
236   ///
237   /// The destination prefix to be routed.
238   ///
239   EFI_IPv6_ADDRESS    Destination;
240   ///
241   /// The length of the prefix associated with the Destination.
242   ///
243   UINT8               PrefixLength;
244 } EFI_IP6_ROUTE_TABLE;
245 
246 ///
247 /// EFI_IP6_NEIGHBOR_STATE
248 ///
249 typedef enum {
250   ///
251   /// Address resolution is being performed on this entry. Specially,
252   /// Neighbor Solicitation has been sent to the solicited-node
253   /// multicast address of the target, but corresponding Neighbor
254   /// Advertisement has not been received.
255   ///
256   EfiNeighborInComplete,
257   ///
258   /// Positive confirmation was received that the forward path to the
259   /// neighbor was functioning properly.
260   ///
261   EfiNeighborReachable,
262   ///
263   /// Reachable Time has elapsed since the last positive confirmation
264   /// was received. In this state, the forward path to the neighbor was
265   /// functioning properly.
266   ///
267   EfiNeighborStale,
268   ///
269   /// This state is an optimization that gives upper-layer protocols
270   /// additional time to provide reachability confirmation.
271   ///
272   EfiNeighborDelay,
273   ///
274   /// A reachability confirmation is actively sought by retransmitting
275   /// Neighbor Solicitations every RetransTimer milliseconds until a
276   /// reachability confirmation is received.
277   ///
278   EfiNeighborProbe
279 } EFI_IP6_NEIGHBOR_STATE;
280 
281 ///
282 /// EFI_IP6_NEIGHBOR_CACHE
283 /// is the entry structure that is used in neighbor cache. It records a set
284 /// of entries about individual neighbors to which traffic has been sent recently.
285 ///
286 typedef struct {
287   EFI_IPv6_ADDRESS          Neighbor;    ///< The on-link unicast/anycast IP address of the neighbor.
288   EFI_MAC_ADDRESS           LinkAddress; ///< Link-layer address of the neighbor.
289   EFI_IP6_NEIGHBOR_STATE    State;       ///< State of this neighbor cache entry.
290 } EFI_IP6_NEIGHBOR_CACHE;
291 
292 ///
293 /// EFI_IP6_ICMP_TYPE
294 /// is used to describe those ICMP messages that are supported by this EFI
295 /// IPv6 Protocol driver.
296 ///
297 typedef struct {
298   UINT8    Type;                  ///< The type of ICMP message.
299   UINT8    Code;                  ///< The code of the ICMP message.
300 } EFI_IP6_ICMP_TYPE;
301 
302 ///
303 /// EFI_IP6_MODE_DATA
304 ///
305 typedef struct {
306   ///
307   /// Set to TRUE after this EFI IPv6 Protocol instance is started.
308   /// All other fields in this structure are undefined until this field is TRUE.
309   /// Set to FALSE when the EFI IPv6 Protocol instance is stopped.
310   ///
311   BOOLEAN                   IsStarted;
312   ///
313   /// The maximum packet size, in bytes, of the packet which the upper layer driver could feed.
314   ///
315   UINT32                    MaxPacketSize;
316   ///
317   /// Current configuration settings. Undefined until IsStarted is TRUE.
318   ///
319   EFI_IP6_CONFIG_DATA       ConfigData;
320   ///
321   /// Set to TRUE when the EFI IPv6 Protocol instance is configured.
322   /// The instance is configured when it has a station address and
323   /// corresponding prefix length.
324   /// Set to FALSE when the EFI IPv6 Protocol instance is not configured.
325   ///
326   BOOLEAN                   IsConfigured;
327   ///
328   /// Number of configured IPv6 addresses on this interface.
329   ///
330   UINT32                    AddressCount;
331   ///
332   /// List of currently configured IPv6 addresses and corresponding
333   /// prefix lengths assigned to this interface. It is caller's
334   /// responsibility to free this buffer.
335   ///
336   EFI_IP6_ADDRESS_INFO      *AddressList;
337   ///
338   /// Number of joined multicast groups. Undefined until
339   /// IsConfigured is TRUE.
