freebsd-dev/sys/netinet/udp_var.h
Bjoern A. Zeeb 6a9148fe92 Implement UDP control block support.
So far the udp_tun_func_t had been (ab)using inp_ppcb for udp in kernel
tunneling callbacks.  Move that into the udpcb and add a field for flags
there to be used by upcoming changes instead of sticking udp only flags
into in_pcb flags2.

Bump __FreeBSD_version for ports to detect it and because of vnet* struct
size changes.

Submitted by:	jhb (7.x version)
Reviewed by:	rwatson
2009-05-23 16:51:13 +00:00

139 lines
4.6 KiB
C

/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)udp_var.h 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#ifndef _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_
/*
* UDP kernel structures and variables.
*/
struct udpiphdr {
struct ipovly ui_i; /* overlaid ip structure */
struct udphdr ui_u; /* udp header */
};
#define ui_x1 ui_i.ih_x1
#define ui_pr ui_i.ih_pr
#define ui_len ui_i.ih_len
#define ui_src ui_i.ih_src
#define ui_dst ui_i.ih_dst
#define ui_sport ui_u.uh_sport
#define ui_dport ui_u.uh_dport
#define ui_ulen ui_u.uh_ulen
#define ui_sum ui_u.uh_sum
typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *);
/*
* UDP control block; one per udp.
*/
struct udpcb {
udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */
u_int u_flags; /* Generic UDP flags. */
};
#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb)
#define sotoudpcb(so) (intoudpcb(sotoinpcb(so)))
struct udpstat {
/* input statistics: */
u_long udps_ipackets; /* total input packets */
u_long udps_hdrops; /* packet shorter than header */
u_long udps_badsum; /* checksum error */
u_long udps_nosum; /* no checksum */
u_long udps_badlen; /* data length larger than packet */
u_long udps_noport; /* no socket on port */
u_long udps_noportbcast; /* of above, arrived as broadcast */
u_long udps_fullsock; /* not delivered, input socket full */
u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
/* output statistics: */
u_long udps_opackets; /* total output packets */
u_long udps_fastout; /* output packets on fast path */
/* of no socket on port, arrived as multicast */
u_long udps_noportmcast;
u_long udps_filtermcast; /* blocked by multicast filter */
};
#ifdef _KERNEL
#define UDPSTAT_ADD(name, val) V_udpstat.name += (val)
#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
#endif
/*
* Names for UDP sysctl objects.
*/
#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
#define UDPCTL_STATS 2 /* statistics (read-only) */
#define UDPCTL_MAXDGRAM 3 /* max datagram size */
#define UDPCTL_RECVSPACE 4 /* default receive buffer space */
#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
#define UDPCTL_MAXID 6
#define UDPCTL_NAMES { \
{ 0, 0 }, \
{ "checksum", CTLTYPE_INT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "maxdgram", CTLTYPE_INT }, \
{ "recvspace", CTLTYPE_INT }, \
{ "pcblist", CTLTYPE_STRUCT }, \
}
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_udp);
extern struct pr_usrreqs udp_usrreqs;
#ifdef VIMAGE_GLOBALS
extern struct inpcbhead udb;
extern struct inpcbinfo udbinfo;
extern struct udpstat udpstat;
extern int udp_blackhole;
#endif
extern u_long udp_sendspace;
extern u_long udp_recvspace;
extern int udp_log_in_vain;
int udp_newudpcb(struct inpcb *);
void udp_discardcb(struct udpcb *);
void udp_ctlinput(int, struct sockaddr *, void *);
void udp_init(void);
void udp_input(struct mbuf *, int);
struct inpcb *udp_notify(struct inpcb *inp, int errno);
int udp_shutdown(struct socket *so);
int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f);
#endif
#endif