Make switches send error messages when they receive a bad request.

[sliver-openvswitch.git] / include / packets.h

diff --git a/include/packets.h b/include/packets.h
index 9ba5531..83b7184 100644 (file)
--- a/include/packets.h
+++ b/include/packets.h
@@ -35,11 +35,15 @@
 
 #include <stdint.h>
 #include <string.h>
+#include "compiler.h"
 #include "random.h"
 #include "util.h"
 
 #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;
@@ -52,6 +56,10 @@ 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]) 
 {
@@ -91,8 +99,10 @@ static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
 
 #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 + VLAN_HEADER_LEN + 1500)
+#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];
@@ -156,10 +166,20 @@ BUILD_ASSERT_DECL(VLAN_ETH_HEADER_LEN == sizeof(struct vlan_eth_header));
 
 #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;