moonbridge

annotate moonbridge_io.c @ 103:4f9e4c6109f4

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Different buffering model for I/O writer
author jbe
date Wed Apr 08 17:43:31 2015 +0200 (2015-04-08)
parents 51ff6ad11677
children 5e8eeb5b6c84
rev   line source
jbe@79 1
jbe@79 2 #include <stdlib.h>
jbe@79 3 #include <unistd.h>
jbe@79 4 #include <stdint.h>
jbe@79 5 #include <errno.h>
jbe@79 6 #include <string.h>
jbe@79 7 #include <sys/socket.h>
jbe@79 8 #include <sys/select.h>
jbe@81 9 #include <fcntl.h>
jbe@95 10 #include <netinet/in.h>
jbe@95 11 #include <netinet/tcp.h>
jbe@98 12 #include <sys/types.h>
jbe@98 13 #include <netdb.h>
jbe@79 14
jbe@79 15 #include <lua.h>
jbe@79 16 #include <lauxlib.h>
jbe@79 17 #include <lualib.h>
jbe@79 18
jbe@80 19 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 20 #define MOONBR_IO_READBUFLEN 4096
jbe@80 21 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 22
jbe@80 23 #define moonbr_io_errmsg() \
jbe@80 24 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 25 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 26
jbe@79 27 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 28 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@79 29
jbe@79 30 typedef struct {
jbe@79 31 int fd;
jbe@95 32 int isnetwork;
jbe@94 33 int finished;
jbe@94 34 int closed;
jbe@81 35 int nonblocking;
jbe@95 36 int nopush;
jbe@85 37 int readerr;
jbe@85 38 int readbufcnt;
jbe@81 39 int writeerr;
jbe@83 40 size_t writeleft;
jbe@83 41 #if LUA_VERSION_NUM >= 503
jbe@83 42 lua_Integer writeqin;
jbe@83 43 lua_Integer writeqout;
jbe@83 44 #else
jbe@83 45 int writeqin;
jbe@83 46 int writeqout;
jbe@83 47 #endif
jbe@83 48 size_t writeqoff;
jbe@103 49 int writebufin;
jbe@103 50 int writebufout;
jbe@85 51 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 52 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 53 } moonbr_io_handle_t;
jbe@79 54
jbe@81 55 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 56 int flags;
jbe@95 57 if (handle->nonblocking == nonblocking) return;
jbe@95 58 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 59 if (flags == -1) {
jbe@95 60 moonbr_io_errmsg();
jbe@96 61 close(handle->fd);
jbe@96 62 handle->fd = -1;
jbe@96 63 handle->closed = 1;
jbe@95 64 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 65 }
jbe@95 66 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 67 else flags &= ~O_NONBLOCK;
jbe@95 68 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 69 moonbr_io_errmsg();
jbe@96 70 close(handle->fd);
jbe@96 71 handle->fd = -1;
jbe@96 72 handle->closed = 1;
jbe@95 73 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 74 }
jbe@95 75 handle->nonblocking = nonblocking;
jbe@81 76 }
jbe@81 77
jbe@87 78 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 79 struct linger lingerval = { 0, };
jbe@95 80 if (!handle->isnetwork) return;
jbe@87 81 if (timeout >= 0) {
jbe@87 82 lingerval.l_onoff = 1;
jbe@87 83 lingerval.l_linger = timeout;
jbe@87 84 }
jbe@87 85 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 86 moonbr_io_errmsg();
jbe@96 87 close(handle->fd);
jbe@96 88 handle->fd = -1;
jbe@96 89 handle->closed = 1;
jbe@95 90 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 91 }
jbe@87 92 }
jbe@87 93
jbe@95 94 static void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 95 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@95 96 if (!handle->isnetwork || handle->nopush == nopush) return;
jbe@96 97 #if defined(TCP_NOPUSH)
jbe@96 98 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@96 99 moonbr_io_errmsg();
jbe@96 100 close(handle->fd);
