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-rw-r--r--TODO1
-rw-r--r--src/resolve/resolved-dns-scope.c8
-rw-r--r--src/resolve/resolved-dns-scope.h2
-rw-r--r--src/resolve/resolved-dns-transaction.c94
-rw-r--r--src/resolve/resolved-dns-transaction.h9
-rw-r--r--src/resolve/resolved-manager.c89
-rw-r--r--src/resolve/resolved-manager.h9
7 files changed, 107 insertions, 105 deletions
diff --git a/TODO b/TODO
index c1b57beeb9..1f5023c3e5 100644
--- a/TODO
+++ b/TODO
@@ -353,7 +353,6 @@ Features:
- edns0
- dname
- cname on PTR (?)
- - maybe randomize DNS UDP source ports
* Allow multiple ExecStart= for all Type= settings, so that we can cover rescue.service nicely
diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c
index 34d4a98e82..7b72c090c2 100644
--- a/src/resolve/resolved-dns-scope.c
+++ b/src/resolve/resolved-dns-scope.c
@@ -125,7 +125,7 @@ void dns_scope_next_dns_server(DnsScope *s) {
manager_next_dns_server(s->manager);
}
-int dns_scope_emit(DnsScope *s, DnsPacket *p, DnsServer **server) {
+int dns_scope_emit(DnsScope *s, DnsTransaction *t, DnsPacket *p, DnsServer **server) {
DnsServer *srv = NULL;
union in_addr_union addr;
int ifindex = 0, r;
@@ -163,9 +163,9 @@ int dns_scope_emit(DnsScope *s, DnsPacket *p, DnsServer **server) {
return -EMSGSIZE;
if (family == AF_INET)
- fd = manager_dns_ipv4_fd(s->manager);
+ fd = transaction_dns_ipv4_fd(t);
else if (family == AF_INET6)
- fd = manager_dns_ipv6_fd(s->manager);
+ fd = transaction_dns_ipv6_fd(t);
else
return -EAFNOSUPPORT;
if (fd < 0)
@@ -700,7 +700,7 @@ static int on_conflict_dispatch(sd_event_source *es, usec_t usec, void *userdata
return 0;
}
- r = dns_scope_emit(scope, p, NULL);
+ r = dns_scope_emit(scope, NULL, p, NULL);
if (r < 0)
log_debug_errno(r, "Failed to send conflict packet: %m");
}
diff --git a/src/resolve/resolved-dns-scope.h b/src/resolve/resolved-dns-scope.h
index f836407f9b..5c5ccc71c5 100644
--- a/src/resolve/resolved-dns-scope.h
+++ b/src/resolve/resolved-dns-scope.h
@@ -65,7 +65,7 @@ struct DnsScope {
int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family);
DnsScope* dns_scope_free(DnsScope *s);
-int dns_scope_emit(DnsScope *s, DnsPacket *p, DnsServer **server);
+int dns_scope_emit(DnsScope *s, DnsTransaction *t, DnsPacket *p, DnsServer **server);
int dns_scope_tcp_socket(DnsScope *s, int family, const union in_addr_union *address, uint16_t port, DnsServer **server);
DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain);
diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c
index 3260ded424..e468f245f7 100644
--- a/src/resolve/resolved-dns-transaction.c
+++ b/src/resolve/resolved-dns-transaction.c
@@ -39,6 +39,11 @@ DnsTransaction* dns_transaction_free(DnsTransaction *t) {
dns_packet_unref(t->received);
dns_answer_unref(t->cached);
+ sd_event_source_unref(t->dns_ipv4_event_source);
+ sd_event_source_unref(t->dns_ipv6_event_source);
+ safe_close(t->dns_ipv4_fd);
+ safe_close(t->dns_ipv6_fd);
+
dns_server_unref(t->server);
dns_stream_free(t->stream);
@@ -89,6 +94,8 @@ int dns_transaction_new(DnsTransaction **ret, DnsScope *s, DnsQuestion *q) {
if (!t)
return -ENOMEM;
+ t->dns_ipv4_fd = t->dns_ipv6_fd = -1;
+
t->question = dns_question_ref(q);
do
@@ -590,7 +597,7 @@ int dns_transaction_go(DnsTransaction *t) {
