--- /dev/null
+--[[
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+]]
+
+-- 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")
+
+--[[
+
+The basic type definitions. A bit of weird gymnastic with
+unionization of the hton* and ntoh* functions results
+is to make handling of signed and unsigned types a bit cleaner,
+essentially building typecasting into a C union.
+
+The vl_api_opaque_message_t is a synthetic type assumed to have
+enough storage to hold the entire API message regardless of the type.
+During the operation it is casted to the specific message struct types.
+
+]]
+
+
+ffi.cdef([[
+
+typedef uint8_t u8;
+typedef int8_t i8;
+typedef uint16_t u16;
+typedef int16_t i16;
+typedef uint32_t u32;
+typedef int32_t i32;
+typedef uint64_t u64;
+typedef int64_t i64;
+typedef double f64;
+typedef float f32;
+
+#pragma pack(1)
+typedef union {
+ u16 u16;
+ i16 i16;
+} lua_ui16t;
+
+#pragma pack(1)
+typedef union {
+ u32 u32;
+ i32 i32;
+} lua_ui32t;
+
+u16 ntohs(uint16_t hostshort);
+u16 htons(uint16_t hostshort);
+u32 htonl(uint32_t along);
+u32 ntohl(uint32_t along);
+void *memset(void *s, int c, size_t n);
+void *memcpy(void *dest, void *src, size_t n);
+
+#pragma pack(1)
+typedef struct _vl_api_opaque_message {
+ u16 _vl_msg_id;
+ u8 data[65536];
+} vl_api_opaque_message_t;
+]])
+
+
+-- CRC-based version stuff
+
+local crc32c_table = ffi.new('const uint32_t[256]',
+ { 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
+ 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
+ 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
+ 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
+ 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
+ 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
+ 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
+ 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
+ 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
+ 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
+ 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
+ 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
+ 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
+ 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
+ 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
+ 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
+ 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
+ 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
+ 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
+ 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
+ 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
+ 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
+ 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
+ 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
+ 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
+ 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
+ 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
+ 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
+ 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
+ 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
+ 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
+ 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
+ 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
+ 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
+ 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
+ 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
+ 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
+ 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
+ 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
+ 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
+ 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
+ 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
+ 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
+ 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
+ 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
+ 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
+ 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
+ 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
+ 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
+ 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
+ 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
+ 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
+ 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
