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transmission/libtransmission/clients.cc

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// This file Copyright © 2008-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
/* thanks amc1! */
#include <algorithm>
#include <array>
#include <cctype> /* isprint() */
#include <cstdlib> /* strtol() */
#include <cstring>
#include <optional>
#include <string_view>
#include <tuple>
#include <utility>
#include <vector>
#include <fmt/format.h>
#include "transmission.h"
#include "clients.h"
#include "utils.h"
using namespace std::literals; // "foo"sv
namespace
{
constexpr std::pair<char*, size_t> buf_append(char* buf, size_t buflen, char ch)
{
if (buflen >= 2)
{
*buf++ = ch;
}
*buf = '\0';
return { buf, buflen - 1 };
}
constexpr std::pair<char*, size_t> buf_append(char* buf, size_t buflen, std::string_view name)
{
auto const len = std::min(buflen - 1, std::size(name));
for (size_t i = 0; i < len; ++i)
{
*buf++ = name[i];
}
*buf = '\0';
return { buf, buflen - len };
}
constexpr std::pair<char*, size_t> buf_append(char* buf, size_t buflen, int n)
{
auto mybuf = std::array<char, 32>{};
auto const end = std::data(mybuf) + std::size(mybuf);
auto constexpr base = 10;
auto* ptr = end;
while ((n / base) > 0)
{
*--ptr = char('0' + (n % base));
n /= base;
}
*--ptr = char('0' + (n % base));
return buf_append(buf, buflen, std::string_view(ptr, end - ptr));
}
template<typename T, typename... ArgTypes>
constexpr std::pair<char*, size_t> buf_append(char* buf, size_t buflen, T t, ArgTypes... args)
{
std::tie(buf, buflen) = buf_append(buf, buflen, t);
return buf_append(buf, buflen, args...);
}
constexpr std::string_view charint(char ch)
{
switch (ch)
{
case '0':
return "0"sv;
case '1':
return "1"sv;
case '2':
return "2"sv;
case '3':
return "3"sv;
case '4':
return "4"sv;
case '5':
return "5"sv;
case '6':
return "6"sv;
case '7':
return "7"sv;
case '8':
return "8"sv;
case '9':
return "9"sv;
case 'a':
case 'A':
return "10"sv;
case 'b':
case 'B':
return "11"sv;
case 'c':
case 'C':
return "12"sv;
case 'd':
case 'D':
return "13"sv;
case 'e':
case 'E':
return "14"sv;
case 'f':
case 'F':
return "15"sv;
case 'g':
case 'G':
return "16"sv;
case 'h':
case 'H':
return "17"sv;
case 'i':
case 'I':
return "18"sv;
case 'j':
case 'J':
return "19"sv;
case 'k':
case 'K':
return "20"sv;
case 'l':
case 'L':
return "21"sv;
case 'm':
case 'M':
return "22"sv;
case 'n':
case 'N':
return "23"sv;
case 'o':
case 'O':
return "24"sv;
case 'p':
case 'P':
return "25"sv;
case 'q':
case 'Q':
return "26"sv;
case 'r':
case 'R':
return "27"sv;
case 's':
case 'S':
return "28"sv;
case 't':
case 'T':
return "29"sv;
case 'u':
case 'U':
return "30"sv;
case 'v':
case 'V':
return "31"sv;
case 'w':
case 'W':
return "32"sv;
case 'x':
case 'X':
return "33"sv;
case 'y':
case 'Y':
return "34"sv;
case 'z':
case 'Z':
return "35"sv;
default:
return "x"sv;
}
}
int strint(void const* pch, int span, int base = 0)
{
char tmp[64];
memcpy(tmp, pch, span);
