| /* $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; |
| } |
| } |