DnsServer *server;
/* Try via UDP, and if that fails due to large size try via TCP */
- r = dns_scope_emit(t->scope, t->sent, &server);
+ r = dns_scope_emit(t->scope, t, t->sent, &server);
if (r >= 0)
t->server = dns_server_ref(server);
else if (r == -EMSGSIZE)
@@ -625,6 +632,91 @@ int dns_transaction_go(DnsTransaction *t) {
return 1;
}
+static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
+ DnsTransaction *t = userdata;
+ int r;
+
+ assert(t);
+ assert(t->scope);
+
+ r = manager_recv(t->scope->manager, fd, DNS_PROTOCOL_DNS, &p);
+ if (r <= 0)
+ return r;
+
+ if (dns_packet_validate_reply(p) > 0 &&
+ DNS_PACKET_ID(p) == t->id) {
+ dns_transaction_process_reply(t, p);
+ } else
+ log_debug("Invalid DNS packet.");
+
+ return 0;
+}
+
+int transaction_dns_ipv4_fd(DnsTransaction *t) {
+ const int one = 1;
+ int r;
+
+ assert(t);
+ assert(t->scope);
+ assert(t->scope->manager);
+
+ if (t->dns_ipv4_fd >= 0)
+ return t->dns_ipv4_fd;
+
+ t->dns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (t->dns_ipv4_fd < 0)
+ return -errno;
+
+ r = setsockopt(t->dns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = sd_event_add_io(t->scope->manager->event, &t->dns_ipv4_event_source, t->dns_ipv4_fd, EPOLLIN, on_dns_packet, t);
+ if (r < 0)
+ goto fail;
+
+ return t->dns_ipv4_fd;
+
+fail:
+ t->dns_ipv4_fd = safe_close(t->dns_ipv4_fd);
+ return r;
+}
+
+int transaction_dns_ipv6_fd(DnsTransaction *t) {
+ const int one = 1;
+ int r;
+
+ assert(t);
+ assert(t->scope);
+ assert(t->scope->manager);
+
+ if (t->dns_ipv6_fd >= 0)
+ return t->dns_ipv6_fd;
+
+ t->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (t->dns_ipv6_fd < 0)
+ return -errno;
+
+ r = setsockopt(t->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
+ if (r < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ r = sd_event_add_io(t->scope->manager->event, &t->dns_ipv6_event_source, t->dns_ipv6_fd, EPOLLIN, on_dns_packet, t);
+ if (r < 0)
+ goto fail;
+
+ return t->dns_ipv6_fd;
+
+fail:
+ t->dns_ipv6_fd = safe_close(t->dns_ipv6_fd);
+ return r;
+}
+
static const char* const dns_transaction_state_table[_DNS_TRANSACTION_STATE_MAX] = {
[DNS_TRANSACTION_NULL] = "null",
[DNS_TRANSACTION_PENDING] = "pending",
diff --git a/src/resolve/resolved-dns-transaction.h b/src/resolve/resolved-dns-transaction.h
index 42f846e7d1..87f342ca11 100644
--- a/src/resolve/resolved-dns-transaction.h
+++ b/src/resolve/resolved-dns-transaction.h
@@ -61,6 +61,12 @@ struct DnsTransaction {
sd_event_source *timeout_event_source;
unsigned n_attempts;
+ int dns_ipv4_fd;
+ int dns_ipv6_fd;
+
+ sd_event_source *dns_ipv4_event_source;
+ sd_event_source *dns_ipv6_event_source;
+
/* the active server */
DnsServer *server;
@@ -89,6 +95,9 @@ int dns_transaction_go(DnsTransaction *t);
void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p);
void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state);
+int transaction_dns_ipv4_fd(DnsTransaction *t);
+int transaction_dns_ipv6_fd(DnsTransaction *t);
+
const char* dns_transaction_state_to_string(DnsTransactionState p) _const_;
DnsTransactionState dns_transaction_state_from_string(const char *s) _pure_;
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index e050092a12..17de14bae1 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -404,7 +404,6 @@ int manager_new(Manager **ret) {
