PppController.cpp revision 74d8fdd307275bfdf95dcf61d9e6366e87da24ec
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> 201881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 21d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <sys/socket.h> 22d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <sys/stat.h> 231881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <sys/types.h> 241881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <sys/wait.h> 251881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 261881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat#include <dirent.h> 271881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 28d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <netinet/in.h> 29d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <arpa/inet.h> 30d5573d34c8fac49e16b20cf144486125bf940086San Mehat 31d5573d34c8fac49e16b20cf144486125bf940086San Mehat#define LOG_TAG "PppController" 32d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include <cutils/log.h> 33d5573d34c8fac49e16b20cf144486125bf940086San Mehat 34d5573d34c8fac49e16b20cf144486125bf940086San Mehat#include "PppController.h" 35d5573d34c8fac49e16b20cf144486125bf940086San Mehat 36d5573d34c8fac49e16b20cf144486125bf940086San Mehatextern "C" int logwrap(int argc, const char **argv, int background); 37d5573d34c8fac49e16b20cf144486125bf940086San Mehat 38d5573d34c8fac49e16b20cf144486125bf940086San MehatPppController::PppController() { 39d5573d34c8fac49e16b20cf144486125bf940086San Mehat mTtys = new TtyCollection(); 40d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = 0; 41d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 42d5573d34c8fac49e16b20cf144486125bf940086San Mehat 43d5573d34c8fac49e16b20cf144486125bf940086San MehatPppController::~PppController() { 44d5573d34c8fac49e16b20cf144486125bf940086San Mehat TtyCollection::iterator it; 45d5573d34c8fac49e16b20cf144486125bf940086San Mehat 46d5573d34c8fac49e16b20cf144486125bf940086San Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 47d5573d34c8fac49e16b20cf144486125bf940086San Mehat free(*it); 48d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 49d5573d34c8fac49e16b20cf144486125bf940086San Mehat mTtys->clear(); 50d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 51d5573d34c8fac49e16b20cf144486125bf940086San Mehat 52d5573d34c8fac49e16b20cf144486125bf940086San Mehatint PppController::attachPppd(const char *tty, struct in_addr local, 5374d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt struct in_addr remote, struct in_addr dns1, 5474d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt struct in_addr dns2) { 55d5573d34c8fac49e16b20cf144486125bf940086San Mehat pid_t pid; 56d5573d34c8fac49e16b20cf144486125bf940086San Mehat 57d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (mPid) { 58d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("Multiple PPPD instances not currently supported"); 59d5573d34c8fac49e16b20cf144486125bf940086San Mehat errno = EBUSY; 60d5573d34c8fac49e16b20cf144486125bf940086San Mehat return -1; 61d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 62d5573d34c8fac49e16b20cf144486125bf940086San Mehat 631881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat TtyCollection::iterator it; 641881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 651881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (!strcmp(tty, *it)) { 661881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat break; 671881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 681881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 691881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (it == mTtys->end()) { 701881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat LOGE("Invalid tty '%s' specified", tty); 711881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat errno = -EINVAL; 721881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat return -1; 731881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 741881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 75d5573d34c8fac49e16b20cf144486125bf940086San Mehat if ((pid = fork()) < 0) { 76d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("fork failed (%s)", strerror(errno)); 77d5573d34c8fac49e16b20cf144486125bf940086San Mehat return -1; 78d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 79d5573d34c8fac49e16b20cf144486125bf940086San Mehat 80d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (!pid) { 81d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *l = strdup(inet_ntoa(local)); 82d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *r = strdup(inet_ntoa(remote)); 8374d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt char *d1 = strdup(inet_ntoa(dns1)); 8474d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt char *d2 = strdup(inet_ntoa(dns2)); 85d5573d34c8fac49e16b20cf144486125bf940086San Mehat char dev[32]; 86d5573d34c8fac49e16b20cf144486125bf940086San Mehat char *lr; 87d5573d34c8fac49e16b20cf144486125bf940086San Mehat 88d5573d34c8fac49e16b20cf144486125bf940086San Mehat asprintf(&lr, "%s:%s", l, r); 89d5573d34c8fac49e16b20cf144486125bf940086San Mehat 901881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat snprintf(dev, sizeof(dev), "/dev/%s", tty); 91d5573d34c8fac49e16b20cf144486125bf940086San Mehat 92d5573d34c8fac49e16b20cf144486125bf940086San Mehat // TODO: Deal with pppd bailing out after 99999 seconds of being started 93d5573d34c8fac49e16b20cf144486125bf940086San Mehat // but not getting a connection 9474d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt if (execl("/system/bin/pppd", "/system/bin/pppd", "-detach", dev, "115200", 9574d8fdd307275bfdf95dcf61d9e6366e87da24ecRobert Greenwalt lr, "ms-dns", d1, "ms-dns", d2, "debug", "lcp-max-configure", "99999", (char *) NULL)) { 96d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("execl failed (%s)", strerror(errno)); 97d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 98d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("Should never get here!"); 99d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 100d5573d34c8fac49e16b20cf144486125bf940086San Mehat } else { 101d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = pid; 102d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 103d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 104d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 105d5573d34c8fac49e16b20cf144486125bf940086San Mehat 106d5573d34c8fac49e16b20cf144486125bf940086San Mehatint PppController::detachPppd(const char *tty) { 107d5573d34c8fac49e16b20cf144486125bf940086San Mehat 108d5573d34c8fac49e16b20cf144486125bf940086San Mehat if (mPid == 0) { 109d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGE("PPPD already stopped"); 110d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 111d5573d34c8fac49e16b20cf144486125bf940086San Mehat } 112d5573d34c8fac49e16b20cf144486125bf940086San Mehat 113d5573d34c8fac49e16b20cf144486125bf940086San Mehat LOGD("Stopping PPPD services on port %s", tty); 114d5573d34c8fac49e16b20cf144486125bf940086San Mehat kill(mPid, SIGTERM); 1151881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat waitpid(mPid, NULL, 0); 116d5573d34c8fac49e16b20cf144486125bf940086San Mehat mPid = 0; 1171881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat LOGD("PPPD services on port %s stopped", tty); 118d5573d34c8fac49e16b20cf144486125bf940086San Mehat return 0; 119d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 120d5573d34c8fac49e16b20cf144486125bf940086San Mehat 121d5573d34c8fac49e16b20cf144486125bf940086San MehatTtyCollection *PppController::getTtyList() { 1221881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat updateTtyList(); 123d5573d34c8fac49e16b20cf144486125bf940086San Mehat return mTtys; 124d5573d34c8fac49e16b20cf144486125bf940086San Mehat} 125d5573d34c8fac49e16b20cf144486125bf940086San Mehat 1261881762f345d011d079ee318d31f0a8d8ee5891eSan Mehatint PppController::updateTtyList() { 1271881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat TtyCollection::iterator it; 1281881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 1291881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat for (it = mTtys->begin(); it != mTtys->end(); ++it) { 1301881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat free(*it); 1311881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1321881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat mTtys->clear(); 1331881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 1341881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat DIR *d = opendir("/sys/class/tty"); 1351881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (!d) { 1361881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat LOGE("Error opening /sys/class/tty (%s)", strerror(errno)); 1371881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat return -1; 1381881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1391881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat 1401881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat struct dirent *de; 1411881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat while ((de = readdir(d))) { 1421881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if (de->d_name[0] == '.') 1431881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat continue; 1441881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat if ((!strncmp(de->d_name, "tty", 3)) && (strlen(de->d_name) > 3)) { 1451881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat mTtys->push_back(strdup(de->d_name)); 1461881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1471881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat } 1481881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat closedir(d); 1491881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat return 0; 1501881762f345d011d079ee318d31f0a8d8ee5891eSan Mehat} 151