moonbridge

annotate moonbridge_io.c @ 143:41da87a681d6

find changesets by author, revision, files, or words in the commit message
Method "read" always returns two return values
author jbe
date Sat May 02 01:48:29 2015 +0200 (2015-05-02)
parents 8cd9acda3853
children e7fac0918f9c
rev   line source
jbe@79 1
jbe@137 2 #if defined(__linux__)
jbe@137 3 #define _GNU_SOURCE
jbe@137 4 #endif
jbe@79 5 #include <stdlib.h>
jbe@135 6 #include <stdint.h>
jbe@135 7 #include <string.h>
jbe@135 8 #include <errno.h>
jbe@79 9 #include <unistd.h>
jbe@135 10 #include <signal.h>
jbe@135 11 #include <fcntl.h>
jbe@135 12 #include <sys/stat.h>
jbe@79 13 #include <sys/socket.h>
jbe@111 14 #include <sys/un.h>
jbe@95 15 #include <netinet/in.h>
jbe@95 16 #include <netinet/tcp.h>
jbe@135 17 #include <sys/select.h>
jbe@136 18 #include <time.h>
jbe@135 19 #include <netdb.h>
jbe@107 20 #include <arpa/inet.h>
jbe@79 21
jbe@79 22 #include <lua.h>
jbe@79 23 #include <lauxlib.h>
jbe@79 24 #include <lualib.h>
jbe@79 25
jbe@80 26 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 27 #define MOONBR_IO_READBUFLEN 4096
jbe@80 28 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 29
jbe@108 30 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108 31
jbe@80 32 #define moonbr_io_errmsg() \
jbe@80 33 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 34 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 35
jbe@79 36 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 37 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108 38 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@79 39
jbe@79 40 typedef struct {
jbe@79 41 int fd;
jbe@107 42 int issock;
jbe@107 43 sa_family_t addrfam;
jbe@94 44 int finished;
jbe@94 45 int closed;
jbe@81 46 int nonblocking;
jbe@95 47 int nopush;
jbe@85 48 int readerr;
jbe@105 49 int readbufin;
jbe@105 50 int readbufout;
jbe@81 51 int writeerr;
jbe@83 52 size_t writeleft;
jbe@132 53 size_t flushedleft;
jbe@83 54 #if LUA_VERSION_NUM >= 503
jbe@83 55 lua_Integer writeqin;
jbe@83 56 lua_Integer writeqout;
jbe@83 57 #else
jbe@83 58 int writeqin;
jbe@83 59 int writeqout;
jbe@83 60 #endif
jbe@83 61 size_t writeqoff;
jbe@103 62 int writebufin;
jbe@103 63 int writebufout;
jbe@85 64 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 65 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 66 } moonbr_io_handle_t;
jbe@79 67
jbe@108 68 typedef struct {
jbe@108 69 int fd;
jbe@118 70 sa_family_t addrfam;
jbe@108 71 int nonblocking;
jbe@108 72 } moonbr_io_listener_t;
jbe@108 73
jbe@140 74 static int moonbr_io_yield(lua_State *L) {
jbe@140 75 return lua_yield(L, 0);
jbe@140 76 }
jbe@140 77
jbe@140 78 #if LUA_VERSION_NUM >= 503
jbe@140 79 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140 80 #else
jbe@140 81 static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140 82 #endif
jbe@140 83 return lua_gettop(L);
jbe@140 84 }
jbe@140 85
jbe@81 86 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 87 int flags;
jbe@95 88 if (handle->nonblocking == nonblocking) return;
jbe@95 89 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 90 if (flags == -1) {
jbe@95 91 moonbr_io_errmsg();
jbe@96 92 close(handle->fd);
jbe@96 93 handle->fd = -1;
jbe@96 94 handle->closed = 1;
jbe@95 95 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 96 }
jbe@95 97 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 98 else flags &= ~O_NONBLOCK;
jbe@95 99 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 100 moonbr_io_errmsg();
jbe@96 101 close(handle->fd);
jbe@96 102 handle->fd = -1;
jbe@96 103 handle->closed = 1;
jbe@95 104 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 105 }
jbe@95 106 handle->nonblocking = nonblocking;
jbe@81 107 }
jbe@81 108
jbe@87 109 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 110 struct linger lingerval = { 0, };
jbe@107 111 if (!handle->issock) return;
jbe@87 112 if (timeout >= 0) {
jbe@87 113 lingerval.l_onoff = 1;
jbe@87 114 lingerval.l_linger = timeout;
jbe@87 115 }
jbe@87 116 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 117 moonbr_io_errmsg();
jbe@96 118 close(handle->fd);
jbe@96 119 handle->fd = -1;
jbe@96 120 handle->closed = 1;
jbe@95 121 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 122 }
jbe@87 123 }
jbe@87 124
jbe@133 125 static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 126 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 127 if (
jbe@107 128 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 129 handle->nopush == nopush
jbe@107 130 ) return;
jbe@96 131 #if defined(TCP_NOPUSH)
jbe@96 132 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 133 #elif defined(TCP_CORK)
jbe@104 134 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 135 #endif
jbe@96 136 moonbr_io_errmsg();
jbe@96 137 close(handle->fd);
jbe@96 138 handle->fd = -1;
jbe@96 139 handle->closed = 1;
jbe@104 140 #if defined(TCP_NOPUSH)
jbe@96 141 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 142 #elif defined(TCP_CORK)
jbe@95 143 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 144 #endif
jbe@95 145 }
jbe@95 146 handle->nopush = nopush;
jbe@96 147 #else
jbe@96 148 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 149 #endif
jbe@95 150 }
jbe@95 151
jbe@86 152 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 153 moonbr_io_handle_t *handle;
jbe@85 154 lua_Integer maxread;
jbe@85 155 const char *terminatorstr;
jbe@85 156 size_t terminatorlen;
jbe@137 157 char terminator = 0; /* initialize to avoid compiler warning */
jbe@85 158 luaL_Buffer luabuf;
jbe@85 159 size_t luabufcnt = 0;
jbe@105 160 int remaining;
jbe@85 161 char *terminatorpos;
jbe@103 162 ssize_t bytesread;
jbe@85 163 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 164 maxread = luaL_optinteger(L, 2, 0);
jbe@85 165 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 166 if (terminatorlen) {
jbe@85 167 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 168 terminator = terminatorstr[0];
jbe@85 169 }
jbe@86 170 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 171 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 172 if (handle->readerr) {
jbe@85 173 lua_pushnil(L);
jbe@85 174 lua_pushliteral(L, "Previous read error");
jbe@85 175 return 2;
jbe@85 176 }
jbe@143 177 if (handle->fd < 0) {
jbe@143 178 /* fake EOF to simulate shutdown */
jbe@143 179 if (!drain) lua_pushliteral(L, "");
jbe@143 180 else lua_pushinteger(L, 0);
jbe@143 181 lua_pushliteral(L, "eof");
jbe@143 182 return 2;
jbe@143 183 }
jbe@105 184 handle->readerr = 1;
jbe@85 185 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 186 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 187 while (1) {
jbe@105 188 remaining = -1;
jbe@142 189 terminatorpos = NULL;
jbe@105 190 if (
jbe@105 191 maxread > 0 &&
jbe@143 192 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 193 ) {
jbe@142 194 remaining = (size_t)maxread - luabufcnt;
jbe@142 195 terminatorpos = memchr(
jbe@142 196 handle->readbuf + handle->readbufout,
jbe@142 197 terminator,
jbe@142 198 remaining
jbe@142 199 );
jbe@85 200 } else if (terminatorlen) {
jbe@105 201 terminatorpos = memchr(
jbe@105 202 handle->readbuf + handle->readbufout,
jbe@105 203 terminator,
jbe@105 204 handle->readbufin - handle->readbufout
jbe@105 205 );
jbe@85 206 }
jbe@142 207 if (terminatorpos) remaining = 1 + (
jbe@142 208 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142 209 );
jbe@105 210 if (remaining >= 0) {
jbe@86 211 if (!drain) {
jbe@105 212 luaL_addlstring(
jbe@105 213 &luabuf,
jbe@105 214 handle->readbuf + handle->readbufout,
jbe@105 215 remaining
jbe@105 216 );
jbe@86 217 luaL_pushresult(&luabuf);
jbe@90 218 } else {
jbe@105 219 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 220 }
jbe@143 221 if (terminatorpos) lua_pushliteral(L, "term");
jbe@143 222 else lua_pushliteral(L, "maxlen");
jbe@105 223 handle->readbufout += remaining;
jbe@105 224 if (handle->readbufout == handle->readbufin) {
jbe@105 225 handle->readbufin = 0;
jbe@143 226 handle->readbufout = 0;
jbe@105 227 }
jbe@104 228 handle->readerr = 0;
jbe@143 229 return 2;
jbe@85 230 }
jbe@105 231 if (!drain) luaL_addlstring(
jbe@105 232 &luabuf,
jbe@105 233 handle->readbuf + handle->readbufout,
jbe@105 234 handle->readbufin - handle->readbufout
jbe@105 235 );
jbe@105 236 luabufcnt += handle->readbufin - handle->readbufout;
jbe@143 237 handle->readbufout = 0;
jbe@85 238 do {
jbe@103 239 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 240 } while (bytesread < 0 && (errno == EINTR));
jbe@105 241 if (
jbe@105 242 bytesread == 0 || (
jbe@105 243 nonblocking &&
jbe@105 244 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 245 )
jbe@105 246 ) {
jbe@105 247 handle->readbufin = 0;
jbe@143 248 if (!drain) luaL_pushresult(&luabuf);
jbe@143 249 else lua_pushinteger(L, luabufcnt);
jbe@143 250 if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143 251 else lua_pushliteral(L, "block");
jbe@105 252 handle->readerr = 0;
jbe@143 253 return 2;
jbe@105 254 }
jbe@103 255 if (bytesread < 0) {
jbe@85 256 moonbr_io_errmsg();
jbe@85 257 lua_pushnil(L);
jbe@85 258 lua_pushstring(L, errmsg);
jbe@85 259 return 2;
jbe@85 260 }
jbe@105 261 handle->readbufin = bytesread;
jbe@86 262 }
jbe@85 263 }
jbe@85 264
jbe@85 265 static int moonbr_io_read(lua_State *L) {
jbe@86 266 return moonbr_io_read_impl(L, 0, 0);
jbe@85 267 }
jbe@85 268
jbe@85 269 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 270 return moonbr_io_read_impl(L, 1, 0);
jbe@86 271 }
jbe@86 272
jbe@86 273 static int moonbr_io_drain(lua_State *L) {
jbe@86 274 return moonbr_io_read_impl(L, 0, 1);
jbe@86 275 }
jbe@86 276
jbe@86 277 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 278 return moonbr_io_read_impl(L, 1, 1);
jbe@85 279 }
jbe@85 280
jbe@140 281 #if LUA_VERSION_NUM >= 503
jbe@140 282 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 283 #else
jbe@140 284 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 285 #endif
jbe@143 286 lua_Integer remaining;
jbe@143 287 size_t len;
jbe@140 288 #if !(LUA_VERSION_NUM >= 503)
jbe@140 289 int ctx = 0;
jbe@140 290 lua_getctx(L, &ctx);
jbe@140 291 #endif
jbe@140 292 remaining = lua_tointeger(L, 3);
jbe@140 293 while (1) {
jbe@140 294 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140 295 lua_pushvalue(L, 1);
jbe@140 296 lua_pushvalue(L, 3);
jbe@140 297 lua_pushvalue(L, 4);
jbe@140 298 lua_call(L, 3, 2);
jbe@143 299 if (lua_isnil(L, -2)) return 2;
jbe@143 300 lua_insert(L, -2);
jbe@143 301 len = lua_rawlen(L, -1);
jbe@143 302 if (ctx == 0) {
jbe@143 303 lua_replace(L, 5);
jbe@143 304 ctx = 1;
jbe@143 305 } else if (ctx == 1) {
jbe@143 306 lua_pushvalue(L, 5);
jbe@143 307 lua_newtable(L);
jbe@143 308 lua_replace(L, 5);
jbe@143 309 lua_rawseti(L, 5, 2);
jbe@143 310 lua_rawseti(L, 5, 1);
jbe@143 311 ctx = 2;
jbe@140 312 } else {
jbe@143 313 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 314 }
jbe@143 315 if (remaining >= 0) {
jbe@143 316 remaining -= len;
jbe@143 317 lua_pushinteger(L, remaining);
jbe@143 318 lua_replace(L, 3);
jbe@143 319 }
jbe@143 320 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@143 321 lua_pop(L, 1);
jbe@140 322 lua_pushvalue(L, 2);
jbe@140 323 lua_pushvalue(L, 1);
jbe@140 324 lua_pushliteral(L, "r");
jbe@140 325 lua_callk(L, 2, 0, ctx, moonbr_io_read_cont);
jbe@140 326 }
jbe@140 327 if (ctx == 1) {
jbe@140 328 lua_pushvalue(L, 5);
jbe@140 329 } else {
jbe@140 330 luaL_Buffer buf;
jbe@140 331 lua_Integer i, chunkcount;
jbe@140 332 chunkcount = lua_rawlen(L, 5);
jbe@140 333 luaL_buffinit(L, &buf);
