| 1 |
/* |
| 2 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 |
* |
| 4 |
* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 |
* |
| 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 |
| 8 |
* Free Software Foundation, either version 3 of the License, or (at your |
| 9 |
* option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the Affero GNU General Public License |
| 17 |
* and the GNU General Public License along with this program. If not, see |
| 18 |
* <http://www.gnu.org/licenses/>. |
| 19 |
* |
| 20 |
* The authors can be reached via e-mail to <support@deliantra.net> |
| 21 |
*/ |
| 22 |
|
| 23 |
using namespace std; |
| 24 |
|
| 25 |
#include <global.h> |
| 26 |
#include <sproto.h> |
| 27 |
#include <cstdarg> |
| 28 |
|
| 29 |
#if HAVE_TCP_INFO |
| 30 |
# include <sys/types.h> |
| 31 |
# include <sys/socket.h> |
| 32 |
# include <netinet/in.h> |
| 33 |
# include <netinet/tcp.h> |
| 34 |
#endif |
| 35 |
|
| 36 |
// force a packet when idle for more than this many seconds, |
| 37 |
// forcing an ack regularly. |
| 38 |
#define IDLE_PING 2. |
| 39 |
|
| 40 |
void |
| 41 |
client::flush () |
| 42 |
{ |
| 43 |
if (destroyed ()) |
| 44 |
return; |
| 45 |
|
| 46 |
/** |
| 47 |
* Writes data to socket. |
| 48 |
* |
| 49 |
* When the socket is clear to write, and we have backlogged data, this |
| 50 |
* is called to write it out. |
| 51 |
*/ |
| 52 |
|
| 53 |
// write a nop to the socket at least every IDLE_PING seconds. |
| 54 |
if (!outputbuffer.len) |
| 55 |
{ |
| 56 |
if (last_send + IDLE_PING <= NOW && pl && pl->active) |
| 57 |
{ |
| 58 |
// this is a bit ugly, but map1a seems to be the only |
| 59 |
// nop'able command and it is quite small. |
| 60 |
packet sl ("map1a"); |
| 61 |
send_packet (sl); |
| 62 |
} |
| 63 |
else |
| 64 |
return; |
| 65 |
} |
| 66 |
|
| 67 |
if (socket_ev.poll () & EV_WRITE) |
| 68 |
return; |
| 69 |
|
| 70 |
last_send = NOW; |
| 71 |
write_outputbuffer (); |
| 72 |
} |
| 73 |
|
| 74 |
void |
| 75 |
client::write_outputbuffer () |
| 76 |
{ |
| 77 |
while (outputbuffer.len) |
| 78 |
{ |
| 79 |
int res = write (fd, outputbuffer.data + outputbuffer.start, |
| 80 |
min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
| 81 |
|
| 82 |
if (res > 0) |
| 83 |
{ |
| 84 |
outputbuffer.start += res; |
| 85 |
/* wrap back to start of buffer */ |
| 86 |
if (outputbuffer.start == SOCKETBUFSIZE) |
| 87 |
outputbuffer.start = 0; |
| 88 |
|
| 89 |
outputbuffer.len -= res; |
| 90 |
} |
| 91 |
else if (res == 0) |
| 92 |
{ |
| 93 |
LOG (llevError, "socket write failed, connection closed.\n"); |
| 94 |
destroy (); |
| 95 |
return; |
| 96 |
} |
| 97 |
else if (errno == EINTR) |
| 98 |
{ |
| 99 |
// just retry |
| 100 |
} |
| 101 |
else if (errno == EAGAIN) |
| 102 |
{ |
| 103 |
// delay till ready |
| 104 |
socket_ev.poll (socket_ev.poll () | EV_WRITE); |
| 105 |
socket_ev.start (); |
| 106 |
return; |
| 107 |
} |
| 108 |
else |
| 109 |
{ |
| 110 |
LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
| 111 |
destroy (); |
| 112 |
return; |
| 113 |
} |
| 114 |
} |
| 115 |
|
| 116 |
socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
| 117 |
} |
| 118 |
|
| 119 |
