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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "ResolverController"
     18 #define DBG 0
     19 
     20 #include <cutils/log.h>
     21 
     22 #include <net/if.h>
     23 
     24 // NOTE: <resolv_iface.h> is a private C library header that provides
     25 //       declarations for _resolv_set_default_iface() and others.
     26 #include <resolv_iface.h>
     27 
     28 #include "ResolverController.h"
     29 
     30 int ResolverController::setDefaultInterface(const char* iface) {
     31     if (DBG) {
     32         ALOGD("setDefaultInterface iface = %s\n", iface);
     33     }
     34 
     35     _resolv_set_default_iface(iface);
     36 
     37     return 0;
     38 }
     39 
     40 int ResolverController::setInterfaceDnsServers(const char* iface, const char* domains,
     41         const char** servers, int numservers) {
     42     if (DBG) {
     43         ALOGD("setInterfaceDnsServers iface = %s\n", iface);
     44     }
     45     _resolv_set_nameservers_for_iface(iface, servers, numservers, domains);
     46 
     47     return 0;
     48 }
     49 
     50 int ResolverController::setInterfaceAddress(const char* iface, struct in_addr* addr) {
     51     if (DBG) {
     52         ALOGD("setInterfaceAddress iface = %s\n", iface);
     53     }
     54 
     55     _resolv_set_addr_of_iface(iface, addr);
     56 
     57     return 0;
     58 }
     59 
     60 int ResolverController::flushDefaultDnsCache() {
     61     if (DBG) {
     62         ALOGD("flushDefaultDnsCache\n");
     63     }
     64 
     65     _resolv_flush_cache_for_default_iface();
     66 
     67     return 0;
     68 }
     69 
     70 int ResolverController::flushInterfaceDnsCache(const char* iface) {
     71     if (DBG) {
     72         ALOGD("flushInterfaceDnsCache iface = %s\n", iface);
     73     }
     74 
     75     _resolv_flush_cache_for_iface(iface);
     76 
     77     return 0;
     78 }
     79 
     80 int ResolverController::setDnsInterfaceForPid(const char* iface, int pid) {
     81     if (DBG) {
     82         ALOGD("setDnsIfaceForPid iface = %s, pid = %d\n", iface, pid);
     83     }
     84 
     85     _resolv_set_iface_for_pid(iface, pid);
     86 
     87     return 0;
     88 }
     89 
     90 int ResolverController::clearDnsInterfaceForPid(int pid) {
     91     if (DBG) {
     92         ALOGD("clearDnsIfaceForPid pid = %d\n", pid);
     93     }
     94 
     95     _resolv_clear_iface_for_pid(pid);
     96 
     97     return 0;
     98 }
     99 
    100 int ResolverController::setDnsInterfaceForUidRange(const char* iface, int uid_start, int uid_end) {
    101     if (DBG) {
    102         ALOGD("setDnsIfaceForUidRange iface = %s, range = [%d,%d]\n", iface, uid_start, uid_end);
    103     }
    104 
    105     return _resolv_set_iface_for_uid_range(iface, uid_start, uid_end);
    106 }
    107 
    108 int ResolverController::clearDnsInterfaceForUidRange(int uid_start, int uid_end) {
    109     if (DBG) {
    110         ALOGD("clearDnsIfaceForUidRange range = [%d,%d]\n", uid_start, uid_end);
    111     }
    112 
    113     return _resolv_clear_iface_for_uid_range(uid_start, uid_end);
    114 }
    115 
    116 int ResolverController::clearDnsInterfaceMappings()
    117 {
    118     if (DBG) {
    119         ALOGD("clearInterfaceMappings\n");
    120     }
    121     _resolv_clear_iface_uid_range_mapping();
    122     _resolv_clear_iface_pid_mapping();
    123 
    124     return 0;
    125 }
    126