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| author | Michael Marley <michael@michaelmarley.com> | 2020-07-05 06:46:27 -0400 |
|---|---|---|
| committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2020-07-07 10:49:25 +0900 |
| commit | d469cea3bde53bc39317c8b433c825bb4790cbe5 (patch) | |
| tree | a29f6c3afe4477d6aa2c5ca881b949173573debe /src/systemd/sd-radv.h | |
| parent | c82012605b3d578710996e29e8fa4ef8ff35a610 (diff) | |
| download | systemd-d469cea3bde53bc39317c8b433c825bb4790cbe5.tar.gz | |
network: Don't send RA with zero router lifetime when restarting radv
While investigating https://github.com/systemd/systemd/issues/16356, I
discovered that networkd stops the radv service before adding or updating
prefixes and then starts it again. This causes networkd to send an RA with
a router lifetime of zero, causing the routes to flap on systems receiving
the RA for a fraction of a second before radv is started again and proper
RAs are sent. That has the potential to cause issues with latency-sensitive
traffic like gaming or VoIP. This patch adds a boolean argument to the
sd_radv_stop() function to control this behavior. The zero lifetime RA is
still sent whenever radv is actually being stopped, but when it is being
restarted for a prefix update (from networkd-dhcp6.c), the final RA is no
longer sent to avoid the route flapping.
Diffstat (limited to 'src/systemd/sd-radv.h')
| -rw-r--r-- | src/systemd/sd-radv.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/systemd/sd-radv.h b/src/systemd/sd-radv.h index 011e40d8a5..763d5ddd87 100644 --- a/src/systemd/sd-radv.h +++ b/src/systemd/sd-radv.h @@ -22,6 +22,7 @@ #include <inttypes.h> #include <net/ethernet.h> #include <netinet/in.h> +#include <stdbool.h> #include <sys/types.h> #include "_sd-common.h" @@ -49,7 +50,7 @@ int sd_radv_detach_event(sd_radv *nd); sd_event *sd_radv_get_event(sd_radv *ra); int sd_radv_start(sd_radv *ra); -int sd_radv_stop(sd_radv *ra); +int sd_radv_stop(sd_radv *ra, bool zero_router_lifetime); int sd_radv_set_ifindex(sd_radv *ra, int interface_index); int sd_radv_set_mac(sd_radv *ra, const struct ether_addr *mac_addr); |