moonbridge

annotate moonbridge_io.c @ 129:df08e63dc44b

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Bugfix in close method of moonbridge_io (do not mark as closed before flushing)
author jbe
date Tue Apr 14 22:25:32 2015 +0200 (2015-04-14)
parents 3bbcd75eefcd
children 293e666a41e0
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@111 8 #include <sys/un.h>
jbe@79 9 #include <sys/select.h>
jbe@81 10 #include <fcntl.h>
jbe@95 11 #include <netinet/in.h>
jbe@95 12 #include <netinet/tcp.h>
jbe@107 13 #include <arpa/inet.h>
jbe@98 14 #include <sys/types.h>
jbe@118 15 #include <sys/stat.h>
jbe@98 16 #include <netdb.h>
jbe@113 17 #include <signal.h>
jbe@115 18 #include <time.h>
jbe@79 19
jbe@79 20 #include <lua.h>
jbe@79 21 #include <lauxlib.h>
jbe@79 22 #include <lualib.h>
jbe@79 23
jbe@80 24 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 25 #define MOONBR_IO_READBUFLEN 4096
jbe@80 26 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 27
jbe@108 28 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108 29
jbe@80 30 #define moonbr_io_errmsg() \
jbe@80 31 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 32 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 33
jbe@79 34 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 35 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108 36 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@79 37
jbe@79 38 typedef struct {
jbe@79 39 int fd;
jbe@107 40 int issock;
jbe@107 41 sa_family_t addrfam;
jbe@94 42 int finished;
jbe@94 43 int closed;
jbe@81 44 int nonblocking;
jbe@95 45 int nopush;
jbe@85 46 int readerr;
jbe@105 47 int readbufin;
jbe@105 48 int readbufout;
jbe@81 49 int writeerr;
jbe@83 50 size_t writeleft;
jbe@83 51 #if LUA_VERSION_NUM >= 503
jbe@83 52 lua_Integer writeqin;
jbe@83 53 lua_Integer writeqout;
jbe@83 54 #else
jbe@83 55 int writeqin;
jbe@83 56 int writeqout;
jbe@83 57 #endif
jbe@83 58 size_t writeqoff;
jbe@103 59 int writebufin;
jbe@103 60 int writebufout;
jbe@85 61 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 62 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 63 } moonbr_io_handle_t;
jbe@79 64
jbe@108 65 typedef struct {
jbe@108 66 int fd;
jbe@118 67 sa_family_t addrfam;
jbe@108 68 int nonblocking;
jbe@108 69 } moonbr_io_listener_t;
jbe@108 70
jbe@81 71 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 72 int flags;
jbe@95 73 if (handle->nonblocking == nonblocking) return;
jbe@95 74 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 75 if (flags == -1) {
jbe@95 76 moonbr_io_errmsg();
jbe@96 77 close(handle->fd);
jbe@96 78 handle->fd = -1;
jbe@96 79 handle->closed = 1;
jbe@95 80 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 81 }
jbe@95 82 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 83 else flags &= ~O_NONBLOCK;
jbe@95 84 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 85 moonbr_io_errmsg();
jbe@96 86 close(handle->fd);
jbe@96 87 handle->fd = -1;
jbe@96 88 handle->closed = 1;
jbe@95 89 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 90 }
jbe@95 91 handle->nonblocking = nonblocking;
jbe@81 92 }
jbe@81 93
jbe@87 94 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 95 struct linger lingerval = { 0, };
jbe@107 96 if (!handle->issock) return;
jbe@87 97 if (timeout >= 0) {
jbe@87 98 lingerval.l_onoff = 1;
jbe@87 99 lingerval.l_linger = timeout;
jbe@87 100 }
jbe@87 101 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 102 moonbr_io_errmsg();
jbe@96 103 close(handle->fd);
jbe@96 104 handle->fd = -1;
jbe@96 105 handle->closed = 1;
jbe@95 106 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 107 }
jbe@87 108 }
jbe@87 109
jbe@95 110 static void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 111 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 112 if (
jbe@107 113 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 114 handle->nopush == nopush
jbe@107 115 ) return;
jbe@96 116 #if defined(TCP_NOPUSH)
jbe@96 117 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 118 #elif defined(TCP_CORK)
jbe@104 119 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 120 #endif
jbe@96 121 moonbr_io_errmsg();
jbe@96 122 close(handle->fd);
jbe@96 123 handle->fd = -1;
jbe@96 124 handle->closed = 1;
jbe@104 125 #if defined(TCP_NOPUSH)
jbe@96 126 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 127 #elif defined(TCP_CORK)
jbe@95 128 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 129 #endif
jbe@95 130 }
jbe@95 131 handle->nopush = nopush;
jbe@96 132 #else
jbe@96 133 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 134 #endif
jbe@95 135 }
jbe@95 136
jbe@86 137 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 138 moonbr_io_handle_t *handle;
jbe@85 139 lua_Integer maxread;
jbe@85 140 const char *terminatorstr;
jbe@85 141 size_t terminatorlen;
jbe@85 142 char terminator;
jbe@85 143 luaL_Buffer luabuf;
jbe@85 144 size_t luabufcnt = 0;
jbe@105 145 int remaining;
jbe@85 146 char *terminatorpos;
jbe@103 147 ssize_t bytesread;
jbe@85 148 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 149 maxread = luaL_optinteger(L, 2, 0);
jbe@85 150 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 151 if (terminatorlen) {
