2 This library is only intended to be used by UEFI network stack modules.
3 It provides basic functions for the UEFI network stack.
5 Copyright (c) 2005 - 2016, Intel Corporation. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at<BR>
9 http://opensource.org/licenses/bsd-license.php
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 #include <Protocol/Ip6.h>
21 #include <Library/BaseLib.h>
22 #include <Library/BaseMemoryLib.h>
24 typedef UINT32 IP4_ADDR
;
25 typedef UINT32 TCP_SEQNO
;
26 typedef UINT16 TCP_PORTNO
;
29 #define NET_ETHER_ADDR_LEN 6
30 #define NET_IFTYPE_ETHERNET 0x01
32 #define NET_VLAN_TAG_LEN 4
33 #define ETHER_TYPE_VLAN 0x8100
35 #define EFI_IP_PROTO_UDP 0x11
36 #define EFI_IP_PROTO_TCP 0x06
37 #define EFI_IP_PROTO_ICMP 0x01
38 #define IP4_PROTO_IGMP 0x02
40 #define DNS_MAX_NAME_SIZE 255
41 #define DNS_MAX_MESSAGE_SIZE 512
44 // The address classification
46 #define IP4_ADDR_CLASSA 1
47 #define IP4_ADDR_CLASSB 2
48 #define IP4_ADDR_CLASSC 3
49 #define IP4_ADDR_CLASSD 4
50 #define IP4_ADDR_CLASSE 5
52 #define IP4_MASK_NUM 33
53 #define IP6_PREFIX_NUM 129
55 #define IP4_MASK_MAX 32
56 #define IP6_PREFIX_MAX 128
58 #define IP6_HOP_BY_HOP 0
59 #define IP6_DESTINATION 60
60 #define IP6_ROUTING 43
61 #define IP6_FRAGMENT 44
64 #define IP6_NO_NEXT_HEADER 59
66 #define IP_VERSION_4 4
67 #define IP_VERSION_6 6
69 #define IP6_PREFIX_LENGTH 64
76 #define DNS_TYPE_CNAME 5
77 #define DNS_TYPE_SOA 6
78 #define DNS_TYPE_WKS 11
79 #define DNS_TYPE_PTR 12
80 #define DNS_TYPE_HINFO 13
81 #define DNS_TYPE_MINFO 14
82 #define DNS_TYPE_MX 15
83 #define DNS_TYPE_TXT 16
84 #define DNS_TYPE_AAAA 28
85 #define DNS_TYPE_SRV_RR 33
86 #define DNS_TYPE_AXFR 252
87 #define DNS_TYPE_MAILB 253
88 #define DNS_TYPE_ANY 255
93 #define DNS_CLASS_INET 1
94 #define DNS_CLASS_CH 3
95 #define DNS_CLASS_HS 4
96 #define DNS_CLASS_ANY 255
101 // Ethernet head definition
104 UINT8 DstMac
[NET_ETHER_ADDR_LEN
];
105 UINT8 SrcMac
[NET_ETHER_ADDR_LEN
];
110 // 802.1Q VLAN Tag Control Information
114 UINT16 Vid
: 12; // Unique VLAN identifier (0 to 4094)
115 UINT16 Cfi
: 1; // Canonical Format Indicator
116 UINT16 Priority
: 3; // 802.1Q priority level (0 to 7)
121 #define VLAN_TCI_CFI_CANONICAL_MAC 0
122 #define VLAN_TCI_CFI_NON_CANONICAL_MAC 1
125 // The EFI_IP4_HEADER is hard to use because the source and
126 // destination address are defined as EFI_IPv4_ADDRESS, which
127 // is a structure. Two structures can't be compared or masked
128 // directly. This is why there is an internal representation.
146 // ICMP head definition. Each ICMP message is categorized as either an error
147 // message or query message. Two message types have their own head format.
157 UINT32 Fourth
; // 4th filed of the head, it depends on Type.
159 } IP4_ICMP_ERROR_HEAD
;
165 } IP4_ICMP_QUERY_HEAD
;
176 EFI_IP6_HEADER IpHead
;
177 } IP6_ICMP_ERROR_HEAD
;
182 } IP6_ICMP_INFORMATION_HEAD
;
185 // UDP header definition
195 // TCP header definition
212 #define NET_MAC_EQUAL(pMac1, pMac2, Len) \
213 (CompareMem ((pMac1), (pMac2), Len) == 0)
215 #define NET_MAC_IS_MULTICAST(Mac, BMac, Len) \
216 (((*((UINT8 *) Mac) & 0x01) == 0x01) && (!NET_MAC_EQUAL (Mac, BMac, Len)))
218 #define NTOHL(x) SwapBytes32 (x)
220 #define HTONL(x) NTOHL(x)
222 #define NTOHS(x) SwapBytes16 (x)
224 #define HTONS(x) NTOHS(x)
225 #define NTOHLL(x) SwapBytes64 (x)
226 #define HTONLL(x) NTOHLL(x)
227 #define NTOHLLL(x) Ip6Swap128 (x)
228 #define HTONLLL(x) NTOHLLL(x)
231 // Test the IP's attribute, All the IPs are in host byte order.
233 #define IP4_IS_MULTICAST(Ip) (((Ip) & 0xF0000000) == 0xE0000000)
234 #define IP4_IS_LOCAL_BROADCAST(Ip) ((Ip) == 0xFFFFFFFF)
235 #define IP4_NET_EQUAL(Ip1, Ip2, NetMask) (((Ip1) & (NetMask)) == ((Ip2) & (NetMask)))
236 #define IP4_IS_VALID_NETMASK(Ip) (NetGetMaskLength (Ip) != (IP4_MASK_MAX + 1))
238 #define IP6_IS_MULTICAST(Ip6) (((Ip6)->Addr[0]) == 0xFF)
241 // Convert the EFI_IP4_ADDRESS to plain UINT32 IP4 address.
243 #define EFI_IP4(EfiIpAddr) (*(IP4_ADDR *) ((EfiIpAddr).Addr))
244 #define EFI_NTOHL(EfiIp) (NTOHL (EFI_IP4 ((EfiIp))))
245 #define EFI_IP4_EQUAL(Ip1, Ip2) (CompareMem ((Ip1), (Ip2), sizeof (EFI_IPv4_ADDRESS)) == 0)
247 #define EFI_IP6_EQUAL(Ip1, Ip2) (CompareMem ((Ip1), (Ip2), sizeof (EFI_IPv6_ADDRESS)) == 0)
249 #define IP4_COPY_ADDRESS(Dest, Src) (CopyMem ((Dest), (Src), sizeof (EFI_IPv4_ADDRESS)))
250 #define IP6_COPY_ADDRESS(Dest, Src) (CopyMem ((Dest), (Src), sizeof (EFI_IPv6_ADDRESS)))
251 #define IP6_COPY_LINK_ADDRESS(Mac1, Mac2) (CopyMem ((Mac1), (Mac2), sizeof (EFI_MAC_ADDRESS)))
254 // The debug level definition. This value is also used as the
255 // syslog's severity level. Don't change it.
257 #define NETDEBUG_LEVEL_TRACE 5
258 #define NETDEBUG_LEVEL_WARNING 4
259 #define NETDEBUG_LEVEL_ERROR 3
262 // Network debug message is sent out as syslog packet.
264 #define NET_SYSLOG_FACILITY 16 // Syslog local facility local use
265 #define NET_SYSLOG_PACKET_LEN 512
266 #define NET_SYSLOG_TX_TIMEOUT (500 * 1000 * 10) // 500ms
267 #define NET_DEBUG_MSG_LEN 470 // 512 - (ether+ip4+udp4 head length)
270 // The debug output expects the ASCII format string, Use %a to print ASCII
271 // string, and %s to print UNICODE string. PrintArg must be enclosed in ().
