TetherController.cpp revision 9997f9a3edac2baac244c2fe8e49685a3be9f482
19d10b341a0ba46f108cb96e46691197d778cbc06San Mehat/* 29d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * Copyright (C) 2008 The Android Open Source Project 39d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * 49d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 59d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * you may not use this file except in compliance with the License. 69d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * You may obtain a copy of the License at 79d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * 89d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * http://www.apache.org/licenses/LICENSE-2.0 99d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * 109d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * Unless required by applicable law or agreed to in writing, software 119d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * distributed under the License is distributed on an "AS IS" BASIS, 129d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * See the License for the specific language governing permissions and 149d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * limitations under the License. 159d10b341a0ba46f108cb96e46691197d778cbc06San Mehat */ 169d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 179d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <stdlib.h> 189d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <errno.h> 1918737845d3c6a60edd6f75ac441a1b3fed6d66a7San Mehat#include <fcntl.h> 20ff2c0d8c13457e43f0d4bf06d3177271aac104c1Olivier Bailly#include <string.h> 2118737845d3c6a60edd6f75ac441a1b3fed6d66a7San Mehat 229d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <sys/socket.h> 239d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <sys/stat.h> 2418737845d3c6a60edd6f75ac441a1b3fed6d66a7San Mehat#include <sys/types.h> 2518737845d3c6a60edd6f75ac441a1b3fed6d66a7San Mehat#include <sys/wait.h> 2618737845d3c6a60edd6f75ac441a1b3fed6d66a7San Mehat 279d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <netinet/in.h> 289d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <arpa/inet.h> 299d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 309d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#define LOG_TAG "TetherController" 319d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include <cutils/log.h> 326b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo#include <cutils/properties.h> 339d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 349d10b341a0ba46f108cb96e46691197d778cbc06San Mehat#include "TetherController.h" 359d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 369d10b341a0ba46f108cb96e46691197d778cbc06San MehatTetherController::TetherController() { 379d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mInterfaces = new InterfaceCollection(); 389d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDnsForwarders = new NetAddressCollection(); 399d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDaemonFd = -1; 409d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDaemonPid = 0; 419d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 429d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 439d10b341a0ba46f108cb96e46691197d778cbc06San MehatTetherController::~TetherController() { 449d10b341a0ba46f108cb96e46691197d778cbc06San Mehat InterfaceCollection::iterator it; 459d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 469d10b341a0ba46f108cb96e46691197d778cbc06San Mehat for (it = mInterfaces->begin(); it != mInterfaces->end(); ++it) { 479d10b341a0ba46f108cb96e46691197d778cbc06San Mehat free(*it); 489d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 499d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mInterfaces->clear(); 509d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 519d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDnsForwarders->clear(); 529d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 539d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 549d10b341a0ba46f108cb96e46691197d778cbc06San Mehatint TetherController::setIpFwdEnabled(bool enable) { 559d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 567b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Setting IP forward enable = %d", enable); 576b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo 586b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo // In BP tools mode, do not disable IP forwarding 596b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo char bootmode[PROPERTY_VALUE_MAX] = {0}; 606b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo property_get("ro.bootmode", bootmode, "unknown"); 616b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo if ((enable == false) && (0 == strcmp("bp-tools", bootmode))) { 626b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo return 0; 636b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo } 646b858eb3b9b94b19c5153311e10b6e832722fb8eKazuhiro Ondo 659d10b341a0ba46f108cb96e46691197d778cbc06San Mehat int fd = open("/proc/sys/net/ipv4/ip_forward", O_WRONLY); 669d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (fd < 0) { 675ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Failed to open ip_forward (%s)", strerror(errno)); 689d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 699d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 709d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 719d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (write(fd, (enable ? "1" : "0"), 1) != 1) { 725ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Failed to write ip_forward (%s)", strerror(errno)); 7337dc4a51774b9c8a95205cb825eae6753170a851Robert Greenwalt close(fd); 749d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 759d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 769d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(fd); 779d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 789d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 799d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 809d10b341a0ba46f108cb96e46691197d778cbc06San Mehatbool TetherController::getIpFwdEnabled() { 819d10b341a0ba46f108cb96e46691197d778cbc06San Mehat int fd = open("/proc/sys/net/ipv4/ip_forward", O_RDONLY); 829d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 839d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (fd < 0) { 845ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Failed to open ip_forward (%s)", strerror(errno)); 859d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return false; 869d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 879d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 889d10b341a0ba46f108cb96e46691197d778cbc06San