1 | /* |
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2 | * Copyright (c) 1982, 1986, 1989, 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 | * @(#)if.h 8.1 (Berkeley) 6/10/93 |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NET_IF_H_ |
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38 | #define _NET_IF_H_ |
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39 | |
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40 | /* |
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41 | * Structures defining a network interface, providing a packet |
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42 | * transport mechanism (ala level 0 of the PUP protocols). |
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43 | * |
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44 | * Each interface accepts output datagrams of a specified maximum |
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45 | * length, and provides higher level routines with input datagrams |
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46 | * received from its medium. |
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47 | * |
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48 | * Output occurs when the routine if_output is called, with three parameters: |
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49 | * (*ifp->if_output)(ifp, m, dst, rt) |
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50 | * Here m is the mbuf chain to be sent and dst is the destination address. |
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51 | * The output routine encapsulates the supplied datagram if necessary, |
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52 | * and then transmits it on its medium. |
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53 | * |
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54 | * On input, each interface unwraps the data received by it, and either |
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55 | * places it on the input queue of a internetwork datagram routine |
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56 | * and posts the associated software interrupt, or passes the datagram to a raw |
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57 | * packet input routine. |
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58 | * |
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59 | * Routines exist for locating interfaces by their addresses |
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60 | * or for locating a interface on a certain network, as well as more general |
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61 | * routing and gateway routines maintaining information used to locate |
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62 | * interfaces. These routines live in the files if.c and route.c |
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63 | */ |
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64 | |
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65 | #ifndef _TIME_ /* XXX fast fix for SNMP, going away soon */ |
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66 | #include <sys/time.h> |
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67 | #endif |
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68 | |
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69 | #ifdef __STDC__ |
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70 | /* |
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71 | * Forward structure declarations for function prototypes [sic]. |
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72 | */ |
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73 | struct mbuf; |
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74 | struct proc; |
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75 | struct rtentry; |
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76 | struct socket; |
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77 | struct ether_header; |
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78 | #endif |
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79 | |
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80 | /* |
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81 | * Structure describing information about an interface |
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82 | * which may be of interest to management entities. |
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83 | */ |
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84 | struct if_data { |
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85 | /* generic interface information */ |
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86 | u_char ifi_type; /* ethernet, tokenring, etc */ |
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87 | u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */ |
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88 | u_char ifi_addrlen; /* media address length */ |
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89 | u_char ifi_hdrlen; /* media header length */ |
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90 | u_char ifi_recvquota; /* polling quota for receive intrs */ |
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91 | u_char ifi_xmitquota; /* polling quota for xmit intrs */ |
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92 | u_long ifi_mtu; /* maximum transmission unit */ |
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93 | u_long ifi_metric; /* routing metric (external only) */ |
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94 | u_long ifi_baudrate; /* linespeed */ |
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95 | /* volatile statistics */ |
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96 | u_long ifi_ipackets; /* packets received on interface */ |
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97 | u_long ifi_ierrors; /* input errors on interface */ |
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98 | u_long ifi_opackets; /* packets sent on interface */ |
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99 | u_long ifi_oerrors; /* output errors on interface */ |
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100 | u_long ifi_collisions; /* collisions on csma interfaces */ |
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101 | u_long ifi_ibytes; /* total number of octets received */ |
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102 | u_long ifi_obytes; /* total number of octets sent */ |
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103 | u_long ifi_imcasts; /* packets received via multicast */ |
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104 | u_long ifi_omcasts; /* packets sent via multicast */ |
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105 | u_long ifi_iqdrops; /* dropped on input, this interface */ |
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106 | u_long ifi_noproto; /* destined for unsupported protocol */ |
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107 | u_long ifi_recvtiming; /* usec spent receiving when timing */ |
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108 | u_long ifi_xmittiming; /* usec spent xmitting when timing */ |
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109 | struct timeval ifi_lastchange; /* time of last administrative change */ |
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110 | }; |
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111 | |
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112 | /* |
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113 | * Structure defining a queue for a network interface. |
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114 | */ |
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115 | struct ifqueue { |
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116 | struct mbuf *ifq_head; |
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117 | struct mbuf *ifq_tail; |
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118 | int ifq_len; |
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119 | int ifq_maxlen; |
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120 | int ifq_drops; |
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121 | }; |
