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Diffstat (limited to 'test/packetdrill/ethernet.h')
| -rw-r--r-- | test/packetdrill/ethernet.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/test/packetdrill/ethernet.h b/test/packetdrill/ethernet.h new file mode 100644 index 0000000..5713d04 --- /dev/null +++ b/test/packetdrill/ethernet.h @@ -0,0 +1,75 @@ +/* + * Copyright 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ +/* + * Author: ncardwell@google.com (Neal Cardwell) + * + * Ethernet-related declarations. + * + * We cannot include the kernel's linux/if_ether.h because this tool + * tries to compile and work for basically any Linux/BSD kernel + * version. So we have our version of the Ethernet-related + * declarations we require here. + */ + +#ifndef __ETHERNET_H__ +#define __ETHERNET_H__ + +#include "types.h" + +/* Bytes in an Ethernet address. */ +#define ETH_ALEN 6 + +/* Ethernet header ether_type values. */ +#define ETHERTYPE_IP 0x0800 /* IP protocol version 4 */ +#define ETHERTYPE_IPV6 0x86dd /* IP protocol version 6 */ +#define ETHERTYPE_MPLS_UC 0x8847 /* MPLS unicast */ +#define ETHERTYPE_MPLS_MC 0x8848 /* MPLS multicast */ + +/* To tell a packet socket that you want traffic for all protocols. */ +#define ETH_P_ALL 0x0003 + +/* Ethernet address. */ +struct ether_addr { + u8 ether_addr_octet[ETH_ALEN]; +} __attribute__ ((__packed__)); + +/* Ethernet header. */ +struct ether_header { + u8 ether_dhost[ETH_ALEN]; /* destination Ethernet address */ + u8 ether_shost[ETH_ALEN]; /* source Ethernet address */ + u16 ether_type; /* packet type ID field */ +} __attribute__ ((__packed__)); + +static inline void ether_copy(void *dst, const void *src) +{ + memcpy(dst, src, sizeof(struct ether_addr)); +} + +/* Return the ether_type field for packets of the given address family. */ +static inline u16 ether_type_for_family(int address_family) +{ + if (address_family == AF_INET) + return ETHERTYPE_IP; + else if (address_family == AF_INET6) + return ETHERTYPE_IPV6; + else + assert(!"bad address family"); +} + +#endif /* __ETHERNET_H__ */ |