Remove building with NOCRYPTO option
[minix.git] / sys / net / if_ether.h
blob09d031c533e19f68eabec20ea80b70f14dba125a
1 /* $NetBSD: if_ether.h,v 1.64 2014/07/28 14:24:48 ozaki-r Exp $ */
3 /*
4 * Copyright (c) 1982, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
31 * @(#)if_ether.h 8.1 (Berkeley) 6/10/93
34 #ifndef _NET_IF_ETHER_H_
35 #define _NET_IF_ETHER_H_
37 #ifdef _KERNEL
38 #ifdef _KERNEL_OPT
39 #include "opt_mbuftrace.h"
40 #endif
41 #include <sys/mbuf.h>
42 #endif
44 #ifndef _STANDALONE
45 #include <net/if.h>
46 #endif
49 * Some basic Ethernet constants.
51 #define ETHER_ADDR_LEN 6 /* length of an Ethernet address */
52 #define ETHER_TYPE_LEN 2 /* length of the Ethernet type field */
53 #define ETHER_CRC_LEN 4 /* length of the Ethernet CRC */
54 #define ETHER_HDR_LEN ((ETHER_ADDR_LEN * 2) + ETHER_TYPE_LEN)
55 #define ETHER_MIN_LEN 64 /* minimum frame length, including CRC */
56 #define ETHER_MAX_LEN 1518 /* maximum frame length, including CRC */
57 #define ETHER_MAX_LEN_JUMBO 9018 /* maximum jumbo frame len, including CRC */
60 * Some Ethernet extensions.
62 #define ETHER_VLAN_ENCAP_LEN 4 /* length of 802.1Q VLAN encapsulation */
63 #define ETHER_PPPOE_ENCAP_LEN 8 /* length of PPPoE encapsulation */
66 * Ethernet address - 6 octets
67 * this is only used by the ethers(3) functions.
69 struct ether_addr {
70 uint8_t ether_addr_octet[ETHER_ADDR_LEN];
71 } __packed;
73 #if defined(__minix)
74 #define ea_addr ether_addr_octet
75 typedef struct ether_addr ether_addr_t;
76 #endif /* defined(__minix) */
79 * Structure of a 10Mb/s Ethernet header.
81 struct ether_header {
82 uint8_t ether_dhost[ETHER_ADDR_LEN];
83 uint8_t ether_shost[ETHER_ADDR_LEN];
84 uint16_t ether_type;
85 } __packed;
87 #include <net/ethertypes.h>
89 #define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
90 #define ETHER_IS_LOCAL(addr) (*(addr) & 0x02) /* is address local? */
92 #define ETHERMTU_JUMBO (ETHER_MAX_LEN_JUMBO - ETHER_HDR_LEN - ETHER_CRC_LEN)
93 #define ETHERMTU (ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
94 #define ETHERMIN (ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
97 * Compute the maximum frame size based on ethertype (i.e. possible
98 * encapsulation) and whether or not an FCS is present.
100 #define ETHER_MAX_FRAME(ifp, etype, hasfcs) \
101 ((ifp)->if_mtu + ETHER_HDR_LEN + \
102 ((hasfcs) ? ETHER_CRC_LEN : 0) + \
103 (((etype) == ETHERTYPE_VLAN) ? ETHER_VLAN_ENCAP_LEN : 0) + \
104 (((etype) == ETHERTYPE_PPPOE) ? ETHER_PPPOE_ENCAP_LEN : 0))
107 * Ethernet CRC32 polynomials (big- and little-endian verions).
109 #define ETHER_CRC_POLY_LE 0xedb88320
110 #define ETHER_CRC_POLY_BE 0x04c11db6
112 #ifndef _STANDALONE
115 * Ethernet-specific mbuf flags.
117 #define M_HASFCS M_LINK0 /* FCS included at end of frame */
118 #define M_PROMISC M_LINK1 /* this packet is not for us */
120 #ifdef _KERNEL
122 * Macro to map an IP multicast address to an Ethernet multicast address.
123 * The high-order 25 bits of the Ethernet address are statically assigned,
124 * and the low-order 23 bits are taken from the low end of the IP address.
126 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
127 /* const struct in_addr *ipaddr; */ \
128 /* uint8_t enaddr[ETHER_ADDR_LEN]; */ \
129 do { \
130 (enaddr)[0] = 0x01; \
131 (enaddr)[1] = 0x00; \
132 (enaddr)[2] = 0x5e; \
133 (enaddr)[3] = ((const uint8_t *)ipaddr)[1] & 0x7f; \
134 (enaddr)[4] = ((const uint8_t *)ipaddr)[2]; \
135 (enaddr)[5] = ((const uint8_t *)ipaddr)[3]; \
136 } while (/*CONSTCOND*/0)
138 * Macro to map an IP6 multicast address to an Ethernet multicast address.
