Unix网络编程卷一:套接字联网API

perror("listen");

include

}

C programming language is commonly used for UNIX network programming due to its efficiency and lowlevel system access. Let's consider a basic example of TCP socket programming in C:

address.sin_addr.s_addr = INADDR_ANY;

exit(EXIT_FAILURE);

Berkeley Sockets API: Widely used for network programming in UNIXlike systems, providing a set of functions for creating and interacting with sockets.

perror("setsockopt");

}

define PORT 8080

Title: Exploring the Essentials of UNIX Network Programming

return 0;

if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {

int opt = 1;

int main() {

}

3. Resource Management: Properly manage system resources such as sockets and memory to prevent resource leaks and system instability.

if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {

send(new_socket, hello, strlen(hello), 0);

perror("accept");

// Creating socket file descriptor

include

This example demonstrates a simple TCP server that listens on port 8080, accepts incoming connections, receives messages from clients, and sends back a "Hello from server" message.

}

UNIX network programming is a domain that involves developing applications that communicate over a network using the UNIX operating system. This discipline encompasses a wide array of concepts, including socket programming, interprocess communication (IPC), and network protocols. Let's delve into the essentials of UNIX network programming and explore its significance in modern computing.

To ensure robust and secure network applications, adhere to the following best practices:

int addrlen = sizeof(address);

}

1. Error Handling: Always check for errors returned by system calls and handle them gracefully to prevent unexpected crashes.

// Forcefully attaching socket to the port 8080

exit(EXIT_FAILURE);

include

```

UNIX supports various network protocols and APIs for communication. Some of the prominent ones include:

if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {

4. Security Measures: Implement encryption, authentication, and access control mechanisms to safeguard data and restrict unauthorized access.

char *hello = "Hello from server";

exit(EXIT_FAILURE);

perror("bind failed");

address.sin_family = AF_INET;

address.sin_port = htons(PORT);

}

int server_fd, new_socket;

struct sockaddr_in address;

char buffer[1024] = {0};

exit(EXIT_FAILURE);

if (listen(server_fd, 3) < 0) {

// Forcefully attaching socket to the port 8080