jbe@85 152 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 153 terminator = terminatorstr[0];
jbe@85 154 }
jbe@86 155 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 156 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 157 if (handle->readerr) {
jbe@85 158 lua_pushnil(L);
jbe@85 159 lua_pushliteral(L, "Previous read error");
jbe@85 160 return 2;
jbe@85 161 }
jbe@105 162 handle->readerr = 1;
jbe@104 163 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@85 164 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 165 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 166 while (1) {
jbe@105 167 remaining = -1;
jbe@105 168 if (
jbe@105 169 maxread > 0 &&
jbe@105 170 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 171 ) {
jbe@105 172 remaining = maxread - luabufcnt;
jbe@85 173 } else if (terminatorlen) {
jbe@105 174 terminatorpos = memchr(
jbe@105 175 handle->readbuf + handle->readbufout,
jbe@105 176 terminator,
jbe@105 177 handle->readbufin - handle->readbufout
jbe@105 178 );
jbe@105 179 if (terminatorpos) remaining = 1 + (
jbe@105 180 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@105 181 );
jbe@85 182 }
jbe@105 183 if (remaining >= 0) {
jbe@86 184 if (!drain) {
jbe@105 185 luaL_addlstring(
jbe@105 186 &luabuf,
jbe@105 187 handle->readbuf + handle->readbufout,
jbe@105 188 remaining
jbe@105 189 );
jbe@86 190 luaL_pushresult(&luabuf);
jbe@90 191 } else {
jbe@105 192 luaL_pushresult(&luabuf);
jbe@105 193 lua_pop(L, 1);
jbe@105 194 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 195 }
jbe@105 196 handle->readbufout += remaining;
jbe@105 197 if (handle->readbufout == handle->readbufin) {
jbe@105 198 handle->readbufin = 0;
jbe@105 199 handle->readbufout =0;
jbe@105 200 }
jbe@104 201 handle->readerr = 0;
jbe@85 202 return 1;
jbe@85 203 }
jbe@105 204 if (!drain) luaL_addlstring(
jbe@105 205 &luabuf,
jbe@105 206 handle->readbuf + handle->readbufout,
jbe@105 207 handle->readbufin - handle->readbufout
jbe@105 208 );
jbe@105 209 luabufcnt += handle->readbufin - handle->readbufout;
jbe@85 210 do {
jbe@103 211 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 212 } while (bytesread < 0 && (errno == EINTR));
jbe@105 213 if (
jbe@105 214 bytesread == 0 || (
jbe@105 215 nonblocking &&
jbe@105 216 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 217 )
jbe@105 218 ) {
jbe@105 219 handle->readbufin = 0;
jbe@105 220 handle->readbufout = 0;
jbe@105 221 if (!drain) {
jbe@105 222 luaL_pushresult(&luabuf);
jbe@105 223 if (!luabufcnt && bytesread == 0) {
jbe@105 224 lua_pop(L, 1);
jbe@105 225 moonbr_io_read_impl_eof:
jbe@105 226 lua_pushboolean(L, 0);
jbe@105 227 lua_pushliteral(L, "End of file");
jbe@105 228 handle->readerr = 0;
jbe@105 229 return 2;
jbe@105 230 }
jbe@105 231 } else {
jbe@105 232 if (!luabufcnt && bytesread == 0) lua_pushboolean(L, 1);
jbe@105 233 else lua_pushboolean(L, luabufcnt);
jbe@105 234 }
jbe@105 235 handle->readerr = 0;
jbe@105 236 return 1;
jbe@105 237 }
jbe@103 238 if (bytesread < 0) {
jbe@85 239 moonbr_io_errmsg();
jbe@85 240 lua_pushnil(L);
jbe@85 241 lua_pushstring(L, errmsg);
jbe@85 242 return 2;
jbe@85 243 }
jbe@105 244 handle->readbufin = bytesread;
jbe@105 245 handle->readbufout = 0;
jbe@86 246 }
jbe@85 247 }
jbe@85 248
jbe@85 249 static int moonbr_io_read(lua_State *L) {
jbe@86 250 return moonbr_io_read_impl(L, 0, 0);
jbe@85 251 }
jbe@85 252
jbe@85 253 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 254 return moonbr_io_read_impl(L, 1, 0);
jbe@86 255 }
jbe@86 256
jbe@86 257 static int moonbr_io_drain(lua_State *L) {
jbe@86 258 return moonbr_io_read_impl(L, 0, 1);
jbe@86 259 }
jbe@86 260
jbe@86 261 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 262 return moonbr_io_read_impl(L, 1, 1);
jbe@85 263 }
jbe@85 264
jbe@81 265 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 266 moonbr_io_handle_t *handle;
jbe@80 267 int i, top;
jbe@80 268 const char *str;
jbe@92 269 size_t strlen;
jbe@103 270 ssize_t written;
jbe@80 271 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 272 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 273 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 274 if (handle->writeerr) {
jbe@80 275 lua_pushnil(L);
jbe@80 276 lua_pushliteral(L, "Previous write error");
jbe@80 277 return 2;
jbe@80 278 }
jbe@103 279 handle->writeerr = 1;
jbe@81 280 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 281 top = lua_gettop(L);
jbe@81 282 lua_getuservalue(L, 1);
jbe@103 283 lua_getfield(L, -1, "writequeue");
jbe@84 284 for (i=2; i<=top; i++) {
jbe@84 285 luaL_checklstring(L, i, &strlen);
jbe@84 286 lua_pushvalue(L, i);
jbe@84 287 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 288 handle->writeleft += strlen;
jbe@81 289 }
jbe@83 290 while (handle->writeqout != handle->writeqin) {
jbe@83 291 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 292 str = lua_tolstring(L, -1, &strlen);
jbe@92 293 while (handle->writeqoff < strlen) {
jbe@103 294 if (
jbe@103 295 strlen - handle->writeqoff <=
jbe@103 296 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 297 ) {
jbe@103 298 memcpy(
jbe@103 299 handle->writebuf + handle->writebufin,
jbe@103 300 str + handle->writeqoff,
