70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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int echo() {
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int listen_socket, client_socket;
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struct sockaddr_in listen_addr, client_addr;
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socklen_t client_addr_len;
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char buffer[1024];
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int bytes_received;
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// Create a socket
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listen_socket = socket(AF_INET, SOCK_STREAM, 0);
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if (listen_socket < 0) {
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perror("socket");
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exit(1);
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}
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// Bind the socket to port 5001
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listen_addr.sin_family = AF_INET;
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listen_addr.sin_port = htons(5001);
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listen_addr.sin_addr.s_addr = INADDR_ANY;
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if (bind(listen_socket, (struct sockaddr *)&listen_addr, sizeof(listen_addr)) < 0) {
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perror("bind");
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exit(1);
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}
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// Listen for connections
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listen(listen_socket, 5);
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// Accept a connection
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client_addr_len = sizeof(client_addr);
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client_socket = accept(listen_socket, (struct sockaddr *)&client_addr, &client_addr_len);
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if (client_socket < 0) {
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perror("accept");
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exit(1);
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}
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// Echo the data back to the client
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while (1) {
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bytes_received = recv(client_socket, buffer, sizeof(buffer), 0);
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if (bytes_received < 0) {
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perror("recv");
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exit(1);
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}
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if (bytes_received == 0) {
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// The client has closed the connection
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break;
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}
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send(client_socket, buffer, bytes_received, 0);
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}
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// Close the sockets
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close(listen_socket);
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close(client_socket);
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return 0;
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}
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int main() {
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while (1) {
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echo();
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}
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return 0;
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}
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