Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
tree: 22dc30d786
Fetching contributors…

Cannot retrieve contributors at this time

656 lines (575 sloc) 24.598 kb
/***************************************************************************
* NmapOps.cc -- The NmapOps class contains global options, mostly based *
* on user-provided command-line settings. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is *
* also a registered trademark of Insecure.Com LLC. 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 with the clarifications and exceptions described *
* below. 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@insecure.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 "derived 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: *
* o Integrates source code from Nmap *
* o Reads or includes Nmap copyrighted data files, such as *
* nmap-os-db or nmap-service-probes. *
* o Executes Nmap and parses the results (as opposed to typical shell or *
* execution-menu apps, which simply display raw Nmap output and so are *
* not derivative works.) *
* o Integrates/includes/aggregates Nmap into a proprietary executable *
* installer, such as those produced by InstallShield. *
* o Links to a library or executes a program that does any of the above *
* *
* The term "Nmap" should be taken to also include any portions or derived *
* works of Nmap, as well as other software we distribute under this *
* license such as Zenmap, Ncat, and Nping. This list is not exclusive, *
* but is meant to clarify our interpretation of derived works with some *
* common examples. Our interpretation applies only to Nmap--we don't *
* speak for other people's GPL works. *
* *
* If you have any questions about the GPL licensing restrictions on using *
* Nmap in non-GPL works, we would be happy to help. As mentioned above, *
* we also offer 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 for priority support and updates. They also fund the *
* continued development of Nmap. Please email sales@insecure.com for *
* further information. *
* *
* As a special exception to the GPL terms, Insecure.Com LLC 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. You must obey the GNU GPL in all *
* respects for all of the code used other than OpenSSL. If you modify *
* this file, you may extend this exception to your version of the file, *
* but you are not obligated to do so. *
* *
* If you received these files with a written license agreement or *
* contract stating terms other than the terms above, then that *
* alternative license agreement takes precedence over these comments. *
* *
* 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 (none *
* have been found so far). *
* *
* 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 nmap-dev@insecure.org 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 (Insecure.Com LLC) 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 GNU *
* General Public License v2.0 for more details at *
* http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file *
* included with Nmap. *
* *
***************************************************************************/
/* $Id$ */
#include "nmap.h"
#include "nbase.h"
#include "NmapOps.h"
#include "services.h"
#include "utils.h"
#ifdef WIN32
#include "winfix.h"
#endif
NmapOps o;
NmapOps::NmapOps() {
datadir = NULL;
xsl_stylesheet = NULL;
Initialize();
}
NmapOps::~NmapOps() {
if (xsl_stylesheet) {
free(xsl_stylesheet);
xsl_stylesheet = NULL;
}
if (reference_FPs) {
delete reference_FPs;
reference_FPs = NULL;
}
if (dns_servers) {
free(dns_servers);
dns_servers = NULL;
}
if (extra_payload) {
free(extra_payload);
extra_payload = NULL;
}
if (ipoptions) {
free(ipoptions);
ipoptions = NULL;
}
if (portlist) {
free(portlist);
portlist = NULL;
}
if (exclude_spec) {
free(exclude_spec);
exclude_spec = NULL;
}
if (idleProxy) {
free(idleProxy);
idleProxy = NULL;
}
if (datadir) {
free(datadir);
datadir = NULL;
}
#ifndef NOLUA
if (scriptversion || script)
close_nse();
if (scriptargs) {
free(scriptargs);
scriptargs = NULL;
}
#endif
}
void NmapOps::ReInit() {
Initialize();
}
// no setpf() because it is based on setaf() values
int NmapOps::pf() {
return (af() == AF_INET)? PF_INET : PF_INET6;
}
int NmapOps::SourceSockAddr(struct sockaddr_storage *ss, size_t *ss_len) {
if (sourcesocklen <= 0)
return 1;
assert(sourcesocklen <= sizeof(*ss));
if (ss)
memcpy(ss, &sourcesock, sourcesocklen);
if (ss_len)
*ss_len = sourcesocklen;
return 0;
}
/* Returns a const pointer to the source address if set, or NULL if unset. */
const struct sockaddr_storage *NmapOps::SourceSockAddr() const {
if (sourcesock.ss_family == AF_UNSPEC)
return NULL;
else
return &sourcesock;
}
/* Note that it is OK to pass in a sockaddr_in or sockaddr_in6 casted
to sockaddr_storage */
void NmapOps::setSourceSockAddr(struct sockaddr_storage *ss, size_t ss_len) {
assert(ss_len > 0 && ss_len <= sizeof(*ss));
memcpy(&sourcesock, ss, ss_len);
sourcesocklen = ss_len;
}
// Number of seconds since getStartTime(). The current time is an
// optional argument to avoid an extra gettimeofday() call.
