moonbridge

annotate moonbridge_io.c @ 132:293e666a41e0

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Revised flushing behavior of write_nb(...)
author jbe
date Thu Apr 16 04:24:21 2015 +0200 (2015-04-16)
parents df08e63dc44b
children 891cdc4b43eb
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@132 51 size_t flushedleft;
jbe@83 52 #if LUA_VERSION_NUM >= 503
jbe@83 53 lua_Integer writeqin;
jbe@83 54 lua_Integer writeqout;
jbe@83 55 #else
jbe@83 56 int writeqin;
jbe@83 57 int writeqout;
jbe@83 58 #endif
jbe@83 59 size_t writeqoff;
jbe@103 60 int writebufin;
jbe@103 61 int writebufout;
jbe@85 62 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 63 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 64 } moonbr_io_handle_t;
jbe@79 65
jbe@108 66 typedef struct {
jbe@108 67 int fd;
jbe@118 68 sa_family_t addrfam;
jbe@108 69 int nonblocking;
jbe@108 70 } moonbr_io_listener_t;
jbe@108 71
jbe@81 72 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 73 int flags;
jbe@95 74 if (handle->nonblocking == nonblocking) return;
jbe@95 75 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 76 if (flags == -1) {
jbe@95 77 moonbr_io_errmsg();
jbe@96 78 close(handle->fd);
jbe@96 79 handle->fd = -1;
jbe@96 80 handle->closed = 1;
jbe@95 81 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 82 }
jbe@95 83 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 84 else flags &= ~O_NONBLOCK;
jbe@95 85 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 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 in fcntl call: %s", errmsg);
jbe@95 91 }
jbe@95 92 handle->nonblocking = nonblocking;
jbe@81 93 }
jbe@81 94
jbe@87 95 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 96 struct linger lingerval = { 0, };
jbe@107 97 if (!handle->issock) return;
jbe@87 98 if (timeout >= 0) {
jbe@87 99 lingerval.l_onoff = 1;
jbe@87 100 lingerval.l_linger = timeout;
jbe@87 101 }
jbe@87 102 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 103 moonbr_io_errmsg();
jbe@96 104 close(handle->fd);
jbe@96 105 handle->fd = -1;
jbe@96 106 handle->closed = 1;
jbe@95 107 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 108 }
jbe@87 109 }
jbe@87 110
jbe@95 111 static void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 112 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 113 if (
jbe@107 114 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 115 handle->nopush == nopush
jbe@107 116 ) return;
jbe@96 117 #if defined(TCP_NOPUSH)
jbe@96 118 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 119 #elif defined(TCP_CORK)
jbe@104 120 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 121 #endif
jbe@96 122 moonbr_io_errmsg();
jbe@96 123 close(handle->fd);
jbe@96 124 handle->fd = -1;
jbe@96 125 handle->closed = 1;
jbe@104 126 #if defined(TCP_NOPUSH)
jbe@96 127 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 128 #elif defined(TCP_CORK)
jbe@95 129 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 130 #endif
jbe@95 131 }
jbe@95 132 handle->nopush = nopush;
jbe@96 133 #else
jbe@96 134 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 135 #endif
jbe@95 136 }
jbe@95 137
jbe@86 138 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 139 moonbr_io_handle_t *handle;
jbe@85 140 lua_Integer maxread;
jbe@85 141 const char *terminatorstr;
jbe@85 142 size_t terminatorlen;
jbe@85 143 char terminator;
jbe@85 144 luaL_Buffer luabuf;
jbe@85 145 size_t luabufcnt = 0;
jbe@105 146 int remaining;
jbe@85 147 char *terminatorpos;
jbe@103 148 ssize_t bytesread;
jbe@85 149 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 150 maxread = luaL_optinteger(L, 2, 0);
jbe@85 151 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 152 if (terminatorlen) {
jbe@85 153 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 154 terminator = terminatorstr[0];
jbe@85 155 }
jbe@86 156 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 157 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 158 if (handle->readerr) {
jbe@85 159 lua_pushnil(L);
jbe@85 160 lua_pushliteral(L, "Previous read error");
jbe@85 161 return 2;
jbe@85 162 }
jbe@105 163 handle->readerr = 1;
jbe@104 164 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@85 165 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 166 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 167 while (1) {
jbe@105 168 remaining = -1;
jbe@105 169 if (
jbe@105 170 maxread > 0 &&
jbe@105 171 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 172 ) {
jbe@105 173 remaining = maxread - luabufcnt;
jbe@85 174 } else if (terminatorlen) {
jbe@105 175 terminatorpos = memchr(
jbe@105 176 handle->readbuf + handle->readbufout,
jbe@105 177 terminator,
jbe@105 178 handle->readbufin - handle->readbufout
jbe@105 179 );
jbe@105 180 if (terminatorpos) remaining = 1 + (
jbe@105 181 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@105 182 );
jbe@85 183 }
jbe@105 184 if (remaining >= 0) {
jbe@86 185 if (!drain) {
jbe@105 186 luaL_addlstring(
jbe@105 187 &luabuf,
jbe@105 188 handle->readbuf + handle->readbufout,
