1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
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14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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29 * The name and trademarks of copyright holder(s) may NOT be used in
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31 * derivatives without specific, written prior permission.
39 #define ETH_ADDR_LEN 6
41 static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
43 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
45 static inline bool eth_addr_is_multicast(const uint8_t ea[6])
49 static inline bool eth_addr_is_local(const uint8_t ea[6])
54 #define ETH_TYPE_IP 0x0800
55 #define ETH_TYPE_ARP 0x0806
56 #define ETH_TYPE_VLAN 0x8100
58 #define ETH_HEADER_LEN 14
59 #define ETH_PAYLOAD_MIN 46
60 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
61 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + 1500)
63 uint8_t eth_dst[ETH_ADDR_LEN];
64 uint8_t eth_src[ETH_ADDR_LEN];
67 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
69 #define LLC_DSAP_SNAP 0xaa
70 #define LLC_SSAP_SNAP 0xaa
71 #define LLC_CNTL_SNAP 3
73 #define LLC_HEADER_LEN 3
79 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
81 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
82 sizeof(SNAP_ORG_ETHERNET) == 3. */
83 #define SNAP_HEADER_LEN 5
87 } __attribute__((packed));
88 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
90 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
91 struct llc_snap_header {
92 struct llc_header llc;
93 struct snap_header snap;
95 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
97 #define VLAN_VID 0x0fff
99 #define VLAN_HEADER_LEN 4
101 uint16_t vlan_tci; /* Lowest 12 bits are VLAN ID. */
102 uint16_t vlan_next_type;
104 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
106 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
107 struct vlan_eth_header {
108 uint8_t veth_dst[ETH_ADDR_LEN];
109 uint8_t veth_src[ETH_ADDR_LEN];
110 uint16_t veth_type; /* Always htons(ETH_TYPE_VLAN). */
111 uint16_t veth_tci; /* Lowest 12 bits are VLAN ID. */
112 uint16_t veth_next_type;
114 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
116 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
117 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
119 #define IP_TYPE_TCP 6
120 #define IP_TYPE_UDP 17
122 #define IP_HEADER_LEN 20
128 uint16_t ip_frag_off;
135 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
137 #define UDP_HEADER_LEN 8
144 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
153 #define TCP_FLAGS(tcp_ctl) (htons(tcp_ctl) & 0x003f)
154 #define TCP_OFFSET(tcp_ctl) (htons(tcp_ctl) >> 12)
156 #define TCP_HEADER_LEN 20
167 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
169 #define ARP_HRD_ETHERNET 1
170 #define ARP_PRO_IP 0x0800
171 #define ARP_OP_REQUEST 1
172 #define ARP_OP_REPLY 2
174 #define ARP_ETH_HEADER_LEN 28
175 struct arp_eth_header {
176 /* Generic members. */
177 uint16_t ar_hrd; /* Hardware type. */
178 uint16_t ar_pro; /* Protocol type. */
179 uint8_t ar_hln; /* Hardware address length. */
180 uint8_t ar_pln; /* Protocol address length. */
181 uint16_t ar_op; /* Opcode. */
183 /* Ethernet+IPv4 specific members. */
184 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
185 uint32_t ar_spa; /* Sender protocol address. */
186 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
187 uint32_t ar_tpa; /* Target protocol address. */
188 } __attribute__((packed));
189 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
191 #endif /* packets.h */