void DAQPipe::connect()
{
printf("Connecting to %s on port %d... ",m_hostid,m_port);
#ifdef WIN32
{
struct sockaddr_in server;
hostent *hp;
SOCKET sock;
int retval;
if (! (hp = gethostbyname(m_hostid))
|| (sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
std::cerr << "Error resolving XCALDAQ server spec: "<<WSAGetLastError() << std::endl;
throw std::runtime_error("Failed to resolve XCALDAQ specification");
}
memcpy((char *)&server.sin_addr, hp->h_addr_list[0], hp->h_length);
server.sin_port = htons((short)portnum);
server.sin_family = AF_INET;
do
retval = connect(sock, (struct sockaddr *) &server, sizeof(server));
while (retval == -1 && errno == EINTR);
if (retval == -1)
{
closesocket(sock);
throw std::runtime_error("Failed to connect to XCALDAQ server");
}
m_socketID = sock;
}
#else
{
m_socketID = -1;
// try to get an adress once
m_socketID = u_connect(m_port,m_hostid);
if (m_socketID == -1)
{
// print an error
std::cout << std::endl << "Can't connect to host "<< m_hostid << " on port " << m_port;
// throw std::runtime_error("Failed to connect to XCALDAQ server");
m_fdValid = false;
std::cout << "failed!" << std::endl;
}
else
{
m_fdValid = true;
std::cout << "done!" << std::endl;
}
}
#endif
}
/*
This function is used to execute in a thread.
It will connect a server with hostname and port number.
It will send a full path of the named filename under the current working directory
to the server.
The server will return back a point to a number, if successful is 0, failed is 1.
The mutex lock is used to lock the communication process.
*/
void *threadconnect(void *arg) {
char flag[1];
int flag_num;
int bytescopied;
int communfd;
int error;
char compilepath[BLKSIZE];
int i =0;
const char *str_name;
struct connectpara *cp;
cp = (struct connectpara *)(arg);
u_port_t pn = 0;
char *hn = NULL;
char *fn = NULL;
pn = (*cp).portnumber;
hn = (*cp).hostname;
fn = (*cp).filename;
if ((communfd = u_connect(pn, hn)) == -1) {
perror("Failed to establish connection");
return NULL;
}
fprintf(stderr, "[%ld]:connection made to %s\n", (long)getpid(), hn);
str_name = fn;
getcwd(compilepath, BLKSIZE);
strcat(compilepath, "/");
strcat(compilepath, str_name);
strcat(compilepath, "\n");
if(r_write(communfd, compilepath, strlen(compilepath)) < 0) {
fprintf(stderr, "Could not write to communfd\n");
return NULL;
}
if ((i = r_read(communfd, flag, 1)) < 0) { //read flag from STDOUT_FILENO
fprintf(stderr, "Could not read flag from communfd.\n");
return NULL;
}
if(flag_num = (int) atoi(flag)) {
return &one;
}
else {
return &zero;
}
}
/* Open a connection to the given host and port for logging.
* If host is NULL, use the environment variable LOGGINGHOST if it is set;
* otherwise, use the host "localhost".
* If port is 0, use the environment variable LOGGINGPORT if it is set;
* otherwise, use the default port DEFAULT_PORT.
* Return a pointer to an LFILE if successful, or NULL if unsuccessful.
*/
LFILE *lopen(char *host, int port) {
int fd;
LFILE *mf;
char *portstr;
if (host == NULL) {
host = getenv("LOGGINGHOST");
if (host == NULL)
host = DEFAULT_HOST;
}
if (port <= 0) {
portstr = getenv("LOGGINGPORT");
if (portstr == NULL)
port = DEFAULT_PORT;
else
port = atoi(portstr);
}
fd = u_connect(port, host);
if (fd < 0) {
if (ldebug_flag)
fprintf(stderr, "Connection failed to host %s on port %d\n",
host,port);
return NULL;
}
mf = (LFILE *)malloc(sizeof(LFILE));
if (mf == NULL) {
if (ldebug_flag)
fprintf(stderr, "Memory allocation error for lopen\n");
return NULL;
}
#ifdef LUSETHREAD
if (pthread_mutex_lock(&ID_mutex))
return NULL;
#endif
mf->id = nextID++;
#ifdef LUSETHREAD
if (pthread_mutex_unlock(&ID_mutex))
return NULL;
#endif
mf->fd = fd;
mf->tmode = 0;
mf->gen[0] = 0;
go_through_pipe(mf);
#ifdef LSENDTIME
lsendtime(mf);
#endif
return mf;
}
int abreConexao(IdPeer& peer)
{
char sIp[TAM_STR_IP+1];
int sockfd;
printf("****Entrei****\n");
IdPeer2StrIp(sIp, peer);
printf("Vou tentar estabelecer nova conexao com o peer: %s\n", sIp);
sockfd = u_connect(peer.porta, sIp);
printf("Socket: %d\n", sockfd);
FD_SET(sockfd, &allset); // Seta o bit para o novo descritor no set de descritores q estao sendo tratados por "select"
if(sockfd > maxfd)
maxfd = sockfd;
printf("****Saindo****\n");
return sockfd;
}
void * SelecionaDescritores(void *args) {
// Indica se o socket com o nó principal esta ativo.
bool flagSockConectado = false;
// Sockets a serem manipulados.
int sockfd = -1;
int accfd = -1;
int listenfd = -1;
// Porta e ip do servidor principal.
int portaConnect;
char servidor[TAM_STR_IP + 1];
// Ponteiro p/ argumentos.
