contrib: introduce simple highlighter library
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
parent
777fe674c4
commit
ee88038986
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@ -0,0 +1,25 @@
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CFLAGS ?= -O3 -march=native
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CFLAGS += -std=gnu99
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CFLAGS += -Wall
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CFLAGS += -MMD -MP
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highlight: highlight.o highlighter.o
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fuzz: CC := clang
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fuzz: CFLAGS += -fsanitize=fuzzer
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fuzz: fuzz.c highlighter.c
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gui/Makefile: gui/highlight.pro
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cd gui && qmake
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gui: gui/Makefile
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@$(MAKE) -C gui
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clean:
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rm -f highlight fuzz *.o *.d
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@if [ -f gui/Makefile ]; then $(MAKE) -C gui distclean; fi
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.PHONY: clean gui
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.DEFAULT_GOAL: highlight
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MAKEFLAGS += --no-print-directory
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-include *.d
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wg(8) and wg-quick(8) syntax highlighter library
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================================================
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highlighter.c contains a simple portable highlighter for the wg(8) and
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wg-quick(8) configuration files. Simply copy `highlight.c` and
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`highlight.h` into your project wholesale.
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As a demo, a simple console highlighter program is included, alongside a
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simple Qt5 GUI app to show its usage in realtime.
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There is also a basic fuzzer, because why not?
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Usage:
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$ make
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$ ./highlight < path/to/tunnel.conf
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$ make gui
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$ ./gui/highlight
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$ make fuzz
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$ ./fuzz -workers=$(nproc) -jobs=$(nproc) ./corpus
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@ -0,0 +1,22 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "highlighter.h"
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int LLVMFuzzerTestOneInput(const char *data, size_t size)
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{
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char *str = strndup(data, size);
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if (!str)
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return 0;
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struct highlight_span *spans = highlight_config(str);
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if (!spans)
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return 0;
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for (struct highlight_span *span = spans; span->type != HighlightEnd; ++span);
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free(spans);
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free(str);
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return 0;
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}
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@ -0,0 +1,90 @@
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#include <QApplication>
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#include <QPlainTextEdit>
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#include <QPalette>
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#include <QFontDatabase>
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#include <QVBoxLayout>
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#include <QPushButton>
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extern "C" {
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#include "../highlighter.h"
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}
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static QColor colormap[] = {
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[HighlightSection] = QColor("#ababab"),
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[HighlightField] = QColor("#70c0b1"),
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[HighlightPrivateKey] = QColor("#7aa6da"),
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[HighlightPublicKey] = QColor("#7aa6da"),
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[HighlightPresharedKey] = QColor("#7aa6da"),
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[HighlightIP] = QColor("#b9ca4a"),
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[HighlightCidr] = QColor("#e78c45"),
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[HighlightHost] = QColor("#b9ca4a"),
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[HighlightPort] = QColor("#e78c45"),
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[HighlightMTU] = QColor("#c397d8"),
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[HighlightKeepalive] = QColor("#c397d8"),
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[HighlightComment] = QColor("#969896"),
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[HighlightDelimiter] = QColor("#7aa6da"),
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#ifndef MOBILE_WGQUICK_SUBSET
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[HighlightTable] = QColor("#c397d8"),
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[HighlightFwMark] = QColor("#c397d8"),
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[HighlightSaveConfig] = QColor("#c397d8"),
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[HighlightCmd] = QColor("#969896"),
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#endif
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[HighlightError] = QColor("#d54e53")
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};
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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QWidget w;
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w.setWindowTitle(QObject::tr("WireGuard Configuration Highlighter"));
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QVBoxLayout v;
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w.setLayout(&v);
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QPlainTextEdit e;
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v.addWidget(&e);
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QPalette p(e.palette());
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p.setColor(QPalette::Base, QColor("#010101"));
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p.setColor(QPalette::Text, QColor("#eaeaea"));
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e.setPalette(p);
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QFont f(QFontDatabase::systemFont(QFontDatabase::FixedFont));
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f.setPointSize(16);
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e.setFont(f);
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e.setMinimumSize(400, 500);
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bool guard = false;
