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772db4bb | 1 | /** @file\r |
2 | \r | |
3e8c18da | 3 | Copyright (c) 2005 - 2006, Intel Corporation.<BR>\r |
772db4bb | 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 | |
772db4bb | 12 | **/\r |
13 | \r | |
14 | #include "Ip4Impl.h"\r | |
15 | \r | |
16 | \r | |
17 | /**\r | |
5405e9a6 | 18 | Return the cast type (Unicast/Boradcast) specific to an\r |
772db4bb | 19 | interface. All the addresses are host byte ordered.\r |
20 | \r | |
3e8c18da | 21 | @param[in] IpAddr The IP address to classify in host byte order\r |
22 | @param[in] IpIf The interface that IpAddr received from\r | |
772db4bb | 23 | \r |
24 | @return The cast type of this IP address specific to the interface.\r | |
25 | @retval IP4_LOCAL_HOST The IpAddr equals to the interface's address\r | |
26 | @retval IP4_SUBNET_BROADCAST The IpAddr is a directed subnet boradcast to the\r | |
27 | interface\r | |
28 | @retval IP4_NET_BROADCAST The IpAddr is a network broadcast to the interface\r | |
5405e9a6 | 29 | @retval 0 Otherwise.\r |
772db4bb | 30 | \r |
31 | **/\r | |
32 | INTN\r | |
33 | Ip4GetNetCast (\r | |
34 | IN IP4_ADDR IpAddr,\r | |
35 | IN IP4_INTERFACE *IpIf\r | |
36 | )\r | |
37 | {\r | |
38 | if (IpAddr == IpIf->Ip) {\r | |
39 | return IP4_LOCAL_HOST;\r | |
40 | \r | |
41 | } else if (IpAddr == IpIf->SubnetBrdcast) {\r | |
42 | return IP4_SUBNET_BROADCAST;\r | |
43 | \r | |
44 | } else if (IpAddr == IpIf->NetBrdcast) {\r | |
45 | return IP4_NET_BROADCAST;\r | |
46 | \r | |
47 | }\r | |
48 | \r | |
49 | return 0;\r | |
50 | }\r | |
51 | \r | |
52 | \r | |
53 | /**\r | |
54 | Find the cast type of the packet related to the local host.\r | |
55 | This isn't the same as link layer cast type. For example, DHCP\r | |
56 | server may send local broadcast to the local unicast MAC.\r | |
57 | \r | |
3e8c18da | 58 | @param[in] IpSb The IP4 service binding instance that received the\r |
59 | packet\r | |
60 | @param[in] Dst The destination address in the packet (host byte\r | |
61 | order)\r | |
62 | @param[in] Src The source address in the packet (host byte order)\r | |
772db4bb | 63 | \r |
64 | @return The cast type for the Dst, it will return on the first non-promiscuous\r | |
5405e9a6 | 65 | cast type to a configured interface. If the packet doesn't match any of\r |
66 | the interface, multicast address and local broadcast address are checked.\r | |
772db4bb | 67 | \r |
68 | **/\r | |
69 | INTN\r | |
70 | Ip4GetHostCast (\r | |
71 | IN IP4_SERVICE *IpSb,\r | |
72 | IN IP4_ADDR Dst,\r | |
73 | IN IP4_ADDR Src\r | |
74 | )\r | |
75 | {\r | |
e48e37fc | 76 | LIST_ENTRY *Entry;\r |
772db4bb | 77 | IP4_INTERFACE *IpIf;\r |
78 | INTN Type;\r | |
79 | INTN Class;\r | |
80 | \r | |
81 | Type = 0;\r | |
82 | \r | |
83 | if (IpSb->MnpConfigData.EnablePromiscuousReceive) {\r | |
84 | Type = IP4_PROMISCUOUS;\r | |
