X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/c90e9360602c1a888ef3d56c7628d4609038d0c4..d7b497cac78b6e22a66a6bae9bdec60a8044f67a:/print-cnfp.c diff --git a/print-cnfp.c b/print-cnfp.c index 5cc19981..162b1f9f 100644 --- a/print-cnfp.c +++ b/print-cnfp.c @@ -30,155 +30,445 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* Cisco NetFlow protocol */ +/* \summary: Cisco NetFlow protocol printer */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.14 2003-06-07 11:57:52 guy Exp $"; -#endif +/* + * 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 + */ #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include #include #include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" #include "extract.h" #include "tcp.h" #include "ipproto.h" -struct nfhdr { - u_int32_t ver_cnt; /* version [15], and # of records */ - u_int32_t msys_uptime; - u_int32_t utc_sec; - u_int32_t utc_nsec; - u_int32_t sequence; /* v5 flow sequence number */ - u_int32_t reserved; /* v5 only */ +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 { +struct nfrec_v1 { struct in_addr src_ina; struct in_addr dst_ina; struct in_addr nhop_ina; - u_int32_t ifaces; /* src,dst ifaces */ - u_int32_t packets; - u_int32_t octets; - u_int32_t start_time; /* sys_uptime value */ - u_int32_t last_time; /* sys_uptime value */ - u_int32_t ports; /* src,dst ports */ - u_int32_t proto_tos; /* proto, tos, pad, flags(v5) */ - u_int32_t asses; /* v1: flags; v5: src,dst AS */ - u_int32_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 */ + 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)*/ }; -void -cnfp_print(const u_char *cp, const u_char *bp) +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 sequence; /* v5 flow sequence number */ + uint32_t reserved; /* v5 only */ +}; + +struct nfrec_v6 { + 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 flags; + struct in_addr 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; - register const struct ip *ip; - struct protoent *pent; + register const struct nfhdr_v1 *nh; + register const struct nfrec_v1 *nr; + const char *p_name; int nrecs, ver; +#if 0 time_t t; +#endif - ip = (const struct ip *)bp; - nh = (const struct nfhdr *)cp; - - if ((const u_char *)(nh + 1) > snapend) - return; - - nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff; - ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16; - t = EXTRACT_32BITS(&nh->utc_sec); -/* (p = ctime(&t))[24] = '\0'; */ - - printf("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)); - - if (ver == 5 || ver == 6) { - printf("#%u, ", EXTRACT_32BITS(&nh->sequence)); - nr = (const struct nfrec *)&nh[1]; - snaplen -= 24; - } else { - nr = (const struct nfrec *)&nh->sequence; - snaplen -= 16; - } + nh = (const struct nfhdr_v1 *)cp; + ND_TCHECK(*nh); + + ver = EXTRACT_BE_U_2(&nh->version); + nrecs = EXTRACT_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_BE_U_4(&nh->utc_sec); +#endif - printf("%2u recs", nrecs); + ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, + EXTRACT_BE_U_4(&nh->msys_uptime)/1000, + EXTRACT_BE_U_4(&nh->msys_uptime)%1000, + EXTRACT_BE_U_4(&nh->utc_sec), EXTRACT_BE_U_4(&nh->utc_nsec))); - for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) { + nr = (const struct nfrec_v1 *)&nh[1]; + + ND_PRINT((ndo, "%2u recs", nrecs)); + + for (; nrecs != 0; nr++, nrecs--) { char buf[20]; char asbuf[20]; - printf("\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); + /* + * Make sure we have the entire record. + */ + ND_TCHECK(*nr); + ND_PRINT((ndo, "\n started %u.%03u, last %u.%03u", + EXTRACT_BE_U_4(&nr->start_time)/1000, + EXTRACT_BE_U_4(&nr->start_time)%1000, + EXTRACT_BE_U_4(&nr->last_time)/1000, + EXTRACT_BE_U_4(&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); - } - printf("\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((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, + EXTRACT_BE_U_2(&nr->srcport))); + + ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, + EXTRACT_BE_U_2(&nr->dstport))); + + ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr))); + + if (!ndo->ndo_nflag && (p_name = netdb_protoname(nr->proto)) != NULL) + ND_PRINT((ndo, "%s ", p_name)); + else + ND_PRINT((ndo, "%u ", nr->proto)); + + /* tcp flags for tcp only */ + if (nr->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 ? " " : "")); } - printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, - EXTRACT_32BITS(&nr->ports) & 0xffff); - printf(">> %s\n ", intoa(nr->nhop_ina.s_addr)); + buf[0]='\0'; + ND_PRINT((ndo, "tos %u, %u (%u octets) %s", + nr->tos, + EXTRACT_BE_U_4(&nr->packets), + EXTRACT_BE_U_4(&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; + const