moonbridge

annotate moonbridge_io.c @ 104:5e8eeb5b6c84

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Some code cleanup in I/O library
author jbe
date Wed Apr 08 18:38:14 2015 +0200 (2015-04-08)
parents 4f9e4c6109f4
children 11d03470ef19
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@104 99 #elif defined(TCP_CORK)
jbe@104 100 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 101 #endif
jbe@96 102 moonbr_io_errmsg();
jbe@96 103 close(handle->fd);
jbe@96 104 handle->fd = -1;
jbe@96 105 handle->closed = 1;
jbe@104 106 #if defined(TCP_NOPUSH)
jbe@96 107 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 108 #elif defined(TCP_CORK)
jbe@95 109 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 110 #endif
jbe@95 111 }
jbe@95 112 handle->nopush = nopush;
jbe@96 113 #else
jbe@96 114 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 115 #endif
jbe@95 116 }
jbe@95 117
jbe@86 118 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 119 moonbr_io_handle_t *handle;
jbe@85 120 lua_Integer maxread;
jbe@85 121 const char *terminatorstr;
jbe@85 122 size_t terminatorlen;
jbe@85 123 char terminator;
jbe@85 124 luaL_Buffer luabuf;
jbe@85 125 size_t luabufcnt = 0;
jbe@86 126 int endcnt;
jbe@85 127 char *terminatorpos;
jbe@103 128 ssize_t bytesread;
jbe@85 129 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 130 maxread = luaL_optinteger(L, 2, 0);
jbe@85 131 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 132 if (terminatorlen) {
jbe@85 133 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 134 terminator = terminatorstr[0];
jbe@85 135 }
jbe@86 136 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 137 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 138 if (handle->readerr) {
jbe@85 139 lua_pushnil(L);
jbe@85 140 lua_pushliteral(L, "Previous read error");
jbe@85 141 return 2;
jbe@85 142 }
jbe@104 143 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@104 144 handle->readerr = 1;
jbe@85 145 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 146 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 147 while (1) {
jbe@86 148 endcnt = -1;
jbe@104 149 if (maxread > 0 && handle->readbufcnt >= (size_t)maxread - luabufcnt) {
jbe@86 150 endcnt = maxread - luabufcnt;
jbe@85 151 } else if (terminatorlen) {
jbe@85 152 terminatorpos = memchr(handle->readbuf, terminator, handle->readbufcnt);
jbe@86 153 if (terminatorpos) endcnt = 1 + (terminatorpos - handle->readbuf);
jbe@85 154 }
jbe@86 155 if (endcnt >= 0) {
jbe@86 156 if (!drain) {
jbe@86 157 luaL_addlstring(&luabuf, handle->readbuf, endcnt);
jbe@86 158 luaL_pushresult(&luabuf);
jbe@90 159 } else {
jbe@90 160 luabufcnt += handle->readbufcnt;
jbe@90 161 lua_pushinteger(L, luabufcnt);
jbe@86 162 }
jbe@86 163 handle->readbufcnt -= endcnt;
jbe@86 164 memmove(handle->readbuf, handle->readbuf + endcnt, handle->readbufcnt);
jbe@104 165 handle->readerr = 0;
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 lua_pushnil(L);
jbe@85 178 lua_pushstring(L, errmsg);
jbe@85 179 return 2;
jbe@85 180 }
jbe@103 181 handle->readbufcnt += bytesread;
jbe@85 182 }
jbe@86 183 if (!drain) {
jbe@86 184 luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@86 185 luaL_pushresult(&luabuf);
jbe@86 186 }
jbe@90 187 luabufcnt += handle->readbufcnt;
jbe@85 188 handle->readbufcnt = 0;
jbe@90 189 if (!drain) {
jbe@103 190 if (!luabufcnt && bytesread == 0) {
jbe@104 191 handle->readerr = 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@104 201 handle->readerr = 0;
jbe@85 202 return 1;
jbe@85 203 }
jbe@85 204
