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26 * $KAME: altq_red.h,v 1.8 2003/07/10 12:07:49 kjc Exp $
29 #ifndef _ALTQ_ALTQ_RED_H_
30 #define _ALTQ_ALTQ_RED_H_
32 #include <net/altq/altq_classq.h>
35 #define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */
36 #define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */
37 #define REDF_ECN (REDF_ECN4 | REDF_ECN6)
38 #define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */
41 * simpler versions of red parameters and statistics used by other
42 * disciplines (e.g., CBQ)
45 int th_min; /* red min threshold */
46 int th_max; /* red max threshold */
47 int inv_pmax; /* inverse of max drop probability */
52 struct pktcntr xmit_cnt;
53 struct pktcntr drop_cnt;
61 /* weight table structure for idle time calibration */
71 int red_pkttime; /* average packet time in micro sec
72 used for idle calibration */
73 int red_flags; /* red flags */
76 int red_weight; /* weight for EWMA */
77 int red_inv_pmax; /* inverse of max drop probability */
78 int red_thmin; /* red min threshold */
79 int red_thmax; /* red max threshold */
81 /* variables for internal use */
82 int red_wshift; /* log(red_weight) */
83 int red_thmin_s; /* th_min scaled by avgshift */
84 int red_thmax_s; /* th_max scaled by avgshift */
85 int red_probd; /* drop probability denominator */
87 int red_avg; /* queue len avg scaled by avgshift */
88 int red_count; /* packet count since last dropped/
90 int red_idle; /* queue was empty */
91 int red_old; /* avg is above th_min */
92 struct wtab *red_wtab; /* weight table */
93 struct timeval red_last; /* time when the queue becomes idle */
96 struct pktcntr xmit_cnt;
97 struct pktcntr drop_cnt;
100 u_int marked_packets;
105 #define DTYPE_NODROP 0 /* no drop */
106 #define DTYPE_FORCED 1 /* a "forced" drop */
107 #define DTYPE_EARLY 2 /* an "unforced" (early) drop */
109 extern red_t *red_alloc(int, int, int, int, int, int);
110 extern void red_destroy(red_t *);
111 extern void red_getstats(red_t *, struct redstats *);
112 extern int red_addq(red_t *, class_queue_t *, struct mbuf *,
113 struct altq_pktattr *);
114 extern struct mbuf *red_getq(red_t *, class_queue_t *);
115 extern int drop_early(int, int, int);
116 extern int mark_ecn(struct mbuf *, struct altq_pktattr *, int);
117 extern struct wtab *wtab_alloc(int);
118 extern int wtab_destroy(struct wtab *);
119 extern int32_t pow_w(struct wtab *, int);
123 #endif /* _ALTQ_ALTQ_RED_H_ */