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nmap/libnetutil/ICMPv4Header.h

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/***************************************************************************
* ICMPv4Header.h -- The ICMPv4Header Class represents an ICMP version 4 *
* packet. 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) 1996-2018 Insecure.Com LLC ("The Nmap *
* Project"). Nmap is also a registered trademark of the Nmap Project. *
* This program is free software; you may redistribute and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE *
* CLARIFICATIONS AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your *
* right to use, modify, and redistribute this software under certain *
* conditions. If you wish to embed Nmap technology into proprietary *
* software, we sell alternative licenses (contact sales@nmap.com). *
* Dozens of software vendors already license Nmap technology such as *
* host discovery, port scanning, OS detection, version detection, and *
* the Nmap Scripting Engine. *
* *
* Note that the GPL places important restrictions on "derivative works", *
* yet it does not provide a detailed definition of that term. To avoid *
* misunderstandings, we interpret that term as broadly as copyright law *
* allows. For example, we consider an application to constitute a *
* derivative work for the purpose of this license if it does any of the *
* following with any software or content covered by this license *
* ("Covered Software"): *
* *
* o Integrates source code from Covered Software. *
* *
* o Reads or includes copyrighted data files, such as Nmap's nmap-os-db *
* or nmap-service-probes. *
* *
* o Is designed specifically to execute Covered Software and parse the *
* results (as opposed to typical shell or execution-menu apps, which will *
* execute anything you tell them to). *
* *
* o Includes Covered Software in a proprietary executable installer. The *
* installers produced by InstallShield are an example of this. Including *
* Nmap with other software in compressed or archival form does not *
* trigger this provision, provided appropriate open source decompression *
* or de-archiving software is widely available for no charge. For the *
* purposes of this license, an installer is considered to include Covered *
* Software even if it actually retrieves a copy of Covered Software from *
* another source during runtime (such as by downloading it from the *
* Internet). *
* *
* o Links (statically or dynamically) to a library which does any of the *
* above. *
* *
* o Executes a helper program, module, or script to do any of the above. *
* *
* This list is not exclusive, but is meant to clarify our interpretation *
* of derived works with some common examples. Other people may interpret *
* the plain GPL differently, so we consider this a special exception to *
* the GPL that we apply to Covered Software. Works which meet any of *
* these conditions must conform to all of the terms of this license, *
* particularly including the GPL Section 3 requirements of providing *
* source code and allowing free redistribution of the work as a whole. *
* *
* As another special exception to the GPL terms, the Nmap Project grants *
* permission to link the code of this program with any version of the *
* OpenSSL library which is distributed under a license identical to that *
* listed in the included docs/licenses/OpenSSL.txt file, and distribute *
* linked combinations including the two. *
* *
* The Nmap Project has permission to redistribute Npcap, a packet *
* capturing driver and library for the Microsoft Windows platform. *
* Npcap is a separate work with it's own license rather than this Nmap *
* license. Since the Npcap license does not permit redistribution *
* without special permission, our Nmap Windows binary packages which *
* contain Npcap may not be redistributed without special permission. *
* *
* Any redistribution of Covered Software, including any derived works, *
* must obey and carry forward all of the terms of this license, including *
* obeying all GPL rules and restrictions. For example, source code of *
* the whole work must be provided and free redistribution must be *
* allowed. All GPL references to "this License", are to be treated as *
