Start using IP tool for advanced routing.
bug:5495862
bug:5396842
Change-Id: I51f21060947f57e63b18c4d35e9d49fac488d48a
diff --git a/SecondaryTableController.cpp b/SecondaryTableController.cpp
new file mode 100644
index 0000000..d6f6825
--- /dev/null
+++ b/SecondaryTableController.cpp
@@ -0,0 +1,128 @@
+/*
+ * 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 <fcntl.h>
+#include <string.h>
+
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define LOG_TAG "SecondaryTablController"
+#include <cutils/log.h>
+#include <cutils/properties.h>
+
+#include "ResponseCode.h"
+#include "SecondaryTableController.h"
+
+static char IP_PATH[] = "/system/bin/ip";
+
+SecondaryTableController::SecondaryTableController() {
+ int i;
+ for (i=0; i < INTERFACES_TRACKED; i++) {
+ mInterfaceTable[i][0] = 0;
+ // TODO - use a hashtable or other prebuilt container class
+ mInterfaceRuleCount[i] = 0;
+ }
+}
+
+SecondaryTableController::~SecondaryTableController() {
+}
+
+int SecondaryTableController::findTableNumber(const char *iface) {
+ int i;
+ for (i = 0; i < INTERFACES_TRACKED; i++) {
+ if (strncmp(iface, mInterfaceTable[i], MAX_IFACE_LENGTH) == 0) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+int SecondaryTableController::addRoute(SocketClient *cli, char *iface, char *dest, int prefix,
+ char *gateway) {
+ char *cmd;
+
+ int tableIndex = findTableNumber(iface);
+ if (tableIndex == -1) {
+ tableIndex = findTableNumber(""); // look for an empty slot
+ if (tableIndex == -1) {
+ LOGE("Max number of NATed interfaces reached");
+ errno = ENODEV;
+ cli->sendMsg(ResponseCode::OperationFailed, "Max number NATed", true);
+ return -1;
+ }
+ strncpy(mInterfaceTable[tableIndex], iface, MAX_IFACE_LENGTH);
+ }
+
+ asprintf(&cmd, "%s route add %s/%d via %s table %d",
+ IP_PATH, dest, prefix, gateway, tableIndex+BASE_TABLE_NUMBER);
+ if (runAndFree(cli, cmd)) {
+ LOGE("ip route add failed: %s", cmd);
+ errno = ENODEV;
+ cli->sendMsg(ResponseCode::OperationFailed, "ip route add failed", true);
+ return -1;
+ }
+ mInterfaceRuleCount[tableIndex]++;
+ cli->sendMsg(ResponseCode::CommandOkay, "Route added", false);
+ return 0;
+}
+
+int SecondaryTableController::removeRoute(SocketClient *cli, char *iface, char *dest, int prefix,
+ char *gateway) {
+ char *cmd;
+ int tableIndex = findTableNumber(iface);
+ if (tableIndex == -1) {
+ LOGE("Interface not found");
+ errno = ENODEV;
+ cli->sendMsg(ResponseCode::OperationFailed, "Interface not found", true);
+ return -1;
+ }
+
+ asprintf(&cmd, "%s route del %s/%d via %s table %d",
+ IP_PATH, dest, prefix, gateway, tableIndex+BASE_TABLE_NUMBER);
+ if (runAndFree(cli, cmd)) {
+ LOGE("ip route del failed");
+ errno = ENODEV;
+ cli->sendMsg(ResponseCode::OperationFailed, "ip route del failed", true);
+ return -1;
+ }
+ if (--mInterfaceRuleCount[tableIndex]<1) {
+ mInterfaceTable[tableIndex][0]=0;
+ }
+ cli->sendMsg(ResponseCode::CommandOkay, "Route removed", false);
+ return 0;
+}
+
+int SecondaryTableController::runAndFree(SocketClient *cli, char *cmd) {
+ int ret = 0;
+ if (strlen(cmd) >= 255) {
+ LOGE("ip command (%s) too long", cmd);
+ errno = E2BIG;
+ cli->sendMsg(ResponseCode::CommandSyntaxError, "Too long", true);
+ free(cmd);
+ return -1;
+ }
+ ret = system(cmd);
+ free(cmd);
+ return ret;
+}