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247 lines
10 KiB
C++
247 lines
10 KiB
C++
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/***************************************************************************
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* output.h -- Some simple error and regular message output functions. *
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* *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2022 Nmap Software LLC ("The Nmap *
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* Project"). Nmap is also a registered trademark of the Nmap Project. *
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* *
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* This program is distributed under the terms of the Nmap Public Source *
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* License (NPSL). The exact license text applying to a particular Nmap *
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* release or source code control revision is contained in the LICENSE *
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* file distributed with that version of Nmap or source code control *
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* revision. More Nmap copyright/legal information is available from *
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* https://nmap.org/book/man-legal.html, and further information on the *
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* NPSL license itself can be found at https://nmap.org/npsl/ . This *
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* header summarizes some key points from the Nmap license, but is no *
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* substitute for the actual license text. *
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* *
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* Nmap is generally free for end users to download and use themselves, *
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* including commercial use. It is available from https://nmap.org. *
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* *
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* The Nmap license generally prohibits companies from using and *
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* redistributing Nmap in commercial products, but we sell a special Nmap *
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* OEM Edition with a more permissive license and special features for *
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* this purpose. See https://nmap.org/oem/ *
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* *
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* If you have received a written Nmap license agreement or contract *
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* stating terms other than these (such as an Nmap OEM license), you may *
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* choose to use and redistribute Nmap under those terms instead. *
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* *
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* The official Nmap Windows builds include the Npcap software *
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* (https://npcap.com) for packet capture and transmission. It is under *
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* separate license terms which forbid redistribution without special *
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* permission. So the official Nmap Windows builds may not be *
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* redistributed without special permission (such as an Nmap OEM *
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* license). *
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* *
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* Source is provided to this software because we believe users have a *
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* right to know exactly what a program is going to do before they run it. *
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* This also allows you to audit the software for security holes. *
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* *
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* Source code also allows you to port Nmap to new platforms, fix bugs, *
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* and add new features. You are highly encouraged to submit your *
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* changes as a Github PR or by email to the dev@nmap.org mailing list *
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* for possible incorporation into the main distribution. Unless you *
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* specify otherwise, it is understood that you are offering us very *
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* broad rights to use your submissions as described in the Nmap Public *
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* Source License Contributor Agreement. This is important because we *
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* fund the project by selling licenses with various terms, and also *
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* because the inability to relicense code has caused devastating *
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* problems for other Free Software projects (such as KDE and NASM). *
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* *
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* The free version of Nmap is distributed in the hope that it will be *
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties, *
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* indemnification and commercial support are all available through the *
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* Npcap OEM program--see https://nmap.org/oem/ *
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* *
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***************************************************************************/
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/* This file contains the functions that are used to print stuff to stout or
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* stderr in Nping. All of them take a "level" and then a variable list of
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* argument. The "level" parameter states which is the minimum level of
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* verbosity that should NpingOps::vb contain to print the message to stdout.
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* For a more detailed explanation, check documentation of verbosity and
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* debugging levels in nping.h */
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#include "NpingOps.h"
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#include "output.h"
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extern NpingOps o;
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#ifdef WIN32
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#include <windows.h>
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#endif /* WIN32 */
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/** Print fatal error messages to stderr and then exits.
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* @warning This function does not return because it calls exit() */
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int nping_fatal(int level, const char *str, ...) {
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va_list list;
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char errstr[MAX_ERR_STR_LEN];
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memset(errstr,0, MAX_ERR_STR_LEN);
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fflush(stdout);
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fflush(stderr);
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int current_vb_level= o.getVerbosity();
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int current_dbg_level= o.getDebugging();
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/* If supplied level is more than current level, do nothing */
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if( level>=QT_4 && level<=VB_4 && level>current_vb_level )
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return OP_SUCCESS;
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if( level>=DBG_0 && level<=DBG_9 && level>current_dbg_level )
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return OP_SUCCESS;
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if ( (level>=QT_3 && level<=VB_4) || (level>=DBG_1 && level<=DBG_9) ){
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va_start(list, str);
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vfprintf(stderr, str, list);
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va_end(list);
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fprintf(stderr,"\n"); /* Print to stderr */
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}
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exit(EXIT_FAILURE);
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return OP_SUCCESS;
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} /* End of nping_fatal() */
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/** Prints recoverable error message to stderr and returns. This function
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* inserts one \n newline automatically in every call. To avoid that
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* behaviour it is possible to OR the supplied level with the constant
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* NO_NEWLINE like this:
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*
