udp_var.h revision 217126
1/*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 31 * $FreeBSD: head/sys/netinet/udp_var.h 217126 2011-01-07 21:40:34Z jhb $ 32 */ 33 34#ifndef _NETINET_UDP_VAR_H_ 35#define _NETINET_UDP_VAR_H_ 36 37/* 38 * UDP kernel structures and variables. 39 */ 40struct udpiphdr { 41 struct ipovly ui_i; /* overlaid ip structure */ 42 struct udphdr ui_u; /* udp header */ 43}; 44#define ui_x1 ui_i.ih_x1 45#define ui_pr ui_i.ih_pr 46#define ui_len ui_i.ih_len 47#define ui_src ui_i.ih_src 48#define ui_dst ui_i.ih_dst 49#define ui_sport ui_u.uh_sport 50#define ui_dport ui_u.uh_dport 51#define ui_ulen ui_u.uh_ulen 52#define ui_sum ui_u.uh_sum 53 54typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *); 55 56/* 57 * UDP control block; one per udp. 58 */ 59struct udpcb { 60 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 61 u_int u_flags; /* Generic UDP flags. */ 62}; 63 64#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 65#define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 66 67 /* IPsec: ESP in UDP tunneling: */ 68#define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 69 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 70 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 71#define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 72 73struct udpstat { 74 /* input statistics: */ 75 u_long udps_ipackets; /* total input packets */ 76 u_long udps_hdrops; /* packet shorter than header */ 77 u_long udps_badsum; /* checksum error */ 78 u_long udps_nosum; /* no checksum */ 79 u_long udps_badlen; /* data length larger than packet */ 80 u_long udps_noport; /* no socket on port */ 81 u_long udps_noportbcast; /* of above, arrived as broadcast */ 82 u_long udps_fullsock; /* not delivered, input socket full */ 83 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 84 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */ 85 /* output statistics: */ 86 u_long udps_opackets; /* total output packets */ 87 u_long udps_fastout; /* output packets on fast path */ 88 /* of no socket on port, arrived as multicast */ 89 u_long udps_noportmcast; 90 u_long udps_filtermcast; /* blocked by multicast filter */ 91}; 92 93#ifdef _KERNEL 94/* 95 * In-kernel consumers can use these accessor macros directly to update 96 * stats. 97 */ 98#define UDPSTAT_ADD(name, val) V_udpstat.name += (val) 99#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 100 101/* 102 * Kernel module consumers must use this accessor macro. 103 */ 104void kmod_udpstat_inc(int statnum); 105#define KMOD_UDPSTAT_INC(name) \ 106 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(u_long)) 107#endif 108 109/* 110 * Names for UDP sysctl objects. 111 */ 112#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 113#define UDPCTL_STATS 2 /* statistics (read-only) */ 114#define UDPCTL_MAXDGRAM 3 /* max datagram size */ 115#define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 116#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 117#define UDPCTL_MAXID 6 118 119#define UDPCTL_NAMES { \ 120 { 0, 0 }, \ 121 { "checksum", CTLTYPE_INT }, \ 122 { "stats", CTLTYPE_STRUCT }, \ 123 { "maxdgram", CTLTYPE_INT }, \ 124 { "recvspace", CTLTYPE_INT }, \ 125 { "pcblist", CTLTYPE_STRUCT }, \ 126} 127 128#ifdef _KERNEL 129SYSCTL_DECL(_net_inet_udp); 130 131extern struct pr_usrreqs udp_usrreqs; 132VNET_DECLARE(struct inpcbhead, udb); 133VNET_DECLARE(struct inpcbinfo, udbinfo); 134#define V_udb VNET(udb) 135#define V_udbinfo VNET(udbinfo) 136 137extern u_long udp_sendspace; 138extern u_long udp_recvspace; 139VNET_DECLARE(struct udpstat, udpstat); 140VNET_DECLARE(int, udp_blackhole); 141#define V_udpstat VNET(udpstat) 142#define V_udp_blackhole VNET(udp_blackhole) 143extern int udp_log_in_vain; 144 145int udp_newudpcb(struct inpcb *); 146void udp_discardcb(struct udpcb *); 147 148void udp_ctlinput(int, struct sockaddr *, void *); 149int udp_ctloutput(struct socket *, struct sockopt *); 150void udp_init(void); 151#ifdef VIMAGE 152void udp_destroy(void); 153#endif 154void udp_input(struct mbuf *, int); 155struct inpcb *udp_notify(struct inpcb *inp, int errno); 156int udp_shutdown(struct socket *so); 157 158int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f); 159#endif 160 161#endif 162