PppController.cpp revision d5573d34c8fac49e16b20cf144486125bf940086
1d5573d34c8fac49e16b20cf144486125bf940086San Mehat/* 2d5573d34c8fac49e16b20cf144486125bf940086San Mehat * Copyright (C) 2008 The Android Open Source Project 3d5573d34c8fac49e16b20cf144486125bf940086San Mehat * 4d5573d34c8fac49e16b20cf144486125bf940086San Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 5d5573d34c8fac49e16b20cf144486125bf940086San Mehat * you may not use this file except in compliance with the License. 6d5573d34c8fac49e16b20cf144486125bf940086San Mehat * You may obtain a copy of the License at 7d5573d34c8fac49e16b20cf144486125bf940086San Mehat * 8d5573d34c8fac49e16b20cf144486125bf940086San Mehat * http://www.apache.org/licenses/LICENSE-2.0 9d5573d34c8fac49e16b20cf144486125bf940086San Mehat * 10d5573d34c8fac49e16b20cf144486125bf940086San Mehat * Unless required by applicable law or agreed to in writing, software 11d5573d34c8fac49e16b20cf144486125bf940086San Mehat * distributed under the License is distributed on an "AS IS" BASIS, 12d5573d34c8fac49e16b20cf144486125bf940086San Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13d5573d34c8fac49e16b20cf144486125bf940086San Mehat * See the License for the specific language governing permissions and 14d5573d34c8fac49e16b20cf144486125bf940086San Mehat * limitations under the License. 15d5573d34c8fac49e16b20cf144486125bf940086San Mehat */ 16d5573d34c8fac49e16b20cf144486125bf940086San Mehat 17d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <stdlib.h> 18d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <errno.h> 19d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <sys/socket.h> 20d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <sys/stat.h> 21d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <fcntl.h> 22d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <netinet/in.h> 23d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <arpa/inet.h> 24d5573d34c8fac49e16b20cf144486125bf940086San Mehat 25d5573d34c8fac49e16b20cf144486125bf940086San Mehat#define LOG_TAG "PppController" 26d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <cutils/log.h> 27d5573d34c8fac49e16b20cf144486125bf940086San Mehat 28d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include "PppController.h" 29d5573d34c8fac49e16b20cf144486125bf940086San Mehat 30d5573d34c8fac49e16b20cf144486125bf940086San Mehatextern "C" int logwrap(int argc, const char **argv, int background); 31d5573d34c8fac49e16b20cf144486125bf940086San Mehat 32d5573d34c8fac49e16b20cf144486125bf940086San Mehatstatic char IPTABLES_PATH[] = "/system/bin/iptables"; 33d5573d34c8fac49e16b20cf144486125bf940086San Mehat 34d5573d34c8fac49e16b20cf144486125bf940086San MehatPppController::PppController() { 35d5573d34c8fac49e16b20cf144486125bf940086San Mehat mTtys = new TtyCollection(); 36d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = 0; 37d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 38d5573d34c8fac49e16b20cf144486125bf940086San Mehat 39d5573d34c8fac49e16b20cf144486125bf940086San MehatPppController::~PppController() { 40d5573d34c8fac49e16b20cf144486125bf940086San Mehat TtyCollection::iterator it; 41d5573d34c8fac49e16b20cf144486125bf940086San Mehat 42d5573d34c8fac49e16b20cf144486125bf940086San Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 43d5573d34c8fac49e16b20cf144486125bf940086San Mehat free(*it); 44d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 45d5573d34c8fac49e16b20cf144486125bf940086San Mehat mTtys->clear(); 46d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 47d5573d34c8fac49e16b20cf144486125bf940086San Mehat 48d5573d34c8fac49e16b20cf144486125bf940086San Mehatint PppController::attachPppd(const char *tty, struct in_addr local, 49d5573d34c8fac49e16b20cf144486125bf940086San Mehat struct in_addr remote) { 50d5573d34c8fac49e16b20cf144486125bf940086San Mehat pid_t pid; 51d5573d34c8fac49e16b20cf144486125bf940086San Mehat 52d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (mPid) { 53d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("Multiple PPPD instances not currently supported"); 54d5573d34c8fac49e16b20cf144486125bf940086San Mehat errno = EBUSY; 55d5573d34c8fac49e16b20cf144486125bf940086San Mehat return -1; 56d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 57d5573d34c8fac49e16b20cf144486125bf940086San Mehat 58d5573d34c8fac49e16b20cf144486125bf940086San Mehat if ((pid = fork()) < 0) { 59d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("fork failed (%s)", strerror(errno)); 60d5573d34c8fac49e16b20cf144486125bf940086San Mehat return -1; 61d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 62d5573d34c8fac49e16b20cf144486125bf940086San Mehat 63d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (!pid) { 64d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *l = strdup(inet_ntoa(local)); 65d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *r = strdup(inet_ntoa(remote)); 66d5573d34c8fac49e16b20cf144486125bf940086San Mehat char dev[32]; 67d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *lr; 68d5573d34c8fac49e16b20cf144486125bf940086San Mehat 69d5573d34c8fac49e16b20cf144486125bf940086San Mehat asprintf(&lr, "%s:%s", l, r); 70d5573d34c8fac49e16b20cf144486125bf940086San Mehat 71d5573d34c8fac49e16b20cf144486125bf940086San Mehat snprintf(dev, sizeof(dev), "/dev/%s", tty); // TODO: STOPSHIP Validate this 72d5573d34c8fac49e16b20cf144486125bf940086San Mehat 73d5573d34c8fac49e16b20cf144486125bf940086San Mehat // TODO: Deal with pppd bailing out after 99999 seconds of being started 74d5573d34c8fac49e16b20cf144486125bf940086San Mehat // but not getting a connection 75d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (execl("/system/bin/pppd", "/system/bin/pppd", "-detach", dev, 76d5573d34c8fac49e16b20cf144486125bf940086San Mehat "115200", lr, "debug", "lcp-max-configure", "99999", (char *) NULL)) { 77d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("execl failed (%s)", strerror(errno)); 78d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 79d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("Should never get here!"); 80d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 81d5573d34c8fac49e16b20cf144486125bf940086San Mehat } else { 82d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = pid; 83d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 84d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 85d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 86d5573d34c8fac49e16b20cf144486125bf940086San Mehat 87d5573d34c8fac49e16b20cf144486125bf940086San Mehatint PppController::detachPppd(const char *tty) { 88d5573d34c8fac49e16b20cf144486125bf940086San Mehat 89d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (mPid == 0) { 90d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("PPPD already stopped"); 91d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 92d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 93d5573d34c8fac49e16b20cf144486125bf940086San Mehat 94d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGD("Stopping PPPD services on port %s", tty); 95d5573d34c8fac49e16b20cf144486125bf940086San Mehat 96d5573d34c8fac49e16b20cf144486125bf940086San Mehat kill(mPid, SIGTERM); 97d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = 0; 98d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 99d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 100d5573d34c8fac49e16b20cf144486125bf940086San Mehat 101d5573d34c8fac49e16b20cf144486125bf940086San MehatTtyCollection *PppController::getTtyList() { 102d5573d34c8fac49e16b20cf144486125bf940086San Mehat return mTtys; 103d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 104d5573d34c8fac49e16b20cf144486125bf940086San Mehat 105