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122 | |
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123 | /* |
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124 | * Structure defining a network interface. |
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125 | * |
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126 | * (Would like to call this struct ``if'', but C isn't PL/1.) |
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127 | */ |
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128 | struct ifnet { |
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129 | void *if_softc; /* pointer to driver state */ |
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130 | char *if_name; /* name, e.g. ``en'' or ``lo'' */ |
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131 | struct ifnet *if_next; /* all struct ifnets are chained */ |
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132 | struct ifaddr *if_addrlist; /* linked list of addresses per if */ |
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133 | int if_pcount; /* number of promiscuous listeners */ |
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134 | struct bpf_if *if_bpf; /* packet filter structure */ |
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135 | u_short if_index; /* numeric abbreviation for this if */ |
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136 | short if_unit; /* sub-unit for lower level driver */ |
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137 | short if_timer; /* time 'til if_watchdog called */ |
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138 | short if_flags; /* up/down, broadcast, etc. */ |
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139 | int if_ipending; /* interrupts pending */ |
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140 | void *if_linkmib; /* link-type-specific MIB data */ |
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141 | size_t if_linkmiblen; /* length of above data */ |
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142 | struct if_data if_data; |
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143 | /* procedure handles */ |
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144 | int (*if_output) /* output routine (enqueue) */ |
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145 | __P((struct ifnet *, struct mbuf *, struct sockaddr *, |
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146 | struct rtentry *)); |
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147 | void (*if_start) /* initiate output routine */ |
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148 | __P((struct ifnet *)); |
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149 | int (*if_done) /* output complete routine */ |
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150 | __P((struct ifnet *)); /* (XXX not used; fake prototype) */ |
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151 | int (*if_ioctl) /* ioctl routine */ |
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152 | __P((struct ifnet *, int, caddr_t)); |
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153 | void (*if_watchdog) /* timer routine */ |
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154 | __P((struct ifnet *)); |
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155 | int (*if_poll_recv) /* polled receive routine */ |
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156 | __P((struct ifnet *, int *)); |
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157 | int (*if_poll_xmit) /* polled transmit routine */ |
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158 | __P((struct ifnet *, int *)); |
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159 | void (*if_poll_intren) /* polled interrupt reenable routine */ |
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160 | __P((struct ifnet *)); |
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161 | void (*if_poll_slowinput) /* input routine for slow devices */ |
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162 | __P((struct ifnet *, struct mbuf *)); |
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163 | void (*if_init) /* Init routine */ |
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164 | __P((void *)); |
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165 | int (*if_tap) /* Packet filter routine */ |
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166 | (struct ifnet *, struct ether_header *, struct mbuf *); |
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167 | struct ifqueue if_snd; /* output queue */ |
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168 | struct ifqueue *if_poll_slowq; /* input queue for slow devices */ |
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169 | }; |
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170 | typedef void if_init_f_t __P((void *)); |
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171 | |
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172 | #define if_mtu if_data.ifi_mtu |
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173 | #define if_type if_data.ifi_type |
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174 | #define if_physical if_data.ifi_physical |
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175 | #define if_addrlen if_data.ifi_addrlen |
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176 | #define if_hdrlen if_data.ifi_hdrlen |
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177 | #define if_metric if_data.ifi_metric |
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178 | #define if_baudrate if_data.ifi_baudrate |
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179 | #define if_ipackets if_data.ifi_ipackets |
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180 | #define if_ierrors if_data.ifi_ierrors |
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181 | #define if_opackets if_data.ifi_opackets |
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182 | #define if_oerrors if_data.ifi_oerrors |
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183 | #define if_collisions if_data.ifi_collisions |
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184 | #define if_ibytes if_data.ifi_ibytes |
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185 | #define if_obytes if_data.ifi_obytes |
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186 | #define if_imcasts if_data.ifi_imcasts |
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187 | #define if_omcasts if_data.ifi_omcasts |
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188 | #define if_iqdrops if_data.ifi_iqdrops |
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189 | #define if_noproto if_data.ifi_noproto |
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190 | #define if_lastchange if_data.ifi_lastchange |
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191 | #define if_recvquota if_data.ifi_recvquota |
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192 | #define if_xmitquota if_data.ifi_xmitquota |
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193 | #define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0) |
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194 | |
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195 | #define IFF_UP 0x1 /* interface is up */ |
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196 | #define IFF_BROADCAST 0x2 /* broadcast address valid */ |
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197 | #define IFF_DEBUG 0x4 /* turn on debugging */ |
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198 | #define IFF_LOOPBACK 0x8 /* is a loopback net */ |
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199 | #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ |
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200 | /*#define IFF_NOTRAILERS 0x20 * obsolete: avoid use of trailers */ |
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201 | #define IFF_RUNNING 0x40 /* resources allocated */ |
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202 | #define IFF_NOARP 0x80 /* no address resolution protocol */ |
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203 | #define IFF_PROMISC 0x100 /* receive all packets */ |