jbe@103 301 strlen - handle->writeqoff
jbe@103 302 );
jbe@103 303 handle->writebufin += strlen - handle->writeqoff;
jbe@80 304 break;
jbe@80 305 } else {
jbe@97 306 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 307 memcpy(
jbe@103 308 handle->writebuf + handle->writebufin,
jbe@103 309 str + handle->writeqoff,
jbe@103 310 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 311 );
jbe@103 312 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 313 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@103 314 written = write(
jbe@103 315 handle->fd,
jbe@103 316 handle->writebuf + handle->writebufout,
jbe@103 317 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 318 );
jbe@103 319 if (written < 0) {
jbe@81 320 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 321 goto moonbr_io_write_impl_block;
jbe@81 322 } else if (errno != EINTR) {
jbe@80 323 moonbr_io_errmsg();
jbe@80 324 lua_pushnil(L);
jbe@80 325 lua_pushstring(L, errmsg);
jbe@80 326 return 2;
jbe@80 327 }
jbe@103 328 } else {
jbe@103 329 handle->writebufout += written;
jbe@103 330 handle->writeleft -= written;
jbe@80 331 }
jbe@80 332 }
jbe@103 333 handle->writebufin = 0;
jbe@103 334 handle->writebufout = 0;
jbe@80 335 }
jbe@80 336 }
jbe@81 337 handle->writeqoff = 0;
jbe@81 338 lua_pop(L, 1);
jbe@81 339 lua_pushnil(L);
jbe@83 340 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 341 }
jbe@81 342 if (flush) {
jbe@97 343 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@103 344 while (handle->writebufout < handle->writebufin) {
jbe@103 345 written = write(
jbe@103 346 handle->fd,
jbe@103 347 handle->writebuf + handle->writebufout,
jbe@103 348 handle->writebufin - handle->writebufout
jbe@103 349 );
jbe@103 350 if (written < 0) {
jbe@81 351 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 352 goto moonbr_io_write_impl_block;
jbe@81 353 } else if (errno != EINTR) {
jbe@81 354 moonbr_io_errmsg();
jbe@81 355 lua_pushnil(L);
jbe@81 356 lua_pushstring(L, errmsg);
jbe@81 357 return 2;
jbe@81 358 }
jbe@81 359 } else {
jbe@103 360 handle->writebufout += written;
jbe@103 361 handle->writeleft -= written;
jbe@81 362 }
jbe@81 363 }
jbe@103 364 handle->writebufin = 0;
jbe@103 365 handle->writebufout = 0;
jbe@81 366 }
jbe@103 367 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 368 else lua_pushvalue(L, 1);
jbe@103 369 handle->writeerr = 0;
jbe@80 370 return 1;
jbe@81 371 moonbr_io_write_impl_block:
jbe@91 372 lua_pushinteger(L, handle->writeleft);
jbe@103 373 handle->writeerr = 0;
jbe@81 374 return 1;
jbe@81 375 }
jbe@81 376
jbe@81 377 static int moonbr_io_write(lua_State *L) {
jbe@81 378 return moonbr_io_write_impl(L, 0, 0);
jbe@81 379 }
jbe@81 380
jbe@81 381 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 382 return moonbr_io_write_impl(L, 1, 0);
jbe@80 383 }
jbe@80 384
jbe@80 385 static int moonbr_io_flush(lua_State *L) {
jbe@81 386 return moonbr_io_write_impl(L, 0, 1);
jbe@81 387 }
jbe@81 388
jbe@81 389 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 390 return moonbr_io_write_impl(L, 1, 1);
jbe@80 391 }
jbe@80 392
jbe@88 393 static int moonbr_io_finish(lua_State *L) {
jbe@88 394 moonbr_io_handle_t *handle;
jbe@88 395 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 396 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 397 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 398 if (handle->writeleft) {
jbe@94 399 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 400 lua_pushvalue(L, 1);
jbe@116 401 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 402 handle->finished = 1;
jbe@116 403 lua_error(L);
jbe@116 404 }
jbe@94 405 if (!lua_toboolean(L, -2)) {
jbe@94 406 handle->finished = 1;
jbe@94 407 return 2;
jbe@88 408 }
jbe@94 409 }
jbe@94 410 handle->finished = 1;
jbe@107 411 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 412 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 413 moonbr_io_errmsg();
jbe@88 414 lua_pushnil(L);
jbe@88 415 lua_pushstring(L, errmsg);
jbe@88 416 return 2;
jbe@88 417 }
jbe@94 418 } else {
jbe@94 419 if (close(handle->fd)) {
jbe@94 420 moonbr_io_errmsg();
jbe@94 421 handle->fd = -1;
jbe@94 422 lua_pushnil(L);
jbe@94 423 lua_pushstring(L, errmsg);
jbe@94 424 return 2;
jbe@94 425 }
jbe@94 426 handle->fd = -1; /* fake EOF on read */
jbe@88 427 }
jbe@88 428 lua_pushboolean(L, 1);
jbe@88 429 return 1;
jbe@88 430 }
jbe@88 431
jbe@94 432 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 433 moonbr_io_handle_t *handle;
jbe@83 434 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 435 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 436 if (!reset) {
jbe@87 437 if (handle->writeleft) {
jbe@87 438 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 439 lua_pushvalue(L, 1);
jbe@116 440 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 441 handle->closed = 1;
jbe@116 442 close(handle->fd);
jbe@116 443 handle->fd = -1;
jbe@116 444 lua_error(L);
jbe@116 445 }
jbe@129 446 handle->closed = 1;
jbe@87 447 if (!lua_toboolean(L, -2)) {
jbe@87 448 close(handle->fd);
jbe@87 449 handle->fd = -1;
jbe@87 450 return 2;
jbe@87 451 }
jbe@129 452 } else {
jbe@129 453 handle->closed = 1;
jbe@129 454 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 455 }
