resolved: add daemon to manage resolv.conf

[elogind.git] / src / network / networkd-manager.c

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index d4b05bb98710e6ca06e50eabc27cdf9afadd0325..2e3b4bb885e010249ca56c582a28e6b1c5415ca5 100644 (file)
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -19,11 +19,14 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  ***/
 
-#include <resolv.h>
+#include <sys/socket.h>
 #include <linux/if.h>
+#include <libkmod.h>
 
+#include "conf-parser.h"
 #include "path-util.h"
 #include "networkd.h"
+#include "network-internal.h"
 #include "libudev-private.h"
 #include "udev-util.h"
 #include "rtnl-util.h"
@@ -91,7 +94,8 @@ int manager_new(Manager **ret) {
 
         sd_event_set_watchdog(m->event, true);
 
-        r = sd_rtnl_open(&m->rtnl, RTMGRP_LINK | RTMGRP_IPV4_IFADDR);
+        r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR,
+                         RTNLGRP_IPV6_IFADDR);
         if (r < 0)
                 return r;
 
@@ -116,6 +120,10 @@ int manager_new(Manager **ret) {
                         return -ENOMEM;
         }
 
+        m->kmod_ctx = kmod_new(NULL, NULL);
+        if (!m->kmod_ctx)
+                return -ENOMEM;
+
         m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
         if (!m->links)
                 return -ENOMEM;
@@ -142,6 +150,7 @@ void manager_free(Manager *m) {
 
         free(m->state_file);
 
+        kmod_unref(m->kmod_ctx);
         udev_monitor_unref(m->udev_monitor);
         udev_unref(m->udev);
         sd_bus_unref(m->bus);
@@ -384,6 +393,14 @@ int manager_rtnl_listen(Manager *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;
 }
 
@@ -402,102 +419,13 @@ int manager_bus_listen(Manager *m) {
         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;
-        const char *domainname = NULL;
-        int r;
-
-        assert(m);
-
-        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#\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);
-
-        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);
-                                }
-                        }
-
-                        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);
-                        }
-                }
-        }
-
-        HASHMAP_FOREACH(link, m->links, i) {
-                if (link->network && link->network->dns) {
-                        Address *address;
-                        Iterator j;
-
-                        SET_FOREACH(address, link->network->dns, j) {
-                                append_dns(f, &address->in_addr.in,
-                                           address->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;
-}
-
 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;
+        bool dormant = false, carrier = false;
         int r;
 
         assert(m);