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sd-network: expose DNS information

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This commit is contained in:
Tom Gundersen 2014-05-18 22:05:09 +02:00
parent 7374f9d87c
commit 7dbf94a9c4
2 changed files with 68 additions and 0 deletions
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59
src/network/sd-network.c
View file

@ -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;

9
src/systemd/sd-network.h
View file

@ -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);