netd: Add support for attaching/detaching PPP daemons
Signed-off-by: San Mehat <san@google.com>
diff --git a/PppController.cpp b/PppController.cpp
new file mode 100644
index 0000000..93789a9
--- /dev/null
+++ b/PppController.cpp
@@ -0,0 +1,104 @@
+/*
+ * 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 <stdlib.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define LOG_TAG "PppController"
+#include <cutils/log.h>
+
+#include "PppController.h"
+
+extern "C" int logwrap(int argc, const char **argv, int background);
+
+static char IPTABLES_PATH[] = "/system/bin/iptables";
+
+PppController::PppController() {
+ mTtys = new TtyCollection();
+ mPid = 0;
+}
+
+PppController::~PppController() {
+ TtyCollection::iterator it;
+
+ for (it = mTtys->begin(); it != mTtys->end(); ++it) {
+ free(*it);
+ }
+ mTtys->clear();
+}
+
+int PppController::attachPppd(const char *tty, struct in_addr local,
+ struct in_addr remote) {
+ pid_t pid;
+
+ if (mPid) {
+ LOGE("Multiple PPPD instances not currently supported");
+ errno = EBUSY;
+ return -1;
+ }
+
+ if ((pid = fork()) < 0) {
+ LOGE("fork failed (%s)", strerror(errno));
+ return -1;
+ }
+
+ if (!pid) {
+ char *l = strdup(inet_ntoa(local));
+ char *r = strdup(inet_ntoa(remote));
+ char dev[32];
+ char *lr;
+
+ asprintf(&lr, "%s:%s", l, r);
+
+ snprintf(dev, sizeof(dev), "/dev/%s", tty); // TODO: STOPSHIP Validate this
+
+ // TODO: Deal with pppd bailing out after 99999 seconds of being started
+ // but not getting a connection
+ if (execl("/system/bin/pppd", "/system/bin/pppd", "-detach", dev,
+ "115200", lr, "debug", "lcp-max-configure", "99999", (char *) NULL)) {
+ LOGE("execl failed (%s)", strerror(errno));
+ }
+ LOGE("Should never get here!");
+ return 0;
+ } else {
+ mPid = pid;
+ }
+ return 0;
+}
+
+int PppController::detachPppd(const char *tty) {
+
+ if (mPid == 0) {
+ LOGE("PPPD already stopped");
+ return 0;
+ }
+
+ LOGD("Stopping PPPD services on port %s", tty);
+
+ kill(mPid, SIGTERM);
+ mPid = 0;
+ return 0;
+}
+
+TtyCollection *PppController::getTtyList() {
+ return mTtys;
+}
+