resolved: don't read DHCP leases

networkd will expose both statically configured DNS servers and servers
receieved over DHCP in sd_network_get_dns(), so no need to keep
the distinction in resolved.

5 files changed, 30 insertions, 71 deletions

diff --git a/src/resolve/resolved-dns-server.c b/src/resolve/resolved-dns-server.c
index 734441bcc..f33cf5d96 100644
--- a/src/resolve/resolved-dns-server.c
+++ b/src/resolve/resolved-dns-server.c
@@ -24,7 +24,6 @@
 int dns_server_new(
                 Manager *m,
                 DnsServer **ret,
-                DnsServerSource source,
                 Link *l,
                 int family,
                 const union in_addr_union *in_addr) {
@@ -33,30 +32,23 @@ int dns_server_new(
 
         assert(m);
         assert(in_addr);
-        assert(source < _DNS_SERVER_SOURCE_MAX);
 
         s = new0(DnsServer, 1);
         if (!s)
                 return -ENOMEM;
 
-        s->source = source;
         s->family = family;
         s->address = *in_addr;
 
-        if (source == DNS_SERVER_LINK) {
-                assert(l);
-                LIST_FIND_TAIL(servers, l->link_dns_servers, tail);
-                LIST_INSERT_AFTER(servers, l->link_dns_servers, tail, s);
-                s->link = l;
-        } else if (source == DNS_SERVER_DHCP) {
-                assert(l);
-                LIST_FIND_TAIL(servers, l->dhcp_dns_servers, tail);
-                LIST_INSERT_AFTER(servers, l->dhcp_dns_servers, tail, s);
+        if (l) {
+                LIST_FIND_TAIL(servers, l->dns_servers, tail);
+                LIST_INSERT_AFTER(servers, l->dns_servers, tail, s);
                 s->link = l;
+                s->source = DNS_SERVER_LINK;
         } else {
-                assert(!l);
                 LIST_FIND_TAIL(servers, m->dns_servers, tail);
                 LIST_INSERT_AFTER(servers, m->dns_servers, tail, s);
+                s->source = DNS_SERVER_SYSTEM;
         }
 
         s->manager = m;
@@ -74,12 +66,7 @@ DnsServer* dns_server_free(DnsServer *s)  {
         if (s->source == DNS_SERVER_LINK) {
 
                 if (s->link)
-                        LIST_REMOVE(servers, s->link->link_dns_servers, s);
-        } else if (s->source == DNS_SERVER_DHCP) {
-
-                if (s->link)
-                        LIST_REMOVE(servers, s->link->dhcp_dns_servers, s);
-
+                        LIST_REMOVE(servers, s->link->dns_servers, s);
         } else if (s->source == DNS_SERVER_SYSTEM) {
 
                 if (s->manager)
diff --git a/src/resolve/resolved-dns-server.h b/src/resolve/resolved-dns-server.h
index 2b0b99649..45a7c4ff3 100644
--- a/src/resolve/resolved-dns-server.h
+++ b/src/resolve/resolved-dns-server.h
@@ -33,7 +33,6 @@ typedef enum DnsServerSource DnsServerSource;
 enum DnsServerSource {
         DNS_SERVER_SYSTEM,
         DNS_SERVER_LINK,
-        DNS_SERVER_DHCP,
         _DNS_SERVER_SOURCE_MAX
 };
 
@@ -54,7 +53,6 @@ struct DnsServer {
 int dns_server_new(
                 Manager *m,
                 DnsServer **s,
-                DnsServerSource source,
                 Link *l,
                 int family,
                 const union in_addr_union *address);
diff --git a/src/resolve/resolved-link.c b/src/resolve/resolved-link.c
index 43f60d8bb..16f41a260 100644
--- a/src/resolve/resolved-link.c
+++ b/src/resolve/resolved-link.c
@@ -22,7 +22,6 @@
 #include <net/if.h>
 
 #include "sd-network.h"
-#include "dhcp-lease-internal.h"
 #include "strv.h"
 #include "resolved-link.h"
 
@@ -71,11 +70,8 @@ Link *link_free(Link *l) {
         dns_scope_free(l->llmnr_ipv4_scope);
         dns_scope_free(l->llmnr_ipv6_scope);
 
