Software Público Brasileiro

/*
 * "Software PW3270, desenvolvido com base nos códigos fontes do WC3270  e  X3270
 * (Paul Mattes Paul.Mattes@usa.net), de emulação de terminal 3270 para acesso a
 * aplicativos mainframe. Registro no INPI sob o nome G3270.
 *
 * Copyright (C) <2008> <Banco do Brasil S.A.>
 *
 * Este programa é software livre. Você pode redistribuí-lo e/ou modificá-lo sob
 * os termos da GPL v.2 - Licença Pública Geral  ',  conforme  publicado  pela
 * Free Software Foundation.
 *
 * Este programa é distribuído na expectativa de  ser  útil,  mas  SEM  QUALQUER
 * GARANTIA; sem mesmo a garantia implícita de COMERCIALIZAÇÃO ou  de  ADEQUAÇÃO
 * A QUALQUER PROPÓSITO EM PARTICULAR. Consulte a Licença Pública Geral GNU para
 * obter mais detalhes.
 *
 * Você deve ter recebido uma cópia da Licença Pública Geral GNU junto com este
 * programa; se não, escreva para a Free Software Foundation, Inc., 51 Franklin
 * St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Este programa está nomeado como unsecure.c e possui - linhas de código.
 *
 * Contatos:
 *
 * perry.werneck@gmail.com	(Alexandre Perry de Souza Werneck)
 * erico.mendonca@gmail.com	(Erico Mascarenhas de Mendonça)
 *
 */

/**
 * @brief Common methods for send/recv errors.
 *
 */

#include <config.h>
#include <lib3270.h>
#include <lib3270/log.h>
#include <internals.h>
#include <networking.h>
#include <fcntl.h>
#ifdef _WIN32
#include <lib3270/win32.h>
#endif // _WIN32

/*--[ Implement ]------------------------------------------------------------------------------------*/

int lib3270_socket_recv_failed(H3270 *hSession) {

#ifdef _WIN32

	int wsaError = WSAGetLastError();

	// EWOULDBLOCK & EAGAIN should return directly.
	if(wsaError == WSAEWOULDBLOCK)
		return -EWOULDBLOCK;

	if(wsaError == WSAEINPROGRESS)
		return -EAGAIN;

	int rc = -wsaError;

	// TODO: Translate WSA Error, update message body.

	lib3270_set_network_error(
		hSession,
		_("Error receiving data from host"),
		_("The windows error code was %u"),
		(unsigned int) wsaError
	);

#else

	// EWOULDBLOCK & EAGAIN should return directly.
	if(errno == EWOULDBLOCK || errno == EAGAIN)
		return -errno;

	// Network error, notify user
	int rc = -errno;

	lib3270_set_network_error(
		hSession,
		_("Error receiving data from host"),
		_("The system error code was %d (%s)"),
		errno,
		strerror(errno)
	);

#endif // _WIN32

	return rc;

}

int lib3270_socket_send_failed(H3270 *hSession) {

#ifdef _WIN32

	lib3270_set_network_error(
		hSession,
	    _("Erro sending data to host"),
		_("The windows error code was %u"),
		(unsigned int) WSAGetLastError()
	);

#else

	int rc = errno;

	switch(rc) {
	case EPIPE:
		lib3270_set_network_error(
			hSession,
		    _("Broken pipe"),
			_("The system error code was %d"),
			rc
		);
		break;

	case ECONNRESET:
		lib3270_set_network_error(
			hSession,
		    _("Connection reset by peer"),
			_("The system error code was %d"),
			rc
		);
		break;

	case EINTR:
		return 0;

	default:
		lib3270_set_network_error(
			hSession,
		    _("Unexpected error writing to network socket"),
		    _("The system error code was %d (%s)"),
		    rc, strerror(rc)
		);

	}

#endif // _WIN32

	return -1;

}

int lib3270_socket_set_non_blocking(H3270 *hSession, int sock, const unsigned char on) {

	if(sock < 0)
		return 0;

#ifdef WIN32

	WSASetLastError(0);
	u_long iMode= on ? 1 : 0;

	if(ioctlsocket(sock,FIONBIO,&iMode)) {
		lib3270_popup_dialog(	hSession,
		                        LIB3270_NOTIFY_ERROR,
		                        _( "Connection error" ),
		                        _( "ioctlsocket(FIONBIO) failed." ),
		                        "%s", lib3270_win32_strerror(GetLastError()));
		return -1;
	}

#else

	int f;

	if ((f = fcntl(sock, F_GETFL, 0)) == -1) {
		lib3270_popup_dialog(	hSession,
		                        LIB3270_NOTIFY_ERROR,
		                        _( "Socket error" ),
		                        _( "fcntl() error when getting socket state." ),
		                        _( "%s" ), strerror(errno)
		                    );

		return -1;
	}

	if (on)
		f |= O_NDELAY;
	else
		f &= ~O_NDELAY;

	if (fcntl(sock, F_SETFL, f) < 0) {
		lib3270_popup_dialog(	hSession,
		                        LIB3270_NOTIFY_ERROR,
		                        _( "Socket error" ),
		                        on ? _( "Can't set socket to blocking mode." ) : _( "Can't set socket to non blocking mode" ),
		                        _( "%s" ), strerror(errno)
		                    );
		return -1;
	}

#endif

	debug("Socket %d is now %s",sock,(on ? "Non Blocking" : "Blocking"));

	return 0;

}

static const char * crl_download_protocols[] = {
	NULL,
	"http",
	"https",
#ifdef HAVE_LDAP
	"ldap",
	"ldaps"
#endif // HAVE_LDAP
};

const char * lib3270_crl_get_preferred_protocol(const H3270 *hSession) {
	debug("%s: selected: %d",__FUNCTION__,(int) hSession->ssl.crl_preferred_protocol);
	if(hSession->ssl.crl_preferred_protocol < (sizeof(crl_download_protocols)/sizeof(crl_download_protocols[0])))
		return crl_download_protocols[hSession->ssl.crl_preferred_protocol];

	errno = EINVAL;
	return NULL;
}

int lib3270_crl_set_preferred_protocol(H3270 *hSession, const char *protocol) {
	FAIL_IF_ONLINE(hSession);

	debug("%s(%s)",__FUNCTION__,protocol);
	size_t ix;
	for(ix = 0; ix < (sizeof(crl_download_protocols)/sizeof(crl_download_protocols[0])); ix++) {

		debug("[%s] [%s]",protocol,crl_download_protocols[ix]);
		if(crl_download_protocols[ix] && !strcasecmp(protocol,crl_download_protocols[ix])) {
			hSession->ssl.crl_preferred_protocol = (unsigned short) ix;
			return 0;
		}
	}

	debug("Unsupported protocol: %s",protocol);

	return EINVAL;
}

LIB3270_EXPORT int lib3270_getpeername(H3270 *hSession, struct sockaddr *addr, socklen_t *addrlen) {
	FAIL_IF_NOT_ONLINE(hSession);
	return hSession->network.module->getpeername(hSession, addr, addrlen);
}

LIB3270_EXPORT int lib3270_getsockname(H3270 *hSession, struct sockaddr *addr, socklen_t *addrlen) {
	FAIL_IF_NOT_ONLINE(hSession);
	return hSession->network.module->getsockname(hSession, addr, addrlen);
}