moonbridge

annotate moonbridge_io.c @ 142:8cd9acda3853

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Bugfix regarding detection of read end in "read" method
author jbe
date Fri May 01 13:56:52 2015 +0200 (2015-05-01)
parents 845e3dce3774
children 41da87a681d6
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@105 177 handle->readerr = 1;
jbe@104 178 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@85 179 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 180 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 181 while (1) {
jbe@105 182 remaining = -1;
jbe@142 183 terminatorpos = NULL;
jbe@105 184 if (
jbe@105 185 maxread > 0 &&
jbe@142 186 (size_t)maxread - luabufcnt <= handle->readbufin - handle->readbufout
jbe@105 187 ) {
jbe@142 188 remaining = (size_t)maxread - luabufcnt;
jbe@142 189 terminatorpos = memchr(
jbe@142 190 handle->readbuf + handle->readbufout,
jbe@142 191 terminator,
jbe@142 192 remaining
jbe@142 193 );
jbe@85 194 } else if (terminatorlen) {
jbe@105 195 terminatorpos = memchr(
jbe@105 196 handle->readbuf + handle->readbufout,
jbe@105 197 terminator,
jbe@105 198 handle->readbufin - handle->readbufout
jbe@105 199 );
jbe@85 200 }
jbe@142 201 if (terminatorpos) remaining = 1 + (
jbe@142 202 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142 203 );
jbe@105 204 if (remaining >= 0) {
jbe@86 205 if (!drain) {
jbe@105 206 luaL_addlstring(
jbe@105 207 &luabuf,
jbe@105 208 handle->readbuf + handle->readbufout,
jbe@105 209 remaining
jbe@105 210 );
jbe@86 211 luaL_pushresult(&luabuf);
jbe@90 212 } else {
jbe@105 213 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 214 }
jbe@105 215 handle->readbufout += remaining;
jbe@105 216 if (handle->readbufout == handle->readbufin) {
jbe@105 217 handle->readbufin = 0;
jbe@105 218 handle->readbufout =0;
jbe@105 219 }
jbe@104 220 handle->readerr = 0;
jbe@85 221 return 1;
jbe@85 222 }
jbe@105 223 if (!drain) luaL_addlstring(
jbe@105 224 &luabuf,
jbe@105 225 handle->readbuf + handle->readbufout,
jbe@105 226 handle->readbufin - handle->readbufout
jbe@105 227 );
jbe@105 228 luabufcnt += handle->readbufin - handle->readbufout;
jbe@85 229 do {
jbe@103 230 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 231 } while (bytesread < 0 && (errno == EINTR));
jbe@105 232 if (
jbe@105 233 bytesread == 0 || (
jbe@105 234 nonblocking &&
jbe@105 235 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 236 )
jbe@105 237 ) {
jbe@105 238 handle->readbufin = 0;
jbe@105 239 handle->readbufout = 0;
jbe@105 240 if (!drain) {
jbe@105 241 luaL_pushresult(&luabuf);
jbe@105 242 if (!luabufcnt && bytesread == 0) {
jbe@105 243 lua_pop(L, 1);
jbe@105 244 moonbr_io_read_impl_eof:
jbe@105 245 lua_pushboolean(L, 0);
jbe@105 246 lua_pushliteral(L, "End of file");
jbe@105 247 handle->readerr = 0;
jbe@105 248 return 2;
jbe@105 249 }
jbe@105 250 } else {
jbe@105 251 if (!luabufcnt && bytesread == 0) lua_pushboolean(L, 1);
jbe@105 252 else lua_pushboolean(L, luabufcnt);
jbe@105 253 }
jbe@105 254 handle->readerr = 0;
jbe@105 255 return 1;
jbe@105 256 }
jbe@103 257 if (bytesread < 0) {
jbe@85 258 moonbr_io_errmsg();
jbe@85 259 lua_pushnil(L);
jbe@85 260 lua_pushstring(L, errmsg);
jbe@85 261 return 2;
jbe@85 262 }
jbe@105 263 handle->readbufin = bytesread;
jbe@105 264 handle->readbufout = 0;
jbe@86 265 }
jbe@85 266 }
jbe@85 267
jbe@85 268 static int moonbr_io_read(lua_State *L) {
jbe@86 269 return moonbr_io_read_impl(L, 0, 0);
jbe@85 270 }
jbe@85 271
jbe@85 272 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 273 return moonbr_io_read_impl(L, 1, 0);
jbe@86 274 }
jbe@86 275
jbe@86 276 static int moonbr_io_drain(lua_State *L) {
jbe@86 277 return moonbr_io_read_impl(L, 0, 1);
jbe@86 278 }
jbe@86 279
jbe@86 280 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 281 return moonbr_io_read_impl(L, 1, 1);
jbe@85 282 }
jbe@85 283
jbe@140 284 #if LUA_VERSION_NUM >= 503
jbe@140 285 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 286 #else
jbe@140 287 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 288 #endif
jbe@140 289 size_t len, remaining;
jbe@140 290 const char *terminatorstr = NULL;
jbe@140 291 size_t terminatorlen = 0;
jbe@140 292 const char *chunk;
jbe@140 293 size_t chunklen;
jbe@140 294 #if !(LUA_VERSION_NUM >= 503)
jbe@140 295 int ctx = 0;
jbe@140 296 lua_getctx(L, &ctx);
jbe@140 297 #endif
jbe@140 298 remaining = lua_tointeger(L, 3);
jbe@140 299 while (1) {
jbe@140 300 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140 301 lua_pushvalue(L, 1);
jbe@140 302 lua_pushvalue(L, 3);
jbe@140 303 lua_pushvalue(L, 4);
jbe@140 304 lua_call(L, 3, 2);
jbe@140 305 if (lua_isnil(L, -2)) {
jbe@140 306 return 2;
jbe@140 307 } else if (!lua_toboolean(L, -2)) {
jbe@140 308 if (ctx) {
jbe@140 309 lua_pushnil(L);
jbe@140 310 lua_pushliteral(L, "Unexpected EOF");
jbe@140 311 }
jbe@140 312 return 2;
jbe@140 313 }
jbe@140 314 len = lua_rawlen(L, -2);
jbe@140 315 if (!len) {
jbe@140 316 lua_pop(L, 2);
jbe@140 317 } else {
jbe@140 318 lua_pop(L, 1);
jbe@140 319 if (!terminatorstr) {
jbe@140 320 terminatorstr = lua_tolstring(L, 4, &terminatorlen);
