Implement vsock socket layer

regression/apps/vsock/vsock_client.c

@@ -0,0 +1,47 @@
+// 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 PORT 1234
+
+int main()
+{
+	int sock;
+	char *hello = "Hello from client";
+	char buffer[1024] = { 0 };
+	struct sockaddr_vm serv_addr;
+
+	if ((sock = socket(AF_VSOCK, SOCK_STREAM, 0)) < 0) {
+		printf("\n Socket creation error\n");
+		return -1;
+	}
+	printf("\n Create socket successfully!\n");
+	serv_addr.svm_family = AF_VSOCK;
+	serv_addr.svm_cid = VMADDR_CID_HOST;
+	serv_addr.svm_port = PORT;
+
+	if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) <
+	    0) {
+		printf("\nConnection Failed \n");
+		return -1;
+	}
+	printf("\n Socket connect successfully!\n");
+
+	// Send message to the server and receive the reply
+	if (send(sock, hello, strlen(hello), 0) < 0) {
+		printf("\nSend Failed\n");
+		return -1;
+	}
+	printf("Hello message sent\n");
+	if (read(sock, buffer, 1024) < 0) {
+		printf("\nRead Failed\n");
+		return -1;
+	}
+	printf("Server: %s\n", buffer);
+	return 0;
+}