moonbridge

annotate moonbridge_io.c @ 144:e7fac0918f9c

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Added new methods drain_call, drain_yield
author jbe
date Sat May 02 14:31:55 2015 +0200 (2015-05-02)
parents 41da87a681d6
children bd88dfa4f294
rev   line source
jbe@79 1
jbe@137 2 #if defined(__linux__)
jbe@137 3 #define _GNU_SOURCE
jbe@137 4 #endif
jbe@79 5 #include <stdlib.h>
jbe@135 6 #include <stdint.h>
jbe@135 7 #include <string.h>
jbe@135 8 #include <errno.h>
jbe@79 9 #include <unistd.h>
jbe@135 10 #include <signal.h>
jbe@135 11 #include <fcntl.h>
jbe@135 12 #include <sys/stat.h>
jbe@79 13 #include <sys/socket.h>
jbe@111 14 #include <sys/un.h>
jbe@95 15 #include <netinet/in.h>
jbe@95 16 #include <netinet/tcp.h>
jbe@135 17 #include <sys/select.h>
jbe@136 18 #include <time.h>
jbe@135 19 #include <netdb.h>
jbe@107 20 #include <arpa/inet.h>
jbe@79 21
jbe@79 22 #include <lua.h>
jbe@79 23 #include <lauxlib.h>
jbe@79 24 #include <lualib.h>
jbe@79 25
jbe@80 26 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 27 #define MOONBR_IO_READBUFLEN 4096
jbe@80 28 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 29
jbe@108 30 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108 31
jbe@80 32 #define moonbr_io_errmsg() \
jbe@80 33 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 34 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 35
jbe@79 36 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 37 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108 38 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@79 39
jbe@79 40 typedef struct {
jbe@79 41 int fd;
jbe@107 42 int issock;
jbe@107 43 sa_family_t addrfam;
jbe@94 44 int finished;
jbe@94 45 int closed;
jbe@81 46 int nonblocking;
jbe@95 47 int nopush;
jbe@85 48 int readerr;
jbe@105 49 int readbufin;
jbe@105 50 int readbufout;
jbe@81 51 int writeerr;
jbe@83 52 size_t writeleft;
jbe@132 53 size_t flushedleft;
jbe@83 54 #if LUA_VERSION_NUM >= 503
jbe@83 55 lua_Integer writeqin;
jbe@83 56 lua_Integer writeqout;
jbe@83 57 #else
jbe@83 58 int writeqin;
jbe@83 59 int writeqout;
jbe@83 60 #endif
jbe@83 61 size_t writeqoff;
jbe@103 62 int writebufin;
jbe@103 63 int writebufout;
jbe@85 64 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 65 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 66 } moonbr_io_handle_t;
jbe@79 67
jbe@108 68 typedef struct {
jbe@108 69 int fd;
jbe@118 70 sa_family_t addrfam;
jbe@108 71 int nonblocking;
jbe@108 72 } moonbr_io_listener_t;
jbe@108 73
jbe@140 74 static int moonbr_io_yield(lua_State *L) {
jbe@140 75 return lua_yield(L, 0);
jbe@140 76 }
jbe@140 77
jbe@140 78 #if LUA_VERSION_NUM >= 503
jbe@140 79 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140 80 #else
jbe@140 81 static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140 82 #endif
jbe@140 83 return lua_gettop(L);
jbe@140 84 }
jbe@140 85
jbe@81 86 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 87 int flags;
jbe@95 88 if (handle->nonblocking == nonblocking) return;
jbe@95 89 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 90 if (flags == -1) {
jbe@95 91 moonbr_io_errmsg();
jbe@96 92 close(handle->fd);
jbe@96 93 handle->fd = -1;
jbe@96 94 handle->closed = 1;
jbe@95 95 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 96 }
jbe@95 97 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 98 else flags &= ~O_NONBLOCK;
jbe@95 99 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 100 moonbr_io_errmsg();
jbe@96 101 close(handle->fd);
jbe@96 102 handle->fd = -1;
jbe@96 103 handle->closed = 1;
jbe@95 104 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 105 }
jbe@95 106 handle->nonblocking = nonblocking;
jbe@81 107 }
jbe@81 108
jbe@87 109 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 110 struct linger lingerval = { 0, };
jbe@107 111 if (!handle->issock) return;
jbe@87 112 if (timeout >= 0) {
jbe@87 113 lingerval.l_onoff = 1;
jbe@87 114 lingerval.l_linger = timeout;
jbe@87 115 }
jbe@87 116 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 117 moonbr_io_errmsg();
jbe@96 118 close(handle->fd);
jbe@96 119 handle->fd = -1;
jbe@96 120 handle->closed = 1;
jbe@95 121 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 122 }
jbe@87 123 }
jbe@87 124
jbe@133 125 static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 126 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 127 if (
jbe@107 128 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 129 handle->nopush == nopush
jbe@107 130 ) return;
jbe@96 131 #if defined(TCP_NOPUSH)
jbe@96 132 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 133 #elif defined(TCP_CORK)
jbe@104 134 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 135 #endif
jbe@96 136 moonbr_io_errmsg();
jbe@96 137 close(handle->fd);
jbe@96 138 handle->fd = -1;
jbe@96 139 handle->closed = 1;
jbe@104 140 #if defined(TCP_NOPUSH)
jbe@96 141 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 142 #elif defined(TCP_CORK)
jbe@95 143 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 144 #endif
jbe@95 145 }
jbe@95 146 handle->nopush = nopush;
jbe@96 147 #else
jbe@96 148 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 149 #endif
jbe@95 150 }
jbe@95 151
jbe@86 152 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 153 moonbr_io_handle_t *handle;
jbe@85 154 lua_Integer maxread;
jbe@85 155 const char *terminatorstr;
jbe@85 156 size_t terminatorlen;
jbe@137 157 char terminator = 0; /* initialize to avoid compiler warning */
jbe@85 158 luaL_Buffer luabuf;
jbe@85 159 size_t luabufcnt = 0;
jbe@105 160 int remaining;
jbe@85 161 char *terminatorpos;
jbe@103 162 ssize_t bytesread;
jbe@85 163 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 164 maxread = luaL_optinteger(L, 2, 0);
jbe@85 165 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 166 if (terminatorlen) {
jbe@85 167 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 168 terminator = terminatorstr[0];
jbe@85 169 }
jbe@86 170 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 171 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 172 if (handle->readerr) {
