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epson_video_proto = Proto("epson_video", "Epson Video Protocol")
evf = epson_video_proto.fields
evf.magic = ProtoField.string("epson_video.magic", "Magic")
evf.version = ProtoField.string("epson_video.version", "Version")
evf.serverip = ProtoField.ipv4("epson_video.serverip", "Server IP")
evf.cmd = ProtoField.uint32("epson_video.cmd", "Command")
evf.datasize = ProtoField.uint32("epson_video.datasize", "Datasize")
evf.type = ProtoField.uint8("epson_video.type", "Type")
evf.nrects = ProtoField.uint16("epson_video.nrects", "Rect Count")
evf.comp_ctl = ProtoField.uint8("epson_video.comp_ctl", "Compression Control", base.HEX)
function epson_video_proto.dissector(buffer, pinfo, tree)
pinfo.cols.protocol = "EPSON VIDEO"
local subtree = tree:add(epson_video_proto, buffer(), "Epson Video Protocol Data")
if buffer(0,4):string() == "EPRD" then
subtree:add(evf.magic, buffer( 0, 4))
subtree:add(evf.version, buffer( 4, 4))
subtree:add(evf.serverip, buffer( 8, 4))
subtree:add(evf.cmd, buffer(12, 4))
subtree:add(evf.datasize, buffer(16, 4))
else
local _type = subtree:add(evf.type, buffer( 0, 1))
if buffer(0,1):uint() == 0xc9 then
_type:append_text(" (audio?)")
subtree:add_le(evf.datasize, buffer(1,4))
elseif buffer(0,1):uint() == 0x00 and buffer(1,1):uint() == 0x00 then
_type:append_text(" (framebuffer update)")
subtree:add(buffer( 1, 1), "pad: " .. buffer( 1,1):uint())
subtree:add(evf.nrects, buffer( 2, 2))
subtree:add(buffer( 4, 2), "x: " .. buffer( 4,2):uint())
subtree:add(buffer( 6, 2), "y: " .. buffer( 6,2):uint())
subtree:add(buffer( 8, 2), "width: " .. buffer( 8,2):uint())
subtree:add(buffer(10, 2), "height: " .. buffer(10,2):uint())
subtree:add(buffer(12, 4), "encoding: " .. buffer(12,4):uint())
local encoding = buffer(12,4):uint()
-- Tight encoding
if encoding == 7 then
subtree:add(evf.comp_ctl, buffer(16, 1))
local bit = require('bit')
-- jpeg compression (always 0x90 or maybe 0x91?)
if bit.band(buffer(16,1):uint(), 0x90) then
local compactlen_count = 1
local compactlen = bit.band(buffer(17,1):uint(), 0x7F)
if bit.band(buffer(17,1):uint(), 0x80) then
compactlen =
bit.bor(compactlen, bit.lshift(bit.band(buffer(18,1):uint(), 0x7F),7))
compactlen_count = 2
if bit.band(buffer(18,1):uint(), 0x80) then
compactlen =
bit.bor(compactlen,
bit.lshift(bit.band(buffer(19,1):uint(), 0xFF),14))
compactlen_count = 3
end
end
subtree:add(buffer(17, compactlen_count), "compact len: " .. compactlen)
end
end
end
end
end
epson_control_proto = Proto("epson_control", "Epson Control Protocol")
ecf = epson_control_proto.fields
ecf.magic = ProtoField.string("epson_control.magic", "Magic")
ecf.version = ProtoField.string("epson_control.version", "Version")
ecf.clientip = ProtoField.ipv4("epson_control.clientip", "Client IP")
ecf.cmdid = ProtoField.uint32("epson_control.cmdid", "CommandID")
