* Acess2 IP Stack
* - Address Resolution Protocol
*/
+#define DEBUG 0
+#define VERSION ((0<<8)|10)
#include "ipstack.h"
+#include "link.h"
#include <modules.h>
#include <fs_devfs.h>
+#include <tpl_drv_common.h>
+#include <tpl_drv_network.h>
// === IMPORTS ===
- int ARP_Initialise();
+extern int ARP_Initialise();
+extern int IPv4_Initialise();
// === PROTOTYPES ===
int IPStack_Install(char **Arguments);
char *IPStack_ReadDir(tVFS_Node *Node, int Pos);
tVFS_Node *IPStack_FindDir(tVFS_Node *Node, char *Name);
+ int IPStack_IOCtl(tVFS_Node *Node, int ID, void *Data);
+ int IPStack_AddInterface(char *Device);
+tAdapter *IPStack_GetAdapter(char *Path);
// === GLOBALS ===
-MODULE_DEFINE(0, 0x000A, IPStack, IPStack_Install, NULL);
+MODULE_DEFINE(0, VERSION, IPStack, IPStack_Install, NULL, NULL);
tDevFS_Driver gIP_DriverInfo = {
NULL, "ip",
{
+ .Size = 0, // Number of interfaces
.NumACLs = 1,
.ACLs = &gVFS_ACL_EveryoneRX,
.Flags = VFS_FFLAG_DIRECTORY,
.ReadDir = IPStack_ReadDir,
- .FindDir = IPStack_FindDir
+ .FindDir = IPStack_FindDir,
+ .IOCtl = IPStack_IOCtl
}
};
- int giIP_NumInterfaces;
+tSpinlock glIP_Interfaces = 0;
tInterface *gIP_Interfaces = NULL;
+tInterface *gIP_Interfaces_Last = NULL;
+ int giIP_NextIfaceId = 1;
+tSpinlock glIP_Adapters = 0;
+tAdapter *gIP_Adapters = NULL;
// === CODE ===
/**
// Install Handlers
ARP_Initialise();
+ IPv4_Initialise();
- // Parse module arguments
- for( i = 0; Arguments[i]; i++ )
+ if(Arguments)
{
- //if(strcmp(Arguments[i], "Device") == '=') {
- //
- //}
+ // Parse module arguments
+ for( i = 0; Arguments[i]; i++ )
+ {
+ //if(strcmp(Arguments[i], "Device") == '=') {
+ //
+ //}
+ }
}
+ DevFS_AddDevice( &gIP_DriverInfo );
+
return 1;
}
char *IPStack_ReadDir(tVFS_Node *Node, int Pos)
{
tInterface *iface;
- char name[5] = "ip0\0\0";
+ char name[] = "ip0\0\0\0";
+ ENTER("pNode iPos", Node, Pos);
+
+ // Traverse the list
+ for( iface = gIP_Interfaces; iface && Pos--; iface = iface->Next ) ;
+
+ // Did we run off the end?
+ if(!iface) {
+ LEAVE('n');
+ return NULL;
+ }
// Create the name
+ Pos = iface->Node.ImplInt;
if(Pos < 10)
name[2] = '0' + Pos;
- else {
+ else if(Pos < 100) {
name[2] = '0' + Pos/10;
name[3] = '0' + Pos%10;
}
+ else {
+ name[2] = '0' + Pos/100;
+ name[3] = '0' + (Pos/10)%10;
+ name[4] = '0' + Pos%10;
+ }
- // Traverse the list
- for( iface = gIP_Interfaces; iface && Pos--; iface = iface->Next ) ;
-
- // Did we run off the end?