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QObject::connect(&e, &QPlainTextEdit::textChanged, [&]() {
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if (guard)
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return;
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struct highlight_span *spans = highlight_config(e.toPlainText().toLatin1().data());
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if (!spans)
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return;
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QTextCursor cursor(e.document());
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QTextCharFormat format;
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cursor.beginEditBlock();
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cursor.movePosition(QTextCursor::Start, QTextCursor::MoveAnchor);
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cursor.movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
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format.setForeground(p.color(QPalette::Text));
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format.setUnderlineStyle(QTextCharFormat::NoUnderline);
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cursor.mergeCharFormat(format);
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for (struct highlight_span *span = spans; span->type != HighlightEnd; ++span) {
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cursor.movePosition(QTextCursor::Start, QTextCursor::MoveAnchor);
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cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::MoveAnchor, span->start);
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cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, span->len);
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format.setForeground(colormap[span->type]);
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format.setUnderlineStyle(span->type == HighlightError ? QTextCharFormat::SpellCheckUnderline : QTextCharFormat::NoUnderline);
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cursor.mergeCharFormat(format);
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}
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free(spans);
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guard = true;
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cursor.endEditBlock();
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guard = false;
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});
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QPushButton b;
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v.addWidget(&b);
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b.setText(QObject::tr("&Randomize colors"));
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QObject::connect(&b, &QPushButton::clicked, [&]() {
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for (size_t i = 0; i < sizeof(colormap) / sizeof(colormap[0]); ++i)
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colormap[i] = QColor::fromHsl(qrand() % 360, qrand() % 192 + 64, qrand() % 128 + 128);
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e.setPlainText(e.toPlainText());
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});
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w.show();
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return a.exec();
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}
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@ -0,0 +1,5 @@
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QT += core gui widgets
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TEMPLATE = app
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TARGET = highlight
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SOURCES += highlight.cpp ../highlighter.c
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HEADERS += ../highlighter.h
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "highlighter.h"
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#define TERMINAL_FG_BLACK "\x1b[30m"
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#define TERMINAL_FG_RED "\x1b[31m"
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#define TERMINAL_FG_GREEN "\x1b[32m"
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#define TERMINAL_FG_YELLOW "\x1b[33m"
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#define TERMINAL_FG_BLUE "\x1b[34m"
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#define TERMINAL_FG_MAGENTA "\x1b[35m"
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#define TERMINAL_FG_CYAN "\x1b[36m"
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#define TERMINAL_FG_WHITE "\x1b[37m"
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#define TERMINAL_FG_DEFAULT "\x1b[39m"
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#define TERMINAL_BG_BLACK "\x1b[40m"
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#define TERMINAL_BG_RED "\x1b[41m"
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#define TERMINAL_BG_GREEN "\x1b[42m"
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#define TERMINAL_BG_YELLOW "\x1b[43m"
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#define TERMINAL_BG_BLUE "\x1b[44m"
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#define TERMINAL_BG_MAGENTA "\x1b[45m"
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#define TERMINAL_BG_CYAN "\x1b[46m"
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#define TERMINAL_BG_WHITE "\x1b[47m"
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#define TERMINAL_BG_DEFAULT "\x1b[49m"
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#define TERMINAL_BOLD "\x1b[1m"
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#define TERMINAL_NO_BOLD "\x1b[22m"
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#define TERMINAL_UNDERLINE "\x1b[4m"
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#define TERMINAL_NO_UNDERLINE "\x1b[24m"
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#define TERMINAL_RESET "\x1b[0m"
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static const char *colormap[] = {
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[HighlightSection] = TERMINAL_FG_BLACK TERMINAL_BOLD,
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[HighlightField] = TERMINAL_FG_BLUE TERMINAL_BOLD,
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[HighlightPrivateKey] = TERMINAL_FG_YELLOW TERMINAL_BOLD,
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[HighlightPublicKey] = TERMINAL_FG_YELLOW TERMINAL_BOLD,
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[HighlightPresharedKey] = TERMINAL_FG_YELLOW TERMINAL_BOLD,
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[HighlightIP] = TERMINAL_FG_GREEN,
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[HighlightCidr] = TERMINAL_FG_YELLOW,
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[HighlightHost] = TERMINAL_FG_GREEN TERMINAL_BOLD,
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[HighlightPort] = TERMINAL_FG_MAGENTA,
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[HighlightMTU] = TERMINAL_FG_BLUE,
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[HighlightKeepalive] = TERMINAL_FG_BLUE,
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[HighlightComment] = TERMINAL_FG_CYAN,
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[HighlightDelimiter] = TERMINAL_FG_CYAN,
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#ifndef MOBILE_WGQUICK_SUBSET
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[HighlightTable] = TERMINAL_FG_BLUE,
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[HighlightFwMark] = TERMINAL_FG_BLUE,
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[HighlightSaveConfig] = TERMINAL_FG_BLUE,
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[HighlightCmd] = TERMINAL_FG_WHITE,
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#endif
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[HighlightError] = TERMINAL_FG_RED TERMINAL_UNDERLINE
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};
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int main(int argc, char *argv[])
