| 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 | * |
| 21 | * The author can be reached via e-mail to mark@pyramid.com |
7 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
| 22 | */ |
8 | * under the terms of the GNU General Public License as published by the Free |
| 23 | |
9 | * Software Foundation; either version 2 of the License, or (at your option) |
| 24 | /** |
10 | * any later version. |
| 25 | * \file |
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| 26 | * Low-level socket-related functions. |
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| 27 | * |
11 | * |
| 28 | * \date 2003-12-02 |
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. |
| 29 | * |
16 | * |
| 30 | * Contains some base functions that both the client and server |
17 | * You should have received a copy of the GNU General Public License along |
| 31 | * can use. As such, depending what we are being compiled for will |
18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
| 32 | * determine what we can include. the client is designed have |
19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 33 | * CFCLIENT defined as part of its compile flags. |
20 | * |
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21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
| 34 | */ |
22 | */ |
| 35 | |
23 | |
| 36 | using namespace std; |
24 | using namespace std; |
| 37 | |
25 | |
| 38 | #include <global.h> |
26 | #include <global.h> |
| 39 | #include <sproto.h> |
27 | #include <sproto.h> |
| 40 | #include <cstdarg> |
28 | #include <cstdarg> |
| 41 | |
29 | |
| 42 | #ifdef __linux__ |
30 | #if HAVE_TCP_INFO |
| 43 | # include <sys/types.h> |
31 | # include <sys/types.h> |
| 44 | # include <sys/socket.h> |
32 | # include <sys/socket.h> |
| 45 | # include <netinet/in.h> |
33 | # include <netinet/in.h> |
| 46 | # include <netinet/tcp.h> |
34 | # include <netinet/tcp.h> |
| 47 | #endif |
35 | #endif |
| 48 | |
36 | |
| 49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
37 | // 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 |
38 | #define SOCKET_TIMEOUT 8. |
| 52 | #define SOCKET_TIMEOUT2 20 * 1000 |
39 | |
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40 | // force a packet when idle for more than this many seconds, |
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41 | // forcing an ack regularly. |
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42 | #define IDLE_PING 2. |
| 53 | |
43 | |
| 54 | void |
44 | void |
| 55 | client::flush () |
45 | client::flush () |
| 56 | { |
46 | { |
| 57 | if (destroyed ()) |
47 | if (destroyed ()) |
| 58 | return; |
48 | return; |
| 59 | |
49 | |
| 60 | #ifdef __linux__ |
50 | #if HAVE_TCP_INFO |
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51 | // check about once per second, spread evenly over all clients |
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52 | if (!((pticks + fd) & 7)) |
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53 | { |
| 61 | // check time of last ack, and, if too old, kill connection |
54 | // check time of last ack, and, if too old, kill connection |
| 62 | struct tcp_info tcpi; |
55 | struct tcp_info tcpi; |
| 63 | socklen_t len = sizeof (tcpi); |
56 | socklen_t len = sizeof (tcpi); |
| 64 | |
57 | |
| 65 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
58 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
| 66 | { |
59 | { |
| 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; |
60 | rtt = tcpi.tcpi_rtt; |
| 70 | rttvar = tcpi.tcpi_rttvar; |
61 | rttvar = tcpi.tcpi_rttvar; |
| 71 | |
62 | |
| 72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
63 | 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 | { |
64 | { |
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65 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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66 | write_outputbuffer (); |
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67 | |
| 75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
68 | 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); |
69 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
| 77 | destroy (); |
70 | destroy (); |
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71 | } |
| 78 | } |
72 | } |
| 79 | } |
73 | } |
| 80 | #endif |
74 | #endif |
| 81 | |
75 | |
| 82 | /** |
76 | /** |
| … | |
… | |
| 84 | * |
78 | * |
| 85 | * When the socket is clear to write, and we have backlogged data, this |
79 | * When the socket is clear to write, and we have backlogged data, this |
| 86 | * is called to write it out. |
80 | * is called to write it out. |
| 87 | */ |
81 | */ |
| 88 | |
82 | |
| 89 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
83 | // write a nop to the socket at least every IDLE_NOP seconds. |
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84 | if (!outputbuffer.len) |
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85 | { |
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86 | if (last_send + IDLE_PING <= NOW) |
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87 | { |
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88 | // this is a bit ugly, but map1/map1a seem to be the only |
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89 | // nop'able commands and they are quite small. |
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90 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
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91 | send_packet (sl); |
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92 | } |
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93 | else |
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94 | return; |
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95 | } |
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96 | |
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97 | if (socket_ev.poll () & PE_W) |
| 90 | return; |
