udp_var.h revision 265946
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: stable/10/sys/netinet/udp_var.h 265946 2014-05-13 06:05:53Z kevlo $ 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_v ui_i.ih_x1[0] 46#define ui_pr ui_i.ih_pr 47#define ui_len ui_i.ih_len 48#define ui_src ui_i.ih_src 49#define ui_dst ui_i.ih_dst 50#define ui_sport ui_u.uh_sport 51#define ui_dport ui_u.uh_dport 52#define ui_ulen ui_u.uh_ulen 53#define ui_sum ui_u.uh_sum 54 55struct inpcb; 56struct mbuf; 57 58typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *); 59 60/* 61 * UDP control block; one per udp. 62 */ 63struct udpcb { 64 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 65 u_int u_flags; /* Generic UDP flags. */ 66 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 67 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 68}; 69 70#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 71#define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 72 73 /* IPsec: ESP in UDP tunneling: */ 74#define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 75 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 76 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 77#define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 78 79struct udpstat { 80 /* input statistics: */ 81 uint64_t udps_ipackets; /* total input packets */ 82 uint64_t udps_hdrops; /* packet shorter than header */ 83 uint64_t udps_badsum; /* checksum error */ 84 uint64_t udps_nosum; /* no checksum */ 85 uint64_t udps_badlen; /* data length larger than packet */ 86 uint64_t udps_noport; /* no socket on port */ 87 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 88 uint64_t udps_fullsock; /* not delivered, input socket full */ 89 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 90 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 91 /* output statistics: */ 92 uint64_t udps_opackets; /* total output packets */ 93 uint64_t udps_fastout; /* output packets on fast path */ 94 /* of no socket on port, arrived as multicast */ 95 uint64_t udps_noportmcast; 96 uint64_t udps_filtermcast; /* blocked by multicast filter */ 97}; 98 99#ifdef _KERNEL 100#include <sys/counter.h> 101 102VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 103/* 104 * In-kernel consumers can use these accessor macros directly to update 105 * stats. 106 */ 107#define UDPSTAT_ADD(name, val) \ 108 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 109#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 110 111/* 112 * Kernel module consumers must use this accessor macro. 113 */ 114void kmod_udpstat_inc(int statnum); 115#define KMOD_UDPSTAT_INC(name) \ 116 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 117#endif 118 119/* 120 * Names for UDP sysctl objects. 121 */ 122#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 123#define UDPCTL_STATS 2 /* statistics (read-only) */ 124#define UDPCTL_MAXDGRAM 3 /* max datagram size */ 125#define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 126#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 127#define UDPCTL_MAXID 6 128 129#ifdef _KERNEL 130SYSCTL_DECL(_net_inet_udp); 131 132extern struct pr_usrreqs udp_usrreqs; 133VNET_DECLARE(struct inpcbhead, udb); 134VNET_DECLARE(struct inpcbinfo, udbinfo); 135VNET_DECLARE(struct inpcbhead, ulitecb); 136VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 137#define V_udb VNET(udb) 138#define V_udbinfo VNET(udbinfo) 139#define V_ulitecb VNET(ulitecb) 140#define V_ulitecbinfo VNET(ulitecbinfo) 141 142extern u_long udp_sendspace; 143extern u_long udp_recvspace; 144VNET_DECLARE(int, udp_cksum); 145VNET_DECLARE(int, udp_blackhole); 146#define V_udp_cksum VNET(udp_cksum) 147#define V_udp_blackhole VNET(udp_blackhole) 148extern int udp_log_in_vain; 149 150static __inline struct inpcbinfo * 151get_inpcbinfo(uint8_t protocol) 152{ 153 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 154} 155 156static __inline struct inpcbhead * 157get_pcblist(uint8_t protocol) 158{ 159 return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb; 160} 161 162int udp_newudpcb(struct inpcb *); 163void udp_discardcb(struct udpcb *); 164 165void udp_ctlinput(int, struct sockaddr *, void *); 166void udplite_ctlinput(int, struct sockaddr *, void *); 167int udp_ctloutput(struct socket *, struct sockopt *); 168void udp_init(void); 169void udplite_init(void); 170#ifdef VIMAGE 171void udp_destroy(void); 172void udplite_destroy(void); 173#endif 174void udp_input(struct mbuf *, int); 175void udplite_input(struct mbuf *, int); 176struct inpcb *udp_notify(struct inpcb *inp, int errno); 177int udp_shutdown(struct socket *so); 178 179int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f); 180 181#endif /* _KERNEL */ 182 183#endif /* _NETINET_UDP_VAR_H_ */ 184