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Diffstat (limited to 'nping/EchoClient.h')
| -rw-r--r-- | nping/EchoClient.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/nping/EchoClient.h b/nping/EchoClient.h new file mode 100644 index 0000000..7b27594 --- /dev/null +++ b/nping/EchoClient.h @@ -0,0 +1,131 @@ + +/*************************************************************************** + * EchoClient.h -- * + * * + ***********************IMPORTANT NMAP LICENSE TERMS************************ + * + * The Nmap Security Scanner is (C) 1996-2023 Nmap Software 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.com) 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__ */ |