asterinas/test/apps/network/unix_client.c

// SPDX-License-Identifier: MPL-2.0

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

#define SOCKET_NAME "/tmp/test.sock"
#define BUFFER_SIZE 128

int main()
{
	int client_fd;
	struct sockaddr_un server_addr, peer_addr;
	char buf[BUFFER_SIZE];

	// Create Client Socket
	client_fd = socket(AF_UNIX, SOCK_STREAM, 0);
	if (client_fd == -1) {
		perror("socket");
		exit(EXIT_FAILURE);
	}

	// Connect Server
	memset(&server_addr, 0, sizeof(server_addr));
	server_addr.sun_family = AF_UNIX;
	strncpy(server_addr.sun_path, SOCKET_NAME,
		sizeof(server_addr.sun_path) - 1);

	if (connect(client_fd, (struct sockaddr *)&server_addr,
		    sizeof(server_addr)) == -1) {
		perror("connect");
		exit(EXIT_FAILURE);
	}

	socklen_t addrlen = sizeof(peer_addr);
	int rc =
		getpeername(client_fd, (struct sockaddr *)&peer_addr, &addrlen);
	if (rc == -1) {
		perror("getpeername");
		exit(EXIT_FAILURE);
	}
	printf("server path = %s\n", peer_addr.sun_path);
	// Read from server
	memset(buf, 0, BUFFER_SIZE);
	if (read(client_fd, buf, BUFFER_SIZE) == -1) {
		perror("read");
		exit(EXIT_FAILURE);
	}

	printf("Client Received: %s\n", buf);

	// Send message to server
	printf("Client is connected to server\n");
	char *mesg = "Hello from unix socket client";
	if (write(client_fd, mesg, strlen(mesg)) == -1) {
		perror("write");
		exit(EXIT_FAILURE);
	}

	// Close socket
	close(client_fd);

	return 0;
}