diff options
Diffstat (limited to 'wireshark/pictochat.lua')
| -rw-r--r-- | wireshark/pictochat.lua | 152 |
1 files changed, 65 insertions, 87 deletions
diff --git a/wireshark/pictochat.lua b/wireshark/pictochat.lua index 34ca17e..ba16ee0 100644 --- a/wireshark/pictochat.lua +++ b/wireshark/pictochat.lua @@ -1,13 +1,8 @@ -local pc = Proto("pictochat", "Nintendo DS PictoChat") +local p = Proto("pictochat", "PictoChat") -pc.fields.unknown = ProtoField.uint16("pictochat.unknown", "Unknown") +p.fields.unknown = ProtoField.uint16("pictochat.unknown", "Unknown") -pc.fields.frame_type = ProtoField.uint16("pictochat.frame_type", "Frame type", base.DEC, { - [0] = "Normal", -- Used for actual messages, ack packets - [1] = "Announcement", -- TODO: send broadcast??? -}) -pc.fields.original = ProtoField.bool("pictochat.original", "Original") -- only 0 or 2 -pc.fields.msg_type = ProtoField.uint8("pictochat.msg_type", "Message type", base.DEC, { +p.fields.msg_type = ProtoField.uint8("pictochat.msg_type", "Message type", base.DEC, { [0] = "???", [1] = "???", [10] = "Message start", -- sent before a message packet @@ -17,23 +12,22 @@ pc.fields.msg_type = ProtoField.uint8("pictochat.msg_type", "Message type", base [86] = "Message body", -- contains tile data for drawing [184] = "???", -- user leave?? }) -pc.fields.length = ProtoField.uint16("pictochat.length", "Length") -pc.fields.host = ProtoField.ether("pictochat.host", "Room host") -pc.fields.src = ProtoField.ether("pictochat.src", "Source") -pc.fields.dst = ProtoField.ether("pictochat.dst", "Destination") -pc.fields.payload_len = ProtoField.uint16("pictochat.payload_len", "Payload length") -pc.fields.data_len = ProtoField.uint8("pictochat.data_len", "Data length") -pc.fields.data_end = ProtoField.bool("pictochat.data_end", "Data end") -pc.fields.data_offset = ProtoField.uint16("pictochat.data_offset", "Data offset") -pc.fields.data_sequence = ProtoField.uint16("pictochat.data_sequence", "Data sequence") -pc.fields.data = ProtoField.bytes("pictochat.data", "Data") -pc.fields.sequence = ProtoField.uint16("pictochat.sequence", "Packet sequence") -pc.fields.magic_header = ProtoField.bytes("pictochat.magic_header", "Magic (header)") -pc.fields.magic_trailer = ProtoField.bytes("pictochat.magic_trailer", "Magic (trailer)") -pc.fields.user_mac = ProtoField.ether("pictochat.user.mac", "Address") -pc.fields.user_name = ProtoField.string("pictochat.user.name", "Nickname") -pc.fields.user_msg = ProtoField.string("pictochat.user.msg", "Message") -pc.fields.user_color = ProtoField.uint16("pictochat.user.color", "Color", base.DEC, { +p.fields.length = ProtoField.uint16("pictochat.length", "Length") +p.fields.host = ProtoField.ether("pictochat.host", "Room host") +p.fields.src = ProtoField.ether("pictochat.src", "Source") +p.fields.dst = ProtoField.ether("pictochat.dst", "Destination") +p.fields.payload_len = ProtoField.uint16("pictochat.payload_len", "Payload length") +p.fields.data_len = ProtoField.uint8("pictochat.data_len", "Data length") +p.fields.data_end = ProtoField.bool("pictochat.data_end", "Data end") +p.fields.data_offset = ProtoField.uint16("pictochat.data_offset", "Data offset") +p.fields.data_sequence = ProtoField.uint16("pictochat.data_sequence", "Data sequence") +p.fields.data = ProtoField.bytes("pictochat.data", "Data") +p.fields.sequence = ProtoField.uint16("pictochat.sequence", "Packet sequence") +p.fields.magic_trailer = ProtoField.bytes("pictochat.magic_trailer", "Magic (trailer)") +p.fields.user_mac = ProtoField.ether("pictochat.user.mac", "Address") +p.fields.user_name = ProtoField.string("pictochat.user.name", "Nickname") +p.fields.user_msg = ProtoField.string("pictochat.user.msg", "Message") +p.fields.user_color = ProtoField.uint16("pictochat.user.color", "Color", base.DEC, { [0] = "Greyish blue", [1] = "Brown", [2] = "Red", @@ -51,80 +45,66 @@ pc.fields.user_color = ProtoField.uint16("pictochat.user.color", "Color", base.D [14] = "Light purple", [15] = "Dark pink", }) -pc.fields.user_bday_month = ProtoField.uint8("pictochat.user.bday_month", "Month") -pc.fields.user_bday_day = ProtoField.uint8("pictochat.user.bday_day", "Day") -pc.fields.msg_start_len = ProtoField.uint8("pictochat.msg.start_len", "Total length") +p.fields.user_bday_month = ProtoField.uint8("pictochat.user.bday_month", "Month") +p.fields.user_bday_day = ProtoField.uint8("pictochat.user.bday_day", "Day") +p.fields.msg_start_len = ProtoField.uint8("pictochat.msg.start_len", "Total length") -local nifi_length_field = Field.new("nifi.length") -local pc_msg_type_field = Field.new("pictochat.msg_type") local pc_src_field = Field.new("pictochat.src") local pc_dst_field = Field.new("pictochat.dst") local data_remaining = 0 -function pc.dissector(buffer, pinfo, tree) - local header_length = nifi_length_field()() - if header_length == 0 then return end - - buffer = buffer(0x18) -- skip the Ni-Fi header - - local pc_tree = tree:add(pc, buffer(), "PictoChat: " .. header_length .. " bytes") - - -- pictochat header - local pc_header = pc_tree:add(buffer(0x00, 12), "Header: 12 bytes") - pc_header:add_le(pc.fields.frame_type, buffer(0x00, 2)) - pc_header:add_le(pc.fields.original, buffer(0x02, 2)) - local original = buffer(0x02, 2):le_uint() > 0 - pc_header:add_le(pc.fields.unknown, buffer(0x04, 2)) - pc_header:add_le(pc.fields.unknown, buffer(0x06, 2)) - pc_header:add_le(pc.fields.magic_header, buffer(0x08, 2)) -- const 0x1401 - pc_header:add_le(pc.fields.length, buffer(0x0a, 2)) - -- above length represents that of the remaining message so this info is - -- grouped and the buffer is advanced 12 bytes - buffer = buffer(0x0c) - - pc_tree:add_le(pc.fields.unknown, buffer(0x00, 2)) - pc_tree:add_le(pc.fields.unknown, buffer(0x02, 2)) - pc_tree:add_le(pc.fields.dst, buffer(0x04, 6)) - pc_tree:add_le(pc.fields.src, buffer(0x0a, 6)) - pc_tree:add_le(pc.fields.host, buffer(0x10, 6)) - pc_tree:add_le(pc.fields.sequence, buffer(0x16, 2)) - pc_tree:add_le(pc.fields.unknown, buffer(0x18, 2)) - pc_tree:add_le(pc.fields.unknown, buffer(0x1a, 2)) - pc_tree:add_le(pc.fields.msg_type, buffer(0x1c, 1)) +local state = {} + +function p.init() + -- register pictochat as a subdissector for nifi + local dt = DissectorTable.get("nifi") + dt:add(0xfffd, p) -- CMD messages + -- dt:add(0x7dcb, p) -- ACK messages +end + +function p.dissector(buffer, pinfo, tree) + local subtree = tree:add(p, buffer(), string.format("%s: %d bytes", p.description, buffer():len())) + subtree:add_le(p.fields.unknown, buffer(0x00, 2)) + subtree:add_le(p.fields.unknown, buffer(0x02, 2)) + subtree:add_le(p.fields.dst, buffer(0x04, 6)) + subtree:add_le(p.fields.src, buffer(0x0a, 6)) + subtree:add_le(p.fields.host, buffer(0x10, 6)) + subtree:add_le(p.fields.sequence, buffer(0x16, 2)) + subtree:add_le(p.fields.unknown, buffer(0x18, 2)) + subtree:add_le(p.fields.unknown, buffer(0x1a, 2)) + subtree:add_le(p.fields.msg_type, buffer(0x1c, 1)) local msg_type = buffer(0x1c, 1):le_uint() - pc_tree:add_le(pc.fields.unknown, buffer(0x1d, 1)) - pc_tree:add_le(pc.fields.unknown, buffer(0x1e, 2)) + subtree:add_le(p.fields.unknown, buffer(0x1d, 1)) + subtree:add_le(p.fields.unknown, buffer(0x1e, 2)) buffer = buffer(0x20) -- pretty wireshark shit - pinfo.cols.protocol = pc.name + pinfo.cols.protocol = p.name pinfo.cols.src = tostring(pc_src_field()) pinfo.cols.dst = tostring(pc_dst_field()) - pinfo.cols.info = pc_msg_type_field().display .. ", " .. (original and "Original" or "Resend") - - pc_tree:add_le(pc.fields.payload_len, buffer(0x00, 2)) + subtree:add_le(p.fields.payload_len, buffer(0x00, 2)) local payload_length = buffer(0x00, 2):le_uint() buffer = buffer(0x02) - local payload = pc_tree:add(buffer(0x00, payload_length), "Payload: " .. payload_length .. " bytes") + local payload = subtree:add(buffer(0x00, payload_length), "Payload: " .. payload_length .. " bytes") local buffer_next = buffer(payload_length) if msg_type == 48 -- user join then - payload:add_le(pc.fields.user_mac, buffer(0x0a, 6)) -- endianness is fucked - payload:add(pc.fields.user_name, buffer(0x10, 20), buffer(0x10, 20):le_ustring()) - payload:add(pc.fields.user_msg, buffer(0x24, 52), buffer(0x24, 52):le_ustring()) - payload:add_le(pc.fields.user_color, buffer(0x58, 2)) + payload:add_le(p.fields.user_mac, buffer(0x0a, 6)) -- endianness is fucked + payload:add(p.fields.user_name, buffer(0x10, 20), buffer(0x10, 20):le_ustring()) + payload:add(p.fields.user_msg, buffer(0x24, 52), buffer(0x24, 52):le_ustring()) + payload:add_le(p.fields.user_color, buffer(0x58, 2)) local bday = payload:add(buffer(0x5a, 2), string.format("Birthday: %02d/%02d", buffer(0x5a, 1):uint(), buffer(0x5b, 1):uint())) - bday:add(pc.fields.user_bday_month, buffer(0x5a, 1)) - bday:add(pc.fields.user_bday_day, buffer(0x5b, 1)) + bday:add(p.fields.user_bday_month, buffer(0x5a, 1)) + bday:add(p.fields.user_bday_day, buffer(0x5b, 1)) end if msg_type == 10 -- msg start then - payload:add_le(pc.fields.msg_start_len, buffer(0x04, 2)) + payload:add_le(p.fields.msg_start_len, buffer(0x04, 2)) data_remaining = buffer(0x04, 2):le_uint() local segment = buffer(0):bytes() @@ -135,8 +115,8 @@ function pc.dissector(buffer, pinfo, tree) msg_type == 24 or -- msg end msg_type == 86 -- msg body then - payload:add_le(pc.fields.unknown, buffer(0x00, 2)) - payload:add_le(pc.fields.data_len, buffer(0x02, 1)) + payload:add_le(p.fields.unknown, buffer(0x00, 2)) + payload:add_le(p.fields.data_len, buffer(0x02, 1)) local data_length = buffer(0x02, 1):le_uint() if data_remaining > 0 then @@ -144,29 +124,27 @@ function pc.dissector(buffer, pinfo, tree) pinfo.cols.info = string.format("Message body [remaining 0x%04x (%d) bytes]", data_remaining, data_remaining) end - payload:add_le(pc.fields.data_end, buffer(0x03, 1)) + payload:add_le(p.fields.data_end, buffer(0x03, 1)) -- This appears to be some kind of offset for indicating where to store the -- current frame's data in a larger buffer. Messages sent in multiple parts - -- increment this value by 160 for each new original (pc.fields.original == + -- increment this value by 160 for each new original (p.fields.original == -- True) message. - payload:add_le(pc.fields.data_offset, buffer(0x04, 2)) - payload:add_le(pc.fields.unknown, buffer(0x06, 2)) -- usually 0 + payload:add_le(p.fields.data_offset, buffer(0x04, 2)) + payload:add_le(p.fields.unknown, buffer(0x06, 2)) -- usually 0 buffer = buffer(0x08) -- This appears to be the actual message data (the drawing) sent as an -- array of 8x8 tiles. - payload:add(pc.fields.data, buffer(0, data_length)) + payload:add(p.fields.data, buffer(0, data_length)) buffer = buffer(data_length) - payload:add_le(pc.fields.data_sequence, buffer(0x00, 2)) - payload:add_le(pc.fields.unknown, buffer(0x02, 2)) -- copy - pc_tree:add_le(pc.fields.unknown, buffer(0x04, 2)) + payload:add_le(p.fields.data_sequence, buffer(0x00, 2)) + payload:add_le(p.fields.unknown, buffer(0x02, 2)) -- copy + subtree:add_le(p.fields.unknown, buffer(0x04, 2)) buffer = buffer(0x06) end buffer = buffer_next -- after payload - pc_tree:add_le(pc.fields.magic_trailer, buffer(0x02, 2)) -- const 0xb8b6 + subtree:add_le(p.fields.magic_trailer, buffer(0x02, 2)) -- const 0xb8b6 end -register_postdissector(pc) - |