jbe@129 456 } else {
jbe@129 457 handle->closed = 1;
jbe@83 458 }
jbe@94 459 if (handle->fd >= 0) {
jbe@94 460 if (close(handle->fd)) {
jbe@94 461 moonbr_io_errmsg();
jbe@94 462 handle->fd = -1;
jbe@94 463 lua_pushnil(L);
jbe@94 464 lua_pushstring(L, errmsg);
jbe@94 465 return 2;
jbe@94 466 }
jbe@104 467 handle->fd = -1;
jbe@83 468 }
jbe@83 469 lua_pushboolean(L, 1);
jbe@83 470 return 1;
jbe@84 471
jbe@83 472 }
jbe@83 473
jbe@94 474 static int moonbr_io_close(lua_State *L) {
jbe@94 475 return moonbr_io_close_impl(L, 0);
jbe@94 476 }
jbe@94 477
jbe@84 478 static int moonbr_io_reset(lua_State *L) {
jbe@94 479 return moonbr_io_close_impl(L, 1);
jbe@84 480 }
jbe@84 481
jbe@108 482 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 483 moonbr_io_handle_t *handle;
jbe@88 484 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 485 if (handle->fd >= 0) {
jbe@88 486 lua_pushcfunction(L, moonbr_io_close);
jbe@88 487 lua_pushvalue(L, 1);
jbe@88 488 lua_pushinteger(L, 0);
jbe@88 489 lua_call(L, 2, 0);
jbe@88 490 }
jbe@88 491 return 0;
jbe@88 492 }
jbe@88 493
jbe@100 494 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 495 moonbr_io_handle_t *handle;
jbe@88 496 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 497 if (!handle->closed) {
jbe@100 498 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 499 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 500 lua_call(L, 1, 0);
jbe@88 501 }
jbe@88 502 }
jbe@88 503
jbe@107 504 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 505 moonbr_io_handle_t *handle;
jbe@107 506 struct sockaddr addr;
jbe@107 507 socklen_t addrlen;
jbe@79 508 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 509 handle->fd = fd;
jbe@107 510 addrlen = sizeof(addr);
jbe@107 511 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 512 if (errno != ENOTSOCK) {
jbe@107 513 moonbr_io_errmsg();
jbe@107 514 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 515 }
jbe@107 516 handle->issock = 0;
jbe@107 517 } else {
jbe@107 518 handle->issock = 1;
jbe@107 519 handle->addrfam = addr.sa_family;
jbe@107 520 }
jbe@94 521 handle->finished = 0;
jbe@94 522 handle->closed = 0;
jbe@81 523 handle->nonblocking = -1;
jbe@95 524 handle->nopush = -1;
jbe@85 525 handle->readerr = 0;
jbe@105 526 handle->readbufin = 0;
jbe@105 527 handle->readbufout = 0;
jbe@81 528 handle->writeerr = 0;
jbe@81 529 handle->writeleft = 0;
jbe@83 530 handle->writeqin = 0;
jbe@83 531 handle->writeqout = 0;
jbe@81 532 handle->writeqoff = 0;
jbe@103 533 handle->writebufin = 0;
jbe@103 534 handle->writebufout = 0;
jbe@87 535 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 536 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 537 lua_setmetatable(L, -2);
jbe@79 538 lua_newtable(L); // uservalue
jbe@81 539 lua_newtable(L);
jbe@103 540 lua_setfield(L, -2, "writequeue");
jbe@79 541 lua_newtable(L); // public
jbe@107 542 if (handle->addrfam == AF_INET6) {
jbe@107 543 struct sockaddr_in6 addr_in6;
jbe@107 544 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 545 const char *addrstr;
jbe@107 546 addrlen = sizeof(addr_in6);
jbe@107 547 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 548 moonbr_io_errmsg();
jbe@107 549 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 550 }
jbe@107 551 if (addrlen > sizeof(addr_in6)) {
jbe@107 552 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 553 }
jbe@107 554 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 555 if (!addrstr) {
jbe@107 556 moonbr_io_errmsg();
jbe@107 557 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 558 } else {
jbe@107 559 lua_pushstring(L, addrstr);
jbe@107 560 lua_setfield(L, -2, "local_ip6");
jbe@107 561 }
jbe@107 562 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 563 lua_setfield(L, -2, "local_tcpport");
jbe@107 564 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 565 moonbr_io_errmsg();
jbe@107 566 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 567 }
jbe@107 568 if (addrlen > sizeof(addr_in6)) {
jbe@107 569 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 570 }
jbe@107 571 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 572 if (!addrstr) {
jbe@107 573 moonbr_io_errmsg();
jbe@107 574 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 575 } else {
jbe@107 576 lua_pushstring(L, addrstr);
jbe@107 577 lua_setfield(L, -2, "remote_ip6");
jbe@107 578 }
jbe@107 579 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 580 lua_setfield(L, -2, "remote_tcpport");
jbe@107 581 } else if (handle->addrfam == AF_INET) {
jbe@107 582 struct sockaddr_in addr_in;
jbe@107 583 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 584 const char *addrstr;
jbe@107 585 addrlen = sizeof(addr_in);
jbe@107 586 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 587 moonbr_io_errmsg();
jbe@107 588 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 589 }
jbe@107 590 if (addrlen > sizeof(addr_in)) {
jbe@107 591 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 592 }
jbe@107 593 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 594 if (!addrstr) {
jbe@107 595 moonbr_io_errmsg();
jbe@107 596 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 597 } else {
