moonbridge

annotate moonbridge_io.c @ 141:845e3dce3774

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Fixed wrong treatment of Lua string buffer in drain mode
author jbe
date Fri May 01 04:05:31 2015 +0200 (2015-05-01)
parents 9ca22af4d4b1
children 8cd9acda3853
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@105 183 if (
jbe@105 184 maxread > 0 &&
jbe@105 185 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 186 ) {
jbe@105 187 remaining = maxread - luabufcnt;
jbe@85 188 } else if (terminatorlen) {
jbe@105 189 terminatorpos = memchr(
jbe@105 190 handle->readbuf + handle->readbufout,
jbe@105 191 terminator,
jbe@105 192 handle->readbufin - handle->readbufout
jbe@105 193 );
jbe@105 194 if (terminatorpos) remaining = 1 + (
jbe@105 195 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@105 196 );
jbe@85 197 }
jbe@105 198 if (remaining >= 0) {
jbe@86 199 if (!drain) {
jbe@105 200 luaL_addlstring(
jbe@105 201 &luabuf,
jbe@105 202 handle->readbuf + handle->readbufout,
jbe@105 203 remaining
jbe@105 204 );
jbe@86 205 luaL_pushresult(&luabuf);
jbe@90 206 } else {
jbe@105 207 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 208 }
jbe@105 209 handle->readbufout += remaining;
jbe@105 210 if (handle->readbufout == handle->readbufin) {
jbe@105 211 handle->readbufin = 0;
jbe@105 212 handle->readbufout =0;
jbe@105 213 }
jbe@104 214 handle->readerr = 0;
jbe@85 215 return 1;
jbe@85 216 }
jbe@105 217 if (!drain) luaL_addlstring(
jbe@105 218 &luabuf,
jbe@105 219 handle->readbuf + handle->readbufout,
jbe@105 220 handle->readbufin - handle->readbufout
jbe@105 221 );
jbe@105 222 luabufcnt += handle->readbufin - handle->readbufout;
jbe@85 223 do {
jbe@103 224 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 225 } while (bytesread < 0 && (errno == EINTR));
jbe@105 226 if (
jbe@105 227 bytesread == 0 || (
jbe@105 228 nonblocking &&
jbe@105 229 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 230 )
jbe@105 231 ) {
jbe@105 232 handle->readbufin = 0;
jbe@105 233 handle->readbufout = 0;
jbe@105 234 if (!drain) {
jbe@105 235 luaL_pushresult(&luabuf);
jbe@105 236 if (!luabufcnt && bytesread == 0) {
jbe@105 237 lua_pop(L, 1);
jbe@105 238 moonbr_io_read_impl_eof:
jbe@105 239 lua_pushboolean(L, 0);
jbe@105 240 lua_pushliteral(L, "End of file");
jbe@105 241 handle->readerr = 0;
jbe@105 242 return 2;
jbe@105 243 }
jbe@105 244 } else {
jbe@105 245 if (!luabufcnt && bytesread == 0) lua_pushboolean(L, 1);
jbe@105 246 else lua_pushboolean(L, luabufcnt);
jbe@105 247 }
jbe@105 248 handle->readerr = 0;
jbe@105 249 return 1;
jbe@105 250 }
jbe@103 251 if (bytesread < 0) {
jbe@85 252 moonbr_io_errmsg();
jbe@85 253 lua_pushnil(L);
jbe@85 254 lua_pushstring(L, errmsg);
jbe@85 255 return 2;
jbe@85 256 }
jbe@105 257 handle->readbufin = bytesread;
jbe@105 258 handle->readbufout = 0;
jbe@86 259 }
jbe@85 260 }
jbe@85 261
jbe@85 262 static int moonbr_io_read(lua_State *L) {
jbe@86 263 return moonbr_io_read_impl(L, 0, 0);
jbe@85 264 }
jbe@85 265
jbe@85 266 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 267 return moonbr_io_read_impl(L, 1, 0);
jbe@86 268 }
jbe@86 269
jbe@86 270 static int moonbr_io_drain(lua_State *L) {
jbe@86 271 return moonbr_io_read_impl(L, 0, 1);
jbe@86 272 }
jbe@86 273
jbe@86 274 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 275 return moonbr_io_read_impl(L, 1, 1);
jbe@85 276 }
jbe@85 277
jbe@140 278 #if LUA_VERSION_NUM >= 503
jbe@140 279 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 280 #else
jbe@140 281 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 282 #endif
jbe@140 283 size_t len, remaining;
jbe@140 284 const char *terminatorstr = NULL;
jbe@140 285 size_t terminatorlen = 0;
jbe@140 286 const char *chunk;
jbe@140 287 size_t chunklen;
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@140 299 if (lua_isnil(L, -2)) {
jbe@140 300 return 2;
jbe@140 301 } else if (!lua_toboolean(L, -2)) {
jbe@140 302 if (ctx) {
jbe@140 303 lua_pushnil(L);
jbe@140 304 lua_pushliteral(L, "Unexpected EOF");
jbe@140 305 }
jbe@140 306 return 2;
jbe@140 307 }
jbe@140 308 len = lua_rawlen(L, -2);
jbe@140 309 if (!len) {
jbe@140 310 lua_pop(L, 2);
jbe@140 311 } else {
jbe@140 312 lua_pop(L, 1);
jbe@140 313 if (!terminatorstr) {
jbe@140 314 terminatorstr = lua_tolstring(L, 4, &terminatorlen);
jbe@140 315 if (!terminatorstr) terminatorstr = "";
jbe@140 316 }
jbe@140 317 if (terminatorlen) chunk = lua_tolstring(L, -1, &chunklen);
jbe@140 318 if (ctx == 0) {
jbe@140 319 lua_replace(L, 5);
jbe@140 320 ctx = 1;
jbe@140 321 } else if (ctx == 1) {
jbe@140 322 lua_pushvalue(L, 5);
jbe@140 323 lua_newtable(L);
jbe@140 324 lua_replace(L, 5);
jbe@140 325 lua_rawseti(L, 5, 2);
jbe@140 326 lua_rawseti(L, 5, 1);
jbe@140 327 ctx = 2;
jbe@140 328 } else {
jbe@140 329 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 330 }
jbe@140 331 if (remaining) {
jbe@140 332 if (len >= remaining) break;
jbe@140 333 remaining -= len;
jbe@140 334 lua_pushinteger(L, remaining);
jbe@140 335 lua_replace(L, 3);