jbe@85 173 lua_pushnil(L);
jbe@85 174 lua_pushliteral(L, "Previous read error");
jbe@85 175 return 2;
jbe@85 176 }
jbe@143 177 if (handle->fd < 0) {
jbe@143 178 /* fake EOF to simulate shutdown */
jbe@143 179 if (!drain) lua_pushliteral(L, "");
jbe@143 180 else lua_pushinteger(L, 0);
jbe@143 181 lua_pushliteral(L, "eof");
jbe@143 182 return 2;
jbe@143 183 }
jbe@105 184 handle->readerr = 1;
jbe@85 185 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 186 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 187 while (1) {
jbe@105 188 remaining = -1;
jbe@142 189 terminatorpos = NULL;
jbe@105 190 if (
jbe@105 191 maxread > 0 &&
jbe@143 192 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 193 ) {
jbe@142 194 remaining = (size_t)maxread - luabufcnt;
jbe@142 195 terminatorpos = memchr(
jbe@142 196 handle->readbuf + handle->readbufout,
jbe@142 197 terminator,
jbe@142 198 remaining
jbe@142 199 );
jbe@85 200 } else if (terminatorlen) {
jbe@105 201 terminatorpos = memchr(
jbe@105 202 handle->readbuf + handle->readbufout,
jbe@105 203 terminator,
jbe@105 204 handle->readbufin - handle->readbufout
jbe@105 205 );
jbe@85 206 }
jbe@142 207 if (terminatorpos) remaining = 1 + (
jbe@142 208 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142 209 );
jbe@105 210 if (remaining >= 0) {
jbe@86 211 if (!drain) {
jbe@105 212 luaL_addlstring(
jbe@105 213 &luabuf,
jbe@105 214 handle->readbuf + handle->readbufout,
jbe@105 215 remaining
jbe@105 216 );
jbe@86 217 luaL_pushresult(&luabuf);
jbe@90 218 } else {
jbe@105 219 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 220 }
jbe@143 221 if (terminatorpos) lua_pushliteral(L, "term");
jbe@143 222 else lua_pushliteral(L, "maxlen");
jbe@105 223 handle->readbufout += remaining;
jbe@105 224 if (handle->readbufout == handle->readbufin) {
jbe@105 225 handle->readbufin = 0;
jbe@143 226 handle->readbufout = 0;
jbe@105 227 }
jbe@104 228 handle->readerr = 0;
jbe@143 229 return 2;
jbe@85 230 }
jbe@105 231 if (!drain) luaL_addlstring(
jbe@105 232 &luabuf,
jbe@105 233 handle->readbuf + handle->readbufout,
jbe@105 234 handle->readbufin - handle->readbufout
jbe@105 235 );
jbe@105 236 luabufcnt += handle->readbufin - handle->readbufout;
jbe@143 237 handle->readbufout = 0;
jbe@85 238 do {
jbe@103 239 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 240 } while (bytesread < 0 && (errno == EINTR));
jbe@105 241 if (
jbe@105 242 bytesread == 0 || (
jbe@105 243 nonblocking &&
jbe@105 244 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 245 )
jbe@105 246 ) {
jbe@105 247 handle->readbufin = 0;
jbe@143 248 if (!drain) luaL_pushresult(&luabuf);
jbe@143 249 else lua_pushinteger(L, luabufcnt);
jbe@143 250 if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143 251 else lua_pushliteral(L, "block");
jbe@105 252 handle->readerr = 0;
jbe@143 253 return 2;
jbe@105 254 }
jbe@103 255 if (bytesread < 0) {
jbe@85 256 moonbr_io_errmsg();
jbe@85 257 lua_pushnil(L);
jbe@85 258 lua_pushstring(L, errmsg);
jbe@85 259 return 2;
jbe@85 260 }
jbe@105 261 handle->readbufin = bytesread;
jbe@86 262 }
jbe@85 263 }
jbe@85 264
jbe@85 265 static int moonbr_io_read(lua_State *L) {
jbe@86 266 return moonbr_io_read_impl(L, 0, 0);
jbe@85 267 }
jbe@85 268
jbe@85 269 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 270 return moonbr_io_read_impl(L, 1, 0);
jbe@86 271 }
jbe@86 272
jbe@86 273 static int moonbr_io_drain(lua_State *L) {
jbe@86 274 return moonbr_io_read_impl(L, 0, 1);
jbe@86 275 }
jbe@86 276
jbe@86 277 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 278 return moonbr_io_read_impl(L, 1, 1);
jbe@85 279 }
jbe@85 280
jbe@140 281 #if LUA_VERSION_NUM >= 503
jbe@140 282 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 283 #else
jbe@140 284 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 285 #endif
jbe@143 286 lua_Integer remaining;
jbe@143 287 size_t len;
jbe@140 288 #if !(LUA_VERSION_NUM >= 503)
jbe@140 289 int ctx = 0;
jbe@140 290 lua_getctx(L, &ctx);
jbe@140 291 #endif
jbe@140 292 remaining = lua_tointeger(L, 3);
jbe@140 293 while (1) {
jbe@140 294 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140 295 lua_pushvalue(L, 1);
jbe@140 296 lua_pushvalue(L, 3);
jbe@140 297 lua_pushvalue(L, 4);
jbe@140 298 lua_call(L, 3, 2);
jbe@143 299 if (lua_isnil(L, -2)) return 2;
jbe@143 300 lua_insert(L, -2);
jbe@143 301 len = lua_rawlen(L, -1);
jbe@143 302 if (ctx == 0) {
jbe@143 303 lua_replace(L, 5);
jbe@143 304 ctx = 1;
jbe@143 305 } else if (ctx == 1) {
jbe@143 306 lua_pushvalue(L, 5);
jbe@143 307 lua_newtable(L);
jbe@143 308 lua_replace(L, 5);
jbe@143 309 lua_rawseti(L, 5, 2);
jbe@143 310 lua_rawseti(L, 5, 1);
jbe@143 311 ctx = 2;
jbe@140 312 } else {
jbe@143 313 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 314 }
jbe@144 315 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 316 lua_pop(L, 1);
jbe@144 317 if (remaining >= 0 && len) {
jbe@143 318 remaining -= len;
jbe@143 319 lua_pushinteger(L, remaining);
jbe@143 320 lua_replace(L, 3);
jbe@143 321 }
jbe@140 322 lua_pushvalue(L, 2);
jbe@140 323 lua_pushvalue(L, 1);
jbe@140 324 lua_pushliteral(L, "r");
jbe@140 325 lua_callk(L, 2, 0, ctx, moonbr_io_read_cont);
jbe@140 326 }
jbe@140 327 if (ctx == 1) {
jbe@140 328 lua_pushvalue(L, 5);
jbe@140 329 } else {
jbe@140 330 luaL_Buffer buf;
jbe@140 331 lua_Integer i, chunkcount;
jbe@140 332 chunkcount = lua_rawlen(L, 5);
jbe@140 333 luaL_buffinit(L, &buf);
jbe@140 334 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 335 lua_rawgeti(L, 5, i);
jbe@140 336 luaL_addvalue(&buf);
jbe@140 337 }
jbe@140 338 luaL_pushresult(&buf);
jbe@140 339 }
jbe@143 340 lua_pushvalue(L, -2);
jbe@143 341 return 2;
jbe@140 342 }
jbe@140 343
jbe@140 344 static int moonbr_io_read_call(lua_State *L) {
jbe@140 345 lua_settop(L, 4);
jbe@140 346 lua_pushnil(L);
jbe@140 347 #if LUA_VERSION_NUM >= 503
jbe@140 348 return moonbr_io_read_cont(L, 0, 0);
jbe@140 349 #else
jbe@140 350 return moonbr_io_read_cont(L);
jbe@140 351 #endif
