moonbridge

annotate moonbridge_io.c @ 134:11269ec33cd7

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Proper distinction between AF_* and PF_* constants (and commented where it is not the case)
author jbe
date Thu Apr 16 21:12:29 2015 +0200 (2015-04-16)
parents 891cdc4b43eb
children 795bc86be569
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@133 111 static inline 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@83 292 while (handle->writeqout != handle->writeqin) {
jbe@83 293 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 294 str = lua_tolstring(L, -1, &strlen);
jbe@92 295 while (handle->writeqoff < strlen) {
jbe@103 296 if (
jbe@132 297 strlen - handle->writeqoff <
jbe@103 298 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 299 ) {
jbe@103 300 memcpy(
jbe@103 301 handle->writebuf + handle->writebufin,
jbe@103 302 str + handle->writeqoff,
jbe@103 303 strlen - handle->writeqoff
jbe@103 304 );
jbe@103 305 handle->writebufin += strlen - handle->writeqoff;
jbe@80 306 break;
jbe@80 307 } else {
jbe@103 308 memcpy(
jbe@103 309 handle->writebuf + handle->writebufin,
jbe@103 310 str + handle->writeqoff,
jbe@103 311 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 312 );
jbe@103 313 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 314 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 315 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 316 written = write(
jbe@103 317 handle->fd,
jbe@103 318 handle->writebuf + handle->writebufout,
jbe@103 319 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 320 );
jbe@103 321 if (written < 0) {
jbe@81 322 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 323 goto moonbr_io_write_impl_block;
jbe@81 324 } else if (errno != EINTR) {
jbe@80 325 moonbr_io_errmsg();
jbe@80 326 lua_pushnil(L);
jbe@80 327 lua_pushstring(L, errmsg);
jbe@80 328 return 2;
jbe@80 329 }
jbe@103 330 } else {
jbe@103 331 handle->writebufout += written;
jbe@103 332 handle->writeleft -= written;
jbe@133 333 if (handle->flushedleft) {
jbe@133 334 if (written >= handle->flushedleft) {
jbe@133 335 handle->flushedleft = 0;
jbe@133 336 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 337 } else {
jbe@133 338 handle->flushedleft -= written;
jbe@133 339 }
jbe@133 340 }
jbe@80 341 }
jbe@80 342 }
jbe@103 343 handle->writebufin = 0;
jbe@103 344 handle->writebufout = 0;
jbe@80 345 }
jbe@80 346 }
jbe@81 347 handle->writeqoff = 0;
jbe@81 348 lua_pop(L, 1);
jbe@81 349 lua_pushnil(L);
jbe@83 350 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 351 }
jbe@132 352 while (handle->flushedleft) {
jbe@133 353 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 354 written = write(
jbe@132 355 handle->fd,
jbe@132 356 handle->writebuf + handle->writebufout,
jbe@132 357 handle->writebufin - handle->writebufout
jbe@132 358 );
jbe@132 359 if (written < 0) {
jbe@132 360 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 361 goto moonbr_io_write_impl_block;
jbe@132 362 } else if (errno != EINTR) {
jbe@132 363 moonbr_io_errmsg();
jbe@132 364 lua_pushnil(L);
jbe@132 365 lua_pushstring(L, errmsg);
jbe@132 366 return 2;
jbe@81 367 }
jbe@132 368 } else {
jbe@132 369 handle->writebufout += written;
jbe@132 370 handle->writeleft -= written;
jbe@133 371 if (handle->flushedleft) {
jbe@133 372 if (written >= handle->flushedleft) {
jbe@133 373 handle->flushedleft = 0;
jbe@133 374 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 375 } else {
jbe@133 376 handle->flushedleft -= written;
jbe@133 377 }
jbe@133 378 }
jbe@81 379 }
jbe@132 380 }
jbe@132 381 if (handle->writebufout == handle->writebufin) {
jbe@103 382 handle->writebufin = 0;
jbe@103 383 handle->writebufout = 0;
jbe@81 384 }
jbe@103 385 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 386 else lua_pushvalue(L, 1);
jbe@103 387 handle->writeerr = 0;
jbe@80 388 return 1;
jbe@81 389 moonbr_io_write_impl_block:
jbe@91 390 lua_pushinteger(L, handle->writeleft);
jbe@103 391 handle->writeerr = 0;
jbe@81 392 return 1;
jbe@81 393 }
jbe@81 394
jbe@81 395 static int moonbr_io_write(lua_State *L) {
