1 files changed, 54 insertions, 0 deletions
diff --git a/src/ipcpd/unicast/cap.h b/src/ipcpd/unicast/cap.h
new file mode 100644
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+++ b/src/ipcpd/unicast/cap.h
@@ -0,0 +1,54 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2026
+ *
+ * Link capacity estimation
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#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);
+
+uint64_t cap_dec(uint8_t c);
+
+uint8_t  cap_min(uint8_t a,
+                 uint8_t b);
+
+/* MIN-combine the own link code into the PCI byte. */
+void     cap_stamp(uint8_t * pci,
+                   uint8_t   own);
+
+#endif /* OUROBOROS_IPCPD_UNICAST_CAP_H */