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{
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char input[1024 * 1024];
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struct highlight_span *spans;
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size_t last = 0, total_len;
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total_len = fread(input, 1, sizeof(input) - 1, stdin);
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input[total_len] = '\0';
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spans = highlight_config(input);
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fputs(TERMINAL_RESET, stdout);
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for (struct highlight_span *span = spans; span->type != HighlightEnd; ++span) {
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fwrite(input + last, 1, span->start - last, stdout);
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fputs(colormap[span->type], stdout);
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fwrite(input + span->start, 1, span->len, stdout);
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fputs(TERMINAL_RESET, stdout);
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last = span->start + span->len;
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}
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fwrite(input + last, 1, total_len - last, stdout);
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free(spans);
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return 0;
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}
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@ -0,0 +1,620 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "highlighter.h"
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typedef struct {
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const char *s;
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size_t len;
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} string_span_t;
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static bool is_decimal(char c)
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{
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return c >= '0' && c <= '9';
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}
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static bool is_hexadecimal(char c)
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{
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return is_decimal(c) || ((c | 32) >= 'a' && (c | 32) <= 'f');
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}
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static bool is_alphabet(char c)
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{
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return (c | 32) >= 'a' && (c | 32) <= 'z';
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}
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static bool is_same(string_span_t s, const char *c)
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{
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size_t len = strlen(c);
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if (len != s.len)
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return false;
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return !memcmp(s.s, c, len);
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}
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static bool is_caseless_same(string_span_t s, const char *c)
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{
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size_t len = strlen(c);
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if (len != s.len)
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return false;
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for (size_t i = 0; i < len; ++i) {
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char a = c[i], b = s.s[i];
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if ((unsigned)a - 'a' < 26)
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a &= 95;
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if ((unsigned)b - 'a' < 26)
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b &= 95;
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if (a != b)
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return false;
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}
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return true;
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}
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static bool is_valid_key(string_span_t s)
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{
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if (s.len != 44 || s.s[43] != '=')
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return false;
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for (size_t i = 0; i < 43; ++i) {
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if (!is_decimal(s.s[i]) && !is_alphabet(s.s[i]) &&
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s.s[i] != '/' && s.s[i] != '+')
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return false;
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}
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return true;
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}
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static bool is_valid_hostname(string_span_t s)
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{
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size_t num_digit = 0, num_entity = s.len;
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if (s.len > 63 || !s.len)
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return false;
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if (s.s[0] == '-' || s.s[s.len - 1] == '-')
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return false;
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if (s.s[0] == '.' || s.s[s.len - 1] == '.')
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return false;
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for (size_t i = 0; i < s.len; ++i) {
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if (is_decimal(s.s[i])) {
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++num_digit;
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continue;
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}
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if (s.s[i] == '.') {
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--num_entity;
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continue;
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}
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if (!is_alphabet(s.s[i]) && s.s[i] != '-')
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return false;
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if (i && s.s[i] == '.' && s.s[i - 1] == '.')
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return false;
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}
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return num_digit != num_entity;
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}
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static bool is_valid_ipv4(string_span_t s)
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{
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for (size_t j, i = 0, pos = 0; i < 4 && pos < s.len; ++i) {
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uint32_t val = 0;
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for (j = 0; j < 3 && pos + j < s.len && is_decimal(s.s[pos + j]); ++j)
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val = 10 * val + s.s[pos + j] - '0';
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if (j == 0 || (j > 1 && s.s[pos] == '0') || val > 255)
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return false;
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if (pos + j == s.len && i == 3)
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return true;
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if (s.s[pos + j] != '.')
