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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)udp.h 8.1 (Berkeley) 6/10/93 30 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp 31 */ 32 33 #ifndef _UDP_H_ 34 #define _UDP_H_ 35 36 #define UDP_TTL 0x60 37 #define UDP_UDPDATALEN 16192 38 39 extern struct socket *udp_last_so; 40 41 /* 42 * Udp protocol header. 43 * Per RFC 768, September, 1981. 44 */ 45 struct udphdr { 46 u_int16_t uh_sport; /* source port */ 47 u_int16_t uh_dport; /* destination port */ 48 int16_t uh_ulen; /* udp length */ 49 u_int16_t uh_sum; /* udp checksum */ 50 }; 51 52 /* 53 * UDP kernel structures and variables. 54 */ 55 struct udpiphdr { 56 struct ipovly ui_i; /* overlaid ip structure */ 57 struct udphdr ui_u; /* udp header */ 58 }; 59 #define ui_mbuf ui_i.ih_mbuf.mptr 60 #define ui_x1 ui_i.ih_x1 61 #define ui_pr ui_i.ih_pr 62 #define ui_len ui_i.ih_len 63 #define ui_src ui_i.ih_src 64 #define ui_dst ui_i.ih_dst 65 #define ui_sport ui_u.uh_sport 66 #define ui_dport ui_u.uh_dport 67 #define ui_ulen ui_u.uh_ulen 68 #define ui_sum ui_u.uh_sum 69 70 #ifdef LOG_ENABLED 71 struct udpstat { 72 /* input statistics: */ 73 u_long udps_ipackets; /* total input packets */ 74 u_long udps_hdrops; /* packet shorter than header */ 75 u_long udps_badsum; /* checksum error */ 76 u_long udps_badlen; /* data length larger than packet */ 77 u_long udps_noport; /* no socket on port */ 78 u_long udps_noportbcast; /* of above, arrived as broadcast */ 79 u_long udps_fullsock; /* not delivered, input socket full */ 80 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 81 /* output statistics: */ 82 u_long udps_opackets; /* total output packets */ 83 }; 84 #endif 85 86 /* 87 * Names for UDP sysctl objects 88 */ 89 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 90 #define UDPCTL_MAXID 2 91 92 #ifdef LOG_ENABLED 93 extern struct udpstat udpstat; 94 #endif 95 96 extern struct socket udb; 97 struct mbuf; 98 99 void udp_init _P((void)); 100 void udp_input _P((register struct mbuf *, int)); 101 int udp_output _P((struct socket *, struct mbuf *, struct sockaddr_in *)); 102 int udp_attach _P((struct socket *)); 103 void udp_detach _P((struct socket *)); 104 struct socket * udp_listen _P((u_int, u_int32_t, u_int, int)); 105 int udp_output2(struct socket *so, struct mbuf *m, 106 struct sockaddr_in *saddr, struct sockaddr_in *daddr, 107 int iptos); 108 #endif 109