+ 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
+ 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
+ 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
+ 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
+ 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
+ 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
+ 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
+ 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
+ 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
+ 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
+ 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351 }
+);
+
+local function CRC8(crc, d)
+ return bit.bxor(bit.rshift(crc, 8), crc32c_table[bit.band(0xff, bit.bxor(crc, d))])
+end
+
+local function CRC16(crc, d)
+ crc = CRC8(crc, bit.band(d, 0xFF))
+ d = bit.rshift(d, 8)
+ crc = CRC8(crc, bit.band(d, 0xFF))
+ return crc
+end
+
+local function string_crc(str, crc)
+ for i=1,#str do
+ -- print("S", i, string.byte(str, i), string.char(string.byte(str, i)))
+ crc = CRC8(crc, string.byte(str, i))
+ end
+ return crc
+end
+
+local tokens = {
+ { ["match"] =' ', ["act"] = { } },
+ { ["match"] ='\n', ["act"] = { } },
+ { ["match"] ="manual_endian", ["act"] = { "NODE_MANUAL_ENDIAN", "MANUAL_ENDIAN", 276 } },
+ { ["match"] ="define", ["act"] = { "NODE_DEFINE", "DEFINE", 267 } },
+ { ["match"] ="dont_trace", ["act"] = { "NODE_DONT_TRACE", "DONT_TRACE", 279 } },
+ { ["match"] ="f64", ["act"] = { "NODE_F64", "PRIMTYPE", string_crc } },
+ { ["match"] ="i16", ["act"] = { "NODE_I16", "PRIMTYPE", string_crc } },
+ { ["match"] ="i32", ["act"] = { "NODE_I32", "PRIMTYPE", string_crc } },
+ { ["match"] ="i64", ["act"] = { "NODE_I64", "PRIMTYPE", string_crc } },
+ { ["match"] ="i8", ["act"] = { "NODE_I8", "PRIMTYPE", string_crc } },
+ { ["match"] ="manual_print", ["act"] = { "NODE_MANUAL_PRINT", "MANUAL_PRINT", 275 } },
+ { ["match"] ="noversion", ["act"] = { "NODE_NOVERSION", "NOVERSION", 274 } },
+ { ["match"] ="packed", ["act"] = { "NODE_PACKED", "TPACKED", 266 } },
+ { ["match"] ="typeonly", ["act"] = { "NODE_TYPEONLY", "TYPEONLY", 278 } },
+ { ["match"] ="u16", ["act"] = { "NODE_U16", "PRIMTYPE", string_crc } },
+ { ["match"] ="u32", ["act"] = { "NODE_U32", "PRIMTYPE", string_crc } },
+ { ["match"] ="u64", ["act"] = { "NODE_U64", "PRIMTYPE", string_crc } },
+ { ["match"] ="u8", ["act"] = { "NODE_U8", "PRIMTYPE", string_crc } },
+ { ["match"] ="union", ["act"] = { "NODE_UNION", "UNION", 271 } },
+ { ["match"] ="uword", ["act"] = { "NODE_UWORD", "PRIMTYPE", string_crc } },
+ { ["match"] ="%(", ["act"] = { "NODE_LPAR", "LPAR", 259 } },
+ { ["match"] ="%)", ["act"] = { "NODE_RPAR", "RPAR", 258 } },
+ { ["match"] =";", ["act"] = { "NODE_SEMI", "SEMI", 260 } },
+ { ["match"] ="%[", ["act"] = { "NODE_LBRACK", "LBRACK", 261 } },
+ { ["match"] ="%]", ["act"] = { "NODE_RBRACK", "RBRACK", 262 } },
+ { ["match"] ="%{", ["act"] = { "NODE_LCURLY", "LCURLY", 268 } },
+ { ["match"] ="%}", ["act"] = { "NODE_RCURLY", "RCURLY", 269 } },
+ { ["match"] ='%b""', ["act"] = { "NODE_STRING", "STRING", string_crc } },
+ { ["match"] ='%b@@', ["act"] = { "NODE_HELPER", "HELPER_STRING", string_crc } },
+ -- TODO: \ must be consumed
+ { ["match"] ='[_a-zA-Z][_a-zA-Z0-9]*',
+ ["act"] = { "NODE_NAME", "NAME", string_crc } },
+ { ["match"] ='[0-9]+', ["act"] = { "NODE_NUMBER", "NUMBER", string_crc } },
+ { ["match"] ='#[^\n]+', ["act"] = { "NODE_PRAGMA", "PRAGMA", nil } },
+}
+
+
+function vpp.crc_version_string(data)
+ local input_crc = 0
+ -- Get rid of comments
+ data = data:gsub("/%*.-%*/", "")
+ data = data:gsub("//[^\n]+", "")
+ -- print(data)
+ idx = 1
+ while (true) do
+ local matched = nil
+ for k, v in ipairs(tokens) do
+ if not matched then
+ local x, y, cap = string.find(data, v["match"], idx)
+ if x == idx then
+ matched = { ["node"] = v["act"], ["x"] = x, ["y"] = y, ["cap"] = cap, ["chars"] = string.sub(data, x, y) }
+ -- print(k, v, x, y, cap, matched.chars, matched.node[0] )
+ end
+ end
+ end
+ if matched then
+ idx = idx + (matched.y - matched.x + 1)
+ if matched.node[1] then
+ local act = matched.node[3]
+ if type(act) == "function" then
+ input_crc = act(matched.chars, input_crc)
+ elseif type(act) == "number" then
+ input_crc = CRC16(input_crc, act)
+ end
+ -- print(vpp.dump(matched))
+ end
+ else
+ -- print("NOT MATCHED!")
