Forwarding to the DCCP mailing list ---------- Forwarded message ---------- From: Huszák Árpád <huszak@xxxxxxxxxx> Date: 8 December 2010 13:39 Subject: DCCP - sysctl sequence window To: acme@xxxxxxxxxxxx, acme@xxxxxxxxxxxxxxxx, ian.mcdonald@xxxxxxxxxxx Dear Arnaldo and Ian, According to RFC4340 "The maximum valid Sequence Window value is Wmax = 2^46 - 1 = 70368744177663", however I could set the sequence window size to this value using linux kernel 2.6.36. I tried to do this with the command: sudo sysctl -w net.dccp.default.seq_window=70368744177663 and also by modifying /proc/sys/net/dccp/default/seq_window file. The maximum value of the seq_window I could set was 2^32-1 (4294967295). I found the reason of this malfunction in feat.h: 106 extern unsigned long sysctl_dccp_sequence_window; and feat.c: 30 unsigned long sysctl_dccp_sequence_window __read_mostly = 100; The maximum of an unsigned long variable is 2^32-1 (4294967295). Best regards, Arpad -- --------------------------------------------------------------------- Árpád HUSZÁK, Ph.D. assistant professor Tel: +36 1 463-2076 Budapest University of Technology and Economics +36 70 514-5925 Department of Telecommunications, I.E.432 www.hit.bme.hu/~huszak --------------------------------------------------------------------- -- To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