jbe@85 205 static int moonbr_io_read(lua_State *L) {
jbe@86 206 return moonbr_io_read_impl(L, 0, 0);
jbe@85 207 }
jbe@85 208
jbe@85 209 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 210 return moonbr_io_read_impl(L, 1, 0);
jbe@86 211 }
jbe@86 212
jbe@86 213 static int moonbr_io_drain(lua_State *L) {
jbe@86 214 return moonbr_io_read_impl(L, 0, 1);
jbe@86 215 }
jbe@86 216
jbe@86 217 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 218 return moonbr_io_read_impl(L, 1, 1);
jbe@85 219 }
jbe@85 220
jbe@81 221 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 222 moonbr_io_handle_t *handle;
jbe@80 223 int i, top;
jbe@80 224 const char *str;
jbe@92 225 size_t strlen;
jbe@103 226 ssize_t written;
jbe@80 227 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 228 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 229 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 230 if (handle->writeerr) {
jbe@80 231 lua_pushnil(L);
jbe@80 232 lua_pushliteral(L, "Previous write error");
jbe@80 233 return 2;
jbe@80 234 }
jbe@103 235 handle->writeerr = 1;
jbe@81 236 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 237 top = lua_gettop(L);
jbe@81 238 lua_getuservalue(L, 1);
jbe@103 239 lua_getfield(L, -1, "writequeue");
jbe@84 240 for (i=2; i<=top; i++) {
jbe@84 241 luaL_checklstring(L, i, &strlen);
jbe@84 242 lua_pushvalue(L, i);
jbe@84 243 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 244 handle->writeleft += strlen;
jbe@81 245 }
jbe@83 246 while (handle->writeqout != handle->writeqin) {
jbe@83 247 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 248 str = lua_tolstring(L, -1, &strlen);
jbe@92 249 while (handle->writeqoff < strlen) {
jbe@103 250 if (
jbe@103 251 strlen - handle->writeqoff <=
jbe@103 252 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 253 ) {
jbe@103 254 memcpy(
jbe@103 255 handle->writebuf + handle->writebufin,
jbe@103 256 str + handle->writeqoff,
jbe@103 257 strlen - handle->writeqoff
jbe@103 258 );
jbe@103 259 handle->writebufin += strlen - handle->writeqoff;
jbe@80 260 break;
jbe@80 261 } else {
jbe@97 262 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 263 memcpy(
jbe@103 264 handle->writebuf + handle->writebufin,
jbe@103 265 str + handle->writeqoff,
jbe@103 266 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 267 );
jbe@103 268 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 269 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@103 270 written = write(
jbe@103 271 handle->fd,
jbe@103 272 handle->writebuf + handle->writebufout,
jbe@103 273 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 274 );
jbe@103 275 if (written < 0) {
jbe@81 276 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 277 goto moonbr_io_write_impl_block;
jbe@81 278 } else if (errno != EINTR) {
jbe@80 279 moonbr_io_errmsg();
jbe@80 280 lua_pushnil(L);
jbe@80 281 lua_pushstring(L, errmsg);
jbe@80 282 return 2;
jbe@80 283 }
jbe@103 284 } else {
jbe@103 285 handle->writebufout += written;
jbe@103 286 handle->writeleft -= written;
jbe@80 287 }
jbe@80 288 }
jbe@103 289 handle->writebufin = 0;
jbe@103 290 handle->writebufout = 0;
jbe@80 291 }
jbe@80 292 }
jbe@81 293 handle->writeqoff = 0;
jbe@81 294 lua_pop(L, 1);
jbe@81 295 lua_pushnil(L);
jbe@83 296 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 297 }
jbe@81 298 if (flush) {
jbe@97 299 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@103 300 while (handle->writebufout < handle->writebufin) {
jbe@103 301 written = write(
jbe@103 302 handle->fd,
jbe@103 303 handle->writebuf + handle->writebufout,
