nsock_log.c

/***************************************************************************
 * nsock_log.c -- nsock logging infrastructure.                            *
 *                                                                         *
 ***********************IMPORTANT NSOCK LICENSE TERMS***********************
 *                                                                         *
 * The nsock parallel socket event library is (C) 1999-2013 Insecure.Com   *
 * LLC This library is free software; you may redistribute and/or          *
 * modify it under the terms of the GNU General Public License as          *
 * published by the Free Software Foundation; Version 2.  This guarantees  *
 * your right to use, modify, and redistribute this software under certain *
 * conditions.  If this license is unacceptable to you, Insecure.Com LLC   *
 * may be willing to sell alternative licenses (contact                    *
 * sales@insecure.com ).                                                   *
 *                                                                         *
 * As a special exception to the GPL terms, Insecure.Com LLC grants        *
 * permission to link the code of this program with any version of the     *
 * OpenSSL library which is distributed under a license identical to that  *
 * listed in the included docs/licenses/OpenSSL.txt file, and distribute   *
 * linked combinations including the two. You must obey the GNU GPL in all *
 * respects for all of the code used other than OpenSSL.  If you modify    *
 * this file, you may extend this exception to your version of the file,   *
 * but you are not obligated to do so.                                     *
 *                                                                         *
 * If you received these files with a written license agreement stating    *
 * terms other than the (GPL) terms above, then that alternative license   *
 * agreement takes precedence over this comment.                           *
 *                                                                         *
 * Source is provided to this software because we believe users have a     *
 * right to know exactly what a program is going to do before they run it. *
 * This also allows you to audit the software for security holes (none     *
 * have been found so far).                                                *
 *                                                                         *
 * Source code also allows you to port Nmap to new platforms, fix bugs,    *
 * and add new features.  You are highly encouraged to send your changes   *
 * to the dev@nmap.org mailing list for possible incorporation into the    *
 * main distribution.  By sending these changes to Fyodor or one of the    *
 * Insecure.Org development mailing lists, or checking them into the Nmap  *
 * source code repository, it is understood (unless you specify otherwise) *
 * that you are offering the Nmap Project (Insecure.Com LLC) the           *
 * unlimited, non-exclusive right to reuse, modify, and relicense the      *
 * code.  Nmap will always be available Open Source, but this is important *
 * because the inability to relicense code has caused devastating problems *
 * for other Free Software projects (such as KDE and NASM).  We also       *
 * occasionally relicense the code to third parties as discussed above.    *
 * If you wish to specify special license conditions of your               *
 * contributions, just say so when you send them.                          *
 *                                                                         *
 * This program is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of              *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU       *
 * General Public License v2.0 for more details                            *
 * (http://www.gnu.org/licenses/gpl-2.0.html).                             *
 *                                                                         *
 ***************************************************************************/

/* $Id$ */


#define _GNU_SOURCE
#include <stdio.h>

#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>

#include "nsock_internal.h"
#include "nsock_log.h"

extern struct timeval nsock_tod;


void nsock_set_log_function(nsock_pool nsp, nsock_logger_t logger) {
  mspool *ms = (mspool *)nsp;

  ms->logger = logger;
  nsock_log_debug(ms, "Registered external logging function: %p", logger);
}

nsock_loglevel_t nsock_get_loglevel(nsock_pool nsp) {
  mspool *ms = (mspool *)nsp;

  return ms->loglevel;
}

void nsock_set_loglevel(nsock_pool nsp, nsock_loglevel_t loglevel) {
  mspool *ms = (mspool *)nsp;

  ms->loglevel = loglevel;
}

void nsock_stderr_logger(nsock_pool nsp, const struct nsock_log_rec *rec) {
  fprintf(stderr, "libnsock %s(): %s\n", rec->func, rec->msg);
}

void __nsock_log_internal(nsock_pool nsp, nsock_loglevel_t loglevel,
                          const char *file, int line, const char *func,
                          const char *format, ...) {
  struct nsock_log_rec rec;
  va_list args;
  int rc;

  va_start(args, format);

  rec.level = loglevel;
  rec.time = nsock_tod;
  rec.file = file;
  rec.line = line;
  rec.func = func;

  rc = vasprintf(&rec.msg, format, args);
  if (rc >= 0) {
    mspool *ms = (mspool *)nsp;

    ms->logger(nsp, &rec);
    free(rec.msg);
  }
  va_end(args);
}