ipcpd: Use capacity queue estimation for mb-ecn

The mb-ecn algorithm was using rbuff queue depths in packets to mark,
but sockets in the poa component report capacity in bytes. The tx
rings are now adaptive to block on queuing delay instead of when full
to prevent buffer bloat, controllable via fccntl (FLOWSTXQDLY and
FLOWGTXQDLY).

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

1 files changed, 1 insertions, 15 deletions

diff --git a/src/ipcpd/unicast/cap.h b/src/ipcpd/unicast/cap.h
index df8c2ec1..ca6b6355 100644
--- a/src/ipcpd/unicast/cap.h
+++ b/src/ipcpd/unicast/cap.h
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2026
  *
- * Link capacity estimation
+ * Link capacity codes
  *
  *    Dimitri Staessens <dimitri@ouroboros.rocks>
  *    Sander Vrijders   <sander@ouroboros.rocks>
@@ -23,22 +23,8 @@
 #ifndef OUROBOROS_IPCPD_UNICAST_CAP_H
 #define OUROBOROS_IPCPD_UNICAST_CAP_H
 
-#include <stddef.h>
 #include <stdint.h>
 
-int      cap_init(void);
-
-void     cap_fini(void);
-
-/* Account an egress packet; qlen is sampled before the write. */
-void     cap_update(int    fd,
-                    size_t qlen,
-                    size_t len);
-
-uint8_t  cap_get(int fd);
-
-void     cap_reset(int fd);
-
 /* Quarter-log2 capacity code: ~2^(c / 4) bytes/s, 0 = unknown. */
 uint8_t  cap_enc(uint64_t rate);