mirror of
https://github.com/neocturne/fastd.git
synced 2025-05-15 04:35:08 +02:00
Implement new lexer that is not generated by flex to reduce code size
This commit is contained in:
parent
cd0f973cf6
commit
bf721f718e
8 changed files with 505 additions and 373 deletions
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@ -5,7 +5,6 @@ set(CMAKE_MODULE_PATH ${FASTD_SOURCE_DIR})
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set(FASTD_VERSION "v8+")
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set(FASTD_VERSION "v8+")
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find_package(BISON 2.5 REQUIRED)
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find_package(BISON 2.5 REQUIRED)
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find_package(FLEX REQUIRED)
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set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
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set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
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find_package(Threads)
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find_package(Threads)
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120
FindFLEX.cmake
120
FindFLEX.cmake
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@ -1,120 +0,0 @@
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#=============================================================================
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# Copyright 2009 Kitware, Inc.
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# Copyright 2006 Tristan Carel
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# * Neither the names of Kitware, Inc., the Insight Software Consortium,
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# nor the names of their contributors may be used to endorse or promote
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# ------------------------------------------------------------------------------
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#
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# The above copyright and license notice applies to distributions of
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# CMake in source and binary form. Some source files contain additional
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# notices of original copyright by their contributors; see each source
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# for details. Third-party software packages supplied with CMake under
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# compatible licenses provide their own copyright notices documented in
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# corresponding subdirectories.
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#=============================================================================
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FIND_PROGRAM(FLEX_EXECUTABLE flex DOC "path to the flex executable")
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MARK_AS_ADVANCED(FLEX_EXECUTABLE)
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FIND_LIBRARY(FL_LIBRARY NAMES fl
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DOC "Path to the fl library")
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FIND_PATH(FLEX_INCLUDE_DIR FlexLexer.h
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DOC "Path to the flex headers")
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MARK_AS_ADVANCED(FL_LIBRARY FLEX_INCLUDE_DIR)
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SET(FLEX_INCLUDE_DIRS ${FLEX_INCLUDE_DIR})
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SET(FLEX_LIBRARIES ${FL_LIBRARY})
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IF(FLEX_EXECUTABLE)
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EXECUTE_PROCESS(COMMAND ${FLEX_EXECUTABLE} --version
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OUTPUT_VARIABLE FLEX_version_output
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ERROR_VARIABLE FLEX_version_error
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RESULT_VARIABLE FLEX_version_result
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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IF(NOT ${FLEX_version_result} EQUAL 0)
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IF(FLEX_FIND_REQUIRED)
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MESSAGE(SEND_ERROR "Command \"${FLEX_EXECUTABLE} --version\" failed with output:\n${FLEX_version_output}\n${FLEX_version_error}")
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ELSE()
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MESSAGE("Command \"${FLEX_EXECUTABLE} --version\" failed with output:\n${FLEX_version_output}\n${FLEX_version_error}\nFLEX_VERSION will not be available")
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ENDIF()
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ELSE()
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STRING(REGEX REPLACE "^flex (.*)$" "\\1"
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FLEX_VERSION "${FLEX_version_output}")
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ENDIF()
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#============================================================
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# FLEX_TARGET (public macro)
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#============================================================
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#
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MACRO(FLEX_TARGET Name Input Output)
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SET(FLEX_TARGET_usage "FLEX_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
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IF(${ARGC} GREATER 3)
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IF(${ARGC} EQUAL 5)
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IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
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SET(FLEX_EXECUTABLE_opts "${ARGV4}")
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SEPARATE_ARGUMENTS(FLEX_EXECUTABLE_opts)
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ELSE()
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MESSAGE(SEND_ERROR ${FLEX_TARGET_usage})
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ENDIF()
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ELSE()
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MESSAGE(SEND_ERROR ${FLEX_TARGET_usage})
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ENDIF()
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ENDIF()
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STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\2" _fileext "${Output}")
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STRING(REPLACE "c" "h" _fileext ${_fileext})
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STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\1${_fileext}"
