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| -rw-r--r-- | libnetutil/ICMPv6Option.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/libnetutil/ICMPv6Option.h b/libnetutil/ICMPv6Option.h new file mode 100644 index 0000000..91e1b97 --- /dev/null +++ b/libnetutil/ICMPv6Option.h @@ -0,0 +1,235 @@ +/*************************************************************************** + * 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) 1996-2023 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 __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 |