moonbridge: b2d024220782 moonbridge

moonbridge

view moonbridge_io.c @ 176:b2d024220782

Renamed remaining_header_size_limit and remaining_body_size_limit to local "limit" variables

author	jbe
date	Thu Jun 18 22:16:08 2015 +0200 (2015-06-18)
parents	08cf8e1865e9
children	d338068fad0d

line source

2 #if defined(__linux__)

3 #define _GNU_SOURCE

4 #endif

5 #include <stdlib.h>

6 #include <stdint.h>

7 #include <string.h>

8 #include <errno.h>

9 #include <unistd.h>

10 #include <signal.h>

11 #include <fcntl.h>

12 #include <sys/stat.h>

13 #include <sys/socket.h>

14 #include <sys/un.h>

15 #include <netinet/in.h>

16 #include <netinet/tcp.h>

17 #include <sys/select.h>

18 #include <time.h>

19 #include <netdb.h>

20 #include <arpa/inet.h>

22 #include <lua.h>

23 #include <lauxlib.h>

24 #include <lualib.h>

26 #include <assert.h>

28 #define MOONBR_IO_MAXSTRERRORLEN 80

29 #define MOONBR_IO_READBUFLEN 4096

30 #define MOONBR_IO_WRITEBUFLEN 4096

32 #define MOONBR_IO_LISTEN_BACKLOG 1024

34 #define moonbr_io_errmsg() \

35 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \

36 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)

38 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"

39 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"

40 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"

42 typedef struct {

43 int fd;

44 int issock;

45 sa_family_t addrfam;

46 int finished;

47 int closed;

48 int nonblocking;

49 int nopush;

50 int readerr;

51 int readbufin;

52 int readbufout;

53 int writeerr;

54 size_t writeleft;

55 size_t flushedleft;

56 #if LUA_VERSION_NUM >= 503

57 lua_Integer writeqin;

58 lua_Integer writeqout;

59 #else

60 int writeqin;

61 int writeqout;

62 #endif

63 size_t writeqoff;

64 int writebufin;

65 int writebufout;

66 char readbuf[MOONBR_IO_READBUFLEN];

67 char writebuf[MOONBR_IO_WRITEBUFLEN];

68 } moonbr_io_handle_t;

70 typedef struct {

71 int fd;

72 sa_family_t addrfam;

73 int nonblocking;

74 } moonbr_io_listener_t;

76 static int moonbr_io_yield(lua_State *L) {

77 return lua_yield(L, lua_gettop(L));

78 }

80 #if LUA_VERSION_NUM >= 503

81 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {

82 #else

83 static int moonbr_io_cont_returnall(lua_State *L) {

84 #endif

85 return lua_gettop(L);

86 }

88 #define moonbr_io_yield_wrapper(yieldfunc, callfunc) \

89 static int yieldfunc(lua_State *L) { \

90 int args; \

91 lua_pushcfunction(L, callfunc); \

92 lua_insert(L, 1); \

93 args = lua_gettop(L); \

94 lua_pushcfunction(L, moonbr_io_yield); \

95 lua_insert(L, 3); \

96 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall); \

97 return lua_gettop(L); \

98 }

100 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {

101 int flags;

102 if (handle->nonblocking == nonblocking) return;

103 flags = fcntl(handle->fd, F_GETFL, 0);

104 if (flags == -1) {

105 moonbr_io_errmsg();

106 close(handle->fd);

107 handle->fd = -1;

108 handle->closed = 1;

109 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);

110 }

111 if (nonblocking) flags |= O_NONBLOCK;

112 else flags &= ~O_NONBLOCK;

113 if (fcntl(handle->fd, F_SETFL, flags) == -1) {

114 moonbr_io_errmsg();

115 close(handle->fd);

116 handle->fd = -1;

117 handle->closed = 1;

118 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);

119 }

120 handle->nonblocking = nonblocking;

121 }

122

123 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {

124 struct linger lingerval = { 0, };

125 if (!handle->issock) return;

126 if (timeout >= 0) {

127 lingerval.l_onoff = 1;

128 lingerval.l_linger = timeout;

129 }

130 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {

131 moonbr_io_errmsg();

132 close(handle->fd);

133 handle->fd = -1;

134 handle->closed = 1;

135 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);

136 }

137 }

138

139 static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {

140 #if defined(TCP_NOPUSH) || defined(TCP_CORK)

141 if (

142 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||

143 handle->nopush == nopush

144 ) return;

145 #if defined(TCP_NOPUSH)

146 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {

147 #elif defined(TCP_CORK)

148 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {

149 #endif

150 moonbr_io_errmsg();

151 close(handle->fd);

152 handle->fd = -1;

153 handle->closed = 1;

154 #if defined(TCP_NOPUSH)

155 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);

156 #elif defined(TCP_CORK)

157 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);

158 #endif

159 }

160 handle->nopush = nopush;

161 #else

162 #warning Neither TCP_NOPUSH nor TCP_CORK is available

163 #endif

164 }

165

166 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {

167 moonbr_io_handle_t *handle;

168 lua_Integer maxread;

169 const char *terminatorstr;

170 size_t terminatorlen;

171 char terminator = 0; /* initialize to avoid compiler warning */

172 luaL_Buffer luabuf;

173 size_t luabufcnt = 0;

174 int remaining;

175 char *terminatorpos;

176 ssize_t bytesread;

177 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

178 maxread = luaL_optinteger(L, 2, -1);

179 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);

180 if (terminatorlen) {

181 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");

182 terminator = terminatorstr[0];

183 }

184 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */

185 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");

186 if (handle->readerr) {

187 lua_pushnil(L);

188 lua_pushliteral(L, "Previous read error");

189 return 2;

190 }

191 if (handle->fd < 0) {

192 /* fake EOF to simulate shutdown */

193 if (!drain) lua_pushliteral(L, "");

