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| author | Dimitri Staessens <dimitri@ouroboros.rocks> | 2026-06-24 12:32:33 +0200 |
|---|---|---|
| committer | Sander Vrijders <sander@ouroboros.rocks> | 2026-06-29 08:33:00 +0200 |
| commit | c59a6d54d6361298018edb021d2da818a6b5f09a (patch) | |
| tree | 37626b3502fbf2f6576cf522485b040944a436d6 /cmake/config/lib.cmake | |
| parent | 451afac626648a4aa534f1dec0f318231dfd8874 (diff) | |
| download | ouroboros-c59a6d54d6361298018edb021d2da818a6b5f09a.tar.gz ouroboros-c59a6d54d6361298018edb021d2da818a6b5f09a.zip | |
build: Make re-key watermark configurablebe
KEY_REKEY_WM_CHECK_BITS now controls the watermark check, once per 2^n
flow writes (FLOW_WM_CHECK in dev.c). Now the configuration check
(check watermark < outstanding packets) is contained in lib.cmake
instead of assuming the value of FLOW_WM_CHECK.
Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
Diffstat (limited to 'cmake/config/lib.cmake')
| -rw-r--r-- | cmake/config/lib.cmake | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/cmake/config/lib.cmake b/cmake/config/lib.cmake index 2c01b311..81a7d6ba 100644 --- a/cmake/config/lib.cmake +++ b/cmake/config/lib.cmake @@ -97,6 +97,8 @@ set(KEY_REKEY_WATERMARK 4 CACHE STRING "Re-key when this many node keys remain; 0 disables the count trigger") set(KEY_REPLAY_WINDOW 2048 CACHE STRING "RX replay window in packets; power of two, >= 128") +set(KEY_REKEY_WM_CHECK_BITS 16 CACHE STRING + "Re-key watermark is consulted once per 2^n flow writes") if(NOT KEY_REPLAY_WINDOW MATCHES "^[0-9]+$") message(FATAL_ERROR "KEY_REPLAY_WINDOW must be a positive integer") endif() @@ -111,7 +113,7 @@ endif() # that leaves a high-rate flow no room to complete the exchange. Production # defaults are vast; this guards under-sized (test) geometries. if(KEY_REKEY_WATERMARK GREATER 0) - set(_rk_wm_check 65536) # FLOW_WM_CHECK in src/lib/dev.c (2^16) + math(EXPR _rk_wm_check "1 << ${KEY_REKEY_WM_CHECK_BITS}") math(EXPR _rk_lead "${KEY_REKEY_WATERMARK} << (${KEY_LEAF_BITS} + ${KEY_NODE_BITS})") math(EXPR _rk_min "2 * ${_rk_wm_check}") |