ouroboros/include, branch 0.8

lib, tools: Rename application process and instance

2017-12-02T13:56:20+00:00

This refactors ouroboros to use "program" instead of "application process" and "process" instead of "application process instance" to align with current naming in current Operating Systems courses instead of the ISO nomenclature adopted by RINA. This change permeates through the entire implementation. Also contains some minor other refactors. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

build: Fix detection of python for swig bindings

2017-11-10T14:30:51+00:00

The cmake build only looked for the libraries but not the interpreter, which caused the build to fail if the library was present, but the interpreter was not installed and executable using the "python" command. The build now looks for the python interpreter as well. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Use packed struct for FRCT header access

2017-11-08T20:40:28+00:00

This replaces the variable FRCT header with a packed struct, which significantly simplifies the implementation. The shm_du_buff calls to release the head/tail are updated to return a pointer to the original head or the new tail (in symmetry to the alloc calls, which return a pointer to the new head and old tail), so that it immediately points to the structure that is needed. The frct_pci sources are removed and frct is now fully in the frct.c source file. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Refactor FRCT implementation

2017-11-07T10:22:45+00:00

The frct_pci and rq headers are moved from include/ouroboros to src/lib since they are only needed in the library. FRCT is moved to its own source file. FRCT takes the application PDUs, encapsulates and processes them and hands them back. This makes it easier to disable FRCT should the application want to write to a "raw" flow. An FRCT instance is now allocated upon alloc and released upon dealloc. The FRCT data structure is split into a sender and receiver connection record. Setting a new configuration will now be done upon sending the next data PDU, which will flag the DRF for a new run and use that configuration. This avoids some issues should packets arrive out-of-order, and simplifies setting a configuration. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

dev: Split nonblocking read and write

2017-10-30T12:54:02+00:00

The FLOWFNONBLOCK flag now has two subflags FLOWFRNOBLOCK and FLOWFWNOBLOCK which allows setting the behavior of read and write independently. The default behavior is unchanged (blocking read and write). Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Deprecate ouroboros_init and ourboros_fini

2017-10-14T11:19:10+00:00

This commit deprecates ouroboros_init and ouroboros_fini and adds them as a constructor or destructor, causing these function to be run automatically when a program that links to the library calls and exits main(). For this to fully work, the library had to be split so that we can avoid the irmd calling these functions (the IRMd has to create the shm structures on which these calls depend). The library is split in 3 parts: libouroboros-dev, libouroboros-irm and libouroboros-common. The latter is linked to the other two so that including libouroboros-dev or libouroboros-irm will also link libouroboros-common.

lib: Cancel tpm threads instead of marking exit

2017-09-30T15:58:18+00:00

This makes the threadpool use pthread_cancel instead of setting an exit flag that threadpool managed threads check periodically. This drastically reduces CPU consumption in the irmd when running a lot of applications. It requires cancellation handlers in the ipcp and irmd to be implemented to ensure safe cancellation during operation and shutdown.

ipcpd: normal: Add Loop-Free Alternates routing

2017-09-29T13:12:36+00:00

This adds the Loop-Free Alternates (LFA) policy. In case a link goes down a LFA may be selected to route the SDUs on without causing loops instead of the main hop that just went down.

ipcpd: Add threadpool manager to DHT

2017-09-24T12:34:03+00:00

This adds a threadpool manager to the DHT. This was needed because the detached thread could cause a data race on shutdown. The threadpool manager is revised to allow multiple instances in a single program. The irmd and ipcp now store commands in a buffer (list) instead of a single buffer before passing it to handler threads.

lib: Clean up bitmap implementation

2017-09-23T10:32:07+00:00

There was a return -1 in the allocate call which is unsafe since -1 may be a valid id in the bitmap. Since it's a data structure for internal use, I replaced the NULL checks with assertions.