jbe@103 304 handle->writebufin - handle->writebufout
jbe@103 305 );
jbe@103 306 if (written < 0) {
jbe@81 307 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 308 goto moonbr_io_write_impl_block;
jbe@81 309 } else if (errno != EINTR) {
jbe@81 310 moonbr_io_errmsg();
jbe@81 311 lua_pushnil(L);
jbe@81 312 lua_pushstring(L, errmsg);
jbe@81 313 return 2;
jbe@81 314 }
jbe@81 315 } else {
jbe@103 316 handle->writebufout += written;
jbe@103 317 handle->writeleft -= written;
jbe@81 318 }
jbe@81 319 }
jbe@103 320 handle->writebufin = 0;
jbe@103 321 handle->writebufout = 0;
jbe@81 322 }
jbe@103 323 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 324 else lua_pushvalue(L, 1);
jbe@103 325 handle->writeerr = 0;
jbe@80 326 return 1;
jbe@81 327 moonbr_io_write_impl_block:
jbe@91 328 lua_pushinteger(L, handle->writeleft);
jbe@103 329 handle->writeerr = 0;
jbe@81 330 return 1;
jbe@81 331 }
jbe@81 332
jbe@81 333 static int moonbr_io_write(lua_State *L) {
jbe@81 334 return moonbr_io_write_impl(L, 0, 0);
jbe@81 335 }
jbe@81 336
jbe@81 337 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 338 return moonbr_io_write_impl(L, 1, 0);
jbe@80 339 }
jbe@80 340
jbe@80 341 static int moonbr_io_flush(lua_State *L) {
jbe@81 342 return moonbr_io_write_impl(L, 0, 1);
jbe@81 343 }
jbe@81 344
jbe@81 345 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 346 return moonbr_io_write_impl(L, 1, 1);
jbe@80 347 }
jbe@80 348
jbe@88 349 static int moonbr_io_finish(lua_State *L) {
jbe@88 350 moonbr_io_handle_t *handle;
jbe@88 351 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 352 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 353 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 354 if (handle->writeleft) {
jbe@94 355 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 356 lua_pushvalue(L, 1);
jbe@94 357 lua_call(L, 1, 2);
jbe@94 358 if (!lua_toboolean(L, -2)) {
jbe@94 359 handle->finished = 1;
jbe@94 360 return 2;
jbe@88 361 }
jbe@94 362 }
jbe@94 363 handle->finished = 1;
jbe@95 364 if (handle->isnetwork) {
jbe@88 365 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 366 moonbr_io_errmsg();
jbe@88 367 lua_pushnil(L);
jbe@88 368 lua_pushstring(L, errmsg);
jbe@88 369 return 2;
jbe@88 370 }
jbe@94 371 } else {
jbe@94 372 if (close(handle->fd)) {
jbe@94 373 moonbr_io_errmsg();
jbe@94 374 handle->fd = -1;
jbe@94 375 lua_pushnil(L);
jbe@94 376 lua_pushstring(L, errmsg);
jbe@94 377 return 2;
jbe@94 378 }
jbe@94 379 handle->fd = -1; /* fake EOF on read */
jbe@88 380 }
jbe@88 381 lua_pushboolean(L, 1);
jbe@88 382 return 1;
jbe@88 383 }
jbe@88 384
jbe@94 385 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 386 moonbr_io_handle_t *handle;
jbe@83 387 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 388 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 389 if (!reset) {
jbe@87 390 if (handle->writeleft) {
jbe@87 391 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 392 lua_pushvalue(L, 1);
jbe@87 393 lua_call(L, 1, 2);
jbe@87 394 if (!lua_toboolean(L, -2)) {
jbe@87 395 close(handle->fd);
jbe@87 396 handle->fd = -1;
jbe@87 397 return 2;
jbe@87 398 }
jbe@83 399 }
jbe@94 400 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 401 }
jbe@94 402 if (handle->fd >= 0) {
jbe@94 403 if (close(handle->fd)) {
jbe@94 404 moonbr_io_errmsg();
jbe@94 405 handle->fd = -1;
jbe@94 406 lua_pushnil(L);
jbe@94 407 lua_pushstring(L, errmsg);
jbe@94 408 return 2;
jbe@94 409 }
jbe@104 410 handle->fd = -1;
jbe@83 411 }
jbe@83 412 lua_pushboolean(L, 1);
jbe@83 413 return 1;
jbe@84 414
