mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-24 07:06:39 +00:00
370dd6c4da
(1) Add a bunch of tedious type casts to eliminate unnecessary compiler warnings on Windows X64 builds. (2) Some EthernetTap work to integrate Windows custom IOCTL for multicast group lookup (not done quite yet). (3) Dump some more info in selftest to make sure our Windows path lookup functions are returning sane results.
471 lines
14 KiB
C++
471 lines
14 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include "Constants.hpp"
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#ifdef __WINDOWS__
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#include <WinSock2.h>
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#include <Windows.h>
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#include <winhttp.h>
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#include <locale>
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#include <codecvt>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef __UNIX_LIKE__
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/select.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#endif
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#include <vector>
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#include <utility>
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#include <algorithm>
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#include "HttpClient.hpp"
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#include "Thread.hpp"
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#include "Utils.hpp"
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#include "NonCopyable.hpp"
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#include "Defaults.hpp"
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namespace ZeroTier {
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const std::map<std::string,std::string> HttpClient::NO_HEADERS;
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#ifdef __UNIX_LIKE__
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// The *nix implementation calls 'curl' externally rather than linking to it.
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// This makes it an optional dependency that can be avoided in tiny systems
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// provided you don't want to have automatic software updates... or want to
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// do them via another method.
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#ifdef __APPLE__
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// TODO: get proxy configuration
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#endif
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// Paths where "curl" may be found on the system
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#define NUM_CURL_PATHS 5
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static const char *CURL_PATHS[NUM_CURL_PATHS] = { "/usr/bin/curl","/bin/curl","/usr/local/bin/curl","/usr/sbin/curl","/sbin/curl" };
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// Maximum message length
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#define CURL_MAX_MESSAGE_LENGTH (1024 * 1024 * 64)
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// Internal private thread class that performs request, notifies handler,
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// and then commits suicide by deleting itself.
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class P_Req : NonCopyable
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{
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public:
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P_Req(const char *method,const std::string &url,const std::map<std::string,std::string> &headers,unsigned int timeout,void (*handler)(void *,int,const std::string &,bool,const std::string &),void *arg) :
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_url(url),
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_headers(headers),
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_timeout(timeout),
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_handler(handler),
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_arg(arg)
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{
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_myThread = Thread::start(this);
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}
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void threadMain()
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{
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char *curlArgs[1024];
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char buf[16384];
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fd_set readfds,writefds,errfds;
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struct timeval tv;
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std::string curlPath;
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for(int i=0;i<NUM_CURL_PATHS;++i) {
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if (Utils::fileExists(CURL_PATHS[i])) {
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curlPath = CURL_PATHS[i];
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break;
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}
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}
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if (!curlPath.length()) {
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_handler(_arg,-1,_url,false,"unable to locate 'curl' binary in /usr/bin, /bin, /usr/local/bin, /usr/sbin, or /sbin");
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delete this;
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return;
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}
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if (!_url.length()) {
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_handler(_arg,-1,_url,false,"cannot fetch empty URL");
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delete this;
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return;
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}
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curlArgs[0] = const_cast <char *>(curlPath.c_str());
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curlArgs[1] = const_cast <char *>("-D");
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curlArgs[2] = const_cast <char *>("-"); // append headers before output
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int argPtr = 3;
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std::vector<std::string> headerArgs;
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for(std::map<std::string,std::string>::const_iterator h(_headers.begin());h!=_headers.end();++h) {
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headerArgs.push_back(h->first);
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headerArgs.back().append(": ");
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headerArgs.back().append(h->second);
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}
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for(std::vector<std::string>::iterator h(headerArgs.begin());h!=headerArgs.end();++h) {
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if (argPtr >= (1024 - 4)) // leave room for terminating NULL and URL
