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1 | /** @file\r |
2 | \r |
3 | Copyright (c) 2004, Intel Corporation\r |
4 | All rights reserved. This program and the accompanying materials\r |
5 | are licensed and made available under the terms and conditions of the BSD License\r |
6 | which accompanies this distribution. The full text of the license may be found at\r |
7 | http://opensource.org/licenses/bsd-license.php\r |
8 | \r |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
11 | \r |
12 | Module Name:\r |
13 | PxeDhcp4Setup.c\r |
14 | \r |
15 | Abstract:\r |
16 | \r |
17 | \r |
18 | **/\r |
19 | \r |
20 | #include "PxeDhcp4.h"\r |
21 | \r |
22 | /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */\r |
23 | EFI_STATUS\r |
24 | EFIAPI\r |
25 | PxeDhcp4Setup (\r |
26 | IN EFI_PXE_DHCP4_PROTOCOL *This,\r |
27 | IN EFI_PXE_DHCP4_DATA *Data\r |
28 | )\r |
29 | {\r |
30 | PXE_DHCP4_PRIVATE_DATA *Private;\r |
31 | DHCP4_HEADER *Packet;\r |
32 | EFI_STATUS EfiStatus;\r |
33 | UINT8 *OpLen;\r |
34 | UINT8 *OpPtr;\r |
35 | \r |
36 | //\r |
37 | // Return error if parameters are invalid.\r |
38 | //\r |
39 | if (This == NULL) {\r |
40 | return EFI_INVALID_PARAMETER;\r |
41 | }\r |
42 | \r |
43 | Private = PXE_DHCP4_PRIVATE_DATA_FROM_THIS (This);\r |
44 | \r |
45 | if (Private == NULL) {\r |
46 | return EFI_INVALID_PARAMETER;\r |
47 | }\r |
48 | \r |
49 | if (This->Data != NULL) {\r |
50 | return EFI_ALREADY_STARTED;\r |
51 | }\r |
52 | \r |
53 | if (Private->PxeBc == NULL) {\r |
54 | return EFI_DEVICE_ERROR;\r |
55 | }\r |
56 | //\r |
57 | // Check contents of provided Data structure.\r |
58 | //\r |
59 | if (Data != NULL) {\r |
60 | //\r |
61 | // Do protocol state checks first.\r |
62 | //\r |
63 | if (Data->SelectCompleted) {\r |
64 | if (!Data->InitCompleted || !Data->SetupCompleted) {\r |
65 | return EFI_INVALID_PARAMETER;\r |
66 | }\r |
67 | \r |
68 | if (Data->IsBootp && !Data->IsAck) {\r |
69 | return EFI_INVALID_PARAMETER;\r |
70 | }\r |
71 | } else if (Data->InitCompleted) {\r |
72 | if (!Data->SetupCompleted || Data->IsBootp || Data->IsAck) {\r |
73 | return EFI_INVALID_PARAMETER;\r |
74 | }\r |
75 | } else if (Data->SetupCompleted) {\r |
76 | if (Data->IsBootp || Data->IsAck) {\r |
77 | return EFI_INVALID_PARAMETER;\r |
78 | }\r |
79 | }\r |
80 | //\r |
81 | // Do packet content checks.\r |
82 | //\r |
83 | if (Data->SetupCompleted) {\r |
84 | //\r |
85 | // %%TBD - check discover packet\r |
86 | //\r |
87 | }\r |
88 | \r |
89 | if (Data->SelectCompleted) {\r |
90 | if (Data->IsBootp) {\r |
91 | //\r |
92 | // %%TBD - check offer packet\r |
