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Bonjour lookup function in same style as resolve function.

Browse Source 
Includes refactoring of resolve function. 
refactor
This commit is contained in:
David Kocik 2022-04-22 17:52:17 +02:00
parent 457a5d4a65
commit 36f473c984
4 changed files with 494 additions and 298 deletions
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583
src/slic3r/Utils/Bonjour.cpp
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@ -7,14 +7,11 @@
#include <string>
#include <map>
#include <thread>
#include <boost/optional.hpp>
#include <boost/system/error_code.hpp>
#include <boost/endian/conversion.hpp>
#include <boost/asio.hpp>
#include <boost/date_time/posix_time/posix_time_duration.hpp>
#include <boost/format.hpp>
#include <boost/thread.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/log/trivial.hpp>
#include <boost/bind.hpp>
using boost::optional;
using boost::system::error_code;
@ -406,7 +403,7 @@ struct DnsMessage
DnsSDMap sdmap;
static optional<DnsMessage> decode(const std::vector<char> &buffer, const Bonjour::TxtKeys &txt_keys)
static optional<DnsMessage> decode(const std::vector<char>& buffer, const Bonjour::TxtKeys& txt_keys)
{
const auto size = buffer.size();
if (size < DnsHeader::SIZE + DnsQuestion::MIN_SIZE || size > MAX_SIZE) {
@ -430,36 +427,36 @@ struct DnsMessage
auto rr = DnsResource::decode(buffer, offset, dataoffset);
if (!rr) {
return boost::none;
} else {
}
else {
res.parse_rr(buffer, std::move(*rr), dataoffset, txt_keys);
}
}
return std::move(res);
}
private:
void parse_rr(const std::vector<char> &buffer, DnsResource &&rr, size_t dataoffset, const Bonjour::TxtKeys &txt_keys)
void parse_rr(const std::vector<char>& buffer, DnsResource&& rr, size_t dataoffset, const Bonjour::TxtKeys& txt_keys)
{
switch (rr.type) {
case DnsRR_A::TAG:
DnsRR_A::decode(this->rr_a, rr);
this->rr_a->name = rr.name;
break;
case DnsRR_AAAA::TAG:
DnsRR_AAAA::decode(this->rr_aaaa, rr);
this->rr_aaaa->name = rr.name;
break;
case DnsRR_SRV::TAG: {
auto srv = DnsRR_SRV::decode(buffer, rr, dataoffset);
if (srv) { this->sdmap.insert_srv(std::move(rr.name), std::move(*srv)); }
break;
}
case DnsRR_TXT::TAG: {
auto txt = DnsRR_TXT::decode(rr, txt_keys);
if (txt) { this->sdmap.insert_txt(std::move(rr.name), std::move(*txt)); }
break;
}
case DnsRR_A::TAG:
DnsRR_A::decode(this->rr_a, rr);
this->rr_a->name = rr.name;
break;
case DnsRR_AAAA::TAG:
DnsRR_AAAA::decode(this->rr_aaaa, rr);
this->rr_aaaa->name = rr.name;
break;
case DnsRR_SRV::TAG: {
auto srv = DnsRR_SRV::decode(buffer, rr, dataoffset);
if (srv) { this->sdmap.insert_srv(std::move(rr.name), std::move(*srv)); }
break;
}
case DnsRR_TXT::TAG: {
auto txt = DnsRR_TXT::decode(rr, txt_keys);
if (txt) { this->sdmap.insert_txt(std::move(rr.name), std::move(*txt)); }
break;
}
}
}
};
@ -490,22 +487,6 @@ std::ostream& operator<<(std::ostream &os, const DnsMessage &msg)
return os << "])";
}
struct BonjourRequest
{
static const asio::ip::address_v4 MCAST_IP4;
static const asio::ip::address_v6 MCAST_IP6;
static const uint16_t MCAST_PORT;
std::vector<char> data;
static optional<BonjourRequest> make_PTR(const std::string &service, const std::string &protocol);
static optional<BonjourRequest> make_A(const std::string& hostname);
static optional<BonjourRequest> make_AAAA(const std::string& hostname);
private:
BonjourRequest(std::vector<char> &&data) : data(std::move(data)) {}
};
const asio::ip::address_v4 BonjourRequest::MCAST_IP4{ 0xe00000fb };
const asio::ip::address_v6 BonjourRequest::MCAST_IP6 = asio::ip::make_address_v6("ff02::fb");
const uint16_t BonjourRequest::MCAST_PORT = 5353;
@ -618,44 +599,8 @@ optional<BonjourRequest> BonjourRequest::make_AAAA(const std::string& hostname)