194 else lua_pushinteger(L, 0);

195 lua_pushliteral(L, "eof");

196 return 2;

197 }

198 handle->readerr = 1;

199 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);

200 if (!drain) luaL_buffinit(L, &luabuf);

201 while (1) {

202 remaining = -1;

203 terminatorpos = NULL;

204 if (

205 maxread >= 0 &&

206 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt

207 ) {

208 remaining = (size_t)maxread - luabufcnt;

209 terminatorpos = memchr(

210 handle->readbuf + handle->readbufout,

211 terminator,

212 remaining

213 );

214 } else if (terminatorlen) {

215 terminatorpos = memchr(

216 handle->readbuf + handle->readbufout,

217 terminator,

218 handle->readbufin - handle->readbufout

219 );

220 }

221 if (terminatorpos) remaining = 1 + (

222 terminatorpos - (handle->readbuf + handle->readbufout)

223 );

224 if (remaining >= 0) {

225 if (!drain) {

226 luaL_addlstring(

227 &luabuf,

228 handle->readbuf + handle->readbufout,

229 remaining

230 );

231 luaL_pushresult(&luabuf);

232 } else {

233 lua_pushinteger(L, luabufcnt + remaining);

234 }

235 if (terminatorpos) lua_pushliteral(L, "term");

236 else lua_pushliteral(L, "maxlen");

237 handle->readbufout += remaining;

238 if (handle->readbufout == handle->readbufin) {

239 handle->readbufin = 0;

240 handle->readbufout = 0;

241 }

242 handle->readerr = 0;

243 return 2;

244 }

245 if (!drain) luaL_addlstring(

246 &luabuf,

247 handle->readbuf + handle->readbufout,

248 handle->readbufin - handle->readbufout

249 );

250 luabufcnt += handle->readbufin - handle->readbufout;

251 handle->readbufout = 0;

252 do {

253 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);

254 } while (bytesread < 0 && (errno == EINTR));

255 if (

256 bytesread == 0 || (

257 nonblocking &&

258 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)

259 )

260 ) {

261 handle->readbufin = 0;

262 if (!drain) luaL_pushresult(&luabuf);

263 else lua_pushinteger(L, luabufcnt);

264 if (bytesread == 0) lua_pushliteral(L, "eof");

265 else lua_pushliteral(L, "block");

266 handle->readerr = 0;

267 return 2;

268 }

269 if (bytesread < 0) {

270 moonbr_io_errmsg();

271 lua_pushnil(L);

272 lua_pushstring(L, errmsg);

273 return 2;

274 }

275 handle->readbufin = bytesread;

276 }

277 }

278

279 static int moonbr_io_read(lua_State *L) {

280 return moonbr_io_read_impl(L, 0, 0);

281 }

282

283 static int moonbr_io_read_nb(lua_State *L) {

284 return moonbr_io_read_impl(L, 1, 0);

285 }

286

287 static int moonbr_io_drain(lua_State *L) {

288 return moonbr_io_read_impl(L, 0, 1);

289 }

290

291 static int moonbr_io_drain_nb(lua_State *L) {

292 return moonbr_io_read_impl(L, 1, 1);

293 }

294

295 #if LUA_VERSION_NUM >= 503

296 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {

297 #else

298 static int moonbr_io_read_cont(lua_State *L) {

299 #endif

300 lua_Integer remaining;

301 size_t len;

302 #if !(LUA_VERSION_NUM >= 503)

303 int ctx = 0;

304 lua_getctx(L, &ctx);

305 #endif

306 remaining = lua_tointeger(L, 3);

307 while (1) {

308 lua_pushcfunction(L, moonbr_io_read_nb);

309 lua_pushvalue(L, 1);

310 lua_pushvalue(L, 3);

311 lua_pushvalue(L, 4);

312 lua_call(L, 3, 2);

313 if (lua_isnil(L, -2)) return 2;

314 lua_insert(L, -2);

315 len = lua_rawlen(L, -1);

316 if (ctx == 0) {

317 lua_replace(L, 5);

318 ctx = 1;

319 } else if (ctx == 1) {

320 lua_pushvalue(L, 5);

321 lua_newtable(L);

322 lua_replace(L, 5);

323 lua_rawseti(L, 5, 2);

324 lua_rawseti(L, 5, 1);

325 ctx = 2;

326 } else {

327 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);

328 }

329 if (strcmp(lua_tostring(L, -1), "block") != 0) break;

330 lua_pop(L, 1);

331 if (remaining >= 0 && len) {

332 remaining -= len;

333 lua_pushinteger(L, remaining);

334 lua_replace(L, 3);

335 }

336 lua_pushvalue(L, 2);

337 lua_callk(L, 0, 0, ctx, moonbr_io_read_cont);

338 }

339 if (ctx == 1) {

340 lua_pushvalue(L, 5);

341 } else {

342 luaL_Buffer buf;

343 lua_Integer i, chunkcount;

344 chunkcount = lua_rawlen(L, 5);

345 luaL_buffinit(L, &buf);

346 for (i=1; i<=chunkcount && i>0; i++) {

347 lua_rawgeti(L, 5, i);

348 luaL_addvalue(&buf);

349 }

350 luaL_pushresult(&buf);

351 }

352 lua_pushvalue(L, -2);

353 return 2;

354 }

355

356 static int moonbr_io_read_call(lua_State *L) {

357 lua_settop(L, 4);

358 lua_pushnil(L);

359 #if LUA_VERSION_NUM >= 503

360 return moonbr_io_read_cont(L, 0, 0);

361 #else

362 return moonbr_io_read_cont(L);

363 #endif

364 }

365

366 moonbr_io_yield_wrapper(moonbr_io_read_yield, moonbr_io_read_call);

