along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <resolv.h>
+#include <sys/socket.h>
+#include <linux/if.h>
+#include "conf-parser.h"
#include "path-util.h"
#include "networkd.h"
+#include "networkd-netdev.h"
+#include "networkd-link.h"
+#include "network-internal.h"
#include "libudev-private.h"
#include "udev-util.h"
#include "rtnl-util.h"
#include "mkdir.h"
+#include "virt.h"
+
+#include "sd-rtnl.h"
const char* const network_dirs[] = {
"/etc/systemd/network",
"/run/systemd/network",
"/usr/lib/systemd/network",
-#ifdef HAVE_SPLIT_USER
+#ifdef HAVE_SPLIT_USR
"/lib/systemd/network",
#endif
NULL};
+static int setup_default_address_pool(Manager *m) {
+ AddressPool *p;
+ int r;
+
+ assert(m);
+
+ /* Add in the well-known private address ranges. */
+
+ r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
int manager_new(Manager **ret) {
_cleanup_manager_free_ Manager *m = NULL;
int r;
if (!m)
return -ENOMEM;
+ m->state_file = strdup("/run/systemd/netif/state");
+ if (!m->state_file)
+ return -ENOMEM;
+
r = sd_event_default(&m->event);
if (r < 0)
return r;
sd_event_set_watchdog(m->event, true);
- r = sd_rtnl_open(RTMGRP_LINK | RTMGRP_IPV4_IFADDR, &m->rtnl);
+ sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
+ sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+
+ r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR,
+ RTNLGRP_IPV6_IFADDR);
if (r < 0)
return r;
if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
return r;
- m->udev = udev_new();
- if (!m->udev)
- return -ENOMEM;
-
- m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
- if (!m->udev_monitor)
- return -ENOMEM;
+ /* udev does not initialize devices inside containers,
+ * so we rely on them being already initialized before
+ * entering the container */
+ if (detect_container(NULL) <= 0) {
+ m->udev = udev_new();
+ if (!m->udev)
+ return -ENOMEM;
- m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
- if (!m->links)
- return -ENOMEM;
+ m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+ if (!m->udev_monitor)
+ return -ENOMEM;
+ }
m->netdevs = hashmap_new(string_hash_func, string_compare_func);
if (!m->netdevs)
LIST_HEAD_INIT(m->networks);
+ r = setup_default_address_pool(m);
+ if (r < 0)
+ return r;
+
*ret = m;
m = NULL;
void manager_free(Manager *m) {
Network *network;
- Netdev *netdev;
+ NetDev *netdev;
Link *link;
+ AddressPool *pool;
+
+ if (!m)
+ return;
+
+ free(m->state_file);
udev_monitor_unref(m->udev_monitor);
udev_unref(m->udev);
sd_event_source_unref(m->udev_event_source);
sd_event_unref(m->event);
- while ((network = m->networks))
- network_free(network);
-
while ((link = hashmap_first(m->links)))
- link_free(link);
+ link_unref(link);
hashmap_free(m->links);
+ while ((network = m->networks))
+ network_free(network);
+
while ((netdev = hashmap_first(m->netdevs)))
- netdev_free(netdev);
+ netdev_unref(netdev);
hashmap_free(m->netdevs);
+ while ((pool = m->address_pools))
+ address_pool_free(pool);
+
sd_rtnl_unref(m->rtnl);
free(m);
return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
}
-static int manager_process_link(Manager *m, struct udev_device *device) {
- Link *link;
- int r;
-
- if (streq_ptr(udev_device_get_action(device), "remove")) {
- uint64_t ifindex;
+static int manager_udev_process_link(Manager *m, struct udev_device *device) {
+ Link *link = NULL;
+ int r, ifindex;
- log_debug("%s: link removed", udev_device_get_sysname(device));
+ assert(m);
+ assert(device);
- ifindex = udev_device_get_ifindex(device);
- link = hashmap_get(m->links, &ifindex);
