Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 492 insertions, 0 deletions

diff --git a/epan/dissectors/packet-btavctp.c b/epan/dissectors/packet-btavctp.c
new file mode 100644
index 00000000..18aae017
--- /dev/null
+++ b/epan/dissectors/packet-btavctp.c
@@ -0,0 +1,492 @@
+/* packet-btavctp.c
+ * Routines for Bluetooth AVCTP dissection
+ *
+ * Copyright 2012, Michal Labedzki for Tieto Corporation
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/expert.h>
+#include <epan/decode_as.h>
+#include <epan/proto_data.h>
+
+#include "packet-bluetooth.h"
+#include "packet-btl2cap.h"
+#include "packet-btsdp.h"
+#include "packet-btavctp.h"
+
+#define PACKET_TYPE_SINGLE    0x00
+#define PACKET_TYPE_START     0x01
+#define PACKET_TYPE_CONTINUE  0x02
+#define PACKET_TYPE_END       0x03
+
+int proto_btavctp = -1;
+
+static int hf_btavctp_transaction               = -1;
+static int hf_btavctp_packet_type               = -1;
+static int hf_btavctp_cr                        = -1;
+static int hf_btavctp_ipid                      = -1;
+static int hf_btavctp_rfa                       = -1;
+static int hf_btavctp_pid                       = -1;
+static int hf_btavctp_number_of_packets         = -1;
+
+static gint ett_btavctp             = -1;
+
+static expert_field ei_btavctp_unexpected_frame = EI_INIT;
+static expert_field ei_btavctp_invalid_profile = EI_INIT;
+
+static dissector_handle_t btavctp_handle;
+
+typedef struct _fragment_t {
+    guint   length;
+    guint8  *data;
+} fragment_t;
+
+typedef struct _fragments_t {
+    guint32      interface_id;
+    guint32      adapter_id;
+    guint32      chandle;
+    guint32      psm;
+    guint32      count;
+    guint32      number_of_packets;
+    guint32      pid;
+    wmem_tree_t  *fragment;
+} fragments_t;
+
+static wmem_tree_t *reassembling = NULL;
+static fragments_t *fragments    = NULL;
+
+static const value_string packet_type_vals[] = {
+    { PACKET_TYPE_SINGLE,   "Single" },
+    { PACKET_TYPE_START,    "Start" },
+    { PACKET_TYPE_CONTINUE, "Continue" },
+    { PACKET_TYPE_END,      "End" },
+    { 0, NULL }
+};
+
+static const value_string cr_vals[] = {
+    { 0x00,   "Command" },
+    { 0x01,   "Response" },
+    { 0, NULL }
+};
+
+static const value_string ipid_vals[] = {
+    { 0x00,   "Profile OK" },
+    { 0x01,   "Invalid profile" },
+    { 0, NULL }
+};
+
+void proto_register_btavctp(void);
+void proto_reg_handoff_btavctp(void);
+
+static gint
+dissect_btavctp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+    proto_item      *ti;
+    proto_tree      *btavctp_tree;
+    proto_item      *pitem;
+    proto_item      *ipid_item = NULL;
+    btavctp_data_t  *avctp_data;
+    tvbuff_t        *next_tvb;
+    gint            offset = 0;
+    guint           packet_type;
+    guint           cr;
+    guint           pid = 0;
+    guint           transaction;
+    guint           number_of_packets = 0;
+    guint           length;
+    guint           i_frame;
+    gboolean        ipid = FALSE;
+    guint32         interface_id;
+    guint32         adapter_id;
+    guint32         chandle;
+    guint32         psm;
+    gint            previous_proto;
+
+    previous_proto = (GPOINTER_TO_INT(wmem_list_frame_data(wmem_list_frame_prev(wmem_list_tail(pinfo->layers)))));
+    if (previous_proto == proto_btl2cap) {
+        btl2cap_data_t  *l2cap_data;
+
+        l2cap_data = (btl2cap_data_t *) data;
+
+        interface_id = l2cap_data->interface_id;
+        adapter_id   = l2cap_data->adapter_id;
+        chandle      = l2cap_data->chandle;