139 * The high-order 16 bits of the Ethernet address are statically assigned,
140 * and the low-order 32 bits are taken from the low end of the IP6 address.
142 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \
143 /* struct in6_addr *ip6addr; */ \
144 /* uint8_t enaddr[ETHER_ADDR_LEN]; */ \
146 (enaddr)[0] = 0x33; \
147 (enaddr)[1] = 0x33; \
148 (enaddr)[2] = ((const uint8_t *)ip6addr)[12]; \
149 (enaddr)[3] = ((const uint8_t *)ip6addr)[13]; \
150 (enaddr)[4] = ((const uint8_t *)ip6addr)[14]; \
151 (enaddr)[5] = ((const uint8_t *)ip6addr)[15]; \
153 #endif
155 struct mii_data;
157 struct ethercom;
159 typedef int (*ether_cb_t)(struct ethercom *);
162 * Structure shared between the ethernet driver modules and
163 * the multicast list code. For example, each ec_softc or il_softc
164 * begins with this structure.
166 struct ethercom {
167 struct ifnet ec_if; /* network-visible interface */
168 LIST_HEAD(, ether_multi) ec_multiaddrs; /* list of ether multicast
169 addrs */
170 int ec_multicnt; /* length of ec_multiaddrs
171 list */
172 int ec_capabilities; /* capabilities, provided by
173 driver */
174 int ec_capenable; /* tells hardware which
175 capabilities to enable */
177 int ec_nvlans; /* # VLANs on this interface */
178 /* The device handle for the MII bus child device. */
179 struct mii_data *ec_mii;
180 /* Called after a change to ec_if.if_flags. Returns
181 * ENETRESET if the device should be reinitialized with
182 * ec_if.if_init, 0 on success, not 0 on failure.
184 ether_cb_t ec_ifflags_cb;
185 #ifdef MBUFTRACE
186 struct mowner ec_rx_mowner; /* mbufs received */
187 struct mowner ec_tx_mowner; /* mbufs transmitted */
188 #endif
191 #define ETHERCAP_VLAN_MTU 0x00000001 /* VLAN-compatible MTU */
192 #define ETHERCAP_VLAN_HWTAGGING 0x00000002 /* hardware VLAN tag support */
193 #define ETHERCAP_JUMBO_MTU 0x00000004 /* 9000 byte MTU supported */
194 #define ETHERCAP_MASK 0x00000007
196 #define ECCAPBITS \
197 "\020" \
198 "\1VLAN_MTU" \
199 "\2VLAN_HWTAGGING" \
200 "\3JUMBO_MTU"
202 /* ioctl() for Ethernet capabilities */
203 struct eccapreq {
204 char eccr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
205 int eccr_capabilities; /* supported capabiliites */
206 int eccr_capenable; /* capabilities enabled */
209 #ifdef _KERNEL
210 extern const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN];
211 extern const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN];
212 extern const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN];
213 extern const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN];
215 void ether_set_ifflags_cb(struct ethercom *, ether_cb_t);
216 int ether_ioctl(struct ifnet *, u_long, void *);
217 int ether_addmulti(const struct sockaddr *, struct ethercom *);
218 int ether_delmulti(const struct sockaddr *, struct ethercom *);
219 int ether_multiaddr(const struct sockaddr *, uint8_t[], uint8_t[]);
220 void ether_input(struct ifnet *, struct mbuf *);
221 #endif /* _KERNEL */
224 * Ethernet multicast address structure. There is one of these for each
225 * multicast address or range of multicast addresses that we are supposed
226 * to listen to on a particular interface. They are kept in a linked list,
227 * rooted in the interface's ethercom structure.
229 struct ether_multi {
230 uint8_t enm_addrlo[ETHER_ADDR_LEN]; /* low or only address of range */
231 uint8_t enm_addrhi[ETHER_ADDR_LEN]; /* high or only address of range */
232 u_int enm_refcount; /* no. claims to this addr/range */
233 LIST_ENTRY(ether_multi) enm_list;
236 struct ether_multi_sysctl {
237 u_int enm_refcount;
238 uint8_t enm_addrlo[ETHER_ADDR_LEN];
239 uint8_t enm_addrhi[ETHER_ADDR_LEN];
243 * Structure used by macros below to remember position when stepping through
244 * all of the ether_multi records.
