354 lines
8.7 KiB
C++
354 lines
8.7 KiB
C++
/*
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Copyright (c) 2003, Arvid Norberg
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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
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are met:
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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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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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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
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libtorrent/entry.hpp"
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#include "libtorrent/bencode.hpp"
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#include "libtorrent/torrent_info.hpp"
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#include "libtorrent/lazy_entry.hpp"
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#include "libtorrent/magnet_uri.hpp"
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int load_file(std::string const& filename, std::vector<char>& v, libtorrent::error_code& ec, int limit = 8000000)
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{
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ec.clear();
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FILE* f = fopen(filename.c_str(), "rb");
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if (f == NULL)
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{
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ec.assign(errno, boost::system::get_generic_category());
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return -1;
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}
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int r = fseek(f, 0, SEEK_END);
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if (r != 0)
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{
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ec.assign(errno, boost::system::get_generic_category());
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fclose(f);
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return -1;
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}
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long s = ftell(f);
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if (s < 0)
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{
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ec.assign(errno, boost::system::get_generic_category());
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fclose(f);
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return -1;
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}
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if (s > limit)
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{
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fclose(f);
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return -2;
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}
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r = fseek(f, 0, SEEK_SET);
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if (r != 0)
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{
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ec.assign(errno, boost::system::get_generic_category());
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fclose(f);
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return -1;
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}
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v.resize(s);
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if (s == 0)
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{
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fclose(f);
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return 0;
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}
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r = fread(&v[0], 1, v.size(), f);
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if (r < 0)
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{
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ec.assign(errno, boost::system::get_generic_category());
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fclose(f);
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return -1;
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}
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fclose(f);
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if (r != s) return -3;
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return 0;
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}
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int line_longer_than(libtorrent::lazy_entry const& e, int limit)
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{
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using namespace libtorrent;
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int line_len = 0;
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switch (e.type())
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{
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case lazy_entry::list_t:
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line_len += 4;
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if (line_len > limit) return -1;
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for (int i = 0; i < e.list_size(); ++i)
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{
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int ret = line_longer_than(*e.list_at(i), limit - line_len);
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if (ret == -1) return -1;
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line_len += ret + 2;
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}
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break;
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case lazy_entry::dict_t:
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line_len += 4;
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if (line_len > limit) return -1;
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for (int i = 0; i < e.dict_size(); ++i)
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{
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line_len += 4 + e.dict_at(i).first.size();
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if (line_len > limit) return -1;
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int ret = line_longer_than(*e.dict_at(i).second, limit - line_len);
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if (ret == -1) return -1;
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line_len += ret + 1;
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}
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break;
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case lazy_entry::string_t:
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line_len += 3 + e.string_length();
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break;
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case lazy_entry::int_t:
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{
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size_type val = e.int_value();
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while (val > 0)
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{
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++line_len;
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val /= 10;
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}
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line_len += 2;
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}
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break;
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case lazy_entry::none_t:
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line_len += 4;
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break;
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}
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if (line_len > limit) return -1;
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return line_len;
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}
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std::string print_entry(libtorrent::lazy_entry const& e, bool single_line = false, int indent = 0)
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{
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using namespace libtorrent;
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char indent_str[200];
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memset(indent_str, ' ', 200);
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indent_str[0] = ',';
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indent_str[1] = '\n';
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indent_str[199] = 0;
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if (indent < 197 && indent >= 0) indent_str[indent+2] = 0;
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std::string ret;
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switch (e.type())
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{
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case lazy_entry::none_t: return "none";
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case lazy_entry::int_t:
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{
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char str[100];
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snprintf(str, sizeof(str), "%" PRId64, e.int_value());
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return str;
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}
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case lazy_entry::string_t:
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{
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bool printable = true;
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char const* str = e.string_ptr();
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for (int i = 0; i < e.string_length(); ++i)
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{
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using namespace std;
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if (is_print((unsigned char)str[i])) continue;
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printable = false;
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break;
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}
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ret += "'";
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if (printable)
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{
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ret += e.string_value();
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ret += "'";
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return ret;
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}
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for (int i = 0; i < e.string_length(); ++i)
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{
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char tmp[5];
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snprintf(tmp, sizeof(tmp), "%02x", (unsigned char)str[i]);
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ret += tmp;
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}
