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d1a77bb85e
scans. This is the code that prints Host ... appears to be up. Host ... appears to be down. Host ... appears to be up ... good. Host ... appears to be down, skipping it Except that now these messages are uniform and are Host ... is up. Host ... is down. In addition, the host state --reason information is printed for port scans just as for ping scans, which appears to have been an oversight before.
374 lines
15 KiB
C++
374 lines
15 KiB
C++
/***************************************************************************
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* portreasons.cc -- Verbose packet-level information on port states *
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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) 1996-2009 Insecure.Com LLC. Nmap is *
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* also a registered trademark of Insecure.Com LLC. This program is free *
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* software; you may redistribute and/or modify it under the terms of the *
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* GNU General Public License as published by the Free Software *
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* Foundation; Version 2 with the clarifications and exceptions described *
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* below. This guarantees your right to use, modify, and redistribute *
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* this software under certain conditions. If you wish to embed Nmap *
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* technology into proprietary software, we sell alternative licenses *
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* (contact sales@insecure.com). Dozens of software vendors already *
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* license Nmap technology such as host discovery, port scanning, OS *
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* detection, and version detection. *
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* *
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* Note that the GPL places important restrictions on "derived works", yet *
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* it does not provide a detailed definition of that term. To avoid *
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* misunderstandings, we consider an application to constitute a *
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* "derivative work" for the purpose of this license if it does any of the *
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* following: *
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* o Integrates source code from Nmap *
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* o Reads or includes Nmap copyrighted data files, such as *
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* nmap-os-db or nmap-service-probes. *
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* o Executes Nmap and parses the results (as opposed to typical shell or *
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* execution-menu apps, which simply display raw Nmap output and so are *
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* not derivative works.) *
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* o Integrates/includes/aggregates Nmap into a proprietary executable *
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* installer, such as those produced by InstallShield. *
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* o Links to a library or executes a program that does any of the above *
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* *
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* The term "Nmap" should be taken to also include any portions or derived *
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* works of Nmap. This list is not exclusive, but is meant to clarify our *
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* interpretation of derived works with some common examples. Our *
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* interpretation applies only to Nmap--we don't speak for other people's *
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* GPL works. *
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* *
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* If you have any questions about the GPL licensing restrictions on using *
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* Nmap in non-GPL works, we would be happy to help. As mentioned above, *
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* we also offer alternative license to integrate Nmap into proprietary *
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* applications and appliances. These contracts have been sold to dozens *
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* of software vendors, and generally include a perpetual license as well *
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* as providing for priority support and updates as well as helping to *
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* fund the continued development of Nmap technology. Please email *
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* sales@insecure.com for further information. *
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* *
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* As a special exception to the GPL terms, Insecure.Com LLC grants *
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* permission to link the code of this program with any version of the *
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* OpenSSL library which is distributed under a license identical to that *
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* listed in the included COPYING.OpenSSL file, and distribute linked *
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* combinations including the two. You must obey the GNU GPL in all *
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* respects for all of the code used other than OpenSSL. If you modify *
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* this file, you may extend this exception to your version of the file, *
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* but you are not obligated to do so. *
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* *
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* If you received these files with a written license agreement or *
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* contract stating terms other than the terms above, then that *
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* alternative license agreement takes precedence over these comments. *
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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 (none *
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* have been found so far). *
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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 send your changes *
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* to fyodor@insecure.org for possible incorporation into the main *
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* distribution. By sending these changes to Fyodor or one of the *
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* Insecure.Org development mailing lists, it is assumed that you are *
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* offering Fyodor and Insecure.Com LLC the unlimited, non-exclusive right *
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* to reuse, modify, and relicense the code. Nmap will always be *
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* available Open Source, but this is important because the inability to *
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* relicense code has caused devastating problems for other Free Software *
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* projects (such as KDE and NASM). We also occasionally relicense the *
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* code to third parties as discussed above. If you wish to specify *
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* special license conditions of your contributions, just say so when you *
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* send them. *
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* *
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* This program is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License v2.0 for more details at *
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* http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file *
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* included with Nmap. *
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* *
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***************************************************************************/
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/*
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* Written by Eddie Bell <ejlbell@gmail.com> 2007
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*/
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#include <iostream>
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#include "nmap.h"
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#include "portlist.h"
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#include "NmapOps.h"
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#include "portreasons.h"
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#include "Target.h"
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#ifdef WIN32
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#include "winfix.h"