+        psm          = l2cap_data->psm;
+    } else {
+        interface_id = HCI_INTERFACE_DEFAULT;
+        adapter_id   = HCI_ADAPTER_DEFAULT;
+        chandle      = 0;
+        psm          = 0;
+    }
+
+    ti = proto_tree_add_item(tree, proto_btavctp, tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_NA);
+    btavctp_tree = proto_item_add_subtree(ti, ett_btavctp);
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "AVCTP");
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    switch (pinfo->p2p_dir) {
+        case P2P_DIR_SENT:
+            col_set_str(pinfo->cinfo, COL_INFO, "Sent ");
+            break;
+        case P2P_DIR_RECV:
+            col_set_str(pinfo->cinfo, COL_INFO, "Rcvd ");
+            break;
+        default:
+            col_set_str(pinfo->cinfo, COL_INFO, "UnknownDirection ");
+            break;
+    }
+
+    proto_tree_add_item(btavctp_tree, hf_btavctp_transaction,  tvb, offset, 1, ENC_BIG_ENDIAN);
+    pitem = proto_tree_add_item(btavctp_tree, hf_btavctp_packet_type,  tvb, offset, 1, ENC_BIG_ENDIAN);
+    proto_tree_add_item(btavctp_tree, hf_btavctp_cr,  tvb, offset, 1, ENC_BIG_ENDIAN);
+    transaction = tvb_get_guint8(tvb, offset) >> 4;
+    packet_type = (tvb_get_guint8(tvb, offset) & 0x0C) >> 2;
+    cr = (tvb_get_guint8(tvb, offset) & 0x02) >> 1 ;
+
+    if (packet_type == PACKET_TYPE_SINGLE || packet_type == PACKET_TYPE_START) {
+        ipid_item = proto_tree_add_item(btavctp_tree, hf_btavctp_ipid,  tvb, offset, 1, ENC_BIG_ENDIAN);
+        ipid = tvb_get_guint8(tvb, offset) & 0x01;
+    } else {
+        proto_tree_add_item(btavctp_tree, hf_btavctp_rfa,  tvb, offset, 1, ENC_BIG_ENDIAN);
+    }
+    offset++;
+
+    if (packet_type == PACKET_TYPE_START) {
+        proto_tree_add_item(btavctp_tree, hf_btavctp_number_of_packets,  tvb, offset, 1, ENC_BIG_ENDIAN);
+        number_of_packets = tvb_get_guint8(tvb, offset);
+        offset++;
+    }
+
+    if (packet_type == PACKET_TYPE_SINGLE || packet_type == PACKET_TYPE_START) {
+        proto_tree_add_item(btavctp_tree, hf_btavctp_pid,  tvb, offset, 2, ENC_BIG_ENDIAN);
+        pid = tvb_get_ntohs(tvb, offset);
+
+        if (p_get_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID ) == NULL) {
+            guint8 *value_data;
+            bluetooth_uuid_t  uuid;
+
+            uuid.size = 2;
+            uuid.bt_uuid = pid;
+            uuid.data[0] = pid >> 8;
+            uuid.data[1] = pid & 0xFF;
+
+            value_data = wmem_strdup(wmem_file_scope(), print_numeric_bluetooth_uuid(pinfo->pool, &uuid));
+
+            p_add_proto_data(pinfo->pool, pinfo, proto_bluetooth, PROTO_DATA_BLUETOOTH_SERVICE_UUID, value_data);
+        }
+        offset +=2;
+    }
+
+    col_append_fstr(pinfo->cinfo, COL_INFO, "%s - Transaction: %u, PacketType: %s",
+            val_to_str_const(cr, cr_vals, "unknown CR"), transaction,
+            val_to_str_const(packet_type, packet_type_vals, "unknown packet type"));
+
+    if (ipid) {
+        expert_add_info(pinfo, ipid_item, &ei_btavctp_invalid_profile);
+        col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Invalid profile");
+        if (tvb_captured_length_remaining(tvb, offset) == 0)
+            return offset;
+    }
+
+    avctp_data = wmem_new(pinfo->pool, btavctp_data_t);
+    avctp_data->cr           = cr;
+    avctp_data->interface_id = interface_id;
+    avctp_data->adapter_id   = adapter_id;
+    avctp_data->chandle      = chandle;
+    avctp_data->psm          = psm;
+
+    length = tvb_reported_length_remaining(tvb, offset);