+ local crc = CRC16(input_crc, 0xFFFFFFFF)
+ return string.sub(string.format("%x", crc), -8)
+ end
+ end
+end
+
+
+function vpp.dump(o)
+ if type(o) == 'table' then
+ local s = '{ '
+ for k,v in pairs(o) do
+ if type(k) ~= 'number' then k = '"'..k..'"' end
+ s = s .. '['..k..'] = ' .. vpp.dump(v) .. ','
+ end
+ return s .. '} '
+ else
+ return tostring(o)
+ end
+end
+
+function vpp.hex_dump(buf)
+ local ret = {}
+ for i=1,math.ceil(#buf/16) * 16 do
+ if (i-1) % 16 == 0 then table.insert(ret, string.format('%08X ', i-1)) end
+ table.insert(ret, ( i > #buf and ' ' or string.format('%02X ', buf:byte(i)) ))
+ if i % 8 == 0 then table.insert(ret, ' ') end
+ if i % 16 == 0 then table.insert(ret, buf:sub(i-16+1, i):gsub('%c','.')..'\n' ) end
+ end
+ return table.concat(ret)
+end
+
+
+function vpp.c_str(text_in)
+ local text = text_in -- \000 will be helpfully added by ffi.copy
+ local c_str = ffi.new("char[?]", #text+1)
+ ffi.copy(c_str, text)
+ return c_str
+end
+
+
+function vpp.init(vpp, args)
+ local pneum_api = args.pneum_api or [[
+ int cough_pneum_attach(char *pneum_path, char *cough_path);
+ int pneum_connect(char *name, char *chroot_prefix, void *cb);
+ int pneum_disconnect(void);
+ 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
+ ffi.cdef(pneum_api)
+ local init_res = 0
+ vpp.pneum = ffi.load(vpp.pneum_path)
+ if (init_res < 0) then
+ return nil
+ end
+
+ vpp.next_msg_num = 1
+ vpp.msg_name_to_number = {}
+ vpp.msg_name_to_fields = {}
+ 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 = {}
+ vpp.is_connected = false
+
+
+ vpp.t_lua2c = {}
+ vpp.t_c2lua = {}
+ vpp.t_lua2c["u8"] = function(c_type, src, dst_c_ptr)
+ if type(src) == "string" then
+ -- ffi.copy adds a zero byte at the end. Grrr.
+ -- ffi.copy(dst_c_ptr, src)
+ ffi.C.memcpy(dst_c_ptr, vpp.c_str(src), #src)
+ return(#src)
+ elseif type(src) == "table" then
+ for i,v in ipairs(src) do
+ ffi.cast("u8 *", dst_c_ptr)[i-1] = v
+ end
+ return(#src)
+ else
+ return 1, src -- ffi.cast("u8", src)
+ end
+ end
+ vpp.t_c2lua["u8"] = function(c_type, src_ptr, src_len)
+ if src_len then
+ return ffi.string(src_ptr, src_len)
+ else
+ return (tonumber(src_ptr))
+ end
+ end
+
+ vpp.t_lua2c["u16"] = function(c_type, src, dst_c_ptr)
+ if type(src) == "table" then
+ for i,v in ipairs(src) do
+ ffi.cast("u16 *", dst_c_ptr)[i-1] = ffi.C.htons(v)
+ end
+ return(2 * #src)
+ else
+ return 2, (ffi.C.htons(src))
+ end
+ end
+ vpp.t_c2lua["u16"] = function(c_type, src_ptr, src_len)
+ if src_len then
+ local out = {}
+ for i = 0,src_len-1 do
+ out[i+1] = tonumber(ffi.C.ntohs(src_ptr[i]))
+ end
+ return out
+ else
+ return (tonumber(ffi.C.ntohs(src_ptr)))
+ end
+ end
+
+ vpp.t_lua2c["u32"] = function(c_type, src, dst_c_ptr)
+ if type(src) == "table" then
+ for i,v in ipairs(src) do
+ ffi.cast("u32 *", dst_c_ptr)[i-1] = ffi.C.htonl(v)
+ end
+ return(4 * #src)
+ else
+ return 4, (ffi.C.htonl(src))
+ end
+ end
+ vpp.t_c2lua["u32"] = function(c_type, src_ptr, src_len)
+ if src_len then
+ local out = {}
+ for i = 0,src_len-1 do
+ out[i+1] = tonumber(ffi.C.ntohl(src_ptr[i]))
+ end
+ return out
+ else
+ return (tonumber(ffi.C.ntohl(src_ptr)))
+ end
+ end
+ vpp.t_lua2c["i32"] = function(c_type, src, dst_c_ptr)
+ if type(src) == "table" then
+ for i,v in ipairs(src) do
+ ffi.cast("i32 *", dst_c_ptr)[i-1] = ffi.C.htonl(v)
+ end
+ return(4 * #src)
+ else
+ return 4, (ffi.C.htonl(src))
+ end
+ end
+ vpp.t_c2lua["i32"] = function(c_type, src_ptr, src_len)
+ local ntohl = function(src)
