3 * - Address Resolution Protocol
6 #define VERSION ((0<<8)|10)
11 #include <tpl_drv_common.h>
12 #include <tpl_drv_network.h>
18 int IPStack_Install(char **Arguments);
19 char *IPStack_ReadDir(tVFS_Node *Node, int Pos);
20 tVFS_Node *IPStack_FindDir(tVFS_Node *Node, char *Name);
21 int IPStack_IOCtl(tVFS_Node *Node, int ID, void *Data);
22 int IPStack_AddInterface(char *Device);
23 tAdapter *IPStack_GetAdapter(char *Path);
26 MODULE_DEFINE(0, VERSION, IPStack, IPStack_Install, NULL, NULL);
27 tDevFS_Driver gIP_DriverInfo = {
30 .Size = 0, // Number of interfaces
32 .ACLs = &gVFS_ACL_EveryoneRX,
33 .Flags = VFS_FFLAG_DIRECTORY,
34 .ReadDir = IPStack_ReadDir,
35 .FindDir = IPStack_FindDir,
36 .IOCtl = IPStack_IOCtl
39 tSpinlock glIP_Interfaces = 0;
40 tInterface *gIP_Interfaces = NULL;
41 tInterface *gIP_Interfaces_Last = NULL;
42 int giIP_NextIfaceId = 1;
43 tSpinlock glIP_Adapters = 0;
44 tAdapter *gIP_Adapters = NULL;
48 * \fn int IPStack_Install(char **Arguments)
49 * \brief Intialise the relevant parts of the stack and register with DevFS
51 int IPStack_Install(char **Arguments)
60 // Parse module arguments
61 for( i = 0; Arguments[i]; i++ )
63 //if(strcmp(Arguments[i], "Device") == '=') {
69 DevFS_AddDevice( &gIP_DriverInfo );
75 * \brief Read from the IP Stack's Device Directory
77 char *IPStack_ReadDir(tVFS_Node *Node, int Pos)
80 char name[] = "ip0\0\0\0";
81 ENTER("pNode iPos", Node, Pos);
84 for( iface = gIP_Interfaces; iface && Pos--; iface = iface->Next ) ;
86 // Did we run off the end?
93 Pos = iface->Node.ImplInt;
97 name[2] = '0' + Pos/10;
98 name[3] = '0' + Pos%10;
101 name[2] = '0' + Pos/100;
102 name[3] = '0' + (Pos/10)%10;
103 name[4] = '0' + Pos%10;
107 // Return the pre-generated name
112 * \brief Get the node of an interface
114 tVFS_Node *IPStack_FindDir(tVFS_Node *Node, char *Name)
119 ENTER("pNode sName", Node, Name);
121 if(Name[0] != 'i' || Name[1] != 'p') {
127 while('0' <= Name[i] && Name[i] <= '9')
130 num += Name[i] - '0';
133 if(Name[i] != '\0') {
138 for( iface = gIP_Interfaces; iface; iface = iface->Next )
140 if( iface->Node.ImplInt == num )
142 LEAVE('p', &iface->Node);
150 static const char *casIOCtls_Root[] = { DRV_IOCTLNAMES, "add_interface", NULL };
151 static const char *casIOCtls_Iface[] = {
154 "get_address", "set_address",
156 "get_gateway", "set_gateway",
160 * \brief Handles IOCtls for the IPStack root/interfaces
162 int IPStack_IOCtl(tVFS_Node *Node, int ID, void *Data)
165 ENTER("pNode iID pData", Node, ID, Data);
169 // --- Standard IOCtls (0-3) ---
171 LEAVE('i', DRV_TYPE_MISC);
172 return DRV_TYPE_MISC;
174 case DRV_IOCTL_IDENT:
175 if( !CheckMem( Data, 4 ) ) LEAVE_RET('i', -1);
176 memcpy(Data, "IP\0\0", 4);
180 case DRV_IOCTL_VERSION:
184 case DRV_IOCTL_LOOKUP:
185 if( !CheckString( Data ) ) LEAVE_RET('i', -1);
186 LOG("Lookup '%s'", Data);
187 if( Node == &gIP_DriverInfo.RootNode )
188 tmp = LookupString( (char**)casIOCtls_Root, (char*)Data );
190 tmp = LookupString( (char**)casIOCtls_Iface, (char*)Data );
195 if(Node == &gIP_DriverInfo.RootNode)
201 * - Adds a new IP interface and binds it to a device
204 if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
205 if( !CheckString( Data ) ) LEAVE_RET('i', -1);
206 tmp = IPStack_AddInterface(Data);
214 tInterface *iface = (tInterface*)Node->ImplPtr;
219 * - Get/Set the interface type
226 if( Threads_GetUID() != 0 ) {
227 LOG("Attempt by non-root to alter an interface (%i)", Threads_GetUID());
231 if( !CheckMem( Data, sizeof(int) ) ) {
232 LOG("Invalid pointer %p", Data);
236 switch( *(int*)Data )
240 memset(&iface->IP6, 0, sizeof(tIPv6)); // Clear address
244 memset(&iface->IP4, 0, sizeof(tIPv4));
248 memset(&iface->IP6, 0, sizeof(tIPv6));
255 LEAVE('i', iface->Type);
260 * - Get the interface's address
265 case 0: LEAVE_RET('i', 1);
267 if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