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break;
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curlArgs[argPtr++] = const_cast <char *>("-H");
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curlArgs[argPtr++] = const_cast <char *>(h->c_str());
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}
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curlArgs[argPtr++] = const_cast <char *>(_url.c_str());
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curlArgs[argPtr] = (char *)0;
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int curlStdout[2];
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int curlStderr[2];
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::pipe(curlStdout);
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::pipe(curlStderr);
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long pid = (long)vfork();
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if (pid < 0) {
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// fork() failed
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::close(curlStdout[0]);
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::close(curlStdout[1]);
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::close(curlStderr[0]);
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::close(curlStderr[1]);
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_handler(_arg,-1,_url,false,"unable to fork()");
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delete this;
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return;
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} else if (pid > 0) {
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// fork() succeeded, in parent process
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::close(curlStdout[1]);
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::close(curlStderr[1]);
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fcntl(curlStdout[0],F_SETFL,O_NONBLOCK);
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fcntl(curlStderr[0],F_SETFL,O_NONBLOCK);
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int exitCode = -1;
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unsigned long long timesOutAt = Utils::now() + ((unsigned long long)_timeout * 1000ULL);
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bool timedOut = false;
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bool tooLong = false;
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for(;;) {
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FD_ZERO(&readfds);
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FD_ZERO(&writefds);
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FD_ZERO(&errfds);
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FD_SET(curlStdout[0],&readfds);
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FD_SET(curlStderr[0],&readfds);
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FD_SET(curlStdout[0],&errfds);
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FD_SET(curlStderr[0],&errfds);
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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select(std::max(curlStdout[0],curlStderr[0])+1,&readfds,&writefds,&errfds,&tv);
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if (FD_ISSET(curlStdout[0],&readfds)) {
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int n = (int)::read(curlStdout[0],buf,sizeof(buf));
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if (n > 0) {
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_body.append(buf,n);
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// Reset timeout when data is read...
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timesOutAt = Utils::now() + ((unsigned long long)_timeout * 1000ULL);
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} else if (n < 0)
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break;
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if (_body.length() > CURL_MAX_MESSAGE_LENGTH) {
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::kill(pid,SIGKILL);
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tooLong = true;
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break;
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}
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}
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if (FD_ISSET(curlStderr[0],&readfds))
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::read(curlStderr[0],buf,sizeof(buf));
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if (FD_ISSET(curlStdout[0],&errfds)||FD_ISSET(curlStderr[0],&errfds))
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break;
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if (Utils::now() >= timesOutAt) {
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::kill(pid,SIGKILL);
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timedOut = true;
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break;
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}
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if (waitpid(pid,&exitCode,WNOHANG) > 0) {
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for(;;) {
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// Drain output...
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int n = (int)::read(curlStdout[0],buf,sizeof(buf));
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if (n <= 0)
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break;
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else {
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_body.append(buf,n);
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if (_body.length() > CURL_MAX_MESSAGE_LENGTH) {
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tooLong = true;
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break;
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}
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}
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}
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pid = 0;
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break;
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}
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}
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if (pid > 0)
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waitpid(pid,&exitCode,0);
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::close(curlStdout[0]);
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::close(curlStderr[0]);
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if (timedOut)
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_handler(_arg,-1,_url,false,"connection timed out");
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else if (tooLong)
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_handler(_arg,-1,_url,false,"response too long");
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else if (exitCode)
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_handler(_arg,-1,_url,false,"connection failed (curl returned non-zero exit code)");
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else {
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unsigned long idx = 0;
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// Grab status line and headers, which will prefix output on
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// success and will end with an empty line.
