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

[Andre Oppermann]

Andre Oppermann wrote:
> 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);

Oops, free(tcplog, M_TCPLOG) obviously.

-- 
Andre