X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/10afb02ac804db7fa41a776fd61eff922c09c4df..HEAD:/print-cnfp.c?ds=inline diff --git a/print-cnfp.c b/print-cnfp.c index 94a05807..d5fd9d67 100644 --- a/print-cnfp.c +++ b/print-cnfp.c @@ -30,154 +30,389 @@ * 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 1.12 2002-11-09 17:19:25 itojun Exp $"; +/* + * 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 "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "addrtoname.h" +#include "extract.h" + +#include "tcp.h" +#include "ipproto.h" + +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_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 */ +}; + +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) +{ + 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 -#ifdef HAVE_CONFIG_H -#include "config.h" + nh = (const struct nfhdr_v1 *)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 -#include + 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)); -#include -#include + nr = (const struct nfrec_v1 *)&nh[1]; -#include "interface.h" + ND_PRINT("%2u recs", nrecs); -#include "addrtoname.h" + 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); -#include "tcp.h" + ND_PRINT("\n %s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + GET_BE_U_2(nr->srcport)); -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 */ -} __attribute__((packed)); - -struct nfrec { - 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 */ - struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ -} __attribute__((packed)); + ND_PRINT("> %s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + GET_BE_U_2(nr->dstport)); -void -cnfp_print(const u_char *cp, const u_char *bp) + 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("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) { - register const struct nfhdr *nh; - register const struct nfrec *nr; - register const struct ip *ip; - struct protoent *pent; - int nrecs, ver; + 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 - ip = (const struct ip *)bp; - nh = (const struct nfhdr *)cp; - - if ((const u_char *)(nh + 1) > snapend) - return; - - nrecs = ntohl(nh->ver_cnt) & 0xffff; - ver = (ntohl(nh->ver_cnt) & 0xffff0000) >> 16; - t = ntohl(nh->utc_sec); -/* (p = ctime(&t))[24] = '\0'; */ - - printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, - (unsigned)ntohl(nh->msys_uptime)/1000, - (unsigned)ntohl(nh->msys_uptime)%1000, - (unsigned)ntohl(nh->utc_sec), (unsigned)ntohl(nh->utc_nsec)); - - if (ver == 5 || ver == 6) { - printf("#%u, ", (unsigned)htonl(nh->sequence)); - nr = (const struct nfrec *)&nh[1]; - snaplen -= 24; - } else { - nr = (const struct nfrec *)&nh->sequence; - snaplen -= 16; - } + nh = (const struct nfhdr_v5 *)cp; - printf("%2u recs", nrecs); + 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 - for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) { - char buf[20]; - char asbuf[20]; + 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)); - printf("\n started %u.%03u, last %u.%03u", - (unsigned)ntohl(nr->start_time)/1000, - (unsigned)ntohl(nr->start_time)%1000, - (unsigned)ntohl(nr->last_time)/1000, - (unsigned)ntohl(nr->last_time)%1000); + 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]; - asbuf[0] = buf[0] = '\0'; - if (ver == 5 || ver == 6) { - snprintf(buf, sizeof(buf), "/%u", - (unsigned)(ntohl(nr->masks) >> 24) & 0xff); - snprintf(asbuf, sizeof(asbuf), ":%u", - (unsigned)(ntohl(nr->asses) >> 16) & 0xffff); - } - printf("\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, - (unsigned)ntohl(nr->ports) >> 16); - - if (ver == 5 || ver ==6) { - snprintf(buf, sizeof(buf), "/%d", - (unsigned)(ntohl(nr->masks) >> 16) & 0xff); - snprintf(asbuf, sizeof(asbuf), ":%u", - (unsigned)ntohl(nr->asses) & 0xffff); - } - printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, - (unsigned)ntohl(nr->ports) & 0xffff); + 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)); - printf(">> %s\n ", intoa(nr->nhop_ina.s_addr)); + 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)); - pent = getprotobynumber((ntohl(nr->proto_tos) >> 8) & 0xff); - if (!pent || nflag) - printf("%u ", - (unsigned)(ntohl(nr->proto_tos) >> 8) & 0xff); + 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 - printf("%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 = (ntohl(nr->asses) >> 24) & 0xff; - else - flags = (ntohl(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 (proto == IPPROTO_TCP) { + u_int flags; + flags = GET_U_1(nr->tcp_flags); if (flags) - putchar(' '); + ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags)); } - buf[0]='\0'; - if (ver == 6) { - snprintf(buf, sizeof(buf), "(%u<>%u encaps)", - (unsigned)(ntohl(nr->masks) >> 8) & 0xff, - (unsigned)(ntohl(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)); } - printf("tos %u, %u (%u octets) %s", - (unsigned)ntohl(nr->proto_tos) & 0xff, - (unsigned)ntohl(nr->packets), - (unsigned)ntohl(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); + } +} + +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; } }