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-rw-r--r--src/network/sd-network.c59
-rw-r--r--src/systemd/sd-network.h9
2 files changed, 68 insertions, 0 deletions
diff --git a/src/network/sd-network.c b/src/network/sd-network.c
index 492e97c73f..64e3aaae48 100644
--- a/src/network/sd-network.c
+++ b/src/network/sd-network.c
@@ -32,6 +32,7 @@
#include "strv.h"
#include "fileio.h"
#include "sd-network.h"
+#include "network-internal.h"
#include "dhcp-lease-internal.h"
static int link_get_flags(unsigned index, unsigned *flags) {
@@ -169,6 +170,64 @@ _public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
return 0;
}
+_public_ int sd_network_get_dns(unsigned index, struct in_addr **addr, size_t *addr_size) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+ assert_return(addr, -EINVAL);
+ assert_return(addr_size, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "DNS", &s, NULL);
+ if (r < 0)
+ return r;
+ else if (!s)
+ return -EIO;
+
+ return deserialize_in_addrs(addr, addr_size, s);
+}
+
+_public_ int sd_network_get_dns6(unsigned index, struct in6_addr **addr, size_t *addr_size) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+ assert_return(addr, -EINVAL);
+ assert_return(addr_size, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "DNS", &s, NULL);
+ if (r < 0)
+ return r;
+ else if (!s)
+ return -EIO;
+
+ return deserialize_in6_addrs(addr, addr_size, s);
+}
+
+_public_ int sd_network_dhcp_use_dns(unsigned index) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "DHCP_USE_DNS", &s, NULL);
+ if (r < 0)
+ return r;
+ else if (!s)
+ return -EIO;
+
+ return parse_boolean(s);
+}
+
_public_ int sd_network_get_ifindices(unsigned **indices) {
_cleanup_closedir_ DIR *d;
int r = 0;
diff --git a/src/systemd/sd-network.h b/src/systemd/sd-network.h
index d0b2ea3576..860325a6ed 100644
--- a/src/systemd/sd-network.h
+++ b/src/systemd/sd-network.h
@@ -80,6 +80,15 @@ int sd_network_link_is_loopback(unsigned index);
/* Get DHCPv4 lease from ifindex. */
int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret);
+/* Returns true if link is configured to respect DNS entries received by DHCP */
+int sd_network_dhcp_use_dns(unsigned index);
+
+/* Get IPv4 DNS entries statically configured for the link */
+int sd_network_get_dns(unsigned index, struct in_addr **addr, size_t *addr_size);
+
+/* Get IPv6 DNS entries statically configured for the link */
+int sd_network_get_dns6(unsigned index, struct in6_addr **addr, size_t *addr_size);
+
/* Get all network interfaces' indices, and store them in *indices. Returns
* the number of indices. If indices is NULL, only returns the number of indices. */
int sd_network_get_ifindices(unsigned **indices);