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Diffstat (limited to 'libc/include/net/if_ether.h')
| -rw-r--r-- | libc/include/net/if_ether.h | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/libc/include/net/if_ether.h b/libc/include/net/if_ether.h new file mode 100644 index 0000000..121f9ac --- /dev/null +++ b/libc/include/net/if_ether.h @@ -0,0 +1,217 @@ +/* $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_ + +#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_ */ |