mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 1998 Luigi Rizzo
|
|
*
|
|
* Redistribution and use in source forms, with and without modification,
|
|
* are permitted provided that this entire comment appears intact.
|
|
*
|
|
* Redistribution in binary form may occur without any restrictions.
|
|
* Obviously, it would be nice if you gave credit where credit is due
|
|
* but requiring it would be too onerous.
|
|
*
|
|
* This software is provided ``AS IS'' without any warranties of any kind.
|
|
*
|
|
* $Id: ip_dummynet.h,v 1.2 1998/12/14 18:09:13 luigi Exp $
|
|
*/
|
|
|
|
#ifndef _IP_DUMMYNET_H
|
|
#define _IP_DUMMYNET_H
|
|
|
|
/*
|
|
* Definition of dummynet data structures.
|
|
* Dummynet handles a list of pipes, each one identified by a unique
|
|
* number (hopefully the list is short so we use a linked list).
|
|
*
|
|
* Each list contains a set of parameters identifying the pipe, and
|
|
* a set of packets queued on the pipe itself.
|
|
*
|
|
* I could have used queue macros, but the management i have
|
|
* is pretty simple and this makes the code more portable.
|
|
*/
|
|
|
|
/*
|
|
* struct dn_pkt identifies a packet in the dummynet queue. The
|
|
* first part is really an m_hdr for implementation purposes, and some
|
|
* fields are saved there. When passing the packet back to the ip_input/
|
|
* ip_output(), the struct is prepended to the mbuf chain with type
|
|
* MT_DUMMYNET, and contains the pointer to the matching rule.
|
|
*/
|
|
struct dn_pkt {
|
|
struct m_hdr hdr ;
|
|
#define dn_next hdr.mh_nextpkt /* next element in queue */
|
|
#define dn_m hdr.mh_next /* packet to be forwarded */
|
|
#define dn_hlen hdr.mh_len /* hlen, for ip_output */
|
|
#define dn_dir hdr.mh_flags /* IP_FW_F_IN or IP_FW_F_OUT */
|
|
int delay; /* stays queued until delay=0 */
|
|
struct ifnet *ifp; /* interface, for ip_output */
|
|
struct route ro; /* route, for ip_output. MUST COPY */
|
|
|
|
#ifdef DUMMYNET_DEBUG
|
|
struct timeval beg, mid; /* testing only */
|
|
int act_delay; /* testing only */
|
|
int in_delay; /* testing only */
|
|
#endif
|
|
};
|
|
|
|
struct dn_queue {
|
|
struct dn_pkt *head, *tail;
|
|
} ;
|
|
|
|
/*
|
|
* descriptor of a pipe. The flags field will be used to speed up the
|
|
* forwarding code paths, in case some of the parameters are not
|
|
* used.
|
|
*/
|
|
struct dn_pipe { /* a pipe */
|
|
struct dn_pipe *next ;
|
|
|
|
u_short pipe_nr ; /* number */
|
|
u_short flags ; /* to speed up things */
|
|
#define DN_HAVE_BW 1
|
|
#define DN_HAVE_QUEUE 2
|
|
#define DN_HAVE_DELAY 4
|
|
int bandwidth; /* really, bytes/tick. */
|
|
int queue_size ;
|
|
int queue_size_bytes ;
|
|
int delay ; /* really, ticks */
|
|
int plr ; /* pkt loss rate (2^31-1 means 100%) */
|
|
|
|
struct dn_queue r;
|
|
int r_len; /* elements in r_queue */
|
|
int r_len_bytes; /* bytes in r_queue */
|
|
int r_drops; /* drops from r_queue */
|
|
struct dn_queue p ;
|
|
int ticks_from_last_insert;
|
|
long numbytes; /* which can send or receive */
|
|
};
|
|
|
|
/*
|
|
* The following is used to define a new mbuf type that is
|
|
* prepended to the packet when it comes out of a pipe. The definition
|
|
* ought to go in /sys/sys/mbuf.h but here it is less intrusive.
|
|
*/
|
|
|
|
#define MT_DUMMYNET MT_CONTROL
|
|
/*
|
|
* what to do of a packet when it comes out of a pipe
|
|
*/
|
|
#define DN_TO_IP_OUT 1
|
|
#define DN_TO_IP_IN 2
|
|
#define DN_TO_BDG_FWD 3
|
|
|
|
#ifdef KERNEL
|
|
|
|
MALLOC_DECLARE(M_IPFW);
|
|
|
|
typedef int ip_dn_ctl_t __P((struct sockopt *)) ;
|
|
extern ip_dn_ctl_t *ip_dn_ctl_ptr;
|
|
|
|
void ip_dn_init(void); /* called in ip_input.c */
|
|
void dn_rule_delete(void *r); /* used in ip_fw.c */
|
|
int dummynet_io(int pipe, int dir,
|
|
struct mbuf *m, struct ifnet *ifp, struct route *ro, int hlen,
|
|
struct ip_fw_chain *rule);
|
|
#endif /* KERNEL */
|
|
|
|
#endif /* _IP_DUMMYNET_H */
|