Guus Sliepen [Fri, 5 Jan 2018 21:49:30 +0000 (22:49 +0100)]
Add a cache of recently seen addresses.
This maintains a cache file for each host we have communicated with, either
via TCP or UDP. The cache is used when trying to make outgoing connections,
and is updated whenever a successful TCP or UDP connection is established.
Up to 8 addresses are stored in the cache.
Currently, the cache is stored in /etc/tinc/NETNAME/cache. The directory
has to be manually created to opt in to this feature for now.
Guus Sliepen [Sat, 6 Jan 2018 19:46:22 +0000 (20:46 +0100)]
Fix all spelling errors found by codespell.
Guus Sliepen [Sat, 6 Jan 2018 19:34:37 +0000 (20:34 +0100)]
Document how to enable tinc at boot time using systemd.
Guus Sliepen [Sat, 6 Jan 2018 15:59:21 +0000 (16:59 +0100)]
Don't include generated files into the tarball.
Guus Sliepen [Sat, 6 Jan 2018 15:21:19 +0000 (16:21 +0100)]
Update .gitignore.
Guus Sliepen [Sat, 6 Jan 2018 15:20:25 +0000 (16:20 +0100)]
Ensure the sptps-basic test doesn't fail during make distcheck.
Guus Sliepen [Sat, 6 Jan 2018 15:20:03 +0000 (16:20 +0100)]
Set default systemd unit path to ${libdir}/systemd/system.
This installs systemd unit files into /usr/local, just like the binaries.
The systemd documentation claims to read this directory as well.
Guus Sliepen [Sat, 6 Jan 2018 15:17:35 +0000 (16:17 +0100)]
Remove hardcoded paths from systemd unit files.
Closes #160 on GitHub.
Guus Sliepen [Fri, 5 Jan 2018 18:58:28 +0000 (19:58 +0100)]
Merge remote-tracking branch 'dechamps/ipip' into 1.1
Etienne Dechamps [Tue, 2 Jan 2018 09:55:26 +0000 (09:55 +0000)]
Support MSS clamping for IP in IP (RFC 2003) packets.
This change allows tinc MSS clamping to operate on TCP streams that are
inside an IP in IP tunnel.
Guus Sliepen [Fri, 5 Jan 2018 16:13:57 +0000 (17:13 +0100)]
Add missing newlines to some error messages.
Guus Sliepen [Fri, 5 Jan 2018 16:13:25 +0000 (17:13 +0100)]
Document that invitation files MUST always start with Name = ...
Guus Sliepen [Fri, 5 Jan 2018 16:12:06 +0000 (17:12 +0100)]
Don't warn about empty lines in invitation files.
Guus Sliepen [Mon, 18 Dec 2017 09:47:40 +0000 (10:47 +0100)]
Document the --batch option.
Guus Sliepen [Sat, 16 Dec 2017 21:54:31 +0000 (22:54 +0100)]
Assume all IPPROTO_* macros exist.
Guus Sliepen [Mon, 6 Nov 2017 21:52:17 +0000 (22:52 +0100)]
Fix building documentation when using OpenBSD's make.
Guus Sliepen [Mon, 6 Nov 2017 21:49:41 +0000 (22:49 +0100)]
Update THANKS.
Guus Sliepen [Mon, 6 Nov 2017 21:44:12 +0000 (22:44 +0100)]
Const correctness.
Guus Sliepen [Mon, 6 Nov 2017 21:35:28 +0000 (22:35 +0100)]
Support autoconf's --runstatedir option.
Put the PID file in @runstatedir@ instead of @localstatedir@/run. This
requires autoconf 2.70, which is not released yet, so add a fallback to
use @localstatedir@/run if @runstatedir@ is not set.
Guus Sliepen [Mon, 6 Nov 2017 21:28:32 +0000 (22:28 +0100)]
Ensure all parameters have names in header files.
Guus Sliepen [Mon, 6 Nov 2017 21:27:57 +0000 (22:27 +0100)]
Remove unused functions.