return BonjourRequest(std::move(data));
}
// API - private part
struct Bonjour::priv
{
const std::string service;
std::string protocol;
std::string service_dn;
TxtKeys txt_keys;
unsigned timeout;
unsigned retries;
std::string hostname;
std::vector<BonjourReply> replies;
std::vector<char> buffer;
std::thread io_thread;
Bonjour::ReplyFn replyfn;
Bonjour::CompleteFn completefn;
Bonjour::ResolveFn resolvefn;
priv(std::string &&service);
std::string strip_service_dn(const std::string &service_name) const;
void udp_receive_lookup(udp::endpoint from, size_t bytes);
void lookup_perform();
void resolve_perform();
};
Bonjour::priv::priv(std::string &&service)
: service(std::move(service))
, protocol("tcp")
, timeout(10)
, retries(1)
{
buffer.resize(DnsMessage::MAX_SIZE);
}
std::string Bonjour::priv::strip_service_dn(const std::string &service_name) const
namespace {
std::string strip_service_dn(const std::string& service_name, const std::string& service_dn)
{
if (service_name.size() <= service_dn.size()) {
return service_name;
@ -668,155 +613,19 @@ std::string Bonjour::priv::strip_service_dn(const std::string &service_name) con
return service_name;
}
}
} // namespace
void Bonjour::priv::udp_receive_lookup(udp::endpoint from, size_t bytes)
UdpSession::UdpSession(Bonjour::ReplyFn rfn) : replyfn(rfn)
{
if (bytes == 0 || !replyfn) {
return;
}
buffer.resize(bytes);
auto dns_msg = DnsMessage::decode(buffer, txt_keys);
if (dns_msg) {
asio::ip::address ip = from.address();
if (dns_msg->rr_a) { ip = dns_msg->rr_a->ip; }
else if (dns_msg->rr_aaaa) { ip = dns_msg->rr_aaaa->ip; }
for (auto &sdpair : dns_msg->sdmap) {
if (! sdpair.second.srv) {
continue;
}
const auto &srv = *sdpair.second.srv;
auto service_name = strip_service_dn(sdpair.first);
std::string path;
std::string version;
BonjourReply::TxtData txt_data;
if (sdpair.second.txt) {
txt_data = std::move(sdpair.second.txt->data);
}
BonjourReply reply(ip, srv.port, std::move(service_name), srv.hostname, std::move(txt_data));
replyfn(std::move(reply));
}
}
buffer.resize(DnsMessage::MAX_SIZE);
}
void Bonjour::priv::lookup_perform()
{
service_dn = (boost::format("_%1%._%2%.local") % service % protocol).str();
const auto brq = BonjourRequest::make_PTR(service, protocol);
if (!brq) {
return;
}
auto self = this;
try {
boost::asio::io_service io_service;
udp::socket socket(io_service);
socket.open(udp::v4());
socket.set_option(udp::socket::reuse_address(true));
udp::endpoint mcast(BonjourRequest::MCAST_IP4, BonjourRequest::MCAST_PORT);
socket.send_to(asio::buffer(brq->data), mcast);
bool expired = false;
bool retry = false;
asio::deadline_timer timer(io_service);
retries--;
std::function<void(const error_code &)> timer_handler = [&](const error_code &error) {
if (retries == 0 || error) {
expired = true;
if (self->completefn) {
self->completefn();
}
} else {
retry = true;
retries--;
timer.expires_from_now(boost::posix_time::seconds(timeout));
timer.async_wait(timer_handler);
}
};
timer.expires_from_now(boost::posix_time::seconds(timeout));
timer.async_wait(timer_handler);
udp::endpoint recv_from;
const auto recv_handler = [&](const error_code &error, size_t bytes) {
if (!error) { self->udp_receive_lookup(recv_from, bytes); }
};
socket.async_receive_from(asio::buffer(buffer, buffer.size()), recv_from, recv_handler);
while (io_service.run_one()) {
if (expired) {
socket.cancel();
} else if (retry) {
retry = false;
socket.send_to(asio::buffer(brq->data), mcast);
} else {
buffer.resize(DnsMessage::MAX_SIZE);
socket.async_receive_from(asio::buffer(buffer, buffer.size()), recv_from, recv_handler);
}
}
} catch (std::exception& /* e */) {
}
}
class ResolveSocket;
// One session for socket::async_receive_from().
