Changeset 83e0a25 for lib/trace.c

Timestamp:

10/06/04 14:16:40 (16 years ago)

Author:

Daniel Lawson <dlawson@…>

Branches:

4.0.1-hotfixes, cachetimestamps, develop, dpdk-ndag, etsilive, getfragoff, help, libtrace4, master, ndag_format, pfring, rc-4.0.1, rc-4.0.2, rc-4.0.3, rc-4.0.4, ringdecrementfix, ringperformance, ringtimestampfixes

Children:

cd6034c

Parents:

10814d7

Message:

poink

File:

• lib/trace.c (modified) (1 diff)

lib/trace.c

@@ -1196 +1196 @@
 }
 
+typedef enum {USE_DEST, USE_SOURCE} serverport_t;
+
+/** Attempt to deduce the 'server' port
+ * @param protocol the IP protocol (eg, 6 or 17 for TCP or UDP)
+ * @param source the TCP or UDP source port
+ * @param dest the TCP or UDP destination port
+ * @returns a hint as to which port is the server port
+ * @author Daniel Lawson
+ */
+#define ROOT_SERVER(x) (x < 512)
+#define ROOT_CLIENT(x) (512 <= x < 1024)
+#define NONROOT_SERVER(x) (x >= 5000)
+#define NONROOT_CLIENT(x) (1024 <= x < 5000)
+#define DYNAMIC(x) (49152 < x < 65535)
+#define SERVER(x) ROOT_SERVER(x) || NONROOT_SERVER(x)
+#define CLIENT(x) ROOT_CLIENT(x) || NONROOT_CLIENT(x) || DYNAMIC(x)
+
+int8_t trace_get_server_port(uint8_t protocol, uint16_t source, uint16_t dest) {
+        /*
+         * * If the ports are equal, return DEST
+         * * Check for well-known ports in the given protocol
+         * * Root server ports: 0 - 511
+         * * Root client ports: 512 - 1023
+         * * non-root client ports: 1024 - 4999
+         * * non-root server ports: 5000+
+         * * Check for static ranges: 1024 - 49151
+         * * Check for dynamic ranges: 49152 - 65535
+         * * flip a coin.
+         */
+
+        int8_t server, client;
+
+        if (SERVER(source) && CLIENT(dest)) {
+                return USE_SOURCE;
+        } else if (SERVER(dest) && CLIENT(SOURCE)) {
+                return USE_DEST;
+        } else if (ROOT_SERVER(source) && !ROOT_SERVER(dest)) {
+                return USE_SOURCE;
+        } else if (ROOT_SERVER(dest) && !ROOT_SERVER(source)) {
+                return USE_DEST;
+        }
+        
+        // failing that test...
+        if (source < dest) {
+                return USE_SOURCE;
+        } 
+        return USE_DEST;
+        
+}