jbe@140 352 }
jbe@140 353
jbe@140 354 static int moonbr_io_read_yield(lua_State *L) {
jbe@140 355 int args;
jbe@140 356 lua_pushcfunction(L, moonbr_io_read_call);
jbe@140 357 lua_insert(L, 1);
jbe@140 358 args = lua_gettop(L);
jbe@140 359 lua_pushcfunction(L, moonbr_io_yield);
jbe@140 360 lua_insert(L, 3);
jbe@140 361 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall);
jbe@140 362 return lua_gettop(L);
jbe@140 363 }
jbe@140 364
jbe@144 365 #if LUA_VERSION_NUM >= 503
jbe@144 366 static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@144 367 #else
jbe@144 368 static int moonbr_io_drain_cont(lua_State *L) {
jbe@144 369 #endif
jbe@144 370 lua_Integer remaining, len;
jbe@144 371 size_t totallen = 0;
jbe@144 372 #if !(LUA_VERSION_NUM >= 503)
jbe@144 373 int ctx = 0;
jbe@144 374 lua_getctx(L, &ctx);
jbe@144 375 #endif
jbe@144 376 remaining = lua_tointeger(L, 3);
jbe@144 377 while (1) {
jbe@144 378 lua_pushcfunction(L, moonbr_io_drain_nb);
jbe@144 379 lua_pushvalue(L, 1);
jbe@144 380 lua_pushvalue(L, 3);
jbe@144 381 lua_pushvalue(L, 4);
jbe@144 382 lua_call(L, 3, 2);
jbe@144 383 if (lua_isnil(L, -2)) return 2;
jbe@144 384 lua_insert(L, -2);
jbe@144 385 len = lua_tointeger(L, -1);
jbe@144 386 lua_pop(L, 1);
jbe@144 387 totallen += len;
jbe@144 388 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 389 lua_pop(L, 1);
jbe@144 390 if (remaining >= 0 && len) {
jbe@144 391 remaining -= len;
jbe@144 392 lua_pushinteger(L, remaining);
jbe@144 393 lua_replace(L, 3);
jbe@144 394 }
jbe@144 395 lua_pushvalue(L, 2);
jbe@144 396 lua_pushvalue(L, 1);
jbe@144 397 lua_pushliteral(L, "r");
jbe@144 398 lua_callk(L, 2, 0, ctx, moonbr_io_drain_cont);
jbe@144 399 }
jbe@144 400 lua_pushinteger(L, totallen);
jbe@144 401 lua_pushvalue(L, -2);
jbe@144 402 return 2;
jbe@144 403 }
jbe@144 404
jbe@144 405 static int moonbr_io_drain_call(lua_State *L) {
jbe@144 406 #if LUA_VERSION_NUM >= 503
jbe@144 407 return moonbr_io_drain_cont(L, 0, 0);
jbe@144 408 #else
jbe@144 409 return moonbr_io_drain_cont(L);
jbe@144 410 #endif
jbe@144 411 }
jbe@144 412
jbe@144 413 static int moonbr_io_drain_yield(lua_State *L) {
jbe@144 414 int args;
jbe@144 415 lua_pushcfunction(L, moonbr_io_drain_call);
jbe@144 416 lua_insert(L, 1);
jbe@144 417 args = lua_gettop(L);
jbe@144 418 lua_pushcfunction(L, moonbr_io_yield);
jbe@144 419 lua_insert(L, 3);
jbe@144 420 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall);
jbe@144 421 return lua_gettop(L);
jbe@144 422 }
jbe@144 423
jbe@81 424 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 425 moonbr_io_handle_t *handle;
jbe@80 426 int i, top;
jbe@80 427 const char *str;
jbe@92 428 size_t strlen;
jbe@103 429 ssize_t written;
jbe@80 430 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 431 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 432 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 433 if (handle->writeerr) {
jbe@80 434 lua_pushnil(L);
jbe@80 435 lua_pushliteral(L, "Previous write error");
jbe@80 436 return 2;
jbe@80 437 }
jbe@103 438 handle->writeerr = 1;
jbe@81 439 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 440 top = lua_gettop(L);
jbe@81 441 lua_getuservalue(L, 1);
jbe@103 442 lua_getfield(L, -1, "writequeue");
jbe@84 443 for (i=2; i<=top; i++) {
jbe@84 444 luaL_checklstring(L, i, &strlen);
jbe@84 445 lua_pushvalue(L, i);
jbe@84 446 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 447 handle->writeleft += strlen;
jbe@81 448 }
jbe@132 449 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 450 while (handle->writeqout != handle->writeqin) {
jbe@83 451 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 452 str = lua_tolstring(L, -1, &strlen);
jbe@92 453 while (handle->writeqoff < strlen) {
jbe@103 454 if (
jbe@132 455 strlen - handle->writeqoff <
jbe@103 456 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 457 ) {
jbe@103 458 memcpy(
jbe@103 459 handle->writebuf + handle->writebufin,
jbe@103 460 str + handle->writeqoff,
jbe@103 461 strlen - handle->writeqoff
jbe@103 462 );
jbe@103 463 handle->writebufin += strlen - handle->writeqoff;
jbe@80 464 break;
jbe@80 465 } else {
jbe@103 466 memcpy(
jbe@103 467 handle->writebuf + handle->writebufin,
jbe@103 468 str + handle->writeqoff,
jbe@103 469 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 470 );
jbe@103 471 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 472 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 473 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 474 written = write(
jbe@103 475 handle->fd,
jbe@103 476 handle->writebuf + handle->writebufout,
jbe@103 477 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 478 );
jbe@103 479 if (written < 0) {
jbe@81 480 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 481 goto moonbr_io_write_impl_block;
jbe@81 482 } else if (errno != EINTR) {
jbe@80 483 moonbr_io_errmsg();
jbe@80 484 lua_pushnil(L);
jbe@80 485 lua_pushstring(L, errmsg);
jbe@80 486 return 2;
jbe@80 487 }
jbe@103 488 } else {
jbe@103 489 handle->writebufout += written;
jbe@103 490 handle->writeleft -= written;
jbe@133 491 if (handle->flushedleft) {
jbe@133 492 if (written >= handle->flushedleft) {
jbe@133 493 handle->flushedleft = 0;
jbe@133 494 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 495 } else {
jbe@133 496 handle->flushedleft -= written;
jbe@133 497 }
jbe@133 498 }
jbe@80 499 }
jbe@80 500 }
jbe@103 501 handle->writebufin = 0;
jbe@103 502 handle->writebufout = 0;
jbe@80 503 }
jbe@80 504 }
jbe@81 505 handle->writeqoff = 0;
jbe@81 506 lua_pop(L, 1);
jbe@81 507 lua_pushnil(L);
jbe@83 508 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 509 }
jbe@132 510 while (handle->flushedleft) {
jbe@133 511 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 512 written = write(
jbe@132 513 handle->fd,
jbe@132 514 handle->writebuf + handle->writebufout,
jbe@132 515 handle->writebufin - handle->writebufout
jbe@132 516 );
jbe@132 517 if (written < 0) {
jbe@132 518 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 519 goto moonbr_io_write_impl_block;
