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33 * $KAME: altq_classq.h,v 1.6 2003/01/07 07:33:38 kjc Exp $
37 * class queue definitions extracted from rm_class.h.
39 #ifndef _ALTQ_ALTQ_CLASSQ_H_
40 #define _ALTQ_ALTQ_CLASSQ_H_
47 * Packet Queue types: RED or DROPHEAD.
49 #define Q_DROPHEAD 0x00
52 #define Q_DROPTAIL 0x03
58 * Packet Queue structures and macros to manipulate them.
60 struct _class_queue_ {
61 struct mbuf *tail_; /* Tail of packet queue */
62 int qlen_; /* Queue length (in number of packets) */
63 int qlim_; /* Queue limit (in number of packets*) */
64 int qsize_; /* Queue size (in number of bytes*) */
65 int qtype_; /* Queue type */
68 typedef struct _class_queue_ class_queue_t;
70 #define qtype(q) (q)->qtype_ /* Get queue type */
71 #define qlimit(q) (q)->qlim_ /* Max packets to be queued */
72 #define qlen(q) (q)->qlen_ /* Current queue length. */
73 #define qsize(q) (q)->qsize_ /* Current queue size. */
74 #define qtail(q) (q)->tail_ /* Tail of the queue */
75 #define qhead(q) ((q)->tail_ ? (q)->tail_->m_nextpkt : NULL)
77 #define qempty(q) ((q)->qlen_ == 0) /* Is the queue empty?? */
78 #define q_is_codel(q) ((q)->qtype_ == Q_CODEL) /* Is the queue a codel queue */
79 #define q_is_red(q) ((q)->qtype_ == Q_RED) /* Is the queue a red queue */
80 #define q_is_rio(q) ((q)->qtype_ == Q_RIO) /* Is the queue a rio queue */
81 #define q_is_red_or_rio(q) ((q)->qtype_ == Q_RED || (q)->qtype_ == Q_RIO)
83 #if !defined(__GNUC__) || defined(ALTQ_DEBUG)
85 extern void _addq(class_queue_t *, struct mbuf *);
86 extern struct mbuf *_getq(class_queue_t *);
87 extern struct mbuf *_getq_tail(class_queue_t *);
88 extern struct mbuf *_getq_random(class_queue_t *);
89 extern void _removeq(class_queue_t *, struct mbuf *);
90 extern void _flushq(class_queue_t *);
92 #else /* __GNUC__ && !ALTQ_DEBUG */
97 _addq(class_queue_t *q, struct mbuf *m)
101 if ((m0 = qtail(q)) != NULL)
102 m->m_nextpkt = m0->m_nextpkt;
108 qsize(q) += m_pktlen(m);
111 static __inline struct mbuf *
112 _getq(class_queue_t *q)
116 if ((m = qtail(q)) == NULL)
118 if ((m0 = m->m_nextpkt) != m)
119 m->m_nextpkt = m0->m_nextpkt;
123 qsize(q) -= m_pktlen(m0);
124 m0->m_nextpkt = NULL;
128 /* drop a packet at the tail of the queue */
129 static __inline struct mbuf *
130 _getq_tail(class_queue_t *q)
132 struct mbuf *m, *m0, *prev;
134 if ((m = m0 = qtail(q)) == NULL)
140 prev->m_nextpkt = m->m_nextpkt;
150 /* randomly select a packet in the queue */
151 static __inline struct mbuf *
152 _getq_random(class_queue_t *q)
157 if ((m = qtail(q)) == NULL)
159 if (m->m_nextpkt == m)
162 struct mbuf *prev = NULL;
164 n = random() % qlen(q) + 1;
165 for (i = 0; i < n; i++) {
169 prev->m_nextpkt = m->m_nextpkt;
179 _removeq(class_queue_t *q, struct mbuf *m)
181 struct mbuf *m0, *prev;
188 prev->m_nextpkt = m->m_nextpkt;
191 else if (qtail(q) == m)
197 _flushq(class_queue_t *q)
201 while ((m = _getq(q)) != NULL)
205 #endif /* __GNUC__ && !ALTQ_DEBUG */
213 #endif /* _ALTQ_ALTQ_CLASSQ_H_ */