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-rw-r--r--conf.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/conf.c b/conf.c
index 22949fd..13cb5a1 100644
--- a/conf.c
+++ b/conf.c
@@ -350,6 +350,14 @@ static void get_dns(struct ctx *c)
if (!dns4_set &&
dns4 - &c->dns4[0] < ARRAY_SIZE(c->dns4) - 1 &&
inet_pton(AF_INET, p + 1, dns4)) {
+ /* We can only access local addresses via the gw redirect */
+ if (ntohl(*dns4) >> IN_CLASSA_NSHIFT == IN_LOOPBACKNET) {
+ if (c->no_map_gw) {
+ *dns4 = 0;
+ continue;
+ }
+ *dns4 = c->gw4;
+ }
dns4++;
*dns4 = 0;
}
@@ -357,6 +365,14 @@ static void get_dns(struct ctx *c)
if (!dns6_set &&
dns6 - &c->dns6[0] < ARRAY_SIZE(c->dns6) - 1 &&
inet_pton(AF_INET6, p + 1, dns6)) {
+ /* We can only access local addresses via the gw redirect */
+ if (IN6_IS_ADDR_LOOPBACK(dns6)) {
+ if (c->no_map_gw) {
+ memset(dns6, 0, sizeof(*dns6));
+ continue;
+ }
+ memcpy(dns6, &c->gw6, sizeof(*dns6));
+ }
dns6++;
memset(dns6, 0, sizeof(*dns6));
}