Guus Sliepen [Mon, 6 Nov 2017 20:46:17 +0000 (21:46 +0100)]
Don't log errors when autoconnecting fails and debuglevel is 0.
Guus Sliepen [Thu, 26 Oct 2017 19:33:46 +0000 (21:33 +0200)]
If we are using libncurses, also try to link with libtinfo.
On some distributions, tinc might not be linked correctly if -ltinfo is
not explicitly specified.
Guus Sliepen [Wed, 25 Oct 2017 19:08:29 +0000 (21:08 +0200)]
Only forward SPTPS packets if Forwarding = internal.
This tries to match what is done for packets using the legacy protocol.
However, since SPTPS is end-to-end encrypted, Forwarding = kernel cannot
be implemented. In that case, we also drop the packets.
Todd C. Miller [Wed, 25 Oct 2017 16:05:06 +0000 (10:05 -0600)]
Replace remaining sizeof foo with sizeof(foo).
Guus Sliepen [Mon, 23 Oct 2017 19:10:20 +0000 (21:10 +0200)]
Disable PMTU discovery when TCPOnly is used.
Guus Sliepen [Wed, 11 Oct 2017 17:30:17 +0000 (19:30 +0200)]
Add some information about the requirements of a chroot environment.
Guus Sliepen [Sun, 8 Oct 2017 19:32:12 +0000 (21:32 +0200)]
Ensure "make distcheck" really runs without errors.
Guus Sliepen [Sat, 7 Oct 2017 15:50:22 +0000 (17:50 +0200)]
Reformat all code using astyle.
Guus Sliepen [Sat, 7 Oct 2017 15:47:19 +0000 (17:47 +0200)]
Convert sizeof foo to sizeof(foo).
While technically sizeof is an operator and doesn't need the parentheses
around expressions it operates on, except if they are type names, code
formatters don't seem to handle this very well.
Guus Sliepen [Sat, 7 Oct 2017 15:40:34 +0000 (17:40 +0200)]
Update all header guards.
Don't start with underscores, as those are reserved for system
libraries. Make sure all start with TINC_, and that they appear at
the top of the file.
Guus Sliepen [Sat, 7 Oct 2017 14:51:32 +0000 (16:51 +0200)]
Remove unused/obsolete checks from configure.ac.
Daniel Lublin [Thu, 5 Oct 2017 07:23:20 +0000 (09:23 +0200)]
doc: there is, not their is
Guus Sliepen [Tue, 3 Oct 2017 19:23:28 +0000 (21:23 +0200)]
Prepare for automatic code formatting using Artistic Style.
Guus Sliepen [Sun, 1 Oct 2017 20:04:40 +0000 (22:04 +0200)]
Update THANKS.
Todd C. Miller [Thu, 28 Sep 2017 22:39:59 +0000 (16:39 -0600)]
Fix parsing of -b flag
Only the short -b option is missing, --batch works as expected.
Guus Sliepen [Sat, 2 Sep 2017 19:56:17 +0000 (21:56 +0200)]
Releasing 1.1pre15.
Guus Sliepen [Sat, 2 Sep 2017 19:55:47 +0000 (21:55 +0200)]
Drop h and hh length modifiers from printf format strings.
Guus Sliepen [Sat, 2 Sep 2017 19:54:34 +0000 (21:54 +0200)]
Ensure packet priority is cleared when sending PMTU probe replies.
Found by the Clang static analyzer.
Guus Sliepen [Sat, 2 Sep 2017 19:52:44 +0000 (21:52 +0200)]
Fix a file descriptor leak when using an invitation.
Found by cppcheck.
Guus Sliepen [Sat, 2 Sep 2017 19:06:25 +0000 (21:06 +0200)]
Fix a compiler warning.
Guus Sliepen [Sat, 2 Sep 2017 15:24:05 +0000 (17:24 +0200)]
Force IPv4 for sptps-basic.test.