+ local u32val = ffi.cast("u32", src)
+ local ntohlval = (ffi.C.ntohl(u32val))
+ local out = tonumber(ffi.cast("i32", ntohlval + 0LL))
+ return out
+ end
+ if src_len then
+ local out = {}
+ for i = 0,src_len-1 do
+ out[i+1] = tonumber(ntohl(src_ptr[i]))
+ end
+ else
+ return (tonumber(ntohl(src_ptr)))
+ end
+ end
+
+ vpp.t_lua2c["u64"] = function(c_type, src, dst_c_ptr)
+ if type(src) == "table" then
+ for i,v in ipairs(src) do
+ ffi.cast("u64 *", dst_c_ptr)[i-1] = v --- FIXME ENDIAN
+ end
+ return(8 * #src)
+ else
+ return 8, ffi.cast("u64", src) --- FIXME ENDIAN
+ end
+ end
+ vpp.t_c2lua["u64"] = function(c_type, src_ptr, src_len)
+ if src_len then
+ local out = {}
+ for i = 0,src_len-1 do
+ out[i+1] = tonumber(src_ptr[i]) -- FIXME ENDIAN
+ end
+ return out
+ else
+ return (tonumber(src_ptr)) --FIXME ENDIAN
+ end
+ end
+
+
+
+
+ vpp.t_lua2c["__MSG__"] = function(c_type, src, dst_c_ptr)
+ local dst = ffi.cast(c_type .. " *", dst_c_ptr)
+ local additional_len = 0
+ local fields_info = vpp.c_type_to_fields[c_type]
+ -- print("__MSG__ type: " .. tostring(c_type))
+ ffi.C.memset(dst_c_ptr, 0, ffi.sizeof(dst[0]))
+ -- print(vpp.dump(fields_info))
+ -- print(vpp.dump(src))
+ for k,v in pairs(src) do
+ local field = fields_info[k]
+ if not field then
+ print("ERROR: field " .. tostring(k) .. " in message " .. tostring(c_type) .. " is unknown")
+ end
+ local lua2c = vpp.t_lua2c[field.c_type]
+ -- print("__MSG__ field " .. tostring(k) .. " : " .. vpp.dump(field))
+ -- if the field is not an array type, try to coerce the argument to a number
+ if not field.array and type(v) == "string" then
+ v = tonumber(v)
+ end
+ if not lua2c then
+ print("__MSG__ " .. tostring(c_type) .. " t_lua2c: can not store field " .. field.name ..
+ " type " .. field.c_type .. " dst " .. tostring(dst[k]))
+ return 0
+ end
+ local len = 0
+ local val = nil
+ if field.array and (type(v) == "table") then
+ -- print("NTFY: field " .. tostring(k) .. " in message " .. tostring(c_type) .. " is an array")
+ for field_i, field_v in ipairs(v) do
+ -- print("NTFY: setting member#" .. tostring(field_i) .. " to value " .. vpp.dump(field_v))
+ local field_len, field_val = lua2c(field.c_type, field_v, dst[k][field_i-1])
+ len = len + field_len
+ end
+ else
+ len, val = lua2c(field.c_type, v, dst[k])
+ end
+ if not field.array then
+ dst[k] = val
+ else
+ if 0 == field.array then
+ additional_len = additional_len + len
+ -- print("Adding " .. tostring(len) .. " bytes due to field " .. tostring(field.name))
+ -- If there is a variable storing the length
+ -- and the input table does not set it, do magic
+ if field.array_size and not src[field.array_size] then
+ local size_field = fields_info[field.array_size]
+ if size_field then
+ dst[field.array_size] = vpp.t_c2lua[size_field.c_type](size_field.c_type, len)
+ end
+ end
+ end
+ end
+ -- print("Full message:\n" .. vpp.hex_dump(ffi.string(ffi.cast('void *', req_store_cache), 64)))
+ end
+ return (ffi.sizeof(dst[0])+additional_len)
+ end
+
+ vpp.t_c2lua["__MSG__"] = function(c_type, src_ptr, src_len)
+ local out = {}
+ local reply_typed_ptr = ffi.cast(c_type .. " *", src_ptr)
+ local field_desc = vpp.c_type_to_fields[c_type]
+ if src_len then
+ for i = 0,src_len-1 do
+ out[i+1] = vpp.t_c2lua[c_type](c_type, src_ptr[i])
+ end
+ return out
+ end
+
+ for k, v in pairs(field_desc) do
+ local v_c2lua = vpp.t_c2lua[v.c_type]
+ if v_c2lua then
+ local len = v.array
+ -- print(dump(v))
+ if len then
