mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-04-28 18:03:46 +02:00
429 lines
10 KiB
C++
429 lines
10 KiB
C++
/*
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* Copyright (c)2013-2020 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2024-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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/****/
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#include "../node/Constants.hpp"
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#include "../node/Utils.hpp"
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#include "OSUtils.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 <Shlwapi.h>
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#else
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#include <dirent.h>
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#include <fcntl.h>
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#endif
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#ifdef __GCC__
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#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
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#endif
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namespace ZeroTier {
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#ifdef __APPLE__
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static clock_serv_t _machGetRealtimeClock() noexcept
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{
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clock_serv_t c;
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host_get_clock_service(mach_host_self(),CALENDAR_CLOCK,&c);
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return c;
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}
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clock_serv_t OSUtils::s_machRealtimeClock = _machGetRealtimeClock();
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#endif
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unsigned int OSUtils::ztsnprintf(char *buf,unsigned int len,const char *fmt,...)
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{
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va_list ap;
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va_start(ap,fmt);
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int n = (int)vsnprintf(buf,len,fmt,ap);
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va_end(ap);
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if ((n >= (int)len)||(n < 0)) {
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if (len)
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buf[len - 1] = (char)0;
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throw std::length_error("buf[] overflow");
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}
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return (unsigned int)n;
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}
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#ifdef __UNIX_LIKE__
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bool OSUtils::redirectUnixOutputs(const char *stdoutPath,const char *stderrPath)
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{
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int fdout = open(stdoutPath,O_WRONLY|O_CREAT,0600);
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if (fdout > 0) {
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int fderr;
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if (stderrPath) {
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fderr = open(stderrPath,O_WRONLY|O_CREAT,0600);
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if (fderr <= 0) {
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::close(fdout);
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return false;
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}
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} else fderr = fdout;
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::close(STDOUT_FILENO);
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::close(STDERR_FILENO);
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::dup2(fdout,STDOUT_FILENO);
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::dup2(fderr,STDERR_FILENO);
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return true;
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}
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return false;
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}
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#endif // __UNIX_LIKE__
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std::vector<std::string> OSUtils::listDirectory(const char *path,bool includeDirectories)
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{
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std::vector<std::string> r;
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#ifdef __WINDOWS__
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HANDLE hFind;
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WIN32_FIND_DATAA ffd;
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if ((hFind = FindFirstFileA((std::string(path) + "\\*").c_str(),&ffd)) != INVALID_HANDLE_VALUE) {
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do {
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if ( (strcmp(ffd.cFileName,".")) && (strcmp(ffd.cFileName,"..")) && (((ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)||(((ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0)&&(includeDirectories))) )
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r.push_back(std::string(ffd.cFileName));
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} while (FindNextFileA(hFind,&ffd));
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FindClose(hFind);
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}
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#else
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dirent de;
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dirent *dptr;
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DIR *d = opendir(path);
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if (!d)
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return r;
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dptr = (struct dirent *)0;
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for(;;) {
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if (readdir_r(d,&de,&dptr))
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break;
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if (dptr) {
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if ((strcmp(dptr->d_name,".") != 0)&&(strcmp(dptr->d_name,"..") != 0)&&((dptr->d_type != DT_DIR)||(includeDirectories)))
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r.push_back(std::string(dptr->d_name));
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} else break;
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}
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closedir(d);
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#endif
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return r;
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}
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bool OSUtils::rmDashRf(const char *path)
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{
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#ifdef __WINDOWS__
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HANDLE hFind;
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WIN32_FIND_DATAA ffd;
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if ((hFind = FindFirstFileA((std::string(path) + "\\*").c_str(),&ffd)) != INVALID_HANDLE_VALUE) {
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do {
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if ((strcmp(ffd.cFileName,".") != 0)&&(strcmp(ffd.cFileName,"..") != 0)) {
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if ((ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0) {
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if (DeleteFileA((std::string(path) + ZT_PATH_SEPARATOR_S + ffd.cFileName).c_str()) == FALSE)
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return false;
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} else {
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if (!rmDashRf((std::string(path) + ZT_PATH_SEPARATOR_S + ffd.cFileName).c_str()))
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return false;
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}
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}
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} while (FindNextFileA(hFind,&ffd));
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FindClose(hFind);
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}
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return (RemoveDirectoryA(path) != FALSE);
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#else
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dirent de;
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dirent *dptr;
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DIR *d = opendir(path);
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if (!d)
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return true;
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dptr = (struct dirent *)0;
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for(;;) {
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if (readdir_r(d,&de,&dptr) != 0)
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break;
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if (!dptr)
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break;
