freebsd-skq/sys/netinet/udp_var.h

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/*-
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* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California.
* All rights reserved.
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*
* 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
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* $FreeBSD$
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*/
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#ifndef _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_
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/*
* UDP kernel structures and variables.
*/
struct udpiphdr {
struct ipovly ui_i; /* overlaid ip structure */
struct udphdr ui_u; /* udp header */
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};
#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
struct inpcb;
struct mbuf;
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)))
/* IPsec: ESP in UDP tunneling: */
#define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */
/* .. per draft-ietf-ipsec-nat-t-ike-0[01],
* and draft-ietf-ipsec-udp-encaps-(00/)01.txt */
#define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */
struct udpstat {
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/* 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 */
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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 */
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/* 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;
Import rewrite of IPv4 socket multicast layer to support source-specific and protocol-independent host mode multicast. The code is written to accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work. This change only pertains to FreeBSD's use as a multicast end-station and does not concern multicast routing; for an IGMPv3/MLDv2 router implementation, consider the XORP project. The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6, which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html Summary * IPv4 multicast socket processing is now moved out of ip_output.c into a new module, in_mcast.c. * The in_mcast.c module implements the IPv4 legacy any-source API in terms of the protocol-independent source-specific API. * Source filters are lazy allocated as the common case does not use them. They are part of per inpcb state and are covered by the inpcb lock. * struct ip_mreqn is now supported to allow applications to specify multicast joins by interface index in the legacy IPv4 any-source API. * In UDP, an incoming multicast datagram only requires that the source port matches the 4-tuple if the socket was already bound by source port. An unbound socket SHOULD be able to receive multicasts sent from an ephemeral source port. * The UDP socket multicast filter mode defaults to exclusive, that is, sources present in the per-socket list will be blocked from delivery. * The RFC 3678 userland functions have been added to libc: setsourcefilter, getsourcefilter, setipv4sourcefilter, getipv4sourcefilter. * Definitions for IGMPv3 are merged but not yet used. * struct sockaddr_storage is now referenced from <netinet/in.h>. It is therefore defined there if not already declared in the same way as for the C99 types. * The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF which are then interpreted as interface indexes) is now deprecated. * A patch for the Rhyolite.com routed in the FreeBSD base system is available in the -net archives. This only affects individuals running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces. * Make IPv6 detach path similar to IPv4's in code flow; functionally same. * Bump __FreeBSD_version to 700048; see UPDATING. This work was financially supported by another FreeBSD committer. Obtained from: p4://bms_netdev Submitted by: Wilbert de Graaf (original work) Reviewed by: rwatson (locking), silence from fenner, net@ (but with encouragement)
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u_long udps_filtermcast; /* blocked by multicast filter */
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};
#ifdef _KERNEL
/*
* In-kernel consumers can use these accessor macros directly to update
* stats.
*/
#define UDPSTAT_ADD(name, val) V_udpstat.name += (val)
#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1)
/*
* Kernel module consumers must use this accessor macro.
*/
void kmod_udpstat_inc(int statnum);
#define KMOD_UDPSTAT_INC(name) \
kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(u_long))
#endif
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/*
* Names for UDP sysctl objects.
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*/
#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
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#define UDPCTL_NAMES { \
{ 0, 0 }, \
{ "checksum", CTLTYPE_INT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "maxdgram", CTLTYPE_INT }, \
{ "recvspace", CTLTYPE_INT }, \
{ "pcblist", CTLTYPE_STRUCT }, \
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}
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_udp);
extern struct pr_usrreqs udp_usrreqs;
Build on Jeff Roberson's linker-set based dynamic per-CPU allocator (DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith)
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VNET_DECLARE(struct inpcbhead, udb);
VNET_DECLARE(struct inpcbinfo, udbinfo);
#define V_udb VNET(udb)
#define V_udbinfo VNET(udbinfo)
Build on Jeff Roberson's linker-set based dynamic per-CPU allocator (DPCPU), as suggested by Peter Wemm, and implement a new per-virtual network stack memory allocator. Modify vnet to use the allocator instead of monolithic global container structures (vinet, ...). This change solves many binary compatibility problems associated with VIMAGE, and restores ELF symbols for virtualized global variables. Each virtualized global variable exists as a "reference copy", and also once per virtual network stack. Virtualized global variables are tagged at compile-time, placing the in a special linker set, which is loaded into a contiguous region of kernel memory. Virtualized global variables in the base kernel are linked as normal, but those in modules are copied and relocated to a reserved portion of the kernel's vnet region with the help of a the kernel linker. Virtualized global variables exist in per-vnet memory set up when the network stack instance is created, and are initialized statically from the reference copy. Run-time access occurs via an accessor macro, which converts from the current vnet and requested symbol to a per-vnet address. When "options VIMAGE" is not compiled into the kernel, normal global ELF symbols will be used instead and indirection is avoided. This change restores static initialization for network stack global variables, restores support for non-global symbols and types, eliminates the need for many subsystem constructors, eliminates large per-subsystem structures that caused many binary compatibility issues both for monitoring applications (netstat) and kernel modules, removes the per-function INIT_VNET_*() macros throughout the stack, eliminates the need for vnet_symmap ksym(2) munging, and eliminates duplicate definitions of virtualized globals under VIMAGE_GLOBALS. Bump __FreeBSD_version and update UPDATING. Portions submitted by: bz Reviewed by: bz, zec Discussed with: gnn, jamie, jeff, jhb, julian, sam Suggested by: peter Approved by: re (kensmith)
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extern u_long udp_sendspace;
extern u_long udp_recvspace;
VNET_DECLARE(int, udp_cksum);
VNET_DECLARE(struct udpstat, udpstat);
VNET_DECLARE(int, udp_blackhole);
#define V_udp_cksum VNET(udp_cksum)
#define V_udpstat VNET(udpstat)
#define V_udp_blackhole VNET(udp_blackhole)
extern int udp_log_in_vain;
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int udp_newudpcb(struct inpcb *);
void udp_discardcb(struct udpcb *);
void udp_ctlinput(int, struct sockaddr *, void *);
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int udp_ctloutput(struct socket *, struct sockopt *);
void udp_init(void);
#ifdef VIMAGE
void udp_destroy(void);
#endif
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);
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#endif
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#endif