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118 lines
5 KiB
C++
118 lines
5 KiB
C++
/***************************************************************************
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*
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* The Nmap Security Scanner is (C) 1996-2026 Nmap Software LLC ("The Nmap
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* Project"). Nmap is also a registered trademark of the Nmap Project.
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*
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* This program is distributed under the terms of the Nmap Public Source
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* License (NPSL). The exact license text applying to a particular Nmap
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* release or source code control revision is contained in the LICENSE
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* file distributed with that version of Nmap or source code control
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* revision. More Nmap copyright/legal information is available from
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* https://nmap.org/book/man-legal.html, and further information on the
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* NPSL license itself can be found at https://nmap.org/npsl/ . This
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* header summarizes some key points from the Nmap license, but is no
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* substitute for the actual license text.
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*
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* Nmap is generally free for end users to download and use themselves,
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* including commercial use. It is available from https://nmap.org.
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*
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* The Nmap license generally prohibits companies from using and
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* redistributing Nmap in commercial products, but we sell a special Nmap
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* OEM Edition with a more permissive license and special features for
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* this purpose. See https://nmap.org/oem/
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*
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* If you have received a written Nmap license agreement or contract
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* stating terms other than these (such as an Nmap OEM license), you may
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* choose to use and redistribute Nmap under those terms instead.
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*
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* The official Nmap Windows builds include the Npcap software
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* (https://npcap.com) for packet capture and transmission. It is under
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* separate license terms which forbid redistribution without special
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* permission. So the official Nmap Windows builds may not be redistributed
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* without special permission (such as an Nmap OEM license).
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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.
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*
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* Source code also allows you to port Nmap to new platforms, fix bugs, and
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* add new features. You are highly encouraged to submit your changes as a
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* Github PR or by email to the dev@nmap.org mailing list for possible
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* incorporation into the main distribution. Unless you specify otherwise, it
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* is understood that you are offering us very broad rights to use your
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* submissions as described in the Nmap Public Source License Contributor
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* Agreement. This is important because we fund the project by selling licenses
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* with various terms, and also because the inability to relicense code has
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* caused devastating problems for other Free Software projects (such as KDE
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* and NASM).
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*
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* The free version of Nmap is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties,
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* indemnification and commercial support are all available through the
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* Npcap OEM program--see https://nmap.org/oem/
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*
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***************************************************************************/
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#ifndef NETUTIL_NETBLOCK_H
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#define NETUTIL_NETBLOCK_H
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#include <string>
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#include <list>
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#include <vector>
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#include "massdns.h"
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class NetBlock {
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public:
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virtual ~NetBlock() {}
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NetBlock(bool r_a=false, const char *dev=NULL)
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: resolve_all(r_a), device(dev)
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{
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current_addr = resolvedaddrs.begin();
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}
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std::string hostname;
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std::list<struct sockaddr_storage> resolvedaddrs;
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std::list<struct sockaddr_storage> unscanned_addrs;
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std::list<struct sockaddr_storage>::const_iterator current_addr;
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/* Parses an expression such as 192.168.0.0/16, 10.1.0-5.1-254, or
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fe80::202:e3ff:fe14:1102/112 and returns a newly allocated NetBlock. The af
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parameter is AF_INET or AF_INET6. Returns NULL in case of error. */
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static NetBlock *parse_expr(const char *target_expr, int af, std::vector<DNS::Request> &requests, bool resolve_all=false, const char *device=NULL);
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bool is_resolved_address(const struct sockaddr_storage *ss) const;
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/* For NetBlock subclasses that need to "resolve" themselves into a different
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* NetBlock subclass, override this method. Otherwise, it's safe to reassign
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* the return value to the pointer that this method was called through.
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* On error, return NULL. */
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virtual NetBlock *resolve(const DNS::Request &req) { return this; }
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virtual void reject_last_host() {}
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virtual bool next(struct sockaddr_storage *ss, size_t *sslen) = 0;
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virtual void apply_netmask(int bits) = 0;
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virtual std::string str() const = 0;
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protected:
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bool resolve_all;
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const char *device;
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};
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class NetBlockRandomIPv4 : public NetBlock {
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public:
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NetBlockRandomIPv4();
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void reject_last_host() { if (!infinite) count++; }
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void set_num_random(unsigned long num) {
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if (num == 0)
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infinite = true;
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else
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count = num;
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}
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bool next(struct sockaddr_storage *ss, size_t *sslen);
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void apply_netmask(int bits) {}
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std::string str() const {return "Random IPv4 addresses";}
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private:
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struct sockaddr_in base;
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unsigned long count;
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bool infinite;
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};
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#endif
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