projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | * |
| 6364a07a DG |
6 | */ |
| 7 | ||
| 8 | #ifndef _LTTCOMM_INET_H | |
| 9 | #define _LTTCOMM_INET_H | |
| 10 | ||
| 6364a07a DG |
11 | #include <limits.h> |
| 12 | ||
| 13 | #include "sessiond-comm.h" | |
| 14 | ||
| 7966af57 SM |
15 | #ifdef __cplusplus |
| 16 | extern "C" { | |
| 17 | #endif | |
| 18 | ||
| d831c249 DG |
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" | |
| 22 | ||
| 23 | /* | |
| 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. | |
| 30 | */ | |
| 31 | #define LTTCOMM_INET_SYN_TIMEOUT_FACTOR 36 | |
| 32 | ||
| 33 | /* | |
| 34 | * Maximum timeout value in seconds of a TCP connection for both send/recv and | |
| 35 | * connect operations. | |
| 36 | */ | |
| 4bd69c5f | 37 | LTTNG_EXPORT extern unsigned long lttcomm_inet_tcp_timeout; |
| d831c249 | 38 | |
| 6364a07a DG |
39 | /* Stub */ |
| 40 | struct lttcomm_sock; | |
| 41 | ||
| 42 | /* Net family callback */ | |
| 43 | extern int lttcomm_create_inet_sock(struct lttcomm_sock *sock, int type, | |
| 44 | int proto); | |
| 45 | ||
| 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); | |
| 51 | ||
| 52 | extern ssize_t lttcomm_recvmsg_inet_sock(struct lttcomm_sock *sock, void *buf, | |
| 53 | size_t len, int flags); | |
| c2d69327 JG |
54 | extern ssize_t lttcomm_sendmsg_inet_sock(struct lttcomm_sock *sock, |
| 55 | const void *buf, size_t len, int flags); | |
| 6364a07a | 56 | |
| d831c249 DG |
57 | /* Initialize inet communication layer. */ |
| 58 | extern void lttcomm_inet_init(void); | |
| 59 | ||
| 7966af57 SM |
60 | #ifdef __cplusplus |
| 61 | } | |
| 62 | #endif | |
| 63 | ||
| 6364a07a | 64 | #endif /* _LTTCOMM_INET_H */ |