* including the terms and conditions of this license text as well. *
* *
* Because this license imposes special exceptions to the GPL, Covered *
* Work may not be combined (even as part of a larger work) with plain GPL *
* software. The terms, conditions, and exceptions of this license must *
* be included as well. This license is incompatible with some other open *
* source licenses as well. In some cases we can relicense portions of *
* Nmap or grant special permissions to use it in other open source *
* software. Please contact fyodor@nmap.org with any such requests. *
* Similarly, we don't incorporate incompatible open source software into *
* Covered Software without special permission from the copyright holders. *
* *
* If you have any questions about the licensing restrictions on using *
* Nmap in other works, we are happy to help. As mentioned above, we also *
* offer an alternative license to integrate Nmap into proprietary *
* applications and appliances. These contracts have been sold to dozens *
* of software vendors, and generally include a perpetual license as well *
* as providing support and updates. They also fund the continued *
* development of Nmap. Please email sales@nmap.com for further *
* information. *
* *
* If you have received a written license agreement or contract for *
* Covered Software stating terms other than these, you may choose to use *
* and redistribute Covered Software under those terms instead of these. *
* *
* 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 send your changes *
* to the dev@nmap.org mailing list for possible incorporation into the *
* main distribution. By sending these changes to Fyodor or one of the *
* Insecure.Org development mailing lists, or checking them into the Nmap *
* source code repository, it is understood (unless you specify *
* otherwise) that you are offering the Nmap Project the unlimited, *
* non-exclusive right to reuse, modify, and relicense the code. Nmap *
* will always be available Open Source, but this is important because *
* the inability to relicense code has caused devastating problems for *
* other Free Software projects (such as KDE and NASM). We also *
* occasionally relicense the code to third parties as discussed above. *
* If you wish to specify special license conditions of your *
* contributions, just say so when you send them. *
* *
* This program 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. See the Nmap *
* license file for more details (it's in a COPYING file included with *
* Nmap, and also available from https://svn.nmap.org/nmap/COPYING) *
* *
***************************************************************************/
/* This code was originally part of the Nping tool. */
#ifndef ICMPv4HEADER_H
#define ICMPv4HEADER_H 1
#include "ICMPHeader.h"
/* ICMP types and codes. These defines were originally taken from Slirp 1.0
* source file ip_icmp.h http://slirp.sourceforge.net/ (BSD licensed) and
* then, partially modified for Nping */
#define ICMP_ECHOREPLY 0 /* Echo reply */
#define ICMP_UNREACH 3 /* Destination unreachable: */
#define ICMP_UNREACH_NET 0 /* --> Bad network */
#define ICMP_UNREACH_HOST 1 /* --> Bad host */
#define ICMP_UNREACH_PROTOCOL 2 /* --> Bad protocol */
#define ICMP_UNREACH_PORT 3 /* --> Bad port */
#define ICMP_UNREACH_NEEDFRAG 4 /* --> DF flag caused pkt drop */
#define ICMP_UNREACH_SRCFAIL 5 /* --> Source route failed */
#define ICMP_UNREACH_NET_UNKNOWN 6 /* --> Unknown network */
#define ICMP_UNREACH_HOST_UNKNOWN 7 /* --> Unknown host */
#define ICMP_UNREACH_ISOLATED 8 /* --> Source host isolated */
#define ICMP_UNREACH_NET_PROHIB 9 /* --> Prohibited access */
#define ICMP_UNREACH_HOST_PROHIB 10 /* --> Prohibited access */
#define ICMP_UNREACH_TOSNET 11 /* --> Bad TOS for network */
#define ICMP_UNREACH_TOSHOST 12 /* --> Bad TOS for host */
#define ICMP_UNREACH_COMM_PROHIB 13 /* --> Prohibited communication */
#define ICMP_UNREACH_HOSTPRECEDENCE 14 /* --> Host precedence violation */
#define ICMP_UNREACH_PRECCUTOFF 15 /* --> Precedence cutoff */
#define ICMP_SOURCEQUENCH 4 /* Source Quench. */
#define ICMP_REDIRECT 5 /* Redirect: */
#define ICMP_REDIRECT_NET 0 /* --> For the network */
#define ICMP_REDIRECT_HOST 1 /* --> For the host */
#define ICMP_REDIRECT_TOSNET 2 /* --> For the TOS and network */
