Implement vsock socket layer

regression/apps/vsock/vsock_server.c

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: MPL-2.0
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <linux/vm_sockets.h>
+#include <unistd.h>
+#include <string.h>
+
+#define CID 3
+#define PORT 4321
+
+int main()
+{
+	int sock, new_sock;
+	char *hello = "Hello from client";
+	char buffer[1024] = { 0 };
+	struct sockaddr_vm serv_addr, client_addr;
+	int addrlen = sizeof(client_addr);
+
+	if ((sock = socket(AF_VSOCK, SOCK_STREAM, 0)) < 0) {
+		printf("\n Socket creation error\n");
+		return -1;
+	}
+	printf("\nCreate socket successfully\n");
+	serv_addr.svm_family = AF_VSOCK;
+	serv_addr.svm_cid = CID;
+	serv_addr.svm_port = PORT;
+
+	if (bind(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
+		printf("\nBind Failed \n");
+		return -1;
+	}
+	printf("\nBind socket successfully\n");
+
+	if (listen(sock, 3) < 0) {
+		printf("\nListen Failed\n");
+		return -1;
+	}
+	printf("\nListen socket successfully\n");
+
+	if ((new_sock = accept(sock, (struct sockaddr *)&client_addr,
+			       (socklen_t *)&addrlen)) < 0) {
+		printf("\nAccept Failed\n");
+		return -1;
+	}
+	printf("\nAccept socket successfully\n");
+
+	// Send message to the server and receive the reply
+	if (read(new_sock, buffer, 1024) < 0) {
+		printf("\nRead Failed\n");
+		return -1;
+	}
+	printf("Client: %s\n", buffer);
+	if (send(new_sock, hello, strlen(hello), 0) < 0) {
+		printf("\nSend Failed\n");
+		return -1;
+	}
+	printf("Hello message sent\n");
+	return 0;
+}