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if ((strcmp(dptr->d_name,".") != 0)&&(strcmp(dptr->d_name,"..") != 0)&&(strlen(dptr->d_name) > 0)) {
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std::string p(path);
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p.push_back(ZT_PATH_SEPARATOR);
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p.append(dptr->d_name);
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if (unlink(p.c_str()) != 0) { // unlink first will remove symlinks instead of recursing them
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if (!rmDashRf(p.c_str()))
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return false;
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}
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}
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}
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closedir(d);
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return (rmdir(path) == 0);
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#endif
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}
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void OSUtils::lockDownFile(const char *path,bool isDir)
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{
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#ifdef __UNIX_LIKE__
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chmod(path,isDir ? 0700 : 0600);
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#else
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#ifdef __WINDOWS__
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{
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STARTUPINFOA startupInfo;
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PROCESS_INFORMATION processInfo;
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startupInfo.cb = sizeof(startupInfo);
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memset(&startupInfo,0,sizeof(STARTUPINFOA));
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memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
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if (CreateProcessA(NULL,(LPSTR)(std::string("C:\\Windows\\System32\\icacls.exe \"") + path + "\" /inheritance:d /Q").c_str(),NULL,NULL,FALSE,CREATE_NO_WINDOW,NULL,NULL,&startupInfo,&processInfo)) {
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WaitForSingleObject(processInfo.hProcess,INFINITE);
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CloseHandle(processInfo.hProcess);
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CloseHandle(processInfo.hThread);
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}
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startupInfo.cb = sizeof(startupInfo);
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memset(&startupInfo,0,sizeof(STARTUPINFOA));
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memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
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if (CreateProcessA(NULL,(LPSTR)(std::string("C:\\Windows\\System32\\icacls.exe \"") + path + "\" /remove *S-1-5-32-545 /Q").c_str(),NULL,NULL,FALSE,CREATE_NO_WINDOW,NULL,NULL,&startupInfo,&processInfo)) {
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WaitForSingleObject(processInfo.hProcess,INFINITE);
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CloseHandle(processInfo.hProcess);
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CloseHandle(processInfo.hThread);
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}
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}
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#endif
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#endif
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}
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bool OSUtils::fileExists(const char *path,bool followLinks)
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{
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struct stat s;
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#ifdef __UNIX_LIKE__
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if (!followLinks)
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return (lstat(path,&s) == 0);
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#endif
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return (stat(path,&s) == 0);
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}
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bool OSUtils::readFile(const char *path,std::string &buf)
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{
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char tmp[16384];
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FILE *f = fopen(path,"rb");
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if (f) {
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for(;;) {
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long n = (long)fread(tmp,1,sizeof(tmp),f);
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if (n > 0)
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buf.append(tmp,n);
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else break;
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}
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fclose(f);
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return true;
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}
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return false;
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}
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bool OSUtils::writeFile(const char *path,const void *buf,unsigned int len)
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{
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FILE *f = fopen(path,"wb");
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if (f) {
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if ((long)fwrite(buf,1,len,f) != (long)len) {
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fclose(f);
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return false;
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} else {
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fclose(f);
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return true;
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}
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}
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return false;
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}
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std::vector<std::string> OSUtils::split(const char *s,const char *const sep,const char *esc,const char *quot)
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{
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std::vector<std::string> fields;
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std::string buf;
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if (!esc)
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esc = "";
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if (!quot)
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quot = "";
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bool escapeState = false;
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char quoteState = 0;
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while (*s) {
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if (escapeState) {
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escapeState = false;
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buf.push_back(*s);
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} else if (quoteState) {
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if (*s == quoteState) {
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quoteState = 0;
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fields.push_back(buf);
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buf.clear();
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} else buf.push_back(*s);
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} else {
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const char *quotTmp;
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if (strchr(esc,*s))
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escapeState = true;
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else if ((buf.size() <= 0)&&((quotTmp = strchr(quot,*s))))
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quoteState = *quotTmp;
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else if (strchr(sep,*s)) {
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if (buf.size() > 0) {
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fields.push_back(buf);
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buf.clear();
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} // else skip runs of separators
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} else buf.push_back(*s);
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}
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++s;
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}
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if (buf.size())
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fields.push_back(buf);
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return fields;
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}
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std::string OSUtils::platformDefaultHomePath()
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{
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#ifdef __QNAP__
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char *cmd = "/sbin/getcfg zerotier Install_Path -f /etc/config/qpkg.conf";
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char buf[128];
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FILE *fp;