#define ICMP_REDIRECT_TOSHOST 3 /* --> For the TOS and host */
#define ICMP_ECHO 8 /* Echo request */
#define ICMP_ROUTERADVERT 9 /* Router advertisement */
#define ICMP_ROUTERADVERT_MOBILE 16 /* Used by mobile IP agents */
#define ICMP_ROUTERSOLICIT 10 /* Router solicitation */
#define ICMP_TIMXCEED 11 /* Time exceeded: */
#define ICMP_TIMXCEED_INTRANS 0 /* --> TTL==0 in transit */
#define ICMP_TIMXCEED_REASS 1 /* --> TTL==0 in reassembly */
#define ICMP_PARAMPROB 12 /* Parameter problem */
#define ICMM_PARAMPROB_POINTER 0 /* --> Pointer shows the problem */
#define ICMP_PARAMPROB_OPTABSENT 1 /* --> Option missing */
#define ICMP_PARAMPROB_BADLEN 2 /* --> Bad datagram length */
#define ICMP_TSTAMP 13 /* Timestamp request */
#define ICMP_TSTAMPREPLY 14 /* Timestamp reply */
#define ICMP_INFO 15 /* Information request */
#define ICMP_INFOREPLY 16 /* Information reply */
#define ICMP_MASK 17 /* Address mask request */
#define ICMP_MASKREPLY 18 /* Address mask reply */
#define ICMP_TRACEROUTE 30 /* Traceroute */
#define ICMP_TRACEROUTE_SUCCESS 0 /* --> Dgram sent to next router */
#define ICMP_TRACEROUTE_DROPPED 1 /* --> Dgram was dropped */
#define ICMP_DOMAINNAME 37 /* Domain name request */
#define ICMP_DOMAINNAMEREPLY 38 /* Domain name reply */
#define ICMP_SECURITYFAILURES 40 /* Security failures */
#define ICMP_STD_HEADER_LEN 8
#define ICMP_MAX_PAYLOAD_LEN 1500
#define MAX_ROUTER_ADVERT_ENTRIES (((ICMP_MAX_PAYLOAD_LEN-4)/8)-1)
class ICMPv4Header : public ICMPHeader {
private:
/**********************************************************************/
/* COMMON ICMPv4 packet HEADER */
/**********************************************************************/
/* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ Message Body +
| | */
struct nping_icmpv4_hdr {
u8 type; /* ICMP Message Type */
u8 code; /* ICMP Message Code */
u16 checksum; /* Checksum */
u8 data[ICMP_MAX_PAYLOAD_LEN];
}__attribute__((__packed__));
typedef struct nping_icmpv4_hdr nping_icmpv4_hdr_t;
/**********************************************************************/
/* ICMPv4 MESSAGE SPECIFIC HEADERS */
/**********************************************************************/
/* Destination Unreachable Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| unused |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Internet Header + 64 bits of Original Data Datagram |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_dest_unreach_msg{
u32 unused;
//u8 original_dgram[?];
}__attribute__((__packed__));
typedef struct icmp4_dest_unreach_msg icmp4_dest_unreach_msg_t;
/* Time Exceeded Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| unused |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Internet Header + 64 bits of Original Data Datagram |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_time_exceeded_msg{
u32 unused;
//u8 original_dgram[?];
}__attribute__((__packed__));
typedef struct icmp4_time_exceeded_msg icmp4_time_exceeded_msg_t;
/* Parameter Problem Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Pointer | unused |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Internet Header + 64 bits of Original Data Datagram |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_parameter_problem_msg{
u8 pointer;
u8 unused[3];
//u8 original_dgram[?];
}__attribute__((__packed__));
typedef struct icmp4_parameter_problem_msg icmp4_parameter_problem_msg_t;
/* Source Quench Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| unused |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Internet Header + 64 bits of Original Data Datagram |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_source_quench_msg{
u32 unused;
//u8 original_dgram[?];
}__attribute__((__packed__));
typedef struct icmp4_source_quench_msg icmp4_source_quench_msg_t;
/* Redirect Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Gateway Internet Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Internet Header + 64 bits of Original Data Datagram |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_redirect_msg{
struct in_addr gateway_address;
//u8 original_dgram[?];
}__attribute__((__packed__));
typedef struct icmp4_redirect_msg icmp4_redirect_msg_t;
/* Echo Request/Reply Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier | Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Data ...
