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-rw-r--r--src/global/debug_peer.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/src/global/debug_peer.c b/src/global/debug_peer.c
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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;
+ }
+}