jbe@96 101 handle->fd = -1;
jbe@96 102 handle->closed = 1;
jbe@96 103 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 104 }
jbe@96 105 #elif defined(TCP_CORK)
jbe@95 106 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@95 107 moonbr_io_errmsg();
jbe@96 108 close(handle->fd);
jbe@96 109 handle->fd = -1;
jbe@96 110 handle->closed = 1;
jbe@95 111 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@95 112 }
jbe@95 113 #endif
jbe@95 114 handle->nopush = nopush;
jbe@96 115 #else
jbe@96 116 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 117 #endif
jbe@95 118 }
jbe@95 119
jbe@86 120 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 121 moonbr_io_handle_t *handle;
jbe@85 122 lua_Integer maxread;
jbe@85 123 const char *terminatorstr;
jbe@85 124 size_t terminatorlen;
jbe@85 125 char terminator;
jbe@85 126 luaL_Buffer luabuf;
jbe@85 127 size_t luabufcnt = 0;
jbe@86 128 int endcnt;
jbe@85 129 char *terminatorpos;
jbe@103 130 ssize_t bytesread;
jbe@85 131 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 132 maxread = luaL_optinteger(L, 2, 0);
jbe@85 133 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 134 if (terminatorlen) {
jbe@85 135 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 136 terminator = terminatorstr[0];
jbe@85 137 }
jbe@86 138 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 139 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@94 140 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@85 141 if (handle->readerr) {
jbe@85 142 lua_pushnil(L);
jbe@85 143 lua_pushliteral(L, "Previous read error");
jbe@85 144 return 2;
jbe@85 145 }
jbe@85 146 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 147 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 148 while (1) {
jbe@86 149 endcnt = -1;
jbe@85 150 if (maxread > 0 && handle->readbufcnt >= maxread - luabufcnt) {
jbe@86 151 endcnt = maxread - luabufcnt;
jbe@85 152 } else if (terminatorlen) {
jbe@85 153 terminatorpos = memchr(handle->readbuf, terminator, handle->readbufcnt);
jbe@86 154 if (terminatorpos) endcnt = 1 + (terminatorpos - handle->readbuf);
jbe@85 155 }
jbe@86 156 if (endcnt >= 0) {
jbe@86 157 if (!drain) {
jbe@86 158 luaL_addlstring(&luabuf, handle->readbuf, endcnt);
jbe@86 159 luaL_pushresult(&luabuf);
jbe@90 160 } else {
jbe@90 161 luabufcnt += handle->readbufcnt;
jbe@90 162 lua_pushinteger(L, luabufcnt);
jbe@86 163 }
jbe@86 164 handle->readbufcnt -= endcnt;
jbe@86 165 memmove(handle->readbuf, handle->readbuf + endcnt, handle->readbufcnt);
jbe@85 166 return 1;
jbe@85 167 }
jbe@86 168 if (!drain) luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@85 169 luabufcnt += handle->readbufcnt;
jbe@85 170 handle->readbufcnt = 0;
jbe@85 171 do {
jbe@103 172 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 173 } while (bytesread < 0 && (errno == EINTR));
jbe@103 174 if (bytesread == 0 || (nonblocking && bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))) break;
jbe@103 175 if (bytesread < 0) {
jbe@85 176 moonbr_io_errmsg();
jbe@85 177 handle->readerr = 1;
jbe@85 178 lua_pushnil(L);
jbe@85 179 lua_pushstring(L, errmsg);
jbe@85 180 return 2;
jbe@85 181 }
jbe@103 182 handle->readbufcnt += bytesread;
jbe@85 183 }
jbe@86 184 if (!drain) {
jbe@86 185 luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@86 186 luaL_pushresult(&luabuf);
jbe@86 187 }
jbe@90 188 luabufcnt += handle->readbufcnt;
jbe@85 189 handle->readbufcnt = 0;
jbe@90 190 if (!drain) {
jbe@103 191 if (!luabufcnt && bytesread == 0) {
jbe@94 192 moonbr_io_read_impl_eof:
jbe@90 193 lua_pushboolean(L, 0);
jbe@90 194 lua_pushliteral(L, "End of file");
jbe@90 195 return 2;
