Posts tagged icmp

ICMP types

posted on 2015-03-25 06:44:31

ICMP cheatsheet

In short, the most-needed stuff:

0 Echo reply
3 Destination unreachable
4 Source quench
5 Redirect (Change a Route)
8 Echo request
11 Time exceeded for a datagram
12 Parameter Problem on a datagram
13 Timestamp request
14 Timestamp reply
15 Information request
16 Information reply
17 Address mask request
18 Address mask reply 

complete overview

This is more or less copy-paste from here.

ICMP TYPE NUMBERS

The Internet Control Message Protocol (ICMP) has many messages that
are identified by a "type" field.

Type    Name                    Reference
----    -------------------------       ---------
  0 Echo Reply               [RFC792]
  1 Unassigned                  [JBP]
  2 Unassigned                  [JBP]
  3 Destination Unreachable          [RFC792]
  4 Source Quench                [RFC792]
  5 Redirect                 [RFC792]
  6 Alternate Host Address              [JBP]
  7 Unassigned                  [JBP]
  8 Echo                     [RFC792]
  9 Router Advertisement            [RFC1256]
 10 Router Selection            [RFC1256]
 11 Time Exceeded                [RFC792]
 12 Parameter Problem            [RFC792]
 13 Timestamp                [RFC792]
 14 Timestamp Reply              [RFC792]
 15 Information Request          [RFC792]
 16 Information Reply            [RFC792]
 17 Address Mask Request                     [RFC950]
 18 Address Mask Reply           [RFC950]
 19 Reserved (for Security)            [Solo]
 20-29  Reserved (for Robustness Experiment)        [ZSu]
 30 Traceroute              [RFC1393]
 31 Datagram Conversion Error       [RFC1475]
 32     Mobile Host Redirect              [David Johnson]
 33     IPv6 Where-Are-You                 [Bill Simpson]
 34     IPv6 I-Am-Here                     [Bill Simpson]
 35     Mobile Registration Request        [Bill Simpson]
 36     Mobile Registration Reply          [Bill Simpson]
 37     Domain Name Request                     [Simpson]
 38     Domain Name Reply                       [Simpson]
 39     SKIP                                    [Markson]
 40     Photuris                                [Simpson]
 41-255 Reserved                    [JBP]

Many of these ICMP types have a "code" field.  Here we list the types
again with their assigned code fields.

Type    Name                                    Reference
----    -------------------------               ---------
  0     Echo Reply                               [RFC792]
        Codes
            0  No Code
  1     Unassigned                                  [JBP]
  2     Unassigned                                  [JBP]
  3     Destination Unreachable                  [RFC792]
    Codes
        0  Net Unreachable
        1  Host Unreachable
            2  Protocol Unreachable
            3  Port Unreachable
            4  Fragmentation Needed and Don't Fragment was Set
            5  Source Route Failed
            6  Destination Network Unknown
            7  Destination Host Unknown
            8  Source Host Isolated
            9  Communication with Destination Network is
               Administratively Prohibited
           10  Communication with Destination Host is
               Administratively Prohibited
           11  Destination Network Unreachable for Type of Service
           12  Destination Host Unreachable for Type of Service
           13  Communication Administratively Prohibited      [RFC1812]
           14  Host Precedence Violation                      [RFC1812]
           15  Precedence cutoff in effect                    [RFC1812]
  4     Source Quench                            [RFC792]
        Codes
            0  No Code
  5     Redirect                                 [RFC792]
        Codes
            0  Redirect Datagram for the Network (or subnet)
            1  Redirect Datagram for the Host
            2  Redirect Datagram for the Type of Service and Network
            3  Redirect Datagram for the Type of Service and Host
  6     Alternate Host Address                      [JBP]
        Codes
            0  Alternate Address for Host
  7     Unassigned                                  [JBP]
  8     Echo                                     [RFC792]
        Codes
            0  No Code
  9     Router Advertisement                    [RFC1256]
        Codes
            0  No Code
 10     Router Selection                        [RFC1256]
        Codes
            0  No Code
 11     Time Exceeded                            [RFC792]
        Codes
            0  Time to Live exceeded in Transit
            1  Fragment Reassembly Time Exceeded
 12     Parameter Problem                        [RFC792]
        Codes
            0  Pointer indicates the error
            1  Missing a Required Option        [RFC1108]
            2  Bad Length
 13     Timestamp                                [RFC792]
        Codes
            0  No Code
 14     Timestamp Reply                          [RFC792]
        Codes
            0  No Code
 15     Information Request                      [RFC792]
        Codes
            0  No Code
 16     Information Reply                        [RFC792]
        Codes
            0  No Code
 17     Address Mask Request                     [RFC950]
        Codes
            0  No Code
 18     Address Mask Reply                       [RFC950]
        Codes
            0  No Code
 19     Reserved (for Security)                    [Solo]
 20-29  Reserved (for Robustness Experiment)        [ZSu]
 30     Traceroute                              [RFC1393]
 31     Datagram Conversion Error               [RFC1475]
 32     Mobile Host Redirect              [David Johnson]
 33     IPv6 Where-Are-You                 [Bill Simpson]
 34     IPv6 I-Am-Here                     [Bill Simpson]
 35     Mobile Registration Request        [Bill Simpson]
 36     Mobile Registration Reply          [Bill Simpson]
 39     SKIP                                    [Markson]
 40     Photuris                                [Simpson]

Code
0   Reserved
1   unknown security parameters index
2   valid security parameters, but authentication failed
3   valid security parameters, but decryption failed

===================================================================

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