jbe@140 321 if (!terminatorstr) terminatorstr = "";
jbe@140 322 }
jbe@140 323 if (terminatorlen) chunk = lua_tolstring(L, -1, &chunklen);
jbe@140 324 if (ctx == 0) {
jbe@140 325 lua_replace(L, 5);
jbe@140 326 ctx = 1;
jbe@140 327 } else if (ctx == 1) {
jbe@140 328 lua_pushvalue(L, 5);
jbe@140 329 lua_newtable(L);
jbe@140 330 lua_replace(L, 5);
jbe@140 331 lua_rawseti(L, 5, 2);
jbe@140 332 lua_rawseti(L, 5, 1);
jbe@140 333 ctx = 2;
jbe@140 334 } else {
jbe@140 335 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 336 }
jbe@140 337 if (remaining) {
jbe@140 338 if (len >= remaining) break;
jbe@140 339 remaining -= len;
jbe@140 340 lua_pushinteger(L, remaining);
jbe@140 341 lua_replace(L, 3);
jbe@140 342 }
jbe@140 343 if (terminatorlen && chunk[chunklen-1] == terminatorstr[0]) break;
jbe@140 344 }
jbe@140 345 lua_pushvalue(L, 2);
jbe@140 346 lua_pushvalue(L, 1);
jbe@140 347 lua_pushliteral(L, "r");
jbe@140 348 lua_callk(L, 2, 0, ctx, moonbr_io_read_cont);
jbe@140 349 }
jbe@140 350 if (ctx == 1) {
jbe@140 351 lua_pushvalue(L, 5);
jbe@140 352 } else {
jbe@140 353 luaL_Buffer buf;
jbe@140 354 lua_Integer i, chunkcount;
jbe@140 355 chunkcount = lua_rawlen(L, 5);
jbe@140 356 luaL_buffinit(L, &buf);
jbe@140 357 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 358 lua_rawgeti(L, 5, i);
jbe@140 359 luaL_addvalue(&buf);
jbe@140 360 }
jbe@140 361 luaL_pushresult(&buf);
jbe@140 362 }
jbe@140 363 return 1;
jbe@140 364 }
jbe@140 365
jbe@140 366 static int moonbr_io_read_call(lua_State *L) {
jbe@140 367 lua_settop(L, 4);
jbe@140 368 lua_pushnil(L);
jbe@140 369 #if LUA_VERSION_NUM >= 503
jbe@140 370 return moonbr_io_read_cont(L, 0, 0);
jbe@140 371 #else
jbe@140 372 return moonbr_io_read_cont(L);
jbe@140 373 #endif
jbe@140 374 }
jbe@140 375
jbe@140 376 static int moonbr_io_read_yield(lua_State *L) {
jbe@140 377 int args;
jbe@140 378 lua_pushcfunction(L, moonbr_io_read_call);
jbe@140 379 lua_insert(L, 1);
jbe@140 380 args = lua_gettop(L);
jbe@140 381 lua_pushcfunction(L, moonbr_io_yield);
jbe@140 382 lua_insert(L, 3);
jbe@140 383 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall);
jbe@140 384 return lua_gettop(L);
jbe@140 385 }
jbe@140 386
jbe@81 387 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 388 moonbr_io_handle_t *handle;
jbe@80 389 int i, top;
jbe@80 390 const char *str;
jbe@92 391 size_t strlen;
jbe@103 392 ssize_t written;
jbe@80 393 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 394 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 395 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 396 if (handle->writeerr) {
jbe@80 397 lua_pushnil(L);
jbe@80 398 lua_pushliteral(L, "Previous write error");
jbe@80 399 return 2;
jbe@80 400 }
jbe@103 401 handle->writeerr = 1;
jbe@81 402 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 403 top = lua_gettop(L);
jbe@81 404 lua_getuservalue(L, 1);
jbe@103 405 lua_getfield(L, -1, "writequeue");
jbe@84 406 for (i=2; i<=top; i++) {
jbe@84 407 luaL_checklstring(L, i, &strlen);
jbe@84 408 lua_pushvalue(L, i);
jbe@84 409 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 410 handle->writeleft += strlen;
jbe@81 411 }
jbe@132 412 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 413 while (handle->writeqout != handle->writeqin) {
jbe@83 414 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 415 str = lua_tolstring(L, -1, &strlen);
jbe@92 416 while (handle->writeqoff < strlen) {
jbe@103 417 if (
jbe@132 418 strlen - handle->writeqoff <
jbe@103 419 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 420 ) {
jbe@103 421 memcpy(
jbe@103 422 handle->writebuf + handle->writebufin,
jbe@103 423 str + handle->writeqoff,
jbe@103 424 strlen - handle->writeqoff
jbe@103 425 );
jbe@103 426 handle->writebufin += strlen - handle->writeqoff;
jbe@80 427 break;
jbe@80 428 } else {
jbe@103 429 memcpy(
jbe@103 430 handle->writebuf + handle->writebufin,
jbe@103 431 str + handle->writeqoff,
jbe@103 432 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 433 );
jbe@103 434 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 435 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 436 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 437 written = write(
jbe@103 438 handle->fd,
jbe@103 439 handle->writebuf + handle->writebufout,
jbe@103 440 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 441 );
jbe@103 442 if (written < 0) {
jbe@81 443 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 444 goto moonbr_io_write_impl_block;
jbe@81 445 } else if (errno != EINTR) {
jbe@80 446 moonbr_io_errmsg();
jbe@80 447 lua_pushnil(L);
jbe@80 448 lua_pushstring(L, errmsg);
jbe@80 449 return 2;
jbe@80 450 }
jbe@103 451 } else {
jbe@103 452 handle->writebufout += written;
jbe@103 453 handle->writeleft -= written;
jbe@133 454 if (handle->flushedleft) {
jbe@133 455 if (written >= handle->flushedleft) {
jbe@133 456 handle->flushedleft = 0;
jbe@133 457 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 458 } else {
jbe@133 459 handle->flushedleft -= written;
jbe@133 460 }
jbe@133 461 }
jbe@80 462 }
jbe@80 463 }
jbe@103 464 handle->writebufin = 0;
