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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>
37 #define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */
38 #define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */
39 #define REDF_ECN (REDF_ECN4 | REDF_ECN6)
40 #define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */
43 * simpler versions of red parameters and statistics used by other
44 * disciplines (e.g., CBQ)
47 int th_min; /* red min threshold */
48 int th_max; /* red max threshold */
49 int inv_pmax; /* inverse of max drop probability */
54 struct pktcntr xmit_cnt;
55 struct pktcntr drop_cnt;
65 /* weight table structure for idle time calibration */
75 int red_pkttime; /* average packet time in micro sec
76 used for idle calibration */
77 int red_flags; /* red flags */
80 int red_weight; /* weight for EWMA */
81 int red_inv_pmax; /* inverse of max drop probability */
82 int red_thmin; /* red min threshold */
83 int red_thmax; /* red max threshold */
85 /* variables for internal use */
86 int red_wshift; /* log(red_weight) */
87 int red_thmin_s; /* th_min scaled by avgshift */
88 int red_thmax_s; /* th_max scaled by avgshift */
89 int red_probd; /* drop probability denominator */
91 int red_avg; /* queue len avg scaled by avgshift */
92 int red_count; /* packet count since last dropped/
94 int red_idle; /* queue was empty */
95 int red_old; /* avg is above th_min */
96 struct wtab *red_wtab; /* weight table */
97 struct timeval red_last; /* time when the queue becomes idle */
101 struct pktcntr xmit_cnt;
102 struct pktcntr drop_cnt;
105 u_int marked_packets;
111 #define DTYPE_NODROP 0 /* no drop */
112 #define DTYPE_FORCED 1 /* a "forced" drop */
113 #define DTYPE_EARLY 2 /* an "unforced" (early) drop */
115 extern red_t *red_alloc(int, int, int, int, int, int);
116 extern void red_destroy(red_t *);
117 extern void red_getstats(red_t *, struct redstats *);
118 extern int red_addq(red_t *, class_queue_t *, struct mbuf *,
119 struct altq_pktattr *);
120 extern struct mbuf *red_getq(red_t *, class_queue_t *);
121 extern int drop_early(int, int, int);
122 extern int mark_ecn(struct mbuf *, struct altq_pktattr *, int);
123 extern struct wtab *wtab_alloc(int);
124 extern int wtab_destroy(struct wtab *);
125 extern int32_t pow_w(struct wtab *, int);
129 #endif /* _ALTQ_ALTQ_RED_H_ */