1 | /* |
1 | /* |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | * the terms of the Affero GNU General Public License as published by the |
7 | * the terms of the Affero GNU General Public License as published by the |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * option) any later version. |
9 | * option) any later version. |
… | |
… | |
48 | * |
48 | * |
49 | * 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 |
50 | * is called to write it out. |
50 | * is called to write it out. |
51 | */ |
51 | */ |
52 | |
52 | |
53 | // write a nop to the socket at least every IDLE_NOP seconds. |
53 | // write a nop to the socket at least every IDLE_PING seconds. |
54 | if (!outputbuffer.len) |
54 | if (!outputbuffer.len) |
55 | { |
55 | { |
56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
57 | { |
57 | { |
58 | // this is a bit ugly, but map1a seems to be the only |
58 | // this is a bit ugly, but map1a seems to be the only |
… | |
… | |
132 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
133 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
134 | |
134 | |
135 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
136 | { |
136 | { |
137 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
137 | send_packet_printf ("msg %d log input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
138 | destroy (); |
138 | destroy (); |
139 | return -1; |
139 | return -1; |
140 | } |
140 | } |
141 | } |
141 | } |
142 | |
142 | |
… | |
… | |
167 | |
167 | |
168 | /** |
168 | /** |
169 | * Dispatch table for the server. |
169 | * Dispatch table for the server. |
170 | */ |
170 | */ |
171 | static struct packet_type packets[] = { |
171 | static struct packet_type packets[] = { |
172 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
|
|
173 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
172 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND }, |
174 | |
173 | |
175 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
174 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
176 | {"ex", PC(ExCmd) PF_PLAYING }, |
175 | {"ex", PC(ExCmd) PF_PLAYING }, |
177 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
176 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
178 | {"lookat", PC(LookAt) PF_PLAYING }, |
177 | {"lookat", PC(LookAt) PF_PLAYING }, |
… | |
… | |
200 | { |
199 | { |
201 | return (!(pkt->flags & PF_PLAYER) || pl) |
200 | return (!(pkt->flags & PF_PLAYER) || pl) |
202 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
201 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
203 | } |
202 | } |
204 | |
203 | |
205 | // HACK: some commands currently should be executed |
204 | // HACK: some commands currently should be executed |
206 | // even when the player is frozen. this hack detects |
205 | // even when the player is frozen. this hack detects |
207 | // those commands. it should be folded into may_execute, |
206 | // those commands. it should be folded into may_execute, |
208 | // but kept seperate to emphasise the hack aspect, i.e. |
207 | // but kept seperate to emphasise the hack aspect, i.e. |
209 | // do it better, then remove. |
208 | // do it better, then remove. |
210 | static bool |
209 | static bool |
211 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
210 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
212 | { |
211 | { |
213 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
212 | if (!(pkt->flags & PF_COMMAND)) |
214 | return false; |
213 | return false; |
215 | |
214 | |
216 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
215 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
217 | return false; |
216 | return false; |
218 | |
|
|
219 | if (pkt->flags & PF_COMMAND6) |
|
|
220 | { |
|
|
221 | data += 6; |
|
|
222 | len -= 6; |
|
|
223 | } |
|
|
224 | |
217 | |
225 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
218 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
226 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
219 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
227 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
220 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
228 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
221 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
… | |
… | |
246 | } |
239 | } |
247 | else |
240 | else |
248 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
241 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
249 | } |
242 | } |
250 | else |
243 | else |