367

368 #if LUA_VERSION_NUM >= 503

369 static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {

370 #else

371 static int moonbr_io_drain_cont(lua_State *L) {

372 #endif

373 lua_Integer remaining, len;

374 size_t totallen = 0;

375 #if !(LUA_VERSION_NUM >= 503)

376 int ctx = 0;

377 lua_getctx(L, &ctx);

378 #endif

379 remaining = lua_tointeger(L, 3);

380 while (1) {

381 lua_pushcfunction(L, moonbr_io_drain_nb);

382 lua_pushvalue(L, 1);

383 lua_pushvalue(L, 3);

384 lua_pushvalue(L, 4);

385 lua_call(L, 3, 2);

386 if (lua_isnil(L, -2)) return 2;

387 lua_insert(L, -2);

388 len = lua_tointeger(L, -1);

389 lua_pop(L, 1);

390 totallen += len;

391 if (strcmp(lua_tostring(L, -1), "block") != 0) break;

392 lua_pop(L, 1);

393 if (remaining >= 0 && len) {

394 remaining -= len;

395 lua_pushinteger(L, remaining);

396 lua_replace(L, 3);

397 }

398 lua_pushvalue(L, 2);

399 lua_callk(L, 0, 0, ctx, moonbr_io_drain_cont);

400 }

401 lua_pushinteger(L, totallen);

402 lua_pushvalue(L, -2);

403 return 2;

404 }

405

406 static int moonbr_io_drain_call(lua_State *L) {

407 #if LUA_VERSION_NUM >= 503

408 return moonbr_io_drain_cont(L, 0, 0);

409 #else

410 return moonbr_io_drain_cont(L);

411 #endif

412 }

413

414 moonbr_io_yield_wrapper(moonbr_io_drain_yield, moonbr_io_drain_call);

415

416 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {

417 moonbr_io_handle_t *handle;

418 int i, top;

419 const char *str;

420 size_t strlen;

421 ssize_t written;

422 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

423 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");

424 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");

425 if (handle->writeerr) {

426 lua_pushnil(L);

427 lua_pushliteral(L, "Previous write error");

428 return 2;

429 }

430 handle->writeerr = 1;

431 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);

432 top = lua_gettop(L);

433 lua_getuservalue(L, 1);

434 lua_getfield(L, -1, "writequeue");

435 for (i=2; i<=top; i++) {

436 luaL_checklstring(L, i, &strlen);

437 lua_pushvalue(L, i);

438 lua_rawseti(L, -2, handle->writeqin++);

439 handle->writeleft += strlen;

440 }

441 if (flush) handle->flushedleft = handle->writeleft;

442 while (handle->writeqout != handle->writeqin) {

443 lua_rawgeti(L, -1, handle->writeqout);

444 str = lua_tolstring(L, -1, &strlen);

445 while (handle->writeqoff < strlen) {

446 if (

447 strlen - handle->writeqoff <

448 MOONBR_IO_WRITEBUFLEN - handle->writebufin

449 ) {

450 memcpy(

451 handle->writebuf + handle->writebufin,

452 str + handle->writeqoff,

453 strlen - handle->writeqoff

454 );

455 handle->writebufin += strlen - handle->writeqoff;

456 break;

457 } else {

458 memcpy(

459 handle->writebuf + handle->writebufin,

460 str + handle->writeqoff,

461 MOONBR_IO_WRITEBUFLEN - handle->writebufin

462 );

463 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;

464 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {

465 moonbr_io_handle_set_nopush(L, handle, 1);

466 written = write(

467 handle->fd,

468 handle->writebuf + handle->writebufout,

469 MOONBR_IO_WRITEBUFLEN - handle->writebufout

470 );

471 if (written < 0) {

472 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {

473 goto moonbr_io_write_impl_block;

474 } else if (errno != EINTR) {

475 moonbr_io_errmsg();

476 lua_pushnil(L);

477 lua_pushstring(L, errmsg);

478 return 2;

479 }

480 } else {

481 handle->writebufout += written;

482 handle->writeleft -= written;

483 if (handle->flushedleft) {

484 if (written >= handle->flushedleft) {

485 handle->flushedleft = 0;

486 moonbr_io_handle_set_nopush(L, handle, 0);

487 } else {

488 handle->flushedleft -= written;

489 }

490 }

491 }

492 }

493 handle->writebufin = 0;

494 handle->writebufout = 0;

495 }

496 }

497 handle->writeqoff = 0;

498 lua_pop(L, 1);

499 lua_pushnil(L);

500 lua_rawseti(L, -2, handle->writeqout++);

501 }

502 while (handle->flushedleft) {

503 moonbr_io_handle_set_nopush(L, handle, 1);

504 written = write(

505 handle->fd,

506 handle->writebuf + handle->writebufout,

507 handle->writebufin - handle->writebufout

508 );

509 if (written < 0) {

510 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {

511 goto moonbr_io_write_impl_block;

512 } else if (errno != EINTR) {

513 moonbr_io_errmsg();

514 lua_pushnil(L);

515 lua_pushstring(L, errmsg);

516 return 2;

517 }

518 } else {

519 handle->writebufout += written;

520 handle->writeleft -= written;

521 if (handle->flushedleft) {

522 if (written >= handle->flushedleft) {

523 handle->flushedleft = 0;

524 moonbr_io_handle_set_nopush(L, handle, 0);

525 } else {

526 handle->flushedleft -= written;

527 }

528 }

529 }

530 }

531 if (handle->writebufout == handle->writebufin) {

532 handle->writebufin = 0;

533 handle->writebufout = 0;

534 }

535 if (nonblocking) lua_pushinteger(L, 0);

536 else lua_pushvalue(L, 1);

537 handle->writeerr = 0;

538 return 1;

539 moonbr_io_write_impl_block:

