2000-04-26 04:03:38 -04:00
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/*
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net-disconnect.c :
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Copyright (C) 1999-2000 Timo Sirainen
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "module.h"
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#include "network.h"
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/* when quitting, wait for max. 5 seconds before forcing to close the socket */
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#define MAX_QUIT_CLOSE_WAIT 5
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/* wait for max. 2 minutes for other side to close the socket */
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#define MAX_CLOSE_WAIT (60*2)
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typedef struct {
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time_t created;
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2000-12-04 17:57:18 -05:00
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GIOChannel *handle;
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2000-04-26 04:03:38 -04:00
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int tag;
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} NET_DISCONNECT_REC;
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static GSList *disconnects;
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static int timeout_tag;
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static void net_disconnect_remove(NET_DISCONNECT_REC *rec)
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{
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disconnects = g_slist_remove(disconnects, rec);
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g_source_remove(rec->tag);
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g_free(rec);
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}
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static void sig_disconnect(NET_DISCONNECT_REC *rec)
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{
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char buf[128];
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int ret;
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/* check if there's any data waiting in socket */
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while ((ret = net_receive(rec->handle, buf, sizeof(buf))) > 0) ;
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2000-04-26 04:03:38 -04:00
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if (ret == -1) {
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/* socket was closed */
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net_disconnect_remove(rec);
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}
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}
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static int sig_timeout_disconnect(void)
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{
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NET_DISCONNECT_REC *rec;
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GSList *tmp, *next;
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time_t now;
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/* check if we've waited enough for sockets to close themselves */
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now = time(NULL);
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for (tmp = disconnects; tmp != NULL; tmp = next) {
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rec = tmp->data;
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next = tmp->next;
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if (rec->created+MAX_CLOSE_WAIT <= now)
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net_disconnect_remove(rec);
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}
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if (disconnects == NULL) {
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/* no more sockets in disconnect queue, stop calling this
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function */
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timeout_tag = -1;
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}
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return disconnects != NULL;
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}
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/* Try to let the other side close the connection, if it still isn't
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disconnected after certain amount of time, close it ourself */
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void net_disconnect_later(GIOChannel *handle)
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{
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NET_DISCONNECT_REC *rec;
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rec = g_new(NET_DISCONNECT_REC, 1);
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rec->created = time(NULL);
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rec->handle = handle;
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rec->tag = g_input_add(handle, G_INPUT_READ,
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(GInputFunction) sig_disconnect, rec);
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if (timeout_tag == -1) {
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timeout_tag = g_timeout_add(10000, (GSourceFunc)
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sig_timeout_disconnect, NULL);
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}
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disconnects = g_slist_append(disconnects, rec);
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}
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void net_disconnect_init(void)
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{
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disconnects = NULL;
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timeout_tag = -1;
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}
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void net_disconnect_deinit(void)
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{
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#ifndef WIN32
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NET_DISCONNECT_REC *rec;
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time_t now, max;
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int first, fd;
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struct timeval tv;
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fd_set set;
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/* give the sockets a chance to disconnect themselves.. */
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max = time(NULL)+MAX_QUIT_CLOSE_WAIT;
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first = 1;
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while (disconnects != NULL) {
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rec = disconnects->data;
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now = time(NULL);
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if (rec->created+MAX_QUIT_CLOSE_WAIT <= now || max <= now) {
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/* this one has waited enough */
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net_disconnect_remove(rec);
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continue;
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}
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2000-12-04 17:57:18 -05:00
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fd = g_io_channel_unix_get_fd(rec->handle);
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FD_ZERO(&set);
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FD_SET(fd, &set);
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tv.tv_sec = first ? 0 : max-now;
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tv.tv_usec = first ? 100000 : 0;
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if (select(fd+1, &set, NULL, NULL, &tv) > 0 &&
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FD_ISSET(fd, &set)) {
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/* data coming .. check if we can close the handle */
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sig_disconnect(rec);
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} else if (first) {
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/* Display the text when we have already waited
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for a while */
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printf(_("Please wait, waiting for servers to close "
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"connections..\n"));
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fflush(stdout);
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first = 0;
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}
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}
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2000-10-26 14:57:23 -04:00
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#endif
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2000-04-26 04:03:38 -04:00
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}
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