251 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
244 | send_packet_printf ("msg %d log ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
252 | } |
245 | } |
253 | |
246 | |
254 | bool |
247 | bool |
255 | client::handle_packet () |
248 | client::handle_packet () |
256 | { |
249 | { |
… | |
… | |
298 | |
291 | |
299 | goto next_packet; |
292 | goto next_packet; |
300 | } |
293 | } |
301 | |
294 | |
302 | // If we get here, we didn't find a valid command. |
295 | // If we get here, we didn't find a valid command. |
303 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
296 | send_packet_printf ("msg %d log ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
304 | |
297 | |
305 | next_packet: |
298 | next_packet: |
306 | inbuf [pkt_len] = save_byte; // rather ugly |
299 | inbuf [pkt_len] = save_byte; // rather ugly |
307 | skip_packet (pkt_len); |
300 | skip_packet (pkt_len); |
308 | |
301 | |
… | |
… | |
343 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
336 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
344 | } |
337 | } |
345 | |
338 | |
346 | if (revents & EV_READ) |
339 | if (revents & EV_READ) |
347 | { |
340 | { |
348 | //TODO: rate-limit tcp connection in better ways, important |
341 | int amount; |
|
|
342 | uint8 *rbuf; |
349 | |
343 | |
|
|
344 | if (ws_version) |
|
|
345 | { |
|
|
346 | if (ws_inbuf_len + 2048 > ws_inbuf_alloc) |
|
|
347 | ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096); |
|
|
348 | |
|
|
349 | rbuf = ws_inbuf + ws_inbuf_len; |
|
|
350 | amount = ws_inbuf_alloc - ws_inbuf_len; |
|
|
351 | } |
|
|
352 | else |
|
|
353 | { |
|
|
354 | rbuf = inbuf + inbuf_len; |
350 | int amount = sizeof (inbuf) - inbuf_len; |
355 | amount = sizeof (inbuf) - inbuf_len; |
|
|
356 | } |
351 | |
357 | |
352 | if (!amount) |
358 | if (!amount) |
353 | { |
359 | { |
354 | // input buffer full |
360 | // input buffer full |
355 | socket_ev.poll (socket_ev.poll () & ~EV_READ); |
361 | LOG (llevError, "input buffer overflow."); |
|
|
362 | destroy (); |
356 | return; |
363 | return; |
357 | } |
364 | } |
358 | |
365 | |
359 | amount = read (fd, inbuf + inbuf_len, amount); |
366 | amount = read (fd, rbuf, amount); |
360 | |
367 | |
361 | if (!amount) |
368 | if (!amount) |
362 | { |
369 | { |
363 | destroy (); |
370 | destroy (); |
364 | return; |
371 | return; |
… | |
… | |
371 | destroy (); |
378 | destroy (); |
372 | return; |
379 | return; |
373 | } |
380 | } |
374 | |
381 | |
375 | // should not be here, normally |
382 | // should not be here, normally |
|
|
383 | } |
|
|
384 | |
|
|
385 | if (ws_version) |
|
|
386 | { |
|
|
387 | ws_inbuf_len += amount; |
|
|
388 | |
|
|
389 | while (ws_inbuf_len) |
|
|
390 | { |
|
|
391 | if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask |
|
|
392 | break; |
|
|
393 | |
|
|
394 | int d = 2; |
|
|
395 | int fin = ws_inbuf [0] & 0x80; |
|
|
396 | int op = ws_inbuf [0] & 0x0f; |
|
|
397 | int len = ws_inbuf [1] & 0x7f; |
|
|
398 | |
|
|
399 | if (len == 126) |
|
|
400 | { |
|
|
401 | len = (ws_inbuf [2] << 8) | ws_inbuf [3]; |
|
|
402 | d += 2; |
|
|
403 | } |
|
|
404 | else if (len == 127) |
|
|
405 | { |
|
|
406 | if (ws_inbuf_len < 2 + 8) |
|
|
407 | return; |
|
|
408 | |
|
|
409 | // we don't do extra long frames, if a browser wants to send >2**32 bytes, |
|
|
410 | // there are bigger issues to fix. |
|
|
411 | len = (ws_inbuf [8] << 8) | ws_inbuf [9]; |
|
|
412 | d += 8; |
|
|
413 | } |
|
|
414 | |
|
|
415 | // we only continue if we have a complete frame |
|
|
416 | if (ws_inbuf_len < d + 4 + len) |
|
|
417 | return; |
|
|
418 | |
|
|
419 | switch (op) |
|
|
420 | { |
|
|
421 | case 0: op = ws_inbuf_type; break; // continuation |
|
|
422 | case 1: ws_inbuf_type = 1; break; // utf-8 |
|
|
423 | case 2: ws_inbuf_type = 2; break; // binary |
|
|
424 | } |
|
|
425 | |
|
|
426 | if (len > sizeof (inbuf) - inbuf_len) |
|
|
427 | { |
|
|
428 | // input buffer full |
|
|
429 | LOG (llevError, "input buffer overflow (ws)."); |
|
|
430 | destroy (); |
|
|
431 | return; |
|
|
432 | } |
|
|
433 | |
|
|
434 | uint8 *buf = inbuf + inbuf_len + 2; |
|
|
435 | |
|
|
436 | for (int i = 0; i < len; ++i) |
|
|
437 | buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)]; |
|
|
438 | |
|
|
439 | // remove frame |
|
|
440 | ws_inbuf_len -= d + 4 + len; |
|
|
441 | memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len); |
|
|
442 | |
|
|
443 | switch (op) |
|
|
444 | { |
|
|
445 | case 1: // utf-8 |
|
|
446 | // utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases |
|
|
447 | // but we assume that these extra-long packets will be rare. |
|
|
448 | { |
|
|
449 | uint8 *a = buf; |
|
|
450 | uint8 *b = a; |
|
|
451 | uint8 *c = a + len; |
|
|
452 | |
|
|
453 | for (; a < c; ++a, ++b) |
|
|
454 | { |
|
|
455 | *b = *a; |
|
|
456 | |
|
|
457 | if (*a >= 0x80) |
|
|
458 | *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a; |
|
|
459 | } |
|
|
460 | |
|
|
461 | len -= a - b; |
|
|
462 | } |
|
|
463 | /* FALLTHROUGH */ |
|
|
464 | case 2: // binary |
|
|
465 | inbuf_len += len; |
|
|
466 | |
|
|
467 | if (fin) |
|
|
468 | { |
|
|
469 | inbuf [0] = inbuf_len >> 8; |
|
|
470 | inbuf [1] = inbuf_len; |
|
|
471 | |
|
|
472 | inbuf_len += 2; |
|
|
473 | |
|
|
474 | inbuf_handle (); |
|
|
475 | } |
|
|
476 | break; |
|
|
477 | |
|
|
478 | case 9: // ping |
|
|
479 | { |
|
|
480 | // send pong - we assume ping messages are <64k |
|
|
481 | // as we can't handle >10k at the moment anyway. |
|
|
482 | uint8 hdr [] = { 0x8a, 126, len >> 8, len }; |
|
|
483 | send (hdr, sizeof (hdr)); |
|
|
484 | send (inbuf + inbuf_len, len); |
|
|
485 | } |
|
|
486 | break; |
|
|
487 | |
|
|
488 | case 10: // pong |
|
|
489 | break; |
|
|
490 | |
|
|
491 | case 8: // close |
|
|
492 | default: |
|
|
493 | destroy (); |
|
|
494 | return; |
|
|
495 | } |
|
|
496 | } |
376 | } |
497 | } |
377 | else |
498 | else |
378 | { |
499 | { |
379 | inbuf_len += amount; |
500 | inbuf_len += amount; |
380 | inbuf_handle (); |
501 | inbuf_handle (); |
… | |
… | |
455 | } |
576 | } |
456 | |
577 | |
457 | if (!sl.length ()) |
578 | if (!sl.length ()) |
458 | return; |
579 | return; |
459 | |
580 | |
|
|
581 | if (ws_version == 8) |
|
|
582 | { |
|
|
583 | static uint8 buf [MAXSOCKBUF * 2 + 4]; |
|
|
584 | |
|
|
585 | uint8 *b = buf + 4; |
|
|
586 | for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a) |
|
|
587 | { |
|
|
588 | if (*a < 0x80) |
|
|
589 | *b++ = *a; |
|
|
590 | else |
|
|
591 | { |
|
|
592 | *b++ = 0xc0 | ((*a >> 6) & 0x1f); |
|
|
593 | *b++ = 0x80 | ( *a & 0x3f); |
|
|
594 | } |
|
|
595 | } |
|
|
596 | |
|
|
597 | assert (b - buf < sizeof (buf)); |
|
|
598 | |
|
|
599 | int len = b - (buf + 4); |
|
|
600 | |
|
|
601 | if (len < 126) |
|
|
602 | { |
|
|
603 | buf [2] = 0x81; |
|
|
604 | buf [3] = len; |
|
|
605 | |
|
|
606 | send (buf + 2, len + 2); |
|
|
607 | } |
|
|
608 | else |
|
|
609 | { |
|
|
610 | buf [0] = 0x81; |
|
|
611 | buf [1] = 126; |
|
|
612 | buf [2] = len >> 8; |
|
|
613 | buf [3] = len; |
|
|
614 | |
|
|
615 | send (buf, len + 4); |
|
|
616 | } |
|
|
617 | } |
|
|
618 | else if (ws_version == 13) |
|
|
619 | { |
|
|
620 | int len = sl.length (); |
|
|
621 | |
|
|
622 | if (len < 126) |
|
|
623 | { |
|
|
624 | uint8 hdr [] = { 0x82, len }; |
|
|
625 | send (hdr, sizeof (hdr)); |
|
|
626 | } |
|
|
627 | else |
|
|
628 | { |
|
|
629 | uint8 hdr [] = { 0x82, 126, len >> 8, len }; |
|
|
630 | send (hdr, sizeof (hdr)); |
|
|
631 | } |
|
|
632 | |
|
|
633 | send (sl.buf_ + sl.hdrlen, len); |
|
|
634 | } |
|
|
635 | else |
|
|
636 | { |
460 | assert (sl.hdrlen == 2); |
637 | assert (sl.hdrlen == 2); |
461 | |
638 | |
462 | sl.buf_ [0] = sl.length () >> 8; |
639 | sl.buf_ [0] = sl.length () >> 8; |
463 | sl.buf_ [1] = sl.length () ; |
640 | sl.buf_ [1] = sl.length () ; |
464 | |
641 | |
465 | send (sl.buf_, sl.length () + sl.hdrlen); |
642 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
643 | } |
466 | } |
644 | } |
467 | |
645 | |
468 | void |
646 | void |
469 | client::send_packet (const char *buf, int len) |
647 | client::send_packet (const char *buf, int len) |
470 | { |
648 | { |
… | |
… | |
510 | cfperl_send_msg (this, color, type, msg); |
688 | cfperl_send_msg (this, color, type, msg); |
511 | else |
689 | else |
512 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
690 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
513 | } |
691 | } |
514 | |
692 | |
515 | void |
|
|
516 | client::send_drawinfo (const char *msg, int flags) |
|
|
517 | { |
|
|
518 | send_msg (flags, "log", msg); |
|
|
519 | } |
|
|
520 | |
|
|
521 | /*********************************************************************** |
693 | /*********************************************************************** |
522 | * |
694 | * |
523 | * packet functions/utilities |
695 | * packet functions/utilities |
524 | * |
696 | * |
525 | **********************************************************************/ |
697 | **********************************************************************/ |