/****************************************************************************** |
| 120 |
* |
| 121 |
* Start of read routines. |
| 122 |
* |
| 123 |
******************************************************************************/ |
| 124 |
|
| 125 |
int |
| 126 |
client::next_packet () |
| 127 |
{ |
| 128 |
if (inbuf_len >= 2) |
| 129 |
{ |
| 130 |
int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
| 131 |
|
| 132 |
if (inbuf_len >= 2 + pkt_len) |
| 133 |
return 2 + pkt_len; |
| 134 |
|
| 135 |
if (inbuf_len == sizeof (inbuf)) |
| 136 |
{ |
| 137 |
send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
| 138 |
destroy (); |
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return -1; |
| 140 |
} |
| 141 |
} |
| 142 |
|
| 143 |
return 0; |
| 144 |
} |
| 145 |
|
| 146 |
void |
| 147 |
client::skip_packet (int len) |
| 148 |
{ |
| 149 |
inbuf_len -= len; |
| 150 |
memmove (inbuf, inbuf + len, inbuf_len); |
| 151 |
} |
| 152 |
|
| 153 |
/***************************************************************************** |
| 154 |
* Start of command dispatch area. |
| 155 |
* The commands here are protocol commands. |
| 156 |
****************************************************************************/ |
| 157 |
|
| 158 |
// SocketCommand, PlayingCommand, should not exist with those ugly casts |
| 159 |
#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
| 160 |
#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
| 161 |
|
| 162 |
static void |
| 163 |
NopCmd (char *, int, client *) |
| 164 |
{ |
| 165 |
// do nothing |
| 166 |
} |
| 167 |
|
| 168 |
/** |
| 169 |
* Dispatch table for the server. |
| 170 |
*/ |
| 171 |
static struct packet_type packets[] = { |
| 172 |
{"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
| 173 |
{"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
| 174 |
|
| 175 |
{"examine", PC(ExamineCmd) PF_PLAYING }, |
| 176 |
{"ex", PC(ExCmd) PF_PLAYING }, |
| 177 |
{"apply", PC(ApplyCmd) PF_PLAYING }, |
| 178 |
{"lookat", PC(LookAt) PF_PLAYING }, |
| 179 |
{"lock", PC(LockItem) PF_PLAYING }, |
| 180 |
{"mark", PC(MarkItem) PF_PLAYING }, |
| 181 |
{"move", PC(MoveCmd) PF_PLAYING }, |
| 182 |
{"ext", PC(ExtCmd) 0 }, // CF+/Deliantra |
| 183 |
{"mapredraw", PC(MapRedrawCmd) 0 }, |
| 184 |
{"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra |
| 185 |
|
| 186 |
{"reply", SC(ReplyCmd) 0 }, |
| 187 |
{"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra |
| 188 |
{"addme", SC(AddMeCmd) 0 }, |
| 189 |
{"askface", SC(AskFaceCmd) 0 }, |
| 190 |
{"requestinfo", SC(RequestInfo) 0 }, |
| 191 |
{"setsound", SC(SetSound) 0 }, |
| 192 |
{"setup", SC(SetUp) 0 }, |
| 193 |
{"version", SC(VersionCmd) 0 }, |
| 194 |
|
| 195 |
{"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled |
| 196 |
}; |
| 197 |
|
| 198 |
bool |
| 199 |
client::may_execute (const packet_type *pkt) const |
| 200 |
{ |
| 201 |
return (!(pkt->flags & PF_PLAYER) || pl) |
| 202 |
&& (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
| 203 |
} |
| 204 |
|
| 205 |
// HACK: some commands currently should be executed |
| 206 |
// even when the player is frozen. this hack detects |
| 207 |
// those commands. it should be folded into may_execute, |