-        while (l->dhcp_dns_servers)
-                dns_server_free(l->dhcp_dns_servers);
-
-        while (l->link_dns_servers)
-                dns_server_free(l->link_dns_servers);
+        while (l->dns_servers)
+                dns_server_free(l->dns_servers);
 
         free(l);
         return NULL;
@@ -86,7 +82,7 @@ static void link_allocate_scopes(Link *l) {
 
         assert(l);
 
-        if (l->link_dns_servers || l->dhcp_dns_servers) {
+        if (l->dns_servers) {
                 if (!l->unicast_scope) {
                         r = dns_scope_new(l->manager, &l->unicast_scope, l, DNS_PROTOCOL_DNS, AF_UNSPEC);
                         if (r < 0)
@@ -136,7 +132,7 @@ int link_update_rtnl(Link *l, sd_rtnl_message *m) {
         return 0;
 }
 
-static int link_update_link_dns_servers(Link *l) {
+static int link_update_dns_servers(Link *l) {
         _cleanup_free_ struct in_addr *nameservers = NULL;
         _cleanup_free_ struct in6_addr *nameservers6 = NULL;
         DnsServer *s, *nx;
@@ -144,7 +140,7 @@ static int link_update_link_dns_servers(Link *l) {
 
         assert(l);
 
-        LIST_FOREACH(servers, s, l->link_dns_servers)
+        LIST_FOREACH(servers, s, l->dns_servers)
                 s->marked = true;
 
         n = sd_network_get_dns(l->ifindex, &nameservers);
@@ -156,11 +152,11 @@ static int link_update_link_dns_servers(Link *l) {
         for (i = 0; i < n; i++) {
                 union in_addr_union a = { .in = nameservers[i] };
 
-                s = link_find_dns_server(l, DNS_SERVER_LINK, AF_INET, &a);
+                s = link_find_dns_server(l, AF_INET, &a);
                 if (s)
                         s->marked = false;
                 else {
-                        r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, AF_INET, &a);
+                        r = dns_server_new(l->manager, NULL, l, AF_INET, &a);
                         if (r < 0)
                                 goto clear;
                 }
@@ -175,25 +171,25 @@ static int link_update_link_dns_servers(Link *l) {
         for (i = 0; i < n; i++) {
                 union in_addr_union a = { .in6 = nameservers6[i] };
 
-                s = link_find_dns_server(l, DNS_SERVER_LINK, AF_INET6, &a);
+                s = link_find_dns_server(l, AF_INET6, &a);
                 if (s)
                         s->marked = false;
                 else {
-                        r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, AF_INET6, &a);
+                        r = dns_server_new(l->manager, NULL, l, AF_INET6, &a);
                         if (r < 0)
                                 goto clear;
                 }
         }
 
-        LIST_FOREACH_SAFE(servers, s, nx, l->link_dns_servers)
+        LIST_FOREACH_SAFE(servers, s, nx, l->dns_servers)
                 if (s->marked)
                         dns_server_free(s);
 
         return 0;
 
 clear:
-        while (l->link_dns_servers)
-                dns_server_free(l->link_dns_servers);
+        while (l->dns_servers)
+                dns_server_free(l->dns_servers);
 
         return r;
 }
@@ -201,7 +197,7 @@ clear:
 int link_update_monitor(Link *l) {
         assert(l);
 
-        link_update_link_dns_servers(l);
+        link_update_dns_servers(l);
         link_allocate_scopes(l);
 
         return 0;
@@ -242,14 +238,12 @@ LinkAddress *link_find_address(Link *l, int family, union in_addr_union *in_addr
         return NULL;
 }
 
-DnsServer* link_find_dns_server(Link *l, DnsServerSource source, int family, union in_addr_union *in_addr) {
-        DnsServer *first, *s;
+DnsServer* link_find_dns_server(Link *l, int family, union in_addr_union *in_addr) {
+        DnsServer *s;
 
         assert(l);
 
-        first = source == DNS_SERVER_DHCP ? l->dhcp_dns_servers : l->link_dns_servers;
-
-        LIST_FOREACH(servers, s, first)
+        LIST_FOREACH(servers, s, l->dns_servers)
                 if (s->family == family && in_addr_equal(family, &s->address, in_addr))
                         return s;
 