jbe@81 396 return moonbr_io_write_impl(L, 0, 0);
jbe@81 397 }
jbe@81 398
jbe@81 399 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 400 return moonbr_io_write_impl(L, 1, 0);
jbe@80 401 }
jbe@80 402
jbe@80 403 static int moonbr_io_flush(lua_State *L) {
jbe@81 404 return moonbr_io_write_impl(L, 0, 1);
jbe@81 405 }
jbe@81 406
jbe@81 407 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 408 return moonbr_io_write_impl(L, 1, 1);
jbe@80 409 }
jbe@80 410
jbe@88 411 static int moonbr_io_finish(lua_State *L) {
jbe@88 412 moonbr_io_handle_t *handle;
jbe@88 413 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 414 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 415 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 416 if (handle->writeleft) {
jbe@94 417 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 418 lua_pushvalue(L, 1);
jbe@116 419 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 420 handle->finished = 1;
jbe@116 421 lua_error(L);
jbe@116 422 }
jbe@94 423 if (!lua_toboolean(L, -2)) {
jbe@94 424 handle->finished = 1;
jbe@94 425 return 2;
jbe@88 426 }
jbe@94 427 }
jbe@94 428 handle->finished = 1;
jbe@107 429 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 430 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 431 moonbr_io_errmsg();
jbe@88 432 lua_pushnil(L);
jbe@88 433 lua_pushstring(L, errmsg);
jbe@88 434 return 2;
jbe@88 435 }
jbe@94 436 } else {
jbe@94 437 if (close(handle->fd)) {
jbe@94 438 moonbr_io_errmsg();
jbe@94 439 handle->fd = -1;
jbe@94 440 lua_pushnil(L);
jbe@94 441 lua_pushstring(L, errmsg);
jbe@94 442 return 2;
jbe@94 443 }
jbe@94 444 handle->fd = -1; /* fake EOF on read */
jbe@88 445 }
jbe@88 446 lua_pushboolean(L, 1);
jbe@88 447 return 1;
jbe@88 448 }
jbe@88 449
jbe@94 450 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 451 moonbr_io_handle_t *handle;
jbe@83 452 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 453 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 454 if (!reset) {
jbe@87 455 if (handle->writeleft) {
jbe@87 456 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 457 lua_pushvalue(L, 1);
jbe@116 458 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 459 handle->closed = 1;
jbe@116 460 close(handle->fd);
jbe@116 461 handle->fd = -1;
jbe@116 462 lua_error(L);
jbe@116 463 }
jbe@129 464 handle->closed = 1;
jbe@87 465 if (!lua_toboolean(L, -2)) {
jbe@87 466 close(handle->fd);
jbe@87 467 handle->fd = -1;
jbe@87 468 return 2;
jbe@87 469 }
jbe@129 470 } else {
jbe@129 471 handle->closed = 1;
jbe@129 472 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 473 }
jbe@129 474 } else {
jbe@129 475 handle->closed = 1;
jbe@83 476 }
jbe@94 477 if (handle->fd >= 0) {
jbe@94 478 if (close(handle->fd)) {
jbe@94 479 moonbr_io_errmsg();
jbe@94 480 handle->fd = -1;
jbe@94 481 lua_pushnil(L);
jbe@94 482 lua_pushstring(L, errmsg);
jbe@94 483 return 2;
jbe@94 484 }
jbe@104 485 handle->fd = -1;
jbe@83 486 }
jbe@83 487 lua_pushboolean(L, 1);
jbe@83 488 return 1;
jbe@84 489
jbe@83 490 }
jbe@83 491
jbe@94 492 static int moonbr_io_close(lua_State *L) {
jbe@94 493 return moonbr_io_close_impl(L, 0);
jbe@94 494 }
jbe@94 495
jbe@84 496 static int moonbr_io_reset(lua_State *L) {
jbe@94 497 return moonbr_io_close_impl(L, 1);
jbe@84 498 }
jbe@84 499
jbe@108 500 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 501 moonbr_io_handle_t *handle;
jbe@88 502 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 503 if (handle->fd >= 0) {
jbe@88 504 lua_pushcfunction(L, moonbr_io_close);
jbe@88 505 lua_pushvalue(L, 1);
jbe@88 506 lua_pushinteger(L, 0);
jbe@88 507 lua_call(L, 2, 0);
jbe@88 508 }
jbe@88 509 return 0;
jbe@88 510 }
jbe@88 511
jbe@100 512 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 513 moonbr_io_handle_t *handle;
jbe@88 514 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 515 if (!handle->closed) {
jbe@100 516 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 517 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 518 lua_call(L, 1, 0);
jbe@88 519 }
jbe@88 520 }
jbe@88 521
