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31 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
32 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
33 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
34 | #endif |
34 | #endif |
35 | |
35 | |
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 | |
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41 | // disconnect a socket after this many seconds without an ack |
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42 | #define SOCKET_TIMEOUT 8. |
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43 | |
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44 | // force a packet when idle for more than this many seconds, |
36 | // force a packet when idle for more than this many seconds, |
45 | // forcing an ack regularly. |
37 | // forcing an ack regularly. |
46 | #define IDLE_PING 2. |
38 | #define IDLE_PING 2. |
47 | |
39 | |
48 | void |
40 | void |
49 | client::flush () |
41 | client::flush () |
50 | { |
42 | { |
51 | if (destroyed ()) |
43 | if (destroyed ()) |
52 | return; |
44 | return; |
53 | |
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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 |
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64 | // check about once per second, spread evenly over all clients |
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65 | // do this only when player is active |
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66 | if (!((pticks + fd) & 7) && pl && pl->active) |
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67 | { |
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68 | // check time of last ack, and, if too old, kill connection |
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69 | struct tcp_info tcpi; |
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70 | socklen_t len = sizeof (tcpi); |
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71 | |
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72 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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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 | |
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77 | rtt = tcpi.tcpi_rtt; |
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78 | rttvar = tcpi.tcpi_rttvar; |
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79 | |
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80 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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81 | { |
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82 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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83 | write_outputbuffer (); |
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84 | |
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85 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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86 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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87 | destroy (); |
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88 | } |
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89 | } |
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90 | } |
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91 | #endif |
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92 | |
45 | |
93 | /** |
46 | /** |
94 | * Writes data to socket. |
47 | * Writes data to socket. |
95 | * |
48 | * |
96 | * When the socket is clear to write, and we have backlogged data, this |
49 | * When the socket is clear to write, and we have backlogged data, this |
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179 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
180 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
181 | |
134 | |
182 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
183 | { |
136 | { |
184 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); |
137 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
185 | destroy (); |
138 | destroy (); |
186 | return -1; |
139 | return -1; |
187 | } |
140 | } |
188 | } |
141 | } |
189 | |
142 | |
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283 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
236 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
284 | else |
237 | else |
285 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
238 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
286 | } |
239 | } |
287 | else |
240 | else |
288 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
241 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
289 | } |
242 | } |
290 | |
243 | |
291 | bool |
244 | bool |
292 | client::handle_packet () |
245 | client::handle_packet () |
293 | { |
246 | { |
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334 | |
287 | |
335 | goto next_packet; |
288 | goto next_packet; |
336 | } |
289 | } |
337 | |
290 | |
338 | // If we get here, we didn't find a valid command. |
291 | // If we get here, we didn't find a valid command. |
339 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
292 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
340 | next_packet: |
293 | next_packet: |
341 | skip_packet (pkt_len); |
294 | skip_packet (pkt_len); |
342 | |
295 | |
343 | // input buffer has space again |
296 | // input buffer has space again |
344 | socket_ev.poll (socket_ev.poll () | PE_R); |
297 | socket_ev.poll (socket_ev.poll () | PE_R); |
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476 | client::send_packet (packet &sl) |
429 | client::send_packet (packet &sl) |
477 | { |
430 | { |
478 | if (destroyed ()) |
431 | if (destroyed ()) |
479 | return; |
432 | return; |
480 | |
433 | |
481 | if (sl.length () >= MAXSOCKBUF) |
434 | if (sl.length () > MAXSOCKBUF) |
482 | { |
435 | { |
483 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
436 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
484 | /* Almost certainly we've overflowed a buffer, so quit now to make |
437 | /* Almost certainly we've overflowed a buffer, so quit now to make |
485 | * it easier to debug. |
438 | * it easier to debug. |
486 | */ |
439 | */ |
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534 | } |
487 | } |
535 | |
488 | |
536 | void |
489 | void |
537 | client::send_msg (int color, const char *type, const char *msg) |
490 | client::send_msg (int color, const char *type, const char *msg) |
538 | { |
491 | { |
539 | if (msg_is_special (msg)) |
492 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
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493 | { |
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494 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
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495 | return; |
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496 | } |
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497 | |
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498 | int len = strlen (msg); |
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499 | |
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500 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) |
540 | cfperl_send_msg (this, color, type, msg); |
501 | cfperl_send_msg (this, color, type, msg); |
541 | else if (can_msg) |
502 | else if (can_msg) |
542 | send_packet_printf ("msg %d %s %s", color, type, msg); |
503 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
543 | else if (color < 0) |
504 | else if (color < 0) |
544 | return; // client cannot handle this |
505 | return; // client cannot handle this |
545 | else |
506 | else |
546 | send_packet_printf ("drawinfo %d %s", color, msg); |
507 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
547 | } |
508 | } |
548 | |
509 | |
549 | void |
510 | void |
550 | client::send_drawinfo (const char *msg, int flags) |
511 | client::send_drawinfo (const char *msg, int flags) |
551 | { |
512 | { |