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OutputHeader "${Output}")
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ADD_CUSTOM_COMMAND(OUTPUT ${Output} ${OutputHeader}
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COMMAND ${FLEX_EXECUTABLE}
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ARGS ${FLEX_EXECUTABLE_opts} -o${Output} --header-file=${OutputHeader} ${Input}
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DEPENDS ${Input}
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COMMENT "[FLEX][${Name}] Building scanner with flex ${FLEX_VERSION}"
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
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SET(FLEX_${Name}_DEFINED TRUE)
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SET(FLEX_${Name}_OUTPUTS ${Output} ${OutputHeader})
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SET(FLEX_${Name}_OUTPUT_HEADER ${OutputHeader})
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SET(FLEX_${Name}_INPUT ${Input})
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SET(FLEX_${Name}_COMPILE_FLAGS ${FLEX_EXECUTABLE_opts})
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ENDMACRO(FLEX_TARGET)
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#============================================================
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ENDIF(FLEX_EXECUTABLE)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(FLEX REQUIRED_VARS FLEX_EXECUTABLE
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VERSION_VAR FLEX_VERSION)
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# FindFLEX.cmake ends here
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@ -11,7 +11,6 @@ endif(WITH_METHOD_AES128_GCM)
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include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${FASTD_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR} ${CAP_INCLUDE_DIR} ${UECC_INCLUDE_DIRS} ${NACL_INCLUDE_DIR})
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include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${FASTD_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR} ${CAP_INCLUDE_DIR} ${UECC_INCLUDE_DIRS} ${NACL_INCLUDE_DIR})
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link_directories(${UECC_LIBRARY_DIRS})
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link_directories(${UECC_LIBRARY_DIRS})
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FLEX_TARGET(fastd_config_lex config.l ${CMAKE_CURRENT_BINARY_DIR}/config.ll.c)
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BISON_TARGET(fastd_config_parse config.y ${CMAKE_CURRENT_BINARY_DIR}/config.yy.c)
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BISON_TARGET(fastd_config_parse config.y ${CMAKE_CURRENT_BINARY_DIR}/config.yy.c)
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add_executable(fastd
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add_executable(fastd
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@ -21,6 +20,7 @@ add_executable(fastd
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crypto.c
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crypto.c
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crypto_linux.c
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crypto_linux.c
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handshake.c
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handshake.c
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lex.c
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options.c
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options.c
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peer.c
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peer.c
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printf.c
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printf.c
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@ -34,7 +34,6 @@ add_executable(fastd
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task.c
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task.c
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tuntap.c
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tuntap.c
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protocol_ec25519_fhmqvc.c
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protocol_ec25519_fhmqvc.c
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${FLEX_fastd_config_lex_OUTPUTS}
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${BISON_fastd_config_parse_OUTPUTS}
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${BISON_fastd_config_parse_OUTPUTS}
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${METHODS}
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${METHODS}
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)
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)
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11
src/config.c
11
src/config.c
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@ -25,8 +25,8 @@
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#include "fastd.h"
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#include "fastd.h"
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#include "lex.h"
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#include "peer.h"
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#include "peer.h"
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#include <config.ll.h>
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#include <config.yy.h>
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#include <config.yy.h>
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#include <dirent.h>
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#include <dirent.h>
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@ -414,11 +414,10 @@ bool fastd_read_config(fastd_context_t *ctx, fastd_config_t *conf, const char *f
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char *filename2 = NULL;
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char *filename2 = NULL;
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char *dir = NULL;
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char *dir = NULL;
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FILE *file;
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FILE *file;
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yyscan_t scanner;
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fastd_lex_t *lex = NULL;
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fastd_config_pstate *ps;
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fastd_config_pstate *ps;
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fastd_string_stack_t *strings = NULL;
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fastd_string_stack_t *strings = NULL;
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fastd_config_yylex_init(&scanner);
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ps = fastd_config_pstate_new();
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ps = fastd_config_pstate_new();
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if (!filename) {
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if (!filename) {
