all: import netsniff-ng 0.5.8-rc0 source

We decided to get rid of the old Git history and start a new one for
several reasons:

 *) Allow / enforce only high-quality commits (which was not the case
    for many commits in the history), have a policy that is more close
    to the one from the Linux kernel. With high quality commits, we
    mean code that is logically split into commits and commit messages
    that are signed-off and have a proper subject and message body.
    We do not allow automatic Github merges anymore, since they are
    total bullshit. However, we will either cherry-pick your patches
    or pull them manually.

 *) The old archive was about ~27MB for no particular good reason.
    This basically derived from the bad decision that also some PDF
    files where stored there. From this moment onwards, no binary
    objects are allowed to be stored in this repository anymore.

The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 100 insertions, 0 deletions

diff --git a/proto_ipv6_hop_by_hop.c b/proto_ipv6_hop_by_hop.c
new file mode 100644
index 0000000..b0c5a0d
--- /dev/null
+++ b/proto_ipv6_hop_by_hop.c
@@ -0,0 +1,100 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
+ * Subject to the GPL, version 2.
+ *
+ * IPv6 Hop-By-Hop Header described in RFC2460
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <netinet/in.h>    /* for ntohs() */
+
+#include "proto.h"
+#include "protos.h"
+#include "dissector_eth.h"
+#include "built_in.h"
+#include "pkt_buff.h"
+
+struct hop_by_hophdr {
+	uint8_t h_next_header;
+	uint8_t hdr_len;
+} __packed;
+
+static void dissect_opt_hop (struct pkt_buff *pkt, ssize_t *opt_len)
+{
+	/* Have to been upgraded.
+	 * http://tools.ietf.org/html/rfc2460#section-4.2
+	 * Look also for proto_ipv6_dest_opts.h, it needs
+	 * dissect_opt(), too.
+	 */
+	if (*opt_len)
+		tprintf(", Option(s) recognized ");
+
+	/* If adding dissector reduce opt_len for each using of pkt_pull
+	 * to the same size.
+	 */
+}
+
+static void hop_by_hop(struct pkt_buff *pkt)
+{
+	uint16_t hdr_ext_len;
+	ssize_t opt_len;
+	struct hop_by_hophdr *hop_ops;
+
+	hop_ops = (struct hop_by_hophdr *) pkt_pull(pkt, sizeof(*hop_ops));
+	if (hop_ops == NULL)
+		return;
+
+	/* Total Header Length in Bytes */
+	hdr_ext_len = (hop_ops->hdr_len + 1) * 8;
+	/* Options length in Bytes */
+	opt_len = hdr_ext_len - sizeof(*hop_ops);
+
+	tprintf("\t [ Hop-by-Hop Options ");
+	tprintf("NextHdr (%u), ", hop_ops->h_next_header);
+	if (opt_len > pkt_len(pkt) || opt_len < 0){
+		tprintf("HdrExtLen (%u, %u Bytes, %s)", hop_ops->hdr_len,
+		      hdr_ext_len, colorize_start_full(black, red)
+		      "invalid" colorize_end());
+		      return;
+	}
+	tprintf("HdrExtLen (%u, %u Bytes)", hop_ops->hdr_len,
+		hdr_ext_len);
+
+	dissect_opt_hop(pkt, &opt_len);
+
+	tprintf(" ]\n");
+
+	pkt_pull(pkt, opt_len);
+	pkt_set_proto(pkt, &eth_lay3, hop_ops->h_next_header);
+}
+
+static void hop_by_hop_less(struct pkt_buff *pkt)
+{
+	uint16_t hdr_ext_len;
+	ssize_t opt_len;
+	struct hop_by_hophdr *hop_ops;
+
+	hop_ops = (struct hop_by_hophdr *) pkt_pull(pkt, sizeof(*hop_ops));
+	if (hop_ops == NULL)
+		return;
+
+	/* Total Header Length in Bytes */
+	hdr_ext_len = (hop_ops->hdr_len + 1) * 8;
+	/* Options length in Bytes */
+	opt_len = hdr_ext_len - sizeof(*hop_ops);
+	if (opt_len > pkt_len(pkt) || opt_len < 0)
+		return;
+
+	tprintf(" Hop Ops");
+
+	pkt_pull(pkt, opt_len);
+	pkt_set_proto(pkt, &eth_lay3, hop_ops->h_next_header);
+}
+
+struct protocol ipv6_hop_by_hop_ops = {
+	.key = 0x0,
+	.print_full = hop_by_hop,
+	.print_less = hop_by_hop_less,
+};