*/
]]
+-- json decode/encode from https://gist.github.com/tylerneylon/59f4bcf316be525b30ab
+-- licensed by the author tylerneylon into public domain. Thanks!
+
+local json = {}
+
+-- Internal functions.
+
+local function kind_of(obj)
+ if type(obj) ~= 'table' then return type(obj) end
+ local i = 1
+ for _ in pairs(obj) do
+ if obj[i] ~= nil then i = i + 1 else return 'table' end
+ end
+ if i == 1 then return 'table' else return 'array' end
+end
+
+local function escape_str(s)
+ local in_char = {'\\', '"', '/', '\b', '\f', '\n', '\r', '\t'}
+ local out_char = {'\\', '"', '/', 'b', 'f', 'n', 'r', 't'}
+ for i, c in ipairs(in_char) do
+ s = s:gsub(c, '\\' .. out_char[i])
+ end
+ return s
+end
+
+-- Returns pos, did_find; there are two cases:
+-- 1. Delimiter found: pos = pos after leading space + delim; did_find = true.
+-- 2. Delimiter not found: pos = pos after leading space; did_find = false.
+-- This throws an error if err_if_missing is true and the delim is not found.
+local function skip_delim(str, pos, delim, err_if_missing)
+ pos = pos + #str:match('^%s*', pos)
+ if str:sub(pos, pos) ~= delim then
+ if err_if_missing then
+ error('Expected ' .. delim .. ' near position ' .. pos)
+ end
+ return pos, false
+ end
+ return pos + 1, true
+end
+
+-- Expects the given pos to be the first character after the opening quote.
+-- Returns val, pos; the returned pos is after the closing quote character.
+local function parse_str_val(str, pos, val)
+ val = val or ''
+ local early_end_error = 'End of input found while parsing string.'
+ if pos > #str then error(early_end_error) end
+ local c = str:sub(pos, pos)
+ if c == '"' then return val, pos + 1 end
+ if c ~= '\\' then return parse_str_val(str, pos + 1, val .. c) end
+ -- We must have a \ character.
+ local esc_map = {b = '\b', f = '\f', n = '\n', r = '\r', t = '\t'}
+ local nextc = str:sub(pos + 1, pos + 1)
+ if not nextc then error(early_end_error) end
+ return parse_str_val(str, pos + 2, val .. (esc_map[nextc] or nextc))
+end
+
+-- Returns val, pos; the returned pos is after the number's final character.
+local function parse_num_val(str, pos)
+ local num_str = str:match('^-?%d+%.?%d*[eE]?[+-]?%d*', pos)
+ local val = tonumber(num_str)
+ if not val then error('Error parsing number at position ' .. pos .. '.') end
+ return val, pos + #num_str
+end
+
+
+-- Public values and functions.
+
+function json.stringify(obj, as_key)
+ local s = {} -- We'll build the string as an array of strings to be concatenated.
+ local kind = kind_of(obj) -- This is 'array' if it's an array or type(obj) otherwise.
+ if kind == 'array' then
+ if as_key then error('Can\'t encode array as key.') end
+ s[#s + 1] = '['
+ for i, val in ipairs(obj) do
+ if i > 1 then s[#s + 1] = ', ' end
+ s[#s + 1] = json.stringify(val)
+ end
+ s[#s + 1] = ']'
+ elseif kind == 'table' then
+ if as_key then error('Can\'t encode table as key.') end
+ s[#s + 1] = '{'
+ for k, v in pairs(obj) do
+ if #s > 1 then s[#s + 1] = ', ' end
+ s[#s + 1] = json.stringify(k, true)
+ s[#s + 1] = ':'
+ s[#s + 1] = json.stringify(v)
+ end
+ s[#s + 1] = '}'
+ elseif kind == 'string' then
+ return '"' .. escape_str(obj) .. '"'
+ elseif kind == 'number' then
+ if as_key then return '"' .. tostring(obj) .. '"' end
+ return tostring(obj)
+ elseif kind == 'boolean' then
+ return tostring(obj)
+ elseif kind == 'nil' then
+ return 'null'
+ else
+ error('Unjsonifiable type: ' .. kind .. '.')
