/* packet-aruba-erm.c * Routines for the disassembly of Aruba encapsulated remote mirroring frames * (Adapted from packet-hp-erm.c and packet-cisco-erspan.c) * * Copyright 2010 Alexis La Goutte * * ERM Radio-Format added by Hadriel Kaplan * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* * See * * http://community.arubanetworks.com/t5/Unified-Wired-Wireless-Access/Bug-in-ArubaOS-Packet-Capture/td-p/237984 * * http://kjspgd.net/?p=30 * * for more information. */ /* * Formats: * * Pcap (type 0): * * Payload contains a pcap record header: * * typedef struct pcaprec_hdr_s { * guint32 ts_sec; timestamp seconds * guint32 ts_usec; timestamp microseconds * guint32 incl_len; number of octets of packet saved in file * guint32 orig_len; actual length of packet * } pcaprec_hdr_t; * * followed by the packet data, starting with an 802.11 header. * * Peek (type 1): * * Payload contains a "Peek remote" packet, as supported by * EtherPeek/AiroPeek/OmniPeek. * * Airmagnet (type 2): * * Unknown payload format. * * Pcap + radio header (type 3): * * Payload contains a pcap record header, as per the above, followed * by a header with radio information: * * struct radio_hdr { * __u16 rate_per_half_mhz; * __u8 channel; * __u8 signal_percent; * } __attribute__ ((packed)); * * followed by the packet data, starting with an 802.11 header. * * PPI (type 4): * * Payload contains a PPI header followed by the packet data, starting * with an 802.11 header. * * Peek 11n/11ac (type 5): * * This is probably the "new" "Peek remote" format. The "Peek remote" * dissector should probably be able to distinguish this from type 1, * as the "new" format has a magic number in it. Given that there's * a heuristic "Peek remote new" dissector, those packets might * automatically be recognized without setting any preference whatsoever. */ #include "config.h" #include #include #include #include #include #define PROTO_SHORT_NAME "ARUBA_ERM" #define PROTO_LONG_NAME "Aruba Networks encapsulated remote mirroring" #define TYPE_PCAP 0 #define TYPE_PEEK 1 #define TYPE_AIRMAGNET 2 #define TYPE_PCAPPLUSRADIO 3 #define TYPE_PPI 4 #define IS_ARUBA 0x01 #if 0 static const value_string aruba_erm_type_vals[] = { { TYPE_PCAP, "pcap (type 0)" }, { TYPE_PEEK, "peek (type 1)" }, { TYPE_AIRMAGNET, "Airmagnet (type 2)" }, { TYPE_PCAPPLUSRADIO, "pcap + radio header (type 3)" }, { TYPE_PPI, "PPI (type 4)" }, { 0, NULL } }; #endif void proto_register_aruba_erm(void); void proto_reg_handoff_aruba_erm(void); void proto_reg_handoff_aruba_erm_radio(void); static range_t *global_aruba_erm_port_range; #if 0 static gint aruba_erm_type = 0; #endif static int proto_aruba_erm = -1; static int proto_aruba_erm_type0 = -1; static int proto_aruba_erm_type1 = -1; static int proto_aruba_erm_type2 = -1; static int proto_aruba_erm_type3 = -1; static int proto_aruba_erm_type4 = -1; static int proto_aruba_erm_type5 = -1; static int hf_aruba_erm_time = -1; static int hf_aruba_erm_incl_len = -1; static int hf_aruba_erm_orig_len = -1; static int hf_aruba_erm_data_rate = -1; static int hf_aruba_erm_data_rate_gen = -1; static int hf_aruba_erm_channel = -1; static int hf_aruba_erm_signal_strength = -1; static gint ett_aruba_erm = -1; static expert_field ei_aruba_erm_airmagnet = EI_INIT; static expert_field ei_aruba_erm_decode = EI_INIT; static dissector_handle_t aruba_erm_handle; static dissector_handle_t aruba_erm_handle_type0; static dissector_handle_t aruba_erm_handle_type1; static dissector_handle_t aruba_erm_handle_type2; static dissector_handle_t aruba_erm_handle_type3; static dissector_handle_t aruba_erm_handle_type4; static dissector_handle_t aruba_erm_handle_type5; static dissector_handle_t wlan_radio_handle; static dissector_handle_t wlan_withfcs_handle; static dissector_handle_t peek_handle; static dissector_handle_t ppi_handle; static dissector_table_t aruba_erm_subdissector_table; static