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#endif
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extern NmapOps o;
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class PortList;
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/* Possible plural and singular reasons */
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const char *reason_text[ER_MAX+1]={
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"reset", "conn-refused", "syn-ack", "syn-ack", "udp-response",
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"proto-response", "perm-denied",
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"net-unreach", "host-unreach", "proto-unreach",
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"port-unreach", "echo-reply", "unknown", "unknown", "dest-unreach",
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"source-quench", "net-prohibited", "host-prohibited", "unknown",
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"unknown", "admin-prohibited", "unknown", "time-exceeded", "unknown", "unknown",
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"timestamp-reply", "unknown", "unknown", "unknown", "addressmask-reply",
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"no-ipid-change", "ipid-change", "arp-response", "tcp-response",
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"no-response", "localhost-response", "script-set", "unknown-response","user-set"
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};
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const char *reason_pl_text[ER_MAX+1]={
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"resets", "conn-refused", "syn-acks", "syn-acks", "udp-responses",
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"proto-responses", "perm-denieds",
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"net-unreaches", "host-unreaches", "proto-unreaches",
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"port-unreaches", "echo-replies", "unknowns", "unknowns", "dest-unreaches",
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"source-quenches", "net-prohibiteds", "host-prohibiteds", "unknowns",
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"unknowns", "admin-prohibiteds", "unknowns", "time-exceededs", "unknowns",
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"unknowns", "timestamp-replies", "unknowns", "unknowns", "unknowns",
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"addressmask-replies", "no-ipid-changes", "ipid-changes", "arp-responses",
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"tcp-responses", "no-responses", "localhost-response", "script-set", "unknown-responses"
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};
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static void state_reason_summary_init(state_reason_summary_t *r) {
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r->reason_id = ER_UNKNOWN;
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r->count = 0;
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r->next = NULL;
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}
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static void state_reason_summary_dinit(state_reason_summary_t *r) {
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state_reason_summary_t *tmp;
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while(r != NULL) {
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tmp = r->next;
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free(r);
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r = tmp;
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}
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}
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/* Counts how different valid state reasons exist */
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static int state_summary_size(state_reason_summary_t *head) {
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state_reason_summary_t *current = head;
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int size = 0;
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while(current) {
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if(current->count > 0)
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size++;
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current = current->next;
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}
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return size;
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}
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/* Simon Tatham's linked list merge sort
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*
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* Merge sort works really well on linked lists
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* because it does not require the O(N) extra space
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* needed with arrays */
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static state_reason_summary_t *reason_sort(state_reason_summary_t *list) {
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state_reason_summary_t *p, *q, *e, *tail;
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int insize = 1, nmerges, psize, qsize, i;
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if (!list)
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return NULL;
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while (1) {
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p = list;
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list = NULL;
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tail = NULL;
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nmerges = 0;
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while (p) {
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nmerges++;
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q = p;
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psize = 0;
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for (i = 0; i < insize; i++) {
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psize++;
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q = q->next;
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if (!q) break;
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}
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qsize = insize;
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while (psize > 0 || (qsize > 0 && q)) {
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if (psize == 0) {
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e = q; q = q->next; qsize--;
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} else if (qsize == 0 || !q) {
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e = p; p = p->next; psize--;
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} else if (q->count<p->count) {
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e = p; p = p->next; psize--;
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} else {
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e = q; q = q->next; qsize--;
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}
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if (tail) {
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tail->next = e;
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} else {
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list = e;
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}
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tail = e;
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}
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p = q;
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}
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if (!tail)
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return NULL;
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tail->next = NULL;
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if (nmerges <= 1)
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return list;
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insize *= 2;
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}
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}
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/* Builds and aggregates reason state summary messages */
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static int update_state_summary(state_reason_summary_t *head, reason_t reason_id) {
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state_reason_summary_t *tmp = head;
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if(tmp == NULL)
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return -1;
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while(1) {
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if(tmp->reason_id == reason_id) {
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tmp->count++;
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return 0;
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}
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if(tmp->next == NULL) {
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tmp->next = (state_reason_summary_t *)safe_malloc(sizeof(state_reason_summary_t));
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tmp = tmp->next;
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break;
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}
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tmp = tmp->next;
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}
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state_reason_summary_init(tmp);
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tmp->reason_id = reason_id;
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tmp->count = 1;
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return 0;
