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1 | /** @file\r |
2 | Routines for HttpDxe driver to perform DNS resolution based on UEFI DNS protocols.\r | |
3 | \r | |
4 | Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "HttpDriver.h"\r | |
16 | \r | |
17 | /**\r | |
18 | Retrieve the host address using the EFI_DNS4_PROTOCOL.\r | |
19 | \r | |
20 | @param[in] HttpInstance Pointer to HTTP_PROTOCOL instance.\r | |
21 | @param[in] HostName Pointer to buffer containing hostname.\r | |
22 | @param[out] IpAddress On output, pointer to buffer containing IPv4 address.\r | |
23 | \r | |
24 | @retval EFI_SUCCESS Operation succeeded.\r | |
25 | @retval EFI_OUT_OF_RESOURCES Failed to allocate needed resources.\r | |
26 | @retval EFI_DEVICE_ERROR An unexpected network error occurred.\r | |
27 | @retval Others Other errors as indicated.\r | |
28 | \r | |
29 | **/\r | |
30 | EFI_STATUS\r | |
31 | HttpDns4 (\r | |
32 | IN HTTP_PROTOCOL *HttpInstance,\r | |
33 | IN CHAR16 *HostName,\r | |
34 | OUT EFI_IPv4_ADDRESS *IpAddress \r | |
35 | )\r | |
36 | {\r | |
37 | EFI_STATUS Status;\r | |
38 | EFI_DNS4_PROTOCOL *Dns4;\r | |
39 | EFI_DNS4_CONFIG_DATA Dns4CfgData;\r | |
40 | EFI_DNS4_COMPLETION_TOKEN Token;\r | |
41 | BOOLEAN IsDone;\r | |
42 | HTTP_SERVICE *Service;\r | |
43 | EFI_HANDLE Dns4Handle;\r | |
44 | EFI_IP4_CONFIG2_PROTOCOL *Ip4Config2;\r | |
45 | UINTN DnsServerListCount;\r | |
46 | EFI_IPv4_ADDRESS *DnsServerList;\r | |
47 | UINTN DataSize;\r | |
48 | \r | |
49 | \r | |
50 | Service = HttpInstance->Service;\r | |
51 | ASSERT (Service != NULL);\r | |
52 | \r | |
53 | DnsServerList = NULL;\r | |
54 | DnsServerListCount = 0;\r | |
55 | ZeroMem (&Token, sizeof (EFI_DNS4_COMPLETION_TOKEN));\r | |
56 | \r | |
57 | //\r | |
58 | // Get DNS server list from EFI IPv4 Configuration II protocol.\r | |
59 | //\r | |
60 | Status = gBS->HandleProtocol (Service->ControllerHandle, &gEfiIp4Config2ProtocolGuid, (VOID **) &Ip4Config2);\r | |
61 | if (!EFI_ERROR (Status)) {\r | |
62 | //\r | |
63 | // Get the required size.\r | |
64 | //\r | |
65 | DataSize = 0;\r | |
66 | Status = Ip4Config2->GetData (Ip4Config2, Ip4Config2DataTypeDnsServer, &DataSize, NULL);\r | |
67 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
68 | DnsServerList = AllocatePool (DataSize);\r | |
69 | if (DnsServerList == NULL) {\r | |
70 | return EFI_OUT_OF_RESOURCES;\r | |
71 | }\r | |
72 | \r | |
73 | Status = Ip4Config2->GetData (Ip4Config2, Ip4Config2DataTypeDnsServer, &DataSize, DnsServerList);\r | |
74 | if (EFI_ERROR (Status)) {\r | |
75 | FreePool (DnsServerList);\r | |
76 | DnsServerList = NULL;\r | |
77 | } else {\r | |
78 | DnsServerListCount = DataSize / sizeof (EFI_IPv4_ADDRESS);\r | |
79 | }\r | |
80 | }\r | |
81 | }\r | |
82 | \r | |
83 | Dns4Handle = NULL;\r | |
84 | Dns4 = NULL;\r | |
85 | \r | |
86 | //\r | |
87 | // Create a DNS child instance and get the protocol.\r | |
88 | //\r | |
89 | Status = NetLibCreateServiceChild (\r | |
90 | Service->ControllerHandle,\r | |
91 | Service->ImageHandle,\r | |
92 | &gEfiDns4ServiceBindingProtocolGuid,\r | |
93 | &Dns4Handle\r | |
94 | );\r | |
95 | if (EFI_ERROR (Status)) {\r | |
96 | goto Exit;\r | |
97 | } \r | |
98 | \r | |
99 | Status = gBS->OpenProtocol (\r | |
100 | Dns4Handle,\r | |
101 | &gEfiDns4ProtocolGuid,\r | |
102 | (VOID **) &Dns4,\r | |
103 | Service->ImageHandle,\r | |
104 | Service->ControllerHandle,\r | |
105 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
106 | );\r | |
107 | if (EFI_ERROR (Status)) {\r | |
108 | goto Exit;\r | |