+ local len_field_name = k .. "_length"
+ local len_field = field_desc[len_field_name]
+ if (len_field) then
+ local real_len = vpp.t_c2lua[len_field.c_type](len_field.c_type, reply_typed_ptr[len_field_name])
+ out[k] = v_c2lua(v.c_type, reply_typed_ptr[k], real_len)
+ elseif len == 0 then
+ -- check if len = 0, then must be a field which contains the size
+ len_field = field_desc[v.array_size]
+ local real_len = vpp.t_c2lua[len_field.c_type](len_field.c_type, reply_typed_ptr[v.array_size])
+ -- print("REAL length: " .. vpp.dump(v) .. " : " .. tostring(real_len))
+ out[k] = v_c2lua(v.c_type, reply_typed_ptr[k], real_len)
+ else
+ -- alas, just stuff the entire array
+ out[k] = v_c2lua(v.c_type, reply_typed_ptr[k], len)
+ end
+ else
+ out[k] = v_c2lua(v.c_type, reply_typed_ptr[k])
+ end
+ else
+ out[k] = "<no accessor function for type " .. tostring(v.c_type) .. ">"
+ end
+ -- print(k, out[k])
+ end
+ return out
+ end
+
+ 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
+ name = client_name
+ end
+ local ret = vpp.pneum.pneum_connect(vpp.c_str(client_name), nil, nil)
+ 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 = {}
+ local f = io.open(path, "r")
+ if not f then
+ print("Could not open " .. path)
+ return nil
+ end
+ local data = f:read("*all")
+ -- Remove all C comments
+ data = data:gsub("/%*.-%*/", "")
+ if vpp.is_connected and not plugin_name then
+ print(path .. ": must specify plugin name!")
+ return
+ end
+ if plugin_name then
+ vpp.plugin_version[plugin_name] = vpp.crc_version_string(data)
+ local full_plugin_name = plugin_name .. "_" .. vpp.plugin_version[plugin_name]
+ local reply = vpp:api_call("get_first_msg_id", { name = full_plugin_name } )
+ vpp.next_msg_num = tonumber(reply[1].first_msg_id)
+ print("Plugin " .. full_plugin_name .. " first message is " .. tostring(vpp.next_msg_num))
+ end
+ -- print ("data len: ", #data)
+ data = data:gsub("\n(.-)(%S+)%s*{([^}]*)}", function (preamble, name, members)
+ local _, typeonly = preamble:gsub("typeonly", "")
+ local maybe_msg_id_field = { [0] = "u16 _vl_msg_id;", "" }
+ local onedef = "\n\n#pragma pack(1)\ntypedef struct _vl_api_"..name.. " {\n" ..
+ -- " u16 _vl_msg_id;" ..
+ maybe_msg_id_field[typeonly] ..
+ members:gsub("%[[a-zA-Z_]+]", "[0]") ..
+ "} vl_api_" .. name .. "_t;"
+
+ 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 mirec = { name = "_vl_msg_id", c_type = "u16", array = nil, array_size = nil }
+ if typeonly == 0 then
+ fields[mirec.name] = mirec
+ end
+
+ -- populate the field reflection table for the message
+ -- sets the various type information as well as the accessors for lua<->C conversion
+ members:gsub("(%S+)%s+(%S+);", function (fieldtype, fieldname)
+ local fieldcount = nil
+ local fieldcountvar = nil
+ -- data = data:gsub("%[[a-zA-Z_]+]", "[0]")
+ fieldname = fieldname:gsub("(%b[])", function(cnt)
+ fieldcount = tonumber(cnt:sub(2, -2));
+ if not fieldcount then
+ fieldcount = 0
+ fieldcountvar = cnt:sub(2, -2)
+ end
+ return ""
+ end)
+ local fieldrec = { name = fieldname, c_type = fieldtype, array = fieldcount, array_size = fieldcountvar }
+ if fieldcount then
+ 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
+ end
+ fields[fieldname] = fieldrec
+ end)
+
+ -- print(dump(fields))
+
+ if typeonly == 0 then
+ local this_message_number = vpp.next_msg_num
+ vpp.next_msg_num = vpp.next_msg_num + 1
+ vpp.msg_name_to_number[name] = this_message_number
+ vpp.msg_number_to_name[this_message_number] = name
