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 #include <sys/types.h> 40 #include <netinet/ip_var.h> 41 #include <netinet/udp.h> 42 43 /* 44 * UDP kernel structures and variables. 45 */ 46 struct udpiphdr { 47 struct ipovly ui_i; /* overlaid ip structure */ 48 struct udphdr ui_u; /* udp header */ 49 }; 50 #define ui_x1 ui_i.ih_x1 51 #define ui_v ui_i.ih_x1[0] 52 #define ui_pr ui_i.ih_pr 53 #define ui_len ui_i.ih_len 54 #define ui_src ui_i.ih_src 55 #define ui_dst ui_i.ih_dst 56 #define ui_sport ui_u.uh_sport 57 #define ui_dport ui_u.uh_dport 58 #define ui_ulen ui_u.uh_ulen 59 #define ui_sum ui_u.uh_sum 60 61 struct inpcb; 62 struct mbuf; 63 64 #ifdef _KERNEL 65 typedef bool(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *, 66 const struct sockaddr *, void *); 67 typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *); 68 69 /* 70 * UDP control block; one per udp. 71 */ 72 struct udpcb { 73 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 74 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */ 75 u_int u_flags; /* Generic UDP flags. */ 76 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 77 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 78 void *u_tun_ctx; /* Tunneling callback context. */ 79 }; 80 81 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 82 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 83 #endif 84 85 /* IPsec: ESP in UDP tunneling: */ 86 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 87 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 88 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 89 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 90 91 struct udpstat { 92 /* input statistics: */ 93 uint64_t udps_ipackets; /* total input packets */ 94 uint64_t udps_hdrops; /* packet shorter than header */ 95 uint64_t udps_badsum; /* checksum error */ 96 uint64_t udps_nosum; /* no checksum */ 97 uint64_t udps_badlen; /* data length larger than packet */ 98 uint64_t udps_noport; /* no socket on port */ 99 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 100 uint64_t udps_fullsock; /* not delivered, input socket full */ 101 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 102 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 103 /* output statistics: */ 104 uint64_t udps_opackets; /* total output packets */ 105 uint64_t udps_fastout; /* output packets on fast path */ 106 /* of no socket on port, arrived as multicast */ 107 uint64_t udps_noportmcast; 108 uint64_t udps_filtermcast; /* blocked by multicast filter */ 109 }; 110 111 #ifdef _KERNEL 112 #include <sys/counter.h> 113 114 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 115 /* 116 * In-kernel consumers can use these accessor macros directly to update 117 * stats. 118 */ 119 #define UDPSTAT_ADD(name, val) \ 120 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 121 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 122 123 /* 124 * Kernel module consumers must use this accessor macro. 125 */ 126 void kmod_udpstat_inc(int statnum); 127 #define KMOD_UDPSTAT_INC(name) \ 128 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 129 #endif 130 131 /* 132 * Identifiers for UDP sysctl nodes. 133 */ 134 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 135 #define UDPCTL_STATS 2 /* statistics (read-only) */ 136 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 137 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 138 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 139 140 #ifdef _KERNEL 141 #include <netinet/in_pcb.h> 142 SYSCTL_DECL(_net_inet_udp); 143 144 VNET_DECLARE(struct inpcbinfo, udbinfo); 145 VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 146 #define V_udbinfo VNET(udbinfo) 147 #define V_ulitecbinfo VNET(ulitecbinfo) 148 149 extern u_long udp_sendspace; 150 extern u_long udp_recvspace; 151 VNET_DECLARE(int, udp_cksum); 152 VNET_DECLARE(int, udp_blackhole); 153 VNET_DECLARE(bool, udp_blackhole_local); 154 VNET_DECLARE(int, udp_log_in_vain); 155 #define V_udp_cksum VNET(udp_cksum) 156 #define V_udp_blackhole VNET(udp_blackhole) 157 #define V_udp_blackhole_local VNET(udp_blackhole_local) 158 #define V_udp_log_in_vain VNET(udp_log_in_vain) 159 160 VNET_DECLARE(int, zero_checksum_port); 161 #define V_zero_checksum_port VNET(zero_checksum_port) 162 163 static __inline struct inpcbinfo * 164 udp_get_inpcbinfo(int protocol) 165 { 166 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 167 } 168 169 int udp_newudpcb(struct inpcb *); 170 void udp_discardcb(struct udpcb *); 171 172 int udp_ctloutput(struct socket *, struct sockopt *); 173 void udplite_input(struct mbuf *, int); 174 struct inpcb *udp_notify(struct inpcb *inp, int errno); 175 int udp_shutdown(struct socket *so); 176 177 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 178 udp_tun_icmp_t i, void *ctx); 179 180 #endif /* _KERNEL */ 181 182 #endif /* _NETINET_UDP_VAR_H_ */ 183