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std::vector<std::string> headers;
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headers.push_back(std::string());
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while (idx < _body.length()) {
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char c = _body[idx++];
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if (c == '\n') {
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if (!headers.back().length()) {
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headers.pop_back();
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break;
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} else headers.push_back(std::string());
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} else if (c != '\r')
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headers.back().push_back(c);
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}
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if (headers.empty()||(!headers.front().length())) {
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_handler(_arg,-1,_url,false,"HTTP response empty");
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delete this;
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return;
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}
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// Parse first line -- HTTP status code and response
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size_t scPos = headers.front().find(' ');
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if (scPos == std::string::npos) {
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_handler(_arg,-1,_url,false,"invalid HTTP response (no status line)");
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delete this;
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return;
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}
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++scPos;
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unsigned int rcode = Utils::strToUInt(headers.front().substr(scPos,3).c_str());
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if ((!rcode)||(rcode > 999)) {
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_handler(_arg,-1,_url,false,"invalid HTTP response (invalid response code)");
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delete this;
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return;
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}
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// Serve up the resulting data to the handler
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if (rcode == 200)
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_handler(_arg,rcode,_url,false,_body.substr(idx));
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else if ((scPos + 4) < headers.front().length())
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_handler(_arg,rcode,_url,false,headers.front().substr(scPos+4));
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else _handler(_arg,rcode,_url,false,"(no status message from server)");
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}
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delete this;
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return;
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} else {
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// fork() succeeded, in child process
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::dup2(curlStdout[1],STDOUT_FILENO);
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::close(curlStdout[1]);
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::dup2(curlStderr[1],STDERR_FILENO);
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::close(curlStderr[1]);
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::execv(curlPath.c_str(),curlArgs);
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::exit(-1); // only reached if execv() fails
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}
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}
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const std::string _url;
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std::string _body;
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std::map<std::string,std::string> _headers;
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unsigned int _timeout;
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void (*_handler)(void *,int,const std::string &,bool,const std::string &);
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void *_arg;
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Thread _myThread;
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};
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HttpClient::Request HttpClient::_do(
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const char *method,
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const std::string &url,
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const std::map<std::string,std::string> &headers,
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unsigned int timeout,
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void (*handler)(void *,int,const std::string &,bool,const std::string &),
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void *arg)
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{
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return (HttpClient::Request)(new P_Req(method,url,headers,timeout,handler,arg));
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}
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#endif
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#ifdef __WINDOWS__
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#define WIN_MAX_MESSAGE_LENGTH (1024 * 1024 * 64)
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// Internal private thread class that performs request, notifies handler,
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// and then commits suicide by deleting itself.
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class P_Req : NonCopyable
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{
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public:
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P_Req(const char *method,const std::string &url,const std::map<std::string,std::string> &headers,unsigned int timeout,void (*handler)(void *,int,const std::string &,bool,const std::string &),void *arg) :
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_url(url),
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_headers(headers),
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_timeout(timeout),
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_handler(handler),
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_arg(arg)
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{
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_myThread = Thread::start(this);
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}
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void threadMain()
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{
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HINTERNET hSession = (HINTERNET)0;
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HINTERNET hConnect = (HINTERNET)0;
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HINTERNET hRequest = (HINTERNET)0;
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try {
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hSession = WinHttpOpen(L"ZeroTier One HttpClient/1.0",WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,WINHTTP_NO_PROXY_NAME,WINHTTP_NO_PROXY_BYPASS,0);
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if (!hSession) {
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_handler(_arg,-1,_url,false,"WinHttpOpen() failed");
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goto closeAndReturnFromHttp;
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}
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int timeoutMs = (int)_timeout * 1000;
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WinHttpSetTimeouts(hSession,timeoutMs,timeoutMs,timeoutMs,timeoutMs);
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std::wstring_convert< std::codecvt_utf8<wchar_t> > wcconv;
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std::wstring wurl(wcconv.from_bytes(_url));
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URL_COMPONENTS uc;
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memset(&uc,0,sizeof(uc));
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uc.dwStructSize = sizeof(uc);