- if(!iface) return NULL;
-
+ LEAVE('s', name);
// Return the pre-generated name
return strdup(name);
}
*/
tVFS_Node *IPStack_FindDir(tVFS_Node *Node, char *Name)
{
+ int i, num;
+ tInterface *iface;
+
+ ENTER("pNode sName", Node, Name);
+
+ if(Name[0] != 'i' || Name[1] != 'p') {
+ LEAVE('n');
+ return NULL;
+ }
+
+ i = 2; num = 0;
+ while('0' <= Name[i] && Name[i] <= '9')
+ {
+ num *= 10;
+ num += Name[i] - '0';
+ i ++;
+ }
+ if(Name[i] != '\0') {
+ LEAVE('n');
+ return NULL;
+ }
+
+ for( iface = gIP_Interfaces; iface; iface = iface->Next )
+ {
+ if( iface->Node.ImplInt == num )
+ {
+ LEAVE('p', &iface->Node);
+ return &iface->Node;
+ }
+ }
+ LEAVE('p', NULL);
return NULL;
}
+
+static const char *casIOCtls_Root[] = { DRV_IOCTLNAMES, "add_interface", NULL };
+static const char *casIOCtls_Iface[] = {
+ DRV_IOCTLNAMES,
+ "getset_type",
+ "get_address", "set_address",
+ "getset_subnet",
+ "get_gateway", "set_gateway",
+ NULL
+ };
+/**
+ * \brief Handles IOCtls for the IPStack root/interfaces
+ */
+int IPStack_IOCtl(tVFS_Node *Node, int ID, void *Data)
+{
+ int tmp;
+ ENTER("pNode iID pData", Node, ID, Data);
+
+ switch(ID)
+ {
+ // --- Standard IOCtls (0-3) ---
+ case DRV_IOCTL_TYPE:
+ LEAVE('i', DRV_TYPE_MISC);
+ return DRV_TYPE_MISC;
+
+ case DRV_IOCTL_IDENT:
+ if( !CheckMem( Data, 4 ) ) LEAVE_RET('i', -1);
+ memcpy(Data, "IP\0\0", 4);
+ LEAVE('i', 1);
+ return 1;
+
+ case DRV_IOCTL_VERSION:
+ LEAVE('x', VERSION);
+ return VERSION;
+
+ case DRV_IOCTL_LOOKUP:
+ if( !CheckString( Data ) ) LEAVE_RET('i', -1);
+ LOG("Lookup '%s'", Data);
+ if( Node == &gIP_DriverInfo.RootNode )
+ tmp = LookupString( (char**)casIOCtls_Root, (char*)Data );
+ else
+ tmp = LookupString( (char**)casIOCtls_Iface, (char*)Data );
+ LEAVE('i', tmp);
+ return tmp;
+ }
+
+ if(Node == &gIP_DriverInfo.RootNode)
+ {
+ switch(ID)
+ {
+ /*
+ * add_interface
+ * - Adds a new IP interface and binds it to a device
+ */
+ case 4:
+ if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
+ if( !CheckString( Data ) ) LEAVE_RET('i', -1);
+ tmp = IPStack_AddInterface(Data);
+ LEAVE_RET('i', tmp);
+ }
+ LEAVE('i', 0);
+ return 0;
+ }
+ else
+ {
+ tInterface *iface = (tInterface*)Node->ImplPtr;
+ switch(ID)
+ {
+ /*
+ * getset_type
+ * - Get/Set the interface type
+ */
+ case 4:
+ // Set Type?
