cvs commit: src/sys/netinet tcp.h tcp_input.c tcp_subr.c tcp_var.h

[Andre Oppermann]

andre       2007-05-18 19:58:37 UTC

  FreeBSD src repository

  Modified files:
    sys/netinet          tcp.h tcp_input.c tcp_subr.c tcp_var.h 
  Log:
  Add tcp_log_addrs() function to generate and standardized TCP log line
  for use thoughout the tcp subsystem.
  
  It is IPv4 and IPv6 aware creates a line in the following format:
  
   "TCP: [1.2.3.4]:50332 to [1.2.3.4]:80 tcpflags <RST>"
  
  A "\n" is not included at the end.  The caller is supposed to add
  further information after the standard tcp log header.
  
  The function returns a NUL terminated string which the caller has
  to free(s, M_TCPLOG) after use.  All memory allocation is done
  with M_NOWAIT and the return value may be NULL in memory shortage
  situations.
  
  Either struct in_conninfo || (struct tcphdr && (struct ip || struct
  ip6_hdr) have to be supplied.
  
  Due to ip[6].h header inclusion limitations and ordering issues the
  struct ip and struct ip6_hdr parameters have to be casted and passed
  as void * pointers.
  
  tcp_log_addrs(struct in_conninfo *inc, struct tcphdr *th, void *ip4hdr,
      void *ip6hdr)
  
  Usage example:
  
   struct ip *ip;
   char *tcplog;
  
   if (tcplog = tcp_log_addrs(NULL, th, (void *)ip, NULL)) {
          log(LOG_DEBUG, "%s; %s: Connection attempt to closed port\n",
              tcplog, __func__);
          free(s, M_TCPLOG);
   }
  
  Revision  Changes    Path
  1.38      +1 -0      src/sys/netinet/tcp.h
  1.352     +8 -22     src/sys/netinet/tcp_input.c
  1.284     +89 -0     src/sys/netinet/tcp_subr.c
  1.151     +3 -0      src/sys/netinet/tcp_var.h