Commit graph

381 commits

Author SHA1 Message Date
Ondrej Zajicek (work)
d6cf996151 IO: Fix socket priority
On Linux, setting the ToS will also set the priority and the range of
accepted values is quite limited (masked by 0x1e). Therefore, 0xc0 is
translated to a priority of 0, not something we want, overriding the
"7" priority which was set previously explicitely. To avoid that, just
move setting priority later in the code.

Thanks to Vincent Bernat for the patch.
2018-01-23 17:05:45 +01:00
Ondrej Zajicek (work)
b940579115 Filter: Allow silent filter execution
A filter should log messages only if executed explicitly (e.g., during
route export or route import). When a filter is executed for technical
reasons (e.g., to establish whether a route was exported before), it
should run silently.
2018-01-16 16:20:01 +01:00
Ondrej Zajicek (work)
943478b00f Basic VRF support
Add basic VRF (virtual routing and forwarding) support. Protocols can be
associated with VRFs, such protocols will be restricted to interfaces
assigned to the VRF (as reported by Linux kernel) and will use sockets
bound to the VRF. E.g., different multihop BGP instances can use diffent
kernel routing tables to handle BGP TCP connections.

The VRF support is preliminary, currently there are several limitations:

- Recent Linux kernels (4.11) do not handle correctly sockets bound
to interaces that are part of VRF, so most protocols other than multihop
BGP do not work. This will be fixed by future kernel versions.

- Neighbor cache ignores VRFs. Breaks config with the same prefix on
local interfaces in different VRFs. Not much problem as single hop
protocols do not work anyways.

- Olock code ignores VRFs. Breaks config with multiple BGP peers with the
same IP address in different VRFs.

- Incoming BGP connections are not dispatched according to VRFs.
Breaks config with multiple BGP peers with the same IP address in
different VRFs. Perhaps we would need some kernel API to read VRF of
incoming connection? Or probably use multiple listening sockets in
int-new branch.

- We should handle master VRF interface up/down events and perhaps
disable associated protocols when VRF goes down. Or at least disable
associated interfaces.

- Also we should check if the master iface is really VRF iface and
not some other kind of master iface.

- BFD session request dispatch should be aware of VRFs.

- Perhaps kernel protocol should read default kernel table ID from VRF
iface so it is not necessary to configure it.

- Perhaps we should have per-VRF default table.
2017-09-06 17:38:48 +02:00
Ondrej Zajicek (work)
78e4dac993 Fix some forgotten warnings 2017-05-18 14:26:57 +02:00
Ondrej Zajicek (work)
b845ea097c Remove autoconf macros for time_t and alignment
Replaced by constant compile-time expressions. CPU_STRUCT_ALIGN is not
really correct, but is consistent with the old behavior.
2017-05-16 13:05:00 +02:00
Ondrej Zajicek (work)
e40542ef3a Minor autoconf cleanup and documentation update 2017-05-16 12:59:22 +02:00
Ondrej Zajicek (work)
c253ec3a9c Some more autoconf cleanups
Replace integer type width detection with C99 fixed-width types.
Also remove some unused or obsolete code.

Thanks to Ruben Kerkhof for the patchset.
2017-05-16 12:59:22 +02:00
Jan Moskyto Matejka
2c33da5070 Netlink: fix occasional netlink hangs on busy machines 2016-12-20 20:36:56 +01:00
Ondrej Zajicek (work)
c8cafc8ebb Minor code cleanups 2016-11-08 17:46:29 +01:00
Jan Moskyto Matejka
3e236955c9 Build: switch on -Wextra, get rid of most of the warnings
There are several unresolved -Wmissing-field-initializers on older
versions of GCC than 5.1, all of them false positive.
2016-11-01 14:52:54 +01:00
Ondrej Zajicek (work)
17fe57d8dc Log: Fix broken syslog name
BIRD passed string from configuration to openlog(), which kept it
internally. After reconfiguration the old string was freed, therefore
openlog had invalid copy.

