X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/9ed7ddb48fd557dc993e73f22a50dda6cedf4df7..HEAD:/print-cnfp.c diff --git a/print-cnfp.c b/print-cnfp.c index 9f3eefae..d5fd9d67 100644 --- a/print-cnfp.c +++ b/print-cnfp.c @@ -30,165 +30,389 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* Cisco NetFlow protocol */ +/* \summary: Cisco NetFlow protocol printer */ -#define NETDISSECT_REWORKED -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif +/* + * Cisco NetFlow protocol + * + * See + * + * https://www.cisco.com/c/en/us/td/docs/net_mgmt/netflow_collection_engine/3-6/user/guide/format.html#wp1005892 + */ -#include +#include -#include -#include +#include "netdissect-stdinc.h" -#include "interface.h" +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" #include "addrtoname.h" #include "extract.h" #include "tcp.h" #include "ipproto.h" -struct nfhdr { - uint32_t ver_cnt; /* version [15], and # of records */ - uint32_t msys_uptime; - uint32_t utc_sec; - uint32_t utc_nsec; - uint32_t sequence; /* v5 flow sequence number */ - uint32_t reserved; /* v5 only */ +struct nfhdr_v1 { + nd_uint16_t version; /* version number */ + nd_uint16_t count; /* # of records */ + nd_uint32_t msys_uptime; + nd_uint32_t utc_sec; + nd_uint32_t utc_nsec; }; -struct nfrec { - 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 */ - struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ +struct nfrec_v1 { + nd_ipv4 src_ina; + nd_ipv4 dst_ina; + nd_ipv4 nhop_ina; + nd_uint16_t input; /* SNMP index of input interface */ + nd_uint16_t output; /* SNMP index of output interface */ + nd_uint32_t packets; /* packets in the flow */ + nd_uint32_t octets; /* layer 3 octets in the packets of the flow */ + nd_uint32_t start_time; /* sys_uptime value at start of flow */ + nd_uint32_t last_time; /* sys_uptime value when last packet of flow was received */ + nd_uint16_t srcport; /* TCP/UDP source port or equivalent */ + nd_uint16_t dstport; /* TCP/UDP source port or equivalent */ + nd_byte pad1[2]; /* pad */ + nd_uint8_t proto; /* IP protocol type */ + nd_uint8_t tos; /* IP type of service */ + nd_uint8_t tcp_flags; /* cumulative OR of TCP flags */ + nd_byte pad[3]; /* padding */ + nd_uint32_t reserved; /* unused */ }; -void -cnfp_print(netdissect_options *ndo, const u_char *cp) +struct nfhdr_v5 { + nd_uint16_t version; /* version number */ + nd_uint16_t count; /* # of records */ + nd_uint32_t msys_uptime; + nd_uint32_t utc_sec; + nd_uint32_t utc_nsec; + nd_uint32_t sequence; /* flow sequence number */ + nd_uint8_t engine_type; /* type of flow-switching engine */ + nd_uint8_t engine_id; /* slot number of the flow-switching engine */ + nd_uint16_t sampling_interval; /* sampling mode and interval */ +}; + +struct nfrec_v5 { + nd_ipv4 src_ina; + nd_ipv4 dst_ina; + nd_ipv4 nhop_ina; + nd_uint16_t input; /* SNMP index of input interface */ + nd_uint16_t output; /* SNMP index of output interface */ + nd_uint32_t packets; /* packets in the flow */ + nd_uint32_t octets; /* layer 3 octets in the packets of the flow */ + nd_uint32_t start_time; /* sys_uptime value at start of flow */ + nd_uint32_t last_time; /* sys_uptime value when last packet of flow was received */ + nd_uint16_t srcport; /* TCP/UDP source port or equivalent */ + nd_uint16_t dstport; /* TCP/UDP source port or equivalent */ + nd_byte pad1; /* pad */ + nd_uint8_t tcp_flags; /* cumulative OR of TCP flags */ + nd_uint8_t proto; /* IP protocol type */ + nd_uint8_t tos; /* IP type of service */ + nd_uint16_t src_as; /* AS number of the source */ + nd_uint16_t dst_as; /* AS number of the destination */ + nd_uint8_t src_mask; /* source address mask bits */ + nd_uint8_t dst_mask; /* destination address prefix mask bits */ + nd_byte pad2[2]; + nd_ipv4 peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ +}; + +struct nfhdr_v6 { + nd_uint16_t version; /* version number */ + nd_uint16_t count; /* # of records */ + nd_uint32_t msys_uptime; + nd_uint32_t utc_sec; + nd_uint32_t utc_nsec; + nd_uint32_t sequence; /* v5 flow sequence number */ + nd_uint32_t reserved; /* v5 only */ +}; + +struct nfrec_v6 { + nd_ipv4 src_ina; + nd_ipv4 dst_ina; + nd_ipv4 