1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | * |
6 | * |
7 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
7 | * Crossfire TRT is free software: you can redistribute it and/or modify |
8 | * under the terms of the GNU General Public License as published by the Free |
8 | * it under the terms of the GNU General Public License as published by |
9 | * Software Foundation; either version 2 of the License, or (at your option) |
9 | * the Free Software Foundation, either version 3 of the License, or |
10 | * any later version. |
10 | * (at your option) any later version. |
11 | * |
11 | * |
12 | * This program is distributed in the hope that it will be useful, but |
12 | * This program is distributed in the hope that it will be useful, |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * for more details. |
15 | * GNU General Public License for more details. |
16 | * |
16 | * |
17 | * You should have received a copy of the GNU General Public License along |
17 | * You should have received a copy of the GNU General Public License |
18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | * |
19 | * |
21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
20 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
21 | */ |
23 | |
22 | |
24 | /** |
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25 | * \file |
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26 | * Low-level socket-related functions. |
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27 | * |
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28 | * \date 2003-12-02 |
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29 | * |
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30 | * Contains some base functions that both the client and server |
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31 | * can use. As such, depending what we are being compiled for will |
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32 | * determine what we can include. the client is designed have |
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33 | * CFCLIENT defined as part of its compile flags. |
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34 | */ |
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35 | |
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36 | using namespace std; |
23 | using namespace std; |
37 | |
24 | |
38 | #include <global.h> |
25 | #include <global.h> |
39 | #include <sproto.h> |
26 | #include <sproto.h> |
40 | #include <cstdarg> |
27 | #include <cstdarg> |
41 | |
28 | |
42 | #ifdef __linux__ |
29 | #if HAVE_TCP_INFO |
43 | # include <sys/types.h> |
30 | # include <sys/types.h> |
44 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
45 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
46 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
47 | #endif |
34 | #endif |
48 | |
35 | |
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36 | #define HAVE_SIOCOUTQ 1 //TODO configure.ac support |
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37 | #if HAVE_SIOCOUTQ |
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38 | # include <linux/sockios.h> |
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39 | #endif |
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40 | |
49 | // disconnect a socket after this many seconds without an ack |
41 | // disconnect a socket after this many seconds without an ack |
50 | #define SOCKET_TIMEOUT 8. |
42 | #define SOCKET_TIMEOUT 8. |
51 | |
43 | |
52 | // force a packet when idle for more than this many seconds, |
44 | // force a packet when idle for more than this many seconds, |
53 | // forcing an ack regularly. |
45 | // forcing an ack regularly. |
… | |
… | |
57 | client::flush () |
49 | client::flush () |
58 | { |
50 | { |
59 | if (destroyed ()) |
51 | if (destroyed ()) |
60 | return; |
52 | return; |
61 | |
53 | |
62 | #ifdef __linux__ //TODO: this is available on bsds, too, use a configure test. |
54 | # if HAVE_SIOCOUTQ |
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55 | { |
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56 | int value; |
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57 | |
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58 | if (!ioctl (fd, SIOCOUTQ, &value)) |
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59 | outq = value; |
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60 | } |
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61 | # endif |
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62 | |
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63 | #if HAVE_TCP_INFO |
63 | // check about once per second, spread evenly over all clients |
64 | // check about once per second, spread evenly over all clients |
64 | if (!((pticks + fd) & 7)) |
65 | // do this only when player is active |
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66 | if (!((pticks + fd) & 7) && pl && pl->active) |
65 | { |
67 | { |
66 | // check time of last ack, and, if too old, kill connection |
68 | // check time of last ack, and, if too old, kill connection |
67 | struct tcp_info tcpi; |
69 | struct tcp_info tcpi; |
68 | socklen_t len = sizeof (tcpi); |
70 | socklen_t len = sizeof (tcpi); |
69 | |
71 | |
70 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
72 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
71 | { |
73 | { |
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74 | if (tcpi.tcpi_snd_mss) |
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75 | mss = tcpi.tcpi_snd_mss; |
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76 | |
72 | rtt = tcpi.tcpi_rtt; |
77 | rtt = tcpi.tcpi_rtt; |
73 | rttvar = tcpi.tcpi_rttvar; |
78 | rttvar = tcpi.tcpi_rttvar; |
74 | |
79 | |
75 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
80 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
76 | { |
81 | { |
… | |
… | |
93 | */ |
98 | */ |
94 | |
99 | |
95 | // write a nop to the socket at least every IDLE_NOP seconds. |
100 | // write a nop to the socket at least every IDLE_NOP seconds. |
96 | if (!outputbuffer.len) |
101 | if (!outputbuffer.len) |
97 | { |
102 | { |
98 | if (last_send + IDLE_PING <= NOW) |
103 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
99 | { |
104 | { |
100 | // this is a bit ugly, but map1/map1a seem to be the only |
105 | // this is a bit ugly, but map1/map1a seem to be the only |
101 | // nop'able commands and they are quite small. |
106 | // nop'able commands and they are quite small. |
102 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
107 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
103 | send_packet (sl); |
108 | send_packet (sl); |
… | |
… | |
519 | va_end (ap); |
524 | va_end (ap); |
520 | |
525 | |
521 | send_packet (sl); |
526 | send_packet (sl); |
522 | } |
527 | } |
523 | |
528 | |
524 | void |
529 | // returns true when the message needs special (read: perl) treatment |
525 | client::send_drawinfo (const char *msg, int flags) |
530 | static bool |
526 | { |
531 | msg_is_special (const char *msg) |
527 | send_packet_printf ("drawinfo %d %s", flags, msg); |
532 | { |
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533 | return msg [strcspn (msg, "<[&\n")]; |
528 | } |
534 | } |
529 | |
535 | |
530 | void |
536 | void |
531 | client::send_msg (int color, const char *type, const char *msg) |
537 | client::send_msg (int color, const char *type, const char *msg) |
532 | { |
538 | { |
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539 | if (msg_is_special (msg)) |
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540 | cfperl_send_msg (this, color, type, msg); |
533 | if (can_msg) |
541 | else if (can_msg) |
534 | send_packet_printf ("msg %d %s %s", color, type, msg); |
542 | send_packet_printf ("msg %d %s %s", color, type, msg); |
535 | else if (color < 0) |
543 | else if (color < 0) |
536 | return; // client cannot handle this |
544 | return; // client cannot handle this |
537 | else if (strchr (msg, '<') || strchr (msg, '&')) |
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538 | { |
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539 | //TODO: should escape/modify to old syntax |
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540 | send_packet_printf ("drawinfo %d %s", color, msg); |
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541 | } |
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542 | else |
545 | else |
543 | send_packet_printf ("drawinfo %d %s", color, msg); |
546 | send_packet_printf ("drawinfo %d %s", color, msg); |
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547 | } |
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548 | |
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549 | void |
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550 | client::send_drawinfo (const char *msg, int flags) |
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551 | { |
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552 | send_msg (flags, "log", msg); |
544 | } |
553 | } |
545 | |
554 | |
546 | /*********************************************************************** |
555 | /*********************************************************************** |
547 | * |
556 | * |
548 | * packet functions/utilities |
557 | * packet functions/utilities |