Clean-up: utils: make utils_partial_realpath static
[lttng-tools.git] / src / common / sessiond-comm / inet.h
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6364a07a 1/*
ab5be9fa 2 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
6364a07a 3 *
ab5be9fa 4 * SPDX-License-Identifier: GPL-2.0-only
6364a07a 5 *
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6 */
7
8#ifndef _LTTCOMM_INET_H
9#define _LTTCOMM_INET_H
10
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11#include <limits.h>
12
13#include "sessiond-comm.h"
14
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15/* See man tcp(7) for more detail about this value. */
16#define LTTCOMM_INET_PROC_SYN_RETRIES_PATH "/proc/sys/net/ipv4/tcp_syn_retries"
17#define LTTCOMM_INET_PROC_FIN_TIMEOUT_PATH "/proc/sys/net/ipv4/tcp_fin_timeout"
18
19/*
20 * The timeout value of a connect() is computed with an algorithm inside the
21 * kernel using the defined TCP SYN retries so the end value in time is
22 * approximative. According to tcp(7) man page, a value of 5 is roughly 180
23 * seconds of timeout. With that information, we've computed a factor of 36
24 * (180/5) by considering that it grows linearly. This is of course uncertain
25 * but this is the best approximation we can do at runtime.
26 */
27#define LTTCOMM_INET_SYN_TIMEOUT_FACTOR 36
28
29/*
30 * Maximum timeout value in seconds of a TCP connection for both send/recv and
31 * connect operations.
32 */
33extern unsigned long lttcomm_inet_tcp_timeout;
34
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35/* Stub */
36struct lttcomm_sock;
37
38/* Net family callback */
39extern int lttcomm_create_inet_sock(struct lttcomm_sock *sock, int type,
40 int proto);
41
42extern struct lttcomm_sock *lttcomm_accept_inet_sock(struct lttcomm_sock *sock);
43extern int lttcomm_bind_inet_sock(struct lttcomm_sock *sock);
44extern int lttcomm_close_inet_sock(struct lttcomm_sock *sock);
45extern int lttcomm_connect_inet_sock(struct lttcomm_sock *sock);
46extern int lttcomm_listen_inet_sock(struct lttcomm_sock *sock, int backlog);
47
48extern ssize_t lttcomm_recvmsg_inet_sock(struct lttcomm_sock *sock, void *buf,
49 size_t len, int flags);
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50extern ssize_t lttcomm_sendmsg_inet_sock(struct lttcomm_sock *sock,
51 const void *buf, size_t len, int flags);
6364a07a 52
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53/* Initialize inet communication layer. */
54extern void lttcomm_inet_init(void);
55
6364a07a 56#endif /* _LTTCOMM_INET_H */
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