jbe@90 196 }
jbe@90 197 } else {
jbe@103 198 if (!luabufcnt && bytesread == 0) lua_pushboolean(L, 1);
jbe@90 199 else lua_pushboolean(L, luabufcnt);
jbe@90 200 }
jbe@85 201 return 1;
jbe@85 202 }
jbe@85 203
jbe@85 204 static int moonbr_io_read(lua_State *L) {
jbe@86 205 return moonbr_io_read_impl(L, 0, 0);
jbe@85 206 }
jbe@85 207
jbe@85 208 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 209 return moonbr_io_read_impl(L, 1, 0);
jbe@86 210 }
jbe@86 211
jbe@86 212 static int moonbr_io_drain(lua_State *L) {
jbe@86 213 return moonbr_io_read_impl(L, 0, 1);
jbe@86 214 }
jbe@86 215
jbe@86 216 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 217 return moonbr_io_read_impl(L, 1, 1);
jbe@85 218 }
jbe@85 219
jbe@81 220 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 221 moonbr_io_handle_t *handle;
jbe@80 222 int i, top;
jbe@80 223 const char *str;
jbe@92 224 size_t strlen;
jbe@103 225 ssize_t written;
jbe@80 226 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 227 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 228 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 229 if (handle->writeerr) {
jbe@80 230 lua_pushnil(L);
jbe@80 231 lua_pushliteral(L, "Previous write error");
jbe@80 232 return 2;
jbe@80 233 }
jbe@103 234 handle->writeerr = 1;
jbe@81 235 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 236 top = lua_gettop(L);
jbe@81 237 lua_getuservalue(L, 1);
jbe@103 238 lua_getfield(L, -1, "writequeue");
jbe@84 239 for (i=2; i<=top; i++) {
jbe@84 240 luaL_checklstring(L, i, &strlen);
jbe@84 241 lua_pushvalue(L, i);
jbe@84 242 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 243 handle->writeleft += strlen;
jbe@81 244 }
jbe@83 245 while (handle->writeqout != handle->writeqin) {
jbe@83 246 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 247 str = lua_tolstring(L, -1, &strlen);
jbe@92 248 while (handle->writeqoff < strlen) {
jbe@103 249 if (
jbe@103 250 strlen - handle->writeqoff <=
jbe@103 251 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 252 ) {
jbe@103 253 memcpy(
jbe@103 254 handle->writebuf + handle->writebufin,
jbe@103 255 str + handle->writeqoff,
jbe@103 256 strlen - handle->writeqoff
jbe@103 257 );
jbe@103 258 handle->writebufin += strlen - handle->writeqoff;
jbe@80 259 break;
jbe@80 260 } else {
jbe@97 261 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 262 memcpy(
jbe@103 263 handle->writebuf + handle->writebufin,
jbe@103 264 str + handle->writeqoff,
jbe@103 265 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 266 );
jbe@103 267 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 268 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@103 269 written = write(
jbe@103 270 handle->fd,
jbe@103 271 handle->writebuf + handle->writebufout,
jbe@103 272 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 273 );
jbe@103 274 if (written < 0) {
jbe@81 275 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 276 goto moonbr_io_write_impl_block;
jbe@81 277 } else if (errno != EINTR) {
jbe@80 278 moonbr_io_errmsg();
jbe@80 279 lua_pushnil(L);
jbe@80 280 lua_pushstring(L, errmsg);
jbe@80 281 return 2;
jbe@80 282 }
jbe@103 283 } else {
jbe@103 284 handle->writebufout += written;
jbe@103 285 handle->writeleft -= written;
jbe@80 286 }
jbe@80 287 }
jbe@103 288 handle->writebufin = 0;
jbe@103 289 handle->writebufout = 0;
jbe@80 290 }
jbe@80 291 }
jbe@81 292 handle->writeqoff = 0;
jbe@81 293 lua_pop(L, 1);
jbe@81 294 lua_pushnil(L);
jbe@83 295 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 296 }
jbe@81 297 if (flush) {
