Tools/NetTest/nic.c

   1 /*
   2  * Acess2 Networking Test Suite (NetTest)
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * nic.c
   6  * - Acess -> TAP Wrapper
   7  */
   8 #include <acess.h>
   9 #include <IPStack/include/adapters_api.h>
  10 #include <nettest.h>
  11
  12 // === CONSTANTS ===
  13 static const int MTU = 1520;
  14
  15 // === PROTOTYPES ===
  16 void    NativeNic_int_FreePacket(void *Ptr, size_t pkt_length, size_t Unused, const void *DataPtr);
  17 tIPStackBuffer  *NativeNic_WaitForPacket(void *Ptr);
  18  int    NativeNic_SendPacket(void *Ptr, tIPStackBuffer *Buffer);
  19
  20 // === GLOBALS ===
  21 tIPStack_AdapterType    gNativeNIC_AdapterType = {
  22         .Name = "NativeNIC",
  23         .Type = 0,
  24         .Flags = 0,
  25         .SendPacket = NativeNic_SendPacket,
  26         .WaitForPacket = NativeNic_WaitForPacket
  27         };
  28
  29 // === CODE ===
  30 int NativeNic_AddDev(char *DevDesc)
  31 {
  32         Uint8   macaddr[6];
  33         // Parse descriptor into mac address and path
  34         // 123456789ABC:tun:ifname
  35         // 123456789ABC:unix:/path
  36         // 123456789ABC:file:/path
  37         // 123456789ABC:tcp:host_desc
  38         char *colonpos = strchr(DevDesc, ':');
  39         if( !colonpos )
  40                 return -1;
  41         if( UnHex(macaddr, 6, DevDesc) != 6 )
  42                 return -1;
  43
  44         char *class = colonpos + 1;
  45         colonpos = strchr(class, ':');
  46         void *ptr;
  47         if( strncmp(class, "tun:", 4) == 0 ) {
  48                 ptr = NetTest_OpenTap(colonpos+1);
  49         }
  50         else if( strncmp(class, "unix:", 5) == 0 ) {
  51                 ptr = NetTest_OpenUnix(colonpos+1);
  52         }
  53         else {
  54                 Log_Warning("NIC", "Unknown opener '%.*s'", colonpos-class, class);
  55                 ptr = NULL;
  56         }
  57         if( !ptr )
  58                 return 1;
  59         IPStack_Adapter_Add(&gNativeNIC_AdapterType, ptr, macaddr);
  60
  61         return 0;
  62 }
  63
  64 void NativeNic_int_FreePacket(void *Ptr, size_t pkt_length, size_t Unused, const void *DataPtr)
  65 {
  66         free( (void*)DataPtr );
  67 }
  68
  69 tIPStackBuffer *NativeNic_WaitForPacket(void *Ptr)
  70 {
  71         char    *buf = malloc( MTU );
  72         size_t  len;
  73
  74         len = NetTest_ReadPacket(Ptr, MTU, buf);
  75
  76         tIPStackBuffer  *ret = IPStack_Buffer_CreateBuffer(1);
  77         IPStack_Buffer_AppendSubBuffer(ret, len, 0, buf, NativeNic_int_FreePacket, Ptr);
  78
  79         Debug_HexDump("NativeNic: RX", buf, len);
  80
  81         return ret;
  82 }
  83
  84 int NativeNic_SendPacket(void *Ptr, tIPStackBuffer *Buffer)
  85 {
  86         size_t  len = IPStack_Buffer_GetLength(Buffer);
  87
  88         // Check against MTU
  89         if( len > MTU )
  90                 return -1;
  91
  92         // Serialise into stack
  93         char    buf[len];
  94         IPStack_Buffer_GetData(Buffer, buf, len);
  95
  96         Debug_HexDump("NativeNic: TX", buf, len);
  97
  98         NetTest_WritePacket(Ptr, len, buf);
  99         return 0;
 100 }