* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
- * The SFLOW protocol as per http://www.sflow.org/developers/specifications.php
- *
*
*/
-#define NETDISSECT_REWORKED
+/* \summary: sFlow protocol printer */
+
+/* specification: http://www.sflow.org/developers/specifications.php */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
static int
print_sflow_counter_generic(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_generic_counter_t *sflow_gen_counter;
if (len < sizeof(struct sflow_generic_counter_t))
return 1;
-
sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
+ ND_TCHECK(*sflow_gen_counter);
ND_PRINT((ndo, "\n\t ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)",
EXTRACT_32BITS(sflow_gen_counter->ifindex),
EXTRACT_32BITS(sflow_gen_counter->iftype),
EXTRACT_32BITS(sflow_gen_counter->ifpromiscmode)));
return 0;
+
+trunc:
+ return 1;
}
static int
print_sflow_counter_ethernet(netdissect_options *ndo,
- const u_char *pointer, u_int len){
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_ethernet_counter_t *sflow_eth_counter;
if (len < sizeof(struct sflow_ethernet_counter_t))
return 1;
sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
+ ND_TCHECK(*sflow_eth_counter);
ND_PRINT((ndo, "\n\t align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
EXTRACT_32BITS(sflow_eth_counter->alignerrors),
EXTRACT_32BITS(sflow_eth_counter->fcserrors),
EXTRACT_32BITS(sflow_eth_counter->symbol_errors)));
return 0;
+
+trunc:
+ return 1;
}
static int
print_sflow_counter_token_ring(netdissect_options *ndo _U_,
- const u_char *pointer _U_, u_int len _U_) {
-
+ const u_char *pointer _U_, u_int len _U_)
+{
return 0;
}
static int
print_sflow_counter_basevg(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_100basevg_counter_t *sflow_100basevg_counter;
if (len < sizeof(struct sflow_100basevg_counter_t))
return 1;
sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
+ ND_TCHECK(*sflow_100basevg_counter);
ND_PRINT((ndo, "\n\t in high prio frames %u, in high prio octets %" PRIu64,
EXTRACT_32BITS(sflow_100basevg_counter->in_highpriority_frames),
EXTRACT_64BITS(sflow_100basevg_counter->in_highpriority_octets)));
EXTRACT_64BITS(sflow_100basevg_counter->hc_out_highpriority_octets)));
return 0;
+
+trunc:
+ return 1;
}
static int
print_sflow_counter_vlan(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_vlan_counter_t *sflow_vlan_counter;
if (len < sizeof(struct sflow_vlan_counter_t))
return 1;
sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
+ ND_TCHECK(*sflow_vlan_counter);
ND_PRINT((ndo, "\n\t vlan_id %u, octets %" PRIu64
", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
EXTRACT_32BITS(sflow_vlan_counter->vlan_id),
EXTRACT_32BITS(sflow_vlan_counter->discards)));
return 0;
+
+trunc:
+ return 1;
}
struct sflow_processor_counter_t {
static int
print_sflow_counter_processor(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_processor_counter_t *sflow_processor_counter;
if (len < sizeof(struct sflow_processor_counter_t))
return 1;
sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer;
+ ND_TCHECK(*sflow_processor_counter);
ND_PRINT((ndo, "\n\t 5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
", total_mem %" PRIu64,
EXTRACT_32BITS(sflow_processor_counter->five_sec_util),
EXTRACT_64BITS(sflow_processor_counter->free_memory)));
return 0;
+
+trunc:
+ return 1;
}
static int
sflow_print_counter_records(netdissect_options *ndo,
- const u_char *pointer, u_int len, u_int records) {
-
+ const u_char *pointer, u_int len, u_int records)
+{
u_int nrecords;
const u_char *tptr;
u_int tlen;
if (tlen < sizeof(struct sflow_counter_record_t))
return 1;
sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
+ ND_TCHECK(*sflow_counter_record);
enterprise = EXTRACT_32BITS(sflow_counter_record->format);
counter_type = enterprise & 0x0FFF;
}
return 0;
-}
+trunc:
+ return 1;
+}
static int
sflow_print_counter_sample(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_counter_sample_t *sflow_counter_sample;
u_int nrecords;
u_int typesource;
u_int type;
u_int index;
-
if (len < sizeof(struct sflow_counter_sample_t))
return 1;
sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer;
+ ND_TCHECK(*sflow_counter_sample);
typesource = EXTRACT_32BITS(sflow_counter_sample->typesource);
nrecords = EXTRACT_32BITS(sflow_counter_sample->records);
len - sizeof(struct sflow_counter_sample_t),
nrecords);
+trunc:
+ return 1;
}
static int
