Add support osmo_io operations resembling sendmsg() and recvmsg() socket
operations. This is what will enable the implementation of higher-layer
functions like equivalents of sctp_recvmsg() and sctp_send() in
libosmo-netif and/or other users.
Change-Id: I89eb519b22d21011d61a7855b2364bc3c295df82
Related: OS#5751
This relocation is necessary as the backend (osmo_io_fd or
osmo_io_uring) requires a different approach in handling connect
notifications. As a result, a function call has been introduced to
struct iofd_backend_ops.
In a subsequent patch, the process for the osmo_io_uring backend will
be modified to handle SCTP connect notifications using poll/select.
If connect notification is requested using poll/select, the file
descriptior must be registered to osmo_fd, using osmo_fd_register. If
read / write notification is requested by application, the file
descriptior must be registered also. A flag is used prevent calling
osmo_fd_register / osmo_fd_unregister multiple times, which would cause
a crash.
Change-Id: I905ec85210570aff8addadfc9603335d04eb057a
Related: OS#5751
The two functions of the SCTP socket interface we use in osmo-* are
sctp_send() and sctp_recvmsg(). We do not use sctp_sendmsg() at all,
so let's make sure the mode is named correctly.
Change-Id: Ie2d1c7ce6f211dbe025a0e843ad733443102ea15
Related: OS#5751
Avoid uninitialized read, found with valgrind
Syscall param recvmsg(msg) points to uninitialised byte(s)
at 0x49FD865: __recvmsg_syscall (recvmsg.c:27)
by 0x49FD865: recvmsg (recvmsg.c:41)
by 0x4891FAE: iofd_poll_ofd_cb_recvmsg_sendmsg (osmo_io_poll.c:66)
by 0x48921B2: iofd_poll_ofd_cb_dispatch (osmo_io_poll.c:119)
by 0x48941F1: poll_disp_fds (select.c:419)
by 0x4894299: _osmo_select_main (select.c:457)
by 0x4894304: osmo_select_main (select.c:496)
by 0x10DC3E: test_segm_ipa_stream_srv_run (stream_test.c:628)
by 0x10E2A5: main (stream_test.c:879)
Address 0x1ffefffa68 is on thread 1's stack
in frame #1, created by iofd_poll_ofd_cb_recvmsg_sendmsg (osmo_io_poll.c:45)
Change-Id: I21114ad57784126cfdeb4a932ed44dbf23946fbe
libosmo-netif does a non blocking connect(), which as per definition of
the socket API is signalled from the OS to the user by marking the file
descriptor writable.
osmo_io needs to signal this somehow. Previously osmo_io would only call
the write_cb if actual data has been sent. This patch changes the behaviour
so that calling osmo_iofd_write_enable() will call write_cb() on a writable
socket even if the write queue is empty.
Change-Id: I893cbc3becd5e125f2f06b3654578aed0aacadf3
* make backend configurable for later
* segmentation callback for chunked streams
* logging target for osmo_io
* support partial writes
Change-Id: I50d73cf550d6ce8154bf827bf47408131cf5b0a0
Related: SYS#5094, OS#5751
Harald Welte
Andreas Eversberg
Daniel Willmann