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 typedef void(*udp_tun_func_t)(struct mbuf *, int off, struct inpcb *); 55 56 /* 57 * UDP control block; one per udp. 58 */ 59 struct udpcb { 60 udp_tun_func_t u_tun_func; /* UDP kernel tunneling callback. */ 61 u_int u_flags; /* Generic UDP flags. */ 62 }; 63 64 #define intoudpcb(ip) ((struct udpcb *)(ip)->inp_ppcb) 65 #define sotoudpcb(so) (intoudpcb(sotoinpcb(so))) 66 67 struct udpstat { 68 /* input statistics: */ 69 u_long udps_ipackets; /* total input packets */ 70 u_long udps_hdrops; /* packet shorter than header */ 71 u_long udps_badsum; /* checksum error */ 72 u_long udps_nosum; /* no checksum */ 73 u_long udps_badlen; /* data length larger than packet */ 74 u_long udps_noport; /* no socket on port */ 75 u_long udps_noportbcast; /* of above, arrived as broadcast */ 76 u_long udps_fullsock; /* not delivered, input socket full */ 77 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 78 u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */ 79 /* output statistics: */ 80 u_long udps_opackets; /* total output packets */ 81 u_long udps_fastout; /* output packets on fast path */ 82 /* of no socket on port, arrived as multicast */ 83 u_long udps_noportmcast; 84 u_long udps_filtermcast; /* blocked by multicast filter */ 85 }; 86 87 #ifdef _KERNEL 88 #define UDPSTAT_ADD(name, val) V_udpstat.name += (val) 89 #define UDPSTAT_INC(name) UDPSTAT_ADD(name, 1) 90 #endif 91 92 /* 93 * Names for UDP sysctl objects. 94 */ 95 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 96 #define UDPCTL_STATS 2 /* statistics (read-only) */ 97 #define UDPCTL_MAXDGRAM 3 /* max datagram size */ 98 #define UDPCTL_RECVSPACE 4 /* default receive buffer space */ 99 #define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */ 100 #define UDPCTL_MAXID 6 101 102 #define UDPCTL_NAMES { \ 103 { 0, 0 }, \ 104 { "checksum", CTLTYPE_INT }, \ 105 { "stats", CTLTYPE_STRUCT }, \ 106 { "maxdgram", CTLTYPE_INT }, \ 107 { "recvspace", CTLTYPE_INT }, \ 108 { "pcblist", CTLTYPE_STRUCT }, \ 109 } 110 111 #ifdef _KERNEL 112 SYSCTL_DECL(_net_inet_udp); 113 114 extern struct pr_usrreqs udp_usrreqs; 115 116 #ifdef VIMAGE_GLOBALS 117 extern struct inpcbhead udb; 118 extern struct inpcbinfo udbinfo; 119 extern struct udpstat udpstat; 120 extern int udp_blackhole; 121 #endif 122 extern u_long udp_sendspace; 123 extern u_long udp_recvspace; 124 extern int udp_log_in_vain; 125 126 int udp_newudpcb(struct inpcb *); 127 void udp_discardcb(struct udpcb *); 128 129 void udp_ctlinput(int, struct sockaddr *, void *); 130 void udp_init(void); 131 void udp_input(struct mbuf *, int); 132 struct inpcb *udp_notify(struct inpcb *inp, int errno); 133 int udp_shutdown(struct socket *so); 134 135 int udp_set_kernel_tunneling(struct socket *so, udp_tun_func_t f); 136 #endif 137 138 #endif 139