// Keeps buffer of data so it is not overwritten when another async_receive_from starts.
struct UdpSession : boost::enable_shared_from_this<UdpSession>{
UdpSession(ResolveSocket* sckt, Bonjour::ReplyFn rfn) : socket(sckt), replyfn(rfn)
{
buffer.resize(DnsMessage::MAX_SIZE);
}
void handle_receive(const error_code& error, size_t bytes);
udp::endpoint remote_endpoint;
std::vector<char> buffer;
ResolveSocket* socket;
Bonjour::ReplyFn replyfn;
};
// Udp socket for Bonjour::resolve_perform().
// Starts receiving answers after first send() call until io_service is stopped.
class ResolveSocket
{
private:
typedef boost::shared_ptr<UdpSession> SharedSession;
Bonjour::ReplyFn replyfn; // this doesnt call same fn as replyfn of Bonjour class
asio::ip::address multicast_address;
udp::socket socket;
udp::endpoint mcast_endpoint;
boost::shared_ptr< boost::asio::io_service > io_service;
std::string hostname;
boost::optional<BonjourRequest> request_A;
boost::optional<BonjourRequest> request_AAAA;
asio::ip::multicast::outbound_interface outbound_interface;
public:
ResolveSocket(const std::string& hostname, Bonjour::ReplyFn replyfn, const asio::ip::address& multicast_address, const asio::ip::address& interface_address, boost::shared_ptr< boost::asio::io_service > io_service);
void send();
void async_receive();
void cancel() { socket.cancel(); }
std::string get_hostname() { return hostname; }
private:
void receive_handler(SharedSession session, const error_code& error, size_t bytes);
};
ResolveSocket::ResolveSocket(const std::string& hostname, Bonjour::ReplyFn replyfn, const asio::ip::address& multicast_address, const asio::ip::address& interface_address, boost::shared_ptr< boost::asio::io_service > io_service)
: hostname(hostname)
, replyfn(replyfn)
UdpSocket::UdpSocket( Bonjour::ReplyFn replyfn, const asio::ip::address& multicast_address, const asio::ip::address& interface_address, std::shared_ptr< boost::asio::io_service > io_service)
: replyfn(replyfn)
, multicast_address(multicast_address)
, socket(*io_service)
, io_service(io_service)
{
assert(!hostname.empty() && replyfn);
try {
// open socket
boost::asio::ip::udp::endpoint listen_endpoint(multicast_address.is_v4() ? udp::v4() : udp::v6(), BonjourRequest::MCAST_PORT);
@ -844,27 +653,35 @@ ResolveSocket::ResolveSocket(const std::string& hostname, Bonjour::ReplyFn reply
}
}
void ResolveSocket::send()
UdpSocket::UdpSocket( Bonjour::ReplyFn replyfn, const asio::ip::address& multicast_address, std::shared_ptr< boost::asio::io_service > io_service)
: replyfn(replyfn)
, multicast_address(multicast_address)
, socket(*io_service)
, io_service(io_service)
{
try {
if (!request_A) {
// BonjourRequest::make_A / AAAA is now implemented to add .local correctly after the hostname.
// If that is unsufficient, we need to change make_A / AAAA and pass full hostname.
