131 lines
4.8 KiB
C
131 lines
4.8 KiB
C
/* -*- mode: c; c-basic-offset: 4 -*- */
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#ifndef CLICKNET_ETHER_H
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#define CLICKNET_ETHER_H
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/*
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* <clicknet/ether.h> -- Ethernet and ARP headers, based on one of the BSDs.
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*
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* Relevant RFCs include:
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* RFC826 Ethernet Address Resolution Protocol: or, Converting Network
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* Protocol Addresses to 48.bit Ethernet Address for Transmission
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* on Ethernet Hardware
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* RFC894 Standard for the transmission of IP datagrams over Ethernet
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* networks
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* Also see the relevant IEEE 802 standards.
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*/
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struct click_ether {
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uint8_t ether_dhost[6]; /* 0-5 Ethernet destination address */
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uint8_t ether_shost[6]; /* 6-11 Ethernet source address */
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uint16_t ether_type; /* 12-13 Ethernet protocol */
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} CLICK_SIZE_PACKED_ATTRIBUTE;
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#define ETHERTYPE_IP 0x0800
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#define ETHERTYPE_ARP 0x0806
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#define ETHERTYPE_TRAIL 0x1000
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#define ETHERTYPE_8021Q 0x8100
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#define ETHERTYPE_IP6 0x86DD
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#define ETHERTYPE_MACCONTROL 0x8808
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#define ETHERTYPE_PPPOE_DISC 0x8863
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#define ETHERTYPE_PPPOE_SESSION 0x8864
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#define ETHERTYPE_GRID 0x7fff /* wvlan_cs driver won't transmit frames with high bit of protocol number set */
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struct click_arp { /* Offsets relative to ARP (Ethernet) header */
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uint16_t ar_hrd; /* 0-1 (14-15) hardware address format */
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#define ARPHRD_ETHER 1 /* Ethernet 10Mbps */
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#define ARPHRD_IEEE802 6 /* token ring */
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#define ARPHRD_ARCNET 7 /* Arcnet */
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#define ARPHRD_FRELAY 15 /* frame relay */
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#define ARPHRD_STRIP 23 /* Ricochet Starmode Radio */
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#define ARPHRD_IEEE1394 24 /* IEEE 1394 (FireWire) */
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#define ARPHRD_80211 801 /* IEEE 802.11 (wifi) */
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uint16_t ar_pro; /* 2-3 (16-17) protocol address format */
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uint8_t ar_hln; /* 4 (18) hardware address length */
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uint8_t ar_pln; /* 5 (19) protocol address length */
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uint16_t ar_op; /* 6-7 (20-21) opcode (command) */
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#define ARPOP_REQUEST 1 /* ARP request */
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#define ARPOP_REPLY 2 /* ARP reply */
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#define ARPOP_REVREQUEST 3 /* reverse request: hw->proto */
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#define ARPOP_REVREPLY 4 /* reverse reply */
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#define ARPOP_INVREQUEST 8 /* peer identification req */
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#define ARPOP_INVREPLY 9 /* peer identification reply */
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};
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struct click_ether_arp {
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struct click_arp ea_hdr; /* 0-7 (14-21) fixed-size ARP header */
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uint8_t arp_sha[6]; /* 8-13 (22-27) sender hardware address */
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uint8_t arp_spa[4]; /* 14-17 (28-31) sender protocol address */
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uint8_t arp_tha[6]; /* 18-23 (32-37) target hardware address */
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uint8_t arp_tpa[4]; /* 24-27 (38-41) target protocol address */
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};
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/* Ethernet with VLAN (802.1q) */
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struct click_ether_vlan {
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uint8_t ether_dhost[6]; /* 0-5 Ethernet source address */
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uint8_t ether_shost[6]; /* 6-11 Ethernet destination address */
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uint16_t ether_vlan_proto; /* 12-13 == ETHERTYPE_8021Q */
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uint16_t ether_vlan_tci; /* 14-15 tag control information */
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uint16_t ether_vlan_encap_proto; /* 16-17 Ethernet protocol */
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} CLICK_SIZE_PACKED_ATTRIBUTE;
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/* Ethernet MAC control (802.3) */
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struct click_ether_macctl {
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uint16_t ether_macctl_opcode;
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uint16_t ether_macctl_param;
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uint8_t ether_macctl_reserved[42];
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};
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#define ETHER_MACCTL_OP_PAUSE 0x0001
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#define ND_SOL 0x0087 /* Neighborhood Solicitation Message Type */
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#define ND_ADV 0x0088 /* Neighborhood Advertisement Message Type */
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/* define structure of Neighborhood Solicitation Message */
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struct click_nd_sol {
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uint8_t type;
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uint8_t code;
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uint16_t checksum;
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uint32_t reserved;
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uint8_t nd_tpa[16];
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uint8_t option_type; /*option type: 1 (source link-layer add) */
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uint8_t option_length; /*option length: 1 (in units of 8 octets) */
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uint8_t nd_sha[6]; /*source link-layer address */
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};
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/* define structure of Neighborhood Advertisement Message -reply to multicast neighborhood solitation message */
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struct click_nd_adv {
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uint8_t type;
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uint8_t code;
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uint16_t checksum;
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uint8_t flags; /* bit 1: sender_is_router
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bit 2: solicited
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bit 3: override
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all other bits should be zero */
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uint8_t reserved[3];
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uint8_t nd_tpa[16];
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uint8_t option_type; /* option type: 2 (target link-layer add) */
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uint8_t option_length; /* option length: 1 (in units of 8 octets) */
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uint8_t nd_tha[6]; /* source link-layer address */
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};
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/* define structure of Neighborhood Advertisement Message - reply to unicast neighborhood solitation message */
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struct click_nd_adv2 {
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uint8_t type;
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uint8_t code;
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uint16_t checksum;
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uint8_t flags; /* bit 1: sender_is_router
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bit 2: solicited
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bit 3: override
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all other bits should be zero */
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uint8_t reserved[3];
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uint8_t nd_tpa[16];
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};
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#endif
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