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ret += "'";
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return ret;
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}
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case lazy_entry::list_t:
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{
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ret += '[';
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bool one_liner = line_longer_than(e, 200) != -1 || single_line;
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if (!one_liner) ret += indent_str + 1;
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for (int i = 0; i < e.list_size(); ++i)
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{
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if (i == 0 && one_liner) ret += " ";
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ret += ::print_entry(*e.list_at(i), single_line, indent + 2);
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if (i < e.list_size() - 1) ret += (one_liner?", ":indent_str);
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else ret += (one_liner?" ":indent_str+1);
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}
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ret += "]";
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return ret;
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}
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case lazy_entry::dict_t:
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{
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ret += "{";
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bool one_liner = line_longer_than(e, 200) != -1 || single_line;
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if (!one_liner) ret += indent_str+1;
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for (int i = 0; i < e.dict_size(); ++i)
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{
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if (i == 0 && one_liner) ret += " ";
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std::pair<std::string, lazy_entry const*> ent = e.dict_at(i);
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ret += "'";
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ret += ent.first;
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ret += "': ";
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ret += ::print_entry(*ent.second, single_line, indent + 2);
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if (i < e.dict_size() - 1) ret += (one_liner?", ":indent_str);
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else ret += (one_liner?" ":indent_str+1);
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}
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ret += "}";
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return ret;
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}
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}
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return ret;
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}
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int main(int argc, char* argv[])
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{
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using namespace libtorrent;
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if (argc < 2 || argc > 4)
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{
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fputs("usage: dump_torrent torrent-file [total-items-limit] [recursion-limit]\n", stderr);
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return 1;
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}
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int item_limit = 1000000;
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int depth_limit = 1000;
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if (argc > 2) item_limit = atoi(argv[2]);
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if (argc > 3) depth_limit = atoi(argv[3]);
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int size = file_size(argv[1]);
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if (size > 40 * 1000000)
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{
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fprintf(stderr, "file too big (%d), aborting\n", size);
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return 1;
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}
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std::vector<char> buf(size);
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error_code ec;
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int ret = load_file(argv[1], buf, ec, 40 * 1000000);
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if (ret != 0)
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{
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fprintf(stderr, "failed to load file: %s\n", ec.message().c_str());
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return 1;
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}
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lazy_entry e;
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int pos = -1;
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printf("decoding. recursion limit: %d total item count limit: %d\n"
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, depth_limit, item_limit);
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ret = lazy_bdecode(&buf[0], &buf[0] + buf.size(), e, ec, &pos
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, depth_limit, item_limit);
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printf("\n\n----- raw info -----\n\n%s\n", ::print_entry(e).c_str());
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if (ret != 0)
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{
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fprintf(stderr, "failed to decode: '%s' at character: %d\n", ec.message().c_str(), pos);
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return 1;
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}
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torrent_info t(e, ec);
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if (ec)
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{
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fprintf(stderr, "%s\n", ec.message().c_str());
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return 1;
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}
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e.clear();
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std::vector<char>().swap(buf);
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// print info about torrent
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printf("\n\n----- torrent file info -----\n\n"
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"nodes:\n");
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typedef std::vector<std::pair<std::string, int> > node_vec;
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node_vec const& nodes = t.nodes();
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for (node_vec::const_iterator i = nodes.begin(), end(nodes.end());
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i != end; ++i)
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{
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printf("%s: %d\n", i->first.c_str(), i->second);
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}
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puts("trackers:\n");
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for (std::vector<announce_entry>::const_iterator i = t.trackers().begin();
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i != t.trackers().end(); ++i)
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{
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printf("%2d: %s\n", i->tier, i->url.c_str());
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}
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char ih[41];
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to_hex((char const*)&t.info_hash()[0], 20, ih);
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printf("number of pieces: %d\n"
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"piece length: %d\n"
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"info hash: %s\n"
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"comment: %s\n"
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"created by: %s\n"
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"magnet link: %s\n"
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"name: %s\n"
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"number of files: %d\n"
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"files:\n"
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, t.num_pieces()
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, t.piece_length()
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, ih
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, t.comment().c_str()
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, t.creator().c_str()
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, make_magnet_uri(t).c_str()
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, t.name().c_str()
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, t.num_files());
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file_storage const& st = t.files();
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for (int i = 0; i < st.num_files(); ++i)
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{
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int first = st.map_file(i, 0, 0).piece;
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int last = st.map_file(i, (std::max)(size_type(st.file_size(i))-1, size_type(0)), 0).piece;
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int flags = st.file_flags(i);
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printf(" %8" PRIx64 " %11" PRId64 " %c%c%c%c [ %5d, %5d ] %7u %s %s %s%s\n"
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, st.file_offset(i)
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, st.file_size(i)
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, ((flags & file_storage::flag_pad_file)?'p':'-')
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, ((flags & file_storage::flag_executable)?'x':'-')
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, ((flags & file_storage::flag_hidden)?'h':'-')
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, ((flags & file_storage::flag_symlink)?'l':'-')
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, first, last
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, boost::uint32_t(st.mtime(i))
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, st.hash(i) != sha1_hash(0) ? to_hex(st.hash(i).to_string()).c_str() : ""
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, st.file_path(i).c_str()
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, (flags & file_storage::flag_symlink) ? "-> " : ""
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, (flags & file_storage::flag_symlink) ? st.symlink(i).c_str() : "");
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}
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return 0;
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}
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