jbe@140 334 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 335 lua_rawgeti(L, 5, i);
jbe@140 336 luaL_addvalue(&buf);
jbe@140 337 }
jbe@140 338 luaL_pushresult(&buf);
jbe@140 339 }
jbe@143 340 lua_pushvalue(L, -2);
jbe@143 341 return 2;
jbe@140 342 }
jbe@140 343
jbe@140 344 static int moonbr_io_read_call(lua_State *L) {
jbe@140 345 lua_settop(L, 4);
jbe@140 346 lua_pushnil(L);
jbe@140 347 #if LUA_VERSION_NUM >= 503
jbe@140 348 return moonbr_io_read_cont(L, 0, 0);
jbe@140 349 #else
jbe@140 350 return moonbr_io_read_cont(L);
jbe@140 351 #endif
jbe@140 352 }
jbe@140 353
jbe@140 354 static int moonbr_io_read_yield(lua_State *L) {
jbe@140 355 int args;
jbe@140 356 lua_pushcfunction(L, moonbr_io_read_call);
jbe@140 357 lua_insert(L, 1);
jbe@140 358 args = lua_gettop(L);
jbe@140 359 lua_pushcfunction(L, moonbr_io_yield);
jbe@140 360 lua_insert(L, 3);
jbe@140 361 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall);
jbe@140 362 return lua_gettop(L);
jbe@140 363 }
jbe@140 364
jbe@81 365 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 366 moonbr_io_handle_t *handle;
jbe@80 367 int i, top;
jbe@80 368 const char *str;
jbe@92 369 size_t strlen;
jbe@103 370 ssize_t written;
jbe@80 371 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 372 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 373 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 374 if (handle->writeerr) {
jbe@80 375 lua_pushnil(L);
jbe@80 376 lua_pushliteral(L, "Previous write error");
jbe@80 377 return 2;
jbe@80 378 }
jbe@103 379 handle->writeerr = 1;
jbe@81 380 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 381 top = lua_gettop(L);
jbe@81 382 lua_getuservalue(L, 1);
jbe@103 383 lua_getfield(L, -1, "writequeue");
jbe@84 384 for (i=2; i<=top; i++) {
jbe@84 385 luaL_checklstring(L, i, &strlen);
jbe@84 386 lua_pushvalue(L, i);
jbe@84 387 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 388 handle->writeleft += strlen;
jbe@81 389 }
jbe@132 390 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 391 while (handle->writeqout != handle->writeqin) {
jbe@83 392 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 393 str = lua_tolstring(L, -1, &strlen);
jbe@92 394 while (handle->writeqoff < strlen) {
jbe@103 395 if (
jbe@132 396 strlen - handle->writeqoff <
jbe@103 397 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 398 ) {
jbe@103 399 memcpy(
jbe@103 400 handle->writebuf + handle->writebufin,
jbe@103 401 str + handle->writeqoff,
jbe@103 402 strlen - handle->writeqoff
jbe@103 403 );
jbe@103 404 handle->writebufin += strlen - handle->writeqoff;
jbe@80 405 break;
jbe@80 406 } else {
jbe@103 407 memcpy(
jbe@103 408 handle->writebuf + handle->writebufin,
jbe@103 409 str + handle->writeqoff,
jbe@103 410 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 411 );
jbe@103 412 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 413 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 414 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 415 written = write(
jbe@103 416 handle->fd,
jbe@103 417 handle->writebuf + handle->writebufout,
jbe@103 418 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 419 );
jbe@103 420 if (written < 0) {
jbe@81 421 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 422 goto moonbr_io_write_impl_block;
jbe@81 423 } else if (errno != EINTR) {
jbe@80 424 moonbr_io_errmsg();
jbe@80 425 lua_pushnil(L);
jbe@80 426 lua_pushstring(L, errmsg);
jbe@80 427 return 2;
jbe@80 428 }
jbe@103 429 } else {
jbe@103 430 handle->writebufout += written;
jbe@103 431 handle->writeleft -= written;
jbe@133 432 if (handle->flushedleft) {
jbe@133 433 if (written >= handle->flushedleft) {
jbe@133 434 handle->flushedleft = 0;
jbe@133 435 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 436 } else {
jbe@133 437 handle->flushedleft -= written;
jbe@133 438 }
jbe@133 439 }
jbe@80 440 }
jbe@80 441 }
jbe@103 442 handle->writebufin = 0;
jbe@103 443 handle->writebufout = 0;
jbe@80 444 }
jbe@80 445 }
jbe@81 446 handle->writeqoff = 0;
jbe@81 447 lua_pop(L, 1);
jbe@81 448 lua_pushnil(L);
jbe@83 449 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 450 }
jbe@132 451 while (handle->flushedleft) {
jbe@133 452 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 453 written = write(
jbe@132 454 handle->fd,
jbe@132 455 handle->writebuf + handle->writebufout,
jbe@132 456 handle->writebufin - handle->writebufout
jbe@132 457 );
jbe@132 458 if (written < 0) {
jbe@132 459 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 460 goto moonbr_io_write_impl_block;
jbe@132 461 } else if (errno != EINTR) {
jbe@132 462 moonbr_io_errmsg();
jbe@132 463 lua_pushnil(L);
jbe@132 464 lua_pushstring(L, errmsg);
jbe@132 465 return 2;
jbe@81 466 }
jbe@132 467 } else {
jbe@132 468 handle->writebufout += written;
jbe@132 469 handle->writeleft -= written;
jbe@133 470 if (handle->flushedleft) {
jbe@133 471 if (written >= handle->flushedleft) {
jbe@133 472 handle->flushedleft = 0;
jbe@133 473 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 474 } else {
jbe@133 475 handle->flushedleft -= written;
jbe@133 476 }
jbe@133 477 }
jbe@81 478 }
jbe@132 479 }
jbe@132 480 if (handle->writebufout == handle->writebufin) {
jbe@103 481 handle->writebufin = 0;
jbe@103 482 handle->writebufout = 0;
jbe@81 483 }
jbe@103 484 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 485 else lua_pushvalue(L, 1);
jbe@103 486 handle->writeerr = 0;
jbe@80 487 return 1;
jbe@81 488 moonbr_io_write_impl_block:
jbe@91 489 lua_pushinteger(L, handle->writeleft);
jbe@103 490 handle->writeerr = 0;
jbe@81 491 return 1;
jbe@81 492 }
jbe@81 493
jbe@81 494 static int moonbr_io_write(lua_State *L) {
jbe@81 495 return moonbr_io_write_impl(L, 0, 0);
jbe@81 496 }
jbe@81 497
