使用VxWorks操作系统实现简单的网络通信

VxWorks网络通信简单示例

以下是使用VxWorks操作系统实现简单的网络通信的示例代码：

```

const char serverGreeting[] = "Hello, client!";

void serverTask() { int status; int sock; int newsock; int sockAddrSize; struct sockaddr_in serverAddr; struct sockaddr_in clientAddr; char buffer[25];

/* create a TCP-based socket */
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == ERROR)
{
    printf("socket() failed\n");
    return;
}

/* bind the socket to a local address */
bzero((char *)&serverAddr, sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_len = sizeof(serverAddr);
serverAddr.sin_port = htons(SERVER_PORT_NUM);
serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
status = bind(sock, (struct sockaddr *)&serverAddr, sizeof(serverAddr));
if (status == ERROR)
{
    printf("bind() failed\n");
    close(sock);
    return;
}

/* set up the socket to listen for incoming connections */
status = listen(sock, 5);
if (status == ERROR)
{
    printf("listen() failed\n");
    close(sock);
    return;
}

printf("server waiting...\n");

/* wait for a client to connect */
sockAddrSize = sizeof(clientAddr);
newsock = accept(sock, (struct sockaddr *)&clientAddr, &sockAddrSize);
if (newsock == ERROR)
{
    printf("accept() failed\n");
    close(sock);
    return;
}

printf("server accepted connection from client %s\n",
       inet_ntoa(clientAddr.sin_addr));

/* send a greeting to the client */
status = send(newsock, serverGreeting, sizeof(serverGreeting), 0);
if (status == ERROR)
{
    printf("send() failed\n");
    close(sock);
    close(newsock);
    return;
}

/* receive a message from the client */
status = recv(newsock, buffer, sizeof(buffer), 0);
if (status == ERROR)
{
    printf("recv() failed\n");
    close(sock);
    close(newsock);
    return;
}

printf("server received message: %s\n", buffer);

/* clean up */
close(sock);
close(newsock);

}

void server() { taskSpawn("serverTask", SERVER_WORK_PRIORITY, 0, SERVER_STACK_SIZE, (FUNCPTR)serverTask, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); }

void client() { int status; int sock; struct sockaddr_in serverAddr; char buffer[25];

/* create a TCP-based socket */
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == ERROR)
{
    printf("socket() failed\n");
    return;
}

/* set up the server address */
bzero((char *)&serverAddr, sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_len = sizeof(serverAddr);
serverAddr.sin_port = htons(SERVER_PORT_NUM);
status = inet_aton("127.0.0.1", &serverAddr.sin_addr);
if (status == ERROR)
{
    printf("inet_aton() failed\n");
    close(sock);
    return;
}

/* connect to the server */
status = connect(sock, (struct sockaddr *)&serverAddr, sizeof(serverAddr));
if (status == ERROR)
{
    printf("connect() failed\n");
    close(sock);
    return;
}

/* receive a greeting from the server */
status = recv(sock, buffer, sizeof(buffer), 0);
if (status == ERROR)
{
    printf("recv() failed\n");
    close(sock);
    return;
}

printf("client received greeting: %s\n", buffer);

/* send a message to the server */
status = send(sock, "Hello, server!", sizeof("Hello, server!"), 0);
if (status == ERROR)
{
    printf("send() failed\n");
    close(sock);
    return;
}

/* clean up */
close(sock);

}

VxWorks简单socket编程实现

以上示例代码演示了VxWorks中简单的socket编程实现。在示例中，serverTask()函数使用socket()创建TCP套接字，使用bind()将套接字绑定到本地地址，使用listen()设置套接字以侦听传入连接，并使用accept()等待客户端连接。serverTask()函数还使用send()发送数据到客户端，使用recv()接收来自客户端的数据。client()函数使用socket()创建TCP套接字，使用connect()连接到服务器，使用recv()接收来自服务器的数据，使用send()向服务器发送数据。

示例代码

示例代码详见上方。

• socket()：创建套接字。
• bind()：将套接字绑定到本地地址。
• listen()：设置套接字以侦听传入连接。
• accept()：等待客户端连接。
• send()：发送数据到客户端或服务器。
• recv()：接收来自客户端或服务器的数据。

本文展示了如何在VxWorks操作系统中实现简单的网络通信。通过使用socket编程，可以创建TCP套接字、绑定到本地地址、侦听传入连接、等待客户端连接、发送数据到客户端或服务器、接收来自客户端或服务器的数据等操作。这对于需要在VxWorks中实现网络通信的开发人员非常有用。

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