char *p_name; + int nrecs, ver; +#if 0 + time_t t; +#endif + + nh = (const struct nfhdr_v5 *)cp; + ND_TCHECK(*nh); + + ver = EXTRACT_BE_U_2(&nh->version); + nrecs = EXTRACT_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_BE_U_4(&nh->utc_sec); +#endif + + ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, + EXTRACT_BE_U_4(&nh->msys_uptime)/1000, + EXTRACT_BE_U_4(&nh->msys_uptime)%1000, + EXTRACT_BE_U_4(&nh->utc_sec), EXTRACT_BE_U_4(&nh->utc_nsec))); + + ND_PRINT((ndo, "#%u, ", EXTRACT_BE_U_4(&nh->sequence))); + nr = (const struct nfrec_v5 *)&nh[1]; + + ND_PRINT((ndo, "%2u recs", nrecs)); - pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); - if (!pent || nflag) - printf("%u ", - (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); + 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_BE_U_4(&nr->start_time)/1000, + EXTRACT_BE_U_4(&nr->start_time)%1000, + EXTRACT_BE_U_4(&nr->last_time)/1000, + EXTRACT_BE_U_4(&nr->last_time)%1000)); + + asbuf[0] = buf[0] = '\0'; + snprintf(buf, sizeof(buf), "/%u", nr->src_mask); + snprintf(asbuf, sizeof(asbuf), ":%u", + EXTRACT_BE_U_2(&nr->src_as)); + ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, + EXTRACT_BE_U_2(&nr->srcport))); + + snprintf(buf, sizeof(buf), "/%d", nr->dst_mask); + snprintf(asbuf, sizeof(asbuf), ":%u", + EXTRACT_BE_U_2(&nr->dst_as)); + ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, + EXTRACT_BE_U_2(&nr->dstport))); + + ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr))); + + if (!ndo->ndo_nflag && (p_name = netdb_protoname(nr->proto)) != NULL) + ND_PRINT((ndo, "%s ", p_name)); else - printf("%s ", pent->p_name); + ND_PRINT((ndo, "%u ", nr->proto)); /* tcp flags for tcp only */ - if (pent && pent->p_proto == IPPROTO_TCP) { + if (nr->proto == IPPROTO_TCP) { int flags; - if (ver == 1) - flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff; - else - flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff; - if (flags & TH_FIN) putchar('F'); - if (flags & TH_SYN) putchar('S'); - if (flags & TH_RST) putchar('R'); - if (flags & TH_PUSH) putchar('P'); - if (flags & TH_ACK) putchar('A'); - if (flags & TH_URG) putchar('U'); - if (flags) - putchar(' '); + 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'; - 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_BE_U_4(&nr->packets), + EXTRACT_BE_U_4(&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; + const char *p_name; + int nrecs, ver; +#if 0 + time_t t; +#endif + + nh = (const struct nfhdr_v6 *)cp; + ND_TCHECK(*nh); + + ver = EXTRACT_BE_U_2(&nh->version); + nrecs = EXTRACT_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_BE_U_4(&nh->utc_sec); +#endif + + ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, + EXTRACT_BE_U_4(&nh->msys_uptime)/1000, + EXTRACT_BE_U_4(&nh->msys_uptime)%1000, + EXTRACT_BE_U_4(&nh->utc_sec), EXTRACT_BE_U_4(&nh->utc_nsec))); + + ND_PRINT((ndo, "#%u, ", EXTRACT_BE_U_4(&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_BE_U_4(&nr->start_time)/1000, + EXTRACT_BE_U_4(&nr->start_time)%1000, + EXTRACT_BE_U_4(&nr->last_time)/1000, + EXTRACT_BE_U_4(&nr->last_time)%1000)); + + asbuf[0] = buf[0] = '\0'; + snprintf(buf, sizeof(buf), "/%u", nr->src_mask); + snprintf(asbuf, sizeof(asbuf), ":%u", + EXTRACT_BE_U_2(&nr->src_as)); + ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, + EXTRACT_BE_U_2(&nr->srcport))); + + snprintf(buf, sizeof(buf), "/%d", nr->dst_mask); + snprintf(asbuf, sizeof(asbuf), ":%u", + EXTRACT_BE_U_2(&nr->dst_as)); + ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, + EXTRACT_BE_U_2(&nr->dstport))); + + ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr))); + + if (!ndo->ndo_nflag && (p_name = netdb_protoname(nr->proto)) != NULL) + ND_PRINT((ndo, "%s ", p_name)); + else + ND_PRINT((ndo, "%u ", nr->proto)); + + /* tcp flags for tcp only */ + if (nr->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 ? " " : "")); } - printf("tos %u, %u (%u octets) %s", - EXTRACT_32BITS(&nr->proto_tos) & 0xff, - EXTRACT_32BITS(&nr->packets), - EXTRACT_32BITS(&nr->octets), buf); + + buf[0]='\0'; + snprintf(buf, sizeof(buf), "(%u<>%u encaps)", + (EXTRACT_BE_U_2(&nr->flags) >> 8) & 0xff, + (EXTRACT_BE_U_2(&nr->flags)) & 0xff); + ND_PRINT((ndo, "tos %u, %u (%u octets) %s", + nr->tos, + EXTRACT_BE_U_4(&nr->packets), + EXTRACT_BE_U_4(&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_TCHECK_2(cp); + ver = EXTRACT_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((ndo, "NetFlow v%x", ver)); + break; + } + return; + +trunc: + ND_PRINT((ndo, "[|cnfp]")); + return; }