| Commit message (Collapse) | Author | Age | Files | Lines |
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bmp_allocate should be called under lock. Helgrind does not give
warnings anymore during flow allocation.
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This commit adds locking to the IRMd with a single global lock.
It also fixes some issues in cleaning up the daemon.
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Fixes some log messages
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This fixes bad indentation and log messages without a newline in the
echo application.
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A wrong log message was being printed if the bootstrap command was
called with a wrong parameter.
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The initial implementation looped on a nanosleep to wait for an
incoming flow allocation request. This implementation is now corrected
with the necessary locks and the thread sleeps on a condition variable.
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lib/test: removed the test for the shm_du_map
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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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ipcpd-udp: fixed missing close
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caused the shim to run out of file descriptors fast...
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lib: fixed enormous memory leak in shm_ap_rbuff
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thanks Sander ;)
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lib: changed port_id to int
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returning -1 as uint32_t leads to bugs.
also changed types in GPB to sint to use zigzag encoding.
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irmd: flow allocation and fast path
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This better reflects the use as the pid is appended to that name.
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This commit has a first implementation of flow allocation (the "slow
path") and read/write (the "fast path") for ouroboros. It provides
basic but unstable communications over the shared memory.
It required a lot of changes all over the stack, and fixes a number of
previously undetected issues.
This PR still need heavy revision regarding data model, locking and
cleanup.
lib/dev: modifications to the API. It now uses an ap_init() call to
set the AP name and sets the Instance ID to the pid of the process. It
also binds the AP to the shared memory and creates tables for mappings
in the fast path. A call to ap_fini() releases the resources.
lib/shm_ap_rbuff: added ring buffer for data exchange between
processes in the fast path. It passes an index in the shm_du_map.
lib/shm_du_map: rewrote API to work with calls from dev.c. Garbage
collector added. Tests updated to new API.
ipcpd/ipcp-data: removed everything related to flows, as these are
universal for all ap's and kept in ap_data (dev.c), or similar structs
for shim ipcps.
shim-udp: added flow allocator and read/write functions and shm
elements.
irmd: revised data model and structures necessary for flow allocation.
tools: echo updated to new dev.h API.
messaging system was updated to comply with new flow allocation
messages. All exchanges use pid and port_id to bootstrap the fast
path.
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ipcpd: Add registration to DNS server
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This adds support for adding the application name to a BIND DNS server
through the nsupdate utility.
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lib: client-side flow allocation
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flow allocation now propagates on the client side up to the IPCP.
added UNKNOWN_AP and UNKNOWN_AE definitions to dev.h
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ipcpd: Hide IRMd messages and fix formatting
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This abstracts away the IRMd messages by calling the functions from
ipcp.h in the ouroboros library. It also fixes some formatting issues.
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ipcpd: Fix shim-udp-test
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This fixes the shim-udp-test, which was using a non null-terminated
string, which caused it to fail on some systems.
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shim-udp: flow allocation added
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This commits adds the gethostbyname call to resolve the dst_name for a
flow allocation using DNS. The DNS server should be specified using
the method mandated by the system (e.g. added to /etc/resolv.conf).
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ipcp_create now returns the pid of the created process to allow for
more efficient scripting.
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All instance-id's in ouroboros will be set by the system to the pid of
the process associated with this application process instance. This
means that the user has no way to choose the instance id's. Function
calls that assumed manually defined instance id's have been replaced
throughout the system.
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Unregistering ap's now works. An AP now registers/unregisters its AP-I
by sending its AP name and its pid to the IRMd. The IPCPs register
whatevercast names. An AP name is currently mapped on a whatevercast
name represented by the same string literal. The IRMd allows
registration of only one AP-I per AP. A Name Space Management system
is needed in the processing system so we can resolve this completely.
Changing the stack to register whatevercast names required some changes
all over the ipcpd implemented and in the library.
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Initial code for application registration. Specifying "*" will (for
now) register with the first IPCP available in the system. Modified
the echo server not to barf messages on failed accept()
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The shim UDP will listen to incoming SDU's for a flow. If the flow is
FLOW_PENDING, it will set it to FLOW_ALLOCATED on the reception of the
first SDU, and connect() to set the destination server_host:sp.
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fixes comments on 38c4169 (memleaks)
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This implements the API for flow allocation. The shims currently does
the following.
The shim IPCP binds to an interface (IP address) and listens for flow
allocation requests on UDP port 0x0D1F (3359), referenced as the
listen port (lp). It will treat any datagram received on lp as a flow
allocation request.
Upon receiving an allocation request IRM_MSG_CODE__IPCP_FLOW_ALLOC
from the IRMd, the shim IPCP will bind a UDP socket to a port (cp)
allocated by the host OS. From that port it will send a UDP packet
containing the destination ap_name to server_host:lp and wait for a
response.
Upon reception of a packet on server_host:lp, the shim_IPCP creates a
UDP socket for the flow with a port set by the host os (sp), binds to
it and echoes the received datagram back from server_host:sp to
client_host:cp. It will also notify the IRMd of an incoming flow
allocation request IRM_MSG_CODE__IPCP_FLOW_REQ_ARR, with as
src_ap_name ("John Day"). It will get the port_id as a return value
of that message and create a flow with status FLOW_PENDING with that
port_id. If the server responds negatively to the flow allocation
request (i.e. the shim IPCP on the server side receives a
IRM_MSG_CODE__IPCP_FLOW_ALLOC_RESPONSE with a response != 0, it will
delete the pending flow. If response == 0, it will set the status to
FLOW_ALLOCATED.
On the client machine the IPCP will learn sp upon reception of the
echoed datagram. It will then create a flow with the port_id it
received with the message from the IRMd and set it to ALLOCATED.
Pending implementation:
DNS support, this PR only supports local flows on the loopback adapter
127.0.0.1.
A thread to listen for the echoed message, to avoid the
entire IPCP to block when the echoed message is lost.
This PR compiles but is untested pending necessary implementations
elsewhere in the stack.
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ipcpd: fixes in ipcp-data
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deletion of flows was not implemented, renamed to ipcp_data_del_flow
removal of stub for has_flow_s (not needed)
made find_flow public, renamed to ipcp_data_find_flow
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lib: moved flow header and source to ipcpd
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ipcpd: initial IPC processes
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added missing NULL checks
common argument check function for ipcps
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