Added packet checksumming code. Watch the comments for an explanation.

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/checksum.h b/lib/checksum.h
new file mode 100644
index 0000000..8151554
--- /dev/null
+++ b/lib/checksum.h
@@ -0,0 +1,20 @@
+/*
+ *	BIRD Library -- IP One-Complement Checksum
+ *
+ *	(c) 1999 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_CHECKSUM_H_
+#define _BIRD_CHECKSUM_H_
+
+/*
+ *	Both checksumming functions accept a vararg list of packet
+ *	fragments finished by NULL pointer.
+ */
+
+int ipsum_verify(void *frag, unsigned len, ...);
+u16 ipsum_calculate(void *frag, unsigned len, ...);
+
+#endif