jbe@132 520 } else if (errno != EINTR) {
jbe@132 521 moonbr_io_errmsg();
jbe@132 522 lua_pushnil(L);
jbe@132 523 lua_pushstring(L, errmsg);
jbe@132 524 return 2;
jbe@81 525 }
jbe@132 526 } else {
jbe@132 527 handle->writebufout += written;
jbe@132 528 handle->writeleft -= written;
jbe@133 529 if (handle->flushedleft) {
jbe@133 530 if (written >= handle->flushedleft) {
jbe@133 531 handle->flushedleft = 0;
jbe@133 532 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 533 } else {
jbe@133 534 handle->flushedleft -= written;
jbe@133 535 }
jbe@133 536 }
jbe@81 537 }
jbe@132 538 }
jbe@132 539 if (handle->writebufout == handle->writebufin) {
jbe@103 540 handle->writebufin = 0;
jbe@103 541 handle->writebufout = 0;
jbe@81 542 }
jbe@103 543 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 544 else lua_pushvalue(L, 1);
jbe@103 545 handle->writeerr = 0;
jbe@80 546 return 1;
jbe@81 547 moonbr_io_write_impl_block:
jbe@91 548 lua_pushinteger(L, handle->writeleft);
jbe@103 549 handle->writeerr = 0;
jbe@81 550 return 1;
jbe@81 551 }
jbe@81 552
jbe@81 553 static int moonbr_io_write(lua_State *L) {
jbe@81 554 return moonbr_io_write_impl(L, 0, 0);
jbe@81 555 }
jbe@81 556
jbe@81 557 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 558 return moonbr_io_write_impl(L, 1, 0);
jbe@80 559 }
jbe@80 560
jbe@80 561 static int moonbr_io_flush(lua_State *L) {
jbe@81 562 return moonbr_io_write_impl(L, 0, 1);
jbe@81 563 }
jbe@81 564
jbe@81 565 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 566 return moonbr_io_write_impl(L, 1, 1);
jbe@80 567 }
jbe@80 568
jbe@88 569 static int moonbr_io_finish(lua_State *L) {
jbe@88 570 moonbr_io_handle_t *handle;
jbe@88 571 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 572 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 573 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 574 if (handle->writeleft) {
jbe@94 575 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 576 lua_pushvalue(L, 1);
jbe@116 577 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 578 handle->finished = 1;
jbe@116 579 lua_error(L);
jbe@116 580 }
jbe@94 581 if (!lua_toboolean(L, -2)) {
jbe@94 582 handle->finished = 1;
jbe@94 583 return 2;
jbe@88 584 }
jbe@94 585 }
jbe@94 586 handle->finished = 1;
jbe@107 587 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 588 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 589 moonbr_io_errmsg();
jbe@88 590 lua_pushnil(L);
jbe@88 591 lua_pushstring(L, errmsg);
jbe@88 592 return 2;
jbe@88 593 }
jbe@94 594 } else {
jbe@94 595 if (close(handle->fd)) {
jbe@94 596 moonbr_io_errmsg();
jbe@94 597 handle->fd = -1;
jbe@94 598 lua_pushnil(L);
jbe@94 599 lua_pushstring(L, errmsg);
jbe@94 600 return 2;
jbe@94 601 }
jbe@94 602 handle->fd = -1; /* fake EOF on read */
jbe@88 603 }
jbe@88 604 lua_pushboolean(L, 1);
jbe@88 605 return 1;
jbe@88 606 }
jbe@88 607
jbe@94 608 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 609 moonbr_io_handle_t *handle;
jbe@83 610 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 611 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 612 if (!reset) {
jbe@87 613 if (handle->writeleft) {
jbe@87 614 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 615 lua_pushvalue(L, 1);
jbe@116 616 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 617 handle->closed = 1;
jbe@116 618 close(handle->fd);
jbe@116 619 handle->fd = -1;
jbe@116 620 lua_error(L);
jbe@116 621 }
jbe@129 622 handle->closed = 1;
jbe@87 623 if (!lua_toboolean(L, -2)) {
jbe@87 624 close(handle->fd);
jbe@87 625 handle->fd = -1;
jbe@87 626 return 2;
jbe@87 627 }
jbe@129 628 } else {
jbe@129 629 handle->closed = 1;
jbe@129 630 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 631 }
jbe@129 632 } else {
jbe@129 633 handle->closed = 1;
jbe@83 634 }
jbe@94 635 if (handle->fd >= 0) {
jbe@94 636 if (close(handle->fd)) {
jbe@94 637 moonbr_io_errmsg();
jbe@94 638 handle->fd = -1;
jbe@94 639 lua_pushnil(L);
jbe@94 640 lua_pushstring(L, errmsg);
jbe@94 641 return 2;
jbe@94 642 }
jbe@104 643 handle->fd = -1;
jbe@83 644 }
jbe@83 645 lua_pushboolean(L, 1);
jbe@83 646 return 1;
jbe@84 647
jbe@83 648 }
jbe@83 649
jbe@94 650 static int moonbr_io_close(lua_State *L) {
jbe@94 651 return moonbr_io_close_impl(L, 0);
jbe@94 652 }
jbe@94 653
jbe@84 654 static int moonbr_io_reset(lua_State *L) {
jbe@94 655 return moonbr_io_close_impl(L, 1);
jbe@84 656 }
jbe@84 657
jbe@108 658 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 659 moonbr_io_handle_t *handle;
jbe@88 660 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 661 if (handle->fd >= 0) {
jbe@88 662 lua_pushcfunction(L, moonbr_io_close);
jbe@88 663 lua_pushvalue(L, 1);
jbe@88 664 lua_pushinteger(L, 0);
jbe@88 665 lua_call(L, 2, 0);
jbe@88 666 }
jbe@88 667 return 0;
jbe@88 668 }
jbe@88 669
jbe@100 670 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 671 moonbr_io_handle_t *handle;
jbe@88 672 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 673 if (!handle->closed) {
jbe@100 674 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 675 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 676 lua_call(L, 1, 0);
jbe@88 677 }
jbe@88 678 }
jbe@88 679
jbe@107 680 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 681 moonbr_io_handle_t *handle;
jbe@107 682 struct sockaddr addr;
jbe@107 683 socklen_t addrlen;
jbe@79 684 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 685 handle->fd = fd;
jbe@107 686 addrlen = sizeof(addr);
jbe@107 687 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 688 if (errno != ENOTSOCK) {
jbe@107 689 moonbr_io_errmsg();
jbe@107 690 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 691 }
jbe@107 692 handle->issock = 0;
jbe@107 693 } else {
jbe@107 694 handle->issock = 1;
jbe@107 695 handle->addrfam = addr.sa_family;
jbe@107 696 }
jbe@94 697 handle->finished = 0;
jbe@94 698 handle->closed = 0;
jbe@81 699 handle->nonblocking = -1;
jbe@95 700 handle->nopush = -1;
jbe@85 701 handle->readerr = 0;
jbe@105 702 handle->readbufin = 0;