340   ///
341   UINT32                    GroupCount;
342   ///
343   /// List of joined multicast group addresses. It is caller's
344   /// responsibility to free this buffer. Undefined until
345   /// IsConfigured is TRUE.
346   ///
347   EFI_IPv6_ADDRESS          *GroupTable;
348   ///
349   /// Number of entries in the routing table. Undefined until
350   /// IsConfigured is TRUE.
351   ///
352   UINT32                    RouteCount;
353   ///
354   /// Routing table entries. It is caller's responsibility to free this buffer.
355   ///
356   EFI_IP6_ROUTE_TABLE       *RouteTable;
357   ///
358   /// Number of entries in the neighbor cache. Undefined until
359   /// IsConfigured is TRUE.
360   ///
361   UINT32                    NeighborCount;
362   ///
363   /// Neighbor cache entries. It is caller's responsibility to free this
364   /// buffer. Undefined until IsConfigured is TRUE.
365   ///
366   EFI_IP6_NEIGHBOR_CACHE    *NeighborCache;
367   ///
368   /// Number of entries in the prefix table. Undefined until
369   /// IsConfigured is TRUE.
370   ///
371   UINT32                    PrefixCount;
372   ///
373   /// On-link Prefix table entries. It is caller's responsibility to free this
374   /// buffer. Undefined until IsConfigured is TRUE.
375   ///
376   EFI_IP6_ADDRESS_INFO      *PrefixTable;
377   ///
378   /// Number of entries in the supported ICMP types list.
379   ///
380   UINT32                    IcmpTypeCount;
381   ///
382   /// Array of ICMP types and codes that are supported by this EFI
383   /// IPv6 Protocol driver. It is caller's responsibility to free this
384   /// buffer.
385   ///
386   EFI_IP6_ICMP_TYPE         *IcmpTypeList;
387 } EFI_IP6_MODE_DATA;
388 
389 ///
390 /// EFI_IP6_HEADER
391 /// The fields in the IPv6 header structure are defined in the Internet
392 /// Protocol version6 specification.
393 ///
394 #pragma pack(1)
395 typedef struct _EFI_IP6_HEADER {
396   UINT8               TrafficClassH : 4;
397   UINT8               Version       : 4;
398   UINT8               FlowLabelH    : 4;
399   UINT8               TrafficClassL : 4;
400   UINT16              FlowLabelL;
401   UINT16              PayloadLength;
402   UINT8               NextHeader;
403   UINT8               HopLimit;
404   EFI_IPv6_ADDRESS    SourceAddress;
405   EFI_IPv6_ADDRESS    DestinationAddress;
406 } EFI_IP6_HEADER;
407 #pragma pack()
408 
409 ///
410 /// EFI_IP6_FRAGMENT_DATA
411 /// describes the location and length of the IPv6 packet
412 /// fragment to transmit or that has been received.
413 ///
414 typedef struct _EFI_IP6_FRAGMENT_DATA {
415   UINT32    FragmentLength;                ///< Length of fragment data. This field may not be set to zero.
416   VOID      *FragmentBuffer;               ///< Pointer to fragment data. This field may not be set to NULL.
417 } EFI_IP6_FRAGMENT_DATA;
418 
419 ///
420 /// EFI_IP6_RECEIVE_DATA
421 ///
422 typedef struct _EFI_IP6_RECEIVE_DATA {
423   ///
424   /// Time when the EFI IPv6 Protocol driver accepted the packet.
425   /// Ignored if it is zero.
426   ///
427   EFI_TIME                 TimeStamp;
428   ///
429   /// After this event is signaled, the receive data structure is released
430   /// and must not be referenced.
431   ///
432   EFI_EVENT                RecycleSignal;
433   ///
434   /// Length of the IPv6 packet headers, including both the IPv6
435   /// header and any extension headers.
436   ///
437   UINT32                   HeaderLength;
438   ///
439   /// Pointer to the IPv6 packet header. If the IPv6 packet was
440   /// fragmented, this argument is a pointer to the header in the first
441   /// fragment.
442   ///
443   EFI_IP6_HEADER           *Header;
444   ///
445   /// Sum of the lengths of IPv6 packet buffers in FragmentTable. May
446   /// be zero.
