cvs commit: src/sys/netinet in_pcb.c in_pcb.h ip_input.c ip_var.h

Mike Silbersack silby at
Sat Jan 1 17:50:58 PST 2005

silby       2005-01-02 01:50:57 UTC

  FreeBSD src repository

  Modified files:
    sys/netinet          in_pcb.c in_pcb.h ip_input.c ip_var.h 
  Port randomization leads to extremely fast port reuse at high
  connection rates, which is causing problems for some users.
  To retain the security advantage of random ports and ensure
  correct operation for high connection rate users, disable
  port randomization during periods of high connection rates.
  Whenever the connection rate exceeds randomcps (10 by default),
  randomization will be disabled for randomtime (45 by default)
  seconds.  These thresholds may be tuned via sysctl.
  Many thanks to Igor Sysoev, who proved the necessity of this
  change and tested many preliminary versions of the patch.
  MFC After:      20 seconds
  Revision  Changes    Path
  1.157     +52 -4     src/sys/netinet/in_pcb.c
  1.79      +2 -0      src/sys/netinet/in_pcb.h
  1.293     +14 -0     src/sys/netinet/ip_input.c
  1.93      +1 -0      src/sys/netinet/ip_var.h

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