resolved: add a generic DnsSearchDomain concept

[thirdparty/systemd.git] / src / resolve / resolved-dns-scope.c

diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c
index eaa099341f8ad565847f29f2781b5643a3ef6fa3..2e47691c567f39fe7cb640cf681fd299afd56bf7 100644 (file)
--- a/src/resolve/resolved-dns-scope.c
+++ b/src/resolve/resolved-dns-scope.c
@@ -21,15 +21,17 @@
 
 #include <netinet/tcp.h>
 
-#include "missing.h"
-#include "strv.h"
-#include "socket-util.h"
 #include "af-list.h"
-#include "random-util.h"
-#include "hostname-util.h"
+#include "alloc-util.h"
 #include "dns-domain.h"
-#include "resolved-llmnr.h"
+#include "fd-util.h"
+#include "hostname-util.h"
+#include "missing.h"
+#include "random-util.h"
 #include "resolved-dns-scope.h"
+#include "resolved-llmnr.h"
+#include "socket-util.h"
+#include "strv.h"
 
 #define MULTICAST_RATELIMIT_INTERVAL_USEC (1*USEC_PER_SEC)
 #define MULTICAST_RATELIMIT_BURST 1000
@@ -101,7 +103,6 @@ DnsScope* dns_scope_free(DnsScope *s) {
         dns_zone_flush(&s->zone);
 
         LIST_REMOVE(scopes, s->manager->dns_scopes, s);
-        strv_free(s->domains);
         free(s);
 
         return NULL;
@@ -134,11 +135,11 @@ void dns_scope_next_dns_server(DnsScope *s) {
 void dns_scope_packet_received(DnsScope *s, usec_t rtt) {
         assert(s);
 
-        if (rtt > s->max_rtt) {
-                s->max_rtt = rtt;
-                s->resend_timeout = MIN(MAX(MULTICAST_RESEND_TIMEOUT_MIN_USEC, s->max_rtt * 2),
-                                        MULTICAST_RESEND_TIMEOUT_MAX_USEC);
-        }
+        if (rtt <= s->max_rtt)
+                return;
+
+        s->max_rtt = rtt;
+        s->resend_timeout = MIN(MAX(MULTICAST_RESEND_TIMEOUT_MIN_USEC, s->max_rtt * 2), MULTICAST_RESEND_TIMEOUT_MAX_USEC);
 }
 
 void dns_scope_packet_lost(DnsScope *s, usec_t usec) {
@@ -321,7 +322,7 @@ int dns_scope_tcp_socket(DnsScope *s, int family, const union in_addr_union *add
 }
 
 DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain) {
-        char **i;
+        DnsSearchDomain *d;
 
         assert(s);
         assert(domain);
@@ -343,8 +344,8 @@ DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, co
             dns_name_equal(domain, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa") > 0)
                 return DNS_SCOPE_NO;
 
-        STRV_FOREACH(i, s->domains)
-                if (dns_name_endswith(domain, *i) > 0)
+        LIST_FOREACH(domains, d, dns_scope_get_search_domains(s))
+                if (dns_name_endswith(domain, d->name) > 0)
                         return DNS_SCOPE_YES;
 
         switch (s->protocol) {
@@ -541,6 +542,7 @@ static void dns_scope_verify_conflicts(DnsScope *s, DnsPacket *p) {
 void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p) {
         _cleanup_(dns_packet_unrefp) DnsPacket *reply = NULL;
         _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL, *soa = NULL;
+        DnsResourceKey *key = NULL;
         bool tentative = false;
         int r, fd;
 
@@ -574,7 +576,10 @@ void dns_scope_process_query(DnsScope *s, DnsStream *stream, DnsPacket *p) {
                 return;
         }
 
-        r = dns_zone_lookup(&s->zone, p->question, &answer, &soa, &tentative);
+        assert(p->question->n_keys == 1);
+        key = p->question->keys[0];
+
+        r = dns_zone_lookup(&s->zone, key, &answer, &soa, &tentative);
         if (r < 0) {
                 log_debug_errno(r, "Failed to lookup key: %m");
                 return;
@@ -812,3 +817,46 @@ void dns_scope_check_conflicts(DnsScope *scope, DnsPacket *p) {
                 dns_scope_notify_conflict(scope, p->answer->items[i].rr);
         }
 }
+
+void dns_scope_dump(DnsScope *s, FILE *f) {
+        assert(s);
+
+        if (!f)
+                f = stdout;
+
+        fputs("[Scope protocol=", f);
+        fputs(dns_protocol_to_string(s->protocol), f);
+
+        if (s->link) {
+                fputs(" interface=", f);
+                fputs(s->link->name, f);
+        }
+
+        if (s->family != AF_UNSPEC) {
+                fputs(" family=", f);
+                fputs(af_to_name(s->family), f);
+        }
+
+        fputs("]\n", f);
+
+        if (!dns_zone_is_empty(&s->zone)) {
+                fputs("ZONE:\n", f);
+                dns_zone_dump(&s->zone, f);
+        }
+
+        if (!dns_cache_is_empty(&s->cache)) {
+                fputs("CACHE:\n", f);
+                dns_cache_dump(&s->cache, f);
+        }
+}
+
+DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s) {
+
+        if (s->protocol != DNS_PROTOCOL_DNS)
+                return NULL;
+
+        if (s->link)
+                return s->link->search_domains;
+
+        return NULL;
+}