std::string trimmed_hostname = hostname;
if (size_t dot_pos = trimmed_hostname.find_first_of('.'); dot_pos != std::string::npos)
trimmed_hostname = trimmed_hostname.substr(0, dot_pos);
request_A = BonjourRequest::make_A(trimmed_hostname);
}
if (!request_AAAA) {
std::string trimmed_hostname = hostname;
if (size_t dot_pos = trimmed_hostname.find_first_of('.'); dot_pos != std::string::npos)
trimmed_hostname = trimmed_hostname.substr(0, dot_pos);
request_AAAA = BonjourRequest::make_AAAA(trimmed_hostname);
}
// multicast both queries
socket.send_to(asio::buffer(request_A->data), mcast_endpoint);
socket.send_to(asio::buffer(request_AAAA->data), mcast_endpoint);
// open socket
boost::asio::ip::udp::endpoint listen_endpoint(multicast_address.is_v4() ? udp::v4() : udp::v6(), BonjourRequest::MCAST_PORT);
socket.open(listen_endpoint.protocol());
// set socket to listen
socket.set_option(udp::socket::reuse_address(true));
socket.bind(listen_endpoint);
socket.set_option(boost::asio::ip::multicast::join_group(multicast_address));
mcast_endpoint = udp::endpoint(multicast_address, BonjourRequest::MCAST_PORT);
BOOST_LOG_TRIVIAL(info) << "Socket created. Multicast: " << multicast_address;
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << e.what();
}
}
void UdpSocket::send()
{
try {
for (const auto& request : requests)
socket.send_to(asio::buffer(request.m_data), mcast_endpoint);
// Should we care if this is called while already receiving? (async_receive call from receive_handler)
async_receive();
@ -874,30 +691,86 @@ void ResolveSocket::send()
}
}
void ResolveSocket::async_receive()
void UdpSocket::async_receive()
{
try {
// our session to hold the buffer + endpoint
auto session = boost::make_shared<UdpSession>(this, replyfn);
auto session = create_session();
socket.async_receive_from(asio::buffer(session->buffer, session->buffer.size())
, session->remote_endpoint
, boost::bind(&ResolveSocket::receive_handler, this, session, asio::placeholders::error, asio::placeholders::bytes_transferred));
, boost::bind(&UdpSocket::receive_handler, this, session, asio::placeholders::error, asio::placeholders::bytes_transferred));
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << e.what();
}
}
void ResolveSocket::receive_handler(SharedSession session, const error_code& error, size_t bytes)
void UdpSocket::receive_handler(SharedSession session, const boost::system::error_code& error, size_t bytes)
{
// let io_service to handle the datagram on session
io_service->post(bind(&UdpSession::handle_receive, session, error, bytes));
// from boost documentation io_service::post:
// The io_service guarantees that the handler will only be called in a thread in which the run(), run_one(), poll() or poll_one() member functions is currently being invoked.
io_service->post(boost::bind(&UdpSession::handle_receive, session, error, bytes));
// immediately accept new datagrams
async_receive();
}
void UdpSession::handle_receive(const error_code& error, size_t bytes)
SharedSession LookupSocket::create_session() const
{
return std::shared_ptr< LookupSession >(new LookupSession(this, replyfn));
}
void LookupSession::handle_receive(const error_code& error, size_t bytes)
{
assert(socket);
if (error) {
BOOST_LOG_TRIVIAL(error) << error.message();
return;
}
if (bytes == 0 || !replyfn) {
return;
}
buffer.resize(bytes);
auto dns_msg = DnsMessage::decode(buffer, socket->get_txt_keys());
if (dns_msg) {
asio::ip::address ip = remote_endpoint.address();
if (dns_msg->rr_a) { ip = dns_msg->rr_a->ip; }
else if (dns_msg->rr_aaaa) { ip = dns_msg->rr_aaaa->ip; }
for (auto& sdpair : dns_msg->sdmap) {
if (!sdpair.second.srv) {
continue;
}
const auto& srv = *sdpair.second.srv;
auto service_name = strip_service_dn(sdpair.first, socket->get_service_dn());
std::string path;
std::string version;
BonjourReply::TxtData txt_data;
if (sdpair.second.txt) {
txt_data = std::move(sdpair.second.txt->data);
}
BonjourReply reply(ip, srv.port, std::move(service_name), srv.hostname, std::move(txt_data));
replyfn(std::move(reply));
}
}
}
SharedSession ResolveSocket::create_session() const
{
return std::shared_ptr< ResolveSession > (new ResolveSession(this, replyfn));
}
void ResolveSession::handle_receive(const error_code& error, size_t bytes)
{
assert(socket);
if (error) {
// todo: what level? do we even log? There might be callbacks when timer runs out
BOOST_LOG_TRIVIAL(info) << error.message();
@ -910,7 +783,6 @@ void UdpSession::handle_receive(const error_code& error, size_t bytes)
buffer.resize(bytes);
#if 0
// this is log of buffer, be careful with logging here - called from async_receive
std::string str;
char const hex_chars[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
for (size_t i = 0; i < buffer.size(); i++) {
