TFO: use IPPROTO_TCP not SOL_TCL for setsockopt, being present on more platforms

Also downgrade errors from panic-log to debug

2 files changed, 5 insertions, 6 deletions

diff --git a/src/src/daemon.c b/src/src/daemon.c
index dc49eeb85..3ace7e9db 100644
--- a/src/src/daemon.c
+++ b/src/src/daemon.c
@@ -1458,10 +1458,9 @@ if (daemon_listen && !inetd_wait_mode)
         debug_printf("listening on %s port %d\n", ipa->address, ipa->port);
 
 #ifdef TCP_FASTOPEN
-    if (setsockopt(listen_sockets[sk], SOL_TCP, TCP_FASTOPEN, &smtp_connect_backlog,
-		    sizeof(smtp_connect_backlog)))
-      log_write(0, LOG_MAIN|LOG_PANIC, "failed to set socket FASTOPEN: %s",
-	strerror(errno));
+    if (setsockopt(listen_sockets[sk], IPPROTO_TCP, TCP_FASTOPEN,
+		    &smtp_connect_backlog, sizeof(smtp_connect_backlog)))
+      DEBUG(D_any) debug_printf("setsockopt FASTOPEN: %s", strerror(errno));
 #endif
 
     /* Start listening on the bound socket, establishing the maximum backlog of
diff --git a/src/src/ip.c b/src/src/ip.c
index a8230a149..ee70cf469 100644
--- a/src/src/ip.c
+++ b/src/src/ip.c
@@ -239,8 +239,8 @@ if (fastopen)
      && errno == EOPNOTSUPP
      )
     {
-    log_write(0, LOG_MAIN|LOG_PANIC,
-	      "Tried TCP Fast Open but apparently not enabled by sysctl");
+    DEBUG(D_transport)
+      debug_printf("Tried TCP Fast Open but apparently not enabled by sysctl");
     rc = connect(sock, s_ptr, s_len);
     }
   }