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network: do not touch kernel-created multicast route 

Fixes #6088.
This commit is contained in:
Yu Watanabe 2019-07-10 00:30:27 +09:00
parent ad3f86e6a4
commit bd7d6cec33
1 changed files with 9 additions and 0 deletions
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9
src/network/networkd-link.c
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@ -2416,6 +2416,15 @@ static int link_drop_foreign_config(Link *link) {
if (route->protocol == RTPROT_KERNEL)
continue;
/* do not touch multicast route added by kernel */
/* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
* https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
if (route->protocol == RTPROT_BOOT &&
route->family == AF_INET6 &&
route->dst_prefixlen == 8 &&
in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
continue;
if (route->protocol == RTPROT_STATIC &&
FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
continue;