jbe@103 465 handle->writebufout = 0;
jbe@80 466 }
jbe@80 467 }
jbe@81 468 handle->writeqoff = 0;
jbe@81 469 lua_pop(L, 1);
jbe@81 470 lua_pushnil(L);
jbe@83 471 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 472 }
jbe@132 473 while (handle->flushedleft) {
jbe@133 474 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 475 written = write(
jbe@132 476 handle->fd,
jbe@132 477 handle->writebuf + handle->writebufout,
jbe@132 478 handle->writebufin - handle->writebufout
jbe@132 479 );
jbe@132 480 if (written < 0) {
jbe@132 481 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 482 goto moonbr_io_write_impl_block;
jbe@132 483 } else if (errno != EINTR) {
jbe@132 484 moonbr_io_errmsg();
jbe@132 485 lua_pushnil(L);
jbe@132 486 lua_pushstring(L, errmsg);
jbe@132 487 return 2;
jbe@81 488 }
jbe@132 489 } else {
jbe@132 490 handle->writebufout += written;
jbe@132 491 handle->writeleft -= written;
jbe@133 492 if (handle->flushedleft) {
jbe@133 493 if (written >= handle->flushedleft) {
jbe@133 494 handle->flushedleft = 0;
jbe@133 495 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 496 } else {
jbe@133 497 handle->flushedleft -= written;
jbe@133 498 }
jbe@133 499 }
jbe@81 500 }
jbe@132 501 }
jbe@132 502 if (handle->writebufout == handle->writebufin) {
jbe@103 503 handle->writebufin = 0;
jbe@103 504 handle->writebufout = 0;
jbe@81 505 }
jbe@103 506 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 507 else lua_pushvalue(L, 1);
jbe@103 508 handle->writeerr = 0;
jbe@80 509 return 1;
jbe@81 510 moonbr_io_write_impl_block:
jbe@91 511 lua_pushinteger(L, handle->writeleft);
jbe@103 512 handle->writeerr = 0;
jbe@81 513 return 1;
jbe@81 514 }
jbe@81 515
jbe@81 516 static int moonbr_io_write(lua_State *L) {
jbe@81 517 return moonbr_io_write_impl(L, 0, 0);
jbe@81 518 }
jbe@81 519
jbe@81 520 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 521 return moonbr_io_write_impl(L, 1, 0);
jbe@80 522 }
jbe@80 523
jbe@80 524 static int moonbr_io_flush(lua_State *L) {
jbe@81 525 return moonbr_io_write_impl(L, 0, 1);
jbe@81 526 }
jbe@81 527
jbe@81 528 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 529 return moonbr_io_write_impl(L, 1, 1);
jbe@80 530 }
jbe@80 531
jbe@88 532 static int moonbr_io_finish(lua_State *L) {
jbe@88 533 moonbr_io_handle_t *handle;
jbe@88 534 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 535 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 536 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 537 if (handle->writeleft) {
jbe@94 538 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 539 lua_pushvalue(L, 1);
jbe@116 540 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 541 handle->finished = 1;
jbe@116 542 lua_error(L);
jbe@116 543 }
jbe@94 544 if (!lua_toboolean(L, -2)) {
jbe@94 545 handle->finished = 1;
jbe@94 546 return 2;
jbe@88 547 }
jbe@94 548 }
jbe@94 549 handle->finished = 1;
jbe@107 550 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 551 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 552 moonbr_io_errmsg();
jbe@88 553 lua_pushnil(L);
jbe@88 554 lua_pushstring(L, errmsg);
jbe@88 555 return 2;
jbe@88 556 }
jbe@94 557 } else {
jbe@94 558 if (close(handle->fd)) {
jbe@94 559 moonbr_io_errmsg();
jbe@94 560 handle->fd = -1;
jbe@94 561 lua_pushnil(L);
jbe@94 562 lua_pushstring(L, errmsg);
jbe@94 563 return 2;
jbe@94 564 }
jbe@94 565 handle->fd = -1; /* fake EOF on read */
jbe@88 566 }
jbe@88 567 lua_pushboolean(L, 1);
jbe@88 568 return 1;
jbe@88 569 }
jbe@88 570
jbe@94 571 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 572 moonbr_io_handle_t *handle;
jbe@83 573 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 574 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 575 if (!reset) {
jbe@87 576 if (handle->writeleft) {
jbe@87 577 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 578 lua_pushvalue(L, 1);
jbe@116 579 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 580 handle->closed = 1;
jbe@116 581 close(handle->fd);
jbe@116 582 handle->fd = -1;
jbe@116 583 lua_error(L);
jbe@116 584 }
jbe@129 585 handle->closed = 1;
jbe@87 586 if (!lua_toboolean(L, -2)) {
jbe@87 587 close(handle->fd);
jbe@87 588 handle->fd = -1;
jbe@87 589 return 2;
jbe@87 590 }
jbe@129 591 } else {
jbe@129 592 handle->closed = 1;
jbe@129 593 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 594 }
jbe@129 595 } else {
jbe@129 596 handle->closed = 1;
jbe@83 597 }
jbe@94 598 if (handle->fd >= 0) {
jbe@94 599 if (close(handle->fd)) {
jbe@94 600 moonbr_io_errmsg();
jbe@94 601 handle->fd = -1;
jbe@94 602 lua_pushnil(L);
jbe@94 603 lua_pushstring(L, errmsg);
jbe@94 604 return 2;
jbe@94 605 }
jbe@104 606 handle->fd = -1;
jbe@83 607 }
jbe@83 608 lua_pushboolean(L, 1);
jbe@83 609 return 1;
jbe@84 610
jbe@83 611 }
jbe@83 612
jbe@94 613 static int moonbr_io_close(lua_State *L) {
jbe@94 614 return moonbr_io_close_impl(L, 0);
jbe@94 615 }
jbe@94 616
jbe@84 617 static int moonbr_io_reset(lua_State *L) {
jbe@94 618 return moonbr_io_close_impl(L, 1);
jbe@84 619 }
jbe@84 620
jbe@108 621 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 622 moonbr_io_handle_t *handle;
