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#include <cassert>
#include "salticidae/type.h"
#include "salticidae/netaddr.h"
#include "salticidae/network.h"
#include "salticidae/util.h"
#include "hotstuff/util.h"
#include "hotstuff/type.h"
#include "hotstuff/client.h"
using salticidae::Config;
using salticidae::ElapsedTime;
using salticidae::trim_all;
using salticidae::split;
using hotstuff::ReplicaID;
using hotstuff::NetAddr;
using hotstuff::EventContext;
using hotstuff::Event;
using hotstuff::uint256_t;
using hotstuff::bytearray_t;
using hotstuff::MsgClient;
using hotstuff::CommandDummy;
using hotstuff::command_t;
using hotstuff::Finality;
EventContext eb;
size_t max_async_num = 10;
int max_iter_num = 100;
ReplicaID proposer;
int connect(const NetAddr &node) {
int fd;
if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
assert(0);
struct sockaddr_in sockin;
memset(&sockin, 0, sizeof(struct sockaddr_in));
sockin.sin_family = AF_INET;
sockin.sin_addr.s_addr = node.ip;
sockin.sin_port = node.port;
if (connect(fd, (struct sockaddr *)&sockin, sizeof(struct sockaddr_in)) == -1)
assert(0);
HOTSTUFF_LOG_INFO("connected to %s", std::string(node).c_str());
return fd;
}
void on_receive(int);
struct Request {
ReplicaID rid;
command_t cmd;
ElapsedTime et;
Request(ReplicaID rid, const command_t &cmd):
rid(rid), cmd(cmd) { et.start(); }
};
struct Conn {
int fd;
Event on_receive_ev;
Conn(const NetAddr &addr):
fd(connect(addr)),
on_receive_ev(eb, fd, EV_READ, [this](int fd, short) {
on_receive(fd);
on_receive_ev.add();
}) { on_receive_ev.add(); }
Conn(Conn &&other):
fd(other.fd),
on_receive_ev(eb, fd, EV_READ, [this](int fd, short) {
on_receive(fd);
on_receive_ev.add();
}) {
other.fd = -1;
other.on_receive_ev.del();
on_receive_ev.add();
}
~Conn() { if (fd != -1) close(fd); }
};
std::unordered_map<int, salticidae::RingBuffer> buffers;
std::unordered_map<const uint256_t, Request> waiting;
std::unordered_map<ReplicaID, Conn> conns;
std::vector<NetAddr> replicas;
void setup(ReplicaID rid) {
proposer = rid;
auto it = conns.find(rid);
if (it == conns.end())
conns.insert(std::make_pair(rid, Conn(replicas[rid])));
}
void write_msg(int fd, const MsgClient &msg) {
bytearray_t msg_data = msg.serialize();
if (write(fd, msg_data.data(), msg_data.size()) != (ssize_t)msg_data.size())
assert(0);
}
void read_msg(int fd, MsgClient &msg) {
static const size_t BUFF_SEG_SIZE = 1024;
ssize_t ret;
auto &buffer = buffers[fd];
bool read_body = false;
for (;;)
{
bytearray_t buff_seg;
if (!read_body && buffer.size() >= MsgClient::header_size)
{
buff_seg = buffer.pop(MsgClient::header_size);
msg = MsgClient(buff_seg.data());
read_body = true;
}
if (read_body && buffer.size() >= msg.get_length())
{
buff_seg = buffer.pop(msg.get_length());
msg.set_payload(std::move(buff_seg));
return;
}
buff_seg.resize(BUFF_SEG_SIZE);
ret = read(fd, buff_seg.data(), BUFF_SEG_SIZE);
assert(ret != -1);
if (ret > 0)
{
buff_seg.resize(ret);
buffer.push(std::move(buff_seg));
}
}
}
void try_send() {
while (waiting.size() < max_async_num && max_iter_num)
{
auto cmd = CommandDummy::make_cmd();
MsgClient msg;
msg.gen_reqcmd(*cmd);
write_msg(conns.find(proposer)->second.fd, msg);
HOTSTUFF_LOG_INFO("send new cmd %.10s",
get_hex(cmd->get_hash()).c_str());
waiting.insert(std::make_pair(
cmd->get_hash(), Request(proposer, cmd)));
if (max_iter_num > 0)
max_iter_num--;
}
}
void on_receive(int fd) {
MsgClient msg;
uint256_t cmd_hash;
Finality fin;
read_msg(fd, msg);
HOTSTUFF_LOG_DEBUG("got %s", std::string(msg).c_str());
if (!msg.verify_checksum())
HOTSTUFF_LOG_ERROR("incorrect checksum %08x", msg.get_checksum());
msg.parse_respcmd(cmd_hash, fin);
auto it = waiting.find(cmd_hash);
if (fin.rid != proposer)
{
HOTSTUFF_LOG_INFO("reconnect to the new proposer");
setup(fin.rid);
}
if (fin.rid != it->second.rid)
{
MsgClient msg;
msg.gen_reqcmd(*(waiting.find(cmd_hash)->second.cmd));
write_msg(conns.find(proposer)->second.fd, msg);
HOTSTUFF_LOG_INFO("resend cmd %.10s",
get_hex(cmd_hash).c_str());
it->second.et.start();
it->second.rid = proposer;
return;
}
HOTSTUFF_LOG_INFO(
"fd %d got response for %.10s: <decision=%d, blk=%.10s>",
fd, get_hex(cmd_hash).c_str(),
fin.decision,
get_hex(fin.blk_hash).c_str());
if (it == waiting.end()) return;
waiting.erase(it);
try_send();
}
std::pair<std::string, std::string> split_ip_port_cport(const std::string &s) {
auto ret = trim_all(split(s, ";"));
return std::make_pair(ret[0], ret[1]);
}
int main(int argc, char **argv) {
Config config("hotstuff.conf");
auto opt_idx = Config::OptValInt::create(0);
auto opt_replicas = Config::OptValStrVec::create();
auto opt_max_iter_num = Config::OptValInt::create();
try {
config.add_opt("idx", opt_idx, Config::SET_VAL);
config.add_opt("replica", opt_replicas, Config::APPEND);
config.add_opt("ntx", opt_max_iter_num, Config::SET_VAL);
config.parse(argc, argv);
auto idx = opt_idx->get();
max_iter_num = opt_max_iter_num->get();
std::vector<std::pair<std::string, std::string>> raw;
for (const auto &s: opt_replicas->get())
{
auto res = trim_all(split(s, ","));
assert(res.size() == 2);
raw.push_back(std::make_pair(res[0], res[1]));
}
if (!(0 <= idx && (size_t)idx < raw.size() &&
raw.size() > 0))
throw std::invalid_argument("out of range");
for (const auto &p: raw)
{
auto _p = split_ip_port_cport(p.first);
size_t _;
replicas.push_back(NetAddr(NetAddr(_p.first).ip, htons(stoi(_p.second, &_))));
}
setup(idx);
try_send();
eb.dispatch();
} catch (hotstuff::HotStuffError &e) {
HOTSTUFF_LOG_ERROR("exception: %s", std::string(e).c_str());
}
return 0;
}
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