jbe@105 189 remaining
jbe@105 190 );
jbe@86 191 luaL_pushresult(&luabuf);
jbe@90 192 } else {
jbe@105 193 luaL_pushresult(&luabuf);
jbe@105 194 lua_pop(L, 1);
jbe@105 195 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 196 }
jbe@105 197 handle->readbufout += remaining;
jbe@105 198 if (handle->readbufout == handle->readbufin) {
jbe@105 199 handle->readbufin = 0;
jbe@105 200 handle->readbufout =0;
jbe@105 201 }
jbe@104 202 handle->readerr = 0;
jbe@85 203 return 1;
jbe@85 204 }
jbe@105 205 if (!drain) luaL_addlstring(
jbe@105 206 &luabuf,
jbe@105 207 handle->readbuf + handle->readbufout,
jbe@105 208 handle->readbufin - handle->readbufout
jbe@105 209 );
jbe@105 210 luabufcnt += handle->readbufin - handle->readbufout;
jbe@85 211 do {
jbe@103 212 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 213 } while (bytesread < 0 && (errno == EINTR));
jbe@105 214 if (
jbe@105 215 bytesread == 0 || (
jbe@105 216 nonblocking &&
jbe@105 217 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 218 )
jbe@105 219 ) {
jbe@105 220 handle->readbufin = 0;
jbe@105 221 handle->readbufout = 0;
jbe@105 222 if (!drain) {
jbe@105 223 luaL_pushresult(&luabuf);
jbe@105 224 if (!luabufcnt && bytesread == 0) {
jbe@105 225 lua_pop(L, 1);
jbe@105 226 moonbr_io_read_impl_eof:
jbe@105 227 lua_pushboolean(L, 0);
jbe@105 228 lua_pushliteral(L, "End of file");
jbe@105 229 handle->readerr = 0;
jbe@105 230 return 2;
jbe@105 231 }
jbe@105 232 } else {
jbe@105 233 if (!luabufcnt && bytesread == 0) lua_pushboolean(L, 1);
jbe@105 234 else lua_pushboolean(L, luabufcnt);
jbe@105 235 }
jbe@105 236 handle->readerr = 0;
jbe@105 237 return 1;
jbe@105 238 }
jbe@103 239 if (bytesread < 0) {
jbe@85 240 moonbr_io_errmsg();
jbe@85 241 lua_pushnil(L);
jbe@85 242 lua_pushstring(L, errmsg);
jbe@85 243 return 2;
jbe@85 244 }
jbe@105 245 handle->readbufin = bytesread;
jbe@105 246 handle->readbufout = 0;
jbe@86 247 }
jbe@85 248 }
jbe@85 249
jbe@85 250 static int moonbr_io_read(lua_State *L) {
jbe@86 251 return moonbr_io_read_impl(L, 0, 0);
jbe@85 252 }
jbe@85 253
jbe@85 254 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 255 return moonbr_io_read_impl(L, 1, 0);
jbe@86 256 }
jbe@86 257
jbe@86 258 static int moonbr_io_drain(lua_State *L) {
jbe@86 259 return moonbr_io_read_impl(L, 0, 1);
jbe@86 260 }
jbe@86 261
jbe@86 262 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 263 return moonbr_io_read_impl(L, 1, 1);
jbe@85 264 }
jbe@85 265
jbe@81 266 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 267 moonbr_io_handle_t *handle;
jbe@80 268 int i, top;
jbe@80 269 const char *str;
jbe@92 270 size_t strlen;
jbe@103 271 ssize_t written;
jbe@80 272 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 273 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 274 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 275 if (handle->writeerr) {
jbe@80 276 lua_pushnil(L);
jbe@80 277 lua_pushliteral(L, "Previous write error");
jbe@80 278 return 2;
jbe@80 279 }
jbe@103 280 handle->writeerr = 1;
jbe@81 281 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 282 top = lua_gettop(L);
jbe@81 283 lua_getuservalue(L, 1);
jbe@103 284 lua_getfield(L, -1, "writequeue");
jbe@84 285 for (i=2; i<=top; i++) {
jbe@84 286 luaL_checklstring(L, i, &strlen);
jbe@84 287 lua_pushvalue(L, i);
jbe@84 288 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 289 handle->writeleft += strlen;
jbe@81 290 }
jbe@132 291 if (flush) handle->flushedleft = handle->writeleft;
jbe@132 292 if (handle->flushedleft) moonbr_io_handle_set_nopush(L, handle, 0);
jbe@83 293 while (handle->writeqout != handle->writeqin) {
jbe@83 294 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 295 str = lua_tolstring(L, -1, &strlen);
jbe@92 296 while (handle->writeqoff < strlen) {
jbe@103 297 if (
jbe@132 298 strlen - handle->writeqoff <
jbe@103 299 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 300 ) {
jbe@103 301 memcpy(
jbe@103 302 handle->writebuf + handle->writebufin,
jbe@103 303 str + handle->writeqoff,
jbe@103 304 strlen - handle->writeqoff
jbe@103 305 );
jbe@103 306 handle->writebufin += strlen - handle->writeqoff;
jbe@80 307 break;
jbe@80 308 } else {
jbe@103 309 memcpy(
jbe@103 310 handle->writebuf + handle->writebufin,
jbe@103 311 str + handle->writeqoff,
jbe@103 312 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 313 );
jbe@103 314 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 315 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@132 316 if (!handle->flushedleft) moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 317 written = write(
jbe@103 318 handle->fd,
jbe@103 319 handle->writebuf + handle->writebufout,
jbe@103 320 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 321 );
jbe@103 322 if (written < 0) {
jbe@81 323 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 324 goto moonbr_io_write_impl_block;
jbe@81 325 } else if (errno != EINTR) {
jbe@80 326 moonbr_io_errmsg();
jbe@80 327 lua_pushnil(L);
jbe@80 328 lua_pushstring(L, errmsg);
jbe@80 329 return 2;
