From 75f20f8e144a926873b619e1c0918896689d39a0 Mon Sep 17 00:00:00 2001
From: "Timur I. Bakeyev" <timur@FreeBSD.org>
Date: Sun, 30 May 2021 03:28:09 +0200
Subject: [PATCH 07/28] Use macro value as a default backlog size for the
 `listen()` syscall.

Set that macro to -1 on FreeBSD, specifying maximum kernel configured
allowed backlog size.

Signed-off-by: Timur I. Bakeyev <timur@FreeBSD.org>
---
 lib/tevent/echo_server.c    |  2 +-
 source3/include/local.h     | 11 +++++++++++
 source3/libsmb/unexpected.c |  2 +-
 source3/utils/smbfilter.c   |  2 +-
 source3/winbindd/winbindd.c |  4 ++--
 5 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/lib/tevent/echo_server.c b/lib/tevent/echo_server.c
index f93d8bcdee7..49354dbf0e5 100644
--- a/lib/tevent/echo_server.c
+++ b/lib/tevent/echo_server.c
@@ -633,7 +633,7 @@ int main(int argc, const char **argv)
 		exit(1);
 	}
 
-	ret = listen(listen_sock, 5);
+	ret = listen(listen_sock, DEFAULT_LISTEN_BACKLOG);
 	if (ret == -1) {
 		perror("listen() failed");
 		exit(1);
diff --git a/source3/include/local.h b/source3/include/local.h
index 297e5572fdb..d85aab09f9f 100644
--- a/source3/include/local.h
+++ b/source3/include/local.h
@@ -163,7 +163,18 @@
 #define WINBIND_SERVER_MUTEX_WAIT_TIME (( ((NUM_CLI_AUTH_CONNECT_RETRIES) * ((CLI_AUTH_TIMEOUT)/1000)) + 5)*2)
 
 /* size of listen() backlog in smbd */
+#if defined (FREEBSD)
+#define SMBD_LISTEN_BACKLOG -1
+#else
 #define SMBD_LISTEN_BACKLOG 50
+#endif
+
+/* size of listen() default backlog */
+#if defined (FREEBSD)
+#define DEFAULT_LISTEN_BACKLOG -1
+#else
+#define DEFAULT_LISTEN_BACKLOG 5
+#endif
 
 /* Number of microseconds to wait before a sharing violation. */
 #define SHARING_VIOLATION_USEC_WAIT 950000
diff --git a/source3/libsmb/unexpected.c b/source3/libsmb/unexpected.c
index ced46969b88..317d6b1e0e2 100644
--- a/source3/libsmb/unexpected.c
+++ b/source3/libsmb/unexpected.c
@@ -95,7 +95,7 @@ NTSTATUS nb_packet_server_create(TALLOC_CTX *mem_ctx,
 		status = map_nt_error_from_unix(errno);
 		goto fail;
 	}
-	rc = listen(result->listen_sock, 5);
+	rc = listen(result->listen_sock, DEFAULT_LISTEN_BACKLOG);
 	if (rc < 0) {
 		status = map_nt_error_from_unix(errno);
 		goto fail;
diff --git a/source3/utils/smbfilter.c b/source3/utils/smbfilter.c
index 3fbd63975c9..b2d90f993fc 100644
--- a/source3/utils/smbfilter.c
+++ b/source3/utils/smbfilter.c
@@ -291,7 +291,7 @@ static void start_filter(char *desthost)
 		exit(1);
 	}
 
-	if (listen(s, 5) == -1) {
+	if (listen(s, DEFAULT_LISTEN_BACKLOG) == -1) {
 		d_printf("listen failed\n");
 	}
 
diff --git a/source3/winbindd/winbindd.c b/source3/winbindd/winbindd.c
index 0f9c6449a5a..c2df0c92372 100644
--- a/source3/winbindd/winbindd.c
+++ b/source3/winbindd/winbindd.c
@@ -1312,7 +1312,7 @@ static bool winbindd_setup_listeners(void)
 	if (pub_state->fd == -1) {
 		goto failed;
 	}
-	rc = listen(pub_state->fd, 5);
+	rc = listen(pub_state->fd, DEFAULT_LISTEN_BACKLOG);
 	if (rc < 0) {
 		goto failed;
 	}
@@ -1344,7 +1344,7 @@ static bool winbindd_setup_listeners(void)
 	if (priv_state->fd == -1) {
 		goto failed;
 	}
-	rc = listen(priv_state->fd, 5);
+	rc = listen(priv_state->fd, DEFAULT_LISTEN_BACKLOG);
 	if (rc < 0) {
 		goto failed;
 	}
-- 
2.37.1