jbe@140 336 }
jbe@140 337 if (terminatorlen && chunk[chunklen-1] == terminatorstr[0]) break;
jbe@140 338 }
jbe@140 339 lua_pushvalue(L, 2);
jbe@140 340 lua_pushvalue(L, 1);
jbe@140 341 lua_pushliteral(L, "r");
jbe@140 342 lua_callk(L, 2, 0, ctx, moonbr_io_read_cont);
jbe@140 343 }
jbe@140 344 if (ctx == 1) {
jbe@140 345 lua_pushvalue(L, 5);
jbe@140 346 } else {
jbe@140 347 luaL_Buffer buf;
jbe@140 348 lua_Integer i, chunkcount;
jbe@140 349 chunkcount = lua_rawlen(L, 5);
jbe@140 350 luaL_buffinit(L, &buf);
jbe@140 351 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 352 lua_rawgeti(L, 5, i);
jbe@140 353 luaL_addvalue(&buf);
jbe@140 354 }
jbe@140 355 luaL_pushresult(&buf);
jbe@140 356 }
jbe@140 357 return 1;
jbe@140 358 }
jbe@140 359
jbe@140 360 static int moonbr_io_read_call(lua_State *L) {
jbe@140 361 lua_settop(L, 4);
jbe@140 362 lua_pushnil(L);
jbe@140 363 #if LUA_VERSION_NUM >= 503
jbe@140 364 return moonbr_io_read_cont(L, 0, 0);
jbe@140 365 #else
jbe@140 366 return moonbr_io_read_cont(L);
jbe@140 367 #endif
jbe@140 368 }
jbe@140 369
jbe@140 370 static int moonbr_io_read_yield(lua_State *L) {
jbe@140 371 int args;
jbe@140 372 lua_pushcfunction(L, moonbr_io_read_call);
jbe@140 373 lua_insert(L, 1);
jbe@140 374 args = lua_gettop(L);
jbe@140 375 lua_pushcfunction(L, moonbr_io_yield);
jbe@140 376 lua_insert(L, 3);
jbe@140 377 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall);
jbe@140 378 return lua_gettop(L);
jbe@140 379 }
jbe@140 380
jbe@81 381 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 382 moonbr_io_handle_t *handle;
jbe@80 383 int i, top;
jbe@80 384 const char *str;
jbe@92 385 size_t strlen;
jbe@103 386 ssize_t written;
jbe@80 387 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 388 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 389 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 390 if (handle->writeerr) {
jbe@80 391 lua_pushnil(L);
jbe@80 392 lua_pushliteral(L, "Previous write error");
jbe@80 393 return 2;
jbe@80 394 }
jbe@103 395 handle->writeerr = 1;
jbe@81 396 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 397 top = lua_gettop(L);
jbe@81 398 lua_getuservalue(L, 1);
jbe@103 399 lua_getfield(L, -1, "writequeue");
jbe@84 400 for (i=2; i<=top; i++) {
jbe@84 401 luaL_checklstring(L, i, &strlen);
jbe@84 402 lua_pushvalue(L, i);
jbe@84 403 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 404 handle->writeleft += strlen;
jbe@81 405 }
jbe@132 406 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 407 while (handle->writeqout != handle->writeqin) {
jbe@83 408 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 409 str = lua_tolstring(L, -1, &strlen);
jbe@92 410 while (handle->writeqoff < strlen) {
jbe@103 411 if (
jbe@132 412 strlen - handle->writeqoff <
jbe@103 413 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 414 ) {
jbe@103 415 memcpy(
jbe@103 416 handle->writebuf + handle->writebufin,
jbe@103 417 str + handle->writeqoff,
jbe@103 418 strlen - handle->writeqoff
jbe@103 419 );
jbe@103 420 handle->writebufin += strlen - handle->writeqoff;
jbe@80 421 break;
jbe@80 422 } else {
jbe@103 423 memcpy(
jbe@103 424 handle->writebuf + handle->writebufin,
jbe@103 425 str + handle->writeqoff,
jbe@103 426 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 427 );
jbe@103 428 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 429 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 430 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 431 written = write(
jbe@103 432 handle->fd,
jbe@103 433 handle->writebuf + handle->writebufout,
jbe@103 434 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 435 );
jbe@103 436 if (written < 0) {
jbe@81 437 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 438 goto moonbr_io_write_impl_block;
jbe@81 439 } else if (errno != EINTR) {
jbe@80 440 moonbr_io_errmsg();
jbe@80 441 lua_pushnil(L);
jbe@80 442 lua_pushstring(L, errmsg);
jbe@80 443 return 2;
jbe@80 444 }
jbe@103 445 } else {
jbe@103 446 handle->writebufout += written;
jbe@103 447 handle->writeleft -= written;
jbe@133 448 if (handle->flushedleft) {
jbe@133 449 if (written >= handle->flushedleft) {
jbe@133 450 handle->flushedleft = 0;
jbe@133 451 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 452 } else {
jbe@133 453 handle->flushedleft -= written;
jbe@133 454 }
jbe@133 455 }
jbe@80 456 }
jbe@80 457 }
jbe@103 458 handle->writebufin = 0;
jbe@103 459 handle->writebufout = 0;
jbe@80 460 }
jbe@80 461 }
jbe@81 462 handle->writeqoff = 0;
jbe@81 463 lua_pop(L, 1);
jbe@81 464 lua_pushnil(L);
jbe@83 465 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 466 }
jbe@132 467 while (handle->flushedleft) {
jbe@133 468 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 469 written = write(
jbe@132 470 handle->fd,
jbe@132 471 handle->writebuf + handle->writebufout,
jbe@132 472 handle->writebufin - handle->writebufout
jbe@132 473 );
jbe@132 474 if (written < 0) {
jbe@132 475 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 476 goto moonbr_io_write_impl_block;