109 | }\r | |
110 | \r | |
111 | //\r | |
112 | // Configure DNS4 instance for the DNS server address and protocol.\r | |
113 | //\r | |
114 | ZeroMem (&Dns4CfgData, sizeof (Dns4CfgData));\r | |
115 | Dns4CfgData.DnsServerListCount = DnsServerListCount;\r | |
116 | Dns4CfgData.DnsServerList = DnsServerList;\r | |
117 | Dns4CfgData.UseDefaultSetting = HttpInstance->IPv4Node.UseDefaultAddress;\r | |
118 | if (!Dns4CfgData.UseDefaultSetting) {\r | |
119 | IP4_COPY_ADDRESS (&Dns4CfgData.StationIp, &HttpInstance->IPv4Node.LocalAddress);\r | |
120 | IP4_COPY_ADDRESS (&Dns4CfgData.SubnetMask, &HttpInstance->IPv4Node.LocalSubnet);\r | |
121 | }\r | |
122 | Dns4CfgData.EnableDnsCache = TRUE;\r | |
123 | Dns4CfgData.Protocol = EFI_IP_PROTO_UDP;\r | |
124 | Status = Dns4->Configure (\r | |
125 | Dns4,\r | |
126 | &Dns4CfgData\r | |
127 | );\r | |
128 | if (EFI_ERROR (Status)) {\r | |
129 | goto Exit;\r | |
130 | }\r | |
131 | \r | |
132 | //\r | |
133 | // Create event to set the is done flag when name resolution is finished.\r | |
134 | //\r | |
135 | ZeroMem (&Token, sizeof (Token));\r | |
136 | Status = gBS->CreateEvent (\r | |
137 | EVT_NOTIFY_SIGNAL,\r | |
138 | TPL_NOTIFY,\r | |
139 | HttpCommonNotify,\r | |
140 | &IsDone,\r | |
141 | &Token.Event\r | |
142 | );\r | |
143 | if (EFI_ERROR (Status)) {\r | |
144 | goto Exit;\r | |
145 | }\r | |
146 | \r | |
147 | //\r | |
148 | // Start asynchronous name resolution.\r | |
149 | //\r | |
150 | Token.Status = EFI_NOT_READY;\r | |
151 | IsDone = FALSE;\r | |
152 | Status = Dns4->HostNameToIp (Dns4, HostName, &Token);\r | |
153 | if (EFI_ERROR (Status)) {\r | |
154 | goto Exit;\r | |
155 | }\r | |
156 | \r | |
157 | while (!IsDone) {\r | |
158 | Dns4->Poll (Dns4);\r | |
159 | }\r | |
160 | \r | |
161 | //\r | |
162 | // Name resolution is done, check result.\r | |
163 | //\r | |
164 | Status = Token.Status; \r | |
165 | if (!EFI_ERROR (Status)) {\r | |
166 | if (Token.RspData.H2AData == NULL) {\r | |
167 | Status = EFI_DEVICE_ERROR;\r | |
168 | goto Exit;\r | |
169 | }\r | |
170 | if (Token.RspData.H2AData->IpCount == 0 || Token.RspData.H2AData->IpList == NULL) {\r | |
171 | Status = EFI_DEVICE_ERROR;\r | |
172 | goto Exit;\r | |
173 | }\r | |
174 | //\r | |
175 | // We just return the first IP address from DNS protocol.\r | |
176 | //\r | |
177 | IP4_COPY_ADDRESS (IpAddress, Token.RspData.H2AData->IpList);\r | |
178 | Status = EFI_SUCCESS;\r | |
179 | }\r | |
180 | \r | |
181 | Exit:\r | |
182 | \r | |
183 | if (Token.Event != NULL) {\r | |
184 | gBS->CloseEvent (Token.Event);\r | |
185 | }\r | |
186 | if (Token.RspData.H2AData != NULL) {\r | |
187 | if (Token.RspData.H2AData->IpList != NULL) {\r | |
188 | FreePool (Token.RspData.H2AData->IpList);\r | |
189 | }\r | |
190 | FreePool (Token.RspData.H2AData);\r | |
191 | }\r | |
192 | \r | |
193 | if (Dns4 != NULL) {\r | |
194 | Dns4->Configure (Dns4, NULL);\r | |
195 | \r | |
196 | gBS->CloseProtocol (\r | |
197 | Dns4Handle,\r | |
198 | &gEfiDns4ProtocolGuid,\r | |
199 | Service->ImageHandle,\r | |
200 | Service->ControllerHandle\r | |
201 | );\r | |
202 | }\r | |
203 | \r | |
204 | if (Dns4Handle != NULL) {\r | |
205 | NetLibDestroyServiceChild (\r | |
206 | Service->ControllerHandle,\r | |
207 | Service->ImageHandle,\r | |
208 | &gEfiDns4ServiceBindingProtocolGuid,\r | |
209 | Dns4Handle\r | |
210 | );\r | |
211 | }\r | |
212 | \r | |
213 | if (DnsServerList != NULL) {\r | |
214 | FreePool (DnsServerList);\r | |
215 | }\r | |
216 | \r | |
217 | return Status;\r | |
218 | }\r |