Changeset 80a2e99 for lib/trace.c

Timestamp:

11/11/04 10:54:36 (18 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:

a48d246

Parents:

533d7c1

Message:

set_direction
truncate_packet

File:

• lib/trace.c (modified) (2 diffs)

lib/trace.c

@@ -1299 +1299 @@
 }
 
+/** Set the direction flag, if it has one
+ * @param packet the packet opaque pointer
+ * @param direction the new direction (0,1,2,3)
+ * @returns a signed value containing the direction flag, or -1 if this is not supported
+ * @author Daniel Lawson
+ */
+int8_t trace_set_direction(struct libtrace_packet_t *packet, int8_t direction) {
+        
+        dag_record_t *erfptr = 0;
+        assert(packet);
+
+        switch(packet->trace->format) {
+                case DAG:
+                case ERF:
+                case RTCLIENT:
+                        erfptr = (dag_record_t *)packet->buffer;
+                        erfptr->flags.iface = direction;
+                        break;
+                default:
+                        direction = -1;
+        }
+        
+        return direction;
+        
+        
+}
+
 /** Get the direction flag, if it has one
  * @param libtrace the libtrace opaque pointer
@@ -1443 +1470 @@
         
 }
+
+/** Truncate the packet at the suggested length
+ * @param packet        the packet opaque pointer
+ * @param len           the new length of the packet
+ * @returns the new length of the packet, or the original length of the 
+ * packet if unchanged
+ * @author Daniel Lawson
+ */
+size_t trace_truncate_packet(struct libtrace_packet_t *packet, size_t size) {
+        dag_record_t *erfptr;
+        struct pcap_pkthdr *pcaphdr;
+
+        assert(packet);
+
+        if (size > packet->size) {
+                // can't make a packet larger
+                return packet->size;
+        }
+        switch (packet->trace->format) {
+                case PCAPINT:
+                case PCAP:
+                        pcaphdr = (struct pcap_pkthdr *)packet->buffer;
+                        pcaphdr->caplen = size;
+                        packet->size = size;
+                        break;
+                case ERF:
+                case DAG:
+                case RTCLIENT:
+                        erfptr = (dag_record_t *)packet->buffer;
+                        erfptr->rlen = ntohs(size);
+                        packet->size = size;
+                        break;
+                case WAGINT:
+                case WAG:
+                        // don't know how to do this?
+                        break;
+        }
+        return packet->size;
+}
+