mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 21:17:52 +00:00
137 lines
3.6 KiB
C++
137 lines
3.6 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2011-2014 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <set>
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#include "IpcListener.hpp"
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#include "IpcConnection.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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#else
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#endif
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namespace ZeroTier {
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IpcListener::IpcListener(const char *ep,void (*commandHandler)(void *,const SharedPtr<IpcConnection> &,const char *),void *arg) :
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_endpoint(ep),
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_handler(commandHandler),
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_arg(arg),
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_sock(0)
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{
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#ifdef __WINDOWS__
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#else
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struct sockaddr_un unaddr;
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unaddr.sun_family = AF_UNIX;
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strncpy(unaddr.sun_path,_endpoint.c_str(),sizeof(unaddr.sun_path));
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unaddr.sun_path[sizeof(unaddr.sun_path) - 1] = (char)0;
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for(int tries=0;tries<3;++tries) {
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_sock = socket(AF_UNIX,SOCK_STREAM,0);
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if (_sock <= 0)
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throw std::runtime_error("unable to create socket of type AF_UNIX");
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if (bind(_sock,(struct sockaddr *)&unaddr,sizeof(unaddr))) {
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::close(_sock);
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if (errno == EADDRINUSE) {
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int testSock = socket(AF_UNIX,SOCK_STREAM,0);
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if (testSock <= 0)
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throw std::runtime_error("unable to create socket of type AF_UNIX");
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if (connect(testSock,(struct sockaddr *)&unaddr,sizeof(unaddr))) {
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// error indicates nothing is listening on other end, so unlink and try again
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::close(testSock);
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unlink(_endpoint.c_str());
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} else {
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// success means endpoint is being actively listened to by a process
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::close(testSock);
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throw std::runtime_error("IPC endpoint address in use");
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}
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} else throw std::runtime_error("IPC endpoint could not be bound");
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}
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}
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if (listen(_sock,8)) {
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::close(_sock);
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throw std::runtime_error("listen() failed for bound AF_UNIX socket");
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}
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#endif
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_thread = Thread::start(this);
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}
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IpcListener::~IpcListener()
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{
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#ifdef __WINDOWS__
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#else
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int s = _sock;
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_sock = 0;
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if (s > 0) {
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::shutdown(s,SHUT_RDWR);
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::close(s);
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}
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Thread::join(_thread);
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unlink(_endpoint.c_str());
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#endif
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}
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void IpcListener::threadMain()
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throw()
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{
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#ifdef __WINDOWS__
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#else
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struct sockaddr_un unaddr;
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socklen_t socklen;
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int s;
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while (_sock > 0) {
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unaddr.sun_family = AF_UNIX;
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strncpy(unaddr.sun_path,_endpoint.c_str(),sizeof(unaddr.sun_path));
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unaddr.sun_path[sizeof(unaddr.sun_path) - 1] = (char)0;
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socklen = sizeof(unaddr);
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s = accept(_sock,(struct sockaddr *)&unaddr,&socklen);
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if (s <= 0)
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break;
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if (!_sock) {
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::close(s);
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break;
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}
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try {
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_handler(_arg,SharedPtr<IpcConnection>(new IpcConnection(s,_handler,_arg)),(const char *)0);
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} catch ( ... ) {} // handlers should not throw
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}
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#endif
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}
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} // namespace ZeroTier
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