268 memcpy( Data, &iface->IP4.Address, sizeof(tIPv4) );
271 if( !CheckMem( Data, sizeof(tIPv6) ) ) LEAVE_RET('i', -1);
272 memcpy( Data, &iface->IP6.Address, sizeof(tIPv6) );
279 * - Get the interface's address
282 if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
285 case 0: LEAVE_RET('i', 1);
287 if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
288 iface->Type = 0; // One very hacky mutex/trash protector
289 memcpy( &iface->IP4.Address, Data, sizeof(tIPv4) );
293 if( !CheckMem( Data, sizeof(tIPv6) ) ) LEAVE_RET('i', -1);
295 memcpy( &iface->IP6.Address, Data, sizeof(tIPv6) );
303 * - Get/Set the bits in the address subnet
309 switch( iface->Type )
311 case 4: LEAVE_RET('i', iface->IP4.SubnetBits);
312 case 6: LEAVE_RET('i', iface->IP6.SubnetBits);
313 default: LEAVE_RET('i', 0);
318 if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
319 if( !CheckMem(Data, sizeof(int)) ) LEAVE_RET('i', -1);
321 // Check and set the subnet bits
322 switch( iface->Type )
325 if( *(int*)Data < 0 || *(int*)Data > 31 ) LEAVE_RET('i', -1);
326 iface->IP4.SubnetBits = *(int*)Data;
327 LEAVE_RET('i', iface->IP4.SubnetBits);
329 if( *(int*)Data < 0 || *(int*)Data > 127 ) LEAVE_RET('i', -1);
330 iface->IP6.SubnetBits = *(int*)Data;
331 LEAVE_RET('i', iface->IP6.SubnetBits);
341 * - Get the interface's IPv4 gateway
349 if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
350 memcpy( Data, &iface->IP4.Gateway, sizeof(tIPv4) );
360 * - Get the interface's IPv4 gateway
363 if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
370 if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
371 iface->Type = 0; // One very hacky mutex/trash protector
372 memcpy( &iface->IP4.Gateway, Data, sizeof(tIPv4) );
389 * \fn int IPStack_AddInterface(char *Device)
390 * \brief Adds an interface to the list
392 int IPStack_AddInterface(char *Device)
396 ENTER("sDevice", Device);
398 iface = malloc(sizeof(tInterface));
401 return -2; // Return ERR_MYBAD
405 iface->Type = 0; // Unset type
408 iface->Node.ImplPtr = iface;
409 iface->Node.ImplInt = giIP_NextIfaceId++;
410 iface->Node.Flags = VFS_FFLAG_DIRECTORY;
411 iface->Node.Size = 0;
412 iface->Node.NumACLs = 1;
413 iface->Node.ACLs = &gVFS_ACL_EveryoneRX;
414 iface->Node.ReadDir = NULL;
415 iface->Node.FindDir = NULL;
416 iface->Node.IOCtl = IPStack_IOCtl;
418 // Get adapter handle
419 iface->Adapter = IPStack_GetAdapter(Device);
420 if( !iface->Adapter ) {
423 return -1; // Return ERR_YOUFAIL
427 LOCK( &glIP_Interfaces );
428 if( gIP_Interfaces ) {
429 gIP_Interfaces_Last->Next = iface;
430 gIP_Interfaces_Last = iface;
433 gIP_Interfaces = iface;
434 gIP_Interfaces_Last = iface;
436 RELEASE( &glIP_Interfaces );
438 gIP_DriverInfo.RootNode.Size ++;
441 LEAVE('i', iface->Node.ImplInt);
442 return iface->Node.ImplInt;
446 * \fn tAdapter *IPStack_GetAdapter(char *Path)
447 * \brief Gets/opens an adapter given the path
449 tAdapter *IPStack_GetAdapter(char *Path)
454 ENTER("sPath", Path);
456 LOCK( &glIP_Adapters );
458 // Check if this adapter is already open
459 for( dev = gIP_Adapters; dev; dev = dev->Next )
461 if( strcmp(dev->Device, Path) == 0 ) {
463 RELEASE( &glIP_Adapters );
469 // Ok, so let's open it
470 dev = malloc( sizeof(tAdapter) + strlen(Path) + 1 );
472 RELEASE( &glIP_Adapters );
478 strcpy( dev->Device, Path );
482 dev->DeviceFD = VFS_Open( dev->Device, VFS_OPENFLAG_READ|VFS_OPENFLAG_WRITE );
483 if( dev->DeviceFD == -1 ) {
485 RELEASE( &glIP_Adapters );
490 // Check that it is a network interface
491 tmp = VFS_IOCtl(dev->DeviceFD, 0, NULL);
492 LOG("Device type = %i", tmp);
493 if( tmp != DRV_TYPE_NETWORK ) {
494 Warning("IPStack_GetAdapter: '%s' is not a network interface", dev->Device);
495 VFS_Close( dev->DeviceFD );
497 RELEASE( &glIP_Adapters );
503 VFS_IOCtl(dev->DeviceFD, NET_IOCTL_GETMAC, &dev->MacAddr);
506 dev->Next = gIP_Adapters;
509 RELEASE( &glIP_Adapters );
512 Link_WatchDevice( dev );