Thanks to Chris Caputo for the original patch.
2016-11-01 11:37:49 +01:00
Jan Moskyto Matejka
ccd2a3eda2 Kernel socket missing err_hook fix
Thanks to Tim Weippert for bugreport.
2016-09-29 13:21:16 +02:00
Pavel Tvrdik
292f7858e6 Main: Improve BIRD help messages 2016-09-15 17:30:52 +02:00
Pavel Tvrdik
a290da25a1 rt-table: Fix kernel protocol export filter memory bug
Kernel protocol calls rt_export_merged(), which used @rte_update_pool for
temporary allocations, supposing it is called from other functions from
rt-table.c that handles locking and flushing of the linpool. Therefore,
linpool was not flushed properly and memory leaked.

Add linpool argument to rt_export_merged() and use @krt_filter_lp when
called from kernel protocol.

Thanks to Justin Cattle and Alexander Frolkin for the bugreport.

(Commit squashed and updated by Ondrej Zajicek)
2016-09-15 15:57:51 +02:00
Ondrej Zajicek (work)
a1839f3c61 KRT: Fix trivial error 2016-08-31 14:02:41 +02:00
Ondrej Zajicek (work)
f9f2e280ea KRT: Forbid path merging on BSD
We support ECMP routes only on Linux. Exported routes are checked in
krt_capable(), but a route generated during path merging avoids this
check.
2016-08-30 12:43:46 +02:00
Ondřej Surý
33d22f0e9e whitespace fixes 2016-08-16 09:24:12 +02:00
Ondrej Zajicek (work)
f0b822a831 Log: Fix error handling of debug file open
Logging is not yet initialized, we have to use fprintf() here.

Thanks to Pavel Tvrdik for noticing and debugging it.
2016-07-11 20:22:55 +02:00
Pavel Tvrdík
8f01879c56 cppcheck: fix va_end() functions 2016-06-27 15:07:50 +02:00
Jan Moskyto Matejka
9dbcb11cb5 Unix IO: Tried to fix strange behavior after POLLHUP or POLLERR. 2016-05-30 14:28:22 +02:00
Pavel Tvrdik
8e433d6a52 Prog Doc: Complete several missing parameters 2016-05-12 15:49:44 +02:00
Pavel Tvrdik
f7a99acb4e Initialize variable ifr in sk_setup()
==00:00:00:02.831 2468== Syscall param socketcall.setsockopt(optval) points to uninitialised byte(s)
==00:00:00:02.831 2468==    at 0x513BDEA: setsockopt (in /usr/lib/libc-2.23.so)
==00:00:00:02.831 2468==    by 0x45C7AF: sk_setup (io.c:1216)
==00:00:00:02.831 2468==    by 0x45CDFF: sk_open (io.c:1417)
==00:00:00:02.831 2468==    by 0x44B562: rip_open_socket (packets.c:740)
==00:00:00:02.831 2468==    by 0x4481A7: rip_iface_locked (rip.c:616)
==00:00:00:02.831 2468==    by 0x4133E4: olock_run_event (locks.c:177)
==00:00:00:02.831 2468==    by 0x45A6DE: ev_run (event.c:85)
==00:00:00:02.831 2468==    by 0x45A7AD: ev_run_list (event.c:142)
==00:00:00:02.831 2468==    by 0x45E0FC: io_loop (io.c:2066)
==00:00:00:02.831 2468==    by 0x463B56: main (main.c:845)
==00:00:00:02.831 2468==  Address 0xffefffd24 is on thread 1's stack
==00:00:00:02.831 2468==  in frame #1, created by sk_setup (io.c:1188)
==00:00:00:02.831 2468==  Uninitialised value was created by a stack allocation
==00:00:00:02.831 2468==    at 0x45C6BB: sk_setup (io.c:1188)
2016-05-03 11:02:48 +02:00
Ondrej Zajicek (work)
a7baa09862 BSD: Add the IPsec SA/SP database entries control
Add code for manipulation with TCP-MD5 keys in the IPsec SA/SP database
at FreeBSD systems. Now, BGP MD5 authentication (RFC 2385) keys are
handled automatically on both Linux and FreeBSD.

