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 33#ifndef _NETINET_UDP_VAR_H_ 34#define _NETINET_UDP_VAR_H_ 35 36#include <sys/types.h> 37#include <netinet/ip_var.h> 38#include <netinet/udp.h> 39 40/* 41 * UDP kernel structures and variables. 42 */ 43struct udpiphdr { 44 struct ipovly ui_i; /* overlaid ip structure */ 45 struct udphdr ui_u; /* udp header */ 46}; 47#define ui_x1 ui_i.ih_x1 48#define ui_v ui_i.ih_x1[0] 49#define ui_pr ui_i.ih_pr 50#define ui_len ui_i.ih_len 51#define ui_src ui_i.ih_src 52#define ui_dst ui_i.ih_dst 53#define ui_sport ui_u.uh_sport 54#define ui_dport ui_u.uh_dport 55#define ui_ulen ui_u.uh_ulen 56#define ui_sum ui_u.uh_sum 57 58/* 59 * Identifiers for UDP sysctl nodes. 60 */ 61#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 62#define UDPCTL_STATS 2 /* statistics (read-only) */ 63#define UDPCTL_MAXDGRAM 3 /* max datagram size */ 64#define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 65#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 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 uint64_t udps_ipackets; /* total input packets */ 76 uint64_t udps_hdrops; /* packet shorter than header */ 77 uint64_t udps_badsum; /* checksum error */ 78 uint64_t udps_nosum; /* no checksum */ 79 uint64_t udps_badlen; /* data length larger than packet */ 80 uint64_t udps_noport; /* no socket on port */ 81 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 82 uint64_t udps_fullsock; /* not delivered, input socket full */ 83 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 84 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 85 /* output statistics: */ 86 uint64_t udps_opackets; /* total output packets */ 87 uint64_t udps_fastout; /* output packets on fast path */ 88 /* of no socket on port, arrived as multicast */ 89 uint64_t udps_noportmcast; 90 uint64_t udps_filtermcast; /* blocked by multicast filter */ 91}; 92 93#ifdef _KERNEL 94#include <netinet/in_pcb.h> 95#include <sys/counter.h> 96#include <netinet/in_kdtrace.h> 97struct mbuf; 98 99typedef bool udp_tun_func_t(struct mbuf *, int, struct inpcb *, 100 const struct sockaddr *, void *); 101typedef union { 102 struct icmp *icmp; 103 struct ip6ctlparam *ip6cp; 104} udp_tun_icmp_param_t __attribute__((__transparent_union__)); 105typedef void udp_tun_icmp_t(udp_tun_icmp_param_t); 106 107/* 108 * UDP control block; one per udp. 109 */ 110struct udpcb { 111 struct inpcb u_inpcb; 112#define u_start_zero u_tun_func 113#define u_zero_size (sizeof(struct udpcb) - \ 114 offsetof(struct udpcb, u_start_zero)) 115 udp_tun_func_t *u_tun_func; /* UDP kernel tunneling callback. */ 116 udp_tun_icmp_t *u_icmp_func; /* UDP kernel tunneling icmp callback */ 117 u_int u_flags; /* Generic UDP flags. */ 118 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 119 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 120 void *u_tun_ctx; /* Tunneling callback context. */ 121}; 122 123#define intoudpcb(ip) __containerof((inp), struct udpcb, u_inpcb) 124#define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 125 126VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 127/* 128 * In-kernel consumers can use these accessor macros directly to update 129 * stats. 130 */ 131#define UDPSTAT_ADD(name, val) \ 132 do { \ 133 MIB_SDT_PROBE1(udp, count, name, (val)); \ 134 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)); \ 135 } while (0) 136#define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 137 138/* 139 * Kernel module consumers must use this accessor macro. 140 */ 141void kmod_udpstat_inc(int statnum); 142#define KMOD_UDPSTAT_INC(name) \ 143 do { \ 144 MIB_SDT_PROBE1(udp, count, name, 1); \ 145 kmod_udpstat_inc( \ 146 offsetof(struct udpstat, name) / sizeof(uint64_t)); \ 147 } while (0) 148 149SYSCTL_DECL(_net_inet_udp); 150 151VNET_DECLARE(struct inpcbinfo, udbinfo); 152VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 153#define V_udbinfo VNET(udbinfo) 154#define V_ulitecbinfo VNET(ulitecbinfo) 155 156extern u_long udp_sendspace; 157extern u_long udp_recvspace; 158VNET_DECLARE(int, udp_cksum); 159VNET_DECLARE(int, udp_blackhole); 160VNET_DECLARE(bool, udp_blackhole_local); 161VNET_DECLARE(int, udp_log_in_vain); 162#define V_udp_cksum VNET(udp_cksum) 163#define V_udp_blackhole VNET(udp_blackhole) 164#define V_udp_blackhole_local VNET(udp_blackhole_local) 165#define V_udp_log_in_vain VNET(udp_log_in_vain) 166 167VNET_DECLARE(int, zero_checksum_port); 168#define V_zero_checksum_port VNET(zero_checksum_port) 169 170static __inline struct inpcbinfo * 171udp_get_inpcbinfo(int protocol) 172{ 173 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 174} 175 176int udp_ctloutput(struct socket *, struct sockopt *); 177void udplite_input(struct mbuf *, int); 178struct inpcb *udp_notify(struct inpcb *inp, int errno); 179int udp_shutdown(struct socket *, enum shutdown_how); 180 181int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 182 udp_tun_icmp_t i, void *ctx); 183 184#ifdef _SYS_PROTOSW_H_ 185pr_abort_t udp_abort; 186pr_disconnect_t udp_disconnect; 187pr_send_t udp_send; 188#endif 189 190#endif /* _KERNEL */ 191 192#endif /* _NETINET_UDP_VAR_H_ */ 193