Ping

Sends ICMP packets for echo to network host.

Header

IP HEADER (DEFAULT 20 byte)

0        1        2        3        4        5        6        7        8
+--------+--------+--------+--------+--------+--------+--------+--------+
|  Ver   |   IHL  |  TypeOfService  |            Total Length           |
+--------+--------+--------+--------+--------+--------+--------+--------+
|           Identification          |          Fragment Offset          |
+--------+--------+--------+--------+--------+--------+--------+--------+
|       TTL       |     Protocol    |              Checksum             |
+--------+--------+--------+--------+--------+--------+--------+--------+
|                             Source Address                            |
+--------+--------+--------+--------+--------+--------+--------+--------+
|                           Destination Address                         |
+--------+--------+--------+--------+--------+--------+--------+--------+

ICMP HEADER (DEFAULT 8 byte)

0        1        2        3        4        5        6        7        8
+--------+--------+--------+--------+--------+--------+--------+--------+
|       Type      |       Code      |              Checksum             |
+--------+--------+--------+--------+--------+--------+--------+--------+
|             Identifier            |              Sequence             |
+--------+--------+--------+--------+--------+--------+--------+--------+

PAYLOAD (DEFAULT 56 byte)

0        1        2        3        4        5        6        7        8
+--------+--------+--------+--------+--------+--------+--------+--------+
|                                .......                                |
+--------+--------+--------+--------+--------+--------+--------+--------+
|                                .......                                |

...

Compilation

compile the binary

make

remove object files & clean all

make clean
make fclean

recompile all sources

make re

Usage

must be run with sudo to bind the socket