/*************************************************************************** * EchoClient.h -- * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2020 Insecure.Com LLC ("The Nmap * * Project"). Nmap is also a registered trademark of the Nmap Project. * * * * This program is distributed under the terms of the Nmap Public Source * * License (NPSL). The exact license text applying to a particular Nmap * * release or source code control revision is contained in the LICENSE * * file distributed with that version of Nmap or source code control * * revision. More Nmap copyright/legal information is available from * * https://nmap.org/book/man-legal.html, and further information on the * * NPSL license itself can be found at https://nmap.org/npsl. This header * * summarizes some key points from the Nmap license, but is no substitute * * for the actual license text. * * * * Nmap is generally free for end users to download and use themselves, * * including commercial use. It is available from https://nmap.org. * * * * The Nmap license generally prohibits companies from using and * * redistributing Nmap in commercial products, but we sell a special Nmap * * OEM Edition with a more permissive license and special features for * * this purpose. See https://nmap.org/oem * * * * If you have received a written Nmap license agreement or contract * * stating terms other than these (such as an Nmap OEM license), you may * * choose to use and redistribute Nmap under those terms instead. * * * * The official Nmap Windows builds include the Npcap software * * (https://npcap.org) for packet capture and transmission. It is under * * separate license terms which forbid redistribution without special * * permission. So the official Nmap Windows builds may not be * * redistributed without special permission (such as an Nmap OEM * * license). * * * * 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 submit your * * changes as a Github PR or by email to the dev@nmap.org mailing list * * for possible incorporation into the main distribution. Unless you * * specify otherwise, it is understood that you are offering us very * * broad rights to use your submissions as described in the Nmap Public * * Source License Contributor Agreement. This is important because we * * fund the project by selling licenses with various terms, and also * * because the inability to relicense code has caused devastating * * problems for other Free Software projects (such as KDE and NASM). * * * * The free version of Nmap 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. Warranties, * * indemnification and commercial support are all available through the * * Npcap OEM program--see https://nmap.org/oem. * * * ***************************************************************************/ #ifndef __ECHOCLIENT_H__ #define __ECHOCLIENT_H__ 1 #include "nping.h" #include "NpingTarget.h" #include "NEPContext.h" #include "ProbeMode.h" #define ECHO_CONNECT_TIMEOUT (10*1000) /* 10 Seconds */ #define ECHO_READ_TIMEOUT (10*1000) #define ECHO_WRITE_TIMEOUT (10*1000) /* Max number of bytes that are supplied as data for the PAYLOAD_MAGIC specifier */ #define NEP_PAYLOADMAGIC_MAX_BYTES 8 class EchoClient { private: /* Attributes */ nsock_pool nsp; /**< Nsock pool (shared with ProbeMode) */ nsock_iod nsi; /**< IOD for the side-channel tcp socket*/ struct sockaddr_in srvaddr4; /**< Server's IPv4 address */ struct sockaddr_in6 srvaddr6; /**< Server's IPv6 address */ int af; /**< Address family (AF_INET or AF_INET6)*/ NEPContext ctx; ProbeMode probe; u8 lasthdr[MAX_NEP_PACKET_LENGTH]; size_t readbytes; /* Methods */ int nep_connect(NpingTarget *target, u16 port); int nep_handshake(); int nep_send_packet_spec(); int nep_recv_ready(); int nep_recv_echo(u8 *packet, size_t packetlen); int parse_hs_server(u8 *pkt, size_t pktlen); int parse_hs_final(u8 *pkt, size_t pktlen); int parse_ready(u8 *pkt, size_t pktlen); int parse_echo(u8 *pkt, size_t pktlen); int parse_error(u8 *pkt, size_t pktlen); int generate_hs_client(EchoHeader *h); int generate_packet_spec(EchoHeader *h); public: EchoClient(); ~EchoClient(); void reset(); int start(NpingTarget *target, u16 port); int cleanup(); int nep_echoed_packet_handler(nsock_pool nsp, nsock_event nse, void *arg); int nep_recv_std_header_handler(nsock_pool nsp, nsock_event nse, void *arg); int nep_recv_hs_server_handler(nsock_pool nsp, nsock_event nse, void *arg); int nep_recv_hs_final_handler(nsock_pool nsp, nsock_event nse, void *arg); int nep_recv_ready_handler(nsock_pool nsp, nsock_event nse, void *arg); }; /* End of class EchoClient */ /* Handler wrappers */ void echoed_packet_handler(nsock_pool nsp, nsock_event nse, void *arg); void recv_std_header_handler(nsock_pool nsp, nsock_event nse, void *arg); void connect_done_handler(nsock_pool nsp, nsock_event nse, void *arg); void write_done_handler(nsock_pool nsp, nsock_event nse, void *arg); void recv_hs_server_handler(nsock_pool nsp, nsock_event nse, void *arg); void recv_hs_final_handler(nsock_pool nsp, nsock_event nse, void *arg); void recv_ready_handler(nsock_pool nsp, nsock_event nse, void *arg); #endif /* __ECHOCLIENT_H__ */