@@ -260,9 +254,7 @@ DnsServer *link_get_dns_server(Link *l) {
         assert(l);
 
         if (!l->current_dns_server)
-                l->current_dns_server = l->link_dns_servers;
-        if (!l->current_dns_server)
-                l->current_dns_server = l->dhcp_dns_servers;
+                l->current_dns_server = l->dns_servers;
 
         return l->current_dns_server;
 }
@@ -273,13 +265,7 @@ void link_next_dns_server(Link *l) {
         /* Switch to the next DNS server */
 
         if (!l->current_dns_server) {
-                l->current_dns_server = l->link_dns_servers;
-                if (l->current_dns_server)
-                        return;
-        }
-
-        if (!l->current_dns_server) {
-                l->current_dns_server = l->dhcp_dns_servers;
+                l->current_dns_server = l->dns_servers;
                 if (l->current_dns_server)
                         return;
         }
@@ -292,12 +278,7 @@ void link_next_dns_server(Link *l) {
                 return;
         }
 
-        if (l->current_dns_server->source == DNS_SERVER_LINK)
-                l->current_dns_server = l->dhcp_dns_servers;
-        else {
-                assert(l->current_dns_server->source == DNS_SERVER_DHCP);
-                l->current_dns_server = l->link_dns_servers;
-        }
+        l->current_dns_server = l->dns_servers;
 }
 
 int link_address_new(Link *l, LinkAddress **ret, int family, union in_addr_union *in_addr) {
diff --git a/src/resolve/resolved-link.h b/src/resolve/resolved-link.h
index bd32a702f..cef0400b2 100644
--- a/src/resolve/resolved-link.h
+++ b/src/resolve/resolved-link.h
@@ -52,8 +52,7 @@ struct Link {
 
         LIST_HEAD(LinkAddress, addresses);
 
-        LIST_HEAD(DnsServer, link_dns_servers);
-        LIST_HEAD(DnsServer, dhcp_dns_servers);
+        LIST_HEAD(DnsServer, dns_servers);
         DnsServer *current_dns_server;
 
         DnsScope *unicast_scope;
@@ -74,7 +73,7 @@ int link_update_monitor(Link *l);
 bool link_relevant(Link *l, int family);
 LinkAddress* link_find_address(Link *l, int family, union in_addr_union *in_addr);
 
-DnsServer* link_find_dns_server(Link *l, DnsServerSource source, int family, union in_addr_union *in_addr);
+DnsServer* link_find_dns_server(Link *l, int family, union in_addr_union *in_addr);
 DnsServer* link_get_dns_server(Link *l);
 void link_next_dns_server(Link *l);
 
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index 19ea678de..f4fa197d4 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -29,8 +29,6 @@
 #include "rtnl-util.h"
 #include "event-util.h"
 #include "network-util.h"
-#include "sd-dhcp-lease.h"
-#include "dhcp-lease-internal.h"
 #include "network-internal.h"
 #include "conf-parser.h"
 #include "socket-util.h"
@@ -326,7 +324,7 @@ static int parse_dns_server_string(Manager *m, const char *string) {
                 if (manager_find_dns_server(m, family, &addr))
                         continue;
 
-                r = dns_server_new(m, NULL, DNS_SERVER_SYSTEM, NULL, family, &addr);
+                r = dns_server_new(m, NULL, NULL, family, &addr);
                 if (r < 0)
                         return r;
         }
@@ -517,13 +515,9 @@ int manager_write_resolv_conf(Manager *m) {
               "# resolv.conf(5) in a different way, replace the symlink by a\n"
               "# static file or a different symlink.\n\n", f);
 
-        HASHMAP_FOREACH(l, m->links, i) {
-                LIST_FOREACH(servers, s, l->link_dns_servers)
-                        write_resolve_conf_server(s, f, &count);
-
-                LIST_FOREACH(servers, s, l->dhcp_dns_servers)
+        HASHMAP_FOREACH(l, m->links, i)
+                LIST_FOREACH(servers, s, l->dns_servers)
                         write_resolve_conf_server(s, f, &count);
-        }
 
         LIST_FOREACH(servers, s, m->dns_servers)
                 write_resolve_conf_server(s, f, &count);