int dissect_aruba_erm_pcap(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *aruba_erm_tree, gint offset) { nstime_t ts; ts.secs = tvb_get_ntohl(tvb, 0); ts.nsecs = tvb_get_ntohl(tvb,4)*1000; proto_tree_add_time(aruba_erm_tree, hf_aruba_erm_time, tvb, offset, 8,&ts); offset +=8; proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_incl_len, tvb, 8, 4, ENC_BIG_ENDIAN); offset +=4; proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_orig_len, tvb, 12, 4, ENC_BIG_ENDIAN); offset +=4; return offset; } static proto_tree * dissect_aruba_erm_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int *offset _U_) { proto_item *ti; proto_tree *aruba_erm_tree; col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME); col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME); ti = proto_tree_add_item(tree, proto_aruba_erm, tvb, 0, 0, ENC_NA); aruba_erm_tree = proto_item_add_subtree(ti, ett_aruba_erm); return aruba_erm_tree; } static int dissect_aruba_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; /* * Implement "Decode As", as Aruba ERM doesn't * have a unique identifier to determine subdissector */ if (!dissector_try_uint(aruba_erm_subdissector_table, 0, tvb, pinfo, tree)) { dissect_aruba_erm_common(tvb, pinfo, tree, &offset); /* Add Expert info how decode...*/ proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_decode, tvb, offset, -1); call_data_dissector(tvb, pinfo, tree); } return tvb_captured_length(tvb); } static int dissect_aruba_erm_type0(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { tvbuff_t * next_tvb; int offset = 0; proto_tree *aruba_erm_tree; aruba_erm_tree = dissect_aruba_erm_common(tvb, pinfo, tree, &offset); offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset); proto_item_set_len(aruba_erm_tree, offset); next_tvb = tvb_new_subset_remaining(tvb, offset); /* No way to determine if TX or RX packet... (TX = no FCS, RX = FCS...)*/ call_dissector(wlan_withfcs_handle, next_tvb, pinfo, tree); return tvb_captured_length(tvb); } static int dissect_aruba_erm_type1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; dissect_aruba_erm_common(tvb, pinfo, tree, &offset); /* Say to PEEK dissector, it is a Aruba PEEK packet */ call_dissector_with_data(peek_handle, tvb, pinfo, tree, GUINT_TO_POINTER(IS_ARUBA)); return tvb_captured_length(tvb); } static int dissect_aruba_erm_type2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; dissect_aruba_erm_common(tvb, pinfo, tree, &offset); /* Not (yet) supported launch data dissector */ proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_airmagnet, tvb, offset, -1); call_data_dissector(tvb, pinfo, tree); return tvb_captured_length(tvb); } static int dissect_aruba_erm_type3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { tvbuff_t * next_tvb; int offset = 0; proto_tree *aruba_erm_tree; struct ieee_802_11_phdr phdr; guint32 signal_strength; proto_item *ti_data_rate; guint16 data_rate; guint channel; aruba_erm_tree = dissect_aruba_erm_common(tvb, pinfo, tree, &offset); offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset); memset(&phdr, 0, sizeof(phdr)); phdr.decrypted = FALSE; phdr.datapad = FALSE; phdr.phy = PHDR_802_11_PHY_UNKNOWN; phdr.has_data_rate = TRUE; data_rate = tvb_get_ntohs(tvb, offset); phdr.data_rate = data_rate; proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_data_rate, tvb, offset, 2, ENC_BIG_ENDIAN); ti_data_rate = proto_tree_add_float_format(aruba_erm_tree, hf_aruba_erm_data_rate_gen, tvb, 16, 2, (float)data_rate / 2, "Data Rate: %.1f Mb/s", (float)data_rate / 2); PROTO_ITEM_SET_GENERATED(ti_data_rate); offset += 2; proto_tree_add_item_ret_uint(aruba_erm_tree, hf_aruba_erm_channel, tvb, offset, 1, ENC_BIG_ENDIAN, &channel); phdr.has_channel = TRUE; phdr.channel = channel; offset += 1; proto_tree_add_item_ret_uint(aruba_erm_tree, hf_aruba_erm_signal_strength, tvb, offset, 