moonbridge: moonbridge

moonbridge

annotate moonbridge_io.c @ 278:d4c82c90d244

Make moonbridge_io.signalsocket(...) return a new socket each time it is called

author	jbe
date	Tue Jun 06 20:01:29 2017 +0200 (2017-06-06)
parents	8b8be1a66a98
children	1a4f89f4c712

rev	line source
jbe@209	1
jbe@209	2 #ifndef __has_include
jbe@209	3 #define __has_include(x) 0
jbe@209	4 #endif
jbe@79	5
jbe@79	6 #include <stdlib.h>
jbe@135	7 #include <stdint.h>
jbe@135	8 #include <string.h>
jbe@135	9 #include <errno.h>
jbe@79	10 #include <unistd.h>
jbe@135	11 #include <signal.h>
jbe@135	12 #include <fcntl.h>
jbe@135	13 #include <sys/stat.h>
jbe@79	14 #include <sys/socket.h>
jbe@111	15 #include <sys/un.h>
jbe@95	16 #include <netinet/in.h>
jbe@95	17 #include <netinet/tcp.h>
jbe@135	18 #include <sys/select.h>
jbe@136	19 #include <time.h>
jbe@135	20 #include <netdb.h>
jbe@107	21 #include <arpa/inet.h>
jbe@205	22 #include <sys/types.h>
jbe@205	23 #include <sys/wait.h>
jbe@209	24 #if defined(__linux__) \|\| __has_include(<bsd/unistd.h>)
jbe@209	25 #include <bsd/unistd.h>
jbe@209	26 #endif
jbe@211	27
jbe@243	28 #ifdef MOONBR_IO_USE_TLS
jbe@243	29 #include <tls.h>
jbe@243	30 #endif
jbe@243	31
jbe@79	32 #include <lua.h>
jbe@79	33 #include <lauxlib.h>
jbe@79	34 #include <lualib.h>
jbe@79	35
jbe@149	36 #include <assert.h>
jbe@149	37
jbe@80	38 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85	39 #define MOONBR_IO_READBUFLEN 4096
jbe@80	40 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80	41
jbe@108	42 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108	43
jbe@213	44 #define MOONBR_IO_STRERROR_R_MSG "Error detail unavailable due to noncompliant strerror_r() implementation"
jbe@257	45 #define moonbr_io_prepare_errmsg() \
jbe@213	46 char errmsg[MOONBR_IO_MAXSTRERRORLEN] = MOONBR_IO_STRERROR_R_MSG; \
jbe@80	47 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@257	48 #define moonbr_io_return_prepared_errmsg() \
jbe@257	49 lua_pushnil(L); \
jbe@257	50 lua_pushstring(L, errmsg); \
jbe@257	51 return 2
jbe@257	52 #define moonbr_io_return_errmsg() \
jbe@257	53 do { \
jbe@257	54 moonbr_io_prepare_errmsg(); \
jbe@257	55 moonbr_io_return_prepared_errmsg(); \
jbe@257	56 } while (0)
jbe@80	57
jbe@278	58 #define MOONBR_IO_MAXSIGNUM 127
jbe@278	59 static int moonbr_io_signalfds[2*(MOONBR_IO_MAXSIGNUM+1)];
jbe@278	60 #define moonbr_io_signalfd_read(x) moonbr_io_signalfds[2*(x)+0]
jbe@278	61 #define moonbr_io_signalfd_write(x) moonbr_io_signalfds[2*(x)+1]
jbe@266	62
jbe@79	63 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79	64 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108	65 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@205	66 #define MOONBR_IO_CHILD_MT_REGKEY "moonbridge_io_child"
jbe@205	67 #define MOONBR_IO_CHILD_PT_REGKEY "moonbridge_io_child_pt"
jbe@271	68 #define MOONBR_IO_SIGNALS_REGKEY "moonbridge_io_signals"
jbe@79	69
jbe@243	70 #ifdef MOONBR_IO_USE_TLS
jbe@258	71
jbe@243	72 #define MOONBR_IO_TLSCONF_MT_REGKEY "moonbridge_io_tlsconf"
jbe@252	73
jbe@252	74 typedef struct {
jbe@252	75 struct tls_config *config;
jbe@252	76 int server;
jbe@252	77 } moonbr_io_tlsconf_t;
jbe@258	78
jbe@258	79 #endif /* MOONBR_IO_USE_TLS */
jbe@243	80
jbe@79	81 typedef struct {
jbe@79	82 int fd;
jbe@107	83 int issock;
jbe@107	84 sa_family_t addrfam;
jbe@94	85 int finished;
jbe@94	86 int closed;
jbe@81	87 int nonblocking;
jbe@95	88 int nopush;
jbe@85	89 int readerr;
jbe@105	90 int readbufin;
jbe@105	91 int readbufout;
jbe@81	92 int writeerr;
jbe@83	93 size_t writeleft;
jbe@132	94 size_t flushedleft;
jbe@83	95 #if LUA_VERSION_NUM >= 503
jbe@83	96 lua_Integer writeqin;
jbe@83	97 lua_Integer writeqout;
jbe@83	98 #else
jbe@83	99 int writeqin;
jbe@83	100 int writeqout;
jbe@83	101 #endif
jbe@83	102 size_t writeqoff;
jbe@103	103 int writebufin;
jbe@103	104 int writebufout;
jbe@85	105 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80	106 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@246	107 #ifdef MOONBR_IO_USE_TLS
jbe@250	108 struct tls *tls;
jbe@250	109 struct tls *servertls;
jbe@250	110 int tlshandshake;
jbe@261	111 int tlsclosing;
jbe@246	112 #endif
jbe@79	113 } moonbr_io_handle_t;
jbe@79	114
jbe@108	115 typedef struct {
jbe@108	116 int fd;
jbe@118	117 sa_family_t addrfam;
jbe@108	118 int nonblocking;
jbe@108	119 } moonbr_io_listener_t;
jbe@108	120
jbe@205	121 typedef struct {
jbe@205	122 pid_t pid;
jbe@205	123 } moonbr_io_child_t;
jbe@205	124
jbe@148	125 static int moonbr_io_yield(lua_State *L) {
jbe@149	126 return lua_yield(L, lua_gettop(L));
jbe@140	127 }
jbe@140	128
jbe@140	129 #if LUA_VERSION_NUM >= 503
jbe@140	130 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140	131 #else
jbe@140	132 static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140	133 #endif
jbe@140	134 return lua_gettop(L);
jbe@140	135 }
jbe@140	136
jbe@145	137 #define moonbr_io_yield_wrapper(yieldfunc, callfunc) \
jbe@145	138 static int yieldfunc(lua_State *L) { \
jbe@145	139 int args; \
jbe@145	140 lua_pushcfunction(L, callfunc); \
jbe@145	141 lua_insert(L, 1); \
jbe@145	142 args = lua_gettop(L); \
jbe@148	143 lua_pushcfunction(L, moonbr_io_yield); \
jbe@145	144 lua_insert(L, 3); \
jbe@145	145 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall); \
jbe@145	146 return lua_gettop(L); \
jbe@145	147 }
jbe@145	148
jbe@256	149 static int moonbr_io_handle_set_nonblocking(lua_State L, moonbr_io_handle_t handle, int nonblocking) {
jbe@95	150 int flags;
jbe@256	151 if (handle->nonblocking == nonblocking) return 0;
jbe@95	152 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@256	153 if (flags == -1) return -1;
jbe@95	154 if (nonblocking) flags \|= O_NONBLOCK;
jbe@95	155 else flags &= ~O_NONBLOCK;
jbe@256	156 if (fcntl(handle->fd, F_SETFL, flags) == -1) return -1;
jbe@95	157 handle->nonblocking = nonblocking;
jbe@256	158 return 0;
jbe@81	159 }
jbe@81	160
jbe@256	161 static int moonbr_io_handle_set_linger(lua_State L, moonbr_io_handle_t handle, int timeout) {
jbe@87	162 struct linger lingerval = { 0, };
jbe@256	163 if (!handle->issock) return 0;
jbe@87	164 if (timeout >= 0) {
jbe@87	165 lingerval.l_onoff = 1;
jbe@87	166 lingerval.l_linger = timeout;
jbe@87	167 }
jbe@256	168 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) return -1;
jbe@256	169 return 0;
jbe@87	170 }
jbe@87	171
jbe@256	172 static inline int moonbr_io_handle_set_nopush(lua_State L, moonbr_io_handle_t handle, int nopush) {
jbe@96	173 #if defined(TCP_NOPUSH) \|\| defined(TCP_CORK)
jbe@107	174 if (
jbe@107	175 !(handle->addrfam == AF_INET6 \|\| handle->addrfam == AF_INET) \|\|
jbe@107	176 handle->nopush == nopush
jbe@256	177 ) return 0;
jbe@96	178 #if defined(TCP_NOPUSH)
jbe@256	179 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) return -1;
jbe@104	180 #elif defined(TCP_CORK)
jbe@256	181 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) return -1;
jbe@251	182 #endif
jbe@95	183 handle->nopush = nopush;
