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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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lib: Add missing check upon garbage collection
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lib: Fixed incorrect comparison
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There was a check missing upon garbage collection. If the whole DU map
has been used once, all DUs will have their garbage bit set to
one. This meant that the garbage collector would keep moving the tail
indefinitely.
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When moving the tail pointer in the DU map, blocks was never reset to
zero. This caused it to sometimes clean up too many DUs.
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irmd: fixed bad locks
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lib: Add missing modulo calculation
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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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lib: dev: small locking improvements
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This avoids holding the long locks during accept() and alloc_res()
calls. Small reduction of time of other locks held. No changes in
locking logic.
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irmd: new locking implementation
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unlock is now called before the object is destroyed.
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This locking should be more consistent, It now has three locks, one
guarding flows and port_id's, one guarding the registered apps and
ipcps, and one guarding the overall state of the irmd. There are two
additional mutexes guarding the condition variables.
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ipcpd: shim-udp: Revised locking
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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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lib: dev.c: Revised locking
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fd and flows are now all protected by the flows_lock while the overall
state of the AP is protected by the data_lock.
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lib: allow accepting any flows
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The application can call accept(fd, NULL, NULL);
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lib: cleanup file descriptors for shared memory
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cleanup of file descriptors for the shared memory.
also adds a missing NULL check and some invalidation in dev.c
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ipcpd: Move lock in ipcp_udp_listener
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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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ipcpd: shim-udp: added missing checks
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ipcpd: shim-udp: fixed locking.
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Used simpler pointer arithmetic to calculate the file offset pointers.
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Port_id's weren't correctly released. Also removes remaining debug
logs from the library.
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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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lib: dev.c: added locking
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Locking is required for multi-threaded applications. Flows are locked
separately. Read/Write locks are used for concurrent reads.
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Be udp
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lib: implementation of read/write locks
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lib: shm_ap_rbuff: removed bad memory allocation
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moved a malloc so there is no malloc/free when there is no data to be
read from the shm_ap_rbuff.
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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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Locking the main mutex should happen while the counter is locked.
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This adds read/write locks, allowing for concurrent reads on the locked
datastructure. This is needed for the fast path.
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