diff --git a/src/sock.c b/src/sock.c
new file mode 100644
index 0000000..2eb4b6f
--- /dev/null
+++ b/src/sock.c
@@ -0,0 +1,85 @@
+/*
+ * Generic code for native (BSD-compatible) sockets
+ *
+ * Copyright 2000-2020 Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+
+#include <haproxy/api.h>
+#include <haproxy/connection.h>
+#include <haproxy/namespace.h>
+#include <haproxy/sock.h>
+#include <haproxy/tools.h>
+
+
+/* Create a socket to connect to the server in conn->dst (which MUST be valid),
+ * using the configured namespace if needed, or the one passed by the proxy
+ * protocol if required to do so. It ultimately calls socket() or socketat()
+ * and returns the FD or error code.
+ */
+int sock_create_server_socket(struct connection *conn)
+{
+	const struct netns_entry *ns = NULL;
+
+#ifdef USE_NS
+	if (objt_server(conn->target)) {
+		if (__objt_server(conn->target)->flags & SRV_F_USE_NS_FROM_PP)
+			ns = conn->proxy_netns;
+		else
+			ns = __objt_server(conn->target)->netns;
+	}
+#endif
+	return my_socketat(ns, conn->dst->ss_family, SOCK_STREAM, 0);
+}
+
+/*
+ * Retrieves the source address for the socket <fd>, with <dir> indicating
+ * if we're a listener (=0) or an initiator (!=0). It returns 0 in case of
+ * success, -1 in case of error. The socket's source address is stored in
+ * <sa> for <salen> bytes.
+ */
+int sock_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir)
+{
+	if (dir)
+		return getsockname(fd, sa, &salen);
+	else
+		return getpeername(fd, sa, &salen);
+}
+
+/*
+ * Retrieves the original destination address for the socket <fd>, with <dir>
+ * indicating if we're a listener (=0) or an initiator (!=0). It returns 0 in
+ * case of success, -1 in case of error. The socket's source address is stored
+ * in <sa> for <salen> bytes.
+ */
+int sock_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir)
+{
+	if (dir)
+		return getpeername(fd, sa, &salen);
+	else
+		return getsockname(fd, sa, &salen);
+}
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ * End:
+ */