+-+-+-+-+- */
struct icmp4_echo_msg{
u16 identifier;
u16 sequence;
//u8 data[?];
}__attribute__((__packed__));
typedef struct icmp4_echo_msg icmp4_echo_msg_t;
/* Timestamp Request/Reply Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier | Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Originate Timestamp |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Receive Timestamp |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Transmit Timestamp |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_timestamp_msg{
u16 identifier;
u16 sequence;
u32 originate_ts;
u32 receive_ts;
u32 transmit_ts;
}__attribute__((__packed__));
typedef struct icmp4_timestamp_msg icmp4_timestamp_msg_t;
/* Information Request/Reply Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier | Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_information_msg{
u16 identifier;
u16 sequence;
}__attribute__((__packed__));
typedef struct icmp4_information_msg icmp4_information_msg_t;
/* ICMP Router Advertisement Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num Addrs |Addr Entry Size| Lifetime |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Router Address[1] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Preference Level[1] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Router Address[2] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Preference Level[2] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| . |
| . |
| . | */
struct icmp4_router_advert_entry{
struct in_addr router_addr;
u32 preference_level;
}__attribute__((__packed__));
typedef struct icmp4_router_advert_entry icmp4_router_advert_entry_t;
struct icmp4_router_advert_msg{
u8 num_addrs;
u8 addr_entry_size;
u16 lifetime;
icmp4_router_advert_entry_t adverts[MAX_ROUTER_ADVERT_ENTRIES];
}__attribute__((__packed__));
typedef struct icmp4_router_advert_msg icmp4_router_advert_msg_t;
/* ICMP Router Solicitation Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_router_solicit_msg{
u32 reserved;
}__attribute__((__packed__));
typedef struct icmp4_router_solicit_msg icmp4_router_solicit_msg_t;
/* ICMP Security Failures Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | Pointer |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Original Internet Headers + 64 bits of Payload ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_security_failures_msg{
u16 reserved;
u16 pointer;
//u8 original_headers[?];
}__attribute__((__packed__));
typedef struct icmp4_security_failures_msg icmp4_security_failures_msg_t;
/* ICMP Address Mask Request/Reply Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier | Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Address Mask |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_address_mask_msg{
u16 identifier;
u16 sequence;
struct in_addr address_mask;
}__attribute__((__packed__));
typedef struct icmp4_address_mask_msg icmp4_address_mask_msg_t;
/* ICMP Traceroute Message
+---------------+---------------+---------------+---------------+
| Type | Code | Checksum |
+---------------+---------------+---------------+---------------+
| ID Number | unused |
+---------------+---------------+---------------+---------------+
| Outbound Hop Count | Return Hop Count |
+---------------+---------------+---------------+---------------+
| Output Link Speed |
+---------------+---------------+---------------+---------------+
| Output Link MTU |
+---------------+---------------+---------------+---------------+ */
struct icmp4_traceroute_msg{
u16 id_number;
u16 unused;
u16 outbound_hop_count;
u16 return_hop_count;
u32 output_link_speed;
u32 output_link_mtu;
}__attribute__((__packed__));
typedef struct icmp4_traceroute_msg icmp4_traceroute_msg_t;
/* ICMP Domain Name Request Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier | Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
struct icmp4_domain_name_request_msg{
u16 identifier;
u16 sequence;
}__attribute__((__packed__));
typedef struct icmp4_domain_name_request_msg icmp4_domain_name_request_msg_t;
/* ICMP Domain Name Reply Message
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identifier | Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Time-To-Live |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Names ...
