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/***************************************************************************
* 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. 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
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