- if (!link)
- return 0;
+ if (!streq_ptr(udev_device_get_action(device), "add"))
+ return 0;
- link_free(link);
- } else {
- r = link_add(m, device, &link);
- if (r < 0) {
- 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);
+ ifindex = udev_device_get_ifindex(device);
+ if (ifindex <= 0) {
+ log_debug("ignoring udev ADD event for device with invalid ifindex");
+ return 0;
}
+ r = link_get(m, ifindex, &link);
+ if (r == -ENODEV)
+ return 0;
+ else if (r < 0)
+ return r;
+
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
+
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;
- int r;
+static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
+ Manager *m = userdata;
+ Link *link = NULL;
+ NetDev *netdev = NULL;
+ uint16_t type;
+ const char *name;
+ int r, ifindex;
+ assert(rtnl);
+ assert(message);
assert(m);
- e = udev_enumerate_new(m->udev);
- if (!e)
- return -ENOMEM;
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning("rtnl: could not get message type");
+ return 0;
+ }
+
+ r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+ if (r < 0 || ifindex <= 0) {
+ log_warning("rtnl: received link message without valid ifindex");
+ return 0;
+ } else
+ link_get(m, ifindex, &link);
+
+ r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
+ if (r < 0 || !name) {
+ log_warning("rtnl: received link message without valid ifname");
+ return 0;
+ } else
+ netdev_get(m, name, &netdev);
+
+ switch (type) {
+ case RTM_NEWLINK:
+ if (!link) {
+ /* link is new, so add it */
+ r = link_add(m, message, &link);
+ if (r < 0) {
+ log_debug("could not add new link: %s",
+ strerror(-r));
+ return 0;
+ }
+ }
- r = udev_enumerate_add_match_subsystem(e, "net");
+ if (netdev) {
+ /* netdev exists, so make sure the ifindex matches */
+ r = netdev_set_ifindex(netdev, message);
+ if (r < 0) {
+ log_debug("could not set ifindex on netdev");
+ return 0;
+ }
+ }
+
+ r = link_update(link, message);
+ if (r < 0)
+ return 0;
+
+ break;
+
+ case RTM_DELLINK:
+ link_drop(link);
+ netdev_drop(netdev);
+
+ break;
+
+ default:
+ assert_not_reached("Received invalid RTNL message type.");
+ }
+
+ return 1;
+}
+
+int manager_rtnl_enumerate_links(Manager *m) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
+ sd_rtnl_message *link;
+ int r, k;
+
+ assert(m);
+ assert(m->rtnl);
+
+ r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
if (r < 0)
return r;
- r = udev_enumerate_add_match_is_initialized(e);
+ r = sd_rtnl_message_request_dump(req, true);
if (r < 0)
return r;
- r = udev_enumerate_scan_devices(e);
+ r = sd_rtnl_call(m->rtnl, req, 0, &reply);
if (r < 0)
return r;
- first = udev_enumerate_get_list_entry(e);
- udev_list_entry_foreach(item, first) {
- _cleanup_udev_device_unref_ struct udev_device *d = NULL;
- int k;
+ for (link = reply; link; link = sd_rtnl_message_next(link)) {
+ uint16_t type;
- d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
- if (!d)
- return -ENOMEM;
+ k = sd_rtnl_message_get_type(link, &type);
+ if (k < 0)
+ return k;
- k = manager_process_link(m, d);
+ if (type != RTM_NEWLINK)
+ continue;
+
+ k = manager_rtnl_process_link(m->rtnl, link, m);
if (k < 0)
r = k;
}
if (!device)
return -ENOMEM;
- manager_process_link(m, device);
+ manager_udev_process_link(m, device);
return 0;
}
int manager_udev_listen(Manager *m) {
int r;
+ if (detect_container(NULL) > 0)
+ return 0;
+
+ assert(m->udev_monitor);
+
r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
if (r < 0) {
log_error("Could not add udev monitor filter: %s", strerror(-r));
}