jbe@81 498 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 499 return moonbr_io_write_impl(L, 1, 0);
jbe@80 500 }
jbe@80 501
jbe@80 502 static int moonbr_io_flush(lua_State *L) {
jbe@81 503 return moonbr_io_write_impl(L, 0, 1);
jbe@81 504 }
jbe@81 505
jbe@81 506 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 507 return moonbr_io_write_impl(L, 1, 1);
jbe@80 508 }
jbe@80 509
jbe@88 510 static int moonbr_io_finish(lua_State *L) {
jbe@88 511 moonbr_io_handle_t *handle;
jbe@88 512 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 513 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 514 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 515 if (handle->writeleft) {
jbe@94 516 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 517 lua_pushvalue(L, 1);
jbe@116 518 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 519 handle->finished = 1;
jbe@116 520 lua_error(L);
jbe@116 521 }
jbe@94 522 if (!lua_toboolean(L, -2)) {
jbe@94 523 handle->finished = 1;
jbe@94 524 return 2;
jbe@88 525 }
jbe@94 526 }
jbe@94 527 handle->finished = 1;
jbe@107 528 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 529 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 530 moonbr_io_errmsg();
jbe@88 531 lua_pushnil(L);
jbe@88 532 lua_pushstring(L, errmsg);
jbe@88 533 return 2;
jbe@88 534 }
jbe@94 535 } else {
jbe@94 536 if (close(handle->fd)) {
jbe@94 537 moonbr_io_errmsg();
jbe@94 538 handle->fd = -1;
jbe@94 539 lua_pushnil(L);
jbe@94 540 lua_pushstring(L, errmsg);
jbe@94 541 return 2;
jbe@94 542 }
jbe@94 543 handle->fd = -1; /* fake EOF on read */
jbe@88 544 }
jbe@88 545 lua_pushboolean(L, 1);
jbe@88 546 return 1;
jbe@88 547 }
jbe@88 548
jbe@94 549 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 550 moonbr_io_handle_t *handle;
jbe@83 551 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 552 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 553 if (!reset) {
jbe@87 554 if (handle->writeleft) {
jbe@87 555 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 556 lua_pushvalue(L, 1);
jbe@116 557 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 558 handle->closed = 1;
jbe@116 559 close(handle->fd);
jbe@116 560 handle->fd = -1;
jbe@116 561 lua_error(L);
jbe@116 562 }
jbe@129 563 handle->closed = 1;
jbe@87 564 if (!lua_toboolean(L, -2)) {
jbe@87 565 close(handle->fd);
jbe@87 566 handle->fd = -1;
jbe@87 567 return 2;
jbe@87 568 }
jbe@129 569 } else {
jbe@129 570 handle->closed = 1;
jbe@129 571 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 572 }
jbe@129 573 } else {
jbe@129 574 handle->closed = 1;
jbe@83 575 }
jbe@94 576 if (handle->fd >= 0) {
jbe@94 577 if (close(handle->fd)) {
jbe@94 578 moonbr_io_errmsg();
jbe@94 579 handle->fd = -1;
jbe@94 580 lua_pushnil(L);
jbe@94 581 lua_pushstring(L, errmsg);
jbe@94 582 return 2;
jbe@94 583 }
jbe@104 584 handle->fd = -1;
jbe@83 585 }
jbe@83 586 lua_pushboolean(L, 1);
jbe@83 587 return 1;
jbe@84 588
jbe@83 589 }
jbe@83 590
jbe@94 591 static int moonbr_io_close(lua_State *L) {
jbe@94 592 return moonbr_io_close_impl(L, 0);
jbe@94 593 }
jbe@94 594
jbe@84 595 static int moonbr_io_reset(lua_State *L) {
jbe@94 596 return moonbr_io_close_impl(L, 1);
jbe@84 597 }
jbe@84 598
jbe@108 599 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 600 moonbr_io_handle_t *handle;
jbe@88 601 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 602 if (handle->fd >= 0) {
jbe@88 603 lua_pushcfunction(L, moonbr_io_close);
jbe@88 604 lua_pushvalue(L, 1);
jbe@88 605 lua_pushinteger(L, 0);
jbe@88 606 lua_call(L, 2, 0);
jbe@88 607 }
jbe@88 608 return 0;
jbe@88 609 }
jbe@88 610
jbe@100 611 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 612 moonbr_io_handle_t *handle;
jbe@88 613 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 614 if (!handle->closed) {
jbe@100 615 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 616 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 617 lua_call(L, 1, 0);
jbe@88 618 }
jbe@88 619 }
jbe@88 620
jbe@107 621 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 622 moonbr_io_handle_t *handle;
jbe@107 623 struct sockaddr addr;
jbe@107 624 socklen_t addrlen;
jbe@79 625 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 626 handle->fd = fd;
jbe@107 627 addrlen = sizeof(addr);
jbe@107 628 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 629 if (errno != ENOTSOCK) {
jbe@107 630 moonbr_io_errmsg();
jbe@107 631 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 632 }
jbe@107 633 handle->issock = 0;
jbe@107 634 } else {
jbe@107 635 handle->issock = 1;
jbe@107 636 handle->addrfam = addr.sa_family;
jbe@107 637 }
jbe@94 638 handle->finished = 0;
jbe@94 639 handle->closed = 0;
jbe@81 640 handle->nonblocking = -1;
jbe@95 641 handle->nopush = -1;
jbe@85 642 handle->readerr = 0;
jbe@105 643 handle->readbufin = 0;
jbe@105 644 handle->readbufout = 0;
jbe@81 645 handle->writeerr = 0;
jbe@81 646 handle->writeleft = 0;
jbe@132 647 handle->flushedleft = 0;
jbe@83 648 handle->writeqin = 0;
jbe@83 649 handle->writeqout = 0;
jbe@81 650 handle->writeqoff = 0;
jbe@103 651 handle->writebufin = 0;
jbe@103 652 handle->writebufout = 0;
jbe@87 653 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 654 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 655 lua_setmetatable(L, -2);
jbe@79 656 lua_newtable(L); // uservalue
jbe@81 657 lua_newtable(L);
jbe@103 658 lua_setfield(L, -2, "writequeue");
jbe@79 659 lua_newtable(L); // public
jbe@107 660 if (handle->addrfam == AF_INET6) {
jbe@107 661 struct sockaddr_in6 addr_in6;
jbe@107 662 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 663 const char *addrstr;
jbe@107 664 addrlen = sizeof(addr_in6);
jbe@107 665 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 666 moonbr_io_errmsg();
