- add netmap-libpcap

- add netmap (FreeBSD header files need to be updated with this)
- move prototype perl scripts to prototype/ folder
- create basic structure for sipcap app (no code yet)

netmap-libpcap/pcap-common.h

@@ -0,0 +1,25 @@
+
+/*
+ * We use the "receiver-makes-right" approach to byte order,
+ * because time is at a premium when we are writing the file.
+ * In other words, the pcap_file_header and pcap_pkthdr,
+ * records are written in host byte order.
+ * Note that the bytes of packet data are written out in the order in
+ * which they were received, so multi-byte fields in packets are not
+ * written in host byte order, they're written in whatever order the
+ * sending machine put them in.
+ *
+ * ntoh[ls] aren't sufficient because we might need to swap on a big-endian
+ * machine (if the file was written in little-end order).
+ */
+#define	SWAPLONG(y) \
+((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
+#define	SWAPSHORT(y) \
+	( (((y)&0xff)<<8) | ((u_short)((y)&0xff00)>>8) )
+
+extern int dlt_to_linktype(int dlt);
+
+extern int linktype_to_dlt(int linktype);
+
+extern void swap_pseudo_headers(int linktype, struct pcap_pkthdr *hdr,
+    u_char *data);