ICMP

ICMP Type	Description
0	Echo Reply
1	Unassigned
2	Unassigned
3	Destination Unreachable
4	Source Quench (Deprecated)
5	Redirect
6	Alternate Host Address (Deprecated)
7	Unassigned
8	Echo
9	Router Advertisement
10	Router Selection
11	Time Exceeded
12	Parameter Problem
13	Timestamp
14	Timestamp Reply
15	Information Request (Deprecated)
16	Information Reply (Deprecated)
17	Address Mask Request (Deprecated)
18	Address Mask Reply (Deprecated)
19	Reserved (for Security)
20-29	Unassigned
30	Traceroute
31-39	Unassigned
40	Photuris (obsolete)
41-49	Unassigned
50	Mobile Host Redirect (obsolete)
51-59	Unassigned
60	Inverse Address Lookup (obsolete)
61-69	Unassigned
70	Photuris (obsolete)
71-79	Unassigned
80	IPv6 Where-Are-You
81	IPv6 I-Am-Here
82	Mobile Node Redirect
83-99	Unassigned
100	Traceroute (IPv6)
101-119	Unassigned
120	IPv6 Router Advertisement
121	IPv6 Router Solicitation
122	Neighbor Solicitation
123	Neighbor Advertisement
124	Redirect (IPv6)
125-254	Unassigned
255	Reserved