jbe@96	184 #else
jbe@96	185 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96	186 #endif
jbe@256	187 return 0;
jbe@95	188 }
jbe@95	189
jbe@86	190 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85	191 moonbr_io_handle_t *handle;
jbe@85	192 lua_Integer maxread;
jbe@85	193 const char *terminatorstr;
jbe@210	194 size_t terminatorlen;
jbe@210	195 char terminator = 0; /* initialize to avoid compiler warning */
jbe@85	196 luaL_Buffer luabuf;
jbe@85	197 size_t luabufcnt = 0;
jbe@105	198 int remaining;
jbe@85	199 char *terminatorpos;
jbe@103	200 ssize_t bytesread;
jbe@85	201 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@153	202 maxread = luaL_optinteger(L, 2, -1);
jbe@85	203 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85	204 if (terminatorlen) {
jbe@85	205 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85	206 terminator = terminatorstr[0];
jbe@85	207 }
jbe@86	208 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94	209 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85	210 if (handle->readerr) {
jbe@85	211 lua_pushnil(L);
jbe@85	212 lua_pushliteral(L, "Previous read error");
jbe@85	213 return 2;
jbe@85	214 }
jbe@143	215 if (handle->fd < 0) {
jbe@143	216 /* fake EOF to simulate shutdown */
jbe@143	217 if (!drain) lua_pushliteral(L, "");
jbe@143	218 else lua_pushinteger(L, 0);
jbe@143	219 lua_pushliteral(L, "eof");
jbe@143	220 return 2;
jbe@143	221 }
jbe@105	222 handle->readerr = 1;
jbe@257	223 if (moonbr_io_handle_set_nonblocking(L, handle, nonblocking)) moonbr_io_return_errmsg();
jbe@86	224 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85	225 while (1) {
jbe@105	226 remaining = -1;
jbe@142	227 terminatorpos = NULL;
jbe@105	228 if (
jbe@153	229 maxread >= 0 &&
jbe@143	230 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105	231 ) {
jbe@142	232 remaining = (size_t)maxread - luabufcnt;
jbe@193	233 if (terminatorlen) {
jbe@193	234 terminatorpos = memchr(
jbe@193	235 handle->readbuf + handle->readbufout,
jbe@193	236 terminator,
jbe@193	237 remaining
jbe@193	238 );
jbe@193	239 }
jbe@85	240 } else if (terminatorlen) {
jbe@105	241 terminatorpos = memchr(
jbe@105	242 handle->readbuf + handle->readbufout,
jbe@105	243 terminator,
jbe@105	244 handle->readbufin - handle->readbufout
jbe@105	245 );
jbe@85	246 }
jbe@142	247 if (terminatorpos) remaining = 1 + (
jbe@142	248 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142	249 );
jbe@105	250 if (remaining >= 0) {
jbe@86	251 if (!drain) {
jbe@105	252 luaL_addlstring(
jbe@105	253 &luabuf,
jbe@105	254 handle->readbuf + handle->readbufout,
jbe@105	255 remaining
jbe@105	256 );
jbe@86	257 luaL_pushresult(&luabuf);
jbe@90	258 } else {
jbe@105	259 lua_pushinteger(L, luabufcnt + remaining);
jbe@86	260 }
jbe@143	261 if (terminatorpos) lua_pushliteral(L, "term");
jbe@143	262 else lua_pushliteral(L, "maxlen");
jbe@105	263 handle->readbufout += remaining;
jbe@105	264 if (handle->readbufout == handle->readbufin) {
jbe@105	265 handle->readbufin = 0;
jbe@143	266 handle->readbufout = 0;
jbe@105	267 }
jbe@104	268 handle->readerr = 0;
jbe@143	269 return 2;
jbe@85	270 }
jbe@105	271 if (!drain) luaL_addlstring(
jbe@105	272 &luabuf,
jbe@105	273 handle->readbuf + handle->readbufout,
jbe@105	274 handle->readbufin - handle->readbufout
jbe@105	275 );
jbe@105	276 luabufcnt += handle->readbufin - handle->readbufout;
jbe@143	277 handle->readbufout = 0;
jbe@249	278 #ifdef MOONBR_IO_USE_TLS
jbe@249	279 if (handle->tls) {
jbe@250	280 do {
jbe@250	281 if (!handle->tlshandshake) {
jbe@250	282 do bytesread = tls_handshake(handle->tls);
jbe@250	283 while (!nonblocking && (bytesread == TLS_WANT_POLLIN \|\| bytesread == TLS_WANT_POLLOUT));
jbe@250	284 if (bytesread == TLS_WANT_POLLIN \|\| bytesread == TLS_WANT_POLLOUT) {
jbe@250	285 handle->tlshandshake = bytesread;
jbe@250	286 errno = EAGAIN;
jbe@250	287 break;
jbe@250	288 }
jbe@250	289 if (bytesread < 0) {
jbe@250	290 lua_pushnil(L);
jbe@250	291 lua_pushstring(L, tls_error(handle->tls));
jbe@250	292 return 2;
jbe@250	293 }
jbe@250	294 handle->tlshandshake = 1;
jbe@250	295 }
jbe@250	296 do bytesread = tls_read(handle->tls, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@250	297 while (!nonblocking && (bytesread == TLS_WANT_POLLIN \|\| bytesread == TLS_WANT_POLLOUT));
jbe@250	298 if (bytesread == TLS_WANT_POLLIN \|\| bytesread == TLS_WANT_POLLOUT) {
jbe@250	299 errno = EAGAIN;
jbe@250	300 break;
jbe@250	301 }
jbe@250	302 if (bytesread < 0) {
jbe@250	303 lua_pushnil(L);
jbe@250	304 lua_pushstring(L, tls_error(handle->tls));
jbe@250	305 return 2;
jbe@250	306 }
jbe@250	307 } while (0);
jbe@249	308 }
jbe@249	309 else
jbe@249	310 #endif
jbe@249	311 do bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@249	312 while (bytesread < 0 && (errno == EINTR));
jbe@105	313 if (
jbe@105	314 bytesread == 0 \|\| (
jbe@105	315 nonblocking &&
jbe@105	316 bytesread < 0 && (errno == EAGAIN \|\| errno == EWOULDBLOCK)
jbe@105	317 )
jbe@105	318 ) {
jbe@105	319 handle->readbufin = 0;
jbe@143	320 if (!drain) luaL_pushresult(&luabuf);
jbe@143	321 else lua_pushinteger(L, luabufcnt);
jbe@143	322 if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143	323 else lua_pushliteral(L, "block");
jbe@105	324 handle->readerr = 0;
jbe@143	325 return 2;
jbe@105	326 }
jbe@257	327 if (bytesread < 0) moonbr_io_return_errmsg();
jbe@105	328 handle->readbufin = bytesread;
jbe@86	329 }
jbe@85	330 }
jbe@85	331
jbe@85	332 static int moonbr_io_read(lua_State *L) {
jbe@86	333 return moonbr_io_read_impl(L, 0, 0);
jbe@85	334 }
jbe@85	335
jbe@85	336 static int moonbr_io_read_nb(lua_State *L) {
jbe@86	337 return moonbr_io_read_impl(L, 1, 0);
jbe@86	338 }
jbe@86	339
jbe@86	340 static int moonbr_io_drain(lua_State *L) {
jbe@86	341 return moonbr_io_read_impl(L, 0, 1);
jbe@86	342 }
jbe@86	343
jbe@86	344 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86	345 return moonbr_io_read_impl(L, 1, 1);
jbe@85	346 }
jbe@85	347
jbe@140	348 #if LUA_VERSION_NUM >= 503
jbe@140	349 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140	350 #else
jbe@140	351 static int moonbr_io_read_cont(lua_State *L) {
jbe@140	352 #endif
jbe@143	353 lua_Integer remaining;
jbe@143	354 size_t len;
jbe@140	355 #if !(LUA_VERSION_NUM >= 503)
jbe@140	356 int ctx = 0;
jbe@140	357 lua_getctx(L, &ctx);
jbe@140	358 #endif
jbe@140	359 remaining = lua_tointeger(L, 3);
jbe@140	360 while (1) {
jbe@140	361 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140	362 lua_pushvalue(L, 1);
jbe@140	363 lua_pushvalue(L, 3);
jbe@140	364 lua_pushvalue(L, 4);
jbe@140	365 lua_call(L, 3, 2);
jbe@143	366 if (lua_isnil(L, -2)) return 2;
jbe@143	367 lua_insert(L, -2);
jbe@143	368 len = lua_rawlen(L, -1);
jbe@143	369 if (ctx == 0) {
jbe@143	370 lua_replace(L, 5);
jbe@143	371 ctx = 1;
jbe@143	372 } else if (ctx == 1) {
jbe@143	373 lua_pushvalue(L, 5);
jbe@143	374 lua_newtable(L);
jbe@143	375 lua_replace(L, 5);
jbe@143	376 lua_rawseti(L, 5, 2);
