Launch android-clat via netd
This patch adds the commands: "clatd start [interface]", "clatd stop", and
"clatd status"
Change-Id: I4b041d1f13c25108476621d2e2a1e5bac69841f5
Signed-off-by: Daniel Drown <dan-android@drown.org>
Depends-on: If2bc6916fc66fd4bca7cc241c83cfae839b82e15
diff --git a/ClatdController.cpp b/ClatdController.cpp
new file mode 100644
index 0000000..ba4ca27
--- /dev/null
+++ b/ClatdController.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#define LOG_TAG "ClatdController"
+#include <cutils/log.h>
+
+#include "ClatdController.h"
+
+ClatdController::ClatdController() {
+ mClatdPid = 0;
+}
+
+ClatdController::~ClatdController() {
+}
+
+int ClatdController::startClatd(char *interface) {
+ pid_t pid;
+
+ if(mClatdPid != 0) {
+ ALOGE("clatd already running");
+ errno = EBUSY;
+ return -1;
+ }
+
+ ALOGD("starting clatd");
+
+ if ((pid = fork()) < 0) {
+ ALOGE("fork failed (%s)", strerror(errno));
+ return -1;
+ }
+
+ if (!pid) {
+ char **args = (char **)malloc(sizeof(char *) * 4);
+ args[0] = (char *)"/system/bin/clatd";
+ args[1] = (char *)"-i";
+ args[2] = interface;
+ args[3] = NULL;
+
+ if (execv(args[0], args)) {
+ ALOGE("execv failed (%s)", strerror(errno));
+ }
+ ALOGE("Should never get here!");
+ free(args);
+ _exit(0);
+ } else {
+ mClatdPid = pid;
+ ALOGD("clatd started");
+ }
+
+ return 0;
+}
+
+int ClatdController::stopClatd() {
+ if (mClatdPid == 0) {
+ ALOGE("clatd already stopped");
+ return -1;
+ }
+
+ ALOGD("Stopping clatd");
+
+ kill(mClatdPid, SIGTERM);
+ waitpid(mClatdPid, NULL, 0);
+ mClatdPid = 0;
+
+ ALOGD("clatd stopped");
+
+ return 0;
+}
+
+bool ClatdController::isClatdStarted() {
+ pid_t waitpid_status;
+ if(mClatdPid == 0) {
+ return false;
+ }
+ waitpid_status = waitpid(mClatdPid, NULL, WNOHANG);
+ if(waitpid_status != 0) {
+ mClatdPid = 0; // child exited, don't call waitpid on it again
+ }
+ return waitpid_status == 0; // 0 while child is running
+}