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if ((fp = popen(cmd, "r")) == NULL) {
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printf("Error opening pipe!\n");
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return NULL;
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}
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while (fgets(buf, 128, fp) != NULL) { }
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if(pclose(fp)) {
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printf("Command not found or exited with error status\n");
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return NULL;
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}
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std::string homeDir = std::string(buf);
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homeDir.erase(std::remove(homeDir.begin(), homeDir.end(), '\n'), homeDir.end());
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return homeDir;
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#endif
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// Check for user-defined environment variable before using defaults
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#ifdef __WINDOWS__
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DWORD bufferSize = 65535;
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std::string userDefinedPath;
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bufferSize = GetEnvironmentVariable("ZEROTIER_HOME", &userDefinedPath[0], bufferSize);
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if (bufferSize) {
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return userDefinedPath;
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}
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#else
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if(const char* userDefinedPath = getenv("ZEROTIER_HOME")) {
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return std::string(userDefinedPath);
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}
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#endif
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// Finally, resort to using default paths if no user-defined path was provided
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#ifdef __UNIX_LIKE__
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#ifdef __APPLE__
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// /Library/... on Apple
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return std::string("/Library/Application Support/ZeroTier");
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#else
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#ifdef __BSD__
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// BSD likes /var/db instead of /var/lib
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return std::string("/var/db/zerotier");
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#else
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// Use /var/lib for Linux and other *nix
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return std::string("/var/lib/zerotier");
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#endif
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#endif
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#else // not __UNIX_LIKE__
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#ifdef __WINDOWS__
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// Look up app data folder on Windows, e.g. C:\ProgramData\...
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char buf[16384];
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if (SUCCEEDED(SHGetFolderPathA(NULL,CSIDL_COMMON_APPDATA,NULL,0,buf)))
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return (std::string(buf) + "\\ZeroTier");
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else return std::string("C:\\ZeroTier");
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#else
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return (std::string(ZT_PATH_SEPARATOR_S) + "ZeroTier"); // UNKNOWN PLATFORM
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#endif
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#endif // __UNIX_LIKE__ or not...
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}
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#ifndef OMIT_JSON_SUPPORT
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// Inline these massive JSON operations in one place only to reduce binary footprint and compile time
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nlohmann::json OSUtils::jsonParse(const std::string &buf) { return nlohmann::json::parse(buf.c_str()); }
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std::string OSUtils::jsonDump(const nlohmann::json &j,int indentation) { return j.dump(indentation); }
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uint64_t OSUtils::jsonInt(const nlohmann::json &jv,const uint64_t dfl)
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{
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try {
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if (jv.is_number()) {
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return (uint64_t)jv;
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} else if (jv.is_string()) {
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std::string s = jv;
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return (uint64_t)strtoull(s.c_str(),nullptr,10);
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} else if (jv.is_boolean()) {
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return ((bool)jv ? 1ULL : 0ULL);
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}
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} catch ( ... ) {}
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return dfl;
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}
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uint64_t OSUtils::jsonIntHex(const nlohmann::json &jv,const uint64_t dfl)
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{
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try {
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if (jv.is_number()) {
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return (uint64_t)jv;
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} else if (jv.is_string()) {
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std::string s = jv;
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return Utils::hexStrToU64(s.c_str());
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} else if (jv.is_boolean()) {
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return ((bool)jv ? 1ULL : 0ULL);
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}
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} catch ( ... ) {}
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return dfl;
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}
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bool OSUtils::jsonBool(const nlohmann::json &jv,const bool dfl)
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{
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try {
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if (jv.is_boolean()) {
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return (bool)jv;
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} else if (jv.is_number()) {
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return ((uint64_t)jv > 0ULL);
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} else if (jv.is_string()) {
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std::string s = jv;
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if (s.length() > 0) {
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switch(s[0]) {
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case 't':
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case 'T':
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case '1':
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return true;
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}
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}
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return false;
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}
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} catch ( ... ) {}
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return dfl;
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}
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std::string OSUtils::jsonString(const nlohmann::json &jv,const char *dfl)
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{
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try {
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if (jv.is_string()) {
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return jv;
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} else if (jv.is_number()) {
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char tmp[64];
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ztsnprintf(tmp,sizeof(tmp),"%llu",(uint64_t)jv);
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return tmp;
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} else if (jv.is_boolean()) {
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return ((bool)jv ? std::string("1") : std::string("0"));
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}
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} catch ( ... ) {}
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return std::string((dfl) ? dfl : "");
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}
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#endif // OMIT_JSON_SUPPORT
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} // namespace ZeroTier
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