jbe@107 598 lua_pushstring(L, addrstr);
jbe@107 599 lua_setfield(L, -2, "local_ip4");
jbe@107 600 }
jbe@107 601 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 602 lua_setfield(L, -2, "local_tcpport");
jbe@107 603 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 604 moonbr_io_errmsg();
jbe@107 605 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 606 }
jbe@107 607 if (addrlen > sizeof(addr_in)) {
jbe@107 608 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 609 }
jbe@107 610 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 611 if (!addrstr) {
jbe@107 612 moonbr_io_errmsg();
jbe@107 613 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 614 } else {
jbe@107 615 lua_pushstring(L, addrstr);
jbe@107 616 lua_setfield(L, -2, "remote_ip4");
jbe@107 617 }
jbe@107 618 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 619 lua_setfield(L, -2, "remote_tcpport");
jbe@107 620 }
jbe@79 621 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 622 lua_setmetatable(L, -2);
jbe@79 623 lua_setfield(L, -2, "public");
jbe@79 624 lua_setuservalue(L, -2);
jbe@79 625 }
jbe@79 626
jbe@79 627 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 628 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 629 lua_getuservalue(L, 1);
jbe@79 630 lua_getfield(L, -1, "public");
jbe@79 631 lua_pushvalue(L, 2);
jbe@79 632 lua_gettable(L, -2);
jbe@79 633 return 1;
jbe@79 634 }
jbe@79 635
jbe@79 636 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 637 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 638 lua_getuservalue(L, 1);
jbe@79 639 lua_getfield(L, -1, "public");
jbe@79 640 lua_pushvalue(L, 2);
jbe@79 641 lua_pushvalue(L, 3);
jbe@79 642 lua_settable(L, -3);
jbe@79 643 return 0;
jbe@79 644 }
jbe@79 645
jbe@111 646 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 647 const char *path;
jbe@111 648 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 649 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 650 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 651 ) - 1; /* one byte for termination */
jbe@111 652 int sock;
jbe@111 653 path = luaL_checkstring(L, 1);
jbe@111 654 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 655 strcpy(sockaddr.sun_path, path);
jbe@111 656 sock = socket(
jbe@111 657 PF_LOCAL,
jbe@111 658 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 659 0
jbe@111 660 );
jbe@111 661 if (sock < 0) {
jbe@111 662 moonbr_io_errmsg();
jbe@111 663 lua_pushnil(L);
jbe@111 664 lua_pushstring(L, errmsg);
jbe@111 665 return 2;
jbe@111 666 }
jbe@111 667 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 668 if (!nonblocking && errno == EINTR) {
jbe@111 669 moonbr_io_errmsg();
jbe@111 670 close(sock);
jbe@111 671 lua_pushnil(L);
jbe@111 672 lua_pushstring(L, errmsg);
jbe@111 673 return 2;
jbe@111 674 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 675 moonbr_io_errmsg();
jbe@111 676 lua_pushnil(L);
jbe@111 677 lua_pushstring(L, errmsg);
jbe@111 678 return 2;
jbe@111 679 }
jbe@111 680 }
jbe@111 681 moonbr_io_pushhandle(L, sock);
jbe@111 682 return 1;
jbe@111 683 }
jbe@111 684
jbe@111 685 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 686 return moonbr_io_localconnect_impl(L, 0);
jbe@111 687 }
jbe@111 688
jbe@111 689 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 690 return moonbr_io_localconnect_impl(L, 1);
jbe@111 691 }
jbe@111 692
jbe@99 693 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 694 const char *host, *port;
jbe@98 695 struct addrinfo hints = { 0, };
jbe@98 696 struct addrinfo *res, *addrinfo;
jbe@98 697 int errcode;
jbe@98 698 int sock;
jbe@98 699 host = luaL_checkstring(L, 1);
jbe@98 700 port = luaL_checkstring(L, 2);
jbe@98 701 hints.ai_family = AF_UNSPEC;
jbe@98 702 hints.ai_socktype = SOCK_STREAM;
jbe@98 703 hints.ai_protocol = IPPROTO_TCP;
jbe@98 704 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 705 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 706 if (errcode) {
jbe@102 707 freeaddrinfo(res);
jbe@98 708 if (errcode == EAI_SYSTEM) {
jbe@98 709 moonbr_io_errmsg();
jbe@98 710 lua_pushnil(L);
jbe@98 711 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 712 } else {
jbe@98 713 lua_pushnil(L);
jbe@98 714 lua_pushstring(L, gai_strerror(errcode));
jbe@98 715 }
jbe@98 716 return 2;
jbe@98 717 }
jbe@98 718 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 719 if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 720 }
jbe@98 721 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 722 if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 723 }
jbe@98 724 addrinfo = res;
jbe@98 725 moonbr_io_tcpconnect_found:
jbe@99 726 sock = socket(
jbe@99 727 addrinfo->ai_family,
jbe@99 728 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 729 addrinfo->ai_protocol
jbe@99 730 );
jbe@98 731 if (sock < 0) {
jbe@98 732 moonbr_io_errmsg();
jbe@108 733 freeaddrinfo(res);
jbe@98 734 lua_pushnil(L);
jbe@98 735 lua_pushstring(L, errmsg);
jbe@108 736 return 2;
jbe@98 737 }
jbe@98 738 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 739 freeaddrinfo(res);
jbe@99 740 if (!nonblocking && errno == EINTR) {
jbe@99 741 moonbr_io_errmsg();
jbe@99 742 close(sock);
