The ifi_change field can be set with the mask of the flags that need
to be changed as part of the link message to the kernel. This means only
the specific flags that have been changed will be modified in the kernel,
rather than the entire flags entry.
[thaller@redhat.com: add capability to indicate the change in behavior]
https://github.com/thom311/libnl/pull/86
If recvmsg indicates that the message read was truncated libnl retries
to read the complete message after increasing the message buffer. This
only works if the message flags MSG_PEEK | MSG_TRUNC are set. If
NL_MSG_PEEK is not enabled on the nl_sock structure, flags are left
empty and the rest of the truncated message is discarded, hence a
subsequent recvmsg returns the next message (in case of a multipart
message, the NLMSG_DONE) is read and returned.
This patch aborts message processing if the message was truncated and
the NL_MSG_PEEK flags was not activated for the nl_sock structure.
http://lists.infradead.org/pipermail/libnl/2015-June/001888.html
[thaller@redhat.com: add NL_CAPABILITY_NL_RECV_FAIL_TRUNK_NO_PEEK]
Signed-off-by: Thomas Egerer <hakke_007@gmx.de>
Signed-off-by: Thomas Haller <thaller@redhat.com>
Also reserve a range of capabilities (0x7000 to 0x7FFF) that we won't
use upstream. Add a macro NL_CAPABILITY_IS_USER_RESERVED() to check
if the capability is in that range.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Including linux/if.h in netlink/route/link.h causes issues
in cases where libnl is used in conjuntion with other third
party libraries that include net/if.h. Seems to be a long
checkered history of symbol collisions between these two
files. As it turns out, including linux/if.h from within
netlink/route/link.h is actually unecessary. I resurrected
a forgotten path from this thread:
http://lists.infradead.org/pipermail/libnl/2012-April/000525.html
By removing the include as the patch suggests we can get
around the nuissance of the symbol collisions.
https://github.com/thom311/libnl/pull/73
Signed-off-by: Thomas Haller <thaller@redhat.com>
This is based on the patch by sagil@infinidat.com, but heavily modified.
Add a function nl_socket_set_fd(), I renamed it from nl_connect_fd().
Now nl_connect() and nl_socket_set_fd() are implemented independently as
they share little code. But they have similar functionality:
to initialize a libnl socket and set it's file descriptor.
A user who wants libnl to setup the socket can continue to use nl_connect().
A user with special requirements should setup the socket entirely. That includes
calling socket() (with or without SOCK_CLOEXEC), bind(), setting buffer size.
For the same reason I dropped nl_create_fd(). It didn't do much more then
calling socket() -- which the user can do directly.
https://github.com/thom311/libnl/pull/68
Signed-off-by: Thomas Haller <thaller@redhat.com>
- Added option to create socket (fd) without bind.
It is now possible to forward the socket fd to another child process...
...later use nl_connect_fd() to connect to socket from the child process.
- Added option to disable CLOEXEC even if defined (in socket.h)
'nl_socket_enable_cloexec' & 'nl_socket_disable_cloexec'
No change to current default behavior.
Signed-off-by: Sagi Lowenhardt <sagil@infinidat.com>
This patch changes the signatures of some functions to allow const pointers in
places where a const qualified pointer is enough access for what the function
does (e.g. nla_get_u8). It also changes some functions that take a pointer
parameter and return a pointer derived from it to use the strchr idiom.
This is not exhaustive in terms of places where const can be added, but it's
a decent chunk that should not make the external api any more restrictive.
http://lists.infradead.org/pipermail/libnl/2015-February/001826.html
Signed-off-by: Rohan Joyce <rojoyce.github@gmail.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
[thaller@redhat.com: add symbols to libnl-route-3.sym]
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
[thaller@redhat.com: changed whitespace and libnl-route.sym]
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
Indicate this change of behavior with the capability
NL_CAPABILITY_ROUTE_ADDR_COMPARE_CACHEINFO.
This is a behavioral change as we now consider an additional
field when comparing addresses.
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
Older kernels without patch a3d1289126e7b14307074b76bf1677015ea5036f do
not support rtnl_getlink() by ifname. Detect this situation and fail
with -NLE_OPNOTSUPP instead of -NLE_INVAL.
This changes behavior in returning a different error code for this
case.
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
nl_pickup() converts error codes from netlink into
nl error codes using nl_syserr2nlerr(). The latter function
mangles different error codes to the same nl error code.
Add a new function, that returns both the nl error code
and the original error code.
