Add tcpdump and libpcap.

- Update the file builder generator to handle generator specific cflags and
  includes. The tcpdump and libpcap have localised headers and need specific
  headers paths to see them. There are also module specific flags and these
  need to be passed to the lex and yacc generators.

- Add the tcpdump support.

1 files changed, 111 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-ipnet.c b/freebsd/contrib/tcpdump/print-ipnet.c
new file mode 100644
index 00000000..75863458
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-ipnet.c
@@ -0,0 +1,111 @@
+#include <machine/rtems-bsd-user-space.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <pcap.h>
+
+#include "netdissect.h"
+#include "interface.h"
+#include "addrtoname.h"
+#include "ipnet.h"
+
+#ifdef DLT_IPNET
+
+const struct tok ipnet_values[] = {
+	{ IPH_AF_INET,		"IPv4" },
+	{ IPH_AF_INET6,		"IPv6" },
+	{ 0,			NULL }
+};
+
+static inline void
+ipnet_hdr_print(struct netdissect_options *ndo, const u_char *bp, u_int length)
+{
+	const ipnet_hdr_t *hdr;
+	hdr = (const ipnet_hdr_t *)bp;
+
+	ND_PRINT((ndo, "%d > %d", hdr->iph_zsrc, hdr->iph_zdst));
+
+	if (!ndo->ndo_qflag) {
+		ND_PRINT((ndo,", family %s (%d)",
+                          tok2str(ipnet_values, "Unknown",
+                                  hdr->iph_family),
+                          hdr->iph_family));
+        } else {
+		ND_PRINT((ndo,", %s",
+                          tok2str(ipnet_values,
+                                  "Unknown Ethertype (0x%04x)",
+                                  hdr->iph_family)));
+        }
+
+	ND_PRINT((ndo, ", length %u: ", length));
+}
+
+static void
+ipnet_print(struct netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
+{
+	ipnet_hdr_t *hdr;
+
+	if (caplen < sizeof(ipnet_hdr_t)) {
+		ND_PRINT((ndo, "[|ipnet]"));
+		return;
+	}
+
+	if (ndo->ndo_eflag)
+		ipnet_hdr_print(ndo, p, length);
+
+	length -= sizeof(ipnet_hdr_t);
+	caplen -= sizeof(ipnet_hdr_t);
+	hdr = (ipnet_hdr_t *)p;
+	p += sizeof(ipnet_hdr_t);
+
+	switch (hdr->iph_family) {
+
+	case IPH_AF_INET:
+	        ip_print(ndo, p, length);
+		break;
+
+#ifdef INET6
+	case IPH_AF_INET6:
+		ip6_print(ndo, p, length);
+		break;
+#endif /*INET6*/
+
+	default:
+		if (!ndo->ndo_eflag)
+			ipnet_hdr_print(ndo, (u_char *)hdr,
+					length + sizeof(ipnet_hdr_t));
+
+		if (!ndo->ndo_suppress_default_print)
+			ndo->ndo_default_print(ndo, p, caplen);
+		break;
+	}
+}
+
+/*
+ * This is the top level routine of the printer.  'p' points
+ * to the ether header of the packet, 'h->ts' is the timestamp,
+ * 'h->len' is the length of the packet off the wire, and 'h->caplen'
+ * is the number of bytes actually captured.
+ */
+u_int
+ipnet_if_print(struct netdissect_options *ndo,
+               const struct pcap_pkthdr *h, const u_char *p)
+{
+	ipnet_print(ndo, p, h->len, h->caplen);
+
+	return (sizeof(ipnet_hdr_t));
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
+
+#endif /* DLT_IPNET */