98 | return; |
| 91 | |
99 | |
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100 | last_send = NOW; |
| 92 | write_outputbuffer (); |
101 | write_outputbuffer (); |
| 93 | } |
102 | } |
| 94 | |
103 | |
| 95 | void |
104 | void |
| 96 | client::write_outputbuffer () |
105 | client::write_outputbuffer () |
| … | |
… | |
| 106 | /* wrap back to start of buffer */ |
115 | /* wrap back to start of buffer */ |
| 107 | if (outputbuffer.start == SOCKETBUFSIZE) |
116 | if (outputbuffer.start == SOCKETBUFSIZE) |
| 108 | outputbuffer.start = 0; |
117 | outputbuffer.start = 0; |
| 109 | |
118 | |
| 110 | outputbuffer.len -= res; |
119 | 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 | } |
120 | } |
| 116 | else if (res == 0) |
121 | else if (res == 0) |
| 117 | { |
122 | { |
| 118 | LOG (llevError, "socket write failed, connection closed.\n"); |
123 | LOG (llevError, "socket write failed, connection closed.\n"); |
| 119 | destroy (); |
124 | destroy (); |
| … | |
… | |
| 190 | static struct packet_type packets[] = { |
195 | static struct packet_type packets[] = { |
| 191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
196 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
| 192 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
197 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
| 193 | |
198 | |
| 194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
199 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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200 | {"ex", PC(ExCmd) PF_PLAYING }, |
| 195 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
201 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
| 196 | {"lookat", PC(LookAt) PF_PLAYING }, |
202 | {"lookat", PC(LookAt) PF_PLAYING }, |
| 197 | {"lock", PC(LockItem) PF_PLAYING }, |
203 | {"lock", PC(LockItem) PF_PLAYING }, |
| 198 | {"mark", PC(MarkItem) PF_PLAYING }, |
204 | {"mark", PC(MarkItem) PF_PLAYING }, |
| 199 | {"move", PC(MoveCmd) PF_PLAYING }, |
205 | {"move", PC(MoveCmd) PF_PLAYING }, |
| 200 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
206 | {"ext", PC(ExtCmd) 0 }, // CF+ |
| 201 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
207 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
| 202 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
208 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
| 203 | |
209 | |
| 204 | {"reply", SC(ReplyCmd) 0 }, |
210 | {"reply", SC(ReplyCmd) 0 }, |
| 205 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
211 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
| 206 | {"addme", SC(AddMeCmd) 0 }, |
212 | {"addme", SC(AddMeCmd) 0 }, |
| 207 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
213 | {"askface", SC(AskFaceCmd) 0 }, |
| 208 | {"requestinfo", SC(RequestInfo) 0 }, |
214 | {"requestinfo", SC(RequestInfo) 0 }, |
| 209 | {"setfacemode", SC(SetFaceMode) 0 }, |
215 | {"setfacemode", SC(SetFaceMode) 0 }, |
| 210 | {"setsound", SC(SetSound) 0 }, |
216 | {"setsound", SC(SetSound) 0 }, |
| 211 | {"setup", SC(SetUp) 0 }, |
217 | {"setup", SC(SetUp) 0 }, |
| 212 | {"version", SC(VersionCmd) 0 }, |
218 | {"version", SC(VersionCmd) 0 }, |
| … | |
… | |
| 375 | } |
381 | } |
| 376 | else |
382 | else |
| 377 | { |
383 | { |
| 378 | inbuf_len += amount; |
384 | inbuf_len += amount; |
| 379 | |
385 | |
| 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 (); |
386 | cmd_ev.start (); |
| 384 | } |
387 | } |
| 385 | } |
388 | } |
| 386 | } |
389 | } |
| 387 | |
390 | |
| … | |
… | |
| 416 | return; |
419 | return; |
| 417 | |
420 | |
| 418 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
421 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
| 419 | { |
422 | { |
| 420 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
423 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
| 421 | destroy (); |
424 | // shutdown the socket, this is safer than destroying it immediately |
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425 | // as lots of code in the callchain might still access the map etc. |
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426 | shutdown (fd, SHUT_RDWR); |
| 422 | return; |
427 | return; |
| 423 | } |
428 | } |
| 424 | |
429 | |
| 425 | int avail, end; |
430 | int avail, end; |
| 426 | |
431 | |
| … | |
… | |
| 502 | va_end (ap); |
507 | va_end (ap); |
| 503 | |
508 | |
| 504 | send_packet (sl); |
509 | send_packet (sl); |
| 505 | } |
510 | } |
| 506 | |
511 | |
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512 | void |
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513 | client::send_drawinfo (const char *msg, int flags) |
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514 | { |
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515 | send_packet_printf ("drawinfo %d %s", flags, msg); |
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516 | } |
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517 | |
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518 | void |
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519 | client::send_msg (int color, const char *type, const char *msg) |
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520 | { |
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521 | if (can_msg) |
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522 | send_packet_printf ("msg %d %s %s", color, type, msg); |
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523 | else if (color < 0) |
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524 | return; // client cannot handle this |
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525 | else if (strchr (msg, '<') || strchr (msg, '&')) |
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526 | { |
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527 | //TODO: should escape/modify to old syntax |
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528 | send_packet_printf ("drawinfo %d %s", color, msg); |
