/*
- * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _LTTCOMM_INET_H
#define _LTTCOMM_INET_H
-#define _GNU_SOURCE
#include <limits.h>
#include "sessiond-comm.h"
+/* See man tcp(7) for more detail about this value. */
+#define LTTCOMM_INET_PROC_SYN_RETRIES_PATH "/proc/sys/net/ipv4/tcp_syn_retries"
+#define LTTCOMM_INET_PROC_FIN_TIMEOUT_PATH "/proc/sys/net/ipv4/tcp_fin_timeout"
+
+/*
+ * The timeout value of a connect() is computed with an algorithm inside the
+ * kernel using the defined TCP SYN retries so the end value in time is
+ * approximative. According to tcp(7) man page, a value of 5 is roughly 180
+ * seconds of timeout. With that information, we've computed a factor of 36
+ * (180/5) by considering that it grows linearly. This is of course uncertain
+ * but this is the best approximation we can do at runtime.
+ */
+#define LTTCOMM_INET_SYN_TIMEOUT_FACTOR 36
+
+/*
+ * Maximum timeout value in seconds of a TCP connection for both send/recv and
+ * connect operations.
+ */
+extern unsigned long lttcomm_inet_tcp_timeout;
+
/* Stub */
struct lttcomm_sock;
extern ssize_t lttcomm_recvmsg_inet_sock(struct lttcomm_sock *sock, void *buf,
size_t len, int flags);
-extern ssize_t lttcomm_sendmsg_inet_sock(struct lttcomm_sock *sock, void *buf,
- size_t len, int flags);
+extern ssize_t lttcomm_sendmsg_inet_sock(struct lttcomm_sock *sock,
+ const void *buf, size_t len, int flags);
+
+/* Initialize inet communication layer. */
+extern void lttcomm_inet_init(void);
#endif /* _LTTCOMM_INET_H */