+ if( Data )
+ {
+ // Ok, it's set type
+ if( Threads_GetUID() != 0 ) {
+ LOG("Attempt by non-root to alter an interface (%i)", Threads_GetUID());
+ LEAVE('i', -1);
+ return -1;
+ }
+ if( !CheckMem( Data, sizeof(int) ) ) {
+ LOG("Invalid pointer %p", Data);
+ LEAVE('i', -1);
+ return -1;
+ }
+ switch( *(int*)Data )
+ {
+ case 0: // Disable
+ iface->Type = 0;
+ memset(&iface->IP6, 0, sizeof(tIPv6)); // Clear address
+ break;
+ case 4: // IPv4
+ iface->Type = 4;
+ memset(&iface->IP4, 0, sizeof(tIPv4));
+ break;
+ case 6: // IPv6
+ iface->Type = 6;
+ memset(&iface->IP6, 0, sizeof(tIPv6));
+ break;
+ default:
+ LEAVE('i', -1);
+ return -1;
+ }
+ }
+ LEAVE('i', iface->Type);
+ return iface->Type;
+
+ /*
+ * get_address
+ * - Get the interface's address
+ */
+ case 5:
+ switch(iface->Type)
+ {
+ case 0: LEAVE_RET('i', 1);
+ case 4:
+ if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
+ memcpy( Data, &iface->IP4.Address, sizeof(tIPv4) );
+ LEAVE_RET('i', 1);
+ case 6:
+ if( !CheckMem( Data, sizeof(tIPv6) ) ) LEAVE_RET('i', -1);
+ memcpy( Data, &iface->IP6.Address, sizeof(tIPv6) );
+ LEAVE_RET('i', 1);
+ }
+ LEAVE_RET('i', 0);
+
+ /*
+ * set_address
+ * - Get the interface's address
+ */
+ case 6:
+ if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
+ switch(iface->Type)
+ {
+ case 0: LEAVE_RET('i', 1);
+ case 4:
+ if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
+ iface->Type = 0; // One very hacky mutex/trash protector
+ memcpy( &iface->IP4.Address, Data, sizeof(tIPv4) );
+ iface->Type = 4;
+ LEAVE_RET('i', 1);
+ case 6:
+ if( !CheckMem( Data, sizeof(tIPv6) ) ) LEAVE_RET('i', -1);
+ iface->Type = 0;
+ memcpy( &iface->IP6.Address, Data, sizeof(tIPv6) );
+ iface->Type = 6;
+ LEAVE_RET('i', 1);
+ }
+ LEAVE_RET('i', 0);
+
+ /*
+ * getset_subnet
+ * - Get/Set the bits in the address subnet
+ */
+ case 7:
+ // Get?
+ if( Data == NULL )
+ {
+ switch( iface->Type )
+ {
+ case 4: LEAVE_RET('i', iface->IP4.SubnetBits);
+ case 6: LEAVE_RET('i', iface->IP6.SubnetBits);
+ default: LEAVE_RET('i', 0);
+ }
+ }
+
+ // Ok, set.
+ if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
+ if( !CheckMem(Data, sizeof(int)) ) LEAVE_RET('i', -1);
+
+ // Check and set the subnet bits
+ switch( iface->Type )
+ {
+ case 4:
+ if( *(int*)Data < 0 || *(int*)Data > 31 ) LEAVE_RET('i', -1);
+ iface->IP4.SubnetBits = *(int*)Data;
+ LEAVE_RET('i', iface->IP4.SubnetBits);
+ case 6:
+ if( *(int*)Data < 0 || *(int*)Data > 127 ) LEAVE_RET('i', -1);
+ iface->IP6.SubnetBits = *(int*)Data;
+ LEAVE_RET('i', iface->IP6.SubnetBits);
+ default:
+ break;
+ }
+
+ LEAVE('i', 0);
+ return 0;
+
+ /*
+ * get_gateway
+ * - Get the interface's IPv4 gateway
+ */
+ case 8:
+ switch(iface->Type)
+ {
+ case 0:
+ LEAVE_RET('i', 1);
+ case 4:
+ if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
+ memcpy( Data, &iface->IP4.Gateway, sizeof(tIPv4) );
+ LEAVE_RET('i', 1);
+ case 6:
+ LEAVE_RET('i', 1);
+ }
+ LEAVE('i', 0);
+ return 0;
+
+ /*
+ * set_gateway
+ * - Get the interface's IPv4 gateway
+ */
+ case 9:
+ if( Threads_GetUID() != 0 ) LEAVE_RET('i', -1);
+ switch(iface->Type)
+ {
+ case 0:
+ LEAVE_RET('i', 1);
+
