/* 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. */ /* * Format: * Use the Header of Record (Packet) 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; * * Following with 802.11 header */ /* * Format: * The ERM Radio-Format has the above header, plus more, like this: * * struct radio_pcap_hdr { * struct timeval ts; * __u32 capture_length; * __u32 frame_length; * __u16 rate_per_half_mhz; * __u8 channel; * __u8 signal_percent; * } __attribute__ ((packed)); * * Following with 802.11 header */ #include "config.h" #include #include #include #include #define PROTO_SHORT_NAME "ARUBA_ERM" #define PROTO_LONG_NAME "ARUBA encapsulated remote mirroring" #define TYPE_PCAP 0 #define TYPE_PEEK 1 #define TYPE_AIRMAGNET 2 #define TYPE_PCAPPLUSRADIO 3 #define TYPE_PPI 4 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 (type 3)" }, { TYPE_PPI, "ppi (type 4)" }, { 0, NULL } }; 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; static gint aruba_erm_type = 0; static int proto_aruba_erm = -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 dissector_handle_t aruba_erm_handle; static dissector_handle_t ieee80211_handle; static dissector_handle_t peek_handle; static dissector_handle_t ppi_handle; static dissector_handle_t data_handle; 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 int dissect_aruba_erm_pcap_radio(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *aruba_erm_tree, gint offset) { proto_item *ti_data_rate; guint16 data_rate; data_rate = tvb_get_ntohs(tvb, offset); 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(aruba_erm_tree, hf_aruba_erm_channel, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_signal_strength, tvb, offset, 1, ENC_NA); offset += 1; return offset; } static void dissect_aruba_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *ti; proto_tree *aruba_erm_tree; tvbuff_t *eth_tvb; int offset = 0 ; 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); proto_item_append_text(ti, ": %s", val_to_str(aruba_erm_type, aruba_erm_type_vals, "Unknown")); aruba_erm_tree = proto_item_add_subtree(ti, ett_aruba_erm); switch(aruba_erm_type){ case TYPE_PCAP: offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset); proto_item_set_len(ti, offset); eth_tvb = tvb_new_subset_remaining(tvb, offset); call_dissector(ieee80211_handle, eth_tvb, pinfo, tree); break; case TYPE_PEEK: call_dissector(peek_handle, tvb, pinfo, tree); break; case TYPE_AIRMAGNET: /* Not (yet) supported launch data dissector */ proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_airmagnet, tvb, offset, -1); call_dissector(data_handle, tvb, pinfo, tree); break; case TYPE_PCAPPLUSRADIO: offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset); offset = dissect_aruba_erm_pcap_radio(tvb, pinfo, aruba_erm_tree, offset); proto_item_set_len(ti, offset); eth_tvb = tvb_new_subset_remaining(tvb, offset); call_dissector(ieee80211_handle, eth_tvb, pinfo, tree); break; case TYPE_PPI: call_dissector(ppi_handle, tvb, pinfo, tree); break; default: break; } } 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 }} }; static const enum_val_t aruba_erm_types[] = { { "pcap_type_0", "pcap (type 0)", TYPE_PCAP}, { "peek_type_1", "peek (type1)", 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} }; module_t *aruba_erm_module; expert_module_t* expert_aruba_erm; proto_aruba_erm = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "aruba_erm"); 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" " 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); 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); 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)); } 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) { ieee80211_handle = find_dissector("wlan_withoutfcs"); ppi_handle = find_dissector("ppi"); peek_handle = find_dissector("peekremote"); data_handle = find_dissector("data"); aruba_erm_handle = create_dissector_handle(dissect_aruba_erm, proto_aruba_erm); 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); } /* * 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: */