jbe@132 477 } else if (errno != EINTR) {
jbe@132 478 moonbr_io_errmsg();
jbe@132 479 lua_pushnil(L);
jbe@132 480 lua_pushstring(L, errmsg);
jbe@132 481 return 2;
jbe@81 482 }
jbe@132 483 } else {
jbe@132 484 handle->writebufout += written;
jbe@132 485 handle->writeleft -= written;
jbe@133 486 if (handle->flushedleft) {
jbe@133 487 if (written >= handle->flushedleft) {
jbe@133 488 handle->flushedleft = 0;
jbe@133 489 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 490 } else {
jbe@133 491 handle->flushedleft -= written;
jbe@133 492 }
jbe@133 493 }
jbe@81 494 }
jbe@132 495 }
jbe@132 496 if (handle->writebufout == handle->writebufin) {
jbe@103 497 handle->writebufin = 0;
jbe@103 498 handle->writebufout = 0;
jbe@81 499 }
jbe@103 500 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 501 else lua_pushvalue(L, 1);
jbe@103 502 handle->writeerr = 0;
jbe@80 503 return 1;
jbe@81 504 moonbr_io_write_impl_block:
jbe@91 505 lua_pushinteger(L, handle->writeleft);
jbe@103 506 handle->writeerr = 0;
jbe@81 507 return 1;
jbe@81 508 }
jbe@81 509
jbe@81 510 static int moonbr_io_write(lua_State *L) {
jbe@81 511 return moonbr_io_write_impl(L, 0, 0);
jbe@81 512 }
jbe@81 513
jbe@81 514 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 515 return moonbr_io_write_impl(L, 1, 0);
jbe@80 516 }
jbe@80 517
jbe@80 518 static int moonbr_io_flush(lua_State *L) {
jbe@81 519 return moonbr_io_write_impl(L, 0, 1);
jbe@81 520 }
jbe@81 521
jbe@81 522 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 523 return moonbr_io_write_impl(L, 1, 1);
jbe@80 524 }
jbe@80 525
jbe@88 526 static int moonbr_io_finish(lua_State *L) {
jbe@88 527 moonbr_io_handle_t *handle;
jbe@88 528 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 529 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 530 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 531 if (handle->writeleft) {
jbe@94 532 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 533 lua_pushvalue(L, 1);
jbe@116 534 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 535 handle->finished = 1;
jbe@116 536 lua_error(L);
jbe@116 537 }
jbe@94 538 if (!lua_toboolean(L, -2)) {
jbe@94 539 handle->finished = 1;
jbe@94 540 return 2;
jbe@88 541 }
jbe@94 542 }
jbe@94 543 handle->finished = 1;
jbe@107 544 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 545 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 546 moonbr_io_errmsg();
jbe@88 547 lua_pushnil(L);
jbe@88 548 lua_pushstring(L, errmsg);
jbe@88 549 return 2;
jbe@88 550 }
jbe@94 551 } else {
jbe@94 552 if (close(handle->fd)) {
jbe@94 553 moonbr_io_errmsg();
jbe@94 554 handle->fd = -1;
jbe@94 555 lua_pushnil(L);
jbe@94 556 lua_pushstring(L, errmsg);
jbe@94 557 return 2;
jbe@94 558 }
jbe@94 559 handle->fd = -1; /* fake EOF on read */
jbe@88 560 }
jbe@88 561 lua_pushboolean(L, 1);
jbe@88 562 return 1;
jbe@88 563 }
jbe@88 564
jbe@94 565 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 566 moonbr_io_handle_t *handle;
jbe@83 567 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 568 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 569 if (!reset) {
jbe@87 570 if (handle->writeleft) {
jbe@87 571 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 572 lua_pushvalue(L, 1);
jbe@116 573 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 574 handle->closed = 1;
jbe@116 575 close(handle->fd);
jbe@116 576 handle->fd = -1;
jbe@116 577 lua_error(L);
jbe@116 578 }
jbe@129 579 handle->closed = 1;
jbe@87 580 if (!lua_toboolean(L, -2)) {
jbe@87 581 close(handle->fd);
jbe@87 582 handle->fd = -1;
jbe@87 583 return 2;
jbe@87 584 }
jbe@129 585 } else {
jbe@129 586 handle->closed = 1;
jbe@129 587 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 588 }
jbe@129 589 } else {
jbe@129 590 handle->closed = 1;
jbe@83 591 }
jbe@94 592 if (handle->fd >= 0) {
jbe@94 593 if (close(handle->fd)) {
jbe@94 594 moonbr_io_errmsg();
jbe@94 595 handle->fd = -1;
jbe@94 596 lua_pushnil(L);
jbe@94 597 lua_pushstring(L, errmsg);
jbe@94 598 return 2;
jbe@94 599 }
jbe@104 600 handle->fd = -1;
jbe@83 601 }
jbe@83 602 lua_pushboolean(L, 1);
jbe@83 603 return 1;
jbe@84 604
jbe@83 605 }
jbe@83 606
jbe@94 607 static int moonbr_io_close(lua_State *L) {
jbe@94 608 return moonbr_io_close_impl(L, 0);
jbe@94 609 }
jbe@94 610
jbe@84 611 static int moonbr_io_reset(lua_State *L) {
jbe@94 612 return moonbr_io_close_impl(L, 1);
jbe@84 613 }
jbe@84 614
jbe@108 615 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 616 moonbr_io_handle_t *handle;
jbe@88 617 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 618 if (handle->fd >= 0) {
jbe@88 619 lua_pushcfunction(L, moonbr_io_close);
jbe@88 620 lua_pushvalue(L, 1);
jbe@88 621 lua_pushinteger(L, 0);
jbe@88 622 lua_call(L, 2, 0);
jbe@88 623 }
jbe@88 624 return 0;
jbe@88 625 }
jbe@88 626
jbe@100 627 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 628 moonbr_io_handle_t *handle;
jbe@88 629 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 630 if (!handle->closed) {
