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authorDavid Robillard <d@drobilla.net>2012-05-02 06:24:22 +0000
committerDavid Robillard <d@drobilla.net>2012-05-02 06:24:22 +0000
commitfe353cce9665b33a7372ed2d1683b3c2748625f7 (patch)
tree81287558b014309820e9df64033edc0b29d23b4f /src/socket/SocketReceiver.cpp
parent1c736a348c59d98e4022fb02b49a8b4c93baa3d2 (diff)
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Preliminary socket control interface, and ingen_cmd command line interface which uses it.
git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4311 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/socket/SocketReceiver.cpp')
-rw-r--r--src/socket/SocketReceiver.cpp149
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diff --git a/src/socket/SocketReceiver.cpp b/src/socket/SocketReceiver.cpp
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+/*
+ This file is part of Ingen.
+ Copyright 2007-2012 David Robillard <http://drobilla.net/>
+
+ Ingen is free software: you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or any later version.
+
+ Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with Ingen. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <sys/fcntl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include "ingen/Interface.hpp"
+#include "ingen/shared/World.hpp"
+#include "ingen/shared/AtomReader.hpp"
+#include "sord/sordmm.hpp"
+#include "sratom/sratom.h"
+#include "SocketReceiver.hpp"
+
+#define LOG(s) s << "[SocketReceiver] "
+
+namespace Ingen {
+namespace Socket {
+
+SocketReceiver::SocketReceiver(Ingen::Shared::World& world,
+ SharedPtr<Interface> iface)
+ : _world(world)
+ , _iface(iface)
+{
+ // Create server socket
+ _sock = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (_sock == -1) {
+ LOG(Raul::error) << "Failed to create socket" << std::endl;
+ return;
+ }
+
+ _sock_path = world.conf()->option("socket").get_string();
+
+ // Make server socket address
+ struct sockaddr_un addr;
+ memset(&addr, 0, sizeof(struct sockaddr_un));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, _sock_path.c_str(), sizeof(addr.sun_path) - 1);
+
+ // Bind socket to address
+ if (bind(_sock, (struct sockaddr*)&addr,
+ sizeof(struct sockaddr_un)) == -1) {
+ LOG(Raul::error) << "Failed to bind socket" << std::endl;
+ return;
+ }
+
+ // Mark socket as a passive socket for accepting incoming connections
+ if (listen(_sock, 64) == -1) {
+ LOG(Raul::error) << "Failed to listen on socket" << std::endl;
+ }
+
+ LOG(Raul::info) << "Opened socket at " << _sock_path << std::endl;
+ start();
+}
+
+SocketReceiver::~SocketReceiver()
+{
+ stop();
+ join();
+ close(_sock);
+ unlink(_sock_path.c_str());
+}
+
+void
+SocketReceiver::_run()
+{
+ while (!_exit_flag) {
+ // Accept connection from client
+ socklen_t client_addr_size = sizeof(struct sockaddr_un);
+ struct sockaddr_un client_addr;
+ int conn = accept(_sock, (struct sockaddr*)&client_addr,
+ &client_addr_size);
+ if (conn == -1) {
+ LOG(Raul::error) << "Error accepting connection" << std::endl;
+ continue;
+ }
+
+ // Set connection to non-blocking so parser can read until EOF
+ // and not block indefinitely waiting for more input
+ fcntl(conn, F_SETFL, fcntl(conn, F_GETFL, 0) | O_NONBLOCK);
+
+ // Set up a reader to parse the Turtle message into a model
+ Sord::World* world = _world.rdf_world();
+ SerdEnv* env = world->prefixes().c_obj();
+ SordModel* model = sord_new(world->c_obj(), SORD_SPO, false);
+ SerdReader* reader = sord_new_reader(model, env, SERD_TURTLE, NULL);
+
+ // Set base URI to path: so e.g. </foo/bar> will be a path
+ SordNode* base_uri = sord_new_uri(
+ world->c_obj(), (const uint8_t*)"path:");
+ serd_env_set_base_uri(env, sord_node_to_serd_node(base_uri));
+
+ LV2_URID_Map* map = &_world.lv2_uri_map()->urid_map_feature()->urid_map;
+
+ // Set up sratom to build an LV2_Atom from the model
+ Sratom* sratom = sratom_new(map);
+ SerdChunk chunk = { NULL, 0 };
+ LV2_Atom_Forge forge;
+ lv2_atom_forge_init(&forge, map);
+ lv2_atom_forge_set_sink(
+ &forge, sratom_forge_sink, sratom_forge_deref, &chunk);
+
+ // Read directly from the connection with serd
+ FILE* f = fdopen(conn, "r");
+ serd_reader_read_file_handle(reader, f, (const uint8_t*)"(socket)");
+
+ // FIXME: Sratom needs work to be able to read resources
+ SordNode* msg_node = sord_new_blank(
+ world->c_obj(), (const uint8_t*)"genid1");
+
+ // Build an LV2_Atom at chunk.buf from the message
+ sratom_read(sratom, &forge, world->c_obj(), model, msg_node);
+
+ // Make an AtomReader to read that atom and do Ingen things
+ Shared::AtomReader ar(*_world.lv2_uri_map().get(),
+ *_world.uris().get(),
+ _world.forge(),
+ *_iface.get());
+
+ // Call _iface methods based on atom content
+ ar.write((LV2_Atom*)chunk.buf);
+
+ // Respond and close connection
+ write(conn, "OK", 2);
+ fclose(f);
+ close(conn);
+
+ sratom_free(sratom);
+ sord_node_free(world->c_obj(), msg_node);
+ serd_reader_free(reader);
+ sord_free(model);
+ }
+}
+
+} // namespace Ingen
+} // namespace Socket