jbe@88 623 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 624 if (handle->fd >= 0) {
jbe@88 625 lua_pushcfunction(L, moonbr_io_close);
jbe@88 626 lua_pushvalue(L, 1);
jbe@88 627 lua_pushinteger(L, 0);
jbe@88 628 lua_call(L, 2, 0);
jbe@88 629 }
jbe@88 630 return 0;
jbe@88 631 }
jbe@88 632
jbe@100 633 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 634 moonbr_io_handle_t *handle;
jbe@88 635 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 636 if (!handle->closed) {
jbe@100 637 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 638 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 639 lua_call(L, 1, 0);
jbe@88 640 }
jbe@88 641 }
jbe@88 642
jbe@107 643 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 644 moonbr_io_handle_t *handle;
jbe@107 645 struct sockaddr addr;
jbe@107 646 socklen_t addrlen;
jbe@79 647 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 648 handle->fd = fd;
jbe@107 649 addrlen = sizeof(addr);
jbe@107 650 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 651 if (errno != ENOTSOCK) {
jbe@107 652 moonbr_io_errmsg();
jbe@107 653 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 654 }
jbe@107 655 handle->issock = 0;
jbe@107 656 } else {
jbe@107 657 handle->issock = 1;
jbe@107 658 handle->addrfam = addr.sa_family;
jbe@107 659 }
jbe@94 660 handle->finished = 0;
jbe@94 661 handle->closed = 0;
jbe@81 662 handle->nonblocking = -1;
jbe@95 663 handle->nopush = -1;
jbe@85 664 handle->readerr = 0;
jbe@105 665 handle->readbufin = 0;
jbe@105 666 handle->readbufout = 0;
jbe@81 667 handle->writeerr = 0;
jbe@81 668 handle->writeleft = 0;
jbe@132 669 handle->flushedleft = 0;
jbe@83 670 handle->writeqin = 0;
jbe@83 671 handle->writeqout = 0;
jbe@81 672 handle->writeqoff = 0;
jbe@103 673 handle->writebufin = 0;
jbe@103 674 handle->writebufout = 0;
jbe@87 675 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 676 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 677 lua_setmetatable(L, -2);
jbe@79 678 lua_newtable(L); // uservalue
jbe@81 679 lua_newtable(L);
jbe@103 680 lua_setfield(L, -2, "writequeue");
jbe@79 681 lua_newtable(L); // public
jbe@107 682 if (handle->addrfam == AF_INET6) {
jbe@107 683 struct sockaddr_in6 addr_in6;
jbe@107 684 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 685 const char *addrstr;
jbe@107 686 addrlen = sizeof(addr_in6);
jbe@107 687 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 688 moonbr_io_errmsg();
jbe@107 689 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 690 }
jbe@107 691 if (addrlen > sizeof(addr_in6)) {
jbe@107 692 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 693 }
jbe@107 694 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 695 if (!addrstr) {
jbe@107 696 moonbr_io_errmsg();
jbe@107 697 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 698 } else {
jbe@107 699 lua_pushstring(L, addrstr);
jbe@107 700 lua_setfield(L, -2, "local_ip6");
jbe@107 701 }
jbe@107 702 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 703 lua_setfield(L, -2, "local_tcpport");
jbe@107 704 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 705 moonbr_io_errmsg();
jbe@107 706 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 707 }
jbe@107 708 if (addrlen > sizeof(addr_in6)) {
jbe@107 709 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 710 }
jbe@107 711 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 712 if (!addrstr) {
jbe@107 713 moonbr_io_errmsg();
jbe@107 714 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 715 } else {
jbe@107 716 lua_pushstring(L, addrstr);
jbe@107 717 lua_setfield(L, -2, "remote_ip6");
jbe@107 718 }
jbe@107 719 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 720 lua_setfield(L, -2, "remote_tcpport");
jbe@107 721 } else if (handle->addrfam == AF_INET) {
jbe@107 722 struct sockaddr_in addr_in;
jbe@107 723 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 724 const char *addrstr;
jbe@107 725 addrlen = sizeof(addr_in);
jbe@107 726 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 727 moonbr_io_errmsg();
jbe@107 728 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 729 }
jbe@107 730 if (addrlen > sizeof(addr_in)) {
jbe@107 731 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 732 }
jbe@107 733 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 734 if (!addrstr) {
jbe@107 735 moonbr_io_errmsg();
jbe@107 736 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 737 } else {
jbe@107 738 lua_pushstring(L, addrstr);
jbe@107 739 lua_setfield(L, -2, "local_ip4");
jbe@107 740 }
jbe@107 741 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 742 lua_setfield(L, -2, "local_tcpport");
jbe@107 743 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 744 moonbr_io_errmsg();
jbe@107 745 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 746 }
jbe@107 747 if (addrlen > sizeof(addr_in)) {
jbe@107 748 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 749 }
jbe@107 750 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 751 if (!addrstr) {
jbe@107 752 moonbr_io_errmsg();
jbe@107 753 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 754 } else {