nhop_ina; + nd_uint16_t input; /* SNMP index of input interface */ + nd_uint16_t output; /* SNMP index of output interface */ + nd_uint32_t packets; /* packets in the flow */ + nd_uint32_t octets; /* layer 3 octets in the packets of the flow */ + nd_uint32_t start_time; /* sys_uptime value at start of flow */ + nd_uint32_t last_time; /* sys_uptime value when last packet of flow was received */ + nd_uint16_t srcport; /* TCP/UDP source port or equivalent */ + nd_uint16_t dstport; /* TCP/UDP source port or equivalent */ + nd_byte pad1; /* pad */ + nd_uint8_t tcp_flags; /* cumulative OR of TCP flags */ + nd_uint8_t proto; /* IP protocol type */ + nd_uint8_t tos; /* IP type of service */ + nd_uint16_t src_as; /* AS number of the source */ + nd_uint16_t dst_as; /* AS number of the destination */ + nd_uint8_t src_mask; /* source address mask bits */ + nd_uint8_t dst_mask; /* destination address prefix mask bits */ + nd_uint16_t flags; + nd_ipv4 peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ +}; + +static void +cnfp_v1_print(netdissect_options *ndo, const u_char *cp) { - register const struct nfhdr *nh; - register const struct nfrec *nr; - struct protoent *pent; - int nrecs, ver; + const struct nfhdr_v1 *nh; + const struct nfrec_v1 *nr; + const char *p_name; + uint8_t proto; + u_int nrecs, ver; #if 0 time_t t; #endif - nh = (const struct nfhdr *)cp; - ND_TCHECK(*nh); + nh = (const struct nfhdr_v1 *)cp; - nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff; - ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16; + ver = GET_BE_U_2(nh->version); + nrecs = GET_BE_U_4(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); + t = GET_BE_U_4(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("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, + GET_BE_U_4(nh->msys_uptime)/1000, + GET_BE_U_4(nh->msys_uptime)%1000, + GET_BE_U_4(nh->utc_sec), GET_BE_U_4(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)); + ND_PRINT("%2u recs", nrecs); for (; nrecs != 0; nr++, nrecs--) { - char buf[20]; - char asbuf[20]; - - /* - * Make sure we have the entire record. - */ - if (ver == 5 || ver == 6) { - ND_TCHECK(nr->masks); - } else { - ND_TCHECK(nr->proto_tos); - } - 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'; - 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)); - - 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); + ND_PRINT("\n started %u.%03u, last %u.%03u", + GET_BE_U_4(nr->start_time)/1000, + GET_BE_U_4(nr->start_time)%1000, + GET_BE_U_4(nr->last_time)/1000, + GET_BE_U_4(nr->last_time)%1000); + + ND_PRINT("\n %s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + GET_BE_U_2(nr->srcport)); + + ND_PRINT("> %s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + GET_BE_U_2(nr->dstport)); + + ND_PRINT(">> %s\n ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina))); + + proto = GET_U_1(nr->proto); + if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL) + ND_PRINT("%s ", p_name); + else + ND_PRINT("%u ", proto); + + /* tcp flags for tcp only */ + if (proto == IPPROTO_TCP) { + u_int flags; + flags = GET_U_1(nr->tcp_flags); + if (flags) + ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags)); } - ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, - EXTRACT_32BITS(&nr->ports) & 0xffff)); - ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr))); + ND_PRINT("tos %u, %u (%u octets)", + GET_U_1(nr->tos), + GET_BE_U_4(nr->packets), + GET_BE_U_4(nr->octets)); + /* This was not all of struct nfrec_v1. */ + ND_TCHECK_SIZE(nr); + } +} + +static void +cnfp_v5_print(netdissect_options *ndo, const u_char *cp) +{ + const struct nfhdr_v5 *nh; + const struct nfrec_v5 *nr; + const char *p_name; + uint8_t proto; + u_int nrecs, ver; +#if 0 + time_t t; +#endif + + nh = (const struct nfhdr_v5 *)cp; + + ver = GET_BE_U_2(nh->version); + nrecs = GET_BE_U_4(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 = GET_BE_U_4(nh->utc_sec); +#endif + + ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, + GET_BE_U_4(nh->msys_uptime)/1000, + GET_BE_U_4(nh->msys_uptime)%1000, + GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec)); + + ND_PRINT("#%u, ", GET_BE_U_4(nh->sequence)); + /* This was not all of struct nfhdr_v5. */ + ND_TCHECK_SIZE(nh); + nr = (const struct nfrec_v5 *)&nh[1]; + + ND_PRINT("%2u recs", nrecs); + + for (; nrecs != 0; nr++, nrecs--) { + ND_PRINT("\n started %u.