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204 | #define IFF_ALLMULTI 0x200 /* receive all multicast packets */ |
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205 | #define IFF_OACTIVE 0x400 /* transmission in progress */ |
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206 | #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */ |
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207 | #define IFF_LINK0 0x1000 /* per link layer defined bit */ |
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208 | #define IFF_LINK1 0x2000 /* per link layer defined bit */ |
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209 | #define IFF_LINK2 0x4000 /* per link layer defined bit */ |
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210 | #define IFF_ALTPHYS IFF_LINK2 /* use alternate physical connection */ |
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211 | #define IFF_MULTICAST 0x8000 /* supports multicast */ |
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212 | |
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213 | /* flags set internally only: */ |
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214 | #define IFF_CANTCHANGE \ |
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215 | (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\ |
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216 | IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI) |
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217 | |
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218 | |
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219 | /* |
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220 | * These really don't belong here, but there's no other obviously appropriate |
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221 | * location. |
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222 | */ |
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223 | #define IFP_AUI 0 |
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224 | #define IFP_10BASE2 1 |
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225 | #define IFP_10BASET 2 |
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226 | /* etc. */ |
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227 | |
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228 | /* |
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229 | * Bit values in if_ipending |
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230 | */ |
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231 | #define IFI_RECV 1 /* I want to receive */ |
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232 | #define IFI_XMIT 2 /* I want to transmit */ |
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233 | |
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234 | /* |
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235 | * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) |
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236 | * are queues of messages stored on ifqueue structures |
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237 | * (defined above). Entries are added to and deleted from these structures |
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238 | * by these macros, which should be called with ipl raised to splimp(). |
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239 | */ |
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240 | #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) |
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241 | #define IF_DROP(ifq) ((ifq)->ifq_drops++) |
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242 | #define IF_ENQUEUE(ifq, m) { \ |
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243 | /* printf(" IF_ENQUEUE: %p %p\n", ifq, m ); */ \ |
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244 | (m)->m_nextpkt = 0; \ |
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245 | if ((ifq)->ifq_tail == 0) \ |
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246 | (ifq)->ifq_head = m; \ |
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247 | else \ |
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248 | (ifq)->ifq_tail->m_nextpkt = m; \ |
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249 | (ifq)->ifq_tail = m; \ |
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250 | (ifq)->ifq_len++; \ |
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251 | } |
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252 | #define IF_PREPEND(ifq, m) { \ |
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253 | /* printf(" IF_PREPEND: %p %p\n", ifq, m ); */ \ |
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254 | (m)->m_nextpkt = (ifq)->ifq_head; \ |
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255 | if ((ifq)->ifq_tail == 0) \ |
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256 | (ifq)->ifq_tail = (m); \ |
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257 | (ifq)->ifq_head = (m); \ |
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258 | (ifq)->ifq_len++; \ |
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259 | } |
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260 | #define IF_DEQUEUE(ifq, m) { \ |
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261 | (m) = (ifq)->ifq_head; \ |
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262 | if (m) { \ |
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263 | /* printf(" IF_DEQUEUE: %p %p\n", ifq, m ); */ \ |
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264 | if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ |
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265 | (ifq)->ifq_tail = 0; \ |
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266 | (m)->m_nextpkt = 0; \ |
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267 | (ifq)->ifq_len--; \ |
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268 | } \ |
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269 | } |
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270 | |
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271 | #ifdef KERNEL |
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272 | #define IF_ENQ_DROP(ifq, m) if_enq_drop(ifq, m) |
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273 | |
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274 | #if defined(__GNUC__) && defined(MT_HEADER) |
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275 | static inline int |
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276 | if_queue_drop(struct ifqueue *ifq, struct mbuf *m) |
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277 | { |
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278 | IF_DROP(ifq); |
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279 | return 0; |
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280 | } |
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281 | |
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282 | static inline int |
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283 | if_enq_drop(struct ifqueue *ifq, struct mbuf *m) |
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284 | { |
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285 | if (IF_QFULL(ifq) && |
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286 | !if_queue_drop(ifq, m)) |
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287 | return 0; |
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288 | IF_ENQUEUE(ifq, m); |
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289 | return 1; |
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290 | } |
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291 | #else |
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292 | |
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293 | #ifdef MT_HEADER |
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294 | int if_enq_drop __P((struct ifqueue *, struct mbuf *)); |
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295 | #endif |
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296 | |
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297 | #endif |
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298 | #endif /* KERNEL */ |
