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nmap_error.cc
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nmap_error.cc
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/***************************************************************************
* nmap_error.cc -- Some simple error handling routines. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
*
* The Nmap Security Scanner is (C) 1996-2024 Nmap Software LLC ("The Nmap
* Project"). Nmap is also a registered trademark of the Nmap Project.
*
* This program is distributed under the terms of the Nmap Public Source
* License (NPSL). The exact license text applying to a particular Nmap
* release or source code control revision is contained in the LICENSE
* file distributed with that version of Nmap or source code control
* revision. More Nmap copyright/legal information is available from
* https://nmap.org/book/man-legal.html, and further information on the
* NPSL license itself can be found at https://nmap.org/npsl/ . This
* header summarizes some key points from the Nmap license, but is no
* substitute for the actual license text.
*
* Nmap is generally free for end users to download and use themselves,
* including commercial use. It is available from https://nmap.org.
*
* The Nmap license generally prohibits companies from using and
* redistributing Nmap in commercial products, but we sell a special Nmap
* OEM Edition with a more permissive license and special features for
* this purpose. See https://nmap.org/oem/
*
* If you have received a written Nmap license agreement or contract
* stating terms other than these (such as an Nmap OEM license), you may
* choose to use and redistribute Nmap under those terms instead.
*
* The official Nmap Windows builds include the Npcap software
* (https://npcap.com) for packet capture and transmission. It is under
* separate license terms which forbid redistribution without special
* permission. So the official Nmap Windows builds may not be redistributed
* without special permission (such as an Nmap OEM license).
*
* 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.
*
* Source code also allows you to port Nmap to new platforms, fix bugs, and
* add new features. You are highly encouraged to submit your changes as a
* Github PR or by email to the [email protected] mailing list for possible
* incorporation into the main distribution. Unless you specify otherwise, it
* is understood that you are offering us very broad rights to use your
* submissions as described in the Nmap Public Source License Contributor
* Agreement. This is important because we fund the project by selling licenses
* with various terms, and also because the inability to relicense code has
* caused devastating problems for other Free Software projects (such as KDE
* and NASM).
*
* The free version of Nmap 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. Warranties,
* indemnification and commercial support are all available through the
* Npcap OEM program--see https://nmap.org/oem/
*
***************************************************************************/
/* $Id$ */
#include "nmap_error.h"
#include "output.h"
#include "NmapOps.h"
#include "xml.h"
#include <errno.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
extern NmapOps o;
#ifdef WIN32
#include <windows.h>
#endif /* WIN32 */
#ifndef HAVE_STRERROR
char *strerror(int errnum) {
static char buf[1024];
sprintf(buf, "your system is too old for strerror of errno %d\n", errnum);
return buf;
}
#endif
void fatal(const char *fmt, ...) {
time_t timep;
struct timeval tv;
va_list ap;
gettimeofday(&tv, NULL);
timep = time(NULL);
va_start(ap, fmt);
log_vwrite(LOG_NORMAL|LOG_STDERR, fmt, ap);
va_end(ap);
log_write(LOG_NORMAL|LOG_STDERR, "\nQUITTING!\n");
if (xml_tag_open())
xml_close_start_tag();
if (!xml_root_written())
xml_start_tag("nmaprun");
/* Close all open XML elements but one. */
while (xml_depth() > 1) {
xml_end_tag();
xml_newline();
}
if (xml_depth() == 1) {
char errbuf[1024];
va_start(ap, fmt);
Vsnprintf(errbuf, sizeof(errbuf), fmt, ap);
va_end(ap);
xml_start_tag("runstats");
print_xml_finished_open(timep, &tv);
xml_attribute("exit", "error");
xml_attribute("errormsg", "%s", errbuf);
xml_close_empty_tag();
print_xml_hosts();
xml_newline();
xml_end_tag(); /* runstats */
xml_newline();
xml_end_tag(); /* nmaprun */
xml_newline();
}
exit(1);
}
void error(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
log_vwrite(LOG_NORMAL|LOG_STDERR, fmt, ap);
va_end(ap);
log_write(LOG_NORMAL|LOG_STDERR , "\n");
return;
}
void pfatal(const char *fmt, ...) {
time_t timep;
struct timeval tv;
va_list ap;
int error_number;
char errbuf[1024], *strerror_s;
#ifdef WIN32
error_number = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error_number, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &strerror_s, 0, NULL);
#else
error_number = errno;
strerror_s = strerror(error_number);
#endif
gettimeofday(&tv, NULL);
timep = time(NULL);
va_start(ap, fmt);
Vsnprintf(errbuf, sizeof(errbuf), fmt, ap);
va_end(ap);
log_write(LOG_NORMAL|LOG_STDERR, "%s: %s (%d)\n",
errbuf, strerror_s, error_number);
if (xml_tag_open())
xml_close_start_tag();
if (!xml_root_written())
xml_start_tag("nmaprun");
/* Close all open XML elements but one. */
while (xml_depth() > 1) {
xml_end_tag();
xml_newline();
}
if (xml_depth() == 1) {
xml_start_tag("runstats");
print_xml_finished_open(timep, &tv);
xml_attribute("exit", "error");
xml_attribute("errormsg", "%s: %s (%d)", errbuf, strerror_s, error_number);
xml_close_empty_tag();
print_xml_hosts();
xml_newline();
xml_end_tag(); /* runstats */
xml_newline();
xml_end_tag(); /* nmaprun */
xml_newline();
}
#ifdef WIN32
HeapFree(GetProcessHeap(), 0, strerror_s);
#endif
log_flush(LOG_NORMAL);
fflush(stderr);
exit(1);
}
/* This function is the Nmap version of perror. It is like pfatal, but it
doesn't write to XML and it only returns, doesn't exit. */
void gh_perror(const char *fmt, ...) {
va_list ap;
int error_number;
char *strerror_s;
#ifdef WIN32
error_number = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error_number, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &strerror_s, 0, NULL);
#else
error_number = errno;
strerror_s = strerror(error_number);
#endif
va_start(ap, fmt);
log_vwrite(LOG_NORMAL|LOG_STDERR, fmt, ap);
va_end(ap);
log_write(LOG_NORMAL|LOG_STDERR, ": %s (%d)\n",
strerror_s, error_number);
#ifdef WIN32
HeapFree(GetProcessHeap(), 0, strerror_s);
#endif
log_flush(LOG_NORMAL);
fflush(stderr);
return;
}