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@ -433,7 +432,7 @@ bool fastd_read_config(fastd_context_t *ctx, fastd_config_t *conf, const char *f
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}
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}
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}
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}
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fastd_config_yyset_in(file, scanner);
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lex = fastd_lex_init(file);
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if (filename) {
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if (filename) {
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filename2 = strdup(filename);
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filename2 = strdup(filename);
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@ -458,7 +457,7 @@ bool fastd_read_config(fastd_context_t *ctx, fastd_config_t *conf, const char *f
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int parse_ret = fastd_config_push_parse(ps, token, &token_val, &loc, ctx, conf, filename, depth+1);
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int parse_ret = fastd_config_push_parse(ps, token, &token_val, &loc, ctx, conf, filename, depth+1);
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while(parse_ret == YYPUSH_MORE) {
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while(parse_ret == YYPUSH_MORE) {
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token = fastd_config_yylex(&token_val, &loc, scanner);
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token = fastd_lex(&token_val, &loc, lex);
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if (token < 0) {
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if (token < 0) {
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pr_error(ctx, "config error: %s at %s:%i:%i", token_val.error, filename, loc.first_line, loc.first_column);
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pr_error(ctx, "config error: %s at %s:%i:%i", token_val.error, filename, loc.first_line, loc.first_column);
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@ -480,8 +479,8 @@ bool fastd_read_config(fastd_context_t *ctx, fastd_config_t *conf, const char *f
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end_free:
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end_free:
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fastd_string_stack_free(strings);
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fastd_string_stack_free(strings);
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fastd_lex_destroy(lex);
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fastd_config_pstate_delete(ps);
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fastd_config_pstate_delete(ps);
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fastd_config_yylex_destroy(scanner);
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if(chdir(oldcwd))
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if(chdir(oldcwd))
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pr_error(ctx, "can't chdir to `%s': %s", oldcwd, strerror(errno));
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pr_error(ctx, "can't chdir to `%s': %s", oldcwd, strerror(errno));
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244
src/config.l
244
src/config.l
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@ -1,244 +0,0 @@
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/*
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Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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%option prefix="fastd_config_yy"
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%option noyywrap
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%option nounput
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%option noinput
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%option bison-bridge
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%option bison-locations
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%option reentrant
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%option warn
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%s NEEDSPACE
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%s STRING
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%s COMMENT
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%top {
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#include <config.yy.h>
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}
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%{
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typedef struct keyword {
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const char *keyword;
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int token;
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} keyword_t;
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/* the keyword list must be sorted */
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static const keyword_t keywords[] = {
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{ "addresses", TOK_ADDRESSES },
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{ "any", TOK_ANY },
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{ "as", TOK_AS },
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{ "auto", TOK_AUTO },
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{ "bind", TOK_BIND },
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{ "capabilities", TOK_CAPABILITIES },
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{ "crypto", TOK_CRYPTO },
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{ "debug", TOK_DEBUG },
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{ "default", TOK_DEFAULT },
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{ "disestablish", TOK_DISESTABLISH },
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{ "down", TOK_DOWN },
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{ "drop", TOK_DROP },
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{ "early", TOK_EARLY },
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{ "error", TOK_ERROR },
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{ "establish", TOK_ESTABLISH },
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{ "fatal", TOK_FATAL },
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{ "float", TOK_FLOAT },
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{ "forward", TOK_FORWARD },
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{ "from", TOK_FROM },
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{ "group", TOK_GROUP },
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{ "hide", TOK_HIDE },
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{ "include", TOK_INCLUDE },
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{ "info", TOK_INFO },
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{ "interface", TOK_INTERFACE },
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{ "ip", TOK_IP },