+
+    /* reassembling */
+    next_tvb = tvb_new_subset_length(tvb, offset, length);
+    if (packet_type == PACKET_TYPE_SINGLE) {
+        bluetooth_uuid_t  uuid;
+
+        uuid.size = 2;
+        uuid.bt_uuid = pid;
+        uuid.data[0] = pid >> 8;
+        uuid.data[1] = pid & 0xFF;
+
+        if (!dissector_try_string(bluetooth_uuid_table, print_numeric_bluetooth_uuid(pinfo->pool, &uuid), next_tvb, pinfo, tree, avctp_data)) {
+            call_data_dissector(next_tvb, pinfo, tree);
+        }
+
+    } else {
+        fragment_t     *fragment;
+        wmem_tree_key_t key[6];
+        guint32         frame_number;
+
+        frame_number = pinfo->num;
+
+        key[0].length = 1;
+        key[0].key = &interface_id;
+        key[1].length = 1;
+        key[1].key = &adapter_id;
+        key[2].length = 1;
+        key[2].key = &chandle;
+        key[3].length = 1;
+        key[3].key = &psm;
+        key[4].length = 1;
+        key[4].key = &frame_number;
+        key[5].length = 0;
+        key[5].key = NULL;
+
+        if (packet_type == PACKET_TYPE_START) {
+            if (!pinfo->fd->visited) {
+                fragment = wmem_new(wmem_file_scope(), fragment_t);
+                fragment->length = length;
+                fragment->data = (guint8 *) wmem_alloc(wmem_file_scope(), fragment->length);
+                tvb_memcpy(tvb, fragment->data, offset, fragment->length);
+
+                fragments = wmem_new(wmem_file_scope(), fragments_t);
+                fragments->number_of_packets = number_of_packets;
+                fragments->pid = pid;
+
+                fragments->count = 1;
+                fragments->fragment = wmem_tree_new(wmem_file_scope());
+                wmem_tree_insert32(fragments->fragment, fragments->count, fragment);
+
+                fragments->interface_id = interface_id;
+                fragments->adapter_id   = adapter_id;
+                fragments->chandle      = chandle;
+                fragments->psm          = psm;
+
+                wmem_tree_insert32_array(reassembling, key, fragments);
+
+            } else {
+                fragments = (fragments_t *)wmem_tree_lookup32_array_le(reassembling, key);
+                if (!(fragments && fragments->interface_id == interface_id &&
+                        fragments->adapter_id == adapter_id &&
+                        fragments->chandle == chandle &&
+                        fragments->psm == psm))
+                    fragments = NULL;
+            }
+
+            call_data_dissector(next_tvb, pinfo, tree);
+
+        } else if (packet_type == PACKET_TYPE_CONTINUE) {
+            fragments = (fragments_t *)wmem_tree_lookup32_array_le(reassembling, key);
+            if (!(fragments && fragments->interface_id == interface_id &&
+                    fragments->adapter_id == adapter_id &&
+                    fragments->chandle == chandle &&
+                    fragments->psm == psm))
+                fragments = NULL;
+
+            if (!pinfo->fd->visited && fragments != NULL) {
+                fragment = wmem_new(wmem_file_scope(), fragment_t);
+                fragment->length = length;
+                fragment->data = (guint8 *) wmem_alloc(wmem_file_scope(), fragment->length);
+                tvb_memcpy(tvb, fragment->data, offset, fragment->length);
+
+                fragments->count++;
+                wmem_tree_insert32(fragments->fragment, fragments->count, fragment);
+
+                fragments->interface_id = interface_id;
+                fragments->adapter_id   = adapter_id;