Allow forcing either IPv4 or IPv6 for sptps_test, and use IPv4 for the
sptps-basic test. Since sptps_test is only opening a single listening
socket, and you cannot control which address family it uses, this gets
around a problem where the listening side is using a different address
family than the one connecting to it.
Guus Sliepen [Sat, 2 Sep 2017 15:04:25 +0000 (17:04 +0200)]
Add missing break statements.
Guus Sliepen [Tue, 22 Aug 2017 18:51:44 +0000 (20:51 +0200)]
Make autoconnect try to heal network splits.
When we have less than three connections, we greedily try to connect to any
viable node. However, once we have three connections, try to connect to
nodes that we know of but that aren't reachable.
We also make sure that if there are 100 reachable nodes, and 1 unreachable
one, that not all 100 reachable nodes try to connect to the unreachable
at the same time.
pacien [Tue, 15 Aug 2017 17:56:06 +0000 (19:56 +0200)]
Add LogLevel config option
Guus Sliepen [Thu, 27 Jul 2017 08:06:13 +0000 (10:06 +0200)]
Forward-port tinc 1.0's handling of device errors.
volth [Thu, 27 Jul 2017 06:32:28 +0000 (06:32 +0000)]
Avoid infinite loop on EBADFD
On Linux network restart, Tinc can get into a loop writing millions of error messages "Error while reading from Linux tun/tap device (tun mode) /dev/net/tun: File descriptor in bad state" to the log. https://github.com/NixOS/nixpkgs/pull/27675
It should be somehow aborted.
Here is my quick hack.
Guus Sliepen [Sun, 9 Jul 2017 14:12:55 +0000 (16:12 +0200)]
Store the invitation data after a succesful join.
This can be used by the invitee to examine the file after a join, and
process it in different ways than the tinc CLI does.
Guus Sliepen [Sun, 9 Jul 2017 13:57:51 +0000 (15:57 +0200)]
Add configurable experation time for invitations.
Guus Sliepen [Sun, 28 May 2017 10:48:32 +0000 (12:48 +0200)]
Set KillMode=mixed in the systemd service file.
This ensures only the main process is sent the SIGTERM, and not anything
else that might have started in the same control group, including the
tinc-down script.
Closes #145 on GitHub.
Guus Sliepen [Sun, 28 May 2017 10:26:44 +0000 (12:26 +0200)]
Move logging of "would block" messages to debug level 4.
Guus Sliepen [Sun, 7 May 2017 13:29:22 +0000 (15:29 +0200)]
Remove unused add_scalar function.
thorkill [Thu, 4 May 2017 21:44:56 +0000 (23:44 +0200)]
Fix NULL pointer dereference in send_udp_info
thorkill [Mon, 1 May 2017 10:40:22 +0000 (12:40 +0200)]
Sanitize input in id_h - prevent integer overflows
Guus Sliepen [Tue, 18 Apr 2017 18:09:38 +0000 (20:09 +0200)]
Fix some minor issues found by cppcheck.
Guus Sliepen [Tue, 18 Apr 2017 18:09:08 +0000 (20:09 +0200)]
Add field widths to sscanf() calls.
Found by cppcheck.
Guus Sliepen [Tue, 18 Apr 2017 18:07:33 +0000 (20:07 +0200)]
Remove dead stores.
Found by the Clang static analyzer.
Guus Sliepen [Mon, 17 Apr 2017 14:05:30 +0000 (16:05 +0200)]
Add missing tinc stop command to the scripts test.
Guus Sliepen [Mon, 17 Apr 2017 11:54:02 +0000 (13:54 +0200)]
Fix tests on *BSD.
Guus Sliepen [Mon, 17 Apr 2017 11:53:48 +0000 (13:53 +0200)]
Fix segfault when adding environment variables.
Guus Sliepen [Mon, 17 Apr 2017 11:07:15 +0000 (13:07 +0200)]
Fix compiler warnings on *BSD.
Guus Sliepen [Mon, 17 Apr 2017 11:02:39 +0000 (13:02 +0200)]
Make sure realname is always initialized.