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* nping_warning(QT_2|NO_NEWLINE, "I don't want newlines in this string");
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* */
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int nping_warning(int level, const char *str, ...) {
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va_list list;
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char errstr[MAX_ERR_STR_LEN];
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bool skipnewline=false;
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memset(errstr,0, MAX_ERR_STR_LEN);
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fflush(stdout);
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fflush(stderr);
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int current_vb_level= o.getVerbosity();
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int current_dbg_level= o.getDebugging();
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/* Determine if caller requested that we don't print a newline character */
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if ( level & NO_NEWLINE ){
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level ^= NO_NEWLINE; /* Unset the flag restoring the original level */
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skipnewline=true;
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}
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/* If supplied level is more than current level, do nothing */
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if( level>=QT_4 && level<=VB_4 && level>current_vb_level )
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return OP_SUCCESS;
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if( level>=DBG_0 && level<=DBG_9 && level>current_dbg_level )
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return OP_SUCCESS;
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/* Otherwise, print the info to stderr*/
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if ( (level>=QT_3 && level<=VB_4) || (level>=DBG_1 && level<=DBG_9) ){
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va_start(list, str);
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vfprintf(stderr, str, list); /* Print to stderr */
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va_end(list);
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if( !skipnewline )
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fprintf(stderr,"\n");
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}
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return OP_SUCCESS;
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} /* End of nping_warning() */
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/** Print regular messages to stdout. This function inserts one \n newline
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* automatically in every call. To avoid that behaviour it is possible to
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* OR the supplied level with constant NO_NEWLINE like this:
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*
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* nping_print(VB_2|NO_NEWLINE, "I don't want newlines in this string");
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* */
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int nping_print(int level, const char *str, ...){
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va_list list;
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char errstr[MAX_ERR_STR_LEN];
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bool skipnewline=false;
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memset(errstr,0, MAX_ERR_STR_LEN);
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fflush(stdout);
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int current_vb_level= o.getVerbosity();
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int current_dbg_level= o.getDebugging();
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/* Determine if caller requested that we don't print a newline character */
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if ( level & NO_NEWLINE ){
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level ^= NO_NEWLINE; /* Unset the flag restoring the original level */
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skipnewline=true;
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}
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/* If supplied level is more than current level, do nothing */
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if( level>=QT_4 && level<=VB_4 && level>current_vb_level )
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return OP_SUCCESS;
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if( level>=DBG_0 && level<=DBG_9 && level>current_dbg_level )
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return OP_SUCCESS;
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/* Otherwise, print the info to stderr*/
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if ( (level>=QT_3 && level<=VB_4) || (level>=DBG_1 && level<=DBG_9) ){
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va_start(list, str);
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vfprintf(stdout, str, list); /* Print to stderr */
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va_end(list);
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if( !skipnewline )
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fprintf(stdout,"\n");
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}
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return OP_SUCCESS;
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} /* End of nping_print() */
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/*****************************************************************************/
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/* The following functions are provided only for compatibility with some */
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/* code from Nmap. They should NOT be used in any new piece of code unless */
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/* the code you are writing needs to be shared with nmap. */
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/*****************************************************************************/
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/** Print fatal error messages to stderr and then exits.
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* @warning This function does not return because it calls exit() */
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int fatal(const char *str, ...) {
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va_list list;
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char errstr[MAX_ERR_STR_LEN];
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memset(errstr,0, MAX_ERR_STR_LEN);
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va_start(list, str);
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fflush(stdout);
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/* Print error msg to strerr */
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vfprintf(stderr, str, list);
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fprintf(stderr,"\n");
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va_end(list);
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exit(EXIT_FAILURE);
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return OP_SUCCESS;
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} /* End of fatal() */
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/** Print error messages to stderr and then return. */
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int error(const char *str, ...) {
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va_list list;
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char errstr[MAX_ERR_STR_LEN];
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memset(errstr,0, MAX_ERR_STR_LEN);
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va_start(list, str);
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fflush(stdout);
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/* Print error msg to strerr */
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vfprintf(stderr, str, list);
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fprintf(stderr,"\n");
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va_end(list);
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return OP_SUCCESS;
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} /* End of error() */
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/** Needed by struct interface_info *getinterfaces(int *howmany) in common.h
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* (taken originally from nmap tcpip.cc */
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int pfatal(const char *str, ...) {
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va_list list;
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char errstr[MAX_ERR_STR_LEN];
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memset(errstr,0, MAX_ERR_STR_LEN);
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va_start(list, str);
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fflush(stdout);
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/* Print error msg to strerr */
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vfprintf(stderr, str, list);
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fprintf(stderr,"\n");
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va_end(list);
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exit(EXIT_FAILURE);
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return OP_SUCCESS;
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} /* End of fatal() */
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