447   ///
448   UINT32                   DataLength;
449   ///
450   /// Number of IPv6 payload fragments. May be zero.
451   ///
452   UINT32                   FragmentCount;
453   ///
454   /// Array of payload fragment lengths and buffer pointers.
455   ///
456   EFI_IP6_FRAGMENT_DATA    FragmentTable[1];
457 } EFI_IP6_RECEIVE_DATA;
458 
459 ///
460 /// EFI_IP6_OVERRIDE_DATA
461 /// The information and flags in the override data structure will override
462 /// default parameters or settings for one Transmit() function call.
463 ///
464 typedef struct _EFI_IP6_OVERRIDE_DATA {
465   UINT8     Protocol;                 ///< Protocol type override.
466   UINT8     HopLimit;                 ///< Hop-Limit override.
467   UINT32    FlowLabel;                ///< Flow-Label override.
468 } EFI_IP6_OVERRIDE_DATA;
469 
470 ///
471 /// EFI_IP6_TRANSMIT_DATA
472 ///
473 typedef struct _EFI_IP6_TRANSMIT_DATA {
474   ///
475   /// The destination IPv6 address.  If it is unspecified,
476   /// ConfigData.DestinationAddress will be used instead.
477   ///
478   EFI_IPv6_ADDRESS         DestinationAddress;
479   ///
480   /// If not NULL, the IPv6 transmission control override data.
481   ///
482   EFI_IP6_OVERRIDE_DATA    *OverrideData;
483   ///
484   /// Total length in byte of the IPv6 extension headers specified in
485   /// ExtHdrs.
486   ///
487   UINT32                   ExtHdrsLength;
488   ///
489   /// Pointer to the IPv6 extension headers. The IP layer will append
490   /// the required extension headers if they are not specified by
491   /// ExtHdrs. Ignored if ExtHdrsLength is zero.
492   ///
493   VOID                     *ExtHdrs;
494   ///
495   /// The protocol of first extension header in ExtHdrs. Ignored if
496   /// ExtHdrsLength is zero.
497   ///
498   UINT8                    NextHeader;
499   ///
500   /// Total length in bytes of the FragmentTable data to transmit.
501   ///
502   UINT32                   DataLength;
503   ///
504   /// Number of entries in the fragment data table.
505   ///
506   UINT32                   FragmentCount;
507   ///
508   /// Start of the fragment data table.
509   ///
510   EFI_IP6_FRAGMENT_DATA    FragmentTable[1];
511 } EFI_IP6_TRANSMIT_DATA;
512 
513 ///
514 /// EFI_IP6_COMPLETION_TOKEN
515 /// structures are used for both transmit and receive operations.
516 ///
517 typedef struct {
518   ///
519   /// This Event will be signaled after the Status field is updated by
520   /// the EFI IPv6 Protocol driver. The type of Event must be EFI_NOTIFY_SIGNAL.
521   ///
522   EFI_EVENT    Event;
523   ///
524   /// Will be set to one of the following values:
525   /// - EFI_SUCCESS:  The receive or transmit completed
526   ///   successfully.
527   /// - EFI_ABORTED:  The receive or transmit was aborted
528   /// - EFI_TIMEOUT:  The transmit timeout expired.
529   /// - EFI_ICMP_ERROR:  An ICMP error packet was received.
530   /// - EFI_DEVICE_ERROR:  An unexpected system or network
531   ///   error occurred.
532   /// - EFI_SECURITY_VIOLATION: The transmit or receive was
533   ///   failed because of an IPsec policy check.
534   /// - EFI_NO_MEDIA: There was a media error.
535   ///
536   EFI_STATUS    Status;
537   union {
538     ///
539     /// When the Token is used for receiving, RxData is a pointer to the EFI_IP6_RECEIVE_DATA.
540     ///
541     EFI_IP6_RECEIVE_DATA     *RxData;
542     ///
543     /// When the Token is used for transmitting, TxData is a pointer to the EFI_IP6_TRANSMIT_DATA.