272 // For example: NET_DEBUG_TRACE ("Tcp", ("State transit to %a\n", Name));
274 #define NET_DEBUG_TRACE(Module, PrintArg) \
276 NETDEBUG_LEVEL_TRACE, \
280 NetDebugASPrint PrintArg \
283 #define NET_DEBUG_WARNING(Module, PrintArg) \
285 NETDEBUG_LEVEL_WARNING, \
289 NetDebugASPrint PrintArg \
292 #define NET_DEBUG_ERROR(Module, PrintArg) \
294 NETDEBUG_LEVEL_ERROR, \
298 NetDebugASPrint PrintArg \
302 Allocate a buffer, then format the message to it. This is a
303 help function for the NET_DEBUG_XXX macros. The PrintArg of
304 these macros treats the variable length print parameters as a
305 single parameter, and pass it to the NetDebugASPrint. For
306 example, NET_DEBUG_TRACE ("Tcp", ("State transit to %a\n", Name))
310 NETDEBUG_LEVEL_TRACE,
314 NetDebugASPrint ("State transit to %a\n", Name)
317 @param Format The ASCII format string.
318 @param ... The variable length parameter whose format is determined
319 by the Format string.
321 @return The buffer containing the formatted message,
322 or NULL if memory allocation failed.
333 Builds an UDP4 syslog packet and send it using SNP.
335 This function will locate a instance of SNP then send the message through it.
336 Because it isn't open the SNP BY_DRIVER, apply caution when using it.
338 @param Level The severity level of the message.
339 @param Module The Module that generates the log.
340 @param File The file that contains the log.
341 @param Line The exact line that contains the log.
342 @param Message The user message to log.
344 @retval EFI_INVALID_PARAMETER Any input parameter is invalid.
345 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for the packet
346 @retval EFI_SUCCESS The log is discard because that it is more verbose
347 than the mNetDebugLevelMax. Or, it has been sent out.
361 Return the length of the mask.
363 Return the length of the mask. Valid values are 0 to 32.
364 If the mask is invalid, return the invalid length 33, which is IP4_MASK_NUM.
365 NetMask is in the host byte order.
367 @param[in] NetMask The netmask to get the length from.
369 @return The length of the netmask, or IP4_MASK_NUM (33) if the mask is invalid.
379 Return the class of the IP address, such as class A, B, C.
380 Addr is in host byte order.
382 The address of class A starts with 0.
383 If the address belong to class A, return IP4_ADDR_CLASSA.
384 The address of class B starts with 10.
385 If the address belong to class B, return IP4_ADDR_CLASSB.
386 The address of class C starts with 110.
387 If the address belong to class C, return IP4_ADDR_CLASSC.
388 The address of class D starts with 1110.
389 If the address belong to class D, return IP4_ADDR_CLASSD.
390 The address of class E starts with 1111.
391 If the address belong to class E, return IP4_ADDR_CLASSE.
394 @param[in] Addr The address to get the class from.
396 @return IP address class, such as IP4_ADDR_CLASSA.
406 Check whether the IP is a valid unicast address according to
407 the netmask. If NetMask is zero, use the IP address's class to get the default mask.
409 If Ip is 0, IP is not a valid unicast address.
410 Class D address is used for multicasting and class E address is reserved for future. If Ip
411 belongs to class D or class E, Ip is not a valid unicast address.
412 If all bits of the host address of Ip are 0 or 1, Ip is not a valid unicast address.
414 @param[in] Ip The IP to check against.
415 @param[in] NetMask The mask of the IP.
417 @return TRUE if Ip is a valid unicast address on the network, otherwise FALSE.
428 Check whether the incoming IPv6 address is a valid unicast address.
430 If the address is a multicast address has binary 0xFF at the start, it is not
431 a valid unicast address. If the address is unspecified ::, it is not a valid
432 unicast address to be assigned to any node. If the address is loopback address
433 ::1, it is also not a valid unicast address to be assigned to any physical
436 @param[in] Ip6 The IPv6 address to check against.
438 @return TRUE if Ip6 is a valid unicast address on the network, otherwise FALSE.
443 NetIp6IsValidUnicast (
444 IN EFI_IPv6_ADDRESS
*Ip6
449 Check whether the incoming Ipv6 address is the unspecified address or not.
451 @param[in] Ip6 - Ip6 address, in network order.
453 @retval TRUE - Yes, incoming Ipv6 address is the unspecified address.
454 @retval FALSE - The incoming Ipv6 address is not the unspecified address
459 NetIp6IsUnspecifiedAddr (
460 IN EFI_IPv6_ADDRESS
*Ip6
464 Check whether the incoming Ipv6 address is a link-local address.
466 @param[in] Ip6 - Ip6 address, in network order.
468 @retval TRUE - The incoming Ipv6 address is a link-local address.
469 @retval FALSE - The incoming Ipv6 address is not a link-local address.
474 NetIp6IsLinkLocalAddr (
475 IN EFI_IPv6_ADDRESS
*Ip6
479 Check whether the Ipv6 address1 and address2 are on the connected network.
481 @param[in] Ip1 - Ip6 address1, in network order.
482 @param[in] Ip2 - Ip6 address2, in network order.
483 @param[in] PrefixLength - The prefix length of the checking net.
485 @retval TRUE - Yes, the Ipv6 address1 and address2 are connected.
486 @retval FALSE - No the Ipv6 address1 and address2 are not connected.
492 EFI_IPv6_ADDRESS
*Ip1
,
493 EFI_IPv6_ADDRESS
*Ip2
,
498 Switches the endianess of an IPv6 address.
500 This function swaps the bytes in a 128-bit IPv6 address to switch the value
501 from little endian to big endian or vice versa. The byte swapped value is
504 @param Ip6 Points to an IPv6 address.
506 @return The byte swapped IPv6 address.
512 EFI_IPv6_ADDRESS
*Ip6
515 extern IP4_ADDR gIp4AllMasks
[IP4_MASK_NUM
];
518 extern EFI_IPv4_ADDRESS mZeroIp4Addr
;
520 #define NET_IS_DIGIT(Ch) (('0' <= (Ch)) && ((Ch) <= '9'))
521 #define NET_ROUNDUP(size, unit) (((size) + (unit) - 1) & (~((unit) - 1)))
522 #define NET_IS_LOWER_CASE_CHAR(Ch) (('a' <= (Ch)) && ((Ch) <= 'z'))
523 #define NET_IS_UPPER_CASE_CHAR(Ch) (('A' <= (Ch)) && ((Ch) <= 'Z'))
525 #define TICKS_PER_MS 10000U
526 #define TICKS_PER_SECOND 10000000U
528 #define NET_RANDOM(Seed) ((UINT32) ((UINT32) (Seed) * 1103515245UL + 12345) % 4294967295UL)
531 Extract a UINT32 from a byte stream.
533 This function copies a UINT32 from a byte stream, and then converts it from Network
534 byte order to host byte order. Use this function to avoid alignment error.
536 @param[in] Buf The buffer to extract the UINT32.
538 @return The UINT32 extracted.
548 Puts a UINT32 into the byte stream in network byte order.
550 Converts a UINT32 from host byte order to network byte order, then copies it to the
553 @param[in, out] Buf The buffer in which to put the UINT32.
554 @param[in] Data The data to be converted and put into the byte stream.
565 Initialize a random seed using current time and monotonic count.
567 Get current time and monotonic count first. Then initialize a random seed
568 based on some basic mathematics operation on the hour, day, minute, second,
569 nanosecond and year of the current time and the monotonic count value.
