It should not happen anyway because no fd should be active if state is
NONE, but still it's an extra check.
Change-Id: I6d58762b7d10078eb8d0981c13d35cb6f85cfe86
Similar to what we do in libosmocore already, we want to
deterministically enable or disable support for the feature without
having into account if the system has a libsctp. If libsctp is missing
and support is enabled, then fail.
Extra checks are also added:
* Check netinet/sctp.h header
* Check libosmocore was built with libsctp support (API
osmo_sock_init2_multiaddr() we require).
* In stream.c make sure it can be built without HAVE_LIBSCTP, and that
set_addrs() fails for more than 1 address (since that feature is only
supported through osmo_sock_init2_multiaddrs()).
Change-Id: I4b3e1f1894f13ac1175a71a5139c02a2633be26d
This API will be later used to set multiple addresses for SCTP sockets.
Depends: libosmocore.git Ic8681d9e093216c99c6bca4be81c31ef83688ed1
Related: OS#3608
Change-Id: I09f0d989f2309abdeb304fe570355abed2cd107b
This API will be later used to set multiple addresses for SCTP sockets.
Depends: libosmocore.git Ic8681d9e093216c99c6bca4be81c31ef83688ed1
Related: OS#3608
Change-Id: I0fe62f518e195db4e34f3b0ad1762bb57ba9d92a
If messages are sent using osmo_stream_cli_send() while the stream
is still (re)connecting, they won't have a chance to be sent until the
stream is connected, and hence they are queued until
CONNECTING->CONNECTED is done. However, at that time
(osmo_stream_cli_fd_cb), the WRITE flag was dropped unconditionally,
which meant already queued packets didn't have the opportunity to be
sent by the same callback until first message is enqueued and WRITE flag
is set (again by osmo_stream_cli_send()).
Let's make them be sent as soon as possible once the connection is
available.
Related: OS#4188
Change-Id: I289495f9aad6389c5f2623fb072d676235b7d24c
This supposed to be variant of osmo_stream_cli_open() with explicit
control over reconnection logic but it's plain broken: doxygen docs
contradict the code, actual reconnection logic is affected by timeout
parameter directly which is set in different function.
It seems like we haven't been affected by this so far because we always
use it in auto-reconnection mode which is triggered by default due to
positive reconnection timeout value (5 sec) automatically used in the
absense of explicitly set timeout.
Looking at commit history, this function already been source of
confusion in the past. Instead of trying to fix this mess, let's just
deprecate it entirely and properly document use of
osmo_stream_cli_set_reconnect_timeout() to control reconnection logic.
The only known user is libosmo-sccp which won't use it as of
0a93a683f3cb8e5977eb4a666ab207db6e7d7af9 commit.
Change-Id: Id988ed0274b363db049f59cbf6a193727c8c3c8a
Previously closing the client did not alter its state, so we might
end-up with a client without any file descriptors, but being in state
STREAM_CLI_STATE_CONNECTED. Fix this inconsistency by setting
appropriate state.
Related issue is that reconnect function, which is always (at least in
the library and examples) called when some problem with the connection
is detected, closed the connection only after checking whether
reconnection is enabled. This might result in another inconsistency
fixed in this patch by moving the check below connection cleanup.
While at it, also move connection close logging to appropriate place:
it's confusing to see logs about connection being closed while in
reality it wasn't even established.
Change-Id: If41ed60bd625488c283d1e8a2b078e640f04c78e
Add functions to get the description of a server link or client
connection which examine data on corresponding socket.
Those functions use static buffers and intended for single use in
log/printf statements as illustarted by corresponding example changes.
Change-Id: If9a8e211da85956781479862a63c4fc6e53ed6be
Introduce logging macro wrapper to properly log current client state and
function to aid in debugging.
Change-Id: Ie22a80dcec95998cce0b25053fdf74f23eab6e53
While we are processing a read event, the connection's
callback might free the connection. Check for this and don't
attempt to process further events on an already freed connection.