246 struct ether_multistep {
247 struct ether_multi *e_enm;
251 * Macro for looking up the ether_multi record for a given range of Ethernet
252 * multicast addresses connected to a given ethercom structure. If no matching
253 * record is found, "enm" returns NULL.
255 #define ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm) \
256 /* uint8_t addrlo[ETHER_ADDR_LEN]; */ \
257 /* uint8_t addrhi[ETHER_ADDR_LEN]; */ \
258 /* struct ethercom *ec; */ \
259 /* struct ether_multi *enm; */ \
261 for ((enm) = LIST_FIRST(&(ec)->ec_multiaddrs); \
262 (enm) != NULL && \
263 (memcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \
264 memcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \
265 (enm) = LIST_NEXT((enm), enm_list)); \
269 * Macro to step through all of the ether_multi records, one at a time.
270 * The current position is remembered in "step", which the caller must
271 * provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step"
272 * and get the first record. Both macros return a NULL "enm" when there
273 * are no remaining records.
275 #define ETHER_NEXT_MULTI(step, enm) \
276 /* struct ether_multistep step; */ \
277 /* struct ether_multi *enm; */ \
279 if (((enm) = (step).e_enm) != NULL) \
280 (step).e_enm = LIST_NEXT((enm), enm_list); \
283 #define ETHER_FIRST_MULTI(step, ec, enm) \
284 /* struct ether_multistep step; */ \
285 /* struct ethercom *ec; */ \
286 /* struct ether_multi *enm; */ \
288 (step).e_enm = LIST_FIRST(&(ec)->ec_multiaddrs); \
289 ETHER_NEXT_MULTI((step), (enm)); \
292 #ifdef _KERNEL
295 * Ethernet 802.1Q VLAN structures.
298 /* add VLAN tag to input/received packet */
299 static inline int vlan_input_tag(struct ifnet *, struct mbuf *, u_int);
300 static inline int
301 vlan_input_tag(struct ifnet *ifp, struct mbuf *m, u_int vlanid)
303 struct m_tag *mtag;
304 mtag = m_tag_get(PACKET_TAG_VLAN, sizeof(u_int), M_NOWAIT);
305 if (mtag == NULL) {
306 ifp->if_ierrors++;
307 printf("%s: unable to allocate VLAN tag\n", ifp->if_xname);
308 m_freem(m);
309 return 1;
311 *(u_int *)(mtag + 1) = vlanid;
312 m_tag_prepend(m, mtag);
313 return 0;
316 #define VLAN_INPUT_TAG(ifp, m, vlanid, _errcase) \
317 if (vlan_input_tag(ifp, m, vlanid) != 0) { \
318 _errcase; \
321 /* extract VLAN tag from output/trasmit packet */
322 #define VLAN_OUTPUT_TAG(ec, m0) \
323 (VLAN_ATTACHED(ec) ? m_tag_find((m0), PACKET_TAG_VLAN, NULL) : NULL)
325 /* extract VLAN ID value from a VLAN tag */
326 #define VLAN_TAG_VALUE(mtag) \
327 ((*(u_int *)(mtag + 1)) & 4095)
329 /* test if any VLAN is configured for this interface */
330 #define VLAN_ATTACHED(ec) ((ec)->ec_nvlans > 0)
332 void etherinit(void);
333 void ether_ifattach(struct ifnet *, const uint8_t *);
334 void ether_ifdetach(struct ifnet *);
335 int ether_mediachange(struct ifnet *);
336 void ether_mediastatus(struct ifnet *, struct ifmediareq *);
338 char *ether_sprintf(const uint8_t *);
339 char *ether_snprintf(char *, size_t, const uint8_t *);
341 uint32_t ether_crc32_le(const uint8_t *, size_t);
342 uint32_t ether_crc32_be(const uint8_t *, size_t);
344 int ether_aton_r(u_char *, size_t, const char *);
345 #else
347 * Prototype ethers(3) functions.
349 #include <sys/cdefs.h>
350 __BEGIN_DECLS
351 char * ether_ntoa(const struct ether_addr *);
352 struct ether_addr *
353 ether_aton(const char *);
354 int ether_ntohost(char *, const struct ether_addr *);
355 int ether_hostton(const char *, struct ether_addr *);
356 int ether_line(const char *, struct ether_addr *, char *);
357 __END_DECLS
358 #endif
360 #endif /* _STANDALONE */
362 #endif /* !_NET_IF_ETHER_H_ */