tmp[span] = '\0';
return strtol(tmp, nullptr, base);
}
constexpr std::string_view getMnemonicEnd(uint8_t ch)
{
switch (ch)
{
case 'b':
case 'B':
return " (Beta)"sv;
case 'd':
return " (Debug)"sv;
case 'x':
case 'X':
case 'Z':
return " (Dev)"sv;
default:
return ""sv;
}
}
void two_major_two_minor_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
std::tie(buf, buflen) = buf_append(buf, buflen, name, ' ', strint(&id[3], 2), '.');
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("{:02d}"), strint(&id[5], 2)).out = '\0';
}
// Shad0w with his experimental BitTorrent implementation and BitTornado
// introduced peer ids that begin with a character which is``T`` in the
// case of BitTornado followed by up to five ascii characters for version
// number, padded with dashes if less than 5, followed by ---. The ascii
// characters denoting version are limited to the following characters:
// 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-
// For example: 'S58B-----'... for Shadow's 5.8.11
std::optional<size_t> get_shad0w_int(char ch)
{
auto constexpr Str = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-"sv;
if (auto const pos = Str.find(ch); pos != std::string_view::npos)
{
return pos;
}
return {};
}
bool decodeShad0wClient(char* buf, size_t buflen, std::string_view in)
{
auto const* const buf_in = buf;
auto peer_id = std::string_view{ std::data(in), 9 };
if (std::size(peer_id) != 9 || peer_id[6] != '-' || peer_id[7] != '-' || peer_id[8] != '-')
{
return false;
}
while (!std::empty(peer_id) && peer_id.back() == '-')
{
peer_id.remove_suffix(1);
}
auto vals = std::vector<int>{};
while (std::size(peer_id) > 1)
{
auto const num = get_shad0w_int(peer_id.back());
if (!num)
{
return false;
}
vals.push_back(*num);
peer_id.remove_suffix(1);
}
auto name = std::string_view{};
switch (peer_id.front())
{
case 'A':
name = "ABC"sv;
break;
case 'O':
name = "Osprey";
break;
case 'Q':
name = "BTQueue";
break;
case 'R':
name = "Tribler";
break;
case 'S':
name = "Shad0w";
break;
case 'T':
name = "BitTornado";
break;
case 'U':
name = "UPnP NAT Bit Torrent";
break;
default:
return false;
}
std::tie(buf, buflen) = buf_append(buf, buflen, name, ' ');
std::for_each(
std::rbegin(vals),
std::rend(vals),
[&buf, &buflen](int num) { std::tie(buf, buflen) = buf_append(buf, buflen, num, '.'); });
if (buf > buf_in)
{
buf[-1] = '\0'; // remove trailing '.'
}
return true;
}
bool decodeBitCometClient(char* buf, size_t buflen, std::string_view peer_id)
{
// BitComet produces peer ids that consists of four ASCII characters exbc,
// followed by two bytes x and y, followed by random characters. The version
// number is x in decimal before the decimal point and y as two decimal
// digits after the decimal point. BitLord uses the same scheme, but adds
// LORD after the version bytes. An unofficial patch for BitComet once
// replaced exbc with FUTB. The encoding for BitComet Peer IDs changed
// to Azureus-style as of BitComet version 0.59.