ecf.datasize = ProtoField.uint32("epson_control.datasize", "Datasize")
ecf.record_count = ProtoField.uint32("epson_control.record_count", "Record Count")
-- request connection - fields
ecf.encryption = ProtoField.bool("epson_control.encryption", "Encryption")
ecf.encpassword = ProtoField.string("epson_control.encpassword", "EncPassword")
ecf.subnet = ProtoField.ipv4("epson_control.subnet", "Subnet Mask")
ecf.gateway = ProtoField.ipv4("epson_control.gateway", "Gateway")
ecf.width = ProtoField.uint16("epson_control.width", "Framebuffer Width")
ecf.height = ProtoField.uint16("epson_control.height", "Framebuffer Height")
ecf.bpp = ProtoField.uint8("epson_control.bpp", "Bits per pixel")
ecf.depth = ProtoField.uint8("epson_control.depth", "Depth")
ecf.bigendian = ProtoField.bool("epson_control.big_endian", "BigEndian")
ecf.truecolor = ProtoField.bool("epson_control.true_color", "TrueColor")
ecf.redmax = ProtoField.uint16("epson_control.redmax", "Red Max")
ecf.greenmax = ProtoField.uint16("epson_control.greenmax", "Green Max")
ecf.bluemax = ProtoField.uint16("epson_control.bluemax", "Blue Max")
ecf.redshift = ProtoField.uint8("epson_control.redshift", "Red Shift")
ecf.greenshift = ProtoField.uint8("epson_control.greenshift", "Green Shift")
ecf.blueshift = ProtoField.uint8("epson_control.blueshift", "Blue Shift")
ecf.namelength = ProtoField.uint32("epson_control.namelength", "Name Length")
-- connected - fields
ecf.projname = ProtoField.string("epson_control.proj_name", "Projector Name")
ecf.projstate = ProtoField.uint8("epson_control.proj_state", "Projector State")
-- clientinfo - fields
ecf.usekeyword = ProtoField.bool("epson_control.use_keyword", "Use Keyword")
ecf.displaytype = ProtoField.uint8("epson_control.display_type", "Display Type")
-- connection record
ecf.uniqinfo = ProtoField.ether("epson_control.uniq_info", "Uniq Info")
ecf.keyword = ProtoField.string("epson_control.keyword", "Keyword")
ecf.beamerip = ProtoField.ipv4("epson_control.beamerip", "Beamer IP")
CMD_EASYSEARCH = 1
CMD_IPSEARCH = 2
CMD_CLIENTINFO = 3
CMD_REQCONNECT = 4
CMD_CONNECTED = 5
CMD_REQRESTART = 6
CMD_FINISHRESTART = 7
CMD_DISCONCLIENT = 8
CMD_INTERRUPT = 9
CMD_KEEPALIVE = 10
CMD_SENDREQUESTS = 12
CMD_CLIENTERROR = 13
CMD_RESENDFULLSCRID = 14
CMD_DISPLAYWAIT = 15
CMD_SENDKEY = 16
local cmdname = {
[CMD_EASYSEARCH] = "easysearch",
[CMD_IPSEARCH] = "ipsearch",
[CMD_CLIENTINFO] = "clientinfo",
[CMD_REQCONNECT] = "reqconnect",
[CMD_CONNECTED] = "connected",
[CMD_REQRESTART] = "reqrestart",
[CMD_FINISHRESTART] = "finishrestart",
[CMD_DISCONCLIENT] = "disconclient",
[CMD_INTERRUPT] = "interrupt",
[CMD_KEEPALIVE] = "keepalive",
[CMD_SENDREQUESTS] = "sendrequests",
[CMD_CLIENTERROR] = "clienterror",
[CMD_RESENDFULLSCRID] = "resendfullscrid",
[CMD_DISPLAYWAIT] = "displaywait",
[CMD_SENDKEY] = "sendkey",
[21] = "extra clientinfo?"