jbe@100 631 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 632 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 633 lua_call(L, 1, 0);
jbe@88 634 }
jbe@88 635 }
jbe@88 636
jbe@107 637 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 638 moonbr_io_handle_t *handle;
jbe@107 639 struct sockaddr addr;
jbe@107 640 socklen_t addrlen;
jbe@79 641 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 642 handle->fd = fd;
jbe@107 643 addrlen = sizeof(addr);
jbe@107 644 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 645 if (errno != ENOTSOCK) {
jbe@107 646 moonbr_io_errmsg();
jbe@107 647 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 648 }
jbe@107 649 handle->issock = 0;
jbe@107 650 } else {
jbe@107 651 handle->issock = 1;
jbe@107 652 handle->addrfam = addr.sa_family;
jbe@107 653 }
jbe@94 654 handle->finished = 0;
jbe@94 655 handle->closed = 0;
jbe@81 656 handle->nonblocking = -1;
jbe@95 657 handle->nopush = -1;
jbe@85 658 handle->readerr = 0;
jbe@105 659 handle->readbufin = 0;
jbe@105 660 handle->readbufout = 0;
jbe@81 661 handle->writeerr = 0;
jbe@81 662 handle->writeleft = 0;
jbe@132 663 handle->flushedleft = 0;
jbe@83 664 handle->writeqin = 0;
jbe@83 665 handle->writeqout = 0;
jbe@81 666 handle->writeqoff = 0;
jbe@103 667 handle->writebufin = 0;
jbe@103 668 handle->writebufout = 0;
jbe@87 669 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 670 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 671 lua_setmetatable(L, -2);
jbe@79 672 lua_newtable(L); // uservalue
jbe@81 673 lua_newtable(L);
jbe@103 674 lua_setfield(L, -2, "writequeue");
jbe@79 675 lua_newtable(L); // public
jbe@107 676 if (handle->addrfam == AF_INET6) {
jbe@107 677 struct sockaddr_in6 addr_in6;
jbe@107 678 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 679 const char *addrstr;
jbe@107 680 addrlen = sizeof(addr_in6);
jbe@107 681 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 682 moonbr_io_errmsg();
jbe@107 683 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 684 }
jbe@107 685 if (addrlen > sizeof(addr_in6)) {
jbe@107 686 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 687 }
jbe@107 688 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 689 if (!addrstr) {
jbe@107 690 moonbr_io_errmsg();
jbe@107 691 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 692 } else {
jbe@107 693 lua_pushstring(L, addrstr);
jbe@107 694 lua_setfield(L, -2, "local_ip6");
jbe@107 695 }
jbe@107 696 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 697 lua_setfield(L, -2, "local_tcpport");
jbe@107 698 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 699 moonbr_io_errmsg();
jbe@107 700 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 701 }
jbe@107 702 if (addrlen > sizeof(addr_in6)) {
jbe@107 703 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 704 }
jbe@107 705 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 706 if (!addrstr) {
jbe@107 707 moonbr_io_errmsg();
jbe@107 708 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 709 } else {
jbe@107 710 lua_pushstring(L, addrstr);
jbe@107 711 lua_setfield(L, -2, "remote_ip6");
jbe@107 712 }
jbe@107 713 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 714 lua_setfield(L, -2, "remote_tcpport");
jbe@107 715 } else if (handle->addrfam == AF_INET) {
jbe@107 716 struct sockaddr_in addr_in;
jbe@107 717 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 718 const char *addrstr;
jbe@107 719 addrlen = sizeof(addr_in);
jbe@107 720 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 721 moonbr_io_errmsg();
jbe@107 722 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 723 }
jbe@107 724 if (addrlen > sizeof(addr_in)) {
jbe@107 725 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 726 }
jbe@107 727 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 728 if (!addrstr) {
jbe@107 729 moonbr_io_errmsg();
jbe@107 730 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 731 } else {
jbe@107 732 lua_pushstring(L, addrstr);
jbe@107 733 lua_setfield(L, -2, "local_ip4");
jbe@107 734 }
jbe@107 735 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 736 lua_setfield(L, -2, "local_tcpport");
jbe@107 737 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 738 moonbr_io_errmsg();
jbe@107 739 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 740 }
jbe@107 741 if (addrlen > sizeof(addr_in)) {
jbe@107 742 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 743 }
jbe@107 744 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 745 if (!addrstr) {
jbe@107 746 moonbr_io_errmsg();
jbe@107 747 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 748 } else {
jbe@107 749 lua_pushstring(L, addrstr);
jbe@107 750 lua_setfield(L, -2, "remote_ip4");
jbe@107 751 }
jbe@107 752 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 753 lua_setfield(L, -2, "remote_tcpport");
jbe@107 754 }
jbe@79 755 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 756 lua_setmetatable(L, -2);
jbe@79 757 lua_setfield(L, -2, "public");