jbe@80 330 }
jbe@103 331 } else {
jbe@103 332 handle->writebufout += written;
jbe@103 333 handle->writeleft -= written;
jbe@132 334 if (written >= handle->flushedleft) handle->flushedleft = 0;
jbe@132 335 else handle->flushedleft -= written;
jbe@80 336 }
jbe@80 337 }
jbe@103 338 handle->writebufin = 0;
jbe@103 339 handle->writebufout = 0;
jbe@80 340 }
jbe@80 341 }
jbe@81 342 handle->writeqoff = 0;
jbe@81 343 lua_pop(L, 1);
jbe@81 344 lua_pushnil(L);
jbe@83 345 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 346 }
jbe@132 347 while (handle->flushedleft) {
jbe@132 348 written = write(
jbe@132 349 handle->fd,
jbe@132 350 handle->writebuf + handle->writebufout,
jbe@132 351 handle->writebufin - handle->writebufout
jbe@132 352 );
jbe@132 353 if (written < 0) {
jbe@132 354 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 355 goto moonbr_io_write_impl_block;
jbe@132 356 } else if (errno != EINTR) {
jbe@132 357 moonbr_io_errmsg();
jbe@132 358 lua_pushnil(L);
jbe@132 359 lua_pushstring(L, errmsg);
jbe@132 360 return 2;
jbe@81 361 }
jbe@132 362 } else {
jbe@132 363 handle->writebufout += written;
jbe@132 364 handle->writeleft -= written;
jbe@132 365 if (written >= handle->flushedleft) handle->flushedleft = 0;
jbe@132 366 else handle->flushedleft -= written;
jbe@81 367 }
jbe@132 368 }
jbe@132 369 if (handle->writebufout == handle->writebufin) {
jbe@103 370 handle->writebufin = 0;
jbe@103 371 handle->writebufout = 0;
jbe@81 372 }
jbe@103 373 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 374 else lua_pushvalue(L, 1);
jbe@103 375 handle->writeerr = 0;
jbe@80 376 return 1;
jbe@81 377 moonbr_io_write_impl_block:
jbe@91 378 lua_pushinteger(L, handle->writeleft);
jbe@103 379 handle->writeerr = 0;
jbe@81 380 return 1;
jbe@81 381 }
jbe@81 382
jbe@81 383 static int moonbr_io_write(lua_State *L) {
jbe@81 384 return moonbr_io_write_impl(L, 0, 0);
jbe@81 385 }
jbe@81 386
jbe@81 387 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 388 return moonbr_io_write_impl(L, 1, 0);
jbe@80 389 }
jbe@80 390
jbe@80 391 static int moonbr_io_flush(lua_State *L) {
jbe@81 392 return moonbr_io_write_impl(L, 0, 1);
jbe@81 393 }
jbe@81 394
jbe@81 395 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 396 return moonbr_io_write_impl(L, 1, 1);
jbe@80 397 }
jbe@80 398
jbe@88 399 static int moonbr_io_finish(lua_State *L) {
jbe@88 400 moonbr_io_handle_t *handle;
jbe@88 401 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 402 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 403 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 404 if (handle->writeleft) {
jbe@94 405 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 406 lua_pushvalue(L, 1);
jbe@116 407 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 408 handle->finished = 1;
jbe@116 409 lua_error(L);
jbe@116 410 }
jbe@94 411 if (!lua_toboolean(L, -2)) {
jbe@94 412 handle->finished = 1;
jbe@94 413 return 2;
jbe@88 414 }
jbe@94 415 }
jbe@94 416 handle->finished = 1;
jbe@107 417 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 418 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 419 moonbr_io_errmsg();
jbe@88 420 lua_pushnil(L);
jbe@88 421 lua_pushstring(L, errmsg);
jbe@88 422 return 2;
jbe@88 423 }
jbe@94 424 } else {
jbe@94 425 if (close(handle->fd)) {
jbe@94 426 moonbr_io_errmsg();
jbe@94 427 handle->fd = -1;
jbe@94 428 lua_pushnil(L);
jbe@94 429 lua_pushstring(L, errmsg);
jbe@94 430 return 2;
jbe@94 431 }
jbe@94 432 handle->fd = -1; /* fake EOF on read */
jbe@88 433 }
jbe@88 434 lua_pushboolean(L, 1);
jbe@88 435 return 1;
jbe@88 436 }
jbe@88 437
jbe@94 438 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 439 moonbr_io_handle_t *handle;
jbe@83 440 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 441 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 442 if (!reset) {
jbe@87 443 if (handle->writeleft) {
jbe@87 444 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 445 lua_pushvalue(L, 1);
jbe@116 446 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 447 handle->closed = 1;
jbe@116 448 close(handle->fd);
jbe@116 449 handle->fd = -1;
jbe@116 450 lua_error(L);
jbe@116 451 }
jbe@129 452 handle->closed = 1;
jbe@87 453 if (!lua_toboolean(L, -2)) {
jbe@87 454 close(handle->fd);
jbe@87 455 handle->fd = -1;
jbe@87 456 return 2;
jbe@87 457 }
jbe@129 458 } else {
jbe@129 459 handle->closed = 1;
jbe@129 460 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 461 }
jbe@129 462 } else {
jbe@129 463 handle->closed = 1;
jbe@83 464 }
jbe@94 465 if (handle->fd >= 0) {
jbe@94 466 if (close(handle->fd)) {
jbe@94 467 moonbr_io_errmsg();
jbe@94 468 handle->fd = -1;
jbe@94 469 lua_pushnil(L);
jbe@94 470 lua_pushstring(L, errmsg);
jbe@94 471 return 2;
jbe@94 472 }
jbe@104 473 handle->fd = -1;
jbe@83 474 }
jbe@83 475 lua_pushboolean(L, 1);
jbe@83 476 return 1;
jbe@84 477
jbe@83 478 }
jbe@83 479
jbe@94 480 static int moonbr_io_close(lua_State *L) {
jbe@94 481 return moonbr_io_close_impl(L, 0);
jbe@94 482 }
jbe@94 483
jbe@84 484 static int moonbr_io_reset(lua_State *L) {