571 @return The random seed initialized with current time.
581 #define NET_LIST_USER_STRUCT(Entry, Type, Field) \
582 BASE_CR(Entry, Type, Field)
584 #define NET_LIST_USER_STRUCT_S(Entry, Type, Field, Sig) \
585 CR(Entry, Type, Field, Sig)
588 // Iterate through the double linked list. It is NOT delete safe
590 #define NET_LIST_FOR_EACH(Entry, ListHead) \
591 for(Entry = (ListHead)->ForwardLink; Entry != (ListHead); Entry = Entry->ForwardLink)
594 // Iterate through the double linked list. This is delete-safe.
595 // Don't touch NextEntry. Also, don't use this macro if list
596 // entries other than the Entry may be deleted when processing
597 // the current Entry.
599 #define NET_LIST_FOR_EACH_SAFE(Entry, NextEntry, ListHead) \
600 for(Entry = (ListHead)->ForwardLink, NextEntry = Entry->ForwardLink; \
601 Entry != (ListHead); \
602 Entry = NextEntry, NextEntry = Entry->ForwardLink \
606 // Make sure the list isn't empty before getting the first/last record.
608 #define NET_LIST_HEAD(ListHead, Type, Field) \
609 NET_LIST_USER_STRUCT((ListHead)->ForwardLink, Type, Field)
611 #define NET_LIST_TAIL(ListHead, Type, Field) \
612 NET_LIST_USER_STRUCT((ListHead)->BackLink, Type, Field)
616 Remove the first node entry on the list, and return the removed node entry.
618 Removes the first node entry from a doubly linked list. It is up to the caller of
619 this function to release the memory used by the first node, if that is required. On
620 exit, the removed node is returned.
622 If Head is NULL, then ASSERT().
623 If Head was not initialized, then ASSERT().
624 If PcdMaximumLinkedListLength is not zero, and the number of nodes in the
625 linked list including the head node is greater than or equal to PcdMaximumLinkedListLength,
628 @param[in, out] Head The list header.
630 @return The first node entry that is removed from the list, NULL if the list is empty.
636 IN OUT LIST_ENTRY
*Head
640 Remove the last node entry on the list and return the removed node entry.
642 Removes the last node entry from a doubly linked list. It is up to the caller of
643 this function to release the memory used by the first node, if that is required. On
644 exit, the removed node is returned.
646 If Head is NULL, then ASSERT().
647 If Head was not initialized, then ASSERT().
648 If PcdMaximumLinkedListLength is not zero, and the number of nodes in the
649 linked list including the head node is greater than or equal to PcdMaximumLinkedListLength,
652 @param[in, out] Head The list head.
654 @return The last node entry that is removed from the list, NULL if the list is empty.
660 IN OUT LIST_ENTRY
*Head
664 Insert a new node entry after a designated node entry of a doubly linked list.
666 Inserts a new node entry designated by NewEntry after the node entry designated by PrevEntry
667 of the doubly linked list.
669 @param[in, out] PrevEntry The entry after which to insert.
670 @param[in, out] NewEntry The new entry to insert.
676 IN OUT LIST_ENTRY
*PrevEntry
,
677 IN OUT LIST_ENTRY
*NewEntry
681 Insert a new node entry before a designated node entry of a doubly linked list.
683 Inserts a new node entry designated by NewEntry before the node entry designated by PostEntry
684 of the doubly linked list.
686 @param[in, out] PostEntry The entry to insert before.
687 @param[in, out] NewEntry The new entry to insert.
692 NetListInsertBefore (
693 IN OUT LIST_ENTRY
*PostEntry
,
694 IN OUT LIST_ENTRY
*NewEntry
698 Callback function which provided by user to remove one node in NetDestroyLinkList process.
700 @param[in] Entry The entry to be removed.
701 @param[in] Context Pointer to the callback context corresponds to the Context in NetDestroyLinkList.
703 @retval EFI_SUCCESS The entry has been removed successfully.
704 @retval Others Fail to remove the entry.
709 (EFIAPI
*NET_DESTROY_LINK_LIST_CALLBACK
) (
710 IN LIST_ENTRY
*Entry
,
711 IN VOID
*Context OPTIONAL
715 Safe destroy nodes in a linked list, and return the length of the list after all possible operations finished.
717 Destroy network children list by list traversals is not safe due to graph dependencies between nodes.
718 This function performs a safe traversal to destroy these nodes by checking to see if the node being destroyed
719 has been removed from the list or not.
720 If it has been removed, then restart the traversal from the head.
721 If it hasn't been removed, then continue with the next node directly.
722 This function will end the iterate and return the CallBack's last return value if error happens,
723 or retrun EFI_SUCCESS if 2 complete passes are made with no changes in the number of children in the list.
725 @param[in] List The head of the list.
726 @param[in] CallBack Pointer to the callback function to destroy one node in the list.
727 @param[in] Context Pointer to the callback function's context: corresponds to the
728 parameter Context in NET_DESTROY_LINK_LIST_CALLBACK.
729 @param[out] ListLength The length of the link list if the function returns successfully.
731 @retval EFI_SUCCESS Two complete passes are made with no changes in the number of children.
732 @retval EFI_INVALID_PARAMETER The input parameter is invalid.
733 @retval Others Return the CallBack's last return value.
740 IN NET_DESTROY_LINK_LIST_CALLBACK CallBack
,
741 IN VOID
*Context
, OPTIONAL
742 OUT UINTN
*ListLength OPTIONAL
746 This function checks the input Handle to see if it's one of these handles in ChildHandleBuffer.
748 @param[in] Handle Handle to be checked.
749 @param[in] NumberOfChildren Number of Handles in ChildHandleBuffer.
750 @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL
751 if NumberOfChildren is 0.
753 @retval TRUE Found the input Handle in ChildHandleBuffer.
754 @retval FALSE Can't find the input Handle in ChildHandleBuffer.
759 NetIsInHandleBuffer (
760 IN EFI_HANDLE Handle
,
761 IN UINTN NumberOfChildren
,
762 IN EFI_HANDLE
*ChildHandleBuffer OPTIONAL
766 // Object container: EFI network stack spec defines various kinds of
767 // tokens. The drivers can share code to manage those objects.
781 #define NET_MAP_INCREAMENT 64
784 Initialize the netmap. Netmap is a reposity to keep the <Key, Value> pairs.
786 Initialize the forward and backward links of two head nodes donated by Map->Used
787 and Map->Recycled of two doubly linked lists.
788 Initializes the count of the <Key, Value> pairs in the netmap to zero.
790 If Map is NULL, then ASSERT().
791 If the address of Map->Used is NULL, then ASSERT().
792 If the address of Map->Recycled is NULl, then ASSERT().
794 @param[in, out] Map The netmap to initialize.
804 To clean up the netmap, that is, release allocated memories.
806 Removes all nodes of the Used doubly linked list and frees memory of all related netmap items.
807 Removes all nodes of the Recycled doubly linked list and free memory of all related netmap items.
808 The number of the <Key, Value> pairs in the netmap is set to zero.
810 If Map is NULL, then ASSERT().
812 @param[in, out] Map The netmap to clean up.
822 Test whether the netmap is empty and return true if it is.
824 If the number of the <Key, Value> pairs in the netmap is zero, return TRUE.
826 If Map is NULL, then ASSERT().
829 @param[in] Map The net map to test.
831 @return TRUE if the netmap is empty, otherwise FALSE.
841 Return the number of the <Key, Value> pairs in the netmap.
843 @param[in] Map The netmap to get the entry number.