93 | //\r |
94 | if (CompareMem (\r |
95 | &Data->Discover,\r |
96 | &Data->Request,\r |
97 | sizeof (DHCP4_PACKET)\r |
98 | )) {\r |
99 | return EFI_INVALID_PARAMETER;\r |
100 | }\r |
101 | \r |
102 | if (CompareMem (\r |
103 | &Data->Offer,\r |
104 | &Data->AckNak,\r |
105 | sizeof (DHCP4_PACKET)\r |
106 | )) {\r |
107 | return EFI_INVALID_PARAMETER;\r |
108 | }\r |
109 | } else {\r |
110 | //\r |
111 | // %%TBD - check offer, request & acknak packets\r |
112 | //\r |
113 | }\r |
114 | }\r |
115 | }\r |
116 | //\r |
117 | // Allocate data structure. Return error\r |
118 | // if there is not enough available memory.\r |
119 | //\r |
120 | This->Data = AllocatePool (sizeof (EFI_PXE_DHCP4_DATA));\r |
121 | if (This->Data == NULL) {\r |
122 | return EFI_OUT_OF_RESOURCES;\r |
123 | }\r |
124 | //\r |
125 | // Start PxeBc because we want to use its UdpWrite, UdpRead and\r |
126 | // SetFilter calls.\r |
127 | //\r |
128 | EfiStatus = Private->PxeBc->Start (Private->PxeBc, FALSE);\r |
129 | \r |
130 | if (EFI_ERROR (EfiStatus)) {\r |
131 | if (EfiStatus != EFI_ALREADY_STARTED) {\r |
132 | FreePool (This->Data);\r |
133 | This->Data = NULL;\r |
134 | Private->PxeBc->Stop (Private->PxeBc);\r |
135 | return EfiStatus;\r |
136 | }\r |
137 | \r |
138 | Private->StopPxeBc = FALSE;\r |
139 | } else {\r |
140 | Private->StopPxeBc = TRUE;\r |
141 | }\r |
142 | //\r |
143 | // Use new data.\r |
144 | //\r |
145 | if (Data != NULL) {\r |
146 | CopyMem (This->Data, Data, sizeof (EFI_PXE_DHCP4_DATA));\r |
147 | return EFI_SUCCESS;\r |
148 | }\r |
149 | //\r |
150 | // Initialize new public data structure.\r |
151 | //\r |
152 | ZeroMem (This->Data, sizeof (EFI_PXE_DHCP4_DATA));\r |
153 | \r |
154 | //\r |
155 | // Fill in default DHCP discover packet.\r |
156 | // Check for MAC addresses of strange lengths, just in case.\r |
157 | //\r |
158 | Packet = &This->Data->Discover.dhcp4;\r |
159 | \r |
160 | Packet->op = BOOTP_REQUEST;\r |
161 | \r |
162 | Packet->htype = Private->Snp->Mode->IfType;\r |
163 | \r |
164 | if (Private->Snp->Mode->HwAddressSize > 16) {\r |
165 | Packet->hlen = 16;\r |
166 | } else {\r |
167 | Packet->hlen = (UINT8) Private->Snp->Mode->HwAddressSize;\r |
168 | }\r |
169 | \r |
170 | Packet->hops = 0; /* Set to zero per RFC 2131. */\r |
171 | \r |
172 | if (Packet->hlen < sizeof Packet->xid) {\r |
173 | if (Packet->hlen != 0) {\r |
174 | CopyMem (\r |
175 | &Packet->xid,\r |
176 | &Private->Snp->Mode->CurrentAddress,\r |
177 | Packet->hlen\r |
178 | );\r |
179 | }\r |
180 | } else {\r |
181 | CopyMem (\r |
182 | &Packet->xid,\r |
