1 files changed, 115 insertions, 0 deletions
diff --git a/dissector.c b/dissector.c
new file mode 100644
index 0000000..167d946
--- /dev/null
+++ b/dissector.c
@@ -0,0 +1,115 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2009, 2010, 2011, 2012 Daniel Borkmann.
+ * Subject to the GPL, version 2.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "built_in.h"
+#include "tprintf.h"
+#include "pkt_buff.h"
+#include "proto.h"
+#include "protos.h"
+#include "dissector.h"
+#include "dissector_eth.h"
+#include "dissector_80211.h"
+
+int dissector_set_print_type(void *ptr, int type)
+{
+	struct protocol *proto;
+
+	for (proto = ptr; proto; proto = proto->next) {
+		switch (type) {
+		case PRINT_NORM:
+			proto->process = proto->print_full;
+			break;
+		case PRINT_LESS:
+			proto->process = proto->print_less;
+			break;
+		default:
+			proto->process = NULL;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static void dissector_main(struct pkt_buff *pkt, struct protocol *start,
+			   struct protocol *end)
+{
+	struct protocol *proto;
+
+	if (!start)
+		return;
+
+	for (pkt->proto = start; pkt->proto; ) {
+		if (unlikely(!pkt->proto->process))
+			break;
+
+		proto = pkt->proto;
+		pkt->proto = NULL;
+		proto->process(pkt);
+	}
+
+	if (end && likely(end->process))
+		end->process(pkt);
+}
+
+void dissector_entry_point(uint8_t *packet, size_t len, int linktype, int mode)
+{
+	struct protocol *proto_start, *proto_end;
+	struct pkt_buff *pkt = NULL;
+
+	if (mode == PRINT_NONE)
+		return;
+
+	pkt = pkt_alloc(packet, len);
+
+	switch (linktype) {
+	case LINKTYPE_EN10MB:
+	case ___constant_swab32(LINKTYPE_EN10MB):
+		proto_start = dissector_get_ethernet_entry_point();
+		proto_end = dissector_get_ethernet_exit_point();
+		break;
+	case LINKTYPE_IEEE802_11:
+	case ___constant_swab32(LINKTYPE_IEEE802_11):
+		proto_start = dissector_get_ieee80211_entry_point();
+		proto_end = dissector_get_ieee80211_exit_point();
+		break;
+	default:
+		panic("Linktype not supported!\n");
+	};
+
+	dissector_main(pkt, proto_start, proto_end);
+
+	switch (mode) {
+	case PRINT_HEX:
+		hex(pkt);
+		break;
+	case PRINT_ASCII:
+		ascii(pkt);
+		break;
+	case PRINT_HEX_ASCII:
+		hex_ascii(pkt);
+		break;
+	}
+
+	tprintf_flush();
+	pkt_free(pkt);
+}
+
+void dissector_init_all(int fnttype)
+{
+	dissector_init_ethernet(fnttype);
+	dissector_init_ieee80211(fnttype);
+}
+
+void dissector_cleanup_all(void)
+{
+	dissector_cleanup_ethernet();
+	dissector_cleanup_ieee80211();
+}