1ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh/* 2ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * Copyright (C) 2011 The Android Open Source Project 3ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * 4ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * Licensed under the Apache License, Version 2.0 (the "License"); 5ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * you may not use this file except in compliance with the License. 6ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * You may obtain a copy of the License at 7ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * 8ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * http://www.apache.org/licenses/LICENSE-2.0 9ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * 10ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * Unless required by applicable law or agreed to in writing, software 11ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * distributed under the License is distributed on an "AS IS" BASIS, 12ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * See the License for the specific language governing permissions and 14ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh * limitations under the License. 15ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh */ 16ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 17ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#define LOG_NDEBUG 0 18ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 19ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#define LOG_TAG "VpnJni" 20ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <cutils/log.h> 21f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran#include "netutils/ifc.h" 22ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 23ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <stdio.h> 24ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <string.h> 25ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <sys/ioctl.h> 26ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <sys/types.h> 27ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <sys/stat.h> 28ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <sys/socket.h> 29ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <netinet/in.h> 30ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <arpa/inet.h> 31ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <errno.h> 32ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <fcntl.h> 33ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 34ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <linux/if.h> 35ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <linux/if_tun.h> 36ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <linux/route.h> 37ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include <linux/ipv6_route.h> 38ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 39ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include "jni.h" 40ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#include "JNIHelp.h" 41ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 42ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehnamespace android 43ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 44ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 45f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yehstatic int inet4 = -1; 46f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yehstatic int inet6 = -1; 47f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh 48ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehstatic inline in_addr_t *as_in_addr(sockaddr *sa) { 49ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return &((sockaddr_in *)sa)->sin_addr.s_addr; 50ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 51ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 52ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh//------------------------------------------------------------------------------ 53ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 54ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#define SYSTEM_ERROR -1 55ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh#define BAD_ARGUMENT -2 56ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 5797a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic int create_interface(int mtu) 58ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 59f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh int tun = open("/dev/tun", O_RDWR | O_NONBLOCK); 60ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 61ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ifreq ifr4; 62ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh memset(&ifr4, 0, sizeof(ifr4)); 63ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 64ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh // Allocate interface. 656224b5ec3857d78e92bbc21075717eaa228ff891Chia-chi Yeh ifr4.ifr_flags = IFF_TUN | IFF_NO_PI; 66ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(tun, TUNSETIFF, &ifr4)) { 673762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot allocate TUN: %s", strerror(errno)); 68ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh goto error; 69ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 70ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 71ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh // Activate interface. 72ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ifr4.ifr_flags = IFF_UP; 73ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(inet4, SIOCSIFFLAGS, &ifr4)) { 743762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot activate %s: %s", ifr4.ifr_name, strerror(errno)); 75ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh goto error; 76ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 77ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 783663227a8be5c6c05bf4adadc378fd69b7ae814cChia-chi Yeh // Set MTU if it is specified. 793663227a8be5c6c05bf4adadc378fd69b7ae814cChia-chi Yeh ifr4.ifr_mtu = mtu; 803663227a8be5c6c05bf4adadc378fd69b7ae814cChia-chi Yeh if (mtu > 0 && ioctl(inet4, SIOCSIFMTU, &ifr4)) { 813762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot set MTU on %s: %s", ifr4.ifr_name, strerror(errno)); 823663227a8be5c6c05bf4adadc378fd69b7ae814cChia-chi Yeh goto error; 833663227a8be5c6c05bf4adadc378fd69b7ae814cChia-chi Yeh } 843663227a8be5c6c05bf4adadc378fd69b7ae814cChia-chi Yeh 85ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return tun; 86ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 87ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeherror: 88ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh close(tun); 89ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return SYSTEM_ERROR; 90ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 91ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 9297a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic int get_interface_name(char *name, int tun) 9397a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh{ 9497a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh ifreq ifr4; 9597a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (ioctl(tun, TUNGETIFF, &ifr4)) { 963762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot get interface name: %s", strerror(errno)); 9797a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return SYSTEM_ERROR; 9897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 9997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh strncpy(name, ifr4.ifr_name, IFNAMSIZ); 10097a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return 