float NmapOps::TimeSinceStart(const struct timeval *now) {
struct timeval tv;
if (!now)
gettimeofday(&tv, NULL);
else tv = *now;
return TIMEVAL_FSEC_SUBTRACT(tv, start_time);
}
// Convert a filename to a file:// URL. The return value must be freed.
static char *filename_to_url(const char *filename) {
std::string url(filename);
char percent_buffer[10];
#if WIN32
for (std::string::iterator p = url.begin(); p != url.end(); p++) {
if (*p == '\\')
*p = '/';
}
/* Put a pseudo-root directory before "C:/" or whatever. */
url = "/" + url;
#endif
/* Percent-encode any troublesome characters. */
std::string::size_type i = 0;
/* See RFC 3986, section 3.3 "Path" for allowed characters. */
while ((i = url.find_first_of("?#[]%", i)) != std::string::npos) {
Snprintf(percent_buffer, sizeof(percent_buffer), "%%%02X", url[i]);
url.replace(i, 1, percent_buffer);
i += strlen(percent_buffer);
}
url = "file://" + url;
return strdup(url.c_str());
}
void NmapOps::Initialize() {
setaf(AF_INET);
#if defined WIN32 || defined __amigaos__
isr00t = 1;
#else
if (getenv("NMAP_PRIVILEGED"))
isr00t = 1;
else if (getenv("NMAP_UNPRIVILEGED"))
isr00t = 0;
else
isr00t = !(geteuid());
#endif
have_pcap = true;
debugging = 0;
verbose = 0;
min_packet_send_rate = 0.0; /* Unset. */
max_packet_send_rate = 0.0; /* Unset. */
stats_interval = 0.0; /* Unset. */
randomize_hosts = 0;
randomize_ports = 1;
sendpref = PACKET_SEND_NOPREF;
spoofsource = 0;
fastscan = 0;
device[0] = '\0';
ping_group_sz = PING_GROUP_SZ;
nogcc = 0;
generate_random_ips = 0;
reference_FPs = NULL;
magic_port = 33000 + (get_random_uint() % 31000);
magic_port_set = false;
timing_level = 3;
max_parallelism = 0;
min_parallelism = 0;
max_os_tries = 5;
max_rtt_timeout = MAX_RTT_TIMEOUT;
min_rtt_timeout = MIN_RTT_TIMEOUT;
initial_rtt_timeout = INITIAL_RTT_TIMEOUT;
max_retransmissions = MAX_RETRANSMISSIONS;
min_host_group_sz = 1;
max_host_group_sz = 100000; // don't want to be restrictive unless user sets
max_tcp_scan_delay = MAX_TCP_SCAN_DELAY;
max_udp_scan_delay = MAX_UDP_SCAN_DELAY;
max_sctp_scan_delay = MAX_SCTP_SCAN_DELAY;
max_ips_to_scan = 0;
extra_payload_length = 0;
extra_payload = NULL;
scan_delay = 0;
open_only = false;
scanflags = -1;
defeat_rst_ratelimit = 0;
resume_ip.s_addr = 0;
osscan_limit = 0;
osscan_guess = 0;
numdecoys = 0;
decoyturn = -1;
osscan = 0;
servicescan = 0;
override_excludeports = 0;
version_intensity = 7;
pingtype = PINGTYPE_UNKNOWN;
listscan = allowall = ackscan = bouncescan = connectscan = 0;
nullscan = xmasscan = fragscan = synscan = windowscan = 0;
maimonscan = idlescan = finscan = udpscan = ipprotscan = 0;
noportscan = noresolve = 0;
sctpinitscan = 0;
sctpcookieechoscan = 0;
append_output = 0;
memset(logfd, 0, sizeof(FILE *) * LOG_NUM_FILES);
ttl = -1;
badsum = 0;
nmap_stdout = stdout;
gettimeofday(&start_time, NULL);
pTrace = vTrace = false;
reason = false;
adler32 = false;
if (datadir) free(datadir);
datadir = NULL;
xsl_stylesheet_set = false;
if (xsl_stylesheet) free(xsl_stylesheet);
xsl_stylesheet = NULL;
spoof_mac_set = false;
mass_dns = true;
deprecated_xml_osclass = false;
resolve_all = 0;
dns_servers = NULL;
implicitARPPing = true;
numhosts_scanned = 0;
numhosts_up = 0;
numhosts_scanning = 0;
noninteractive = false;
current_scantype = STYPE_UNKNOWN;
ipoptions = NULL;
ipoptionslen = 0;
ipopt_firsthop = 0;
ipopt_lasthop = 0;
release_memory = false;
topportlevel = -1;
#ifndef NOLUA
script = 0;
scriptargs = NULL;
scriptversion = 0;
scripttrace = 0;
scriptupdatedb = 0;
scripthelp = false;
chosenScripts.clear();
#endif
memset(&sourcesock, 0, sizeof(sourcesock));
sourcesocklen = 0;
excludefd = NULL;
exclude_spec = NULL;