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return false;
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pos += j + 1;
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}
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return false;
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}
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static bool is_valid_ipv6(string_span_t s)
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{
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size_t pos = 0;
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bool seen_colon = false;
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if (s.len < 2)
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return false;
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if (s.s[pos] == ':' && s.s[++pos] != ':')
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return false;
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if (s.s[s.len - 1] == ':' && s.s[s.len - 2] != ':')
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return false;
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for (size_t j, i = 0; pos < s.len; ++i) {
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if (s.s[pos] == ':' && !seen_colon) {
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seen_colon = true;
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if (++pos == s.len)
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break;
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if (i == 7)
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return false;
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continue;
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}
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for (j = 0; j < 4 && pos + j < s.len && is_hexadecimal(s.s[pos + j]); ++j);
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if (j == 0)
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return false;
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if (pos + j == s.len && (seen_colon || i == 7))
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break;
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if (i == 7)
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return false;
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if (s.s[pos + j] != ':') {
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if (s.s[pos + j] != '.' || (i < 6 && !seen_colon))
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return false;
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return is_valid_ipv4((string_span_t){ s.s + pos, s.len - pos });
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}
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pos += j + 1;
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}
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return true;
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}
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static bool is_valid_uint(string_span_t s, bool support_hex, uint64_t min, uint64_t max)
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{
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uint64_t val = 0;
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/* Bound this around 32 bits, so that we don't have to write overflow logic. */
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if (s.len > 10 || !s.len)
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return false;
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if (support_hex && s.len > 2 && s.s[0] == '0' && s.s[1] == 'x') {
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for (size_t i = 2; i < s.len; ++i) {
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if (s.s[i] - '0' < 10)
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val = 16 * val + (s.s[i] - '0');
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else if ((s.s[i] | 32) - 'a' < 6)
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val = 16 * val + (s.s[i] | 32) - 'a' + 10;
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else
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return false;
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}
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} else {
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for (size_t i = 0; i < s.len; ++i) {
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if (!is_decimal(s.s[i]))
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return false;
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val = 10 * val + s.s[i] - '0';
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}
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}
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return val <= max && val >= min;
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}
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static bool is_valid_port(string_span_t s)
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{
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return is_valid_uint(s, false, 0, 65535);
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}
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static bool is_valid_mtu(string_span_t s)
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{
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return is_valid_uint(s, false, 576, 65535);
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||||
}
|
||||
|
||||
static bool is_valid_persistentkeepalive(string_span_t s)
|
||||
{
|
||||
if (is_same(s, "off"))
|
||||
return true;
|
||||
return is_valid_uint(s, false, 0, 65535);
|
||||
}
|
||||
|
||||
#ifndef MOBILE_WGQUICK_SUBSET
|
||||
|
||||
static bool is_valid_fwmark(string_span_t s)
|
||||
{
|
||||
if (is_same(s, "off"))
|
||||
return true;
|
||||
return is_valid_uint(s, true, 0, 4294967295);
|
||||
}
|
||||
|
||||
static bool is_valid_table(string_span_t s)
|
||||
{
|
||||
if (is_same(s, "auto"))
|
||||
return true;
|
||||
if (is_same(s, "off"))
|
||||
return true;
|
||||
/* This pretty much invalidates the other checks, but rt_names.c's
|
||||
* fread_id_name does no validation aside from this. */
|
||||
if (s.len < 512)
|
||||
return true;
|
||||
return is_valid_uint(s, false, 0, 4294967295);
|
||||
}
|
||||
|
||||
static bool is_valid_saveconfig(string_span_t s)
|
||||
{
|
||||
return is_same(s, "true") || is_same(s, "false");
|
||||
}
|
||||
|
||||
static bool is_valid_prepostupdown(string_span_t s)
|
||||
{
|
||||
/* It's probably not worthwhile to try to validate a bash expression.