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
These values mirror TCP_* socket states from 'netinit/tcp.h'.
There is no good reason to expose a copy of those values.
User space should use the original values (if they care).
The only value that is actually useful is IDIAGNL_SS_ALL.
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
IDIAG_ATTR_* were a copy of the INET_DIAG_* extension kernel
flags. Redefining them is wrong, user space should continue
to use the values provided via the kernel headers.
Also they were misused as change flags (ce_mask), which they are not.
Deprecate the IDIAG_ATTR_* flags and redefine them to what the
originally are: INET_DIAG_*.
Also deprecated idiagnl_attrs2str() because there is already
idiagnl_exts2str(). idiagnl_attrs2str() in the sense of libnl change
flags (ce_mask) makes no sense.
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This internal structure should never have been exposed publically.
It as introduced as public API in v3.2.23.
For now, don't remove it as it would be an API/ABI break.
Fixes: 81d2b1d509
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
When we test idiag on 3.4 kernel, we always get ERANGE.
This is because libnl has its own copy for SK_MEMINFO_*,
which is actually newer than 3.4, where SK_MEMINFO_VARS
is larger than kernel's.
We add a copy from latest kernel, so on older kernel
libnl should still compile. Note, for kernel < 3.6
we don't have SK_MEMINFO_BACKLOG, we have to relax
the minlen.
'sock_diag.h' comes from v3.17 kernel sources
(bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9), file
'include/uapi/linux/sock_diag.h'.
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
The cache pickup does a check for duplicates for some time now.
However, the pickup in nl_cache_refill() explicitely clears the
cache, so the pickup doesn't need to actually do the dupe check,
as uniqueness is already guaranteed be Netlink subsystem.
And avoiding the dup check is beneficitial for performance
reasons, as the current algorithm is O(n^2).
http://lists.infradead.org/pipermail/libnl/2014-October/001680.html
Fixes: 96bb7c9a4c
Signed-off-by: Holger Eitzenberger <holger@eitzenberger.org>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
- whitespace
- fix newline and whitespace in output of u32_dump_details()
- let rtnl_u32_del_mark() clear U32_ATTR_MARK
Signed-off-by: Thomas Haller <thaller@redhat.com>
... to be able to return a negative error code for unknown modes.
[thaller@redhat.com: This is potentially an ABI break, but since
the size of the enum is implementation defined, it seems
anyway unstable to have them as function arguments/return values.]
http://lists.infradead.org/pipermail/libnl/2014-August/001616.html
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Thomas Haller <thaller@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
strlen() returns a size_t type, but nla_put accepts an int only. This
breaks a -Werror build of applications using libnl, so avoid this
warning by explicitly casting the length to an int.
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This patch adds support for ip6 tunnel that works with
the ip6_tunnel kernel module.
Signed-off-by: Susant Sahani <susant@redhat.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This patch adds support for IFLA_VLAN_PROTOCOL
Signed-off-by: Susant Sahani <susant@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
[thaller@redhat.com: minor fixes (whitespace, documentation, and a typo)]
Signed-off-by: Thomas Haller <thaller@redhat.com>
It can easily happen that the generated local netlink port is alrady in
use. In that case bind will fail with ADDRINUSE.
Users of libnl3 could workaround this, by managing the local ports
themselves, but sometimes these users are libraries too and they also
don't know which ports might be used by other components.
This patch changes that nl_socket_alloc() no longer initilizes the local
port id immediately. Instead it will be initialized when the user calls
nl_socket_get_local_port() the first time and thereby shows interest in
the value.
If bind() fails with ADDRINUSE, check if the user ever cared about the
local port, i.e. whether the local port is still unset. If it is still
unset, assume that libnl should choose a suitable port and retry until
an unused port can be found.
Signed-off-by: Thomas Haller <thaller@redhat.com>
This patch introduces sit tunnel support
Signed-off-by: Susant Sahani <susant@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
[thaller@redhat.com: change WS to TAB, fix code doc]
Signed-off-by: Thomas Haller <thaller@redhat.com>
This patch introduces gre tunnel support
Signed-off-by: Susant Sahani <susant@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
[thaller@redhat.com: change WS to TAB, fix code doc]
Signed-off-by: Thomas Haller <thaller@redhat.com>
This patch introduces ipip tunnel support. This
works with kernel module ipip.
Signed-off-by: Susant Sahani <susant@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
[thaller@redhat.com: change WS to TAB, fix code doc]
Signed-off-by: Thomas Haller <thaller@redhat.com>