TpArgumento * argumentos;
char maquina[MAX_CANON];
//Variaveis necessarias para o uso de "select".
//int i;
//int maxi;
int nready;
int peerfd; //Armazena temporariamente o descritor que estah sendo checado.
// Inicializa variaveis.
argumentos = (TpArgumento *)args;
listenfd = argumentos->listenfd;
portaConnect = argumentos->portaConnect; // Se for -1 eh pq eh um noh principal
strcpy(servidor, argumentos->ipConnect); // Se for NULL eh pq eh um noh principal
maxfd = listenfd; // Valor inteiro do maior descritor utilizado. Inicialmente soh temos o listenfd
//maxi = -1;
FD_ZERO(&allset); // Zera todos os bits do set de descritores que serao checados
FD_SET(listenfd, &allset); // Seta o bit do listenfd, ou seja, coloca listenfd no set de descritores q sera usado por "select"
FD_SET(fileno(stdin), &allset);
if(fileno(stdin) > maxfd)
maxfd = fileno(stdin);
if(!DadosAplicacao.principal) {
puts("Entrou como naum principal");
while((sockfd = u_connect(portaConnect, servidor)) == -1) {
sleep(1);
puts("Tentando conectar no peer principal...");
}
DadosAplicacao.sockPrincipalConectado = sockfd;
if(sockfd >= 0) {
FD_SET(sockfd, &allset); // Utiliza-se esse socket para falar com o noh principal
if(sockfd > maxfd)
maxfd = sockfd;
insereTabelaSocket(sockfd);
flagSockConectado = true;
}
}
// 'zSeta' os TIMER's.
SetTimer( DadosAplicacao.intervaloHello, TIMER_HELLO, 0 );
for(;;) {
#ifdef DEBUG
fprintf(stdout, "\nInicio do FOR\n");
fprintf(stdout, "SockPrincipal: %d\n\n\n", DadosAplicacao.sockPrincipalConectado);
#endif
if(DadosAplicacao.principal && (DadosAplicacao.sockPrincipalConectado != -1) && (!flagSockConectado)) {
sockfd = DadosAplicacao.sockPrincipalConectado;
if(sockfd >= 0) {
FD_SET(sockfd, &allset); // Utiliza-se esse socket para falar com o noh principal
if(sockfd > maxfd)
maxfd = sockfd;
insereTabelaSocket(sockfd);
flagSockConectado = true;
}
}
// Seta o conjunto de descritores que serah checado para eventos do tipo "read"
rset = allset;
#ifdef DEBUG
if(RetornaTimer() == NULL) fprintf(stdout, "Timer NULL\n");
else imprimeTimer();
#endif
//printf("\nANTES DO SELECT:\n");
//printf("nready: %d\terrno: %d(%d)\n\n", nready, errno, EINTR);
// Retorna o numero de sockets prontos ou zero caso seja um evento de timeout.
while(((nready = select(maxfd + 1, &rset, NULL, NULL, RetornaTimer()) ) == -1) && (errno == EINTR));
//printf("\n-----> SELECT <-----\n");
// Caso select retorne -1 e o tipo de erro naum seja interrupcao
if( nready == -1 ) {
printf("\n-----> ERRO SELECT <-----\n");
puts(strerror(errno));
exit(1);
}
//*********************************
// TRATA EVENTO DE TIMEOUT
//*********************************
if(nready == 0) {
// printf("\n-----> TIMER <-----\n");
#ifdef DEBUG
puts("Vou chamar o trataTimer");
#endif
trataTimer();
}
//*********************************
// TRATA PEDIDOS DE CONEXOES
//*********************************
if(FD_ISSET(listenfd, &rset))
{
printf("\n-----> CONEXAO <-----\n");
//fprintf(stdout, "*** Listen ***\n");
if((accfd = u_accept(listenfd, maquina)) >= 0)
{
puts("Conectou");
insereTabelaSocket(accfd);
}
else{
// TODO Accept deu erro - TRATAR
}
FD_SET(accfd, &allset); // Seta o bit para o novo descritor no set de descritores q estao sendo tratados por "select"
if(accfd > maxfd)
maxfd = accfd; // Variavel q sera utilizada na chamada a "select"
if(--nready <= 0) // Caso o unico descritor setado for o listenfd
continue; // Nao ha mais descritores pendentes de serem tratados
}
//**********************************
// TRATA EVENTOS DE TECLADO
//**********************************
if( FD_ISSET( fileno(stdin), &rset ) ) {
printf("\n-----> TECLADO <-----\n");
fprintf(stdout, "*** Teclado ***\n");
readCmdLine();
}
//***********************************
// TRATA RECEBIMENTO DE MENSAGENS
//***********************************
if((peerfd = encontraTabelaSocketPorRSet(rset)) != -1) {
//#ifdef DEBUG
// printf("\n-----> MENSAGEM <-----\n");
// printf("Socket: %d\n", peerfd);
//#endif
trataRecebimento(peerfd);
if (--nready <= 0 )
continue;
}
}
}