jbe@79 758 lua_setuservalue(L, -2);
jbe@79 759 }
jbe@79 760
jbe@79 761 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 762 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 763 lua_getuservalue(L, 1);
jbe@79 764 lua_getfield(L, -1, "public");
jbe@79 765 lua_pushvalue(L, 2);
jbe@79 766 lua_gettable(L, -2);
jbe@79 767 return 1;
jbe@79 768 }
jbe@79 769
jbe@79 770 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 771 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 772 lua_getuservalue(L, 1);
jbe@79 773 lua_getfield(L, -1, "public");
jbe@79 774 lua_pushvalue(L, 2);
jbe@79 775 lua_pushvalue(L, 3);
jbe@79 776 lua_settable(L, -3);
jbe@79 777 return 0;
jbe@79 778 }
jbe@79 779
jbe@111 780 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 781 const char *path;
jbe@111 782 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 783 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 784 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 785 ) - 1; /* one byte for termination */
jbe@111 786 int sock;
jbe@111 787 path = luaL_checkstring(L, 1);
jbe@111 788 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 789 strcpy(sockaddr.sun_path, path);
jbe@111 790 sock = socket(
jbe@111 791 PF_LOCAL,
jbe@111 792 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 793 0
jbe@111 794 );
jbe@111 795 if (sock < 0) {
jbe@111 796 moonbr_io_errmsg();
jbe@111 797 lua_pushnil(L);
jbe@111 798 lua_pushstring(L, errmsg);
jbe@111 799 return 2;
jbe@111 800 }
jbe@111 801 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 802 if (!nonblocking && errno == EINTR) {
jbe@111 803 moonbr_io_errmsg();
jbe@111 804 close(sock);
jbe@111 805 lua_pushnil(L);
jbe@111 806 lua_pushstring(L, errmsg);
jbe@111 807 return 2;
jbe@111 808 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 809 moonbr_io_errmsg();
jbe@111 810 lua_pushnil(L);
jbe@111 811 lua_pushstring(L, errmsg);
jbe@111 812 return 2;
jbe@111 813 }
jbe@111 814 }
jbe@111 815 moonbr_io_pushhandle(L, sock);
jbe@111 816 return 1;
jbe@111 817 }
jbe@111 818
jbe@111 819 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 820 return moonbr_io_localconnect_impl(L, 0);
jbe@111 821 }
jbe@111 822
jbe@111 823 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 824 return moonbr_io_localconnect_impl(L, 1);
jbe@111 825 }
jbe@111 826
jbe@99 827 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 828 const char *host, *port;
jbe@98 829 struct addrinfo hints = { 0, };
jbe@98 830 struct addrinfo *res, *addrinfo;
jbe@98 831 int errcode;
jbe@98 832 int sock;
jbe@98 833 host = luaL_checkstring(L, 1);
jbe@98 834 port = luaL_checkstring(L, 2);
jbe@98 835 hints.ai_family = AF_UNSPEC;
jbe@98 836 hints.ai_socktype = SOCK_STREAM;
jbe@98 837 hints.ai_protocol = IPPROTO_TCP;
jbe@98 838 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 839 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 840 if (errcode) {
jbe@102 841 freeaddrinfo(res);
jbe@98 842 if (errcode == EAI_SYSTEM) {
jbe@98 843 moonbr_io_errmsg();
jbe@98 844 lua_pushnil(L);
jbe@98 845 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 846 } else {
jbe@98 847 lua_pushnil(L);
jbe@98 848 lua_pushstring(L, gai_strerror(errcode));
jbe@98 849 }
jbe@98 850 return 2;
jbe@98 851 }
jbe@98 852 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 853 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 854 }
jbe@98 855 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 856 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 857 }
jbe@98 858 addrinfo = res;
jbe@98 859 moonbr_io_tcpconnect_found:
jbe@99 860 sock = socket(
jbe@134 861 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 862 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 863 addrinfo->ai_protocol
jbe@99 864 );
jbe@98 865 if (sock < 0) {
jbe@98 866 moonbr_io_errmsg();
jbe@108 867 freeaddrinfo(res);
jbe@98 868 lua_pushnil(L);
jbe@98 869 lua_pushstring(L, errmsg);
jbe@108 870 return 2;
jbe@98 871 }
jbe@98 872 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 873 freeaddrinfo(res);
jbe@99 874 if (!nonblocking && errno == EINTR) {
jbe@99 875 moonbr_io_errmsg();
jbe@99 876 close(sock);
jbe@99 877 lua_pushnil(L);
jbe@99 878 lua_pushstring(L, errmsg);
jbe@99 879 return 2;
jbe@99 880 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 881 moonbr_io_errmsg();
jbe@99 882 lua_pushnil(L);
jbe@99 883 lua_pushstring(L, errmsg);
jbe@99 884 return 2;
jbe@99 885 }
jbe@108 886 } else {
jbe@108 887 freeaddrinfo(res);
jbe@98 888 }
jbe@107 889 moonbr_io_pushhandle(L, sock);
jbe@98 890 return 1;
jbe@98 891 }
jbe@98 892
jbe@99 893 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 894 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 895 }
jbe@99 896
jbe@99 897 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 898 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 899 }
jbe@99 900
jbe@112 901 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 902 moonbr_io_listener_t *listener;
jbe@112 903 const char *path;
jbe@118 904 struct stat sb;
