00001 /* 00002 * Copyright (c) 1982, 1986, 1993 00003 * The Regents of the University of California. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the University nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * @(#)udp.h 8.1 (Berkeley) 6/10/93 00030 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp 00031 */ 00032 00033 #ifndef _UDP_H_ 00034 #define _UDP_H_ 00035 00036 #define UDP_TTL 0x60 00037 #define UDP_UDPDATALEN 16192 00038 00039 extern struct socket *udp_last_so; 00040 00041 /* 00042 * Udp protocol header. 00043 * Per RFC 768, September, 1981. 00044 */ 00045 struct udphdr { 00046 u_int16_t uh_sport; /* source port */ 00047 u_int16_t uh_dport; /* destination port */ 00048 int16_t uh_ulen; /* udp length */ 00049 u_int16_t uh_sum; /* udp checksum */ 00050 }; 00051 00052 /* 00053 * UDP kernel structures and variables. 00054 */ 00055 struct udpiphdr { 00056 struct ipovly ui_i; /* overlaid ip structure */ 00057 struct udphdr ui_u; /* udp header */ 00058 }; 00059 #define ui_mbuf ui_i.ih_mbuf.mptr 00060 #define ui_x1 ui_i.ih_x1 00061 #define ui_pr ui_i.ih_pr 00062 #define ui_len ui_i.ih_len 00063 #define ui_src ui_i.ih_src 00064 #define ui_dst ui_i.ih_dst 00065 #define ui_sport ui_u.uh_sport 00066 #define ui_dport ui_u.uh_dport 00067 #define ui_ulen ui_u.uh_ulen 00068 #define ui_sum ui_u.uh_sum 00069 00070 #ifdef LOG_ENABLED 00071 struct udpstat { 00072 /* input statistics: */ 00073 u_long udps_ipackets; /* total input packets */ 00074 u_long udps_hdrops; /* packet shorter than header */ 00075 u_long udps_badsum; /* checksum error */ 00076 u_long udps_badlen; /* data length larger than packet */ 00077 u_long udps_noport; /* no socket on port */ 00078 u_long udps_noportbcast; /* of above, arrived as broadcast */ 00079 u_long udps_fullsock; /* not delivered, input socket full */ 00080 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ 00081 /* output statistics: */ 00082 u_long udps_opackets; /* total output packets */ 00083 }; 00084 #endif 00085 00086 /* 00087 * Names for UDP sysctl objects 00088 */ 00089 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ 00090 #define UDPCTL_MAXID 2 00091 00092 #ifdef LOG_ENABLED 00093 extern struct udpstat udpstat; 00094 #endif 00095 00096 extern struct socket udb; 00097 struct mbuf; 00098 00099 void udp_init _P((void)); 00100 void udp_input _P((register struct mbuf *, int)); 00101 int udp_output _P((struct socket *, struct mbuf *, struct sockaddr_in *)); 00102 int udp_attach _P((struct socket *)); 00103 void udp_detach _P((struct socket *)); 00104 struct socket * udp_listen _P((u_int, u_int32_t, u_int, int)); 00105 int udp_output2(struct socket *so, struct mbuf *m, 00106 struct sockaddr_in *saddr, struct sockaddr_in *daddr, 00107 int iptos); 00108 #endif