1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 33 * $FreeBSD$ 34 */ 35 36#ifndef _NETINET_UDP_VAR_H_ 37#define _NETINET_UDP_VAR_H_ 38 39/* 40 * UDP kernel structures and variables. 41 */ 42struct udpiphdr { 43 struct ipovly ui_i; /* overlaid ip structure */ 44 struct udphdr ui_u; /* udp header */ 45}; 46#define ui_x1 ui_i.ih_x1 47#define ui_v ui_i.ih_x1[0] 48#define ui_pr ui_i.ih_pr 49#define ui_len ui_i.ih_len 50#define ui_src ui_i.ih_src 51#define ui_dst ui_i.ih_dst 52#define ui_sport ui_u.uh_sport 53#define ui_dport ui_u.uh_dport 54#define ui_ulen ui_u.uh_ulen 55#define ui_sum ui_u.uh_sum 56 57struct inpcb; 58struct mbuf; 59 60typedef void(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *, 61 const struct sockaddr *, void *); 62typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *); 63 64/* 65 * UDP control block; one per udp. 66 */ 67struct udpcb { 68 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 69 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */ 70 u_int u_flags; /* Generic UDP flags. */ 71 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 72 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 73 void *u_tun_ctx; /* Tunneling callback context. */ 74}; 75 76#define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 77#define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 78 79 /* IPsec: ESP in UDP tunneling: */ 80#define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 81 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 82 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 83#define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 84 85struct udpstat { 86 /* input statistics: */ 87 uint64_t udps_ipackets; /* total input packets */ 88 uint64_t udps_hdrops; /* packet shorter than header */ 89 uint64_t udps_badsum; /* checksum error */ 90 uint64_t udps_nosum; /* no checksum */ 91 uint64_t udps_badlen; /* data length larger than packet */ 92 uint64_t udps_noport; /* no socket on port */ 93 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 94 uint64_t udps_fullsock; /* not delivered, input socket full */ 95 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 96 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 97 /* output statistics: */ 98 uint64_t udps_opackets; /* total output packets */ 99 uint64_t udps_fastout; /* output packets on fast path */ 100 /* of no socket on port, arrived as multicast */ 101 uint64_t udps_noportmcast; 102 uint64_t udps_filtermcast; /* blocked by multicast filter */ 103}; 104 105#ifdef _KERNEL 106#include <sys/counter.h> 107 108VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 109/* 110 * In-kernel consumers can use these accessor macros directly to update 111 * stats. 112 */ 113#define UDPSTAT_ADD(name, val) \ 114 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 115#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 116 117/* 118 * Kernel module consumers must use this accessor macro. 119 */ 120void kmod_udpstat_inc(int statnum); 121#define KMOD_UDPSTAT_INC(name) \ 122 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 123#endif 124 125/* 126 * Identifiers for UDP sysctl nodes. 127 */ 128#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 129#define UDPCTL_STATS 2 /* statistics (read-only) */ 130#define UDPCTL_MAXDGRAM 3 /* max datagram size */ 131#define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 132#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 133 134#ifdef _KERNEL 135#include <netinet/in_pcb.h> 136SYSCTL_DECL(_net_inet_udp); 137 138extern struct pr_usrreqs udp_usrreqs; 139VNET_DECLARE(struct inpcbhead, udb); 140VNET_DECLARE(struct inpcbinfo, udbinfo); 141VNET_DECLARE(struct inpcbhead, ulitecb); 142VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 143#define V_udb VNET(udb) 144#define V_udbinfo VNET(udbinfo) 145#define V_ulitecb VNET(ulitecb) 146#define V_ulitecbinfo VNET(ulitecbinfo) 147 148extern u_long udp_sendspace; 149extern u_long udp_recvspace; 150VNET_DECLARE(int, udp_cksum); 151VNET_DECLARE(int, udp_blackhole); 152VNET_DECLARE(int, udp_log_in_vain); 153#define V_udp_cksum VNET(udp_cksum) 154#define V_udp_blackhole VNET(udp_blackhole) 155#define V_udp_log_in_vain VNET(udp_log_in_vain) 156 157VNET_DECLARE(int, zero_checksum_port); 158#define V_zero_checksum_port VNET(zero_checksum_port) 159 160static __inline struct inpcbinfo * 161udp_get_inpcbinfo(int protocol) 162{ 163 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 164} 165 166static __inline struct inpcbhead * 167udp_get_pcblist(int protocol) 168{ 169 return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb; 170} 171 172int udp_newudpcb(struct inpcb *); 173void udp_discardcb(struct udpcb *); 174 175void udp_ctlinput(int, struct sockaddr *, void *); 176void udplite_ctlinput(int, struct sockaddr *, void *); 177int udp_ctloutput(struct socket *, struct sockopt *); 178void udp_init(void); 179void udplite_init(void); 180int udp_input(struct mbuf **, int *, int); 181void udplite_input(struct mbuf *, int); 182struct inpcb *udp_notify(struct inpcb *inp, int errno); 183int udp_shutdown(struct socket *so); 184 185int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 186 udp_tun_icmp_t i, void *ctx); 187 188#endif /* _KERNEL */ 189 190#endif /* _NETINET_UDP_VAR_H_ */ 191