jbe@107 667 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 668 }
jbe@107 669 if (addrlen > sizeof(addr_in6)) {
jbe@107 670 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 671 }
jbe@107 672 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 673 if (!addrstr) {
jbe@107 674 moonbr_io_errmsg();
jbe@107 675 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 676 } else {
jbe@107 677 lua_pushstring(L, addrstr);
jbe@107 678 lua_setfield(L, -2, "local_ip6");
jbe@107 679 }
jbe@107 680 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 681 lua_setfield(L, -2, "local_tcpport");
jbe@107 682 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 683 moonbr_io_errmsg();
jbe@107 684 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 685 }
jbe@107 686 if (addrlen > sizeof(addr_in6)) {
jbe@107 687 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 688 }
jbe@107 689 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 690 if (!addrstr) {
jbe@107 691 moonbr_io_errmsg();
jbe@107 692 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 693 } else {
jbe@107 694 lua_pushstring(L, addrstr);
jbe@107 695 lua_setfield(L, -2, "remote_ip6");
jbe@107 696 }
jbe@107 697 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 698 lua_setfield(L, -2, "remote_tcpport");
jbe@107 699 } else if (handle->addrfam == AF_INET) {
jbe@107 700 struct sockaddr_in addr_in;
jbe@107 701 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 702 const char *addrstr;
jbe@107 703 addrlen = sizeof(addr_in);
jbe@107 704 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 705 moonbr_io_errmsg();
jbe@107 706 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 707 }
jbe@107 708 if (addrlen > sizeof(addr_in)) {
jbe@107 709 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 710 }
jbe@107 711 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 712 if (!addrstr) {
jbe@107 713 moonbr_io_errmsg();
jbe@107 714 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 715 } else {
jbe@107 716 lua_pushstring(L, addrstr);
jbe@107 717 lua_setfield(L, -2, "local_ip4");
jbe@107 718 }
jbe@107 719 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 720 lua_setfield(L, -2, "local_tcpport");
jbe@107 721 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 722 moonbr_io_errmsg();
jbe@107 723 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 724 }
jbe@107 725 if (addrlen > sizeof(addr_in)) {
jbe@107 726 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 727 }
jbe@107 728 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 729 if (!addrstr) {
jbe@107 730 moonbr_io_errmsg();
jbe@107 731 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 732 } else {
jbe@107 733 lua_pushstring(L, addrstr);
jbe@107 734 lua_setfield(L, -2, "remote_ip4");
jbe@107 735 }
jbe@107 736 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 737 lua_setfield(L, -2, "remote_tcpport");
jbe@107 738 }
jbe@79 739 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 740 lua_setmetatable(L, -2);
jbe@79 741 lua_setfield(L, -2, "public");
jbe@79 742 lua_setuservalue(L, -2);
jbe@79 743 }
jbe@79 744
jbe@79 745 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 746 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 747 lua_getuservalue(L, 1);
jbe@79 748 lua_getfield(L, -1, "public");
jbe@79 749 lua_pushvalue(L, 2);
jbe@79 750 lua_gettable(L, -2);
jbe@79 751 return 1;
jbe@79 752 }
jbe@79 753
jbe@79 754 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 755 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 756 lua_getuservalue(L, 1);
jbe@79 757 lua_getfield(L, -1, "public");
jbe@79 758 lua_pushvalue(L, 2);
jbe@79 759 lua_pushvalue(L, 3);
jbe@79 760 lua_settable(L, -3);
jbe@79 761 return 0;
jbe@79 762 }
jbe@79 763
jbe@111 764 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 765 const char *path;
jbe@111 766 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 767 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 768 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 769 ) - 1; /* one byte for termination */
jbe@111 770 int sock;
jbe@111 771 path = luaL_checkstring(L, 1);
jbe@111 772 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 773 strcpy(sockaddr.sun_path, path);
jbe@111 774 sock = socket(
jbe@111 775 PF_LOCAL,
jbe@111 776 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 777 0
jbe@111 778 );
jbe@111 779 if (sock < 0) {
jbe@111 780 moonbr_io_errmsg();
jbe@111 781 lua_pushnil(L);
jbe@111 782 lua_pushstring(L, errmsg);
jbe@111 783 return 2;
jbe@111 784 }
jbe@111 785 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 786 if (!nonblocking && errno == EINTR) {
jbe@111 787 moonbr_io_errmsg();
jbe@111 788 close(sock);
jbe@111 789 lua_pushnil(L);
jbe@111 790 lua_pushstring(L, errmsg);
jbe@111 791 return 2;
jbe@111 792 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 793 moonbr_io_errmsg();
jbe@111 794 lua_pushnil(L);
jbe@111 795 lua_pushstring(L, errmsg);
jbe@111 796 return 2;
jbe@111 797 }
jbe@111 798 }
jbe@111 799 moonbr_io_pushhandle(L, sock);
jbe@111 800 return 1;
jbe@111 801 }
jbe@111 802
jbe@111 803 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 804 return moonbr_io_localconnect_impl(L, 0);
jbe@111 805 }
jbe@111 806
jbe@111 807 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 808 return moonbr_io_localconnect_impl(L, 1);
jbe@111 809 }
jbe@111 810
jbe@99 811 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 812 const char *host, *port;
jbe@98 813 struct addrinfo hints = { 0, };
jbe@98 814 struct addrinfo *res, *addrinfo;
jbe@98 815 int errcode;
jbe@98 816 int sock;
jbe@98 817 host = luaL_checkstring(L, 1);
jbe@98 818 port = luaL_checkstring(L, 2);
jbe@98 819 hints.ai_family = AF_UNSPEC;
jbe@98 820 hints.ai_socktype = SOCK_STREAM;
jbe@98 821 hints.ai_protocol = IPPROTO_TCP;
