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83cbd279 | 1 | /** @file\r |
3e8c18da | 2 | EFI DHCP protocol implementation.\r |
3 | RFCs supported are:\r | |
4 | RFC 2131: Dynamic Host Configuration Protocol\r | |
5 | RFC 2132: DHCP Options and BOOTP Vendor Extensions\r | |
6 | RFC 1534: Interoperation Between DHCP and BOOTP\r | |
7 | RFC 3396: Encoding Long Options in DHCP.\r | |
d1102dba | 8 | \r |
479a3b60 | 9 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9d510e61 | 10 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
83cbd279 | 11 | \r |
83cbd279 | 12 | **/\r |
13 | \r | |
14 | #ifndef __EFI_DHCP4_IMPL_H__\r | |
15 | #define __EFI_DHCP4_IMPL_H__\r | |
16 | \r | |
17 | \r | |
772db4bb | 18 | \r |
2517435c | 19 | #include <Uefi.h>\r |
772db4bb | 20 | \r |
21 | #include <Protocol/Dhcp4.h>\r | |
22 | #include <Protocol/Udp4.h>\r | |
ac6c3d90 | 23 | #include <IndustryStandard/Dhcp.h>\r |
772db4bb | 24 | #include <Library/DebugLib.h>\r |
25 | #include <Library/UefiDriverEntryPoint.h>\r | |
26 | #include <Library/UefiBootServicesTableLib.h>\r | |
27 | #include <Library/UefiLib.h>\r | |
83cbd279 | 28 | #include <Library/BaseLib.h>\r |
29 | #include <Library/NetLib.h>\r | |
30 | \r | |
31 | typedef struct _DHCP_SERVICE DHCP_SERVICE;\r | |
32 | typedef struct _DHCP_PROTOCOL DHCP_PROTOCOL;\r | |
33 | \r | |
34 | #include "Dhcp4Option.h"\r | |
35 | #include "Dhcp4Io.h"\r | |
36 | \r | |
f3f2e05d | 37 | #define DHCP_SERVICE_SIGNATURE SIGNATURE_32 ('D', 'H', 'C', 'P')\r |
38 | #define DHCP_PROTOCOL_SIGNATURE SIGNATURE_32 ('d', 'h', 'c', 'p')\r | |
83cbd279 | 39 | \r |
8ce6b650 | 40 | #define DHCP_CHECK_MEDIA_WAITING_TIME EFI_TIMER_PERIOD_SECONDS(20)\r |
f6b7393c | 41 | \r |
42 | //\r | |
43 | // The state of the DHCP service. It starts as UNCONFIGED. If\r | |
44 | // and active child configures the service successfully, it\r | |
45 | // goes to CONFIGED. If the active child configures NULL, it\r | |
75dce340 | 46 | // goes back to UNCONFIGED. It becomes DESTROY if it is (partly)\r |
47 | // destroyed.\r | |
f6b7393c | 48 | //\r |
49 | #define DHCP_UNCONFIGED 0\r | |
50 | #define DHCP_CONFIGED 1\r | |
75dce340 | 51 | #define DHCP_DESTROY 2\r |
f6b7393c | 52 | \r |
83cbd279 | 53 | \r |
54 | struct _DHCP_PROTOCOL {\r | |
55 | UINT32 Signature;\r | |
56 | EFI_DHCP4_PROTOCOL Dhcp4Protocol;\r | |
e48e37fc | 57 | LIST_ENTRY Link;\r |
83cbd279 | 58 | EFI_HANDLE Handle;\r |
59 | DHCP_SERVICE *Service;\r | |
60 | \r | |
75dce340 | 61 | BOOLEAN InDestroy;\r |
83cbd279 | 62 | \r |
63 | EFI_EVENT CompletionEvent;\r | |
64 | EFI_EVENT RenewRebindEvent;\r | |
65 | \r | |
66 | EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN *Token;\r | |
b45b45b2 | 67 | UDP_IO *UdpIo; // The UDP IO used for TransmitReceive.\r |
c4a62a12 | 68 | UINT32 Timeout;\r |
842d83d6 | 69 | UINT16 ElaspedTime;\r |
c4a62a12 | 70 | NET_BUF_QUEUE ResponseQueue;\r |
83cbd279 | 71 | };\r |
72 | \r | |
73 | //\r | |
74 | // DHCP driver is specical in that it is a singleton. Although it\r | |
75 | // has a service binding, there can be only one active child.\r | |
76 | //\r | |
77 | struct _DHCP_SERVICE {\r | |
78 | UINT32 Signature;\r | |
79 | EFI_SERVICE_BINDING_PROTOCOL ServiceBinding;\r | |
80 | \r | |
75dce340 | 81 | INTN ServiceState; // CONFIGED, UNCONFIGED, and DESTROY\r |
83cbd279 | 82 | \r |
83 | EFI_HANDLE Controller;\r | |
84 | EFI_HANDLE Image;\r | |
85 | \r | |
e48e37fc | 86 | LIST_ENTRY Children;\r |
83cbd279 | 87 | UINTN NumChildren;\r |
88 | \r | |
89 | INTN DhcpState;\r | |
90 | EFI_STATUS IoStatus; // the result of last user operation\r | |
91 | UINT32 Xid;\r | |
92 | \r | |
93 | IP4_ADDR ClientAddr; // lease IP or configured client address\r | |
94 | IP4_ADDR Netmask;\r | |
95 | IP4_ADDR ServerAddr;\r | |
96 | \r | |
