4 * The secure anycast tunneling protocol (satp) defines a protocol used
5 * for communication between any combination of unicast and anycast
6 * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
7 * mode and allows tunneling of every ETHER TYPE protocol (e.g.
8 * ethernet, ip, arp ...). satp directly includes cryptography and
9 * message authentication based on the methods used by SRTP. It is
10 * intended to deliver a generic, scaleable and secure solution for
11 * tunneling and relaying of packets of any protocol.
14 * Copyright (C) 2007-2014 Markus Grüneis, Othmar Gsenger, Erwin Nindl,
15 * Christian Pointner <satp@wirdorange.org>
17 * This file is part of Anytun.
19 * Anytun is free software: you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation, either version 3 of the License, or
24 * Anytun is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with Anytun. If not, see <http://www.gnu.org/licenses/>.
32 * In addition, as a special exception, the copyright holders give
33 * permission to link the code of portions of this program with the
34 * OpenSSL library under certain conditions as described in each
35 * individual source file, and distribute linked combinations
37 * You must obey the GNU General Public License in all respects
38 * for all of the code used other than OpenSSL. If you modify
39 * file(s) with this exception, you may extend this exception to your
40 * version of the file(s), but you are not obligated to do so. If you
41 * do not wish to do so, delete this exception statement from your
42 * version. If you delete this exception statement from all source
43 * files in the program, then also delete it here.
47 #ifndef ANYTUN_sysexec_hpp_INCLUDED
48 #define ANYTUN_sysexec_hpp_INCLUDED
50 #include <sys/types.h>
55 #include <sys/select.h>
69 char** dupSysStringArray(T const& array)
72 new_array = static_cast<char**>(malloc((array.size() + 1)*sizeof(char*)));
78 for(typename T::const_iterator it = array.begin(); it != array.end(); ++it) {
79 new_array[i] = strdup(it->c_str());
89 new_array[array.size()] = NULL;
93 void freeSysStringArray(char** array)
99 for(int i=0; array[i] ; ++i) {
106 void SysExec::doExec(StringVector args, StringList env)
109 if(pipe(pipefd) == -1) {
110 cLog.msg(Log::PRIO_ERROR) << "executing script '" << script_ << "' pipe() error: " << AnytunErrno(errno);
116 cLog.msg(Log::PRIO_ERROR) << "executing script '" << script_ << "' fork() error: " << AnytunErrno(errno);
123 // parent exits here, call waitForScript to cleanup up zombie
126 // child code, exec the script
128 for(fd=getdtablesize(); fd>=0; --fd) // close all file descriptors
129 if(fd != pipefd[1]) { close(fd); }
131 fd = open("/dev/null",O_RDWR); // stdin
133 cLog.msg(Log::PRIO_WARNING) << "can't open stdin";
135 if(dup(fd) == -1) { // stdout
136 cLog.msg(Log::PRIO_WARNING) << "can't open stdout";
138 if(dup(fd) == -1) { // stderr
139 cLog.msg(Log::PRIO_WARNING) << "can't open stderr";
143 args.insert(args.begin(), script_);
144 char** argv = dupSysStringArray(args);
145 char** evp = dupSysStringArray(env);
147 execve(script_.c_str(), argv, evp);
148 // if execve returns, an error occurred, but logging doesn't work
149 // because we closed all file descriptors, so just write errno to
150 // pipe and call exit
152 freeSysStringArray(argv);
153 freeSysStringArray(evp);
156 int ret = write(pipefd[1], (void*)(&err), sizeof(err));
157 if(ret != sizeof(errno)) {
163 int SysExec::waitForScript()
166 waitpid(pid_, &status, 0);
170 FD_SET(pipefd_, &rfds);
171 struct timeval tv = { 0 , 0 };
172 if(select(pipefd_+1, &rfds, NULL, NULL, &tv) == 1) {
174 if(read(pipefd_, (void*)(&err), sizeof(err)) >= static_cast<int>(sizeof(err))) {
175 cLog.msg(Log::PRIO_ERROR) << "script '" << script_ << "' exec() error: " << AnytunErrno(err);
184 return_code_ = status;
189 void SysExec::waitAndDestroy(SysExec*& s)
196 if(WIFEXITED(s->return_code_)) {
197 cLog.msg(Log::PRIO_NOTICE) << "script '" << s->script_ << "' returned " << WEXITSTATUS(s->return_code_);
198 } else if(WIFSIGNALED(s->return_code_)) {
199 cLog.msg(Log::PRIO_NOTICE) << "script '" << s->script_ << "' terminated after signal " << WTERMSIG(s->return_code_);
200 } else if(WIFSTOPPED(s->return_code_)) {
201 cLog.msg(Log::PRIO_NOTICE) << "script '" << s->script_ << "' stopped after signal " << WSTOPSIG(s->return_code_);
202 } else if(WIFCONTINUED(s->return_code_)) {
203 cLog.msg(Log::PRIO_NOTICE) << "script '" << s->script_ << "' continued after SIGCONT";
210 #endif // ANYTUN_sysexec_hpp_INCLUDED