85 | }\r | |
86 | \r | |
87 | //\r | |
88 | // Go through the interface list of the IP service, most likely.\r | |
89 | //\r | |
90 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
91 | IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);\r | |
92 | \r | |
93 | //\r | |
94 | // Skip the unconfigured interface and invalid source address:\r | |
95 | // source address can't be broadcast.\r | |
96 | //\r | |
97 | if (!IpIf->Configured || IP4_IS_BROADCAST (Ip4GetNetCast (Src, IpIf))) {\r | |
98 | continue;\r | |
99 | }\r | |
100 | \r | |
101 | if ((Class = Ip4GetNetCast (Dst, IpIf)) > Type) {\r | |
102 | return Class;\r | |
103 | }\r | |
104 | }\r | |
105 | \r | |
106 | //\r | |
107 | // If it is local broadcast address. The source address must\r | |
108 | // be a unicast address on one of the direct connected network.\r | |
109 | // If it is a multicast address, accept it only if we are in\r | |
110 | // the group.\r | |
111 | //\r | |
112 | if (Dst == IP4_ALLONE_ADDRESS) {\r | |
113 | IpIf = Ip4FindNet (IpSb, Src);\r | |
114 | \r | |
5405e9a6 | 115 | if (IpIf != NULL && !IP4_IS_BROADCAST (Ip4GetNetCast (Src, IpIf))) {\r |
772db4bb | 116 | return IP4_LOCAL_BROADCAST;\r |
117 | }\r | |
118 | \r | |
5405e9a6 | 119 | } else if (IP4_IS_MULTICAST (Dst) && Ip4FindGroup (&IpSb->IgmpCtrl, Dst) != NULL) {\r |
772db4bb | 120 | return IP4_MULTICAST;\r |
121 | }\r | |
122 | \r | |
123 | return Type;\r | |
124 | }\r | |
125 | \r | |
126 | \r | |
127 | /**\r | |
5405e9a6 | 128 | Find an interface whose configured IP address is Ip.\r |
772db4bb | 129 | \r |
3e8c18da | 130 | @param[in] IpSb The IP4 service binding instance\r |
131 | @param[in] Ip The Ip address (host byte order) to find\r | |
772db4bb | 132 | \r |
133 | @return The IP4_INTERFACE point if found, otherwise NULL\r | |
134 | \r | |
135 | **/\r | |
136 | IP4_INTERFACE *\r | |
137 | Ip4FindInterface (\r | |
138 | IN IP4_SERVICE *IpSb,\r | |
139 | IN IP4_ADDR Ip\r | |
140 | )\r | |
141 | {\r | |
e48e37fc | 142 | LIST_ENTRY *Entry;\r |
772db4bb | 143 | IP4_INTERFACE *IpIf;\r |
144 | \r | |
145 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
146 | IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);\r | |
147 | \r | |
148 | if (IpIf->Configured && (IpIf->Ip == Ip)) {\r | |
149 | return IpIf;\r | |
150 | }\r | |
151 | }\r | |
152 | \r | |
153 | return NULL;\r | |
154 | }\r | |
155 | \r | |
156 | \r | |
157 | /**\r | |
158 | Find an interface that Ip is on that connected network.\r | |
159 | \r | |
3e8c18da | 160 | @param[in] IpSb The IP4 service binding instance\r |
161 | @param[in] Ip The Ip address (host byte order) to find\r | |
772db4bb | 162 | \r |
163 | @return The IP4_INTERFACE point if found, otherwise NULL\r | |
164 | \r | |
165 | **/\r | |
166 | IP4_INTERFACE *\r | |
167 | Ip4FindNet (\r | |
168 | IN IP4_SERVICE *IpSb,\r | |
169 | IN IP4_ADDR Ip\r | |