Guus Sliepen [Mon, 17 Apr 2017 10:50:30 +0000 (12:50 +0200)]
Ensure tests compile on *BSD.
Guus Sliepen [Sat, 8 Apr 2017 11:34:40 +0000 (13:34 +0200)]
Use getmsg()/putmsg() instead of read()/write() on Solaris.
This fixes a problem where read() returns packets from the IP layer before
fragmentation is done.
# Conflicts:
# src/solaris/device.c
Guus Sliepen [Sat, 8 Apr 2017 11:31:04 +0000 (13:31 +0200)]
Use /dev/udp instead of /dev/ip on Solaris.
# Conflicts:
# src/solaris/device.c
Guus Sliepen [Wed, 29 Mar 2017 06:08:56 +0000 (08:08 +0200)]
Ensure sptps_keypair and sptps_test get build for make check.
Guus Sliepen [Wed, 29 Mar 2017 06:08:19 +0000 (08:08 +0200)]
Use 127.0.0.1 instead of localhost to ensure tests are reproducible.
Guus Sliepen [Sun, 26 Mar 2017 15:54:37 +0000 (17:54 +0200)]
Ensure proper logging in the invite-offline test.
Guus Sliepen [Sun, 26 Mar 2017 15:43:33 +0000 (17:43 +0200)]
Add the scripts test.
This test whether all the scripts are run with the right information in
the right order.
Guus Sliepen [Sun, 26 Mar 2017 14:48:02 +0000 (16:48 +0200)]
Update .gitignore.
Guus Sliepen [Sun, 26 Mar 2017 14:47:54 +0000 (16:47 +0200)]
Add the invite-offline test.
This tests generating an invitation on the server while no tinc daemon is
running.
Guus Sliepen [Sun, 26 Mar 2017 14:46:31 +0000 (16:46 +0200)]
Remove superfluous sleep command in invite-join test.
Guus Sliepen [Sun, 26 Mar 2017 14:46:03 +0000 (16:46 +0200)]
Use unique ports for all tests.
Guus Sliepen [Tue, 21 Mar 2017 20:25:27 +0000 (21:25 +0100)]
Add DEBUG environment variable for scripts.
This contains the current debug level used by tinc. Scripts can use it
to decide whether to log debugging information of their own.
Closes #138 on GitHub.
Guus Sliepen [Tue, 21 Mar 2017 20:21:23 +0000 (21:21 +0100)]
Put script environment creation/deletion in functions.
This makes environment handling safer, and also has a single place where
we can add new environment variables that should be present for all
scripts.
Vittorio Gambaletta (VittGam) [Wed, 12 Oct 2016 11:52:17 +0000 (13:52 +0200)]
route: Support ToS/DiffServ priority inheritance when routing IPv6 packets.
Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
Guus Sliepen [Mon, 20 Mar 2017 21:33:18 +0000 (22:33 +0100)]
Merge remote-tracking branch 'dechamps/sleep' into 1.1
Guus Sliepen [Mon, 20 Mar 2017 21:19:36 +0000 (22:19 +0100)]
Don't try to use kill() on Windows.
Guus Sliepen [Mon, 20 Mar 2017 21:15:20 +0000 (22:15 +0100)]
Add missing #defines used by fd_device.c.
Guus Sliepen [Tue, 7 Mar 2017 18:19:19 +0000 (19:19 +0100)]
Use free_known_addresses() to free memory allocated by get_known_addresses().
We know what struct addrinfo looks like, but the standard says nothing
about how it is allocated. So we cannot trust freeaddrinfo() to work
correctly on the struct addrinfo list we allocated ourselves in
get_known_addresses(). To make a distinction by allocations from the
latter and from str2addrinfo(), we keep two pointers (*ai and *kai) in
struct outgoing, and use the freeing function that is appropriate for
each.
Roman Savelyev [Tue, 7 Mar 2017 18:07:19 +0000 (19:07 +0100)]
Fix lost pointer trails in get_known_addresses().