jbe@112 905 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 906 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 907 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 908 ) - 1; /* one byte for termination */
jbe@112 909 int sock;
jbe@112 910 path = luaL_checkstring(L, 1);
jbe@112 911 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 912 strcpy(sockaddr.sun_path, path);
jbe@118 913 if (stat(path, &sb) == 0) {
jbe@118 914 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 915 }
jbe@112 916 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 917 listener->fd = -1;
jbe@112 918 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 919 sock = socket(
jbe@112 920 PF_LOCAL,
jbe@112 921 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 922 0
jbe@112 923 );
jbe@112 924 if (sock < 0) {
jbe@112 925 moonbr_io_errmsg();
jbe@112 926 lua_pushnil(L);
jbe@112 927 lua_pushstring(L, errmsg);
jbe@112 928 return 2;
jbe@112 929 }
jbe@112 930 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 931 moonbr_io_errmsg();
jbe@112 932 close(sock);
jbe@112 933 lua_pushnil(L);
jbe@112 934 lua_pushstring(L, errmsg);
jbe@112 935 return 2;
jbe@112 936 }
jbe@112 937 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 938 moonbr_io_errmsg();
jbe@112 939 close(sock);
jbe@112 940 lua_pushnil(L);
jbe@112 941 lua_pushstring(L, errmsg);
jbe@112 942 return 2;
jbe@112 943 }
jbe@112 944 listener->fd = sock;
jbe@118 945 listener->addrfam = AF_LOCAL;
jbe@112 946 listener->nonblocking = -1;
jbe@112 947 return 1;
jbe@112 948 }
jbe@112 949
jbe@108 950 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 951 moonbr_io_listener_t *listener;
jbe@108 952 const char *host, *port;
jbe@108 953 struct addrinfo hints = { 0, };
jbe@108 954 struct addrinfo *res, *addrinfo;
jbe@108 955 int errcode;
jbe@108 956 int sock;
jbe@108 957 host = luaL_optstring(L, 1, NULL);
jbe@108 958 port = luaL_checkstring(L, 2);
jbe@108 959 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 960 listener->fd = -1;
jbe@108 961 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 962 hints.ai_family = AF_UNSPEC;
jbe@108 963 hints.ai_socktype = SOCK_STREAM;
jbe@108 964 hints.ai_protocol = IPPROTO_TCP;
jbe@108 965 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 966 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 967 if (errcode) {
jbe@108 968 freeaddrinfo(res);
jbe@108 969 if (errcode == EAI_SYSTEM) {
jbe@108 970 moonbr_io_errmsg();
jbe@108 971 lua_pushnil(L);
jbe@108 972 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 973 } else {
jbe@108 974 lua_pushnil(L);
jbe@108 975 lua_pushstring(L, gai_strerror(errcode));
jbe@108 976 }
jbe@108 977 return 2;
jbe@108 978 }
jbe@108 979 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 980 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 981 }
jbe@108 982 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 983 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 984 }
jbe@108 985 addrinfo = res;
jbe@108 986 moonbr_io_tcpconnect_found:
jbe@118 987 listener->addrfam = addrinfo->ai_family;
jbe@108 988 sock = socket(
jbe@134 989 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 990 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 991 addrinfo->ai_protocol
jbe@108 992 );
jbe@108 993 if (sock < 0) {
jbe@108 994 moonbr_io_errmsg();
jbe@108 995 freeaddrinfo(res);
jbe@108 996 lua_pushnil(L);
jbe@108 997 lua_pushstring(L, errmsg);
jbe@108 998 return 2;
jbe@108 999 }
jbe@120 1000 {
jbe@120 1001 static const int reuseval = 1;
jbe@120 1002 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 1003 moonbr_io_errmsg();
jbe@120 1004 freeaddrinfo(res);
jbe@120 1005 close(sock);
jbe@120 1006 lua_pushnil(L);
jbe@120 1007 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 1008 return 2;
jbe@120 1009 }
jbe@120 1010 }
jbe@108 1011 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1012 moonbr_io_errmsg();
jbe@108 1013 freeaddrinfo(res);
jbe@108 1014 close(sock);
jbe@108 1015 lua_pushnil(L);
jbe@108 1016 lua_pushstring(L, errmsg);
jbe@108 1017 return 2;
jbe@108 1018 }
jbe@108 1019 freeaddrinfo(res);
jbe@108 1020 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1021 moonbr_io_errmsg();
jbe@108 1022 close(sock);
jbe@108 1023 lua_pushnil(L);
jbe@108 1024 lua_pushstring(L, errmsg);
jbe@108 1025 return 2;
jbe@108 1026 }
jbe@108 1027 listener->fd = sock;
jbe@108 1028 listener->nonblocking = -1;
jbe@108 1029 return 1;
jbe@108 1030 }
jbe@108 1031
jbe@108 1032 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1033 moonbr_io_listener_t *listener;
jbe@108 1034 int fd;
jbe@108 1035 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1036 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1037 if (listener->nonblocking != nonblocking) {
jbe@108 1038 int flags;
jbe@108 1039 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1040 if (flags == -1) {
jbe@108 1041 moonbr_io_errmsg();
jbe@108 1042 close(listener->fd);
jbe@108 1043 listener->fd = -1;
jbe@108 1044 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1045 }