quashargv = 0;
inputfd = NULL;
idleProxy = NULL;
portlist = NULL;
}
bool NmapOps::SCTPScan() {
return sctpinitscan|sctpcookieechoscan;
}
bool NmapOps::TCPScan() {
return ackscan|bouncescan|connectscan|finscan|idlescan|maimonscan|nullscan|synscan|windowscan|xmasscan;
}
bool NmapOps::UDPScan() {
return udpscan;
}
bool NmapOps::RawScan() {
if (ackscan||finscan||idlescan||ipprotscan||maimonscan||nullscan||osscan||synscan||udpscan||windowscan||xmasscan||sctpinitscan||sctpcookieechoscan||traceroute)
return true;
if (pingtype & (PINGTYPE_ICMP_PING|PINGTYPE_ICMP_MASK|PINGTYPE_ICMP_TS|PINGTYPE_TCP_USE_ACK|PINGTYPE_UDP|PINGTYPE_SCTP_INIT))
return true;
/* A SYN scan will only generate raw packets if nmap is running as root.
Otherwise, it becomes a connect scan. */
if ((pingtype & PINGTYPE_TCP_USE_SYN) && isr00t)
return true;
return false;
}
void NmapOps::ValidateOptions() {
const char *privreq = "root privileges.";
#ifdef WIN32
if (!have_pcap)
privreq = "WinPcap version 3.1 or higher and\n\
iphlpapi.dll. You seem to be missing one or both of these. Winpcap is\n\
available from http://www.winpcap.org. iphlpapi.dll comes with Win98 and\n\
later operating sytems and NT 4.0 with SP4 or greater. For previous windows\n\
versions, you may be able to take iphlpapi.dll from another system and place\n\
it in your system32 dir (e.g. c:\\windows\\system32).\n\
On Windows Vista and Windows 7, The WinPcap NPF service must be started by an\n\
administrator before WinPcap can be used. Running nmap.exe will open a UAC\n\
dialog where you can start NPF if you have administrator privileges.";
#endif
/* Insure that at least one scantype is selected */
if (!noportscan && !(TCPScan() || UDPScan() || SCTPScan() || ipprotscan)) {
if (isr00t)
synscan++;
else connectscan++;
// if (verbose) error("No TCP, UDP, SCTP or ICMP scantype specified, assuming %s scan. Use -sn if you really don't want to portscan (and just want to see what hosts are up).", synscan? "SYN Stealth" : "vanilla tcp connect()");
}
if (pingtype != PINGTYPE_NONE && spoofsource) {
error("WARNING: If -S is being used to fake your source address, you may also have to use -e <interface> and -Pn . If you are using it to specify your real source address, you can ignore this warning.");
}
if (pingtype != PINGTYPE_NONE && idlescan) {
error("WARNING: Many people use -Pn w/Idlescan to prevent pings from their true IP. On the other hand, timing info Nmap gains from pings can allow for faster, more reliable scans.");
sleep(2); /* Give ppl a chance for ^C :) */
}
if (numdecoys > 1 && idlescan) {
error("WARNING: Your decoys won't be used in the Idlescan portion of your scanning (although all packets sent to the target are spoofed anyway");
}
if (connectscan && spoofsource) {
error("WARNING: -S will only affect the source address used in a connect() scan if you specify one of your own addresses. Use -sS or another raw scan if you want to completely spoof your source address, but then you need to know what you're doing to obtain meaningful results.");
}
if ((pingtype & PINGTYPE_UDP) && (!isr00t)) {
fatal("Sorry, UDP Ping (-PU) only works if you are root (because we need to read raw responses off the wire)");
}
if ((pingtype & PINGTYPE_SCTP_INIT) && (!isr00t)) {
fatal("Sorry, SCTP INIT Ping (-PY) only works if you are root (because we need to read raw responses off the wire)");
}
if ((pingtype & PINGTYPE_PROTO) && (!isr00t)) {
fatal("Sorry, IPProto Ping (-PO) only works if you are root (because we need to read raw responses off the wire)");
}
if (ipprotscan && (TCPScan() || UDPScan() || SCTPScan())) {
fatal("Sorry, the IPProtoscan (-sO) must currently be used alone rather than combined with other scan types.");