jbe@97 298 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@103 299 while (handle->writebufout < handle->writebufin) {
jbe@103 300 written = write(
jbe@103 301 handle->fd,
jbe@103 302 handle->writebuf + handle->writebufout,
jbe@103 303 handle->writebufin - handle->writebufout
jbe@103 304 );
jbe@103 305 if (written < 0) {
jbe@81 306 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 307 goto moonbr_io_write_impl_block;
jbe@81 308 } else if (errno != EINTR) {
jbe@81 309 moonbr_io_errmsg();
jbe@81 310 lua_pushnil(L);
jbe@81 311 lua_pushstring(L, errmsg);
jbe@81 312 return 2;
jbe@81 313 }
jbe@81 314 } else {
jbe@103 315 handle->writebufout += written;
jbe@103 316 handle->writeleft -= written;
jbe@81 317 }
jbe@81 318 }
jbe@103 319 handle->writebufin = 0;
jbe@103 320 handle->writebufout = 0;
jbe@81 321 }
jbe@103 322 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 323 else lua_pushvalue(L, 1);
jbe@103 324 handle->writeerr = 0;
jbe@80 325 return 1;
jbe@81 326 moonbr_io_write_impl_block:
jbe@91 327 lua_pushinteger(L, handle->writeleft);
jbe@103 328 handle->writeerr = 0;
jbe@81 329 return 1;
jbe@81 330 }
jbe@81 331
jbe@81 332 static int moonbr_io_write(lua_State *L) {
jbe@81 333 return moonbr_io_write_impl(L, 0, 0);
jbe@81 334 }
jbe@81 335
jbe@81 336 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 337 return moonbr_io_write_impl(L, 1, 0);
jbe@80 338 }
jbe@80 339
jbe@80 340 static int moonbr_io_flush(lua_State *L) {
jbe@81 341 return moonbr_io_write_impl(L, 0, 1);
jbe@81 342 }
jbe@81 343
jbe@81 344 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 345 return moonbr_io_write_impl(L, 1, 1);
jbe@80 346 }
jbe@80 347
jbe@88 348 static int moonbr_io_finish(lua_State *L) {
jbe@88 349 moonbr_io_handle_t *handle;
jbe@88 350 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 351 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 352 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 353 if (handle->writeleft) {
jbe@94 354 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 355 lua_pushvalue(L, 1);
jbe@94 356 lua_call(L, 1, 2);
jbe@94 357 if (!lua_toboolean(L, -2)) {
jbe@94 358 handle->finished = 1;
jbe@94 359 return 2;
jbe@88 360 }
jbe@94 361 }
jbe@94 362 handle->finished = 1;
jbe@95 363 if (handle->isnetwork) {
jbe@88 364 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 365 moonbr_io_errmsg();
jbe@88 366 lua_pushnil(L);
jbe@88 367 lua_pushstring(L, errmsg);
jbe@88 368 return 2;
jbe@88 369 }
jbe@94 370 } else {
jbe@94 371 if (close(handle->fd)) {
jbe@94 372 moonbr_io_errmsg();
jbe@94 373 handle->fd = -1;
jbe@94 374 lua_pushnil(L);
jbe@94 375 lua_pushstring(L, errmsg);
jbe@94 376 return 2;
jbe@94 377 }
jbe@94 378 handle->fd = -1; /* fake EOF on read */
jbe@88 379 }
jbe@88 380 lua_pushboolean(L, 1);
jbe@88 381 return 1;
jbe@88 382 }
jbe@88 383
jbe@94 384 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 385 moonbr_io_handle_t *handle;
jbe@83 386 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 387 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 388 if (!reset) {
jbe@87 389 if (handle->writeleft) {
jbe@87 390 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 391 lua_pushvalue(L, 1);
jbe@87 392 lua_call(L, 1, 2);
jbe@87 393 if (!lua_toboolean(L, -2)) {
jbe@87 394 close(handle->fd);
jbe@87 395 handle->fd = -1;
jbe@87 396 return 2;
jbe@87 397 }
jbe@83 398 }
jbe@94 399 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 400 }
jbe@94 401 if (handle->fd >= 0) {
jbe@94 402 if (close(handle->fd)) {
jbe@94 403 moonbr_io_errmsg();
jbe@94 404 handle->fd = -1;
jbe@94 405 lua_pushnil(L);
jbe@94 406 lua_pushstring(L, errmsg);
jbe@94 407 return 2;
jbe@94 408 }
