2 * Copyright (c) 1991-1997 Regents of the University of California.
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33 * $KAME: altq_classq.h,v 1.6 2003/01/07 07:33:38 kjc Exp $
36 * class queue definitions extracted from rm_class.h.
38 #ifndef _ALTQ_ALTQ_CLASSQ_H_
39 #define _ALTQ_ALTQ_CLASSQ_H_
46 * Packet Queue types: RED or DROPHEAD.
48 #define Q_DROPHEAD 0x00
51 #define Q_DROPTAIL 0x03
57 * Packet Queue structures and macros to manipulate them.
59 struct _class_queue_ {
60 struct mbuf *tail_; /* Tail of packet queue */
61 int qlen_; /* Queue length (in number of packets) */
62 int qlim_; /* Queue limit (in number of packets*) */
63 int qsize_; /* Queue size (in number of bytes*) */
64 int qtype_; /* Queue type */
67 typedef struct _class_queue_ class_queue_t;
69 #define qtype(q) (q)->qtype_ /* Get queue type */
70 #define qlimit(q) (q)->qlim_ /* Max packets to be queued */
71 #define qlen(q) (q)->qlen_ /* Current queue length. */
72 #define qsize(q) (q)->qsize_ /* Current queue size. */
73 #define qtail(q) (q)->tail_ /* Tail of the queue */
74 #define qhead(q) ((q)->tail_ ? (q)->tail_->m_nextpkt : NULL)
76 #define qempty(q) ((q)->qlen_ == 0) /* Is the queue empty?? */
77 #define q_is_codel(q) ((q)->qtype_ == Q_CODEL) /* Is the queue a codel queue */
78 #define q_is_red(q) ((q)->qtype_ == Q_RED) /* Is the queue a red queue */
79 #define q_is_rio(q) ((q)->qtype_ == Q_RIO) /* Is the queue a rio queue */
80 #define q_is_red_or_rio(q) ((q)->qtype_ == Q_RED || (q)->qtype_ == Q_RIO)
82 #if !defined(__GNUC__) || defined(ALTQ_DEBUG)
84 extern void _addq(class_queue_t *, struct mbuf *);
85 extern struct mbuf *_getq(class_queue_t *);
86 extern struct mbuf *_getq_tail(class_queue_t *);
87 extern struct mbuf *_getq_random(class_queue_t *);
88 extern void _removeq(class_queue_t *, struct mbuf *);
89 extern void _flushq(class_queue_t *);
91 #else /* __GNUC__ && !ALTQ_DEBUG */
96 _addq(class_queue_t *q, struct mbuf *m)
100 if ((m0 = qtail(q)) != NULL)
101 m->m_nextpkt = m0->m_nextpkt;
107 qsize(q) += m_pktlen(m);
110 static __inline struct mbuf *
111 _getq(class_queue_t *q)
115 if ((m = qtail(q)) == NULL)
117 if ((m0 = m->m_nextpkt) != m)
118 m->m_nextpkt = m0->m_nextpkt;
122 qsize(q) -= m_pktlen(m0);
123 m0->m_nextpkt = NULL;
127 /* drop a packet at the tail of the queue */
128 static __inline struct mbuf *
129 _getq_tail(class_queue_t *q)
131 struct mbuf *m, *m0, *prev;
133 if ((m = m0 = qtail(q)) == NULL)
139 prev->m_nextpkt = m->m_nextpkt;
149 /* randomly select a packet in the queue */
150 static __inline struct mbuf *
151 _getq_random(class_queue_t *q)
156 if ((m = qtail(q)) == NULL)
158 if (m->m_nextpkt == m)
161 struct mbuf *prev = NULL;
163 n = random() % qlen(q) + 1;
164 for (i = 0; i < n; i++) {
168 prev->m_nextpkt = m->m_nextpkt;
178 _removeq(class_queue_t *q, struct mbuf *m)
180 struct mbuf *m0, *prev;
187 prev->m_nextpkt = m->m_nextpkt;
190 else if (qtail(q) == m)
196 _flushq(class_queue_t *q)
200 while ((m = _getq(q)) != NULL)
204 #endif /* __GNUC__ && !ALTQ_DEBUG */
212 #endif /* _ALTQ_ALTQ_CLASSQ_H_ */