}
function epson_control_proto.dissector(buffer, pinfo, tree)
pinfo.cols.protocol = "EPSON CONTROL"
local subtree = tree:add(epson_video_proto, buffer(), "Epson Control Protocol Data")
subtree:add(ecf.magic, buffer(0, 4))
subtree:add(ecf.version, buffer(4, 4))
subtree:add(ecf.clientip, buffer(8,4))
local cmdtree = subtree:add_le(ecf.cmdid, buffer(12, 4))
local commandid = buffer(12,4):le_uint()
cmdtree:append_text(string.format(" (%s)", (cmdname[commandid] or "unknown")))
subtree:add_le(ecf.datasize, buffer(16, 4)):append_text(" bytes")
local datasize = buffer(16,4):le_uint()
if datasize <= 0 then
return
end
local econ_header_size = 20
-- FIXME: not always: e.g cmdid=21
local record_count = buffer(20, 1):uint()
local rectree = subtree:add(ecf.record_count, buffer(20, 1))
if commandid == CMD_CLIENTINFO then
cmdtree:add(ecf.projname, buffer(24, 32))
local state = { [1] = "no use", [2] = "using", [3] = "app use" }
cmdtree:add(ecf.projstate, buffer(56, 1))
:append_text(" (" .. (state[buffer(56,1):uint()] or "") .. ")")
cmdtree:add(ecf.usekeyword, buffer(57, 1))
cmdtree:add(ecf.displaytype, buffer(58, 1))
elseif commandid == CMD_REQCONNECT then
cmdtree:add(ecf.encryption, buffer(24, 1))
cmdtree:add(ecf.encpassword, buffer(25, 8))
cmdtree:add(ecf.subnet, buffer(33, 4))
cmdtree:add(ecf.gateway, buffer(37, 4))
-- 3 byte alignment
local vnesoffset = 37 + 4 + 3
local vnestree = cmdtree:add("VNES init")
vnestree:add_le(ecf.width, buffer(vnesoffset, 2))
vnestree:add_le(ecf.height, buffer(vnesoffset+2, 2))
local fmtoff = vnesoffset + 4
vnestree:add(ecf.bpp, buffer(fmtoff, 1))
vnestree:add(ecf.depth, buffer(fmtoff+1, 1))
vnestree:add(ecf.bigendian, buffer(fmtoff+2, 1))
vnestree:add(ecf.truecolor, buffer(fmtoff+3, 1))
vnestree:add_le(ecf.redmax, buffer(fmtoff+4, 2))
vnestree:add_le(ecf.greenmax, buffer(fmtoff+6, 2))
vnestree:add_le(ecf.bluemax, buffer(fmtoff+8, 2))
vnestree:add(ecf.redshift, buffer(fmtoff+10, 1))
vnestree:add(ecf.greenshift, buffer(fmtoff+11, 1))
vnestree:add(ecf.blueshift, buffer(fmtoff+12, 1))
local pad = 3
vnestree:add_le(ecf.namelength, buffer(fmtoff+16, 4))
elseif commandid == CMD_CONNECTED then
cmdtree:add(ecf.projname, buffer(24, 32))
-- state: 1 == no_use, 2 == using, 3 == app_using
local state = { [1] = "no use", [2] = "using", [3] = "app use" }
cmdtree:add(ecf.projstate, buffer(56, 1))
:append_text(" (" .. (state[buffer(56,1):uint()] or "") .. ")")
elseif commandid == 21 then
cmdtree:add(ecf.uniqinfo, buffer(20, 6))
-- FIXME: verify all
cmdtree:add_le(ecf.width, buffer(20+46, 2)):append_text(" ?")
cmdtree:add_le(ecf.height, buffer(20+46+2, 2)):append_text(" ?")
elseif commandid == 22 then
cmdtree:add(buffer(20+4, 2), "x?: " .. buffer(20+4,2):le_uint())
cmdtree:add(buffer(20+4+2, 2), "y?: " .. buffer(20+4+2,2):le_uint())
cmdtree:add_le(ecf.width, buffer(20+8, 2))
cmdtree:add_le(ecf.height, buffer(20+8+2, 2))
elseif commandid == 25 then
cmdtree:add(buffer(20+4, 4), "unknown1: " .. buffer(20+4,4):le_uint())
cmdtree:add(buffer(20+4+4, 4), "unknown2: " .. buffer(20+4+4,4):le_uint())
end
local econ_command_size = 48
if commandid ~= CMD_CLIENTINFO and
commandid ~= CMD_REQCONNECT and
commandid ~= CMD_CONNECTED and
commandid ~= CMD_CLIENTERROR and
commandid ~= CMD_RESENDFULLSCRID and
commandid ~= CMD_SENDKEY then
econ_command_size = 4
end
local recoffset = econ_header_size + econ_command_size
if record_count == 1 then
rectree:add(ecf.uniqinfo, buffer(recoffset, 6))
rectree:add(ecf.keyword, buffer(recoffset+6, 16))
rectree:add(ecf.beamerip, buffer(recoffset+22, 4))
end
end
tcp_table = DissectorTable.get("tcp.port")
tcp_table:add(3620, epson_control_proto)
tcp_table:add(3621, epson_video_proto)
udp_table = DissectorTable.get("udp.port")
udp_table:add(3620, epson_control_proto)
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