97 | EFI_DHCP4_PACKET *LastOffer; // The last received offer\r | |
98 | EFI_DHCP4_PACKET *Selected;\r | |
99 | DHCP_PARAMETER *Para;\r | |
100 | \r | |
101 | UINT32 Lease;\r | |
102 | UINT32 T1;\r | |
103 | UINT32 T2;\r | |
104 | INTN ExtraRefresh; // This refresh is reqested by user\r | |
105 | \r | |
b45b45b2 | 106 | UDP_IO *UdpIo; // Udp child receiving all DHCP message\r |
107 | UDP_IO *LeaseIoPort; // Udp child with lease IP\r | |
434ce3fe | 108 | EFI_DHCP4_PACKET *LastPacket; // The last sent packet for retransmission\r |
83cbd279 | 109 | EFI_MAC_ADDRESS Mac;\r |
110 | UINT8 HwType;\r | |
111 | UINT8 HwLen;\r | |
982a9eae | 112 | UINT8 ClientAddressSendOut[16];\r |
83cbd279 | 113 | \r |
114 | DHCP_PROTOCOL *ActiveChild;\r | |
115 | EFI_DHCP4_CONFIG_DATA ActiveConfig;\r | |
116 | UINT32 UserOptionLen;\r | |
117 | \r | |
118 | //\r | |
119 | // Timer event and various timer\r | |
120 | //\r | |
121 | EFI_EVENT Timer;\r | |
122 | \r | |
123 | UINT32 PacketToLive; // Retransmission timer for our packets\r | |
434ce3fe | 124 | UINT32 LastTimeout; // Record the init value of PacketToLive every time\r |
83cbd279 | 125 | INTN CurRetry;\r |
126 | INTN MaxRetries;\r | |
83cbd279 | 127 | UINT32 LeaseLife;\r |
128 | };\r | |
129 | \r | |
130 | typedef struct {\r | |
131 | EFI_DHCP4_PACKET_OPTION **Option;\r | |
132 | UINT32 OptionCount;\r | |
133 | UINT32 Index;\r | |
134 | } DHCP_PARSE_CONTEXT;\r | |
135 | \r | |
136 | #define DHCP_INSTANCE_FROM_THIS(Proto) \\r | |
137 | CR ((Proto), DHCP_PROTOCOL, Dhcp4Protocol, DHCP_PROTOCOL_SIGNATURE)\r | |
138 | \r | |
139 | #define DHCP_SERVICE_FROM_THIS(Sb) \\r | |
140 | CR ((Sb), DHCP_SERVICE, ServiceBinding, DHCP_SERVICE_SIGNATURE)\r | |
141 | \r | |
142 | extern EFI_DHCP4_PROTOCOL mDhcp4ProtocolTemplate;\r | |
143 | \r | |
7bce0c5a | 144 | /**\r |
145 | Give up the control of the DHCP service to let other child\r | |
146 | resume. Don't change the service's DHCP state and the Client\r | |
147 | address and option list configure as required by RFC2131.\r | |
148 | \r | |
149 | @param DhcpSb The DHCP service instance.\r | |
150 | \r | |
7bce0c5a | 151 | **/\r |
83cbd279 | 152 | VOID\r |
153 | DhcpYieldControl (\r | |
ed729a0c | 154 | IN DHCP_SERVICE *DhcpSb\r |
83cbd279 | 155 | );\r |
156 | \r | |
ed729a0c | 157 | /**\r |
158 | Complete a Dhcp4 transaction and signal the upper layer.\r | |
235eaa63 | 159 | \r |
ed729a0c | 160 | @param Instance Dhcp4 instance.\r |
ed729a0c | 161 | \r |
162 | **/\r | |
c4a62a12 | 163 | VOID\r |
164 | PxeDhcpDone (\r | |
165 | IN DHCP_PROTOCOL *Instance\r | |
166 | );\r | |
167 | \r | |
235eaa63 | 168 | /**\r |
169 | Free the resource related to the configure parameters.\r | |
170 | DHCP driver will make a copy of the user's configure\r | |
171 | such as the time out value.\r | |
172 | \r | |
173 | @param Config The DHCP configure data\r | |
174 | \r | |
175 | **/\r | |
176 | VOID\r | |
177 | DhcpCleanConfigure (\r | |
178 | IN OUT EFI_DHCP4_CONFIG_DATA *Config\r | |
179 | );\r | |
180 | \r | |
479a3b60 WF |
181 | /**\r |
182 | Callback of Dhcp packet. Does nothing.\r | |
183 | \r | |
184 | @param Arg The context.\r | |
185 | \r | |
186 | **/\r | |
187 | VOID\r | |
188 | EFIAPI\r | |
189 | DhcpDummyExtFree (\r | |
190 | IN VOID *Arg\r | |
191 | );\r | |
192 | \r | |
842d83d6 | 193 | /**\r |
194 | Set the elapsed time based on the given instance and the pointer to the\r | |
195 | elapsed time option.\r | |
196 | \r | |
197 | @param[in] Elapsed The pointer to the position to append.\r | |
198 | @param[in] Instance The pointer to the Dhcp4 instance.\r | |
199 | **/\r | |
200 | VOID\r | |
201 | SetElapsedTime (\r | |
202 | IN UINT16 *Elapsed,\r | |
203 | IN DHCP_PROTOCOL *Instance\r | |
204 | );\r | |
205 | \r | |
83cbd279 | 206 | #endif\r |