/** * Copyright (c) 2019 Ava Labs, Inc. * * Author: Ted Yin * * 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 #include #include #include #include #include #include "salticidae/msg.h" #include "salticidae/event.h" #include "salticidae/network.h" #include "salticidae/stream.h" using salticidae::NetAddr; using salticidae::DataStream; using salticidae::htole; using salticidae::letoh; using salticidae::EventContext; using salticidae::ThreadCall; using std::placeholders::_1; using std::placeholders::_2; using PeerNetwork = salticidae::PeerNetwork; struct MsgText { static const uint8_t opcode = 0x0; DataStream serialized; uint64_t id; std::string text; MsgText(uint64_t id, const std::string &text) { serialized << salticidae::htole(id) << salticidae::htole((uint32_t)text.length()) << text; } MsgText(DataStream &&s) { uint32_t len; s >> id; id = salticidae::letoh(id); s >> len; len = salticidae::letoh(len); text = std::string((const char *)s.get_data_inplace(len), len); } }; const uint8_t MsgText::opcode; struct Net { uint64_t id; EventContext ec; ThreadCall tc; std::thread th; PeerNetwork *net; const std::string listen_addr; Net(uint64_t id, uint16_t port): id(id), tc(ec), listen_addr("127.0.0.1:"+ std::to_string(port)) { net = new PeerNetwork(ec, PeerNetwork::Config().conn_timeout(5).ping_period(2)); net->reg_handler([this](const MsgText &msg, const PeerNetwork::conn_t &) { fprintf(stdout, "net %lu: peer %lu says %s\n", this->id, msg.id, msg.text.c_str()); }); net->reg_error_handler([this](const std::exception_ptr _err, bool fatal) { try { std::rethrow_exception(_err); } catch (const std::exception &err) { fprintf(stdout, "net %lu: captured %s error during an async call: %s\n", this->id, fatal ? "fatal" : "recoverable", err.what()); } }); net->reg_peer_handler([this](const PeerNetwork::conn_t &conn, bool connected) { fprintf(stdout, "net %lu: %s peer %s\n", this->id, connected ? "connected to" : "disconnected from", std::string(conn->get_peer_addr()).c_str()); }); net->reg_unknown_peer_handler([this](const NetAddr &claimed_addr) { fprintf(stdout, "net %lu: unknown peer %s attempts to connnect\n", this->id, std::string(claimed_addr).c_str()); }); th = std::thread([=](){ try { net->start(); net->listen(NetAddr(listen_addr)); fprintf(stdout, "net %lu: listen to %s\n", id, listen_addr.c_str()); ec.dispatch(); } catch (std::exception &err) { fprintf(stdout, "net %lu: got error during a sync call: %s\n", id, err.what()); } fprintf(stdout, "net %lu: main loop ended\n", id); }); } void add_peer(const std::string &listen_addr) { try { net->add_peer(NetAddr(listen_addr)); } catch (std::exception &err) { fprintf(stdout, "net %lu: got error during a sync call: %s\n", id, err.what()); } } void del_peer(const std::string &listen_addr) { try { net->del_peer(NetAddr(listen_addr)); } catch (std::exception &err) { fprintf(stdout, "net %lu: got error during a sync call: %s\n", id, err.what()); } } void stop_join() { tc.async_call([ec=this->ec](ThreadCall::Handle &) { ec.stop(); }); th.join(); } ~Net() { delete net; } }; std::unordered_map nets; std::unordered_map > cmd_map; int read_int(char *buff) { scanf("%64s", buff); try { int t = std::stoi(buff); if (t < 0) throw std::invalid_argument("negative"); return t; } catch (std::invalid_argument) { fprintf(stdout, "expect a non-negative integer\n"); return -1; } } int main(int argc, char **argv) { int i; fprintf(stdout, "p2p network library playground (type help for more info)\n"); fprintf(stdout, "========================================================\n"); auto cmd_exit = [](char *) { for (auto &p: nets) { p.second->stop_join(); delete p.second; } exit(0); }; auto cmd_add = [](char *buff) { int id = read_int(buff); if (id < 0) return; if (nets.count(id)) { fprintf(stdout, "net id already exists\n"); return; } int port = read_int(buff); if (port < 0) return; if (port >= 65536) { fprintf(stdout, "port should be < 65536\n"); return; } nets.insert(std::make_pair(id, new Net(id, port))); }; auto cmd_ls = [](char *) { for (auto &p: nets) fprintf(stdout, "%d -> %s\n", p.first, p.second->listen_addr.c_str()); }; auto cmd_del = [](char *buff) { int id = read_int(buff); if (id < 0) return; auto it = nets.find(id); if (it == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } it->second->stop_join(); delete it->second; nets.erase(it); }; auto cmd_addpeer = [](char *buff) { int id = read_int(buff); if (id < 0) return; auto it = nets.find(id); if (it == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } int id2 = read_int(buff); if (id2 < 0) return; auto it2 = nets.find(id2); if (it2 == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } it->second->add_peer(it2->second->listen_addr); }; auto cmd_delpeer = [](char *buff) { int id = read_int(buff); if (id < 0) return; auto it = nets.find(id); if (it == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } int id2 = read_int(buff); if (id2 < 0) return; auto it2 = nets.find(id2); if (it2 == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } it->second->del_peer(it2->second->listen_addr); }; auto cmd_msg = [](char *buff) { int id = read_int(buff); if (id < 0) return; auto it = nets.find(id); if (it == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } int id2 = read_int(buff); if (id2 < 0) return; auto it2 = nets.find(id2); if (it2 == nets.end()) { fprintf(stdout, "net id does not exist\n"); return; } scanf("%64s", buff); it->second->net->send_msg(MsgText(id, buff), it2->second->listen_addr); }; auto cmd_sleep = [](char *buff) { int sec = read_int(buff); if (sec < 0) return; sleep(sec); }; auto cmd_help = [](char *) { fprintf(stdout, "add -- start a node (create a PeerNetwork instance)\n" "addpeer -- add a peer to a given node\n" "delpeer -- add a peer to a given node\n" "del -- remove a node (destroy a PeerNetwork instance)\n" "msg -- send a text message to a node\n" "ls -- list all node ids\n" "sleep -- wait for some seconds\n" "exit -- quit the program\n" "help -- show this info\n" ); }; cmd_map.insert(std::make_pair("add", cmd_add)); cmd_map.insert(std::make_pair("addpeer", cmd_addpeer)); cmd_map.insert(std::make_pair("del", cmd_del)); cmd_map.insert(std::make_pair("delpeer", cmd_delpeer)); cmd_map.insert(std::make_pair("msg", cmd_msg)); cmd_map.insert(std::make_pair("ls", cmd_ls)); cmd_map.insert(std::make_pair("sleep", cmd_sleep)); cmd_map.insert(std::make_pair("exit", cmd_exit)); cmd_map.insert(std::make_pair("help", cmd_help)); bool is_tty = isatty(0); for (;;) { if (is_tty) fprintf(stdout, "> "); char buff[128]; if (scanf("%64s", buff) == EOF) break; auto it = cmd_map.find(buff); if (it == cmd_map.end()) fprintf(stdout, "invalid comand \"%s\"\n", buff); else (it->second)(buff); } return 0; }