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sd-radv: add several notes about constants

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This commit is contained in:
Yu Watanabe
2021-10-27 19:03:58 +09:00
parent 03ec10fdf4
commit e786c2e50f
1 changed files with 18 additions and 2 deletions
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src/libsystemd-network/radv-internal.h
+18 -2
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@@ -12,9 +12,25 @@
#include "sparse-endian.h"
#include "time-util.h"
/* RFC 4861 section 6.2.1.
* MaxRtrAdvInterval
* The maximum time allowed between sending unsolicited multicast Router Advertisements from the
* interface, in seconds. MUST be no less than 4 seconds and no greater than 1800 seconds.
* Default: 600 seconds */
#define RADV_DEFAULT_MAX_TIMEOUT_USEC (600 * USEC_PER_SEC)
#define RADV_DEFAULT_MIN_TIMEOUT_USEC (200 * USEC_PER_SEC)
/* RFC 4861 section 6.2.1.
* MinRtrAdvInterval
* The minimum time allowed between sending unsolicited multicast Router Advertisements from the
* interface, in seconds. MUST be no less than 3 seconds and no greater than .75 * MaxRtrAdvInterval.
* Default: 0.33 * MaxRtrAdvInterval If MaxRtrAdvInterval >= 9 seconds; otherwise, the Default is
* MaxRtrAdvInterval (Note, this should be a typo. We use 0.75 * MaxRtrAdvInterval). */
#define RADV_DEFAULT_MIN_TIMEOUT_USEC (RADV_DEFAULT_MAX_TIMEOUT_USEC / 3)
/* RFC 4861 section 10.
* MAX_INITIAL_RTR_ADVERT_INTERVAL 16 seconds
* MAX_INITIAL_RTR_ADVERTISEMENTS 3 transmissions
* MAX_FINAL_RTR_ADVERTISEMENTS 3 transmissions
* MIN_DELAY_BETWEEN_RAS 3 seconds
* MAX_RA_DELAY_TIME .5 seconds */
#define RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC (16 * USEC_PER_SEC)
#define RADV_MAX_INITIAL_RTR_ADVERTISEMENTS 3
#define RADV_MAX_FINAL_RTR_ADVERTISEMENTS 3