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authorTom Gundersen <teg@jklm.no>2015-10-20 14:59:27 +0200
committerTom Gundersen <teg@jklm.no>2015-10-20 14:59:27 +0200
commit14a081a0ff1db125ade7aea3540e5544fd3e57a9 (patch)
tree62786b58f26036a946779840bcd0fce39a3145eb /src/network/networkd-link.c
parentc91960c5a04a3515c43f50a358588f056b8575a6 (diff)
parent44de7fb14f0fb5b8fe0f829f128c2c3e64114c0c (diff)
Merge pull request #1538 from ssahani/ipv62
networkd: add support to configure IPv6 DAD
Diffstat (limited to 'src/network/networkd-link.c')
-rw-r--r--src/network/networkd-link.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index f6cc1f8ee2..9d97089576 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1850,6 +1850,37 @@ static int link_set_ipv6_accept_ra(Link *link) {
return 0;
}
+static int link_set_ipv6_dad_transmits(Link *link) {
+ char buf[DECIMAL_STR_MAX(unsigned) + 1];
+ const char *p = NULL;
+ int r;
+
+ /* Make this a NOP if IPv6 is not available */
+ if (!socket_ipv6_is_supported())
+ return 0;
+
+ if (link->flags & IFF_LOOPBACK)
+ return 0;
+
+ if (link->network->ipv6_dad_transmits < 0)
+ return 0;
+
+ p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/dad_transmits");
+
+ xsprintf(buf, "%u", link->network->ipv6_dad_transmits);
+
+ r = write_string_file(p, buf, 0);
+ if (r < 0) {
+ /* If the right value is set anyway, don't complain */
+ if (verify_one_line_file(p, buf) > 0)
+ return 0;
+
+ log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
+ }
+
+ return 0;
+}
+
static int link_configure(Link *link) {
int r;
@@ -1877,6 +1908,10 @@ static int link_configure(Link *link) {
if (r < 0)
return r;
+ r = link_set_ipv6_dad_transmits(link);
+ if (r < 0)
+ return r;
+
if (link_ipv4ll_enabled(link)) {
r = ipv4ll_configure(link);
if (r < 0)