540 lua_pushinteger(L, handle->writeleft);

541 handle->writeerr = 0;

542 return 1;

543 }

544

545 static int moonbr_io_write(lua_State *L) {

546 return moonbr_io_write_impl(L, 0, 0);

547 }

548

549 static int moonbr_io_write_nb(lua_State *L) {

550 return moonbr_io_write_impl(L, 1, 0);

551 }

552

553 static int moonbr_io_flush(lua_State *L) {

554 return moonbr_io_write_impl(L, 0, 1);

555 }

556

557 static int moonbr_io_flush_nb(lua_State *L) {

558 return moonbr_io_write_impl(L, 1, 1);

559 }

560

561 #if LUA_VERSION_NUM >= 503

562 static int moonbr_io_write_cont(lua_State *L, int status, lua_KContext ctx) {

563 #else

564 static int moonbr_io_write_cont(lua_State *L) {

565 #endif

566 while (1) {

567 lua_pushcfunction(L, moonbr_io_write_nb);

568 lua_pushvalue(L, 1);

569 lua_call(L, 1, 2);

570 if (lua_isnil(L, -2)) return 2;

571 if (!lua_tointeger(L, -2)) {

572 lua_pushvalue(L, 1);

573 return 1;

574 }

575 lua_pop(L, 2);

576 lua_pushvalue(L, 2);

577 lua_callk(L, 0, 0, 0, moonbr_io_write_cont);

578 }

579 }

580

581 static int moonbr_io_write_call(lua_State *L) {

582 lua_pushcfunction(L, moonbr_io_write_nb);

583 lua_insert(L, 3);

584 lua_pushvalue(L, 1);

585 lua_insert(L, 4);

586 lua_call(L, lua_gettop(L) - 3, 2);

587 if (lua_isnil(L, -2)) return 2;

588 if (!lua_tointeger(L, -2)) {

589 lua_pushvalue(L, 1);

590 return 1;

591 }

592 #if LUA_VERSION_NUM >= 503

593 return moonbr_io_write_cont(L, 0, 0);

594 #else

595 return moonbr_io_write_cont(L);

596 #endif

597 }

598

599 moonbr_io_yield_wrapper(moonbr_io_write_yield, moonbr_io_write_call);

600

601 static int moonbr_io_flush_call(lua_State *L) {

602 lua_pushcfunction(L, moonbr_io_flush_nb);

603 lua_insert(L, 3);

604 lua_pushvalue(L, 1);

605 lua_insert(L, 4);

606 lua_call(L, lua_gettop(L) - 3, 2);

607 if (lua_isnil(L, -2)) return 2;

608 if (!lua_tointeger(L, -2)) {

609 lua_pushvalue(L, 1);

610 return 1;

611 }

612 #if LUA_VERSION_NUM >= 503

613 return moonbr_io_write_cont(L, 0, 0);

614 #else

615 return moonbr_io_write_cont(L);

616 #endif

617 }

618

619 moonbr_io_yield_wrapper(moonbr_io_flush_yield, moonbr_io_flush_call);

620

621 static int moonbr_io_finish(lua_State *L) {

622 moonbr_io_handle_t *handle;

623 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

624 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");

625 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");

626 if (handle->writeleft) {

627 lua_pushcfunction(L, moonbr_io_flush);

628 lua_pushvalue(L, 1);

629 if (lua_pcall(L, 1, 2, 0)) {

630 handle->finished = 1;

631 lua_error(L);

632 }

633 if (!lua_toboolean(L, -2)) {

634 handle->finished = 1;

635 return 2;

636 }

637 }

638 handle->finished = 1;

639 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {

640 if (shutdown(handle->fd, SHUT_WR)) {

641 moonbr_io_errmsg();

642 lua_pushnil(L);

643 lua_pushstring(L, errmsg);

644 return 2;

645 }

646 } else {

647 if (close(handle->fd)) {

648 moonbr_io_errmsg();

649 handle->fd = -1;

650 lua_pushnil(L);

651 lua_pushstring(L, errmsg);

652 return 2;

653 }

654 handle->fd = -1; /* fake EOF on read */

655 }

656 lua_pushboolean(L, 1);

657 return 1;

658 }

659

660 static int moonbr_io_close_impl(lua_State *L, int reset) {

661 moonbr_io_handle_t *handle;

662 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

663 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");

664 if (!reset) {

665 if (handle->writeleft) {

666 lua_pushcfunction(L, moonbr_io_flush);

667 lua_pushvalue(L, 1);

668 if (lua_pcall(L, 1, 2, 0)) {

669 handle->closed = 1;

670 close(handle->fd);

671 handle->fd = -1;

672 lua_error(L);

673 }

674 handle->closed = 1;

675 if (!lua_toboolean(L, -2)) {

676 close(handle->fd);

677 handle->fd = -1;

678 return 2;

679 }

680 } else {

681 handle->closed = 1;

682 moonbr_io_handle_set_linger(L, handle, -1);

683 }

684 } else {

685 handle->closed = 1;

686 }

687 if (handle->fd >= 0) {

688 if (close(handle->fd)) {

689 moonbr_io_errmsg();

690 handle->fd = -1;

691 lua_pushnil(L);

692 lua_pushstring(L, errmsg);

693 return 2;

694 }

695 handle->fd = -1;

696 }

697 lua_pushboolean(L, 1);

698 return 1;

699

700 }

701

702 static int moonbr_io_close(lua_State *L) {

703 return moonbr_io_close_impl(L, 0);

704 }

705

706 static int moonbr_io_reset(lua_State *L) {

707 return moonbr_io_close_impl(L, 1);

708 }

709

710 static int moonbr_io_handlegc(lua_State *L) {

711 moonbr_io_handle_t *handle;

