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#include "core.h"
#include "dns.h"
Server::Server(NetCore *_netCore) : SocketRWCommon(_netCore) {
dnsQueryId = -1;
}
Server::~Server() {
if (dnsQueryId != -1)
DNS::closeQuery(dnsQueryId);
close();
}
void Server::processReadBuffer() {
// Try to process as many lines as we can
char *buf = inputBuf.data();
int bufSize = inputBuf.size();
int lineBegin = 0, pos = 0;
while (pos < bufSize) {
if (buf[pos] == '\r' || buf[pos] == '\n') {
if (pos > lineBegin) {
buf[pos] = 0;
lineReceivedEvent(&buf[lineBegin], pos - lineBegin);
}
lineBegin = pos + 1;
}
pos++;
}
// If we managed to handle anything, lop it off the buffer
inputBuf.trimFromStart(lineBegin);
}
void Server::sendLine(const char *line) {
outputBuf.append(line, strlen(line));
outputBuf.append("\r\n", 2);
}
void Server::connect(const char *hostname, int _port, bool _useTls) {
if (state == CS_DISCONNECTED) {
port = _port;
useTls = _useTls;
DNS::closeQuery(dnsQueryId); // just in case
dnsQueryId = DNS::makeQuery(hostname);
if (dnsQueryId == -1) {
// TODO: better error reporting
printf("DNS query failed!\n");
} else {
state = CS_WAITING_DNS;
}
}
}
void Server::tryConnectPhase() {
if (state == CS_WAITING_DNS) {
in_addr result;
bool isError;
if (DNS::checkQuery(dnsQueryId, &result, &isError)) {
DNS::closeQuery(dnsQueryId);
dnsQueryId = -1;
if (isError) {
printf("DNS query failed at phase 2!\n");
state = CS_DISCONNECTED;
} else {
// OK, if there was no error, we can go ahead and do this...
sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == -1) {
perror("[Server] Failed to socket()");
close();
return;
}
if (!setSocketNonBlocking(sock)) {
perror("[Server] Could not set non-blocking");
close();
return;
}
// We have our non-blocking socket, let's try connecting!
sockaddr_in outAddr;
outAddr.sin_family = AF_INET;
outAddr.sin_port = htons(port);
outAddr.sin_addr.s_addr = result.s_addr;
if (::connect(sock, (sockaddr *)&outAddr, sizeof(outAddr)) == -1) {
if (errno == EINPROGRESS) {
state = CS_WAITING_CONNECT;
} else {
perror("[Server] Could not connect");
close();
}
} else {
// Whoa, we're connected? Neat.
connectionSuccessful();
}
}
}
}
}
void Server::connectionSuccessful() {
state = CS_CONNECTED;
inputBuf.clear();
outputBuf.clear();
// Do we need to do any TLS junk?
#ifdef USE_GNUTLS
if (useTls) {
state = CS_TLS_HANDSHAKE;
int initRet = gnutls_init(&tls, GNUTLS_CLIENT);
if (initRet != GNUTLS_E_SUCCESS) {
printf("[Server::connectionSuccessful] gnutls_init borked\n");
gnutls_perror(initRet);
close();
return;
}
// TODO: error check this
const char *errPos;
gnutls_priority_set_direct(tls, "NORMAL", &errPos);
gnutls_credentials_set(tls, GNUTLS_CRD_CERTIFICATE, g_serverCreds);
gnutls_transport_set_int(tls, sock);
tlsActive = true;
} else
#endif
{
connectedEvent();
}
}
void Server::close() {
int saveState = state;
SocketRWCommon::close();
if (dnsQueryId != -1) {
DNS::closeQuery(dnsQueryId);
dnsQueryId = -1;
}
if (saveState == CS_CONNECTED)
disconnectedEvent();
}
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