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529 | } |
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530 | else |
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531 | send_packet_printf ("drawinfo %d %s", color, msg); |
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532 | } |
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533 | |
| 507 | /*********************************************************************** |
534 | /*********************************************************************** |
| 508 | * |
535 | * |
| 509 | * packet functions/utilities |
536 | * packet functions/utilities |
| 510 | * |
537 | * |
| 511 | **********************************************************************/ |
538 | **********************************************************************/ |
| … | |
… | |
| 517 | int len = strlen (name); |
544 | int len = strlen (name); |
| 518 | memcpy (cur, name, len); cur += len; |
545 | memcpy (cur, name, len); cur += len; |
| 519 | *cur++ = ' '; |
546 | *cur++ = ' '; |
| 520 | } |
547 | } |
| 521 | |
548 | |
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549 | packet &packet::operator <<(const ber32 v) |
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550 | { |
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551 | enum { maxlen = 32 / 7 + 1}; |
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552 | uint8 buf[maxlen]; |
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553 | uint8 *p = buf + maxlen; |
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554 | uint32 val = v.val; |
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555 | |
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556 | *--p = val & 0x7F; |
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557 | |
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558 | while (val > 0x7F) |
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559 | { |
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560 | val >>= 7; |
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561 | *--p = (val & 0x7F) | 0x80; |
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562 | } |
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563 | |
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564 | return *this << data (p, buf + maxlen - p); |
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565 | } |
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566 | |
| 522 | packet &packet::operator <<(const data &v) |
567 | packet &packet::operator <<(const data &v) |
| 523 | { |
568 | { |
| 524 | if (room () < v.len) |
569 | if (room () < v.len) |
| 525 | reset (); |
570 | reset (); |
| 526 | else |
571 | else |
| … | |
… | |
| 563 | return reset (); |
608 | return reset (); |
| 564 | |
609 | |
| 565 | cur += len; |
610 | cur += len; |
| 566 | } |
611 | } |
| 567 | |
612 | |
| 568 | /****************************************************************************** |
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| 569 | * |
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| 570 | * statistics logging functions. |
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| 571 | * |
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| 572 | ******************************************************************************/ |
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| 573 | |
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| 574 | #ifdef CS_LOGSTATS |
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| 575 | |
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| 576 | /* cst_tot is for the life of the server, cst_last is for the last series of |
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| 577 | * stats |
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| 578 | */ |
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| 579 | CS_Stats cst_tot, cst_lst; |
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| 580 | |
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| 581 | /** |
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| 582 | * Writes out the gathered stats. We clear cst_lst. |
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| 583 | */ |
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| 584 | void |
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| 585 | write_cs_stats (void) |
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| 586 | { |
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| 587 | time_t now = time (NULL); |
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| 588 | |
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| 589 | /* If no connections recently, don't both to log anything */ |
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| 590 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
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| 591 | return; |
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| 592 | |
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| 593 | /* CSSTAT is put in so scripts can easily find the line */ |
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| 594 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
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| 595 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
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| 596 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
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| 597 | cst_lst.ibytes = 0; |
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| 598 | cst_lst.obytes = 0; |
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| 599 | cst_lst.time_start = now; |
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| 600 | } |
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| 601 | #endif |
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| 602 | |
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