/* vim: set expandtab ts=4 sw=4: */ /* * You may redistribute this program and/or modify it under the terms of * the GNU General Public License as published by the Free Software Foundation, * either version 3 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "exception/Except.h" #include "interface/Interface.h" #include "interface/TUNConfigurator.h" #include "util/Bits.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Tun Configurator for OpenBSD. */ struct Interface* TUNInterface_new(const char* interfaceName, char assignedInterfaceName[TUNInterface_IFNAMSIZ], struct EventBase* base, struct Log* logger, struct Except* eh, struct Allocator* alloc) { // to store the tunnel device index int ppa = 0; // Open the descriptor int tunFd = open("/dev/tun0", O_RDWR); if (tunFd == -1) { tunFd = open("/dev/tun1", O_RDWR); ppa = 1; } if (tunFd == -1) { tunFd = open("/dev/tun2", O_RDWR); ppa = 2; } if (tunFd == -1) { tunFd = open("/dev/tun3", O_RDWR); ppa = 3; } if (tunFd < 0 ) { int err = errno; close(tunFd); char* error = NULL; if (tunFd < 0) { error = "open(\"/dev/tunX\")"; } Except_raise(eh, TUNConfigurator_initTun_INTERNAL, error, strerror(err)); } // Since devices are numbered rather than named, it's not possible to have tun0 and cjdns0 // so we'll skip the pretty names and call everything tunX snprintf(assignedInterfaceName, TUNConfigurator_IFNAMSIZ, "tun%d", ppa); char* error = NULL; if (error) { int err = errno; close(tunFd); Except_raise(eh, TUNConfigurator_initTun_INTERNAL, "%s [%s]", error, strerror(err)); } struct Pipe* p = Pipe_forFiles(tunFd, tunFd, base, eh, alloc); return BSDMessageTypeWrapper_new(&p->iface, logger); }