r = sd_event_add_io(m->event,
+ &m->udev_event_source,
udev_monitor_get_fd(m->udev_monitor),
EPOLLIN, manager_dispatch_link_udev,
- m, &m->udev_event_source);
+ m);
if (r < 0)
return r;
- return 0;
-}
-
-static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
- Manager *m = userdata;
- Link *link;
- const char *name;
- uint64_t ifindex_64;
- int r, ifindex;
-
- r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
- if (r < 0 || ifindex <= 0) {
- log_debug("received RTM_NEWLINK message without valid ifindex");
- return 0;
- }
-
- r = rtnl_message_link_get_ifname(message, &name);
+ r = sd_event_source_set_name(m->udev_event_source, "networkd-udev");
if (r < 0)
- log_debug("received RTM_NEWLINK message without valid IFLA_IFNAME");
- else {
- Netdev *netdev;
-
- r = netdev_get(m, name, &netdev);
- if (r >= 0) {
- r = netdev_set_ifindex(netdev, ifindex);
- if (r < 0)
- log_debug("could not set ifindex of netdev '%s' to %d: %s",
- name, ifindex, strerror(-r));
- }
- }
-
- 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;
- }
-
- /* 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 r;
- return 1;
+ return 0;
}
int manager_rtnl_listen(Manager *m) {
int r;
+ assert(m);
+
r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
if (r < 0)
return r;
if (r < 0)
return r;
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, &link_rtnl_process_address, m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, &link_rtnl_process_address, m);
+ if (r < 0)
+ return r;
+
return 0;
}
return 0;
}
-static void append_dns(FILE *f, struct in_addr *dns, unsigned char family, unsigned *count) {
- char buf[INET6_ADDRSTRLEN];
- const char *address;
+static int set_put_in_addr(Set *s, const struct in_addr *address) {
+ char *p;
+ int r;
- address = inet_ntop(family, dns, buf, INET6_ADDRSTRLEN);
- if (!address) {
- log_warning("Invalid DNS address. Ignoring.");
- return;
+ assert(s);
+
+ r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
+ if (r < 0)
+ return r;
+
+ r = set_consume(s, p);
+ if (r == -EEXIST)
+ return 0;
+
+ return r;
+}
+
+static int set_put_in_addrv(Set *s, const struct in_addr *addresses, int n) {
+ int r, i, c = 0;
+
+ assert(s);
+ assert(n <= 0 || addresses);
+
+ for (i = 0; i < n; i++) {
+ r = set_put_in_addr(s, addresses+i);
+ if (r < 0)
+ return r;
+
+ c += r;
}
- if (*count == MAXNS)
- fputs("# Too many DNS servers configured, the following entries "
- "will be ignored\n", f);
+ return c;
+}
+
+static void print_string_set(FILE *f, const char *field, Set *s) {
+ bool space = false;
+ Iterator i;
+ char *p;
+
+ if (set_isempty(s))
+ return;
- fprintf(f, "nameserver %s\n", address);
+ fputs(field, f);
- (*count) ++;
+ SET_FOREACH(p, s, i) {
+ if (space)
+ fputc(' ', f);
+ fputs(p, f);
+ space = true;
+ }
+ fputc('\n', f);
}
-int manager_update_resolv_conf(Manager *m) {
- _cleanup_free_ char *temp_path = NULL;
- _cleanup_fclose_ FILE *f = NULL;
+int manager_save(Manager *m) {
+ _cleanup_set_free_free_ Set *dns = NULL, *ntp = NULL, *domains = NULL;
Link *link;
Iterator i;
- unsigned count = 0;
- const char *domainname = NULL;
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ LinkOperationalState operstate = LINK_OPERSTATE_OFF;
+ const char *operstate_str;
int r;
assert(m);
+ assert(m->state_file);
- r = mkdir_safe_label("/run/systemd/network", 0755, 0, 0);
- if (r < 0)
- return r;
+ /* We add all NTP and DNS server to a set, to filter out duplicates */
+ dns = set_new(string_hash_func, string_compare_func);
+ if (!dns)
+ return -ENOMEM;
+
