diff options
Diffstat (limited to 'src/resolve/resolved-link.c')
-rw-r--r-- | src/resolve/resolved-link.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/src/resolve/resolved-link.c b/src/resolve/resolved-link.c index 37dd4a6e78..7412e64622 100644 --- a/src/resolve/resolved-link.c +++ b/src/resolve/resolved-link.c @@ -515,14 +515,17 @@ int link_update_monitor(Link *l) { return 0; } -bool link_relevant(Link *l, int family, bool multicast) { +bool link_relevant(Link *l, int family, bool local_multicast) { _cleanup_free_ char *state = NULL; LinkAddress *a; assert(l); - /* A link is relevant for multicast traffic if it isn't a loopback or pointopoint device, has a link beat, can - * do multicast and has at least one relevant IP address */ + /* A link is relevant for local multicast traffic if it isn't a loopback or pointopoint device, has a link + * beat, can do multicast and has at least one link-local (or better) IP address. + * + * A link is relevant for non-multicast traffic if it isn't a loopback device, has a link beat, and has at + * least one routable address.*/ if (l->flags & (IFF_LOOPBACK|IFF_DORMANT)) return false; @@ -530,7 +533,7 @@ bool link_relevant(Link *l, int family, bool multicast) { if ((l->flags & (IFF_UP|IFF_LOWER_UP)) != (IFF_UP|IFF_LOWER_UP)) return false; - if (multicast) { + if (local_multicast) { if (l->flags & IFF_POINTOPOINT) return false; @@ -548,7 +551,7 @@ bool link_relevant(Link *l, int family, bool multicast) { return false; LIST_FOREACH(addresses, a, l->addresses) - if ((family == AF_UNSPEC || a->family == family) && link_address_relevant(a)) + if ((family == AF_UNSPEC || a->family == family) && link_address_relevant(a, local_multicast)) return true; return false; @@ -692,7 +695,7 @@ void link_address_add_rrs(LinkAddress *a, bool force_remove) { if (a->family == AF_INET) { if (!force_remove && - link_address_relevant(a) && + link_address_relevant(a, true) && a->link->llmnr_ipv4_scope && a->link->llmnr_support == RESOLVE_SUPPORT_YES && a->link->manager->llmnr_support == RESOLVE_SUPPORT_YES) { @@ -749,7 +752,7 @@ void link_address_add_rrs(LinkAddress *a, bool force_remove) { if (a->family == AF_INET6) { if (!force_remove && - link_address_relevant(a) && + link_address_relevant(a, true) && a->link->llmnr_ipv6_scope && a->link->llmnr_support == RESOLVE_SUPPORT_YES && a->link->manager->llmnr_support == RESOLVE_SUPPORT_YES) { @@ -826,13 +829,13 @@ int link_address_update_rtnl(LinkAddress *a, sd_netlink_message *m) { return 0; } -bool link_address_relevant(LinkAddress *a) { +bool link_address_relevant(LinkAddress *a, bool local_multicast) { assert(a); if (a->flags & (IFA_F_DEPRECATED|IFA_F_TENTATIVE)) return false; - if (IN_SET(a->scope, RT_SCOPE_HOST, RT_SCOPE_NOWHERE)) + if (a->scope >= (local_multicast ? RT_SCOPE_HOST : RT_SCOPE_LINK)) return false; return true; |