2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #include <arpa/inet.h>
22 #include <netinet/in.h>
24 #include <sys/socket.h>
25 #include <sys/types.h>
28 #include <resolv_iface.h>
31 #define LOG_TAG "DnsProxyListener"
35 #include <cutils/log.h>
36 #include <sysutils/SocketClient.h>
38 #include "DnsProxyListener.h"
39 #include "ResponseCode.h"
41 DnsProxyListener::DnsProxyListener() :
42 FrameworkListener("dnsproxyd") {
43 registerCmd(new GetAddrInfoCmd());
44 registerCmd(new GetHostByAddrCmd());
45 registerCmd(new GetHostByNameCmd());
48 DnsProxyListener::GetAddrInfoHandler::~GetAddrInfoHandler() {
55 void DnsProxyListener::GetAddrInfoHandler::start() {
57 pthread_create(&thread, NULL,
58 DnsProxyListener::GetAddrInfoHandler::threadStart, this);
61 void* DnsProxyListener::GetAddrInfoHandler::threadStart(void* obj) {
62 GetAddrInfoHandler* handler = reinterpret_cast<GetAddrInfoHandler*>(obj);
69 // Sends 4 bytes of big-endian length, followed by the data.
70 // Returns true on success.
71 static bool sendLenAndData(SocketClient *c, const int len, const void* data) {
72 uint32_t len_be = htonl(len);
73 return c->sendData(&len_be, 4) == 0 &&
74 (len == 0 || c->sendData(data, len) == 0);
77 // Returns true on success
78 static bool sendhostent(SocketClient *c, struct hostent *hp) {
81 if (hp->h_name != NULL) {
82 success &= sendLenAndData(c, strlen(hp->h_name)+1, hp->h_name);
84 success &= sendLenAndData(c, 0, "") == 0;
87 for (i=0; hp->h_aliases[i] != NULL; i++) {
88 success &= sendLenAndData(c, strlen(hp->h_aliases[i])+1, hp->h_aliases[i]);
90 success &= sendLenAndData(c, 1, ""); // null to indicate we're done
92 uint32_t buf = htonl(hp->h_addrtype);
93 success &= c->sendData(&buf, sizeof(buf)) == 0;
95 buf = htonl(hp->h_length);
96 success &= c->sendData(&buf, sizeof(buf)) == 0;
98 for (i=0; hp->h_addr_list[i] != NULL; i++) {
99 success &= c->sendData(hp->h_addr_list[i], hp->h_length) == 0;
101 success &= sendLenAndData(c, 1, ""); // null to indicate we're done
105 void DnsProxyListener::GetAddrInfoHandler::run() {
107 ALOGD("GetAddrInfoHandler, now for %s / %s / %s", mHost, mService, mIface);
110 char tmp[IF_NAMESIZE + 1];
111 if (mIface == NULL) {
112 _resolv_get_pids_associated_interface(mPid, tmp, sizeof(tmp));
115 struct addrinfo* result = NULL;
116 uint32_t rv = android_getaddrinfoforiface(mHost, mService, mHints, mIface ? mIface : tmp,
119 // getaddrinfo failed
120 mClient->sendBinaryMsg(ResponseCode::DnsProxyOperationFailed, &rv, sizeof(rv));
122 bool success = !mClient->sendCode(ResponseCode::DnsProxyQueryResult);
123 struct addrinfo* ai = result;
124 while (ai && success) {
125 success = sendLenAndData(mClient, sizeof(struct addrinfo), ai)
126 && sendLenAndData(mClient, ai->ai_addrlen, ai->ai_addr)
127 && sendLenAndData(mClient,
128 ai->ai_canonname ? strlen(ai->ai_canonname) + 1 : 0,
132 success = success && sendLenAndData(mClient, 0, "");
134 ALOGW("Error writing DNS result to client");
138 freeaddrinfo(result);
143 DnsProxyListener::GetAddrInfoCmd::GetAddrInfoCmd() :
