* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* Cisco NetFlow protocol */
+/*
+ * Cisco NetFlow protocol
+ *
+ * See
+ *
+ * http://www.cisco.com/c/en/us/td/docs/net_mgmt/netflow_collection_engine/3-6/user/guide/format.html#wp1005892
+ */
#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "tcp.h"
#include "ipproto.h"
-struct nfhdr {
- uint32_t ver_cnt; /* version [15], and # of records */
+struct nfhdr_v1 {
+ uint16_t version; /* version number */
+ uint16_t count; /* # of records */
+ uint32_t msys_uptime;
+ uint32_t utc_sec;
+ uint32_t utc_nsec;
+};
+
+struct nfrec_v1 {
+ struct in_addr src_ina;
+ struct in_addr dst_ina;
+ struct in_addr nhop_ina;
+ uint16_t input; /* SNMP index of input interface */
+ uint16_t output; /* SNMP index of output interface */
+ uint32_t packets; /* packets in the flow */
+ uint32_t octets; /* layer 3 octets in the packets of the flow */
+ uint32_t start_time; /* sys_uptime value at start of flow */
+ uint32_t last_time; /* sys_uptime value when last packet of flow was received */
+ uint16_t srcport; /* TCP/UDP source port or equivalent */
+ uint16_t dstport; /* TCP/UDP source port or equivalent */
+ uint16_t pad1; /* pad */
+ uint8_t proto; /* IP protocol type */
+ uint8_t tos; /* IP type of service */
+ uint8_t tcp_flags; /* cumulative OR of TCP flags */
+ uint8_t pad[3]; /* padding */
+ uint32_t reserved; /* unused */
+};
+
+struct nfhdr_v5 {
+ uint16_t version; /* version number */
+ uint16_t count; /* # of records */
+ uint32_t msys_uptime;
+ uint32_t utc_sec;
+ uint32_t utc_nsec;
+ uint32_t sequence; /* flow sequence number */
+ uint8_t engine_type; /* type of flow-switching engine */
+ uint8_t engine_id; /* slot number of the flow-switching engine */
+ uint16_t sampling_interval; /* sampling mode and interval */
+};
+
+struct nfrec_v5 {
+ struct in_addr src_ina;
+ struct in_addr dst_ina;
+ struct in_addr nhop_ina;
+ uint16_t input; /* SNMP index of input interface */
+ uint16_t output; /* SNMP index of output interface */
+ uint32_t packets; /* packets in the flow */
+ uint32_t octets; /* layer 3 octets in the packets of the flow */
+ uint32_t start_time; /* sys_uptime value at start of flow */
+ uint32_t last_time; /* sys_uptime value when last packet of flow was received */
+ uint16_t srcport; /* TCP/UDP source port or equivalent */
+ uint16_t dstport; /* TCP/UDP source port or equivalent */
+ uint8_t pad1; /* pad */
+ uint8_t tcp_flags; /* cumulative OR of TCP flags */
+ uint8_t proto; /* IP protocol type */
+ uint8_t tos; /* IP type of service */
+ uint16_t src_as; /* AS number of the source */
+ uint16_t dst_as; /* AS number of the destination */
+ uint8_t src_mask; /* source address mask bits */
+ uint8_t dst_mask; /* destination address prefix mask bits */
+ uint16_t pad2;
+ struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/
+};
+
+struct nfhdr_v6 {
+ uint16_t version; /* version number */
+ uint16_t count; /* # of records */
uint32_t msys_uptime;
uint32_t utc_sec;
uint32_t utc_nsec;
uint32_t reserved; /* v5 only */
};
-struct nfrec {
+struct nfrec_v6 {
struct in_addr src_ina;
struct in_addr dst_ina;
struct in_addr nhop_ina;
- uint32_t ifaces; /* src,dst ifaces */
- uint32_t packets;
- uint32_t octets;
- uint32_t start_time; /* sys_uptime value */
- uint32_t last_time; /* sys_uptime value */
- uint32_t ports; /* src,dst ports */
- uint32_t proto_tos; /* proto, tos, pad, flags(v5) */
- uint32_t asses; /* v1: flags; v5: src,dst AS */
- uint32_t masks; /* src,dst addr prefix; v6: encaps */
+ uint16_t input; /* SNMP index of input interface */