jbe@98 822 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 823 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 824 if (errcode) {
jbe@102 825 freeaddrinfo(res);
jbe@98 826 if (errcode == EAI_SYSTEM) {
jbe@98 827 moonbr_io_errmsg();
jbe@98 828 lua_pushnil(L);
jbe@98 829 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 830 } else {
jbe@98 831 lua_pushnil(L);
jbe@98 832 lua_pushstring(L, gai_strerror(errcode));
jbe@98 833 }
jbe@98 834 return 2;
jbe@98 835 }
jbe@98 836 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 837 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 838 }
jbe@98 839 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 840 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 841 }
jbe@98 842 addrinfo = res;
jbe@98 843 moonbr_io_tcpconnect_found:
jbe@99 844 sock = socket(
jbe@134 845 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 846 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 847 addrinfo->ai_protocol
jbe@99 848 );
jbe@98 849 if (sock < 0) {
jbe@98 850 moonbr_io_errmsg();
jbe@108 851 freeaddrinfo(res);
jbe@98 852 lua_pushnil(L);
jbe@98 853 lua_pushstring(L, errmsg);
jbe@108 854 return 2;
jbe@98 855 }
jbe@98 856 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 857 freeaddrinfo(res);
jbe@99 858 if (!nonblocking && errno == EINTR) {
jbe@99 859 moonbr_io_errmsg();
jbe@99 860 close(sock);
jbe@99 861 lua_pushnil(L);
jbe@99 862 lua_pushstring(L, errmsg);
jbe@99 863 return 2;
jbe@99 864 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 865 moonbr_io_errmsg();
jbe@99 866 lua_pushnil(L);
jbe@99 867 lua_pushstring(L, errmsg);
jbe@99 868 return 2;
jbe@99 869 }
jbe@108 870 } else {
jbe@108 871 freeaddrinfo(res);
jbe@98 872 }
jbe@107 873 moonbr_io_pushhandle(L, sock);
jbe@98 874 return 1;
jbe@98 875 }
jbe@98 876
jbe@99 877 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 878 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 879 }
jbe@99 880
jbe@99 881 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 882 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 883 }
jbe@99 884
jbe@112 885 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 886 moonbr_io_listener_t *listener;
jbe@112 887 const char *path;
jbe@118 888 struct stat sb;
jbe@112 889 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 890 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 891 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 892 ) - 1; /* one byte for termination */
jbe@112 893 int sock;
jbe@112 894 path = luaL_checkstring(L, 1);
jbe@112 895 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 896 strcpy(sockaddr.sun_path, path);
jbe@118 897 if (stat(path, &sb) == 0) {
jbe@118 898 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 899 }
jbe@112 900 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 901 listener->fd = -1;
jbe@112 902 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 903 sock = socket(
jbe@112 904 PF_LOCAL,
jbe@112 905 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 906 0
jbe@112 907 );
jbe@112 908 if (sock < 0) {
jbe@112 909 moonbr_io_errmsg();
jbe@112 910 lua_pushnil(L);
jbe@112 911 lua_pushstring(L, errmsg);
jbe@112 912 return 2;
jbe@112 913 }
jbe@112 914 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 915 moonbr_io_errmsg();
jbe@112 916 close(sock);
jbe@112 917 lua_pushnil(L);
jbe@112 918 lua_pushstring(L, errmsg);
jbe@112 919 return 2;
jbe@112 920 }
jbe@112 921 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 922 moonbr_io_errmsg();
jbe@112 923 close(sock);
jbe@112 924 lua_pushnil(L);
jbe@112 925 lua_pushstring(L, errmsg);
jbe@112 926 return 2;
jbe@112 927 }
jbe@112 928 listener->fd = sock;
jbe@118 929 listener->addrfam = AF_LOCAL;
jbe@112 930 listener->nonblocking = -1;
jbe@112 931 return 1;
jbe@112 932 }
jbe@112 933
jbe@108 934 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 935 moonbr_io_listener_t *listener;
jbe@108 936 const char *host, *port;
jbe@108 937 struct addrinfo hints = { 0, };
jbe@108 938 struct addrinfo *res, *addrinfo;
jbe@108 939 int errcode;
jbe@108 940 int sock;
jbe@108 941 host = luaL_optstring(L, 1, NULL);
jbe@108 942 port = luaL_checkstring(L, 2);
jbe@108 943 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 944 listener->fd = -1;
jbe@108 945 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 946 hints.ai_family = AF_UNSPEC;
jbe@108 947 hints.ai_socktype = SOCK_STREAM;
jbe@108 948 hints.ai_protocol = IPPROTO_TCP;
jbe@108 949 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 950 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 951 if (errcode) {
jbe@108 952 freeaddrinfo(res);
jbe@108 953 if (errcode == EAI_SYSTEM) {
jbe@108 954 moonbr_io_errmsg();
jbe@108 955 lua_pushnil(L);
jbe@108 956 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 957 } else {
jbe@108 958 lua_pushnil(L);
jbe@108 959 lua_pushstring(L, gai_strerror(errcode));
jbe@108 960 }
jbe@108 961 return 2;
jbe@108 962 }
jbe@108 963 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 964 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 965 }
jbe@108 966 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 967 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 968 }
jbe@108 969 addrinfo = res;
jbe@108 970 moonbr_io_tcpconnect_found:
jbe@118 971 listener->addrfam = addrinfo->ai_family;
jbe@108 972 sock = socket(
jbe@134 973 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 974 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 975 addrinfo->ai_protocol
jbe@108 976 );
jbe@108 977 if (sock < 0) {
jbe@108 978 moonbr_io_errmsg();
jbe@108 979 freeaddrinfo(res);
jbe@108 980 lua_pushnil(L);
jbe@108 981 lua_pushstring(L, errmsg);
jbe@108 982 return 2;
jbe@108 983 }
jbe@120 984 {
