FreeBSD/Linux Kernel Cross Reference
sys/net/if.h
1 /*
2 * Copyright (c) 1982, 1986, 1989, 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. 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 *
33 * @(#)if.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: releng/5.0/sys/net/if.h 106925 2002-11-14 23:16:18Z sam $
35 */
36
37 #ifndef _NET_IF_H_
38 #define _NET_IF_H_
39
40 #include <sys/cdefs.h>
41
42 #ifdef _KERNEL
43 #include <sys/queue.h>
44 #endif
45
46 #if __BSD_VISIBLE
47 /*
48 * <net/if.h> does not depend on <sys/time.h> on most other systems. This
49 * helps userland compatibility. (struct timeval ifi_lastchange)
50 */
51 #ifndef _KERNEL
52 #include <sys/time.h>
53 #endif
54
55 struct ifnet;
56 #endif
57
58 /*
59 * Length of interface external name, including terminating '\0'.
60 * Note: this is the same size as a generic device's external name.
61 */
62 #define IF_NAMESIZE 16
63 #if __BSD_VISIBLE
64 #define IFNAMSIZ IF_NAMESIZE
65 #define IF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */
66 #endif
67
68 #ifdef _KERNEL
69 /*
70 * Structure describing a `cloning' interface.
71 */
72 struct if_clone {
73 LIST_ENTRY(if_clone) ifc_list; /* on list of cloners */
74 const char *ifc_name; /* name of device, e.g. `gif' */
75 size_t ifc_namelen; /* length of name */
76 int ifc_minifs; /* minimum number of interfaces */
77 int ifc_maxunit; /* maximum unit number */
78 unsigned char *ifc_units; /* bitmap to handle units */
79 int ifc_bmlen; /* bitmap length */
80
81 int (*ifc_create)(struct if_clone *, int);
82 void (*ifc_destroy)(struct ifnet *);
83 };
84
85 #define IF_CLONE_INITIALIZER(name, create, destroy, minifs, maxunit) \
86 { { 0 }, name, sizeof(name) - 1, minifs, maxunit, NULL, 0, create, destroy }
87 #endif
88
89 #if __BSD_VISIBLE
90
91 /*
92 * Structure used to query names of interface cloners.
93 */
94
95 struct if_clonereq {
96 int ifcr_total; /* total cloners (out) */
97 int ifcr_count; /* room for this many in user buffer */
98 char *ifcr_buffer; /* buffer for cloner names */
99 };
100
101 /*
102 * Structure describing information about an interface
103 * which may be of interest to management entities.
104 */
105 struct if_data {
106 /* generic interface information */
107 u_char ifi_type; /* ethernet, tokenring, etc */
108 u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */
109 u_char ifi_addrlen; /* media address length */
110 u_char ifi_hdrlen; /* media header length */
111 u_char ifi_recvquota; /* polling quota for receive intrs */
112 u_char ifi_xmitquota; /* polling quota for xmit intrs */
113 u_long ifi_mtu; /* maximum transmission unit */
114 u_long ifi_metric; /* routing metric (external only) */
115 u_long ifi_baudrate; /* linespeed */
116 /* volatile statistics */
117 u_long ifi_ipackets; /* packets received on interface */
118 u_long ifi_ierrors; /* input errors on interface */
119 u_long ifi_opackets; /* packets sent on interface */
120 u_long ifi_oerrors; /* output errors on interface */
121 u_long ifi_collisions; /* collisions on csma interfaces */
122 u_long ifi_ibytes; /* total number of octets received */
123 u_long ifi_obytes; /* total number of octets sent */
124 u_long ifi_imcasts; /* packets received via multicast */
125 u_long ifi_omcasts; /* packets sent via multicast */
126 u_long ifi_iqdrops; /* dropped on input, this interface */
127 u_long ifi_noproto; /* destined for unsupported protocol */
128 u_long ifi_hwassist; /* HW offload capabilities */
129 u_long ifi_unused; /* XXX was ifi_xmittiming */
130 struct timeval ifi_lastchange; /* time of last administrative change */
131 };
132
133 #define IFF_UP 0x1 /* interface is up */
134 #define IFF_BROADCAST 0x2 /* broadcast address valid */
135 #define IFF_DEBUG 0x4 /* turn on debugging */
136 #define IFF_LOOPBACK 0x8 /* is a loopback net */
137 #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */
138 #define IFF_SMART 0x20 /* interface manages own routes */
139 #define IFF_RUNNING 0x40 /* resources allocated */
140 #define IFF_NOARP 0x80 /* no address resolution protocol */
141 #define IFF_PROMISC 0x100 /* receive all packets */
142 #define IFF_ALLMULTI 0x200 /* receive all multicast packets */
143 #define IFF_OACTIVE 0x400 /* transmission in progress */
144 #define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
145 #define IFF_LINK0 0x1000 /* per link layer defined bit */
146 #define IFF_LINK1 0x2000 /* per link layer defined bit */
147 #define IFF_LINK2 0x4000 /* per link layer defined bit */
148 #define IFF_ALTPHYS IFF_LINK2 /* use alternate physical connection */
149 #define IFF_MULTICAST 0x8000 /* supports multicast */
150 #define IFF_POLLING 0x10000 /* Interface is in polling mode. */
151 #define IFF_PPROMISC 0x20000 /* user-requested promisc mode */
152 #define IFF_MONITOR 0x40000 /* user-requested monitor mode */
153
154 /* flags set internally only: */
155 #define IFF_CANTCHANGE \
156 (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
157 IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|IFF_PROMISC|\
158 IFF_POLLING)
159
160 /*
161 * Some convenience macros used for setting ifi_baudrate.
