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