Based on patches from Pavel Tvrdik.
2016-04-13 14:37:09 +02:00
Ondrej Zajicek (work)
f2ae2badff Main: Add local option
Add option that changes default paths for config file and control socket
to the current working directory.
2016-04-07 12:39:49 +02:00
Ondrej Zajicek (work)
bd22d7f41d IO: Avoid multiple event cycles in one loop cycle.
Event cycle may took too much time and trigger next timer events, so
avoid cycling between timer and event cycles inside the loop cycle.
2016-04-06 11:57:28 +02:00
Ondrej Zajicek (work)
9e7b3ebdf9 IO: Replace RX priority heuristic with explicit mark
In BIRD, RX has lower priority than TX with the exception of RX from
control socket. The patch replaces heuristic based on socket type with
explicit mark and uses it for both control socket and BGP session waiting
to be established.

This should avoid an issue when during heavy load, outgoing connection
could connect (TX event), send open, but then failed to receive OPEN /
establish in time, not sending notifications between and therefore
got hold timer expired error from the neighbor immediately after it
finally established the connection.
2016-04-06 11:49:34 +02:00
Ondrej Zajicek (work)
e86cfd41d9 KRT: Fix route learn scan when route changed
When a kernel route changed, function krt_learn_scan() noticed that and
replaced the route in internal kernel FIB, but after that, function
krt_learn_prune() failed to propagate the new route to the nest, because
it confused the new route with the (removed) old best route and decided
that the best route did not changed.

Wow, the original code (and the bug) is almost 17 years old.
2016-04-06 11:46:25 +02:00
Jan Moskyto Matejka
ea0a8be2ff IO/Poll: fix mistaken variable merge
The events variable is used in the short loop decision. The reasons are
not much clear, keeping this to keep the former behaviour.
2016-03-30 16:21:32 +02:00
Jan Moskyto Matejka
9c92f69272 Unix: Substituted select -> poll also in congestion checker
It does strange things when even one fd larger than FD_SETSIZE is
passed to select().
2016-03-18 11:47:13 +01:00
Jan Moskyto Matejka
fd926ed4ee Poll: Prevent the improbable case of EAGAIN after POLLIN 2016-03-15 14:57:49 +01:00
Jan Moskyto Matejka
e1c13a5a7b Unix: Rework of select-loop to poll-loop
This should lift the limit of FD_SETSIZE and allow more than 1024 fd's.
FD_SETSIZE limit doesn't matter now when creating new sockets.
2016-03-11 12:45:10 +01:00
Ondrej Zajicek (work)
c2106b674c Unix: Fix bug in syslog name handling
Pointer to current_log_name has to be changed even if the name is the
same, because the old one will be invalid/freed after reconfiguration.
2016-02-11 21:53:55 +01:00
Ondrej Zajicek (work)
1e4891e48e Nest: Fix bug in device proto
If an interface address notification is received during device protocol
shutdown/restart, BIRD crashed.

Thanks to Wei Huang for the bugreport.
2015-11-23 11:13:40 +01:00
Jan Moskyto Matejka
9ddbfbddf8 Netlink: Allow more than 256 routing tables.
Since 2.6.19, the netlink API defines RTA_TABLE routing attribute to
allow 32-bit routing table IDs. Using this attribute to index routing
tables at Linux, instead of 8-bit rtm_table field.
2015-11-11 11:40:49 +01:00
Ondrej Zajicek (work)
9b9a7143c4 Conf: Fixes bug in symbol lookup during reconfiguration
Symbol lookup by cf_find_symbol() not only did the lookup but also added
new void symbols allocated from cfg_mem linpool, which gets broken when
lookups are done outside of config parsing, which may lead to crashes
during reconfiguration.