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}
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/* Converts Port objects and their corrosponsing state_reason structures into
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* state_reason_summary structures using update_state_summary */
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static unsigned int get_state_summary(state_reason_summary_t *head, PortList *Ports, int state) {
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Port *current = NULL;
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state_reason_summary_t *reason;
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unsigned int total = 0;
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unsigned short proto = (o.ipprotscan) ? IPPROTO_IP : TCPANDUDP;
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if(head == NULL)
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return 0;
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reason = head;
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while((current = Ports->nextPort(current, proto, state)) != NULL) {
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if(Ports->isIgnoredState(current->state)) {
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total++;
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update_state_summary(reason, current->reason.reason_id);
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}
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}
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return total;
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}
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/* parse and sort reason summary for main print_* functions */
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static state_reason_summary_t *print_state_summary_internal(PortList *Ports, int state) {
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state_reason_summary_t *reason_head;
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reason_head = (state_reason_summary_t *)safe_malloc(sizeof(state_reason_summary_t));
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state_reason_summary_init(reason_head);
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if((get_state_summary(reason_head, Ports, state) < 1)) {
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state_reason_summary_dinit(reason_head);
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return NULL;
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}
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if((reason_head = reason_sort(reason_head)) == NULL)
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return NULL;
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return reason_head;
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}
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/* looks up reason_id's and returns with the plural or singular
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* string representation. If 'number' is equal to 1 then the
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* singular is used, otherwise the plural */
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const char *reason_str(reason_t reason_code, unsigned int number) {
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if(reason_code > ER_MAX)
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return "unknown";
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if(number == 1)
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return reason_text[reason_code];
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else
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return reason_pl_text[reason_code];
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}
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void state_reason_init(state_reason_t *reason) {
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reason->reason_id = ER_UNKNOWN;
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reason->ip_addr.s_addr = 0;
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reason->ttl = 0;
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}
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/* Main external interface to converting, building, sorting and
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* printing plain-text state reason summaries */
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void print_state_summary(PortList *Ports, unsigned short type) {
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state_reason_summary_t *reason_head, *currentr;
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bool first_time = true;
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const char *separator = ", ";
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int states;
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if((reason_head = print_state_summary_internal(Ports, 0)) == NULL)
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return;
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if(type == STATE_REASON_EMPTY)
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log_write(LOG_PLAIN, " because of");
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else if(type == STATE_REASON_FULL)
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log_write(LOG_PLAIN, "Reason:");
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else
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assert(0);
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states = state_summary_size(reason_head);
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currentr = reason_head;
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while(currentr != NULL) {
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if(states == 1 && (!first_time))
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separator = " and ";
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if(currentr->count > 0) {
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log_write(LOG_PLAIN, "%s%d %s", (first_time) ? " " : separator,
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currentr->count, reason_str(currentr->reason_id, currentr->count));
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first_time = false;
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}
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states--;
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currentr = currentr->next;
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}
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if(type == STATE_REASON_FULL)
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log_write(LOG_PLAIN, "\n");
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state_reason_summary_dinit(reason_head);
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}
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void print_xml_state_summary(PortList *Ports, int state) {
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state_reason_summary_t *reason_head, *currentr;
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if((currentr = reason_head = print_state_summary_internal(Ports, state)) == NULL)
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return;
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while(currentr != NULL) {
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if(currentr->count > 0)
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log_write(LOG_XML, "<extrareasons reason=\"%s\" count=\"%d\"/>\n",
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reason_str(currentr->reason_id, currentr->count), currentr->count);
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currentr = currentr->next;
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}
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state_reason_summary_dinit(reason_head);
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}
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/* converts target into reason message for ping scans. Uses a static
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* buffer so new values overwrite old values */
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char *target_reason_str(Target *t) {
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static char reason[128];
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memset(reason,'\0', 128);
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assert(t->reason.reason_id != ER_NORESPONSE);
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Snprintf(reason, 128, "received %s", reason_str(t->reason.reason_id, SINGULAR));
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return reason;
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}
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/* Build an output string based on reason and source ip address.
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* uses a static return value so previous values will be over
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* written by subsequent calls */
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char *port_reason_str(state_reason_t r) {
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static char reason[128];
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memset(reason,'\0', 128);
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Snprintf(reason, 128, "%s%s%s", reason_str(r.reason_id, SINGULAR),
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(r.ip_addr.s_addr==0)?"":" from ",
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(r.ip_addr.s_addr==0)?"":inet_ntoa(r.ip_addr));
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return reason;
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}
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