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+/**
+ * Copyright (c) 2018 Cornell University.
+ *
+ * Author: Ted Yin <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <cstdio>
+#include <string>
+#include <functional>
+
+#include "salticidae/msg.h"
+#include "salticidae/event.h"
+#include "salticidae/network.h"
+#include "salticidae/stream.h"
+
+using salticidae::NetAddr;
+using salticidae::DataStream;
+using salticidae::MsgNetwork;
+using salticidae::htole;
+using salticidae::letoh;
+using std::placeholders::_1;
+using std::placeholders::_2;
+
+/** Hello Message. */
+struct MsgHello {
+ static const uint8_t opcode = 0x0;
+ DataStream serialized;
+ std::string name;
+ std::string text;
+ /** Defines how to serialize the msg. */
+ MsgHello(const std::string &name,
+ const std::string &text) {
+ serialized << htole((uint32_t)name.length());
+ serialized << name << text;
+ }
+ /** Defines how to parse the msg. */
+ MsgHello(DataStream &&s) {
+ uint32_t len;
+ s >> len;
+ len = letoh(len);
+ name = std::string((const char *)s.get_data_inplace(len), len);
+ len = s.size();
+ text = std::string((const char *)s.get_data_inplace(len), len);
+ }
+};
+
+/** Acknowledgement Message. */
+struct MsgAck {
+ static const uint8_t opcode = 0x1;
+ DataStream serialized;
+ MsgAck() {}
+ MsgAck(DataStream &&s) {}
+};
+
+const uint8_t MsgHello::opcode;
+const uint8_t MsgAck::opcode;
+
+using PeerNetworkByteOp = salticidae::PeerNetwork<uint8_t>;
+
+struct MyNet: public PeerNetworkByteOp {
+ const std::string name;
+ const NetAddr peer;
+
+ MyNet(const salticidae::EventContext &ec,
+ const std::string name,
+ const NetAddr &peer):
+ PeerNetwork<uint8_t>(ec, 10, 2, 2, 4096, 2, 10),
+ name(name),
+ peer(peer) {
+ /* message handler could be a bound method */
+ reg_handler(salticidae::generic_bind(
+ &MyNet::on_receive_hello, this, _1, _2));
+
+ reg_conn_handler([this](ConnPool::Conn &conn, bool connected) {
+ if (connected)
+ {
+ if (conn.get_mode() == ConnPool::Conn::ACTIVE)
+ {
+ printf("[%s] Connected, sending hello.\n",
+ this->name.c_str());
+ /* send the first message through this connection */
+ MsgNet::send_msg(MsgHello(this->name, "Hello there!"),
+ static_cast<MsgNet::Conn &>(conn));
+ }
+ else
+ printf("[%s] Accepted, waiting for greetings.\n",
+ this->name.c_str());
+ }
+ else
+ {
+ printf("[%s] Disconnected, retrying.\n", this->name.c_str());
+ }
+ });
+ }
+
+ void on_receive_hello(MsgHello &&msg, MyNet::Conn &conn) {
+ printf("[%s] %s says %s\n",
+ name.c_str(),
+ msg.name.c_str(), msg.text.c_str());
+ /* send acknowledgement */
+ MsgNet::send_msg(MsgAck(), conn);
+ }
+};
+
+
+void on_receive_ack(MsgAck &&msg, MyNet::Conn &conn) {
+ auto net = static_cast<MyNet *>(conn.get_net());
+ printf("[%s] the peer knows\n", net->name.c_str());
+}
+
+salticidae::EventContext ec;
+NetAddr alice_addr("127.0.0.1:12345");
+NetAddr bob_addr("127.0.0.1:12346");
+
+int main() {
+ /* test two nodes */
+ MyNet alice(ec, "Alice", bob_addr);
+ MyNet bob(ec, "Bob", alice_addr);
+
+ /* message handler could be a normal function */
+ alice.reg_handler(on_receive_ack);
+ bob.reg_handler(on_receive_ack);
+
+ alice.listen(alice_addr);
+ bob.listen(bob_addr);
+
+ /* first attempt */
+ alice.add_peer(bob_addr);
+ bob.add_peer(alice_addr);
+
+ ec.dispatch();
+ return 0;
+}