/*************************************************************************** * ProbeEngine.h -- Probe Mode is nping's default working mode. Basically, * * it involves sending the packets that the user requested at regular * * intervals and capturing responses from the wire. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2011 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, and version detection. * * * * 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 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. 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 as well as helping to * * fund the continued development of Nmap technology. 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. 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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. * * * ***************************************************************************/ #ifndef __PROBE_ENGINE_H__ #define __PROBE_ENGINE_H__ 1 #include "nping.h" #include "nsock.h" #include #include "TargetHost.h" #include "utils_net.h" #include "utils.h" using namespace std; /* DEFAULT_MAX__DESCRIPTORS. is a hardcoded value for the maximum number of * opened descriptors in the current system. Nping tries to determine that * limit at run time, but sometimes it can't and the limit defaults to * DEFAULT_MAX_DESCRIPTORS. */ #ifndef MACOSX #define DEFAULT_MAX_DESCRIPTORS 1024 #else #define DEFAULT_MAX_DESCRIPTORS 256 #endif /* When requesting a large number of descriptors from the system (TCP-connect * mode and UDP unprivileged mode), this is the number of descriptors that need * to be reserved for things like stdin, stdout, echo mode sockets, data files, * etc. */ #define RESERVED_DESCRIPTORS 8 /* Default timeout for UDP socket nsock_read() operations */ #define DEFAULT_UDP_READ_TIMEOUT_MS 1000 /* Amount of time we keep capturing responses after the last packet is sent, * providing we have no measured RTT for any of the hosts. */ #define DEFAULT_TIME_WAIT_AFTER_LAST_PACKET 1000 class ProbeEngine { public: struct timeval start_time; /* Time at which the engine was started */ struct timeval ts_last_sent; /* Time at which the engine was started */ private: nsock_pool nsp; /* Internal Nsock pool */ bool nsock_init; /* True if Nsock pool has been initialized */ vector pcap_iods; /* List of Nsock Pcap descriptors. */ int rawsd4; /* Raw socket descriptor for IPv4 */ int rawsd6; /* Raw socket descriptor for IPv6 */ nsock_iod *fds; /* IODs for multiple parallel connections */ int max_iods; /* Number of IODS in "fds" */ u32 packetno; /* Packets sent from this handler. */ public: ProbeEngine(); ~ProbeEngine(); void reset(); int init_nsock(); int start(vector &Targets, vector &Interfaces); int cleanup(); nsock_pool getNsockPool(); static char *bpf_filter(vector &Targets, NetworkInterface *target_interface); int setup_sniffer(vector &ifacelist, vectorbpf_filters); int send_packet(TargetHost *tgt, PacketElement *pkt, struct timeval *now); int do_unprivileged(int proto, TargetHost *tgt, u16 tport, u16 sport, struct timeval *now); int do_tcp_connect(TargetHost *tgt, u16 tport, u16 sport, struct timeval *now); int do_udp_unpriv(TargetHost *tgt, u16 tport, u16 sport, struct timeval *now); int packet_capture_handler(nsock_pool nsp, nsock_event nse, void *arg); int tcpconnect_handler(nsock_pool nsp, nsock_event nse, void *arg); int udpunpriv_handler(nsock_pool nsp, nsock_event nse, void *arg); static int delayed_output_handler(nsock_pool nsp, nsock_event nse, void *mydata); static int print_rcvd_pkt(PacketElement *pkt, double timestamp); }; /* End of class ProbeEngine */ /* Handlers and handler wrappers */ void interpacket_delay_wait_handler(nsock_pool nsp, nsock_event nse, void *arg); void packet_capture_handler_wrapper(nsock_pool nsp, nsock_event nse, void *arg); void tcpconnect_handler_wrapper(nsock_pool nsp, nsock_event nse, void *arg); void udpunpriv_handler_wrapper(nsock_pool nsp, nsock_event nse, void *arg); void delayed_output_handler_wrapper(nsock_pool nsp, nsock_event nse, void *arg); #endif /* __PROBE_ENGINE_H__ */