712 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

713 if (handle->fd >= 0) {

714 lua_pushcfunction(L, moonbr_io_close);

715 lua_pushvalue(L, 1);

716 lua_pushinteger(L, 0);

717 lua_call(L, 2, 0);

718 }

719 return 0;

720 }

721

722 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {

723 moonbr_io_handle_t *handle;

724 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);

725 if (!handle->closed) {

726 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);

727 lua_pushvalue(L, idx < 0 ? idx-1 : idx);

728 lua_call(L, 1, 0);

729 }

730 }

731

732 void moonbr_io_pushhandle(lua_State *L, int fd) {

733 moonbr_io_handle_t *handle;

734 struct sockaddr addr;

735 socklen_t addrlen;

736 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));

737 handle->fd = fd;

738 addrlen = sizeof(addr);

739 if (getsockname(fd, &addr, &addrlen)) {

740 if (errno != ENOTSOCK) {

741 moonbr_io_errmsg();

742 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);

743 }

744 handle->issock = 0;

745 } else {

746 handle->issock = 1;

747 handle->addrfam = addr.sa_family;

748 }

749 handle->finished = 0;

750 handle->closed = 0;

751 handle->nonblocking = -1;

752 handle->nopush = -1;

753 handle->readerr = 0;

754 handle->readbufin = 0;

755 handle->readbufout = 0;

756 handle->writeerr = 0;

757 handle->writeleft = 0;

758 handle->flushedleft = 0;

759 handle->writeqin = 0;

760 handle->writeqout = 0;

761 handle->writeqoff = 0;

762 handle->writebufin = 0;

763 handle->writebufout = 0;

764 moonbr_io_handle_set_linger(L, handle, 0);

765 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);

766 lua_setmetatable(L, -2);

767 lua_newtable(L); // uservalue

768 lua_newtable(L);

769 lua_setfield(L, -2, "writequeue");

770 lua_newtable(L); // public

771 if (handle->addrfam == AF_INET6) {

772 struct sockaddr_in6 addr_in6;

773 char addrstrbuf[INET6_ADDRSTRLEN];

774 const char *addrstr;

775 addrlen = sizeof(addr_in6);

776 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {

777 moonbr_io_errmsg();

778 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);

779 }

780 if (addrlen > sizeof(addr_in6)) {

781 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");

782 }

783 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));

784 if (!addrstr) {

785 moonbr_io_errmsg();

786 luaL_error(L, "Could not format local IP address: %s", errmsg);

787 } else {

788 lua_pushstring(L, addrstr);

789 lua_setfield(L, -2, "local_ip6");

790 }

791 lua_pushinteger(L, ntohs(addr_in6.sin6_port));

792 lua_setfield(L, -2, "local_tcpport");

793 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {

794 moonbr_io_errmsg();

795 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);

796 }

797 if (addrlen > sizeof(addr_in6)) {

798 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");

799 }

800 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));

801 if (!addrstr) {

802 moonbr_io_errmsg();

803 luaL_error(L, "Could not format remote IP address: %s", errmsg);

804 } else {

805 lua_pushstring(L, addrstr);

806 lua_setfield(L, -2, "remote_ip6");

807 }

808 lua_pushinteger(L, ntohs(addr_in6.sin6_port));

809 lua_setfield(L, -2, "remote_tcpport");

810 } else if (handle->addrfam == AF_INET) {

811 struct sockaddr_in addr_in;

812 char addrstrbuf[INET_ADDRSTRLEN];

813 const char *addrstr;

814 addrlen = sizeof(addr_in);

815 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {

816 moonbr_io_errmsg();

817 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);

818 }

819 if (addrlen > sizeof(addr_in)) {

820 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");

821 }

822 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));

823 if (!addrstr) {

824 moonbr_io_errmsg();

825 luaL_error(L, "Could not format local IP address: %s", errmsg);

826 } else {

827 lua_pushstring(L, addrstr);

828 lua_setfield(L, -2, "local_ip4");

829 }

830 lua_pushinteger(L, ntohs(addr_in.sin_port));

831 lua_setfield(L, -2, "local_tcpport");

832 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {

833 moonbr_io_errmsg();

834 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);

835 }

836 if (addrlen > sizeof(addr_in)) {

837 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");

838 }

839 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));

840 if (!addrstr) {

841 moonbr_io_errmsg();

842 luaL_error(L, "Could not format remote IP address: %s", errmsg);

843 } else {

844 lua_pushstring(L, addrstr);

845 lua_setfield(L, -2, "remote_ip4");

846 }

847 lua_pushinteger(L, ntohs(addr_in.sin_port));

848 lua_setfield(L, -2, "remote_tcpport");

849 }

850 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);

851 lua_setmetatable(L, -2);

852 lua_setfield(L, -2, "public");

853 lua_setuservalue(L, -2);

854 }

855

856 static int moonbr_io_handleindex(lua_State *L) {

857 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

858 lua_getuservalue(L, 1);

859 lua_getfield(L, -1, "public");

860 lua_pushvalue(L, 2);

861 lua_gettable(L, -2);

862 return 1;

863 }

864

865 static int moonbr_io_handlenewindex(lua_State *L) {

866 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);

867 lua_getuservalue(L, 1);

868 lua_getfield(L, -1, "public");

869 lua_pushvalue(L, 2);

870 lua_pushvalue(L, 3);

871 lua_settable(L, -3);

872 return 0;

873 }

874

875 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {

876 const char *path;

877 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };

878 const int path_maxlen = sizeof(struct sockaddr_un) - (

879 (void *)sockaddr.sun_path - (void *)&sockaddr

880 ) - 1; /* one byte for termination */

881 int sock;

882 path = luaL_checkstring(L, 1);

883 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);

884 strcpy(sockaddr.sun_path, path);

885 sock = socket(

886 PF_LOCAL,

887 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),

888 0

889 );