0; 10197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh} 10297a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh 10397a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic int get_interface_index(const char *name) 104f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh{ 105f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh ifreq ifr4; 10697a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh strncpy(ifr4.ifr_name, name, IFNAMSIZ); 10797a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (ioctl(inet4, SIOGIFINDEX, &ifr4)) { 1083762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot get index of %s: %s", name, strerror(errno)); 10997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return SYSTEM_ERROR; 11097a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 11197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return ifr4.ifr_ifindex; 11297a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh} 11397a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh 11497a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic int set_addresses(const char *name, const char *addresses) 11597a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh{ 11697a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh int index = get_interface_index(name); 11797a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (index < 0) { 11897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return index; 11997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 12097a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh 12197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh ifreq ifr4; 122ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh memset(&ifr4, 0, sizeof(ifr4)); 123f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh strncpy(ifr4.ifr_name, name, IFNAMSIZ); 12436673698078cb47e777418cadc4115a65bc5947dChia-chi Yeh ifr4.ifr_addr.sa_family = AF_INET; 12597a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh ifr4.ifr_netmask.sa_family = AF_INET; 126ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 127ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh in6_ifreq ifr6; 128ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh memset(&ifr6, 0, sizeof(ifr6)); 129ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ifr6.ifr6_ifindex = index; 130ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 131ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh char address[65]; 132ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh int prefix; 133ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh int chars; 134ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh int count = 0; 135ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 136ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh while (sscanf(addresses, " %64[^/]/%d %n", address, &prefix, &chars) == 2) { 137ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh addresses += chars; 138ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 139ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (strchr(address, ':')) { 140ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh // Add an IPv6 address. 141ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (inet_pton(AF_INET6, address, &ifr6.ifr6_addr) != 1 || 142ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh prefix < 0 || prefix > 128) { 143ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh count = BAD_ARGUMENT; 144ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh break; 145ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 146ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 147ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ifr6.ifr6_prefixlen = prefix; 148ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(inet6, SIOCSIFADDR, &ifr6)) { 149ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR; 150ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh break; 151ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 152ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } else { 153ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh // Add an IPv4 address. 154ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (inet_pton(AF_INET, address, as_in_addr(&ifr4.ifr_addr)) != 1 || 155ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh prefix < 0 || prefix > 32) { 156ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh count = BAD_ARGUMENT; 157ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh break; 158ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 159ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 160ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (count) { 161ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh sprintf(ifr4.ifr_name, "%s:%d", name, count); 162ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 163ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(inet4, SIOCSIFADDR, &ifr4)) { 164ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR; 165ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh break; 166ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 167ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 168ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh in_addr_t mask = prefix ? (~0 << (32 - prefix)) : 0; 16997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh *as_in_addr(&ifr4.ifr_netmask) = htonl(mask); 170ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(inet4, SIOCSIFNETMASK, &ifr4)) { 171ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh count = (errno == EINVAL) ? BAD_ARGUMENT : SYSTEM_ERROR; 172ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh break; 173ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 174ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 1755baa3a62a97544669fba6d65a11c07f252e654ddSteve Block ALOGD("Address added on %s: %s/%d", name, address, prefix); 176ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ++count; 177ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 178ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 179ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (count == BAD_ARGUMENT) { 1803762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Invalid address: %s/%d", address, prefix); 181ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } else if (count == SYSTEM_ERROR) { 1823762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot add address: %s/%d: %s", address, prefix, strerror(errno)); 183ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } else if (*addresses) { 1843762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Invalid address: %s", addresses); 185ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh count = BAD_ARGUMENT; 186ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 187ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 188ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return count; 189ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 190ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 191ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehstatic int reset_interface(const char *name) 192ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 193ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ifreq ifr4; 194ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh strncpy(ifr4.ifr_name, name, IFNAMSIZ); 195f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh ifr4.ifr_flags = 0; 196ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 197ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(inet4, SIOCSIFFLAGS, &ifr4) && errno != ENODEV) { 1983762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot reset %s: %s", name, strerror(errno)); 199ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return SYSTEM_ERROR; 200ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 201ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return 0; 202ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 203ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 204ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehstatic int check_interface(const char *name) 205ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 206ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh ifreq ifr4; 207ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh strncpy(ifr4.ifr_name, name, IFNAMSIZ); 2086ddd57491a06da3ee56056b088424500c144063aChia-chi Yeh ifr4.ifr_flags = 0; 209ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 210ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (ioctl(inet4, SIOCGIFFLAGS, &ifr4) && errno != ENODEV) { 2113762c311729fe9f3af085c14c5c1fb471d994c03Steve Block ALOGE("Cannot check %s: %s", name, strerror(errno)); 212ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 213ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return ifr4.ifr_flags; 214ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 215ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 216f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandranstatic bool modifyAddress(JNIEnv *env, jobject thiz, jstring jName, jstring jAddress, 217f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran jint jPrefixLength, bool add) 218f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran{ 219f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran int error = SYSTEM_ERROR; 220f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran const char *name = jName ? env->GetStringUTFChars(jName, NULL) : NULL; 221f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran const char *address = jAddress ? env->GetStringUTFChars(jAddress, NULL) : NULL; 222f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran 223f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran if (!name) { 224f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran jniThrowNullPointerException(env, "name"); 225f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } else if (!address) { 226f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran jniThrowNullPointerException(env, "address"); 227f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } else { 228f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran if (add) { 229f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran if (error = ifc_add_address(name, address, jPrefixLength)) { 230f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran ALOGE("Cannot add address %s/%d on interface %s (%s)", address, jPrefixLength, name, 231f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran strerror(-error)); 232f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } 233f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } else { 234f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran if (error = ifc_del_address(name, address, jPrefixLength)) { 235f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran ALOGE("Cannot del address %s/%d on interface %s (%s)", address, jPrefixLength, name, 236f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran strerror(-error)); 237f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } 238f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } 239f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } 240f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran 241f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran if (name) { 242f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran env->ReleaseStringUTFChars(jName, name); 243f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } 244f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran if (address) { 245f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran env->ReleaseStringUTFChars(jAddress, address); 246f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran } 247f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran return !error; 248f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran} 249f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran 250ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh//------------------------------------------------------------------------------ 251ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 252ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehstatic void throwException(JNIEnv *env, int error, const char *message) 253ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 254ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (error == SYSTEM_ERROR) { 255ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh jniThrowException(env, "java/lang/IllegalStateException", message); 256ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } else { 257ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh jniThrowException(env, "java/lang/IllegalArgumentException", message); 258ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 259ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 260ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 26197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic jint create(JNIEnv *env, jobject thiz, jint mtu) 262ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 26397a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh int tun = create_interface(mtu); 264ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (tun < 0) { 265ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh throwException(env, tun, "Cannot create interface"); 26636673698078cb47e777418cadc4115a65bc5947dChia-chi Yeh return -1; 267ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 26897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return tun; 26997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh} 270ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 27197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic jstring getName(JNIEnv *env, jobject thiz, jint tun) 27297a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh{ 27397a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh char name[IFNAMSIZ]; 27497a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (get_interface_name(name, tun) < 0) { 27597a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh throwException(env, SYSTEM_ERROR, "Cannot get interface name"); 27697a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return NULL; 27797a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 27897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return env->NewStringUTF(name); 27997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh} 28097a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh 28197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yehstatic jint setAddresses(JNIEnv *env, jobject thiz, jstring jName, 28297a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh jstring jAddresses) 28397a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh{ 28497a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh const char *name = NULL; 285f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh const char *addresses = NULL; 28697a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh int count = -1; 287f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh 28897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh name = jName ? env->GetStringUTFChars(jName, NULL) : NULL; 28997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (!name) { 29097a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh jniThrowNullPointerException(env, "name"); 29197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh goto error; 29297a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 293ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh addresses = jAddresses ? env->GetStringUTFChars(jAddresses, NULL) : NULL; 294ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (!addresses) { 29597a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh jniThrowNullPointerException(env, "addresses"); 296ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh goto error; 297ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 29897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh count = set_addresses(name, addresses); 29997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (count < 0) { 300ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh throwException(env, count, "Cannot set address"); 30197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh count = -1; 302ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 3033281034c1c458b4eecd867d20b64dc5edd68ec14Chia-chi Yeh 304f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeherror: 30597a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (name) { 30697a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh env->ReleaseStringUTFChars(jName, name); 30797a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 30897a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh if (addresses) { 30997a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh env->ReleaseStringUTFChars(jAddresses, addresses); 31097a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh } 31197a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh return count; 3123281034c1c458b4eecd867d20b64dc5edd68ec14Chia-chi Yeh} 3133281034c1c458b4eecd867d20b64dc5edd68ec14Chia-chi Yeh 314c2b8aa0b4c822b0e307f62131650f4a6ee89bb66Chia-chi Yehstatic void reset(JNIEnv *env, jobject thiz, jstring jName) 315ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 316f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh const char *name = jName ? env->GetStringUTFChars(jName, NULL) : NULL; 317ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (!name) { 318ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh jniThrowNullPointerException(env, "name"); 319ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return; 320ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 321ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (reset_interface(name) < 0) { 322ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh throwException(env, SYSTEM_ERROR, "Cannot reset interface"); 323ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 324ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh env->ReleaseStringUTFChars(jName, name); 325ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 326ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 327c2b8aa0b4c822b0e307f62131650f4a6ee89bb66Chia-chi Yehstatic jint check(JNIEnv *env, jobject thiz, jstring jName) 328ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 329f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh const char *name = jName ? env->GetStringUTFChars(jName, NULL) : NULL; 330ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh if (!name) { 331ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh jniThrowNullPointerException(env, "name"); 332ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return 0; 333ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh } 334ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh int flags = check_interface(name); 335ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh env->ReleaseStringUTFChars(jName, name); 336ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return flags; 337ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 338ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 339f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandranstatic bool addAddress(JNIEnv *env, jobject thiz, jstring jName, jstring jAddress, 340f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran jint jPrefixLength) 341f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran{ 342f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran return modifyAddress(env, thiz, jName, jAddress, jPrefixLength, true); 343f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran} 344f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran 345f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandranstatic bool delAddress(JNIEnv *env, jobject thiz, jstring jName, jstring jAddress, 346f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran jint jPrefixLength) 347f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran{ 348f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran return modifyAddress(env, thiz, jName, jAddress, jPrefixLength, false); 349f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran} 350f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran 351ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh//------------------------------------------------------------------------------ 352ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 353ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehstatic JNINativeMethod gMethods[] = { 35497a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh {"jniCreate", "(I)I", (void *)create}, 355c2b8aa0b4c822b0e307f62131650f4a6ee89bb66Chia-chi Yeh {"jniGetName", "(I)Ljava/lang/String;", (void *)getName}, 35697a61565ea95472e65899070e64853f8c147bb11Chia-chi Yeh {"jniSetAddresses", "(Ljava/lang/String;Ljava/lang/String;)I", (void *)setAddresses}, 357c2b8aa0b4c822b0e307f62131650f4a6ee89bb66Chia-chi Yeh {"jniReset", "(Ljava/lang/String;)V", (void *)reset}, 358c2b8aa0b4c822b0e307f62131650f4a6ee89bb66Chia-chi Yeh {"jniCheck", "(Ljava/lang/String;)I", (void *)check}, 359f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran {"jniAddAddress", "(Ljava/lang/String;Ljava/lang/String;I)Z", (void *)addAddress}, 360f4e0c0cb8ef22fdb20ae74b444c9f4b7d15ded8bSreeram Ramachandran {"jniDelAddress", "(Ljava/lang/String;Ljava/lang/String;I)Z", (void *)delAddress}, 361ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh}; 362ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 363ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yehint register_android_server_connectivity_Vpn(JNIEnv *env) 364ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh{ 365f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh if (inet4 == -1) { 366f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh inet4 = socket(AF_INET, SOCK_DGRAM, 0); 367f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh } 368f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh if (inet6 == -1) { 369f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh inet6 = socket(AF_INET6, SOCK_DGRAM, 0); 370f4e3bf892e593d8c74290739446ac205fe8c66b2Chia-chi Yeh } 371ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh return jniRegisterNativeMethods(env, "com/android/server/connectivity/Vpn", 372ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh gMethods, NELEM(gMethods)); 373ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh} 374ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh 375ff3bdca31f4cf2bd607519b276dd175763aa1784Chia-chi Yeh}; 376