Change-Id: I0a9c7d8e3263c73440f7084dbb1792a4ca5038f0
Related: OS#3685
Depends: g#11704 (for libosmo-sccp)
When establishing a client-side stream connection via libosmo-netif,
we must using non-blocking connect if we want to avoid blocking/stalling
the entire process. The libosmocore socket API provides the
OSMO_SOCK_F_NONBLOCK flag for this. Make use of it!
Change-Id: I9bfcb39b5801a36ef32ca0d1f3eb8236687d7ed6
Related: OS#3383
Documentation of osmo_sock_init2 doesn't provide information of any
specific value of errno set/expected after running the function. It is
incorrect to expect a specific value of errno and looking at the
implementation it is actually not a good idea to check it.
If reconnect flag is set, let's reconnect always instead of looking at
errno to decide.
Change-Id: I25b33f4cdc496ae31ff240d445b9b2805091845c
Introduce osmo_stream_srv_set_flush_and_destroy() which marks a
stream to be 'flushed and destroyed'. No new messages will be
received on this stream, and no new messages can be queued.
Once the Tx queue has been drained, the connection is destroyed.
The API user is given a chance to perform cleanup operations
in the closed_cb() callback for the connection.
The same mechanism will be added for client-side connections
in a follow-up patch.
Change-Id: I8ed78fe39c463e9018756700d13ee5ebe003b57f
Related: OS#2789
Suggested-by: Harald Welte
On destroying a client or server stream, deallocate any msgbs that are still
pending in the queue.
In libosmo-sccp, the ss7_test.c in test_as(), messages are queued and were,
before this, left floating after the stream was destroyed, causing a sanitizer
memory leak. This patch fixes the leak.
Depends: Ia291832ca445d4071f0ed9a01730d945ff691cf7 (libosmocore)
Change-Id: Iaad35f03e3bdfabf3ba82b16e563c0a5d1f03639
In previous implementation, if no reconfiguring is needed, a new socket
would be created without closing the old one, leaking the previous
socket. Instead, if we don't need reconfiguring, we return 0 as no
operation is required.
Change-Id: I6c1a7fff63e44840fb5e2bc7ace5e9a61e304987
We didn't check for cases where setsockopt_nodelay() fails. Let's check
for that and bail out + close the socket.
Change-Id: I0adbc4cec35be7c36bdf01d4d8fefd6097e9be5d
Fixes: coverity CID#166970
Enabling sender_dry_event in SCTP_FLAGS breaks reliable delivery of DATA
chunks to the scoket user on Linux. Let's avoid enabling that, while
still enabling various other interesting events.
See https://bugzilla.redhat.com/show_bug.cgi?id=1442784 for all related
details.
Change-Id: Ib616cd07a6044ca2ee7e05093b22df3369c62b56
We were using the wrong variable when setting the SCTP_NODELAY,
resulting in the setsoctkopt() fialing.
Change-Id: Ic04cb8bb5ff41f177f7f5b7f7e2a2ecc686dd4c0
So far we seem to assume that the accept_cb does all handling of socket
fd cleanup. However, there are cases where there is no accept_cb set,
the accept_cb returns error, or an earlier sctp_sock_activate_events()
or the activation of non-blocking mode fails.
For those cases, close the socket and return an error code.
Fixes: CID#57915
Change-Id: I3a3ce9194ab7ca5c1921fc79c2a1c9e10a552cf0
In a659590e29 we fixed endianness issues
with the Stream ID field, but at the same time mistook the PPID field
for 16bits. In reality it is 32bits, and hence our 'htons' is rendering
wrong PPID values.
Change-Id: I1b60523044835ee630dba9a43d26af4f1ebd1ced
Using this function, the user can configure if sockets related to the
respective stream client or server should have the NODELAY socket
option set in order to avoid Nagle algorithm or related algorithms
that may introduce packet delay on the transmitter side.
Change-Id: Ibeb9ba227bab18f7f4f16518c0022c4f003cc8e9
In their infinite wisdom, the inventors of SCTP designed an API (the
sockets API described in RFC6458), where some members are in host byte
order (like the stream identifier), while other members are in network
byte order (like the PPID).
