/* \summary: sFlow protocol printer */
-/* specification: http://www.sflow.org/developers/specifications.php */
+/* specification: https://sflow.org/developers/specifications.php */
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
+#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
nd_uint32_t samples;
};
+struct sflow_v6_datagram_t {
+ nd_uint32_t version;
+ nd_uint32_t ip_version;
+ nd_ipv6 agent;
+ nd_uint32_t agent_id;
+ nd_uint32_t seqnum;
+ nd_uint32_t uptime;
+ nd_uint32_t samples;
+};
+
struct sflow_sample_header {
nd_uint32_t format;
nd_uint32_t len;
nd_uint32_t records;
};
-#define SFLOW_FLOW_RAW_PACKET 1
-#define SFLOW_FLOW_ETHERNET_FRAME 2
-#define SFLOW_FLOW_IPV4_DATA 3
-#define SFLOW_FLOW_IPV6_DATA 4
-#define SFLOW_FLOW_EXTENDED_SWITCH_DATA 1001
-#define SFLOW_FLOW_EXTENDED_ROUTER_DATA 1002
-#define SFLOW_FLOW_EXTENDED_GATEWAY_DATA 1003
-#define SFLOW_FLOW_EXTENDED_USER_DATA 1004
-#define SFLOW_FLOW_EXTENDED_URL_DATA 1005
-#define SFLOW_FLOW_EXTENDED_MPLS_DATA 1006
-#define SFLOW_FLOW_EXTENDED_NAT_DATA 1007
-#define SFLOW_FLOW_EXTENDED_MPLS_TUNNEL 1008
-#define SFLOW_FLOW_EXTENDED_MPLS_VC 1009
-#define SFLOW_FLOW_EXTENDED_MPLS_FEC 1010
-#define SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC 1011
-#define SFLOW_FLOW_EXTENDED_VLAN_TUNNEL 1012
+#define SFLOW_FLOW_RAW_PACKET 1
+#define SFLOW_FLOW_ETHERNET_FRAME 2
+#define SFLOW_FLOW_IPV4_DATA 3
+#define SFLOW_FLOW_IPV6_DATA 4
+#define SFLOW_FLOW_EXTENDED_SWITCH_DATA 1001
+#define SFLOW_FLOW_EXTENDED_ROUTER_DATA 1002
+#define SFLOW_FLOW_EXTENDED_GATEWAY_DATA 1003
+#define SFLOW_FLOW_EXTENDED_USER_DATA 1004
+#define SFLOW_FLOW_EXTENDED_URL_DATA 1005
+#define SFLOW_FLOW_EXTENDED_MPLS_DATA 1006
+#define SFLOW_FLOW_EXTENDED_NAT_DATA 1007
+#define SFLOW_FLOW_EXTENDED_MPLS_TUNNEL 1008
+#define SFLOW_FLOW_EXTENDED_MPLS_VC 1009
+#define SFLOW_FLOW_EXTENDED_MPLS_FEC 1010
+#define SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC 1011
+#define SFLOW_FLOW_EXTENDED_VLAN_TUNNEL 1012
static const struct tok sflow_flow_type_values[] = {
{ SFLOW_FLOW_RAW_PACKET, "Raw packet"},
return 1;
sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
- ND_TCHECK_SIZE(sflow_gen_counter);
ND_PRINT("\n\t ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)",
GET_BE_U_4(sflow_gen_counter->ifindex),
GET_BE_U_4(sflow_gen_counter->iftype),
GET_BE_U_4(sflow_gen_counter->ifpromiscmode));
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
- ND_TCHECK_SIZE(sflow_eth_counter);
ND_PRINT("\n\t align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
GET_BE_U_4(sflow_eth_counter->alignerrors),
GET_BE_U_4(sflow_eth_counter->fcserrors),
GET_BE_U_4(sflow_eth_counter->symbol_errors));
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
- ND_TCHECK_SIZE(sflow_100basevg_counter);
ND_PRINT("\n\t in high prio frames %u, in high prio octets %" PRIu64,
GET_BE_U_4(sflow_100basevg_counter->in_highpriority_frames),
GET_BE_U_8(sflow_100basevg_counter->in_highpriority_octets));
GET_BE_U_8(sflow_100basevg_counter->hc_out_highpriority_octets));
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
- ND_TCHECK_SIZE(sflow_vlan_counter);
ND_PRINT("\n\t vlan_id %u, octets %" PRIu64
", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
GET_BE_U_4(sflow_vlan_counter->vlan_id),
GET_BE_U_4(sflow_vlan_counter->discards));
return 0;
-
-trunc:
- return 1;
}
struct sflow_processor_counter_t {
return 1;
sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer;
- ND_TCHECK_SIZE(sflow_processor_counter);
ND_PRINT("\n\t 5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
", total_mem %" PRIu64,
GET_BE_U_4(sflow_processor_counter->five_sec_util),
GET_BE_U_8(sflow_processor_counter->free_memory));
return 0;
-
-trunc:
- return 1;
}
static int
tptr = pointer;
tlen = len;
- while (nrecords > 0) {
+ while (nrecords != 0) {
/* do we have the "header?" */
if (tlen < sizeof(struct sflow_counter_record_t))
return 1;
sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
- ND_TCHECK_SIZE(sflow_counter_record);
enterprise = GET_BE_U_4(sflow_counter_record->format);
counter_type = enterprise & 0x0FFF;
}
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer;
- ND_TCHECK_SIZE(sflow_counter_sample);
nrecords = GET_BE_U_4(sflow_counter_sample->records);
return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t),
len - sizeof(struct sflow_counter_sample_t),
nrecords);
-
-trunc:
- return 1;
}
static int
return 1;
sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer;
- ND_TCHECK_SIZE(sflow_expanded_counter_sample);
nrecords = GET_BE_U_4(sflow_expanded_counter_sample->records);
return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t),
len - sizeof(struct sflow_expanded_counter_sample_t),
nrecords);
-
-trunc:
- return 1;
}
static int
return 1;
sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer;
- ND_TCHECK_SIZE(sflow_flow_raw);
ND_PRINT("\n\t protocol %s (%u), length %u, stripped bytes %u, header_size %u",
tok2str(sflow_flow_raw_protocol_values,"Unknown",GET_BE_U_4(sflow_flow_raw->protocol)),
GET_BE_U_4(sflow_flow_raw->protocol),
GET_BE_U_4(sflow_flow_raw->header_size));
/* QUESTION - should we attempt to print the raw header itself?
