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/*++
/* NAME
/* debug_peer 3
/* SUMMARY
/* increase verbose logging for specific peers
/* SYNOPSIS
/* #include <debug_peer.h>
/*
/* void debug_peer_init(void)
/*
/* int peer_debug_check(peer_name, peer_addr)
/* const char *peer_name;
/* const char *peer_addr;
/*
/* void debug_peer_restore()
/* DESCRIPTION
/* This module implements increased verbose logging for specific
/* network peers.
/*
/* The \fIdebug_peer_list\fR configuration parameter
/* specifies what peers receive this special treatment; see
/* namadr_list(3) for a description of the matching process.
/*
/* The \fIdebug_peer_level\fR configuration parameter specifies
/* by what amount the verbose logging level should increase when
/* a peer is listed in \fIdebug_peer_list\fR.
/*
/* debug_peer_init() performs initializations that must be
/* performed once at the start of the program.
/*
/* debug_peer_check() increases the verbose logging level when the
/* client name or address matches the debug_peer_list pattern.
/* The result is non-zero when the noise leven was increased.
/*
/* debug_peer_restore() restores the verbose logging level.
/* This routine has no effect when debug_peer_check() had no
/* effect; this routine can safely be called multiple times.
/* DIAGNOSTICS
/* Panic: interface violations.
/* Fatal errors: unable to access a peer_list file; invalid
/* peer_list pattern; invalid verbosity level increment.
/* SEE ALSO
/* msg(3) the msg_verbose variable
/* namadr_list(3) match host by name or by address
/* CONFIG PARAMETERS
/* debug_peer_list, patterns as described in namadr_list(3)
/* debug_peer_level, verbose logging level
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
/* Utility library. */
#include <msg.h>
/* Global library. */
#include <mail_params.h>
#include <namadr_list.h>
#include <debug_peer.h>
#include <match_parent_style.h>
/* Application-specific. */
#define UNUSED_SAVED_LEVEL (-1)
static NAMADR_LIST *debug_peer_list;
static int saved_level = UNUSED_SAVED_LEVEL;
/* debug_peer_init - initialize */
void debug_peer_init(void)
{
const char *myname = "debug_peer_init";
/*
* Sanity check.
*/
if (debug_peer_list)
msg_panic("%s: repeated call", myname);
if (var_debug_peer_list == 0)
msg_panic("%s: uninitialized %s", myname, VAR_DEBUG_PEER_LIST);
if (var_debug_peer_level <= 0)
msg_fatal("%s: %s <= 0", myname, VAR_DEBUG_PEER_LEVEL);
/*
* Finally.
*/
if (*var_debug_peer_list)
debug_peer_list =
namadr_list_init(VAR_DEBUG_PEER_LIST, MATCH_FLAG_RETURN
| match_parent_style(VAR_DEBUG_PEER_LIST),
var_debug_peer_list);
}
/* debug_peer_check - see if this peer needs verbose logging */
int debug_peer_check(const char *name, const char *addr)
{
/*
* Crank up the noise when this peer is listed.
*/
if (debug_peer_list != 0
&& saved_level == UNUSED_SAVED_LEVEL
&& namadr_list_match(debug_peer_list, name, addr) != 0) {
saved_level = msg_verbose;
msg_verbose += var_debug_peer_level;
return (1);
}
return (0);
}
/* debug_peer_restore - restore logging level */
void debug_peer_restore(void)
{
if (saved_level != UNUSED_SAVED_LEVEL) {
msg_verbose = saved_level;
saved_level = UNUSED_SAVED_LEVEL;
}
}
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