X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fuml_device.c;h=a675b62e045ab8b2c285d2c028c8f0441892c432;hb=refs%2Fheads%2F1.1;hp=dbb13e937b3dbcdc79302ffa2d3e4ba55226f8c0;hpb=38489e37f50e807e51bfd28ebb8b20396eed1447;p=tinc diff --git a/src/uml_device.c b/src/uml_device.c deleted file mode 100644 index dbb13e93..00000000 --- a/src/uml_device.c +++ /dev/null @@ -1,305 +0,0 @@ -/* - device.c -- UML network socket - Copyright (C) 2002-2005 Ivo Timmermans, - 2002-2017 Guus Sliepen - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 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, write to the Free Software Foundation, Inc., - 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. -*/ - -#include "system.h" - -#include - -#include "conf.h" -#include "device.h" -#include "names.h" -#include "net.h" -#include "logger.h" -#include "utils.h" -#include "route.h" -#include "xalloc.h" - -static int listen_fd = -1; -static int request_fd = -1; -static int data_fd = -1; -static int write_fd = -1; -static int state = 0; -static const char *device_info = "UML network socket"; - -enum request_type { REQ_NEW_CONTROL }; - -static struct request { - uint32_t magic; - uint32_t version; - enum request_type type; - struct sockaddr_un sock; -} request; - -static struct sockaddr_un data_sun; - -static bool setup_device(void) { - struct sockaddr_un listen_sun; - static const int one = 1; - struct { - char zero; - int pid; - int usecs; - } name; - struct timeval tv; - - if(!get_config_string(lookup_config(config_tree, "Device"), &device)) { - xasprintf(&device, RUNSTATEDIR "/%s.umlsocket", identname); - } - - get_config_string(lookup_config(config_tree, "Interface"), &iface); - - if((write_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not open write %s: %s", device_info, strerror(errno)); - event_exit(); - return false; - } - -#ifdef FD_CLOEXEC - fcntl(write_fd, F_SETFD, FD_CLOEXEC); -#endif - - setsockopt(write_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); - - if(fcntl(write_fd, F_SETFL, O_NONBLOCK) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno)); - event_exit(); - return false; - } - - if((data_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not open data %s: %s", device_info, strerror(errno)); - event_exit(); - return false; - } - -#ifdef FD_CLOEXEC - fcntl(data_fd, F_SETFD, FD_CLOEXEC); -#endif - - setsockopt(data_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); - - if(fcntl(data_fd, F_SETFL, O_NONBLOCK) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno)); - event_exit(); - return false; - } - - name.zero = 0; - name.pid = getpid(); - gettimeofday(&tv, NULL); - name.usecs = tv.tv_usec; - data_sun.sun_family = AF_UNIX; - memcpy(&data_sun.sun_path, &name, sizeof(name)); - - if(bind(data_fd, (struct sockaddr *)&data_sun, sizeof(data_sun)) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind data %s: %s", device_info, strerror(errno)); - event_exit(); - return false; - } - - if((listen_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", device_info, - strerror(errno)); - return false; - } - -#ifdef FD_CLOEXEC - fcntl(device_fd, F_SETFD, FD_CLOEXEC); -#endif - - setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); - - if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno)); - return false; - } - - listen_sun.sun_family = AF_UNIX; - strncpy(listen_sun.sun_path, device, sizeof(listen_sun.sun_path)); - - if(bind(listen_fd, (struct sockaddr *)&listen_sun, sizeof(listen_sun)) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind %s to %s: %s", device_info, device, strerror(errno)); - return false; - } - - if(listen(listen_fd, 1) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not listen on %s %s: %s", device_info, device, strerror(errno)); - return false; - } - - device_fd = listen_fd; - state = 0; - - logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info); - - if(routing_mode == RMODE_ROUTER) { - overwrite_mac = true; - } - - return true; -} - -void close_device(void) { - if(listen_fd >= 0) { - close(listen_fd); - listen_fd = -1; - } - - if(request_fd >= 0) { - close(request_fd); - request_fd = -1; - } - - if(data_fd >= 0) { - close(data_fd); - data_fd = -1; - } - - if(write_fd >= 0) { - close(write_fd); - write_fd = -1; - } - - unlink(device); - - free(device); - device = NULL; - - if(iface) { - free(iface); - iface = NULL; - } - - device_info = NULL; -} - -static bool read_packet(vpn_packet_t *packet) { - int inlen; - - switch(state) { - case 0: { - struct sockaddr sa; - socklen_t salen = sizeof(sa); - - request_fd = accept(listen_fd, &sa, &salen); - - if(request_fd < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not accept connection to %s %s: %s", device_info, device, strerror(errno)); - return false; - } - -#ifdef FD_CLOEXEC - fcntl(request_fd, F_SETFD, FD_CLOEXEC); -#endif - - if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "fcntl", strerror(errno)); - event_exit(); - return false; - } - - close(listen_fd); - listen_fd = -1; - device_fd = request_fd; - state = 1; - - return false; - } - - case 1: { - if((inlen = read(request_fd, &request, sizeof(request))) != sizeof(request)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading request from %s %s: %s", device_info, - device, strerror(errno)); - event_exit(); - return false; - } - - if(request.magic != 0xfeedface || request.version != 3 || request.type != REQ_NEW_CONTROL) { - logger(DEBUG_ALWAYS, LOG_ERR, "Unknown magic %x, version %d, request type %d from %s %s", - request.magic, request.version, request.type, device_info, device); - event_exit(); - return false; - } - - if(connect(write_fd, (struct sockkadr *)&request.sock, sizeof(request.sock)) < 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind write %s: %s", device_info, strerror(errno)); - event_exit(); - return false; - } - - write(request_fd, &data_sun, sizeof(data_sun)); - device_fd = data_fd; - - logger(DEBUG_ALWAYS, LOG_INFO, "Connection with UML established"); - - state = 2; - return false; - } - - case 2: { - if((inlen = read(data_fd, DATA(packet), MTU)) <= 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, - device, strerror(errno)); - event_exit(); - return false; - } - - packet->len = inlen; - - logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, - device_info); - - return true; - } - - default: - logger(DEBUG_ALWAYS, LOG_ERR, "Invalid value for state variable in " __FILE__); - abort(); - } -} - -static bool write_packet(vpn_packet_t *packet) { - if(state != 2) { - logger(DEBUG_TRAFFIC, LOG_DEBUG, "Dropping packet of %d bytes to %s: not connected to UML yet", - packet->len, device_info); - return false; - } - - logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s", - packet->len, device_info); - - if(write(write_fd, DATA(packet), packet->len) < 0) { - if(errno != EINTR && errno != EAGAIN) { - logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno)); - event_exit(); - } - - return false; - } - - return true; -} - -const devops_t uml_devops = { - .setup = setup_device, - .close = close_device, - .read = read_packet, - .write = write_packet, -};