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Make getnameinfo(3) salen requirement less strict and

Description

Make getnameinfo(3) salen requirement less strict and
document details of salen in getnameinfo(3) manual page.

getnameinfo(3) returned EAI_FAIL when salen was not equal to
the length corresponding to the value specified by sa->sa_family.
However, POSIX or RFC 3493 does not require it and RFC 4038
Sec.6.2.3 shows an example passing sizeof(struct sockaddr_storage)
to salen.

This change makes the requirement less strict by accepting
salen up to sizeof(struct sockaddr_storage). It also includes
two more changes: one is to fix return values because both SUSv4
and RFC 3493 require EAI_FAMILY when the address length is invalid,
another is to fix sa_len dependency in PF_LOCAL.

Pointed out by: Christophe Beauval
Reviewed by: ae
Differential Revision: https://reviews.freebsd.org/D14585

Details

Committed
hrsMar 15 2018, 1:46 PM
Reviewer
ae
Differential Revision
D14585: Make getnameinfo(3) salen requirement less strict
Parents
rS330999: White space fixes.
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