PppController.cpp revision ff2c0d8c13457e43f0d4bf06d3177271aac104c1
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> 191881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <fcntl.h> 20ff2c0d8c13457e43f0d4bf06d3177271aac104c1Olivier Bailly#include <string.h> 211881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 22d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <sys/socket.h> 23d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <sys/stat.h> 241881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <sys/types.h> 251881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <sys/wait.h> 261881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 271881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <dirent.h> 281881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 29d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <netinet/in.h> 30d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <arpa/inet.h> 31d5573d34c8fac49e16b20cf144486125bf940086San Mehat 32d5573d34c8fac49e16b20cf144486125bf940086San Mehat#define LOG_TAG "PppController" 33d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <cutils/log.h> 34d5573d34c8fac49e16b20cf144486125bf940086San Mehat 35d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include "PppController.h" 36d5573d34c8fac49e16b20cf144486125bf940086San Mehat 37d5573d34c8fac49e16b20cf144486125bf940086San Mehatextern "C" int logwrap(int argc, const char **argv, int background); 38d5573d34c8fac49e16b20cf144486125bf940086San Mehat 39d5573d34c8fac49e16b20cf144486125bf940086San MehatPppController::PppController() { 40d5573d34c8fac49e16b20cf144486125bf940086San Mehat mTtys = new TtyCollection(); 41d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = 0; 42d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 43d5573d34c8fac49e16b20cf144486125bf940086San Mehat 44d5573d34c8fac49e16b20cf144486125bf940086San MehatPppController::~PppController() { 45d5573d34c8fac49e16b20cf144486125bf940086San Mehat TtyCollection::iterator it; 46d5573d34c8fac49e16b20cf144486125bf940086San Mehat 47d5573d34c8fac49e16b20cf144486125bf940086San Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 48d5573d34c8fac49e16b20cf144486125bf940086San Mehat free(*it); 49d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 50d5573d34c8fac49e16b20cf144486125bf940086San Mehat mTtys->clear(); 51d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 52d5573d34c8fac49e16b20cf144486125bf940086San Mehat 53d5573d34c8fac49e16b20cf144486125bf940086San Mehatint PppController::attachPppd(const char *tty, struct in_addr local, 5474d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt struct in_addr remote, struct in_addr dns1, 5574d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt struct in_addr dns2) { 56d5573d34c8fac49e16b20cf144486125bf940086San Mehat pid_t pid; 57d5573d34c8fac49e16b20cf144486125bf940086San Mehat 58d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (mPid) { 59d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("Multiple PPPD instances not currently supported"); 60d5573d34c8fac49e16b20cf144486125bf940086San Mehat errno = EBUSY; 61d5573d34c8fac49e16b20cf144486125bf940086San Mehat return -1; 62d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 63d5573d34c8fac49e16b20cf144486125bf940086San Mehat 641881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat TtyCollection::iterator it; 651881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 661881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (!strcmp(tty, *it)) { 671881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat break; 681881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 691881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 701881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (it == mTtys->end()) { 711881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat LOGE("Invalid tty '%s' specified", tty); 721881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat errno = -EINVAL; 731881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat return -1; 741881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 751881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 76d5573d34c8fac49e16b20cf144486125bf940086San Mehat if ((pid = fork()) < 0) { 77d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("fork failed (%s)", strerror(errno)); 78d5573d34c8fac49e16b20cf144486125bf940086San Mehat return -1; 79d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 80d5573d34c8fac49e16b20cf144486125bf940086San Mehat 81d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (!pid) { 82d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *l = strdup(inet_ntoa(local)); 83d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *r = strdup(inet_ntoa(remote)); 8474d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt char *d1 = strdup(inet_ntoa(dns1)); 8574d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt char *d2 = strdup(inet_ntoa(dns2)); 86d5573d34c8fac49e16b20cf144486125bf940086San Mehat char dev[32]; 87d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *lr; 88d5573d34c8fac49e16b20cf144486125bf940086San Mehat 89d5573d34c8fac49e16b20cf144486125bf940086San Mehat asprintf(&lr, "%s:%s", l, r); 90d5573d34c8fac49e16b20cf144486125bf940086San Mehat 911881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat snprintf(dev, sizeof(dev), "/dev/%s", tty); 92d5573d34c8fac49e16b20cf144486125bf940086San Mehat 93d5573d34c8fac49e16b20cf144486125bf940086San Mehat // TODO: Deal with pppd bailing out after 99999 seconds of being started 94d5573d34c8fac49e16b20cf144486125bf940086San Mehat // but not getting a connection 9574d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt if (execl("/system/bin/pppd", "/system/bin/pppd", "-detach", dev, "115200", 9673ea55b52895727635705f18629406c58ca2044cRobert Greenwalt lr, "ms-dns", d1, "ms-dns", d2, "lcp-max-configure", "99999", (char *) NULL)) { 97d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("execl failed (%s)", strerror(errno)); 98d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 99d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("Should never get here!"); 100d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 101d5573d34c8fac49e16b20cf144486125bf940086San Mehat } else { 102d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = pid; 103d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 104d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 105d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 106d5573d34c8fac49e16b20cf144486125bf940086San Mehat 107d5573d34c8fac49e16b20cf144486125bf940086San Mehatint PppController::detachPppd(const char *tty) { 108d5573d34c8fac49e16b20cf144486125bf940086San Mehat 109d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (mPid == 0) { 110d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("PPPD already stopped"); 111d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 112d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 113d5573d34c8fac49e16b20cf144486125bf940086San Mehat 114d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGD("Stopping PPPD services on port %s", tty); 115d5573d34c8fac49e16b20cf144486125bf940086San Mehat kill(mPid, SIGTERM); 1161881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat waitpid(mPid, NULL, 0); 117d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = 0; 1181881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat LOGD("PPPD services on port %s stopped", tty); 119d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 120d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 121d5573d34c8fac49e16b20cf144486125bf940086San Mehat 122d5573d34c8fac49e16b20cf144486125bf940086San MehatTtyCollection *PppController::getTtyList() { 1231881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat updateTtyList(); 124d5573d34c8fac49e16b20cf144486125bf940086San Mehat return mTtys; 125d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 126d5573d34c8fac49e16b20cf144486125bf940086San Mehat 1271881762f345d011d079ee318d31f0a8d8ee5891eSan Mehatint PppController::updateTtyList() { 1281881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat TtyCollection::iterator it; 1291881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 1301881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 1311881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat free(*it); 1321881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1331881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat mTtys->clear(); 1341881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 1351881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat DIR *d = opendir("/sys/class/tty"); 1361881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (!d) { 1371881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat LOGE("Error opening /sys/class/tty (%s)", strerror(errno)); 1381881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat return -1; 1391881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1401881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 1411881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat struct dirent *de; 1421881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat while ((de = readdir(d))) { 1431881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (de->d_name[0] == '.') 1441881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat continue; 1451881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if ((!strncmp(de->d_name, "tty", 3)) && (strlen(de->d_name) > 3)) { 1461881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat mTtys->push_back(strdup(de->d_name)); 1471881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1481881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1491881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat closedir(d); 1501881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat return 0; 1511881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat} 152