|
||||
* So instead we just demand non-zero length. */
|
||||
return s.len;
|
||||
}
|
||||
#endif
|
||||
|
||||
static bool is_valid_scope(string_span_t s)
|
||||
{
|
||||
if (s.len > 64 || !s.len)
|
||||
return false;
|
||||
for (size_t i = 0; i < s.len; ++i) {
|
||||
if (!is_alphabet(s.s[i]) && !is_decimal(s.s[i]) &&
|
||||
s.s[i] != '_' && s.s[i] != '=' && s.s[i] != '+' &&
|
||||
s.s[i] != '.' && s.s[i] != '-')
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool is_valid_endpoint(string_span_t s)
|
||||
{
|
||||
|
||||
if (!s.len)
|
||||
return false;
|
||||
|
||||
if (s.s[0] == '[') {
|
||||
bool seen_scope = false;
|
||||
string_span_t hostspan = { s.s + 1, 0 };
|
||||
|
||||
for (size_t i = 1; i < s.len; ++i) {
|
||||
if (s.s[i] == '%') {
|
||||
if (seen_scope)
|
||||
return false;
|
||||
seen_scope = true;
|
||||
if (!is_valid_ipv6(hostspan))
|
||||
return false;
|
||||
hostspan = (string_span_t){ s.s + i + 1, 0 };
|
||||
} else if (s.s[i] == ']') {
|
||||
if (seen_scope) {
|
||||
if (!is_valid_scope(hostspan))
|
||||
return false;
|
||||
} else if (!is_valid_ipv6(hostspan)) {
|
||||
return false;
|
||||
}
|
||||
if (i == s.len - 1 || s.s[i + 1] != ':')
|
||||
return false;
|
||||
return is_valid_port((string_span_t){ s.s + i + 2, s.len - i - 2 });
|
||||
} else {
|
||||
++hostspan.len;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
for (size_t i = 0; i < s.len; ++i) {
|
||||
if (s.s[i] == ':') {
|
||||
string_span_t host = { s.s, i }, port = { s.s + i + 1, s.len - i - 1};
|
||||
return is_valid_port(port) && (is_valid_ipv4(host) || is_valid_hostname(host));
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool is_valid_network(string_span_t s)
|
||||
{
|
||||
for (size_t i = 0; i < s.len; ++i) {
|
||||
if (s.s[i] == '/') {
|
||||
string_span_t ip = { s.s, i }, cidr = { s.s + i + 1, s.len - i - 1};
|
||||
uint16_t cidrval = 0;
|
||||
|
||||
if (cidr.len > 3 || !cidr.len)
|
||||
return false;
|
||||
|
||||
for (size_t j = 0; j < cidr.len; ++j) {
|
||||
if (!is_decimal(cidr.s[j]))
|
||||
return false;
|
||||
cidrval = 10 * cidrval + cidr.s[j] - '0';
|
||||
}
|
||||
if (is_valid_ipv4(ip))
|
||||
return cidrval <= 32;
|
||||
else if (is_valid_ipv6(ip))
|
||||
return cidrval <= 128;
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return is_valid_ipv4(s) || is_valid_ipv6(s);
|
||||
}
|
||||
|
||||
static bool is_valid_dns(string_span_t s)
|
||||
{
|
||||
return is_valid_ipv4(s) || is_valid_ipv6(s);
|
||||
}
|
||||
|
||||
enum field {
|
||||
InterfaceSection,
|
||||
PrivateKey,
|
||||
ListenPort,
|
||||
Address,
|
||||
DNS,
|
||||
MTU,
|
||||
#ifndef MOBILE_WGQUICK_SUBSET
|
||||
FwMark,
|
||||
Table,
|
||||
PreUp, PostUp, PreDown, PostDown,
|
||||
SaveConfig,
|
||||
#endif
|
||||
|
||||
PeerSection,
|
||||
PublicKey,
|
||||
PresharedKey,
|
||||
AllowedIPs,
|
||||
Endpoint,
|
||||
PersistentKeepalive,
|
||||
|
||||
Invalid
|
||||
};
|
||||
|
||||
static enum field section_for_field(enum field t)
|
||||
{
|
||||
if (t > InterfaceSection && t < PeerSection)
|
||||
return InterfaceSection;
|
||||
if (t > PeerSection && t < Invalid)
|
||||
return PeerSection;
|
||||
return Invalid;
|
||||
}
|
||||
|
||||
static enum field get_field(string_span_t s)
|
||||
{
|
||||
#define check_enum(t) do { if (is_caseless_same(s, #t)) return t; } while (0)
|
||||
check_enum(PrivateKey);
|
||||
check_enum(ListenPort);
|
||||
check_enum(Address);
|
||||
check_enum(DNS);
|
||||
check_enum(MTU);
|
||||
check_enum(PublicKey);
|
||||
check_enum(PresharedKey);
|
||||
check_enum(AllowedIPs);
|
||||
check_enum(Endpoint);
|
||||
check_enum(PersistentKeepalive);
|
||||
#ifndef MOBILE_WGQUICK_SUBSET
|
||||
check_enum(FwMark);
|
||||
check_enum(Table);
|
||||
check_enum(PreUp);
|
||||
check_enum(PostUp);
|
||||
check_enum(PreDown);
|
||||
check_enum(PostDown);
|
||||
check_enum(SaveConfig);
|
||||
#endif
|
||||
return Invalid;
|
||||
#undef check_enum
|
||||
}
|
||||
|
||||
static enum field get_sectiontype(string_span_t s)
|
||||
{
|
||||
if (is_caseless_same(s, "[Peer]"))
|
||||
return PeerSection;
|
||||
if (is_caseless_same(s, "[Interface]"))
|
||||
return InterfaceSection;
|
||||
return Invalid;
|
||||
}
|
||||
|
||||
struct highlight_span_array {
|
||||
size_t len, capacity;
|
||||
struct highlight_span *spans;
|
||||
};
|
||||
|
||||
/* A useful OpenBSD-ism. */
|
||||
static void *realloc_array(void *optr, size_t nmemb, size_t size)
|
||||
{
|
||||
if ((nmemb >= (size_t)1 << (sizeof(size_t) * 4) ||
|
||||
size >= (size_t)1 << (sizeof(size_t) * 4)) &&
|
||||
nmemb > 0 && SIZE_MAX / nmemb < size) {
|
||||
errno = ENOMEM;
|
||||
return NULL;
|
||||
}
|
||||
return realloc(optr, size * nmemb);
|
||||
}
|
||||
|
||||
static bool append_highlight_span(struct highlight_span_array *a, const char *o, string_span_t s, enum highlight_type t)
|
||||
{
|
||||
if (!s.len)
|
||||
return true;
|
||||
if (a->len >= a->capacity) {
|
||||
struct highlight_span *resized;
|
||||
|
||||
a->capacity = a->capacity ? a->capacity * 2 : 64;
|
||||
resized = realloc_array(a->spans, a->capacity, sizeof(*resized));
|
||||
if (!resized) {
|
||||
free(a->spans);
|
||||
memset(a, 0, sizeof(*a));
|
||||
return false;
|
||||
}
|
||||
a->spans = resized;
|
||||
}
|
||||
a->spans[a->len++] = (struct highlight_span){ t, s.s - o, s.len };
|
||||
return true;
|
||||
}
|
||||
|
||||
static void highlight_multivalue_value(struct highlight_span_array *ret, const string_span_t parent, const string_span_t s, enum field section)
|
||||
{
|
||||
switch (section) {
|
||||
case DNS:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_dns(s) ? HighlightIP : HighlightError);
|
||||
break;
|
||||
case Address:
|
||||
case AllowedIPs: {
|
||||
size_t slash;
|
||||
|
||||
if (!is_valid_network(s)) {
|
||||
append_highlight_span(ret, parent.s, s, HighlightError);
|
||||
break;
|
||||
}
|
||||
for (slash = 0; slash < s.len; ++slash) {
|
||||
if (s.s[slash] == '/')
|
||||
break;
|
||||
}
|
||||
if (slash == s.len) {
|
||||
append_highlight_span(ret, parent.s, s, HighlightIP);
|
||||
} else {
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s, slash }, HighlightIP);
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s + slash, 1 }, HighlightDelimiter);
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s + slash + 1, s.len - slash - 1 }, HighlightCidr);
|
||||
}
|
||||
break;
|
||||
}
|
||||
default:
|
||||
append_highlight_span(ret, parent.s, s, HighlightError);
|
||||
}
|
||||
}
|
||||
|
||||
static void highlight_multivalue(struct highlight_span_array *ret, const string_span_t parent, const string_span_t s, enum field section)
|
||||
{
|
||||
string_span_t current_span = { s.s, 0 };
|
||||
size_t len_at_last_space = 0;
|
||||
|
||||
for (size_t i = 0; i < s.len; ++i) {
|
||||
if (s.s[i] == ',') {
|
||||
current_span.len = len_at_last_space;
|
||||
highlight_multivalue_value(ret, parent, current_span, section);
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s + i, 1 }, HighlightDelimiter);