jbe@107 522 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 523 moonbr_io_handle_t *handle;
jbe@107 524 struct sockaddr addr;
jbe@107 525 socklen_t addrlen;
jbe@79 526 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 527 handle->fd = fd;
jbe@107 528 addrlen = sizeof(addr);
jbe@107 529 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 530 if (errno != ENOTSOCK) {
jbe@107 531 moonbr_io_errmsg();
jbe@107 532 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 533 }
jbe@107 534 handle->issock = 0;
jbe@107 535 } else {
jbe@107 536 handle->issock = 1;
jbe@107 537 handle->addrfam = addr.sa_family;
jbe@107 538 }
jbe@94 539 handle->finished = 0;
jbe@94 540 handle->closed = 0;
jbe@81 541 handle->nonblocking = -1;
jbe@95 542 handle->nopush = -1;
jbe@85 543 handle->readerr = 0;
jbe@105 544 handle->readbufin = 0;
jbe@105 545 handle->readbufout = 0;
jbe@81 546 handle->writeerr = 0;
jbe@81 547 handle->writeleft = 0;
jbe@132 548 handle->flushedleft = 0;
jbe@83 549 handle->writeqin = 0;
jbe@83 550 handle->writeqout = 0;
jbe@81 551 handle->writeqoff = 0;
jbe@103 552 handle->writebufin = 0;
jbe@103 553 handle->writebufout = 0;
jbe@87 554 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 555 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 556 lua_setmetatable(L, -2);
jbe@79 557 lua_newtable(L); // uservalue
jbe@81 558 lua_newtable(L);
jbe@103 559 lua_setfield(L, -2, "writequeue");
jbe@79 560 lua_newtable(L); // public
jbe@107 561 if (handle->addrfam == AF_INET6) {
jbe@107 562 struct sockaddr_in6 addr_in6;
jbe@107 563 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 564 const char *addrstr;
jbe@107 565 addrlen = sizeof(addr_in6);
jbe@107 566 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 567 moonbr_io_errmsg();
jbe@107 568 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 569 }
jbe@107 570 if (addrlen > sizeof(addr_in6)) {
jbe@107 571 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 572 }
jbe@107 573 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 574 if (!addrstr) {
jbe@107 575 moonbr_io_errmsg();
jbe@107 576 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 577 } else {
jbe@107 578 lua_pushstring(L, addrstr);
jbe@107 579 lua_setfield(L, -2, "local_ip6");
jbe@107 580 }
jbe@107 581 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 582 lua_setfield(L, -2, "local_tcpport");
jbe@107 583 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 584 moonbr_io_errmsg();
jbe@107 585 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 586 }
jbe@107 587 if (addrlen > sizeof(addr_in6)) {
jbe@107 588 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 589 }
jbe@107 590 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 591 if (!addrstr) {
jbe@107 592 moonbr_io_errmsg();
jbe@107 593 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 594 } else {
jbe@107 595 lua_pushstring(L, addrstr);
jbe@107 596 lua_setfield(L, -2, "remote_ip6");
jbe@107 597 }
jbe@107 598 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 599 lua_setfield(L, -2, "remote_tcpport");
jbe@107 600 } else if (handle->addrfam == AF_INET) {
jbe@107 601 struct sockaddr_in addr_in;
jbe@107 602 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 603 const char *addrstr;
jbe@107 604 addrlen = sizeof(addr_in);
jbe@107 605 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 606 moonbr_io_errmsg();
jbe@107 607 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 608 }
jbe@107 609 if (addrlen > sizeof(addr_in)) {
jbe@107 610 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 611 }
jbe@107 612 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 613 if (!addrstr) {
jbe@107 614 moonbr_io_errmsg();
jbe@107 615 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 616 } else {
jbe@107 617 lua_pushstring(L, addrstr);
jbe@107 618 lua_setfield(L, -2, "local_ip4");
jbe@107 619 }
jbe@107 620 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 621 lua_setfield(L, -2, "local_tcpport");
jbe@107 622 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 623 moonbr_io_errmsg();
jbe@107 624 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 625 }