jbe@83 409 }
jbe@83 410 handle->fd = -1;
jbe@83 411 lua_pushboolean(L, 1);
jbe@83 412 return 1;
jbe@84 413
jbe@83 414 }
jbe@83 415
jbe@94 416 static int moonbr_io_close(lua_State *L) {
jbe@94 417 return moonbr_io_close_impl(L, 0);
jbe@94 418 }
jbe@94 419
jbe@84 420 static int moonbr_io_reset(lua_State *L) {
jbe@94 421 return moonbr_io_close_impl(L, 1);
jbe@84 422 }
jbe@84 423
jbe@88 424 static int moonbr_io_gc(lua_State *L) {
jbe@88 425 moonbr_io_handle_t *handle;
jbe@88 426 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 427 if (handle->fd >= 0) {
jbe@88 428 lua_pushcfunction(L, moonbr_io_close);
jbe@88 429 lua_pushvalue(L, 1);
jbe@88 430 lua_pushinteger(L, 0);
jbe@88 431 lua_call(L, 2, 0);
jbe@88 432 }
jbe@88 433 return 0;
jbe@88 434 }
jbe@88 435
jbe@100 436 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 437 moonbr_io_handle_t *handle;
jbe@88 438 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 439 if (!handle->closed) {
jbe@100 440 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 441 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 442 lua_call(L, 1, 0);
jbe@88 443 }
jbe@88 444 }
jbe@88 445
jbe@95 446 void moonbr_io_pushhandle(lua_State *L, int fd, int isnetwork) {
jbe@79 447 moonbr_io_handle_t *handle;
jbe@79 448 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 449 handle->fd = fd;
jbe@95 450 handle->isnetwork = isnetwork;
jbe@94 451 handle->finished = 0;
jbe@94 452 handle->closed = 0;
jbe@81 453 handle->nonblocking = -1;
jbe@95 454 handle->nopush = -1;
jbe@85 455 handle->readerr = 0;
jbe@85 456 handle->readbufcnt = 0;
jbe@81 457 handle->writeerr = 0;
jbe@81 458 handle->writeleft = 0;
jbe@83 459 handle->writeqin = 0;
jbe@83 460 handle->writeqout = 0;
jbe@81 461 handle->writeqoff = 0;
jbe@103 462 handle->writebufin = 0;
jbe@103 463 handle->writebufout = 0;
jbe@87 464 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 465 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 466 lua_setmetatable(L, -2);
jbe@79 467 lua_newtable(L); // uservalue
jbe@81 468 lua_newtable(L);
jbe@103 469 lua_setfield(L, -2, "writequeue");
jbe@79 470 lua_newtable(L); // public
jbe@79 471 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 472 lua_setmetatable(L, -2);
jbe@79 473 lua_setfield(L, -2, "public");
jbe@79 474 lua_setuservalue(L, -2);
jbe@79 475 }
jbe@79 476
jbe@79 477 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 478 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 479 lua_getuservalue(L, 1);
jbe@79 480 lua_getfield(L, -1, "public");
jbe@79 481 lua_pushvalue(L, 2);
jbe@79 482 lua_gettable(L, -2);
jbe@79 483 return 1;
jbe@79 484 }
jbe@79 485
jbe@79 486 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 487 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 488 lua_getuservalue(L, 1);
jbe@79 489 lua_getfield(L, -1, "public");
jbe@79 490 lua_pushvalue(L, 2);
jbe@79 491 lua_pushvalue(L, 3);
jbe@79 492 lua_settable(L, -3);
jbe@79 493 return 0;
jbe@79 494 }
jbe@79 495
jbe@99 496 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 497 const char *host, *port;
jbe@98 498 struct addrinfo hints = { 0, };
jbe@98 499 struct addrinfo *res, *addrinfo;
jbe@98 500 int errcode;
jbe@98 501 int sock;
jbe@98 502 host = luaL_checkstring(L, 1);
jbe@98 503 port = luaL_checkstring(L, 2);
jbe@98 504 hints.ai_family = AF_UNSPEC;
jbe@98 505 hints.ai_socktype = SOCK_STREAM;
jbe@98 506 hints.ai_protocol = IPPROTO_TCP;
jbe@98 507 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 508 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 509 if (errcode) {
jbe@102 510 freeaddrinfo(res);