1, ENC_BIG_ENDIAN, &signal_strength); phdr.has_signal_percent = TRUE; phdr.signal_percent = signal_strength; offset += 1; proto_item_set_len(aruba_erm_tree, offset); next_tvb = tvb_new_subset_remaining(tvb, offset); if(signal_strength == 100){ /* When signal = 100 %, it is TX packet and there is no FCS */ phdr.fcs_len = 0; /* TX packet, no FCS */ } else { phdr.fcs_len = 4; /* We have an FCS */ } call_dissector_with_data(wlan_radio_handle, next_tvb, pinfo, tree, &phdr); return tvb_captured_length(tvb); } static int dissect_aruba_erm_type4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; dissect_aruba_erm_common(tvb, pinfo, tree, &offset); call_dissector(ppi_handle, tvb, pinfo, tree); return tvb_captured_length(tvb); } /* Type 5 is the same of type 1 but with Peek Header version = 2, named internaly Peekremote -ng */ static int dissect_aruba_erm_type5(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; dissect_aruba_erm_common(tvb, pinfo, tree, &offset); /* Say to PEEK dissector, it is a Aruba PEEK packet */ call_dissector_with_data(peek_handle, tvb, pinfo, tree, GUINT_TO_POINTER(IS_ARUBA)); return tvb_captured_length(tvb); } static void aruba_erm_prompt(packet_info *pinfo _U_, gchar* result) { g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Aruba ERM payload as"); } static gpointer aruba_erm_value(packet_info *pinfo _U_) { return NULL; } void proto_register_aruba_erm(void) { static hf_register_info hf[] = { { &hf_aruba_erm_time, { "Packet Capture Timestamp", "aruba_erm.time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x00, NULL, HFILL }}, { &hf_aruba_erm_incl_len, { "Packet Captured Length", "aruba_erm.incl_len", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_aruba_erm_orig_len, { "Packet Length", "aruba_erm.orig_len", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL }}, { &hf_aruba_erm_data_rate, { "Data Rate", "aruba_erm.data_rate", FT_UINT16, BASE_DEC, NULL, 0x00, "Data rate (1/2 Mb/s)", HFILL }}, { &hf_aruba_erm_data_rate_gen, { "Data Rate", "aruba_erm.data_rate_gen", FT_FLOAT, BASE_NONE, NULL, 0x00, "Data rate (1/2 Mb/s)", HFILL }}, { &hf_aruba_erm_channel, { "Channel", "aruba_erm.channel", FT_UINT8, BASE_DEC, NULL, 0x00, "802.11 channel number that this frame was sent/received on", HFILL }}, { &hf_aruba_erm_signal_strength, { "Signal Strength [percent]", "aruba_erm.signal_strength", FT_UINT8, BASE_DEC, NULL, 0x00, "Signal strength (Percentage)", HFILL }}, }; /* both formats share the same tree */ static gint *ett[] = { &ett_aruba_erm, }; static ei_register_info ei[] = { { &ei_aruba_erm_airmagnet, { "aruba_erm.airmagnet", PI_UNDECODED, PI_ERROR, "Airmagnet (type 2) is no yet supported (Please use other type)", EXPFILL }}, { &ei_aruba_erm_decode, { "aruba_erm.decode", PI_UNDECODED, PI_NOTE, "Use Decode AS (Aruba ERM Type) for decoding payload", EXPFILL }} }; #if 0 static const enum_val_t aruba_erm_types[] = { { "pcap_type_0", "pcap (type 0)", TYPE_PCAP}, { "peek_type_1", "peek (type 1)", TYPE_PEEK}, { "airmagnet_type_2", "Airmagnet (type 2)", TYPE_AIRMAGNET}, { "pcapplusradio_type_3", "pcap + radio header (type 3)", TYPE_PCAPPLUSRADIO}, { "ppi_type_4", "PPI (type 4)", TYPE_PPI}, { NULL, NULL, -1} }; #endif module_t *aruba_erm_module; /* Decode As handling */ static build_valid_func aruba_erm_payload_da_build_value[1] = {aruba_erm_value}; static decode_as_value_t aruba_erm_payload_da_values = {aruba_erm_prompt, 1, aruba_erm_payload_da_build_value}; static decode_as_t aruba_erm_payload_da = { "aruba_erm", "Aruba ERM Type", "aruba_erm.type", 1, 0, &aruba_erm_payload_da_values, NULL, NULL, decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL, }; expert_module_t* expert_aruba_erm; proto_aruba_erm = proto_register_protocol(PROTO_LONG_NAME, "ARUBA_ERM" , "aruba_erm"); proto_aruba_erm_type0 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PCAP (Type 0)", "ARUBA