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NmapOutputTable.cc
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NmapOutputTable.cc
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/***************************************************************************
* NmapOutputTable.cc -- A relatively simple class for organizing Nmap *
* output into an orderly table for display to the user. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2018 Insecure.Com LLC ("The Nmap *
* Project"). Nmap is also a registered trademark of the Nmap Project. *
* This program is free software; you may redistribute and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE *
* CLARIFICATIONS AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your *
* right to use, modify, and redistribute this software under certain *
* conditions. If you wish to embed Nmap technology into proprietary *
* software, we sell alternative licenses (contact sales@nmap.com). *
* Dozens of software vendors already license Nmap technology such as *
* host discovery, port scanning, OS detection, version detection, and *
* the Nmap Scripting Engine. *
* *
* Note that the GPL places important restrictions on "derivative works", *
* yet it does not provide a detailed definition of that term. To avoid *
* misunderstandings, we interpret that term as broadly as copyright law *
* allows. For example, we consider an application to constitute a *
* derivative work for the purpose of this license if it does any of the *
* following with any software or content covered by this license *
* ("Covered Software"): *
* *
* o Integrates source code from Covered Software. *
* *
* o Reads or includes copyrighted data files, such as Nmap's nmap-os-db *
* or nmap-service-probes. *
* *
* o Is designed specifically to execute Covered Software and parse the *
* results (as opposed to typical shell or execution-menu apps, which will *
* execute anything you tell them to). *
* *
* o Includes Covered Software in a proprietary executable installer. The *
* installers produced by InstallShield are an example of this. Including *
* Nmap with other software in compressed or archival form does not *
* trigger this provision, provided appropriate open source decompression *
* or de-archiving software is widely available for no charge. For the *
* purposes of this license, an installer is considered to include Covered *
* Software even if it actually retrieves a copy of Covered Software from *
* another source during runtime (such as by downloading it from the *
* Internet). *
* *
* o Links (statically or dynamically) to a library which does any of the *
* above. *
* *
* o Executes a helper program, module, or script to do any of the above. *
* *
* This list is not exclusive, but is meant to clarify our interpretation *
* of derived works with some common examples. Other people may interpret *
* the plain GPL differently, so we consider this a special exception to *
* the GPL that we apply to Covered Software. Works which meet any of *
* these conditions must conform to all of the terms of this license, *
* particularly including the GPL Section 3 requirements of providing *
* source code and allowing free redistribution of the work as a whole. *
* *
* As another special exception to the GPL terms, the Nmap Project grants *
* permission to link the code of this program with any version of the *
* OpenSSL library which is distributed under a license identical to that *
* listed in the included docs/licenses/OpenSSL.txt file, and distribute *
* linked combinations including the two. *
* *
* The Nmap Project has permission to redistribute Npcap, a packet *
* capturing driver and library for the Microsoft Windows platform. *
* Npcap is a separate work with it's own license rather than this Nmap *
* license. Since the Npcap license does not permit redistribution *
* without special permission, our Nmap Windows binary packages which *
* contain Npcap may not be redistributed without special permission. *
* *
* Any redistribution of Covered Software, including any derived works, *
* must obey and carry forward all of the terms of this license, including *
* obeying all GPL rules and restrictions. For example, source code of *
* the whole work must be provided and free redistribution must be *
* allowed. All GPL references to "this License", are to be treated as *
* including the terms and conditions of this license text as well. *
* *
* Because this license imposes special exceptions to the GPL, Covered *
* Work may not be combined (even as part of a larger work) with plain GPL *
* software. The terms, conditions, and exceptions of this license must *
* be included as well. This license is incompatible with some other open *
* source licenses as well. In some cases we can relicense portions of *
* Nmap or grant special permissions to use it in other open source *
* software. Please contact fyodor@nmap.org with any such requests. *
* Similarly, we don't incorporate incompatible open source software into *
* Covered Software without special permission from the copyright holders. *
* *
* If you have any questions about the licensing restrictions on using *
* Nmap in other works, we are happy to help. As mentioned above, we also *
* offer an alternative license to integrate Nmap into proprietary *
* applications and appliances. These contracts have been sold to dozens *
* of software vendors, and generally include a perpetual license as well *
* as providing support and updates. They also fund the continued *
* development of Nmap. Please email sales@nmap.com for further *
* information. *
* *
* If you have received a written license agreement or contract for *
* Covered Software stating terms other than these, you may choose to use *
* and redistribute Covered Software under those terms instead of these. *
