X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fpackets.h;h=39e88f1f571b35c28c5e2de5cba02388eda50ac3;hb=6f20002c1201c1fc78fc7cedb49b103d8afe9da6;hp=7ea462bcf77ae19e68e2961c5aeb7e5aad5d19b3;hpb=a0bc29a541fc7dc6e20137d5558e2094d614e6ab;p=openvswitch

diff --git a/lib/packets.h b/lib/packets.h
index 7ea462bc..39e88f1f 100644
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -18,9 +18,12 @@
 #define PACKETS_H 1
 
 #include <inttypes.h>
+#include <sys/types.h>
+#include <netinet/in.h>
 #include <stdint.h>
 #include <string.h>
 #include "compiler.h"
+#include "openvswitch/types.h"
 #include "random.h"
 #include "util.h"
 
@@ -33,6 +36,9 @@ bool dpid_from_string(const char *s, uint64_t *dpidp);
 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] OVS_UNUSED
     = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 
+static const uint8_t eth_addr_stp[ETH_ADDR_LEN] OVS_UNUSED
+    = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 };
+
 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;
@@ -42,19 +48,19 @@ 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]) 
+static inline bool eth_addr_is_local(const uint8_t ea[6])
 {
     /* Local if it is either a locally administered address or a Nicira random
      * address. */
     return !!(ea[0] & 2)
        || (ea[0] == 0x00 && ea[1] == 0x23 && ea[2] == 0x20 && !!(ea[3] & 0x80));
 }
-static inline bool eth_addr_is_zero(const uint8_t ea[6]) 
+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]) 
+                                   const uint8_t b[ETH_ADDR_LEN])
 {
     return !memcmp(a, b, ETH_ADDR_LEN);
 }
@@ -147,6 +153,7 @@ void compose_benign_packet(struct ofpbuf *, const char *tag,
 #define ETH_TYPE_IP            0x0800
 #define ETH_TYPE_ARP           0x0806
 #define ETH_TYPE_VLAN          0x8100
+#define ETH_TYPE_CFM           0x8902
 
 #define ETH_HEADER_LEN 14
 #define ETH_PAYLOAD_MIN 46
@@ -195,6 +202,24 @@ BUILD_ASSERT_DECL(LLC_SNAP_HEADER_LEN == sizeof(struct llc_snap_header));
 #define VLAN_PCP_MASK 0xe000
 #define VLAN_PCP_SHIFT 13
 
+#define VLAN_CFI 0x1000
+
+/* Given the vlan_tci field from an 802.1Q header, in network byte order,
+ * returns the VLAN ID in host byte order. */
+static inline uint16_t
+vlan_tci_to_vid(uint16_t vlan_tci)
+{
+    return (ntohs(vlan_tci) & VLAN_VID_MASK) >> VLAN_VID_SHIFT;
+}
+
+/* Given the vlan_tci field from an 802.1Q header, in network byte order,
+ * returns the priority code point (PCP) in host byte order. */
+static inline int
+vlan_tci_to_pcp(uint16_t vlan_tci)
+{
+    return (ntohs(vlan_tci) & VLAN_PCP_MASK) >> VLAN_PCP_SHIFT;
+}
+
 #define VLAN_HEADER_LEN 4
 struct vlan_header {
     uint16_t vlan_tci;          /* Lowest 12 bits are VLAN ID. */
@@ -212,6 +237,23 @@ struct vlan_eth_header {
 } __attribute__((packed));
 BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
 
+/* A 'ccm' represents a Continuity Check Message from the 802.1ag specification.
+ * Continuity Check Messages are broadcast periodically so that hosts can
+ * determine who they have connectivity to. */
+#define CCM_LEN 74
+#define CCM_MAID_LEN 48
+struct ccm {
+    uint8_t  mdlevel_version; /* MD Level and Version */
+    uint8_t  opcode;
+    uint8_t  flags;
+    uint8_t  tlv_offset;
+    uint32_t seq;
+    uint16_t mpid;
+    uint8_t  maid[CCM_MAID_LEN];
+    uint8_t  zero[16]; /* Defined by ITU-T Y.1731 should be zero */
+} __attribute__((packed));
+BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm));
+
 /* The "(void) (ip)[0]" below has no effect on the value, since it's the first
  * argument of a comma expression, but it makes sure that 'ip' is a pointer.
  * This is useful since a common mistake is to pass an integer instead of a
@@ -223,6 +265,15 @@ BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
         ((uint8_t *) ip)[2],                    \
         ((uint8_t *) ip)[3]
 
+/* Returns true if 'netmask' is a CIDR netmask, that is, if it consists of N
+ * high-order 1-bits and 32-N low-order 0-bits. */
+static inline bool
+ip_is_cidr(ovs_be32 netmask)
+{
+    uint32_t x = ~ntohl(netmask);
+    return !(x & (x + 1));
+}
+
 #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))