1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)udp.h 8.1 (Berkeley) 6/10/93 34 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp 35 */ 36 37 #ifndef _UDP_H_ 38 #define _UDP_H_ 39 40 #include "helper.h" 41 42 #define UDP_TTL 0x60 43 #define UDP_UDPDATALEN 16192 44 45 extern struct socket *udp_last_so; 46 47 /* 48 * Udp protocol header. 49 * Per RFC 768, September, 1981. 50 */ 51 struct udphdr { 52 port_t uh_sport; /* source port */ 53 port_t uh_dport; /* destination port */ 54 int16_t uh_ulen; /* udp length */ 55 u_int16_t uh_sum; /* udp checksum */ 56 }; 57 58 /* 59 * UDP kernel structures and variables. 60 */ 61 struct udpiphdr { 62 struct ipovly ui_i; /* overlaid ip structure */ 63 struct udphdr ui_u; /* udp header */ 64 }; 65 #define ui_mbuf ui_i.ih_mbuf.mptr 66 #define ui_x1 ui_i.ih_x1 67 #define ui_pr ui_i.ih_pr 68 #define ui_len ui_i.ih_len 69 #define ui_src ui_i.ih_src 70 #define ui_dst ui_i.ih_dst 71 #define ui_sport ui_u.uh_sport 72 #define ui_dport ui_u.uh_dport 73 #define ui_ulen ui_u.uh_ulen 74 #define ui_sum ui_u.uh_sum 75 76 struct udpstat { 77 /* input statistics: */ 78 u_long udps_ipackets; /* total input packets */ 79 u_long udps_hdrops; /* packet shorter than header */ 80 u_long udps_badsum; /* checksum error */ 81 u_long udps_badlen; /* data length larger than packet */ 82 u_long udps_noport; /* no socket on port */ 83 u_long udps_noportbcast; /* of above, arrived as broadcast */ 84 u_long udps_fullsock; /* not delivered, input socket full */ 85 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 86 /* output statistics: */ 87 u_long udps_opackets; /* total output packets */ 88 }; 89 90 /* 91 * Names for UDP sysctl objects 92 */ 93 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 94 #define UDPCTL_MAXID 2 95 96 extern struct udpstat udpstat; 97 extern struct socket udb; 98 struct mbuf; 99 100 void udp_init _P((void)); 101 void udp_input _P((register MBuf , int)); 102 int udp_attach _P((struct socket *)); 103 void udp_detach _P((struct socket *)); 104 u_int8_t udp_tos _P((struct socket *)); 105 void udp_emu _P((struct socket *, MBuf )); 106 struct socket * udp_listen _P((u_int, u_int32_t, u_int, int)); 107 int udp_unlisten _P((u_int)); 108 109 int udp_output_(struct socket *, MBuf, SockAddress*); 110 111 int udp_output2_(struct socket* so, MBuf m, 112 const SockAddress* saddr, const SockAddress* daddr, 113 int iptos); 114 115 #endif 116