torrent_handle session::add_torrent(add_torrent_params const& params, error_code& ec)
{
ec.clear();
TORRENT_SYNC_CALL_RET2(torrent_handle, add_torrent, params, boost::ref(ec));
return r;
}
address bind_to_device(io_service& ios, Socket& sock
, bool ipv4, char const* device_name, int port, error_code& ec)
{
tcp::endpoint bind_ep(address_v4::any(), port);
address ip = address::from_string(device_name, ec);
if (!ec)
{
#if TORRENT_USE_IPV6
// this is to cover the case where "0.0.0.0" is considered any IPv4 or
// IPv6 address. If we're asking to be bound to an IPv6 address and
// providing 0.0.0.0 as the device, turn it into "::0"
if (ip == address_v4::any() && !ipv4)
ip = address_v6::any();
#endif
bind_ep.address(ip);
// it appears to be an IP. Just bind to that address
sock.bind(bind_ep, ec);
return bind_ep.address();
}
ec.clear();
#ifdef SO_BINDTODEVICE
// try to use SO_BINDTODEVICE here, if that exists. If it fails,
// fall back to the mechanism we have below
sock.set_option(bind_to_device_opt(device_name), ec);
if (ec)
#endif
{
ec.clear();
// TODO: 2 this could be done more efficiently by just looking up
// the interface with the given name, maybe even with if_nametoindex()
std::vector<ip_interface> ifs = enum_net_interfaces(ios, ec);
if (ec) return bind_ep.address();
bool found = false;
for (int i = 0; i < int(ifs.size()); ++i)
{
// we're looking for a specific interface, and its address
// (which must be of the same family as the address we're
// connecting to)
if (strcmp(ifs[i].name, device_name) != 0) continue;
if (ifs[i].interface_address.is_v4() != ipv4)
continue;
bind_ep.address(ifs[i].interface_address);
found = true;
break;
}
if (!found)
{
ec = error_code(boost::system::errc::no_such_device, generic_category());
return bind_ep.address();
}
}
sock.bind(bind_ep, ec);
return bind_ep.address();
}
void parse_magnet_uri(std::string const& uri, add_torrent_params& p, error_code& ec)
{
ec.clear();
std::string name;
std::string tracker;
error_code e;
std::string display_name = url_has_argument(uri, "dn");
if (!display_name.empty()) name = unescape_string(display_name.c_str(), e);
// parse trackers out of the magnet link
std::string::size_type pos = std::string::npos;
std::string url = url_has_argument(uri, "tr", &pos);
while (pos != std::string::npos)
{
error_code e;
url = unescape_string(url, e);
if (e) continue;
p.trackers.push_back(url);
pos = uri.find("&tr=", pos);
if (pos == std::string::npos) break;
pos += 4;
url = uri.substr(pos, uri.find('&', pos) - pos);
}
std::string btih = url_has_argument(uri, "xt");
if (btih.empty())
{
ec = errors::missing_info_hash_in_uri;
return;
}
if (btih.compare(0, 9, "urn:btih:") != 0)
{
ec = errors::missing_info_hash_in_uri;
return;
}
#ifndef TORRENT_DISABLE_DHT
std::string::size_type node_pos = std::string::npos;
std::string node = url_has_argument(uri, "dht", &node_pos);
while (!node.empty())
{
std::string::size_type divider = node.find_last_of(':');
if (divider != std::string::npos)
{
int port = atoi(node.c_str()+divider+1);
if (port != 0)
p.dht_nodes.push_back(std::make_pair(node.substr(0, divider), port));
}
node_pos = uri.find("&dht=", node_pos);
if (node_pos == std::string::npos) break;
node_pos += 5;
node = uri.substr(node_pos, uri.find('&', node_pos) - node_pos);
}
#endif
sha1_hash info_hash;
if (btih.size() == 40 + 9) from_hex(&btih[9], 40, (char*)&info_hash[0]);
else info_hash.assign(base32decode(btih.substr(9)));
p.info_hash = info_hash;
if (!name.empty()) p.name = name;
}
directory_iterator::directory_iterator(const path& p, error_code& ec) noexcept {
ec.clear();
open_dir(p, ec);
if (!ec) increment(ec);
}
int load_file(std::string const& filename, std::vector<char>& v, error_code& ec, int limit = 8000000)
{
ec.clear();
FILE* f = fopen(filename.c_str(), "rb");
if (f == NULL)
{
ec.assign(errno, boost::system::get_generic_category());
return -1;
}
int r = fseek(f, 0, SEEK_END);
if (r != 0)
{
ec.assign(errno, boost::system::get_generic_category());
fclose(f);
return -1;
}
long s = ftell(f);
if (s < 0)
{
ec.assign(errno, boost::system::get_generic_category());
fclose(f);
return -1;
}
if (s > limit)
{
fclose(f);
return -2;
}
r = fseek(f, 0, SEEK_SET);
if (r != 0)
{
ec.assign(errno, boost::system::get_generic_category());
fclose(f);
return -1;
}
v.resize(s);
if (s == 0)
{
fclose(f);
return 0;
}
r = fread(&v[0], 1, v.size(), f);
if (r < 0)
{
ec.assign(errno, boost::system::get_generic_category());
fclose(f);
return -1;
}
fclose(f);
if (r != s)
{
return -3;