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{ "ipv4", TOK_IPV4 },
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{ "ipv6", TOK_IPV6 },
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{ "key", TOK_KEY },
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{ "level", TOK_LEVEL },
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{ "limit", TOK_LIMIT },
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{ "log", TOK_LOG },
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{ "mac", TOK_MAC },
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{ "method", TOK_METHOD },
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{ "mode", TOK_MODE },
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{ "mtu", TOK_MTU },
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{ "no", TOK_NO },
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{ "on", TOK_ON },
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{ "peer", TOK_PEER },
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{ "peers", TOK_PEERS },
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{ "pmtu", TOK_PMTU },
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{ "port", TOK_PORT },
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{ "post-down", TOK_POST_DOWN },
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{ "pre-up", TOK_PRE_UP },
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{ "protocol", TOK_PROTOCOL },
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{ "remote", TOK_REMOTE },
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{ "secret", TOK_SECRET },
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{ "stderr", TOK_STDERR },
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{ "syslog", TOK_SYSLOG },
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{ "tap", TOK_TAP },
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{ "to", TOK_TO },
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{ "tun", TOK_TUN },
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{ "up", TOK_UP },
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{ "use", TOK_USE },
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{ "user", TOK_USER },
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{ "verbose", TOK_VERBOSE },
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{ "verify", TOK_VERIFY },
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{ "warn", TOK_WARN },
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{ "yes", TOK_YES },
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};
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static int compare_keywords(const void *v1, const void *v2) {
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const keyword_t *k1 = v1, *k2 = v2;
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return strcmp(k1->keyword, k2->keyword);
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}
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#define UPDATE_LOCATION do { \
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yylloc->first_line = yylloc->last_line; \
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yylloc->first_column = yylloc->last_column+1; \
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|
||||||
yylloc->last_column += yyleng; \
|
|
||||||
} while (0)
|
|
||||||
%}
|
|
||||||
|
|
||||||
%%
|
|
||||||
|
|
||||||
<INITIAL>{
|
|
||||||
[a-z][-a-z0-9]* {
|
|
||||||
const keyword_t key = {yytext};
|
|
||||||
const keyword_t *ret = bsearch(&key, keywords, sizeof(keywords)/sizeof(keyword_t), sizeof(keyword_t), compare_keywords);
|
|
||||||
|
|
||||||
UPDATE_LOCATION;
|
|
||||||
|
|
||||||
if (!ret) {
|
|
||||||
yylval->error = "syntax error";
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
BEGIN(NEEDSPACE);
|
|
||||||
return ret->token;
|
|
||||||
}
|
|
||||||
|
|
||||||
[0-9]+ {
|
|
||||||
char *endptr;
|
|
||||||
|
|
||||||
UPDATE_LOCATION;
|
|
||||||
|
|
||||||
yylval->uint64 = strtoull(yytext, &endptr, 10);
|
|
||||||
if (*endptr) {
|
|
||||||
yylval->error = "invalid integer constant";
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
BEGIN(NEEDSPACE);
|
|
||||||
return TOK_UINT;
|
|
||||||
}
|
|
||||||
|
|
||||||
[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} {
|
|
||||||
UPDATE_LOCATION;
|
|
||||||
|
|
||||||
if (!inet_pton(AF_INET, yytext, &yylval->addr4)) {
|
|
||||||
yylval->error = "invalid address";
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
BEGIN(NEEDSPACE);
|
|
||||||
return TOK_ADDR4;
|
|
||||||
}
|
|
||||||
|
|
||||||
\[[0-9a-fA-F:]+\] {
|
|
||||||
UPDATE_LOCATION;
|
|
||||||
|
|
||||||
yytext[yyleng-1] = 0;
|
|
||||||
|
|
||||||
if (!inet_pton(AF_INET6, yytext+1, &yylval->addr6)) {
|
|
||||||
yylval->error = "invalid address";
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
BEGIN(NEEDSPACE);
|
|
||||||
return TOK_ADDR6;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
<INITIAL,NEEDSPACE>{
|
|
||||||
[;:\{\}] { UPDATE_LOCATION; BEGIN(INITIAL); return yytext[0]; }
|
|
||||||
|
|
||||||
\n { yylloc->last_column = 0; yylloc->last_line++; BEGIN(INITIAL); }
|
|
||||||
|
|
||||||
[ \t\r] |
|
|
||||||
#.* |
|
|
||||||
\/\/.* { UPDATE_LOCATION; BEGIN(INITIAL); }
|
|
||||||
|
|
||||||
\/\* { UPDATE_LOCATION; BEGIN(COMMENT); }
|
|
||||||
}
|
|
||||||
|
|
||||||
<INITIAL>\" { UPDATE_LOCATION; BEGIN(STRING); }
|
|
||||||
<STRING>[^"\\\n] { yylloc->last_column++; yymore(); }
|
|
||||||
<STRING>\n { yylloc->last_line++; yylloc->last_column = 0; yymore(); }
|
|
||||||
<STRING>\\. { yylloc->last_column+=2; yymore(); }
|
|
||||||
<STRING>\\\n { yylloc->last_line++; yylloc->last_column = 0; yymore(); }
|
|
||||||
<STRING>\" {
|
|
||||||
int i, esc = 0;
|
|
||||||
|
|
||||||
for (i = 0; i < yyleng; i++) {
|
|
||||||
if (yytext[i] == '\\') {
|
|
||||||
i++;
|
|
||||||
if (yytext[i] == '\n') {
|
|
||||||
esc+=2;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
yytext[i-esc-1] = yytext[i];
|
|
||||||
esc++;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
else if(esc) {
|
|
||||||
yytext[i-esc] = yytext[i];
|
|
||||||
}
|
|
||||||
}
|
|
||||||
yytext[yyleng-esc-1] = 0;
|
|
||||||
yylval->str = fastd_string_stack_dup(yytext);
|
|
||||||
BEGIN(NEEDSPACE);
|
|
||||||
yylloc->last_column++;
|
|
||||||
return TOK_STRING;
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
<COMMENT>\*\/ { yylloc->last_column += yyleng; BEGIN(INITIAL); }
|
|
||||||
<COMMENT>[^\n] { yylloc->last_column++; }
|
|
||||||
<COMMENT>\n { yylloc->last_line++; yylloc->last_column = 0; }
|
|
||||||
|
|
||||||
. {
|
|
||||||
yylloc->first_line = yylloc->last_line;
|
|
||||||
yylloc->first_column = yylloc->last_column+1;
|
|
||||||
yylval->error = "syntax error";
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
<INITIAL><<EOF>> { return 0; }
|
|
||||||
<COMMENT><<EOF>> { yylval->error = "unterminated block comment"; return -1; }
|
|
||||||
<STRING><<EOF>> { yylval->error = "unterminated string"; return -1; }
|
|
||||||
%%
|
|
||||||
457
src/lex.c
Normal file
457
src/lex.c
Normal file
|
|
@ -0,0 +1,457 @@
|
||||||
|
/*
|
||||||
|
Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
|
||||||
|
All rights reserved.
