X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fpackets.h;h=4595c12cba74ec492944c895c7d43f0f12274587;hb=e8cf6733e490cf78c1e5f5f58c3655011fb8ae22;hp=f81489eee4902158865b82ce7210d80dc7df8b15;hpb=a14bc59fb8f27db193d74662dc9c5cb8237177ef;p=sliver-openvswitch.git

diff --git a/lib/packets.h b/lib/packets.h
index f81489eee..4595c12cb 100644
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -13,15 +13,19 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #ifndef PACKETS_H
 #define PACKETS_H 1
 
+#include <inttypes.h>
 #include <stdint.h>
 #include <string.h>
 #include "compiler.h"
 #include "random.h"
 #include "util.h"
 
+struct ofpbuf;
+
 #define ETH_ADDR_LEN           6
 
 static const uint8_t eth_addr_broadcast[ETH_ADDR_LEN] UNUSED
@@ -97,11 +101,38 @@ static inline bool eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN])
             && (ea[5] & 0xf0) == 0x00);
 }
 
+void compose_benign_packet(struct ofpbuf *, const char *tag,
+                           uint16_t snap_type,
+                           const uint8_t eth_src[ETH_ADDR_LEN]);
+
+/* Example:
+ *
+ * uint8_t mac[ETH_ADDR_LEN];
+ *    [...]
+ * printf("The Ethernet address is "ETH_ADDR_FMT"\n", ETH_ADDR_ARGS(mac));
+ *
+ */
 #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]
 
+/* Example:
+ *
+ * char *string = "1 00:11:22:33:44:55 2";
+ * uint8_t mac[ETH_ADDR_LEN];
+ * int a, b;
+ *
+ * if (sscanf(string, "%d"ETH_ADDR_SCAN_FMT"%d",
+ *     &a, ETH_ADDR_SCAN_ARGS(mac), &b) == 1 + ETH_ADDR_SCAN_COUNT + 1) {
+ *     ...
+ * }
+ */
+#define ETH_ADDR_SCAN_FMT "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8
+#define ETH_ADDR_SCAN_ARGS(ea) \
+        &(ea)[0], &(ea)[1], &(ea)[2], &(ea)[3], &(ea)[4], &(ea)[5]
+#define ETH_ADDR_SCAN_COUNT 6
+
 #define ETH_TYPE_IP            0x0800
 #define ETH_TYPE_ARP           0x0806
 #define ETH_TYPE_VLAN          0x8100