890 if (sock < 0) {

891 moonbr_io_errmsg();

892 lua_pushnil(L);

893 lua_pushstring(L, errmsg);

894 return 2;

895 }

896 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {

897 if (!nonblocking && errno == EINTR) {

898 moonbr_io_errmsg();

899 close(sock);

900 lua_pushnil(L);

901 lua_pushstring(L, errmsg);

902 return 2;

903 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {

904 moonbr_io_errmsg();

905 lua_pushnil(L);

906 lua_pushstring(L, errmsg);

907 return 2;

908 }

909 }

910 moonbr_io_pushhandle(L, sock);

911 return 1;

912 }

913

914 static int moonbr_io_localconnect(lua_State *L) {

915 return moonbr_io_localconnect_impl(L, 0);

916 }

917

918 static int moonbr_io_localconnect_nb(lua_State *L) {

919 return moonbr_io_localconnect_impl(L, 1);

920 }

921

922 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {

923 const char *host, *port;

924 struct addrinfo hints = { 0, };

925 struct addrinfo *res, *addrinfo;

926 int errcode;

927 int sock;

928 host = luaL_checkstring(L, 1);

929 port = luaL_checkstring(L, 2);

930 hints.ai_family = AF_UNSPEC;

931 hints.ai_socktype = SOCK_STREAM;

932 hints.ai_protocol = IPPROTO_TCP;

933 hints.ai_flags = AI_ADDRCONFIG;

934 errcode = getaddrinfo(host, port, &hints, &res);

935 if (errcode) {

936 freeaddrinfo(res);

937 if (errcode == EAI_SYSTEM) {

938 moonbr_io_errmsg();

939 lua_pushnil(L);

940 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);

941 } else {

942 lua_pushnil(L);

943 lua_pushstring(L, gai_strerror(errcode));

944 }

945 return 2;

946 }

947 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {

948 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;

949 }

950 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {

951 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;

952 }

953 addrinfo = res;

954 moonbr_io_tcpconnect_found:

955 sock = socket(

956 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */

957 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),

958 addrinfo->ai_protocol

959 );

960 if (sock < 0) {

961 moonbr_io_errmsg();

962 freeaddrinfo(res);

963 lua_pushnil(L);

964 lua_pushstring(L, errmsg);

965 return 2;

966 }

967 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {

968 freeaddrinfo(res);

969 if (!nonblocking && errno == EINTR) {

970 moonbr_io_errmsg();

971 close(sock);

972 lua_pushnil(L);

973 lua_pushstring(L, errmsg);

974 return 2;

975 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {

976 moonbr_io_errmsg();

977 lua_pushnil(L);

978 lua_pushstring(L, errmsg);

979 return 2;

980 }

981 } else {

982 freeaddrinfo(res);

983 }

984 moonbr_io_pushhandle(L, sock);

985 return 1;

986 }

987

988 static int moonbr_io_tcpconnect(lua_State *L) {

989 return moonbr_io_tcpconnect_impl(L, 0);

990 }

991

992 static int moonbr_io_tcpconnect_nb(lua_State *L) {

993 return moonbr_io_tcpconnect_impl(L, 1);

994 }

995

996 static int moonbr_io_locallisten(lua_State *L) {

997 moonbr_io_listener_t *listener;

998 const char *path;

999 struct stat sb;

1000 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };

1001 const int path_maxlen = sizeof(struct sockaddr_un) - (

1002 (void *)sockaddr.sun_path - (void *)&sockaddr

1003 ) - 1; /* one byte for termination */

1004 int sock;

1005 path = luaL_checkstring(L, 1);

1006 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);

1007 strcpy(sockaddr.sun_path, path);

1008 if (stat(path, &sb) == 0) {

1009 if (S_ISSOCK(sb.st_mode)) unlink(path);

1010 }

1011 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));

1012 listener->fd = -1;

1013 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);

1014 sock = socket(

1015 PF_LOCAL,

1016 SOCK_STREAM | SOCK_CLOEXEC,

1017 0

1018 );

1019 if (sock < 0) {

1020 moonbr_io_errmsg();

1021 lua_pushnil(L);

1022 lua_pushstring(L, errmsg);

1023 return 2;

1024 }

1025 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {

1026 moonbr_io_errmsg();

1027 close(sock);

1028 lua_pushnil(L);

1029 lua_pushstring(L, errmsg);

1030 return 2;

1031 }

1032 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {

1033 moonbr_io_errmsg();

1034 close(sock);

1035 lua_pushnil(L);

1036 lua_pushstring(L, errmsg);

1037 return 2;

1038 }

1039 listener->fd = sock;

1040 listener->addrfam = AF_LOCAL;

1041 listener->nonblocking = -1;

1042 return 1;

1043 }

1044

1045 static int moonbr_io_tcplisten(lua_State *L) {

1046 moonbr_io_listener_t *listener;

1047 const char *host, *port;

1048 struct addrinfo hints = { 0, };

1049 struct addrinfo *res, *addrinfo;

1050 int errcode;

1051 int sock;

1052 host = luaL_optstring(L, 1, NULL);

1053 port = luaL_checkstring(L, 2);

1054 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));

1055 listener->fd = -1;

1056 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);

1057 hints.ai_family = AF_UNSPEC;

1058 hints.ai_socktype = SOCK_STREAM;

1059 hints.ai_protocol = IPPROTO_TCP;

1060 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;

1061 errcode = getaddrinfo(host, port, &hints, &res);

1062 if (errcode) {

1063 freeaddrinfo(res);

1064 if (errcode == EAI_SYSTEM) {

1065 moonbr_io_errmsg();

1066 lua_pushnil(L);

1067 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);

1068 } else {

1069 lua_pushnil(L);