jbe@120 985 static const int reuseval = 1;
jbe@120 986 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 987 moonbr_io_errmsg();
jbe@120 988 freeaddrinfo(res);
jbe@120 989 close(sock);
jbe@120 990 lua_pushnil(L);
jbe@120 991 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 992 return 2;
jbe@120 993 }
jbe@120 994 }
jbe@108 995 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 996 moonbr_io_errmsg();
jbe@108 997 freeaddrinfo(res);
jbe@108 998 close(sock);
jbe@108 999 lua_pushnil(L);
jbe@108 1000 lua_pushstring(L, errmsg);
jbe@108 1001 return 2;
jbe@108 1002 }
jbe@108 1003 freeaddrinfo(res);
jbe@108 1004 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1005 moonbr_io_errmsg();
jbe@108 1006 close(sock);
jbe@108 1007 lua_pushnil(L);
jbe@108 1008 lua_pushstring(L, errmsg);
jbe@108 1009 return 2;
jbe@108 1010 }
jbe@108 1011 listener->fd = sock;
jbe@108 1012 listener->nonblocking = -1;
jbe@108 1013 return 1;
jbe@108 1014 }
jbe@108 1015
jbe@108 1016 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1017 moonbr_io_listener_t *listener;
jbe@108 1018 int fd;
jbe@108 1019 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1020 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1021 if (listener->nonblocking != nonblocking) {
jbe@108 1022 int flags;
jbe@108 1023 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1024 if (flags == -1) {
jbe@108 1025 moonbr_io_errmsg();
jbe@108 1026 close(listener->fd);
jbe@108 1027 listener->fd = -1;
jbe@108 1028 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1029 }
jbe@108 1030 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1031 else flags &= ~O_NONBLOCK;
jbe@108 1032 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1033 moonbr_io_errmsg();
jbe@108 1034 close(listener->fd);
jbe@108 1035 listener->fd = -1;
jbe@108 1036 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1037 }
jbe@108 1038 listener->nonblocking = nonblocking;
jbe@108 1039 }
jbe@108 1040 while (1) {
jbe@108 1041 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1042 if (fd < 0) {
jbe@108 1043 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1044 lua_pushboolean(L, 0);
jbe@108 1045 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1046 return 2;
jbe@108 1047 } else if (errno != EINTR) {
jbe@108 1048 moonbr_io_errmsg();
jbe@108 1049 lua_pushnil(L);
jbe@108 1050 lua_pushstring(L, errmsg);
jbe@108 1051 return 2;
jbe@108 1052 }
jbe@108 1053 } else {
jbe@108 1054 moonbr_io_pushhandle(L, fd);
jbe@108 1055 return 1;
jbe@108 1056 }
jbe@108 1057 }
jbe@108 1058 }
jbe@108 1059
jbe@108 1060 static int moonbr_io_accept(lua_State *L) {
jbe@108 1061 return moonbr_io_accept_impl(L, 0);
jbe@108 1062 }
jbe@108 1063
jbe@108 1064 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1065 return moonbr_io_accept_impl(L, 1);
jbe@108 1066 }
jbe@108 1067
jbe@108 1068 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1069 moonbr_io_listener_t *listener;
jbe@118 1070 struct sockaddr_un addr;
jbe@118 1071 socklen_t addrlen;
jbe@118 1072 struct stat sb;
jbe@108 1073 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1074 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1075 addrlen = sizeof(addr);
jbe@118 1076 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1077 if (close(listener->fd)) {
jbe@108 1078 moonbr_io_errmsg();
jbe@108 1079 listener->fd = -1;
jbe@118 1080 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1081 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1082 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1083 }
jbe@118 1084 }
jbe@108 1085 lua_pushnil(L);
jbe@108 1086 lua_pushstring(L, errmsg);
jbe@108 1087 return 2;
jbe@108 1088 }
jbe@108 1089 listener->fd = -1;
jbe@118 1090 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1091 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1092 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1093 }
jbe@118 1094 }
jbe@108 1095 lua_pushboolean(L, 1);
jbe@108 1096 return 1;
jbe@108 1097 }
jbe@108 1098
jbe@108 1099 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1100 moonbr_io_listener_t *listener;
jbe@108 1101 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1102 if (listener->fd >= 0) close(listener->fd);
jbe@108 1103 listener->fd = -1;
jbe@108 1104 return 0;
jbe@108 1105 }
jbe@108 1106
jbe@106 1107 static int moonbr_io_poll(lua_State *L) {
jbe@106 1108 moonbr_io_handle_t *handle;
jbe@108 1109 moonbr_io_listener_t *listener;
jbe@106 1110 int fd, isnum;
jbe@106 1111 int nfds = 0;
jbe@106 1112 fd_set readfds, writefds, exceptfds;
jbe@106 1113 struct timeval timeout = {0, };
jbe@106 1114 int status;
jbe@106 1115 FD_ZERO(&readfds);
jbe@106 1116 FD_ZERO(&writefds);
jbe@106 1117 FD_ZERO(&exceptfds);
jbe@106 1118 if (!lua_isnoneornil(L, 1)) {
jbe@106 1119 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1120 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1121 if (lua_toboolean(L, -1)) {
jbe@106 1122 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1123 if (handle) {
jbe@109 1124 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1125 fd = handle->fd;
jbe@122 1126 if (
jbe@122 1127 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1128 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1129 ) {
jbe@109 1130 lua_pushboolean(L, 1);
jbe@109 1131 return 1;
jbe@109 1132 }
jbe@106 1133 } else {
jbe@108 1134 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1135 if (listener) {
jbe@108 1136 fd = listener->fd;
jbe@108 1137 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1138 } else {
jbe@108 1139 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1140 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1141 }
jbe@106 1142 }
jbe@138 1143 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1144 FD_SET(fd, &readfds);