|
||||
len_at_last_space = 0;
|
||||
current_span = (string_span_t){ s.s + i + 1, 0 };
|
||||
} else if (s.s[i] == ' ' || s.s[i] == '\t') {
|
||||
if (&s.s[i] == current_span.s && !current_span.len)
|
||||
++current_span.s;
|
||||
else
|
||||
++current_span.len;
|
||||
} else {
|
||||
len_at_last_space = ++current_span.len;
|
||||
}
|
||||
}
|
||||
current_span.len = len_at_last_space;
|
||||
if (current_span.len)
|
||||
highlight_multivalue_value(ret, parent, current_span, section);
|
||||
else if (ret->spans[ret->len - 1].type == HighlightDelimiter)
|
||||
ret->spans[ret->len - 1].type = HighlightError;
|
||||
}
|
||||
|
||||
static void highlight_value(struct highlight_span_array *ret, const string_span_t parent, const string_span_t s, enum field section)
|
||||
{
|
||||
switch (section) {
|
||||
case PrivateKey:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_key(s) ? HighlightPrivateKey : HighlightError);
|
||||
break;
|
||||
case PublicKey:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_key(s) ? HighlightPublicKey : HighlightError);
|
||||
break;
|
||||
case PresharedKey:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_key(s) ? HighlightPresharedKey : HighlightError);
|
||||
break;
|
||||
case MTU:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_mtu(s) ? HighlightMTU : HighlightError);
|
||||
break;
|
||||
#ifndef MOBILE_WGQUICK_SUBSET
|
||||
case SaveConfig:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_saveconfig(s) ? HighlightSaveConfig : HighlightError);
|
||||
break;
|
||||
case FwMark:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_fwmark(s) ? HighlightFwMark : HighlightError);
|
||||
break;
|
||||
case Table:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_table(s) ? HighlightTable : HighlightError);
|
||||
break;
|
||||
case PreUp:
|
||||
case PostUp:
|
||||
case PreDown:
|
||||
case PostDown:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_prepostupdown(s) ? HighlightCmd : HighlightError);
|
||||
break;
|
||||
#endif
|
||||
case ListenPort:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_port(s) ? HighlightPort : HighlightError);
|
||||
break;
|
||||
case PersistentKeepalive:
|
||||
append_highlight_span(ret, parent.s, s, is_valid_persistentkeepalive(s) ? HighlightKeepalive : HighlightError);
|
||||
break;
|
||||
case Endpoint: {
|
||||
size_t colon;
|
||||
|
||||
if (!is_valid_endpoint(s)) {
|
||||
append_highlight_span(ret, parent.s, s, HighlightError);
|
||||
break;
|
||||
}
|
||||
for (colon = s.len; colon --> 0;) {
|
||||
if (s.s[colon] == ':')
|
||||
break;
|
||||
}
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s, colon }, HighlightHost);
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s + colon, 1 }, HighlightDelimiter);
|
||||
append_highlight_span(ret, parent.s, (string_span_t){ s.s + colon + 1, s.len - colon - 1 }, HighlightPort);
|
||||
break;
|
||||
}
|
||||
case Address:
|
||||
case DNS:
|
||||
case AllowedIPs:
|
||||
highlight_multivalue(ret, parent, s, section);
|
||||
break;
|
||||
default:
|
||||
append_highlight_span(ret, parent.s, s, HighlightError);
|
||||
}
|
||||
}
|
||||
|
||||
struct highlight_span *highlight_config(const char *config)
|
||||
{
|
||||
struct highlight_span_array ret = { 0 };
|
||||
const string_span_t s = { config, strlen(config) };
|
||||
string_span_t current_span = { s.s, 0 };
|
||||
enum field current_section = Invalid, current_field = Invalid;
|
||||