jbe@98 511 if (errcode == EAI_SYSTEM) {
jbe@98 512 moonbr_io_errmsg();
jbe@98 513 lua_pushnil(L);
jbe@98 514 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 515 } else {
jbe@98 516 lua_pushnil(L);
jbe@98 517 lua_pushstring(L, gai_strerror(errcode));
jbe@98 518 }
jbe@98 519 return 2;
jbe@98 520 }
jbe@98 521 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 522 if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 523 }
jbe@98 524 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 525 if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 526 }
jbe@98 527 addrinfo = res;
jbe@98 528 moonbr_io_tcpconnect_found:
jbe@99 529 sock = socket(
jbe@99 530 addrinfo->ai_family,
jbe@99 531 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 532 addrinfo->ai_protocol
jbe@99 533 );
jbe@102 534 freeaddrinfo(res);
jbe@98 535 if (sock < 0) {
jbe@98 536 moonbr_io_errmsg();
jbe@98 537 lua_pushnil(L);
jbe@98 538 lua_pushstring(L, errmsg);
jbe@98 539 }
jbe@98 540 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@99 541 if (!nonblocking && errno == EINTR) {
jbe@99 542 moonbr_io_errmsg();
jbe@99 543 close(sock);
jbe@99 544 lua_pushnil(L);
jbe@99 545 lua_pushstring(L, errmsg);
jbe@99 546 return 2;
jbe@99 547 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 548 moonbr_io_errmsg();
jbe@99 549 lua_pushnil(L);
jbe@99 550 lua_pushstring(L, errmsg);
jbe@99 551 return 2;
jbe@99 552 }
jbe@98 553 }
jbe@98 554 moonbr_io_pushhandle(L, sock, 1);
jbe@98 555 return 1;
jbe@98 556 }
jbe@98 557
jbe@99 558 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 559 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 560 }
jbe@99 561
jbe@99 562 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 563 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 564 }
jbe@99 565
jbe@79 566 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 567 {"read", moonbr_io_read},
jbe@85 568 {"read_nb", moonbr_io_read_nb},
jbe@86 569 {"drain", moonbr_io_drain},
jbe@86 570 {"drain_nb", moonbr_io_drain_nb},
jbe@80 571 {"write", moonbr_io_write},
jbe@81 572 {"write_nb", moonbr_io_write_nb},
jbe@80 573 {"flush", moonbr_io_flush},
jbe@81 574 {"flush_nb", moonbr_io_flush_nb},
jbe@88 575 {"finish", moonbr_io_finish},
jbe@87 576 {"close", moonbr_io_close},
jbe@85 577 {"reset", moonbr_io_reset},
jbe@79 578 {NULL, NULL}
jbe@79 579 };
jbe@79 580
jbe@79 581 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 582 {"__index", moonbr_io_handleindex},
jbe@79 583 {"__newindex", moonbr_io_handlenewindex},
jbe@88 584 {"__gc", moonbr_io_gc},
jbe@79 585 {NULL, NULL}
jbe@79 586 };
jbe@79 587
jbe@79 588 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@98 589 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 590 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@79 591 {NULL, NULL}
jbe@79 592 };
jbe@79 593
jbe@79 594 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 595
jbe@80 596 lua_newtable(L); // module
jbe@80 597
jbe@79 598 lua_newtable(L); // public metatable
jbe@79 599 lua_newtable(L); // handle methods
jbe@79 600 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 601 lua_pushvalue(L, -1);
jbe@80 602 lua_setfield(L, -4, "handle");
jbe@79 603 lua_setfield(L, -2, "__index");
jbe@79 604 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 605
jbe@79 606 lua_newtable(L); // handle metatable
jbe@79 607 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 608 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 609
jbe@79 610 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 611 return 1;
jbe@79 612
jbe@79 613 }
jbe@79 614

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