auto mod = std::string_view{};
auto const lead = std::string_view{ std::data(peer_id), std::min(std::size(peer_id), size_t{ 4 }) };
if (lead == "exbc")
{
mod = "";
}
else if (lead == "FUTB")
{
mod = "(Solidox Mod) ";
}
else if (lead == "xUTB"sv)
{
mod = "(Mod 2) ";
}
else
{
return false;
}
bool const is_bitlord = std::string_view(std::data(peer_id) + 6, 4) == "LORD"sv;
auto const name = is_bitlord ? "BitLord"sv : "BitComet"sv;
int const major = uint8_t(peer_id[4]);
int const minor = uint8_t(peer_id[5]);
std::tie(buf, buflen) = buf_append(buf, buflen, name, ' ', mod, major, '.');
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("{:02d}"), minor).out = '\0';
return true;
}
using format_func = void (*)(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id);
constexpr void three_digit_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]), '.', charint(id[5]));
}
constexpr void four_digit_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]), '.', charint(id[5]), '.', charint(id[6]));
}
void no_version_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t /*id*/)
{
buf_append(buf, buflen, name);
}
// specific clients
constexpr void amazon_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[5], '.', id[7]);
}
constexpr void aria2_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
if (id[4] == '-' && id[6] == '-' && id[8] == '-')
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[5], '.', id[7]);
}
else if (id[4] == '-' && id[7] == '-' && id[9] == '-')
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[5], id[6], '.', id[8]);
}
else
{
buf_append(buf, buflen, name);
}
}
constexpr void bitbuddy_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[4], id[5], id[6]);
}
constexpr void bitlord_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[4], '.', id[5], '-', std::string_view(&id[6], 3));
}
constexpr void bitrocket_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[4], ' ', '(', id[5], id[6], ')');
}
void bittorrent_dna_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
std::tie(buf, buflen) = buf_append(buf, buflen, name, ' ');
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("{:d}.{:d}.{:d}"), strint(&id[3], 2), strint(&id[5], 2), strint(&id[7], 2))
.out = '\0';
}
void bits_on_wheels_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
// Bits on Wheels uses the pattern -BOWxxx-yyyyyyyyyyyy, where y is random
// (uppercase letters) and x depends on the version.
// Version 1.0.6 has xxx = A0C.
if (strncmp(&id[4], "A0B", 3) == 0)
{
buf_append(buf, buflen, name, " 1.0.5"sv);
}
else if (strncmp(&id[4], "A0C", 3) == 0)
{
buf_append(buf, buflen, name, " 1.0.6"sv);
}
else
{
buf_append(buf, buflen, name, ' ', id[4], '.', id[5], '.', id[6]);
}
}
constexpr void blizzard_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', int(id[3] + 1), int(id[4]));
}
constexpr void btpd_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', std::string_view(&id[5], 3));
}
constexpr void burst_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[5], '.', id[7], '.', id[9]);
}
constexpr void ctorrent_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]), '.', id[5], id[6]);
}
constexpr void folx_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', 'x');
}
constexpr void ktorrent_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
if (id[5] == 'D')
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]), " Dev "sv, charint(id[6]));
}
else if (id[5] == 'R')
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]), " RC "sv, charint(id[6]));
}
else
{
three_digit_formatter(buf, buflen, name, id);
}
}
constexpr void mainline_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
// Queen Bee uses Bram`s new style:
// Q1-0-0-- or Q1-10-0- followed by random bytes.
if (id[4] == '-' && id[6] == '-') // Mx-y-z--
{
buf_append(buf, buflen, name, ' ', id[1], '.', id[3], '.', id[5]);
}
else if (id[5] == '-') // Mx-yy-z-
{
buf_append(buf, buflen, name, ' ', id[1], '.', id[3], id[4], '.', id[6]);
}
else
{
buf_append(buf, buflen, name);
}
}
constexpr void mediaget_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]));
}
constexpr void mldonkey_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
// MLdonkey use the following peer_id scheme: the first characters are
// -ML followed by a dotted version then a - followed by randomness.
// e.g. -ML2.7.2-kgjjfkd
buf_append(buf, buflen, name, ' ', std::string_view(&id[3], 5));
}
constexpr void opera_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
// Opera 8 previews and Opera 9.x releases use the following peer_id
// scheme: The first two characters are OP and the next four digits equal
// the build number. All following characters are random lowercase
// hexdecimal digits.
