| /* $NetBSD: if_ether.h,v 1.43 2006/11/24 01:04:30 rpaulo Exp $ */ |
| |
| /* |
| * Copyright (c) 1982, 1986, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)if_ether.h 8.1 (Berkeley) 6/10/93 |
| */ |
| |
| #ifndef _NET_IF_ETHER_H_ |
| #define _NET_IF_ETHER_H_ |
| |
| #include <sys/types.h> |
| |
| #ifdef _KERNEL |
| #ifdef _KERNEL_OPT |
| #include "opt_mbuftrace.h" |
| #endif |
| #include <sys/mbuf.h> |
| #endif |
| |
| /* |
| * Some basic Ethernet constants. |
| */ |
| #define ETHER_ADDR_LEN 6 /* length of an Ethernet address */ |
| #define ETHER_TYPE_LEN 2 /* length of the Ethernet type field */ |
| #define ETHER_CRC_LEN 4 /* length of the Ethernet CRC */ |
| #define ETHER_HDR_LEN ((ETHER_ADDR_LEN * 2) + ETHER_TYPE_LEN) |
| #define ETHER_MIN_LEN 64 /* minimum frame length, including CRC */ |
| #define ETHER_MAX_LEN 1518 /* maximum frame length, including CRC */ |
| #define ETHER_MAX_LEN_JUMBO 9018 /* maximum jumbo frame len, including CRC */ |
| |
| /* |
| * Some Ethernet extensions. |
| */ |
| #define ETHER_VLAN_ENCAP_LEN 4 /* length of 802.1Q VLAN encapsulation */ |
| |
| /* |
| * Ethernet address - 6 octets |
| * this is only used by the ethers(3) functions. |
| */ |
| struct ether_addr { |
| u_int8_t ether_addr_octet[ETHER_ADDR_LEN]; |
| } __attribute__((__packed__)); |
| |
| /* |
| * Structure of a 10Mb/s Ethernet header. |
| */ |
| struct ether_header { |
| u_int8_t ether_dhost[ETHER_ADDR_LEN]; |
| u_int8_t ether_shost[ETHER_ADDR_LEN]; |
| u_int16_t ether_type; |
| } __attribute__((__packed__)); |
| |
| #include <net/ethertypes.h> |
| |
| #define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */ |
| |
| #define ETHERMTU_JUMBO (ETHER_MAX_LEN_JUMBO - ETHER_HDR_LEN - ETHER_CRC_LEN) |
| #define ETHERMTU (ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN) |
| #define ETHERMIN (ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN) |
| |
| /* |
| * Compute the maximum frame size based on ethertype (i.e. possible |
| * encapsulation) and whether or not an FCS is present. |
| */ |
| #define ETHER_MAX_FRAME(ifp, etype, hasfcs) \ |
| ((ifp)->if_mtu + ETHER_HDR_LEN + \ |
| ((hasfcs) ? ETHER_CRC_LEN : 0) + \ |
| (((etype) == ETHERTYPE_VLAN) ? ETHER_VLAN_ENCAP_LEN : 0)) |
| |
| /* |
| * Ethernet CRC32 polynomials (big- and little-endian verions). |
| */ |
| #define ETHER_CRC_POLY_LE 0xedb88320 |
| #define ETHER_CRC_POLY_BE 0x04c11db6 |
| |
| #ifndef _STANDALONE |
| |
| /* |
| * Ethernet-specific mbuf flags. |
| */ |
| #define M_HASFCS M_LINK0 /* FCS included at end of frame */ |
| #define M_PROMISC M_LINK1 /* this packet is not for us */ |
| |
| #ifdef _KERNEL |
| /* |
| * Macro to map an IP multicast address to an Ethernet multicast address. |
| * The high-order 25 bits of the Ethernet address are statically assigned, |
| * and the low-order 23 bits are taken from the low end of the IP address. |
| */ |
| #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ |
| /* struct in_addr *ipaddr; */ \ |
| /* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \ |
| { \ |
| (enaddr)[0] = 0x01; \ |
| (enaddr)[1] = 0x00; \ |
| (enaddr)[2] = 0x5e; \ |
| (enaddr)[3] = ((u_int8_t *)ipaddr)[1] & 0x7f; \ |
| (enaddr)[4] = ((u_int8_t *)ipaddr)[2]; \ |
| (enaddr)[5] = ((u_int8_t *)ipaddr)[3]; \ |
| } |
| /* |