enum { OnNone, OnKey, OnValue, OnComment, OnSection } state = OnNone;
|
||||
size_t len_at_last_space = 0, equals_location = 0;
|
||||
|
||||
for (size_t i = 0; i <= s.len; ++i) {
|
||||
if (i == s.len || s.s[i] == '\n' || (state != OnComment && s.s[i] == '#')) {
|
||||
if (state == OnKey) {
|
||||
current_span.len = len_at_last_space;
|
||||
append_highlight_span(&ret, s.s, current_span, HighlightError);
|
||||
} else if (state == OnValue) {
|
||||
if (current_span.len) {
|
||||
append_highlight_span(&ret, s.s, (string_span_t){ s.s + equals_location, 1 }, HighlightDelimiter);
|
||||
current_span.len = len_at_last_space;
|
||||
highlight_value(&ret, s, current_span, current_field);
|
||||
} else {
|
||||
append_highlight_span(&ret, s.s, (string_span_t){ s.s + equals_location, 1 }, HighlightError);
|
||||
}
|
||||
} else if (state == OnSection) {
|
||||
current_span.len = len_at_last_space;
|
||||
current_section = get_sectiontype(current_span);
|
||||
append_highlight_span(&ret, s.s, current_span, current_section == Invalid ? HighlightError : HighlightSection);
|
||||
} else if (state == OnComment) {
|
||||
append_highlight_span(&ret, s.s, current_span, HighlightComment);
|
||||
}
|
||||
if (i == s.len)
|
||||
break;
|
||||
len_at_last_space = 0;
|
||||
current_field = Invalid;
|
||||
if (s.s[i] == '#') {
|
||||
current_span = (string_span_t){ s.s + i, 1 };
|
||||
state = OnComment;
|
||||
} else {
|
||||
current_span = (string_span_t){ s.s + i + 1, 0 };
|
||||
state = OnNone;
|
||||
}
|
||||
} else if (state == OnComment) {
|
||||
++current_span.len;
|
||||
} else if (s.s[i] == ' ' || s.s[i] == '\t') {
|
||||
if (&s.s[i] == current_span.s && !current_span.len)
|
||||
++current_span.s;
|
||||
else
|
||||
++current_span.len;
|
||||
} else if (s.s[i] == '=' && state == OnKey) {
|
||||
current_span.len = len_at_last_space;
|
||||
current_field = get_field(current_span);
|
||||
enum field section = section_for_field(current_field);
|
||||
if (section == Invalid || current_field == Invalid || section != current_section)
|
||||
append_highlight_span(&ret, s.s, current_span, HighlightError);
|
||||
else
|
||||
append_highlight_span(&ret, s.s, current_span, HighlightField);
|
||||
equals_location = i;
|
||||
current_span = (string_span_t){ s.s + i + 1, 0 };
|
||||
state = OnValue;
|
||||
} else {
|
||||
if (state == OnNone)
|
||||
state = s.s[i] == '[' ? OnSection : OnKey;
|
||||
len_at_last_space = ++current_span.len;
|
||||
}
|
||||
}
|
||||
|
||||
append_highlight_span(&ret, s.s, (string_span_t){ s.s, -1 }, HighlightEnd);
|
||||
return ret.spans;
|
||||
}
|
||||
|
|
@ -0,0 +1,37 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||||
*/
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
enum highlight_type {
|
||||
HighlightSection,
|
||||
HighlightField,
|
||||
HighlightPrivateKey,
|
||||
HighlightPublicKey,
|
||||
HighlightPresharedKey,
|
||||
HighlightIP,
|
||||
HighlightCidr,
|
||||
HighlightHost,
|
||||
HighlightPort,
|
||||
HighlightMTU,
|
||||
HighlightKeepalive,
|
||||
HighlightComment,
|
||||
HighlightDelimiter,
|
||||
#ifndef MOBILE_WGQUICK_SUBSET
|
||||
HighlightTable,
|
||||
HighlightFwMark,
|
||||
HighlightSaveConfig,
|
||||
HighlightCmd,
|
||||
#endif
|
||||
HighlightError,
|
||||
HighlightEnd
|
||||
};
|
||||
|
||||
struct highlight_span {
|
||||
enum highlight_type type;
|
||||
size_t start, len;
|
||||
};
|
||||
|
||||
struct highlight_span *highlight_config(const char *config);
|
||||
Reference in New Issue