144 NetdCommand("getaddrinfo") {
147 int DnsProxyListener::GetAddrInfoCmd::runCommand(SocketClient *cli,
148 int argc, char **argv) {
150 for (int i = 0; i < argc; i++) {
151 ALOGD("argv[%i]=%s", i, argv[i]);
156 asprintf( &msg, "Invalid number of arguments to getaddrinfo: %i", argc);
158 cli->sendMsg(ResponseCode::CommandParameterError, msg, false);
163 char* name = argv[1];
164 if (strcmp("^", name) == 0) {
170 char* service = argv[2];
171 if (strcmp("^", service) == 0) {
174 service = strdup(service);
177 char* iface = argv[7];
178 if (strcmp(iface, "^") == 0) {
181 iface = strdup(iface);
184 struct addrinfo* hints = NULL;
185 int ai_flags = atoi(argv[3]);
186 int ai_family = atoi(argv[4]);
187 int ai_socktype = atoi(argv[5]);
188 int ai_protocol = atoi(argv[6]);
189 int pid = atoi(argv[8]);
191 if (ai_flags != -1 || ai_family != -1 ||
192 ai_socktype != -1 || ai_protocol != -1) {
193 hints = (struct addrinfo*) calloc(1, sizeof(struct addrinfo));
194 hints->ai_flags = ai_flags;
195 hints->ai_family = ai_family;
196 hints->ai_socktype = ai_socktype;
197 hints->ai_protocol = ai_protocol;
201 ALOGD("GetAddrInfoHandler for %s / %s / %s / %d",
202 name ? name : "[nullhost]",
203 service ? service : "[nullservice]",
204 iface ? iface : "[nulliface]",
209 DnsProxyListener::GetAddrInfoHandler* handler =
210 new DnsProxyListener::GetAddrInfoHandler(cli, name, service, hints, iface, pid);
216 /*******************************************************
218 *******************************************************/
219 DnsProxyListener::GetHostByNameCmd::GetHostByNameCmd() :
220 NetdCommand("gethostbyname") {
223 int DnsProxyListener::GetHostByNameCmd::runCommand(SocketClient *cli,
224 int argc, char **argv) {
226 for (int i = 0; i < argc; i++) {
227 ALOGD("argv[%i]=%s", i, argv[i]);
232 asprintf(&msg, "Invalid number of arguments to gethostbyname: %i", argc);
234 cli->sendMsg(ResponseCode::CommandParameterError, msg, false);
239 int pid = atoi(argv[1]);
240 char* iface = argv[2];
241 char* name = argv[3];
242 int af = atoi(argv[4]);
244 if (strcmp(iface, "^") == 0) {
247 iface = strdup(iface);
250 if (strcmp(name, "^") == 0) {
257 DnsProxyListener::GetHostByNameHandler* handler =
258 new DnsProxyListener::GetHostByNameHandler(cli, pid, iface, name, af);
264 DnsProxyListener::GetHostByNameHandler::~GetHostByNameHandler() {
269 void DnsProxyListener::GetHostByNameHandler::start() {
271 pthread_create(&thread, NULL,
272 DnsProxyListener::GetHostByNameHandler::threadStart, this);
275 void* DnsProxyListener::GetHostByNameHandler::threadStart(void* obj) {
276 GetHostByNameHandler* handler = reinterpret_cast<GetHostByNameHandler*>(obj);
283 void DnsProxyListener::GetHostByNameHandler::run() {
285 ALOGD("DnsProxyListener::GetHostByNameHandler::run\n");
288 char iface[IF_NAMESIZE + 1];
289 if (mIface == NULL) {
290 _resolv_get_pids_associated_interface(mPid, iface, sizeof(iface));
295 hp = android_gethostbynameforiface(mName, mAf, (mIface == NULL) ? mIface : iface);
298 ALOGD("GetHostByNameHandler::run gethostbyaddr errno: %s hp->h_name = %s, name_len = %d\n",