845 @return The entry number in the netmap.
855 Allocate an item to save the <Key, Value> pair to the head of the netmap.
857 Allocate an item to save the <Key, Value> pair and add corresponding node entry
858 to the beginning of the Used doubly linked list. The number of the <Key, Value>
859 pairs in the netmap increase by 1.
861 If Map is NULL, then ASSERT().
863 @param[in, out] Map The netmap to insert into.
864 @param[in] Key The user's key.
865 @param[in] Value The user's value for the key.
867 @retval EFI_OUT_OF_RESOURCES Failed to allocate the memory for the item.
868 @retval EFI_SUCCESS The item is inserted to the head.
876 IN VOID
*Value OPTIONAL
880 Allocate an item to save the <Key, Value> pair to the tail of the netmap.
882 Allocate an item to save the <Key, Value> pair and add corresponding node entry
883 to the tail of the Used doubly linked list. The number of the <Key, Value>
884 pairs in the netmap increase by 1.
886 If Map is NULL, then ASSERT().
888 @param[in, out] Map The netmap to insert into.
889 @param[in] Key The user's key.
890 @param[in] Value The user's value for the key.
892 @retval EFI_OUT_OF_RESOURCES Failed to allocate the memory for the item.
893 @retval EFI_SUCCESS The item is inserted to the tail.
901 IN VOID
*Value OPTIONAL
905 Finds the key in the netmap and returns the point to the item containing the Key.
907 Iterate the Used doubly linked list of the netmap to get every item. Compare the key of every
908 item with the key to search. It returns the point to the item contains the Key if found.
910 If Map is NULL, then ASSERT().
912 @param[in] Map The netmap to search within.
913 @param[in] Key The key to search.
915 @return The point to the item contains the Key, or NULL if Key isn't in the map.
926 Remove the node entry of the item from the netmap and return the key of the removed item.
928 Remove the node entry of the item from the Used doubly linked list of the netmap.
929 The number of the <Key, Value> pairs in the netmap decrease by 1. Then add the node
930 entry of the item to the Recycled doubly linked list of the netmap. If Value is not NULL,
931 Value will point to the value of the item. It returns the key of the removed item.
933 If Map is NULL, then ASSERT().
934 If Item is NULL, then ASSERT().
935 if item in not in the netmap, then ASSERT().
937 @param[in, out] Map The netmap to remove the item from.
938 @param[in, out] Item The item to remove.
939 @param[out] Value The variable to receive the value if not NULL.
941 @return The key of the removed item.
948 IN OUT NET_MAP_ITEM
*Item
,
949 OUT VOID
**Value OPTIONAL
953 Remove the first node entry on the netmap and return the key of the removed item.
955 Remove the first node entry from the Used doubly linked list of the netmap.
956 The number of the <Key, Value> pairs in the netmap decrease by 1. Then add the node
957 entry to the Recycled doubly linked list of the netmap. If parameter Value is not NULL,
958 parameter Value will point to the value of the item. It returns the key of the removed item.
960 If Map is NULL, then ASSERT().
961 If the Used doubly linked list is empty, then ASSERT().
963 @param[in, out] Map The netmap to remove the head from.
964 @param[out] Value The variable to receive the value if not NULL.
966 @return The key of the item removed.
973 OUT VOID
**Value OPTIONAL
977 Remove the last node entry on the netmap and return the key of the removed item.
979 Remove the last node entry from the Used doubly linked list of the netmap.
980 The number of the <Key, Value> pairs in the netmap decrease by 1. Then add the node
981 entry to the Recycled doubly linked list of the netmap. If parameter Value is not NULL,
982 parameter Value will point to the value of the item. It returns the key of the removed item.
984 If Map is NULL, then ASSERT().
985 If the Used doubly linked list is empty, then ASSERT().
987 @param[in, out] Map The netmap to remove the tail from.
988 @param[out] Value The variable to receive the value if not NULL.
990 @return The key of the item removed.
997 OUT VOID
**Value OPTIONAL
1002 (EFIAPI
*NET_MAP_CALLBACK
) (
1004 IN NET_MAP_ITEM
*Item
,
1009 Iterate through the netmap and call CallBack for each item.
1011 It will continue the traverse if CallBack returns EFI_SUCCESS, otherwise, break
1012 from the loop. It returns the CallBack's last return value. This function is
1013 delete safe for the current item.
1015 If Map is NULL, then ASSERT().
1016 If CallBack is NULL, then ASSERT().
1018 @param[in] Map The Map to iterate through.
1019 @param[in] CallBack The callback function to call for each item.
1020 @param[in] Arg The opaque parameter to the callback.
1022 @retval EFI_SUCCESS There is no item in the netmap, or CallBack for each item
1023 returns EFI_SUCCESS.
1024 @retval Others It returns the CallBack's last return value.
1031 IN NET_MAP_CALLBACK CallBack
,
1032 IN VOID
*Arg OPTIONAL
1037 // Helper functions to implement driver binding and service binding protocols.
1040 Create a child of the service that is identified by ServiceBindingGuid.
1042 Get the ServiceBinding Protocol first, then use it to create a child.
1044 If ServiceBindingGuid is NULL, then ASSERT().
1045 If ChildHandle is NULL, then ASSERT().
1047 @param[in] Controller The controller which has the service installed.
1048 @param[in] Image The image handle used to open service.
1049 @param[in] ServiceBindingGuid The service's Guid.
1050 @param[in, out] ChildHandle The handle to receive the created child.
1052 @retval EFI_SUCCESS The child was successfully created.
1053 @retval Others Failed to create the child.
1058 NetLibCreateServiceChild (
1059 IN EFI_HANDLE Controller
,
1060 IN EFI_HANDLE Image
,
1061 IN EFI_GUID
*ServiceBindingGuid
,
1062 IN OUT EFI_HANDLE
*ChildHandle
1066 Destroy a child of the service that is identified by ServiceBindingGuid.
1068 Get the ServiceBinding Protocol first, then use it to destroy a child.
1070 If ServiceBindingGuid is NULL, then ASSERT().
1072 @param[in] Controller The controller which has the service installed.
1073 @param[in] Image The image handle used to open service.
1074 @param[in] ServiceBindingGuid The service's Guid.
1075 @param[in] ChildHandle The child to destroy.
1077 @retval EFI_SUCCESS The child was destroyed.
1078 @retval Others Failed to destroy the child.
1083 NetLibDestroyServiceChild (
1084 IN EFI_HANDLE Controller
,
1085 IN EFI_HANDLE Image
,
1086 IN EFI_GUID
*ServiceBindingGuid
,
1087 IN EFI_HANDLE ChildHandle
1091 Get handle with Simple Network Protocol installed on it.
1093 There should be MNP Service Binding Protocol installed on the input ServiceHandle.
1094 If Simple Network Protocol is already installed on the ServiceHandle, the
1095 ServiceHandle will be returned. If SNP is not installed on the ServiceHandle,
1096 try to find its parent handle with SNP installed.
1098 @param[in] ServiceHandle The handle where network service binding protocols are
1100 @param[out] Snp The pointer to store the address of the SNP instance.
1101 This is an optional parameter that may be NULL.
1103 @return The SNP handle, or NULL if not found.
1108 NetLibGetSnpHandle (
1109 IN EFI_HANDLE ServiceHandle
,
1110 OUT EFI_SIMPLE_NETWORK_PROTOCOL
**Snp OPTIONAL
1114 Retrieve VLAN ID of a VLAN device handle.
1116 Search VLAN device path node in Device Path of specified ServiceHandle and
1117 return its VLAN ID. If no VLAN device path node found, then this ServiceHandle
1118 is not a VLAN device handle, and 0 will be returned.
