+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
#ifndef PACKETS_H
#define PACKETS_H 1
#include <stdint.h>
+#include <string.h>
+#include "compiler.h"
+#include "random.h"
#include "util.h"
-/* Ethernet frames. */
#define ETH_ADDR_LEN 6
+static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] UNUSED
+ = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+static inline bool eth_addr_is_broadcast(const uint8_t ea[6])
+{
+ return (ea[0] & ea[1] & ea[2] & ea[3] & ea[4] & ea[5]) == 0xff;
+}
+static inline bool eth_addr_is_multicast(const uint8_t ea[6])
+{
+ return ea[0] & 1;
+}
+static inline bool eth_addr_is_local(const uint8_t ea[6])
+{
+ return ea[0] & 2;
+}
+static inline bool eth_addr_is_zero(const uint8_t ea[6])
+{
+ return !(ea[0] | ea[1] | ea[2] | ea[3] | ea[4] | ea[5]);
+}
+static inline bool eth_addr_equals(const uint8_t a[ETH_ADDR_LEN],
+ const uint8_t b[ETH_ADDR_LEN])
+{
+ return !memcmp(a, b, ETH_ADDR_LEN);
+}
+static inline uint64_t eth_addr_to_uint64(const uint8_t ea[ETH_ADDR_LEN])
+{
+ return (((uint64_t) ea[0] << 40)
+ | ((uint64_t) ea[1] << 32)
+ | ((uint64_t) ea[2] << 24)
+ | ((uint64_t) ea[3] << 16)
+ | ((uint64_t) ea[4] << 8)
+ | ea[5]);
+}
+static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
+{
+ ea[0] = x >> 40;
+ ea[1] = x >> 32;
+ ea[2] = x >> 24;
+ ea[3] = x >> 16;
+ ea[4] = x >> 8;
+ ea[5] = x;
+}
+static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
+{
+ random_bytes(ea, ETH_ADDR_LEN);
+}
+
+#define ETH_ADDR_FMT \
+ "%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8":%02"PRIx8
+#define ETH_ADDR_ARGS(ea) \
+ (ea)[0], (ea)[1], (ea)[2], (ea)[3], (ea)[4], (ea)[5]
+
#define ETH_TYPE_IP 0x0800
#define ETH_TYPE_ARP 0x0806
#define ETH_TYPE_VLAN 0x8100
#define ETH_HEADER_LEN 14
#define ETH_PAYLOAD_MIN 46
+#define ETH_PAYLOAD_MAX 1500
#define ETH_TOTAL_MIN (ETH_HEADER_LEN + ETH_PAYLOAD_MIN)
+#define ETH_TOTAL_MAX (ETH_HEADER_LEN + ETH_PAYLOAD_MAX)
+#define ETH_VLAN_TOTAL_MAX (ETH_HEADER_LEN + VLAN_HEADER_LEN + ETH_PAYLOAD_MAX)
struct eth_header {
uint8_t eth_dst[ETH_ADDR_LEN];
uint8_t eth_src[ETH_ADDR_LEN];
uint16_t eth_type;
-};
+} __attribute__((packed));
BUILD_ASSERT_DECL(ETH_HEADER_LEN == sizeof(struct eth_header));
#define LLC_DSAP_SNAP 0xaa
uint8_t llc_dsap;
uint8_t llc_ssap;
uint8_t llc_cntl;
-};
+} __attribute__((packed));
BUILD_ASSERT_DECL(LLC_HEADER_LEN == sizeof(struct llc_header));
#define SNAP_ORG_ETHERNET "\0\0" /* The compiler adds a null byte, so
struct llc_snap_header {
struct llc_header llc;
struct snap_header snap;
-};
+} __attribute__((packed));
BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
#define VLAN_VID 0x0fff
};
BUILD_ASSERT_DECL(VLAN_HEADER_LEN == sizeof(struct vlan_header));
+#define VLAN_ETH_HEADER_LEN (ETH_HEADER_LEN + VLAN_HEADER_LEN)
+struct vlan_eth_header {
+ uint8_t veth_dst[ETH_ADDR_LEN];
+ uint8_t veth_src[ETH_ADDR_LEN];
+ uint16_t veth_type; /* Always htons(ETH_TYPE_VLAN). */
+ uint16_t veth_tci; /* Lowest 12 bits are VLAN ID. */
+ uint16_t veth_next_type;
+} __attribute__((packed));
+BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
+
+#define IP_FMT "%"PRIu8".%"PRIu8".%"PRIu8".%"PRIu8
+#define IP_ARGS(ip) \
+ ((uint8_t *) ip)[0], \
+ ((uint8_t *) ip)[1], \
+ ((uint8_t *) ip)[2], \
+ ((uint8_t *) ip)[3]
+
#define IP_VER(ip_ihl_ver) ((ip_ihl_ver) >> 4)
#define IP_IHL(ip_ihl_ver) ((ip_ihl_ver) & 15)
+#define IP_IHL_VER(ihl, ver) (((ver) << 4) | (ihl))
+#define IP_TYPE_ICMP 1
#define IP_TYPE_TCP 6
#define IP_TYPE_UDP 17
+#define IP_VERSION 4
+
+#define IP_DONT_FRAGMENT 0x4000 /* Don't fragment. */
+#define IP_MORE_FRAGMENTS 0x2000 /* More fragments. */
+#define IP_FRAG_OFF_MASK 0x1fff /* Fragment offset. */
+#define IP_IS_FRAGMENT(ip_frag_off) \
+ ((ip_frag_off) & htons(IP_MORE_FRAGMENTS | IP_FRAG_OFF_MASK))
+
#define IP_HEADER_LEN 20
struct ip_header {
uint8_t ip_ihl_ver;
git://git.onelab.eu / sliver-openvswitch.git / blobdiff