jbe@94 485 return moonbr_io_close_impl(L, 1);
jbe@84 486 }
jbe@84 487
jbe@108 488 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 489 moonbr_io_handle_t *handle;
jbe@88 490 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 491 if (handle->fd >= 0) {
jbe@88 492 lua_pushcfunction(L, moonbr_io_close);
jbe@88 493 lua_pushvalue(L, 1);
jbe@88 494 lua_pushinteger(L, 0);
jbe@88 495 lua_call(L, 2, 0);
jbe@88 496 }
jbe@88 497 return 0;
jbe@88 498 }
jbe@88 499
jbe@100 500 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 501 moonbr_io_handle_t *handle;
jbe@88 502 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 503 if (!handle->closed) {
jbe@100 504 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 505 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 506 lua_call(L, 1, 0);
jbe@88 507 }
jbe@88 508 }
jbe@88 509
jbe@107 510 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 511 moonbr_io_handle_t *handle;
jbe@107 512 struct sockaddr addr;
jbe@107 513 socklen_t addrlen;
jbe@79 514 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 515 handle->fd = fd;
jbe@107 516 addrlen = sizeof(addr);
jbe@107 517 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 518 if (errno != ENOTSOCK) {
jbe@107 519 moonbr_io_errmsg();
jbe@107 520 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 521 }
jbe@107 522 handle->issock = 0;
jbe@107 523 } else {
jbe@107 524 handle->issock = 1;
jbe@107 525 handle->addrfam = addr.sa_family;
jbe@107 526 }
jbe@94 527 handle->finished = 0;
jbe@94 528 handle->closed = 0;
jbe@81 529 handle->nonblocking = -1;
jbe@95 530 handle->nopush = -1;
jbe@85 531 handle->readerr = 0;
jbe@105 532 handle->readbufin = 0;
jbe@105 533 handle->readbufout = 0;
jbe@81 534 handle->writeerr = 0;
jbe@81 535 handle->writeleft = 0;
jbe@132 536 handle->flushedleft = 0;
jbe@83 537 handle->writeqin = 0;
jbe@83 538 handle->writeqout = 0;
jbe@81 539 handle->writeqoff = 0;
jbe@103 540 handle->writebufin = 0;
jbe@103 541 handle->writebufout = 0;
jbe@87 542 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 543 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 544 lua_setmetatable(L, -2);
jbe@79 545 lua_newtable(L); // uservalue
jbe@81 546 lua_newtable(L);
jbe@103 547 lua_setfield(L, -2, "writequeue");
jbe@79 548 lua_newtable(L); // public
jbe@107 549 if (handle->addrfam == AF_INET6) {
jbe@107 550 struct sockaddr_in6 addr_in6;
jbe@107 551 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 552 const char *addrstr;
jbe@107 553 addrlen = sizeof(addr_in6);
jbe@107 554 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 555 moonbr_io_errmsg();
jbe@107 556 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 557 }
jbe@107 558 if (addrlen > sizeof(addr_in6)) {
jbe@107 559 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 560 }
jbe@107 561 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 562 if (!addrstr) {
jbe@107 563 moonbr_io_errmsg();
jbe@107 564 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 565 } else {
jbe@107 566 lua_pushstring(L, addrstr);
jbe@107 567 lua_setfield(L, -2, "local_ip6");
jbe@107 568 }
jbe@107 569 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 570 lua_setfield(L, -2, "local_tcpport");
jbe@107 571 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 572 moonbr_io_errmsg();
jbe@107 573 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 574 }
jbe@107 575 if (addrlen > sizeof(addr_in6)) {
jbe@107 576 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 577 }
jbe@107 578 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 579 if (!addrstr) {
jbe@107 580 moonbr_io_errmsg();
jbe@107 581 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 582 } else {
jbe@107 583 lua_pushstring(L, addrstr);
jbe@107 584 lua_setfield(L, -2, "remote_ip6");
jbe@107 585 }
jbe@107 586 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 587 lua_setfield(L, -2, "remote_tcpport");
jbe@107 588 } else if (handle->addrfam == AF_INET) {
jbe@107 589 struct sockaddr_in addr_in;
jbe@107 590 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 591 const char *addrstr;
jbe@107 592 addrlen = sizeof(addr_in);
jbe@107 593 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 594 moonbr_io_errmsg();
jbe@107 595 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 596 }
jbe@107 597 if (addrlen > sizeof(addr_in)) {
jbe@107 598 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 599 }
jbe@107 600 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 601 if (!addrstr) {
jbe@107 602 moonbr_io_errmsg();
jbe@107 603 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 604 } else {
jbe@107 605 lua_pushstring(L, addrstr);
jbe@107 606 lua_setfield(L, -2, "local_ip4");
jbe@107 607 }
jbe@107 608 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 609 lua_setfield(L, -2, "local_tcpport");
jbe@107 610 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 611 moonbr_io_errmsg();
jbe@107 612 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 613 }
jbe@107 614 if (addrlen > sizeof(addr_in)) {