|
||||||
|
|
||||||
|
Redistribution and use in source and binary forms, with or without
|
||||||
|
modification, are permitted provided that the following conditions are met:
|
||||||
|
|
||||||
|
1. Redistributions of source code must retain the above copyright notice,
|
||||||
|
this list of conditions and the following disclaimer.
|
||||||
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
||||||
|
this list of conditions and the following disclaimer in the documentation
|
||||||
|
and/or other materials provided with the distribution.
|
||||||
|
|
||||||
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||||
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||||
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||||
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||||
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||||
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||||
|
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||||
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#include "lex.h"
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
|
||||||
|
|
||||||
|
struct fastd_lex {
|
||||||
|
FILE *file;
|
||||||
|
|
||||||
|
bool needspace;
|
||||||
|
|
||||||
|
size_t start;
|
||||||
|
size_t end;
|
||||||
|
size_t tok_len;
|
||||||
|
char buffer[1024];
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
typedef struct keyword {
|
||||||
|
const char *keyword;
|
||||||
|
int token;
|
||||||
|
} keyword_t;
|
||||||
|
|
||||||
|
/* the keyword list must be sorted */
|
||||||
|
static const keyword_t keywords[] = {
|
||||||
|
{ "addresses", TOK_ADDRESSES },
|
||||||
|
{ "any", TOK_ANY },
|
||||||
|
{ "as", TOK_AS },
|
||||||
|
{ "auto", TOK_AUTO },
|
||||||
|
{ "bind", TOK_BIND },
|
||||||
|
{ "capabilities", TOK_CAPABILITIES },
|
||||||
|
{ "crypto", TOK_CRYPTO },
|
||||||
|
{ "debug", TOK_DEBUG },
|
||||||
|
{ "default", TOK_DEFAULT },
|
||||||
|
{ "disestablish", TOK_DISESTABLISH },
|
||||||
|
{ "down", TOK_DOWN },
|
||||||
|
{ "drop", TOK_DROP },
|
||||||
|
{ "early", TOK_EARLY },
|
||||||
|
{ "error", TOK_ERROR },
|
||||||
|
{ "establish", TOK_ESTABLISH },
|
||||||
|
{ "fatal", TOK_FATAL },
|
||||||
|
{ "float", TOK_FLOAT },
|
||||||
|
{ "forward", TOK_FORWARD },
|
||||||
|
{ "from", TOK_FROM },
|
||||||
|
{ "group", TOK_GROUP },
|
||||||
|
{ "hide", TOK_HIDE },
|
||||||
|
{ "include", TOK_INCLUDE },
|
||||||
|
{ "info", TOK_INFO },
|
||||||
|
{ "interface", TOK_INTERFACE },
|
||||||
|
{ "ip", TOK_IP },
|
||||||
|
{ "ipv4", TOK_IPV4 },
|
||||||
|
{ "ipv6", TOK_IPV6 },
|
||||||
|
{ "key", TOK_KEY },
|
||||||
|
{ "level", TOK_LEVEL },
|
||||||
|
{ "limit", TOK_LIMIT },
|
||||||
|
{ "log", TOK_LOG },
|
||||||
|
{ "mac", TOK_MAC },
|
||||||
|
{ "method", TOK_METHOD },
|
||||||
|
{ "mode", TOK_MODE },
|
||||||
|
{ "mtu", TOK_MTU },
|
||||||
|
{ "no", TOK_NO },
|
||||||
|
{ "on", TOK_ON },
|
||||||
|
{ "peer", TOK_PEER },
|
||||||
|
{ "peers", TOK_PEERS },
|
||||||
|
{ "pmtu", TOK_PMTU },
|
||||||
|
{ "port", TOK_PORT },
|
||||||
|
{ "post-down", TOK_POST_DOWN },
|
||||||
|
{ "pre-up", TOK_PRE_UP },
|
||||||
|
{ "protocol", TOK_PROTOCOL },
|
||||||
|
{ "remote", TOK_REMOTE },
|
||||||
|
{ "secret", TOK_SECRET },
|
||||||
|
{ "stderr", TOK_STDERR },
|
||||||
|
{ "syslog", TOK_SYSLOG },
|
||||||
|
{ "tap", TOK_TAP },
|
||||||
|
{ "to", TOK_TO },
|
||||||
|
{ "tun", TOK_TUN },
|
||||||
|
{ "up", TOK_UP },
|
||||||
|
{ "use", TOK_USE },
|
||||||
|
{ "user", TOK_USER },
|
||||||
|
{ "verbose", TOK_VERBOSE },
|
||||||
|
{ "verify", TOK_VERIFY },
|
||||||
|
{ "warn", TOK_WARN },
|
||||||
|
{ "yes", TOK_YES },
|
||||||
|
};
|
||||||
|
|
||||||
|
static int compare_keywords(const void *v1, const void *v2) {
|
||||||
|
const keyword_t *k1 = v1, *k2 = v2;
|
||||||
|
return strcmp(k1->keyword, k2->keyword);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static bool advance(fastd_lex_t *lex) {
|
||||||
|