170 | )\r | |
171 | {\r | |
e48e37fc | 172 | LIST_ENTRY *Entry;\r |
772db4bb | 173 | IP4_INTERFACE *IpIf;\r |
174 | \r | |
175 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
176 | IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);\r | |
177 | \r | |
178 | if (IpIf->Configured && IP4_NET_EQUAL (Ip, IpIf->Ip, IpIf->SubnetMask)) {\r | |
179 | return IpIf;\r | |
180 | }\r | |
181 | }\r | |
182 | \r | |
183 | return NULL;\r | |
184 | }\r | |
185 | \r | |
186 | \r | |
187 | /**\r | |
188 | Find an interface of the service with the same Ip/Netmask pair.\r | |
189 | \r | |
3e8c18da | 190 | @param[in] IpSb Ip4 service binding instance\r |
191 | @param[in] Ip The Ip adress to find (host byte order)\r | |
192 | @param[in] Netmask The network to find (host byte order)\r | |
772db4bb | 193 | \r |
194 | @return The IP4_INTERFACE point if found, otherwise NULL\r | |
195 | \r | |
196 | **/\r | |
197 | IP4_INTERFACE *\r | |
198 | Ip4FindStationAddress (\r | |
199 | IN IP4_SERVICE *IpSb,\r | |
200 | IN IP4_ADDR Ip,\r | |
201 | IN IP4_ADDR Netmask\r | |
202 | )\r | |
203 | {\r | |
e48e37fc | 204 | LIST_ENTRY *Entry;\r |
772db4bb | 205 | IP4_INTERFACE *IpIf;\r |
206 | \r | |
207 | NET_LIST_FOR_EACH (Entry, &IpSb->Interfaces) {\r | |
208 | IpIf = NET_LIST_USER_STRUCT (Entry, IP4_INTERFACE, Link);\r | |
209 | \r | |
210 | if (IpIf->Configured && (IpIf->Ip == Ip) && (IpIf->SubnetMask == Netmask)) {\r | |
211 | return IpIf;\r | |
212 | }\r | |
213 | }\r | |
214 | \r | |
215 | return NULL;\r | |
216 | }\r | |
217 | \r | |
218 | \r | |
219 | /**\r | |
220 | Get the MAC address for a multicast IP address. Call\r | |
221 | Mnp's McastIpToMac to find the MAC address in stead of\r | |
222 | hard code the NIC to be Ethernet.\r | |
223 | \r | |
3e8c18da | 224 | @param[in] Mnp The Mnp instance to get the MAC address.\r |
225 | @param[in] Multicast The multicast IP address to translate.\r | |
226 | @param[out] Mac The buffer to hold the translated address.\r | |
772db4bb | 227 | \r |
5405e9a6 | 228 | @retval EFI_SUCCESS if the multicast IP is successfully translated to a\r |
229 | multicast MAC address.\r | |
230 | @retval other Otherwise some error.\r | |
772db4bb | 231 | \r |
232 | **/\r | |
233 | EFI_STATUS\r | |
234 | Ip4GetMulticastMac (\r | |
235 | IN EFI_MANAGED_NETWORK_PROTOCOL *Mnp,\r | |
236 | IN IP4_ADDR Multicast,\r | |
237 | OUT EFI_MAC_ADDRESS *Mac\r | |
238 | )\r | |
239 | {\r | |
240 | EFI_IP_ADDRESS EfiIp;\r | |
241 | \r | |
242 | EFI_IP4 (EfiIp.v4) = HTONL (Multicast);\r | |
243 | return Mnp->McastIpToMac (Mnp, FALSE, &EfiIp, Mac);\r | |
244 | }\r | |
245 | \r | |
246 | \r | |
247 | /**\r | |
248 | Convert the multibyte field in IP header's byter order.\r | |
249 | In spite of its name, it can also be used to convert from\r | |
250 | host to network byte order.\r | |
251 | \r | |
3e8c18da | 252 | @param[in] Head The IP head to convert\r |