+ uint16_t output; /* SNMP index of output interface */
+ uint32_t packets; /* packets in the flow */
+ uint32_t octets; /* layer 3 octets in the packets of the flow */
+ uint32_t start_time; /* sys_uptime value at start of flow */
+ uint32_t last_time; /* sys_uptime value when last packet of flow was received */
+ uint16_t srcport; /* TCP/UDP source port or equivalent */
+ uint16_t dstport; /* TCP/UDP source port or equivalent */
+ uint8_t pad1; /* pad */
+ uint8_t tcp_flags; /* cumulative OR of TCP flags */
+ uint8_t proto; /* IP protocol type */
+ uint8_t tos; /* IP type of service */
+ uint16_t src_as; /* AS number of the source */
+ uint16_t dst_as; /* AS number of the destination */
+ uint8_t src_mask; /* source address mask bits */
+ uint8_t dst_mask; /* destination address prefix mask bits */
+ uint16_t flags;
struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/
};
-void
-cnfp_print(netdissect_options *ndo, const u_char *cp)
+static void
+cnfp_v1_print(netdissect_options *ndo, const u_char *cp)
{
- register const struct nfhdr *nh;
- register const struct nfrec *nr;
+ register const struct nfhdr_v1 *nh;
+ register const struct nfrec_v1 *nr;
struct protoent *pent;
int nrecs, ver;
#if 0
time_t t;
#endif
- nh = (const struct nfhdr *)cp;
+ nh = (const struct nfhdr_v1 *)cp;
ND_TCHECK(*nh);
- nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
- ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
+ ver = EXTRACT_16BITS(&nh->version);
+ nrecs = EXTRACT_32BITS(&nh->count);
#if 0
/*
* This is seconds since the UN*X epoch, and is followed by
EXTRACT_32BITS(&nh->msys_uptime)%1000,
EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
- if (ver == 5 || ver == 6) {
- ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
- nr = (const struct nfrec *)&nh[1];
- } else
- nr = (const struct nfrec *)&nh->sequence;
+ nr = (const struct nfrec_v1 *)&nh[1];
ND_PRINT((ndo, "%2u recs", nrecs));
/*
* Make sure we have the entire record.
*/
- if (ver == 5 || ver == 6) {
- ND_TCHECK(nr->masks);
- } else {
- ND_TCHECK(nr->proto_tos);
- }
+ ND_TCHECK(*nr);
ND_PRINT((ndo, "\n started %u.%03u, last %u.%03u",
EXTRACT_32BITS(&nr->start_time)/1000,
EXTRACT_32BITS(&nr->start_time)%1000,
EXTRACT_32BITS(&nr->last_time)%1000));
asbuf[0] = buf[0] = '\0';
- if (ver == 5 || ver == 6) {
- snprintf(buf, sizeof(buf), "/%u",
- (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
- snprintf(asbuf, sizeof(asbuf), ":%u",
- (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
- }
ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
- EXTRACT_32BITS(&nr->ports) >> 16));
+ EXTRACT_16BITS(&nr->srcport)));
+
+ ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
+ EXTRACT_16BITS(&nr->dstport)));
+
+ ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr)));
+
+ pent = getprotobynumber(nr->proto);
+ if (!pent || ndo->ndo_nflag)
+ ND_PRINT((ndo, "%u ", nr->proto));
+ else
+ ND_PRINT((ndo, "%s ", pent->p_name));
- if (ver == 5 || ver ==6) {
- snprintf(buf, sizeof(buf), "/%d",
- (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
- snprintf(asbuf, sizeof(asbuf), ":%u",
- EXTRACT_32BITS(&nr->asses) & 0xffff);
+ /* tcp flags for tcp only */
+ if (pent && pent->p_proto == IPPROTO_TCP) {
+ int flags;
+ flags = nr->tcp_flags;
+ ND_PRINT((ndo, "%s%s%s%s%s%s%s",
+ flags & TH_FIN ? "F" : "",
+ flags & TH_SYN ? "S" : "",
+ flags & TH_RST ? "R" : "",
+ flags & TH_PUSH ? "P" : "",
+ flags & TH_ACK ? "A" : "",
+ flags & TH_URG ? "U" : "",
+ flags ? " " : ""));
}
+
+ buf[0]='\0';
+ ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