jbe@105 703 handle->readbufout = 0;
jbe@81 704 handle->writeerr = 0;
jbe@81 705 handle->writeleft = 0;
jbe@132 706 handle->flushedleft = 0;
jbe@83 707 handle->writeqin = 0;
jbe@83 708 handle->writeqout = 0;
jbe@81 709 handle->writeqoff = 0;
jbe@103 710 handle->writebufin = 0;
jbe@103 711 handle->writebufout = 0;
jbe@87 712 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 713 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 714 lua_setmetatable(L, -2);
jbe@79 715 lua_newtable(L); // uservalue
jbe@81 716 lua_newtable(L);
jbe@103 717 lua_setfield(L, -2, "writequeue");
jbe@79 718 lua_newtable(L); // public
jbe@107 719 if (handle->addrfam == AF_INET6) {
jbe@107 720 struct sockaddr_in6 addr_in6;
jbe@107 721 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 722 const char *addrstr;
jbe@107 723 addrlen = sizeof(addr_in6);
jbe@107 724 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 725 moonbr_io_errmsg();
jbe@107 726 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 727 }
jbe@107 728 if (addrlen > sizeof(addr_in6)) {
jbe@107 729 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 730 }
jbe@107 731 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 732 if (!addrstr) {
jbe@107 733 moonbr_io_errmsg();
jbe@107 734 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 735 } else {
jbe@107 736 lua_pushstring(L, addrstr);
jbe@107 737 lua_setfield(L, -2, "local_ip6");
jbe@107 738 }
jbe@107 739 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 740 lua_setfield(L, -2, "local_tcpport");
jbe@107 741 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 742 moonbr_io_errmsg();
jbe@107 743 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 744 }
jbe@107 745 if (addrlen > sizeof(addr_in6)) {
jbe@107 746 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 747 }
jbe@107 748 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 749 if (!addrstr) {
jbe@107 750 moonbr_io_errmsg();
jbe@107 751 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 752 } else {
jbe@107 753 lua_pushstring(L, addrstr);
jbe@107 754 lua_setfield(L, -2, "remote_ip6");
jbe@107 755 }
jbe@107 756 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 757 lua_setfield(L, -2, "remote_tcpport");
jbe@107 758 } else if (handle->addrfam == AF_INET) {
jbe@107 759 struct sockaddr_in addr_in;
jbe@107 760 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 761 const char *addrstr;
jbe@107 762 addrlen = sizeof(addr_in);
jbe@107 763 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 764 moonbr_io_errmsg();
jbe@107 765 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 766 }
jbe@107 767 if (addrlen > sizeof(addr_in)) {
jbe@107 768 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 769 }
jbe@107 770 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 771 if (!addrstr) {
jbe@107 772 moonbr_io_errmsg();
jbe@107 773 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 774 } else {
jbe@107 775 lua_pushstring(L, addrstr);
jbe@107 776 lua_setfield(L, -2, "local_ip4");
jbe@107 777 }
jbe@107 778 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 779 lua_setfield(L, -2, "local_tcpport");
jbe@107 780 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 781 moonbr_io_errmsg();
jbe@107 782 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 783 }
jbe@107 784 if (addrlen > sizeof(addr_in)) {
jbe@107 785 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 786 }
jbe@107 787 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 788 if (!addrstr) {
jbe@107 789 moonbr_io_errmsg();
jbe@107 790 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 791 } else {
jbe@107 792 lua_pushstring(L, addrstr);
jbe@107 793 lua_setfield(L, -2, "remote_ip4");
jbe@107 794 }
jbe@107 795 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 796 lua_setfield(L, -2, "remote_tcpport");
jbe@107 797 }
jbe@79 798 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 799 lua_setmetatable(L, -2);
jbe@79 800 lua_setfield(L, -2, "public");
jbe@79 801 lua_setuservalue(L, -2);
jbe@79 802 }
jbe@79 803
jbe@79 804 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 805 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 806 lua_getuservalue(L, 1);
jbe@79 807 lua_getfield(L, -1, "public");
jbe@79 808 lua_pushvalue(L, 2);
jbe@79 809 lua_gettable(L, -2);
jbe@79 810 return 1;
jbe@79 811 }
jbe@79 812
jbe@79 813 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 814 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 815 lua_getuservalue(L, 1);
jbe@79 816 lua_getfield(L, -1, "public");
jbe@79 817 lua_pushvalue(L, 2);
jbe@79 818 lua_pushvalue(L, 3);
jbe@79 819 lua_settable(L, -3);
jbe@79 820 return 0;
jbe@79 821 }
jbe@79 822
jbe@111 823 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 824 const char *path;
jbe@111 825 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 826 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 827 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 828 ) - 1; /* one byte for termination */
jbe@111 829 int sock;
jbe@111 830 path = luaL_checkstring(L, 1);
jbe@111 831 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 832 strcpy(sockaddr.sun_path, path);
jbe@111 833 sock = socket(
jbe@111 834 PF_LOCAL,
jbe@111 835 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 836 0
jbe@111 837 );
jbe@111 838 if (sock < 0) {
jbe@111 839 moonbr_io_errmsg();
jbe@111 840 lua_pushnil(L);
jbe@111 841 lua_pushstring(L, errmsg);
jbe@111 842 return 2;
jbe@111 843 }
jbe@111 844 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 845 if (!nonblocking && errno == EINTR) {
jbe@111 846 moonbr_io_errmsg();
jbe@111 847 close(sock);
jbe@111 848 lua_pushnil(L);
jbe@111 849 lua_pushstring(L, errmsg);
jbe@111 850 return 2;
jbe@111 851 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 852 moonbr_io_errmsg();
jbe@111 853 lua_pushnil(L);
jbe@111 854 lua_pushstring(L, errmsg);
jbe@111 855 return 2;
jbe@111 856 }
jbe@111 857 }
jbe@111 858 moonbr_io_pushhandle(L, sock);
jbe@111 859 return 1;
jbe@111 860 }
jbe@111 861