183 | &Private->Snp->Mode->CurrentAddress.Addr[Packet->hlen - sizeof Packet->xid],\r |
184 | sizeof Packet->xid\r |
185 | );\r |
186 | }\r |
187 | //\r |
188 | // %%TBD - xid should be randomized\r |
189 | //\r |
190 | Packet->secs = htons (DHCP4_INITIAL_SECONDS);\r |
191 | \r |
192 | Packet->flags = htons (DHCP4_BROADCAST_FLAG);\r |
193 | \r |
194 | if (Packet->hlen != 0) {\r |
195 | CopyMem (Packet->chaddr, &Private->Snp->Mode->CurrentAddress, Packet->hlen);\r |
196 | }\r |
197 | \r |
198 | Packet->magik = htonl (DHCP4_MAGIK_NUMBER);\r |
199 | \r |
200 | OpPtr = Packet->options;\r |
201 | \r |
202 | *OpPtr++ = DHCP4_MESSAGE_TYPE;\r |
203 | *OpPtr++ = 1;\r |
204 | *OpPtr++ = DHCP4_MESSAGE_TYPE_DISCOVER;\r |
205 | \r |
206 | *OpPtr++ = DHCP4_MAX_MESSAGE_SIZE;\r |
207 | *OpPtr++ = 2;\r |
208 | *OpPtr++ = (UINT8) ((DHCP4_DEFAULT_MAX_MESSAGE_SIZE >> 8) & 0xFF);\r |
209 | *OpPtr++ = (UINT8) (DHCP4_DEFAULT_MAX_MESSAGE_SIZE & 0xFF);\r |
210 | \r |
211 | *OpPtr++ = DHCP4_PARAMETER_REQUEST_LIST;\r |
212 | OpLen = OpPtr;\r |
213 | *OpPtr++ = 0;\r |
214 | *OpPtr++ = DHCP4_SUBNET_MASK;\r |
215 | *OpPtr++ = DHCP4_TIME_OFFSET;\r |
216 | *OpPtr++ = DHCP4_ROUTER_LIST;\r |
217 | *OpPtr++ = DHCP4_TIME_SERVERS;\r |
218 | *OpPtr++ = DHCP4_NAME_SERVERS;\r |
219 | *OpPtr++ = DHCP4_DNS_SERVERS;\r |
220 | *OpPtr++ = DHCP4_HOST_NAME;\r |
221 | *OpPtr++ = DHCP4_BOOT_FILE_SIZE;\r |
222 | *OpPtr++ = DHCP4_MESSAGE_TYPE;\r |
223 | *OpPtr++ = DHCP4_DOMAIN_NAME;\r |
224 | *OpPtr++ = DHCP4_ROOT_PATH;\r |
225 | *OpPtr++ = DHCP4_EXTENSION_PATH;\r |
226 | *OpPtr++ = DHCP4_MAX_DATAGRAM_SIZE;\r |
227 | *OpPtr++ = DHCP4_DEFAULT_TTL;\r |
228 | *OpPtr++ = DHCP4_BROADCAST_ADDRESS;\r |
229 | *OpPtr++ = DHCP4_NIS_DOMAIN_NAME;\r |
230 | *OpPtr++ = DHCP4_NIS_SERVERS;\r |
231 | *OpPtr++ = DHCP4_NTP_SERVERS;\r |
232 | *OpPtr++ = DHCP4_VENDOR_SPECIFIC;\r |
233 | *OpPtr++ = DHCP4_REQUESTED_IP_ADDRESS;\r |
234 | *OpPtr++ = DHCP4_LEASE_TIME;\r |
235 | *OpPtr++ = DHCP4_SERVER_IDENTIFIER;\r |
236 | *OpPtr++ = DHCP4_RENEWAL_TIME;\r |
237 | *OpPtr++ = DHCP4_REBINDING_TIME;\r |
238 | *OpPtr++ = DHCP4_CLASS_IDENTIFIER;\r |
239 | *OpPtr++ = DHCP4_TFTP_SERVER_NAME;\r |
240 | *OpPtr++ = DHCP4_BOOTFILE;\r |
241 | *OpPtr++ = 128;\r |
242 | *OpPtr++ = 129;\r |
243 | *OpPtr++ = 130;\r |
244 | *OpPtr++ = 131;\r |
245 | *OpPtr++ = 132;\r |
246 | *OpPtr++ = 133;\r |
247 | *OpPtr++ = 134;\r |
248 | *OpPtr++ = 135;\r |
249 | *OpLen = (UINT8) ((OpPtr - OpLen) - 1);\r |
250 | \r |
251 | *OpPtr++ = DHCP4_END;\r |
252 | \r |
253 | This->Data->SetupCompleted = TRUE;\r |
254 | \r |
255 | return EFI_SUCCESS;\r |
256 | }\r |
257 | \r |
258 | /* eof - PxeDhcp4Setup.c */\r |