Jonathan,
thanks for mcast support in ccsd.
However, it seems that you have forgoten to set mcast_ttl for a socket,
so mcast wouldn't have any sence, since mcast with ttl == 1 is same as
broadcast for many networks.
All you have to do is just add something like:
---8<---
char ttl = 10;
if (setsockopt(sfd, IPPROTO_IP, IP_MULTICAST_TTL,
&ttl, sizeof (ttl) < 0 )) {
log_err("Unable to set mcast ttl.\n");
error = -errno;
goto fail;
}
--->8---
ttl could be defined somewhere outside join_group(), or ever fetched
from argv, which also goes for cman_tool.
Also, try not to use 224.0.0.0/23, as it is reserved, so we might get
into trouble with default values. 224.0.0.1 is reserved for all mcast
capable hosts, so even non-cluster members (potential or not) would get
ccsd announcements.
We might even request one mcast address to be assigned for linux-cluster
project, so we can officialy use it.
btw, to all developers: it was so uncool to remove 2.6.7 kernel patch :(
2.6.8.1 has a problem with tg3 driver (some autonegotiation issues), so
it's completly unusable.
--
Lazar Obradovic, System Engineer
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