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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. | |
3 | * 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 | * | |
70c5ff60 | 33 | * from: @(#)if.h 7.11 (Berkeley) 3/19/91 |
3544846f | 34 | * $Id: if.h,v 1.7 1993/11/13 03:22:12 wollman Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
8ace4366 GW |
37 | #ifndef _NET_IF_H_ |
38 | #define _NET_IF_H_ 1 | |
39 | ||
15637ed4 RG |
40 | /* |
41 | * Structures defining a network interface, providing a packet | |
42 | * transport mechanism (ala level 0 of the PUP protocols). | |
43 | * | |
44 | * Each interface accepts output datagrams of a specified maximum | |
45 | * length, and provides higher level routines with input datagrams | |
46 | * received from its medium. | |
47 | * | |
48 | * Output occurs when the routine if_output is called, with three parameters: | |
49 | * (*ifp->if_output)(ifp, m, dst) | |
50 | * Here m is the mbuf chain to be sent and dst is the destination address. | |
51 | * The output routine encapsulates the supplied datagram if necessary, | |
52 | * and then transmits it on its medium. | |
53 | * | |
54 | * On input, each interface unwraps the data received by it, and either | |
55 | * places it on the input queue of a internetwork datagram routine | |
56 | * and posts the associated software interrupt, or passes the datagram to a raw | |
57 | * packet input routine. | |
58 | * | |
59 | * Routines exist for locating interfaces by their addresses | |
60 | * or for locating a interface on a certain network, as well as more general | |
61 | * routing and gateway routines maintaining information used to locate | |
62 | * interfaces. These routines live in the files if.c and route.c | |
63 | */ | |
64 | #ifndef _TIME_ /* XXX fast fix for SNMP, going away soon */ | |
65 | #ifdef KERNEL | |
66 | #include "../sys/time.h" | |
67 | #else | |
68 | #include <sys/time.h> | |
69 | #endif | |
70 | #endif | |
71 | ||
72 | /* | |
73 | * Structure defining a queue for a network interface. | |
74 | * | |
75 | * (Would like to call this struct ``if'', but C isn't PL/1.) | |
76 | */ | |
77 | ||
78 | struct ifnet { | |
79 | char *if_name; /* name, e.g. ``en'' or ``lo'' */ | |
80 | short if_unit; /* sub-unit for lower level driver */ | |
3544846f | 81 | u_short if_mtu; /* maximum transmission unit */ |
deb4b2da | 82 | short if_flags; /* up/down, broadcast, etc. */ |
15637ed4 RG |
83 | short if_timer; /* time 'til if_watchdog called */ |
84 | int if_metric; /* routing metric (external only) */ | |
85 | struct ifaddr *if_addrlist; /* linked list of addresses per if */ | |
86 | struct ifqueue { | |
87 | struct mbuf *ifq_head; | |
88 | struct mbuf *ifq_tail; | |
89 | int ifq_len; | |
90 | int ifq_maxlen; | |
91 | int ifq_drops; | |
92 | } if_snd; /* output queue */ | |
93 | /* procedure handles */ | |
94 | int (*if_init)(); /* init routine */ | |
95 | int (*if_output)(); /* output routine (enqueue) */ | |
96 | int (*if_start)(); /* initiate output routine */ | |
97 | int (*if_done)(); /* output complete routine */ | |
98 | int (*if_ioctl)(); /* ioctl routine */ | |
99 | int (*if_reset)(); /* bus reset routine */ | |
100 | int (*if_watchdog)(); /* timer routine */ | |
101 | /* generic interface statistics */ | |
102 | int if_ipackets; /* packets received on interface */ | |
103 | int if_ierrors; /* input errors on interface */ | |
104 | int if_opackets; /* packets sent on interface */ | |
105 | int if_oerrors; /* output errors on interface */ | |
106 | int if_collisions; /* collisions on csma interfaces */ | |
107 | /* end statistics */ | |
108 | struct ifnet *if_next; | |
109 | u_char if_type; /* ethernet, tokenring, etc */ | |