@ -952,81 +824,210 @@ void UdpSession::handle_receive(const error_code& error, size_t bytes)
}
}
void Bonjour::priv::resolve_perform()
// API - private part
struct Bonjour::priv
{
// reply callback is shared to every UDPSession which is called asyn
boost::mutex replies_guard;
std::vector<BonjourReply> replies;
// examples would probably store [self] to the lambda (and the timer one), is it ok not to do it? (Should be c++03)
const auto reply_callback = [&rpls = replies, &guard = replies_guard](BonjourReply&& reply)
{
guard.lock();
if (std::find(rpls.begin(), rpls.end(), reply) == rpls.end())
rpls.push_back(reply);
guard.unlock();
};
const std::string service;
std::string protocol;
std::string service_dn;
TxtKeys txt_keys;
unsigned timeout;
unsigned retries;
std::string hostname;
boost::shared_ptr< boost::asio::io_service > io_service(
new boost::asio::io_service
);
// std::vector<BonjourReply> replies;
std::vector<ResolveSocket*> sockets;
std::vector<char> buffer;
std::thread io_thread;
Bonjour::ReplyFn replyfn;
Bonjour::CompleteFn completefn;
Bonjour::ResolveFn resolvefn;
priv(std::string&& service);
// void udp_receive_lookup(udp::endpoint from, size_t bytes);
void lookup_perform();
void resolve_perform();
};
Bonjour::priv::priv(std::string&& service)
: service(std::move(service))
, protocol("tcp")
, timeout(10)
, retries(1)
{
buffer.resize(DnsMessage::MAX_SIZE);
}
void Bonjour::priv::lookup_perform()
{
service_dn = (boost::format("_%1%._%2%.local") % service % protocol).str();
std::shared_ptr< boost::asio::io_service > io_service(new boost::asio::io_service);
std::vector<LookupSocket*> sockets;
// resolve intefaces - from PR#6646
std::vector<boost::asio::ip::address> interfaces;
asio::ip::udp::resolver resolver(*io_service);
boost::system::error_code ec;
// ipv4 interfaces
auto results = resolver.resolve(udp::v4(), asio::ip::host_name(), "");
for (auto const& r : results) {
auto const addr = r.endpoint().address();
if (addr.is_loopback()) continue;
interfaces.emplace_back(addr);
auto results = resolver.resolve(udp::v4(), asio::ip::host_name(), "", ec);
if (!ec) {
for (const auto & r : results) {
const auto addr = r.endpoint().address();
if (addr.is_loopback()) continue;
interfaces.emplace_back(std::move(addr));
}
// create ipv4 socket for each interface
// each will send to querry to for both ipv4 and ipv6
for (const auto& intrfc : interfaces)
sockets.emplace_back(new LookupSocket(txt_keys, service, service_dn, protocol, replyfn, BonjourRequest::MCAST_IP4, intrfc, io_service));
} else {
BOOST_LOG_TRIVIAL(info) << "Failed to resolve ipv4 interfaces: " << ec.message();
}
// create ipv4 socket for each interface
// each will send to querry to for both ipv4 and ipv6
for (const auto intrfc : interfaces)
sockets.emplace_back(new ResolveSocket(hostname, reply_callback, BonjourRequest::MCAST_IP4, intrfc, io_service));
if (sockets.empty())
sockets.emplace_back(new LookupSocket(txt_keys, service, service_dn, protocol, replyfn, BonjourRequest::MCAST_IP4, io_service));
// ipv6 interfaces
interfaces.clear();
results = resolver.resolve(udp::v6(), asio::ip::host_name(), "");
for (auto const& r : results) {
auto const addr = r.endpoint().address();
if (addr.is_loopback()) continue;
interfaces.emplace_back(addr);
//udp::resolver::query query(host, PORT, boost::asio::ip::resolver_query_base::numeric_service);
results = resolver.resolve(udp::v6(), asio::ip::host_name(), "", ec);
if (!ec)
{
for (const auto& r : results) {
const auto addr = r.endpoint().address();
if (addr.is_loopback()) continue;
interfaces.emplace_back(std::move(addr));
}
// create ipv6 socket for each interface
// each will send to querry to for both ipv4 and ipv6
for (const auto& intrfc : interfaces)
sockets.emplace_back(new LookupSocket(txt_keys, service, service_dn, protocol, replyfn, BonjourRequest::MCAST_IP6, intrfc, io_service));
if (interfaces.empty())
sockets.emplace_back(new LookupSocket(txt_keys, service, service_dn, protocol, replyfn, BonjourRequest::MCAST_IP6, io_service));
} else {
BOOST_LOG_TRIVIAL(info)<< "Failed to resolve ipv6 interfaces: " << ec.message();
}
// create ipv6 socket for each interface
// each will send to querry to for both ipv4 and ipv6
for (const auto intrfc : interfaces)
sockets.emplace_back(new ResolveSocket(hostname, reply_callback, BonjourRequest::MCAST_IP6, intrfc, io_service));
try {
// send first queries
for each (auto * socket in sockets)
for (auto * socket : sockets)
socket->send();
// timer settings
asio::deadline_timer timer(*io_service);
retries--;
std::function<void(const error_code&)> timer_handler = [&](const error_code& error) {
replies_guard.lock();
int replies_count = replies.size();
replies_guard.unlock();
// end
if (retries == 0 || error || replies_count > 0) {
if (retries == 0 || error) {
// is this correct ending?
io_service->stop();
replies_guard.lock();
if (replies_count > 0 && resolvefn) {
resolvefn(replies);
if (completefn) {
completefn();
}
replies_guard.unlock();
// restart timer
} else {
retries--;
timer.expires_from_now(boost::posix_time::seconds(timeout));
timer.async_wait(timer_handler);
// trigger another round of queries
for each (auto * socket in sockets)
for (auto * socket : sockets)
socket->send();
}
};
// start timer
timer.expires_from_now(boost::posix_time::seconds(timeout));
timer.async_wait(timer_handler);
// start io_service, it will run until it has something to do - so in this case until stop is called in timer
io_service->run();
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << e.what();
}
}
void Bonjour::priv::resolve_perform()
{
// reply callback is shared to every UDPSession which is called on same thread as io_service->run();
// thus no need to mutex replies in reply_callback, same should go with the timer
std::vector<BonjourReply> replies;
// examples would store [self] to the lambda (and the timer one), is it ok not to do it? (Should be c++03)
const auto reply_callback = [&rpls = replies](BonjourReply&& reply)
{
if (std::find(rpls.begin(), rpls.end(), reply) == rpls.end())
rpls.push_back(reply);
};
std::shared_ptr< boost::asio::io_service > io_service(new boost::asio::io_service);
std::vector<ResolveSocket*> sockets;
// resolve intefaces - from PR#6646
std::vector<boost::asio::ip::address> interfaces;
asio::ip::udp::resolver resolver(*io_service);
boost::system::error_code ec;
// ipv4 interfaces
auto results = resolver.resolve(udp::v4(), asio::ip::host_name(), "", ec);
if (!ec) {
for (auto const& r : results) {
auto const addr = r.endpoint().address();
if (addr.is_loopback()) continue;
interfaces.emplace_back(addr);
}
// create ipv4 socket for each interface
// each will send to querry to for both ipv4 and ipv6
for (const auto& intrfc : interfaces)
sockets.emplace_back(new ResolveSocket(hostname, reply_callback, BonjourRequest::MCAST_IP4, intrfc, io_service));
} else {
BOOST_LOG_TRIVIAL(info) << "Failed to resolve ipv4 interfaces: " << ec.message();
}
if (sockets.empty())
sockets.emplace_back(new ResolveSocket(hostname, reply_callback, BonjourRequest::MCAST_IP4, io_service));
// ipv6 interfaces
interfaces.clear();
results = resolver.resolve(udp::v6(), asio::ip::host_name(), "", ec);
if (!ec) {
for (auto const& r : results) {
auto const addr = r.endpoint().address();
if (addr.is_loopback()) continue;
interfaces.emplace_back(addr);
}
// create ipv6 socket for each interface
// each will send to querry to for both ipv4 and ipv6
for (const auto& intrfc : interfaces)
sockets.emplace_back(new ResolveSocket(hostname, reply_callback, BonjourRequest::MCAST_IP6, intrfc, io_service));
if (interfaces.empty())
sockets.emplace_back(new ResolveSocket(hostname, reply_callback, BonjourRequest::MCAST_IP6, io_service));
} else {
BOOST_LOG_TRIVIAL(info) << "Failed to resolve ipv6 interfaces: " << ec.message();
}
try {
// send first queries
for (auto * socket : sockets)
socket->send();
// timer settings
asio::deadline_timer timer(*io_service);
retries--;
std::function<void(const error_code&)> timer_handler = [&](const error_code& error) {
int replies_count = replies.size();
// end
if (retries == 0 || error || replies_count > 0) {
// is this correct ending?
io_service->stop();
if (replies_count > 0 && resolvefn) {
resolvefn(replies);
}
// restart timer
} else {
retries--;
timer.expires_from_now(boost::posix_time::seconds(timeout));
timer.async_wait(timer_handler);
// trigger another round of queries
for (auto * socket : sockets)
socket->send();
}
};

199
src/slic3r/Utils/Bonjour.hpp
View File

@ -7,12 +7,17 @@
#include <set>
#include <unordered_map>
#include <functional>
#include <boost/asio/ip/address.hpp>
#include <boost/asio.hpp>
#include <boost/asio/ip/address.hpp>
#include <boost/optional.hpp>
#include <boost/system/error_code.hpp>
#include <boost/shared_ptr.hpp>
namespace Slic3r {
struct BonjourReply
{
typedef std::unordered_map<std::string, std::string> TxtData;
@ -40,7 +45,6 @@ struct BonjourReply
std::ostream& operator<<(std::ostream &, const BonjourReply &);
/// Bonjour lookup performer
class Bonjour : public std::enable_shared_from_this<Bonjour> {
private:
@ -86,6 +90,197 @@ private:
std::unique_ptr<priv> p;
};
struct BonjourRequest
{
static const boost::asio::ip::address_v4 MCAST_IP4;
static const boost::asio::ip::address_v6 MCAST_IP6;
static const uint16_t MCAST_PORT;
std::vector<char> m_data;
static boost::optional<BonjourRequest> make_PTR(const std::string& service, const std::string& protocol);
static boost::optional<BonjourRequest> make_A(const std::string& hostname);
static boost::optional<BonjourRequest> make_AAAA(const std::string& hostname);
private:
BonjourRequest(std::vector<char>&& data) : m_data(std::move(data)) {}
};
class LookupSocket;
class ResolveSocket;
// Session is created for each async_receive of socket. On receive, its handle_receive method is called (Thru io_service->post).
// ReplyFn is called if correct datagram was received.
class UdpSession
{
public:
UdpSession(Bonjour::ReplyFn rfn);
virtual void handle_receive(const boost::system::error_code& error, size_t bytes) = 0;
std::vector<char> buffer;
boost::asio::ip::udp::endpoint remote_endpoint;
protected:
Bonjour::ReplyFn replyfn;
};
typedef std::shared_ptr<UdpSession> SharedSession;
// Session for LookupSocket
class LookupSession : public UdpSession
{
public:
LookupSession(const LookupSocket* sckt, Bonjour::ReplyFn rfn) : UdpSession(rfn), socket(sckt) {}
void handle_receive(const boost::system::error_code& error, size_t bytes) override;
protected:
// const pointer to socket to get needed data as txt_keys etc.
const LookupSocket* socket;
};
// Session for ResolveSocket
class ResolveSession : public UdpSession
{
public:
ResolveSession(const ResolveSocket* sckt, Bonjour::ReplyFn rfn) : UdpSession(rfn), socket(sckt) {}
void handle_receive(const boost::system::error_code& error, size_t bytes) override;
protected:
// const pointer to seocket to get hostname during handle_receive
const ResolveSocket* socket;
};
// Udp socket, starts receiving answers after first send() call until io_service is stopped.
class UdpSocket
{
public:
// Two constructors: 1st is with interface which must be resolved before calling this
UdpSocket(Bonjour::ReplyFn replyfn
, const boost::asio::ip::address& multicast_address
, const boost::asio::ip::address& interface_address
, std::shared_ptr< boost::asio::io_service > io_service);
UdpSocket(Bonjour::ReplyFn replyfn
, const boost::asio::ip::address& multicast_address
, std::shared_ptr< boost::asio::io_service > io_service);
void send();
void async_receive();
void cancel() { socket.cancel(); }
protected:
void receive_handler(SharedSession session, const boost::system::error_code& error, size_t bytes);
virtual SharedSession create_session() const = 0;
Bonjour::ReplyFn replyfn;
boost::asio::ip::address multicast_address;
boost::asio::ip::udp::socket socket;
boost::asio::ip::udp::endpoint mcast_endpoint;
std::shared_ptr< boost::asio::io_service > io_service;
std::vector<BonjourRequest> requests;
};
class LookupSocket : public UdpSocket
{
public:
LookupSocket(Bonjour::TxtKeys txt_keys
, std::string service
, std::string service_dn
, std::string protocol
, Bonjour::ReplyFn replyfn
, const boost::asio::ip::address& multicast_address
, const boost::asio::ip::address& interface_address
, std::shared_ptr< boost::asio::io_service > io_service)
: UdpSocket(replyfn, multicast_address, interface_address, io_service)
, txt_keys(txt_keys)