if (lex->start > 0) {
|
||||||
|
memmove(lex->buffer, lex->buffer+lex->start, lex->end - lex->start);
|
||||||
|
lex->end -= lex->start;
|
||||||
|
lex->start = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (lex->end == sizeof(lex->buffer))
|
||||||
|
return false;
|
||||||
|
|
||||||
|
size_t l = fread(lex->buffer+lex->end, 1, sizeof(lex->buffer) - lex->end, lex->file);
|
||||||
|
|
||||||
|
lex->end += l;
|
||||||
|
return l;
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline char current(fastd_lex_t *lex) {
|
||||||
|
return lex->buffer[lex->start + lex->tok_len];
|
||||||
|
}
|
||||||
|
|
||||||
|
static char* get_token(fastd_lex_t *lex) {
|
||||||
|
return strndup(lex->buffer+lex->start, lex->tok_len);
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool next(YYLTYPE *yylloc, fastd_lex_t *lex, bool move) {
|
||||||
|
if (lex->start + lex->tok_len >= lex->end)
|
||||||
|
return false;
|
||||||
|
|
||||||
|
if (current(lex) == '\n') {
|
||||||
|
yylloc->last_column = 0;
|
||||||
|
yylloc->last_line++;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
yylloc->last_column++;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (move)
|
||||||
|
lex->start++;
|
||||||
|
else
|
||||||
|
lex->tok_len++;
|
||||||
|
|
||||||
|
|
||||||
|
if (lex->start + lex->tok_len >= lex->end)
|
||||||
|
return advance(lex);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void consume(fastd_lex_t *lex, bool needspace) {
|
||||||
|
lex->start += lex->tok_len;
|
||||||
|
lex->tok_len = 0;
|
||||||
|
|
||||||
|
lex->needspace = needspace;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int syntax_error(YYSTYPE *yylval, fastd_lex_t *lex) {
|
||||||
|
yylval->error = "syntax error";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int io_error(YYSTYPE *yylval, fastd_lex_t *lex) {
|
||||||
|
yylval->error = "I/O error";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline int end(YYSTYPE *yylval, fastd_lex_t *lex) {
|
||||||
|
if (ferror(lex->file))
|
||||||
|
return io_error(yylval, lex);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int consume_comment(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
char prev = 0;
|
||||||
|
|
||||||
|
while (next(yylloc, lex, true)) {
|
||||||
|
if (prev == '*' && current(lex) == '/') {
|
||||||
|
next(yylloc, lex, true);
|
||||||
|
consume(lex, false);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
prev = current(lex);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ferror(lex->file))
|
||||||
|
return io_error(yylval, lex);
|
||||||
|
|
||||||
|
yylval->error = "unterminated block comment";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int unterminated_string(YYSTYPE *yylval, fastd_lex_t *lex) {
|
||||||
|
if (ferror(lex->file))
|
||||||
|
return io_error(yylval, lex);
|
||||||
|
|
||||||
|
yylval->error = "unterminated string";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_string(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
char *buf = NULL;
|
||||||
|
size_t len = 1024;
|
||||||
|
size_t pos = 0;
|
||||||
|
|
||||||
|
if (lex->needspace)
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
buf = malloc(len);
|
||||||
|
|
||||||
|
while (true) {
|
||||||
|
if (!next(yylloc, lex, true)) {
|
||||||
|
free(buf);
|
||||||
|
return unterminated_string(yylval, lex);
|
||||||
|
}
|
||||||
|
|
||||||
|
char cur = current(lex);
|
||||||
|
|
||||||
|
if (cur == '"')
|
||||||
|
break;
|
||||||
|
|
||||||
|
if (cur == '\\') {
|
||||||
|
if (!next(yylloc, lex, true)) {
|
||||||
|
free(buf);
|
||||||
|
return unterminated_string(yylval, lex);
|
||||||
|
}
|
||||||
|
|
||||||
|
cur = current(lex);
|
||||||
|
|
||||||
|
if (cur == '\n')
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (pos >= len) {
|
||||||
|
len *= 2;
|
||||||
|
buf = realloc(buf, len);
|
||||||
|
}
|
||||||
|
|
||||||
|
buf[pos++] = cur;
|
||||||
|
}
|
||||||
|
|
||||||
|