sflow_print_expanded_counter_sample(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample;
u_int nrecords;
return 1;
sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer;
+ ND_TCHECK(*sflow_expanded_counter_sample);
nrecords = EXTRACT_32BITS(sflow_expanded_counter_sample->records);
len - sizeof(struct sflow_expanded_counter_sample_t),
nrecords);
+trunc:
+ return 1;
}
static int
print_sflow_raw_packet(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_expanded_flow_raw_t *sflow_flow_raw;
if (len < sizeof(struct sflow_expanded_flow_raw_t))
return 1;
sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer;
+ ND_TCHECK(*sflow_flow_raw);
ND_PRINT((ndo, "\n\t protocol %s (%u), length %u, stripped bytes %u, header_size %u",
tok2str(sflow_flow_raw_protocol_values,"Unknown",EXTRACT_32BITS(sflow_flow_raw->protocol)),
EXTRACT_32BITS(sflow_flow_raw->protocol),
assuming of course there is wnough data present to do so... */
return 0;
+
+trunc:
+ return 1;
}
static int
print_sflow_ethernet_frame(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_ethernet_frame_t *sflow_ethernet_frame;
if (len < sizeof(struct sflow_ethernet_frame_t))
return 1;
sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer;
+ ND_TCHECK(*sflow_ethernet_frame);
ND_PRINT((ndo, "\n\t frame len %u, type %u",
EXTRACT_32BITS(sflow_ethernet_frame->length),
EXTRACT_32BITS(sflow_ethernet_frame->type)));
return 0;
+
+trunc:
+ return 1;
}
static int
print_sflow_extended_switch_data(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_extended_switch_data_t *sflow_extended_sw_data;
if (len < sizeof(struct sflow_extended_switch_data_t))
return 1;
sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer;
+ ND_TCHECK(*sflow_extended_sw_data);
ND_PRINT((ndo, "\n\t src vlan %u, src pri %u, dst vlan %u, dst pri %u",
EXTRACT_32BITS(sflow_extended_sw_data->src_vlan),
EXTRACT_32BITS(sflow_extended_sw_data->src_pri),
EXTRACT_32BITS(sflow_extended_sw_data->dst_pri)));
return 0;
+
+trunc:
+ return 1;
}
static int
sflow_print_flow_records(netdissect_options *ndo,
- const u_char *pointer, u_int len, u_int records) {
-
+ const u_char *pointer, u_int len, u_int records)
+{
u_int nrecords;
const u_char *tptr;
u_int tlen;
return 1;
sflow_flow_record = (const struct sflow_flow_record_t *)tptr;
+ ND_TCHECK(*sflow_flow_record);
/* so, the funky encoding means we cannot blythly mask-off
bits, we must also check the enterprise. */
}
return 0;
+
+trunc:
+ return 1;
}
static int
sflow_print_flow_sample(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_flow_sample_t *sflow_flow_sample;
u_int nrecords;
u_int typesource;
if (len < sizeof(struct sflow_flow_sample_t))
return 1;
- sflow_flow_sample = (struct sflow_flow_sample_t *)pointer;
+ sflow_flow_sample = (const struct sflow_flow_sample_t *)pointer;
+ ND_TCHECK(*sflow_flow_sample);
typesource = EXTRACT_32BITS(sflow_flow_sample->typesource);
nrecords = EXTRACT_32BITS(sflow_flow_sample->records);
len - sizeof(struct sflow_flow_sample_t),
nrecords);
+trunc:
+ return 1;
}
static int
sflow_print_expanded_flow_sample(netdissect_options *ndo,
- const u_char *pointer, u_int len) {
-
+ const u_char *pointer, u_int len)
+{
const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample;
u_int nrecords;
return 1;
sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer;
+ ND_TCHECK(*sflow_expanded_flow_sample);
nrecords = EXTRACT_32BITS(sflow_expanded_flow_sample->records);
len - sizeof(struct sflow_expanded_flow_sample_t),
nrecords);
+trunc:
+ return 1;
}
void
sflow_print(netdissect_options *ndo,
- const u_char *pptr, u_int len) {
-
+ const u_char *pptr, u_int len)
+{
const struct sflow_datagram_t *sflow_datagram;
const struct sflow_sample_header *sflow_sample;
uint32_t sflow_sample_type, sflow_sample_len;
uint32_t nsamples;
-
tptr = pptr;
tlen = len;
sflow_datagram = (const struct sflow_datagram_t *)pptr;
+ if (len < sizeof(struct sflow_datagram_t)) {
+ ND_TCHECK(sflow_datagram->version);
+ ND_PRINT((ndo, "sFlowv%u", EXTRACT_32BITS(sflow_datagram->version)));
+ ND_PRINT((ndo, " [length %u < %zu]",
+ len, sizeof(struct sflow_datagram_t)));
+ ND_PRINT((ndo, " (invalid)"));
+ return;
+ }
ND_TCHECK(*sflow_datagram);
/*
/* skip Common header */
tptr += sizeof(const struct sflow_datagram_t);
+
+ if(tlen <= sizeof(const struct sflow_datagram_t)) goto trunc;
tlen -= sizeof(const struct sflow_datagram_t);
while (nsamples > 0 && tlen > 0) {
projects / tcpdump / blobdiff