1120 @param[in] ServiceHandle The handle where network service binding protocols are
1123 @return VLAN ID of the device handle, or 0 if not a VLAN device.
1129 IN EFI_HANDLE ServiceHandle
1133 Find VLAN device handle with specified VLAN ID.
1135 The VLAN child device handle is created by VLAN Config Protocol on ControllerHandle.
1136 This function will append VLAN device path node to the parent device path,
1137 and then use LocateDevicePath() to find the correct VLAN device handle.
1139 @param[in] ControllerHandle The handle where network service binding protocols are
1141 @param[in] VlanId The configured VLAN ID for the VLAN device.
1143 @return The VLAN device handle, or NULL if not found.
1148 NetLibGetVlanHandle (
1149 IN EFI_HANDLE ControllerHandle
,
1154 Get MAC address associated with the network service handle.
1156 There should be MNP Service Binding Protocol installed on the input ServiceHandle.
1157 If SNP is installed on the ServiceHandle or its parent handle, MAC address will
1158 be retrieved from SNP. If no SNP found, try to get SNP mode data use MNP.
1160 @param[in] ServiceHandle The handle where network service binding protocols are
1162 @param[out] MacAddress The pointer to store the returned MAC address.
1163 @param[out] AddressSize The length of returned MAC address.
1165 @retval EFI_SUCCESS MAC address was returned successfully.
1166 @retval Others Failed to get SNP mode data.
1171 NetLibGetMacAddress (
1172 IN EFI_HANDLE ServiceHandle
,
1173 OUT EFI_MAC_ADDRESS
*MacAddress
,
1174 OUT UINTN
*AddressSize
1178 Convert MAC address of the NIC associated with specified Service Binding Handle
1179 to a unicode string. Callers are responsible for freeing the string storage.
1181 Locate simple network protocol associated with the Service Binding Handle and
1182 get the mac address from SNP. Then convert the mac address into a unicode
1183 string. It takes 2 unicode characters to represent a 1 byte binary buffer.
1184 Plus one unicode character for the null-terminator.
1186 @param[in] ServiceHandle The handle where network service binding protocol is
1188 @param[in] ImageHandle The image handle used to act as the agent handle to
1189 get the simple network protocol. This parameter is
1190 optional and may be NULL.
1191 @param[out] MacString The pointer to store the address of the string
1192 representation of the mac address.
1194 @retval EFI_SUCCESS Converted the mac address a unicode string successfully.
1195 @retval EFI_OUT_OF_RESOURCES There are not enough memory resources.
1196 @retval Others Failed to open the simple network protocol.
1201 NetLibGetMacString (
1202 IN EFI_HANDLE ServiceHandle
,
1203 IN EFI_HANDLE ImageHandle
, OPTIONAL
1204 OUT CHAR16
**MacString
1208 Detect media status for specified network device.
1210 The underlying UNDI driver may or may not support reporting media status from
1211 GET_STATUS command (PXE_STATFLAGS_GET_STATUS_NO_MEDIA_SUPPORTED). This routine
1212 will try to invoke Snp->GetStatus() to get the media status. If media is already
1213 present, it returns directly. If media is not present, it will stop SNP and then
1214 restart SNP to get the latest media status. This provides an opportunity to get
1215 the correct media status for old UNDI driver, which doesn't support reporting
1216 media status from GET_STATUS command.
1217 Note: there are two limitations for the current algorithm:
1218 1) For UNDI with this capability, when the cable is not attached, there will
1219 be an redundant Stop/Start() process.
1220 2) for UNDI without this capability, in case that network cable is attached when
1221 Snp->Initialize() is invoked while network cable is unattached later,
1222 NetLibDetectMedia() will report MediaPresent as TRUE, causing upper layer
1223 apps to wait for timeout time.
1225 @param[in] ServiceHandle The handle where network service binding protocols are
1227 @param[out] MediaPresent The pointer to store the media status.
1229 @retval EFI_SUCCESS Media detection success.
1230 @retval EFI_INVALID_PARAMETER ServiceHandle is not a valid network device handle.
1231 @retval EFI_UNSUPPORTED The network device does not support media detection.
1232 @retval EFI_DEVICE_ERROR SNP is in an unknown state.
1238 IN EFI_HANDLE ServiceHandle
,
1239 OUT BOOLEAN
*MediaPresent
1243 Create an IPv4 device path node.
1245 The header type of IPv4 device path node is MESSAGING_DEVICE_PATH.
1246 The header subtype of IPv4 device path node is MSG_IPv4_DP.
1247 The length of the IPv4 device path node in bytes is 19.
1248 Get other information from parameters to make up the whole IPv4 device path node.
1250 @param[in, out] Node The pointer to the IPv4 device path node.
1251 @param[in] Controller The controller handle.
1252 @param[in] LocalIp The local IPv4 address.
1253 @param[in] LocalPort The local port.
1254 @param[in] RemoteIp The remote IPv4 address.
1255 @param[in] RemotePort The remote port.
1256 @param[in] Protocol The protocol type in the IP header.
1257 @param[in] UseDefaultAddress Whether this instance is using default address or not.
1262 NetLibCreateIPv4DPathNode (
1263 IN OUT IPv4_DEVICE_PATH
*Node
,
1264 IN EFI_HANDLE Controller
,
1265 IN IP4_ADDR LocalIp
,
1266 IN UINT16 LocalPort
,
1267 IN IP4_ADDR RemoteIp
,
1268 IN UINT16 RemotePort
,
1270 IN BOOLEAN UseDefaultAddress
1274 Create an IPv6 device path node.
1276 The header type of IPv6 device path node is MESSAGING_DEVICE_PATH.
1277 The header subtype of IPv6 device path node is MSG_IPv6_DP.
1278 The length of the IPv6 device path node in bytes is 43.
1279 Get other information from parameters to make up the whole IPv6 device path node.
1281 @param[in, out] Node The pointer to the IPv6 device path node.
1282 @param[in] Controller The controller handle.
1283 @param[in] LocalIp The local IPv6 address.
1284 @param[in] LocalPort The local port.
1285 @param[in] RemoteIp The remote IPv6 address.
1286 @param[in] RemotePort The remote port.
1287 @param[in] Protocol The protocol type in the IP header.
1292 NetLibCreateIPv6DPathNode (
1293 IN OUT IPv6_DEVICE_PATH
*Node
,
1294 IN EFI_HANDLE Controller
,
1295 IN EFI_IPv6_ADDRESS
*LocalIp
,
1296 IN UINT16 LocalPort
,
1297 IN EFI_IPv6_ADDRESS
*RemoteIp
,
1298 IN UINT16 RemotePort
,
1304 Find the UNDI/SNP handle from controller and protocol GUID.
1306 For example, IP will open an MNP child to transmit/receive
1307 packets. When MNP is stopped, IP should also be stopped. IP
1308 needs to find its own private data that is related the IP's
1309 service binding instance that is installed on the UNDI/SNP handle.
1310 The controller is then either an MNP or an ARP child handle. Note that
1311 IP opens these handles using BY_DRIVER. Use that information to get the
1314 @param[in] Controller The protocol handle to check.
1315 @param[in] ProtocolGuid The protocol that is related with the handle.
1317 @return The UNDI/SNP handle or NULL for errors.
1322 NetLibGetNicHandle (
1323 IN EFI_HANDLE Controller
,
1324 IN EFI_GUID
*ProtocolGuid
1328 This is the default unload handle for all the network drivers.
1330 Disconnect the driver specified by ImageHandle from all the devices in the handle database.
1331 Uninstall all the protocols installed in the driver entry point.
1333 @param[in] ImageHandle The drivers' driver image.
