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This commit is contained in:
Tony Kuker 2020-12-27 20:13:21 -06:00
parent 5ba4f0183c
commit 4cd07f63ee
2 changed files with 32 additions and 32 deletions
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42
src/raspberrypi/devices/ctapdriver.cpp
View File

@ -18,19 +18,19 @@
//---------------------------------------------------------------------------
//
// コンストラクタ
// Constructor
//
//---------------------------------------------------------------------------
CTapDriver::CTapDriver()
{
// 初期化
// Initialization
m_hTAP = -1;
memset(&m_MacAddr, 0, sizeof(m_MacAddr));
}
//---------------------------------------------------------------------------
//
// 初期化
// Initialization
//
//---------------------------------------------------------------------------
#ifdef __linux__
@ -42,7 +42,7 @@ BOOL FASTCALL CTapDriver::Init()
ASSERT(this);
// TAPデバイス初期化
// TAP device initilization
if ((m_hTAP = open("/dev/net/tun", O_RDWR)) < 0) {
printf("Error: can't open tun\n");
return FALSE;
@ -58,7 +58,7 @@ BOOL FASTCALL CTapDriver::Init()
return FALSE;
}
// MACアドレス取得
// Get MAC address
ifr.ifr_addr.sa_family = AF_INET;
if ((ret = ioctl(m_hTAP, SIOCGIFHWADDR, &ifr)) < 0) {
printf("Error: can't ioctl SIOCGIFHWADDR\n");
@ -66,7 +66,7 @@ BOOL FASTCALL CTapDriver::Init()
return FALSE;
}
// MACアドレス保存
// Save MAC address
memcpy(m_MacAddr, ifr.ifr_hwaddr.sa_data, sizeof(m_MacAddr));
return TRUE;
}
@ -80,20 +80,20 @@ BOOL FASTCALL CTapDriver::Init()
ASSERT(this);
// TAPデバイス初期化
// TAP Device Initialization
if ((m_hTAP = open("/dev/tap", O_RDWR)) < 0) {
printf("Error: can't open tap\n");
return FALSE;
}
// デバイス名取得
// Get device name
if (ioctl(m_hTAP, TAPGIFNAME, (void *)&ifr) < 0) {
printf("Error: can't ioctl TAPGIFNAME\n");
close(m_hTAP);
return FALSE;
}
// MACアドレス取得
// Get MAC address
if (getifaddrs(&ifa) == -1) {
printf("Error: can't getifaddrs\n");
close(m_hTAP);
@ -109,7 +109,7 @@ BOOL FASTCALL CTapDriver::Init()
return FALSE;
}
// MACアドレス保存
// Save MAC address
memcpy(m_MacAddr, LLADDR((struct sockaddr_dl *)a->ifa_addr),
sizeof(m_MacAddr));
freeifaddrs(ifa);
@ -122,7 +122,7 @@ BOOL FASTCALL CTapDriver::Init()
//---------------------------------------------------------------------------
//
// クリーンアップ
// Cleanup
//
//---------------------------------------------------------------------------
void FASTCALL CTapDriver::Cleanup()
@ -138,7 +138,7 @@ void FASTCALL CTapDriver::Cleanup()
//---------------------------------------------------------------------------
//
// MACアドレス取得
// MGet MAC Address
//
//---------------------------------------------------------------------------
void FASTCALL CTapDriver::GetMacAddr(BYTE *mac)
@ -151,7 +151,7 @@ void FASTCALL CTapDriver::GetMacAddr(BYTE *mac)
//---------------------------------------------------------------------------
//
// 受信
// Receive
//
//---------------------------------------------------------------------------
int FASTCALL CTapDriver::Rx(BYTE *buf)
@ -162,7 +162,7 @@ int FASTCALL CTapDriver::Rx(BYTE *buf)
ASSERT(this);
ASSERT(m_hTAP != -1);
// 受信可能なデータがあるか調べる
// Check if there is data that can be received
fds.fd = m_hTAP;
fds.events = POLLIN | POLLERR;
fds.revents = 0;
@ -171,32 +171,32 @@ int FASTCALL CTapDriver::Rx(BYTE *buf)
return 0;
}
// 受信
// Receive
dwReceived = read(m_hTAP, buf, ETH_FRAME_LEN);
if (dwReceived == (DWORD)-1) {
return 0;
}
// 受信が有効であれば
// If reception is enabled
if (dwReceived > 0) {
// FCSを除く最小フレームサイズ(60バイト)にパディング
// Pad to the maximum frame size (60 bytes) excluding FCS
if (dwReceived < 60) {
memset(buf + dwReceived, 0, 60 - dwReceived);
dwReceived = 60;
}
// ダミーのFCSを付加する
// Add a dummy FCS
memset(buf + dwReceived, 0, 4);
dwReceived += 4;
}
// バイト数を返却
// Return the number of bytes
return dwReceived;
}
//---------------------------------------------------------------------------
//
// 送信
// Send
//
//---------------------------------------------------------------------------
int FASTCALL CTapDriver::Tx(BYTE *buf, int len)
@ -204,6 +204,6 @@ int FASTCALL CTapDriver::Tx(BYTE *buf, int len)
ASSERT(this);
ASSERT(m_hTAP != -1);
// 送信開始
// Start sending
return write(m_hTAP, buf, len);
}

22
src/raspberrypi/devices/ctapdriver.h
View File

@ -21,33 +21,33 @@
//===========================================================================
//
// Tapドライバ
// Linux Tap Driver
//
//===========================================================================
class CTapDriver
{
public:
// 基本ファンクション
// Basic Functionality
CTapDriver();
// コンストラクタ
// Constructor
BOOL FASTCALL Init();
// 初期化
// Initilization
void FASTCALL Cleanup();
// クリーンアップ
// Cleanup
void FASTCALL GetMacAddr(BYTE *mac);
// MACアドレス取得
// Get Mac Address
int FASTCALL Rx(BYTE *buf);
// 受信
// Receive
int FASTCALL Tx(BYTE *buf, int len);
// 送信
// Send
private:
BYTE m_MacAddr[6];
// MACアドレス
// MAC Address
BOOL m_bTxValid;
// 送信有効フラグ
// Send Valid Flag
int m_hTAP;
// ディスクプリタ
// File handle
};
#endif // ctapdriver_h