yylval->str = fastd_string_stack_dupn(buf, pos);
|
||||||
|
free(buf);
|
||||||
|
|
||||||
|
next(yylloc, lex, true);
|
||||||
|
consume(lex, true);
|
||||||
|
|
||||||
|
return TOK_STRING;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_ipv6_address(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
if (lex->needspace)
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
while (next(yylloc, lex, false)) {
|
||||||
|
char cur = current(lex);
|
||||||
|
|
||||||
|
if (!((cur >= '0' && cur <= '9') || cur == ':'))
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ok = (current(lex) == ']');
|
||||||
|
|
||||||
|
if (ok) {
|
||||||
|
lex->buffer[lex->start + lex->tok_len] = 0;
|
||||||
|
ok = inet_pton(AF_INET6, lex->buffer+lex->start+1, &yylval->addr6);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!ok) {
|
||||||
|
yylval->error = "invalid address";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
next(yylloc, lex, true);
|
||||||
|
consume(lex, true);
|
||||||
|
|
||||||
|
return TOK_ADDR6;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_ipv4_address(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
if (lex->needspace)
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
while (next(yylloc, lex, false)) {
|
||||||
|
char cur = current(lex);
|
||||||
|
|
||||||
|
if (!((cur >= '0' && cur <= '9') || cur == '.'))
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
char *token = get_token(lex);
|
||||||
|
bool ok = inet_pton(AF_INET, token, &yylval->addr4);
|
||||||
|
|
||||||
|
free(token);
|
||||||
|
|
||||||
|
if (!ok) {
|
||||||
|
yylval->error = "invalid address";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
return TOK_ADDR4;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_number(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
if (lex->needspace)
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
while (next(yylloc, lex, false)) {
|
||||||
|
char cur = current(lex);
|
||||||
|
|
||||||
|
if (cur == '.')
|
||||||
|
return parse_ipv4_address(yylval, yylloc, lex);
|
||||||
|
|
||||||
|
if (!(cur >= '0' && cur <= '9'))
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
char *endptr, *token = get_token(lex);
|
||||||
|
yylval->uint64 = strtoull(token, &endptr, 10);
|
||||||
|
|
||||||
|
bool ok = !*endptr;
|
||||||
|
free(token);
|
||||||
|
|
||||||
|
if (!ok) {
|
||||||
|
yylval->error = "invalid integer constant";
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
return TOK_UINT;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_keyword(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
if (lex->needspace)
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
while (next(yylloc, lex, false)) {
|
||||||
|
char cur = current(lex);
|
||||||
|
|
||||||
|
if (!((cur >= 'a' && cur <= 'z') || (cur >= '0' && cur <= '9') || cur == '-'))
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
char *token = get_token(lex);
|
||||||
|
const keyword_t key = {token};
|
||||||
|
const keyword_t *ret = bsearch(&key, keywords, sizeof(keywords)/sizeof(keyword_t), sizeof(keyword_t), compare_keywords);
|
||||||
|
free(token);
|
||||||
|
|
||||||
|
if (!ret)
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
consume(lex, true);
|
||||||
|
|
||||||
|
return ret->token;
|
||||||
|
}
|
||||||
|
|
||||||
|
fastd_lex_t* fastd_lex_init(FILE *file) {
|
||||||
|
fastd_lex_t *lex = calloc(1, sizeof(fastd_lex_t));
|
||||||
|
lex->file = file;
|
||||||
|
|
||||||
|
advance(lex);
|
||||||
|
|
||||||
|
return lex;
|
||||||
|
}
|
||||||
|
|
||||||
|
void fastd_lex_destroy(fastd_lex_t *lex) {
|
||||||
|
if (!lex)
|
||||||
|
return;
|
||||||
|
|
||||||
|
free(lex);
|
||||||
|
}
|
||||||
|
|
||||||
|
int fastd_lex(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex) {
|
||||||
|
int token;
|
||||||
|
|
||||||
|
while (lex->end > lex->start) {
|
||||||
|
yylloc->first_line = yylloc->last_line;
|
||||||
|