| 208 |
// but kept seperate to emphasise the hack aspect, i.e. |
| 209 |
// do it better, then remove. |
| 210 |
static bool |
| 211 |
always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
| 212 |
{ |
| 213 |
if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
| 214 |
return false; |
| 215 |
|
| 216 |
if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
| 217 |
return false; |
| 218 |
|
| 219 |
if (pkt->flags & PF_COMMAND6) |
| 220 |
{ |
| 221 |
data += 6; |
| 222 |
len -= 6; |
| 223 |
} |
| 224 |
|
| 225 |
if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
| 226 |
if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
| 227 |
if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
| 228 |
if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
| 229 |
if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true; |
| 230 |
|
| 231 |
if (len == 7 && !strcmp (data, "suicide")) return true; |
| 232 |
|
| 233 |
return false; |
| 234 |
} |
| 235 |
|
| 236 |
void |
| 237 |
client::execute (const packet_type *pkt, char *data, int datalen) |
| 238 |
{ |
| 239 |
if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
| 240 |
{ |
| 241 |
//TODO: only one format |
| 242 |
if (pkt->flags & PF_PLAYER) |
| 243 |
{ |
| 244 |
((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
| 245 |
pl->need_updated_stats (); |
| 246 |
} |
| 247 |
else |
| 248 |
((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
| 249 |
} |
| 250 |
else |
| 251 |
send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
| 252 |
} |
| 253 |
|
| 254 |
bool |
| 255 |
client::handle_packet () |
| 256 |
{ |
| 257 |
int pkt_len = next_packet (); |
| 258 |
|
| 259 |
if (!pkt_len) |
| 260 |
return false; |
| 261 |
else if (pkt_len < 0) |
| 262 |
{ |
| 263 |
LOG (llevError, "read error on player %s\n", |
| 264 |
pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
| 265 |
destroy (); |
| 266 |
return false; |
| 267 |
} |
| 268 |
|
| 269 |
uint8_t save_byte = inbuf [pkt_len]; // rather ugly |
| 270 |
inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */ |
| 271 |
|
| 272 |
/* First, break out beginning word. There are at least |
| 273 |
* a few commands that do not have any paremeters. If |
| 274 |
* we get such a command, don't worry about trying |
| 275 |
* to break it up. |
| 276 |
*/ |
| 277 |
int datalen; |
| 278 |
char *data = strchr ((char *)inbuf + 2, ' '); |
| 279 |
|
| 280 |
if (data) |
| 281 |
{ |
| 282 |
*data++ = 0; |
| 283 |
datalen = pkt_len - (data - (char *)inbuf); |
| 284 |
} |
| 285 |
else |
| 286 |
{ |
| 287 |
data = (char *)inbuf + 2; // better read garbage than segfault |
| 288 |
datalen = 0; |
| 289 |
} |
| 290 |
|
| 291 |
for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt) |
| 292 |
if (!strcmp ((char *)inbuf + 2, pkt->name)) |
| 293 |
{ |
| 294 |
if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
| 295 |
queue_command (pkt, data, datalen); |
| 296 |
else |
| 297 |
execute (pkt, data, datalen); |
| 298 |
|
| 299 |
goto next_packet; |
| 300 |
} |
| 301 |
|
| 302 |
// 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); |
| 304 |
|
| 305 |
next_packet: |
| 306 |
inbuf [pkt_len] = save_byte; // rather ugly |
