2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * recvclient.c: Receive input from the client
30 * Known contributors to this file:
32 * Markus Armbruster, 2006-2008
40 #include "prototypes.h"
43 * Receive a line of input from the current player.
44 * If the player's eof flag is set, return -1 without receiving input.
45 * If the player's aborted flag is set, return -2 without receiving
47 * Else receive one line and store it in CMD[SIZE].
48 * This may block for input, yielding the processor. Flush buffered
49 * output when blocking, to make sure player sees the prompt.
50 * If the player's connection has the I/O error or EOF indicator set,
51 * or the line is "ctld", set the player's eof and aborted flag and
53 * If the line is "aborted", set the player's aborted flag and return
55 * Else return the length of the line.
56 * Design bug: there is no way to indicate truncation of a long line.
59 recvclient(char *cmd, int size)
64 while (!player->aborted) {
65 /* Try to get a line of input */
66 count = io_gets(player->iop, cmd, size);
69 if (strcmp(cmd, "ctld") == 0)
70 player->aborted = player->eof = 1;
71 if (strcmp(cmd, "aborted") == 0)
77 /* Make sure player sees prompt */
78 io_output_all(player->iop);
81 * If io_output_all() blocked and got unblocked by command
82 * abortion, we must return without blocking in io_input().
87 if (io_input(player->iop, IO_WAIT) <= 0) {
88 if (!io_error(player->iop) && !io_eof(player->iop)) {
89 pr_flash(player, "idle connection terminated\n");
90 player->state = PS_SHUTDOWN;
92 player->aborted = player->eof = 1;
96 if (player->aborted) {
98 if (player->recvfail > 255) {
100 * Looks like the thread is stuck in a loop that fails to
101 * check errors; oops once, then slow it down drastically.
103 CANT_HAPPEN(player->recvfail == 256);
104 empth_sleep(time(NULL) + 60);
106 return player->eof ? -1 : -2;
109 player->recvfail = 0;