+ nr->tos,
+ EXTRACT_32BITS(&nr->packets),
+ EXTRACT_32BITS(&nr->octets), buf));
+ }
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|cnfp]"));
+ return;
+}
+
+static void
+cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
+{
+ register const struct nfhdr_v5 *nh;
+ register const struct nfrec_v5 *nr;
+ struct protoent *pent;
+ int nrecs, ver;
+#if 0
+ time_t t;
+#endif
+
+ nh = (const struct nfhdr_v5 *)cp;
+ ND_TCHECK(*nh);
+
+ ver = EXTRACT_16BITS(&nh->version);
+ nrecs = EXTRACT_32BITS(&nh->count);
+#if 0
+ /*
+ * This is seconds since the UN*X epoch, and is followed by
+ * nanoseconds. XXX - format it, rather than just dumping the
+ * raw seconds-since-the-Epoch.
+ */
+ t = EXTRACT_32BITS(&nh->utc_sec);
+#endif
+
+ ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
+ EXTRACT_32BITS(&nh->msys_uptime)/1000,
+ EXTRACT_32BITS(&nh->msys_uptime)%1000,
+ EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
+
+ ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
+ nr = (const struct nfrec_v5 *)&nh[1];
+
+ ND_PRINT((ndo, "%2u recs", nrecs));
+
+ for (; nrecs != 0; nr++, nrecs--) {
+ char buf[20];
+ char asbuf[20];
+
+ /*
+ * Make sure we have the entire record.
+ */
+ ND_TCHECK(*nr);
+ ND_PRINT((ndo, "\n started %u.%03u, last %u.%03u",
+ EXTRACT_32BITS(&nr->start_time)/1000,
+ EXTRACT_32BITS(&nr->start_time)%1000,
+ EXTRACT_32BITS(&nr->last_time)/1000,
+ EXTRACT_32BITS(&nr->last_time)%1000));
+
+ asbuf[0] = buf[0] = '\0';
+ snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
+ snprintf(asbuf, sizeof(asbuf), ":%u",
+ EXTRACT_16BITS(&nr->src_as));
+ ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
+ EXTRACT_16BITS(&nr->srcport)));
+
+ snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
+ snprintf(asbuf, sizeof(asbuf), ":%u",
+ EXTRACT_16BITS(&nr->dst_as));
ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
- EXTRACT_32BITS(&nr->ports) & 0xffff));
+ EXTRACT_16BITS(&nr->dstport)));
ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr)));
- pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
+ pent = getprotobynumber(nr->proto);
if (!pent || ndo->ndo_nflag)
- ND_PRINT((ndo, "%u ",
- (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff));
+ ND_PRINT((ndo, "%u ", nr->proto));
else
ND_PRINT((ndo, "%s ", pent->p_name));
/* tcp flags for tcp only */
if (pent && pent->p_proto == IPPROTO_TCP) {
int flags;
- if (ver == 1)
- flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
- else
- flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
+ flags = nr->tcp_flags;
ND_PRINT((ndo, "%s%s%s%s%s%s%s",
flags & TH_FIN ? "F" : "",
flags & TH_SYN ? "S" : "",
}
buf[0]='\0';
- if (ver == 6) {
- snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
- (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
- (EXTRACT_32BITS(&nr->masks)) & 0xff);
+ ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
+ nr->tos,
+ EXTRACT_32BITS(&nr->packets),
+ EXTRACT_32BITS(&nr->octets), buf));
+ }
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|cnfp]"));
+ return;
+}
+
+static void
+cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
+{
+ register const struct nfhdr_v6 *nh;
+ register const struct nfrec_v6 *nr;
+ struct protoent *pent;
+ int nrecs, ver;
+#if 0
+ time_t t;
+#endif
+
+ nh = (const struct nfhdr_v6 *)cp;
+ ND_TCHECK(*nh);
+
+ ver = EXTRACT_16BITS(&nh->version);
+ nrecs = EXTRACT_32BITS(&nh->count);
+#if 0
+ /*
+ * This is seconds since the UN*X epoch, and is followed by
+ * nanoseconds. XXX - format it, rather than just dumping the
+ * raw seconds-since-the-Epoch.
