/***************************************************************************
* nmap_dns.h -- Handles parallel reverse DNS resolution for target IPs *
* *
***********************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) *
* *
***************************************************************************/
#ifndef NMAP_DNS_H
#define NMAP_DNS_H
class Target;
#include "nbase/nbase.h"
#include <string>
#include <list>
#include <algorithm>
#include <sstream>
namespace DNS
{
#define DNS_CHECK_ACCUMLATE(accumulator, tmp, exp) \
do { tmp = exp; if(tmp < 1) return 0 ; accumulator += tmp;} while(0)
#define DNS_CHECK_UPPER_BOUND(accumulator, max)\
do { if(accumulator > max) return 0; } while(0)
#define DNS_HAS_FLAG(v,flag) ((v&flag)==flag)
#define DNS_HAS_ERR(v, err) ((v&DNS::ERR_ALL)==err)
typedef enum
{
ID = 0,
FLAGS_OFFSET = 2,
QDCOUNT = 4,
ANCOUNT = 6,
NSCOUNT = 8,
ARCOUNT = 10,
DATA = 12
} HEADER_OFFSET;
typedef enum {
ERR_ALL = 0x0007,
CHECKING_DISABLED = 0x0010,
AUTHENTICATED_DATA = 0x0020,
ZERO = 0x0070,
RECURSION_AVAILABLE = 0x0080,
RECURSION_DESIRED = 0x0100,
TRUNCATED = 0x0200,
AUTHORITATIVE_ANSWER = 0x0400,
OP_STANDARD_QUERY = 0x0000,
OP_INVERSE_QUERY = 0x0800, // Obsoleted in RFC 3425
OP_SERVER_STATUS = 0x1000,
RESPONSE = 0x8000
} FLAGS;
typedef enum {
ERR_NO = 0x0000,
ERR_FORMAT = 0x0001,
ERR_SERVFAIL = 0x0002,
ERR_NAME = 0x0003,
ERR_NOT_IMPLEMENTED = 0x0004,
ERR_REFUSED = 0x0005,
} ERRORS;
typedef enum {
A = 1,
CNAME = 5,
PTR = 12,
AAAA = 28,
} RECORD_TYPE;
typedef enum {
CLASS_IN = 1
} RECORD_CLASS;
const u8 COMPRESSED_NAME = 0xc0;
const std::string IPV4_PTR_DOMAIN = ".in-addr.arpa";
const std::string IPV6_PTR_DOMAIN = ".ip6.arpa";
class Factory
{
public:
static u16 progressiveId;
static bool ipToPtr(const sockaddr_storage &ip, std::string &ptr);
static bool ptrToIp(const std::string &ptr, sockaddr_storage &ip);
static size_t buildSimpleRequest(const std::string &name, RECORD_TYPE rt, u8 *buf, size_t maxlen);
static size_t buildReverseRequest(const sockaddr_storage &ip, u8 *buf, size_t maxlen);
static size_t putUnsignedShort(u16 num, u8 *buf, size_t offset, size_t maxlen);
static size_t putDomainName(const std::string &name, u8 *buf, size_t offset, size_t maxlen);
static size_t parseUnsignedShort(u16 &num, const u8 *buf, size_t offset, size_t maxlen);
static size_t parseUnsignedInt(u32 &num, const u8 *buf, size_t offset, size_t maxlen);
static size_t parseDomainName(std::string &name, const u8 *buf, size_t offset, size_t maxlen);
};
class Record
{
public:
virtual Record * clone() = 0;
virtual ~Record() {}
virtual size_t parseFromBuffer(const u8 *buf, size_t offset, size_t maxlen) = 0;
};
class A_Record : public Record
{
public:
sockaddr_storage value;
Record * clone() { return new A_Record(*this); }
~A_Record() {}
size_t parseFromBuffer(const u8 *buf, size_t offset, size_t maxlen);
};
class PTR_Record : public Record
{
public:
std::string value;
Record * clone() { return new PTR_Record(*this); }
~PTR_Record() {}
size_t parseFromBuffer(const u8 *buf, size_t offset, size_t maxlen)
{
return Factory::parseDomainName(value, buf, offset, maxlen);
}
};
class CNAME_Record : public Record
{
public:
std::string value;
Record * clone() { return new CNAME_Record(*this); }
~CNAME_Record() {}
size_t parseFromBuffer(const u8 *buf, size_t offset, size_t maxlen)
{
return Factory::parseDomainName(value, buf, offset, maxlen);
}
};
class Query
{
public:
std::string name;
u16 record_type;
u16 record_class;
size_t parseFromBuffer(const u8 *buf, size_t offset, size_t maxlen);
};
class Answer
{
public:
Answer() : record(NULL) {}
Answer(const Answer &c) : name(c.name), record_type(c.record_type),
record_class(c.record_class), ttl(c.ttl), length(c.length),
record(c.record->clone()) {}
~Answer() { delete record; }
std::string name;
u16 record_type;
u16 record_class;
u32 ttl;
u16 length;
Record * record;
// Populate the object reading from buffer and returns "consumed" bytes
size_t parseFromBuffer(const u8 *buf, size_t offset, size_t maxlen);
Answer& operator=(const Answer &r);
};
class Packet
{
public:
Packet() : id(0), flags(0) {}
~Packet() {}
void addFlags(FLAGS fl){ flags |= fl; }
void removeFlags(FLAGS fl){ flags &= ~fl; }
void resetFlags() { flags = 0; }
size_t writeToBuffer(u8 *buf, size_t maxlen);
size_t parseFromBuffer(const u8 *buf, size_t maxlen);
u16 id;
u16 flags;
std::list<Query> queries;
std::list<Answer> answers;
};
}
void nmap_mass_rdns(Target ** targets, int num_targets);
std::list<std::string> get_dns_servers();
#endif