Pacien TRAN-GIRARD [Mon, 27 Feb 2017 19:56:55 +0000 (20:56 +0100)]
Add fd_device
Guus Sliepen [Tue, 14 Feb 2017 19:51:43 +0000 (20:51 +0100)]
Remove the description of the LocalDiscoveryAddress option from the manual.
This option is no longer implemented.
Guus Sliepen [Tue, 31 Jan 2017 11:05:03 +0000 (12:05 +0100)]
Don't build sptps_* binaries by default.
Guus Sliepen [Tue, 31 Jan 2017 11:03:27 +0000 (12:03 +0100)]
Fix potential segfault in the replacement vasprintf() function.
Etienne Dechamps [Sun, 18 Dec 2016 14:53:33 +0000 (14:53 +0000)]
Fix address memory leaks in add_edge_h().
Note that this is not as bad as it looks, because in practice
sockaddrfree() is a no-op for typical address types.
Etienne Dechamps [Sun, 18 Dec 2016 14:32:25 +0000 (14:32 +0000)]
Clarify the flow of add_edge_h().
This is an attempt at making the control flow through this function
easier to understand by rearranging branches and cutting back on
indentation levels.
This is a pure refactoring; there is no change in behavior.
Etienne Dechamps [Sun, 18 Dec 2016 14:25:20 +0000 (14:25 +0000)]
Fix edge updates containing local address changes.
This commit fixes a logic bug in the edge update code where local
address changes are not taken into account if they are bundled in with
other changes. This bug breaks local discovery in some scenarios.
The regression was introduced by commit
e4670fc4a0576eb76f1807ce29fa9455dd247632.
Etienne Dechamps [Sun, 18 Dec 2016 16:56:27 +0000 (16:56 +0000)]
Fix edge local addresses not being set when connections are established.
This bug prevented nodes from advertising their local addresses, thus
breaking local discovery.
The regression was introduced in
ab13c14a1480561bb9f59ccfbbd6045e0484ce9c.
Etienne Dechamps [Sat, 3 Dec 2016 23:13:46 +0000 (23:13 +0000)]
On Windows, don't cancel I/O when disabling the device.
I have observed cases where disable_device() can get stuck on the
GetOverlappedResult() call, especially when the computer is waking up
from sleep. This is problematic when combined with DeviceStandby=yes:
other_side (1.2.3.4 port 655) didn't respond to PING in 5 seconds
Closing connection with other_side (1.2.3.4 port 655)
Disabling Windows tap device
<STUCK>
gdb reveals the following stack trace:
#0 0x77c7dd3c in ?? ()
#1 0x7482aad0 in KERNELBASE!GetOverlappedResult () from C:\WINDOWS\SysWoW64\KernelBase.dll
#2 0x0043c343 in disable_device () at mingw/device.c:244
#3 0x0040fcee in device_disable () at net_setup.c:759
#4 0x00405bb5 in check_reachability () at graph.c:292
#5 0x00405be2 in graph () at graph.c:301
#6 0x004088db in terminate_connection (c=0x4dea5c0, report=true) at net.c:108
#7 0x00408aed in timeout_handler (data=0x5af0c0 <pingtimer>) at net.c:168
#8 0x00403af8 in get_time_remaining (diff=0x2a8fd64) at event.c:239
#9 0x00403b6c in event_loop () at event.c:303
#10 0x00409904 in main_loop () at net.c:461
#11 0x00424a95 in main2 (argc=6, argv=0x2b42a60) at tincd.c:489
#12 0x00424788 in main (argc=6, argv=0x2b42a60) at tincd.c:416
This is with TAP-Win32 9.0.0.9. I suspect driver bugs related to sleep.
In any case, this commit fixes the issue by cancelling I/O only when the
entire tinc process is being gracefully shut down, as opposed to every
time the device is disabled. Thankfully, the driver seems to be
perfectly fine with this code issuing TAP_IOCTL_SET_MEDIA_STATUS ioctls
while there are I/O operations inflight.