jbe@107 626 if (addrlen > sizeof(addr_in)) {
jbe@107 627 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 628 }
jbe@107 629 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 630 if (!addrstr) {
jbe@107 631 moonbr_io_errmsg();
jbe@107 632 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 633 } else {
jbe@107 634 lua_pushstring(L, addrstr);
jbe@107 635 lua_setfield(L, -2, "remote_ip4");
jbe@107 636 }
jbe@107 637 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 638 lua_setfield(L, -2, "remote_tcpport");
jbe@107 639 }
jbe@79 640 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 641 lua_setmetatable(L, -2);
jbe@79 642 lua_setfield(L, -2, "public");
jbe@79 643 lua_setuservalue(L, -2);
jbe@79 644 }
jbe@79 645
jbe@79 646 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 647 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 648 lua_getuservalue(L, 1);
jbe@79 649 lua_getfield(L, -1, "public");
jbe@79 650 lua_pushvalue(L, 2);
jbe@79 651 lua_gettable(L, -2);
jbe@79 652 return 1;
jbe@79 653 }
jbe@79 654
jbe@79 655 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 656 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 657 lua_getuservalue(L, 1);
jbe@79 658 lua_getfield(L, -1, "public");
jbe@79 659 lua_pushvalue(L, 2);
jbe@79 660 lua_pushvalue(L, 3);
jbe@79 661 lua_settable(L, -3);
jbe@79 662 return 0;
jbe@79 663 }
jbe@79 664
jbe@111 665 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 666 const char *path;
jbe@111 667 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 668 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 669 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 670 ) - 1; /* one byte for termination */
jbe@111 671 int sock;
jbe@111 672 path = luaL_checkstring(L, 1);
jbe@111 673 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 674 strcpy(sockaddr.sun_path, path);
jbe@111 675 sock = socket(
jbe@111 676 PF_LOCAL,
jbe@111 677 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 678 0
jbe@111 679 );
jbe@111 680 if (sock < 0) {
jbe@111 681 moonbr_io_errmsg();
jbe@111 682 lua_pushnil(L);
jbe@111 683 lua_pushstring(L, errmsg);
jbe@111 684 return 2;
jbe@111 685 }
jbe@111 686 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 687 if (!nonblocking && errno == EINTR) {
jbe@111 688 moonbr_io_errmsg();
jbe@111 689 close(sock);
jbe@111 690 lua_pushnil(L);
jbe@111 691 lua_pushstring(L, errmsg);
jbe@111 692 return 2;
jbe@111 693 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 694 moonbr_io_errmsg();
jbe@111 695 lua_pushnil(L);
jbe@111 696 lua_pushstring(L, errmsg);
jbe@111 697 return 2;
jbe@111 698 }
jbe@111 699 }
jbe@111 700 moonbr_io_pushhandle(L, sock);
jbe@111 701 return 1;
jbe@111 702 }
jbe@111 703
jbe@111 704 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 705 return moonbr_io_localconnect_impl(L, 0);
jbe@111 706 }
jbe@111 707
jbe@111 708 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 709 return moonbr_io_localconnect_impl(L, 1);
jbe@111 710 }
jbe@111 711
jbe@99 712 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 713 const char *host, *port;
jbe@98 714 struct addrinfo hints = { 0, };
jbe@98 715 struct addrinfo *res, *addrinfo;
jbe@98 716 int errcode;
jbe@98 717 int sock;
jbe@98 718 host = luaL_checkstring(L, 1);
jbe@98 719 port = luaL_checkstring(L, 2);
jbe@98 720 hints.ai_family = AF_UNSPEC;
jbe@98 721 hints.ai_socktype = SOCK_STREAM;
jbe@98 722 hints.ai_protocol = IPPROTO_TCP;
jbe@98 723 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 724 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 725 if (errcode) {
jbe@102 726 freeaddrinfo(res);
jbe@98 727 if (errcode == EAI_SYSTEM) {
jbe@98 728 moonbr_io_errmsg();
jbe@98 729 lua_pushnil(L);
jbe@98 730 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 731 } else {
jbe@98 732 lua_pushnil(L);
jbe@98 733 lua_pushstring(L, gai_strerror(errcode));
jbe@98 734 }
jbe@98 735 return 2;
jbe@98 736 }
jbe@98 737 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 738 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 739 }