jbe@107 615 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 616 }
jbe@107 617 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 618 if (!addrstr) {
jbe@107 619 moonbr_io_errmsg();
jbe@107 620 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 621 } else {
jbe@107 622 lua_pushstring(L, addrstr);
jbe@107 623 lua_setfield(L, -2, "remote_ip4");
jbe@107 624 }
jbe@107 625 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 626 lua_setfield(L, -2, "remote_tcpport");
jbe@107 627 }
jbe@79 628 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 629 lua_setmetatable(L, -2);
jbe@79 630 lua_setfield(L, -2, "public");
jbe@79 631 lua_setuservalue(L, -2);
jbe@79 632 }
jbe@79 633
jbe@79 634 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 635 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 636 lua_getuservalue(L, 1);
jbe@79 637 lua_getfield(L, -1, "public");
jbe@79 638 lua_pushvalue(L, 2);
jbe@79 639 lua_gettable(L, -2);
jbe@79 640 return 1;
jbe@79 641 }
jbe@79 642
jbe@79 643 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 644 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 645 lua_getuservalue(L, 1);
jbe@79 646 lua_getfield(L, -1, "public");
jbe@79 647 lua_pushvalue(L, 2);
jbe@79 648 lua_pushvalue(L, 3);
jbe@79 649 lua_settable(L, -3);
jbe@79 650 return 0;
jbe@79 651 }
jbe@79 652
jbe@111 653 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 654 const char *path;
jbe@111 655 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 656 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 657 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 658 ) - 1; /* one byte for termination */
jbe@111 659 int sock;
jbe@111 660 path = luaL_checkstring(L, 1);
jbe@111 661 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 662 strcpy(sockaddr.sun_path, path);
jbe@111 663 sock = socket(
jbe@111 664 PF_LOCAL,
jbe@111 665 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 666 0
jbe@111 667 );
jbe@111 668 if (sock < 0) {
jbe@111 669 moonbr_io_errmsg();
jbe@111 670 lua_pushnil(L);
jbe@111 671 lua_pushstring(L, errmsg);
jbe@111 672 return 2;
jbe@111 673 }
jbe@111 674 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 675 if (!nonblocking && errno == EINTR) {
jbe@111 676 moonbr_io_errmsg();
jbe@111 677 close(sock);
jbe@111 678 lua_pushnil(L);
jbe@111 679 lua_pushstring(L, errmsg);
jbe@111 680 return 2;
jbe@111 681 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 682 moonbr_io_errmsg();
jbe@111 683 lua_pushnil(L);
jbe@111 684 lua_pushstring(L, errmsg);
jbe@111 685 return 2;
jbe@111 686 }
jbe@111 687 }
jbe@111 688 moonbr_io_pushhandle(L, sock);
jbe@111 689 return 1;
jbe@111 690 }
jbe@111 691
jbe@111 692 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 693 return moonbr_io_localconnect_impl(L, 0);
jbe@111 694 }
jbe@111 695
jbe@111 696 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 697 return moonbr_io_localconnect_impl(L, 1);
jbe@111 698 }
jbe@111 699
jbe@99 700 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 701 const char *host, *port;
jbe@98 702 struct addrinfo hints = { 0, };
jbe@98 703 struct addrinfo *res, *addrinfo;
jbe@98 704 int errcode;
jbe@98 705 int sock;
jbe@98 706 host = luaL_checkstring(L, 1);
jbe@98 707 port = luaL_checkstring(L, 2);
jbe@98 708 hints.ai_family = AF_UNSPEC;
jbe@98 709 hints.ai_socktype = SOCK_STREAM;
jbe@98 710 hints.ai_protocol = IPPROTO_TCP;
jbe@98 711 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 712 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 713 if (errcode) {
jbe@102 714 freeaddrinfo(res);
jbe@98 715 if (errcode == EAI_SYSTEM) {
jbe@98 716 moonbr_io_errmsg();
jbe@98 717 lua_pushnil(L);
jbe@98 718 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 719 } else {
jbe@98 720 lua_pushnil(L);
jbe@98 721 lua_pushstring(L, gai_strerror(errcode));
jbe@98 722 }
jbe@98 723 return 2;
jbe@98 724 }
jbe@98 725 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 726 if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 727 }
jbe@98 728 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98 729 if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 730 }
jbe@98 731 addrinfo = res;
jbe@98 732 moonbr_io_tcpconnect_found:
jbe@99 733 sock = socket(
jbe@99 734 addrinfo->ai_family,
jbe@99 735 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 736 addrinfo->ai_protocol
jbe@99 737 );
jbe@98 738 if (sock < 0) {
jbe@98 739 moonbr_io_errmsg();
jbe@108 740 freeaddrinfo(res);
jbe@98 741 lua_pushnil(L);
jbe@98 742 lua_pushstring(L, errmsg);
jbe@108 743 return 2;
jbe@98 744 }
jbe@98 745 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 746 freeaddrinfo(res);
jbe@99 747 if (!nonblocking && errno == EINTR) {
jbe@99 748 moonbr_io_errmsg();
jbe@99 749 close(sock);
jbe@99 750 lua_pushnil(L);
jbe@99 751 lua_pushstring(L, errmsg);
jbe@99 752 return 2;
jbe@99 753 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 754 moonbr_io_errmsg();
jbe@99 755 lua_pushnil(L);
jbe@99 756 lua_pushstring(L, errmsg);
jbe@99 757 return 2;
jbe@99 758 }
jbe@108 759 } else {