110 | u_char if_addrlen; /* media address length */ | |
111 | u_char if_hdrlen; /* media header length */ | |
112 | u_char if_index; /* numeric abbreviation for this if */ | |
113 | /* more statistics here to avoid recompiling netstat */ | |
114 | struct timeval if_lastchange; /* last updated */ | |
115 | int if_ibytes; /* total number of octets received */ | |
116 | int if_obytes; /* total number of octets sent */ | |
117 | int if_imcasts; /* packets received via multicast */ | |
118 | int if_omcasts; /* packets sent via multicast */ | |
119 | int if_iqdrops; /* dropped on input, this interface */ | |
120 | int if_noproto; /* destined for unsupported protocol */ | |
121 | int if_baudrate; /* linespeed */ | |
122 | int if_pcount; /* number of promiscuous listeners */ | |
123 | }; | |
124 | ||
125 | #define IFF_UP 0x1 /* interface is up */ | |
126 | #define IFF_BROADCAST 0x2 /* broadcast address valid */ | |
127 | #define IFF_DEBUG 0x4 /* turn on debugging */ | |
128 | #define IFF_LOOPBACK 0x8 /* is a loopback net */ | |
129 | #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ | |
130 | #define IFF_NOTRAILERS 0x20 /* avoid use of trailers */ | |
131 | #define IFF_RUNNING 0x40 /* resources allocated */ | |
132 | #define IFF_NOARP 0x80 /* no address resolution protocol */ | |
deb4b2da | 133 | /* next two not supported now, but reserved: */ |
15637ed4 RG |
134 | #define IFF_PROMISC 0x100 /* receive all packets */ |
135 | #define IFF_ALLMULTI 0x200 /* receive all multicast packets */ | |
136 | #define IFF_OACTIVE 0x400 /* transmission in progress */ | |
137 | #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */ | |
8ace4366 GW |
138 | #define IFF_LLC0 0x1000 /* IEEE 802.2 LLC class 0 */ |
139 | #define IFF_LLC1 0x2000 /* IEEE 802.2 LLC class 1 */ | |
140 | #define IFF_LLC2 0x4000 /* IEEE 802.2 LLC class 2 */ | |
141 | #ifdef notyet | |
142 | #define IFF_ALTPHYS 0x8000 /* alternative physical connection */ | |
143 | #define IFF_MULTICAST 0x10000 /* i'face supports multicast */ | |
144 | #define IFF_VIRTUAL 0x20000 /* i'face is really a VIF */ | |
15637ed4 | 145 | |
8ace4366 GW |
146 | /* flags set internally only: */ |
147 | #define IFF_CANTCHANGE \ | |
148 | (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|IFF_SIMPLEX\ | |
149 | IFF_MULTICAST|IFF_VIRTUAL) | |
150 | #else /* current code */ | |
15637ed4 RG |
151 | /* flags set internally only: */ |
152 | #define IFF_CANTCHANGE \ | |
deb4b2da | 153 | (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|IFF_SIMPLEX) |
8ace4366 GW |
154 | #endif /* not notyet */ |
155 | ||
15637ed4 RG |
156 | |
157 | /* | |
158 | * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1) | |
159 | * input routines have queues of messages stored on ifqueue structures | |
160 | * (defined above). Entries are added to and deleted from these structures | |
161 | * by these macros, which should be called with ipl raised to splimp(). | |
162 | */ | |
163 | #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) | |
164 | #define IF_DROP(ifq) ((ifq)->ifq_drops++) | |
165 | #define IF_ENQUEUE(ifq, m) { \ | |
166 | (m)->m_nextpkt = 0; \ | |
167 | if ((ifq)->ifq_tail == 0) \ | |
168 | (ifq)->ifq_head = m; \ | |
169 | else \ | |
170 | (ifq)->ifq_tail->m_nextpkt = m; \ | |
171 | (ifq)->ifq_tail = m; \ | |
172 | (ifq)->ifq_len++; \ | |
173 | } | |
174 | #define IF_PREPEND(ifq, m) { \ | |
175 | (m)->m_nextpkt = (ifq)->ifq_head; \ | |
176 | if ((ifq)->ifq_tail == 0) \ | |
177 | (ifq)->ifq_tail = (m); \ | |
178 | (ifq)->ifq_head = (m); \ | |
179 | (ifq)->ifq_len++; \ | |
180 | } | |
181 | #define IF_DEQUEUE(ifq, m) { \ | |
182 | (m) = (ifq)->ifq_head; \ | |
183 | if (m) { \ | |