ERM PCAP (Type 0)", "aruba_erm_type0"); proto_aruba_erm_type1 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PEEK (Type 1)", "ARUBA ERM PEEK (type 1)", "aruba_erm_type1"); proto_aruba_erm_type2 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - AIRMAGNET (Type 2)", "ARUBA ERM AIRMAGNET (Type 2)", "aruba_erm_type2"); proto_aruba_erm_type3 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PCAP+RADIO (Type 3)", "ARUBA ERM PCAP+RADIO (Type 3)", "aruba_erm_type3"); proto_aruba_erm_type4 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PPI (Type 4)", "ARUBA ERM PPI (Type 4)", "aruba_erm_type4"); proto_aruba_erm_type5 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PEEK (Type 5)", "ARUBA ERM PEEK-NG (type 5)", "aruba_erm_type5"); range_convert_str (&global_aruba_erm_port_range, "0", MAX_UDP_PORT); aruba_erm_module = prefs_register_protocol(proto_aruba_erm, proto_reg_handoff_aruba_erm); prefs_register_range_preference(aruba_erm_module, "udp.ports", "ARUBA_ERM UDP Port numbers", "Set the UDP port numbers (typically the range 5555 to 5560) used for Aruba Networks" " encapsulated remote mirroring frames;\n" "0 (default) means that the ARUBA_ERM dissector is not active\n", &global_aruba_erm_port_range, MAX_UDP_PORT); #if 0 /* Obso...*/ prefs_register_enum_preference(aruba_erm_module, "type.captured", "Type of formats for captured packets", "Type of formats for captured packets", &aruba_erm_type, aruba_erm_types, FALSE); #endif prefs_register_obsolete_preference(aruba_erm_module, "type.captured"); proto_register_field_array(proto_aruba_erm, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_aruba_erm = expert_register_protocol(proto_aruba_erm); expert_register_field_array(expert_aruba_erm, ei, array_length(ei)); aruba_erm_subdissector_table = register_dissector_table( "aruba_erm.type", "Aruba ERM Type", proto_aruba_erm, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE); register_decode_as(&aruba_erm_payload_da); } void proto_reg_handoff_aruba_erm(void) { static range_t *aruba_erm_port_range; static range_t *aruba_erm_radio_port_range; static gboolean initialized = FALSE; if (!initialized) { wlan_radio_handle = find_dissector_add_dependency("wlan_radio", proto_aruba_erm); wlan_withfcs_handle = find_dissector_add_dependency("wlan_withfcs", proto_aruba_erm); ppi_handle = find_dissector_add_dependency("ppi", proto_aruba_erm); peek_handle = find_dissector_add_dependency("peekremote", proto_aruba_erm); aruba_erm_handle = create_dissector_handle(dissect_aruba_erm, proto_aruba_erm); aruba_erm_handle_type0 = create_dissector_handle(dissect_aruba_erm_type0, proto_aruba_erm_type0); aruba_erm_handle_type1 = create_dissector_handle(dissect_aruba_erm_type1, proto_aruba_erm_type1); aruba_erm_handle_type2 = create_dissector_handle(dissect_aruba_erm_type2, proto_aruba_erm_type2); aruba_erm_handle_type3 = create_dissector_handle(dissect_aruba_erm_type3, proto_aruba_erm_type3); aruba_erm_handle_type4 = create_dissector_handle(dissect_aruba_erm_type4, proto_aruba_erm_type4); aruba_erm_handle_type5 = create_dissector_handle(dissect_aruba_erm_type5, proto_aruba_erm_type5); initialized = TRUE; } else { dissector_delete_uint_range("udp.port", aruba_erm_port_range, aruba_erm_handle); g_free(aruba_erm_port_range); g_free(aruba_erm_radio_port_range); } aruba_erm_port_range = range_copy(global_aruba_erm_port_range); dissector_add_uint_range("udp.port", aruba_erm_port_range, aruba_erm_handle); dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type0); dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type1); dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type2); dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type3); dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type4); dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type5); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */