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Fixed the multicast examples. #390

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Fixed the multicast examples. #390

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26 changes: 19 additions & 7 deletions example/cpp03/multicast/receiver.cpp
100644 → 100755
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,15 +24,20 @@ class receiver
: socket_(io_context)
{
// Create the socket so that multiple may be bound to the same address.
boost::asio::ip::udp::endpoint listen_endpoint(
listen_address, multicast_port);
boost::asio::ip::udp::endpoint listen_endpoint(((listen_address.is_v6())
? boost::asio::ip::udp::v6() : boost::asio::ip::udp::v4()),
multicast_port);
socket_.open(listen_endpoint.protocol());
socket_.set_option(boost::asio::ip::udp::socket::reuse_address(true));
socket_.bind(listen_endpoint);

// Join the multicast group.
socket_.set_option(
boost::asio::ip::multicast::join_group(multicast_address));
if (listen_address.is_v6())
socket_.set_option(boost::asio::ip::multicast::join_group(
multicast_address.to_v6(), listen_address.to_v6().scope_id()));
else
socket_.set_option(boost::asio::ip::multicast::join_group(
multicast_address.to_v4(), listen_address.to_v4()));

socket_.async_receive_from(
boost::asio::buffer(data_, max_length), sender_endpoint_,
Expand Down Expand Up @@ -79,9 +84,16 @@ int main(int argc, char* argv[])
}

boost::asio::io_context io_context;
receiver r(io_context,
boost::asio::ip::make_address(argv[1]),
boost::asio::ip::make_address(argv[2]));
boost::asio::ip::address listen_address(boost::asio::ip::make_address(argv[1]));
boost::asio::ip::address multicast_address(boost::asio::ip::make_address(argv[2]));
if ((listen_address.is_v4() && !multicast_address.is_v4())
|| (!listen_address.is_v4() && multicast_address.is_v4()))
{
std::cerr << "Error: both addresses have to be IPv4 or IPv6." << std::endl;
return 1;
}

receiver r(io_context, listen_address, multicast_address);
io_context.run();
}
catch (std::exception& e)
Expand Down
23 changes: 19 additions & 4 deletions example/cpp03/multicast/sender.cpp
100644 → 100755
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,12 +21,18 @@ class sender
{
public:
sender(boost::asio::io_context& io_context,
const boost::asio::ip::address& listen_address,
const boost::asio::ip::address& multicast_address)
: endpoint_(multicast_address, multicast_port),
socket_(io_context, endpoint_.protocol()),
timer_(io_context),
message_count_(0)
{
if (listen_address.is_v6())
socket_.set_option(boost::asio::ip::multicast::outbound_interface(listen_address.to_v6().scope_id()));
else
socket_.set_option(boost::asio::ip::multicast::outbound_interface(listen_address.to_v4()));

std::ostringstream os;
os << "Message " << message_count_++;
message_ = os.str();
Expand Down Expand Up @@ -75,18 +81,27 @@ int main(int argc, char* argv[])
{
try
{
if (argc != 2)
if (argc != 3)
{
std::cerr << "Usage: sender <multicast_address>\n";
std::cerr << " For IPv4, try:\n";
std::cerr << " sender 239.255.0.1\n";
std::cerr << " sender 0.0.0.0 239.255.0.1\n";
std::cerr << " For IPv6, try:\n";
std::cerr << " sender ff31::8000:1234\n";
std::cerr << " sender 0::0 ff31::8000:1234\n";
return 1;
}

boost::asio::io_context io_context;
sender s(io_context, boost::asio::ip::make_address(argv[1]));
boost::asio::ip::address listen_address(boost::asio::ip::make_address(argv[1]));
boost::asio::ip::address multicast_address(boost::asio::ip::make_address(argv[2]));
if ((listen_address.is_v4() && !multicast_address.is_v4())
|| (!listen_address.is_v4() && multicast_address.is_v4()))
{
std::cerr << "Error: both addresses have to be IPv4 or IPv6." << std::endl;
return 1;
}

sender s(io_context, listen_address, multicast_address);
io_context.run();
}
catch (std::exception& e)
Expand Down
26 changes: 19 additions & 7 deletions example/cpp11/multicast/receiver.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,15 +24,20 @@ class receiver
: socket_(io_context)
{
// Create the socket so that multiple may be bound to the same address.
boost::asio::ip::udp::endpoint listen_endpoint(
listen_address, multicast_port);
boost::asio::ip::udp::endpoint listen_endpoint(((listen_address.is_v6())
? boost::asio::ip::udp::v6() : boost::asio::ip::udp::v4()),
multicast_port);
socket_.open(listen_endpoint.protocol());
socket_.set_option(boost::asio::ip::udp::socket::reuse_address(true));
socket_.bind(listen_endpoint);

// Join the multicast group.
socket_.set_option(
boost::asio::ip::multicast::join_group(multicast_address));
if (listen_address.is_v6())
socket_.set_option(boost::asio::ip::multicast::join_group(
multicast_address.to_v6(), listen_address.to_v6().scope_id()));
else
socket_.set_option(boost::asio::ip::multicast::join_group(
multicast_address.to_v4(), listen_address.to_v4()));

do_receive();
}
Expand Down Expand Up @@ -74,9 +79,16 @@ int main(int argc, char* argv[])
}

boost::asio::io_context io_context;
receiver r(io_context,
boost::asio::ip::make_address(argv[1]),
boost::asio::ip::make_address(argv[2]));
boost::asio::ip::address listen_address(boost::asio::ip::make_address(argv[1]));
boost::asio::ip::address multicast_address(boost::asio::ip::make_address(argv[2]));
if ((listen_address.is_v4() && !multicast_address.is_v4())
|| (!listen_address.is_v4() && multicast_address.is_v4()))
{
std::cerr << "Error: both addresses have to be IPv4 or IPv6." << std::endl;
return 1;
}

receiver r(io_context, listen_address, multicast_address);
io_context.run();
}
catch (std::exception& e)
Expand Down
23 changes: 19 additions & 4 deletions example/cpp11/multicast/sender.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -20,12 +20,18 @@ class sender
{
public:
sender(boost::asio::io_context& io_context,
const boost::asio::ip::address& listen_address,
const boost::asio::ip::address& multicast_address)
: endpoint_(multicast_address, multicast_port),
socket_(io_context, endpoint_.protocol()),
timer_(io_context),
message_count_(0)
{
if (listen_address.is_v6())
socket_.set_option(boost::asio::ip::multicast::outbound_interface(listen_address.to_v6().scope_id()));
else
socket_.set_option(boost::asio::ip::multicast::outbound_interface(listen_address.to_v4()));

do_send();
}

Expand Down Expand Up @@ -68,18 +74,27 @@ int main(int argc, char* argv[])
{
try
{
if (argc != 2)
if (argc != 3)
{
std::cerr << "Usage: sender <multicast_address>\n";
std::cerr << " For IPv4, try:\n";
std::cerr << " sender 239.255.0.1\n";
std::cerr << " sender 0.0.0.0 239.255.0.1\n";
std::cerr << " For IPv6, try:\n";
std::cerr << " sender ff31::8000:1234\n";
std::cerr << " sender 0::0 ff31::8000:1234\n";
return 1;
}

boost::asio::io_context io_context;
sender s(io_context, boost::asio::ip::make_address(argv[1]));
boost::asio::ip::address listen_address(boost::asio::ip::make_address(argv[1]));
boost::asio::ip::address multicast_address(boost::asio::ip::make_address(argv[2]));
if ((listen_address.is_v4() && !multicast_address.is_v4())
|| (!listen_address.is_v4() && multicast_address.is_v4()))
{
std::cerr << "Error: both addresses have to be IPv4 or IPv6." << std::endl;
return 1;
}

sender s(io_context, listen_address, multicast_address);
io_context.run();
}
catch (std::exception& e)
Expand Down