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TargetGroup.h
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TargetGroup.h
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/***************************************************************************
* TargetGroup.h -- The "TargetGroup" class holds a group of IP addresses, *
* such as those from a '/16' or '10.*.*.*' specification. It also has a *
* trivial HostGroupState class which handles a bunch of expressions that *
* go into TargetGroup classes. *
* *
***********************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 *
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* 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: *
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* As a special exception to the GPL terms, Insecure.Com LLC grants *
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* Source is provided to this software because we believe users have a *
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* *
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* occasionally relicense the code to third parties as discussed above. *
* If you wish to specify special license conditions of your *
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* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* *
***************************************************************************/
/* $Id$ */
#ifndef TARGETGROUP_H
#define TARGETGROUP_H
#include <list>
#include <queue>
#include <set>
#include <string>
#include "nmap.h"
class TargetGroup {
public:
/* used by get_target_types */
enum _targets_types { TYPE_NONE, IPV4_NETMASK, IPV4_RANGES, IPV6_NETMASK };
/* used as input to skip range */
enum _octet_nums { FIRST_OCTET, SECOND_OCTET, THIRD_OCTET };
TargetGroup();
/* Initializes (or reinitializes) the object with a new expression,
such as 192.168.0.0/16 , 10.1.0-5.1-254 , or
fe80::202:e3ff:fe14:1102 . The af parameter is AF_INET or
AF_INET6 Returns 0 for success */
int parse_expr(const char *target_expr, int af);
/* Grab the next host from this expression (if any). Returns 0 and
fills in ss if successful. ss must point to a pre-allocated
sockaddr_storage structure */
int get_next_host(struct sockaddr_storage *ss, size_t *sslen);
/* Returns the last given host, so that it will be given again next
time get_next_host is called. Obviously, you should only call
this if you have fetched at least 1 host since parse_expr() was
called */
int return_last_host();
/* Returns true iff the given address is the one that was resolved to create
this target group; i.e., not one of the addresses derived from it with a
netmask. */
bool is_resolved_address(const struct sockaddr_storage *ss);
/* Return a string of the name or address that was resolved for this group. */
const char *get_resolved_name(void);
/* Return the list of addresses that the name for this group resolved to, if
it came from a name resolution. */
const std::list<struct sockaddr_storage> &get_resolved_addrs(void);
/* return the target type */
char get_targets_type() {
return targets_type;
};
/* get the netmask */
int get_mask() {
return netmask;
};
/* is the current expression a named host */
int get_namedhost() {
return namedhost;
};
private:
enum _targets_types targets_type;
void Initialize();
std::list<struct sockaddr_storage> resolvedaddrs;
u32 netmask;
std::string resolvedname;
/* These are used for the '/mask' style of specifying target
net (IPV4_NETMASK) */
struct in_addr startaddr;
struct in_addr currentaddr;
struct in_addr endaddr;
// These three are for the '138.1-7,16,91-95,200-.12.1' style (IPV4_RANGES)
u8 addresses[4][256];
unsigned int current[4];
u8 last[4];
#if HAVE_IPV6
/* These are used for the '/mask' style of specifying target
net (IPV6_NETMASK) */
struct sockaddr_in6 ip6;
struct in6_addr startaddr6;
struct in6_addr currentaddr6;
struct in6_addr endaddr6;
#endif
/* Is set to true iff all the addresses in this group have already been
returned. */
bool exhausted;
/* is the current target expression a named host? */
int namedhost;
};
/* Adding new targets is for NSE scripts */
class NewTargets {
public:
NewTargets();
/* return a previous inserted target */
static std::string read (void);
/* clear the scanned_targets_cache */
static void clear (void);
/* get the number of all new added targets */
static unsigned long get_number (void);
/* get the number that have been scanned */
static unsigned long get_scanned (void);
/* get the number of queued targets left to scan */
static unsigned long get_queued (void);
/* get the new_targets object */
static NewTargets *get (void);
/* insert targets to the new_targets_queue */
static unsigned long insert (const char *target);
private:
/* unsigned long mex_new_targets; */
/* A queue to push new targets that were discovered by NSE scripts.
* Nmap will pop future targets from this queue. */
std::queue<std::string> queue;
/* A cache to save scanned targets specifiactions.
* (These are targets that were pushed to Nmap scan queue) */
std::set<std::string> history;
void Initialize();
/* Save new targets onto the queue */
unsigned long push (const char *target);
protected:
static NewTargets *new_targets;
};
class HostGroupState {
public:
HostGroupState(int lookahead, int randomize, char *target_expressions[],
int num_expressions);
~HostGroupState();
Target **hostbatch;
int max_batch_sz; /* The size of the hostbatch[] array */
int current_batch_sz; /* The number of VALID members of hostbatch[] */
int next_batch_no; /* The index of the next hostbatch[] member to be given
back to the user */
int randomize; /* Whether each batch should be "shuffled" prior to the ping
scan (they will also be out of order when given back one
at a time to the client program */
char **target_expressions; /* An array of target expression strings, passed
to us by the client (client is also in charge
of deleting it AFTER it is done with the
hostgroup_state */
int num_expressions; /* The number of valid expressions in
target_expressions member above */
int next_expression; /* The index of the next expression we have
to handle */
TargetGroup current_expression; /* For batch chunking -- targets in queue */
};
#endif /* TARGETGROUP_H */