}
if (noportscan && (TCPScan() || UDPScan() || SCTPScan() || ipprotscan)) {
fatal("-sL and -sn (skip port scan) are not valid with any other scan types");
}
if (af() == AF_INET6 && (pingtype & (PINGTYPE_ICMP_MASK|PINGTYPE_ICMP_TS))) {
fatal("ICMP Timestamp and Address Mask pings are only valid for IPv4.");
}
if (sendpref == PACKET_SEND_NOPREF) {
#ifdef WIN32
sendpref = PACKET_SEND_ETH_STRONG;
#else
sendpref = PACKET_SEND_IP_WEAK;
#endif
}
/* We start with stuff users should not do if they are not root */
if (!isr00t) {
if (ackscan|finscan|idlescan|ipprotscan|maimonscan|nullscan|synscan|udpscan|windowscan|xmasscan|sctpinitscan|sctpcookieechoscan) {
fatal("You requested a scan type which requires %s", privreq);
}
if (numdecoys > 0) {
fatal("Sorry, but decoys (-D) require %s", privreq);
}
if (fragscan) {
fatal("Sorry, but fragscan requires %s", privreq);
}
if (osscan) {
fatal("TCP/IP fingerprinting (for OS scan) requires %s", privreq);
}
}
if (bouncescan && pingtype != PINGTYPE_NONE)
log_write(LOG_STDOUT, "Hint: if your bounce scan target hosts aren't reachable from here, remember to use -Pn so we don't try and ping them prior to the scan\n");
if (ackscan+bouncescan+connectscan+finscan+idlescan+maimonscan+nullscan+synscan+windowscan+xmasscan > 1)
fatal("You specified more than one type of TCP scan. Please choose only one of -sA, -b, -sT, -sF, -sI, -sM, -sN, -sS, -sW, and -sX");
if (numdecoys > 0 && (bouncescan || connectscan)) {
error("WARNING: Decoys are irrelevant to the bounce or connect scans");
}
if (fragscan && !(ackscan|finscan|maimonscan|nullscan|synscan|windowscan|xmasscan) && \
!(pingtype&(PINGTYPE_ICMP_TS|PINGTYPE_TCP)) && !(fragscan == 8 && pingtype&PINGTYPE_ICMP_MASK) && \
!(extra_payload_length + 8 > fragscan)) {
fatal("Fragscan only works with TCP, ICMP Timestamp or ICMP Mask (mtu=8) ping types or ACK, FIN, Maimon, NULL, SYN, Window, and XMAS scan types");
}
if (osscan && bouncescan)
error("Combining bounce scan with OS scan seems silly, but I will let you do whatever you want!");
#if !defined(LINUX) && !defined(OPENBSD) && !defined(FREEBSD) && !defined(NETBSD)
if (fragscan) {
error("Warning: Packet fragmentation selected on a host other than Linux, OpenBSD, FreeBSD, or NetBSD. This may or may not work.");
}
#endif
if (osscan && noportscan) {
fatal("WARNING: OS Scan is unreliable without a port scan. You need to use a scan type along with it, such as -sS, -sT, -sF, etc instead of -sn");
}
if (osscan && ipprotscan) {
error("WARNING: Disabling OS Scan (-O) as it is incompatible with the IPProto Scan (-sO)");
osscan = 0;
}
if (servicescan && ipprotscan) {
error("WARNING: Disabling Service Scan (-sV) as it is incompatible with the IPProto Scan (-sO)");
servicescan = 0;
}
if (servicescan && noportscan)
servicescan = 0;
if (defeat_rst_ratelimit && !synscan) {
fatal("Option --defeat-rst-ratelimit works only with a SYN scan (-sS)");
}
if (resume_ip.s_addr && generate_random_ips)
resume_ip.s_addr = 0;
if (magic_port_set && connectscan) {
error("WARNING: -g is incompatible with the default connect() scan (-sT). Use a raw scan such as -sS if you want to set the source port.");
}
if (max_parallelism && min_parallelism && (min_parallelism > max_parallelism)) {
fatal("--min-parallelism=%i must be less than or equal to --max-parallelism=%i",min_parallelism,max_parallelism);
}
if (min_packet_send_rate != 0.0 && max_packet_send_rate != 0.0 && min_packet_send_rate > max_packet_send_rate) {
fatal("--min-rate=%g must be less than or equal to --max-rate=%g", min_packet_send_rate, max_packet_send_rate);
}