+ end
+ return table.concat(s)
+end
+
+json.null = {} -- This is a one-off table to represent the null value.
+
+function json.parse(str, pos, end_delim)
+ pos = pos or 1
+ if pos > #str then error('Reached unexpected end of input.') end
+ local pos = pos + #str:match('^%s*', pos) -- Skip whitespace.
+ local first = str:sub(pos, pos)
+ if first == '{' then -- Parse an object.
+ local obj, key, delim_found = {}, true, true
+ pos = pos + 1
+ while true do
+ key, pos = json.parse(str, pos, '}')
+ if key == nil then return obj, pos end
+ if not delim_found then error('Comma missing between object items.') end
+ pos = skip_delim(str, pos, ':', true) -- true -> error if missing.
+ obj[key], pos = json.parse(str, pos)
+ pos, delim_found = skip_delim(str, pos, ',')
+ end
+ elseif first == '[' then -- Parse an array.
+ local arr, val, delim_found = {}, true, true
+ pos = pos + 1
+ while true do
+ val, pos = json.parse(str, pos, ']')
+ if val == nil then return arr, pos end
+ if not delim_found then error('Comma missing between array items.') end
+ arr[#arr + 1] = val
+ pos, delim_found = skip_delim(str, pos, ',')
+ end
+ elseif first == '"' then -- Parse a string.
+ return parse_str_val(str, pos + 1)
+ elseif first == '-' or first:match('%d') then -- Parse a number.
+ return parse_num_val(str, pos)
+ elseif first == end_delim then -- End of an object or array.
+ return nil, pos + 1
+ else -- Parse true, false, or null.
+ local literals = {['true'] = true, ['false'] = false, ['null'] = json.null}
+ for lit_str, lit_val in pairs(literals) do
+ local lit_end = pos + #lit_str - 1
+ if str:sub(pos, lit_end) == lit_str then return lit_val, lit_end + 1 end
+ end
+ local pos_info_str = 'position ' .. pos .. ': ' .. str:sub(pos, pos + 10)
+ error('Invalid json syntax starting at ' .. pos_info_str)
+ end
+end
+
+
local vpp = {}
local ffi = require("ffi")
int pneum_read(char **data, int *l);
int pneum_write(char *data, int len);
void pneum_free(char *data);
+ uint32_t pneum_get_msg_index(unsigned char * name);
]]
vpp.pneum_path = args.pneum_path
vpp.msg_number_to_name = {}
vpp.msg_number_to_type = {}
vpp.msg_number_to_pointer_type = {}
+ vpp.msg_name_to_crc = {}
vpp.c_type_to_fields = {}
vpp.events = {}
vpp.plugin_version = {}
return vpp
end
+function vpp.resolve_message_number(msgname)
+ local name = msgname .. "_" .. vpp.msg_name_to_crc[msgname]
+ local idx = vpp.pneum.pneum_get_msg_index(vpp.c_str(name))
+ if vpp.debug_dump then
+ print("Index for " .. tostring(name) .. " is " .. tostring(idx))
+ end
+ vpp.msg_name_to_number[msgname] = idx
+ vpp.msg_number_to_name[idx] = msgname
+ vpp.msg_number_to_type[idx] = "vl_api_" .. msgname .. "_t"
+ vpp.msg_number_to_pointer_type[idx] = vpp.msg_number_to_type[idx] .. " *"
+ ffi.cdef("\n\n enum { vl_msg_" .. msgname .. " = " .. idx .. " };\n\n")
+end
+
function vpp.connect(vpp, client_name)
local name = "lua_client"
if client_name then
if tonumber(ret) == 0 then
vpp.is_connected = true
end
+ for k, v in pairs(vpp.msg_name_to_number) do
+ vpp.resolve_message_number(k)
+ end
end
function vpp.disconnect(vpp)