1335 @retval EFI_SUCCESS The image is unloaded.
1336 @retval Others Failed to unload the image.
1341 NetLibDefaultUnload (
1342 IN EFI_HANDLE ImageHandle
1346 Convert one Null-terminated ASCII string (decimal dotted) to EFI_IPv4_ADDRESS.
1348 @param[in] String The pointer to the Ascii string.
1349 @param[out] Ip4Address The pointer to the converted IPv4 address.
1351 @retval EFI_SUCCESS Converted to an IPv4 address successfully.
1352 @retval EFI_INVALID_PARAMETER The string is malformatted, or Ip4Address is NULL.
1357 NetLibAsciiStrToIp4 (
1358 IN CONST CHAR8
*String
,
1359 OUT EFI_IPv4_ADDRESS
*Ip4Address
1363 Convert one Null-terminated ASCII string to EFI_IPv6_ADDRESS. The format of the
1364 string is defined in RFC 4291 - Text Representation of Addresses.
1366 @param[in] String The pointer to the Ascii string.
1367 @param[out] Ip6Address The pointer to the converted IPv6 address.
1369 @retval EFI_SUCCESS Converted to an IPv6 address successfully.
1370 @retval EFI_INVALID_PARAMETER The string is malformatted, or Ip6Address is NULL.
1375 NetLibAsciiStrToIp6 (
1376 IN CONST CHAR8
*String
,
1377 OUT EFI_IPv6_ADDRESS
*Ip6Address
1381 Convert one Null-terminated Unicode string (decimal dotted) to EFI_IPv4_ADDRESS.
1383 @param[in] String The pointer to the Ascii string.
1384 @param[out] Ip4Address The pointer to the converted IPv4 address.
1386 @retval EFI_SUCCESS Converted to an IPv4 address successfully.
1387 @retval EFI_INVALID_PARAMETER The string is mal-formatted or Ip4Address is NULL.
1388 @retval EFI_OUT_OF_RESOURCES Failed to perform the operation due to lack of resources.
1394 IN CONST CHAR16
*String
,
1395 OUT EFI_IPv4_ADDRESS
*Ip4Address
1399 Convert one Null-terminated Unicode string to EFI_IPv6_ADDRESS. The format of
1400 the string is defined in RFC 4291 - Text Representation of Addresses.
1402 @param[in] String The pointer to the Ascii string.
1403 @param[out] Ip6Address The pointer to the converted IPv6 address.
1405 @retval EFI_SUCCESS Converted to an IPv6 address successfully.
1406 @retval EFI_INVALID_PARAMETER The string is malformatted or Ip6Address is NULL.
1407 @retval EFI_OUT_OF_RESOURCES Failed to perform the operation due to a lack of resources.
1413 IN CONST CHAR16
*String
,
1414 OUT EFI_IPv6_ADDRESS
*Ip6Address
1418 Convert one Null-terminated Unicode string to EFI_IPv6_ADDRESS and prefix length.
1419 The format of the string is defined in RFC 4291 - Text Representation of Addresses
1420 Prefixes: ipv6-address/prefix-length.
1422 @param[in] String The pointer to the Ascii string.
1423 @param[out] Ip6Address The pointer to the converted IPv6 address.
1424 @param[out] PrefixLength The pointer to the converted prefix length.
1426 @retval EFI_SUCCESS Converted to an IPv6 address successfully.
1427 @retval EFI_INVALID_PARAMETER The string is malformatted, or Ip6Address is NULL.
1428 @retval EFI_OUT_OF_RESOURCES Failed to perform the operation due to a lack of resources.
1433 NetLibStrToIp6andPrefix (
1434 IN CONST CHAR16
*String
,
1435 OUT EFI_IPv6_ADDRESS
*Ip6Address
,
1436 OUT UINT8
*PrefixLength
1441 Convert one EFI_IPv6_ADDRESS to Null-terminated Unicode string.
1442 The text representation of address is defined in RFC 4291.
1444 @param[in] Ip6Address The pointer to the IPv6 address.
1445 @param[out] String The buffer to return the converted string.
1446 @param[in] StringSize The length in bytes of the input String.
1448 @retval EFI_SUCCESS Convert to string successfully.
1449 @retval EFI_INVALID_PARAMETER The input parameter is invalid.
1450 @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small for the result. BufferSize has been
1451 updated with the size needed to complete the request.
1456 IN EFI_IPv6_ADDRESS
*Ip6Address
,
1462 // Various signatures
1464 #define NET_BUF_SIGNATURE SIGNATURE_32 ('n', 'b', 'u', 'f')
1465 #define NET_VECTOR_SIGNATURE SIGNATURE_32 ('n', 'v', 'e', 'c')
1466 #define NET_QUE_SIGNATURE SIGNATURE_32 ('n', 'b', 'q', 'u')
1469 #define NET_PROTO_DATA 64 // Opaque buffer for protocols
1470 #define NET_BUF_HEAD 1 // Trim or allocate space from head
1471 #define NET_BUF_TAIL 0 // Trim or allocate space from tail
1472 #define NET_VECTOR_OWN_FIRST 0x01 // We allocated the 1st block in the vector
1474 #define NET_CHECK_SIGNATURE(PData, SIGNATURE) \
1475 ASSERT (((PData) != NULL) && ((PData)->Signature == (SIGNATURE)))
1478 // Single memory block in the vector.
1481 UINT32 Len
; // The block's length
1482 UINT8
*Bulk
; // The block's Data
1485 typedef VOID (EFIAPI
*NET_VECTOR_EXT_FREE
) (VOID
*Arg
);
1488 //NET_VECTOR contains several blocks to hold all packet's
1489 //fragments and other house-keeping stuff for sharing. It
1490 //doesn't specify the where actual packet fragment begins.
1494 INTN RefCnt
; // Reference count to share NET_VECTOR.
1495 NET_VECTOR_EXT_FREE Free
; // external function to free NET_VECTOR
1496 VOID
*Arg
; // opaque argument to Free
1497 UINT32 Flag
; // Flags, NET_VECTOR_OWN_FIRST
1498 UINT32 Len
; // Total length of the associated BLOCKs
1505 //NET_BLOCK_OP operates on the NET_BLOCK. It specifies
1506 //where the actual fragment begins and ends
1509 UINT8
*BlockHead
; // Block's head, or the smallest valid Head
1510 UINT8
*BlockTail
; // Block's tail. BlockTail-BlockHead=block length
1511 UINT8
*Head
; // 1st byte of the data in the block
1512 UINT8
*Tail
; // Tail of the data in the block, Tail-Head=Size
1513 UINT32 Size
; // The size of the data
1518 EFI_IP6_HEADER
*Ip6
;
1522 //NET_BUF is the buffer manage structure used by the
1523 //network stack. Every network packet may be fragmented. The Vector points to
1524 //memory blocks used by each fragment, and BlockOp
1525 //specifies where each fragment begins and ends.
1527 //It also contains an opaque area for the protocol to store
1528 //per-packet information. Protocol must be careful not
1529 //to overwrite the members after that.
1534 LIST_ENTRY List
; // The List this NET_BUF is on
1536 NET_IP_HEAD Ip
; // Network layer header, for fast access
1537 TCP_HEAD
*Tcp
; // Transport layer header, for fast access
1538 EFI_UDP_HEADER
*Udp
; // User Datagram Protocol header
1539 UINT8 ProtoData
[NET_PROTO_DATA
]; //Protocol specific data
1541 NET_VECTOR
*Vector
; // The vector containing the packet
1543 UINT32 BlockOpNum
; // Total number of BlockOp in the buffer
1544 UINT32 TotalSize
; // Total size of the actual packet
1545 NET_BLOCK_OP BlockOp
[1]; // Specify the position of actual packet
1549 //A queue of NET_BUFs. It is a thin extension of
1550 //NET_BUF functions.
