1 | /* |
1 | /* |
2 | * CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
3 | * |
3 | * |
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
5 | * Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | * |
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7 | * This program is free software; you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation; either version 2 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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20 | * |
6 | * |
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7 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
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8 | * under the terms of the GNU General Public License as published by the Free |
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9 | * Software Foundation; either version 2 of the License, or (at your option) |
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10 | * any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, but |
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13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 | * for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License along |
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18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
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19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | * |
21 | * The author can be reached via e-mail to mark@pyramid.com |
21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
22 | */ |
23 | |
23 | |
24 | /** |
24 | /** |
25 | * \file |
25 | * \file |
26 | * Low-level socket-related functions. |
26 | * Low-level socket-related functions. |
27 | * |
27 | * |
28 | * \date 2003-12-02 |
28 | * \date 2003-12-02 |
… | |
… | |
44 | # include <sys/socket.h> |
44 | # include <sys/socket.h> |
45 | # include <netinet/in.h> |
45 | # include <netinet/in.h> |
46 | # include <netinet/tcp.h> |
46 | # include <netinet/tcp.h> |
47 | #endif |
47 | #endif |
48 | |
48 | |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
49 | // disconnect a socket after this many seconds without an ack |
50 | // easily die in 20 seconds... |
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51 | #define SOCKET_TIMEOUT1 10 * 1000 |
50 | #define SOCKET_TIMEOUT 8. |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
51 | |
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52 | // force a packet when idle for more than this many seconds, |
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53 | // forcing an ack regularly. |
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54 | #define IDLE_PING 2. |
53 | |
55 | |
54 | void |
56 | void |
55 | client::flush () |
57 | client::flush () |
56 | { |
58 | { |
57 | if (destroyed ()) |
59 | if (destroyed ()) |
58 | return; |
60 | return; |
59 | |
61 | |
60 | #ifdef __linux__ |
62 | #ifdef __linux__ |
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63 | // check about once per second, spread evenly over all clients |
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64 | if (!((pticks + fd) & 7)) |
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65 | { |
61 | // check time of last ack, and, if too old, kill connection |
66 | // check time of last ack, and, if too old, kill connection |
62 | struct tcp_info tcpi; |
67 | struct tcp_info tcpi; |
63 | socklen_t len = sizeof (tcpi); |
68 | socklen_t len = sizeof (tcpi); |
64 | |
69 | |
65 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
70 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
66 | { |
71 | { |
67 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
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68 | |
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69 | rtt = tcpi.tcpi_rtt; |
72 | rtt = tcpi.tcpi_rtt; |
70 | rttvar = tcpi.tcpi_rttvar; |
73 | rttvar = tcpi.tcpi_rttvar; |
71 | |
74 | |
72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
75 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
73 | && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s |
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74 | { |
76 | { |
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77 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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78 | write_outputbuffer (); |
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79 | |
75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
80 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
76 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
81 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
77 | destroy (); |
82 | destroy (); |
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83 | } |
78 | } |
84 | } |
79 | } |
85 | } |
80 | #endif |
86 | #endif |
81 | |
87 | |
82 | /** |
88 | /** |
… | |
… | |
84 | * |
90 | * |
85 | * When the socket is clear to write, and we have backlogged data, this |
91 | * When the socket is clear to write, and we have backlogged data, this |
86 | * is called to write it out. |
92 | * is called to write it out. |
87 | */ |
93 | */ |
88 | |
94 | |
89 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
95 | // write a nop to the socket at least every IDLE_NOP seconds. |
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96 | if (!outputbuffer.len) |
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97 | { |
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98 | if (last_send + IDLE_PING <= NOW) |
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99 | { |
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100 | // this is a bit ugly, but map1/map1a seem to be the only |
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101 | // nop'able commands and they are quite small. |
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102 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
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103 | send_packet (sl); |
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104 | } |
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105 | else |
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106 | return; |
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107 | } |
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108 | |
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109 | if (socket_ev.poll () & PE_W) |
90 | return; |
110 | return; |
91 | |
111 | |
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112 | last_send = NOW; |
92 | write_outputbuffer (); |
113 | write_outputbuffer (); |
93 | } |
114 | } |
94 | |
115 | |
95 | void |
116 | void |
96 | client::write_outputbuffer () |
117 | client::write_outputbuffer () |
… | |
… | |
106 | /* wrap back to start of buffer */ |
127 | /* wrap back to start of buffer */ |
107 | if (outputbuffer.start == SOCKETBUFSIZE) |
128 | if (outputbuffer.start == SOCKETBUFSIZE) |
108 | outputbuffer.start = 0; |
129 | outputbuffer.start = 0; |
109 | |
130 | |
110 | outputbuffer.len -= res; |
131 | outputbuffer.len -= res; |
111 | #ifdef CS_LOGSTATS |
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112 | cst_tot.obytes += res; |
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113 | cst_lst.obytes += res; |
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114 | #endif |
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115 | } |
132 | } |
116 | else if (res == 0) |
133 | else if (res == 0) |
117 | { |
134 | { |
