mirror of
https://github.com/XTXMarkets/ternfs.git
synced 2026-01-02 08:59:36 -06:00
269 lines
8.0 KiB
C++
269 lines
8.0 KiB
C++
#include <fcntl.h>
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#include <sstream>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <array>
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#include <charconv>
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#include <stdio.h>
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#include <memory>
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#include <netinet/tcp.h>
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#include "Bincode.hpp"
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#include "Msgs.hpp"
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#include "MsgsGen.hpp"
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#include "Shuckle.hpp"
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#include "Exception.hpp"
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static std::string generateErrString(const std::string& what, int err) {
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const char *errmsg = safe_strerror(err);
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std::stringstream ss;
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ss << "could not " << what << ": " << err << "/" << translateErrno(err) << "=" << errmsg;
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return ss.str();
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}
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static std::mutex gethostbynameMutex;
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static int shuckleSock(const std::string& host, uint16_t port, Duration timeout, std::string& errString) {
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struct hostent* he;
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{
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// too lazy to learn getaddrinfo
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std::lock_guard<std::mutex> lock(gethostbynameMutex);
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he = gethostbyname(host.c_str());
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if (he == nullptr) {
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throw EGGS_EXCEPTION("could not get address for host %s", host);
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}
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}
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// nonblock at the beginning for connect timeout
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int sock = socket(AF_INET, SOCK_STREAM, 0);
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if (sock < 0) {
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throw SYSCALL_EXCEPTION("socket");
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}
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int synRetries = 1;
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setsockopt(sock, IPPROTO_TCP, TCP_SYNCNT, &synRetries, sizeof(synRetries));
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struct sockaddr_in shuckleAddr;
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shuckleAddr.sin_family = AF_INET;
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shuckleAddr.sin_addr = *(struct in_addr*)he->h_addr_list[0];
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shuckleAddr.sin_port = htons(port);
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if (connect(sock, (struct sockaddr*)&shuckleAddr, sizeof(shuckleAddr)) < 0) {
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errString = generateErrString("connect to " + host, errno);
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close(sock);
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return -1;
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}
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struct timeval tv;
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tv.tv_sec = timeout.ns/1'000'000'000ull;
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tv.tv_usec = (timeout.ns%1'000'000'000ull)/1'000;
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if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
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throw SYSCALL_EXCEPTION("setsockopt");
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}
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return sock;
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}
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static std::string writeShuckleRequest(int fd, const ShuckleReqContainer& req) {
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static_assert(std::endian::native == std::endian::little);
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// Serialize
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std::vector<char> buf(req.packedSize());
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BincodeBuf bbuf(buf.data(), buf.size());
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req.pack(bbuf);
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// Write out
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#define WRITE_OUT(buf, len) \
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do { \
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ssize_t written = write(fd, buf, len); \
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if (written < 0) { \
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return generateErrString("write request", errno); \
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} \
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if (written != len) { \
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return "couldn't write full request"; \
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} \
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} while (false)
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WRITE_OUT(&SHUCKLE_REQ_PROTOCOL_VERSION, sizeof(SHUCKLE_REQ_PROTOCOL_VERSION));
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uint32_t len = 1 + bbuf.len();
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WRITE_OUT(&len, sizeof(len));
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auto kind = req.kind();
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WRITE_OUT(&kind, sizeof(kind));
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WRITE_OUT(bbuf.data, bbuf.len());
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#undef WRITE_OUT
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return {};
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}
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static std::string readShuckleResponse(int fd, ShuckleRespContainer& resp) {
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static_assert(std::endian::native == std::endian::little);
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#define READ_IN(buf, count) \
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do { \
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ssize_t readSoFar = 0; \
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while (readSoFar < count) { \
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ssize_t r = read(fd, buf+readSoFar, count-readSoFar); \
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if (r < 0) { \
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return generateErrString("read response", errno); \
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} \
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if (r == 0) { \
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return "unexpected EOF"; \
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} \
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readSoFar += r; \
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} \
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} while (0)
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uint32_t protocol;
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READ_IN(&protocol, sizeof(protocol));
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if (protocol != SHUCKLE_RESP_PROTOCOL_VERSION) {
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throw BINCODE_EXCEPTION("bad shuckle protocol (expected %s, got %s)", SHUCKLE_RESP_PROTOCOL_VERSION, protocol);
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}
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uint32_t len;
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READ_IN(&len, sizeof(len));
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ShuckleMessageKind kind;
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READ_IN(&kind, sizeof(kind));
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std::vector<char> buf(len-1);
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READ_IN(buf.data(), buf.size());
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#undef READ_IN
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BincodeBuf bbuf(buf.data(), buf.size());
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resp.unpack(bbuf, kind);
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return {};
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}
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std::string fetchBlockServices(const std::string& addr, uint16_t port, Duration timeout, ShardId shid, UpdateBlockServicesEntry& blocks) {
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std::string errString;
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int sock = shuckleSock(addr, port, timeout, errString);
