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-rw-r--r--net/dccp/dccp.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index f4a5ea116e34..07dcbe73b50c 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -74,9 +74,12 @@ extern void dccp_time_wait(struct sock *sk, int state, int timeo);
74 74
75#define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */ 75#define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */
76 76
77/* bounds for sampled RTT values from packet exchanges (in usec) */ 77/*
78 * RTT sampling: sanity bounds and fallback RTT value from RFC 4340, section 3.4
79 */
78#define DCCP_SANE_RTT_MIN 100 80#define DCCP_SANE_RTT_MIN 100
79#define DCCP_SANE_RTT_MAX (4 * USEC_PER_SEC) 81#define DCCP_FALLBACK_RTT (USEC_PER_SEC / 5)
82#define DCCP_SANE_RTT_MAX (3 * USEC_PER_SEC)
80 83
81/* Maximal interval between probes for local resources. */ 84/* Maximal interval between probes for local resources. */
82#define DCCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ / 2U)) 85#define DCCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ / 2U))