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The installation prefix was taking a trailing backslash, while it is
common not to do so. Fixed it so that any trailing backslash is
removed by the compilation and installation scripts.
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Functionality that was previously thought to be part of the DIF
Allocator is actually namespace management. Hence the file has been
renamed and the API updated.
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This adds error numbers specificly for Ouroboros. It also refactors
some of the header files that are installed.
Fixes #2
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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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This sets the correct install directories for all the binaries,
library and header files. It also sets the right permissions on the
sockets and shared memory so that regular users can also use the
ouroboros library. Root privileges are required to run the irmd.
Fixes #7
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Unlock missing when compiled without DNS support.
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Adds a thread that cleans up stale pending flows. Compile time option
IRMD_FLOW_TIMEOUT allows setting the timeout period. Default timeout is
5 seconds. The thread wakes up 20 times per period to check the
flows.
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The ipcpds didn't unlock the flows lock when the dst_name is
unbeknownst to the IRMd.
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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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The source AP name was still present in the protobuf message the
shim-eth-llc uses.
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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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Now correctly deallocates the local fd if the remote already
deallocated the flow.
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The registration function has been moved to the irm tool, applications
now need to be registered by an administrator. Currently only supports
one instance per registered name, and an AP can be registered under
only one name.
The irmd can now start a registered server application on demand.
For the full functionality of the tool, execute "irm register".
AP name removed from flow allocation. Flow allocation does not send
the source ap name as it is quite useless. The accept() call now only
returns the AE name.
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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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When the ring buffer is empty, a read call will sleep. A write call on
an empty ring buffer will wake up sleeping readers.
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This stops IPC processes from hanging due to bad locks. It first
informs all threads that the IPCP is shutting down, then cancels all
threads. Cancellation is still required because threads may be in
accept() or receivefrom().
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This introduces an IPC process that relays data between two local AP's
over the shm_du_map. Only configuration it has is a DIF name.
It required small modification elsewhere:
lib: added support for the IPCP_LOCAL type
irm: added support for the IPCP_LOCAL type
dif_config: added the IPCP_LOCAL type
tools: added support for the IPCP_LOCAL type
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The shim UDP did a non-blocking write call, causing loss of
SDU's. This has been changed to a blocking write call.
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In linux, the select call changes the timeout variable to the time not
spent in sleep, causing the timeout to decrease and that loop to grind
the cpu. The timeval is now reset to the correct value every loop.
Also removed a LOG_ERR message that was hampering performance.
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This adds a cleanup handler for the main message loop, which closes
the socket upon pthread_cancel so that the ipcp can exit cleanly.
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Conf was not checked on bootstrap.
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This removes an install command from the build, since the protobuf
header file was being installed in the source directory.
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The shim UDP now supports deallocating a flow end-to-end. Contains
some stability fixes for flow allocation and some missing close()
calls in lib/sockets.
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There could be a theoretical race condition that the server sends a
message before the FD is set on the client side, which is resolved.
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There were two race conditions. The first was where client received
the response message before the client UDP port was connected to the
server UDP port and the first message of the client was sent to the
LISTEN port instead of the server application port. This was solved by
reordering the operations so the response is sent after the port is
correctly connected. The second race condition is that the FD is not
added to the set in time at the server side before the first SDU
arrives. This was solved by adding a variable proteceted by a mutex.
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some debug code for locking and a sleep check are removed from the
shim-udp.
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It uses UDP port 0x0D1F on all hosts to send and receive flow
allocation messages. It supports communication between server and
client AP over a single shim IPCP.
Implementation of full flow deallocation is pending. Both the client
and the server still have to call flow_dealloc();
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Adds a missing modulo calculation that would result in index -1 being
returned instead of zero when the ringbuffer skipped back to the
beginning.
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Simplified locking to take only two locks: the first lock guards the
state of the ipcp. This lock must be held for writing on bootstrap and
closing, and held for reading during all other operations. The second
lock guards operations on flows, and must be held for writing during
allocation and deallocation, and held for reading when sending sdu's.
After adding a fd to FD_SET, the shim will wait for 1 ms to ensure
that the FD is added to the select call.
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This takes a lock before notifying the IRMd of a new flow request, to
avoid race conditions when trying to retrieve the fd by port-id.
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The fd_to_port_id function has no internal locking and must now be
called under lock.
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lib, ipcpd, irmd: Add QoS cube definition
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This fixes wrong header inclusion that would make programs which are
not developed within ouroboros fail upon compilation, since they would
not find certain headers on their system.
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This adds the QoS cube definition, which is an enum to select which
QoS is needed in the IPCP. An application has to use the qos_spec in
qos.h to define what it needs. The IRMd will map this unto a qos cube
definition.
Some headers are now also no longer installed on the system, since
they are only to be used within the irmd and ipcps.
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Added necessary locks for the shim-udp. This PR also improves thread
management, the main thread now starts a mainloop thread, which spawns
sdu handler threads when it the IPCP is enrolled. If the IPCP exits
the enrolled state, the sdu loop is cancelled.
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The shim_udp now correctly destroys its ringbuffer on exit. Now
handles sdu's in a single thread using select() with a 10 us timeout.
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A value that was unitialized was being treated as an error in the
release build with gcc.
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