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1 /* |
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2 * Copyright (c) 1982, 1986, 1993 |
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3 * The Regents of the University of California. All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms, with or without |
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6 * modification, are permitted provided that the following conditions |
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7 * are met: |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * 2. Redistributions in binary form must reproduce the above copyright |
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11 * notice, this list of conditions and the following disclaimer in the |
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12 * documentation and/or other materials provided with the distribution. |
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13 * 3. All advertising materials mentioning features or use of this software |
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14 * must display the following acknowledgement: |
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15 * This product includes software developed by the University of |
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16 * California, Berkeley and its contributors. |
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17 * 4. Neither the name of the University nor the names of its contributors |
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18 * may be used to endorse or promote products derived from this software |
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19 * without specific prior written permission. |
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20 * |
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21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 * SUCH DAMAGE. |
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32 * |
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33 * @(#)udp.h 8.1 (Berkeley) 6/10/93 |
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34 * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp |
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35 */ |
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36 |
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37 #ifndef _UDP_H_ |
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38 #define _UDP_H_ |
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39 |
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40 #define UDP_TTL 0x60 |
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41 #define UDP_UDPDATALEN 16192 |
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42 |
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43 extern struct socket *udp_last_so; |
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44 |
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45 /* |
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46 * Udp protocol header. |
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47 * Per RFC 768, September, 1981. |
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48 */ |
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49 struct udphdr { |
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50 u_int16_t uh_sport; /* source port */ |
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51 u_int16_t uh_dport; /* destination port */ |
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52 int16_t uh_ulen; /* udp length */ |
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53 u_int16_t uh_sum; /* udp checksum */ |
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54 }; |
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55 |
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56 /* |
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57 * UDP kernel structures and variables. |
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58 */ |
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59 struct udpiphdr { |
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60 struct ipovly ui_i; /* overlaid ip structure */ |
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61 struct udphdr ui_u; /* udp header */ |
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62 }; |
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63 #define ui_next ui_i.ih_next |
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64 #define ui_prev ui_i.ih_prev |
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65 #define ui_x1 ui_i.ih_x1 |
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66 #define ui_pr ui_i.ih_pr |
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67 #define ui_len ui_i.ih_len |
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68 #define ui_src ui_i.ih_src |
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69 #define ui_dst ui_i.ih_dst |
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70 #define ui_sport ui_u.uh_sport |
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71 #define ui_dport ui_u.uh_dport |
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72 #define ui_ulen ui_u.uh_ulen |
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73 #define ui_sum ui_u.uh_sum |
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74 |
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75 #ifdef LOG_ENABLED |
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76 struct udpstat { |
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77 /* input statistics: */ |
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78 u_long udps_ipackets; /* total input packets */ |
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79 u_long udps_hdrops; /* packet shorter than header */ |
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80 u_long udps_badsum; /* checksum error */ |
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81 u_long udps_badlen; /* data length larger than packet */ |
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82 u_long udps_noport; /* no socket on port */ |
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83 u_long udps_noportbcast; /* of above, arrived as broadcast */ |
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84 u_long udps_fullsock; /* not delivered, input socket full */ |
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85 u_long udpps_pcbcachemiss; /* input packets missing pcb cache */ |
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86 /* output statistics: */ |
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87 u_long udps_opackets; /* total output packets */ |
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88 }; |
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89 #endif |
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90 |
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91 /* |
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92 * Names for UDP sysctl objects |
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93 */ |
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94 #define UDPCTL_CHECKSUM 1 /* checksum UDP packets */ |
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95 #define UDPCTL_MAXID 2 |
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96 |
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97 #ifdef LOG_ENABLED |
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98 extern struct udpstat udpstat; |
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99 #endif |
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100 |
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101 extern struct socket udb; |
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102 struct mbuf; |
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103 |
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104 void udp_init _P((void)); |
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105 void udp_input _P((register struct mbuf *, int)); |
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106 int udp_output _P((struct socket *, struct mbuf *, struct sockaddr_in *)); |
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107 int udp_attach _P((struct socket *)); |
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108 void udp_detach _P((struct socket *)); |
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109 struct socket * udp_listen _P((u_int, u_int32_t, u_int, int)); |
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110 int udp_output2(struct socket *so, struct mbuf *m, |
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111 struct sockaddr_in *saddr, struct sockaddr_in *daddr, |
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112 int iptos); |
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113 #endif |