544     ///
545     EFI_IP6_TRANSMIT_DATA    *TxData;
546   } Packet;
547 } EFI_IP6_COMPLETION_TOKEN;
548 
549 /**
550   Gets the current operational settings for this instance of the EFI IPv6 Protocol driver.
551 
552   The GetModeData() function returns the current operational mode data for this driver instance.
553   The data fields in EFI_IP6_MODE_DATA are read only. This function is used optionally to
554   retrieve the operational mode data of underlying networks or drivers..
555 
556   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
557   @param[out] Ip6ModeData        Pointer to the EFI IPv6 Protocol mode data structure.
558   @param[out] MnpConfigData      Pointer to the managed network configuration data structure.
559   @param[out] SnpModeData        Pointer to the simple network mode data structure.
560 
561   @retval EFI_SUCCESS            The operation completed successfully.
562   @retval EFI_INVALID_PARAMETER  This is NULL.
563   @retval EFI_OUT_OF_RESOURCES   The required mode data could not be allocated.
564 
565 **/
566 typedef
567 EFI_STATUS
568 (EFIAPI *EFI_IP6_GET_MODE_DATA)(
569   IN EFI_IP6_PROTOCOL                 *This,
570   OUT EFI_IP6_MODE_DATA               *Ip6ModeData     OPTIONAL,
571   OUT EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData   OPTIONAL,
572   OUT EFI_SIMPLE_NETWORK_MODE         *SnpModeData     OPTIONAL
573   );
574 
575 /**
576   Assigns an IPv6 address and subnet mask to this EFI IPv6 Protocol driver instance.
577 
578   The Configure() function is used to set, change, or reset the operational parameters and filter
579   settings for this EFI IPv6 Protocol instance. Until these parameters have been set, no network traffic
580   can be sent or received by this instance. Once the parameters have been reset (by calling this
581   function with Ip6ConfigData set to NULL), no more traffic can be sent or received until these
582   parameters have been set again. Each EFI IPv6 Protocol instance can be started and stopped
583   independently of each other by enabling or disabling their receive filter settings with the
584   Configure() function.
585 
586   If Ip6ConfigData.StationAddress is a valid non-zero IPv6 unicast address, it is required
587   to be one of the currently configured IPv6 addresses list in the EFI IPv6 drivers, or else
588   EFI_INVALID_PARAMETER will be returned. If Ip6ConfigData.StationAddress is
589   unspecified, the IPv6 driver will bind a source address according to the source address selection
590   algorithm. Clients could frequently call GetModeData() to check get currently configured IPv6
591   address list in the EFI IPv6 driver. If both Ip6ConfigData.StationAddress and
592   Ip6ConfigData.Destination are unspecified, when transmitting the packet afterwards, the
593   source address filled in each outgoing IPv6 packet is decided based on the destination of this packet. .
594 
595   If operational parameters are reset or changed, any pending transmit and receive requests will be
596   cancelled. Their completion token status will be set to EFI_ABORTED and their events will be
597   signaled.
598 
599   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
600   @param[in]  Ip6ConfigData      Pointer to the EFI IPv6 Protocol configuration data structure.
601 
602   @retval EFI_SUCCESS            The driver instance was successfully opened.
603   @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:
604                                  - This is NULL.
605                                  - Ip6ConfigData.StationAddress is neither zero nor
606                                    a unicast IPv6 address.
607                                  - Ip6ConfigData.StationAddress is neither zero nor
608                                    one of the configured IP addresses in the EFI IPv6 driver.
609                                  - Ip6ConfigData.DefaultProtocol is illegal.
610   @retval EFI_OUT_OF_RESOURCES   The EFI IPv6 Protocol driver instance data could not be allocated.
611   @retval EFI_NO_MAPPING         The IPv6 driver was responsible for choosing a source address for
612                                  this instance, but no source address was available for use.
613   @retval EFI_ALREADY_STARTED    The interface is already open and must be stopped before the IPv6
614                                  address or prefix length can be changed.