162 * XXX 1000 vs. 1024? --thorpej@netbsd.org
163 */
164 #define IF_Kbps(x) ((x) * 1000) /* kilobits/sec. */
165 #define IF_Mbps(x) (IF_Kbps((x) * 1000)) /* megabits/sec. */
166 #define IF_Gbps(x) (IF_Mbps((x) * 1000)) /* gigabits/sec. */
167
168 /* Capabilities that interfaces can advertise. */
169 #define IFCAP_RXCSUM 0x0001 /* can offload checksum on RX */
170 #define IFCAP_TXCSUM 0x0002 /* can offload checksum on TX */
171 #define IFCAP_NETCONS 0x0004 /* can be a network console */
172 #define IFCAP_VLAN_MTU 0x0008 /* VLAN-compatible MTU */
173 #define IFCAP_VLAN_HWTAGGING 0x0010 /* hardware VLAN tag support */
174 #define IFCAP_JUMBO_MTU 0x0020 /* 9000 byte MTU supported */
175
176 #define IFCAP_HWCSUM (IFCAP_RXCSUM | IFCAP_TXCSUM)
177
178 #define IFQ_MAXLEN 50
179 #define IFNET_SLOWHZ 1 /* granularity is 1 second */
180
181 /*
182 * Message format for use in obtaining information about interfaces
183 * from getkerninfo and the routing socket
184 */
185 struct if_msghdr {
186 u_short ifm_msglen; /* to skip over non-understood messages */
187 u_char ifm_version; /* future binary compatibility */
188 u_char ifm_type; /* message type */
189 int ifm_addrs; /* like rtm_addrs */
190 int ifm_flags; /* value of if_flags */
191 u_short ifm_index; /* index for associated ifp */
192 struct if_data ifm_data;/* statistics and other data about if */
193 };
194
195 /*
196 * Message format for use in obtaining information about interface addresses
197 * from getkerninfo and the routing socket
198 */
199 struct ifa_msghdr {
200 u_short ifam_msglen; /* to skip over non-understood messages */
201 u_char ifam_version; /* future binary compatibility */
202 u_char ifam_type; /* message type */
203 int ifam_addrs; /* like rtm_addrs */
204 int ifam_flags; /* value of ifa_flags */
205 u_short ifam_index; /* index for associated ifp */
206 int ifam_metric; /* value of ifa_metric */
207 };
208
209 /*
210 * Message format for use in obtaining information about multicast addresses
211 * from the routing socket
212 */
213 struct ifma_msghdr {
214 u_short ifmam_msglen; /* to skip over non-understood messages */
215 u_char ifmam_version; /* future binary compatibility */
216 u_char ifmam_type; /* message type */
217 int ifmam_addrs; /* like rtm_addrs */
218 int ifmam_flags; /* value of ifa_flags */
219 u_short ifmam_index; /* index for associated ifp */
220 };
221
222 /*
223 * Message format announcing the arrival or departure of a network interface.
224 */
225 struct if_announcemsghdr {
226 u_short ifan_msglen; /* to skip over non-understood messages */
227 u_char ifan_version; /* future binary compatibility */
228 u_char ifan_type; /* message type */
229 u_short ifan_index; /* index for associated ifp */
230 char ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
231 u_short ifan_what; /* what type of announcement */
232 };
233
234 #define IFAN_ARRIVAL 0 /* interface arrival */
235 #define IFAN_DEPARTURE 1 /* interface departure */
236
237 /*
238 * Interface request structure used for socket
239 * ioctl's. All interface ioctl's must have parameter
240 * definitions which begin with ifr_name. The
241 * remainder may be interface specific.