jbe@83 415 }
jbe@83 416
jbe@94 417 static int moonbr_io_close(lua_State *L) {
jbe@94 418 return moonbr_io_close_impl(L, 0);
jbe@94 419 }
jbe@94 420
jbe@84 421 static int moonbr_io_reset(lua_State *L) {
jbe@94 422 return moonbr_io_close_impl(L, 1);
jbe@84 423 }
jbe@84 424
jbe@88 425 static int moonbr_io_gc(lua_State *L) {
jbe@88 426 moonbr_io_handle_t *handle;
jbe@88 427 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 428 if (handle->fd >= 0) {
jbe@88 429 lua_pushcfunction(L, moonbr_io_close);
jbe@88 430 lua_pushvalue(L, 1);
jbe@88 431 lua_pushinteger(L, 0);
jbe@88 432 lua_call(L, 2, 0);
jbe@88 433 }
jbe@88 434 return 0;
jbe@88 435 }
jbe@88 436
jbe@100 437 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 438 moonbr_io_handle_t *handle;
jbe@88 439 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 440 if (!handle->closed) {
jbe@100 441 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 442 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 443 lua_call(L, 1, 0);
jbe@88 444 }
jbe@88 445 }
jbe@88 446
jbe@95 447 void moonbr_io_pushhandle(lua_State *L, int fd, int isnetwork) {
jbe@79 448 moonbr_io_handle_t *handle;
jbe@79 449 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 450 handle->fd = fd;
jbe@95 451 handle->isnetwork = isnetwork;
jbe@94 452 handle->finished = 0;
jbe@94 453 handle->closed = 0;
jbe@81 454 handle->nonblocking = -1;
jbe@95 455 handle->nopush = -1;
jbe@85 456 handle->readerr = 0;
jbe@85 457 handle->readbufcnt = 0;
jbe@81 458 handle->writeerr = 0;
jbe@81 459 handle->writeleft = 0;
jbe@83 460 handle->writeqin = 0;
jbe@83 461 handle->writeqout = 0;
jbe@81 462 handle->writeqoff = 0;
jbe@103 463 handle->writebufin = 0;
jbe@103 464 handle->writebufout = 0;
jbe@87 465 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 466 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 467 lua_setmetatable(L, -2);
jbe@79 468 lua_newtable(L); // uservalue
jbe@81 469 lua_newtable(L);
jbe@103 470 lua_setfield(L, -2, "writequeue");
jbe@79 471 lua_newtable(L); // public
jbe@79 472 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 473 lua_setmetatable(L, -2);
jbe@79 474 lua_setfield(L, -2, "public");
jbe@79 475 lua_setuservalue(L, -2);
jbe@79 476 }
jbe@79 477
jbe@79 478 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 479 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 480 lua_getuservalue(L, 1);
jbe@79 481 lua_getfield(L, -1, "public");
jbe@79 482 lua_pushvalue(L, 2);
jbe@79 483 lua_gettable(L, -2);
jbe@79 484 return 1;
jbe@79 485 }
jbe@79 486
jbe@79 487 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 488 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 489 lua_getuservalue(L, 1);
jbe@79 490 lua_getfield(L, -1, "public");
jbe@79 491 lua_pushvalue(L, 2);
jbe@79 492 lua_pushvalue(L, 3);
jbe@79 493 lua_settable(L, -3);
jbe@79 494 return 0;
jbe@79 495 }
jbe@79 496
jbe@99 497 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 498 const char *host, *port;
jbe@98 499 struct addrinfo hints = { 0, };
jbe@98 500 struct addrinfo *res, *addrinfo;
jbe@98 501 int errcode;
jbe@98 502 int sock;
jbe@98 503 host = luaL_checkstring(L, 1);
jbe@98 504 port = luaL_checkstring(L, 2);
jbe@98 505 hints.ai_family = AF_UNSPEC;
jbe@98 506 hints.ai_socktype = SOCK_STREAM;
jbe@98 507 hints.ai_protocol = IPPROTO_TCP;
jbe@98 508 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 509 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 510 if (errcode) {
jbe@102 511 freeaddrinfo(res);
jbe@98 512 if (errcode == EAI_SYSTEM) {
jbe@98 513 moonbr_io_errmsg();