%03u, last %u.%03u", + GET_BE_U_4(nr->start_time)/1000, + GET_BE_U_4(nr->start_time)%1000, + GET_BE_U_4(nr->last_time)/1000, + GET_BE_U_4(nr->last_time)%1000); - pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); - if (!pent || ndo->ndo_nflag) - ND_PRINT((ndo, "%u ", - (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff)); + ND_PRINT("\n %s/%u:%u:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + GET_U_1(nr->src_mask), GET_BE_U_2(nr->src_as), + GET_BE_U_2(nr->srcport)); + + ND_PRINT("> %s/%u:%u:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + GET_U_1(nr->dst_mask), GET_BE_U_2(nr->dst_as), + GET_BE_U_2(nr->dstport)); + + ND_PRINT(">> %s\n ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina))); + + proto = GET_U_1(nr->proto); + if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL) + ND_PRINT("%s ", p_name); else - ND_PRINT((ndo, "%s ", pent->p_name)); + ND_PRINT("%u ", proto); /* 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; - 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 ? " " : "")); + if (proto == IPPROTO_TCP) { + u_int flags; + flags = GET_U_1(nr->tcp_flags); + if (flags) + ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags)); } - 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("tos %u, %u (%u octets)", + GET_U_1(nr->tos), + GET_BE_U_4(nr->packets), + GET_BE_U_4(nr->octets)); + /* This was not all of struct nfrec_v5. */ + ND_TCHECK_SIZE(nr); + } +} + +static void +cnfp_v6_print(netdissect_options *ndo, const u_char *cp) +{ + const struct nfhdr_v6 *nh; + const struct nfrec_v6 *nr; + const char *p_name; + uint8_t proto; + u_int nrecs, ver; +#if 0 + time_t t; +#endif + + nh = (const struct nfhdr_v6 *)cp; + + ver = GET_BE_U_2(nh->version); + nrecs = GET_BE_U_4(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 = GET_BE_U_4(nh->utc_sec); +#endif + + ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, + GET_BE_U_4(nh->msys_uptime)/1000, + GET_BE_U_4(nh->msys_uptime)%1000, + GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec)); + + ND_PRINT("#%u, ", GET_BE_U_4(nh->sequence)); + /* This was not all of struct nfhdr_v6. */ + ND_TCHECK_SIZE(nh); + nr = (const struct nfrec_v6 *)&nh[1]; + + ND_PRINT("%2u recs", nrecs); + + for (; nrecs != 0; nr++, nrecs--) { + ND_PRINT("\n started %u.%03u, last %u.%03u", + GET_BE_U_4(nr->start_time)/1000, + GET_BE_U_4(nr->start_time)%1000, + GET_BE_U_4(nr->last_time)/1000, + GET_BE_U_4(nr->last_time)%1000); + + ND_PRINT("\n %s/%u:%u:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + GET_U_1(nr->src_mask), GET_BE_U_2(nr->src_as), + GET_BE_U_2(nr->srcport)); + + ND_PRINT("> %s/%u:%u:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + GET_U_1(nr->dst_mask), GET_BE_U_2(nr->dst_as), + GET_BE_U_2(nr->dstport)); + + ND_PRINT(">> %s\n ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina))); + + proto = GET_U_1(nr->proto); + if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL) + ND_PRINT("%s ", p_name); + else + ND_PRINT("%u ", proto); + + /* tcp flags for tcp only */ + if (proto == IPPROTO_TCP) { + u_int flags; + flags = GET_U_1(nr->tcp_flags); + if (flags) + ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags)); } - ND_PRINT((ndo, "tos %u, %u (%u octets) %s", - EXTRACT_32BITS(&nr->proto_tos) & 0xff, - EXTRACT_32BITS(&nr->packets), - EXTRACT_32BITS(&nr->octets), buf)); + + ND_PRINT("tos %u, %u (%u octets) (%u<>%u encaps)", + GET_U_1(nr->tos), + GET_BE_U_4(nr->packets), + GET_BE_U_4(nr->octets), + (GET_BE_U_2(nr->flags) >> 8) & 0xff, + (GET_BE_U_2(nr->flags)) & 0xff); + /* This was not all of struct nfrec_v6. */ + ND_TCHECK_SIZE(nr); } - return; +} -trunc: - ND_PRINT((ndo, "[|cnfp]")); - return; +void +cnfp_print(netdissect_options *ndo, const u_char *cp) +{ + int ver; + + /* + * First 2 bytes are the version number. + */ + ndo->ndo_protocol = "cnfp"; + ver = GET_BE_U_2(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("NetFlow v%x", ver); + break; + } }