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if (sock < 0) {
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return errString;
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}
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ShuckleReqContainer reqContainer;
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auto& req = reqContainer.setBlockServicesForShard();
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req.shard = shid;
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errString = writeShuckleRequest(sock, reqContainer);
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if (!errString.empty()) {
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return errString;
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}
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ShuckleRespContainer respContainer;
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errString = readShuckleResponse(sock, respContainer);
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if (!errString.empty()) {
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return errString;
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}
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blocks.blockServices = respContainer.getBlockServicesForShard().blockServices;
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return {};
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}
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std::string registerShard(
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const std::string& addr, uint16_t port, Duration timeout, ShardId shid, const std::array<uint8_t, 4>& shardAddr, uint16_t shardPort
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) {
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std::string errString;
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int sock = shuckleSock(addr, port, timeout, errString);
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if (sock < 0) {
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return errString;
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}
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ShuckleReqContainer reqContainer;
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auto& req = reqContainer.setRegisterShard();
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req.id = shid;
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req.info.ip.data = shardAddr;
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req.info.port = shardPort;
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errString = writeShuckleRequest(sock, reqContainer);
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if (!errString.empty()) {
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return errString;
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}
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ShuckleRespContainer respContainer;
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errString = readShuckleResponse(sock, respContainer);
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if (!errString.empty()) {
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return errString;
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}
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respContainer.getRegisterShard();
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return {};
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}
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std::string registerCDC(const std::string& host, uint16_t port, Duration timeout, const std::array<uint8_t, 4>& cdcAddr, uint16_t cdcPort) {
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std::string errString;
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int sock = shuckleSock(host, port, timeout, errString);
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if (sock < 0) {
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return errString;
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}
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ShuckleReqContainer reqContainer;
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auto& req = reqContainer.setRegisterCdc();
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req.ip.data = cdcAddr;
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req.port = cdcPort;
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errString = writeShuckleRequest(sock, reqContainer);
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if (!errString.empty()) {
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return errString;
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}
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ShuckleRespContainer respContainer;
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errString = readShuckleResponse(sock, respContainer);
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if (!errString.empty()) {
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return errString;
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}
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respContainer.getRegisterCdc();
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return {};
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}
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std::string fetchShards(const std::string& host, uint16_t port, Duration timeout, std::array<ShardInfo, 256>& shards) {
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std::string errString;
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int sock = shuckleSock(host, port, timeout, errString);
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if (sock < 0) {
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return errString;
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}
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ShuckleReqContainer reqContainer;
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reqContainer.setShards();
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errString = writeShuckleRequest(sock, reqContainer);
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if (!errString.empty()) {
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return errString;
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}
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ShuckleRespContainer respContainer;
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errString = readShuckleResponse(sock, respContainer);
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if (!errString.empty()) {
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return errString;
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}
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if (respContainer.getShards().shards.els.size() != shards.size()) {
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throw EGGS_EXCEPTION("expecting %s shards, got %s", shards.size(), respContainer.getShards().shards.els.size());
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}
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for (int i = 0; i < shards.size(); i++) {
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shards[i] = respContainer.getShards().shards.els[i];
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}
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return {};
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}
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bool parseShuckleAddress(const std::string& fullShuckleAddress, std::string& shuckleHost, uint16_t& shucklePort) {
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// split host:port
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auto colon = fullShuckleAddress.find(":");
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if (colon == fullShuckleAddress.size()) {
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std::cerr << "Could not find colon" << std::endl;
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return false;
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}
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// parse port
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if (fullShuckleAddress.size() - colon > 6) {
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return false; // port too long
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}
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uint32_t port = 0;
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for (int i = colon + 1; i < fullShuckleAddress.size(); i++) {
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char ch = fullShuckleAddress[i];
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if ((i == colon + 1 && ch == '0') || ch < '0' || ch > '9') {
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return false;
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}
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port = port*10 + (ch-'0');
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}
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if (port == 0 || port > 65535) {
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return false;
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}
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shucklePort = port;
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shuckleHost = {fullShuckleAddress.begin(), fullShuckleAddress.begin()+colon};
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return true;
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} |