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26 * $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $
30 #ifndef _ALTQ_ALTQ_RIO_H_
31 #define _ALTQ_ALTQ_RIO_H_
33 #include <net/altq/altq_classq.h>
36 * RIO: RED with IN/OUT bit
37 * (extended to support more than 2 drop precedence values)
39 #define RIO_NDROPPREC 3 /* number of drop precedence values */
42 #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
43 #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
44 #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6)
45 #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
50 /* per drop precedence structure */
51 struct dropprec_state {
53 int inv_pmax; /* inverse of max drop probability */
54 int th_min; /* red min threshold */
55 int th_max; /* red max threshold */
57 /* variables for internal use */
58 int th_min_s; /* th_min scaled by avgshift */
59 int th_max_s; /* th_max scaled by avgshift */
60 int probd; /* drop probability denominator */
62 int qlen; /* queue length */
63 int avg; /* (scaled) queue length average */
64 int count; /* packet count since the last dropped/
66 int idle; /* queue was empty */
67 int old; /* avg is above th_min */
68 struct timeval last; /* timestamp when queue becomes idle */
69 } rio_precstate[RIO_NDROPPREC];
71 int rio_wshift; /* log(red_weight) */
72 int rio_weight; /* weight for EWMA */
73 struct wtab *rio_wtab; /* weight table */
75 int rio_pkttime; /* average packet time in micro sec
76 used for idle calibration */
77 int rio_flags; /* rio flags */
79 u_int8_t rio_codepoint; /* codepoint value to tag packets */
80 u_int8_t rio_codepointmask; /* codepoint mask bits */
82 struct redstats q_stats[RIO_NDROPPREC]; /* statistics */
85 extern rio_t *rio_alloc(int, struct redparams *, int, int);
86 extern void rio_destroy(rio_t *);
87 extern void rio_getstats(rio_t *, struct redstats *);
88 extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *,
89 struct altq_pktattr *);
90 extern struct mbuf *rio_getq(rio_t *, class_queue_t *);
94 #endif /* _ALTQ_ALTQ_RIO_H_ */