buf_append(buf, buflen, name, ' ', std::string_view(&id[2], 4));
}
constexpr void picotorrent_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[3]), '.', id[4], id[5], '.', charint(id[6]));
}
constexpr void plus_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[4], '.', id[5], id[6]);
}
constexpr void qvod_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', charint(id[4]), '.', charint(id[5]), '.', charint(id[6]), '.', charint(id[7]));
}
void transmission_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
std::tie(buf, buflen) = buf_append(buf, buflen, name, ' ');
if (strncmp(&id[3], "000", 3) == 0) // very old client style: -TR0006- is 0.6
{
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("0.{:c}"), id[6]).out = '\0';
}
else if (strncmp(&id[3], "00", 2) == 0) // previous client style: -TR0072- is 0.72
{
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("0.{:02d}"), strint(&id[5], 2)).out = '\0';
}
else // current client style: -TR111Z- is 1.11+ */
{
*fmt::format_to_n(
buf,
buflen - 1,
FMT_STRING("{:d}.{:02d}{:s}"),
strint(&id[3], 1),
strint(&id[4], 2),
(id[6] == 'Z' || id[6] == 'X') ? "+" : "")
.out = '\0';
}
}
void utorrent_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
if (id[7] == '-')
{
buf_append(
buf,
buflen,
name,
' ',
strint(&id[3], 1, 16),
'.',
strint(&id[4], 1, 16),
'.',
strint(&id[5], 1, 16),
getMnemonicEnd(id[6]));
}
else // uTorrent replaces the trailing dash with an extra digit for longer version numbers
{
buf_append(
buf,
buflen,
name,
' ',
strint(&id[3], 1, 16),
'.',
strint(&id[4], 1, 16),
'.',
strint(&id[5], 2, 10),
getMnemonicEnd(id[7]));
}
}
constexpr void xbt_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[4], '.', id[5], getMnemonicEnd(id[6]));
}
constexpr void xfplay_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
if (id[6] == '0')
{
three_digit_formatter(buf, buflen, name, id);
}
else
{
buf_append(buf, buflen, name, ' ', id[3], '.', id[4], '.', id[5], id[6]);
}
}
void xtorrent_formatter(char* buf, size_t buflen, std::string_view name, tr_peer_id_t id)
{
std::tie(buf, buflen) = buf_append(buf, buflen, name, ' ', charint(id[3]), '.', charint(id[4]), " ("sv);
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("{:d}"), strint(&id[5], 2)).out = '\0';
}
struct Client
{
std::string_view begins_with;
std::string_view name;
format_func formatter;
};
auto constexpr Clients = std::array<Client, 127>{ {
{ "-AG", "Ares", four_digit_formatter },
{ "-AR", "Arctic", four_digit_formatter },
{ "-AT", "Artemis", four_digit_formatter },
{ "-AV", "Avicora", four_digit_formatter },
{ "-AX", "BitPump", two_major_two_minor_formatter },
{ "-AZ", "Azureus / Vuze", four_digit_formatter },
{ "-A~", "Ares", three_digit_formatter },
{ "-BB", "BitBuddy", bitbuddy_formatter },
{ "-BC", "BitComet", two_major_two_minor_formatter },
{ "-BE", "BitTorrent SDK", four_digit_formatter },
{ "-BF", "BitFlu", no_version_formatter },
{ "-BG", "BTGetit", four_digit_formatter },
{ "-BH", "BitZilla", four_digit_formatter },
{ "-BI", "BiglyBT", four_digit_formatter },
{ "-BL", "BitLord", bitlord_formatter },
{ "-BM", "BitMagnet", four_digit_formatter },
{ "-BN", "Baidu Netdisk", no_version_formatter },
{ "-BOW", "Bits on Wheels", bits_on_wheels_formatter },
{ "-BP", "BitTorrent Pro (Azureus + Spyware)", four_digit_formatter },
{ "-BR", "BitRocket", bitrocket_formatter },
