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/***************************************************************************
* output.h -- Some simple error and regular message output functions. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
*
* The Nmap Security Scanner is (C) 1996-2023 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 dev@nmap.org 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/
*
***************************************************************************/
/* This file contains the functions that are used to print stuff to stout or
* stderr in Nping. All of them take a "level" and then a variable list of
* argument. The "level" parameter states which is the minimum level of
* verbosity that should NpingOps::vb contain to print the message to stdout.
* For a more detailed explanation, check documentation of verbosity and
* debugging levels in nping.h */
#include "NpingOps.h"
#include "output.h"
extern NpingOps o;
#ifdef WIN32
#include <windows.h>
#endif /* WIN32 */
/** Print fatal error messages to stderr and then exits.
* @warning This function does not return because it calls exit() */
int nping_fatal(int level, const char *str, ...) {
va_list list;
char errstr[MAX_ERR_STR_LEN];
memset(errstr,0, MAX_ERR_STR_LEN);
fflush(stdout);
fflush(stderr);
int current_vb_level= o.getVerbosity();
int current_dbg_level= o.getDebugging();
/* If supplied level is more than current level, do nothing */
if( level>=QT_4 && level<=VB_4 && level>current_vb_level )
return OP_SUCCESS;
if( level>=DBG_0 && level<=DBG_9 && level>current_dbg_level )
return OP_SUCCESS;
if ( (level>=QT_3 && level<=VB_4) || (level>=DBG_1 && level<=DBG_9) ){
va_start(list, str);
vfprintf(stderr, str, list);
va_end(list);
fprintf(stderr,"\n"); /* Print to stderr */
}
exit(EXIT_FAILURE);
return OP_SUCCESS;
} /* End of nping_fatal() */
/** Prints recoverable error message to stderr and returns. This function
* inserts one \n newline automatically in every call. To avoid that
* behaviour it is possible to OR the supplied level with the constant
* NO_NEWLINE like this:
*
* nping_warning(QT_2|NO_NEWLINE, "I don't want newlines in this string");
* */
int nping_warning(int level, const char *str, ...) {
va_list list;
char errstr[MAX_ERR_STR_LEN];
bool skipnewline=false;
memset(errstr,0, MAX_ERR_STR_LEN);
fflush(stdout);
fflush(stderr);
int current_vb_level= o.getVerbosity();
int current_dbg_level= o.getDebugging();
/* Determine if caller requested that we don't print a newline character */
if ( level & NO_NEWLINE ){
level ^= NO_NEWLINE; /* Unset the flag restoring the original level */
skipnewline=true;
}
/* If supplied level is more than current level, do nothing */
if( level>=QT_4 && level<=VB_4 && level>current_vb_level )
return OP_SUCCESS;
if( level>=DBG_0 && level<=DBG_9 && level>current_dbg_level )
return OP_SUCCESS;
/* Otherwise, print the info to stderr*/
if ( (level>=QT_3 && level<=VB_4) || (level>=DBG_1 && level<=DBG_9) ){
va_start(list, str);
vfprintf(stderr, str, list); /* Print to stderr */
va_end(list);
if( !skipnewline )
fprintf(stderr,"\n");
}
return OP_SUCCESS;
} /* End of nping_warning() */
/** Print regular messages to stdout. This function inserts one \n newline
* automatically in every call. To avoid that behaviour it is possible to
* OR the supplied level with constant NO_NEWLINE like this:
*
* nping_print(VB_2|NO_NEWLINE, "I don't want newlines in this string");
* */
int nping_print(int level, const char *str, ...){
va_list list;
char errstr[MAX_ERR_STR_LEN];
bool skipnewline=false;
memset(errstr,0, MAX_ERR_STR_LEN);
fflush(stdout);
int current_vb_level= o.getVerbosity();
int current_dbg_level= o.getDebugging();
/* Determine if caller requested that we don't print a newline character */
if ( level & NO_NEWLINE ){
level ^= NO_NEWLINE; /* Unset the flag restoring the original level */
skipnewline=true;
}
/* If supplied level is more than current level, do nothing */
if( level>=QT_4 && level<=VB_4 && level>current_vb_level )
return OP_SUCCESS;
if( level>=DBG_0 && level<=DBG_9 && level>current_dbg_level )
return OP_SUCCESS;
/* Otherwise, print the info to stderr*/
if ( (level>=QT_3 && level<=VB_4) || (level>=DBG_1 && level<=DBG_9) ){
va_start(list, str);
vfprintf(stdout, str, list); /* Print to stderr */
va_end(list);
if( !skipnewline )
fprintf(stdout,"\n");
}
return OP_SUCCESS;
} /* End of nping_print() */
/*****************************************************************************/
/* The following functions are provided only for compatibility with some */
/* code from Nmap. They should NOT be used in any new piece of code unless */
/* the code you are writing needs to be shared with nmap. */
/*****************************************************************************/
/** Print fatal error messages to stderr and then exits.
* @warning This function does not return because it calls exit() */
int fatal(const char *str, ...) {
va_list list;
char errstr[MAX_ERR_STR_LEN];
memset(errstr,0, MAX_ERR_STR_LEN);
va_start(list, str);
fflush(stdout);
/* Print error msg to strerr */
vfprintf(stderr, str, list);
fprintf(stderr,"\n");
va_end(list);
exit(EXIT_FAILURE);
return OP_SUCCESS;
} /* End of fatal() */
/** Print error messages to stderr and then return. */
int error(const char *str, ...) {
va_list list;
char errstr[MAX_ERR_STR_LEN];
memset(errstr,0, MAX_ERR_STR_LEN);
va_start(list, str);
fflush(stdout);
/* Print error msg to strerr */
vfprintf(stderr, str, list);
fprintf(stderr,"\n");
va_end(list);
return OP_SUCCESS;
} /* End of error() */
/** Needed by struct interface_info *getinterfaces(int *howmany) in common.h
* (taken originally from nmap tcpip.cc */
int pfatal(const char *str, ...) {
va_list list;
char errstr[MAX_ERR_STR_LEN];
memset(errstr,0, MAX_ERR_STR_LEN);
va_start(list, str);
fflush(stdout);
/* Print error msg to strerr */
vfprintf(stderr, str, list);
fprintf(stderr,"\n");
va_end(list);
exit(EXIT_FAILURE);
return OP_SUCCESS;
} /* End of fatal() */
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