| * Macro to map an IP6 multicast address to an Ethernet multicast address. |
| * The high-order 16 bits of the Ethernet address are statically assigned, |
| * and the low-order 32 bits are taken from the low end of the IP6 address. |
| */ |
| #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \ |
| /* struct in6_addr *ip6addr; */ \ |
| /* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \ |
| { \ |
| (enaddr)[0] = 0x33; \ |
| (enaddr)[1] = 0x33; \ |
| (enaddr)[2] = ((u_int8_t *)ip6addr)[12]; \ |
| (enaddr)[3] = ((u_int8_t *)ip6addr)[13]; \ |
| (enaddr)[4] = ((u_int8_t *)ip6addr)[14]; \ |
| (enaddr)[5] = ((u_int8_t *)ip6addr)[15]; \ |
| } |
| #endif |
| |
| #define ETHERCAP_VLAN_MTU 0x00000001 /* VLAN-compatible MTU */ |
| #define ETHERCAP_VLAN_HWTAGGING 0x00000002 /* hardware VLAN tag support */ |
| #define ETHERCAP_JUMBO_MTU 0x00000004 /* 9000 byte MTU supported */ |
| |
| #ifdef _KERNEL |
| extern const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN]; |
| extern const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN]; |
| extern const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN]; |
| extern const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN]; |
| |
| int ether_ioctl(struct ifnet *, u_long, caddr_t); |
| int ether_addmulti (struct ifreq *, struct ethercom *); |
| int ether_delmulti (struct ifreq *, struct ethercom *); |
| int ether_changeaddr (struct ifreq *, struct ethercom *); |
| int ether_multiaddr(struct sockaddr *, u_int8_t[], u_int8_t[]); |
| |
| /* |
| * Ethernet 802.1Q VLAN structures. |
| */ |
| |
| /* add VLAN tag to input/received packet */ |
| #define VLAN_INPUT_TAG(ifp, m, vlanid, _errcase) \ |
| do { \ |
| struct m_tag *mtag = \ |
| m_tag_get(PACKET_TAG_VLAN, sizeof(u_int), M_NOWAIT);\ |
| if (mtag == NULL) { \ |
| ifp->if_ierrors++; \ |
| printf("%s: unable to allocate VLAN tag\n", \ |
| ifp->if_xname); \ |
| m_freem(m); \ |
| _errcase; \ |
| } \ |
| *(u_int *)(mtag + 1) = vlanid; \ |
| m_tag_prepend(m, mtag); \ |
| } while(0) |
| |
| /* extract VLAN tag from output/trasmit packet */ |
| #define VLAN_OUTPUT_TAG(ec, m0) \ |
| VLAN_ATTACHED(ec) ? m_tag_find((m0), PACKET_TAG_VLAN, NULL) : NULL |
| |
| /* extract VLAN ID value from a VLAN tag */ |
| #define VLAN_TAG_VALUE(mtag) \ |
| ((*(u_int *)(mtag + 1)) & 4095) |
| |
| /* test if any VLAN is configured for this interface */ |
| #define VLAN_ATTACHED(ec) ((ec)->ec_nvlans > 0) |
| |
| void ether_ifattach(struct ifnet *, const u_int8_t *); |
| void ether_ifdetach(struct ifnet *); |
| |
| char *ether_sprintf(const u_int8_t *); |
| char *ether_snprintf(char *, size_t, const u_int8_t *); |
| |
| u_int32_t ether_crc32_le(const u_int8_t *, size_t); |
| u_int32_t ether_crc32_be(const u_int8_t *, size_t); |
| |
| int ether_nonstatic_aton(u_char *, char *); |
| #else |
| /* |
| * Prototype ethers(3) functions. |
| */ |
| #include <sys/cdefs.h> |
| __BEGIN_DECLS |
| char * ether_ntoa __P((const struct ether_addr *)); |
| struct ether_addr * |
| ether_aton __P((const char *)); |
| int ether_ntohost __P((char *, const struct ether_addr *)); |
| int ether_hostton __P((const char *, struct ether_addr *)); |
| int ether_line __P((const char *, struct ether_addr *, char *)); |
| __END_DECLS |
| #endif |
| |
| #endif /* _STANDALONE */ |
| |
| #endif /* !_NET_IF_ETHER_H_ */ |
