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The CMakeLists files are now properly indented.
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The new RIB is implemented as a tree with doubly linked nodes (parents
keep a link to each child, each child keeps a link to its parent). An
index is kept in a btree using CRC32 hashes of the path name in the
RIB. Nodes keep an SHA3-256 hash value that is unique for the entire
subtree. This allows quick checks to see if two RIB subtrees are in
sync. The event system for the RIB is based on the event system for
flows (fqueue), but implemented completely in dynamic memory using
linked lists. An initial test is performed for the RIB. This PR does
not modify existing code to use the new RIB.
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Adds an implementation of B-trees of order k (k children, min fill is
k/2, max fill k - 1). Useful to implement indexes for faster lookups.
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Test the SHA3 function with known hashes.
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This adds a hash table that takes 64-bit integers as key and uses
separate chaining on collision. It also adds the PDU Forwarding
Function, which the Flow Manager can use to lookup the fd towards the
next hop. Routing policies will add/update/remove entries in the PFF.
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Fixes #3
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The test had a synchronisation issue. Due to rebuild of the shm_du_map
for random access, there was also a hack in the shm_du_map
specifically to run this test. Because of this hack, the decision was
made to drop this test.
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Updated tests. Added code to drop a corner case (packet where the tail
PCI would cross the edge of the ring buffer) because solving this very
rare case is not worth the performance hit on the ringbuffer the extra
code would incur. This means the ringbuffer might drop a very small
percentage of packets.
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The shared memory map will allow passing SDU's between IPCPs
efficiently. It is a single block of managed memory. SDU's are stored
in a shm_du_buff datastructure, which is a list of blocks inside the
shared memory region. The mechanism for passing SDU's is not yet
implemented and could be either within the region or using another
local IPC mechanism.
The following things are configured at compile time:
SHM_FILE_NAME : the name. Default is "ouroboros_du_map".
SHM_DU_BUFF_BLOCK_SIZE: size of a block inside the shared memory
region. Default is the pagesize of the system.
SHM_DU_MAP_SIZE : the approximate size in bytes of the shared
memory map. The actual filesize may differ by
a small margin. Default is 4MB.
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This adds a test for the bitmap. During the testing I also removed
some bugs that were present in the bitmap implementation.
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Tests should have "_test.c" appended and include the source they are
testing. The build system will find it in the parent directory.
Removed linked_list example test as it is now useless.
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tests/du_buff.c: tests the du_buff_t structure by creating different
size du_buff_t's and filling it with different size
sdu's at different locations in the du_buff_t
tests/CMakefile.txt: added du_buff test
lib/du_buff.c: fixed unsafe #define adding brackets
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This adds a build target 'check', which executes a test suite for
every daemon/library. Every test suite consists of a test driver that
executes a function in a file with the same name as the function. The
compile_debug script executes the 'check' target to validate there are
no regressions. Packaging is also fixed and the prototype can be
shipped as a tarball.
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