| 307 |
skip_packet (pkt_len); |
| 308 |
|
| 309 |
// input buffer has space again |
| 310 |
socket_ev.poll (socket_ev.poll () | EV_READ); |
| 311 |
|
| 312 |
return true; |
| 313 |
} |
| 314 |
|
| 315 |
void |
| 316 |
client::inbuf_handle () |
| 317 |
{ |
| 318 |
if (!handle_packet ()) |
| 319 |
return; |
| 320 |
|
| 321 |
while (handle_packet ()) |
| 322 |
; |
| 323 |
|
| 324 |
flush (); |
| 325 |
} |
| 326 |
|
| 327 |
// callback called when socket is either readable or writable |
| 328 |
void |
| 329 |
client::socket_cb (iow &w, int revents) |
| 330 |
{ |
| 331 |
//TODO remove when we have better socket cleanup logic |
| 332 |
if (destroyed ()) |
| 333 |
{ |
| 334 |
socket_ev.poll (0); |
| 335 |
return; |
| 336 |
} |
| 337 |
|
| 338 |
if (revents & EV_WRITE) |
| 339 |
{ |
| 340 |
write_outputbuffer (); |
| 341 |
|
| 342 |
if (!outputbuffer.len) |
| 343 |
socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
| 344 |
} |
| 345 |
|
| 346 |
if (revents & EV_READ) |
| 347 |
{ |
| 348 |
int amount; |
| 349 |
uint8 *rbuf; |
| 350 |
|
| 351 |
if (ws_version) |
| 352 |
{ |
| 353 |
if (ws_inbuf_len + 2048 > ws_inbuf_alloc) |
| 354 |
ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096); |
| 355 |
|
| 356 |
rbuf = ws_inbuf; |
| 357 |
amount = ws_inbuf_alloc - ws_inbuf_len; |
| 358 |
} |
| 359 |
else |
| 360 |
{ |
| 361 |
rbuf = inbuf; |
| 362 |
amount = sizeof (inbuf) - inbuf_len; |
| 363 |
} |
| 364 |
|
| 365 |
if (!amount) |
| 366 |
{ |
| 367 |
// input buffer full |
| 368 |
LOG (llevError, "input buffer overflow."); |
| 369 |
destroy (); |
| 370 |
return; |
| 371 |
} |
| 372 |
|
| 373 |
amount = read (fd, ws_inbuf + ws_inbuf_len, amount); |
| 374 |
|
| 375 |
if (!amount) |
| 376 |
{ |
| 377 |
destroy (); |
| 378 |
return; |
| 379 |
} |
| 380 |
else if (amount < 0) |
| 381 |
{ |
| 382 |
if (errno != EAGAIN && errno != EINTR) |
| 383 |
{ |
| 384 |
LOG (llevError, "read error: %s\n", strerror (errno)); |
| 385 |
destroy (); |
| 386 |
return; |
| 387 |
} |
| 388 |
|
| 389 |
// should not be here, normally |
| 390 |
} |
| 391 |
|
| 392 |
if (ws_version) |
| 393 |
{ |
| 394 |
ws_inbuf_len += amount; |
| 395 |
|
| 396 |
while (ws_inbuf_len) |
| 397 |
{ |
| 398 |
if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask |
| 399 |
break; |
| 400 |
|
| 401 |
int d = 2; |
| 402 |
int fin = ws_inbuf [0] & 0x80; |
| 403 |
int op = ws_inbuf [0] & 0x0f; |
| 404 |
int len = ws_inbuf [1] & 0x7f; |
| 405 |
|
| 406 |
if (len == 126) |
| 407 |
{ |
| 408 |
len = (ws_inbuf [2] << 8) | ws_inbuf [3]; |
| 409 |
d += 2; |
| 410 |
} |
| 411 |
else if (len == 127) |
| 412 |
{ |
| 413 |
if (ws_inbuf_len < 2 + 8) |
| 414 |
return; |
| 415 |
|
| 416 |
// we don't do extra long frames, if a browser wants to send >2**32 bytes, |
| 417 |
// there are bigger issues to fix. |
| 418 |
len = (ws_inbuf [8] << 8) | ws_inbuf [9]; |
| 419 |
d += 8; |
| 420 |
} |
| 421 |
|
| 422 |
// we only continue if we have a complete frame |
| 423 |
if (ws_inbuf_len < d + 4 + len) |
| 424 |
return; |
| 425 |
|
| 426 |
switch (op) |
| 427 |
{ |
| 428 |
case 0: op = ws_inbuf_type; break; // continuation |
| 429 |
case 1: ws_inbuf_type = 1; break; // utf-8 |