if (af() == AF_INET6 && (generate_random_ips|numdecoys|bouncescan|fragscan|idlescan)) {
fatal("Sorry -- IPv6 support is currently only available for TCP, UDP, and SCTP port scans and list scan (-sL). OS detection, random targets and decoys are also not supported with IPv6. Further support is under consideration.");
}
if(ipoptions && osscan)
error("WARNING: Ip options are NOT used while OS scanning!");
#ifndef NOLUA
/* Make sure nmap.registry.args is available (even if it's empty) */
if (!scriptargs)
scriptargs = strdup("");
#endif
}
void NmapOps::setMaxOSTries(int mot) {
if (mot <= 0)
fatal("%s: value must be at least 1", __func__);
max_os_tries = mot;
}
void NmapOps::setMaxRttTimeout(int rtt)
{
if (rtt <= 0) fatal("%s: maximum round trip time must be greater than 0", __func__);
max_rtt_timeout = rtt;
if (rtt < min_rtt_timeout) min_rtt_timeout = rtt;
if (rtt < initial_rtt_timeout) initial_rtt_timeout = rtt;
}
void NmapOps::setMinRttTimeout(int rtt)
{
if (rtt < 0) fatal("%s: minimum round trip time must be at least 0", __func__);
min_rtt_timeout = rtt;
if (rtt > max_rtt_timeout) max_rtt_timeout = rtt;
if (rtt > initial_rtt_timeout) initial_rtt_timeout = rtt;
}
void NmapOps::setInitialRttTimeout(int rtt)
{
if (rtt <= 0) fatal("%s: initial round trip time must be greater than 0", __func__);
initial_rtt_timeout = rtt;
if (rtt > max_rtt_timeout) max_rtt_timeout = rtt;
if (rtt < min_rtt_timeout) min_rtt_timeout = rtt;
}
void NmapOps::setMaxRetransmissions(int max_retransmit)
{
if (max_retransmit < 0)
fatal("%s: must be positive", __func__);
max_retransmissions = max_retransmit;
}
void NmapOps::setMinHostGroupSz(unsigned int sz) {
if (sz > max_host_group_sz)
fatal("Minimum host group size may not be set to greater than maximum size (currently %d)\n", max_host_group_sz);
min_host_group_sz = sz;
}
void NmapOps::setMaxHostGroupSz(unsigned int sz) {
if (sz < min_host_group_sz)
fatal("Maximum host group size may not be set to less than the maximum size (currently %d)\n", min_host_group_sz);
if (sz <= 0)
fatal("Max host size must be at least 1");
max_host_group_sz = sz;
}
/* Sets the Name of the XML stylesheet to be printed in XML output.
If this is never called, a default stylesheet distributed with
Nmap is used. If you call it with NULL as the xslname, no
stylesheet line is printed. */
void NmapOps::setXSLStyleSheet(const char *xslname) {
if (xsl_stylesheet) free(xsl_stylesheet);
xsl_stylesheet = xslname? strdup(xslname) : NULL;
xsl_stylesheet_set = true;
}
/* Returns the full path or URL that should be printed in the XML
output xml-stylesheet element. Returns NULL if the whole element
should be skipped */
char *NmapOps::XSLStyleSheet() {
char tmpxsl[MAXPATHLEN];
if (xsl_stylesheet_set)
return xsl_stylesheet;
if (nmap_fetchfile(tmpxsl, sizeof(tmpxsl), "nmap.xsl") == 1) {
xsl_stylesheet = filename_to_url(tmpxsl);
} else {
#if WIN32
/* Use a relative URL on Windows if nmap_fetchfile failed. It won't work,
but it gives a clue that there is an nmap.xsl somewhere. */
Strncpy(tmpxsl, "nmap.xsl", sizeof(tmpxsl));
xsl_stylesheet = strdup(tmpxsl);
#else
Snprintf(tmpxsl, sizeof(tmpxsl), "%s/nmap.xsl", NMAPDATADIR);
xsl_stylesheet = filename_to_url(tmpxsl);
#endif
}
return xsl_stylesheet;
}
void NmapOps::setSpoofMACAddress(u8 *mac_data) {
memcpy(spoof_mac, mac_data, 6);
spoof_mac_set = true;
}
#ifndef NOLUA
void NmapOps::chooseScripts(char* argument) {
char *p;
for (;;) {
p = strchr(argument, ',');
if (p == NULL) {
chosenScripts.push_back(std::string(argument));
break;
} else {
chosenScripts.push_back(std::string(argument, p - argument));
argument = p + 1;
}
}
}
#endif
Jump to Line
Something went wrong with that request. Please try again.