}
return 0;
}
void parse_magnet_uri(std::string const& uri, add_torrent_params& p, error_code& ec)
{
ec.clear();
std::string name;
{
error_code e;
std::string display_name = url_has_argument(uri, "dn");
if (!display_name.empty()) name = unescape_string(display_name.c_str(), e);
}
// parse trackers out of the magnet link
std::string::size_type pos = std::string::npos;
std::string url = url_has_argument(uri, "tr", &pos);
while (pos != std::string::npos)
{
error_code e;
url = unescape_string(url, e);
if (e) continue;
p.trackers.push_back(url);
pos = uri.find("&tr=", pos);
if (pos == std::string::npos) break;
pos += 4;
url = uri.substr(pos, uri.find('&', pos) - pos);
}
// parse web seeds out of the magnet link
pos = std::string::npos;
url = url_has_argument(uri, "ws", &pos);
while (pos != std::string::npos)
{
error_code e;
url = unescape_string(url, e);
if (e) continue;
p.url_seeds.push_back(url);
pos = uri.find("&ws=", pos);
if (pos == std::string::npos) break;
pos += 4;
url = uri.substr(pos, uri.find('&', pos) - pos);
}
std::string btih = url_has_argument(uri, "xt");
if (btih.empty())
{
ec = errors::missing_info_hash_in_uri;
return;
}
if (btih.compare(0, 9, "urn:btih:") != 0)
{
ec = errors::missing_info_hash_in_uri;
return;
}
std::string::size_type peer_pos = std::string::npos;
std::string peer = url_has_argument(uri, "x.pe", &peer_pos);
while (!peer.empty())
{
error_code e;
tcp::endpoint endp = parse_endpoint(peer, e);
if (!e)
p.peers.push_back(endp);
peer_pos = uri.find("&x.pe=", peer_pos);
if (peer_pos == std::string::npos) break;
peer_pos += 6;
peer = uri.substr(peer_pos, uri.find('&', peer_pos) - peer_pos);
}
#ifndef TORRENT_DISABLE_DHT
std::string::size_type node_pos = std::string::npos;
std::string node = url_has_argument(uri, "dht", &node_pos);
while (!node.empty())
{
std::string::size_type divider = node.find_last_of(':');
if (divider != std::string::npos)
{
int port = atoi(node.c_str() + divider + 1);
if (port != 0)
p.dht_nodes.push_back(std::make_pair(node.substr(0, divider), port));
}
node_pos = uri.find("&dht=", node_pos);
if (node_pos == std::string::npos) break;
node_pos += 5;
node = uri.substr(node_pos, uri.find('&', node_pos) - node_pos);
}
#endif
sha1_hash info_hash;
if (btih.size() == 40 + 9) aux::from_hex(&btih[9], 40, info_hash.data());
else if (btih.size() == 32 + 9)
{
std::string ih = base32decode(btih.substr(9));
if (ih.size() != 20)
{
ec = errors::invalid_info_hash;
return;
}
info_hash.assign(ih);
}
else
{
ec = errors::invalid_info_hash;
return;
}
p.info_hash = info_hash;
if (!name.empty()) p.name = name;
}
// This has to be thread safe, i.e. atomic.
// that means, on posix this has to be turned into a series of
// pwrite() calls
std::int64_t file::writev(std::int64_t file_offset, span<iovec_t const> bufs
, error_code& ec, open_mode_t flags)
{
if (m_file_handle == INVALID_HANDLE_VALUE)
{
#ifdef TORRENT_WINDOWS
ec = error_code(ERROR_INVALID_HANDLE, system_category());
#else
ec = error_code(boost::system::errc::bad_file_descriptor, generic_category());
#endif
return -1;
}
TORRENT_ASSERT((m_open_mode & open_mode::rw_mask) == open_mode::write_only
|| (m_open_mode & open_mode::rw_mask) == open_mode::read_write);
TORRENT_ASSERT(!bufs.empty());
TORRENT_ASSERT(is_open());
ec.clear();
#if TORRENT_USE_PREADV
TORRENT_UNUSED(flags);
std::int64_t ret = iov(&::pwritev, native_handle(), file_offset, bufs, ec);
#else
// there's no point in coalescing single buffer writes
if (bufs.size() == 1)
{
flags &= ~open_mode::coalesce_buffers;
}
iovec_t tmp;
if (flags & open_mode::coalesce_buffers)
{
if (!coalesce_write_buffers(bufs, tmp))
// ok, that failed, don't coalesce writes
flags &= ~open_mode::coalesce_buffers;
}
#if TORRENT_USE_PREAD
std::int64_t ret = iov(&::pwrite, native_handle(), file_offset, bufs, ec);
#else
std::int64_t ret = iov(&::write, native_handle(), file_offset, bufs, ec);
#endif
if (flags & open_mode::coalesce_buffers)
delete[] tmp.data();
#endif
#if TORRENT_USE_FDATASYNC \
&& !defined F_NOCACHE && \
!defined DIRECTIO_ON
if (m_open_mode & open_mode::no_cache)
{
if (::fdatasync(native_handle()) != 0
&& errno != EINVAL
&& errno != ENOSYS)
{
ec.assign(errno, system_category());
}
}
#endif
return ret;
}
void mapped_surface::commit_changes(const rectangle& area, error_code& ec) noexcept {
cairo_surface_mark_dirty_rectangle(_Mapped_surface.csfce, static_cast<int>(area.x()), static_cast<int>(area.y()),
static_cast<int>(area.width()), static_cast<int>(area.height()));
ec.clear();
}