jbe@107 755 lua_pushstring(L, addrstr);
jbe@107 756 lua_setfield(L, -2, "remote_ip4");
jbe@107 757 }
jbe@107 758 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 759 lua_setfield(L, -2, "remote_tcpport");
jbe@107 760 }
jbe@79 761 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 762 lua_setmetatable(L, -2);
jbe@79 763 lua_setfield(L, -2, "public");
jbe@79 764 lua_setuservalue(L, -2);
jbe@79 765 }
jbe@79 766
jbe@79 767 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 768 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 769 lua_getuservalue(L, 1);
jbe@79 770 lua_getfield(L, -1, "public");
jbe@79 771 lua_pushvalue(L, 2);
jbe@79 772 lua_gettable(L, -2);
jbe@79 773 return 1;
jbe@79 774 }
jbe@79 775
jbe@79 776 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 777 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 778 lua_getuservalue(L, 1);
jbe@79 779 lua_getfield(L, -1, "public");
jbe@79 780 lua_pushvalue(L, 2);
jbe@79 781 lua_pushvalue(L, 3);
jbe@79 782 lua_settable(L, -3);
jbe@79 783 return 0;
jbe@79 784 }
jbe@79 785
jbe@111 786 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 787 const char *path;
jbe@111 788 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 789 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 790 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 791 ) - 1; /* one byte for termination */
jbe@111 792 int sock;
jbe@111 793 path = luaL_checkstring(L, 1);
jbe@111 794 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 795 strcpy(sockaddr.sun_path, path);
jbe@111 796 sock = socket(
jbe@111 797 PF_LOCAL,
jbe@111 798 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 799 0
jbe@111 800 );
jbe@111 801 if (sock < 0) {
jbe@111 802 moonbr_io_errmsg();
jbe@111 803 lua_pushnil(L);
jbe@111 804 lua_pushstring(L, errmsg);
jbe@111 805 return 2;
jbe@111 806 }
jbe@111 807 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 808 if (!nonblocking && errno == EINTR) {
jbe@111 809 moonbr_io_errmsg();
jbe@111 810 close(sock);
jbe@111 811 lua_pushnil(L);
jbe@111 812 lua_pushstring(L, errmsg);
jbe@111 813 return 2;
jbe@111 814 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 815 moonbr_io_errmsg();
jbe@111 816 lua_pushnil(L);
jbe@111 817 lua_pushstring(L, errmsg);
jbe@111 818 return 2;
jbe@111 819 }
jbe@111 820 }
jbe@111 821 moonbr_io_pushhandle(L, sock);
jbe@111 822 return 1;
jbe@111 823 }
jbe@111 824
jbe@111 825 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 826 return moonbr_io_localconnect_impl(L, 0);
jbe@111 827 }
jbe@111 828
jbe@111 829 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 830 return moonbr_io_localconnect_impl(L, 1);
jbe@111 831 }
jbe@111 832
jbe@99 833 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 834 const char *host, *port;
jbe@98 835 struct addrinfo hints = { 0, };
jbe@98 836 struct addrinfo *res, *addrinfo;
jbe@98 837 int errcode;
jbe@98 838 int sock;
jbe@98 839 host = luaL_checkstring(L, 1);
jbe@98 840 port = luaL_checkstring(L, 2);
jbe@98 841 hints.ai_family = AF_UNSPEC;
jbe@98 842 hints.ai_socktype = SOCK_STREAM;
jbe@98 843 hints.ai_protocol = IPPROTO_TCP;
jbe@98 844 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 845 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 846 if (errcode) {
jbe@102 847 freeaddrinfo(res);
jbe@98 848 if (errcode == EAI_SYSTEM) {
jbe@98 849 moonbr_io_errmsg();
jbe@98 850 lua_pushnil(L);
jbe@98 851 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 852 } else {
jbe@98 853 lua_pushnil(L);
jbe@98 854 lua_pushstring(L, gai_strerror(errcode));
jbe@98 855 }
jbe@98 856 return 2;
jbe@98 857 }
jbe@98 858 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 859 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 860 }
jbe@98 861 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 862 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 863 }
jbe@98 864 addrinfo = res;
jbe@98 865 moonbr_io_tcpconnect_found:
jbe@99 866 sock = socket(
jbe@134 867 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 868 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 869 addrinfo->ai_protocol
jbe@99 870 );
jbe@98 871 if (sock < 0) {
jbe@98 872 moonbr_io_errmsg();
jbe@108 873 freeaddrinfo(res);
jbe@98 874 lua_pushnil(L);
jbe@98 875 lua_pushstring(L, errmsg);
jbe@108 876 return 2;
jbe@98 877 }
jbe@98 878 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 879 freeaddrinfo(res);
jbe@99 880 if (!nonblocking && errno == EINTR) {
jbe@99 881 moonbr_io_errmsg();
jbe@99 882 close(sock);
jbe@99 883 lua_pushnil(L);
jbe@99 884 lua_pushstring(L, errmsg);
jbe@99 885 return 2;
jbe@99 886 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 887 moonbr_io_errmsg();
jbe@99 888 lua_pushnil(L);
jbe@99 889 lua_pushstring(L, errmsg);
jbe@99 890 return 2;
jbe@99 891 }
jbe@108 892 } else {
jbe@108 893 freeaddrinfo(res);
jbe@98 894 }
jbe@107 895 moonbr_io_pushhandle(L, sock);
jbe@98 896 return 1;
jbe@98 897 }
jbe@98 898
jbe@99 899 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 900 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 901 }
jbe@99 902