jbe@143	377 lua_rawseti(L, 5, 1);
jbe@143	378 ctx = 2;
jbe@140	379 } else {
jbe@143	380 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140	381 }
jbe@144	382 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144	383 lua_pop(L, 1);
jbe@144	384 if (remaining >= 0 && len) {
jbe@143	385 remaining -= len;
jbe@143	386 lua_pushinteger(L, remaining);
jbe@143	387 lua_replace(L, 3);
jbe@143	388 }
jbe@140	389 lua_pushvalue(L, 2);
jbe@152	390 lua_callk(L, 0, 0, ctx, moonbr_io_read_cont);
jbe@140	391 }
jbe@140	392 if (ctx == 1) {
jbe@140	393 lua_pushvalue(L, 5);
jbe@140	394 } else {
jbe@140	395 luaL_Buffer buf;
jbe@140	396 lua_Integer i, chunkcount;
jbe@140	397 chunkcount = lua_rawlen(L, 5);
jbe@140	398 luaL_buffinit(L, &buf);
jbe@140	399 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140	400 lua_rawgeti(L, 5, i);
jbe@140	401 luaL_addvalue(&buf);
jbe@140	402 }
jbe@140	403 luaL_pushresult(&buf);
jbe@140	404 }
jbe@143	405 lua_pushvalue(L, -2);
jbe@143	406 return 2;
jbe@140	407 }
jbe@140	408
jbe@140	409 static int moonbr_io_read_call(lua_State *L) {
jbe@140	410 lua_settop(L, 4);
jbe@140	411 lua_pushnil(L);
jbe@140	412 #if LUA_VERSION_NUM >= 503
jbe@140	413 return moonbr_io_read_cont(L, 0, 0);
jbe@140	414 #else
jbe@140	415 return moonbr_io_read_cont(L);
jbe@140	416 #endif
jbe@140	417 }
jbe@140	418
jbe@145	419 moonbr_io_yield_wrapper(moonbr_io_read_yield, moonbr_io_read_call);
jbe@140	420
jbe@144	421 #if LUA_VERSION_NUM >= 503
jbe@144	422 static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@144	423 #else
jbe@144	424 static int moonbr_io_drain_cont(lua_State *L) {
jbe@144	425 #endif
jbe@144	426 lua_Integer remaining, len;
jbe@144	427 size_t totallen = 0;
jbe@144	428 #if !(LUA_VERSION_NUM >= 503)
jbe@144	429 int ctx = 0;
jbe@144	430 lua_getctx(L, &ctx);
jbe@144	431 #endif
jbe@144	432 remaining = lua_tointeger(L, 3);
jbe@144	433 while (1) {
jbe@144	434 lua_pushcfunction(L, moonbr_io_drain_nb);
jbe@144	435 lua_pushvalue(L, 1);
jbe@144	436 lua_pushvalue(L, 3);
jbe@144	437 lua_pushvalue(L, 4);
jbe@144	438 lua_call(L, 3, 2);
jbe@144	439 if (lua_isnil(L, -2)) return 2;
jbe@144	440 lua_insert(L, -2);
jbe@144	441 len = lua_tointeger(L, -1);
jbe@144	442 lua_pop(L, 1);
jbe@144	443 totallen += len;
jbe@144	444 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144	445 lua_pop(L, 1);
jbe@144	446 if (remaining >= 0 && len) {
jbe@144	447 remaining -= len;
jbe@144	448 lua_pushinteger(L, remaining);
jbe@144	449 lua_replace(L, 3);
jbe@144	450 }
jbe@144	451 lua_pushvalue(L, 2);
jbe@152	452 lua_callk(L, 0, 0, ctx, moonbr_io_drain_cont);
jbe@144	453 }
jbe@144	454 lua_pushinteger(L, totallen);
jbe@144	455 lua_pushvalue(L, -2);
jbe@144	456 return 2;
jbe@144	457 }
jbe@144	458
jbe@144	459 static int moonbr_io_drain_call(lua_State *L) {
jbe@144	460 #if LUA_VERSION_NUM >= 503
jbe@144	461 return moonbr_io_drain_cont(L, 0, 0);
jbe@144	462 #else
jbe@144	463 return moonbr_io_drain_cont(L);
jbe@144	464 #endif
jbe@144	465 }
jbe@144	466
jbe@145	467 moonbr_io_yield_wrapper(moonbr_io_drain_yield, moonbr_io_drain_call);
jbe@144	468
jbe@250	469 #ifdef MOONBR_IO_USE_TLS
jbe@258	470
jbe@250	471 #define moonbr_io_write_tls(buf, buflen) \
jbe@250	472 if (handle->tls) { \
jbe@250	473 do { \
jbe@250	474 if (!handle->tlshandshake) { \
jbe@250	475 do written = tls_handshake(handle->tls); \
jbe@250	476 while (!nonblocking && (written == TLS_WANT_POLLIN \|\| written == TLS_WANT_POLLOUT)); \
jbe@250	477 if (written == TLS_WANT_POLLIN \|\| written == TLS_WANT_POLLOUT) { \
jbe@250	478 handle->tlshandshake = written; \
jbe@250	479 errno = EAGAIN; \
jbe@250	480 break; \
jbe@250	481 } \
jbe@250	482 if (written < 0) { \
jbe@250	483 lua_pushnil(L); \
jbe@250	484 lua_pushstring(L, tls_error(handle->tls)); \
jbe@250	485 return 2; \
jbe@250	486 } \
jbe@250	487 handle->tlshandshake = 1; \
jbe@250	488 } \
jbe@250	489 do written = tls_write(handle->tls, (buf), (buflen)); \
jbe@250	490 while (!nonblocking && (written == TLS_WANT_POLLIN \|\| written == TLS_WANT_POLLOUT)); \
jbe@250	491 if (written == TLS_WANT_POLLIN \|\| written == TLS_WANT_POLLOUT) { \
jbe@250	492 errno = EAGAIN; \
jbe@250	493 break; \
jbe@250	494 } \
jbe@250	495 if (written < 0) { \
jbe@250	496 lua_pushnil(L); \
jbe@250	497 lua_pushstring(L, tls_error(handle->tls)); \
jbe@250	498 return 2; \
jbe@250	499 } \
jbe@250	500 } while (0); \
jbe@250	501 } \
jbe@250	502 else
jbe@258	503
jbe@258	504 #endif /* MOONBR_IO_USE_TLS */
jbe@250	505
jbe@81	506 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80	507 moonbr_io_handle_t *handle;
jbe@80	508 int i, top;
jbe@80	509 const char *str;
jbe@92	510 size_t strlen;
jbe@103	511 ssize_t written;
jbe@80	512 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94	513 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94	514 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81	515 if (handle->writeerr) {
jbe@80	516 lua_pushnil(L);
jbe@80	517 lua_pushliteral(L, "Previous write error");
jbe@80	518 return 2;
jbe@80	519 }
jbe@103	520 handle->writeerr = 1;
jbe@257	521 if (moonbr_io_handle_set_nonblocking(L, handle, nonblocking)) moonbr_io_return_errmsg();
jbe@84	522 top = lua_gettop(L);
jbe@81	523 lua_getuservalue(L, 1);
jbe@103	524 lua_getfield(L, -1, "writequeue");
jbe@84	525 for (i=2; i<=top; i++) {
jbe@84	526 luaL_checklstring(L, i, &strlen);
jbe@84	527 lua_pushvalue(L, i);
jbe@84	528 lua_rawseti(L, -2, handle->writeqin++);
jbe@84	529 handle->writeleft += strlen;
jbe@81	530 }
jbe@132	531 if (flush) handle->flushedleft = handle->writeleft;
jbe@83	532 while (handle->writeqout != handle->writeqin) {
jbe@83	533 lua_rawgeti(L, -1, handle->writeqout);
jbe@81	534 str = lua_tolstring(L, -1, &strlen);
jbe@92	535 while (handle->writeqoff < strlen) {
jbe@103	536 if (
jbe@132	537 strlen - handle->writeqoff <
jbe@103	538 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103	539 ) {
jbe@103	540 memcpy(
jbe@103	541 handle->writebuf + handle->writebufin,
jbe@103	542 str + handle->writeqoff,
jbe@103	543 strlen - handle->writeqoff
jbe@103	544 );
jbe@103	545 handle->writebufin += strlen - handle->writeqoff;
jbe@80	546 break;
jbe@80	547 } else {
jbe@103	548 memcpy(
jbe@103	549 handle->writebuf + handle->writebufin,
jbe@103	550 str + handle->writeqoff,
jbe@103	551 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103	552 );
jbe@103	553 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@228	554 handle->writebufin = MOONBR_IO_WRITEBUFLEN;
jbe@103	555 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@257	556 if (moonbr_io_handle_set_nopush(L, handle, 1)) moonbr_io_return_errmsg();
jbe@249	557 #ifdef MOONBR_IO_USE_TLS
jbe@250	558 moonbr_io_write_tls(
jbe@250	559 handle->writebuf + handle->writebufout,
jbe@250	560 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@250	561 )
jbe@249	562 #endif
jbe@103	563 written = write(
jbe@103	564 handle->fd,
jbe@103	565 handle->writebuf + handle->writebufout,
