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Nest: Do not hard-reset interface when preferred address is changed

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Modify protocols to use preferred address change notification instead on
depending on hard-reset of interfaces in that case, and remove hard-reset
in that case. This avoids issue when e.g. IPv6 protocol restarts
interface when IPv4 preferred address changed (as hard-reset is
unavoidable and common for whole iface).

The patch also fixes a bug when removing last address does not send
preferred address change notification.
This commit is contained in:
Ondrej Zajicek (work)
2018-11-28 16:43:17 +01:00
parent 66934aceff
commit e2ae08694e
5 changed files with 65 additions and 50 deletions
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12
nest/iface.h
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@@ -73,12 +73,15 @@ struct iface {
*/
#define IF_JUST_CREATED 0x10000000 /* Send creation event as soon as possible */
#define IF_TMP_DOWN 0x20000000 /* Temporary shutdown due to interface reconfiguration */
#define IF_UPDATED 0x40000000 /* Iface touched in last scan */
#define IF_JUST_CREATED 0x10000000 /* Send creation event as soon as possible */
#define IF_TMP_DOWN 0x20000000 /* Temporary shutdown due to interface reconfiguration */
#define IF_UPDATED 0x40000000 /* Iface touched in last scan */
#define IF_NEEDS_RECALC 0x80000000 /* Preferred address recalculation is needed */
#define IF_LOST_ADDR4 0x01000000 /* Preferred address was deleted, notification needed */
#define IF_LOST_ADDR6 0x02000000
#define IF_LOST_LLV6 0x04000000
#define IA_UPDATED IF_UPDATED /* Address touched in last scan */
#define IA_UPDATED IF_UPDATED /* Address touched in last scan */
/* Interface change events */
@@ -93,6 +96,7 @@ struct iface {
#define IF_CHANGE_SYSDEP 0x800
#define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
#define IF_CHANGE_UPDOWN (IF_CHANGE_UP | IF_CHANGE_DOWN)
#define IF_CHANGE_PREFERRED (IF_CHANGE_ADDR4 | IF_CHANGE_ADDR6 | IF_CHANGE_LLV6)
void if_init(void);