615   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred. The EFI IPv6
616                                  Protocol driver instance is not opened.
617   @retval EFI_UNSUPPORTED        Default protocol specified through
618                                  Ip6ConfigData.DefaulProtocol isn't supported.
619 
620 **/
621 typedef
622 EFI_STATUS
623 (EFIAPI *EFI_IP6_CONFIGURE)(
624   IN EFI_IP6_PROTOCOL            *This,
625   IN EFI_IP6_CONFIG_DATA         *Ip6ConfigData OPTIONAL
626   );
627 
628 /**
629   Joins and leaves multicast groups.
630 
631   The Groups() function is used to join and leave multicast group sessions. Joining a group will
632   enable reception of matching multicast packets. Leaving a group will disable reception of matching
633   multicast packets. Source-Specific Multicast isn't required to be supported.
634 
635   If JoinFlag is FALSE and GroupAddress is NULL, all joined groups will be left.
636 
637   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
638   @param[in]  JoinFlag           Set to TRUE to join the multicast group session and FALSE to leave.
639   @param[in]  GroupAddress       Pointer to the IPv6 multicast address.
640 
641   @retval EFI_SUCCESS            The operation completed successfully.
642   @retval EFI_INVALID_PARAMETER  One or more of the following is TRUE:
643                                  - This is NULL.
644                                  - JoinFlag is TRUE and GroupAddress is NULL.
645                                  - GroupAddress is not NULL and *GroupAddress is
646                                    not a multicast IPv6 address.
647                                  - GroupAddress is not NULL and *GroupAddress is in the
648                                    range of SSM destination address.
649   @retval EFI_NOT_STARTED        This instance has not been started.
650   @retval EFI_OUT_OF_RESOURCES   System resources could not be allocated.
651   @retval EFI_UNSUPPORTED        This EFI IPv6 Protocol implementation does not support multicast groups.
652   @retval EFI_ALREADY_STARTED    The group address is already in the group table (when
653                                  JoinFlag is TRUE).
654   @retval EFI_NOT_FOUND          The group address is not in the group table (when JoinFlag is FALSE).
655   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred.
656 
657 **/
658 typedef
659 EFI_STATUS
660 (EFIAPI *EFI_IP6_GROUPS)(
661   IN EFI_IP6_PROTOCOL            *This,
662   IN BOOLEAN                     JoinFlag,
663   IN EFI_IPv6_ADDRESS            *GroupAddress  OPTIONAL
664   );
665 
666 /**
667   Adds and deletes routing table entries.
668 
669   The Routes() function adds a route to or deletes a route from the routing table.
670 
671   Routes are determined by comparing the leftmost PrefixLength bits of Destination with
672   the destination IPv6 address arithmetically. The gateway address must be on the same subnet as the
673   configured station address.
674 
675   The default route is added with Destination and PrefixLegth both set to all zeros. The
676   default route matches all destination IPv6 addresses that do not match any other routes.
677 
678   All EFI IPv6 Protocol instances share a routing table.
679 
680   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
681   @param[in]  DeleteRoute        Set to TRUE to delete this route from the routing table. Set to
682                                  FALSE to add this route to the routing table. Destination,
683                                  PrefixLength and Gateway are used as the key to each
684                                  route entry.
685   @param[in]  Destination        The address prefix of the subnet that needs to be routed.
686   @param[in]  PrefixLength       The prefix length of Destination. Ignored if Destination
687                                  is NULL.
688   @param[in]  GatewayAddress     The unicast gateway IPv6 address for this route.
689 
690   @retval EFI_SUCCESS            The operation completed successfully.
691   @retval EFI_NOT_STARTED        The driver instance has not been started.
692   @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:
693                                  - This is NULL.
694                                  - When DeleteRoute is TRUE, both Destination and
695                                    GatewayAddress are NULL.
696                                  - When DeleteRoute is FALSE, either Destination or
697                                    GatewayAddress is NULL.
698                                  - *GatewayAddress is not a valid unicast IPv6 address.
699                                  - *GatewayAddress is one of the local configured IPv6
700                                    addresses.
701   @retval EFI_OUT_OF_RESOURCES   Could not add the entry to the routing table.
702   @retval EFI_NOT_FOUND          This route is not in the routing table (when DeleteRoute is TRUE).