+                fragments->chandle      = chandle;
+                fragments->psm          = psm;
+
+                frame_number = pinfo->num;
+
+                key[0].length = 1;
+                key[0].key = &interface_id;
+                key[1].length = 1;
+                key[1].key = &adapter_id;
+                key[2].length = 1;
+                key[2].key = &chandle;
+                key[3].length = 1;
+                key[3].key = &psm;
+                key[4].length = 1;
+                key[4].key = &frame_number;
+                key[5].length = 0;
+                key[5].key = NULL;
+
+                wmem_tree_insert32_array(reassembling, key, fragments);
+            }
+
+            call_data_dissector(next_tvb, pinfo, tree);
+
+        } else if (packet_type == PACKET_TYPE_END) {
+
+            fragments = (fragments_t *)wmem_tree_lookup32_array_le(reassembling, key);
+            if (!(fragments && fragments->interface_id == interface_id &&
+                    fragments->adapter_id == adapter_id &&
+                    fragments->chandle == chandle &&
+                    fragments->psm == psm))
+                fragments = NULL;
+
+            if (!pinfo->fd->visited && fragments != NULL) {
+                fragment = wmem_new(wmem_file_scope(), fragment_t);
+                fragment->length = length;
+                fragment->data = (guint8 *) wmem_alloc(wmem_file_scope(), fragment->length);
+                tvb_memcpy(tvb, fragment->data, offset, fragment->length);
+
+                fragments->count++;
+                wmem_tree_insert32(fragments->fragment, fragments->count, fragment);
+
+                fragments->interface_id = interface_id;
+                fragments->adapter_id   = adapter_id;
+                fragments->chandle      = chandle;
+                fragments->psm          = psm;
+
+                frame_number = pinfo->num;
+
+                key[0].length = 1;
+                key[0].key = &interface_id;
+                key[1].length = 1;
+                key[1].key = &adapter_id;
+                key[2].length = 1;
+                key[2].key = &chandle;
+                key[3].length = 1;
+                key[3].key = &psm;
+                key[4].length = 1;
+                key[4].key = &frame_number;
+                key[5].length = 0;
+                key[5].key = NULL;
+
+                wmem_tree_insert32_array(reassembling, key, fragments);
+            }
+
+            length = 0;
+            if (!fragments || fragments->count != fragments->number_of_packets) {
+                expert_add_info(pinfo, pitem, &ei_btavctp_unexpected_frame);
+                call_data_dissector(next_tvb, pinfo, tree);
+            } else {
+                guint8   *reassembled = NULL;
+                bluetooth_uuid_t  uuid;
+
+                for (i_frame = 1; i_frame <= fragments->count; ++i_frame) {
+                    fragment = (fragment_t *)wmem_tree_lookup32_le(fragments->fragment, i_frame);
+                    if (fragment) {
+                        reassembled = (guint8*)wmem_realloc(pinfo->pool, reassembled, length + fragment->length);
+                        memcpy(reassembled + length, fragment->data, fragment->length);
+                        length += fragment->length;
+                    }
+                }
+
+                next_tvb = tvb_new_child_real_data(tvb, reassembled, length, length);
+                add_new_data_source(pinfo, next_tvb, "Reassembled AVCTP");
+
+                uuid.size = 2;
+                uuid.bt_uuid = fragments->pid;