1555 LIST_ENTRY List
; // The List this buffer queue is on
1557 LIST_ENTRY BufList
; // list of queued buffers
1558 UINT32 BufSize
; // total length of DATA in the buffers
1559 UINT32 BufNum
; // total number of buffers on the chain
1563 // Pseudo header for TCP and UDP checksum
1575 EFI_IPv6_ADDRESS SrcIp
;
1576 EFI_IPv6_ADDRESS DstIp
;
1579 UINT32 NextHeader
:8;
1580 } NET_IP6_PSEUDO_HDR
;
1584 // The fragment entry table used in network interfaces. This is
1585 // the same as NET_BLOCK now. Use two different to distinguish
1586 // the two in case that NET_BLOCK be enhanced later.
1593 #define NET_GET_REF(PData) ((PData)->RefCnt++)
1594 #define NET_PUT_REF(PData) ((PData)->RefCnt--)
1595 #define NETBUF_FROM_PROTODATA(Info) BASE_CR((Info), NET_BUF, ProtoData)
1597 #define NET_BUF_SHARED(Buf) \
1598 (((Buf)->RefCnt > 1) || ((Buf)->Vector->RefCnt > 1))
1600 #define NET_VECTOR_SIZE(BlockNum) \
1601 (sizeof (NET_VECTOR) + ((BlockNum) - 1) * sizeof (NET_BLOCK))
1603 #define NET_BUF_SIZE(BlockOpNum) \
1604 (sizeof (NET_BUF) + ((BlockOpNum) - 1) * sizeof (NET_BLOCK_OP))
1606 #define NET_HEADSPACE(BlockOp) \
1607 (UINTN)((BlockOp)->Head - (BlockOp)->BlockHead)
1609 #define NET_TAILSPACE(BlockOp) \
1610 (UINTN)((BlockOp)->BlockTail - (BlockOp)->Tail)
1613 Allocate a single block NET_BUF. Upon allocation, all the
1614 free space is in the tail room.
1616 @param[in] Len The length of the block.
1618 @return The pointer to the allocated NET_BUF, or NULL if the
1619 allocation failed due to resource limitations.
1629 Free the net buffer and its associated NET_VECTOR.
1631 Decrease the reference count of the net buffer by one. Free the associated net
1632 vector and itself if the reference count of the net buffer is decreased to 0.
1633 The net vector free operation decreases the reference count of the net
1634 vector by one, and performs the resource free operation when the reference count
1635 of the net vector is 0.
1637 @param[in] Nbuf The pointer to the NET_BUF to be freed.
1647 Get the index of NET_BLOCK_OP that contains the byte at Offset in the net
1650 For example, this function can be used to retrieve the IP header in the packet. It
1651 also can be used to get the fragment that contains the byte used
1652 mainly by the library implementation itself.
1654 @param[in] Nbuf The pointer to the net buffer.
1655 @param[in] Offset The offset of the byte.
1656 @param[out] Index Index of the NET_BLOCK_OP that contains the byte at
1659 @return The pointer to the Offset'th byte of data in the net buffer, or NULL
1660 if there is no such data in the net buffer.
1668 OUT UINT32
*Index OPTIONAL
1672 Create a copy of the net buffer that shares the associated net vector.
1674 The reference count of the newly created net buffer is set to 1. The reference
1675 count of the associated net vector is increased by one.
1677 @param[in] Nbuf The pointer to the net buffer to be cloned.
1679 @return The pointer to the cloned net buffer, or NULL if the
1680 allocation failed due to resource limitations.
1690 Create a duplicated copy of the net buffer with data copied and HeadSpace
1691 bytes of head space reserved.
1693 The duplicated net buffer will allocate its own memory to hold the data of the
1696 @param[in] Nbuf The pointer to the net buffer to be duplicated from.
1697 @param[in, out] Duplicate The pointer to the net buffer to duplicate to. If
1698 NULL, a new net buffer is allocated.
1699 @param[in] HeadSpace The length of the head space to reserve.
1701 @return The pointer to the duplicated net buffer, or NULL if
1702 the allocation failed due to resource limitations.
1709 IN OUT NET_BUF
*Duplicate OPTIONAL
,
1714 Create a NET_BUF structure which contains Len byte data of Nbuf starting from
1717 A new NET_BUF structure will be created but the associated data in NET_VECTOR
1718 is shared. This function exists to perform IP packet fragmentation.
1720 @param[in] Nbuf The pointer to the net buffer to be extracted.
1721 @param[in] Offset Starting point of the data to be included in the new
1723 @param[in] Len The bytes of data to be included in the new net buffer.
1724 @param[in] HeadSpace The bytes of the head space to reserve for the protocol header.
1726 @return The pointer to the cloned net buffer, or NULL if the
1727 allocation failed due to resource limitations.
1740 Reserve some space in the header room of the net buffer.
1742 Upon allocation, all the space is in the tail room of the buffer. Call this
1743 function to move space to the header room. This function is quite limited
1744 in that it can only reserve space from the first block of an empty NET_BUF not
1745 built from the external. However, it should be enough for the network stack.
1747 @param[in, out] Nbuf The pointer to the net buffer.
1748 @param[in] Len The length of buffer to be reserved from the header.
1754 IN OUT NET_BUF
*Nbuf
,
1759 Allocate Len bytes of space from the header or tail of the buffer.
1761 @param[in, out] Nbuf The pointer to the net buffer.
1762 @param[in] Len The length of the buffer to be allocated.
1763 @param[in] FromHead The flag to indicate whether to reserve the data
1764 from head (TRUE) or tail (FALSE).
1766 @return The pointer to the first byte of the allocated buffer,
1767 or NULL, if there is no sufficient space.
1773 IN OUT NET_BUF
*Nbuf
,
1779 Trim Len bytes from the header or the tail of the net buffer.
1781 @param[in, out] Nbuf The pointer to the net buffer.
1782 @param[in] Len The length of the data to be trimmed.
1783 @param[in] FromHead The flag to indicate whether trim data is from the
1784 head (TRUE) or the tail (FALSE).
1786 @return The length of the actual trimmed data, which may be less
1787 than Len if the TotalSize of Nbuf is less than Len.
1793 IN OUT NET_BUF
*Nbuf
,
1799 Copy Len bytes of data from the specific offset of the net buffer to the
1802 The Len bytes of data may cross several fragments of the net buffer.
1804 @param[in] Nbuf The pointer to the net buffer.
1805 @param[in] Offset The sequence number of the first byte to copy.
1806 @param[in] Len The length of the data to copy.
1807 @param[in] Dest The destination of the data to copy to.
1809 @return The length of the actual copied data, or 0 if the offset
1810 specified exceeds the total size of net buffer.
1823 Build a NET_BUF from external blocks.
1825 A new NET_BUF structure will be created from external blocks. An additional block
1826 of memory will be allocated to hold reserved HeadSpace bytes of header room
1827 and existing HeadLen bytes of header, but the external blocks are shared by the
1828 net buffer to avoid data copying.
1830 @param[in] ExtFragment The pointer to the data block.
1831 @param[in] ExtNum The number of the data blocks.
1832 @param[in] HeadSpace The head space to be reserved.
1833 @param[in] HeadLen The length of the protocol header. The function
1834 pulls this amount of data into a linear block.