703   @retval EFI_ACCESS_DENIED      The route is already defined in the routing table (when
704                                  DeleteRoute is FALSE).
705 
706 **/
707 typedef
708 EFI_STATUS
709 (EFIAPI *EFI_IP6_ROUTES)(
710   IN EFI_IP6_PROTOCOL            *This,
711   IN BOOLEAN                     DeleteRoute,
712   IN EFI_IPv6_ADDRESS            *Destination OPTIONAL,
713   IN UINT8                       PrefixLength,
714   IN EFI_IPv6_ADDRESS            *GatewayAddress OPTIONAL
715   );
716 
717 /**
718   Add or delete Neighbor cache entries.
719 
720   The Neighbors() function is used to add, update, or delete an entry from neighbor cache.
721   IPv6 neighbor cache entries are typically inserted and updated by the network protocol driver as
722   network traffic is processed. Most neighbor cache entries will time out and be deleted if the network
723   traffic stops. Neighbor cache entries that were inserted by Neighbors() may be static (will not
724   timeout) or dynamic (will time out).
725 
726   The implementation should follow the neighbor cache timeout mechanism which is defined in
727   RFC4861. The default neighbor cache timeout value should be tuned for the expected network
728   environment
729 
730   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
731   @param[in]  DeleteFlag         Set to TRUE to delete the specified cache entry, set to FALSE to
732                                  add (or update, if it already exists and Override is TRUE) the
733                                  specified cache entry. TargetIp6Address is used as the key
734                                  to find the requested cache entry.
735   @param[in]  TargetIp6Address   Pointer to Target IPv6 address.
736   @param[in]  TargetLinkAddress  Pointer to link-layer address of the target. Ignored if NULL.
737   @param[in]  Timeout            Time in 100-ns units that this entry will remain in the neighbor
738                                  cache, it will be deleted after Timeout. A value of zero means that
739                                  the entry is permanent. A non-zero value means that the entry is
740                                  dynamic.
741   @param[in]  Override           If TRUE, the cached link-layer address of the matching entry will
742                                  be overridden and updated; if FALSE, EFI_ACCESS_DENIED
743                                  will be returned if a corresponding cache entry already existed.
744 
745   @retval  EFI_SUCCESS           The data has been queued for transmission.
746   @retval  EFI_NOT_STARTED       This instance has not been started.
747   @retval  EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
748                                  - This is NULL.
749                                  - TargetIpAddress is NULL.
750                                  - *TargetLinkAddress is invalid when not NULL.
751                                  - *TargetIpAddress is not a valid unicast IPv6 address.
752                                  - *TargetIpAddress is one of the local configured IPv6
753                                    addresses.
754   @retval  EFI_OUT_OF_RESOURCES  Could not add the entry to the neighbor cache.
755   @retval  EFI_NOT_FOUND         This entry is not in the neighbor cache (when DeleteFlag  is
756                                  TRUE or when DeleteFlag  is FALSE while
757                                  TargetLinkAddress is NULL.).
758   @retval  EFI_ACCESS_DENIED     The to-be-added entry is already defined in the neighbor cache,
759                                  and that entry is tagged as un-overridden (when DeleteFlag
760                                  is FALSE).
761 
762 **/
763 typedef
764 EFI_STATUS
765 (EFIAPI *EFI_IP6_NEIGHBORS)(
766   IN EFI_IP6_PROTOCOL            *This,
767   IN BOOLEAN                     DeleteFlag,
768   IN EFI_IPv6_ADDRESS            *TargetIp6Address,
769   IN EFI_MAC_ADDRESS             *TargetLinkAddress,
770   IN UINT32                      Timeout,
771   IN BOOLEAN                     Override
772   );
773 
774 /**
775   Places outgoing data packets into the transmit queue.
776 
777   The Transmit() function places a sending request in the transmit queue of this
778   EFI IPv6 Protocol instance. Whenever the packet in the token is sent out or some
779   errors occur, the event in the token will be signaled and the status is updated.
780 
781   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
782   @param[in]  Token              Pointer to the transmit token.
783 
784   @retval  EFI_SUCCESS           The data has been queued for transmission.
785   @retval  EFI_NOT_STARTED       This instance has not been started.