jbe@108 760 freeaddrinfo(res);
jbe@98 761 }
jbe@107 762 moonbr_io_pushhandle(L, sock);
jbe@98 763 return 1;
jbe@98 764 }
jbe@98 765
jbe@99 766 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 767 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 768 }
jbe@99 769
jbe@99 770 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 771 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 772 }
jbe@99 773
jbe@112 774 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 775 moonbr_io_listener_t *listener;
jbe@112 776 const char *path;
jbe@118 777 struct stat sb;
jbe@112 778 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 779 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 780 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 781 ) - 1; /* one byte for termination */
jbe@112 782 int sock;
jbe@112 783 path = luaL_checkstring(L, 1);
jbe@112 784 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 785 strcpy(sockaddr.sun_path, path);
jbe@118 786 if (stat(path, &sb) == 0) {
jbe@118 787 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 788 }
jbe@112 789 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 790 listener->fd = -1;
jbe@112 791 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 792 sock = socket(
jbe@112 793 PF_LOCAL,
jbe@112 794 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 795 0
jbe@112 796 );
jbe@112 797 if (sock < 0) {
jbe@112 798 moonbr_io_errmsg();
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 (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
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 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 811 moonbr_io_errmsg();
jbe@112 812 close(sock);
jbe@112 813 lua_pushnil(L);
jbe@112 814 lua_pushstring(L, errmsg);
jbe@112 815 return 2;
jbe@112 816 }
jbe@112 817 listener->fd = sock;
jbe@118 818 listener->addrfam = AF_LOCAL;
jbe@112 819 listener->nonblocking = -1;
jbe@112 820 return 1;
jbe@112 821 }
jbe@112 822
jbe@108 823 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 824 moonbr_io_listener_t *listener;
jbe@108 825 const char *host, *port;
jbe@108 826 struct addrinfo hints = { 0, };
jbe@108 827 struct addrinfo *res, *addrinfo;
jbe@108 828 int errcode;
jbe@108 829 int sock;
jbe@108 830 host = luaL_optstring(L, 1, NULL);
jbe@108 831 port = luaL_checkstring(L, 2);
jbe@108 832 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 833 listener->fd = -1;
jbe@108 834 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 835 hints.ai_family = AF_UNSPEC;
jbe@108 836 hints.ai_socktype = SOCK_STREAM;
jbe@108 837 hints.ai_protocol = IPPROTO_TCP;
jbe@108 838 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 839 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 840 if (errcode) {
jbe@108 841 freeaddrinfo(res);
jbe@108 842 if (errcode == EAI_SYSTEM) {
jbe@108 843 moonbr_io_errmsg();
jbe@108 844 lua_pushnil(L);
jbe@108 845 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 846 } else {
jbe@108 847 lua_pushnil(L);
jbe@108 848 lua_pushstring(L, gai_strerror(errcode));
jbe@108 849 }
jbe@108 850 return 2;
jbe@108 851 }
jbe@108 852 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@108 853 if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 854 }
jbe@108 855 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@108 856 if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 857 }
jbe@108 858 addrinfo = res;
jbe@108 859 moonbr_io_tcpconnect_found:
jbe@118 860 listener->addrfam = addrinfo->ai_family;
jbe@108 861 sock = socket(
jbe@108 862 addrinfo->ai_family,
jbe@108 863 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 864 addrinfo->ai_protocol
jbe@108 865 );
jbe@108 866 if (sock < 0) {
jbe@108 867 moonbr_io_errmsg();
jbe@108 868 freeaddrinfo(res);
jbe@108 869 lua_pushnil(L);
jbe@108 870 lua_pushstring(L, errmsg);
jbe@108 871 return 2;
jbe@108 872 }
jbe@120 873 {
jbe@120 874 static const int reuseval = 1;
jbe@120 875 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 876 moonbr_io_errmsg();
jbe@120 877 freeaddrinfo(res);
jbe@120 878 close(sock);
jbe@120 879 lua_pushnil(L);
jbe@120 880 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 881 return 2;
jbe@120 882 }
jbe@120 883 }
jbe@108 884 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 885 moonbr_io_errmsg();
jbe@108 886 freeaddrinfo(res);
jbe@108 887 close(sock);
jbe@108 888 lua_pushnil(L);
jbe@108 889 lua_pushstring(L, errmsg);
jbe@108 890 return 2;
jbe@108 891 }
jbe@108 892 freeaddrinfo(res);
jbe@108 893 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 894 moonbr_io_errmsg();
jbe@108 895 close(sock);
jbe@108 896 lua_pushnil(L);
jbe@108 897 lua_pushstring(L, errmsg);
jbe@108 898 return 2;
jbe@108 899 }
jbe@108 900 listener->fd = sock;
jbe@108 901 listener->nonblocking = -1;
jbe@108 902 return 1;
jbe@108 903 }
jbe@108 904
jbe@108 905 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 906 moonbr_io_listener_t *listener;
jbe@108 907 int fd;
jbe@108 908 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 909 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 910 if (listener->nonblocking != nonblocking) {
