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Diffstat (limited to '')
| -rw-r--r-- | print-cnfp.c | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/print-cnfp.c b/print-cnfp.c new file mode 100644 index 0000000..101148f --- /dev/null +++ b/print-cnfp.c @@ -0,0 +1,486 @@ +/* $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $ */ + +/* + * Copyright (c) 1998 Michael Shalayeff + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Michael Shalayeff. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* \summary: Cisco NetFlow protocol printer */ + +/* + * 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 + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#include <stdio.h> + +#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 + + nh = (const struct nfhdr_v1 *)cp; + ND_TCHECK_SIZE(nh); + + 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)); + + nr = (const struct nfrec_v1 *)&nh[1]; + + ND_PRINT("%2u recs", nrecs); + + for (; nrecs != 0; nr++, nrecs--) { + char buf[20]; + char asbuf[20]; + + /* + * Make sure we have the entire record. + */ + ND_TCHECK_SIZE(nr); + 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); + + asbuf[0] = buf[0] = '\0'; + ND_PRINT("\n %s%s%s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + buf, asbuf, + GET_BE_U_2(nr->srcport)); + + ND_PRINT("> %s%s%s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + buf, asbuf, + 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); + ND_PRINT("%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("tos %u, %u (%u octets) %s", + GET_U_1(nr->tos), + GET_BE_U_4(nr->packets), + GET_BE_U_4(nr->octets), buf); + } + return; + +trunc: + nd_print_trunc(ndo); +} + +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; + ND_TCHECK_SIZE(nh); + + 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)); + nr = (const struct nfrec_v5 *)&nh[1]; + + ND_PRINT("%2u recs", nrecs); + + for (; nrecs != 0; nr++, nrecs--) { + char buf[20]; + char asbuf[20]; + + /* + * Make sure we have the entire record. + */ + ND_TCHECK_SIZE(nr); + 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); + + asbuf[0] = buf[0] = '\0'; + snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->src_mask)); + snprintf(asbuf, sizeof(asbuf), ":%u", + GET_BE_U_2(nr->src_as)); + ND_PRINT("\n %s%s%s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + buf, asbuf, + GET_BE_U_2(nr->srcport)); + + snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->dst_mask)); + snprintf(asbuf, sizeof(asbuf), ":%u", + GET_BE_U_2(nr->dst_as)); + ND_PRINT("> %s%s%s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + buf, asbuf, + 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); + ND_PRINT("%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("tos %u, %u (%u octets) %s", + GET_U_1(nr->tos), + GET_BE_U_4(nr->packets), + GET_BE_U_4(nr->octets), buf); + } + return; + +trunc: + nd_print_trunc(ndo); +} + +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; + ND_TCHECK_SIZE(nh); + + 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)); + nr = (const struct nfrec_v6 *)&nh[1]; + + ND_PRINT("%2u recs", nrecs); + + for (; nrecs != 0; nr++, nrecs--) { + char buf[20]; + char asbuf[20]; + + /* + * Make sure we have the entire record. + */ + ND_TCHECK_SIZE(nr); + 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); + + asbuf[0] = buf[0] = '\0'; + snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->src_mask)); + snprintf(asbuf, sizeof(asbuf), ":%u", + GET_BE_U_2(nr->src_as)); + ND_PRINT("\n %s%s%s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)), + buf, asbuf, + GET_BE_U_2(nr->srcport)); + + snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->dst_mask)); + snprintf(asbuf, sizeof(asbuf), ":%u", + GET_BE_U_2(nr->dst_as)); + ND_PRINT("> %s%s%s:%u ", + intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)), + buf, asbuf, + 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); + ND_PRINT("%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)", + (GET_BE_U_2(nr->flags) >> 8) & 0xff, + (GET_BE_U_2(nr->flags)) & 0xff); + ND_PRINT("tos %u, %u (%u octets) %s", + GET_U_1(nr->tos), + GET_BE_U_4(nr->packets), + GET_BE_U_4(nr->octets), buf); + } + return; + +trunc: + nd_print_trunc(ndo); +} + +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; + } +} |