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299 | |
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300 | #define IFQ_MAXLEN 50 |
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301 | #define IFNET_SLOWHZ 1 /* granularity is 1 second */ |
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302 | |
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303 | /* |
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304 | * The ifaddr structure contains information about one address |
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305 | * of an interface. They are maintained by the different address families, |
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306 | * are allocated and attached when an address is set, and are linked |
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307 | * together so all addresses for an interface can be located. |
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308 | */ |
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309 | struct ifaddr { |
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310 | struct sockaddr *ifa_addr; /* address of interface */ |
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311 | struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ |
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312 | #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ |
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313 | struct sockaddr *ifa_netmask; /* used to determine subnet */ |
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314 | struct ifnet *ifa_ifp; /* back-pointer to interface */ |
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315 | struct ifaddr *ifa_next; /* next address for interface */ |
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316 | void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ |
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317 | __P((int, struct rtentry *, struct sockaddr *)); |
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318 | u_short ifa_flags; /* mostly rt_flags for cloning */ |
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319 | short ifa_refcnt; /* references to this structure */ |
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320 | int ifa_metric; /* cost of going out this interface */ |
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321 | #ifdef notdef |
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322 | struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ |
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323 | #endif |
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324 | int (*ifa_claim_addr) /* check if an addr goes to this if */ |
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325 | __P((struct ifaddr *, struct sockaddr *)); |
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326 | |
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327 | }; |
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328 | #define IFA_ROUTE RTF_UP /* route installed */ |
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329 | |
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330 | /* |
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331 | * Message format for use in obtaining information about interfaces |
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332 | * from getkerninfo and the routing socket |
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333 | */ |
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334 | struct if_msghdr { |
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335 | u_short ifm_msglen; /* to skip over non-understood messages */ |
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336 | u_char ifm_version; /* future binary compatability */ |
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337 | u_char ifm_type; /* message type */ |
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338 | int ifm_addrs; /* like rtm_addrs */ |
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339 | int ifm_flags; /* value of if_flags */ |
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340 | u_short ifm_index; /* index for associated ifp */ |
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341 | struct if_data ifm_data;/* statistics and other data about if */ |
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342 | }; |
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343 | |
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344 | /* |
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345 | * Message format for use in obtaining information about interface addresses |
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346 | * from getkerninfo and the routing socket |
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347 | */ |
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348 | struct ifa_msghdr { |
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349 | u_short ifam_msglen; /* to skip over non-understood messages */ |
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350 | u_char ifam_version; /* future binary compatability */ |
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351 | u_char ifam_type; /* message type */ |
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352 | int ifam_addrs; /* like rtm_addrs */ |
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353 | int ifam_flags; /* value of ifa_flags */ |
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354 | u_short ifam_index; /* index for associated ifp */ |
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355 | int ifam_metric; /* value of ifa_metric */ |
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356 | }; |
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357 | |
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358 | /* |
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359 | * Interface request structure used for socket |
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360 | * ioctl's. All interface ioctl's must have parameter |
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361 | * definitions which begin with ifr_name. The |
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362 | * remainder may be interface specific. |
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363 | */ |
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364 | struct ifreq { |
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365 | #define IFNAMSIZ 16 |
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366 | char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ |
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367 | union { |
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368 | struct sockaddr ifru_addr; |
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369 | struct sockaddr ifru_dstaddr; |
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370 | struct sockaddr ifru_broadaddr; |
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371 | short ifru_flags; |
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372 | int ifru_metric; |
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373 | int ifru_mtu; |
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374 | int ifru_phys; |
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375 | int ifru_media; |
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376 | caddr_t ifru_data; |
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377 | int (*ifru_tap)(struct ifnet *, struct ether_header *, struct mbuf *); |
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378 | } ifr_ifru; |
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379 | #define ifr_addr ifr_ifru.ifru_addr /* address */ |
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380 | #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ |
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381 | #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ |
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382 | #define ifr_flags ifr_ifru.ifru_flags /* flags */ |
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383 | #define ifr_metric ifr_ifru.ifru_metric /* metric */ |
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384 | #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */ |
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385 | #define ifr_phys ifr_ifru.ifru_phys /* physical wire */ |
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386 | #define ifr_media ifr_ifru.ifru_media /* physical media */ |
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387 | #define ifr_data ifr_ifru.ifru_data /* for use by interface */ |
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388 | #define ifr_tap ifr_ifru.ifru_tap /* tap function */ |
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389 | }; |
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390 | |
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391 | struct ifaliasreq { |
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392 | char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ |
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393 | struct sockaddr ifra_addr; |
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394 | struct sockaddr ifra_broadaddr; |
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395 | struct sockaddr ifra_mask; |
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396 | }; |
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397 | |
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398 | struct ifmediareq { |
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399 | char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */ |
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400 | int ifm_current; /* current media options */ |
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401 | int ifm_mask; /* don't care mask */ |
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402 | int ifm_status; /* media status */ |
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403 | int ifm_active; /* active options */ |
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404 | int ifm_count; /* # entries in ifm_ulist array */ |
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405 | int *ifm_ulist; /* media words */ |
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406 | }; |
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407 | /* |
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408 | * Structure used in SIOCGIFCONF request. |
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409 | * Used to retrieve interface configuration |
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410 | * for machine (useful for programs which |
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411 | * must know all networks accessible). |
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412 | */ |
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413 | struct ifconf { |
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414 | int ifc_len; /* size of associated buffer */ |
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415 | union { |
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416 | caddr_t ifcu_buf; |
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417 | struct ifreq *ifcu_req; |
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418 | } ifc_ifcu; |
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419 | #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ |
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420 | #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ |
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421 | }; |
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422 | |
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423 | #include <net/if_arp.h> |
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424 | |
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425 | #ifdef KERNEL |
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426 | #define IFAFREE(ifa) \ |
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427 | if ((ifa)->ifa_refcnt <= 0) \ |
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428 | ifafree(ifa); \ |
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429 | else \ |
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430 | (ifa)->ifa_refcnt--; |
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431 | |
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432 | extern struct ifnet *ifnet; |
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433 | extern int ifqmaxlen; |
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434 | extern struct ifnet loif[]; |
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435 | extern int if_index; |
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436 | extern struct ifaddr **ifnet_addrs; |
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437 | |
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438 | void ether_ifattach __P((struct ifnet *)); |
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439 | void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *)); |
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440 | int ether_output __P((struct ifnet *, |
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441 | struct mbuf *, struct sockaddr *, struct rtentry *)); |
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442 | int ether_ioctl __P((struct ifnet *, int , caddr_t )); |
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443 | |
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444 | void if_attach __P((struct ifnet *)); |
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445 | void if_down __P((struct ifnet *)); |
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446 | void if_up __P((struct ifnet *)); |
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447 | #ifdef vax |
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448 | void ifubareset __P((int)); |
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449 | #endif |
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450 | /*void ifinit __P((void));*/ /* declared in systm.h for main() */ |
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451 | int ifioctl __P((struct socket *, int, caddr_t, struct proc *)); |
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452 | int ifpromisc __P((struct ifnet *, int)); |
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453 | struct ifnet *ifunit __P((char *)); |
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454 | |
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455 | int if_poll_recv_slow __P((struct ifnet *ifp, int *quotap)); |
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456 | void if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap)); |
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457 | void if_poll_throttle __P((void)); |
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458 | void if_poll_unthrottle __P((void *)); |
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459 | void if_poll_init __P((void)); |
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460 | void if_poll __P((void)); |
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461 | |
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462 | struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *)); |
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463 | struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *)); |
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464 | struct ifaddr *ifa_ifwithnet __P((struct sockaddr *)); |
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465 | struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *, |
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466 | struct sockaddr *)); |
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467 | struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *)); |
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468 | void ifafree __P((struct ifaddr *)); |
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469 | |
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470 | int looutput __P((struct ifnet *, |
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471 | struct mbuf *, struct sockaddr *, struct rtentry *)); |
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472 | #endif /* KERNEL */ |
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473 | |
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474 | #endif /* !_NET_IF_H_ */ |
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