tcpwrap: execute tcpwrap check in forked client, to avoid blocking name lookups in main systemd process

src/socket.c

@@ -36,7 +36,6 @@
 #include "strv.h"
 #include "unit-name.h"
 #include "dbus-socket.h"
-#include "tcpwrap.h"
 
 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
         [SOCKET_DEAD] = UNIT_INACTIVE,
@@ -108,9 +107,6 @@ static void socket_done(Unit *u) {
         free(s->bind_to_device);
         s->bind_to_device = NULL;
 
-        free(s->tcpwrap_name);
-        s->tcpwrap_name = NULL;
-
         unit_unwatch_timer(u, &s->timer_watch);
 }
 
@@ -309,11 +305,6 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
                         "%sBindToDevice: %s\n",
                         prefix, s->bind_to_device);
 
-        if (s->tcpwrap_name)
-                fprintf(f,
-                        "%sTCPWrapName: %s\n",
-                        prefix, s->tcpwrap_name);
-
         if (s->accept)
                 fprintf(f,
                         "%sAccepted: %u\n",
@@ -1221,12 +1212,6 @@ static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
 
                         break;
                 }
-
-                if (s->tcpwrap_name)
-                        if (!socket_tcpwrap(cfd, s->tcpwrap_name)) {
-                                close_nointr_nofail(cfd);
-                                return;
-                        }
         }
 
         socket_enter_running(s, cfd);