jbe@108 911 int flags;
jbe@108 912 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 913 if (flags == -1) {
jbe@108 914 moonbr_io_errmsg();
jbe@108 915 close(listener->fd);
jbe@108 916 listener->fd = -1;
jbe@108 917 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 918 }
jbe@108 919 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 920 else flags &= ~O_NONBLOCK;
jbe@108 921 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 922 moonbr_io_errmsg();
jbe@108 923 close(listener->fd);
jbe@108 924 listener->fd = -1;
jbe@108 925 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 926 }
jbe@108 927 listener->nonblocking = nonblocking;
jbe@108 928 }
jbe@108 929 while (1) {
jbe@108 930 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 931 if (fd < 0) {
jbe@108 932 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 933 lua_pushboolean(L, 0);
jbe@108 934 lua_pushliteral(L, "No incoming connection pending");
jbe@108 935 return 2;
jbe@108 936 } else if (errno != EINTR) {
jbe@108 937 moonbr_io_errmsg();
jbe@108 938 lua_pushnil(L);
jbe@108 939 lua_pushstring(L, errmsg);
jbe@108 940 return 2;
jbe@108 941 }
jbe@108 942 } else {
jbe@108 943 moonbr_io_pushhandle(L, fd);
jbe@108 944 return 1;
jbe@108 945 }
jbe@108 946 }
jbe@108 947 }
jbe@108 948
jbe@108 949 static int moonbr_io_accept(lua_State *L) {
jbe@108 950 return moonbr_io_accept_impl(L, 0);
jbe@108 951 }
jbe@108 952
jbe@108 953 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 954 return moonbr_io_accept_impl(L, 1);
jbe@108 955 }
jbe@108 956
jbe@108 957 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 958 moonbr_io_listener_t *listener;
jbe@118 959 struct sockaddr_un addr;
jbe@118 960 socklen_t addrlen;
jbe@118 961 struct stat sb;
jbe@108 962 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 963 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 964 addrlen = sizeof(addr);
jbe@118 965 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 966 if (close(listener->fd)) {
jbe@108 967 moonbr_io_errmsg();
jbe@108 968 listener->fd = -1;
jbe@118 969 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 970 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 971 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 972 }
jbe@118 973 }
jbe@108 974 lua_pushnil(L);
jbe@108 975 lua_pushstring(L, errmsg);
jbe@108 976 return 2;
jbe@108 977 }
jbe@108 978 listener->fd = -1;
jbe@118 979 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 980 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 981 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 982 }
jbe@118 983 }
jbe@108 984 lua_pushboolean(L, 1);
jbe@108 985 return 1;
jbe@108 986 }
jbe@108 987
jbe@108 988 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 989 moonbr_io_listener_t *listener;
jbe@108 990 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 991 if (listener->fd >= 0) close(listener->fd);
jbe@108 992 listener->fd = -1;
jbe@108 993 return 0;
jbe@108 994 }
jbe@108 995
jbe@106 996 static int moonbr_io_poll(lua_State *L) {
jbe@106 997 moonbr_io_handle_t *handle;
jbe@108 998 moonbr_io_listener_t *listener;
jbe@106 999 int fd, isnum;
jbe@106 1000 int nfds = 0;
jbe@106 1001 fd_set readfds, writefds, exceptfds;
jbe@106 1002 struct timeval timeout = {0, };
jbe@106 1003 int status;
jbe@106 1004 FD_ZERO(&readfds);
jbe@106 1005 FD_ZERO(&writefds);
jbe@106 1006 FD_ZERO(&exceptfds);
jbe@106 1007 if (!lua_isnoneornil(L, 1)) {
jbe@106 1008 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1009 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1010 if (lua_toboolean(L, -1)) {
jbe@106 1011 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1012 if (handle) {
jbe@109 1013 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1014 fd = handle->fd;
jbe@122 1015 if (
jbe@122 1016 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1017 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1018 ) {
jbe@109 1019 lua_pushboolean(L, 1);
jbe@109 1020 return 1;
jbe@109 1021 }
jbe@106 1022 } else {
jbe@108 1023 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1024 if (listener) {
jbe@108 1025 fd = listener->fd;
jbe@108 1026 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1027 } else {
jbe@108 1028 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1029 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1030 }
jbe@106 1031 }
jbe@106 1032 FD_SET(fd, &readfds);
jbe@106 1033 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1034 }
jbe@106 1035 }
jbe@106 1036 }
jbe@106 1037 if (!lua_isnoneornil(L, 2)) {
jbe@106 1038 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1039 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1040 if (lua_toboolean(L, -1)) {
jbe@106 1041 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1042 if (handle) {
jbe@109 1043 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1044 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1045 fd = handle->fd;
jbe@106 1046 } else {