1070 lua_pushstring(L, gai_strerror(errcode));

1071 }

1072 return 2;

1073 }

1074 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {

1075 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;

1076 }

1077 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {

1078 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;

1079 }

1080 addrinfo = res;

1081 moonbr_io_tcpconnect_found:

1082 listener->addrfam = addrinfo->ai_family;

1083 sock = socket(

1084 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */

1085 addrinfo->ai_socktype | SOCK_CLOEXEC,

1086 addrinfo->ai_protocol

1087 );

1088 if (sock < 0) {

1089 moonbr_io_errmsg();

1090 freeaddrinfo(res);

1091 lua_pushnil(L);

1092 lua_pushstring(L, errmsg);

1093 return 2;

1094 }

1095 {

1096 static const int reuseval = 1;

1097 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {

1098 moonbr_io_errmsg();

1099 freeaddrinfo(res);

1100 close(sock);

1101 lua_pushnil(L);

1102 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);

1103 return 2;

1104 }

1105 }

1106 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {

1107 moonbr_io_errmsg();

1108 freeaddrinfo(res);

1109 close(sock);

1110 lua_pushnil(L);

1111 lua_pushstring(L, errmsg);

1112 return 2;

1113 }

1114 freeaddrinfo(res);

1115 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {

1116 moonbr_io_errmsg();

1117 close(sock);

1118 lua_pushnil(L);

1119 lua_pushstring(L, errmsg);

1120 return 2;

1121 }

1122 listener->fd = sock;

1123 listener->nonblocking = -1;

1124 return 1;

1125 }

1126

1127 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {

1128 moonbr_io_listener_t *listener;

1129 int fd;

1130 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);

1131 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");

1132 if (listener->nonblocking != nonblocking) {

1133 int flags;

1134 flags = fcntl(listener->fd, F_GETFL, 0);

1135 if (flags == -1) {

1136 moonbr_io_errmsg();

1137 close(listener->fd);

1138 listener->fd = -1;

1139 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);

1140 }

1141 if (nonblocking) flags |= O_NONBLOCK;

1142 else flags &= ~O_NONBLOCK;

1143 if (fcntl(listener->fd, F_SETFL, flags) == -1) {

1144 moonbr_io_errmsg();

1145 close(listener->fd);

1146 listener->fd = -1;

1147 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);

1148 }

1149 listener->nonblocking = nonblocking;

1150 }

1151 while (1) {

1152 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);

1153 if (fd < 0) {

1154 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {

1155 lua_pushboolean(L, 0);

1156 lua_pushliteral(L, "No incoming connection pending");

1157 return 2;

1158 } else if (errno != EINTR) {

1159 moonbr_io_errmsg();

1160 lua_pushnil(L);

1161 lua_pushstring(L, errmsg);

1162 return 2;

1163 }

1164 } else {

1165 moonbr_io_pushhandle(L, fd);

1166 return 1;

1167 }

1168 }

1169 }

1170

1171 static int moonbr_io_accept(lua_State *L) {

1172 return moonbr_io_accept_impl(L, 0);

1173 }

1174

1175 static int moonbr_io_accept_nb(lua_State *L) {

1176 return moonbr_io_accept_impl(L, 1);

1177 }

1178

1179 static int moonbr_io_unlisten(lua_State *L) {

1180 moonbr_io_listener_t *listener;

1181 struct sockaddr_un addr;

1182 socklen_t addrlen;

1183 struct stat sb;

1184 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);

1185 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");

1186 addrlen = sizeof(addr);

1187 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;

1188 if (close(listener->fd)) {

1189 moonbr_io_errmsg();

1190 listener->fd = -1;

1191 if (addrlen && addrlen <= sizeof(addr)) {

1192 if (stat(addr.sun_path, &sb) == 0) {

1193 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);

1194 }

1195 }

1196 lua_pushnil(L);

1197 lua_pushstring(L, errmsg);

1198 return 2;

1199 }

1200 listener->fd = -1;

1201 if (addrlen && addrlen <= sizeof(addr)) {

1202 if (stat(addr.sun_path, &sb) == 0) {

1203 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);

1204 }

1205 }

1206 lua_pushboolean(L, 1);

1207 return 1;

1208 }

1209

1210 static int moonbr_io_listenergc(lua_State *L) {

1211 moonbr_io_listener_t *listener;

1212 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);

1213 if (listener->fd >= 0) close(listener->fd);

1214 listener->fd = -1;

1215 return 0;

1216 }

1217

1218 static int moonbr_io_poll(lua_State *L) {

1219 moonbr_io_handle_t *handle;

1220 moonbr_io_listener_t *listener;

1221 int fd, isnum;

1222 int nfds = 0;

1223 fd_set readfds, writefds, exceptfds;

1224 struct timeval timeout = {0, };

1225 int status;

1226 FD_ZERO(&readfds);

1227 FD_ZERO(&writefds);

1228 FD_ZERO(&exceptfds);

1229 if (!lua_isnoneornil(L, 1)) {

1230 luaL_checktype(L, 1, LUA_TTABLE);

1231 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {

1232 if (lua_toboolean(L, -1)) {

1233 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);

1234 if (handle) {

1235 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");

1236 fd = handle->fd;

1237 if (

1238 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */

1239 handle->readbufin != handle->readbufout /* data pending in buffer */

1240 ) {

1241 lua_pushboolean(L, 1);

1242 return 1;

1243 }

1244 } else {

1245 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);

1246 if (listener) {

1247 fd = listener->fd;

1248 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");

1249 } else {

1250 fd = lua_tointegerx(L, -2, &isnum);

1251 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");

1252 }

1253 }

1254 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");

1255 FD_SET(fd, &readfds);

1256 if (fd+1 > nfds) nfds = fd+1;