jbe@103	566 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103	567 );
jbe@103	568 if (written < 0) {
jbe@81	569 if (nonblocking && (errno == EAGAIN \|\| errno == EWOULDBLOCK)) {
jbe@81	570 goto moonbr_io_write_impl_block;
jbe@257	571 } else if (errno != EINTR) moonbr_io_return_errmsg();
jbe@103	572 } else {
jbe@103	573 handle->writebufout += written;
jbe@103	574 handle->writeleft -= written;
jbe@133	575 if (handle->flushedleft) {
jbe@133	576 if (written >= handle->flushedleft) {
jbe@133	577 handle->flushedleft = 0;
jbe@257	578 if (moonbr_io_handle_set_nopush(L, handle, 0)) moonbr_io_return_errmsg();
jbe@133	579 } else {
jbe@133	580 handle->flushedleft -= written;
jbe@133	581 }
jbe@133	582 }
jbe@80	583 }
jbe@80	584 }
jbe@103	585 handle->writebufin = 0;
jbe@103	586 handle->writebufout = 0;
jbe@80	587 }
jbe@80	588 }
jbe@81	589 handle->writeqoff = 0;
jbe@81	590 lua_pop(L, 1);
jbe@81	591 lua_pushnil(L);
jbe@83	592 lua_rawseti(L, -2, handle->writeqout++);
jbe@80	593 }
jbe@132	594 while (handle->flushedleft) {
jbe@257	595 if (moonbr_io_handle_set_nopush(L, handle, 1)) moonbr_io_return_errmsg();
jbe@249	596 #ifdef MOONBR_IO_USE_TLS
jbe@250	597 moonbr_io_write_tls(
jbe@250	598 handle->writebuf + handle->writebufout,
jbe@250	599 handle->writebufin - handle->writebufout
jbe@250	600 )
jbe@249	601 #endif
jbe@132	602 written = write(
jbe@132	603 handle->fd,
jbe@132	604 handle->writebuf + handle->writebufout,
jbe@132	605 handle->writebufin - handle->writebufout
jbe@132	606 );
jbe@132	607 if (written < 0) {
jbe@132	608 if (nonblocking && (errno == EAGAIN \|\| errno == EWOULDBLOCK)) {
jbe@132	609 goto moonbr_io_write_impl_block;
jbe@257	610 } else if (errno != EINTR) moonbr_io_return_errmsg();
jbe@132	611 } else {
jbe@132	612 handle->writebufout += written;
jbe@132	613 handle->writeleft -= written;
jbe@133	614 if (handle->flushedleft) {
jbe@133	615 if (written >= handle->flushedleft) {
jbe@133	616 handle->flushedleft = 0;
jbe@257	617 if (moonbr_io_handle_set_nopush(L, handle, 0)) moonbr_io_return_errmsg();
jbe@133	618 } else {
jbe@133	619 handle->flushedleft -= written;
jbe@133	620 }
jbe@133	621 }
jbe@81	622 }
jbe@132	623 }
jbe@132	624 if (handle->writebufout == handle->writebufin) {
jbe@103	625 handle->writebufin = 0;
jbe@103	626 handle->writebufout = 0;
jbe@81	627 }
jbe@103	628 if (nonblocking) lua_pushinteger(L, 0);
jbe@103	629 else lua_pushvalue(L, 1);
jbe@103	630 handle->writeerr = 0;
jbe@80	631 return 1;
jbe@81	632 moonbr_io_write_impl_block:
jbe@91	633 lua_pushinteger(L, handle->writeleft);
jbe@103	634 handle->writeerr = 0;
jbe@81	635 return 1;
jbe@81	636 }
jbe@81	637
jbe@81	638 static int moonbr_io_write(lua_State *L) {
jbe@81	639 return moonbr_io_write_impl(L, 0, 0);
jbe@81	640 }
jbe@81	641
jbe@81	642 static int moonbr_io_write_nb(lua_State *L) {
jbe@81	643 return moonbr_io_write_impl(L, 1, 0);
jbe@80	644 }
jbe@80	645
jbe@80	646 static int moonbr_io_flush(lua_State *L) {
jbe@81	647 return moonbr_io_write_impl(L, 0, 1);
jbe@81	648 }
jbe@81	649
jbe@81	650 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81	651 return moonbr_io_write_impl(L, 1, 1);
jbe@80	652 }
jbe@80	653
jbe@145	654 #if LUA_VERSION_NUM >= 503
jbe@145	655 static int moonbr_io_write_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@145	656 #else
jbe@145	657 static int moonbr_io_write_cont(lua_State *L) {
jbe@145	658 #endif
jbe@145	659 while (1) {
jbe@145	660 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145	661 lua_pushvalue(L, 1);
jbe@145	662 lua_call(L, 1, 2);
jbe@145	663 if (lua_isnil(L, -2)) return 2;
jbe@145	664 if (!lua_tointeger(L, -2)) {
jbe@145	665 lua_pushvalue(L, 1);
jbe@145	666 return 1;
jbe@145	667 }
jbe@145	668 lua_pop(L, 2);
jbe@145	669 lua_pushvalue(L, 2);
jbe@152	670 lua_callk(L, 0, 0, 0, moonbr_io_write_cont);
jbe@145	671 }
jbe@145	672 }
jbe@145	673
jbe@145	674 static int moonbr_io_write_call(lua_State *L) {
jbe@145	675 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145	676 lua_insert(L, 3);
jbe@145	677 lua_pushvalue(L, 1);
jbe@145	678 lua_insert(L, 4);
jbe@145	679 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145	680 if (lua_isnil(L, -2)) return 2;
jbe@145	681 if (!lua_tointeger(L, -2)) {
jbe@145	682 lua_pushvalue(L, 1);
jbe@145	683 return 1;
jbe@145	684 }
jbe@145	685 #if LUA_VERSION_NUM >= 503
jbe@145	686 return moonbr_io_write_cont(L, 0, 0);
jbe@145	687 #else
jbe@145	688 return moonbr_io_write_cont(L);
jbe@145	689 #endif
jbe@145	690 }
jbe@145	691
jbe@145	692 moonbr_io_yield_wrapper(moonbr_io_write_yield, moonbr_io_write_call);
jbe@145	693
jbe@145	694 static int moonbr_io_flush_call(lua_State *L) {
jbe@145	695 lua_pushcfunction(L, moonbr_io_flush_nb);
jbe@145	696 lua_insert(L, 3);
jbe@145	697 lua_pushvalue(L, 1);
jbe@145	698 lua_insert(L, 4);
jbe@145	699 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145	700 if (lua_isnil(L, -2)) return 2;
jbe@145	701 if (!lua_tointeger(L, -2)) {
jbe@145	702 lua_pushvalue(L, 1);
jbe@145	703 return 1;
jbe@145	704 }
jbe@145	705 #if LUA_VERSION_NUM >= 503
jbe@145	706 return moonbr_io_write_cont(L, 0, 0);
jbe@145	707 #else
jbe@145	708 return moonbr_io_write_cont(L);
jbe@145	709 #endif
jbe@145	710 }
jbe@145	711
jbe@145	712 moonbr_io_yield_wrapper(moonbr_io_flush_yield, moonbr_io_flush_call);
jbe@145	713
jbe@88	714 static int moonbr_io_finish(lua_State *L) {
jbe@88	715 moonbr_io_handle_t *handle;
jbe@88	716 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94	717 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94	718 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94	719 if (handle->writeleft) {
jbe@94	720 lua_pushcfunction(L, moonbr_io_flush);
jbe@94	721 lua_pushvalue(L, 1);
jbe@116	722 if (lua_pcall(L, 1, 2, 0)) {
jbe@116	723 handle->finished = 1;
jbe@116	724 lua_error(L);
jbe@116	725 }
jbe@94	726 if (!lua_toboolean(L, -2)) {
jbe@94	727 handle->finished = 1;
jbe@94	728 return 2;
jbe@88	729 }
jbe@94	730 }
jbe@94	731 handle->finished = 1;
jbe@260	732 #ifdef MOONBR_IO_USE_TLS
jbe@260	733 if ((handle->addrfam == AF_INET6 \|\| handle->addrfam == AF_INET) && !handle->tls) {
jbe@260	734 #else
jbe@107	735 if (handle->addrfam == AF_INET6 \|\| handle->addrfam == AF_INET) {
jbe@260	736 #endif
jbe@257	737 if (shutdown(handle->fd, SHUT_WR)) moonbr_io_return_errmsg();
jbe@94	738 } else {
jbe@251	739 #ifdef MOONBR_IO_USE_TLS
jbe@260	740 if (handle->tls) {
jbe@260	741 int status;
jbe@260	742 if (moonbr_io_handle_set_nonblocking(L, handle, 1)) moonbr_io_return_errmsg();
jbe@260	743 do status = tls_close(handle->tls);
jbe@260	744 while (status == TLS_WANT_POLLIN \|\| status == TLS_WANT_POLLOUT);
jbe@260	745 if (status) {
jbe@260	746 close(handle->fd);
jbe@260	747 handle->fd = -1;
jbe@260	748 lua_pushnil(L);
jbe@260	749 lua_pushstring(L, tls_error(handle->tls));
jbe@260	750 return 2;
jbe@260	751 }
jbe@260	752 }
jbe@251	753 #endif
jbe@94	754 if (close(handle->fd)) {
jbe@94	755 handle->fd = -1;
jbe@257	756 moonbr_io_return_errmsg();
