return 0;
}
-static bool link_has_carrier(unsigned flags, uint8_t operstate) {
+bool link_has_carrier(unsigned flags, uint8_t operstate) {
/* see Documentation/networking/operstates.txt in the kernel sources */
if (operstate == IF_OPER_UP)
assert(link);
assert(link->state_file);
+ assert(link->manager);
+
+ r = manager_save(link->manager);
+ if (r < 0)
+ return r;
admin_state = link_state_to_string(link->state);
assert(admin_state);
finish:
if (r < 0)
- log_error("Failed to save link data %s: %s", link->state_file, strerror(-r));
+ log_error("Failed to save link data to %s: %s", link->state_file, strerror(-r));
return r;
}
***/
#include <resolv.h>
+#include <linux/if.h>
#include "path-util.h"
#include "networkd.h"
if (!m)
return -ENOMEM;
+ m->state_file = strdup("/run/systemd/network/state");
+ if (!m->state_file)
+ return -ENOMEM;
+
r = sd_event_default(&m->event);
if (r < 0)
return r;
if (!m)
return;
+ free(m->state_file);
+
udev_monitor_unref(m->udev_monitor);
udev_unref(m->udev);
sd_bus_unref(m->bus);
return 0;
}
+
+int manager_save(Manager *m) {
+ Link *link;
+ Iterator i;
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *oper_state = "unknown";
+ bool dormant, carrier;
+ int r;
+
+ assert(m);
+ assert(m->state_file);
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->flags & IFF_LOOPBACK)
+ continue;
+
+ if (link_has_carrier(link->flags, link->operstate))
+ carrier = true;
+ else if (link->operstate == IF_OPER_DORMANT)
+ dormant = true;
+ }
+
+ if (carrier)
+ oper_state = "carrier";
+ else if (dormant)
+ oper_state = "dormant";
+
+ r = fopen_temporary(m->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "OPER_STATE=%s\n", oper_state);
+
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, m->state_file) < 0) {
+ r = -errno;
+ unlink(m->state_file);
+ unlink(temp_path);
+ }
+
+finish:
+ if (r < 0)
+ log_error("Failed to save network state to %s: %s", m->state_file, strerror(-r));
+
+ return r;
+}
sd_event_source *sigterm_event_source;
sd_event_source *sigint_event_source;
+ char *state_file;
+
Hashmap *links;
Hashmap *netdevs;
LIST_HEAD(Network, networks);
int manager_bus_listen(Manager *m);
int manager_update_resolv_conf(Manager *m);
+int manager_save(Manager *m);
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
#define _cleanup_manager_free_ _cleanup_(manager_freep)
int link_save(Link *link);
+bool link_has_carrier(unsigned flags, uint8_t operstate);
+
const char* link_state_to_string(LinkState s) _const_;
LinkState link_state_from_string(const char *s) _pure_;
return 0;
}
+_public_ int sd_network_get_operational_state(char **state) {
+ _cleanup_free_ char *s = NULL;
+ int r;
+
+ assert_return(state, -EINVAL);
+
+ r = parse_env_file("/run/systemd/network/state", NEWLINE, "OPER_STATE",
+ &s, NULL);
+ if (r == -ENOENT)
+ return -ENODATA;
+ else if (r < 0)
+ return r;
+ else if (!s)
+ return -EIO;
+
+ *state = s;
+ s = NULL;
+
+ return 0;
+}
+
_public_ int sd_network_get_link_operational_state(unsigned index, char **state) {
_cleanup_free_ char *s = NULL, *p = NULL;
int r;
*/
int sd_network_get_link_operational_state(unsigned index, char **state);
+/* Get overall opeartional state
+ * Possible states: unknown, dormant, carrier
+ * Possible return codes:
+ * -ENODATA: networkd is not aware of any links
+ */
+int sd_network_get_operational_state(char **state);
+
/* Returns true if link exists and is loopback, and false otherwise */
int sd_network_link_is_loopback(unsigned index);