+ vpp.msg_number_to_type[this_message_number] = "vl_api_" .. name .. "_t"
+ vpp.msg_number_to_pointer_type[this_message_number] = vpp.msg_number_to_type[this_message_number] .. " *"
+ onedef = onedef .. "\n\n enum { vl_msg_" .. name .. " = " .. this_message_number .. " };\n\n"
+ end
+ table.insert(ffii, onedef);
+ return "";
+ end)
+ local cdef = table.concat(ffii)
+ -- print(cdef)
+ ffi.cdef(cdef)
+ end
+
+
+function vpp.lua2c(vpp, c_type, src, dst_c_ptr)
+ -- returns the number of bytes written to memory pointed by dst
+ local lua2c = vpp.t_lua2c[c_type]
+ if lua2c then
+ return(lua2c(c_type, src, dst_c_ptr))
+ else
+ print("vpp.lua2c: do not know how to store type " .. tostring(c_type))
+ local x = "a" .. nil
+ return 0
+ end
+end
+
+function vpp.c2lua(vpp, c_type, src_ptr, src_len)
+ -- returns the lua data structure
+ local c2lua = vpp.t_c2lua[c_type]
+ if c2lua then
+ return(c2lua(c_type, src_ptr, src_len))
+ else
+ print("vpp.c2lua: do not know how to load type " .. c_type)
+ return nil
+ end
+end
+
+local req_store_cache = ffi.new("vl_api_opaque_message_t[1]")
+
+function vpp.api_write(vpp, api_name, req_table)
+ local msg_num = vpp.msg_name_to_number[api_name]
+ if not msg_num then
+ print ("API call "..api_name.." is not known")
+ return nil
+ end
+
+ if not req_table then
+ req_table = {}
+ end
+ req_table._vl_msg_id = msg_num
+
+ local packed_len = vpp:lua2c(vpp.msg_number_to_type[msg_num], req_table, req_store_cache)
+ if vpp.debug_dump then
+ print("Write Message length: " .. tostring(packed_len) .. "\n" .. vpp.hex_dump(ffi.string(ffi.cast('void *', req_store_cache), packed_len)))
+ end
+
+ res = vpp.pneum.pneum_write(ffi.cast('void *', req_store_cache), packed_len)
+ return res
+ end
+
+local rep_store_cache = ffi.new("vl_api_opaque_message_t *[1]")
+local rep_len_cache = ffi.new("int[1]")
+
+function vpp.api_read(vpp)
+ local rep_type = "vl_api_opaque_message_t"
+ local rep = rep_store_cache
+ local replen = rep_len_cache
+ res = vpp.pneum.pneum_read(ffi.cast("void *", rep), replen)
+ if vpp.debug_dump then
+ print("Read Message length: " .. tostring(replen[0]) .. "\n" .. vpp.hex_dump(ffi.string(ffi.cast('void *', rep[0]), replen[0])))
+ end
+
+ local reply_msg_num = ffi.C.ntohs(rep[0]._vl_msg_id)
+ local reply_msg_name = vpp.msg_number_to_name[reply_msg_num]
+
+ local reply_typed_ptr = ffi.cast(vpp.msg_number_to_pointer_type[reply_msg_num], rep[0])
+ local out = vpp:c2lua(vpp.msg_number_to_type[reply_msg_num], rep[0], nil, replen[0])
+ if type(out) == "table" then
+ out["luaapi_message_name"] = reply_msg_name
+ end
+
+ vpp.pneum.pneum_free(ffi.cast('void *',rep[0]))
+
+ return reply_msg_name, out
+ end
+
+function vpp.api_call(vpp, api_name, req_table, options_in)
+ local msg_num = vpp.msg_name_to_number[api_name]
+ local end_message_name = api_name .."_reply"
+ local replies = {}
+ 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"
+ vpp:api_write("control_ping")
+ end
+ repeat
+ reply_message_name, reply = vpp:api_read()
+ if reply and not reply.context then
+ -- there may be async events inbetween
+ table.insert(vpp.events, reply)
+ else
+ if reply_message_name ~= "control_ping_reply" then
+ -- do not insert the control ping encapsulation
+ table.insert(replies, reply)
+ end
+ end
+ -- print(reply)
+ until reply_message_name == end_message_name
+ else
+ print(api_name .. " is an unknown API call")
+ return nil
+ end
+ return replies
+ end
+
+return vpp
Code Review / vpp.git / blobdiff