772db4bb | 253 | \r |
254 | @return Point to the converted IP head\r | |
255 | \r | |
256 | **/\r | |
257 | IP4_HEAD *\r | |
258 | Ip4NtohHead (\r | |
259 | IN IP4_HEAD *Head\r | |
260 | )\r | |
261 | {\r | |
262 | Head->TotalLen = NTOHS (Head->TotalLen);\r | |
263 | Head->Id = NTOHS (Head->Id);\r | |
264 | Head->Fragment = NTOHS (Head->Fragment);\r | |
265 | Head->Src = NTOHL (Head->Src);\r | |
266 | Head->Dst = NTOHL (Head->Dst);\r | |
267 | \r | |
268 | return Head;\r | |
269 | }\r | |
270 | \r | |
271 | \r | |
272 | /**\r | |
273 | Set the Ip4 variable data.\r | |
5405e9a6 | 274 | \r |
275 | Save the list of all of the IPv4 addresses and subnet masks that are currently\r | |
276 | being used to volatile variable storage.\r | |
772db4bb | 277 | \r |
3e8c18da | 278 | @param[in] IpSb Ip4 service binding instance\r |
772db4bb | 279 | \r |
5405e9a6 | 280 | @retval EFI_SUCCESS Successfully set variable.\r |
772db4bb | 281 | @retval EFI_OUT_OF_RESOURCES There are not enough resources to set the variable.\r |
282 | @retval other Set variable failed.\r | |
283 | \r | |
284 | **/\r | |
285 | EFI_STATUS\r | |
286 | Ip4SetVariableData (\r | |
287 | IN IP4_SERVICE *IpSb\r | |
288 | )\r | |
289 | {\r | |
290 | UINT32 NumConfiguredInstance;\r | |
e48e37fc | 291 | LIST_ENTRY *Entry;\r |
772db4bb | 292 | UINTN VariableDataSize;\r |
293 | EFI_IP4_VARIABLE_DATA *Ip4VariableData;\r | |
294 | EFI_IP4_ADDRESS_PAIR *Ip4AddressPair;\r | |
295 | IP4_PROTOCOL *IpInstance;\r | |
296 | CHAR16 *NewMacString;\r | |
297 | EFI_STATUS Status;\r | |
298 | \r | |
299 | NumConfiguredInstance = 0;\r | |
300 | \r | |
301 | //\r | |
302 | // Go through the children list to count the configured children.\r | |
303 | //\r | |
304 | NET_LIST_FOR_EACH (Entry, &IpSb->Children) {\r | |
305 | IpInstance = NET_LIST_USER_STRUCT_S (Entry, IP4_PROTOCOL, Link, IP4_PROTOCOL_SIGNATURE);\r | |
306 | \r | |
307 | if (IpInstance->State == IP4_STATE_CONFIGED) {\r | |
308 | NumConfiguredInstance++;\r | |
309 | }\r | |
310 | }\r | |
311 | \r | |
312 | //\r | |
313 | // Calculate the size of the Ip4VariableData. As there may be no IP child,\r | |
314 | // we should add extra buffer for the address paris only if the number of configured\r | |
315 | // children is more than 1.\r | |
316 | //\r | |
317 | VariableDataSize = sizeof (EFI_IP4_VARIABLE_DATA);\r | |
318 | \r | |
319 | if (NumConfiguredInstance > 1) {\r | |
320 | VariableDataSize += sizeof (EFI_IP4_ADDRESS_PAIR) * (NumConfiguredInstance - 1);\r | |
321 | }\r | |
322 | \r | |
e48e37fc | 323 | Ip4VariableData = AllocatePool (VariableDataSize);\r |
772db4bb | 324 | if (Ip4VariableData == NULL) {\r |
325 | return EFI_OUT_OF_RESOURCES;\r | |
326 | }\r | |
327 | \r | |
328 | Ip4VariableData->DriverHandle = IpSb->Image;\r | |
329 | Ip4VariableData->AddressCount = NumConfiguredInstance;\r | |
330 | \r | |