jbe@108 1046 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1047 else flags &= ~O_NONBLOCK;
jbe@108 1048 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1049 moonbr_io_errmsg();
jbe@108 1050 close(listener->fd);
jbe@108 1051 listener->fd = -1;
jbe@108 1052 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1053 }
jbe@108 1054 listener->nonblocking = nonblocking;
jbe@108 1055 }
jbe@108 1056 while (1) {
jbe@108 1057 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1058 if (fd < 0) {
jbe@108 1059 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1060 lua_pushboolean(L, 0);
jbe@108 1061 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1062 return 2;
jbe@108 1063 } else if (errno != EINTR) {
jbe@108 1064 moonbr_io_errmsg();
jbe@108 1065 lua_pushnil(L);
jbe@108 1066 lua_pushstring(L, errmsg);
jbe@108 1067 return 2;
jbe@108 1068 }
jbe@108 1069 } else {
jbe@108 1070 moonbr_io_pushhandle(L, fd);
jbe@108 1071 return 1;
jbe@108 1072 }
jbe@108 1073 }
jbe@108 1074 }
jbe@108 1075
jbe@108 1076 static int moonbr_io_accept(lua_State *L) {
jbe@108 1077 return moonbr_io_accept_impl(L, 0);
jbe@108 1078 }
jbe@108 1079
jbe@108 1080 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1081 return moonbr_io_accept_impl(L, 1);
jbe@108 1082 }
jbe@108 1083
jbe@108 1084 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1085 moonbr_io_listener_t *listener;
jbe@118 1086 struct sockaddr_un addr;
jbe@118 1087 socklen_t addrlen;
jbe@118 1088 struct stat sb;
jbe@108 1089 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1090 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1091 addrlen = sizeof(addr);
jbe@118 1092 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1093 if (close(listener->fd)) {
jbe@108 1094 moonbr_io_errmsg();
jbe@108 1095 listener->fd = -1;
jbe@118 1096 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1097 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1098 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1099 }
jbe@118 1100 }
jbe@108 1101 lua_pushnil(L);
jbe@108 1102 lua_pushstring(L, errmsg);
jbe@108 1103 return 2;
jbe@108 1104 }
jbe@108 1105 listener->fd = -1;
jbe@118 1106 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1107 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1108 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1109 }
jbe@118 1110 }
jbe@108 1111 lua_pushboolean(L, 1);
jbe@108 1112 return 1;
jbe@108 1113 }
jbe@108 1114
jbe@108 1115 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1116 moonbr_io_listener_t *listener;
jbe@108 1117 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1118 if (listener->fd >= 0) close(listener->fd);
jbe@108 1119 listener->fd = -1;
jbe@108 1120 return 0;
jbe@108 1121 }
jbe@108 1122
jbe@106 1123 static int moonbr_io_poll(lua_State *L) {
jbe@106 1124 moonbr_io_handle_t *handle;
jbe@108 1125 moonbr_io_listener_t *listener;
jbe@106 1126 int fd, isnum;
jbe@106 1127 int nfds = 0;
jbe@106 1128 fd_set readfds, writefds, exceptfds;
jbe@106 1129 struct timeval timeout = {0, };
jbe@106 1130 int status;
jbe@106 1131 FD_ZERO(&readfds);
jbe@106 1132 FD_ZERO(&writefds);
jbe@106 1133 FD_ZERO(&exceptfds);
jbe@106 1134 if (!lua_isnoneornil(L, 1)) {
jbe@106 1135 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1136 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1137 if (lua_toboolean(L, -1)) {
jbe@106 1138 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1139 if (handle) {
jbe@109 1140 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1141 fd = handle->fd;
jbe@122 1142 if (
jbe@122 1143 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1144 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1145 ) {
jbe@109 1146 lua_pushboolean(L, 1);
jbe@109 1147 return 1;
jbe@109 1148 }
jbe@106 1149 } else {
jbe@108 1150 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1151 if (listener) {
jbe@108 1152 fd = listener->fd;
jbe@108 1153 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1154 } else {
jbe@108 1155 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1156 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1157 }
jbe@106 1158 }
jbe@138 1159 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1160 FD_SET(fd, &readfds);
jbe@106 1161 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1162 }
jbe@106 1163 }
jbe@106 1164 }
jbe@106 1165 if (!lua_isnoneornil(L, 2)) {
jbe@106 1166 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1167 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1168 if (lua_toboolean(L, -1)) {
jbe@106 1169 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1170 if (handle) {
jbe@109 1171 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1172 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1173 fd = handle->fd;
jbe@106 1174 } else {
jbe@108 1175 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1176 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1177 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1178 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1179 }
