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 <netinet/ip_var.h> 40 #include <netinet/udp.h> 41 42 /* 43 * UDP kernel structures and variables. 44 */ 45 struct udpiphdr { 46 struct ipovly ui_i; /* overlaid ip structure */ 47 struct udphdr ui_u; /* udp header */ 48 }; 49 #define ui_x1 ui_i.ih_x1 50 #define ui_v ui_i.ih_x1[0] 51 #define ui_pr ui_i.ih_pr 52 #define ui_len ui_i.ih_len 53 #define ui_src ui_i.ih_src 54 #define ui_dst ui_i.ih_dst 55 #define ui_sport ui_u.uh_sport 56 #define ui_dport ui_u.uh_dport 57 #define ui_ulen ui_u.uh_ulen 58 #define ui_sum ui_u.uh_sum 59 60 struct inpcb; 61 struct mbuf; 62 63 typedef void(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *, 64 const struct sockaddr *, void *); 65 typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *); 66 67 /* 68 * UDP control block; one per udp. 69 */ 70 struct udpcb { 71 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 72 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */ 73 u_int u_flags; /* Generic UDP flags. */ 74 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 75 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 76 void *u_tun_ctx; /* Tunneling callback context. */ 77 }; 78 79 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 80 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 81 82 /* IPsec: ESP in UDP tunneling: */ 83 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 84 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 85 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 86 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 87 88 struct udpstat { 89 /* input statistics: */ 90 uint64_t udps_ipackets; /* total input packets */ 91 uint64_t udps_hdrops; /* packet shorter than header */ 92 uint64_t udps_badsum; /* checksum error */ 93 uint64_t udps_nosum; /* no checksum */ 94 uint64_t udps_badlen; /* data length larger than packet */ 95 uint64_t udps_noport; /* no socket on port */ 96 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 97 uint64_t udps_fullsock; /* not delivered, input socket full */ 98 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 99 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 100 /* output statistics: */ 101 uint64_t udps_opackets; /* total output packets */ 102 uint64_t udps_fastout; /* output packets on fast path */ 103 /* of no socket on port, arrived as multicast */ 104 uint64_t udps_noportmcast; 105 uint64_t udps_filtermcast; /* blocked by multicast filter */ 106 }; 107 108 #ifdef _KERNEL 109 #include <sys/counter.h> 110 111 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 112 /* 113 * In-kernel consumers can use these accessor macros directly to update 114 * stats. 115 */ 116 #define UDPSTAT_ADD(name, val) \ 117 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 118 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 119 120 /* 121 * Kernel module consumers must use this accessor macro. 122 */ 123 void kmod_udpstat_inc(int statnum); 124 #define KMOD_UDPSTAT_INC(name) \ 125 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 126 #endif 127 128 /* 129 * Identifiers for UDP sysctl nodes. 130 */ 131 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 132 #define UDPCTL_STATS 2 /* statistics (read-only) */ 133 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 134 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 135 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 136 137 #ifdef _KERNEL 138 #include <netinet/in_pcb.h> 139 SYSCTL_DECL(_net_inet_udp); 140 141 extern struct pr_usrreqs udp_usrreqs; 142 VNET_DECLARE(struct inpcbinfo, udbinfo); 143 VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 144 #define V_udbinfo VNET(udbinfo) 145 #define V_ulitecbinfo VNET(ulitecbinfo) 146 147 extern u_long udp_sendspace; 148 extern u_long udp_recvspace; 149 VNET_DECLARE(int, udp_cksum); 150 VNET_DECLARE(int, udp_blackhole); 151 VNET_DECLARE(bool, udp_blackhole_local); 152 VNET_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_blackhole_local VNET(udp_blackhole_local) 156 #define V_udp_log_in_vain VNET(udp_log_in_vain) 157 158 VNET_DECLARE(int, zero_checksum_port); 159 #define V_zero_checksum_port VNET(zero_checksum_port) 160 161 static __inline struct inpcbinfo * 162 udp_get_inpcbinfo(int protocol) 163 { 164 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 165 } 166 167 int udp_newudpcb(struct inpcb *); 168 void udp_discardcb(struct udpcb *); 169 170 void udp_ctlinput(int, struct sockaddr *, void *); 171 void udplite_ctlinput(int, struct sockaddr *, void *); 172 int udp_ctloutput(struct socket *, struct sockopt *); 173 int udp_input(struct mbuf **, int *, int); 174 void udplite_input(struct mbuf *, int); 175 struct inpcb *udp_notify(struct inpcb *inp, int errno); 176 int udp_shutdown(struct socket *so); 177 178 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 179 udp_tun_icmp_t i, void *ctx); 180 181 #endif /* _KERNEL */ 182 183 #endif /* _NETINET_UDP_VAR_H_ */ 184