184 | if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ | |
185 | (ifq)->ifq_tail = 0; \ | |
186 | (m)->m_nextpkt = 0; \ | |
187 | (ifq)->ifq_len--; \ | |
188 | } \ | |
189 | } | |
190 | ||
191 | #define IFQ_MAXLEN 50 | |
192 | #define IFNET_SLOWHZ 1 /* granularity is 1 second */ | |
193 | ||
194 | /* | |
195 | * The ifaddr structure contains information about one address | |
196 | * of an interface. They are maintained by the different address families, | |
197 | * are allocated and attached when an address is set, and are linked | |
198 | * together so all addresses for an interface can be located. | |
199 | */ | |
200 | struct ifaddr { | |
201 | struct sockaddr *ifa_addr; /* address of interface */ | |
202 | struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ | |
203 | #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ | |
204 | struct sockaddr *ifa_netmask; /* used to determine subnet */ | |
205 | struct ifnet *ifa_ifp; /* back-pointer to interface */ | |
206 | struct ifaddr *ifa_next; /* next address for interface */ | |
207 | int (*ifa_rtrequest)(); /* check or clean routes (+ or -)'d */ | |
208 | struct rtentry *ifa_rt; /* ??? for ROUTETOIF */ | |
209 | u_short ifa_flags; /* mostly rt_flags for cloning */ | |
210 | u_short ifa_llinfolen; /* extra to malloc for link info */ | |
211 | }; | |
212 | #define IFA_ROUTE RTF_UP /* route installed */ | |
213 | /* | |
214 | * Interface request structure used for socket | |
215 | * ioctl's. All interface ioctl's must have parameter | |
216 | * definitions which begin with ifr_name. The | |
217 | * remainder may be interface specific. | |
218 | */ | |
219 | struct ifreq { | |
220 | #define IFNAMSIZ 16 | |
221 | char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ | |
222 | union { | |
223 | struct sockaddr ifru_addr; | |
224 | struct sockaddr ifru_dstaddr; | |
225 | struct sockaddr ifru_broadaddr; | |
226 | short ifru_flags; | |
227 | int ifru_metric; | |
228 | caddr_t ifru_data; | |
229 | } ifr_ifru; | |
230 | #define ifr_addr ifr_ifru.ifru_addr /* address */ | |
231 | #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */ | |
232 | #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */ | |
233 | #define ifr_flags ifr_ifru.ifru_flags /* flags */ | |
234 | #define ifr_metric ifr_ifru.ifru_metric /* metric */ | |
235 | #define ifr_data ifr_ifru.ifru_data /* for use by interface */ | |
236 | }; | |
237 | ||
238 | struct ifaliasreq { | |
239 | char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ | |
240 | struct sockaddr ifra_addr; | |
241 | struct sockaddr ifra_broadaddr; | |
242 | struct sockaddr ifra_mask; | |
243 | }; | |
244 | ||
245 | /* | |
246 | * Structure used in SIOCGIFCONF request. | |
247 | * Used to retrieve interface configuration | |
248 | * for machine (useful for programs which | |
249 | * must know all networks accessible). | |
250 | */ | |
251 | struct ifconf { | |
252 | int ifc_len; /* size of associated buffer */ | |
253 | union { | |
254 | caddr_t ifcu_buf; | |
255 | struct ifreq *ifcu_req; | |
256 | } ifc_ifcu; | |
257 | #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */ | |
258 | #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */ | |
259 | }; | |
260 | ||
261 | #ifdef KERNEL | |
262 | #include "../net/if_arp.h" | |
8ace4366 GW |
263 | extern struct ifqueue rawintrq; /* raw packet input queue */ |
264 | extern struct ifnet *ifnet; | |
15637ed4 RG |
265 | struct ifaddr *ifa_ifwithaddr(), *ifa_ifwithnet(); |
266 | struct ifaddr *ifa_ifwithdstaddr(); | |
f78a4b51 GW |
267 | extern struct ifnet loif; |
268 | ||
269 | #else /* KERNEL */ | |
15637ed4 | 270 | #include <net/if_arp.h> |
f78a4b51 | 271 | #endif /* KERNEL */ |
8ace4366 | 272 | #endif /* _NET_IF_H_ */ |