tools: acrn-crashlog: socket APIs for client/server

This patch is the initialization patch for socket protocol APIs.
It adds the socket APIs for client and server.

Signed-off-by: xiaojin2 <xiaojing.liu@intel.com>
Signed-off-by: CHEN Gang <gang.c.chen@intel.com>
Reviewed-by: Zhang Yanmin <yanmin.zhang@intel.com>
Reviewed-by: Liu Chuansheng <chuansheng.liu@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
Acked-by: Eddie Dong <Eddie.dong@intel.com>

tools/acrn-crashlog/usercrash/include/protocol.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) <2018> Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PROTOCOL_H
+#define PROTOCOL_H
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/cdefs.h>
+
+#define RESERVED_SOCKET_PREFIX "/tmp/"
+
+int linux_get_control_socket(const char *name);
+
+int socket_local_client(const char *name, int type);
+ssize_t send_fd(int sockfd, const void *data, size_t len, int fd);
+ssize_t recv_fd(int sockfd, void *data, size_t len, int *out_fd);
+
+#endif