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 */ 34 35 #ifndef _NETINET_UDP_VAR_H_ 36 #define _NETINET_UDP_VAR_H_ 37 38 #include <sys/types.h> 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 /* 61 * Identifiers for UDP sysctl nodes. 62 */ 63 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 64 #define UDPCTL_STATS 2 /* statistics (read-only) */ 65 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 66 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 67 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 68 69 /* IPsec: ESP in UDP tunneling: */ 70 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 71 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 72 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 73 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 74 75 struct udpstat { 76 /* input statistics: */ 77 uint64_t udps_ipackets; /* total input packets */ 78 uint64_t udps_hdrops; /* packet shorter than header */ 79 uint64_t udps_badsum; /* checksum error */ 80 uint64_t udps_nosum; /* no checksum */ 81 uint64_t udps_badlen; /* data length larger than packet */ 82 uint64_t udps_noport; /* no socket on port */ 83 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 84 uint64_t udps_fullsock; /* not delivered, input socket full */ 85 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 86 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 87 /* output statistics: */ 88 uint64_t udps_opackets; /* total output packets */ 89 uint64_t udps_fastout; /* output packets on fast path */ 90 /* of no socket on port, arrived as multicast */ 91 uint64_t udps_noportmcast; 92 uint64_t udps_filtermcast; /* blocked by multicast filter */ 93 }; 94 95 #ifdef _KERNEL 96 #include <netinet/in_pcb.h> 97 #include <sys/counter.h> 98 struct mbuf; 99 100 typedef bool udp_tun_func_t(struct mbuf *, int, struct inpcb *, 101 const struct sockaddr *, void *); 102 typedef union { 103 struct icmp *icmp; 104 struct ip6ctlparam *ip6cp; 105 } udp_tun_icmp_param_t __attribute__((__transparent_union__)); 106 typedef void udp_tun_icmp_t(udp_tun_icmp_param_t); 107 108 /* 109 * UDP control block; one per udp. 110 */ 111 struct udpcb { 112 struct inpcb u_inpcb; 113 #define u_start_zero u_tun_func 114 #define u_zero_size (sizeof(struct udpcb) - \ 115 offsetof(struct udpcb, u_start_zero)) 116 udp_tun_func_t *u_tun_func; /* UDP kernel tunneling callback. */ 117 udp_tun_icmp_t *u_icmp_func; /* UDP kernel tunneling icmp callback */ 118 u_int u_flags; /* Generic UDP flags. */ 119 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 120 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 121 void *u_tun_ctx; /* Tunneling callback context. */ 122 }; 123 124 #define intoudpcb(ip) __containerof((inp), struct udpcb, u_inpcb) 125 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 126 127 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 128 /* 129 * In-kernel consumers can use these accessor macros directly to update 130 * stats. 131 */ 132 #define UDPSTAT_ADD(name, val) \ 133 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 134 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 135 136 /* 137 * Kernel module consumers must use this accessor macro. 138 */ 139 void kmod_udpstat_inc(int statnum); 140 #define KMOD_UDPSTAT_INC(name) \ 141 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 142 143 SYSCTL_DECL(_net_inet_udp); 144 145 VNET_DECLARE(struct inpcbinfo, udbinfo); 146 VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 147 #define V_udbinfo VNET(udbinfo) 148 #define V_ulitecbinfo VNET(ulitecbinfo) 149 150 extern u_long udp_sendspace; 151 extern u_long udp_recvspace; 152 VNET_DECLARE(int, udp_cksum); 153 VNET_DECLARE(int, udp_blackhole); 154 VNET_DECLARE(bool, udp_blackhole_local); 155 VNET_DECLARE(int, udp_log_in_vain); 156 #define V_udp_cksum VNET(udp_cksum) 157 #define V_udp_blackhole VNET(udp_blackhole) 158 #define V_udp_blackhole_local VNET(udp_blackhole_local) 159 #define V_udp_log_in_vain VNET(udp_log_in_vain) 160 161 VNET_DECLARE(int, zero_checksum_port); 162 #define V_zero_checksum_port VNET(zero_checksum_port) 163 164 static __inline struct inpcbinfo * 165 udp_get_inpcbinfo(int protocol) 166 { 167 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 168 } 169 170 int udp_ctloutput(struct socket *, struct sockopt *); 171 void udplite_input(struct mbuf *, int); 172 struct inpcb *udp_notify(struct inpcb *inp, int errno); 173 int udp_shutdown(struct socket *so); 174 175 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 176 udp_tun_icmp_t i, void *ctx); 177 178 #ifdef _SYS_PROTOSW_H_ 179 pr_abort_t udp_abort; 180 pr_disconnect_t udp_disconnect; 181 pr_send_t udp_send; 182 #endif 183 184 #endif /* _KERNEL */ 185 186 #endif /* _NETINET_UDP_VAR_H_ */ 187