libseven/ports.c

   1 /*
   2  *  charybdis: A slightly useful ircd.
   3  *  ports.c: Solaris ports compatible network routines.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2001 Adrian Chadd <adrian@creative.net.au>
   8  *  Copyright (C) 2002-2004 ircd-ratbox development team
   9  *  Copyright (C) 2005 Edward Brocklesby.
  10  *  Copyright (C) 2005 William Pitcock and Jilles Tjoelker
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  25  *  USA
  26  *
  27  *  $Id: ports.c 181 2006-12-18 02:56:07Z beu $
  28  */
  29
  30 #include "stdinc.h"
  31 #include <port.h>
  32 #include <time.h>
  33
  34 #include "libseven.h"
  35
  36 #define PE_LENGTH       128
  37
  38 static void pe_update_events(fde_t *, short, PF *);
  39 static int pe;
  40 static struct timespec zero_timespec;
  41
  42 static port_event_t *pelst;     /* port buffer */
  43 static int pemax;               /* max structs to buffer */
  44
  45 int
  46 ircd_setup_fd(int fd)
  47 {
  48         return 0;
  49 }
  50
  51
  52 void
  53 pe_update_events(fde_t * F, short filter, PF * handler)
  54 {
  55         PF *cur_handler = NULL;
  56
  57         if (filter == POLLRDNORM)
  58                 cur_handler = F->read_handler;
  59         else if (filter == POLLWRNORM)
  60                 cur_handler = F->write_handler;
  61
  62         if (!cur_handler && handler)
  63                 port_associate(pe, PORT_SOURCE_FD, F->fd, filter, F);
  64         else if (cur_handler && !handler)
  65                 port_dissociate(pe, PORT_SOURCE_FD, F->fd);
  66 }
  67
  68 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
  69 /* Public functions */
  70
  71
  72 /*
  73  * init_netio
  74  *
  75  * This is a needed exported function which will be called to initialise
  76  * the network loop code.
  77  */
  78 void
  79 init_netio(void)
  80 {
  81         if((pe = port_create()) < 0) {
  82                 libseven_log("init_netio: Couldn't open port fd!\n");
  83                 exit(115);      /* Whee! */
  84         }
  85         pemax = getdtablesize();
  86         pelst = MyMalloc(sizeof(port_event_t) * pemax);
  87         zero_timespec.tv_sec = 0;
  88         zero_timespec.tv_nsec = 0;
  89 }
  90
  91 /*
  92  * ircd_setselect
  93  *
  94  * This is a needed exported function which will be called to register
  95  * and deregister interest in a pending IO state for a given FD.
  96  */
  97 void
  98 ircd_setselect(int fd, fdlist_t list, unsigned int type, PF * handler,
  99                void *client_data)
 100 {
 101         fde_t *F = &fd_table[fd];
 102         s_assert(fd >= 0);
 103         s_assert(F->flags.open);
 104
 105         /* Update the list, even though we're not using it .. */
 106         F->list = list;
 107
 108         if(type & IRCD_SELECT_READ) {
 109                 pe_update_events(F, POLLRDNORM, handler);
 110                 F->read_handler = handler;
 111                 F->read_data = client_data;
 112         }
 113         if(type & IRCD_SELECT_WRITE) {
 114                 pe_update_events(F, POLLWRNORM, handler);
 115                 F->write_handler = handler;
 116                 F->write_data = client_data;
 117         }
 118 }
 119
 120 /*
 121  * ircd_select
 122  *
 123  * Called to do the new-style IO, courtesy of squid (like most of this
 124  * new IO code). This routine handles the stuff we've hidden in
 125  * ircd_setselect and fd_table[] and calls callbacks for IO ready
 126  * events.
 127  */
 128
 129 int
 130 ircd_select(unsigned long delay)
 131 {
 132         int              i, fd;
 133         uint             nget = 1;
 134         struct  timespec         poll_time;
 135         struct  timer_data      *tdata;
 136
 137         poll_time.tv_sec = delay / 1000;
 138         poll_time.tv_nsec = (delay % 1000) * 1000000;
 139
 140         i = port_getn(pe, pelst, pemax, &nget, &poll_time);
 141         ircd_set_time();
 142
 143         if (i == -1)
 144                 return COMM_ERROR;
 145
 146         for (i = 0; i < nget; i++) {
 147                 switch(pelst[i].portev_source) {
 148                 case PORT_SOURCE_FD:
 149                         fd = pelst[i].portev_object;
 150                         PF *hdl = NULL;
 151                         fde_t *F = &fd_table[fd];
 152
 153                         if ((pelst[i].portev_events & POLLRDNORM) && (hdl = F->read_handler)) {
 154                                 F->read_handler = NULL;
 155                                 hdl(fd, F->read_data);
 156                         }
 157                         if ((pelst[i].portev_events & POLLWRNORM) && (hdl = F->write_handler)) {
 158                                 F->write_handler = NULL;
 159                                 hdl(fd, F->write_data);
 160                         }
 161                         break;
 162
 163                 case PORT_SOURCE_TIMER:
 164                         tdata = pelst[i].portev_user;
 165                         tdata->td_cb(tdata->td_udata);
 166
 167                         if (!tdata->td_repeat)
 168                                 free(tdata);
 169
 170                         break;
 171                 }
 172         }
 173         return COMM_OK;
 174 }