299 hp ? "success" : strerror(errno),
300 (hp && hp->h_name) ? hp->h_name: "null",
301 (hp && hp->h_name) ? strlen(hp->h_name)+ 1 : 0);
306 success = mClient->sendCode(ResponseCode::DnsProxyQueryResult) == 0;
307 success &= sendhostent(mClient, hp);
309 uint32_t error = h_errno;
310 success = mClient->sendBinaryMsg(ResponseCode::DnsProxyOperationFailed,
311 &error, sizeof(error)) == 0;
315 ALOGW("GetHostByNameHandler: Error writing DNS result to client\n");
321 /*******************************************************
323 *******************************************************/
324 DnsProxyListener::GetHostByAddrCmd::GetHostByAddrCmd() :
325 NetdCommand("gethostbyaddr") {
328 int DnsProxyListener::GetHostByAddrCmd::runCommand(SocketClient *cli,
329 int argc, char **argv) {
331 for (int i = 0; i < argc; i++) {
332 ALOGD("argv[%i]=%s", i, argv[i]);
337 asprintf(&msg, "Invalid number of arguments to gethostbyaddr: %i", argc);
339 cli->sendMsg(ResponseCode::CommandParameterError, msg, false);
344 char* addrStr = argv[1];
345 int addrLen = atoi(argv[2]);
346 int addrFamily = atoi(argv[3]);
347 int pid = atoi(argv[4]);
349 char* iface = argv[5];
350 if (strcmp(iface, "^") == 0) {
353 iface = strdup(iface);
356 void* addr = malloc(sizeof(struct in6_addr));
358 int result = inet_pton(addrFamily, addrStr, addr);
361 asprintf(&msg, "inet_pton(\"%s\") failed %s", addrStr, strerror(errno));
363 cli->sendMsg(ResponseCode::OperationFailed, msg, false);
370 DnsProxyListener::GetHostByAddrHandler* handler =
371 new DnsProxyListener::GetHostByAddrHandler(cli, addr, addrLen, addrFamily, iface ,pid);
377 DnsProxyListener::GetHostByAddrHandler::~GetHostByAddrHandler() {
382 void DnsProxyListener::GetHostByAddrHandler::start() {
384 pthread_create(&thread, NULL,
385 DnsProxyListener::GetHostByAddrHandler::threadStart, this);
388 void* DnsProxyListener::GetHostByAddrHandler::threadStart(void* obj) {
389 GetHostByAddrHandler* handler = reinterpret_cast<GetHostByAddrHandler*>(obj);
396 void DnsProxyListener::GetHostByAddrHandler::run() {
398 ALOGD("DnsProxyListener::GetHostByAddrHandler::run\n");
401 char tmp[IF_NAMESIZE + 1];
402 if (mIface == NULL) {
403 _resolv_get_pids_associated_interface(mPid, tmp, sizeof(tmp));
408 // NOTE gethostbyaddr should take a void* but bionic thinks it should be char*
409 hp = android_gethostbyaddrforiface((char*)mAddress, mAddressLen, mAddressFamily,
410 mIface ? mIface : tmp);
413 ALOGD("GetHostByAddrHandler::run gethostbyaddr errno: %s hp->h_name = %s, name_len = %d\n",
414 hp ? "success" : strerror(errno),
415 (hp && hp->h_name) ? hp->h_name: "null",
416 (hp && hp->h_name) ? strlen(hp->h_name)+ 1 : 0);
421 failed = mClient->sendBinaryMsg(ResponseCode::DnsProxyQueryResult,
422 hp->h_name ? hp->h_name : "",
423 hp->h_name ? strlen(hp->h_name)+ 1 : 0);
425 uint32_t error = h_errno;
426 failed = mClient->sendBinaryMsg(ResponseCode::DnsProxyOperationFailed,
427 &error, sizeof(error));
431 ALOGW("GetHostByAddrHandler: Error writing DNS result to client\n");