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| author | djm@openbsd.org <djm@openbsd.org> | 2024-12-07 11:05:36 +0100 |
|---|---|---|
| committer | Damien Miller <djm@mindrot.org> | 2024-12-07 11:22:56 +0100 |
| commit | 5a6ddf946cf105189c2c99a04f86ce95edc55fc5 (patch) | |
| tree | c210c21fd0439504b7c194c77f821e563e738b2f /log.h | |
| parent | upstream: allow glob(3) patterns for sshd_config AuthorizedKeysFile (diff) | |
| download | openssh-5a6ddf946cf105189c2c99a04f86ce95edc55fc5.tar.xz openssh-5a6ddf946cf105189c2c99a04f86ce95edc55fc5.zip | |
upstream: add infrastructure for ratelimited logging; feedback/ok
dtucker
OpenBSD-Commit-ID: 18a83e5ac09d59aaf1e834fd6b796db89dd842e7
Diffstat (limited to 'log.h')
| -rw-r--r-- | log.h | 26 |
1 files changed, 25 insertions, 1 deletions
@@ -1,4 +1,4 @@ -/* $OpenBSD: log.h,v 1.34 2024/06/27 22:36:44 djm Exp $ */ +/* $OpenBSD: log.h,v 1.35 2024/12/07 10:05:37 djm Exp $ */ /* * Author: Tatu Ylonen <ylo@cs.hut.fi> @@ -81,6 +81,30 @@ void sshfatal(const char *, const char *, int, int, void sshlogdirect(LogLevel, int, const char *, ...) __attribute__((format(printf, 3, 4))); +struct log_ratelimit_ctx { + /* configuration */ + u_int threshold; /* events per second */ + u_int max_accum; /* max events to accumulate */ + u_int hysteresis; /* seconds */ + u_int log_every; /* seconds */ + + /* state */ + time_t last_event; + u_int accumulated_events; /* used for threshold comparisons */ + + /* state while actively rate-limiting */ + int ratelimit_active; + time_t ratelimit_start; + time_t last_log; + time_t hysteresis_start; + u_int ratelimited_events; +}; + +void log_ratelimit_init(struct log_ratelimit_ctx *rl, u_int threshold, + u_int max_accum, u_int hysteresis, u_int log_every); +int log_ratelimit(struct log_ratelimit_ctx *rl, time_t now, int *active, + u_int *events_dropped); + #define do_log2(level, ...) sshlog(__FILE__, __func__, __LINE__, 0, level, NULL, __VA_ARGS__) #define debug3(...) sshlog(__FILE__, __func__, __LINE__, 0, SYSLOG_LEVEL_DEBUG3, NULL, __VA_ARGS__) #define debug2(...) sshlog(__FILE__, __func__, __LINE__, 0, SYSLOG_LEVEL_DEBUG2, NULL, __VA_ARGS__) |