2 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
4 * SPDX-License-Identifier: GPL-2.0-only
8 #ifndef _LTTCOMM_INET_H
9 #define _LTTCOMM_INET_H
13 #include "sessiond-comm.h"
19 /* See man tcp(7) for more detail about this value. */
20 #define LTTCOMM_INET_PROC_SYN_RETRIES_PATH "/proc/sys/net/ipv4/tcp_syn_retries"
21 #define LTTCOMM_INET_PROC_FIN_TIMEOUT_PATH "/proc/sys/net/ipv4/tcp_fin_timeout"
24 * The timeout value of a connect() is computed with an algorithm inside the
25 * kernel using the defined TCP SYN retries so the end value in time is
26 * approximative. According to tcp(7) man page, a value of 5 is roughly 180
27 * seconds of timeout. With that information, we've computed a factor of 36
28 * (180/5) by considering that it grows linearly. This is of course uncertain
29 * but this is the best approximation we can do at runtime.
31 #define LTTCOMM_INET_SYN_TIMEOUT_FACTOR 36
34 * Maximum timeout value in seconds of a TCP connection for both send/recv and
37 LTTNG_EXPORT
extern unsigned long lttcomm_inet_tcp_timeout
;
42 /* Net family callback */
43 extern int lttcomm_create_inet_sock(struct lttcomm_sock
*sock
, int type
,
46 extern struct lttcomm_sock
*lttcomm_accept_inet_sock(struct lttcomm_sock
*sock
);
47 extern int lttcomm_bind_inet_sock(struct lttcomm_sock
*sock
);
48 extern int lttcomm_close_inet_sock(struct lttcomm_sock
*sock
);
49 extern int lttcomm_connect_inet_sock(struct lttcomm_sock
*sock
);
50 extern int lttcomm_listen_inet_sock(struct lttcomm_sock
*sock
, int backlog
);
52 extern ssize_t
lttcomm_recvmsg_inet_sock(struct lttcomm_sock
*sock
, void *buf
,
53 size_t len
, int flags
);
54 extern ssize_t
lttcomm_sendmsg_inet_sock(struct lttcomm_sock
*sock
,
55 const void *buf
, size_t len
, int flags
);
57 /* Initialize inet communication layer. */
58 extern void lttcomm_inet_init(void);
64 #endif /* _LTTCOMM_INET_H */
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