118 | LOG (llevError, "socket write failed, connection closed.\n"); |
135 | LOG (llevError, "socket write failed, connection closed.\n"); |
119 | destroy (); |
136 | destroy (); |
… | |
… | |
190 | static struct packet_type packets[] = { |
207 | static struct packet_type packets[] = { |
191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
208 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
192 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
209 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
193 | |
210 | |
194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
211 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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212 | {"ex", PC(ExCmd) PF_PLAYING }, |
195 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
213 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
196 | {"lookat", PC(LookAt) PF_PLAYING }, |
214 | {"lookat", PC(LookAt) PF_PLAYING }, |
197 | {"lock", PC(LockItem) PF_PLAYING }, |
215 | {"lock", PC(LockItem) PF_PLAYING }, |
198 | {"mark", PC(MarkItem) PF_PLAYING }, |
216 | {"mark", PC(MarkItem) PF_PLAYING }, |
199 | {"move", PC(MoveCmd) PF_PLAYING }, |
217 | {"move", PC(MoveCmd) PF_PLAYING }, |
200 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
218 | {"ext", PC(ExtCmd) 0 }, // CF+ |
201 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
219 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
202 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
220 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
203 | |
221 | |
204 | {"reply", SC(ReplyCmd) 0 }, |
222 | {"reply", SC(ReplyCmd) 0 }, |
205 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
223 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
206 | {"addme", SC(AddMeCmd) 0 }, |
224 | {"addme", SC(AddMeCmd) 0 }, |
207 | {"askface", SC(AskFaceCmd) 0 }, |
225 | {"askface", SC(AskFaceCmd) 0 }, |
208 | {"requestinfo", SC(RequestInfo) 0 }, |
226 | {"requestinfo", SC(RequestInfo) 0 }, |
209 | {"setfacemode", SC(SetFaceMode) 0 }, |
227 | {"setfacemode", SC(SetFaceMode) 0 }, |
210 | {"setsound", SC(SetSound) 0 }, |
228 | {"setsound", SC(SetSound) 0 }, |
… | |
… | |
375 | } |
393 | } |
376 | else |
394 | else |
377 | { |
395 | { |
378 | inbuf_len += amount; |
396 | inbuf_len += amount; |
379 | |
397 | |
380 | cst_tot.ibytes += amount; |
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381 | cst_lst.ibytes += amount; |
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382 | |
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383 | cmd_ev.start (); |
398 | cmd_ev.start (); |
384 | } |
399 | } |
385 | } |
400 | } |
386 | } |
401 | } |
387 | |
402 | |
… | |
… | |
510 | client::send_drawinfo (const char *msg, int flags) |
525 | client::send_drawinfo (const char *msg, int flags) |
511 | { |
526 | { |
512 | send_packet_printf ("drawinfo %d %s", flags, msg); |
527 | send_packet_printf ("drawinfo %d %s", flags, msg); |
513 | } |
528 | } |
514 | |
529 | |
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530 | void |
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531 | client::send_msg (int color, const char *type, const char *msg) |
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532 | { |
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533 | if (can_msg) |
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534 | send_packet_printf ("msg %d %s %s", color, type, msg); |
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535 | else if (color < 0) |
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536 | return; // client cannot handle this |
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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 |
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543 | send_packet_printf ("drawinfo %d %s", color, msg); |
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544 | } |
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545 | |
515 | /*********************************************************************** |
546 | /*********************************************************************** |
516 | * |
547 | * |
517 | * packet functions/utilities |
548 | * packet functions/utilities |
518 | * |
549 | * |
519 | **********************************************************************/ |
550 | **********************************************************************/ |
… | |
… | |
589 | return reset (); |
620 | return reset (); |
590 | |
621 | |
591 | cur += len; |
622 | cur += len; |
592 | } |
623 | } |
593 | |
624 | |
594 | /****************************************************************************** |
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595 | * |
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596 | * statistics logging functions. |
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597 | * |
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598 | ******************************************************************************/ |
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599 | |
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600 | #ifdef CS_LOGSTATS |
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601 | |
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602 | /* cst_tot is for the life of the server, cst_last is for the last series of |
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603 | * stats |
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604 | */ |
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605 | CS_Stats cst_tot, cst_lst; |
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606 | |
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607 | /** |
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608 | * Writes out the gathered stats. We clear cst_lst. |
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609 | */ |
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610 | void |
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611 | write_cs_stats (void) |
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612 | { |
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613 | time_t now = time (NULL); |
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614 | |
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615 | /* If no connections recently, don't both to log anything */ |
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616 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
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617 | return; |
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618 | |
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619 | /* CSSTAT is put in so scripts can easily find the line */ |
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620 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
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621 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
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622 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
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623 | cst_lst.ibytes = 0; |
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624 | cst_lst.obytes = 0; |
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625 | cst_lst.time_start = now; |
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626 | } |
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627 | #endif |
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628 | |
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