《BREW进阶与精通——3G移动增值业务的运营、定制与开发》连载之73---BREW 中的socket编程...

对基于UDP的网络通信而言，首先需要创建ISocket接口，

ISocket *mySocket;

mySocket = INETMGR_OpenSocket(pMe->pINetMgr, AEE_SOCK_STREAM);

if(!mySocket) {

DBGPRINTF(“Error value: %x”, INETMGR_GetLastError(pMe->pINetMgr));

}

然后，就可以发送数据包了

Void SendPacket(App* pMe){

retVal = ISOCKET_SendTo(pMe->pISocket, (byte*)"HelloWorld",

sizeof("HelloWorld"), 0, pMe->inAddr, HTONS(pMe->port));

switch(retVal) {

case AEE_NET_WOULDBLOCK:

ISOCKET_Writeable(pMe->pISocket, (PFNNOTIFY)SendPacket, pMe);

return;

// Some sort of network error

case AEE_NET_ERROR:

DBGPRINTF("Network Error");

break;

default:

if(retVal == sizeof(“HelloWorld”))

//Success

else

// Some other error

}

}

在接收数据之前，先要绑定客户端的端口。

static void SetUpNetwork(CVocApp* pMe) {

int retVal;

// Bind to the correct port and ip address

retVal = ISOCKET_Bind(pMe->pIRecvSocket, HTONL(AEE_BREW_LOOPBACK), HTONS(PORT));

// Check the return value of ISOCKET_Bind() and display necessary message

switch(retVal) {

// Socket not ready yet

case AEE_NET_WOULDBLOCK:

ISOCKET_Writeable(pMe->pIRecvSocket, (PFNNOTIFY)SetUpNetwork, pMe);

break;

// Succesfully connected

case AEE_NET_SUCCESS:

ISOCKET_Readable(pMe->pIRecvSocket, (PFNNOTIFY)ReadInData, pMe);

break;

// Something went wrong, print error to logger

default:

DBGPRINTF("retVal %d", ISOCKET_GetLastError(pMe->pIRecvSocket));

break;

}

}

然后，就可以通过UDP接收数据了，

static void ReadInData(App* pMe) {

int ret;

// When data is ready, receive data

ret = ISOCKET_RecvFrom(pMe->pIRecvSocket, (void*)&pMe->indata, sizeof(pMe->indata), ISOCKET_FLAG_SENDTO_WAKEUP|ISOCKET_FLAG_SENDTO_URGENT, NULL, NULL);

// Data integrity checks

if(ret < 0) {

DBGPRINTF("error %d", ISOCKET_GetLastError(pMe->pIRecvSocket));

}

// Have socket continue to listen

ISOCKET_Readable(pMe->pIRecvSocket, (PFNNOTIFY)ReadInData, pMe);

}

通信完毕，需要使用ISOCKET_Release()来释放接口对象。

对基于TCP的网络通信而言，同样，首先需要创建ISocket接口，

ISocket *mySocket;

mySocket = INETMGR_OpenSocket(pMe->pINetMgr, AEE_SOCK_STREAM);

if(!mySocket) {

DBGPRINTF(“Error value: %x”, INETMGR_GetLastError(pMe->pINetMgr));

}

然后，建立数据连接，并监测连接的网络状态，如果连接成功则发送数据

ISOCKET_Connect(pMe->pISocket,HTONL(myIP),HTONS(myPort),(PFNCONNECTCB)ConnectionMade, pMe);

static void ConnectionMade(myApp* pMe, int error) {

//Check error code

switch(error) {

case AEE_NET_ETIMEDOUT:

// Connection timed out

break;

case AEE_NET_SUCCESS:

// Send Some data

if(AEE_NET_WOULDBLOCK==ISOCKET_Write(pMe->pISocket,(byte*)"helloworld", sizeof("helloworld")) {

ISOCKET_Writeable(pMe->pISocket, (PFNNOTIFY) SendDataCB, pMe);

}

break;

default:

// Some other Network error

break;

}

}