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.
41 #define ETH_ADDR_LEN 6
43 static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
45 return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
47 static inline bool eth_addr_is_multicast(const uint8_t ea[6])
51 static inline bool eth_addr_is_local(const uint8_t ea[6])
55 static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
56 const uint8_t b[ETH_ADDR_LEN])
58 return !memcmp(a, b, ETH_ADDR_LEN);
60 static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
62 return (((uint64_t) ea[0] << 40)
63 | ((uint64_t) ea[1] << 32)
64 | ((uint64_t) ea[2] << 24)
65 | ((uint64_t) ea[3] << 16)
66 | ((uint64_t) ea[4] << 8)
69 static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
78 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
80 random_bytes(ea, ETH_ADDR_LEN);
83 #define ETH_ADDR_FMT \
84 "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
85 #define ETH_ADDR_ARGS(ea) \
86 (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
88 #define ETH_TYPE_IP 0x0800
89 #define ETH_TYPE_ARP 0x0806
90 #define ETH_TYPE_VLAN 0x8100
92 #define ETH_HEADER_LEN 14
93 #define ETH_PAYLOAD_MIN 46
94 #define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
95 #define ETH_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + 1500)
97 uint8_t eth_dst[ETH_ADDR_LEN];
98 uint8_t eth_src[ETH_ADDR_LEN];
100 } __attribute__((packed));
101 BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
103 #define LLC_DSAP_SNAP 0xaa
104 #define LLC_SSAP_SNAP 0xaa
105 #define LLC_CNTL_SNAP 3
107 #define LLC_HEADER_LEN 3
112 } __attribute__((packed));
113 BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
115 #define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
116 sizeof(SNAP_ORG_ETHERNET) == 3. */
117 #define SNAP_HEADER_LEN 5
121 } __attribute__((packed));
122 BUILD_ASSERT_DECL(SNAP_HEADER_LEN == sizeof(struct snap_header));
124 #define LLC_SNAP_HEADER_LEN (LLC_HEADER_LEN + SNAP_HEADER_LEN)
125 struct llc_snap_header {
126 struct llc_header llc;
127 struct snap_header snap;
128 } __attribute__((packed));
129 BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
131 #define VLAN_VID 0x0fff
133 #define VLAN_HEADER_LEN 4
135 uint16_t vlan_tci; /* Lowest 12 bits are VLAN ID. */
136 uint16_t vlan_next_type;
138 BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
140 #define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
141 struct vlan_eth_header {
142 uint8_t veth_dst[ETH_ADDR_LEN];
143 uint8_t veth_src[ETH_ADDR_LEN];
144 uint16_t veth_type; /* Always htons(ETH_TYPE_VLAN). */
145 uint16_t veth_tci; /* Lowest 12 bits are VLAN ID. */
146 uint16_t veth_next_type;
147 } __attribute__((packed));
148 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
150 #define IP_FMT "%"PRIu8".%"PRIu8".%"PRIu8".%"PRIu8
151 #define IP_ARGS(ip) \
152 ((uint8_t *) ip)[0], \
153 ((uint8_t *) ip)[1], \
154 ((uint8_t *) ip)[2], \
157 #define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
158 #define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
160 #define IP_TYPE_TCP 6
161 #define IP_TYPE_UDP 17
163 #define IP_HEADER_LEN 20
169 uint16_t ip_frag_off;
176 BUILD_ASSERT_DECL(IP_HEADER_LEN == sizeof(struct ip_header));
178 #define UDP_HEADER_LEN 8
185 BUILD_ASSERT_DECL(UDP_HEADER_LEN == sizeof(struct udp_header));
194 #define TCP_FLAGS(tcp_ctl) (htons(tcp_ctl) & 0x003f)
195 #define TCP_OFFSET(tcp_ctl) (htons(tcp_ctl) >> 12)
197 #define TCP_HEADER_LEN 20
208 BUILD_ASSERT_DECL(TCP_HEADER_LEN == sizeof(struct tcp_header));
210 #define ARP_HRD_ETHERNET 1
211 #define ARP_PRO_IP 0x0800
212 #define ARP_OP_REQUEST 1
213 #define ARP_OP_REPLY 2
215 #define ARP_ETH_HEADER_LEN 28
216 struct arp_eth_header {
217 /* Generic members. */
218 uint16_t ar_hrd; /* Hardware type. */
219 uint16_t ar_pro; /* Protocol type. */
220 uint8_t ar_hln; /* Hardware address length. */
221 uint8_t ar_pln; /* Protocol address length. */
222 uint16_t ar_op; /* Opcode. */
224 /* Ethernet+IPv4 specific members. */
225 uint8_t ar_sha[ETH_ADDR_LEN]; /* Sender hardware address. */
226 uint32_t ar_spa; /* Sender protocol address. */
227 uint8_t ar_tha[ETH_ADDR_LEN]; /* Target hardware address. */
228 uint32_t ar_tpa; /* Target protocol address. */
229 } __attribute__((packed));
230 BUILD_ASSERT_DECL(ARP_ETH_HEADER_LEN == sizeof(struct arp_eth_header));
232 #endif /* packets.h */