From 0d47952611198ef6b1163f366dc03922d20b1475 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 09:42:04 +0200 Subject: Adding upstream version 7.94+git20230807.3be01efb1+dfsg. Signed-off-by: Daniel Baumann --- libnetutil/UDPHeader.h | 127 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 libnetutil/UDPHeader.h (limited to 'libnetutil/UDPHeader.h') diff --git a/libnetutil/UDPHeader.h b/libnetutil/UDPHeader.h new file mode 100644 index 0000000..970ef84 --- /dev/null +++ b/libnetutil/UDPHeader.h @@ -0,0 +1,127 @@ +/*************************************************************************** + * UDPHeader.h -- The UDPHeader Class represents a UDP packet. It contains * + * methods to set the different header fields. These methods tipically * + * perform the necessary error checks and byte order conversions. * + * * + ***********************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/ + * + ***************************************************************************/ +/* This code was originally part of the Nping tool. */ + +#ifndef UDPHEADER_H +#define UDPHEADER_H 1 + +#include "TransportLayerElement.h" + +#define UDP_HEADER_LEN 8 + +/* Default header values */ +#define UDP_DEFAULT_SPORT 53 +#define UDP_DEFAULT_DPORT 53 + +class UDPHeader : public TransportLayerElement { + + private: + /* + 0 1 2 3 + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Source Port | Destination Port | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Length | Checksum | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + struct nping_udp_hdr{ + u16 uh_sport; + u16 uh_dport; + u16 uh_ulen; + u16 uh_sum; + }__attribute__((__packed__)); + + typedef struct nping_udp_hdr nping_udp_hdr_t; + + nping_udp_hdr_t h; + + public: + + UDPHeader(); + ~UDPHeader(); + void reset(); + u8 *getBufferPointer(); + int storeRecvData(const u8 *buf, size_t len); + int protocol_id() const; + int validate(); + int print(FILE *output, int detail) const; + + int setSourcePort(u16 p); + u16 getSourcePort() const; + + int setDestinationPort(u16 p); + u16 getDestinationPort() const; + + int setTotalLength(); + int setTotalLength(u16 l); + u16 getTotalLength() const; + + int setSum(struct in_addr source, struct in_addr destination); + int setSum(u16 s); + int setSum(); + int setSumRandom(); + int setSumRandom(struct in_addr source, struct in_addr destination); + u16 getSum() const; + +}; /* End of class UDPHeader */ + + +#endif -- cgit v1.2.3