[PATCH] Add RPC support for DHCPv4 client
Cherry-picked from
https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/
master/net-misc/dhcpcd/files/patches/dhcpcd-6.8.2-Add-RPC-support-for-
DHCPv4-client.patch.
Define a RPC interface for the daemon to interact with other
applications (command execution and status update), and integrate
it with the DHCPv4 client. Default to stub implementation for now
until new RPC mechanism is implemented and enabled.
Also add a new compiler flag "PASSIVE_MODE" which will be enabled
when a RPC mechanism is enabled (e.g. DBus). This compiler flag
will prevent the daemon from modifying system configurations
(e.g. routing table, interface address). The idea is that when
RPC is enabled, the daemon will provide configurations through
RPC, and the remote application will be the one responsible for
modifying system configurations.
Integration with DHCPv6 client will be added in the future.
BUG: 22956197
Change-Id: I7147d13e2cfab5c209c1ab862f33ef9d1b1dddaf
Reviewed-on: https://chromium-review.googlesource.com/208835
Review URL: http://codereview.chromium.org/3061018
diff --git a/rpc-stub.c b/rpc-stub.c
new file mode 100644
index 0000000..aa65097
--- /dev/null
+++ b/rpc-stub.c
@@ -0,0 +1,69 @@
+/*
+ * dhcpcd - DHCP client daemon
+ * Copyright (c) 2006-2015 Roy Marples <[email protected]>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 "rpc-interface.h"
+
+int
+rpc_init(struct dhcpcd_ctx *ctx)
+{
+ /* Stub implementation. */
+ return 0;
+}
+
+void
+rpc_close(void)
+{
+ /* Stub implementation. */
+}
+
+void
+rpc_signal_status(const char *reason)
+{
+ /* Stub implementation. */
+}
+
+int
+rpc_update_ipv4(struct interface *ifp)
+{
+ /* Stub implementation. */
+ return 0;
+}
+
+int
+rpc_update_ipv6(struct interface *ifp)
+{
+ /* Stub implementation. */
+ return 0;
+}
+
+int
+rpc_notify_unicast_arp(struct interface *ifp)
+{
+ /* Stub implementation. */
+ return 0;
+}
+
