along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <resolv.h>
+
#include "path-util.h"
#include "networkd.h"
#include "libudev-private.h"
#include "udev-util.h"
+#include "mkdir.h"
+
+const char* const network_dirs[] = {
+ "/etc/systemd/network",
+ "/run/systemd/network",
+ "/usr/lib/systemd/network",
+#ifdef HAVE_SPLIT_USER
+ "/lib/systemd/network",
+#endif
+ NULL};
int manager_new(Manager **ret) {
_cleanup_manager_free_ Manager *m = NULL;
if (r < 0)
return r;
+ r = sd_bus_default_system(&m->bus);
+ if (r < 0)
+ return r;
+
m->udev = udev_new();
if (!m->udev)
return -ENOMEM;
LIST_HEAD_INIT(m->networks);
- m->network_dirs = strv_new("/etc/systemd/network/",
- "/run/systemd/network/",
- "/usr/lib/systemd/network",
-#ifdef HAVE_SPLIT_USER
- "/lib/systemd/network",
-#endif
- NULL);
- if (!m->network_dirs)
- return -ENOMEM;
-
- if (!path_strv_canonicalize_uniq(m->network_dirs))
- return -ENOMEM;
-
*ret = m;
m = NULL;
udev_monitor_unref(m->udev_monitor);
udev_unref(m->udev);
+ sd_bus_unref(m->bus);
sd_event_source_unref(m->udev_event_source);
sd_event_unref(m->event);
bridge_free(bridge);
hashmap_free(m->bridges);
- strv_free(m->network_dirs);
sd_rtnl_unref(m->rtnl);
free(m);
int r;
/* update timestamp */
- paths_check_timestamp(m->network_dirs, &m->network_dirs_ts_usec, true);
+ paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
r = bridge_load(m);
if (r < 0)
}
bool manager_should_reload(Manager *m) {
- return paths_check_timestamp(m->network_dirs, &m->network_dirs_ts_usec, false);
+ return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
}
static int manager_process_link(Manager *m, struct udev_device *device) {
if (streq_ptr(udev_device_get_action(device), "remove")) {
uint64_t ifindex;
- log_debug("Link removed: %s", udev_device_get_sysname(device));
+ log_debug("%s: link removed", udev_device_get_sysname(device));
ifindex = udev_device_get_ifindex(device);
link = hashmap_get(m->links, &ifindex);
link_free(link);
} else {
- log_debug("New link: %s", udev_device_get_sysname(device));
-
- r = link_add(m, device);
+ r = link_add(m, device, &link);
if (r < 0) {
- log_error("Could not handle link %s: %s",
- udev_device_get_sysname(device),
- strerror(-r));
- }
+ if (r == -EEXIST)
+ log_debug("%s: link already exists, ignoring",
+ link->ifname);
+ else
+ log_error("%s: could not handle link: %s",
+ udev_device_get_sysname(device),
+ strerror(-r));
+ } else
+ log_debug("%s: link (with ifindex %" PRIu64") added",
+ link->ifname, link->ifindex);
}
return 0;
}
int manager_udev_enumerate_links(Manager *m) {
+ _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
struct udev_list_entry *item = NULL, *first = NULL;
- struct udev_enumerate *e;
int r;
assert(m);
e = udev_enumerate_new(m->udev);
- if (!e) {
- r = -ENOMEM;
- goto finish;
- }
+ if (!e)
+ return -ENOMEM;
r = udev_enumerate_add_match_subsystem(e, "net");
if (r < 0)
- goto finish;
+ return r;
+
+ r = udev_enumerate_add_match_is_initialized(e);
+ if (r < 0)
+ return r;
r = udev_enumerate_scan_devices(e);
if (r < 0)
- goto finish;
+ return r;
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
- struct udev_device *d;
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
int k;
d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
- if (!d) {
- r = -ENOMEM;
- goto finish;
- }
+ if (!d)
+ return -ENOMEM;
k = manager_process_link(m, d);
- udev_device_unref(d);
-
if (k < 0)
r = k;
}
-finish:
- if (e)
- udev_enumerate_unref(e);
-
return r;
}
static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
Manager *m = userdata;
Link *link;
+ uint64_t ifindex_64;
int r, ifindex;
r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
- if (r < 0)
+ if (r < 0) {
+ log_debug("received RTM_NEWLINK message without valid ifindex");
return 0;
+ }
- link = hashmap_get(m->links, &ifindex);
- if (!link)
+ ifindex_64 = ifindex;
+ link = hashmap_get(m->links, &ifindex_64);
+ if (!link) {
+ log_debug("received RTM_NEWLINK message for untracked ifindex %d", ifindex);
return 0;
+ }
- r = link_update(link, message);
- if (r < 0)
- return 0;
+ /* only track the status of links we want to manage */
+ if (link->network) {
+ r = link_update(link, message);
+ if (r < 0)
+ return 0;
+ } else
+ log_debug("%s: received RTM_NEWLINK message for unmanaged link", link->ifname);
return 1;
}
return 0;
}
+
+int manager_bus_listen(Manager *m) {
+ int r;
+
+ r = sd_bus_attach_event(m->bus, m->event, 0);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static void append_dns(FILE *f, struct in_addr *dns, unsigned char family, unsigned *count) {
+ char buf[INET6_ADDRSTRLEN];
+ const char *address;
+
+ address = inet_ntop(family, dns, buf, INET6_ADDRSTRLEN);
+ if (!address) {
+ log_warning("Invalid DNS address. Ignoring.");
+ return;
+ }
+
+ if (*count == MAXNS)
+ fputs("# Too many DNS servers configured, the following entries "
+ "will be ignored\n", f);
+
+ fprintf(f, "nameserver %s\n", address);
+
+ (*count) ++;
+}
+
+int manager_update_resolv_conf(Manager *m) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ Link *link;
+ Iterator i;
+ unsigned count = 0;
+ int r;
+
+ assert(m);
+
+ r = mkdir_safe_label("/run/systemd/network", 0755, 0, 0);
+ if (r < 0)
+ return r;
+
+ r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path);
+ if (r < 0)
+ return r;
+
+ fchmod(fileno(f), 0644);
+
+ fputs("# This file is managed by systemd-networkd(8). Do not edit.\n", f);
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->dhcp) {
+ struct in_addr **nameservers;
+
+ r = sd_dhcp_client_get_dns(link->dhcp, &nameservers);
+ if (r >= 0) {
+ unsigned j;
+
+ for (j = 0; nameservers[j]; j++)
+ append_dns(f, nameservers[j], AF_INET, &count);
+ }
+ }
+ }
+
+ HASHMAP_FOREACH(link, m->links, i)
+ if (link->network && link->network->dns)
+ append_dns(f, &link->network->dns->in_addr.in,
+ link->network->dns->family, &count);
+
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, "/run/systemd/network/resolv.conf") < 0) {
+ r = -errno;
+ unlink("/run/systemd/network/resolv.conf");
+ unlink(temp_path);
+ return r;
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff