Mark Johnston 78e1f68ee1 ping(8): Improve parameter validation
- Use strtonum(3) to simplify bounds checking of numeric parameters.
- Fix bounds checking when filling out packet data in "sweep" mode.

PR:		239974, 239977, 239978
Reported by:	Neeraj <neerajpal09@gmail.com>
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D25622
2020-11-24 17:12:40 +00:00
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