, service(service)
, service_dn(service_dn)
, protocol(protocol)
{
assert(!service.empty() && replyfn);
create_request();
}
LookupSocket(Bonjour::TxtKeys txt_keys
, std::string service
, std::string service_dn
, std::string protocol
, Bonjour::ReplyFn replyfn
, const boost::asio::ip::address& multicast_address
, std::shared_ptr< boost::asio::io_service > io_service)
: UdpSocket(replyfn, multicast_address, io_service)
, txt_keys(txt_keys)
, service(service)
, service_dn(service_dn)
, protocol(protocol)
{
assert(!service.empty() && replyfn);
create_request();
}
const Bonjour::TxtKeys get_txt_keys() const { return txt_keys; }
const std::string get_service() const { return service; }
const std::string get_service_dn() const { return service_dn; }
protected:
SharedSession create_session() const override;
void create_request()
{
requests.clear();
// create PTR request
if (auto rqst = BonjourRequest::make_PTR(service, protocol); rqst)
requests.push_back(std::move(rqst.get()));
}
boost::optional<BonjourRequest> request;
Bonjour::TxtKeys txt_keys;
std::string service;
std::string service_dn;
std::string protocol;
};
class ResolveSocket : public UdpSocket
{
public:
ResolveSocket(const std::string& hostname
, Bonjour::ReplyFn replyfn
, const boost::asio::ip::address& multicast_address
, const boost::asio::ip::address& interface_address
, std::shared_ptr< boost::asio::io_service > io_service)
: UdpSocket(replyfn, multicast_address, interface_address, io_service)
, hostname(hostname)
{
assert(!hostname.empty() && replyfn);
create_requests();
}
ResolveSocket(const std::string& hostname
, Bonjour::ReplyFn replyfn
, const boost::asio::ip::address& multicast_address
, std::shared_ptr< boost::asio::io_service > io_service)
: UdpSocket(replyfn, multicast_address, io_service)
, hostname(hostname)
{
assert(!hostname.empty() && replyfn);
create_requests();
}
std::string get_hostname() const { return hostname; }
protected:
SharedSession create_session() const override;
void create_requests()
{
requests.clear();
// BonjourRequest::make_A / AAAA is now implemented to add .local correctly after the hostname.
// If that is unsufficient, we need to change make_A / AAAA and pass full hostname.
std::string trimmed_hostname = hostname;
if (size_t dot_pos = trimmed_hostname.find_first_of('.'); dot_pos != std::string::npos)
trimmed_hostname = trimmed_hostname.substr(0, dot_pos);
if (auto rqst = BonjourRequest::make_A(trimmed_hostname); rqst)
requests.push_back(std::move(rqst.get()));
trimmed_hostname = hostname;
if (size_t dot_pos = trimmed_hostname.find_first_of('.'); dot_pos != std::string::npos)
trimmed_hostname = trimmed_hostname.substr(0, dot_pos);
if (auto rqst = BonjourRequest::make_AAAA(trimmed_hostname); rqst)
requests.push_back(std::move(rqst.get()));
}
std::string hostname;
};
}

4
src/slic3r/Utils/OctoPrint.cpp
View File

@ -243,7 +243,7 @@ bool OctoPrint::upload(PrintHostUpload upload_data, ProgressFn prorgess_fn, Erro
.set_timeout(1) // after each timeout, if there is any answer, the resolving will stop
.on_resolve([&ra = resolved_addr](const std::vector<BonjourReply>& replies) {
std::vector<boost::asio::ip::address> resolved_addr;
for each (const auto & rpl in replies) {
for (const auto & rpl : replies) {
boost::asio::ip::address ip(rpl.ip);
ra.emplace_back(ip);
BOOST_LOG_TRIVIAL(info) << "Resolved IP address: " << rpl.ip;
@ -262,7 +262,7 @@ bool OctoPrint::upload(PrintHostUpload upload_data, ProgressFn prorgess_fn, Erro
bool OctoPrint::upload_inner_with_resolved_ip(PrintHostUpload upload_data, ProgressFn prorgess_fn, ErrorFn error_fn, const std::vector<boost::asio::ip::address>& resolved_addr) const
{
wxString error_message;
for each (const auto& ip in resolved_addr) {
for (const auto& ip : resolved_addr) {
// If test fails, test_msg_or_host_ip contains the error message.
// Otherwise on Windows it contains the resolved IP address of the host.
// Test_msg already contains resolved ip and will be cleared on start of test().

2
src/slic3r/Utils/OctoPrint.hpp
View File

@ -4,11 +4,11 @@
#include <string>
#include <wx/string.h>
#include <boost/optional.hpp>
#include <boost/asio/ip/address.hpp>
#include "PrintHost.hpp"
#include "libslic3r/PrintConfig.hpp"
class boost::asio::ip::address;
namespace Slic3r {