+                uuid.data[0] = fragments->pid >> 8;
+                uuid.data[1] = fragments->pid & 0xFF;
+
+                if (!dissector_try_string(bluetooth_uuid_table, print_numeric_bluetooth_uuid(pinfo->pool, &uuid), next_tvb, pinfo, tree, avctp_data)) {
+                    call_data_dissector(next_tvb, pinfo, tree);
+                }
+            }
+
+            fragments = NULL;
+        } else {
+            call_data_dissector(next_tvb, pinfo, tree);
+        }
+    }
+
+    return offset;
+}
+
+void
+proto_register_btavctp(void)
+{
+    module_t *module;
+    expert_module_t* expert_btavctp;
+
+    static hf_register_info hf[] = {
+        { &hf_btavctp_transaction,
+            { "Transaction",          "btavctp.transaction",
+            FT_UINT8, BASE_HEX, NULL, 0xF0,
+            NULL, HFILL }
+        },
+        { &hf_btavctp_packet_type,
+            { "Packet Type",          "btavctp.packet_type",
+            FT_UINT8, BASE_HEX, VALS(packet_type_vals), 0x0C,
+            NULL, HFILL }
+        },
+        { &hf_btavctp_cr,
+            { "C/R",                  "btavctp.cr",
+            FT_UINT8, BASE_HEX, VALS(cr_vals), 0x02,
+            NULL, HFILL }
+        },
+        { &hf_btavctp_ipid,
+            { "IPID",                 "btavctp.ipid",
+            FT_UINT8, BASE_HEX, VALS(ipid_vals), 0x01,
+            NULL, HFILL }
+        },
+        { &hf_btavctp_rfa,
+            { "RFA",                  "btavctp.rfa",
+            FT_UINT8, BASE_HEX, NULL, 0x01,
+            NULL, HFILL }
+        },
+        { &hf_btavctp_pid,
+            { "Profile Identifier",   "btavctp.pid",
+            FT_UINT16, BASE_HEX|BASE_EXT_STRING, &bluetooth_uuid_vals_ext, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_btavctp_number_of_packets,
+            { "Number of packets",    "btavctp.nop",
+            FT_UINT8, BASE_DEC, NULL, 0x00,
+            NULL, HFILL }
+        }
+    };
+
+    static gint *ett[] = {
+        &ett_btavctp
+    };
+
+    static ei_register_info ei[] = {
+        { &ei_btavctp_unexpected_frame, { "btavctp.unexpected_frame", PI_PROTOCOL, PI_WARN, "Unexpected frame", EXPFILL }},
+        { &ei_btavctp_invalid_profile,  { "btavctp.invalid_profile",  PI_PROTOCOL, PI_NOTE, "Invalid Profile", EXPFILL }},
+    };
+
+    /* Decode As handling */
+    reassembling = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
+
+    proto_btavctp = proto_register_protocol("Bluetooth AVCTP Protocol", "BT AVCTP", "btavctp");
+    btavctp_handle = register_dissector("btavctp", dissect_btavctp, proto_btavctp);
+
+    proto_register_field_array(proto_btavctp, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+    expert_btavctp = expert_register_protocol(proto_btavctp);
+    expert_register_field_array(expert_btavctp, ei, array_length(ei));
+
+    module = prefs_register_protocol_subtree("Bluetooth", proto_btavctp, NULL);
+    prefs_register_static_text_preference(module, "avctp.version",
+            "Bluetooth Protocol AVCTP version: 1.4",
+            "Version of protocol supported by this dissector.");
+}
+
+
+void
+proto_reg_handoff_btavctp(void)
+{
+    dissector_add_string("bluetooth.uuid", "17", btavctp_handle);
+
+    dissector_add_uint("btl2cap.psm", BTL2CAP_PSM_AVCTP_CTRL, btavctp_handle);
+    dissector_add_uint("btl2cap.psm", BTL2CAP_PSM_AVCTP_BRWS, btavctp_handle);
+
+    dissector_add_for_decode_as("btl2cap.cid", btavctp_handle);
+}
+
+/*
+ * Editor modelines  -  https://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:
+ */