{ "-BS", "BTSlave", four_digit_formatter },
{ "-BT", "BitTorrent", utorrent_formatter },
{ "-BW", "BitWombat", four_digit_formatter },
{ "-BX", "BittorrentX", four_digit_formatter },
{ "-CD", "Enhanced CTorrent", two_major_two_minor_formatter },
{ "-CT", "CTorrent", ctorrent_formatter },
{ "-DE", "Deluge", four_digit_formatter },
{ "-DP", "Propagate Data Client", four_digit_formatter },
{ "-EB", "EBit", four_digit_formatter },
{ "-ES", "Electric Sheep", three_digit_formatter },
{ "-FC", "FileCroc", four_digit_formatter },
{ "-FD", "Free Download Manager", three_digit_formatter },
{ "-FG", "FlashGet", two_major_two_minor_formatter },
{ "-FL", "Folx", folx_formatter },
{ "-FT", "FoxTorrent/RedSwoosh", four_digit_formatter },
{ "-FW", "FrostWire", three_digit_formatter },
{ "-FX", "Freebox", four_digit_formatter },
{ "-G3", "G3 Torrent", no_version_formatter },
{ "-GR", "GetRight", four_digit_formatter },
{ "-GS", "GSTorrent", four_digit_formatter },
{ "-HK", "Hekate", four_digit_formatter },
{ "-HL", "Halite", three_digit_formatter },
{ "-HN", "Hydranode", four_digit_formatter },
{ "-KG", "KGet", four_digit_formatter },
{ "-KT", "KTorrent", ktorrent_formatter },
{ "-LC", "LeechCraft", four_digit_formatter },
{ "-LH", "LH-ABC", four_digit_formatter },
{ "-LP", "Lphant", two_major_two_minor_formatter },
{ "-LT", "libtorrent (Rasterbar)", three_digit_formatter },
{ "-LW", "LimeWire", no_version_formatter },
{ "-MG", "MediaGet", mediaget_formatter },
{ "-MK", "Meerkat", four_digit_formatter },
{ "-ML", "MLDonkey", mldonkey_formatter },
{ "-MO", "MonoTorrent", four_digit_formatter },
{ "-MP", "MooPolice", three_digit_formatter },
{ "-MR", "Miro", four_digit_formatter },
{ "-MT", "Moonlight", four_digit_formatter },
{ "-NE", "BT Next Evolution", four_digit_formatter },
{ "-NX", "Net Transport", four_digit_formatter },
{ "-OS", "OneSwarm", four_digit_formatter },
{ "-OT", "OmegaTorrent", four_digit_formatter },
{ "-PD", "Pando", four_digit_formatter },
{ "-PI", "PicoTorrent", picotorrent_formatter },
{ "-QD", "QQDownload", four_digit_formatter },
{ "-QT", "QT 4 Torrent example", four_digit_formatter },
{ "-RS", "Rufus", four_digit_formatter },
{ "-RT", "Retriever", four_digit_formatter },
{ "-RZ", "RezTorrent", four_digit_formatter },
{ "-SB", "~Swiftbit", four_digit_formatter },
{ "-SD", "Thunder", four_digit_formatter },
{ "-SM", "SoMud", four_digit_formatter },
{ "-SP", "BitSpirit", three_digit_formatter },
{ "-SS", "SwarmScope", four_digit_formatter },
{ "-ST", "SymTorrent", four_digit_formatter },
{ "-SZ", "Shareaza", four_digit_formatter },
{ "-S~", "Shareaza", four_digit_formatter },
{ "-TN", "Torrent .NET", four_digit_formatter },
{ "-TR", "Transmission", transmission_formatter },
{ "-TS", "Torrentstorm", four_digit_formatter },
{ "-TT", "TuoTu", four_digit_formatter },
{ "-UE", "\xc2\xb5Torrent Embedded", utorrent_formatter },
{ "-UL", "uLeecher!", four_digit_formatter },
{ "-UM", "\xc2\xb5Torrent Mac", utorrent_formatter },
{ "-UT", "\xc2\xb5Torrent", utorrent_formatter },
{ "-UW", "\xc2\xb5Torrent Web", utorrent_formatter },
{ "-VG", "Vagaa", four_digit_formatter },
{ "-WS", "HTTP Seed", no_version_formatter },
{ "-WT", "BitLet", four_digit_formatter },
{ "-WT-", "BitLet", no_version_formatter },
{ "-WW", "WebTorrent", four_digit_formatter },
{ "-WY", "FireTorrent", four_digit_formatter },
