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confd: enable IFF_MULTICAST on GRE tunnel interfaces

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Required for protocol daemons like ospfd to join multicast groups.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2025-11-07 14:46:54 +01:00
parent 777650bbca
commit a76b1adc1e
1 changed files with 6 additions and 2 deletions
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src/confd/src/infix-if-gre.c
+6 -2
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@@ -6,6 +6,7 @@
int gre_gen(struct lyd_node *dif, struct lyd_node *cif, FILE *ip)
{
const char *local, *remote, *ttl, *tos, *pmtudisc;
const char *ifname = lydx_get_cattr(cif, "name");
struct lyd_node *gre;
int ipv6;
@@ -15,8 +16,7 @@ int gre_gen(struct lyd_node *dif, struct lyd_node *cif, FILE *ip)
ipv6 = !!strstr(local, ":");
fprintf(ip, "link add name %s",
lydx_get_cattr(cif, "name"));
fprintf(ip, "link add name %s", ifname);
switch (iftype_from_iface(cif)) {
case IFT_GRE:
@@ -45,5 +45,9 @@ int gre_gen(struct lyd_node *dif, struct lyd_node *cif, FILE *ip)
fprintf(ip, " nopmtudisc");
fputc('\n', ip);
/* GRE interfaces don't have IFF_MULTICAST by default */
fprintf(ip, "link set dev %s multicast on\n", ifname);
return 0;
}