elemental-ircd/libratbox/src/ports.c

/*
 *  ircd-ratbox: A slightly useful ircd.
 *  ports.c: Solaris ports compatible network routines.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2001 Adrian Chadd <adrian@creative.net.au>
 *  Copyright (C) 2002-2004 ircd-ratbox development team
 *  Copyright (C) 2005 Edward Brocklesby.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 *  USA
 *
 *  $Id: ports.c 26092 2008-09-19 15:13:52Z androsyn $
 */

#include <libratbox_config.h>
#include <ratbox_lib.h>
#include <commio-int.h>

#if defined(HAVE_PORT_H) && (HAVE_PORT_CREATE)

#include <port.h>


#define PE_LENGTH	128

static void pe_update_events(rb_fde_t *, short, PF *);
static int pe;
static struct timespec zero_timespec;

static port_event_t *pelst;	/* port buffer */
static int pemax;		/* max structs to buffer */

int
rb_setup_fd_ports(int fd)
{
	return 0;
}


static void
pe_update_events(rb_fde_t *F, short filter, PF * handler)
{
	PF *cur_handler = NULL;

	if(filter == POLLRDNORM)
		cur_handler = F->read_handler;
	else if(filter == POLLWRNORM)
		cur_handler = F->write_handler;

	if(!cur_handler && handler)
		port_associate(pe, PORT_SOURCE_FD, F->fd, filter, F);
	else if(cur_handler && !handler)
		port_dissociate(pe, PORT_SOURCE_FD, F->fd);
}

/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
/* Public functions */


/*
 * rb_init_netio
 *
 * This is a needed exported function which will be called to initialise
 * the network loop code.
 */
int
rb_init_netio_ports(void)
{
	if((pe = port_create()) < 0)
	{
		return errno;
	}
	pemax = getdtablesize();
	pelst = rb_malloc(sizeof(port_event_t) * pemax);
	zero_timespec.tv_sec = 0;
	zero_timespec.tv_nsec = 0;
}

/*
 * rb_setselect
 *
 * This is a needed exported function which will be called to register
 * and deregister interest in a pending IO state for a given FD.
 */
void
rb_setselect_ports(rb_fde_t *F, unsigned int type, PF * handler, void *client_data)
{
	lrb_assert(IsFDOpen(F));

	/* Update the list, even though we're not using it .. */
	if(type & RB_SELECT_READ)
	{
		pe_update_events(F, POLLRDNORM, handler);
		F->read_handler = handler;
		F->read_data = client_data;
	}
	if(type & RB_SELECT_WRITE)
	{
		pe_update_events(F, POLLWRNORM, handler);
		F->write_handler = handler;
		F->write_data = client_data;
	}
}

/*
 * rb_select
 *
 * Called to do the new-style IO, courtesy of squid (like most of this
 * new IO code). This routine handles the stuff we've hidden in
 * rb_setselect and fd_table[] and calls callbacks for IO ready
 * events.
 */

int
rb_select_ports(long delay)
{
	int i, fd;
	uint nget = 1;
	struct timespec poll_time;
	struct timer_data *tdata;

	poll_time.tv_sec = delay / 1000;
	poll_time.tv_nsec = (delay % 1000) * 1000000;

	i = port_getn(pe, pelst, pemax, &nget, &poll_time);
	rb_set_time();

	if(i == -1)
		return RB_OK;

	for(i = 0; i < nget; i++)
	{
		switch (pelst[i].portev_source)
		{
		case PORT_SOURCE_FD:
			fd = pelst[i].portev_object;
			PF *hdl = NULL;
			rb_fde_t *F = rb_find_fd(fd);

			if((pelst[i].portev_events & POLLRDNORM) && (hdl = F->read_handler))
			{
				F->read_handler = NULL;
				hdl(F, F->read_data);
			}
			if((pelst[i].portev_events & POLLWRNORM) && (hdl = F->write_handler))
			{
				F->write_handler = NULL;
				hdl(F, F->write_data);
			}
			break;
		}
	}
	return RB_OK;
}

#else /* ports not supported */
int
rb_init_netio_ports(void)
{
	return ENOSYS;
}

void
rb_setselect_ports(rb_fde_t *F, unsigned int type, PF * handler, void *client_data)
{
	errno = ENOSYS;
	return;
}

int
rb_select_ports(long delay)
{
	errno = ENOSYS;
	return -1;
}

int
rb_setup_fd_ports(rb_fde_t *F)
{
	errno = ENOSYS;
	return -1;
}


#endif