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uc.dwSchemeLength = -1;
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uc.dwHostNameLength = -1;
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uc.dwUrlPathLength = -1;
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uc.dwExtraInfoLength = -1;
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if (!WinHttpCrackUrl(wurl.c_str(),(DWORD)wurl.length(),0,&uc)) {
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_handler(_arg,-1,_url,false,"unable to parse URL: WinHttpCrackUrl() failed");
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goto closeAndReturnFromHttp;
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}
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if ((!uc.lpszHostName)||(!uc.lpszUrlPath)||(!uc.lpszScheme)||(uc.dwHostNameLength <= 0)||(uc.dwUrlPathLength <= 0)||(uc.dwSchemeLength <= 0)) {
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_handler(_arg,-1,_url,false,"unable to parse URL: missing scheme, host name, or path");
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goto closeAndReturnFromHttp;
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}
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std::wstring urlScheme(uc.lpszScheme,uc.dwSchemeLength);
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std::wstring urlHostName(uc.lpszHostName,uc.dwHostNameLength);
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std::wstring urlPath(uc.lpszUrlPath,uc.dwUrlPathLength);
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if ((uc.lpszExtraInfo)&&(uc.dwExtraInfoLength > 0))
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urlPath.append(uc.lpszExtraInfo,uc.dwExtraInfoLength);
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if (urlScheme != L"http") {
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_handler(_arg,-1,_url,false,"only 'http' scheme is supported");
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goto closeAndReturnFromHttp;
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}
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hConnect = WinHttpConnect(hSession,urlHostName.c_str(),((uc.nPort > 0) ? uc.nPort : 80),0);
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if (!hConnect) {
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_handler(_arg,-1,_url,false,"connection failed");
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goto closeAndReturnFromHttp;
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}
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hRequest = WinHttpOpenRequest(hConnect,L"GET",urlPath.c_str(),NULL,WINHTTP_NO_REFERER,WINHTTP_DEFAULT_ACCEPT_TYPES,0);
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if (!hRequest) {
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_handler(_arg,-1,_url,false,"error sending request (1)");
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goto closeAndReturnFromHttp;
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}
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if (!WinHttpSendRequest(hRequest,WINHTTP_NO_ADDITIONAL_HEADERS,0,WINHTTP_NO_REQUEST_DATA,0,0,0)) {
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_handler(_arg,-1,_url,false,"error sending request (2)");
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goto closeAndReturnFromHttp;
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}
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if (WinHttpReceiveResponse(hRequest,NULL)) {
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DWORD dwStatusCode = 0;
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DWORD dwTmp = sizeof(dwStatusCode);
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WinHttpQueryHeaders(hRequest,WINHTTP_QUERY_STATUS_CODE| WINHTTP_QUERY_FLAG_NUMBER,NULL,&dwStatusCode,&dwTmp,NULL);
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DWORD dwSize;
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do {
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dwSize = 0;
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if (!WinHttpQueryDataAvailable(hRequest,&dwSize)) {
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_handler(_arg,-1,_url,false,"receive error (1)");
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goto closeAndReturnFromHttp;
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}
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char *outBuffer = new char[dwSize];
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DWORD dwRead = 0;
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if (!WinHttpReadData(hRequest,(LPVOID)outBuffer,dwSize,&dwRead)) {
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_handler(_arg,-1,_url,false,"receive error (2)");
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goto closeAndReturnFromHttp;
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}
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_body.append(outBuffer,dwRead);
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delete [] outBuffer;
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if (_body.length() > WIN_MAX_MESSAGE_LENGTH) {
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_handler(_arg,-1,_url,false,"result too large");
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goto closeAndReturnFromHttp;
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}
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} while (dwSize > 0);
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_handler(_arg,dwStatusCode,_url,false,_body);
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} else {
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_handler(_arg,-1,_url,false,"receive response failed");
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}
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} catch (std::bad_alloc &exc) {
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_handler(_arg,-1,_url,false,"insufficient memory");
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} catch ( ... ) {
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_handler(_arg,-1,_url,false,"unexpected exception");
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}
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closeAndReturnFromHttp:
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if (hRequest)
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WinHttpCloseHandle(hRequest);
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if (hConnect)
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WinHttpCloseHandle(hConnect);
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if (hSession)
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WinHttpCloseHandle(hSession);
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delete this;
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return;
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}
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const std::string _url;
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std::string _body;
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std::map<std::string,std::string> _headers;
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unsigned int _timeout;
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void (*_handler)(void *,int,const std::string &,bool,const std::string &);
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void *_arg;
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Thread _myThread;
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};
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HttpClient::Request HttpClient::_do(
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const char *method,
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const std::string &url,
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const std::map<std::string,std::string> &headers,
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unsigned int timeout,
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void (*handler)(void *,int,const std::string &,bool,const std::string &),
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void *arg)
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{
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return (HttpClient::Request)(new P_Req(method,url,headers,timeout,handler,arg));
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}
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#endif
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} // namespace ZeroTier
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