jbe@94	757 }
jbe@94	758 handle->fd = -1; /* fake EOF on read */
jbe@88	759 }
jbe@88	760 lua_pushboolean(L, 1);
jbe@88	761 return 1;
jbe@88	762 }
jbe@88	763
jbe@261	764 static int moonbr_io_close_impl(lua_State *L, int nonblocking, int reset) {
jbe@83	765 moonbr_io_handle_t *handle;
jbe@83	766 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94	767 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@259	768 if (!reset && handle->fd >= 0) {
jbe@87	769 if (handle->writeleft) {
jbe@261	770 lua_pushcfunction(L, nonblocking ? moonbr_io_flush_nb : moonbr_io_flush);
jbe@87	771 lua_pushvalue(L, 1);
jbe@116	772 if (lua_pcall(L, 1, 2, 0)) {
jbe@129	773 handle->closed = 1;
jbe@116	774 close(handle->fd);
jbe@116	775 handle->fd = -1;
jbe@116	776 lua_error(L);
jbe@116	777 }
jbe@261	778 if (!nonblocking) handle->closed = 1; /* TODO: handle nonblocking case */
jbe@87	779 if (!lua_toboolean(L, -2)) {
jbe@87	780 close(handle->fd);
jbe@87	781 handle->fd = -1;
jbe@87	782 return 2;
jbe@87	783 }
jbe@261	784 #if LUA_VERSION_NUM >= 503
jbe@261	785 if (nonblocking && lua_tointeger(L, -2)) {
jbe@261	786 #else
jbe@261	787 if (nonblocking && lua_tonumber(L, -2)) {
jbe@261	788 #endif
jbe@261	789 lua_pushliteral(L, "flush");
jbe@261	790 lua_pushvalue(L, -3);
jbe@261	791 return 2;
jbe@261	792 }
jbe@129	793 } else {
jbe@129	794 handle->closed = 1;
jbe@83	795 }
jbe@260	796 #ifdef MOONBR_IO_USE_TLS
jbe@260	797 if (handle->tls) {
jbe@260	798 int status;
jbe@261	799 if (moonbr_io_handle_set_nonblocking(L, handle, nonblocking)) moonbr_io_return_errmsg();
jbe@260	800 do status = tls_close(handle->tls);
jbe@261	801 while (!nonblocking && (status == TLS_WANT_POLLIN \|\| status == TLS_WANT_POLLOUT));
jbe@261	802 if (status == TLS_WANT_POLLIN \|\| status == TLS_WANT_POLLOUT) {
jbe@261	803 handle->tlsclosing = status; /* TODO: handle polling */
jbe@261	804 lua_pushliteral(L, "close");
jbe@261	805 return 1;
jbe@261	806 }
jbe@260	807 if (status) {
jbe@260	808 close(handle->fd);
jbe@260	809 handle->fd = -1;
jbe@260	810 lua_pushnil(L);
jbe@260	811 lua_pushstring(L, tls_error(handle->tls));
jbe@260	812 return 2;
jbe@260	813 }
jbe@260	814 }
jbe@260	815 #endif
jbe@256	816 if (moonbr_io_handle_set_linger(L, handle, -1)) {
jbe@257	817 moonbr_io_prepare_errmsg();
jbe@256	818 close(handle->fd);
jbe@256	819 handle->fd = -1;
jbe@257	820 moonbr_io_return_prepared_errmsg();
jbe@256	821 }
jbe@129	822 } else {
jbe@129	823 handle->closed = 1;
jbe@83	824 }
jbe@94	825 if (handle->fd >= 0) {
jbe@94	826 if (close(handle->fd)) {
jbe@94	827 handle->fd = -1;
jbe@257	828 moonbr_io_return_errmsg();
jbe@94	829 }
jbe@104	830 handle->fd = -1;
jbe@83	831 }
jbe@83	832 lua_pushboolean(L, 1);
jbe@83	833 return 1;
jbe@84	834
jbe@83	835 }
jbe@83	836
jbe@94	837 static int moonbr_io_close(lua_State *L) {
jbe@261	838 return moonbr_io_close_impl(L, 0, 0);
jbe@94	839 }
jbe@94	840
jbe@84	841 static int moonbr_io_reset(lua_State *L) {
jbe@261	842 return moonbr_io_close_impl(L, 0, 1);
jbe@84	843 }
jbe@84	844
jbe@108	845 static int moonbr_io_handlegc(lua_State *L) {
jbe@88	846 moonbr_io_handle_t *handle;
jbe@88	847 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88	848 if (handle->fd >= 0) {
jbe@218	849 lua_pushcfunction(L, moonbr_io_reset);
jbe@88	850 lua_pushvalue(L, 1);
jbe@88	851 lua_pushinteger(L, 0);
jbe@88	852 lua_call(L, 2, 0);
jbe@88	853 }
jbe@246	854 #ifdef MOONBR_IO_USE_TLS
jbe@246	855 if (handle->tls) {
jbe@246	856 tls_free(handle->tls);
jbe@246	857 handle->tls = NULL;
jbe@246	858 }
jbe@246	859 if (handle->servertls) {
jbe@246	860 tls_free(handle->servertls);
jbe@246	861 handle->servertls = NULL;
jbe@246	862 }
jbe@246	863 #endif
jbe@88	864 return 0;
jbe@88	865 }
jbe@88	866
jbe@100	867 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88	868 moonbr_io_handle_t *handle;
jbe@88	869 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100	870 if (!handle->closed) {
jbe@100	871 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100	872 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100	873 lua_call(L, 1, 0);
jbe@88	874 }
jbe@88	875 }
jbe@88	876
jbe@208	877 static int moonbr_io_pushhandle_impl(lua_State *L) {
jbe@208	878 int *fd;
jbe@79	879 moonbr_io_handle_t *handle;
jbe@107	880 struct sockaddr addr;
jbe@107	881 socklen_t addrlen;
jbe@208	882 fd = lua_touserdata(L, 1);
jbe@79	883 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@208	884 handle->fd = -1; /* avoid closing incomplete handle */
jbe@107	885 addrlen = sizeof(addr);
jbe@208	886 if (getsockname(*fd, &addr, &addrlen)) {
jbe@107	887 if (errno != ENOTSOCK) {
jbe@257	888 moonbr_io_prepare_errmsg();
jbe@107	889 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107	890 }
jbe@107	891 handle->issock = 0;
jbe@107	892 } else {
jbe@107	893 handle->issock = 1;
jbe@107	894 handle->addrfam = addr.sa_family;
jbe@107	895 }
jbe@94	896 handle->finished = 0;
jbe@94	897 handle->closed = 0;
jbe@81	898 handle->nonblocking = -1;
jbe@95	899 handle->nopush = -1;
jbe@85	900 handle->readerr = 0;
jbe@105	901 handle->readbufin = 0;
jbe@105	902 handle->readbufout = 0;
jbe@81	903 handle->writeerr = 0;
jbe@81	904 handle->writeleft = 0;
jbe@132	905 handle->flushedleft = 0;
jbe@83	906 handle->writeqin = 0;
jbe@83	907 handle->writeqout = 0;
jbe@81	908 handle->writeqoff = 0;
jbe@103	909 handle->writebufin = 0;
jbe@103	910 handle->writebufout = 0;
jbe@246	911 #ifdef MOONBR_IO_USE_TLS
jbe@246	912 handle->tls = NULL;
jbe@246	913 handle->servertls = NULL;
jbe@250	914 handle->tlshandshake = 0;
jbe@261	915 handle->tlsclosing = 0;
jbe@246	916 #endif
jbe@208	917 handle->fd = fd; / required for set_linger call */
jbe@256	918 if (moonbr_io_handle_set_linger(L, handle, 0)) {
jbe@257	919 moonbr_io_prepare_errmsg();
jbe@256	920 handle->fd = -1;
jbe@256	921 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@256	922 }
jbe@208	923 handle->fd = -1; /* avoid closing incomplete handle */
jbe@238	924 luaL_setmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79	925 lua_newtable(L); // uservalue
jbe@81	926 lua_newtable(L);
jbe@103	927 lua_setfield(L, -2, "writequeue");
jbe@79	928 lua_newtable(L); // public
jbe@107	929 if (handle->addrfam == AF_INET6) {
jbe@107	930 struct sockaddr_in6 addr_in6;
jbe@107	931 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107	932 const char *addrstr;
jbe@107	933 addrlen = sizeof(addr_in6);
jbe@208	934 if (getsockname(fd, (struct sockaddr )&addr_in6, &addrlen)) {
jbe@257	935 moonbr_io_prepare_errmsg();
jbe@107	936 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107	937 }
jbe@107	938 if (addrlen > sizeof(addr_in6)) {
jbe@107	939 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107	940 }
jbe@107	941 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107	942 if (!addrstr) {
jbe@257	943 moonbr_io_prepare_errmsg();
jbe@107	944 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107	945 } else {
jbe@107	946 lua_pushstring(L, addrstr);
