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237 lines
10 KiB
C++
237 lines
10 KiB
C++
/***************************************************************************
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* ICMPv6Option.h -- The ICMPv6Option Class represents an ICMP version 6 *
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* option. It contains methods to set any header field. In general, these *
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* methods do error checkings and byte order conversion. *
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* *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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*
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* The Nmap Security Scanner is (C) 1996-2025 Nmap Software LLC ("The Nmap
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* Project"). Nmap is also a registered trademark of the Nmap Project.
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*
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* This program is distributed under the terms of the Nmap Public Source
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* License (NPSL). The exact license text applying to a particular Nmap
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* release or source code control revision is contained in the LICENSE
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* file distributed with that version of Nmap or source code control
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* revision. More Nmap copyright/legal information is available from
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* https://nmap.org/book/man-legal.html, and further information on the
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* NPSL license itself can be found at https://nmap.org/npsl/ . This
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* header summarizes some key points from the Nmap license, but is no
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* substitute for the actual license text.
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*
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* Nmap is generally free for end users to download and use themselves,
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* including commercial use. It is available from https://nmap.org.
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*
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* The Nmap license generally prohibits companies from using and
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* redistributing Nmap in commercial products, but we sell a special Nmap
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* OEM Edition with a more permissive license and special features for
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* this purpose. See https://nmap.org/oem/
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*
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* If you have received a written Nmap license agreement or contract
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* stating terms other than these (such as an Nmap OEM license), you may
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* choose to use and redistribute Nmap under those terms instead.
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*
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* The official Nmap Windows builds include the Npcap software
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* (https://npcap.com) for packet capture and transmission. It is under
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* separate license terms which forbid redistribution without special
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* permission. So the official Nmap Windows builds may not be redistributed
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* without special permission (such as an Nmap OEM license).
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*
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* Source is provided to this software because we believe users have a
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* right to know exactly what a program is going to do before they run it.
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* This also allows you to audit the software for security holes.
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*
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* Source code also allows you to port Nmap to new platforms, fix bugs, and
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* add new features. You are highly encouraged to submit your changes as a
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* Github PR or by email to the dev@nmap.org mailing list for possible
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* incorporation into the main distribution. Unless you specify otherwise, it
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* is understood that you are offering us very broad rights to use your
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* submissions as described in the Nmap Public Source License Contributor
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* Agreement. This is important because we fund the project by selling licenses
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* with various terms, and also because the inability to relicense code has
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* caused devastating problems for other Free Software projects (such as KDE
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* and NASM).
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*
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* The free version of Nmap is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties,
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* indemnification and commercial support are all available through the
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* Npcap OEM program--see https://nmap.org/oem/
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*
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***************************************************************************/
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/* This code was originally part of the Nping tool. */
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#ifndef __ICMPv6OPTION_H__
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#define __ICMPv6OPTION_H__ 1
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#include "NetworkLayerElement.h"
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/* Packet header diagrams included in this file have been taken from the
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* following IETF RFC documents: RFC 2461, RFC 2894 */
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/* The following codes have been defined by IANA. A complete list may be found
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* at http://www.iana.org/assignments/icmpv6-parameters */
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/* ICMPv6 Option Types */
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#define ICMPv6_OPTION_SRC_LINK_ADDR 1
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#define ICMPv6_OPTION_TGT_LINK_ADDR 2
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#define ICMPv6_OPTION_PREFIX_INFO 3
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#define ICMPv6_OPTION_REDIR_HDR 4
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#define ICMPv6_OPTION_MTU 5
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/* Nping ICMPv6Options Class internal definitions */
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#define ICMPv6_OPTION_COMMON_HEADER_LEN 2
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#define ICMPv6_OPTION_MIN_HEADER_LEN 8
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#define ICMPv6_OPTION_SRC_LINK_ADDR_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6)
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#define ICMPv6_OPTION_TGT_LINK_ADDR_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6)
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#define ICMPv6_OPTION_PREFIX_INFO_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+30)
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#define ICMPv6_OPTION_REDIR_HDR_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6)
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#define ICMPv6_OPTION_MTU_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6)
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/* This must the MAX() of all values defined above*/
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#define ICMPv6_OPTION_MAX_MESSAGE_BODY (ICMPv6_OPTION_PREFIX_INFO_LEN-ICMPv6_OPTION_COMMON_HEADER_LEN)
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#define ICMPv6_OPTION_LINK_ADDRESS_LEN 6
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class ICMPv6Option : public NetworkLayerElement {
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private:
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/**********************************************************************/
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/* COMMON ICMPv6 OPTION HEADER */
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/**********************************************************************/
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struct nping_icmpv6_option{
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u8 type;
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u8 length;
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u8 data[ICMPv6_OPTION_MAX_MESSAGE_BODY];
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}__attribute__((__packed__));
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typedef struct nping_icmpv6_option nping_icmpv6_option_t;
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/**********************************************************************/
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/* ICMPv6 OPTION FORMATS */
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/**********************************************************************/
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/* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Length | ... |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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~ ... ~
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
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/* Source/Target Link-layer Address
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Length | Link-Layer Address ...
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
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struct link_addr_option{
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u8 link_addr[6];
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}__attribute__((__packed__));
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typedef struct link_addr_option link_addr_option_t;
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/* Prefix Information
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Length | Prefix Length |L|A| Reserved1 |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Valid Lifetime |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Preferred Lifetime |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Reserved2 |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| |
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+ +
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+ Prefix +
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+ +
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
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struct prefix_info_option{
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u8 prefix_length;
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u8 flags;
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u32 valid_lifetime;
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u32 preferred_lifetime;
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u32 reserved;
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u8 prefix[16];
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}__attribute__((__packed__));
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typedef struct prefix_info_option prefix_info_option_t;
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/* Redirect Header
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Length | Reserved |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Reserved |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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~ IP header + data ~
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
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struct redirect_option{
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u16 reserved_1;
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u32 reserved_2;
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//u8 invoking_pkt[?];
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}__attribute__((__packed__));
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typedef struct redirect_option redirect_option_t;
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/* MTU
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Length | Reserved |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| MTU |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
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struct mtu_option{
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u16 reserved;
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u32 mtu;
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}__attribute__((__packed__));
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typedef struct mtu_option mtu_option_t;
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nping_icmpv6_option_t h;
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link_addr_option_t *h_la;
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prefix_info_option_t *h_pi;
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redirect_option_t *h_r;
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mtu_option_t *h_mtu;
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public:
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ICMPv6Option();
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~ICMPv6Option();
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void reset();
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u8 *getBufferPointer();
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int storeRecvData(const u8 *buf, size_t len);
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int protocol_id() const;
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int setType(u8 val);
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u8 getType();
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bool validateType(u8 val);
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int setLength(u8 val);
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u8 getLength();
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int setLinkAddress(u8* val);
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u8 *getLinkAddress();
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int setPrefixLength(u8 val);
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u8 getPrefixLength();
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int setFlags(u8 val);
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u8 getFlags();
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int setValidLifetime(u32 val);
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u32 getValidLifetime();
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int setPreferredLifetime(u32 val);
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u32 getPreferredLifetime();
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int setPrefix(u8 *val);
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u8 *getPrefix();
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int setMTU(u32 val);
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u32 getMTU();
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int getHeaderLengthFromType(u8 type);
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}; /* End of class ICMPv6Option */
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#endif
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