jbe@108 1047 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1048 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1049 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1050 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1051 }
jbe@106 1052 FD_SET(fd, &writefds);
jbe@106 1053 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1054 }
jbe@106 1055 }
jbe@106 1056 }
jbe@106 1057 if (!lua_isnoneornil(L, 3)) {
jbe@106 1058 lua_Number n;
jbe@106 1059 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1060 if (isnum && n>=0 && n<100000000) {
jbe@106 1061 timeout.tv_sec = n;
jbe@106 1062 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1063 } else {
jbe@106 1064 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1065 }
jbe@106 1066 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1067 } else {
jbe@106 1068 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1069 }
jbe@106 1070 if (status == -1) {
jbe@106 1071 if (errno == EINTR) {
jbe@106 1072 lua_pushboolean(L, 0);
jbe@106 1073 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1074 return 2;
jbe@106 1075 } else {
jbe@106 1076 moonbr_io_errmsg();
jbe@106 1077 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1078 }
jbe@106 1079 } else if (status == 0) {
jbe@106 1080 lua_pushboolean(L, 0);
jbe@106 1081 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1082 return 2;
jbe@106 1083 } else {
jbe@106 1084 lua_pushboolean(L, 1);
jbe@106 1085 return 1;
jbe@106 1086 }
jbe@106 1087 }
jbe@106 1088
jbe@115 1089 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1090 lua_Number sub;
jbe@115 1091 struct timespec tp;
jbe@115 1092 sub = luaL_optnumber(L, 1, 0);
jbe@115 1093 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1094 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1095 }
jbe@115 1096 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1097 return 1;
jbe@115 1098 }
jbe@115 1099
jbe@79 1100 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1101 {"read", moonbr_io_read},
jbe@85 1102 {"read_nb", moonbr_io_read_nb},
jbe@86 1103 {"drain", moonbr_io_drain},
jbe@86 1104 {"drain_nb", moonbr_io_drain_nb},
jbe@80 1105 {"write", moonbr_io_write},
jbe@81 1106 {"write_nb", moonbr_io_write_nb},
jbe@80 1107 {"flush", moonbr_io_flush},
jbe@81 1108 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1109 {"finish", moonbr_io_finish},
jbe@87 1110 {"close", moonbr_io_close},
jbe@85 1111 {"reset", moonbr_io_reset},
jbe@79 1112 {NULL, NULL}
jbe@79 1113 };
jbe@79 1114
jbe@79 1115 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1116 {"__index", moonbr_io_handleindex},
jbe@79 1117 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1118 {"__gc", moonbr_io_handlegc},
jbe@108 1119 {NULL, NULL}
jbe@108 1120 };
jbe@108 1121
jbe@108 1122 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1123 {"accept", moonbr_io_accept},
jbe@108 1124 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1125 {"close", moonbr_io_unlisten},
jbe@108 1126 {NULL, NULL}
jbe@108 1127 };
jbe@108 1128
jbe@108 1129 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1130 {"__gc", moonbr_io_listenergc},
jbe@79 1131 {NULL, NULL}
jbe@79 1132 };
jbe@79 1133
jbe@79 1134 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1135 {"localconnect", moonbr_io_localconnect},
jbe@111 1136 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1137 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1138 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1139 {"locallisten", moonbr_io_locallisten},
jbe@108 1140 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1141 {"poll", moonbr_io_poll},
jbe@115 1142 {"timeref", moonbr_io_timeref},
jbe@79 1143 {NULL, NULL}
jbe@79 1144 };
jbe@79 1145
jbe@79 1146 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1147
jbe@113 1148 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1149
jbe@80 1150 lua_newtable(L); // module
jbe@80 1151
jbe@79 1152 lua_newtable(L); // public metatable
jbe@79 1153 lua_newtable(L); // handle methods
jbe@79 1154 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1155 lua_pushvalue(L, -1);
jbe@108 1156 lua_setfield(L, -4, "prototype_handle");
jbe@79 1157 lua_setfield(L, -2, "__index");
jbe@79 1158 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1159
jbe@79 1160 lua_newtable(L); // handle metatable
jbe@79 1161 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1162 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1163
jbe@108 1164 lua_newtable(L); // listener metatable
jbe@108 1165 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1166 lua_newtable(L); // listener methods
jbe@108 1167 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1168 lua_pushvalue(L, -1);
jbe@108 1169 lua_setfield(L, -4, "prototype_listener");
jbe@108 1170 lua_setfield(L, -2, "__index");
jbe@108 1171 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1172
jbe@79 1173 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1174 return 1;
jbe@79 1175
jbe@79 1176 }
jbe@79 1177

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