jbe@107	947 lua_setfield(L, -2, "local_ip6");
jbe@107	948 }
jbe@107	949 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107	950 lua_setfield(L, -2, "local_tcpport");
jbe@208	951 if (getpeername(fd, (struct sockaddr )&addr_in6, &addrlen)) {
jbe@257	952 moonbr_io_prepare_errmsg();
jbe@107	953 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107	954 }
jbe@107	955 if (addrlen > sizeof(addr_in6)) {
jbe@107	956 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107	957 }
jbe@107	958 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107	959 if (!addrstr) {
jbe@257	960 moonbr_io_prepare_errmsg();
jbe@107	961 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107	962 } else {
jbe@107	963 lua_pushstring(L, addrstr);
jbe@107	964 lua_setfield(L, -2, "remote_ip6");
jbe@107	965 }
jbe@107	966 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107	967 lua_setfield(L, -2, "remote_tcpport");
jbe@107	968 } else if (handle->addrfam == AF_INET) {
jbe@107	969 struct sockaddr_in addr_in;
jbe@107	970 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107	971 const char *addrstr;
jbe@107	972 addrlen = sizeof(addr_in);
jbe@208	973 if (getsockname(fd, (struct sockaddr )&addr_in, &addrlen)) {
jbe@257	974 moonbr_io_prepare_errmsg();
jbe@107	975 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107	976 }
jbe@107	977 if (addrlen > sizeof(addr_in)) {
jbe@107	978 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107	979 }
jbe@107	980 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107	981 if (!addrstr) {
jbe@257	982 moonbr_io_prepare_errmsg();
jbe@107	983 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107	984 } else {
jbe@107	985 lua_pushstring(L, addrstr);
jbe@107	986 lua_setfield(L, -2, "local_ip4");
jbe@107	987 }
jbe@107	988 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107	989 lua_setfield(L, -2, "local_tcpport");
jbe@208	990 if (getpeername(fd, (struct sockaddr )&addr_in, &addrlen)) {
jbe@257	991 moonbr_io_prepare_errmsg();
jbe@107	992 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107	993 }
jbe@107	994 if (addrlen > sizeof(addr_in)) {
jbe@107	995 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107	996 }
jbe@107	997 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107	998 if (!addrstr) {
jbe@257	999 moonbr_io_prepare_errmsg();
jbe@107	1000 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107	1001 } else {
jbe@107	1002 lua_pushstring(L, addrstr);
jbe@107	1003 lua_setfield(L, -2, "remote_ip4");
jbe@107	1004 }
jbe@107	1005 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107	1006 lua_setfield(L, -2, "remote_tcpport");
jbe@107	1007 }
jbe@238	1008 luaL_setmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79	1009 lua_setfield(L, -2, "public");
jbe@79	1010 lua_setuservalue(L, -2);
jbe@208	1011 handle->fd = *fd;
jbe@208	1012 fd = -1; / closing is now handled by garbage collection */
jbe@208	1013 return 1;
jbe@208	1014 }
jbe@208	1015
jbe@208	1016 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@208	1017 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208	1018 lua_pushlightuserdata(L, &fd);
jbe@208	1019 if (lua_pcall(L, 1, 1, 0)) {
jbe@251	1020 if (fd != -1) close(fd); // TODO: correct to close file descriptor here?
jbe@208	1021 lua_error(L);
jbe@208	1022 }
jbe@79	1023 }
jbe@79	1024
jbe@79	1025 static int moonbr_io_handleindex(lua_State *L) {
jbe@80	1026 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205	1027 luaL_checkany(L, 2);
jbe@79	1028 lua_getuservalue(L, 1);
jbe@79	1029 lua_getfield(L, -1, "public");
jbe@79	1030 lua_pushvalue(L, 2);
jbe@79	1031 lua_gettable(L, -2);
jbe@79	1032 return 1;
jbe@79	1033 }
jbe@79	1034
jbe@79	1035 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80	1036 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205	1037 luaL_checkany(L, 2);
jbe@205	1038 luaL_checkany(L, 3);
jbe@79	1039 lua_getuservalue(L, 1);
jbe@79	1040 lua_getfield(L, -1, "public");
jbe@79	1041 lua_pushvalue(L, 2);
jbe@79	1042 lua_pushvalue(L, 3);
jbe@79	1043 lua_settable(L, -3);
jbe@79	1044 return 0;
jbe@79	1045 }
jbe@79	1046
jbe@111	1047 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111	1048 const char *path;
jbe@111	1049 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111	1050 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111	1051 (void )sockaddr.sun_path - (void )&sockaddr
jbe@111	1052 ) - 1; /* one byte for termination */
jbe@111	1053 int sock;
jbe@111	1054 path = luaL_checkstring(L, 1);
jbe@111	1055 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111	1056 strcpy(sockaddr.sun_path, path);
jbe@111	1057 sock = socket(
jbe@111	1058 PF_LOCAL,
jbe@111	1059 SOCK_STREAM \| SOCK_CLOEXEC \| (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111	1060 0
jbe@111	1061 );
jbe@257	1062 if (sock < 0) moonbr_io_return_errmsg();
jbe@111	1063 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111	1064 if (!nonblocking && errno == EINTR) {
jbe@257	1065 moonbr_io_prepare_errmsg();
jbe@111	1066 close(sock);
jbe@257	1067 moonbr_io_return_prepared_errmsg();
jbe@257	1068 } else if (!(nonblocking && (errno == EINPROGRESS \|\| errno == EINTR))) moonbr_io_return_errmsg();
jbe@111	1069 }
jbe@111	1070 moonbr_io_pushhandle(L, sock);
jbe@111	1071 return 1;
jbe@111	1072 }
jbe@111	1073
jbe@111	1074 static int moonbr_io_localconnect(lua_State *L) {
jbe@111	1075 return moonbr_io_localconnect_impl(L, 0);
jbe@111	1076 }
jbe@111	1077
jbe@111	1078 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111	1079 return moonbr_io_localconnect_impl(L, 1);
jbe@111	1080 }
jbe@111	1081
jbe@99	1082 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98	1083 const char host, port;
jbe@98	1084 struct addrinfo hints = { 0, };
jbe@98	1085 struct addrinfo res, addrinfo;
jbe@98	1086 int errcode;
jbe@98	1087 int sock;
jbe@98	1088 host = luaL_checkstring(L, 1);
jbe@98	1089 port = luaL_checkstring(L, 2);
jbe@98	1090 hints.ai_family = AF_UNSPEC;
jbe@98	1091 hints.ai_socktype = SOCK_STREAM;
jbe@98	1092 hints.ai_protocol = IPPROTO_TCP;
jbe@98	1093 hints.ai_flags = AI_ADDRCONFIG;
jbe@98	1094 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98	1095 if (errcode) {
jbe@102	1096 freeaddrinfo(res);
jbe@98	1097 if (errcode == EAI_SYSTEM) {
jbe@257	1098 moonbr_io_prepare_errmsg();
jbe@98	1099 lua_pushnil(L);
jbe@98	1100 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98	1101 } else {
jbe@98	1102 lua_pushnil(L);
jbe@98	1103 lua_pushstring(L, gai_strerror(errcode));
jbe@98	1104 }
jbe@98	1105 return 2;
jbe@98	1106 }
jbe@98	1107 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134	1108 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98	1109 }
jbe@98	1110 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134	1111 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98	1112 }
jbe@98	1113 addrinfo = res;
jbe@98	1114 moonbr_io_tcpconnect_found:
jbe@99	1115 sock = socket(