+ ntp = set_new(string_hash_func, string_compare_func);
+ if (!ntp)
+ return -ENOMEM;
+
+ domains = set_new(string_hash_func, string_compare_func);
+ if (!domains)
+ return -ENOMEM;
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->flags & IFF_LOOPBACK)
+ continue;
+
+ if (link->operstate > operstate)
+ operstate = link->operstate;
+
+ if (!link->network)
+ continue;
+
+ /* First add the static configured entries */
+ r = set_put_strdupv(dns, link->network->dns);
+ if (r < 0)
+ return r;
+
+ r = set_put_strdupv(ntp, link->network->ntp);
+ if (r < 0)
+ return r;
+
+ r = set_put_strdupv(domains, link->network->domains);
+ if (r < 0)
+ return r;
+
+ if (!link->dhcp_lease)
+ continue;
+
+ /* Secondly, add the entries acquired via DHCP */
+ if (link->network->dhcp_dns) {
+ const struct in_addr *addresses;
+
+ r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+ if (r > 0) {
+ r = set_put_in_addrv(dns, addresses, r);
+ if (r < 0)
+ return r;
+ } else if (r < 0 && r != -ENOENT)
+ return r;
+ }
+
+ if (link->network->dhcp_ntp) {
+ const struct in_addr *addresses;
+
+ r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+ if (r > 0) {
+ r = set_put_in_addrv(ntp, addresses, r);
+ if (r < 0)
+ return r;
+ } else if (r < 0 && r != -ENOENT)
+ return r;
+ }
- r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path);
+ if (link->network->dhcp_domains) {
+ const char *domainname;
+
+ r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
+ if (r >= 0) {
+ r = set_put_strdup(domains, domainname);
+ if (r < 0)
+ return r;
+ } else if (r != -ENOENT)
+ return r;
+ }
+ }
+
+ operstate_str = link_operstate_to_string(operstate);
+ assert(operstate_str);
+
+ r = fopen_temporary(m->state_file, &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#\n"
- "# Third party programs must not access this file directly, but\n"
- "# only through the symlink at /etc/resolv.conf. To manage\n"
- "# resolv.conf(5) in a different way, replace the symlink by a\n"
- "# static file or a different symlink.\n\n", f);
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "OPER_STATE=%s\n", operstate_str);
- HASHMAP_FOREACH(link, m->links, i) {
- if (link->dhcp_lease) {
- struct in_addr *nameservers;
- size_t nameservers_size;
-
- if (link->network->dhcp_dns) {
- r = sd_dhcp_lease_get_dns(link->dhcp_lease, &nameservers, &nameservers_size);
- if (r >= 0) {
- unsigned j;
-
- for (j = 0; j < nameservers_size; j++)
- append_dns(f, &nameservers[j], AF_INET, &count);
- }
- }
+ print_string_set(f, "DNS=", dns);
+ print_string_set(f, "NTP=", ntp);
+ print_string_set(f, "DOMAINS=", domains);
- if (link->network->dhcp_domainname && !domainname) {
- r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
- if (r >= 0)
- fprintf(f, "domain %s\n", domainname);
- }
- }
+ r = fflush_and_check(f);
+ if (r < 0)
+ goto fail;
+
+ if (rename(temp_path, m->state_file) < 0) {
+ r = -errno;
+ goto fail;
}
- 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);
+ return 0;
- fflush(f);
+fail:
+ log_error("Failed to save network state to %s: %s", m->state_file, strerror(-r));
+ unlink(m->state_file);
+ unlink(temp_path);
+ return r;
+}
- 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;
+int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
+ AddressPool *p;
+ int r;
+
+ assert(m);
+ assert(prefixlen > 0);
+ assert(found);
+
+ LIST_FOREACH(address_pools, p, m->address_pools) {
+ if (p->family != family)
+ continue;
+
+ r = address_pool_acquire(p, prefixlen, found);
+ if (r != 0)
+ return r;
}
return 0;
~ianmdlvl / elogind.git / blobdiff