242 */
243 struct ifreq {
244 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
245 union {
246 struct sockaddr ifru_addr;
247 struct sockaddr ifru_dstaddr;
248 struct sockaddr ifru_broadaddr;
249 short ifru_flags[2];
250 short ifru_index;
251 int ifru_metric;
252 int ifru_mtu;
253 int ifru_phys;
254 int ifru_media;
255 caddr_t ifru_data;
256 int ifru_cap[2];
257 } ifr_ifru;
258 #define ifr_addr ifr_ifru.ifru_addr /* address */
259 #define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */
260 #define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
261 #define ifr_flags ifr_ifru.ifru_flags[0] /* flags (low 16 bits) */
262 #define ifr_flagshigh ifr_ifru.ifru_flags[1] /* flags (high 16 bits) */
263 #define ifr_metric ifr_ifru.ifru_metric /* metric */
264 #define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
265 #define ifr_phys ifr_ifru.ifru_phys /* physical wire */
266 #define ifr_media ifr_ifru.ifru_media /* physical media */
267 #define ifr_data ifr_ifru.ifru_data /* for use by interface */
268 #define ifr_reqcap ifr_ifru.ifru_cap[0] /* requested capabilities */
269 #define ifr_curcap ifr_ifru.ifru_cap[1] /* current capabilities */
270 #define ifr_index ifr_ifru.ifru_index /* interface index */
271 };
272
273 #define _SIZEOF_ADDR_IFREQ(ifr) \
274 ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
275 (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
276 (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
277
278 struct ifaliasreq {
279 char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
280 struct sockaddr ifra_addr;
281 struct sockaddr ifra_broadaddr;
282 struct sockaddr ifra_mask;
283 };
284
285 struct ifmediareq {
286 char ifm_name[IFNAMSIZ]; /* if name, e.g. "en0" */
287 int ifm_current; /* current media options */
288 int ifm_mask; /* don't care mask */
289 int ifm_status; /* media status */
290 int ifm_active; /* active options */
291 int ifm_count; /* # entries in ifm_ulist array */
292 int *ifm_ulist; /* media words */
293 };
294
295 /*
296 * Structure used to retrieve aux status data from interfaces.
297 * Kernel suppliers to this interface should respect the formatting
298 * needed by ifconfig(8): each line starts with a TAB and ends with
299 * a newline. The canonical example to copy and paste is in if_tun.c.
300 */
301
302 #define IFSTATMAX 800 /* 10 lines of text */
303 struct ifstat {
304 char ifs_name[IFNAMSIZ]; /* if name, e.g. "en0" */
305 char ascii[IFSTATMAX + 1];
306 };
307
308 /*
309 * Structure used in SIOCGIFCONF request.
310 * Used to retrieve interface configuration
311 * for machine (useful for programs which
312 * must know all networks accessible).
313 */
314 struct ifconf {
315 int ifc_len; /* size of associated buffer */
316 union {
317 caddr_t ifcu_buf;
318 struct ifreq *ifcu_req;
319 } ifc_ifcu;
320 #define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
321 #define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
322 };
323
324
325 /*
326 * Structure for SIOC[AGD]LIFADDR
327 */
328 struct if_laddrreq {
329 char iflr_name[IFNAMSIZ];
330 u_int flags;
331 #define IFLR_PREFIX 0x8000 /* in: prefix given out: kernel fills id */
332 u_int prefixlen; /* in/out */
333 struct sockaddr_storage addr; /* in/out */
334 struct sockaddr_storage dstaddr; /* out */
335 };
336
337 #endif /* __BSD_VISIBLE */
338
339 #ifdef _KERNEL
340 #ifdef MALLOC_DECLARE
341 MALLOC_DECLARE(M_IFADDR);
342 MALLOC_DECLARE(M_IFMADDR);
343 #endif
344 #endif
345
346 #ifndef _KERNEL
347 struct if_nameindex {
348 unsigned int if_index; /* 1, 2, ... */
349 char *if_name; /* null terminated name: "le0", ... */
350 };
351
352 __BEGIN_DECLS
353 void if_freenameindex(struct if_nameindex *);
354 char *if_indextoname(unsigned int, char *);
355 struct if_nameindex *if_nameindex(void);
356 unsigned int if_nametoindex(const char *);
357 __END_DECLS
358 #endif
359
360 #ifdef _KERNEL
361 struct thread;
362
363 /* XXX - this should go away soon. */
364 #include <net/if_var.h>
365 #endif
366
367 #endif /* !_NET_IF_H_ */
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