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This will simplify the CDAP API. Now the opcode has to be given when
sending a CDAP request. Before a separate operation was provided since
some of the function parameters are unused for certain commands.
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ipcpd: normal: Add policy for obtaining a flat address
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This adds a policy for obtaining a flat address, and thus also the
infrastructure for policies in the IPCP. The IPCP should check if the
address is available; this is currently not there yet.
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All calls for opening rbuffs are now concentrated on the dev side.
This allows some simplifications in the np1 calls. The ipcp_fini call
will not destroy the mutex associated with the state, since the final
state needs to be checked before shutting down an IPCP.
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The steps for flow deallocation have been further refined. An
operation ipcp_flow_fini() which wait for all SDUs to be read from a
flow has been added. The shim IPCPs and the local IPCP have been
adapted to this new API.
Deallocation messages have been removed from the shim IPCPs, since
there is insufficient state synchronisation between them to make this
work reliably.
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ipcpd: Add threadpool for main loop
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This adds a threadpool for the main loop of the IPCPs. Before there
was a single thread handling each request, which could result in
starvation since performing name queries at the same time as enrolling
a normal IPCP was impossible.
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Deallocation was reverted to a synchronoous operation between the AP,
IRMd and IPCP in order to avoid inconsistent states of the port_id.
Fixes some memory leaks, particularly the shm_flow_set is now closed
upon deallocation.
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This has the code checked with -Wcast-qual and -Wconversion flags.
These flags were removed because SWIG generated code fails.
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This stabilises flow allocation now that the rbuffs are created upon
flow allocation. Only the IRMd can sync this process sufficiently.
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The fast path will now use an incoming ring buffer per flow per
process. This necessitated the development of a new method for the
asynchronous io call, which is now based on an event queue system for
scalability (fqueue). The ipcpd's and tools have been updated to this
API.
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This will allow to finalize deallocating flows until all SDUs have
been processed. Read and write calls will now block when a flow was
deallocated. Replaces NULL checks in the fast path with asserts.
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The struct flow_set can now be accessed in applications as flow_set_t.
Fixes some malformed lines and homogenizes output when receiving bad
SDUs in the oping tool.
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Flow deallocation from the application will immediately return (void
call). The IRMd will not send a reply message.
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The SDU's were not correctly removed upon shutdown, peek should be
pop.
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IPCPs can now use ap_init() to initialize the memory. All flows are
accessed using flow descriptors, this greatly simplifies IPCP
development. Reverts the fast path to a single ap_rbuff per process.
Splits lib/ipcp into irmd/ipcp and lib/ipcp-dev. Adds a lib/shim-dev
holding tailored functions for shims. Moves the buffer_t to utils.h.
Fixes the shim-eth-llc length field. Removes the flow from shared.h.
Fixes #4
Fixes #5
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ipcpd: normal: Add operations to get and set the PCI
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This adds the operations needed in the normal IPCP to get and set the
Protocol Control Information. It allows to allocate or release space
in the current DU. The struct pci can be serialized into newly
allocate space. Vice versa, a struct pci can be deserialized given a
DU. It allows for decreasing the TTL in the DU and for calculating the
CRC32. The TTL and CRC32 can now be selected when creating a new DIF.
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The flow_select call now takes as a parameter a flow_set_t, which
specifies a set of flow descriptors that will unblock the select call
when an SDU for one of them arrives. The select call has been moved to
its own header.
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lib: Add northbound ringbuffers
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Fast path is split in north and southbound paths.
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lib: ipcp: Decouple flow_dealloc
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Sending a dealloc to the irmd moved to its own call.
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build: Add correct include directory for swig
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The correct include directory was not added to the CMakeLists in the
wrap directory. Before it was working since the headers were already
installed system-wide on my own system.
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The head and tail alloc and release operations were taking an int to
identify the idx instead of a ssize_t. The size was a ssize_t instead
of a size_t.
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Disables robust mutexes and clock attributes for condition variables
for compatibility with OSX (SUSv2). Implements clock_gettime and adds
some defines for OSX compatibility in time_utils.
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The shm_du_map is renamed to shm_rdrbuff to reflect the Random
Deletion Ringbuffer used in the implementation. The close_on_exit call
is removed and SDUs are cleaned up by the application in the ap_fini()
call. This required a non-blocking peek() operation in the shm_ap_rbuff.
Some initial implementation for future support of qos cubes has been
added to the shm_rdrbuff.
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The state lock was reverted to an rwlock to avoid interference of
management functions with the fast path. IPCPs now close without
calling unsafe functions in the signal handler.
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Location-dependent names should be managed by a higher-level NMS.
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The complete data model inside the IRMd has been restructured. The
bind operation was revised to allow binding of AP and AP instances and
register those names with different DIFs (see "irm bind" for details).
Server applications require to call ap_init with a server name
argument, client application that do not the be reachable over any DIF
can call ap_init(NULL). Calling ap_init for a client with a specified
name will not have adverse consequences for the application, but will
consume unnecessary resources in the IRMd.
Application servers can now be started at any point after the IRMd has
been started. Starting servers, binding AP names and registering names in
DIFs can be performed in any order that does not defy temporal logic.
Supports naming instances by their pid. In case of IPCP Instances
created with the IRM tool, the name assigned during "irm ipcp create"
can be used.
All the changes required updates in the tools.
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This adds a condition variable with a timeout to the CDAP request so
that we can respond correctly to the answer from the remote. It also
adds a timeout to the condition variable waiting on completion of
enrollment. Furthermore, for every CDAP callback a new thread is now
spawned, to avoid deadlocking in case a callback is stuck.
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This adds SWIG to the build and wraps the Ouroboros library so that it
can be called through Python scripts. If either SWIG or Python cannot
be found, no bindings are generated.
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lib, irmd: Bind AP instances to AP_subsets
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This call will allow grouping AP instances of a certain AP together
which are configured identically. Adds the bind operation to dev and
updates the applications to make use of this call. Flow_alloc is now
only called with the pid and doesn't send the apn anymore.
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This will add a timeout to the socket so that a process won't be
blocked by the actions of the process with which it is communicating
over the socket.
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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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Threads from the threadpool will now check the state of the IRMd and
exit gracefully without a need to cancel them. This avoids the unsafe
call of pthread_cancel in the signal handler.
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Fix missing set of api upon flow_alloc.
Various locking fixes.
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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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Sometimes the POSIX version was not set in source files. This caused
the compiler to not find the timespec struct, since we are using C89.
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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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This adds a flow_select() call that will sleep until an SDU can be
read on a flow. It returns the file descriptor for which an SDU is
ready. It takes as optional argument a timespec struct to specify a
timeout.
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Be enrolment
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