331 | Ip4AddressPair = &Ip4VariableData->AddressPairs[0];\r | |
332 | \r | |
333 | //\r | |
334 | // Go through the children list to fill the configured children's address pairs.\r | |
335 | //\r | |
336 | NET_LIST_FOR_EACH (Entry, &IpSb->Children) {\r | |
337 | IpInstance = NET_LIST_USER_STRUCT_S (Entry, IP4_PROTOCOL, Link, IP4_PROTOCOL_SIGNATURE);\r | |
338 | \r | |
339 | if (IpInstance->State == IP4_STATE_CONFIGED) {\r | |
340 | Ip4AddressPair->InstanceHandle = IpInstance->Handle;\r | |
341 | EFI_IP4 (Ip4AddressPair->Ip4Address) = NTOHL (IpInstance->Interface->Ip);\r | |
342 | EFI_IP4 (Ip4AddressPair->SubnetMask) = NTOHL (IpInstance->Interface->SubnetMask);\r | |
343 | \r | |
344 | Ip4AddressPair++;\r | |
345 | }\r | |
346 | }\r | |
347 | \r | |
348 | //\r | |
349 | // Get the mac string.\r | |
350 | //\r | |
351 | Status = NetLibGetMacString (IpSb->Controller, IpSb->Image, &NewMacString);\r | |
352 | if (EFI_ERROR (Status)) {\r | |
353 | goto ON_ERROR;\r | |
354 | }\r | |
355 | \r | |
356 | if (IpSb->MacString != NULL) {\r | |
357 | //\r | |
358 | // The variable is set already, we're going to update it.\r | |
359 | //\r | |
360 | if (StrCmp (IpSb->MacString, NewMacString) != 0) {\r | |
361 | //\r | |
362 | // The mac address is changed, delete the previous variable first.\r | |
363 | //\r | |
364 | gRT->SetVariable (\r | |
365 | IpSb->MacString,\r | |
366 | &gEfiIp4ServiceBindingProtocolGuid,\r | |
367 | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r | |
368 | 0,\r | |
369 | NULL\r | |
370 | );\r | |
371 | }\r | |
372 | \r | |
e48e37fc | 373 | gBS->FreePool (IpSb->MacString);\r |
772db4bb | 374 | }\r |
375 | \r | |
376 | IpSb->MacString = NewMacString;\r | |
377 | \r | |
378 | Status = gRT->SetVariable (\r | |
379 | IpSb->MacString,\r | |
380 | &gEfiIp4ServiceBindingProtocolGuid,\r | |
381 | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r | |
382 | VariableDataSize,\r | |
383 | (VOID *) Ip4VariableData\r | |
384 | );\r | |
385 | \r | |
386 | ON_ERROR:\r | |
387 | \r | |
e48e37fc | 388 | gBS->FreePool (Ip4VariableData);\r |
772db4bb | 389 | \r |
390 | return Status;\r | |
391 | }\r | |
392 | \r | |
393 | \r | |
394 | /**\r | |
395 | Clear the variable and free the resource.\r | |
396 | \r | |
3e8c18da | 397 | @param[in] IpSb Ip4 service binding instance\r |
772db4bb | 398 | \r |
399 | **/\r | |
400 | VOID\r | |
401 | Ip4ClearVariableData (\r | |
402 | IN IP4_SERVICE *IpSb\r | |
403 | )\r | |
404 | {\r | |
405 | ASSERT (IpSb->MacString != NULL);\r | |
406 | \r | |
407 | gRT->SetVariable (\r | |
408 | IpSb->MacString,\r | |
409 | &gEfiIp4ServiceBindingProtocolGuid,\r | |
410 | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r | |
411 | 0,\r | |
412 | NULL\r | |
413 | );\r | |
414 | \r | |
e48e37fc | 415 | gBS->FreePool (IpSb->MacString);\r |
772db4bb | 416 | IpSb->MacString = NULL;\r |
417 | }\r |