jbe@98 514 lua_pushnil(L);
jbe@98 515 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 516 } else {
jbe@98 517 lua_pushnil(L);
jbe@98 518 lua_pushstring(L, gai_strerror(errcode));
jbe@98 519 }
jbe@98 520 return 2;
jbe@98 521 }
jbe@98 522 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 523 if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 524 }
jbe@98 525 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 526 if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 527 }
jbe@98 528 addrinfo = res;
jbe@98 529 moonbr_io_tcpconnect_found:
jbe@99 530 sock = socket(
jbe@99 531 addrinfo->ai_family,
jbe@99 532 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 533 addrinfo->ai_protocol
jbe@99 534 );
jbe@102 535 freeaddrinfo(res);
jbe@98 536 if (sock < 0) {
jbe@98 537 moonbr_io_errmsg();
jbe@98 538 lua_pushnil(L);
jbe@98 539 lua_pushstring(L, errmsg);
jbe@98 540 }
jbe@98 541 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@99 542 if (!nonblocking && errno == EINTR) {
jbe@99 543 moonbr_io_errmsg();
jbe@99 544 close(sock);
jbe@99 545 lua_pushnil(L);
jbe@99 546 lua_pushstring(L, errmsg);
jbe@99 547 return 2;
jbe@99 548 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 549 moonbr_io_errmsg();
jbe@99 550 lua_pushnil(L);
jbe@99 551 lua_pushstring(L, errmsg);
jbe@99 552 return 2;
jbe@99 553 }
jbe@98 554 }
jbe@98 555 moonbr_io_pushhandle(L, sock, 1);
jbe@98 556 return 1;
jbe@98 557 }
jbe@98 558
jbe@99 559 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 560 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 561 }
jbe@99 562
jbe@99 563 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 564 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 565 }
jbe@99 566
jbe@79 567 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 568 {"read", moonbr_io_read},
jbe@85 569 {"read_nb", moonbr_io_read_nb},
jbe@86 570 {"drain", moonbr_io_drain},
jbe@86 571 {"drain_nb", moonbr_io_drain_nb},
jbe@80 572 {"write", moonbr_io_write},
jbe@81 573 {"write_nb", moonbr_io_write_nb},
jbe@80 574 {"flush", moonbr_io_flush},
jbe@81 575 {"flush_nb", moonbr_io_flush_nb},
jbe@88 576 {"finish", moonbr_io_finish},
jbe@87 577 {"close", moonbr_io_close},
jbe@85 578 {"reset", moonbr_io_reset},
jbe@79 579 {NULL, NULL}
jbe@79 580 };
jbe@79 581
jbe@79 582 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 583 {"__index", moonbr_io_handleindex},
jbe@79 584 {"__newindex", moonbr_io_handlenewindex},
jbe@88 585 {"__gc", moonbr_io_gc},
jbe@79 586 {NULL, NULL}
jbe@79 587 };
jbe@79 588
jbe@79 589 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@98 590 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 591 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@79 592 {NULL, NULL}
jbe@79 593 };
jbe@79 594
jbe@79 595 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 596
jbe@80 597 lua_newtable(L); // module
jbe@80 598
jbe@79 599 lua_newtable(L); // public metatable
jbe@79 600 lua_newtable(L); // handle methods
jbe@79 601 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 602 lua_pushvalue(L, -1);
jbe@80 603 lua_setfield(L, -4, "handle");
jbe@79 604 lua_setfield(L, -2, "__index");
jbe@79 605 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 606
jbe@79 607 lua_newtable(L); // handle metatable
jbe@79 608 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 609 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 610
jbe@79 611 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 612 return 1;
jbe@79 613
jbe@79 614 }
jbe@79 615

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