jbe@134	1116 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99	1117 addrinfo->ai_socktype \| SOCK_CLOEXEC \| (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99	1118 addrinfo->ai_protocol
jbe@99	1119 );
jbe@98	1120 if (sock < 0) {
jbe@257	1121 moonbr_io_prepare_errmsg();
jbe@108	1122 freeaddrinfo(res);
jbe@257	1123 moonbr_io_return_prepared_errmsg();
jbe@98	1124 }
jbe@98	1125 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108	1126 freeaddrinfo(res);
jbe@99	1127 if (!nonblocking && errno == EINTR) {
jbe@257	1128 moonbr_io_prepare_errmsg();
jbe@99	1129 close(sock);
jbe@257	1130 moonbr_io_return_prepared_errmsg();
jbe@257	1131 } else if (!(nonblocking && (errno == EINPROGRESS \|\| errno == EINTR))) moonbr_io_return_errmsg();
jbe@108	1132 } else {
jbe@108	1133 freeaddrinfo(res);
jbe@98	1134 }
jbe@107	1135 moonbr_io_pushhandle(L, sock);
jbe@98	1136 return 1;
jbe@98	1137 }
jbe@98	1138
jbe@99	1139 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99	1140 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99	1141 }
jbe@99	1142
jbe@99	1143 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99	1144 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99	1145 }
jbe@99	1146
jbe@112	1147 static int moonbr_io_locallisten(lua_State *L) {
jbe@112	1148 moonbr_io_listener_t *listener;
jbe@112	1149 const char *path;
jbe@118	1150 struct stat sb;
jbe@112	1151 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112	1152 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112	1153 (void )sockaddr.sun_path - (void )&sockaddr
jbe@112	1154 ) - 1; /* one byte for termination */
jbe@112	1155 int sock;
jbe@112	1156 path = luaL_checkstring(L, 1);
jbe@112	1157 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112	1158 strcpy(sockaddr.sun_path, path);
jbe@118	1159 if (stat(path, &sb) == 0) {
jbe@118	1160 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118	1161 }
jbe@112	1162 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117	1163 listener->fd = -1;
jbe@112	1164 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112	1165 sock = socket(
jbe@112	1166 PF_LOCAL,
jbe@112	1167 SOCK_STREAM \| SOCK_CLOEXEC,
jbe@112	1168 0
jbe@112	1169 );
jbe@257	1170 if (sock < 0) moonbr_io_return_errmsg();
jbe@112	1171 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@257	1172 moonbr_io_prepare_errmsg();
jbe@112	1173 close(sock);
jbe@257	1174 moonbr_io_return_prepared_errmsg();
jbe@112	1175 }
jbe@112	1176 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@257	1177 moonbr_io_prepare_errmsg();
jbe@112	1178 close(sock);
jbe@257	1179 moonbr_io_return_prepared_errmsg();
jbe@112	1180 }
jbe@112	1181 listener->fd = sock;
jbe@118	1182 listener->addrfam = AF_LOCAL;
jbe@112	1183 listener->nonblocking = -1;
jbe@112	1184 return 1;
jbe@112	1185 }
jbe@112	1186
jbe@108	1187 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108	1188 moonbr_io_listener_t *listener;
jbe@108	1189 const char host, port;
jbe@108	1190 struct addrinfo hints = { 0, };
jbe@108	1191 struct addrinfo res, addrinfo;
jbe@108	1192 int errcode;
jbe@108	1193 int sock;
jbe@108	1194 host = luaL_optstring(L, 1, NULL);
jbe@108	1195 port = luaL_checkstring(L, 2);
jbe@108	1196 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117	1197 listener->fd = -1;
jbe@108	1198 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108	1199 hints.ai_family = AF_UNSPEC;
jbe@108	1200 hints.ai_socktype = SOCK_STREAM;
jbe@108	1201 hints.ai_protocol = IPPROTO_TCP;
jbe@108	1202 hints.ai_flags = AI_ADDRCONFIG \| AI_PASSIVE;
jbe@108	1203 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108	1204 if (errcode) {
jbe@108	1205 freeaddrinfo(res);
jbe@108	1206 if (errcode == EAI_SYSTEM) {
jbe@257	1207 moonbr_io_prepare_errmsg();
jbe@108	1208 lua_pushnil(L);
jbe@108	1209 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108	1210 } else {
jbe@108	1211 lua_pushnil(L);
jbe@108	1212 lua_pushstring(L, gai_strerror(errcode));
jbe@108	1213 }
jbe@108	1214 return 2;
jbe@108	1215 }
jbe@108	1216 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134	1217 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108	1218 }
jbe@108	1219 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134	1220 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108	1221 }
jbe@108	1222 addrinfo = res;
jbe@108	1223 moonbr_io_tcpconnect_found:
jbe@118	1224 listener->addrfam = addrinfo->ai_family;
jbe@108	1225 sock = socket(
jbe@134	1226 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108	1227 addrinfo->ai_socktype \| SOCK_CLOEXEC,
jbe@108	1228 addrinfo->ai_protocol
jbe@108	1229 );
jbe@108	1230 if (sock < 0) {
jbe@257	1231 moonbr_io_prepare_errmsg();
jbe@108	1232 freeaddrinfo(res);
jbe@257	1233 moonbr_io_return_prepared_errmsg();
jbe@108	1234 }
jbe@120	1235 {
jbe@120	1236 static const int reuseval = 1;
jbe@120	1237 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@257	1238 moonbr_io_prepare_errmsg();
jbe@120	1239 freeaddrinfo(res);
jbe@120	1240 close(sock);
jbe@120	1241 lua_pushnil(L);
jbe@120	1242 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120	1243 return 2;
jbe@120	1244 }
jbe@120	1245 }
jbe@108	1246 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@257	1247 moonbr_io_prepare_errmsg();
jbe@108	1248 freeaddrinfo(res);
jbe@108	1249 close(sock);
jbe@257	1250 moonbr_io_return_prepared_errmsg();
jbe@108	1251 }
jbe@108	1252 freeaddrinfo(res);
jbe@108	1253 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@257	1254 moonbr_io_prepare_errmsg();
jbe@108	1255 close(sock);
jbe@257	1256 moonbr_io_return_prepared_errmsg();
jbe@108	1257 }
jbe@108	1258 listener->fd = sock;
jbe@108	1259 listener->nonblocking = -1;
jbe@108	1260 return 1;
jbe@108	1261 }
jbe@108	1262
jbe@108	1263 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108	1264 moonbr_io_listener_t *listener;
jbe@108	1265 int fd;
jbe@108	1266 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108	1267 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108	1268 if (listener->nonblocking != nonblocking) {
jbe@108	1269 int flags;
jbe@108	1270 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108	1271 if (flags == -1) {
jbe@257	1272 moonbr_io_prepare_errmsg();
jbe@108	1273 close(listener->fd);
jbe@108	1274 listener->fd = -1;
jbe@108	1275 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108	1276 }
jbe@108	1277 if (nonblocking) flags \|= O_NONBLOCK;
jbe@108	1278 else flags &= ~O_NONBLOCK;
jbe@108	1279 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@257	1280 moonbr_io_prepare_errmsg();
jbe@108	1281 close(listener->fd);
jbe@108	1282 listener->fd = -1;
jbe@108	1283 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108	1284 }
jbe@108	1285 listener->nonblocking = nonblocking;
jbe@108	1286 }
jbe@108	1287 while (1) {
jbe@214	1288 #if defined(__linux__) && !defined(_GNU_SOURCE)
jbe@215	1289 fd = accept(listener->fd, NULL, NULL);
jbe@214	1290 if (fd != -1) {
jbe@214	1291 if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) {
jbe@257	1292 moonbr_io_prepare_errmsg();
