diff options
Diffstat (limited to 'contrib/tcpdump/print-cnfp.c')
| -rw-r--r-- | contrib/tcpdump/print-cnfp.c | 405 |
1 files changed, 347 insertions, 58 deletions
diff --git a/contrib/tcpdump/print-cnfp.c b/contrib/tcpdump/print-cnfp.c index 07c940cbc242..d80d7fd27442 100644 --- a/contrib/tcpdump/print-cnfp.c +++ b/contrib/tcpdump/print-cnfp.c @@ -30,7 +30,13 @@ * 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 @@ -49,8 +55,73 @@ #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; @@ -58,41 +129,46 @@ struct nfhdr { 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, const u_char *bp _U_) +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; - - if ((const u_char *)(nh + 1) > ndo->ndo_snapend) - return; + 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 @@ -107,21 +183,18 @@ cnfp_print(netdissect_options *ndo, 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]; - ndo->ndo_snaplen -= 24; - } else { - nr = (const struct nfrec *)&nh->sequence; - ndo->ndo_snaplen -= 16; - } + nr = (const struct nfrec_v1 *)&nh[1]; ND_PRINT((ndo, "%2u recs", nrecs)); - for (; nrecs-- && (const u_char *)(nr + 1) <= ndo->ndo_snapend; nr++) { + 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, @@ -129,40 +202,121 @@ cnfp_print(netdissect_options *ndo, 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))); - 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); + 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'; + 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" : "", @@ -174,14 +328,149 @@ cnfp_print(netdissect_options *ndo, } 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)); } + 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. + */ + 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; } |