jbe@106 1145 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1146 }
jbe@106 1147 }
jbe@106 1148 }
jbe@106 1149 if (!lua_isnoneornil(L, 2)) {
jbe@106 1150 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1151 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1152 if (lua_toboolean(L, -1)) {
jbe@106 1153 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1154 if (handle) {
jbe@109 1155 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1156 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1157 fd = handle->fd;
jbe@106 1158 } else {
jbe@108 1159 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1160 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1161 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1162 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1163 }
jbe@138 1164 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1165 FD_SET(fd, &writefds);
jbe@106 1166 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1167 }
jbe@106 1168 }
jbe@106 1169 }
jbe@106 1170 if (!lua_isnoneornil(L, 3)) {
jbe@106 1171 lua_Number n;
jbe@106 1172 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1173 if (isnum && n>=0 && n<100000000) {
jbe@106 1174 timeout.tv_sec = n;
jbe@106 1175 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1176 } else {
jbe@106 1177 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1178 }
jbe@106 1179 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1180 } else {
jbe@106 1181 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1182 }
jbe@106 1183 if (status == -1) {
jbe@106 1184 if (errno == EINTR) {
jbe@106 1185 lua_pushboolean(L, 0);
jbe@106 1186 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1187 return 2;
jbe@106 1188 } else {
jbe@106 1189 moonbr_io_errmsg();
jbe@106 1190 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1191 }
jbe@106 1192 } else if (status == 0) {
jbe@106 1193 lua_pushboolean(L, 0);
jbe@106 1194 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1195 return 2;
jbe@106 1196 } else {
jbe@106 1197 lua_pushboolean(L, 1);
jbe@106 1198 return 1;
jbe@106 1199 }
jbe@106 1200 }
jbe@106 1201
jbe@115 1202 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1203 lua_Number sub;
jbe@115 1204 struct timespec tp;
jbe@115 1205 sub = luaL_optnumber(L, 1, 0);
jbe@115 1206 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1207 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1208 }
jbe@115 1209 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1210 return 1;
jbe@115 1211 }
jbe@115 1212
jbe@79 1213 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1214 {"read", moonbr_io_read},
jbe@85 1215 {"read_nb", moonbr_io_read_nb},
jbe@140 1216 {"read_call", moonbr_io_read_call},
jbe@140 1217 {"read_yield", moonbr_io_read_yield},
jbe@86 1218 {"drain", moonbr_io_drain},
jbe@86 1219 {"drain_nb", moonbr_io_drain_nb},
jbe@80 1220 {"write", moonbr_io_write},
jbe@81 1221 {"write_nb", moonbr_io_write_nb},
jbe@80 1222 {"flush", moonbr_io_flush},
jbe@81 1223 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1224 {"finish", moonbr_io_finish},
jbe@87 1225 {"close", moonbr_io_close},
jbe@85 1226 {"reset", moonbr_io_reset},
jbe@79 1227 {NULL, NULL}
jbe@79 1228 };
jbe@79 1229
jbe@79 1230 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1231 {"__index", moonbr_io_handleindex},
jbe@79 1232 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1233 {"__gc", moonbr_io_handlegc},
jbe@108 1234 {NULL, NULL}
jbe@108 1235 };
jbe@108 1236
jbe@108 1237 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1238 {"accept", moonbr_io_accept},
jbe@108 1239 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1240 {"close", moonbr_io_unlisten},
jbe@108 1241 {NULL, NULL}
jbe@108 1242 };
jbe@108 1243
jbe@108 1244 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1245 {"__gc", moonbr_io_listenergc},
jbe@79 1246 {NULL, NULL}
jbe@79 1247 };
jbe@79 1248
jbe@79 1249 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1250 {"localconnect", moonbr_io_localconnect},
jbe@111 1251 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1252 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1253 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1254 {"locallisten", moonbr_io_locallisten},
jbe@108 1255 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1256 {"poll", moonbr_io_poll},
jbe@115 1257 {"timeref", moonbr_io_timeref},
jbe@79 1258 {NULL, NULL}
jbe@79 1259 };
jbe@79 1260
jbe@79 1261 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1262
jbe@113 1263 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1264
jbe@80 1265 lua_newtable(L); // module
jbe@80 1266
jbe@79 1267 lua_newtable(L); // public metatable
jbe@79 1268 lua_newtable(L); // handle methods
jbe@79 1269 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1270 lua_pushvalue(L, -1);
jbe@108 1271 lua_setfield(L, -4, "prototype_handle");
jbe@79 1272 lua_setfield(L, -2, "__index");
jbe@79 1273 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1274
jbe@79 1275 lua_newtable(L); // handle metatable
jbe@79 1276 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1277 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1278
jbe@108 1279 lua_newtable(L); // listener metatable
jbe@108 1280 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1281 lua_newtable(L); // listener methods
jbe@108 1282 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1283 lua_pushvalue(L, -1);
jbe@108 1284 lua_setfield(L, -4, "prototype_listener");
jbe@108 1285 lua_setfield(L, -2, "__index");
jbe@108 1286 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1287
jbe@79 1288 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1289 return 1;
jbe@79 1290
jbe@79 1291 }
jbe@79 1292

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