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 union { 68 struct icmp *icmp; 69 struct ip6ctlparam *ip6cp; 70 } udp_tun_icmp_param_t __attribute__((__transparent_union__)); 71 typedef void udp_tun_icmp_t(udp_tun_icmp_param_t); 72 73 /* 74 * UDP control block; one per udp. 75 */ 76 struct udpcb { 77 udp_tun_func_t *u_tun_func; /* UDP kernel tunneling callback. */ 78 udp_tun_icmp_t *u_icmp_func; /* UDP kernel tunneling icmp callback */ 79 u_int u_flags; /* Generic UDP flags. */ 80 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 81 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 82 void *u_tun_ctx; /* Tunneling callback context. */ 83 }; 84 85 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 86 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 87 #endif 88 89 /* IPsec: ESP in UDP tunneling: */ 90 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 91 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 92 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 93 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 94 95 struct udpstat { 96 /* input statistics: */ 97 uint64_t udps_ipackets; /* total input packets */ 98 uint64_t udps_hdrops; /* packet shorter than header */ 99 uint64_t udps_badsum; /* checksum error */ 100 uint64_t udps_nosum; /* no checksum */ 101 uint64_t udps_badlen; /* data length larger than packet */ 102 uint64_t udps_noport; /* no socket on port */ 103 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 104 uint64_t udps_fullsock; /* not delivered, input socket full */ 105 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 106 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 107 /* output statistics: */ 108 uint64_t udps_opackets; /* total output packets */ 109 uint64_t udps_fastout; /* output packets on fast path */ 110 /* of no socket on port, arrived as multicast */ 111 uint64_t udps_noportmcast; 112 uint64_t udps_filtermcast; /* blocked by multicast filter */ 113 }; 114 115 #ifdef _KERNEL 116 #include <sys/counter.h> 117 118 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 119 /* 120 * In-kernel consumers can use these accessor macros directly to update 121 * stats. 122 */ 123 #define UDPSTAT_ADD(name, val) \ 124 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 125 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 126 127 /* 128 * Kernel module consumers must use this accessor macro. 129 */ 130 void kmod_udpstat_inc(int statnum); 131 #define KMOD_UDPSTAT_INC(name) \ 132 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 133 #endif 134 135 /* 136 * Identifiers for UDP sysctl nodes. 137 */ 138 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 139 #define UDPCTL_STATS 2 /* statistics (read-only) */ 140 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 141 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 142 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 143 144 #ifdef _KERNEL 145 #include <netinet/in_pcb.h> 146 SYSCTL_DECL(_net_inet_udp); 147 148 VNET_DECLARE(struct inpcbinfo, udbinfo); 149 VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 150 #define V_udbinfo VNET(udbinfo) 151 #define V_ulitecbinfo VNET(ulitecbinfo) 152 153 extern u_long udp_sendspace; 154 extern u_long udp_recvspace; 155 VNET_DECLARE(int, udp_cksum); 156 VNET_DECLARE(int, udp_blackhole); 157 VNET_DECLARE(bool, udp_blackhole_local); 158 VNET_DECLARE(int, udp_log_in_vain); 159 #define V_udp_cksum VNET(udp_cksum) 160 #define V_udp_blackhole VNET(udp_blackhole) 161 #define V_udp_blackhole_local VNET(udp_blackhole_local) 162 #define V_udp_log_in_vain VNET(udp_log_in_vain) 163 164 VNET_DECLARE(int, zero_checksum_port); 165 #define V_zero_checksum_port VNET(zero_checksum_port) 166 167 static __inline struct inpcbinfo * 168 udp_get_inpcbinfo(int protocol) 169 { 170 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 171 } 172 173 int udp_newudpcb(struct inpcb *); 174 void udp_discardcb(struct udpcb *); 175 176 int udp_ctloutput(struct socket *, struct sockopt *); 177 void udplite_input(struct mbuf *, int); 178 struct inpcb *udp_notify(struct inpcb *inp, int errno); 179 int udp_shutdown(struct socket *so); 180 181 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 182 udp_tun_icmp_t i, void *ctx); 183 184 #endif /* _KERNEL */ 185 186 #endif /* _NETINET_UDP_VAR_H_ */ 187