/*************************************************************************** * output.h -- Some simple error and regular message output functions. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2020 Insecure.Com 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.org) 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 #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() */