- assuming of course there is wnough data present to do so... */
+ assuming of course there is enough data present to do so... */
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer;
- ND_TCHECK_SIZE(sflow_ethernet_frame);
ND_PRINT("\n\t frame len %u, type %u",
GET_BE_U_4(sflow_ethernet_frame->length),
GET_BE_U_4(sflow_ethernet_frame->type));
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer;
- ND_TCHECK_SIZE(sflow_extended_sw_data);
ND_PRINT("\n\t src vlan %u, src pri %u, dst vlan %u, dst pri %u",
GET_BE_U_4(sflow_extended_sw_data->src_vlan),
GET_BE_U_4(sflow_extended_sw_data->src_pri),
GET_BE_U_4(sflow_extended_sw_data->dst_pri));
return 0;
-
-trunc:
- return 1;
}
static int
tptr = pointer;
tlen = len;
- while (nrecords > 0) {
+ while (nrecords != 0) {
/* do we have the "header?" */
if (tlen < sizeof(struct sflow_flow_record_t))
return 1;
sflow_flow_record = (const struct sflow_flow_record_t *)tptr;
- ND_TCHECK_SIZE(sflow_flow_record);
- /* so, the funky encoding means we cannot blythly mask-off
+ /* so, the funky encoding means we cannot blithely mask-off
bits, we must also check the enterprise. */
enterprise = GET_BE_U_4(sflow_flow_record->format);
}
return 0;
-
-trunc:
- return 1;
}
static int
return 1;
sflow_flow_sample = (const struct sflow_flow_sample_t *)pointer;
- ND_TCHECK_SIZE(sflow_flow_sample);
nrecords = GET_BE_U_4(sflow_flow_sample->records);
return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t),
len - sizeof(struct sflow_flow_sample_t),
nrecords);
-
-trunc:
- return 1;
}
static int
return 1;
sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer;
- ND_TCHECK_SIZE(sflow_expanded_flow_sample);
nrecords = GET_BE_U_4(sflow_expanded_flow_sample->records);
GET_BE_U_4(sflow_expanded_flow_sample->rate),
GET_BE_U_4(sflow_expanded_flow_sample->pool),
GET_BE_U_4(sflow_expanded_flow_sample->drops),
- GET_BE_U_4(sflow_expanded_flow_sample->records));
+ nrecords);
return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t),
len - sizeof(struct sflow_expanded_flow_sample_t),
nrecords);
-
-trunc:
- return 1;
}
void
const u_char *pptr, u_int len)
{
const struct sflow_datagram_t *sflow_datagram;
+ const struct sflow_v6_datagram_t *sflow_v6_datagram;
const struct sflow_sample_header *sflow_sample;
const u_char *tptr;
u_int tlen;
uint32_t sflow_sample_type, sflow_sample_len;
uint32_t nsamples;
+ uint32_t ip_version;
ndo->ndo_protocol = "sflow";
tptr = pptr;
tlen = len;
sflow_datagram = (const struct sflow_datagram_t *)pptr;
- if (len < sizeof(struct sflow_datagram_t)) {
+ sflow_v6_datagram = (const struct sflow_v6_datagram_t *)pptr;
+ ip_version = GET_BE_U_4(sflow_datagram->ip_version);
+
+ if ((len < sizeof(struct sflow_datagram_t) && (ip_version == 1)) ||
+ (len < sizeof(struct sflow_v6_datagram_t) && (ip_version == 2))) {
ND_PRINT("sFlowv%u", GET_BE_U_4(sflow_datagram->version));
- ND_PRINT(" [length %u < %" PRIsize "]",
- len, sizeof(struct sflow_datagram_t));
+ ND_PRINT(" [length %u < %zu]", len, sizeof(struct sflow_datagram_t));
nd_print_invalid(ndo);
return;
}
if (ndo->ndo_vflag < 1) {
ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, length %u",
GET_BE_U_4(sflow_datagram->version),
- GET_BE_U_4(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
- ipaddr_string(ndo, sflow_datagram->agent),
- GET_BE_U_4(sflow_datagram->agent_id),
