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/**
* Copyright (c) 2018 Cornell University.
*
* Author: Ted Yin <tederminant@gmail.com>
*
* 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 <cstdint>
#include <string>
#include <functional>
#include <unordered_map>
#include "salticidae/msg.h"
#include "salticidae/event.h"
#include "salticidae/network.h"
#include "salticidae/stream.h"
using salticidae::NetAddr;
using salticidae::DataStream;
using salticidae::PeerNetwork;
using salticidae::htole;
using salticidae::letoh;
using salticidae::EventContext;
using salticidae::ThreadCall;
using std::placeholders::_1;
using std::placeholders::_2;
struct Net {
uint64_t id;
EventContext ec;
ThreadCall tc;
std::thread th;
PeerNetwork<uint8_t> *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 salticidae::PeerNetwork<uint8_t>(
ec,
salticidae::PeerNetwork<uint8_t>::Config().conn_timeout(5).ping_period(2));
net->reg_error_handler([this](const std::exception &err, bool fatal) {
fprintf(stdout, "net %lu: captured %s error during an async call: %s\n", this->id, fatal ? "fatal" : "recoverable", err.what());
});
net->reg_unknown_peer_handler([this](const NetAddr &addr) {
fprintf(stdout, "net %lu: unknown peer attempts to connnect %s\n", this->id, std::string(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<uint64_t, Net *> nets;
std::unordered_map<std::string, std::function<void(char *)> > 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_help = [](char *) {
fprintf(stdout,
"add <node-id> <port> -- start a node (create a PeerNetwork instance)\n"
"addpeer <node-id> <peer-id> -- add a peer to a given node\n"
"rmpeer <node-id> <peer-id> -- add a peer to a given node\n"
"rm <node-id> -- remove a node (destroy a PeerNetwork instance)\n"
"ls -- list all node ids\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("ls", cmd_ls));
cmd_map.insert(std::make_pair("exit", cmd_exit));
cmd_map.insert(std::make_pair("help", cmd_help));
for (;;)
{
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;
}
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