| 430 |
case 2: ws_inbuf_type = 2; break; // binary |
| 431 |
} |
| 432 |
|
| 433 |
if (len > sizeof (inbuf) - inbuf_len) |
| 434 |
{ |
| 435 |
// input buffer full |
| 436 |
LOG (llevError, "input buffer overflow (ws)."); |
| 437 |
destroy (); |
| 438 |
return; |
| 439 |
} |
| 440 |
|
| 441 |
uint8 *buf = inbuf + inbuf_len + 2; |
| 442 |
|
| 443 |
for (int i = 0; i < len; ++i) |
| 444 |
buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)]; |
| 445 |
|
| 446 |
// remove frame |
| 447 |
ws_inbuf_len -= d + 4 + len; |
| 448 |
memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len); |
| 449 |
|
| 450 |
switch (op) |
| 451 |
{ |
| 452 |
case 1: // utf-8 |
| 453 |
// utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases |
| 454 |
// but we assume that these extra-long packets will be rare. |
| 455 |
{ |
| 456 |
uint8 *a = buf; |
| 457 |
uint8 *b = a; |
| 458 |
uint8 *c = a + len; |
| 459 |
|
| 460 |
for (; a < c; ++a, ++b) |
| 461 |
{ |
| 462 |
*b = *a; |
| 463 |
|
| 464 |
if (*a >= 0x80) |
| 465 |
*b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a; |
| 466 |
} |
| 467 |
|
| 468 |
len -= a - b; |
| 469 |
} |
| 470 |
/* FALLTHROUGH */ |
| 471 |
case 2: // binary |
| 472 |
inbuf_len += len; |
| 473 |
|
| 474 |
if (fin) |
| 475 |
{ |
| 476 |
inbuf [0] = inbuf_len >> 8; |
| 477 |
inbuf [1] = inbuf_len; |
| 478 |
|
| 479 |
inbuf_len += 2; |
| 480 |
|
| 481 |
inbuf_handle (); |
| 482 |
} |
| 483 |
break; |
| 484 |
|
| 485 |
case 9: // ping |
| 486 |
{ |
| 487 |
// send pong - we assume ping messages are <64k |
| 488 |
// as we can't handle >10k at the moment anyway. |
| 489 |
uint8 hdr [] = { 0x8a, 126, len >> 8, len }; |
| 490 |
send (hdr, sizeof (hdr)); |
| 491 |
send (inbuf + inbuf_len, len); |
| 492 |
} |
| 493 |
break; |
| 494 |
|
| 495 |
case 10: // pong |
| 496 |
break; |
| 497 |
|
| 498 |
case 8: // close |
| 499 |
default: |
| 500 |
destroy (); |
| 501 |
return; |
| 502 |
} |
| 503 |
} |
| 504 |
} |
| 505 |
else |
| 506 |
{ |
| 507 |
inbuf_len += amount; |
| 508 |
inbuf_handle (); |
| 509 |
} |
| 510 |
} |
| 511 |
} |
| 512 |
|
| 513 |
/******************************************************************************* |
| 514 |
* |
| 515 |
* Start of write related routines. |
| 516 |
* |
| 517 |
******************************************************************************/ |
| 518 |
|
| 519 |
/** |
| 520 |
* Adds data to a socket buffer for whatever reason. |
| 521 |
* |
| 522 |
* ns is the socket we are adding the data to, buf is the start of the |
| 523 |
* data, and len is the number of bytes to add. |
| 524 |
*/ |
| 525 |
void |
| 526 |
client::send (void *buf_, int len) |
| 527 |
{ |
| 528 |
char *buf = (char *)buf_; |
| 529 |
|
| 530 |
if (destroyed () || !buf) |
| 531 |
return; |
| 532 |
|
| 533 |
if (len + outputbuffer.len > SOCKETBUFSIZE) |
| 534 |
{ |
| 535 |
LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
| 536 |
// shutdown the socket, this is safer than destroying it immediately |
| 537 |
// as lots of code in the callchain might still access the map etc. |
| 538 |
shutdown (fd, SHUT_RDWR); |
| 539 |
return; |
| 540 |
} |
| 541 |
|
| 542 |
int avail, end; |
| 543 |
|
| 544 |
