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664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*
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* Copyright (c) 1998 Luigi Rizzo
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*
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* $FreeBSD$
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*/
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#ifndef _IP_DUMMYNET_H
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#define _IP_DUMMYNET_H
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/*
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* Definition of dummynet data structures.
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* Dummynet handles a list of pipes, each one identified by a unique
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* number (hopefully the list is short so we use a linked list).
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*
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* Each list contains a set of parameters identifying the pipe, and
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* a set of packets queued on the pipe itself.
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*
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* I could have used queue macros, but the management i have
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* is pretty simple and this makes the code more portable.
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*/
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/*
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* struct dn_pkt identifies a packet in the dummynet queue. The
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* first part is really an m_hdr for implementation purposes, and some
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* fields are saved there. When passing the packet back to the ip_input/
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* ip_output(), the struct is prepended to the mbuf chain with type
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* MT_DUMMYNET, and contains the pointer to the matching rule.
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*/
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struct dn_pkt {
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struct m_hdr hdr ;
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#define dn_next hdr.mh_nextpkt /* next element in queue */
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#define dn_m hdr.mh_next /* packet to be forwarded */
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#define dn_dst hdr.mh_len /* dst, for ip_output */
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#define dn_dir hdr.mh_flags /* IP_FW_F_IN or IP_FW_F_OUT */
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int delay; /* stays queued until delay=0 */
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struct ifnet *ifp; /* interface, for ip_output */
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struct route ro; /* route, for ip_output. MUST COPY */
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int flags; /* flags, for ip_output */
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#ifdef DUMMYNET_DEBUG
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struct timeval beg, mid; /* testing only */
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int act_delay; /* testing only */
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int in_delay; /* testing only */
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#endif
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};
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struct dn_queue {
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struct dn_pkt *head, *tail;
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} ;
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/*
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* descriptor of a pipe. The flags field will be used to speed up the
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* forwarding code paths, in case some of the parameters are not
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* used.
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*/
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struct dn_pipe { /* a pipe */
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struct dn_pipe *next ;
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u_short pipe_nr ; /* number */
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u_short flags ; /* to speed up things */
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#define DN_HAVE_BW 1
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#define DN_HAVE_QUEUE 2
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#define DN_HAVE_DELAY 4
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int bandwidth; /* really, bytes/tick. */
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int queue_size ;
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int queue_size_bytes ;
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int delay ; /* really, ticks */
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int plr ; /* pkt loss rate (2^31-1 means 100%) */
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struct dn_queue r;
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int r_len; /* elements in r_queue */
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int r_len_bytes; /* bytes in r_queue */
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int r_drops; /* drops from r_queue */
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struct dn_queue p ;
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int ticks_from_last_insert;
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long numbytes; /* which can send or receive */
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};
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/*
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* The following is used to define a new mbuf type that is
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* prepended to the packet when it comes out of a pipe. The definition
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* ought to go in /sys/sys/mbuf.h but here it is less intrusive.
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*/
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#define MT_DUMMYNET MT_CONTROL
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/*
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* what to do of a packet when it comes out of a pipe
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*/
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#define DN_TO_IP_OUT 1
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#define DN_TO_IP_IN 2
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#define DN_TO_BDG_FWD 3
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#ifdef _KERNEL
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MALLOC_DECLARE(M_IPFW);
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typedef int ip_dn_ctl_t __P((struct sockopt *)) ;
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extern ip_dn_ctl_t *ip_dn_ctl_ptr;
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void dn_rule_delete(void *r); /* used in ip_fw.c */
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int dummynet_io(int pipe, int dir,
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struct mbuf *m, struct ifnet *ifp, struct route *ro,
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struct sockaddr_in * dst,
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struct ip_fw_chain *rule, int flags);
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#endif
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#endif /* _IP_DUMMYNET_H */
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