+ */
+ t = EXTRACT_32BITS(&nh->utc_sec);
+#endif
+
+ ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
+ EXTRACT_32BITS(&nh->msys_uptime)/1000,
+ EXTRACT_32BITS(&nh->msys_uptime)%1000,
+ EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
+
+ ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
+ nr = (const struct nfrec_v6 *)&nh[1];
+
+ ND_PRINT((ndo, "%2u recs", nrecs));
+
+ for (; nrecs != 0; nr++, nrecs--) {
+ char buf[20];
+ char asbuf[20];
+
+ /*
+ * Make sure we have the entire record.
+ */
+ ND_TCHECK(*nr);
+ ND_PRINT((ndo, "\n started %u.%03u, last %u.%03u",
+ EXTRACT_32BITS(&nr->start_time)/1000,
+ EXTRACT_32BITS(&nr->start_time)%1000,
+ EXTRACT_32BITS(&nr->last_time)/1000,
+ EXTRACT_32BITS(&nr->last_time)%1000));
+
+ asbuf[0] = buf[0] = '\0';
+ snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
+ snprintf(asbuf, sizeof(asbuf), ":%u",
+ EXTRACT_16BITS(&nr->src_as));
+ ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
+ EXTRACT_16BITS(&nr->srcport)));
+
+ snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
+ snprintf(asbuf, sizeof(asbuf), ":%u",
+ EXTRACT_16BITS(&nr->dst_as));
+ ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
+ EXTRACT_16BITS(&nr->dstport)));
+
+ ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr)));
+
+ pent = getprotobynumber(nr->proto);
+ if (!pent || ndo->ndo_nflag)
+ ND_PRINT((ndo, "%u ", nr->proto));
+ else
+ ND_PRINT((ndo, "%s ", pent->p_name));
+
+ /* tcp flags for tcp only */
+ if (pent && pent->p_proto == IPPROTO_TCP) {
+ int flags;
+ flags = nr->tcp_flags;
+ ND_PRINT((ndo, "%s%s%s%s%s%s%s",
+ flags & TH_FIN ? "F" : "",
+ flags & TH_SYN ? "S" : "",
+ flags & TH_RST ? "R" : "",
+ flags & TH_PUSH ? "P" : "",
+ flags & TH_ACK ? "A" : "",
+ flags & TH_URG ? "U" : "",
+ flags ? " " : ""));
}
+
+ buf[0]='\0';
+ snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
+ (EXTRACT_16BITS(&nr->flags) >> 8) & 0xff,
+ (EXTRACT_16BITS(&nr->flags)) & 0xff);
ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
- EXTRACT_32BITS(&nr->proto_tos) & 0xff,
+ nr->tos,
EXTRACT_32BITS(&nr->packets),
EXTRACT_32BITS(&nr->octets), buf));
}
ND_PRINT((ndo, "[|cnfp]"));
return;
}
+
+void
+cnfp_print(netdissect_options *ndo, const u_char *cp)
+{
+ int ver;
+
+ /*
+ * First 2 bytes are the version number.
+ */
+ ND_TCHECK2(*cp, 2);
+ ver = EXTRACT_16BITS(cp);
+ switch (ver) {
+
+ case 1:
+ cnfp_v1_print(ndo, cp);
+ break;
+
+ case 5:
+ cnfp_v5_print(ndo, cp);
+ break;
+
+ case 6:
+ cnfp_v6_print(ndo, cp);
+ break;
+
+ default:
+ ND_PRINT((ndo, "NetFlow v%x", ver));
+ break;
+ }
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|cnfp]"));
+ return;
+}
projects / tcpdump / commitdiff