+ case 4:
+ if( !CheckMem( Data, sizeof(tIPv4) ) ) LEAVE_RET('i', -1);
+ iface->Type = 0; // One very hacky mutex/trash protector
+ memcpy( &iface->IP4.Gateway, Data, sizeof(tIPv4) );
+ iface->Type = 4;
+ LEAVE_RET('i', 1);
+
+ case 6:
+ LEAVE_RET('i', 1);
+ }
+ LEAVE_RET('i', 0);
+ }
+ }
+
+ LEAVE('i', 0);
+ return 0;
+}
+
+// --- Internal ---
+/**
+ * \fn int IPStack_AddInterface(char *Device)
+ * \brief Adds an interface to the list
+ */
+int IPStack_AddInterface(char *Device)
+{
+ tInterface *iface;
+
+ ENTER("sDevice", Device);
+
+ iface = malloc(sizeof(tInterface));
+ if(!iface) {
+ LEAVE('i', -2);
+ return -2; // Return ERR_MYBAD
+ }
+
+ iface->Next = NULL;
+ iface->Type = 0; // Unset type
+
+ // Create Node
+ iface->Node.ImplPtr = iface;
+ iface->Node.ImplInt = giIP_NextIfaceId++;
+ iface->Node.Flags = VFS_FFLAG_DIRECTORY;
+ iface->Node.Size = 0;
+ iface->Node.NumACLs = 1;
+ iface->Node.ACLs = &gVFS_ACL_EveryoneRX;
+ iface->Node.ReadDir = NULL;
+ iface->Node.FindDir = NULL;
+ iface->Node.IOCtl = IPStack_IOCtl;
+
+ // Get adapter handle
+ iface->Adapter = IPStack_GetAdapter(Device);
+ if( !iface->Adapter ) {
+ free( iface );
+ LEAVE('i', -1);
+ return -1; // Return ERR_YOUFAIL
+ }
+
+ // Append to list
+ LOCK( &glIP_Interfaces );
+ if( gIP_Interfaces ) {
+ gIP_Interfaces_Last->Next = iface;
+ gIP_Interfaces_Last = iface;
+ }
+ else {
+ gIP_Interfaces = iface;
+ gIP_Interfaces_Last = iface;
+ }
+ RELEASE( &glIP_Interfaces );
+
+ gIP_DriverInfo.RootNode.Size ++;
+
+ // Success!
+ LEAVE('i', iface->Node.ImplInt);
+ return iface->Node.ImplInt;
+}
+
+/**
+ * \fn tAdapter *IPStack_GetAdapter(char *Path)
+ * \brief Gets/opens an adapter given the path
+ */
+tAdapter *IPStack_GetAdapter(char *Path)
+{
+ tAdapter *dev;
+ int tmp;
+
+ ENTER("sPath", Path);
+
+ LOCK( &glIP_Adapters );
+
+ // Check if this adapter is already open
+ for( dev = gIP_Adapters; dev; dev = dev->Next )
+ {
+ if( strcmp(dev->Device, Path) == 0 ) {
+ dev->NRef ++;
+ RELEASE( &glIP_Adapters );
+ LEAVE('p', dev);
+ return dev;
+ }
+ }
+
+ // Ok, so let's open it
+ dev = malloc( sizeof(tAdapter) + strlen(Path) + 1 );
+ if(!dev) {
+ RELEASE( &glIP_Adapters );
+ LEAVE('n');
+ return NULL;
+ }
+
+ // Fill Structure
+ strcpy( dev->Device, Path );
+ dev->NRef = 1;
+
+ // Open Device
+ dev->DeviceFD = VFS_Open( dev->Device, VFS_OPENFLAG_READ|VFS_OPENFLAG_WRITE );
+ if( dev->DeviceFD == -1 ) {
+ free( dev );
+ RELEASE( &glIP_Adapters );
+ LEAVE('n');
+ return NULL;
+ }
+
+ // Check that it is a network interface
+ tmp = VFS_IOCtl(dev->DeviceFD, 0, NULL);
+ LOG("Device type = %i", tmp);
+ if( tmp != DRV_TYPE_NETWORK ) {
+ Warning("IPStack_GetAdapter: '%s' is not a network interface", dev->Device);
+ VFS_Close( dev->DeviceFD );
+ free( dev );
+ RELEASE( &glIP_Adapters );
+ LEAVE('n');
+ return NULL;
+ }
+
+ // Get MAC Address
+ VFS_IOCtl(dev->DeviceFD, NET_IOCTL_GETMAC, &dev->MacAddr);
+
+ // Add to list
+ dev->Next = gIP_Adapters;
+ gIP_Adapters = dev;
+
+ RELEASE( &glIP_Adapters );
+
+ // Start watcher
+ Link_WatchDevice( dev );
+
+ LEAVE('p', dev);
+ return dev;
+}
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