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/***************************************************************************
* output.h -- Some simple error and regular message output functions. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2022 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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