{ "-XC", "Xtorrent", xtorrent_formatter },
{ "-XF", "Xfplay", xfplay_formatter },
{ "-XL", "Xunlei", four_digit_formatter },
{ "-XS", "XSwifter", four_digit_formatter },
{ "-XT", "XanTorrent", four_digit_formatter },
{ "-XX", "Xtorrent", xtorrent_formatter },
{ "-ZO", "Zona", four_digit_formatter },
{ "-ZT", "Zip Torrent", four_digit_formatter },
{ "-bk", "BitKitten (libtorrent)", four_digit_formatter },
{ "-lt", "libTorrent (Rakshasa)", three_digit_formatter },
{ "-pb", "pbTorrent", three_digit_formatter },
{ "-qB", "qBittorrent", three_digit_formatter },
{ "-st", "SharkTorrent", four_digit_formatter },
{ "10-------", "JVtorrent", no_version_formatter },
{ "346-", "TorrentTopia", no_version_formatter },
{ "A2", "aria2", aria2_formatter },
{ "AZ2500BT", "BitTyrant (Azureus Mod)", no_version_formatter },
{ "BLZ", "Blizzard Downloader", blizzard_formatter },
{ "DNA", "BitTorrent DNA", bittorrent_dna_formatter },
{ "LIME", "Limewire", no_version_formatter },
{ "M", "BitTorrent", mainline_formatter },
{ "Mbrst", "burst!", burst_formatter },
{ "OP", "Opera", opera_formatter },
{ "Pando", "Pando", no_version_formatter },
{ "Plus", "Plus!", plus_formatter },
{ "Q", "Queen Bee", mainline_formatter },
{ "QVOD", "QVOD", qvod_formatter },
{ "S3", "Amazon S3", amazon_formatter },
{ "TIX", "Tixati", two_major_two_minor_formatter },
{ "XBT", "XBT Client", xbt_formatter },
{ "a00---0", "Swarmy", no_version_formatter },
{ "a02---0", "Swarmy", no_version_formatter },
{ "aria2-", "aria2", no_version_formatter },
{ "btpd", "BT Protocol Daemon", btpd_formatter },
{ "eX", "eXeem", no_version_formatter },
{ "martini", "Martini Man", no_version_formatter },
} };
} // namespace
char* tr_clientForId(char* buf, size_t buflen, tr_peer_id_t peer_id)
{
*buf = '\0';
auto const key = std::string_view{ std::data(peer_id), std::size(peer_id) };
if (decodeShad0wClient(buf, buflen, key) || decodeBitCometClient(buf, buflen, key))
{
return buf;
}
if (peer_id[0] == '\0' && peer_id[2] == 'B' && peer_id[3] == 'S')
{
*fmt::format_to_n(buf, buflen - 1, FMT_STRING("BitSpirit {:d}"), peer_id[1] == '\0' ? 1 : int(peer_id[1])).out = '\0';
return buf;
}
struct Compare
{
bool operator()(std::string_view const& key, Client const& client) const
{
auto const key_lhs = std::string_view{ std::data(key), std::min(std::size(key), std::size(client.begins_with)) };
return key_lhs < client.begins_with;
}
bool operator()(Client const& client, std::string_view const& key) const
{
auto const key_lhs = std::string_view{ std::data(key), std::min(std::size(key), std::size(client.begins_with)) };
return client.begins_with < key_lhs;
}
};
auto eq = std::equal_range(std::begin(Clients), std::end(Clients), key, Compare{});
if (eq.first != std::end(Clients) && eq.first != eq.second)
{
eq.first->formatter(buf, buflen, eq.first->name, peer_id);
return buf;
}
// no match
if (tr_str_is_empty(buf))
{
auto out = std::array<char, 32>{};
char* walk = std::data(out);
char const* const begin = walk;
char const* const end = begin + std::size(out);
for (size_t i = 0; i < 8; ++i)
{
char const c = peer_id[i];
if (isprint((unsigned char)c) != 0)
{
*walk++ = c;
}
else
{
walk = fmt::format_to_n(walk, end - walk - 1, FMT_STRING("%{:02X}"), static_cast<unsigned char>(c)).out;
}
}
buf_append(buf, buflen, std::string_view(begin, walk - begin));
}
return buf;
}
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