jbe@99 743 lua_pushnil(L);
jbe@99 744 lua_pushstring(L, errmsg);
jbe@99 745 return 2;
jbe@99 746 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 747 moonbr_io_errmsg();
jbe@99 748 lua_pushnil(L);
jbe@99 749 lua_pushstring(L, errmsg);
jbe@99 750 return 2;
jbe@99 751 }
jbe@108 752 } else {
jbe@108 753 freeaddrinfo(res);
jbe@98 754 }
jbe@107 755 moonbr_io_pushhandle(L, sock);
jbe@98 756 return 1;
jbe@98 757 }
jbe@98 758
jbe@99 759 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 760 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 761 }
jbe@99 762
jbe@99 763 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 764 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 765 }
jbe@99 766
jbe@112 767 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 768 moonbr_io_listener_t *listener;
jbe@112 769 const char *path;
jbe@118 770 struct stat sb;
jbe@112 771 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 772 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 773 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 774 ) - 1; /* one byte for termination */
jbe@112 775 int sock;
jbe@112 776 path = luaL_checkstring(L, 1);
jbe@112 777 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 778 strcpy(sockaddr.sun_path, path);
jbe@118 779 if (stat(path, &sb) == 0) {
jbe@118 780 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 781 }
jbe@112 782 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 783 listener->fd = -1;
jbe@112 784 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 785 sock = socket(
jbe@112 786 PF_LOCAL,
jbe@112 787 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 788 0
jbe@112 789 );
jbe@112 790 if (sock < 0) {
jbe@112 791 moonbr_io_errmsg();
jbe@112 792 lua_pushnil(L);
jbe@112 793 lua_pushstring(L, errmsg);
jbe@112 794 return 2;
jbe@112 795 }
jbe@112 796 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 797 moonbr_io_errmsg();
jbe@112 798 close(sock);
jbe@112 799 lua_pushnil(L);
jbe@112 800 lua_pushstring(L, errmsg);
jbe@112 801 return 2;
jbe@112 802 }
jbe@112 803 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 804 moonbr_io_errmsg();
jbe@112 805 close(sock);
jbe@112 806 lua_pushnil(L);
jbe@112 807 lua_pushstring(L, errmsg);
jbe@112 808 return 2;
jbe@112 809 }
jbe@112 810 listener->fd = sock;
jbe@118 811 listener->addrfam = AF_LOCAL;
jbe@112 812 listener->nonblocking = -1;
jbe@112 813 return 1;
jbe@112 814 }
jbe@112 815
jbe@108 816 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 817 moonbr_io_listener_t *listener;
jbe@108 818 const char *host, *port;
jbe@108 819 struct addrinfo hints = { 0, };
jbe@108 820 struct addrinfo *res, *addrinfo;
jbe@108 821 int errcode;
jbe@108 822 int sock;
jbe@108 823 host = luaL_optstring(L, 1, NULL);
jbe@108 824 port = luaL_checkstring(L, 2);
jbe@108 825 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 826 listener->fd = -1;
jbe@108 827 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 828 hints.ai_family = AF_UNSPEC;
jbe@108 829 hints.ai_socktype = SOCK_STREAM;
jbe@108 830 hints.ai_protocol = IPPROTO_TCP;
jbe@108 831 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 832 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 833 if (errcode) {
jbe@108 834 freeaddrinfo(res);
jbe@108 835 if (errcode == EAI_SYSTEM) {
jbe@108 836 moonbr_io_errmsg();
jbe@108 837 lua_pushnil(L);
jbe@108 838 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 839 } else {
jbe@108 840 lua_pushnil(L);
jbe@108 841 lua_pushstring(L, gai_strerror(errcode));
jbe@108 842 }
jbe@108 843 return 2;
jbe@108 844 }
jbe@108 845 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@108 846 if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 847 }
jbe@108 848 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@108 849 if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 850 }
jbe@108 851 addrinfo = res;
jbe@108 852 moonbr_io_tcpconnect_found:
jbe@118 853 listener->addrfam = addrinfo->ai_family;
jbe@108 854 sock = socket(
jbe@108 855 addrinfo->ai_family,
jbe@108 856 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 857 addrinfo->ai_protocol
jbe@108 858 );
jbe@108 859 if (sock < 0) {
jbe@108 860 moonbr_io_errmsg();
jbe@108 861 freeaddrinfo(res);
jbe@108 862 lua_pushnil(L);
jbe@108 863 lua_pushstring(L, errmsg);
jbe@108 864 return 2;
jbe@108 865 }
jbe@120 866 {
jbe@120 867 static const int reuseval = 1;
jbe@120 868 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 869 moonbr_io_errmsg();
jbe@120 870 freeaddrinfo(res);
jbe@120 871 close(sock);
jbe@120 872 lua_pushnil(L);
jbe@120 873 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 874 return 2;
jbe@120 875 }
jbe@120 876 }
jbe@108 877 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 878 moonbr_io_errmsg();
jbe@108 879 freeaddrinfo(res);
jbe@108 880 close(sock);
jbe@108 881 lua_pushnil(L);
jbe@108 882 lua_pushstring(L, errmsg);
jbe@108 883 return 2;
jbe@108 884 }
jbe@108 885 freeaddrinfo(res);
jbe@108 886 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 887 moonbr_io_errmsg();
jbe@108 888 close(sock);
jbe@108 889 lua_pushnil(L);
jbe@108 890 lua_pushstring(L, errmsg);
jbe@108 891 return 2;
jbe@108 892 }
jbe@108 893 listener->fd = sock;
