resolved: use one UDP socket per transaction

We used to have one global socket, use one per transaction instead. This
has the side-effect of giving us a random UDP port per transaction, and
hence increasing the entropy and making cache poisoining significantly
harder to achieve.

We still reuse the same port number for packets belonging to the same
transaction (resent packets).

1 files changed, 0 insertions, 9 deletions

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);