yylloc->first_column = yylloc->last_column+1;
|
||||||
|
|
||||||
|
switch (current(lex)) {
|
||||||
|
case ' ':
|
||||||
|
case '\n':
|
||||||
|
case '\t':
|
||||||
|
case '\r':
|
||||||
|
next(yylloc, lex, true);
|
||||||
|
consume(lex, false);
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case ';':
|
||||||
|
case ':':
|
||||||
|
case '{':
|
||||||
|
case '}':
|
||||||
|
token = current(lex);
|
||||||
|
next(yylloc, lex, true);
|
||||||
|
consume(lex, false);
|
||||||
|
return token;
|
||||||
|
|
||||||
|
case '/':
|
||||||
|
if (!next(yylloc, lex, true))
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
if (current(lex) == '*') {
|
||||||
|
token = consume_comment(yylval, yylloc, lex);
|
||||||
|
if (token)
|
||||||
|
return token;
|
||||||
|
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (current(lex) != '/')
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
|
||||||
|
/* fall-through */
|
||||||
|
case '#':
|
||||||
|
while (next(yylloc, lex, true)) {
|
||||||
|
if (current(lex) == '\n')
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
next(yylloc, lex, true);
|
||||||
|
consume(lex, false);
|
||||||
|
continue;
|
||||||
|
|
||||||
|
case '"':
|
||||||
|
return parse_string(yylval, yylloc, lex);
|
||||||
|
|
||||||
|
case '[':
|
||||||
|
return parse_ipv6_address(yylval, yylloc, lex);
|
||||||
|
|
||||||
|
case '0' ... '9':
|
||||||
|
return parse_number(yylval, yylloc, lex);
|
||||||
|
|
||||||
|
case 'a' ... 'z':
|
||||||
|
return parse_keyword(yylval, yylloc, lex);
|
||||||
|
|
||||||
|
default:
|
||||||
|
return syntax_error(yylval, lex);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return end(yylval, lex);
|
||||||
|
}
|
||||||
41
src/lex.h
Normal file
41
src/lex.h
Normal file
|
|
@ -0,0 +1,41 @@
|
||||||
|
/*
|
||||||
|
Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
|
||||||
|
All rights reserved.
|
||||||
|
|
||||||
|
Redistribution and use in source and binary forms, with or without
|
||||||
|
modification, are permitted provided that the following conditions are met:
|
||||||
|
|
||||||
|
1. Redistributions of source code must retain the above copyright notice,
|
||||||
|
this list of conditions and the following disclaimer.
|
||||||
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
||||||
|
this list of conditions and the following disclaimer in the documentation
|
||||||
|
and/or other materials provided with the distribution.
|
||||||
|
|
||||||
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||||
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||||
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||||
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||||
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||||
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||||
|
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||||
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef _FASTD_LEX_H_
|
||||||
|
#define _FASTD_LEX_H_
|
||||||
|
|
||||||
|
#include "types.h"
|
||||||
|
#include <config.yy.h>
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
|
||||||
|
|
||||||
|
fastd_lex_t* fastd_lex_init(FILE *file);
|
||||||
|
void fastd_lex_destroy(fastd_lex_t *lex);
|
||||||
|
|
||||||
|
int fastd_lex(YYSTYPE *yylval, YYLTYPE *yylloc, fastd_lex_t *lex);
|
||||||
|
|
||||||
|
#endif /* _FASTD_LEX_H_ */
|
||||||
|
|
@ -87,6 +87,7 @@ typedef struct fastd_method fastd_method_t;
|
||||||
|
|
||||||
typedef struct fastd_handshake fastd_handshake_t;
|
typedef struct fastd_handshake fastd_handshake_t;
|
||||||
|
|
||||||
|
typedef struct fastd_lex fastd_lex_t;
|
||||||
typedef struct fastd_string_stack fastd_string_stack_t;
|
typedef struct fastd_string_stack fastd_string_stack_t;
|
||||||
|
|
||||||
typedef struct fastd_resolve_return fastd_resolve_return_t;
|
typedef struct fastd_resolve_return fastd_resolve_return_t;
|
||||||
|
|
|
||||||
Loading…
Add table
Reference in a new issue