The patch separates lookup-only cf_find_symbol() and config-modifying
cf_get_symbol(), while the later is called only during parsing. Also
new_config and cfg_mem global variables are NULLed outside of parsing.
2015-11-09 00:42:02 +01:00
Ondrej Zajicek (work)
3aed0a6ff7 IO: Fix the previous bugfix
I should check it after making some trivial changes. The original patch
from Alexander has it right.
2015-11-03 11:27:27 +01:00
Ondrej Zajicek (work)
338f85ca77 IO: Handle fd values too big for select()
If the number of sockets is too much for select(), we should at least
handle it with proper error messages and reject new sockets instead of
breaking the event loop.

Thanks to Alexander V. Chernikov for the patch.
2015-11-03 11:08:57 +01:00
Ondrej Zajicek
8d9eef1771 BGP multipath support
Kernel option 'merge paths' allows to merge routes exported to kernel
protocol (currently BGP and static routes) to multipath routes.
2015-06-08 02:24:08 +02:00
Ondrej Zajicek
78a2cc289f KRT: Fixes some minor bugs in kernel protocol 2015-06-08 02:24:08 +02:00
Pavel Tvrdík
ae80a2de95 unsigned [int] -> uint 2015-06-08 02:24:08 +02:00
Ondrej Zajicek
9fdf9d29b6 KRT: Add support for plenty of kernel route metrics
Linux kernel route metrics (RTA_METRICS netlink route attribute) are
represented and accessible as new route attributes:

krt_mtu, krt_window, krt_rtt, krt_rttvar, krt_sstresh, krt_cwnd, krt_advmss,
krt_reordering, krt_hoplimit, krt_initcwnd, krt_rto_min, krt_initrwnd,
krt_quickack, krt_lock_mtu, krt_lock_window, krt_lock_rtt, krt_lock_rttvar,
krt_lock_sstresh, krt_lock_cwnd, krt_lock_advmss, krt_lock_reordering,
krt_lock_hoplimit, krt_lock_rto_min, krt_feature_ecn, krt_feature_allfrag
2015-05-12 16:42:22 +02:00
Ondrej Zajicek
7069fc9e72 KRT: Fixes route reload
Did not really worked
2015-04-25 21:41:43 +02:00
Ondrej Zajicek
c5ff44a703 KRT: Fixes learning of preferred kernel routes.
When a new route was imported from kernel and chosen as preferred, then
the old best route was propagated as a withdraw to the kernel protocol.
Under some circumstances such withdraw propagated to the BSD kernel could
remove the new alien route and thus reverting the import.
2015-04-25 20:43:43 +02:00
Ondrej Zajicek
b867a87c2f Fixes port range socket option 2015-04-19 00:31:59 +02:00
Ondrej Zajicek
9aed29e605 BGP: Enhanced route refresh (RFC 7313) support
Also hook feed_done is renamed to feed_end.
2015-03-29 18:29:49 +02:00
Ondrej Zajicek
af454f9b7c Fixes bug in debug dumps
Using 'dump sockets' in IPv6 mode caused crash due to mismatched format string.

Thanks to Pavel Tvrdik for noticing it.
2015-03-02 09:42:44 +01:00
Ondrej Zajicek
8bcb5fb1e8 Implement latency tracking, internal event log and watchdog 2015-03-02 09:41:14 +01:00
Ondrej Zajicek
9c89560e6c Use IP_PORTRANGE_HIGH for BFD where available 2015-02-22 20:14:14 +01:00
Ondrej Zajicek
2bbc308321 Store protocol config size inside protocol structure
Make proto_config_new() use this info instead of supplied size.

Thanks to Alexander V. Chernikov for the patch.
2015-02-21 21:08:23 +01:00
Pavel Tvrdik
e598853e68 Add const to a param msg at functions log_msg, log_rl, die, bug and debug 2015-02-21 19:32:57 +01:00