jbe@108 894 listener->nonblocking = -1;
jbe@108 895 return 1;
jbe@108 896 }
jbe@108 897
jbe@108 898 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 899 moonbr_io_listener_t *listener;
jbe@108 900 int fd;
jbe@108 901 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 902 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 903 if (listener->nonblocking != nonblocking) {
jbe@108 904 int flags;
jbe@108 905 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 906 if (flags == -1) {
jbe@108 907 moonbr_io_errmsg();
jbe@108 908 close(listener->fd);
jbe@108 909 listener->fd = -1;
jbe@108 910 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 911 }
jbe@108 912 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 913 else flags &= ~O_NONBLOCK;
jbe@108 914 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 915 moonbr_io_errmsg();
jbe@108 916 close(listener->fd);
jbe@108 917 listener->fd = -1;
jbe@108 918 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 919 }
jbe@108 920 listener->nonblocking = nonblocking;
jbe@108 921 }
jbe@108 922 while (1) {
jbe@108 923 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 924 if (fd < 0) {
jbe@108 925 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 926 lua_pushboolean(L, 0);
jbe@108 927 lua_pushliteral(L, "No incoming connection pending");
jbe@108 928 return 2;
jbe@108 929 } else if (errno != EINTR) {
jbe@108 930 moonbr_io_errmsg();
jbe@108 931 lua_pushnil(L);
jbe@108 932 lua_pushstring(L, errmsg);
jbe@108 933 return 2;
jbe@108 934 }
jbe@108 935 } else {
jbe@108 936 moonbr_io_pushhandle(L, fd);
jbe@108 937 return 1;
jbe@108 938 }
jbe@108 939 }
jbe@108 940 }
jbe@108 941
jbe@108 942 static int moonbr_io_accept(lua_State *L) {
jbe@108 943 return moonbr_io_accept_impl(L, 0);
jbe@108 944 }
jbe@108 945
jbe@108 946 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 947 return moonbr_io_accept_impl(L, 1);
jbe@108 948 }
jbe@108 949
jbe@108 950 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 951 moonbr_io_listener_t *listener;
jbe@118 952 struct sockaddr_un addr;
jbe@118 953 socklen_t addrlen;
jbe@118 954 struct stat sb;
jbe@108 955 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 956 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 957 addrlen = sizeof(addr);
jbe@118 958 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 959 if (close(listener->fd)) {
jbe@108 960 moonbr_io_errmsg();
jbe@108 961 listener->fd = -1;
jbe@118 962 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 963 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 964 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 965 }
jbe@118 966 }
jbe@108 967 lua_pushnil(L);
jbe@108 968 lua_pushstring(L, errmsg);
jbe@108 969 return 2;
jbe@108 970 }
jbe@108 971 listener->fd = -1;
jbe@118 972 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 973 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 974 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 975 }
jbe@118 976 }
jbe@108 977 lua_pushboolean(L, 1);
jbe@108 978 return 1;
jbe@108 979 }
jbe@108 980
jbe@108 981 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 982 moonbr_io_listener_t *listener;
jbe@108 983 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 984 if (listener->fd >= 0) close(listener->fd);
jbe@108 985 listener->fd = -1;
jbe@108 986 return 0;
jbe@108 987 }
jbe@108 988
jbe@106 989 static int moonbr_io_poll(lua_State *L) {
jbe@106 990 moonbr_io_handle_t *handle;
jbe@108 991 moonbr_io_listener_t *listener;
jbe@106 992 int fd, isnum;
jbe@106 993 int nfds = 0;
jbe@106 994 fd_set readfds, writefds, exceptfds;
jbe@106 995 struct timeval timeout = {0, };
jbe@106 996 int status;
jbe@106 997 FD_ZERO(&readfds);
jbe@106 998 FD_ZERO(&writefds);
jbe@106 999 FD_ZERO(&exceptfds);
jbe@106 1000 if (!lua_isnoneornil(L, 1)) {
jbe@106 1001 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1002 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1003 if (lua_toboolean(L, -1)) {
jbe@106 1004 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1005 if (handle) {
jbe@109 1006 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1007 fd = handle->fd;
jbe@122 1008 if (
jbe@122 1009 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1010 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1011 ) {
jbe@109 1012 lua_pushboolean(L, 1);
jbe@109 1013 return 1;
jbe@109 1014 }
jbe@106 1015 } else {
jbe@108 1016 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1017 if (listener) {
jbe@108 1018 fd = listener->fd;
jbe@108 1019 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1020 } else {
jbe@108 1021 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1022 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1023 }
jbe@106 1024 }
jbe@106 1025 FD_SET(fd, &readfds);
jbe@106 1026 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1027 }
jbe@106 1028 }
jbe@106 1029 }
jbe@106 1030 if (!lua_isnoneornil(L, 2)) {
jbe@106 1031 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1032 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1033 if (lua_toboolean(L, -1)) {
jbe@106 1034 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1035 if (handle) {
