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/* |
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device-tincd.C -- include one of the tincd low level implementations. |
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Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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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 along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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|
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#include <cstdio> |
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#include <cstring> |
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#include <cerrno> |
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|
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/ioctl.h> |
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#include <unistd.h> |
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#include <syslog.h> |
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#include <fcntl.h> |
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|
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#include "conf.h" |
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|
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// following headers used by cygwin (maybe others) |
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#include "netcompat.h" |
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#include <signal.h> |
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|
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#define xstrdup(strd) strdup(str) |
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|
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/* make the tincd sources feel comfortable in our environment. */ |
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/* this was reasonably easy to do. */ |
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#define routing_mode 1 |
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#define RMODE_ROUTER 0 |
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|
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#define LOG_TO_L(level) \ |
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(level) == LOG_ERR ? L_ERR \ |
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: (level) == LOG_DEBUG ? L_DEBUG \ |
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: (level) == LOG_WARNING ? L_WARN \ |
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: (level) == LOG_INFO ? L_INFO \ |
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: L_NOTICE |
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|
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#if __STDC_VERSION__ > 199900 |
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# define logger(level, ...) slog (LOG_TO_L(level), __VA_ARGS__) |
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#elif __GNUC__ |
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# define logger(level, args...) slog (LOG_TO_L(level), ## args) |
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#else |
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# error either need ISO-C 99 compliant compiler or gcc. |
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#endif |
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|
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#define ifdebug(subsys) if (0) |
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|
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#define cp() |
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#define lookup_config(config_tree,key) (key) |
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|
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#define MTU MAX_MTU |
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|
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// BIGGEST hack of 'em all |
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// will be casted to data_packet, due to structural similarity |
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struct vpn_packet_t : net_packet |
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{ |
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u8 data[MAXSIZE]; |
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}; |
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|
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static bool overwrite_mac; |
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|
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static bool |
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get_config_string(const char *key, char **res) |
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{ |
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if (!strcmp (key, "Interface")) |
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*res = conf.ifname; |
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else if (!strcmp (key, "Device")) |
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*res = 0; |
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else if (!strcmp (key, "DeviceType")) |
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*res = "tap"; |
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else |
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{ |
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slog (L_ERR, _("tincd layer asking for unknown config '%s'"), key); |
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*res = 0; |
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} |
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|
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return *res; |
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} |
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|
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#define netname conf.ifname |
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|
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#if IF_linux |
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# include "tincd/linux/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU"; } |
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|
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#elif IF_bsd |
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# include "tincd/bsd/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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|
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#elif IF_freebsd |
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# include "tincd/freebsd/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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|
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#elif IF_netbsd |
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# define IF_istun 1 |
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# include "tincd/netbsd/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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|
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#elif IF_openbsd |
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# define IF_istun 1 |
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# include "tincd/openbsd/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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|
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#elif IF_solaris |
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# define IF_istun 1 |
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# include "tincd/solaris/device.c" |
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const char * tap_device::if_up () { return ""; } |
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|
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#elif IF_cygwin |
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# include "tincd/cygwin/device.c" |
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const char * tap_device::if_up () { return ""; } |
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|
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#elif IF_mingw |
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# include "tincd/mingw/device.c" |
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const char * tap_device::if_up () { return ""; } |
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|
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#elif IF_darwin |
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# define IF_istun 1 |
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# include "tincd/darwin/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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|
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#elif IF_raw_socket |
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# include "tincd/raw_socket/device.c" |
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const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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|
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#elif IF_uml_socket |
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# include "tincd/uml_socket/device.c" |
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const char * tap_device::if_up () { return 0; } |
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|
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#else |
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# error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
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#endif |
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|
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#if IF_istun |
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# include "ether_emu.C" |
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#endif |
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|
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const char * |
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tap_device::info () |
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{ |
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return _("tincd compatibility layer"); |
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} |
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|
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tap_device::tap_device () |
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{ |
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device = "(null)"; |
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|
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bool ok = setup_device (); |
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|
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if (device_info) |
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device = device_info; |
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|
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if (ok) |
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{ |
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slog (L_DEBUG, _("interface %s on %s initialized"), info (), device); |
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fd = device_fd; |
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strcpy (ifrname, iface); |
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} |
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else |
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{ |
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slog (L_ERR, _("error while configuring tincd device %s on %s"), info (), device); |
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exit (EXIT_FAILURE); |
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} |
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} |
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|
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tap_device::~tap_device () |
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{ |
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close_device (); |
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} |
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|
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tap_packet * |
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tap_device::recv () |
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{ |
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tap_packet *pkt = new tap_packet; |
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|
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if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
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{ |
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delete pkt; |
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slog (L_ERR, _("can't read from to %s %s: %s"), info (), device, |
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strerror (errno)); |
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return 0; |
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} |
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|
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#if IF_istun |
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// assume ipv4 |
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(*pkt)[12] = 0x08; |
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(*pkt)[13] = 0x00; |
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|
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if (!ether_emu.tun_to_tap (pkt)) |
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{ |
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delete pkt; |
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return 0; |
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} |
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#endif |
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|
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return pkt; |
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} |
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|
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void |
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tap_device::send (tap_packet *pkt) |
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{ |
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if ( |
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#if IF_istun |
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ether_emu.tap_to_tun (pkt) && |
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#endif |
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!write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
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slog (L_ERR, _("can't write to %s %s: %s"), info (), device, |
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strerror (errno)); |
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} |
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|
