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sntp: use randomized startup delay ([0..5] seconds) by default (if LWIP_RAND is available)

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This commit is contained in:
goldsimon 2017-04-21 09:43:44 +02:00
parent 65b8316459
commit f4730e78f8
1 changed files with 5 additions and 1 deletions
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6
src/include/lwip/apps/sntp_opts.h
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@ -140,14 +140,18 @@
* Turned off by default.
*/
#if !defined SNTP_STARTUP_DELAY || defined __DOXYGEN__
#ifdef LWIP_RAND
#define SNTP_STARTUP_DELAY 1
#else
#define SNTP_STARTUP_DELAY 0
#endif
#endif
/** If you want the startup delay to be a function, define this
* to a function (including the brackets) and define SNTP_STARTUP_DELAY to 1.
*/
#if !defined SNTP_STARTUP_DELAY_FUNC || defined __DOXYGEN__
#define SNTP_STARTUP_DELAY_FUNC SNTP_STARTUP_DELAY
#define SNTP_STARTUP_DELAY_FUNC (LWIP_RAND() % 5000)
#endif
/** SNTP receive timeout - in milliseconds