jbe@99 903 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 904 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 905 }
jbe@99 906
jbe@112 907 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 908 moonbr_io_listener_t *listener;
jbe@112 909 const char *path;
jbe@118 910 struct stat sb;
jbe@112 911 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 912 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 913 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 914 ) - 1; /* one byte for termination */
jbe@112 915 int sock;
jbe@112 916 path = luaL_checkstring(L, 1);
jbe@112 917 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 918 strcpy(sockaddr.sun_path, path);
jbe@118 919 if (stat(path, &sb) == 0) {
jbe@118 920 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 921 }
jbe@112 922 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 923 listener->fd = -1;
jbe@112 924 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 925 sock = socket(
jbe@112 926 PF_LOCAL,
jbe@112 927 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 928 0
jbe@112 929 );
jbe@112 930 if (sock < 0) {
jbe@112 931 moonbr_io_errmsg();
jbe@112 932 lua_pushnil(L);
jbe@112 933 lua_pushstring(L, errmsg);
jbe@112 934 return 2;
jbe@112 935 }
jbe@112 936 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 937 moonbr_io_errmsg();
jbe@112 938 close(sock);
jbe@112 939 lua_pushnil(L);
jbe@112 940 lua_pushstring(L, errmsg);
jbe@112 941 return 2;
jbe@112 942 }
jbe@112 943 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 944 moonbr_io_errmsg();
jbe@112 945 close(sock);
jbe@112 946 lua_pushnil(L);
jbe@112 947 lua_pushstring(L, errmsg);
jbe@112 948 return 2;
jbe@112 949 }
jbe@112 950 listener->fd = sock;
jbe@118 951 listener->addrfam = AF_LOCAL;
jbe@112 952 listener->nonblocking = -1;
jbe@112 953 return 1;
jbe@112 954 }
jbe@112 955
jbe@108 956 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 957 moonbr_io_listener_t *listener;
jbe@108 958 const char *host, *port;
jbe@108 959 struct addrinfo hints = { 0, };
jbe@108 960 struct addrinfo *res, *addrinfo;
jbe@108 961 int errcode;
jbe@108 962 int sock;
jbe@108 963 host = luaL_optstring(L, 1, NULL);
jbe@108 964 port = luaL_checkstring(L, 2);
jbe@108 965 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 966 listener->fd = -1;
jbe@108 967 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 968 hints.ai_family = AF_UNSPEC;
jbe@108 969 hints.ai_socktype = SOCK_STREAM;
jbe@108 970 hints.ai_protocol = IPPROTO_TCP;
jbe@108 971 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 972 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 973 if (errcode) {
jbe@108 974 freeaddrinfo(res);
jbe@108 975 if (errcode == EAI_SYSTEM) {
jbe@108 976 moonbr_io_errmsg();
jbe@108 977 lua_pushnil(L);
jbe@108 978 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 979 } else {
jbe@108 980 lua_pushnil(L);
jbe@108 981 lua_pushstring(L, gai_strerror(errcode));
jbe@108 982 }
jbe@108 983 return 2;
jbe@108 984 }
jbe@108 985 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 986 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 987 }
jbe@108 988 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 989 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 990 }
jbe@108 991 addrinfo = res;
jbe@108 992 moonbr_io_tcpconnect_found:
jbe@118 993 listener->addrfam = addrinfo->ai_family;
jbe@108 994 sock = socket(
jbe@134 995 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 996 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 997 addrinfo->ai_protocol
jbe@108 998 );
jbe@108 999 if (sock < 0) {
jbe@108 1000 moonbr_io_errmsg();
jbe@108 1001 freeaddrinfo(res);
jbe@108 1002 lua_pushnil(L);
jbe@108 1003 lua_pushstring(L, errmsg);
jbe@108 1004 return 2;
jbe@108 1005 }
jbe@120 1006 {
jbe@120 1007 static const int reuseval = 1;
jbe@120 1008 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 1009 moonbr_io_errmsg();
jbe@120 1010 freeaddrinfo(res);
jbe@120 1011 close(sock);
jbe@120 1012 lua_pushnil(L);
jbe@120 1013 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 1014 return 2;
jbe@120 1015 }
jbe@120 1016 }
jbe@108 1017 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1018 moonbr_io_errmsg();
jbe@108 1019 freeaddrinfo(res);
jbe@108 1020 close(sock);
jbe@108 1021 lua_pushnil(L);
jbe@108 1022 lua_pushstring(L, errmsg);
jbe@108 1023 return 2;
jbe@108 1024 }
jbe@108 1025 freeaddrinfo(res);
jbe@108 1026 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1027 moonbr_io_errmsg();
jbe@108 1028 close(sock);
jbe@108 1029 lua_pushnil(L);
jbe@108 1030 lua_pushstring(L, errmsg);
jbe@108 1031 return 2;
jbe@108 1032 }
jbe@108 1033 listener->fd = sock;
jbe@108 1034 listener->nonblocking = -1;
jbe@108 1035 return 1;
jbe@108 1036 }
jbe@108 1037
jbe@108 1038 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1039 moonbr_io_listener_t *listener;
jbe@108 1040 int fd;
jbe@108 1041 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1042 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1043 if (listener->nonblocking != nonblocking) {
jbe@108 1044 int flags;
