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 * 4. 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_pr ui_i.ih_pr 46 #define ui_len ui_i.ih_len 47 #define ui_src ui_i.ih_src 48 #define ui_dst ui_i.ih_dst 49 #define ui_sport ui_u.uh_sport 50 #define ui_dport ui_u.uh_dport 51 #define ui_ulen ui_u.uh_ulen 52 #define ui_sum ui_u.uh_sum 53 54 struct inpcb; 55 struct mbuf; 56 57 typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *); 58 59 /* 60 * UDP control block; one per udp. 61 */ 62 struct udpcb { 63 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 64 u_int u_flags; /* Generic UDP flags. */ 65 }; 66 67 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 68 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 69 70 /* IPsec: ESP in UDP tunneling: */ 71 #define UF_ESPINUDP_NON_IKE 0x00000001 /* w/ non-IKE marker .. */ 72 /* .. per draft-ietf-ipsec-nat-t-ike-0[01], 73 * and draft-ietf-ipsec-udp-encaps-(00/)01.txt */ 74 #define UF_ESPINUDP 0x00000002 /* w/ non-ESP marker. */ 75 76 struct udpstat { 77 /* input statistics: */ 78 uint64_t udps_ipackets; /* total input packets */ 79 uint64_t udps_hdrops; /* packet shorter than header */ 80 uint64_t udps_badsum; /* checksum error */ 81 uint64_t udps_nosum; /* no checksum */ 82 uint64_t udps_badlen; /* data length larger than packet */ 83 uint64_t udps_noport; /* no socket on port */ 84 uint64_t udps_noportbcast; /* of above, arrived as broadcast */ 85 uint64_t udps_fullsock; /* not delivered, input socket full */ 86 uint64_t udpps_pcbcachemiss; /* input packets missing pcb cache */ 87 uint64_t udpps_pcbhashmiss; /* input packets not for hashed pcb */ 88 /* output statistics: */ 89 uint64_t udps_opackets; /* total output packets */ 90 uint64_t udps_fastout; /* output packets on fast path */ 91 /* of no socket on port, arrived as multicast */ 92 uint64_t udps_noportmcast; 93 uint64_t udps_filtermcast; /* blocked by multicast filter */ 94 }; 95 96 #ifdef _KERNEL 97 #include <sys/counter.h> 98 99 VNET_PCPUSTAT_DECLARE(struct udpstat, udpstat); 100 /* 101 * In-kernel consumers can use these accessor macros directly to update 102 * stats. 103 */ 104 #define UDPSTAT_ADD(name, val) \ 105 VNET_PCPUSTAT_ADD(struct udpstat, udpstat, name, (val)) 106 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 107 108 /* 109 * Kernel module consumers must use this accessor macro. 110 */ 111 void kmod_udpstat_inc(int statnum); 112 #define KMOD_UDPSTAT_INC(name) \ 113 kmod_udpstat_inc(offsetof(struct udpstat, name) / sizeof(uint64_t)) 114 #endif 115 116 /* 117 * Names for UDP sysctl objects. 118 */ 119 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 120 #define UDPCTL_STATS 2 /* statistics (read-only) */ 121 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 122 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 123 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 124 #define UDPCTL_MAXID 6 125 126 #define UDPCTL_NAMES { \ 127 { 0, 0 }, \ 128 { "checksum", CTLTYPE_INT }, \ 129 { "stats", CTLTYPE_STRUCT }, \ 130 { "maxdgram", CTLTYPE_INT }, \ 131 { "recvspace", CTLTYPE_INT }, \ 132 { "pcblist", CTLTYPE_STRUCT }, \ 133 } 134 135 #ifdef _KERNEL 136 SYSCTL_DECL(_net_inet_udp); 137 138 extern struct pr_usrreqs udp_usrreqs; 139 VNET_DECLARE(struct inpcbhead, udb); 140 VNET_DECLARE(struct inpcbinfo, udbinfo); 141 #define V_udb VNET(udb) 142 #define V_udbinfo VNET(udbinfo) 143 144 extern u_long udp_sendspace; 145 extern u_long udp_recvspace; 146 VNET_DECLARE(int, udp_cksum); 147 VNET_DECLARE(int, udp_blackhole); 148 #define V_udp_cksum VNET(udp_cksum) 149 #define V_udp_blackhole VNET(udp_blackhole) 150 extern int udp_log_in_vain; 151 152 int udp_newudpcb(struct inpcb *); 153 void udp_discardcb(struct udpcb *); 154 155 void udp_ctlinput(int, struct sockaddr *, void *); 156 int udp_ctloutput(struct socket *, struct sockopt *); 157 void udp_init(void); 158 #ifdef VIMAGE 159 void udp_destroy(void); 160 #endif 161 void udp_input(struct mbuf *, int); 162 struct inpcb *udp_notify(struct inpcb *inp, int errno); 163 int udp_shutdown(struct socket *so); 164 165 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f); 166 #endif 167 168 #endif 169