Mehat char enabled; 899d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (read(fd, &enabled, 1) != 1) { 905ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Failed to read ip_forward (%s)", strerror(errno)); 9137dc4a51774b9c8a95205cb825eae6753170a851Robert Greenwalt close(fd); 929d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 939d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 949d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 959d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(fd); 969d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return (enabled == '1' ? true : false); 979d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 989d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 993208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwaltint TetherController::startTethering(int num_addrs, struct in_addr* addrs) { 1009d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (mDaemonPid != 0) { 1015ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Tethering already started"); 1029d10b341a0ba46f108cb96e46691197d778cbc06San Mehat errno = EBUSY; 1039d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 1049d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1059d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1067b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Starting tethering services"); 1079d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1089d10b341a0ba46f108cb96e46691197d778cbc06San Mehat pid_t pid; 1099d10b341a0ba46f108cb96e46691197d778cbc06San Mehat int pipefd[2]; 1109d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1119d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (pipe(pipefd) < 0) { 1125ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("pipe failed (%s)", strerror(errno)); 1139d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 1149d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1159d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1169d10b341a0ba46f108cb96e46691197d778cbc06San Mehat /* 1179d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * TODO: Create a monitoring thread to handle and restart 1189d10b341a0ba46f108cb96e46691197d778cbc06San Mehat * the daemon if it exits prematurely 1199d10b341a0ba46f108cb96e46691197d778cbc06San Mehat */ 1209d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if ((pid = fork()) < 0) { 1215ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("fork failed (%s)", strerror(errno)); 1229d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(pipefd[0]); 1239d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(pipefd[1]); 1249d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 1259d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1269d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1279d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (!pid) { 1289d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(pipefd[1]); 1299d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (pipefd[0] != STDIN_FILENO) { 1309d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (dup2(pipefd[0], STDIN_FILENO) != STDIN_FILENO) { 1315ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("dup2 failed (%s)", strerror(errno)); 1329d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 1339d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1349d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(pipefd[0]); 1359d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1369d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1379997f9a3edac2baac244c2fe8e49685a3be9f482Jean-Baptiste Queru int num_processed_args = 7 + (num_addrs/2) + 1; // 1 null for termination 1383208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt char **args = (char **)malloc(sizeof(char *) * num_processed_args); 1393208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt args[num_processed_args - 1] = NULL; 1403208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt args[0] = (char *)"/system/bin/dnsmasq"; 141b756f69226d86380ea88b9330356c9fd210dbafePeter Nilsson args[1] = (char *)"--keep-in-foreground"; 1423208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt args[2] = (char *)"--no-resolv"; 1433208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt args[3] = (char *)"--no-poll"; 1446df79da87b57437505eedd7fdf5359f9e67c38ddJeff Sharkey // TODO: pipe through metered status from ConnService 1456df79da87b57437505eedd7fdf5359f9e67c38ddJeff Sharkey args[4] = (char *)"--dhcp-option-force=43,ANDROID_METERED"; 1469997f9a3edac2baac244c2fe8e49685a3be9f482Jean-Baptiste Queru args[5] = (char *)"--pid-file"; 1479997f9a3edac2baac244c2fe8e49685a3be9f482Jean-Baptiste Queru args[6] = (char *)""; 1483208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt 1499997f9a3edac2baac244c2fe8e49685a3be9f482Jean-Baptiste Queru int nextArg = 7; 1503208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt for (int addrIndex=0; addrIndex < num_addrs;) { 1513208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt char *start = strdup(inet_ntoa(addrs[addrIndex++])); 1523208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt char *end = strdup(inet_ntoa(addrs[addrIndex++])); 1533208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt asprintf(&(args[nextArg++]),"--dhcp-range=%s,%s,1h", start, end); 1543208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt } 1559d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1563208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt if (execv(args[0], args)) { 1575ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("execl failed (%s)", strerror(errno)); 1589d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1595ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Should never get here!"); 1603208ea0b6cce28e7aef8459d548fd86df329e34fRobert Greenwalt free(args); 1619d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 1629d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } else { 1639d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(pipefd[0]); 1649d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDaemonPid = pid; 1659d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDaemonFd = pipefd[1]; 1667b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Tethering services running"); 1679d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1689d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1699d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 1709d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 1719d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1729d10b341a0ba46f108cb96e46691197d778cbc06San Mehatint TetherController::stopTethering() { 1739d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1749d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (mDaemonPid == 0) { 1755ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Tethering already stopped"); 1769d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 1779d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 1789d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1797b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Stopping tethering services"); 1809d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1819d10b341a0ba46f108cb96e46691197d778cbc06San Mehat kill(mDaemonPid, SIGTERM); 18218737845d3c6a60edd6f75ac441a1b3fed6d66a7San Mehat waitpid(mDaemonPid, NULL, 0); 1839d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDaemonPid = 0; 1849d10b341a0ba46f108cb96e46691197d778cbc06San Mehat close(mDaemonFd); 1859d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDaemonFd = -1; 1867b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Tethering services stopped"); 1879d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 1889d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 1899d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 1909d10b341a0ba46f108cb96e46691197d778cbc06San Mehatbool TetherController::isTetheringStarted() { 1919d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return (mDaemonPid == 0 ? false : true); 1929d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 1939d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 194cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root#define MAX_CMD_SIZE 1024 195cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root 1969d10b341a0ba46f108cb96e46691197d778cbc06San Mehatint TetherController::setDnsForwarders(char **servers, int numServers) { 1979d10b341a0ba46f108cb96e46691197d778cbc06San Mehat int i; 198cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root char daemonCmd[MAX_CMD_SIZE]; 1999d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2009d10b341a0ba46f108cb96e46691197d778cbc06San Mehat strcpy(daemonCmd, "update_dns"); 201cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root int cmdLen = strlen(daemonCmd); 2029d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2039d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDnsForwarders->clear(); 2049d10b341a0ba46f108cb96e46691197d778cbc06San Mehat for (i = 0; i < numServers; i++) { 2057b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("setDnsForwarders(%d = '%s')", i, servers[i]); 2069d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2079d10b341a0ba46f108cb96e46691197d778cbc06San Mehat struct in_addr a; 2089d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2099d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (!inet_aton(servers[i], &a)) { 2105ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Failed to parse DNS server '%s'", servers[i]); 2119d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDnsForwarders->clear(); 2129d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 2139d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 214cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root 215cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root cmdLen += strlen(servers[i]); 216cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root if (cmdLen + 2 >= MAX_CMD_SIZE) { 2177b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Too many DNS servers listed"); 218cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root break; 219cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root } 220cf52faf90be32aab3d0c4736a95f26923227e475Kenny Root 2219d10b341a0ba46f108cb96e46691197d778cbc06San Mehat strcat(daemonCmd, ":"); 2229d10b341a0ba46f108cb96e46691197d778cbc06San Mehat strcat(daemonCmd, servers[i]); 2239d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDnsForwarders->push_back(a); 2249d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 2259d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2269d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (mDaemonFd != -1) { 2277b984e3f7e724f8a3547a707210319f3d479f261Steve Block ALOGD("Sending update msg to dnsmasq [%s]", daemonCmd); 2289d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (write(mDaemonFd, daemonCmd, strlen(daemonCmd) +1) < 0) { 2295ea0c05a1e7d8e664b808aa1bb1efd08fdb2fb13Steve Block ALOGE("Failed to send update command to dnsmasq (%s)", strerror(errno)); 2309d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mDnsForwarders->clear(); 2319d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 2329d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 2339d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 2349d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 2359d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 2369d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2379d10b341a0ba46f108cb96e46691197d778cbc06San MehatNetAddressCollection *TetherController::getDnsForwarders() { 2389d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return mDnsForwarders; 2399d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 2409d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2419d10b341a0ba46f108cb96e46691197d778cbc06San Mehatint TetherController::tetherInterface(const char *interface) { 2429d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mInterfaces->push_back(strdup(interface)); 2439d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 2449d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 2459d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2469d10b341a0ba46f108cb96e46691197d778cbc06San Mehatint TetherController::untetherInterface(const char *interface) { 2479d10b341a0ba46f108cb96e46691197d778cbc06San Mehat InterfaceCollection::iterator it; 2489d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2499d10b341a0ba46f108cb96e46691197d778cbc06San Mehat for (it = mInterfaces->begin(); it != mInterfaces->end(); ++it) { 2509d10b341a0ba46f108cb96e46691197d778cbc06San Mehat if (!strcmp(interface, *it)) { 2519d10b341a0ba46f108cb96e46691197d778cbc06San Mehat free(*it); 2529d10b341a0ba46f108cb96e46691197d778cbc06San Mehat mInterfaces->erase(it); 2539d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return 0; 2549d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 2559d10b341a0ba46f108cb96e46691197d778cbc06San Mehat } 2569d10b341a0ba46f108cb96e46691197d778cbc06San Mehat errno = ENOENT; 2579d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return -1; 2589d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 2599d10b341a0ba46f108cb96e46691197d778cbc06San Mehat 2609d10b341a0ba46f108cb96e46691197d778cbc06San MehatInterfaceCollection *TetherController::getTetheredInterfaceList() { 2619d10b341a0ba46f108cb96e46691197d778cbc06San Mehat return mInterfaces; 2629d10b341a0ba46f108cb96e46691197d778cbc06San Mehat} 263