Add RPC client daemon.

1 files changed, 89 insertions, 0 deletions

diff --git a/rpc_client_daemon.c b/rpc_client_daemon.c
new file mode 100644
index 0000000..f328302
--- /dev/null
+++ b/rpc_client_daemon.c
@@ -0,0 +1,89 @@
+/*
+ * rpc_client_daemon.c
+ * -------------------
+ * Remote procedure call transport over a socket to a daemon.
+ *
+ * Copyright (c) 2016, NORDUnet A/S All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <sys/un.h>
+
+#include "hal.h"
+#include "hal_internal.h"
+
+#ifndef SOCKET_NAME
+#define SOCKET_NAME "/tmp/cryptechd.socket"
+#endif
+
+static int sock = -1;
+
+hal_error_t hal_rpc_client_transport_init(void)
+{
+    struct sockaddr_un name;
+    int ret;
+
+    sock = socket(AF_UNIX, SOCK_SEQPACKET, 0);
+    if (sock == -1)
+        return perror("socket"), HAL_ERROR_RPC_TRANSPORT;
+    memset(&name, 0, sizeof(struct sockaddr_un));
+    name.sun_family = AF_UNIX;
+    strncpy(name.sun_path, SOCKET_NAME, sizeof(name.sun_path) - 1);
+    ret = connect(sock, (const struct sockaddr *) &name, sizeof(struct sockaddr_un));
+    if (ret == -1)
+        return perror("connect"), HAL_ERROR_RPC_TRANSPORT;
+    return HAL_OK;
+}
+
+hal_error_t hal_rpc_client_transport_close(void)
+{
+    int ret = close(sock);
+    sock = -1;
+    if (ret != 0)
+        return perror("close"), HAL_ERROR_RPC_TRANSPORT;
+    return HAL_OK;
+}
+
+hal_error_t hal_rpc_send(const uint8_t * const buf, const size_t len)
+{
+    ssize_t ret = send(sock, (const void *)buf, len, 0);
+    return (ret == -1) ? HAL_ERROR_RPC_TRANSPORT : HAL_OK;
+}
+
+hal_error_t hal_rpc_recv(uint8_t * const buf, size_t * const len)
+{
+    ssize_t ret = recv(sock, (void *)buf, *len, 0);
+    if (ret == -1)
+	return HAL_ERROR_RPC_TRANSPORT;
+    *len = (size_t)ret;
+    return HAL_OK;
+}