/*************************************************************************** * ICMPv6Option.h -- The ICMPv6Option Class represents an ICMP version 6 * * option. It contains methods to set any header field. In general, these * * methods do error checkings and byte order conversion. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2022 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. 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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 __ICMPv6OPTION_H__ #define __ICMPv6OPTION_H__ 1 #include "NetworkLayerElement.h" /* Packet header diagrams included in this file have been taken from the * following IETF RFC documents: RFC 2461, RFC 2894 */ /* The following codes have been defined by IANA. A complete list may be found * at http://www.iana.org/assignments/icmpv6-parameters */ /* ICMPv6 Option Types */ #define ICMPv6_OPTION_SRC_LINK_ADDR 1 #define ICMPv6_OPTION_TGT_LINK_ADDR 2 #define ICMPv6_OPTION_PREFIX_INFO 3 #define ICMPv6_OPTION_REDIR_HDR 4 #define ICMPv6_OPTION_MTU 5 /* Nping ICMPv6Options Class internal definitions */ #define ICMPv6_OPTION_COMMON_HEADER_LEN 2 #define ICMPv6_OPTION_MIN_HEADER_LEN 8 #define ICMPv6_OPTION_SRC_LINK_ADDR_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6) #define ICMPv6_OPTION_TGT_LINK_ADDR_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6) #define ICMPv6_OPTION_PREFIX_INFO_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+30) #define ICMPv6_OPTION_REDIR_HDR_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6) #define ICMPv6_OPTION_MTU_LEN (ICMPv6_OPTION_COMMON_HEADER_LEN+6) /* This must the MAX() of all values defined above*/ #define ICMPv6_OPTION_MAX_MESSAGE_BODY (ICMPv6_OPTION_PREFIX_INFO_LEN-ICMPv6_OPTION_COMMON_HEADER_LEN) #define ICMPv6_OPTION_LINK_ADDRESS_LEN 6 class ICMPv6Option : public NetworkLayerElement { private: /**********************************************************************/ /* COMMON ICMPv6 OPTION HEADER */ /**********************************************************************/ struct nping_icmpv6_option{ u8 type; u8 length; u8 data[ICMPv6_OPTION_MAX_MESSAGE_BODY]; }__attribute__((__packed__)); typedef struct nping_icmpv6_option nping_icmpv6_option_t; /**********************************************************************/ /* ICMPv6 OPTION FORMATS */ /**********************************************************************/ /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ~ ... ~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ /* Source/Target Link-layer Address +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Link-Layer Address ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct link_addr_option{ u8 link_addr[6]; }__attribute__((__packed__)); typedef struct link_addr_option link_addr_option_t; /* Prefix Information +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Prefix Length |L|A| Reserved1 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Valid Lifetime | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Preferred Lifetime | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | + + | | + Prefix + | | + + | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct prefix_info_option{ u8 prefix_length; u8 flags; u32 valid_lifetime; u32 preferred_lifetime; u32 reserved; u8 prefix[16]; }__attribute__((__packed__)); typedef struct prefix_info_option prefix_info_option_t; /* Redirect Header +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | ~ IP header + data ~ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct redirect_option{ u16 reserved_1; u32 reserved_2; //u8 invoking_pkt[?]; }__attribute__((__packed__)); typedef struct redirect_option redirect_option_t; /* MTU +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MTU | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct mtu_option{ u16 reserved; u32 mtu; }__attribute__((__packed__)); typedef struct mtu_option mtu_option_t; nping_icmpv6_option_t h; link_addr_option_t *h_la; prefix_info_option_t *h_pi; redirect_option_t *h_r; mtu_option_t *h_mtu; public: ICMPv6Option(); ~ICMPv6Option(); void reset(); u8 *getBufferPointer(); int storeRecvData(const u8 *buf, size_t len); int protocol_id() const; int setType(u8 val); u8 getType(); bool validateType(u8 val); int setLength(u8 val); u8 getLength(); int setLinkAddress(u8* val); u8 *getLinkAddress(); int setPrefixLength(u8 val); u8 getPrefixLength(); int setFlags(u8 val); u8 getFlags(); int setValidLifetime(u32 val); u32 getValidLifetime(); int setPreferredLifetime(u32 val); u32 getPreferredLifetime(); int setPrefix(u8 *val); u8 *getPrefix(); int setMTU(u32 val); u32 getMTU(); int getHeaderLengthFromType(u8 type); }; /* End of class ICMPv6Option */ #endif