786   @retval  EFI_NO_MAPPING        The IPv6 driver was responsible for choosing a source address for
787                                  this transmission, but no source address was available for use.
788   @retval  EFI_INVALID_PARAMETER One or more of the following is TRUE:
789                                  - This is NULL.
790                                  - Token is NULL.
791                                  - Token.Event is NULL.
792                                  - Token.Packet.TxData is NULL.
793                                  - Token.Packet.ExtHdrsLength is not zero and Token.Packet.ExtHdrs is NULL.
794                                  - Token.Packet.FragmentCount is zero.
795                                  - One or more of the Token.Packet.TxData.FragmentTable[].FragmentLength fields is zero.
796                                  - One or more of the Token.Packet.TxData.FragmentTable[].FragmentBuffer fields is NULL.
797                                  - Token.Packet.TxData.DataLength is zero or not equal to the sum of fragment lengths.
798                                  - Token.Packet.TxData.DestinationAddress is non-zero when DestinationAddress is configured as
799                                    non-zero when doing Configure() for this EFI IPv6 protocol instance.
800                                  - Token.Packet.TxData.DestinationAddress is unspecified when DestinationAddress is unspecified
801                                    when doing Configure() for this EFI IPv6 protocol instance.
802   @retval  EFI_ACCESS_DENIED     The transmit completion token with the same Token.Event
803                                  was already in the transmit queue.
804   @retval  EFI_NOT_READY         The completion token could not be queued because the transmit
805                                  queue is full.
806   @retval  EFI_NOT_FOUND         Not route is found to destination address.
807   @retval  EFI_OUT_OF_RESOURCES  Could not queue the transmit data.
808   @retval  EFI_BUFFER_TOO_SMALL  Token.Packet.TxData.TotalDataLength is too
809                                  short to transmit.
810   @retval  EFI_BAD_BUFFER_SIZE   If Token.Packet.TxData.DataLength is beyond the
811                                  maximum that which can be described through the Fragment Offset
812                                  field in Fragment header when performing fragmentation.
813   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred.
814 
815 **/
816 typedef
817 EFI_STATUS
818 (EFIAPI *EFI_IP6_TRANSMIT)(
819   IN EFI_IP6_PROTOCOL            *This,
820   IN EFI_IP6_COMPLETION_TOKEN    *Token
821   );
822 
823 /**
824   Places a receiving request into the receiving queue.
825 
826   The Receive() function places a completion token into the receive packet queue.
827   This function is always asynchronous.
828 
829   The Token.Event field in the completion token must be filled in by the caller
830   and cannot be NULL. When the receive operation completes, the EFI IPv6 Protocol
831   driver updates the Token.Status and Token.Packet.RxData fields and the Token.Event
832   is signaled.
833 
834   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
835   @param[in]  Token              Pointer to a token that is associated with the receive data descriptor.
836 
837   @retval EFI_SUCCESS            The receive completion token was cached.
838   @retval EFI_NOT_STARTED        This EFI IPv6 Protocol instance has not been started.
839   @retval EFI_NO_MAPPING         When IP6 driver responsible for binding source address to this instance,
840                                  while no source address is available for use.
841   @retval EFI_INVALID_PARAMETER  One or more of the following conditions is TRUE:
842                                  - This is NULL.
843                                  - Token is NULL.
844                                  - Token.Event is NULL.
845   @retval EFI_OUT_OF_RESOURCES   The receive completion token could not be queued due to a lack of system
846                                  resources (usually memory).
847   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred.
848                                  The EFI IPv6 Protocol instance has been reset to startup defaults.
849   @retval EFI_ACCESS_DENIED      The receive completion token with the same Token.Event was already
850                                  in the receive queue.
851   @retval EFI_NOT_READY          The receive request could not be queued because the receive queue is full.