jbe@108 1045 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1046 if (flags == -1) {
jbe@108 1047 moonbr_io_errmsg();
jbe@108 1048 close(listener->fd);
jbe@108 1049 listener->fd = -1;
jbe@108 1050 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1051 }
jbe@108 1052 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1053 else flags &= ~O_NONBLOCK;
jbe@108 1054 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1055 moonbr_io_errmsg();
jbe@108 1056 close(listener->fd);
jbe@108 1057 listener->fd = -1;
jbe@108 1058 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1059 }
jbe@108 1060 listener->nonblocking = nonblocking;
jbe@108 1061 }
jbe@108 1062 while (1) {
jbe@108 1063 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1064 if (fd < 0) {
jbe@108 1065 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1066 lua_pushboolean(L, 0);
jbe@108 1067 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1068 return 2;
jbe@108 1069 } else if (errno != EINTR) {
jbe@108 1070 moonbr_io_errmsg();
jbe@108 1071 lua_pushnil(L);
jbe@108 1072 lua_pushstring(L, errmsg);
jbe@108 1073 return 2;
jbe@108 1074 }
jbe@108 1075 } else {
jbe@108 1076 moonbr_io_pushhandle(L, fd);
jbe@108 1077 return 1;
jbe@108 1078 }
jbe@108 1079 }
jbe@108 1080 }
jbe@108 1081
jbe@108 1082 static int moonbr_io_accept(lua_State *L) {
jbe@108 1083 return moonbr_io_accept_impl(L, 0);
jbe@108 1084 }
jbe@108 1085
jbe@108 1086 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1087 return moonbr_io_accept_impl(L, 1);
jbe@108 1088 }
jbe@108 1089
jbe@108 1090 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1091 moonbr_io_listener_t *listener;
jbe@118 1092 struct sockaddr_un addr;
jbe@118 1093 socklen_t addrlen;
jbe@118 1094 struct stat sb;
jbe@108 1095 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1096 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1097 addrlen = sizeof(addr);
jbe@118 1098 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1099 if (close(listener->fd)) {
jbe@108 1100 moonbr_io_errmsg();
jbe@108 1101 listener->fd = -1;
jbe@118 1102 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1103 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1104 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1105 }
jbe@118 1106 }
jbe@108 1107 lua_pushnil(L);
jbe@108 1108 lua_pushstring(L, errmsg);
jbe@108 1109 return 2;
jbe@108 1110 }
jbe@108 1111 listener->fd = -1;
jbe@118 1112 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1113 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1114 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1115 }
jbe@118 1116 }
jbe@108 1117 lua_pushboolean(L, 1);
jbe@108 1118 return 1;
jbe@108 1119 }
jbe@108 1120
jbe@108 1121 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1122 moonbr_io_listener_t *listener;
jbe@108 1123 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1124 if (listener->fd >= 0) close(listener->fd);
jbe@108 1125 listener->fd = -1;
jbe@108 1126 return 0;
jbe@108 1127 }
jbe@108 1128
jbe@106 1129 static int moonbr_io_poll(lua_State *L) {
jbe@106 1130 moonbr_io_handle_t *handle;
jbe@108 1131 moonbr_io_listener_t *listener;
jbe@106 1132 int fd, isnum;
jbe@106 1133 int nfds = 0;
jbe@106 1134 fd_set readfds, writefds, exceptfds;
jbe@106 1135 struct timeval timeout = {0, };
jbe@106 1136 int status;
jbe@106 1137 FD_ZERO(&readfds);
jbe@106 1138 FD_ZERO(&writefds);
jbe@106 1139 FD_ZERO(&exceptfds);
jbe@106 1140 if (!lua_isnoneornil(L, 1)) {
jbe@106 1141 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1142 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1143 if (lua_toboolean(L, -1)) {
jbe@106 1144 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1145 if (handle) {
jbe@109 1146 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1147 fd = handle->fd;
jbe@122 1148 if (
jbe@122 1149 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1150 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1151 ) {
jbe@109 1152 lua_pushboolean(L, 1);
jbe@109 1153 return 1;
jbe@109 1154 }
jbe@106 1155 } else {
jbe@108 1156 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1157 if (listener) {
jbe@108 1158 fd = listener->fd;
jbe@108 1159 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1160 } else {
jbe@108 1161 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1162 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1163 }
jbe@106 1164 }
jbe@138 1165 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1166 FD_SET(fd, &readfds);
jbe@106 1167 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1168 }
jbe@106 1169 }
jbe@106 1170 }
jbe@106 1171 if (!lua_isnoneornil(L, 2)) {
jbe@106 1172 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1173 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1174 if (lua_toboolean(L, -1)) {
jbe@106 1175 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1176 if (handle) {
jbe@109 1177 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1178 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1179 fd = handle->fd;
jbe@106 1180 } else {
