Introduces the functions genl_register_family() and
genl_unregister_family() to register a Generic Netlink family
which does not implement a cachable type.
API users can direct received messages into genl_handle_msg() which
will validate the messages and call the callback functions defined
in the commands definition.
See test/test-genl.c for an example on how to use it.
These functions deprecate the function genlmsg_data() which did not
allow to specify the length of the user header. Use of the new API
will make code much clearer. The old function is still kept around
for backwards compatibility but marked deprecated in the API reference.
The HTB implementation in libnl uses units of microseconds in a number
of places where it seems TC is expecting time in units of ticks, which
causes actual rates much higher than requested. Additionally, libnl
uses USER_HZ for calculating buffer and cbuffer sizes, which can
result in much larger buffers than necessary on systems with high
resolution timers.
Note that the TBF qdisc uses microseconds incorrectly in two spots as
well, I fixed this but did not test.
The fw classifier allows a mask to be set, which is necessary for some
complex shaping/firewall scenarios. The attached patch adds support
for it to libnl.
Attached is a patch to fix two problems with dumping objects to a buffer in=
stead of a file descriptor.
One was a problem in detecting the end of the buffer in the newline code.
The other was a problem with clearing the whole buffer before printing each=
object.
Hello,
libnl 3.2.9 does not build with musl libc, without patching.
I' using a current musl libc (http://www.etalabs.net/musl/)
with linux 2.6.32 headers.
At first there were a couple problems on the musl side, but those are
resolved.
However, I found some other issues:
First, two files were missing
#include <byteswap.h>:
lib/netfilter/log_msg.c
lib/netfilter/queue_msg.c
These files used __bswap_64 (which should be bswap_64), a macro
declared in byteswap.h
Second, I got this error after fixing that:
In file included from nf-queue.c:16:
./include/linux/netfilter.h:53: error: field in has incomplete type
./include/linux/netfilter.h:54: error: field in6 has incomplete type
I found that src/nf-queue.c is missing an
#include <netinet/in.h>
Attached is a patch which resolves these issues. I've tested with both
musl and glibc, and it builds cleanly on both.
- changes the modules hierarchy to better represent the set of libaries
- list the header file that needs to be included
- remove examples/doc from api ref that is included in the guide
- add references to the guide
- fix doxygen api linking for version 1.8.0
- readd doxygen mainpage to config file
- fix a couple of doxygen doc bugs
I found a minor bug in __str2flags where empty strings or short strings
will match all or many flags respectively. Basically the test needs to
ensure the test string is the same length as the table entry before
doing a strncasecmp to avoid doing just a prefix test.
Adds a new section to netlink fundamentals explaining the common
addressing use cases and illustrates kernel->user, user->user,
and user->kernel communication.
Adds --enable-doc/--disable-doc, if omitted doc will only be build
if requirements are met. If explicitely enabled, configure script
will fail if requirements are not met.
Apparently the change to have nl_recvmsgs() return the number of
parsed messages broke nl_wait_for_ack() among other applications.
This patch reverts to the old behaviour and provides a new function
nl_recvmsgs_report() which provides the additional information for
use by the cache manager and possibly other applications.
Reported-by: Scott Bonar <sbonar@cradlepoint.com>
Signed-off-by: Thomas Graf <tgraf@redhat.com>
Let the user specify a list of cache types to add to the manager
as arguments instead of adding a static list.
Uses the newly added nl_cache_mngr_info() to constantly print
information about the manager.
Having nl_recvmsgs() return the number of read messages allows
to continue reading until the underlying recvmsg() will return
EAGAIN for the non blocking socket.
The reallocated part of the enlarged association array was left
uninitialized which would have resulted in trying to free random
pointers.
This was a theoretical bug because it wasn't possible to register
more than 32 cache types since no netlink family supports that
many individual cache types.
Nevertheless this patch fixes the bug and also reduces the default
size of the allocation table and expandations a bit to reduce the
memory footprint slightly.
The requirement to have the caller provide the socket does not
make much sense. Automatically allocate the socket if none was
provided.
This may also avoid some future abuse of reusing request sockets
for handling notifications.
Also rename cm_handle to cm_sock for clarity (no API change)
Instead, clone it and modify a temporary copy. Although it is not
recommended to use the same socket for requests and to serve a
cache manager, this change might prevent some unwanted side effects
if done so.
I'm using libnl in a program which I give to valgrind
in order to track memory errors / leaks. When my program
exits, it complains about non-freed memory, allocated in
3 places in classid.c, at lines 280, 284 and 289.
It seems related to the module's constructor classid_init
which allocates resources, with no destructor to free it.
The attached patch tries to fix this issue by registering
a destructor which performs the tree liberation at exit.
I found a small bug in libnl, about extended table id ( above 256 ).
Signed-off-by: Romary Sonrier <romary@sonrier.com>
Signed-off-by: Thomas Graf <tgraf@redhat.com>
The function can be used to make a copy of an existing cache. It is very
similar to nl_cache_subset() except that it allows no filtering but
copies every object.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Thomas Graf <tgraf@redhat.com>
