From 5068d34c08f951a7ea6257d305a1627b09a95817 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 19:44:55 +0200 Subject: Adding upstream version 0.11.1. Signed-off-by: Daniel Baumann --- src/file_format.cc | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 src/file_format.cc (limited to 'src/file_format.cc') diff --git a/src/file_format.cc b/src/file_format.cc new file mode 100644 index 0000000..d82b78c --- /dev/null +++ b/src/file_format.cc @@ -0,0 +1,119 @@ +/** + * Copyright (c) 2020, Timothy Stack + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * * 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. + * * Neither the name of Timothy Stack nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + * + * @file file_format.hh + */ + +#include + +#include "file_format.hh" + +#include "archive_manager.hh" +#include "base/auto_fd.hh" +#include "base/fs_util.hh" +#include "base/intern_string.hh" +#include "base/lnav_log.hh" +#include "config.h" + +static bool +is_pcap_header(uint8_t* buffer) +{ + size_t offset = 0; + if (buffer[0] == 0x0a && buffer[1] == 0x0d && buffer[2] == 0x0d + && buffer[3] == 0x0a) + { + offset += sizeof(uint32_t) * 2; + if (buffer[offset + 0] == 0x1a && buffer[offset + 1] == 0x2b + && buffer[offset + 2] == 0x3c && buffer[offset + 3] == 0x4d) + { + return true; + } + + if (buffer[offset + 0] == 0x4d && buffer[offset + 1] == 0x3c + && buffer[offset + 2] == 0x2b && buffer[offset + 3] == 0x1a) + { + return true; + } + return false; + } + + if (buffer[0] == 0xa1 && buffer[1] == 0xb2 && buffer[2] == 0xc3 + && buffer[3] == 0xd4) + { + return true; + } + + if (buffer[0] == 0xd4 && buffer[1] == 0xc3 && buffer[2] == 0xb2 + && buffer[3] == 0xa1) + { + return true; + } + + if (buffer[0] == 0xa1 && buffer[1] == 0xb2 && buffer[2] == 0x3c + && buffer[3] == 0x4d) + { + return true; + } + + if (buffer[0] == 0x4d && buffer[1] == 0x3c && buffer[2] == 0xb2 + && buffer[3] == 0xa1) + { + return true; + } + + return false; +} + +file_format_t +detect_file_format(const ghc::filesystem::path& filename) +{ + if (archive_manager::is_archive(filename)) { + return file_format_t::ARCHIVE; + } + + file_format_t retval = file_format_t::UNKNOWN; + auto_fd fd; + + if ((fd = lnav::filesystem::openp(filename, O_RDONLY)) != -1) { + uint8_t buffer[32]; + ssize_t rc; + + if ((rc = read(fd, buffer, sizeof(buffer))) > 0) { + static auto SQLITE3_HEADER = "SQLite format 3"; + auto header_frag = string_fragment(buffer, 0, rc); + + if (header_frag.startswith(SQLITE3_HEADER)) { + retval = file_format_t::SQLITE_DB; + } else if (rc > 24 && is_pcap_header(buffer)) { + retval = file_format_t::PCAP; + } + } + } + + return retval; +} -- cgit v1.2.3