* *
* 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 send your changes *
* to the dev@nmap.org mailing list for possible incorporation into the *
* main distribution. By sending these changes to Fyodor or one of the *
* Insecure.Org development mailing lists, or checking them into the Nmap *
* source code repository, it is understood (unless you specify *
* otherwise) that you are offering the Nmap Project the unlimited, *
* non-exclusive right to reuse, modify, and relicense the code. Nmap *
* will always be available Open Source, but this is important because *
* the inability to relicense code has caused devastating problems for *
* other Free Software projects (such as KDE and NASM). We also *
* occasionally relicense the code to third parties as discussed above. *
* If you wish to specify special license conditions of your *
* contributions, just say so when you send them. *
* *
* This program 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. See the Nmap *
* license file for more details (it's in a COPYING file included with *
* Nmap, and also available from https://svn.nmap.org/nmap/COPYING) *
* *
***************************************************************************/
/* $Id$ */
#ifdef WIN32
#include "nmap_winconfig.h"
#endif
#include "NmapOutputTable.h"
#include "nmap_error.h"
#include <stdlib.h>
NmapOutputTable::NmapOutputTable(int nrows, int ncols) {
numRows = nrows;
numColumns = ncols;
assert(numRows > 0);
assert(numColumns > 0);
table = (struct NmapOutputTableCell *) safe_zalloc(sizeof(struct NmapOutputTableCell) * nrows * ncols);
maxColLen = (int *) safe_zalloc(sizeof(*maxColLen) * ncols);
itemsInRow = (int *) safe_zalloc(sizeof(*itemsInRow) * nrows);
tableout = NULL;
tableoutsz = 0;
}
NmapOutputTable::~NmapOutputTable() {
unsigned int col, row;
struct NmapOutputTableCell *cell;
for(row = 0; row < numRows; row++) {
for(col = 0; col < numColumns; col++) {
cell = getCellAddy(row, col);
if (cell->weAllocated) {
assert(cell->str);
free(cell->str);
}
}
}
free(table);
free(maxColLen);
free(itemsInRow);
if (tableout) free(tableout);
}
void NmapOutputTable::addItem(unsigned int row, unsigned int column, bool fullrow,
bool copy, const char *item, int itemlen) {
struct NmapOutputTableCell *cell;
int mc = maxColLen[column];
addItem(row, column, copy, item, itemlen);
if(fullrow) {
maxColLen[column] = mc;
cell = getCellAddy(row, column);
cell->fullrow = fullrow;
}
return;
}
void NmapOutputTable::addItem(unsigned int row, unsigned int column, bool copy, const char *item,
int itemlen) {
struct NmapOutputTableCell *cell;
assert(row < numRows);
assert(column < numColumns);
if (itemlen < 0)
itemlen = strlen(item);
if (itemlen == 0)
return;
cell = getCellAddy(row, column);
assert(cell->str == NULL); // I'll worry about replacing members if I ever need it
itemsInRow[row]++;
cell->strlength = itemlen;
if (copy) {
cell->str = (char *) safe_malloc(itemlen + 1);
memcpy(cell->str, item, itemlen);
cell->str[itemlen] = '\0';
} else {
cell->str = (char *) item;
}
cell->weAllocated = copy;
if (maxColLen[column] < itemlen)
maxColLen[column] = itemlen;
return;
}
void NmapOutputTable::addItemFormatted(unsigned int row,
unsigned int column,
bool fullrow,
const char *fmt, ...) {
struct NmapOutputTableCell *cell;
int mc = maxColLen[column];
unsigned int res;
va_list ap;
va_start(ap,fmt);
char buf[4096];
res = Vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
if (res >= sizeof(buf))
fatal("NmapOutputTable only supports adding up to 4096 to a cell via %s.", __func__);
addItem(row, column, fullrow, true, buf, res);
if(fullrow) {
maxColLen[column] = mc;
cell = getCellAddy(row, column);
cell->fullrow = fullrow;
}
}
/* True if every column in nrow is empty */
bool NmapOutputTable::emptyRow(unsigned int nrow) {
NmapOutputTableCell *cell;
unsigned int col;
bool isEmpty = true;
assert(nrow < numRows);
for(col = 0 ; col < numColumns; col++) {
cell = getCellAddy(nrow, col);
if(cell->strlength > 0) {
isEmpty = false;
break;
}
}
return isEmpty;
}
// This function sticks the entire table into a character buffer.
// Note that the buffer is likely to be reused if you call the
// function again, and it will also be invalidated if you free the
// table. If size is not NULL, it will be filled with the size of
// the ASCII table in bytes (not including the terminating NUL)
// All blank rows are removed from the returned string
char *NmapOutputTable::printableTable(int *size) {
unsigned int col, row;
int p = 0; /* The offset into tableout */
int clen = 0;
int i;
struct NmapOutputTableCell *cell;
int validthisrow;
if (tableoutsz == 0) {
tableoutsz = 512; /* Start us off with half a k */
tableout = (char *) safe_malloc(tableoutsz);
}
for(row = 0; row < numRows; row++) {
validthisrow = 0;
if(emptyRow(row))
continue;
cell = getCellAddy(row, 0);
if(cell->fullrow && cell->strlength > 0) {
/* Full rows are easy, just make sure we have the space + \n\0 */
if (cell->strlength + p + 2 > tableoutsz) {
tableoutsz = (cell->strlength + p + 2) * 2;
tableout = (char *) safe_realloc(tableout, tableoutsz);
}
memcpy(tableout + p, cell->str, cell->strlength);
p += cell->strlength;
} else {
for(col = 0; col < numColumns; col++) {
cell = getCellAddy(row, col);
clen = maxColLen[col];
/* Cells get padded with an extra space + \n\0 */
if (clen + p + 3 > tableoutsz) {
tableoutsz = (cell->strlength + p + 2) * 2;
tableout = (char *) safe_realloc(tableout, tableoutsz);
}
if (cell->strlength > 0) {
memcpy(tableout + p, cell->str, cell->strlength);
p += cell->strlength;
validthisrow++;
}
// No point leaving trailing spaces ...
if (validthisrow < itemsInRow[row]) {
for(i=cell->strlength; i <= clen; i++) // one extra because of space between columns
*(tableout + p++) = ' ';
}
}
}
*(tableout + p++) = '\n';
}
*(tableout + p) = '\0';
if (size) *size = p;
return tableout;
}