1 /*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 31 * $FreeBSD$ 32 */ 33 34 #ifndef _NETINET_UDP_VAR_H_ 35 #define _NETINET_UDP_VAR_H_ 36 37 /* 38 * UDP kernel structures and variables. 39 */ 40 struct udpiphdr { 41 struct ipovly ui_i; /* overlaid ip structure */ 42 struct udphdr ui_u; /* udp header */ 43 }; 44 #define ui_x1 ui_i.ih_x1 45 #define ui_v ui_i.ih_x1[0] 46 #define ui_pr ui_i.ih_pr 47 #define ui_len ui_i.ih_len 48 #define ui_src ui_i.ih_src 49 #define ui_dst ui_i.ih_dst 50 #define ui_sport ui_u.uh_sport 51 #define ui_dport ui_u.uh_dport 52 #define ui_ulen ui_u.uh_ulen 53 #define ui_sum ui_u.uh_sum 54 55 struct inpcb; 56 struct mbuf; 57 58 typedef void(*udp_tun_func_t)(struct mbuf *, int, struct inpcb *, 59 const struct sockaddr *, void *); 60 typedef void(*udp_tun_icmp_t)(int, struct sockaddr *, void *, void *); 61 62 /* 63 * UDP control block; one per udp. 64 */ 65 struct udpcb { 66 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 67 udp_tun_icmp_t u_icmp_func; /* UDP kernel tunneling icmp callback */ 68 u_int u_flags; /* Generic UDP flags. */ 69 uint16_t u_rxcslen; /* Coverage for incoming datagrams. */ 70 uint16_t u_txcslen; /* Coverage for outgoing datagrams. */ 71 void *u_tun_ctx; /* Tunneling callback context. */ 72 }; 73 74 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 75 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 76 77 /* IPsec: ESP in UDP tunneling: */ 78 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 79 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 80 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 81 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 82 83 struct udpstat { 84 /* input statistics: */ 85 uint64_t udps_ipackets; /* total input packets */ 86 uint64_t udps_hdrops; /* packet shorter than header */ 87 uint64_t udps_badsum; /* checksum error */ 88 uint64_t udps_nosum; /* no checksum */ 89 uint64_t udps_badlen; /* data length larger than packet */ 90 uint64_t udps_noport; /* no socket on port */ 91 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 92 uint64_t udps_fullsock; /* not delivered, input socket full */ 93 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 94 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 95 /* output statistics: */ 96 uint64_t udps_opackets; /* total output packets */ 97 uint64_t udps_fastout; /* output packets on fast path */ 98 /* of no socket on port, arrived as multicast */ 99 uint64_t udps_noportmcast; 100 uint64_t udps_filtermcast; /* blocked by multicast filter */ 101 }; 102 103 #ifdef _KERNEL 104 #include <sys/counter.h> 105 106 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 107 /* 108 * In-kernel consumers can use these accessor macros directly to update 109 * stats. 110 */ 111 #define UDPSTAT_ADD(name, val) \ 112 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 113 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 114 115 /* 116 * Kernel module consumers must use this accessor macro. 117 */ 118 void kmod_udpstat_inc(int statnum); 119 #define KMOD_UDPSTAT_INC(name) \ 120 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 121 #endif 122 123 /* 124 * Identifiers for UDP sysctl nodes. 125 */ 126 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 127 #define UDPCTL_STATS 2 /* statistics (read-only) */ 128 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 129 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 130 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 131 132 #ifdef _KERNEL 133 #include <netinet/in_pcb.h> 134 SYSCTL_DECL(_net_inet_udp); 135 136 extern struct pr_usrreqs udp_usrreqs; 137 VNET_DECLARE(struct inpcbhead, udb); 138 VNET_DECLARE(struct inpcbinfo, udbinfo); 139 VNET_DECLARE(struct inpcbhead, ulitecb); 140 VNET_DECLARE(struct inpcbinfo, ulitecbinfo); 141 #define V_udb VNET(udb) 142 #define V_udbinfo VNET(udbinfo) 143 #define V_ulitecb VNET(ulitecb) 144 #define V_ulitecbinfo VNET(ulitecbinfo) 145 146 extern u_long udp_sendspace; 147 extern u_long udp_recvspace; 148 VNET_DECLARE(int, udp_cksum); 149 VNET_DECLARE(int, udp_blackhole); 150 #define V_udp_cksum VNET(udp_cksum) 151 #define V_udp_blackhole VNET(udp_blackhole) 152 extern int udp_log_in_vain; 153 154 static __inline struct inpcbinfo * 155 udp_get_inpcbinfo(int protocol) 156 { 157 return (protocol == IPPROTO_UDP) ? &V_udbinfo : &V_ulitecbinfo; 158 } 159 160 static __inline struct inpcbhead * 161 udp_get_pcblist(int protocol) 162 { 163 return (protocol == IPPROTO_UDP) ? &V_udb : &V_ulitecb; 164 } 165 166 int udp_newudpcb(struct inpcb *); 167 void udp_discardcb(struct udpcb *); 168 169 void udp_ctlinput(int, struct sockaddr *, void *); 170 void udplite_ctlinput(int, struct sockaddr *, void *); 171 int udp_ctloutput(struct socket *, struct sockopt *); 172 void udp_init(void); 173 void udplite_init(void); 174 int udp_input(struct mbuf **, int *, int); 175 void udplite_input(struct mbuf *, int); 176 struct inpcb *udp_notify(struct inpcb *inp, int errno); 177 int udp_shutdown(struct socket *so); 178 179 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f, 180 udp_tun_icmp_t i, void *ctx); 181 182 #endif /* _KERNEL */ 183 184 #endif /* _NETINET_UDP_VAR_H_ */ 185