if (!m)
return -ENOMEM;
- m->dns_ipv4_fd = m->dns_ipv6_fd = -1;
m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1;
m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1;
m->hostname_fd = -1;
@@ -486,11 +485,6 @@ Manager *manager_free(Manager *m) {
sd_event_source_unref(m->network_event_source);
sd_network_monitor_unref(m->network_monitor);
- sd_event_source_unref(m->dns_ipv4_event_source);
- sd_event_source_unref(m->dns_ipv6_event_source);
- safe_close(m->dns_ipv4_fd);
- safe_close(m->dns_ipv6_fd);
-
manager_llmnr_stop(m);
sd_bus_slot_unref(m->prepare_for_sleep_slot);
@@ -929,89 +923,6 @@ int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {
return 1;
}
-static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
- DnsTransaction *t = NULL;
- Manager *m = userdata;
- int r;
-
- r = manager_recv(m, fd, DNS_PROTOCOL_DNS, &p);
- if (r <= 0)
- return r;
-
- if (dns_packet_validate_reply(p) > 0) {
- t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));
- if (!t)
- return 0;
-
- dns_transaction_process_reply(t, p);
-
- } else
- log_debug("Invalid DNS packet.");
-
- return 0;
-}
-
-int manager_dns_ipv4_fd(Manager *m) {
- const int one = 1;
- int r;
-
- assert(m);
-
- if (m->dns_ipv4_fd >= 0)
- return m->dns_ipv4_fd;
-
- m->dns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->dns_ipv4_fd < 0)
- return -errno;
-
- r = setsockopt(m->dns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->dns_ipv4_event_source, m->dns_ipv4_fd, EPOLLIN, on_dns_packet, m);
- if (r < 0)
- goto fail;
-
- return m->dns_ipv4_fd;
-
-fail:
- m->dns_ipv4_fd = safe_close(m->dns_ipv4_fd);
- return r;
-}
-
-int manager_dns_ipv6_fd(Manager *m) {
- const int one = 1;
- int r;
-
- assert(m);
-
- if (m->dns_ipv6_fd >= 0)
- return m->dns_ipv6_fd;
-
- m->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->dns_ipv6_fd < 0)
- return -errno;
-
- r = setsockopt(m->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->dns_ipv6_event_source, m->dns_ipv6_fd, EPOLLIN, on_dns_packet, m);
- if (r < 0)
- goto fail;
-
- return m->dns_ipv6_fd;
-
-fail:
- m->dns_ipv6_fd = safe_close(m->dns_ipv6_fd);
- return r;
-}
-
static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {
int r;
diff --git a/src/resolve/resolved-manager.h b/src/resolve/resolved-manager.h
index 4e70a5b500..005f844df2 100644
--- a/src/resolve/resolved-manager.h
+++ b/src/resolve/resolved-manager.h
@@ -65,12 +65,6 @@ struct Manager {
unsigned n_dns_streams;
/* Unicast dns */
- int dns_ipv4_fd;
- int dns_ipv6_fd;
-
- sd_event_source *dns_ipv4_event_source;
- sd_event_source *dns_ipv6_event_source;
-
LIST_HEAD(DnsServer, dns_servers);
LIST_HEAD(DnsServer, fallback_dns_servers);
DnsServer *current_dns_server;
@@ -128,9 +122,6 @@ uint32_t manager_find_mtu(Manager *m);
int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p);
int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret);
-int manager_dns_ipv4_fd(Manager *m);
-int manager_dns_ipv6_fd(Manager *m);
-
int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr);
LinkAddress* manager_find_link_address(Manager *m, int family, const union in_addr_union *in_addr);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-10-25 11:35:24 +0000