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 "network-internal.h"
#include "libudev-private.h"
#include "udev-util.h"
#include "rtnl-util.h"
#endif
NULL};
-static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
- Manager *m = userdata;
+static int setup_default_address_pool(Manager *m) {
+ AddressPool *p;
+ int r;
assert(m);
- log_received_signal(LOG_INFO, si);
-
- sd_event_exit(m->event, 0);
- return 0;
-}
-
-static int setup_signals(Manager *m) {
- sigset_t mask;
- int r;
+ /* Add in the well-known private address ranges. */
- assert(m);
+ r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
+ if (r < 0)
+ return r;
- assert_se(sigemptyset(&mask) == 0);
- sigset_add_many(&mask, SIGINT, SIGTERM, -1);
- assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
+ r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
+ if (r < 0)
+ return r;
- r = sd_event_add_signal(m->event, &m->sigterm_event_source, SIGTERM, dispatch_sigterm, m);
+ r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
if (r < 0)
return r;
- r = sd_event_add_signal(m->event, &m->sigint_event_source, SIGINT, dispatch_sigterm, m);
+ r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
if (r < 0)
return 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(&m->rtnl, RTMGRP_LINK | RTMGRP_IPV4_IFADDR);
+ 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;
- r = setup_signals(m);
- if (r < 0)
- return r;
-
/* udev does not initialize devices inside containers,
* so we rely on them being already initialized before
* entering the container */
return -ENOMEM;
}
- m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
- if (!m->links)
- return -ENOMEM;
-
m->netdevs = hashmap_new(string_hash_func, string_compare_func);
if (!m->netdevs)
return -ENOMEM;
LIST_HEAD_INIT(m->networks);
+ r = setup_default_address_pool(m);
+ if (r < 0)
+ return r;
+
*ret = m;
m = NULL;
Network *network;
NetDev *netdev;
Link *link;
+ AddressPool *pool;
if (!m)
return;
+ free(m->state_file);
+
udev_monitor_unref(m->udev_monitor);
udev_unref(m->udev);
sd_bus_unref(m->bus);
sd_event_unref(m->event);
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);
static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
Manager *m = userdata;
Link *link = NULL;
- char *name;
+ NetDev *netdev = NULL;
+ uint16_t type;
+ const char *name;
int r, ifindex;
assert(rtnl);
assert(message);
assert(m);
+ 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;
- }
-
- link_get(m, ifindex, &link);
- if (!link) {
- /* link is new, so add it */
- r = link_add(m, message, &link);
- if (r < 0) {
- log_debug("could not add new link");
- return 0;
- }
- }
+ } else
+ link_get(m, ifindex, &link);
r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
- if (r < 0)
+ if (r < 0 || !name) {
log_warning("rtnl: received link message without valid ifname");
- else {
- NetDev *netdev;
+ 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 = netdev_get(m, name, &netdev);
- if (r >= 0) {
+ 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;
+ 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_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;
-
- 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;
+int manager_save(Manager *m) {
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_UNKNOWN;
+ const char *operstate_str;
int r;
assert(m);
+ assert(m->state_file);
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->flags & IFF_LOOPBACK)
+ continue;
+
+ if (link->operstate > operstate)
+ operstate = link->operstate;
+ }
- r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path);
+ operstate_str = link_operstate_to_string(operstate);
+ assert(operstate_str);
+
+ r = fopen_temporary(m->state_file, &f, &temp_path);
if (r < 0)
- return r;
+ goto finish;
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);
- }
- }
+ fflush(f);
- 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);
- }
- }
+ if (ferror(f) || rename(temp_path, m->state_file) < 0) {
+ r = -errno;
+ unlink(m->state_file);
+ unlink(temp_path);
}
- HASHMAP_FOREACH(link, m->links, i) {
- if (link->network && link->network->dns) {
- Address *address;
- Iterator j;
+finish:
+ if (r < 0)
+ log_error("Failed to save network state to %s: %s", m->state_file, strerror(-r));
- SET_FOREACH(address, link->network->dns, j) {
- append_dns(f, &address->in_addr.in,
- address->family, &count);
- }
- }
- }
+ return r;
+}
- fflush(f);
+int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
+ AddressPool *p;
+ int 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;
+ 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