vpp.pneum.pneum_disconnect()
end
+function vpp.json_api(vpp, path, plugin_name)
+ -- print("Consuming the VPP api from "..path)
+ local ffii = {}
+ local f = io.open(path, "r")
+ if not f then
+ print("Could not open " .. path)
+ return nil
+ end
+ local data = f:read("*all")
+ local json = json.parse(data)
+ if not (json.types or json.messages) then
+ print("Can not parse " .. path)
+ return nil
+ end
+
+ local all_types = {}
+
+ for i, v in ipairs(json.types) do
+ table.insert(all_types, { typeonly = 1, desc = v })
+ end
+ for i, v in ipairs(json.messages) do
+ table.insert(all_types, { typeonly = 0, desc = v })
+ end
+ for i, v in ipairs(all_types) do
+ local typeonly = v.typeonly
+ local name = v.desc[1]
+ local c_type = "vl_api_" .. name .. "_t"
+
+ local fields = {}
+ -- vpp.msg_name_to_fields[name] = fields
+ -- print("CTYPE " .. c_type)
+ vpp.c_type_to_fields[c_type] = fields
+ vpp.t_lua2c[c_type] = vpp.t_lua2c["__MSG__"]
+ vpp.t_c2lua[c_type] = vpp.t_c2lua["__MSG__"]
+
+ local cdef = { "\n\n#pragma pack(1)\ntypedef struct _vl_api_", name, " {\n" }
+ for ii, vv in ipairs(v.desc) do
+ if type(vv) == "table" then
+ if vv.crc then
+ vpp.msg_name_to_crc[name] = string.sub(vv.crc, 3) -- strip the leading 0x
+ else
+ local fieldtype = vv[1]
+ local fieldname = vv[2]
+ local fieldcount = vv[3]
+ local fieldcountvar = vv[4]
+ local fieldrec = { name = fieldname, c_type = fieldtype, array = fieldcount, array_size = fieldcountvar }
+ if fieldcount then
+ table.insert(cdef, " " .. fieldtype .. " " .. fieldname .. "[" .. fieldcount .. "];\n")
+ if fieldtype == "u8" then
+ -- any array of bytes is treated as a string
+ elseif vpp.t_lua2c[fieldtype] then
+ -- print("Array of " .. fieldtype .. " is ok!")
+ else
+ print("Unknown array type: ", name, " : " , fieldname, " : ", fieldtype, ":", fieldcount, ":", fieldcountvar)
+ end
+ else
+ table.insert(cdef, " " .. fieldtype .. " " .. fieldname .. ";\n")
+ end
+ fields[fieldname] = fieldrec
+ end
+ end
+ end
+
+ table.insert(cdef, "} vl_api_" .. name .. "_t;")
+ table.insert(ffii, table.concat(cdef))
+
+ if typeonly == 0 then
+ -- we will want to resolve this later
+ if vpp.debug_dump then
+ print("Remember to resolve " .. name)
+ end
+ vpp.msg_name_to_number[name] = -1
+ if vpp.is_connected then
+ vpp.resolve_message_number(name)
+ end
+ end
+
+ end
+ local cdef_full = table.concat(ffii)
+ ffi.cdef(cdef_full)
+end
+
function vpp.consume_api(vpp, path, plugin_name)
-- print("Consuming the VPP api from "..path)
local ffii = {}
if lua2c then
return(lua2c(c_type, src, dst_c_ptr))
else
- print("vpp.lua2c: do not know how to store type " .. c_type)
+ print("vpp.lua2c: do not know how to store type " .. tostring(c_type))
+ local x = "a" .. nil
return 0
end
end
local cstruct = ""
local options = options_in or {}
if msg_num then
+ if vpp.debug_dump then
+ print("Message #" .. tostring(msg_num) .. " for name " .. tostring(api_name))
+ end
vpp:api_write(api_name, req_table)
if not vpp.msg_name_to_number[end_message_name] or options.force_ping then
end_message_name = "control_ping_reply"
Code Review / vpp.git / commitdiff