libmnl doesn't check lengths, so do our own checking before copying the
interface name to the netlink buffer.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This is probably more sensible, since there's no point in letting
traffic flow before the interface is configured.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Currently PreUp hooks run before the interface is created. This is
problematic for moving the device into a Linux VRFs as this will
currently clear all assigned IPv6 addressess (possibly a bug), so if we
did this in PostUp (i.e. before add_addr) we'll have to manually re-add
all assigned addresses. This is obviously less than ideal.
Instead create the wg device just before running PreUp hooks. We apply
this to all platforms for consistency.
Test case:
$ ip link add vrf-test type vrf table 1234
$ ip link add wg-test type wireguard
$ ip addr add dev wg-test 192.168.42.42/24
$ ip addr add dev wg-test fe80::/64
$ ip -br addr show wg-test
wg-test DOWN 192.168.42.42/24 fe80::/64
$ ip link set dev wg-test master vrf-test
$ ip -br addr show wg-test
wg-test DOWN 192.168.42.42/32
Signed-off-by: Daniel Gröber <dxld@darkboxed.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Currently "wg show all endpoints" prints interface name only once
while other "show all" commands print it on each line as man says.
Signed-off-by: Dmitry Selivanov <dseliv@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The `err` path in kernel_set_device() will attempt to free() allocated
nvl_peers, but these two cases meant we could end up attempting a use
after free or a double free, as we rely on nvlist_destroy(NULL) being
a NOP as well as free(NULL).
FreeBSD-Coverity: 1500421
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Primarily, front-load validation of an allowed-ip entry to before we
allocate `aip`, so that we don't need to free() it if we end up skipping
this entry. Assert that `aip` is NULL after we exit the loop, as we
should have transfered ownership to the `peer` or freed it in all paths
through the allowed-ip loop.
FreeBSD-Coverity: 1500405
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
When we re-added if_wg to the tree, we changed directories in dev to
strip the if_ (we don't use this prefix for other interfaces'
directories). Adjust it here as a convenience, so that when we import
wireguard-tools to FreeBSD the path will just work as-is with our usual
build.
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The wireguard route table ip rule should stay as a no-op until the
`suppress_prefixlength 0 table main` rule is in effect. Therefore, add
the wireguard default route to its route table after the latter rule is
added.
Signed-off-by: Tom Yan <tom.ty89@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
To make it easier for FreeBSD to import wg(8), dual license the core
files as MIT, so that they don't have any trouble.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Looks like the "is valid ifname" regex was copy and pasted from
wg-quick.bash instead of the "is valid IP" regex.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Define wg_endpoint as a named union to allow users of the emeddable
library to use the type in function arguments, variables etc.
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
OpenBSD has introduced a new daemon named resolvd(8) to manage
resolv.conf. This creates problems with the old "horrible way" of
completely replacing resolv.conf. Resolvd will attempt to merge manual
changes with DNS servers discovered through dhcpleased(8) and slaacd(8).
Unfortunately, resolvd puts any manual modifications at the end of
resolv.conf, meaning that the wg-quick name servers will be queried
last.
The process for handling multiple name servers (at least with libc) is
to try a name server, and if the query times out, try the next, until
out of name servers, then repeat trying all name servers until a maximum
number of retries are performed. The name servers are queried in the
order listed in resolv.conf and the timeout is 5 seconds.
With this patch, we ensure the wg-quick name server is first in
resolv.conf (as route creates the name server with "static" priority),
but cannot ensure it is exclusive. Therfore, it may be possible that
queries are leaked to other name servers if the wg-quick name server
doesn't respond within 5 seconds.
We have another problem however, and that is if resolvd detects unwind
is running, it will set 127.0.0.1 as the only name server in
resolv.conf. unwind does not have deterministic name server selection in
the default configuration. This means, all a user would need to do to
inadvertently cause persistent query leaks would be to run `rcctl enable
unwind`.
There are warnings added when these situations may occur.
The next step is to add an exclusive flag and search to route and
resolvd.
Reported-by: Matthieu Herrb <matthieu@herrb.eu>
Signed-off-by: Matt Dunwoodie <ncon@noconroy.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
On macOS, under specific configurations, the `netstat -nr -f inet` and
`netstat -nr -f inet6` outputs break gateway collection.
Signed-off-by: Laura Hausmann <laura@hausmann.dev>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
If the route monitor doesn't attempt to write more to stdout, then this
leaves a process hanging around. Kill it explicitly. We also switch to
using exec in the process substitution, to reduce a bash process.
Closes: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255286
Reported-by: Christos Chatzaras <chris@cretaforce.gr>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
We no longer need the arp hack, as these bugs have been fixed in the
FreeBSD kernel.
This partially reverts 090639ae90.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
FreeBSD's bash doesn't handle <(...) safely, creating a temporary file
instead of using /proc/self/fd/N like on Linux. Work around this by
using a simple pipeline with /dev/stdin.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