jbe@111 862 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 863 return moonbr_io_localconnect_impl(L, 0);
jbe@111 864 }
jbe@111 865
jbe@111 866 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 867 return moonbr_io_localconnect_impl(L, 1);
jbe@111 868 }
jbe@111 869
jbe@99 870 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 871 const char *host, *port;
jbe@98 872 struct addrinfo hints = { 0, };
jbe@98 873 struct addrinfo *res, *addrinfo;
jbe@98 874 int errcode;
jbe@98 875 int sock;
jbe@98 876 host = luaL_checkstring(L, 1);
jbe@98 877 port = luaL_checkstring(L, 2);
jbe@98 878 hints.ai_family = AF_UNSPEC;
jbe@98 879 hints.ai_socktype = SOCK_STREAM;
jbe@98 880 hints.ai_protocol = IPPROTO_TCP;
jbe@98 881 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 882 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 883 if (errcode) {
jbe@102 884 freeaddrinfo(res);
jbe@98 885 if (errcode == EAI_SYSTEM) {
jbe@98 886 moonbr_io_errmsg();
jbe@98 887 lua_pushnil(L);
jbe@98 888 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 889 } else {
jbe@98 890 lua_pushnil(L);
jbe@98 891 lua_pushstring(L, gai_strerror(errcode));
jbe@98 892 }
jbe@98 893 return 2;
jbe@98 894 }
jbe@98 895 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 896 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 897 }
jbe@98 898 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 899 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 900 }
jbe@98 901 addrinfo = res;
jbe@98 902 moonbr_io_tcpconnect_found:
jbe@99 903 sock = socket(
jbe@134 904 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 905 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 906 addrinfo->ai_protocol
jbe@99 907 );
jbe@98 908 if (sock < 0) {
jbe@98 909 moonbr_io_errmsg();
jbe@108 910 freeaddrinfo(res);
jbe@98 911 lua_pushnil(L);
jbe@98 912 lua_pushstring(L, errmsg);
jbe@108 913 return 2;
jbe@98 914 }
jbe@98 915 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 916 freeaddrinfo(res);
jbe@99 917 if (!nonblocking && errno == EINTR) {
jbe@99 918 moonbr_io_errmsg();
jbe@99 919 close(sock);
jbe@99 920 lua_pushnil(L);
jbe@99 921 lua_pushstring(L, errmsg);
jbe@99 922 return 2;
jbe@99 923 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 924 moonbr_io_errmsg();
jbe@99 925 lua_pushnil(L);
jbe@99 926 lua_pushstring(L, errmsg);
jbe@99 927 return 2;
jbe@99 928 }
jbe@108 929 } else {
jbe@108 930 freeaddrinfo(res);
jbe@98 931 }
jbe@107 932 moonbr_io_pushhandle(L, sock);
jbe@98 933 return 1;
jbe@98 934 }
jbe@98 935
jbe@99 936 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 937 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 938 }
jbe@99 939
jbe@99 940 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 941 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 942 }
jbe@99 943
jbe@112 944 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 945 moonbr_io_listener_t *listener;
jbe@112 946 const char *path;
jbe@118 947 struct stat sb;
jbe@112 948 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 949 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 950 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 951 ) - 1; /* one byte for termination */
jbe@112 952 int sock;
jbe@112 953 path = luaL_checkstring(L, 1);
jbe@112 954 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 955 strcpy(sockaddr.sun_path, path);
jbe@118 956 if (stat(path, &sb) == 0) {
jbe@118 957 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 958 }
jbe@112 959 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 960 listener->fd = -1;
jbe@112 961 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 962 sock = socket(
jbe@112 963 PF_LOCAL,
jbe@112 964 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 965 0
jbe@112 966 );
jbe@112 967 if (sock < 0) {
jbe@112 968 moonbr_io_errmsg();
jbe@112 969 lua_pushnil(L);
jbe@112 970 lua_pushstring(L, errmsg);
jbe@112 971 return 2;
jbe@112 972 }
jbe@112 973 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 974 moonbr_io_errmsg();
jbe@112 975 close(sock);
jbe@112 976 lua_pushnil(L);
jbe@112 977 lua_pushstring(L, errmsg);
jbe@112 978 return 2;
jbe@112 979 }
jbe@112 980 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 981 moonbr_io_errmsg();
jbe@112 982 close(sock);
jbe@112 983 lua_pushnil(L);
jbe@112 984 lua_pushstring(L, errmsg);
jbe@112 985 return 2;
jbe@112 986 }
jbe@112 987 listener->fd = sock;
jbe@118 988 listener->addrfam = AF_LOCAL;
jbe@112 989 listener->nonblocking = -1;
jbe@112 990 return 1;
jbe@112 991 }
jbe@112 992
jbe@108 993 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 994 moonbr_io_listener_t *listener;
jbe@108 995 const char *host, *port;
jbe@108 996 struct addrinfo hints = { 0, };
jbe@108 997 struct addrinfo *res, *addrinfo;
jbe@108 998 int errcode;
jbe@108 999 int sock;
jbe@108 1000 host = luaL_optstring(L, 1, NULL);
jbe@108 1001 port = luaL_checkstring(L, 2);
jbe@108 1002 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1003 listener->fd = -1;
jbe@108 1004 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1005 hints.ai_family = AF_UNSPEC;
jbe@108 1006 hints.ai_socktype = SOCK_STREAM;
jbe@108 1007 hints.ai_protocol = IPPROTO_TCP;
jbe@108 1008 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 1009 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 1010 if (errcode) {
jbe@108 1011 freeaddrinfo(res);
jbe@108 1012 if (errcode == EAI_SYSTEM) {
jbe@108 1013 moonbr_io_errmsg();
jbe@108 1014 lua_pushnil(L);
jbe@108 1015 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 1016 } else {
jbe@108 1017 lua_pushnil(L);
jbe@108 1018 lua_pushstring(L, gai_strerror(errcode));
jbe@108 1019 }
jbe@108 1020 return 2;
jbe@108 1021 }
jbe@108 1022 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1023 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 1024 }
jbe@108 1025 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1026 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 1027 }
jbe@108 1028 addrinfo = res;
jbe@108 1029 moonbr_io_tcpconnect_found:
jbe@118 1030 listener->addrfam = addrinfo->ai_family;