/* data + end is where we start putting the new data. The last byte |
| 545 |
* currently in use is actually data + end -1 |
| 546 |
*/ |
| 547 |
end = outputbuffer.start + outputbuffer.len; |
| 548 |
/* The buffer is already in a wrapped state, so adjust end */ |
| 549 |
if (end >= SOCKETBUFSIZE) |
| 550 |
end -= SOCKETBUFSIZE; |
| 551 |
|
| 552 |
avail = SOCKETBUFSIZE - end; |
| 553 |
|
| 554 |
/* We can all fit it behind the current data without wrapping */ |
| 555 |
if (avail >= len) |
| 556 |
memcpy (outputbuffer.data + end, buf, len); |
| 557 |
else |
| 558 |
{ |
| 559 |
memcpy (outputbuffer.data + end, buf, avail); |
| 560 |
memcpy (outputbuffer.data, buf + avail, len - avail); |
| 561 |
} |
| 562 |
|
| 563 |
outputbuffer.len += len; |
| 564 |
} |
| 565 |
|
| 566 |
/** |
| 567 |
* Takes a string of data, and writes it out to the socket. A very handy |
| 568 |
* shortcut function. |
| 569 |
*/ |
| 570 |
void |
| 571 |
client::send_packet (packet &sl) |
| 572 |
{ |
| 573 |
if (destroyed ()) |
| 574 |
return; |
| 575 |
|
| 576 |
if (sl.length () > MAXSOCKBUF) |
| 577 |
{ |
| 578 |
LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
| 579 |
/* Almost certainly we've overflowed a buffer, so quit now to make |
| 580 |
* it easier to debug. |
| 581 |
*/ |
| 582 |
abort (); |
| 583 |
} |
| 584 |
|
| 585 |
if (!sl.length ()) |
| 586 |
return; |
| 587 |
|
| 588 |
if (ws_version == 8) |
| 589 |
{ |
| 590 |
static uint8 buf [MAXSOCKBUF * 2 + 4]; |
| 591 |
|
| 592 |
uint8 *b = buf + 4; |
| 593 |
for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a) |
| 594 |
{ |
| 595 |
if (*a < 0x80) |
| 596 |
*b++ = *a; |
| 597 |
else |
| 598 |
{ |
| 599 |
*b++ = 0xc0 | ((*a >> 6) & 0x1f); |
| 600 |
*b++ = 0x80 | ( *a & 0x3f); |
| 601 |
} |
| 602 |
} |
| 603 |
|
| 604 |
assert (b - buf < sizeof (buf)); |
| 605 |
|
| 606 |
int len = b - (buf + 4); |
| 607 |
|
| 608 |
if (len < 126) |
| 609 |
{ |
| 610 |
buf [2] = 0x81; |
| 611 |
buf [3] = len; |
| 612 |
|
| 613 |
send (buf + 2, len + 2); |
| 614 |
} |
| 615 |
else |
| 616 |
{ |
| 617 |
buf [0] = 0x81; |
| 618 |
buf [1] = 126; |
| 619 |
buf [2] = len >> 8; |
| 620 |
buf [3] = len; |
| 621 |
|
| 622 |
send (buf, len + 4); |
| 623 |
} |
| 624 |
} |
| 625 |
else if (ws_version == 13) |
| 626 |
{ |
| 627 |
int len = sl.length (); |
| 628 |
|
| 629 |
if (len < 126) |
| 630 |
{ |
| 631 |
uint8 hdr [] = { 0x82, len }; |
| 632 |
send (hdr, sizeof (hdr)); |
| 633 |
} |
| 634 |
else |
| 635 |
{ |
| 636 |
uint8 hdr [] = { 0x82, 126, len >> 8, len }; |
| 637 |
send (hdr, sizeof (hdr)); |
| 638 |
} |
| 639 |
|
| 640 |
send (sl.buf_ + sl.hdrlen, len); |
| 641 |
} |
| 642 |
else |
| 643 |
{ |
| 644 |
assert (sl.hdrlen == 2); |
| 645 |
|
| 646 |
sl.buf_ [0] = sl.length () >> 8; |
| 647 |
sl.buf_ [1] = sl.length () ; |
| 648 |
|
| 649 |
send (sl.buf_, sl.length () + sl.hdrlen); |
| 650 |
} |
| 651 |
} |
| 652 |
|
| 653 |
void |
| 654 |
client::send_packet (const char *buf, int len) |
| 655 |
{ |
| 656 |
packet sl; |
| 657 |
|
| 658 |
sl << data (buf, len); |
| 659 |
send_packet (sl); |
| 660 |
} |
| 661 |
|
| 662 |
void |
| 663 |
client::send_packet (const char *buf) |
| 664 |
{ |
| 665 |
