socket通讯：C语言作为客户端Java作为服务端，java能收到请求报文，C接收不到响应报文。

[风流张郎]

我完全不懂C语言，从C那边拿到客户端的代码，代码如下：
C连接服务端说是在iConnect方法中

/* 连接到服务器 */
static int iConnect(int *pSock)
{
    struct sockaddr_in stSin;
    int iSock;
    int iRet;

    memset(&stSin, 0, sizeof(stSin));
    stSin.sin_family = AF_INET;
    stSin.sin_port = htons(stCommInfo.Port);
    if((iRet = inet_pton(AF_INET, stCommInfo.Ip, &stSin.sin_addr)) < 0)
    {
        log_error("转换地址失败:%s", strerror(errno));
        return -1;
    }
    else if(iRet == 0)
    {
        log_error("无效的地址:%s", stCommInfo.Ip);
        return -1;
    }

    iSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(iSock < 0) {
        log_error("创建连接套接字失败:%s", strerror(errno));
        return -1;
    }

    if(fcntl(iSock, F_SETFL, O_NONBLOCK) < 0)
    {
        log_error("设置非阻塞套接字失败:%s", strerror(errno));
        return -1;
    }

    if(connect(iSock, (struct sockaddr *)&stSin, sizeof(struct sockaddr)) == -1)
    {
        if(errno != EINPROGRESS)
        {
            log_error("创建连接套接字失败:%s", strerror(errno));
            return -1;
        }
    }

    *pSock = iSock;
    return 0;
}

static int iNRead(int iFd, char *sBuffer, int iLen)
{
    int i, iRc, iReadLen = 0;
    struct timeval tv = {0, 10000};

    for(i = 0; i < 3; i++)
    {
        if((iRc = read(iFd, sBuffer + iReadLen, iLen - iReadLen)) > 0)
        {
            iReadLen += iRc;
            if(iReadLen == iLen)
                return iReadLen;
        }
        else if(iRc == 0)
        {
            log_error("文件描述符[%d]被关闭", iFd);
            return 0;
        }
        else
        {
            if(errno == EAGAIN || errno == EWOULDBLOCK)
                select(0, NULL, NULL, NULL, &tv);
            else if(errno == EINTR)
                continue;
            else
            {
                log_error("读取数据失败：%s, 文件描述符[%d]",
                    strerror(errno), iFd);
                return -1;
            }
        }
    }

    log_error("数据不完整, 文件描述符[%d]", iFd);

    return -1;
}

java这边代码如下
线程

@Service("faceSSocketService")
public class FaceSSocketService {

	// socket server 线程
	private SocketThread socketThread;
	
	@Resource(name="faceWebServiceimpl")
	FaceWebService faceWebServiceimpl;
	
	public FaceWebService getFaceWebServiceImpl(){
		return this.faceWebServiceimpl;
	}
	

	public void close() {

		if (null != socketThread && !socketThread.isInterrupted()) {
			socketThread.closeSocketServer();
			socketThread.interrupt();
		}

	}


	public void start() {

		int serverPort = ObjectUtils.objToInt(
				PropsUtil.getProperty("ibis.socket.port"), -1);
		if (null == socketThread) {
			// 新建线程类
			socketThread = new SocketThread(null, this.getFaceWebServiceImpl(),
					ObjectUtils.objToInt(serverPort, 8082));
			// 启动线程
			socketThread.start();
		}

	}

}

socket服务

/**
 * 多线程处理socket接收的数据
 * socket在com.grgbanking.wxyh.listener.SocketThread.java中启动
 */
public class SocketServer extends Thread {
	
	private static final Logger logger = Logger.getLogger(SocketServer.class);

	private Socket socket;
	private FaceWebService faceWebService;

	public SocketServer(Socket socket, FaceWebService faceWebService) {
		this.socket = socket;
		this.faceWebService = faceWebService;
	}

	public void run() {
    	DataInputStream inputStream = null;
    	DataOutputStream outputStream=null;
		Connection conn=null;
		PreparedStatement ps=null;
		try {			
			outputStream = new DataOutputStream(socket.getOutputStream());
			inputStream = new DataInputStream(socket.getInputStream());	
//			PrintWriter outWriter=new PrintWriter(outputStream);
			String requestXmlStr = "";
			byte[] buf=new byte[4096];
			int length =0;
			while((length = inputStream.read(buf))!=-1){
				byte[] tmp=new byte[length];
				System.arraycopy(buf, 0, tmp, 0, length);
				requestXmlStr += new String(tmp,"GBK");
			}
			logger.info("接收到前置发过来的报文为：" + requestXmlStr);
			
			String responseXmlStr = SocketServerBusiness.doBusiness(faceWebService,requestXmlStr);
//			outWriter.println(responseXmlStr);
//			outWriter.flush();
			byte[] ss = responseXmlStr.getBytes("GBK");
			outputStream.write(ss);
			outputStream.flush();
//			logger.info("返回给前置的消息:" + responseLength+responseXmlStr);
		} catch (UnsupportedEncodingException e) {
			logger.error("UnsupportedEncodingException",e);
		} catch (IOException e) {
			logger.error("IOException",e);
		} catch (Exception e) {
			logger.error("Exception",e);
		}finally{
			try {
				outputStream.close();
				inputStream.close();
				socket.close();
				if(ps!=null){
					ps.close();
				}
				if(conn!=null){
					conn.close();
				}
			} catch (IOException e) {
				logger.error("IOException",e);
			} catch (SQLException e) {
				logger.error("IOException",e);
			}
		}
	}
}

doBusiness其中处理业务的就不用管了，总之现在返回responseXmlStr ，C客户端收不到数据，请各位搞人指点！

[renwotao2009]

用wireshark抓包看有没有回复包，调试下

[ljc930611]

同求，我这边也有这个问题，楼主怎么解决的