solanum-vs-hackint-and-char.../libcharybdis/ports.c

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/*
* charybdis: 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.
* Copyright (C) 2005 William Pitcock and Jilles Tjoelker
* Copyright (C) 2007 River Tarnell
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* $Id: ports.c 3366 2007-04-03 09:57:53Z nenolod $
*/
#include "stdinc.h"
#include <port.h>
#include <time.h>
#include "stdinc.h"
#include "res.h"
#include "numeric.h"
#include "tools.h"
#include "memory.h"
#include "balloc.h"
#include "linebuf.h"
#include "sprintf_irc.h"
#include "commio.h"
#include "ircevent.h"
#include "modules.h"
static int comm_init(void);
static void comm_deinit(void);
static int comm_select_impl(unsigned long delay);
static void comm_setselect_impl(int fd, unsigned int type, PF * handler, void *client_data, time_t timeout);
static void pe_update_events(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 */
static void
pe_update_events(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 */
/*
* init_netio
*
* This is a needed exported function which will be called to initialise
* the network loop code.
*/
static int
init_netio(void)
{
if((pe = port_create()) < 0) {
ilog(L_MAIN, "init_netio: Couldn't open port fd!\n");
exit(115); /* Whee! */
}
pemax = getdtablesize();
pelst = MyMalloc(sizeof(port_event_t) * pemax);
zero_timespec.tv_sec = 0;
zero_timespec.tv_nsec = 0;
return 0;
}
/*
* ircd_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
comm_setselect(int fd, unsigned int type, PF * handler,
void *client_data, time_t timeout)
{
fde_t *F = &fd_table[fd];
s_assert(fd >= 0);
s_assert(F->flags.open);
if (type & COMM_SELECT_READ) {
pe_update_events(F, POLLRDNORM, handler);
F->read_handler = handler;
F->read_data = client_data;
}
if (type & COMM_SELECT_WRITE) {
pe_update_events(F, POLLWRNORM, handler);
F->write_handler = handler;
F->write_data = client_data;
}
}
/*
* ircd_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
* ircd_setselect and fd_table[] and calls callbacks for IO ready
* events.
*/
int
comm_select(unsigned long delay)
{
int i, fd;
unsigned int nget = 1;
struct timespec poll_time;
poll_time.tv_sec = delay / 1000;
poll_time.tv_nsec = (delay % 1000) * 1000000;
i = port_getn(pe, pelst, pemax, &nget, &poll_time);
set_time();
if (i == -1)
return COMM_ERROR;
for (i = 0; i < nget; i++)
{
PF *hdl = NULL;
fde_t *F;
switch(pelst[i].portev_source)
{
case PORT_SOURCE_FD:
fd = pelst[i].portev_object;
F = &fd_table[fd];
if ((pelst[i].portev_events & POLLRDNORM) && (hdl = F->read_handler)) {
F->read_handler = NULL;
hdl(fd, F->read_data);
}
if (F->flags.open == 0)
continue;
if ((pelst[i].portev_events & POLLWRNORM) && (hdl = F->write_handler)) {
F->write_handler = NULL;
hdl(fd, F->write_data);
}
break;
default:
break;
}
}
return COMM_OK;
}