+ ip_version == 1 ? "IPv4" : "IPv6",
+ ip_version == 1 ? GET_IPADDR_STRING(sflow_datagram->agent) :
+ GET_IP6ADDR_STRING( sflow_v6_datagram->agent),
+ ip_version == 1 ? GET_BE_U_4(sflow_datagram->agent_id) :
+ GET_BE_U_4(sflow_v6_datagram->agent_id),
len);
return;
}
/* ok they seem to want to know everything - lets fully decode it */
- nsamples=GET_BE_U_4(sflow_datagram->samples);
- ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
- GET_BE_U_4(sflow_datagram->version),
- GET_BE_U_4(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
- ipaddr_string(ndo, sflow_datagram->agent),
- GET_BE_U_4(sflow_datagram->agent_id),
- GET_BE_U_4(sflow_datagram->seqnum),
- GET_BE_U_4(sflow_datagram->uptime),
- nsamples,
- len);
-
- /* skip Common header */
- tptr += sizeof(struct sflow_datagram_t);
- tlen -= sizeof(struct sflow_datagram_t);
-
- while (nsamples > 0 && tlen > 0) {
+ if (ip_version == 1) {
+ nsamples = GET_BE_U_4(sflow_datagram->samples);
+ ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
+ GET_BE_U_4(sflow_datagram->version),
+ "IPv4",
+ GET_IPADDR_STRING(sflow_datagram->agent),
+ GET_BE_U_4(sflow_datagram->agent_id),
+ GET_BE_U_4(sflow_datagram->seqnum),
+ GET_BE_U_4(sflow_datagram->uptime),
+ nsamples,
+ len);
+
+ /* skip Common header */
+ ND_ICHECK_ZU(tlen, <, sizeof(struct sflow_datagram_t));
+ tptr += sizeof(struct sflow_datagram_t);
+ tlen -= sizeof(struct sflow_datagram_t);
+ } else {
+ nsamples = GET_BE_U_4(sflow_v6_datagram->samples);
+ ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
+ GET_BE_U_4(sflow_v6_datagram->version),
+ "IPv6",
+ GET_IP6ADDR_STRING(sflow_v6_datagram->agent),
+ GET_BE_U_4(sflow_v6_datagram->agent_id),
+ GET_BE_U_4(sflow_v6_datagram->seqnum),
+ GET_BE_U_4(sflow_v6_datagram->uptime),
+ nsamples,
+ len);
+
+ /* skip Common header */
+ ND_ICHECK_ZU(tlen, <, sizeof(struct sflow_v6_datagram_t));
+ tptr += sizeof(struct sflow_v6_datagram_t);
+ tlen -= sizeof(struct sflow_v6_datagram_t);
+ }
+ while (nsamples != 0 && tlen != 0) {
sflow_sample = (const struct sflow_sample_header *)tptr;
- ND_TCHECK_SIZE(sflow_sample);
sflow_sample_type = (GET_BE_U_4(sflow_sample->format)&0x0FFF);
sflow_sample_len = GET_BE_U_4(sflow_sample->len);
if (tlen < sizeof(struct sflow_sample_header))
- goto trunc;
+ goto invalid;
tptr += sizeof(struct sflow_sample_header);
tlen -= sizeof(struct sflow_sample_header);
sflow_sample_len);
/* basic sanity check */
- if (sflow_sample_type == 0 || sflow_sample_len ==0) {
+ if (sflow_sample_type == 0 || sflow_sample_len == 0) {
return;
}
if (tlen < sflow_sample_len)
- goto trunc;
+ goto invalid;
/* did we capture enough for fully decoding the sample ? */
ND_TCHECK_LEN(tptr, sflow_sample_len);
switch(sflow_sample_type) {
case SFLOW_FLOW_SAMPLE:
if (sflow_print_flow_sample(ndo, tptr, tlen))
- goto trunc;
+ goto invalid;
break;
case SFLOW_COUNTER_SAMPLE:
if (sflow_print_counter_sample(ndo, tptr,tlen))
- goto trunc;
+ goto invalid;
break;
case SFLOW_EXPANDED_FLOW_SAMPLE:
if (sflow_print_expanded_flow_sample(ndo, tptr, tlen))
- goto trunc;
+ goto invalid;
break;
case SFLOW_EXPANDED_COUNTER_SAMPLE:
if (sflow_print_expanded_counter_sample(ndo, tptr,tlen))
- goto trunc;
+ goto invalid;
break;
default:
}
return;
- trunc:
- nd_print_trunc(ndo);
+invalid:
+ nd_print_invalid(ndo);
+ ND_TCHECK_LEN(tptr, tlen);
}
projects / tcpdump / blobdiff