lib: Replace shim IPCPs with points of attachment

Removes the UDP and Ethernet shim IPCPs. The unicast and broadcast
IPCPs can now directly attach to a "legacy" socket. We adopt Saltzer's
Point-of-Attachment terminology, also advocated in Day's "Patterns in
Network Architecture". The "poa" component manages these
PoA's with one management thread, one link monitoring thread and one
thread per attached point.

For Ethernet PoA's the irm connect and enroll can resolve the
destination IPCP or Layer name with a broadcast name query over the
attached PoAs (first reply wins). UDP PoA's require a destination IP
address or FQDN.

attach to a local endpoint (required both server and client side):

 irm ipcp poa attach name a udp 10.0.0.1
 irm ipcp poa attach name a udp 10.0.0.1:3435
 irm ipcp poa attach name a udp [::1]:3435
 irm ipcp poa attach name a eth dev eth0
 irm ipcp poa attach name a eth dev eth0 ethertype 0xA000

release a PoA (refused while it carries a flow):

 irm ipcp poa detach name a udp 10.0.0.1:3435
 irm ipcp poa detach name a eth eth0

list an IPCP's PoAs:

 irm ipcp poa list name a

connect to a peer, by name or at an address:

 irm ipcp connect name b dst a
 irm ipcp connect name b dst a eth
 irm ipcp connect name b dst a eth dev eth0
 irm ipcp connect name b dst a udp 10.0.0.1:3435
 irm ipcp connect name b dst a udp peer.example.com:3435

disconnect by peer name, no address:

 irm ipcp disconnect name b dst a
 irm ipcp disconnect name b dst a component mgmt

enroll has the same shape as connect:

 irm ipcp enroll name b layer lr autobind
 irm ipcp enroll name b layer lr autobind eth dev eth0
 irm ipcp enroll name b layer lr autobind udp 10.0.0.1:3435

the IRMd config file attaches PoAs and names peers the same way:

 udp = [ "10.0.0.1", "10.0.0.1:3436" ]
 eth = [ "eth0", {dev="eth1", ethertype=0xA007} ]

 enrol={dst="LAN", eth={dev="eth0"}}
 conn=[{dst="lan3", eth={}}, {dst="lan4", udp="10.0.0.1:3435"}]

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 58 insertions, 0 deletions

diff --git a/cmake/config/lib/common.cmake b/cmake/config/lib/common.cmake
new file mode 100644
index 00000000..ebdc3196
--- /dev/null
+++ b/cmake/config/lib/common.cmake
@@ -0,0 +1,58 @@
+# Library configuration options for Ouroboros Options affecting libouroboros-common,
+# libouroboros-dev and libouroboros-irm as a whole; per-subsystem options sit beside this file
+
+# Flow limits
+set(SYS_MAX_FLOWS 10240 CACHE STRING
+  "Maximum number of total flows for this system")
+set(PROC_MAX_FLOWS 4096 CACHE STRING
+  "Maximum number of flows in an application")
+set(PROC_RES_FDS 64 CACHE STRING
+  "Number of reserved flow descriptors per application")
+set(PROC_MAX_FQUEUES 32 CACHE STRING
+  "Maximum number of flow sets per application")
+
+# Threading
+if(NOT APPLE)
+  set(PTHREAD_COND_CLOCK "CLOCK_MONOTONIC" CACHE STRING
+    "Clock to use for condition variable timing")
+else()
+  set(PTHREAD_COND_CLOCK "CLOCK_REALTIME" CACHE INTERNAL
+    "Clock to use for condition variable timing")
+endif()
+
+# Timeouts
+set(SOCKET_TIMEOUT 500 CACHE STRING
+  "Default timeout for responses from IPCPs (ms)")
+
+# QoS settings
+set(QOS_DISABLE_CRC TRUE CACHE BOOL
+  "Ignores ber setting on all QoS cubes")
+
+include(utils/CPUUtils)
+detect_pclmul()
+detect_pmull()
+if(HAVE_PCLMUL)
+  message(STATUS "CRC-64/NVMe backend: PCLMUL (x86 SSE4.1+PCLMUL)")
+elseif(HAVE_PMULL)
+  message(STATUS "CRC-64/NVMe backend: PMULL (aarch64 crypto)")
+else()
+  message(STATUS "CRC-64/NVMe backend: byte table (no acceleration)")
+endif()
+
+# Thread pool manager (TPM) debugging
+set(TPM_DEBUG_REPORT_INTERVAL 0 CACHE STRING
+  "Interval at wich the TPM will report long running threads (s), 0 disables")
+set(TPM_DEBUG_ABORT_TIMEOUT 0 CACHE STRING
+  "TPM abort process after a thread reaches this timeout (s), 0 disables")
+
+# Flow statistics (requires FUSE)
+if(HAVE_FUSE)
+  set(PROC_FLOW_STATS TRUE CACHE BOOL
+    "Enable flow statistics tracking for application flows")
+  if(PROC_FLOW_STATS)
+    message(STATUS "Application flow statistics enabled")
+  else()
+    message(STATUS "Application flow statistics disabled")
+  endif()
+endif()
+