1257 }

1258 }

1259 }

1260 if (!lua_isnoneornil(L, 2)) {

1261 luaL_checktype(L, 2, LUA_TTABLE);

1262 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {

1263 if (lua_toboolean(L, -1)) {

1264 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);

1265 if (handle) {

1266 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");

1267 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");

1268 fd = handle->fd;

1269 } else {

1270 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);

1271 if (listener) luaL_error(L, "Attempt to write-poll a listener");

1272 fd = lua_tointegerx(L, -2, &isnum);

1273 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");

1274 }

1275 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");

1276 FD_SET(fd, &writefds);

1277 if (fd+1 > nfds) nfds = fd+1;

1278 }

1279 }

1280 }

1281 if (!lua_isnoneornil(L, 3)) {

1282 lua_Number n;

1283 n = lua_tonumberx(L, 3, &isnum);

1284 if (isnum && n<0) {

1285 lua_pushboolean(L, 0);

1286 lua_pushliteral(L, "Negative timeout");

1287 return 2;

1288 } else if (isnum && n>=0 && n<100000000) {

1289 timeout.tv_sec = n;

1290 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);

1291 } else {

1292 luaL_argcheck(L, 0, 3, "not a valid timeout");

1293 }

1294 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);

1295 } else {

1296 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);

1297 }

1298 if (status == -1) {

1299 if (errno == EINTR) {

1300 lua_pushnil(L);

1301 lua_pushliteral(L, "Signal received while polling file descriptors");

1302 return 2;

1303 } else {

1304 moonbr_io_errmsg();

1305 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);

1306 }

1307 } else if (status == 0) {

1308 lua_pushboolean(L, 0);

1309 lua_pushliteral(L, "Timeout while polling file descriptors");

1310 return 2;

1311 } else {

1312 lua_pushboolean(L, 1);

1313 return 1;

1314 }

1315 }

1316

1317 static int moonbr_io_timeref(lua_State *L) {

1318 lua_Number sub;

1319 struct timespec tp;

1320 sub = luaL_optnumber(L, 1, 0);

1321 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {

1322 return luaL_error(L, "Could not access CLOCK_MONOTONIC");

1323 }

1324 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);

1325 return 1;

1326 }

1327

1328 static const struct luaL_Reg moonbr_io_handle_methods[] = {

1329 {"read", moonbr_io_read},

1330 {"read_nb", moonbr_io_read_nb},

1331 {"read_call", moonbr_io_read_call},

1332 {"read_yield", moonbr_io_read_yield},

1333 {"drain", moonbr_io_drain},

1334 {"drain_nb", moonbr_io_drain_nb},

1335 {"drain_call", moonbr_io_drain_call},

1336 {"drain_yield", moonbr_io_drain_yield},

1337 {"write", moonbr_io_write},

1338 {"write_nb", moonbr_io_write_nb},

1339 {"write_call", moonbr_io_write_call},

1340 {"write_yield", moonbr_io_write_yield},

1341 {"flush", moonbr_io_flush},

1342 {"flush_nb", moonbr_io_flush_nb},

1343 {"flush_call", moonbr_io_flush_call},

1344 {"flush_yield", moonbr_io_flush_yield},

1345 {"finish", moonbr_io_finish},

1346 {"close", moonbr_io_close},

1347 {"reset", moonbr_io_reset},

1348 {NULL, NULL}

1349 };

1350

1351 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {

1352 {"__index", moonbr_io_handleindex},

1353 {"__newindex", moonbr_io_handlenewindex},

1354 {"__gc", moonbr_io_handlegc},

1355 {NULL, NULL}

1356 };

1357

1358 static const struct luaL_Reg moonbr_io_listener_methods[] = {

1359 {"accept", moonbr_io_accept},

1360 {"accept_nb", moonbr_io_accept_nb},

1361 {"close", moonbr_io_unlisten},

1362 {NULL, NULL}

1363 };

1364

1365 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {

1366 {"__gc", moonbr_io_listenergc},

1367 {NULL, NULL}

1368 };

1369

1370 static const struct luaL_Reg moonbr_io_module_funcs[] = {

1371 {"localconnect", moonbr_io_localconnect},

1372 {"localconnect_nb", moonbr_io_localconnect_nb},

1373 {"tcpconnect", moonbr_io_tcpconnect},

1374 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},

1375 {"locallisten", moonbr_io_locallisten},

1376 {"tcplisten", moonbr_io_tcplisten},

1377 {"poll", moonbr_io_poll},

1378 {"timeref", moonbr_io_timeref},

1379 {NULL, NULL}

1380 };

1381

1382 int luaopen_moonbridge_io(lua_State *L) {

1383

1384 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */

1385

1386 lua_newtable(L); // module

1387

1388 lua_newtable(L); // public metatable

1389 lua_newtable(L); // handle methods

1390 luaL_setfuncs(L, moonbr_io_handle_methods, 0);

1391 lua_pushvalue(L, -1);

1392 lua_setfield(L, -4, "handle_pt");

1393 lua_setfield(L, -2, "__index");

1394 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);

1395

1396 lua_newtable(L); // handle metatable

1397 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);

1398 lua_pushvalue(L, -1);

1399 lua_setfield(L, -3, "handle_mt");

1400 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);

1401

1402 lua_newtable(L); // listener metatable

1403 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);

1404 lua_newtable(L); // listener methods

1405 luaL_setfuncs(L, moonbr_io_listener_methods, 0);

1406 lua_pushvalue(L, -1);

1407 lua_setfield(L, -4, "listener_pt");

1408 lua_setfield(L, -2, "__index");

1409 lua_pushvalue(L, -1);

1410 lua_setfield(L, -3, "listener_mt");

1411 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);

1412

1413 luaL_setfuncs(L, moonbr_io_module_funcs, 0);

1414 return 1;

1415

1416 }

1417