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This adds the MSG_DONTWAIT flag to the send function of the
shim-eth-llc, when using PF_PACKET. Previously the send would return
only after the frame was sent, resulting in poor performance.
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This will notify the IRMd when the IPCP is initialized and ready to
receive messages. Previously a bootstrap could fail since the IPCP was
not listening to the socket yet.
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This changes the amount of time the shim-eth-llc will hold the IPCP
state lock when sending and receiving frames. Before it was holding
the lock for too long.
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This adds the functionality of exchanging the static DIF information
between 2 DIF members. After exchange the enrollment is stopped, and
the IPCP that initiated enrollment transitions to the enrolled state.
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The entry from the ringbuffer was never freed, causing memleak per SDU.
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ipcp-data was not correctly destroyed.
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Blocking I/O now uses condition variables in the shared memory instead
of busy waiting. Timeouts can be specified. This requires the size of
the rbuffs and du_map to be the same, to guarantee that when the
shm_du_map is not full, the ap_rbuffs can't be full either.
Added the timeout option to the flow for future use.
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It seems like drivers are setting the Ethernet length field wrong when
sending an LLC message. The LLC shim now writes the payload length in
the frame to circumvent the wrong information from the driver.
Also fixes deallocation.
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Various portability fixes for FreeBSD. POSIX requires shm file names
to start with a "/" to be portable. lseek(2) can be undefined on
POSIX shm, replaced with ftruncate(2). IRMd check on existing lockfile
more portable.
FreeBSD 11.0 is preferred as it natively supports robust mutexes.
Full working LLC implementation pending.
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Upon receipt of a frame, the minimum of the length reported in the
frame and the frame length reported by kernel is taken. Some device
drivers change the length in the frame. Some others add padding,
making the length reported by the kernel too high. This is a lousy
workaround to make it work on as many systems as possible.
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All includes of <errno.h> within ouroboros are replaced with the
ouroboros errno.
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IRMd and ipcps will now close the logfile upon exit.
Also corrects exit(1) to exit(EXIT_FAILURE) and exit(0) to
exit(EXIT_SUCCESS).
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Writing output to log files is now enabled by default. Logs are
written to <INSTALL_PREFIX>/var/log/ouroboros, which is created on
install. There is a log file for the irmd and one per IPCP. To still
get (colored) output on stdout, provide the --stdout switch when
starting the irmd.
Fixes #17
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When an application closes the shm_du_map, it will clean all remaining
sdu's for that application. Adds a function to clean the shm_du_map on
close.
Fixes #20.
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This PR enhances the shared memory providing recovery if a process
crashes. It adds a SHM_DU_TIMEOUT_MICROS variable, setting an
expiration time for SDU's when shared memory is full. If an
application doesn't read a blocking SDU within this time, the shared
memory will be cleansed of all SDU's for this application and the
application's rbuff will be cleared.
Some refactoring of the API's. Fixed wrong pthread checks in IRMd.
Fixes #13
Fixes #14
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Changes the variable name as well to API instead of PID.
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This changes the IRM API after discussions with Dimitri. The register
operation is now split into a bind and register operation. The same
for unregister; unbind and unregister. PIDs are now used as the
application instance name. A name for a PID is only provided for
scriptability in bash. It is therefore also no longer passed down to
the IPCP. Every operation on an IPCP through the IRM API has to use
the PID. Quering of the PIDs by name is possible. The IRM tool has
been updated to use this new API as well. A subcommand 'ipcp' has been
added for operations that take effect on IPCPs only.
Fixes #12
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Update to POSIX 200112L to allow use of robust mutexes in the
shm_du_map. Removed the implementation of the rw_lock in favor of
pthread_rwlock_t.
Placeholder for the shm_du_map_sanitize function.
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This adds the RX_RING and TX_RING socket options to the shim-eth-llc
for faster transmission and reception. On systems where these options
are not available the old method of sending and receiving is
used. Further optimization would be creating and assigning a
read/write thread per CPU core, but that becomes very platform
specific, and is not required in the short term.
Fixes #10
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The shim Ethernet with LLC was using the frame length in the header of
the 802.3 frame, which contained a wrong value when sent over the
wire. Probably the kernel filled in a wrong value. Now it uses the
length as reported by recv.
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This removes the source AP name from all shim-eth-llc flow allocation
operations, since it was removed from flow allocation by 6271d09bd.
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This addresses some comments Dimitri had on the shim Ethernet with
LLC.
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This adds a shim over LLC over Ethernet. It uses the raw socket API to
send messages directly over an interface.
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