1835 @param[in] ExtFree The pointer to the caller-provided free function.
1836 @param[in] Arg The argument passed to ExtFree when ExtFree is
1839 @return The pointer to the net buffer built from the data blocks,
1840 or NULL if the allocation failed due to resource
1847 IN NET_FRAGMENT
*ExtFragment
,
1849 IN UINT32 HeadSpace
,
1851 IN NET_VECTOR_EXT_FREE ExtFree
,
1852 IN VOID
*Arg OPTIONAL
1856 Build a fragment table to contain the fragments in the net buffer. This is the
1857 opposite operation of the NetbufFromExt.
1859 @param[in] Nbuf Points to the net buffer.
1860 @param[in, out] ExtFragment The pointer to the data block.
1861 @param[in, out] ExtNum The number of the data blocks.
1863 @retval EFI_BUFFER_TOO_SMALL The number of non-empty blocks is bigger than
1865 @retval EFI_SUCCESS The fragment table was built successfully.
1872 IN OUT NET_FRAGMENT
*ExtFragment
,
1873 IN OUT UINT32
*ExtNum
1877 Build a net buffer from a list of net buffers.
1879 All the fragments will be collected from the list of NEW_BUF, and then a new
1880 net buffer will be created through NetbufFromExt.
1882 @param[in] BufList A List of the net buffer.
1883 @param[in] HeadSpace The head space to be reserved.
1884 @param[in] HeaderLen The length of the protocol header. The function
1885 pulls this amount of data into a linear block.
1886 @param[in] ExtFree The pointer to the caller provided free function.
1887 @param[in] Arg The argument passed to ExtFree when ExtFree is called.
1889 @return The pointer to the net buffer built from the list of net
1896 IN LIST_ENTRY
*BufList
,
1897 IN UINT32 HeadSpace
,
1898 IN UINT32 HeaderLen
,
1899 IN NET_VECTOR_EXT_FREE ExtFree
,
1900 IN VOID
*Arg OPTIONAL
1904 Free a list of net buffers.
1906 @param[in, out] Head The pointer to the head of linked net buffers.
1912 IN OUT LIST_ENTRY
*Head
1916 Initiate the net buffer queue.
1918 @param[in, out] NbufQue The pointer to the net buffer queue to be initialized.
1924 IN OUT NET_BUF_QUEUE
*NbufQue
1928 Allocate and initialize a net buffer queue.
1930 @return The pointer to the allocated net buffer queue, or NULL if the
1931 allocation failed due to resource limit.
1941 Free a net buffer queue.
1943 Decrease the reference count of the net buffer queue by one. The real resource
1944 free operation isn't performed until the reference count of the net buffer
1945 queue is decreased to 0.
1947 @param[in] NbufQue The pointer to the net buffer queue to be freed.
1953 IN NET_BUF_QUEUE
*NbufQue
1957 Remove a net buffer from the head in the specific queue and return it.
1959 @param[in, out] NbufQue The pointer to the net buffer queue.
1961 @return The pointer to the net buffer removed from the specific queue,
1962 or NULL if there is no net buffer in the specific queue.
1968 IN OUT NET_BUF_QUEUE
*NbufQue
1972 Append a net buffer to the net buffer queue.
1974 @param[in, out] NbufQue The pointer to the net buffer queue.
1975 @param[in, out] Nbuf The pointer to the net buffer to be appended.
1981 IN OUT NET_BUF_QUEUE
*NbufQue
,
1982 IN OUT NET_BUF
*Nbuf
1986 Copy Len bytes of data from the net buffer queue at the specific offset to the
1989 The copying operation is the same as NetbufCopy, but applies to the net buffer
1990 queue instead of the net buffer.
1992 @param[in] NbufQue The pointer to the net buffer queue.
1993 @param[in] Offset The sequence number of the first byte to copy.
1994 @param[in] Len The length of the data to copy.
1995 @param[out] Dest The destination of the data to copy to.
1997 @return The length of the actual copied data, or 0 if the offset
1998 specified exceeds the total size of net buffer queue.
2004 IN NET_BUF_QUEUE
*NbufQue
,
2011 Trim Len bytes of data from the buffer queue and free any net buffer
2012 that is completely trimmed.
2014 The trimming operation is the same as NetbufTrim but applies to the net buffer
2015 queue instead of the net buffer.
2017 @param[in, out] NbufQue The pointer to the net buffer queue.
2018 @param[in] Len The length of the data to trim.
2020 @return The actual length of the data trimmed.
2026 IN OUT NET_BUF_QUEUE
*NbufQue
,
2032 Flush the net buffer queue.
2034 @param[in, out] NbufQue The pointer to the queue to be flushed.
2040 IN OUT NET_BUF_QUEUE
*NbufQue
2044 Compute the checksum for a bulk of data.
2046 @param[in] Bulk The pointer to the data.
2047 @param[in] Len The length of the data, in bytes.
2049 @return The computed checksum.
2062 @param[in] Checksum1 The first checksum to be added.
2063 @param[in] Checksum2 The second checksum to be added.
2065 @return The new checksum.
2071 IN UINT16 Checksum1
,
2076 Compute the checksum for a NET_BUF.
2078 @param[in] Nbuf The pointer to the net buffer.
2080 @return The computed checksum.
2090 Compute the checksum for TCP/UDP pseudo header.
2092 Src and Dst are in network byte order, and Len is in host byte order.
2094 @param[in] Src The source address of the packet.
2095 @param[in] Dst The destination address of the packet.
2096 @param[in] Proto The protocol type of the packet.
2097 @param[in] Len The length of the packet.
2099 @return The computed checksum.
2104 NetPseudoHeadChecksum (
2112 Compute the checksum for the TCP6/UDP6 pseudo header.
2114 Src and Dst are in network byte order, and Len is in host byte order.
2116 @param[in] Src The source address of the packet.
2117 @param[in] Dst The destination address of the packet.
2118 @param[in] NextHeader The protocol type of the packet.
2119 @param[in] Len The length of the packet.
2121 @return The computed checksum.
2126 NetIp6PseudoHeadChecksum (
2127 IN EFI_IPv6_ADDRESS
*Src
,
2128 IN EFI_IPv6_ADDRESS
*Dst
,
2129 IN UINT8 NextHeader
,
2134 The function frees the net buffer which allocated by the IP protocol. It releases
2135 only the net buffer and doesn't call the external free function.
2137 This function should be called after finishing the process of mIpSec->ProcessExt()
2138 for outbound traffic. The (EFI_IPSEC2_PROTOCOL)->ProcessExt() allocates a new
2139 buffer for the ESP, so there needs a function to free the old net buffer.
2141 @param[in] Nbuf The network buffer to be freed.
2145 NetIpSecNetbufFree (
2150 This function obtains the system guid from the smbios table.
2152 @param[out] SystemGuid The pointer of the returned system guid.
2154 @retval EFI_SUCCESS Successfully obtained the system guid.
2155 @retval EFI_NOT_FOUND Did not find the SMBIOS table.
2160 NetLibGetSystemGuid (
2161 OUT EFI_GUID
*SystemGuid
2165 Create Dns QName according the queried domain name.
2166 QName is a domain name represented as a sequence of labels,
2167 where each label consists of a length octet followed by that
2168 number of octets. The QName terminates with the zero
2169 length octet for the null label of the root. Caller should
2170 take responsibility to free the buffer in returned pointer.
2172 @param DomainName The pointer to the queried domain name string.
2174 @retval NULL Failed to fill QName.
2175 @return QName filled successfully.
2180 NetLibCreateDnsQName (
2181 IN CHAR16
*DomainName