jbe@108 1031 sock = socket(
jbe@134 1032 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 1033 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 1034 addrinfo->ai_protocol
jbe@108 1035 );
jbe@108 1036 if (sock < 0) {
jbe@108 1037 moonbr_io_errmsg();
jbe@108 1038 freeaddrinfo(res);
jbe@108 1039 lua_pushnil(L);
jbe@108 1040 lua_pushstring(L, errmsg);
jbe@108 1041 return 2;
jbe@108 1042 }
jbe@120 1043 {
jbe@120 1044 static const int reuseval = 1;
jbe@120 1045 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 1046 moonbr_io_errmsg();
jbe@120 1047 freeaddrinfo(res);
jbe@120 1048 close(sock);
jbe@120 1049 lua_pushnil(L);
jbe@120 1050 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 1051 return 2;
jbe@120 1052 }
jbe@120 1053 }
jbe@108 1054 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1055 moonbr_io_errmsg();
jbe@108 1056 freeaddrinfo(res);
jbe@108 1057 close(sock);
jbe@108 1058 lua_pushnil(L);
jbe@108 1059 lua_pushstring(L, errmsg);
jbe@108 1060 return 2;
jbe@108 1061 }
jbe@108 1062 freeaddrinfo(res);
jbe@108 1063 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1064 moonbr_io_errmsg();
jbe@108 1065 close(sock);
jbe@108 1066 lua_pushnil(L);
jbe@108 1067 lua_pushstring(L, errmsg);
jbe@108 1068 return 2;
jbe@108 1069 }
jbe@108 1070 listener->fd = sock;
jbe@108 1071 listener->nonblocking = -1;
jbe@108 1072 return 1;
jbe@108 1073 }
jbe@108 1074
jbe@108 1075 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1076 moonbr_io_listener_t *listener;
jbe@108 1077 int fd;
jbe@108 1078 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1079 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1080 if (listener->nonblocking != nonblocking) {
jbe@108 1081 int flags;
jbe@108 1082 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1083 if (flags == -1) {
jbe@108 1084 moonbr_io_errmsg();
jbe@108 1085 close(listener->fd);
jbe@108 1086 listener->fd = -1;
jbe@108 1087 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1088 }
jbe@108 1089 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1090 else flags &= ~O_NONBLOCK;
jbe@108 1091 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1092 moonbr_io_errmsg();
jbe@108 1093 close(listener->fd);
jbe@108 1094 listener->fd = -1;
jbe@108 1095 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1096 }
jbe@108 1097 listener->nonblocking = nonblocking;
jbe@108 1098 }
jbe@108 1099 while (1) {
jbe@108 1100 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1101 if (fd < 0) {
jbe@108 1102 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1103 lua_pushboolean(L, 0);
jbe@108 1104 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1105 return 2;
jbe@108 1106 } else if (errno != EINTR) {
jbe@108 1107 moonbr_io_errmsg();
jbe@108 1108 lua_pushnil(L);
jbe@108 1109 lua_pushstring(L, errmsg);
jbe@108 1110 return 2;
jbe@108 1111 }
jbe@108 1112 } else {
jbe@108 1113 moonbr_io_pushhandle(L, fd);
jbe@108 1114 return 1;
jbe@108 1115 }
jbe@108 1116 }
jbe@108 1117 }
jbe@108 1118
jbe@108 1119 static int moonbr_io_accept(lua_State *L) {
jbe@108 1120 return moonbr_io_accept_impl(L, 0);
jbe@108 1121 }
jbe@108 1122
jbe@108 1123 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1124 return moonbr_io_accept_impl(L, 1);
jbe@108 1125 }
jbe@108 1126
jbe@108 1127 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1128 moonbr_io_listener_t *listener;
jbe@118 1129 struct sockaddr_un addr;
jbe@118 1130 socklen_t addrlen;
jbe@118 1131 struct stat sb;
jbe@108 1132 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1133 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1134 addrlen = sizeof(addr);
jbe@118 1135 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1136 if (close(listener->fd)) {
jbe@108 1137 moonbr_io_errmsg();
jbe@108 1138 listener->fd = -1;
jbe@118 1139 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1140 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1141 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1142 }
jbe@118 1143 }
jbe@108 1144 lua_pushnil(L);
jbe@108 1145 lua_pushstring(L, errmsg);
jbe@108 1146 return 2;
jbe@108 1147 }
jbe@108 1148 listener->fd = -1;
jbe@118 1149 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1150 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1151 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1152 }
jbe@118 1153 }
jbe@108 1154 lua_pushboolean(L, 1);
jbe@108 1155 return 1;
jbe@108 1156 }
jbe@108 1157
jbe@108 1158 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1159 moonbr_io_listener_t *listener;
jbe@108 1160 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1161 if (listener->fd >= 0) close(listener->fd);
jbe@108 1162 listener->fd = -1;
jbe@108 1163 return 0;
jbe@108 1164 }
jbe@108 1165
jbe@106 1166 static int moonbr_io_poll(lua_State *L) {
jbe@106 1167 moonbr_io_handle_t *handle;
jbe@108 1168 moonbr_io_listener_t *listener;
jbe@106 1169 int fd, isnum;
jbe@106 1170 int nfds = 0;
jbe@106 1171 fd_set readfds, writefds, exceptfds;
jbe@106 1172 struct timeval timeout = {0, };
jbe@106 1173 int status;
jbe@106 1174 FD_ZERO(&readfds);
jbe@106 1175 FD_ZERO(&writefds);
jbe@106 1176 FD_ZERO(&exceptfds);
jbe@106 1177 if (!lua_isnoneornil(L, 1)) {
jbe@106 1178 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1179 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1180 if (lua_toboolean(L, -1)) {
jbe@106 1181 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1182 if (handle) {
jbe@109 1183 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1184 fd = handle->fd;
jbe@122 1185 if (
jbe@122 1186 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1187 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1188 ) {
jbe@109 1189 lua_pushboolean(L, 1);
jbe@109 1190 return 1;
jbe@109 1191 }
jbe@106 1192 } else {
jbe@108 1193 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1194 if (listener) {
jbe@108 1195 fd = listener->fd;
jbe@108 1196 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1197 } else {