jbe@138 1180 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1181 FD_SET(fd, &writefds);
jbe@106 1182 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1183 }
jbe@106 1184 }
jbe@106 1185 }
jbe@106 1186 if (!lua_isnoneornil(L, 3)) {
jbe@106 1187 lua_Number n;
jbe@106 1188 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1189 if (isnum && n>=0 && n<100000000) {
jbe@106 1190 timeout.tv_sec = n;
jbe@106 1191 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1192 } else {
jbe@106 1193 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1194 }
jbe@106 1195 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1196 } else {
jbe@106 1197 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1198 }
jbe@106 1199 if (status == -1) {
jbe@106 1200 if (errno == EINTR) {
jbe@106 1201 lua_pushboolean(L, 0);
jbe@106 1202 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1203 return 2;
jbe@106 1204 } else {
jbe@106 1205 moonbr_io_errmsg();
jbe@106 1206 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1207 }
jbe@106 1208 } else if (status == 0) {
jbe@106 1209 lua_pushboolean(L, 0);
jbe@106 1210 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1211 return 2;
jbe@106 1212 } else {
jbe@106 1213 lua_pushboolean(L, 1);
jbe@106 1214 return 1;
jbe@106 1215 }
jbe@106 1216 }
jbe@106 1217
jbe@115 1218 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1219 lua_Number sub;
jbe@115 1220 struct timespec tp;
jbe@115 1221 sub = luaL_optnumber(L, 1, 0);
jbe@115 1222 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1223 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1224 }
jbe@115 1225 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1226 return 1;
jbe@115 1227 }
jbe@115 1228
jbe@79 1229 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1230 {"read", moonbr_io_read},
jbe@85 1231 {"read_nb", moonbr_io_read_nb},
jbe@140 1232 {"read_call", moonbr_io_read_call},
jbe@140 1233 {"read_yield", moonbr_io_read_yield},
jbe@86 1234 {"drain", moonbr_io_drain},
jbe@86 1235 {"drain_nb", moonbr_io_drain_nb},
jbe@80 1236 {"write", moonbr_io_write},
jbe@81 1237 {"write_nb", moonbr_io_write_nb},
jbe@80 1238 {"flush", moonbr_io_flush},
jbe@81 1239 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1240 {"finish", moonbr_io_finish},
jbe@87 1241 {"close", moonbr_io_close},
jbe@85 1242 {"reset", moonbr_io_reset},
jbe@79 1243 {NULL, NULL}
jbe@79 1244 };
jbe@79 1245
jbe@79 1246 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1247 {"__index", moonbr_io_handleindex},
jbe@79 1248 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1249 {"__gc", moonbr_io_handlegc},
jbe@108 1250 {NULL, NULL}
jbe@108 1251 };
jbe@108 1252
jbe@108 1253 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1254 {"accept", moonbr_io_accept},
jbe@108 1255 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1256 {"close", moonbr_io_unlisten},
jbe@108 1257 {NULL, NULL}
jbe@108 1258 };
jbe@108 1259
jbe@108 1260 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1261 {"__gc", moonbr_io_listenergc},
jbe@79 1262 {NULL, NULL}
jbe@79 1263 };
jbe@79 1264
jbe@79 1265 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1266 {"localconnect", moonbr_io_localconnect},
jbe@111 1267 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1268 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1269 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1270 {"locallisten", moonbr_io_locallisten},
jbe@108 1271 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1272 {"poll", moonbr_io_poll},
jbe@115 1273 {"timeref", moonbr_io_timeref},
jbe@79 1274 {NULL, NULL}
jbe@79 1275 };
jbe@79 1276
jbe@79 1277 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1278
jbe@113 1279 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1280
jbe@80 1281 lua_newtable(L); // module
jbe@80 1282
jbe@79 1283 lua_newtable(L); // public metatable
jbe@79 1284 lua_newtable(L); // handle methods
jbe@79 1285 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1286 lua_pushvalue(L, -1);
jbe@108 1287 lua_setfield(L, -4, "prototype_handle");
jbe@79 1288 lua_setfield(L, -2, "__index");
jbe@79 1289 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1290
jbe@79 1291 lua_newtable(L); // handle metatable
jbe@79 1292 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1293 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1294
jbe@108 1295 lua_newtable(L); // listener metatable
jbe@108 1296 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1297 lua_newtable(L); // listener methods
jbe@108 1298 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1299 lua_pushvalue(L, -1);
jbe@108 1300 lua_setfield(L, -4, "prototype_listener");
jbe@108 1301 lua_setfield(L, -2, "__index");
jbe@108 1302 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1303
jbe@79 1304 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1305 return 1;
jbe@79 1306
jbe@79 1307 }
jbe@79 1308

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