Etienne Dechamps [Sat, 3 Dec 2016 22:52:30 +0000 (22:52 +0000)]
Fix crash on Windows when a socket is available for both write and read.
Currently, if both write and read events fire at the same time on a
socket, the Windows-specific event loop will call both the write and
read callbacks, in that order. Problem is, the write callback could have
deleted the io handle, which makes the next call to the write callback a
use-after-free typically resulting in a hard crash.
In practice, this issue is triggered quite easily by putting the
computer to sleep, which basically freezes the tinc process. When the
computer wakes up and the process resumes, all TCP connections are
suddenly gone; as a result, the following sequence of events might
appear in the logs:
Metadata socket read error for node1 (1.2.3.4 port 655): (10054) An existing connection was forcibly closed by the remote host.
Closing connection with node1 (1.2.3.4 port 655)
Sending DEL_EDGE to everyone (BROADCAST): 13 4bf6 mynode node1
Sending 43 bytes of metadata to node2 (5.6.7.8 port 655)
Could not send 10891 bytes of data to node2 (5.6.7.8 port 655): (10054) An existing connection was forcibly closed by the remote host.a
Closing connection with node2 (5.6.7.8 port 655)
<CRASH>
In this example the crash occurs because the socket to node2 was
signaled for reading *in addition* to writing, but since the connection
was terminated, the attempt to call the read callback crashed the
process.
This commit fixes the problem by not even attempting to fire the write
callback when the write event on the socket is signaled - instead, we
just rely on the part of the event loop that simulates level-triggered
write events. Arguably that's even cleaner and faster, because the code
being removed was technically redundant - we have to go through that
write check loop anyway.
Guus Sliepen [Sun, 30 Oct 2016 14:19:12 +0000 (15:19 +0100)]
Enforce maximum amount of bytes sent/received on meta-connections.
This is 2^{block_length_in_bits / 2 - 1}.
Guus Sliepen [Sun, 30 Oct 2016 14:17:52 +0000 (15:17 +0100)]
Use AES256 and SHA256 by default for the legacy protocol.
At the start of the decade, there were still distributions that shipped
with versions of OpenSSL that did not support these algorithms. By now
everyone should support them. The old defaults were Blowfish and SHA1,
both of which are not considered secure anymore.
The meta-protocol now always uses AES in CFB mode, but the key length
will adapt to the one specified by the Cipher option. The digest for the
meta-protocol is hardcoded to SHA256.
Dennis Lan [Wed, 12 Oct 2016 11:35:39 +0000 (13:35 +0200)]
Fix typo in src/upnp.c.
Vittorio G (VittGam) [Tue, 11 Oct 2016 18:30:41 +0000 (20:30 +0200)]
tincctl: Avoid falling back to 1024 bits RSA key generation when an invalid key size is specified.
Also warn the user if a key smaller than 2048 bits is being generated.
Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
Vittorio G (VittGam) [Tue, 11 Oct 2016 11:30:05 +0000 (13:30 +0200)]
fsck: Fix
ed25519 public key reading, and fclose usage.
Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
Guus Sliepen [Tue, 26 Jul 2016 14:47:45 +0000 (16:47 +0200)]
Log warnings about dropped packets only with debug level 5 or higher.
Etienne Dechamps [Thu, 14 Jul 2016 18:15:35 +0000 (19:15 +0100)]
Fix error handling when setting up the UDP socket.
Due to this typo, if tinc managed to set up the TCP socket but not the
UDP socket, it would continue anyway.
The regression was introduced in
6bc5d626a8726fc23365ee705761a3c666a08ad4.
Guus Sliepen [Fri, 24 Jun 2016 09:22:24 +0000 (11:22 +0200)]
Fix compiling with OpenSSL < 1.1.0.
Guus Sliepen [Fri, 24 Jun 2016 09:22:11 +0000 (11:22 +0200)]
Add missing m4 files.
ax_cflags_warn_all.m4 depends on them.