CVS commit: src/sys/net

Module Name:	src
Committed By:	riastradh
Date:		Wed Jun 24 15:30:45 UTC 2026

Modified Files:
	src/sys/net: if_spppsubr.c if_spppvar.h

Log Message:
ppp(4): Use 32-bit timeouts, not 64-bit timeouts.

The timeouts are checked every 15sec so there is no real need to
record starting and ending times in units of seconds with more than 5
bits of precision.  So 32-bit starting and ending times are more than
enough.  And there is surely no need for decades-long timeouts.

1. Clamp the timeouts in SPPPSETIDLETO(struct spppidletimeout) and
   SPPPSETKEEPALIVE(struct spppkeepalivesettings) to INT32_MAX/2,
   which is over 34 years worth of seconds.

   (We should never have spent any effort on time_t compat for these:
   we should have just left them at 32-bit!  Oh well.)

2. Use time_uptime32, not time_uptime, since 32-bit unsigned
   arithmetic is large enough to handle all the differences we will
   encounter when timeouts are clamped to INT32_MAX/2 without any
   risk of trouble from wraparound.

PR kern/60364: if_spppsubr.c uses nonportable 64-bit atomics


To generate a diff of this commit:
cvs rdiff -u -r1.296 -r1.297 src/sys/net/if_spppsubr.c
cvs rdiff -u -r1.52 -r1.53 src/sys/net/if_spppvar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.