2 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License, version 2 only, as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 #ifndef _LTTCOMM_INET_H
19 #define _LTTCOMM_INET_H
23 #include "sessiond-comm.h"
25 /* See man tcp(7) for more detail about this value. */
26 #define LTTCOMM_INET_PROC_SYN_RETRIES_PATH "/proc/sys/net/ipv4/tcp_syn_retries"
27 #define LTTCOMM_INET_PROC_FIN_TIMEOUT_PATH "/proc/sys/net/ipv4/tcp_fin_timeout"
30 * The timeout value of a connect() is computed with an algorithm inside the
31 * kernel using the defined TCP SYN retries so the end value in time is
32 * approximative. According to tcp(7) man page, a value of 5 is roughly 180
33 * seconds of timeout. With that information, we've computed a factor of 36
34 * (180/5) by considering that it grows linearly. This is of course uncertain
35 * but this is the best approximation we can do at runtime.
37 #define LTTCOMM_INET_SYN_TIMEOUT_FACTOR 36
40 * Maximum timeout value in seconds of a TCP connection for both send/recv and
43 extern unsigned long lttcomm_inet_tcp_timeout
;
48 /* Net family callback */
49 extern int lttcomm_create_inet_sock(struct lttcomm_sock
*sock
, int type
,
52 extern struct lttcomm_sock
*lttcomm_accept_inet_sock(struct lttcomm_sock
*sock
);
53 extern int lttcomm_bind_inet_sock(struct lttcomm_sock
*sock
);
54 extern int lttcomm_close_inet_sock(struct lttcomm_sock
*sock
);
55 extern int lttcomm_connect_inet_sock(struct lttcomm_sock
*sock
);
56 extern int lttcomm_listen_inet_sock(struct lttcomm_sock
*sock
, int backlog
);
58 extern ssize_t
lttcomm_recvmsg_inet_sock(struct lttcomm_sock
*sock
, void *buf
,
59 size_t len
, int flags
);
60 extern ssize_t
lttcomm_sendmsg_inet_sock(struct lttcomm_sock
*sock
,
61 const void *buf
, size_t len
, int flags
);
63 /* Initialize inet communication layer. */
64 extern void lttcomm_inet_init(void);
66 #endif /* _LTTCOMM_INET_H */
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