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, 163 insertions, 0 deletions

diff --git a/proto_ipv6_routing.c b/proto_ipv6_routing.c
new file mode 100644
index 0000000..735f976
--- /dev/null
+++ b/proto_ipv6_routing.c
@@ -0,0 +1,163 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
+ * Subject to the GPL, version 2.
+ *
+ * IPv6 Routing Header described in RFC2460
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <netinet/in.h>    /* for ntohs() and "struct in6_addr" */
+#include <arpa/inet.h>     /* for inet_ntop() */
+
+#include "proto.h"
+#include "protos.h"
+#include "dissector_eth.h"
+#include "built_in.h"
+#include "pkt_buff.h"
+
+#define ROUTING_HEADER_TYPE_0	0x00
+
+struct routinghdr {
+	uint8_t h_next_header;
+	uint8_t h_hdr_ext_len;
+	uint8_t h_routing_type;
+	uint8_t h_segments_left;
+} __packed;
+
+struct routinghdr_0 {
+	uint32_t reserved;
+	uint32_t addresses[0];
+} __packed;
+
+static void dissect_routinghdr_type_0(struct pkt_buff *pkt,
+				      ssize_t *data_len, int less)
+{
+	uint8_t num_addr;
+	char address[INET6_ADDRSTRLEN];
+	struct in6_addr *addr;
+	struct routinghdr_0 *routing_0;
+
+  	routing_0 = (struct routinghdr_0 *) pkt_pull(pkt, sizeof(*routing_0));
+	*data_len -= sizeof(*routing_0);
+	if (routing_0 == NULL || *data_len > pkt_len(pkt) || *data_len < 0)
+		return;
+
+	if (less) {
+		tprintf("Addresses (%lu)", *data_len / sizeof(struct in6_addr));
+		return;
+	}
+
+	tprintf("Res (0x%x)", routing_0->reserved);
+
+	num_addr = *data_len / sizeof(*addr);
+
+	while (num_addr--) {
+		addr = (struct in6_addr *) pkt_pull(pkt, sizeof(*addr));
+		*data_len -= sizeof(*addr);
+		if (addr == NULL || *data_len > pkt_len(pkt) || *data_len < 0)
+			return;
+
+		tprintf("\n\t   Address: %s",
+			inet_ntop(AF_INET6, addr, address,
+				  sizeof(address)));
+	}
+}
+
+static inline void dissect_routinghdr_type_0_norm(struct pkt_buff *pkt,
+						  ssize_t *data_len)
+{
+	dissect_routinghdr_type_0(pkt, data_len, 0);
+}
+
+static inline void dissect_routinghdr_type_0_less(struct pkt_buff *pkt,
+						  ssize_t *data_len)
+{
+	dissect_routinghdr_type_0(pkt, data_len, 1);
+}
+
+static void routing(struct pkt_buff *pkt)
+{
+	uint16_t hdr_ext_len;
+	ssize_t data_len;
+	struct routinghdr *routing;
+
+	routing = (struct routinghdr *) pkt_pull(pkt, sizeof(*routing));
+	if (routing == NULL)
+		return;
+
+	/* Total Header Length in Bytes */
+	hdr_ext_len = (routing->h_hdr_ext_len + 1) * 8;
+	/* Data length in Bytes */
+	data_len = hdr_ext_len - sizeof(*routing);
+
+	tprintf("\t [ Routing ");
+	tprintf("NextHdr (%u), ", routing->h_next_header);
+	if (data_len > pkt_len(pkt) || data_len < 0){
+		tprintf("HdrExtLen (%u, %u Bytes %s), ", routing->h_hdr_ext_len,
+		      hdr_ext_len, colorize_start_full(black, red)
+		      "invalid" colorize_end());
+		      return;
+	}
+	tprintf("HdrExtLen (%u, %u Bytes), ", routing->h_hdr_ext_len,
+		hdr_ext_len);
+	tprintf("Type (%u), ", routing->h_routing_type);
+	tprintf("Left (%u), ", routing->h_segments_left);
+
+	switch (routing->h_routing_type) {
+	case ROUTING_HEADER_TYPE_0:
+		dissect_routinghdr_type_0_norm(pkt, &data_len);
+		break;
+	default:
+		tprintf("Type %u is unknown", routing->h_routing_type);
+	}
+
+	tprintf(" ]\n");
+
+	if (data_len > pkt_len(pkt) || data_len < 0)
+		return;
+
+	pkt_pull(pkt, data_len);
+	pkt_set_proto(pkt, &eth_lay3, routing->h_next_header);
+}
+
+static void routing_less(struct pkt_buff *pkt)
+{
+	uint16_t hdr_ext_len;
+	ssize_t data_len;
+	struct routinghdr *routing;
+
+	routing = (struct routinghdr *) pkt_pull(pkt, sizeof(*routing));
+	if (routing == NULL)
+		return;
+
+	/* Total Header Length in Bytes */
+	hdr_ext_len = (routing->h_hdr_ext_len + 1) * 8;
+	/* Data length in Bytes */
+	data_len = hdr_ext_len - sizeof(*routing);
+	if (data_len > pkt_len(pkt) || data_len < 0)
+		return;
+
+	tprintf(" Routing ");
+	
+	switch (routing->h_routing_type) {
+	case ROUTING_HEADER_TYPE_0:
+		dissect_routinghdr_type_0_less(pkt, &data_len);
+		break;
+	default:
+		tprintf("Type %u is unknown", routing->h_routing_type);
+	}
+
+	if (data_len > pkt_len(pkt) || data_len < 0)
+		return;
+
+	pkt_pull(pkt, data_len);
+	pkt_set_proto(pkt, &eth_lay3, routing->h_next_header);
+}
+
+struct protocol ipv6_routing_ops = {
+	.key = 0x2B,
+	.print_full = routing,
+	.print_less = routing_less,
+};