852 
853 **/
854 typedef
855 EFI_STATUS
856 (EFIAPI *EFI_IP6_RECEIVE)(
857   IN EFI_IP6_PROTOCOL            *This,
858   IN EFI_IP6_COMPLETION_TOKEN    *Token
859   );
860 
861 /**
862   Abort an asynchronous transmit or receive request.
863 
864   The Cancel() function is used to abort a pending transmit or receive request.
865   If the token is in the transmit or receive request queues, after calling this
866   function, Token->Status will be set to EFI_ABORTED and then Token->Event will
867   be signaled. If the token is not in one of the queues, which usually means the
868   asynchronous operation has completed, this function will not signal the token
869   and EFI_NOT_FOUND is returned.
870 
871   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
872   @param[in]  Token              Pointer to a token that has been issued by
873                                  EFI_IP6_PROTOCOL.Transmit() or
874                                  EFI_IP6_PROTOCOL.Receive(). If NULL, all pending
875                                  tokens are aborted. Type EFI_IP6_COMPLETION_TOKEN is
876                                  defined in EFI_IP6_PROTOCOL.Transmit().
877 
878   @retval EFI_SUCCESS            The asynchronous I/O request was aborted and
879                                  Token->Event was signaled. When Token is NULL, all
880                                  pending requests were aborted and their events were signaled.
881   @retval EFI_INVALID_PARAMETER  This is NULL.
882   @retval EFI_NOT_STARTED        This instance has not been started.
883   @retval EFI_NOT_FOUND          When Token is not NULL, the asynchronous I/O request was
884                                  not found in the transmit or receive queue. It has either completed
885                                  or was not issued by Transmit() and Receive().
886   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred.
887 
888 **/
889 typedef
890 EFI_STATUS
891 (EFIAPI *EFI_IP6_CANCEL)(
892   IN EFI_IP6_PROTOCOL            *This,
893   IN EFI_IP6_COMPLETION_TOKEN    *Token    OPTIONAL
894   );
895 
896 /**
897   Polls for incoming data packets and processes outgoing data packets.
898 
899   The Poll() function polls for incoming data packets and processes outgoing data
900   packets. Network drivers and applications can call the EFI_IP6_PROTOCOL.Poll()
901   function to increase the rate that data packets are moved between the communications
902   device and the transmit and receive queues.
903 
904   In some systems the periodic timer event may not poll the underlying communications
905   device fast enough to transmit and/or receive all data packets without missing
906   incoming packets or dropping outgoing packets. Drivers and applications that are
907   experiencing packet loss should try calling the EFI_IP6_PROTOCOL.Poll() function
908   more often.
909 
910   @param[in]  This               Pointer to the EFI_IP6_PROTOCOL instance.
911 
912   @retval  EFI_SUCCESS           Incoming or outgoing data was processed.
913   @retval  EFI_NOT_STARTED       This EFI IPv6 Protocol instance has not been started.
914   @retval  EFI_INVALID_PARAMETER This is NULL.
915   @retval  EFI_DEVICE_ERROR      An unexpected system or network error occurred.
916   @retval  EFI_NOT_READY         No incoming or outgoing data is processed.
917   @retval  EFI_TIMEOUT           Data was dropped out of the transmit and/or receive queue.
918                                  Consider increasing the polling rate.
919 
920 **/
921 typedef
922 EFI_STATUS
923 (EFIAPI *EFI_IP6_POLL)(
924   IN EFI_IP6_PROTOCOL            *This
925   );
926 
927 ///
928 /// The EFI IPv6 Protocol implements a simple packet-oriented interface that can be
929 /// used by drivers, daemons, and applications to transmit and receive network packets.
930 ///
931 struct _EFI_IP6_PROTOCOL {
932   EFI_IP6_GET_MODE_DATA    GetModeData;
933   EFI_IP6_CONFIGURE        Configure;
934   EFI_IP6_GROUPS           Groups;
935   EFI_IP6_ROUTES           Routes;
936   EFI_IP6_NEIGHBORS        Neighbors;
937   EFI_IP6_TRANSMIT         Transmit;
938   EFI_IP6_RECEIVE          Receive;
939   EFI_IP6_CANCEL           Cancel;
940   EFI_IP6_POLL             Poll;
941 };
942 
943 extern EFI_GUID  gEfiIp6ServiceBindingProtocolGuid;
944 extern EFI_GUID  gEfiIp6ProtocolGuid;
945 
946 #endif
947