+-+-+-+-+-+-+-+- */
struct icmp4_domain_name_reply_msg{
u16 identifier;
u16 sequence;
s16 ttl; /* Signed! */
u8 names[ICMP_MAX_PAYLOAD_LEN-8];
}__attribute__((__packed__));
typedef struct icmp4_domain_name_reply_msg icmp4_domain_name_reply_msg_t;
/* Main data structure */
nping_icmpv4_hdr_t h;
/* Helper pointers */
icmp4_dest_unreach_msg_t *h_du;
icmp4_time_exceeded_msg_t *h_te;
icmp4_parameter_problem_msg_t *h_pp;
icmp4_source_quench_msg_t *h_sq;
icmp4_redirect_msg_t *h_r;
icmp4_echo_msg_t *h_e;
icmp4_timestamp_msg_t *h_t;
icmp4_information_msg_t *h_i;
icmp4_router_advert_msg_t *h_ra;
icmp4_router_solicit_msg_t *h_rs;
icmp4_security_failures_msg_t *h_sf;
icmp4_address_mask_msg_t *h_am;
icmp4_traceroute_msg_t *h_trc;
icmp4_domain_name_request_msg_t *h_dn;
icmp4_domain_name_reply_msg_t *h_dnr;
/* Internal counts */
int routeradventries;
int domainnameentries;
public:
/* PacketElement:: Mandatory methods */
ICMPv4Header();
~ICMPv4Header();
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;
/* ICMP Type */
int setType(u8 val);
u8 getType() const;
bool validateType();
bool validateType(u8 val);
/* ICMP Code */
int setCode(u8 c);
u8 getCode() const;
bool validateCode();
bool validateCode(u8 type, u8 code);
/* Checksum */
int setSum();
int setSum(u16 s);
u16 getSum() const;
/* Unused and reserved fields */
int setUnused(u32 val);
u32 getUnused() const;
int setReserved( u32 val );
u32 getReserved() const;
/* Redirect */
int setGatewayAddress(struct in_addr ipaddr);
struct in_addr getGatewayAddress() const;
/* Parameter problem */
int setParameterPointer(u8 val);
u8 getParameterPointer() const;
/* Router advertisement */
int setNumAddresses(u8 val);
u8 getNumAddresses() const;
int setAddrEntrySize(u8 val);
u8 getAddrEntrySize() const;
int setLifetime(u16 val);
u16 getLifetime() const;
int addRouterAdvEntry(struct in_addr raddr, u32 pref);
u8 *getRouterAdvEntries(int *num) const;
int clearRouterAdvEntries();
/* Echo/Timestamp/Mask */
int setIdentifier(u16 val);
u16 getIdentifier() const;
int setSequence(u16 val);
u16 getSequence() const;
/* Timestamp only */
int setOriginateTimestamp(u32 t);
u32 getOriginateTimestamp() const;
int setReceiveTimestamp(u32 t);
u32 getReceiveTimestamp() const;
int setTransmitTimestamp(u32 t);
u32 getTransmitTimestamp() const;
/* Mask only */
int setAddressMask(struct in_addr mask);
struct in_addr getAddressMask() const;
/* Security Failures */
int setSecurityPointer(u16 val);
u16 getSecurityPointer() const;
/* Traceroute */
int setIDNumber(u16 val);
u16 getIDNumber() const;
int setOutboundHopCount(u16 val);
u16 getOutboundHopCount() const;
int setReturnHopCount(u16 val);
u16 getReturnHopCount() const;
int setOutputLinkSpeed(u32 val);
u32 getOutputLinkSpeed() const;
int setOutputLinkMTU(u32 val);
u32 getOutputLinkMTU() const;
/* Misc */
int getICMPHeaderLengthFromType( u8 type ) const;
const char *type2string(int type, int code) const;
bool isError() const;
}; /* End of class ICMPv4Header */
#endif
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