/*************************************************************************** * EchoServer.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 __ECHOSERVER_H__ #define __ECHOSERVER_H__ 1 #include "nping.h" #include "nsock.h" #include #include "NEPContext.h" #define LISTEN_QUEUE_SIZE 10 class EchoServer { private: /* Attributes */ std::vector client_ctx; clientid_t client_id_count; /* Methods */ int nep_listen_socket(); int addClientContext(NEPContext ctx); NEPContext *getClientContext(clientid_t clnt); NEPContext *getClientContext(nsock_iod iod); int destroyClientContext(clientid_t clnt); nsock_iod getClientNsockIOD(clientid_t clnt); clientid_t getNewClientID(); clientid_t nep_match_packet(const u8 *pkt, size_t pktlen); clientid_t nep_match_headers(IPv4Header *ip4, IPv6Header *ip6, TCPHeader *tcp, UDPHeader *udp, ICMPv4Header *icmp4, RawData *payload); int parse_hs_client(u8 *pkt, size_t pktlen, NEPContext *ctx); int parse_packet_spec(u8 *pkt, size_t pktlen, NEPContext *ctx); int generate_hs_server(EchoHeader *h, NEPContext *ctx); int generate_hs_final(EchoHeader *h, NEPContext *ctx); int generate_ready(EchoHeader *h, NEPContext *ctx); int generate_echo(EchoHeader *h, const u8 *pkt, size_t pktlen, NEPContext *ctx); public: EchoServer(); ~EchoServer(); void reset(); int start(); int cleanup(); int nep_capture_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_echo_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_hs_server_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_hs_client_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_hs_final_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_packetspec_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_ready_handler(nsock_pool nsp, nsock_event nse, void *param); int nep_session_ended_handler(nsock_pool nsp, nsock_event nse, void *param); }; /* End of class EchoServer */ typedef struct handler_arg{ EchoServer *me; void *param; } handler_arg_t; /* Handler wrappers */ void capture_handler(nsock_pool nsp, nsock_event nse, void *arg); void echo_handler(nsock_pool nsp, nsock_event nse, void *arg); void hs_server_handler(nsock_pool nsp, nsock_event nse, void *arg); void hs_client_handler(nsock_pool nsp, nsock_event nse, void *arg); void hs_final_handler(nsock_pool nsp, nsock_event nse, void *arg); void packetspec_handler(nsock_pool nsp, nsock_event nse, void *arg); void ready_handler(nsock_pool nsp, nsock_event nse, void *arg); void empty_handler(nsock_pool nsp, nsock_event nse, void *arg); void session_ended_handler(nsock_pool nsp, nsock_event nse, void *arg); #endif /* __ECHOSERVER_H__ */