jbe@108 1198 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1199 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1200 }
jbe@106 1201 }
jbe@138 1202 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1203 FD_SET(fd, &readfds);
jbe@106 1204 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1205 }
jbe@106 1206 }
jbe@106 1207 }
jbe@106 1208 if (!lua_isnoneornil(L, 2)) {
jbe@106 1209 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1210 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1211 if (lua_toboolean(L, -1)) {
jbe@106 1212 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1213 if (handle) {
jbe@109 1214 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1215 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1216 fd = handle->fd;
jbe@106 1217 } else {
jbe@108 1218 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1219 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1220 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1221 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1222 }
jbe@138 1223 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1224 FD_SET(fd, &writefds);
jbe@106 1225 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1226 }
jbe@106 1227 }
jbe@106 1228 }
jbe@106 1229 if (!lua_isnoneornil(L, 3)) {
jbe@106 1230 lua_Number n;
jbe@106 1231 n = lua_tonumberx(L, 3, &isnum);
jbe@106 1232 if (isnum && n>=0 && n<100000000) {
jbe@106 1233 timeout.tv_sec = n;
jbe@106 1234 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1235 } else {
jbe@106 1236 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1237 }
jbe@106 1238 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1239 } else {
jbe@106 1240 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1241 }
jbe@106 1242 if (status == -1) {
jbe@106 1243 if (errno == EINTR) {
jbe@106 1244 lua_pushboolean(L, 0);
jbe@106 1245 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1246 return 2;
jbe@106 1247 } else {
jbe@106 1248 moonbr_io_errmsg();
jbe@106 1249 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1250 }
jbe@106 1251 } else if (status == 0) {
jbe@106 1252 lua_pushboolean(L, 0);
jbe@106 1253 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1254 return 2;
jbe@106 1255 } else {
jbe@106 1256 lua_pushboolean(L, 1);
jbe@106 1257 return 1;
jbe@106 1258 }
jbe@106 1259 }
jbe@106 1260
jbe@115 1261 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1262 lua_Number sub;
jbe@115 1263 struct timespec tp;
jbe@115 1264 sub = luaL_optnumber(L, 1, 0);
jbe@115 1265 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1266 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1267 }
jbe@115 1268 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1269 return 1;
jbe@115 1270 }
jbe@115 1271
jbe@79 1272 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1273 {"read", moonbr_io_read},
jbe@85 1274 {"read_nb", moonbr_io_read_nb},
jbe@140 1275 {"read_call", moonbr_io_read_call},
jbe@140 1276 {"read_yield", moonbr_io_read_yield},
jbe@86 1277 {"drain", moonbr_io_drain},
jbe@86 1278 {"drain_nb", moonbr_io_drain_nb},
jbe@144 1279 {"drain_call", moonbr_io_drain_call},
jbe@144 1280 {"drain_yield", moonbr_io_drain_yield},
jbe@80 1281 {"write", moonbr_io_write},
jbe@81 1282 {"write_nb", moonbr_io_write_nb},
jbe@80 1283 {"flush", moonbr_io_flush},
jbe@81 1284 {"flush_nb", moonbr_io_flush_nb},
jbe@88 1285 {"finish", moonbr_io_finish},
jbe@87 1286 {"close", moonbr_io_close},
jbe@85 1287 {"reset", moonbr_io_reset},
jbe@79 1288 {NULL, NULL}
jbe@79 1289 };
jbe@79 1290
jbe@79 1291 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1292 {"__index", moonbr_io_handleindex},
jbe@79 1293 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1294 {"__gc", moonbr_io_handlegc},
jbe@108 1295 {NULL, NULL}
jbe@108 1296 };
jbe@108 1297
jbe@108 1298 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1299 {"accept", moonbr_io_accept},
jbe@108 1300 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1301 {"close", moonbr_io_unlisten},
jbe@108 1302 {NULL, NULL}
jbe@108 1303 };
jbe@108 1304
jbe@108 1305 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1306 {"__gc", moonbr_io_listenergc},
jbe@79 1307 {NULL, NULL}
jbe@79 1308 };
jbe@79 1309
jbe@79 1310 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1311 {"localconnect", moonbr_io_localconnect},
jbe@111 1312 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1313 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1314 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1315 {"locallisten", moonbr_io_locallisten},
jbe@108 1316 {"tcplisten", moonbr_io_tcplisten},
jbe@106 1317 {"poll", moonbr_io_poll},
jbe@115 1318 {"timeref", moonbr_io_timeref},
jbe@79 1319 {NULL, NULL}
jbe@79 1320 };
jbe@79 1321
jbe@79 1322 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1323
jbe@113 1324 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1325
jbe@80 1326 lua_newtable(L); // module
jbe@80 1327
jbe@79 1328 lua_newtable(L); // public metatable
jbe@79 1329 lua_newtable(L); // handle methods
jbe@79 1330 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1331 lua_pushvalue(L, -1);
jbe@108 1332 lua_setfield(L, -4, "prototype_handle");
jbe@79 1333 lua_setfield(L, -2, "__index");
jbe@79 1334 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1335
jbe@79 1336 lua_newtable(L); // handle metatable
jbe@79 1337 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 1338 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1339
jbe@108 1340 lua_newtable(L); // listener metatable
jbe@108 1341 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1342 lua_newtable(L); // listener methods
jbe@108 1343 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1344 lua_pushvalue(L, -1);
jbe@108 1345 lua_setfield(L, -4, "prototype_listener");
jbe@108 1346 lua_setfield(L, -2, "__index");
jbe@108 1347 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1348
jbe@79 1349 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1350 return 1;
jbe@79 1351
jbe@79 1352 }
jbe@79 1353

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