send_packet (buf, strlen (buf)); |
| 666 |
} |
| 667 |
|
| 668 |
void |
| 669 |
client::send_packet_printf (const char *format, ...) |
| 670 |
{ |
| 671 |
packet sl; |
| 672 |
|
| 673 |
va_list ap; |
| 674 |
va_start (ap, format); |
| 675 |
sl.vprintf (format, ap); |
| 676 |
va_end (ap); |
| 677 |
|
| 678 |
send_packet (sl); |
| 679 |
} |
| 680 |
|
| 681 |
void |
| 682 |
client::send_msg (int color, const char *type, const char *msg) |
| 683 |
{ |
| 684 |
if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
| 685 |
{ |
| 686 |
LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
| 687 |
return; |
| 688 |
} |
| 689 |
|
| 690 |
int len = strlen (msg); |
| 691 |
|
| 692 |
if (!(color & NDI_VERBATIM) |
| 693 |
&& (msg_is_special (msg) |
| 694 |
|| (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
| 695 |
cfperl_send_msg (this, color, type, msg); |
| 696 |
else |
| 697 |
send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
| 698 |
} |
| 699 |
|
| 700 |
void |
| 701 |
client::send_drawinfo (const char *msg, int flags) |
| 702 |
{ |
| 703 |
send_msg (flags, "log", msg); |
| 704 |
} |
| 705 |
|
| 706 |
/*********************************************************************** |
| 707 |
* |
| 708 |
* packet functions/utilities |
| 709 |
* |
| 710 |
**********************************************************************/ |
| 711 |
|
| 712 |
packet::packet (const char *name) |
| 713 |
{ |
| 714 |
reset (); |
| 715 |
|
| 716 |
int len = strlen (name); |
| 717 |
memcpy (cur, name, len); cur += len; |
| 718 |
*cur++ = ' '; |
| 719 |
} |
| 720 |
|
| 721 |
packet &packet::operator <<(const ber32 v) |
| 722 |
{ |
| 723 |
enum { maxlen = 32 / 7 + 1 }; |
| 724 |
uint8 buf[maxlen]; |
| 725 |
uint8 *p = buf + maxlen; |
| 726 |
uint32 val = v.val; |
| 727 |
|
| 728 |
*--p = val & 0x7F; |
| 729 |
|
| 730 |
while (val > 0x7F) |
| 731 |
{ |
| 732 |
val >>= 7; |
| 733 |
*--p = (val & 0x7F) | 0x80; |
| 734 |
} |
| 735 |
|
| 736 |
return *this << data (p, buf + maxlen - p); |
| 737 |
} |
| 738 |
|
| 739 |
packet &packet::operator <<(const data &v) |
| 740 |
{ |
| 741 |
if (room () < v.len) |
| 742 |
reset (); |
| 743 |
else |
| 744 |
{ |
| 745 |
if (v.len) |
| 746 |
{ |
| 747 |
memcpy (cur, v.ptr, v.len); |
| 748 |
cur += v.len; |
| 749 |
} |
| 750 |
} |
| 751 |
|
| 752 |
return *this; |
| 753 |
} |
| 754 |
|
| 755 |
packet &packet::operator <<(const data8 &v) |
| 756 |
{ |
| 757 |
unsigned int len = min (v.len, 0x00FF); |
| 758 |
return *this << uint8 (len) << data (v.ptr, len); |
| 759 |
} |
| 760 |
|
| 761 |
packet &packet::operator <<(const data16 &v) |
| 762 |
{ |
| 763 |
unsigned int len = min (v.len, 0xFFFF); |
| 764 |
return *this << uint16 (len) << data (v.ptr, len); |
| 765 |
} |
| 766 |
|
| 767 |
packet &packet::operator <<(const char *v) |
| 768 |
{ |
| 769 |
return *this << data (v, strlen (v ? v : 0)); |
| 770 |
} |
| 771 |
|
| 772 |
void |
| 773 |
packet::vprintf (const char *format, va_list ap) |
| 774 |
{ |
| 775 |
int size = room (); |
| 776 |
|
| 777 |
int len = vsnprintf ((char *)cur, size, format, ap); |
| 778 |
|
| 779 |
if (len >= size) |
| 780 |
return reset (); |
| 781 |
|
| 782 |
cur += len; |
| 783 |
} |
| 784 |
|