jbe@98 740 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 741 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 742 }
jbe@98 743 addrinfo = res;
jbe@98 744 moonbr_io_tcpconnect_found:
jbe@99 745 sock = socket(
jbe@134 746 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 747 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 748 addrinfo->ai_protocol
jbe@99 749 );
jbe@98 750 if (sock < 0) {
jbe@98 751 moonbr_io_errmsg();
jbe@108 752 freeaddrinfo(res);
jbe@98 753 lua_pushnil(L);
jbe@98 754 lua_pushstring(L, errmsg);
jbe@108 755 return 2;
jbe@98 756 }
jbe@98 757 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 758 freeaddrinfo(res);
jbe@99 759 if (!nonblocking && errno == EINTR) {
jbe@99 760 moonbr_io_errmsg();
jbe@99 761 close(sock);
jbe@99 762 lua_pushnil(L);
jbe@99 763 lua_pushstring(L, errmsg);
jbe@99 764 return 2;
jbe@99 765 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 766 moonbr_io_errmsg();
jbe@99 767 lua_pushnil(L);
jbe@99 768 lua_pushstring(L, errmsg);
jbe@99 769 return 2;
jbe@99 770 }
jbe@108 771 } else {
jbe@108 772 freeaddrinfo(res);
jbe@98 773 }
jbe@107 774 moonbr_io_pushhandle(L, sock);
jbe@98 775 return 1;
jbe@98 776 }
jbe@98 777
jbe@99 778 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 779 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 780 }
jbe@99 781
jbe@99 782 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 783 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 784 }
jbe@99 785
jbe@112 786 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 787 moonbr_io_listener_t *listener;
jbe@112 788 const char *path;
jbe@118 789 struct stat sb;
jbe@112 790 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 791 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 792 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 793 ) - 1; /* one byte for termination */
jbe@112 794 int sock;
jbe@112 795 path = luaL_checkstring(L, 1);
jbe@112 796 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 797 strcpy(sockaddr.sun_path, path);
jbe@118 798 if (stat(path, &sb) == 0) {
jbe@118 799 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 800 }
jbe@112 801 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 802 listener->fd = -1;
jbe@112 803 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 804 sock = socket(
jbe@112 805 PF_LOCAL,
jbe@112 806 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 807 0
jbe@112 808 );
jbe@112 809 if (sock < 0) {
jbe@112 810 moonbr_io_errmsg();
jbe@112 811 lua_pushnil(L);
jbe@112 812 lua_pushstring(L, errmsg);
jbe@112 813 return 2;
jbe@112 814 }
jbe@112 815 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 816 moonbr_io_errmsg();
jbe@112 817 close(sock);
jbe@112 818 lua_pushnil(L);
jbe@112 819 lua_pushstring(L, errmsg);
jbe@112 820 return 2;
jbe@112 821 }
jbe@112 822 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 823 moonbr_io_errmsg();
jbe@112 824 close(sock);
jbe@112 825 lua_pushnil(L);
jbe@112 826 lua_pushstring(L, errmsg);
jbe@112 827 return 2;
jbe@112 828 }
jbe@112 829 listener->fd = sock;
jbe@118 830 listener->addrfam = AF_LOCAL;
jbe@112 831 listener->nonblocking = -1;
jbe@112 832 return 1;
jbe@112 833 }
jbe@112 834
jbe@108 835 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 836 moonbr_io_listener_t *listener;
jbe@108 837 const char *host, *port;
jbe@108 838 struct addrinfo hints = { 0, };
jbe@108 839 struct addrinfo *res, *addrinfo;
jbe@108 840 int errcode;
jbe@108 841 int sock;
jbe@108 842 host = luaL_optstring(L, 1, NULL);
jbe@108 843 port = luaL_checkstring(L, 2);
jbe@108 844 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 845 listener->fd = -1;
jbe@108 846 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 847 hints.ai_family = AF_UNSPEC;
jbe@108 848 hints.ai_socktype = SOCK_STREAM;
jbe@108 849 hints.ai_protocol = IPPROTO_TCP;
jbe@108 850 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 851 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 852 if (errcode) {
jbe@108 853 freeaddrinfo(res);
jbe@108 854 if (errcode == EAI_SYSTEM) {
jbe@108 855 moonbr_io_errmsg();
jbe@108 856 lua_pushnil(L);
jbe@108 857 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 858 } else {
jbe@108 859 lua_pushnil(L);
jbe@108 860 lua_pushstring(L, gai_strerror(errcode));
jbe@108 861 }
jbe@108 862 return 2;
jbe@108 863 }
jbe@108 864 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 865 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 866 }
jbe@108 867 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 868 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 869 }
jbe@108 870 addrinfo = res;
jbe@108 871 moonbr_io_tcpconnect_found:
jbe@118 872 listener->addrfam = addrinfo->ai_family;
jbe@108 873 sock = socket(
jbe@134 874 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 875 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 876 addrinfo->ai_protocol
jbe@108 877 );
jbe@108 878 if (sock < 0) {
jbe@108 879 moonbr_io_errmsg();
jbe@108 880 freeaddrinfo(res);
jbe@108 881 lua_pushnil(L);
jbe@108 882 lua_pushstring(L, errmsg);
jbe@108 883 return 2;
jbe@108 884 }
jbe@120 885 {
jbe@120 886 static const int reuseval = 1;
jbe@120 887 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 888 moonbr_io_errmsg();
jbe@120 889 freeaddrinfo(res);
jbe@120 890 close(sock);
jbe@120 891 lua_pushnil(L);
jbe@120 892 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 893 return 2;
jbe@120 894 }
jbe@120 895 }
jbe@108 896 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 897 moonbr_io_errmsg();
jbe@108 898 freeaddrinfo(res);
jbe@108 899 close(sock);
jbe@108 900 lua_pushnil(L);
jbe@108 901 lua_pushstring(L, errmsg);
jbe@108 902 return 2;
jbe@108 903 }
jbe@108 904 freeaddrinfo(res);
jbe@108 905 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 906 moonbr_io_errmsg();
jbe@108 907 close(sock);
jbe@108 908 lua_pushnil(L);
jbe@108 909 lua_pushstring(L, errmsg);
jbe@108 910 return 2;
jbe@108 911 }
jbe@108 912 listener->fd = sock;
jbe@108 913 listener->nonblocking = -1;
jbe@108 914 return 1;
jbe@108 915 }
jbe@108 916
jbe@108 917 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 918 moonbr_io_listener_t *listener;
jbe@108 919 int fd;
jbe@108 920 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 921 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 922 if (listener->nonblocking != nonblocking) {
jbe@108 923 int flags;
jbe@108 924 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 925 if (flags == -1) {
jbe@108 926 moonbr_io_errmsg();
jbe@108 927 close(listener->fd);
jbe@108 928 listener->fd = -1;
jbe@108 929 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 930 }
jbe@108 931 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 932 else flags &= ~O_NONBLOCK;
jbe@108 933 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 934 moonbr_io_errmsg();
jbe@108 935 close(listener->fd);
jbe@108 936 listener->fd = -1;
jbe@108 937 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 938 }
jbe@108 939 listener->nonblocking = nonblocking;
jbe@108 940 }
jbe@108 941 while (1) {
jbe@108 942 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 943 if (fd < 0) {
jbe@108 944 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 945 lua_pushboolean(L, 0);
jbe@108 946 lua_pushliteral(L, "No incoming connection pending");
jbe@108 947 return 2;
jbe@108 948 } else if (errno != EINTR) {
jbe@108 949 moonbr_io_errmsg();
jbe@108 950 lua_pushnil(L);
jbe@108 951 lua_pushstring(L, errmsg);
jbe@108 952 return 2;
jbe@108 953 }
jbe@108 954 } else {
jbe@108 955 moonbr_io_pushhandle(L, fd);
jbe@108 956 return 1;
jbe@108 957 }
jbe@108 958 }
jbe@108 959 }
jbe@108 960
jbe@108 961 static int moonbr_io_accept(lua_State *L) {
jbe@108 962 return moonbr_io_accept_impl(L, 0);
jbe@108 963 }
jbe@108 964
jbe@108 965 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 966 return moonbr_io_accept_impl(L, 1);
jbe@108 967 }
jbe@108 968
jbe@108 969 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 970 moonbr_io_listener_t *listener;
jbe@118 971 struct sockaddr_un addr;
jbe@118 972 socklen_t addrlen;
jbe@118 973 struct stat sb;
jbe@108 974 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 975 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 976 addrlen = sizeof(addr);
jbe@118 977 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 978 if (close(listener->fd)) {
jbe@108 979 moonbr_io_errmsg();
jbe@108 980 listener->fd = -1;
jbe@118 981 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 982 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 983 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 984 }
jbe@118 985 }
jbe@108 986 lua_pushnil(L);
jbe@108 987 lua_pushstring(L, errmsg);
jbe@108 988 return 2;
jbe@108 989 }
jbe@108 990 listener->fd = -1;
jbe@118 991 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 992 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 993 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 994 }
jbe@118 995 }
jbe@108 996 lua_pushboolean(L, 1);
jbe@108 997 return 1;
jbe@108 998 }
jbe@108 999
jbe@108 1000 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1001 moonbr_io_listener_t *listener;
jbe@108 1002 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1003 if (listener->fd >= 0) close(listener->fd);
jbe@108 1004 listener->fd = -1;
jbe@108 1005 return 0;
jbe@108 1006 }
jbe@108 1007
jbe@106 1008 static int moonbr_io_poll(lua_State *L) {
jbe@106 1009 moonbr_io_handle_t *handle;
jbe@108 1010 moonbr_io_listener_t *listener;
jbe@106 1011 int fd, isnum;
jbe@106 1012 int nfds = 0;
jbe@106 1013 fd_set readfds, writefds, exceptfds;
jbe@106 1014 struct timeval timeout = {0, };
jbe@106 1015 int status;
jbe@106 1016 FD_ZERO(&readfds);
jbe@106 1017 FD_ZERO(&writefds);
jbe@106 1018 FD_ZERO(&exceptfds);
jbe@106 1019 if (!lua_isnoneornil(L, 1)) {
jbe@106 1020 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1021 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1022 if (lua_toboolean(L, -1)) {
jbe@106 1023 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1024 if (handle) {
jbe@109 1025 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1026 fd = handle->fd;
jbe@122 1027 if (
jbe@122 1028 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1029 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1030 ) {
jbe@109 1031 lua_pushboolean(L, 1);
jbe@109 1032 return 1;
jbe@109 1033 }
jbe@106 1034 } else {
jbe@108 1035 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1036 if (listener) {
jbe@108 1037 fd = listener->fd;
jbe@108 1038 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1039 } else {
jbe@108 1040 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1041 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1042 }
jbe@106 1043 }
jbe@106 1044 FD_SET(fd, &readfds);
jbe@106 1045 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1046 }
jbe@106 1047 }
jbe@106 1048 }
jbe@106 1049 if (!lua_isnoneornil(L, 2)) {
jbe@106 1050 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1051 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1052 if (lua_toboolean(L, -1)) {
jbe@106 1053 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1054 if (handle) {
jbe@109 1055 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1056 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1057 fd = handle->fd;
jbe@106 1058 } else {
jbe@108 1059 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1060 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1061 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1062 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1063 }
jbe@106 1064 FD_SET(fd, &writefds);
jbe@106 1065 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1066 }
jbe@106 1067 }
jbe@106 1068 }
jbe@106 1069 if (!lua_isnoneornil(L, 3)) {
jbe@106 1070 lua_Number n;
jbe@106 1071 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1072 if (isnum && n>=0 && n<100000000) {
jbe@106 1073 timeout.tv_sec = n;
jbe@106 1074 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1075 } else {
jbe@106 1076 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1077 }
jbe@106 1078 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1079 } else {
jbe@106 1080 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1081 }
jbe@106 1082 if (status == -1) {
jbe@106 1083 if (errno == EINTR) {
jbe@106 1084 lua_pushboolean(L, 0);
jbe@106 1085 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1086 return 2;
jbe@106 1087 } else {
jbe@106 1088 moonbr_io_errmsg();
jbe@106 1089 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1090 }
jbe@106 1091 } else if (status == 0) {
jbe@106 1092 lua_pushboolean(L, 0);
jbe@106 1093 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1094 return 2;
jbe@106 1095 } else {
jbe@106 1096 lua_pushboolean(L, 1);
jbe@106 1097 return 1;
jbe@106 1098 }
jbe@106 1099 }
jbe@106 1100
jbe@115 1101 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1102 lua_Number sub;
jbe@115 1103 struct timespec tp;
jbe@115 1104 sub = luaL_optnumber(L, 1, 0);
jbe@115 1105 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1106 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1107 }
jbe@115 1108 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1109 return 1;
jbe@115 1110 }
jbe@115 1111
jbe@79 1112 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1113 {"read", moonbr_io_read},
jbe@85 1114 {"read_nb", moonbr_io_read_nb},
jbe@86 1115 {"drain", moonbr_io_drain},
jbe@86 1116 {"drain_nb", moonbr_io_drain_nb},
jbe@80 1117 {"write", moonbr_io_write},
jbe@81 1118 {"write_nb", moonbr_io_write_nb},
jbe@80 1119 {"flush", moonbr_io_flush},
jbe@81 1120 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1121 {"finish", moonbr_io_finish},
jbe@87 1122 {"close", moonbr_io_close},
jbe@85 1123 {"reset", moonbr_io_reset},
jbe@79 1124 {NULL, NULL}
jbe@79 1125 };
jbe@79 1126
jbe@79 1127 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1128 {"__index", moonbr_io_handleindex},
jbe@79 1129 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1130 {"__gc", moonbr_io_handlegc},
jbe@108 1131 {NULL, NULL}
jbe@108 1132 };
jbe@108 1133
jbe@108 1134 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1135 {"accept", moonbr_io_accept},
jbe@108 1136 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1137 {"close", moonbr_io_unlisten},
jbe@108 1138 {NULL, NULL}
jbe@108 1139 };
jbe@108 1140
jbe@108 1141 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1142 {"__gc", moonbr_io_listenergc},
jbe@79 1143 {NULL, NULL}
jbe@79 1144 };
jbe@79 1145
jbe@79 1146 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1147 {"localconnect", moonbr_io_localconnect},
jbe@111 1148 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1149 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1150 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1151 {"locallisten", moonbr_io_locallisten},
jbe@108 1152 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1153 {"poll", moonbr_io_poll},
jbe@115 1154 {"timeref", moonbr_io_timeref},
jbe@79 1155 {NULL, NULL}
jbe@79 1156 };
jbe@79 1157
jbe@79 1158 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1159
jbe@113 1160 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1161
jbe@80 1162 lua_newtable(L); // module
jbe@80 1163
jbe@79 1164 lua_newtable(L); // public metatable
jbe@79 1165 lua_newtable(L); // handle methods
jbe@79 1166 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1167 lua_pushvalue(L, -1);
jbe@108 1168 lua_setfield(L, -4, "prototype_handle");
jbe@79 1169 lua_setfield(L, -2, "__index");
jbe@79 1170 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1171
jbe@79 1172 lua_newtable(L); // handle metatable
jbe@79 1173 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1174 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1175
jbe@108 1176 lua_newtable(L); // listener metatable
jbe@108 1177 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1178 lua_newtable(L); // listener methods
jbe@108 1179 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1180 lua_pushvalue(L, -1);
jbe@108 1181 lua_setfield(L, -4, "prototype_listener");
jbe@108 1182 lua_setfield(L, -2, "__index");
jbe@108 1183 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1184
jbe@79 1185 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1186 return 1;
jbe@79 1187
jbe@79 1188 }
jbe@79 1189

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