jbe@108 1181 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1182 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1183 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1184 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1185 }
jbe@138 1186 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1187 FD_SET(fd, &writefds);
jbe@106 1188 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1189 }
jbe@106 1190 }
jbe@106 1191 }
jbe@106 1192 if (!lua_isnoneornil(L, 3)) {
jbe@106 1193 lua_Number n;
jbe@106 1194 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1195 if (isnum && n>=0 && n<100000000) {
jbe@106 1196 timeout.tv_sec = n;
jbe@106 1197 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1198 } else {
jbe@106 1199 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1200 }
jbe@106 1201 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1202 } else {
jbe@106 1203 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1204 }
jbe@106 1205 if (status == -1) {
jbe@106 1206 if (errno == EINTR) {
jbe@106 1207 lua_pushboolean(L, 0);
jbe@106 1208 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1209 return 2;
jbe@106 1210 } else {
jbe@106 1211 moonbr_io_errmsg();
jbe@106 1212 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1213 }
jbe@106 1214 } else if (status == 0) {
jbe@106 1215 lua_pushboolean(L, 0);
jbe@106 1216 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1217 return 2;
jbe@106 1218 } else {
jbe@106 1219 lua_pushboolean(L, 1);
jbe@106 1220 return 1;
jbe@106 1221 }
jbe@106 1222 }
jbe@106 1223
jbe@115 1224 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1225 lua_Number sub;
jbe@115 1226 struct timespec tp;
jbe@115 1227 sub = luaL_optnumber(L, 1, 0);
jbe@115 1228 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1229 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1230 }
jbe@115 1231 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1232 return 1;
jbe@115 1233 }
jbe@115 1234
jbe@79 1235 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1236 {"read", moonbr_io_read},
jbe@85 1237 {"read_nb", moonbr_io_read_nb},
jbe@140 1238 {"read_call", moonbr_io_read_call},
jbe@140 1239 {"read_yield", moonbr_io_read_yield},
jbe@86 1240 {"drain", moonbr_io_drain},
jbe@86 1241 {"drain_nb", moonbr_io_drain_nb},
jbe@80 1242 {"write", moonbr_io_write},
jbe@81 1243 {"write_nb", moonbr_io_write_nb},
jbe@80 1244 {"flush", moonbr_io_flush},
jbe@81 1245 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1246 {"finish", moonbr_io_finish},
jbe@87 1247 {"close", moonbr_io_close},
jbe@85 1248 {"reset", moonbr_io_reset},
jbe@79 1249 {NULL, NULL}
jbe@79 1250 };
jbe@79 1251
jbe@79 1252 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1253 {"__index", moonbr_io_handleindex},
jbe@79 1254 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1255 {"__gc", moonbr_io_handlegc},
jbe@108 1256 {NULL, NULL}
jbe@108 1257 };
jbe@108 1258
jbe@108 1259 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1260 {"accept", moonbr_io_accept},
jbe@108 1261 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1262 {"close", moonbr_io_unlisten},
jbe@108 1263 {NULL, NULL}
jbe@108 1264 };
jbe@108 1265
jbe@108 1266 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1267 {"__gc", moonbr_io_listenergc},
jbe@79 1268 {NULL, NULL}
jbe@79 1269 };
jbe@79 1270
jbe@79 1271 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1272 {"localconnect", moonbr_io_localconnect},
jbe@111 1273 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1274 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1275 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1276 {"locallisten", moonbr_io_locallisten},
jbe@108 1277 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1278 {"poll", moonbr_io_poll},
jbe@115 1279 {"timeref", moonbr_io_timeref},
jbe@79 1280 {NULL, NULL}
jbe@79 1281 };
jbe@79 1282
jbe@79 1283 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1284
jbe@113 1285 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1286
jbe@80 1287 lua_newtable(L); // module
jbe@80 1288
jbe@79 1289 lua_newtable(L); // public metatable
jbe@79 1290 lua_newtable(L); // handle methods
jbe@79 1291 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1292 lua_pushvalue(L, -1);
jbe@108 1293 lua_setfield(L, -4, "prototype_handle");
jbe@79 1294 lua_setfield(L, -2, "__index");
jbe@79 1295 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1296
jbe@79 1297 lua_newtable(L); // handle metatable
jbe@79 1298 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1299 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1300
jbe@108 1301 lua_newtable(L); // listener metatable
jbe@108 1302 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1303 lua_newtable(L); // listener methods
jbe@108 1304 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1305 lua_pushvalue(L, -1);
jbe@108 1306 lua_setfield(L, -4, "prototype_listener");
jbe@108 1307 lua_setfield(L, -2, "__index");
jbe@108 1308 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1309
jbe@79 1310 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1311 return 1;
jbe@79 1312
jbe@79 1313 }
jbe@79 1314

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