Let's handle this properly (we assumed both are network byte order), and
also use 16-bit htons/ntohs fo the PPID, rather than htonl/ntohl.
Change-Id: I777174ca2915c6de0063db41a745c71b4a09bbec
* when using osmo_*_destroy(), always call *_close() internally to
make sure we don't free memory holding references to sockets that are
still open
* when closing the socket, always make sure to set the fd to -1 in all
cases, to avoid attempts to avoid later close() on a new file using
the same fd number as the socket closed previously.
Change-Id: I29c37da6e8f5be8ab030e68952a8f92add146821
during osmo_*_set_addr(), we must make sure to talloc_free() any old
address before copying in the new address. Not all functions did this,
and those that did implemented it manually. Let's use
osmo_talloc_replace_string() which is exactly intended for this case.
Change-Id: Ie1b140a160c66e8b62c745174865d5ba525cb2c2
This uses the new osmo_sock_init2() features introduced in libosmocore
Change-Id Idab124bcca47872f55311a82d6818aed590965e6 to bind *and*
connect a given socket during creation.
Change-Id: I013f4cc10b26d332d52d231f252bb0f03df8c54b
We should have doxygen documentation for all libosmo-* APIs.
libosmo-netif is currently devoid of any API docs. Let's start with the
stream and datagram socket related functions.
Change-Id: I589a5e60d9df2b8a65fbaf68f80e3ae0039d8c2a
without setting the BSC_FD_* flags prior to reconnection, the re-connect
would happen silently and the client program would not be notified via the
connect_cb().
Change-Id: Iaf8ec8662cf83476eee1b76fa41dc57f063f0ad3
In case the application is using the read-callback and a read returns 0,
then the application itself would want to trigger the reconnect. This
is different from the osmo_stream_cli_recv() case where the reconnect
can be handled internally to the library.
Change-Id: I41314bad4a9f44e8a61b9d2ba33d1a76b25bd145
if osmo_stream_cli_destroy() is called while the reconnect timer is
running, we would end up in a crash.
Change-Id: If6597130f472f1e2b8d9682002250ecd54675bb0
We use the magic value '-1' in case the file descriptor is not yet
initialized. If somebody calls osmo_stream_*_close() before this
changes, we used to crash. Let's check for this and avoid a crash.
Also, after close let's change the fd to -1 again to mark the fd
invalidity.
Change-Id: I3aa04999ab01cb7971ee2dad45dfc31ab4142868
The reconnect behavior was likely broken in commit
de3f57a8293a5b39435d6f283da23e0172bad8bb
If the user requests a re-connect, we should start it. Not only in case
the connection drops later, but also if the initial connection itself
fails.
Change-Id: I817e026404cbd9145cae2ce90bc57a1db1d2e12b
osmo_sock_init() never returns -1 + errno EINPROGRESS. It will return a
positive fd in case the connect operation is in progress. Therefore,
the related code in osmo_stream_cli_open2() was impossible to execute.
Change-Id: Id3483d1d1d4d2eabba94729ea29e5c93b33abff0
Fixes: Coverity CID 57861
When the setsockopt() in sctp_sock_activate_events() indicates an error,
let's print an error message in the log about this.
Change-Id: I5920154e23debe6d01eaa156005db0842f1a18cc
Fixes: Coverity CID 57634
caught by valgrind:
==3150== Syscall param sendmsg(msg.msg_control) points to uninitialised byte(s)
==3150== at 0x60DC0D0: __sendmsg_nocancel (syscall-template.S:81)
==3150== by 0x5DF3413: sctp_send (in /usr/lib/x86_64-linux-gnu/libsctp.so.1.0.16)
==3150== by 0x65AA066: osmo_stream_srv_write (stream.c:540)
So far, when the first connection attempt failed in
osmo_stream_cli_open(), we returned a terminal errro without any
re-connection attempts. While this may be useful in some cases, our
general idea of the stream client logic is to handle the reconnection
attempts insid the library. We introduce a new osmo_stream_cli_open2()
function while keping the old behavior for backwards compatibility.
Pau Espin
Max
Harald Welte
Neels Hofmeyr
Daniel Willmann