jbe@109 1036 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1037 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1038 fd = handle->fd;
jbe@106 1039 } else {
jbe@108 1040 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1041 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1042 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1043 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1044 }
jbe@106 1045 FD_SET(fd, &writefds);
jbe@106 1046 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1047 }
jbe@106 1048 }
jbe@106 1049 }
jbe@106 1050 if (!lua_isnoneornil(L, 3)) {
jbe@106 1051 lua_Number n;
jbe@106 1052 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1053 if (isnum && n>=0 && n<100000000) {
jbe@106 1054 timeout.tv_sec = n;
jbe@106 1055 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1056 } else {
jbe@106 1057 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1058 }
jbe@106 1059 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1060 } else {
jbe@106 1061 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1062 }
jbe@106 1063 if (status == -1) {
jbe@106 1064 if (errno == EINTR) {
jbe@106 1065 lua_pushboolean(L, 0);
jbe@106 1066 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1067 return 2;
jbe@106 1068 } else {
jbe@106 1069 moonbr_io_errmsg();
jbe@106 1070 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1071 }
jbe@106 1072 } else if (status == 0) {
jbe@106 1073 lua_pushboolean(L, 0);
jbe@106 1074 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1075 return 2;
jbe@106 1076 } else {
jbe@106 1077 lua_pushboolean(L, 1);
jbe@106 1078 return 1;
jbe@106 1079 }
jbe@106 1080 }
jbe@106 1081
jbe@115 1082 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1083 lua_Number sub;
jbe@115 1084 struct timespec tp;
jbe@115 1085 sub = luaL_optnumber(L, 1, 0);
jbe@115 1086 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1087 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1088 }
jbe@115 1089 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1090 return 1;
jbe@115 1091 }
jbe@115 1092
jbe@79 1093 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1094 {"read", moonbr_io_read},
jbe@85 1095 {"read_nb", moonbr_io_read_nb},
jbe@86 1096 {"drain", moonbr_io_drain},
jbe@86 1097 {"drain_nb", moonbr_io_drain_nb},
jbe@80 1098 {"write", moonbr_io_write},
jbe@81 1099 {"write_nb", moonbr_io_write_nb},
jbe@80 1100 {"flush", moonbr_io_flush},
jbe@81 1101 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1102 {"finish", moonbr_io_finish},
jbe@87 1103 {"close", moonbr_io_close},
jbe@85 1104 {"reset", moonbr_io_reset},
jbe@79 1105 {NULL, NULL}
jbe@79 1106 };
jbe@79 1107
jbe@79 1108 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1109 {"__index", moonbr_io_handleindex},
jbe@79 1110 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1111 {"__gc", moonbr_io_handlegc},
jbe@108 1112 {NULL, NULL}
jbe@108 1113 };
jbe@108 1114
jbe@108 1115 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1116 {"accept", moonbr_io_accept},
jbe@108 1117 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1118 {"close", moonbr_io_unlisten},
jbe@108 1119 {NULL, NULL}
jbe@108 1120 };
jbe@108 1121
jbe@108 1122 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1123 {"__gc", moonbr_io_listenergc},
jbe@79 1124 {NULL, NULL}
jbe@79 1125 };
jbe@79 1126
jbe@79 1127 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1128 {"localconnect", moonbr_io_localconnect},
jbe@111 1129 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1130 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1131 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1132 {"locallisten", moonbr_io_locallisten},
jbe@108 1133 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1134 {"poll", moonbr_io_poll},
jbe@115 1135 {"timeref", moonbr_io_timeref},
jbe@79 1136 {NULL, NULL}
jbe@79 1137 };
jbe@79 1138
jbe@79 1139 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1140
jbe@113 1141 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1142
jbe@80 1143 lua_newtable(L); // module
jbe@80 1144
jbe@79 1145 lua_newtable(L); // public metatable
jbe@79 1146 lua_newtable(L); // handle methods
jbe@79 1147 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1148 lua_pushvalue(L, -1);
jbe@108 1149 lua_setfield(L, -4, "prototype_handle");
jbe@79 1150 lua_setfield(L, -2, "__index");
jbe@79 1151 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1152
jbe@79 1153 lua_newtable(L); // handle metatable
jbe@79 1154 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1155 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1156
jbe@108 1157 lua_newtable(L); // listener metatable
jbe@108 1158 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1159 lua_newtable(L); // listener methods
jbe@108 1160 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1161 lua_pushvalue(L, -1);
jbe@108 1162 lua_setfield(L, -4, "prototype_listener");
jbe@108 1163 lua_setfield(L, -2, "__index");
jbe@108 1164 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1165
jbe@79 1166 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1167 return 1;
jbe@79 1168
jbe@79 1169 }
jbe@79 1170

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