jbe@214	1293 close(listener->fd);
jbe@214	1294 listener->fd = -1;
jbe@214	1295 close(fd);
jbe@214	1296 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@214	1297 }
jbe@214	1298 }
jbe@214	1299 #else
jbe@108	1300 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@214	1301 #endif
jbe@108	1302 if (fd < 0) {
jbe@108	1303 if (nonblocking && (errno == EAGAIN \|\| errno == EWOULDBLOCK)) {
jbe@108	1304 lua_pushboolean(L, 0);
jbe@108	1305 lua_pushliteral(L, "No incoming connection pending");
jbe@108	1306 return 2;
jbe@257	1307 } else if (errno != EINTR) moonbr_io_return_errmsg();
jbe@108	1308 } else {
jbe@108	1309 moonbr_io_pushhandle(L, fd);
jbe@108	1310 return 1;
jbe@108	1311 }
jbe@108	1312 }
jbe@108	1313 }
jbe@108	1314
jbe@108	1315 static int moonbr_io_accept(lua_State *L) {
jbe@108	1316 return moonbr_io_accept_impl(L, 0);
jbe@108	1317 }
jbe@108	1318
jbe@108	1319 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108	1320 return moonbr_io_accept_impl(L, 1);
jbe@108	1321 }
jbe@108	1322
jbe@108	1323 static int moonbr_io_unlisten(lua_State *L) {
jbe@108	1324 moonbr_io_listener_t *listener;
jbe@118	1325 struct sockaddr_un addr;
jbe@118	1326 socklen_t addrlen;
jbe@118	1327 struct stat sb;
jbe@108	1328 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108	1329 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118	1330 addrlen = sizeof(addr);
jbe@118	1331 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108	1332 if (close(listener->fd)) {
jbe@257	1333 moonbr_io_prepare_errmsg();
jbe@108	1334 listener->fd = -1;
jbe@118	1335 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118	1336 if (stat(addr.sun_path, &sb) == 0) {
jbe@118	1337 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118	1338 }
jbe@118	1339 }
jbe@257	1340 moonbr_io_return_prepared_errmsg();
jbe@108	1341 }
jbe@108	1342 listener->fd = -1;
jbe@118	1343 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118	1344 if (stat(addr.sun_path, &sb) == 0) {
jbe@118	1345 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118	1346 }
jbe@118	1347 }
jbe@108	1348 lua_pushboolean(L, 1);
jbe@108	1349 return 1;
jbe@108	1350 }
jbe@108	1351
jbe@108	1352 static int moonbr_io_listenergc(lua_State *L) {
jbe@108	1353 moonbr_io_listener_t *listener;
jbe@108	1354 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117	1355 if (listener->fd >= 0) close(listener->fd);
jbe@108	1356 listener->fd = -1;
jbe@108	1357 return 0;
jbe@108	1358 }
jbe@108	1359
jbe@205	1360 static int moonbr_io_exec(lua_State *L) {
jbe@205	1361 char **argv;
jbe@205	1362 int i, argc;
jbe@205	1363 int sockin[2], sockout[2], sockerr[2];
jbe@205	1364 volatile int errorcond = 0;
jbe@213	1365 volatile char errmsgbuf[MOONBR_IO_MAXSTRERRORLEN] = MOONBR_IO_STRERROR_R_MSG;
jbe@205	1366 moonbr_io_child_t *child;
jbe@205	1367 argc = lua_gettop(L);
jbe@205	1368 argv = lua_newuserdata(L, (argc + 1) * sizeof(char *));
jbe@205	1369 for (i=0; i<argc; i++) argv[i] = (char *)luaL_checkstring(L, i+1);
jbe@205	1370 argv[argc] = NULL;
jbe@208	1371 child = lua_newuserdata(L, sizeof(moonbr_io_child_t));
jbe@208	1372 child->pid = 0;
jbe@208	1373 lua_newtable(L);
jbe@208	1374 lua_setuservalue(L, -2);
jbe@238	1375 luaL_setmetatable(L, MOONBR_IO_CHILD_MT_REGKEY);
jbe@206	1376 if (socketpair(PF_LOCAL, SOCK_STREAM \| SOCK_CLOEXEC, 0, sockin)) {
jbe@257	1377 moonbr_io_prepare_errmsg();
jbe@205	1378 lua_pushnil(L);
jbe@205	1379 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205	1380 return 2;
jbe@205	1381 }
jbe@206	1382 if (socketpair(PF_LOCAL, SOCK_STREAM \| SOCK_CLOEXEC, 0, sockout)) {
jbe@257	1383 moonbr_io_prepare_errmsg();
jbe@205	1384 close(sockin[0]);
jbe@205	1385 close(sockin[1]);
jbe@205	1386 lua_pushnil(L);
jbe@205	1387 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205	1388 return 2;
jbe@205	1389 }
jbe@206	1390 if (socketpair(PF_LOCAL, SOCK_STREAM \| SOCK_CLOEXEC, 0, sockerr)) {
jbe@257	1391 moonbr_io_prepare_errmsg();
jbe@205	1392 close(sockin[0]);
jbe@205	1393 close(sockin[1]);
jbe@205	1394 close(sockout[0]);
jbe@205	1395 close(sockout[1]);
jbe@205	1396 lua_pushnil(L);
jbe@205	1397 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205	1398 return 2;
jbe@205	1399 }
jbe@205	1400 child->pid = vfork();
jbe@205	1401 if (child->pid == -1) {
jbe@257	1402 moonbr_io_prepare_errmsg();
jbe@205	1403 close(sockin[0]);
jbe@205	1404 close(sockin[1]);
jbe@205	1405 close(sockout[0]);
jbe@205	1406 close(sockout[1]);
jbe@205	1407 close(sockerr[0]);
jbe@205	1408 close(sockerr[1]);
jbe@205	1409 lua_pushnil(L);
jbe@205	1410 lua_pushfstring(L, "Could not fork: %s", errmsg);
jbe@205	1411 return 2;
jbe@205	1412 }
jbe@205	1413 if (!child->pid) {
jbe@208	1414 if (dup2(sockin[1], 0) == -1) goto moonbr_io_exec_error1;
jbe@208	1415 if (dup2(sockout[1], 1) == -1) goto moonbr_io_exec_error1;
jbe@208	1416 if (dup2(sockerr[1], 2) == -1) goto moonbr_io_exec_error1;
jbe@232	1417 closefrom(3);
jbe@208	1418 if (fcntl(0, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208	1419 if (fcntl(1, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208	1420 if (fcntl(2, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@205	1421 if (execvp(argv[0], argv)) {
jbe@205	1422 errorcond = 2;
jbe@205	1423 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@205	1424 _exit(0);
jbe@205	1425 }
jbe@208	1426 moonbr_io_exec_error1:
jbe@206	1427 errorcond = 1;
jbe@206	1428 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@206	1429 _exit(0);
jbe@205	1430 }
jbe@205	1431 close(sockin[1]);
jbe@205	1432 close(sockout[1]);
jbe@205	1433 close(sockerr[1]);
jbe@205	1434 if (errorcond) {
jbe@205	1435 int status;
jbe@205	1436 close(sockin[0]);
jbe@205	1437 close(sockout[0]);
jbe@205	1438 close(sockerr[0]);
jbe@205	1439 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205	1440 if (errno != EINTR) {
jbe@257	1441 moonbr_io_prepare_errmsg();
jbe@205	1442 luaL_error(L, "Error in waitpid call after unsuccessful exec: %s", errmsg);
jbe@205	1443 }
jbe@205	1444 }
jbe@208	1445 child->pid = 0;
jbe@205	1446 lua_pushnil(L);
jbe@205	1447 if (errorcond == 2) lua_pushfstring(L, "Could not execute: %s", errmsgbuf);
jbe@205	1448 else lua_pushfstring(L, "Error in fork: %s", errmsgbuf);
jbe@205	1449 return 2;
jbe@205	1450 }
jbe@208	1451 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208	1452 lua_pushlightuserdata(L, &sockin[0]);
jbe@208	1453 if (lua_pcall(L, 1, 1, 0)) {
jbe@208	1454 if (sockin[0] != -1) close(sockin[0]);
jbe@208	1455 close(sockout[0]);
jbe@208	1456 close(sockerr[0]);
jbe@208	1457 goto moonbr_io_exec_error2;
jbe@208	1458 }
jbe@205	1459 lua_setfield(L, -2, "stdin");
jbe@208	1460 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208	1461 lua_pushlightuserdata(L, &sockout[0]);
jbe@208	1462 if (lua_pcall(L, 1, 1, 0)) {
jbe@208	1463 if (sockout[0] != -1) close(sockout[0]);
jbe@208	1464 close(sockerr[0]);
jbe@208	1465 goto moonbr_io_exec_error2;
jbe@208	1466 }
jbe@205	1467 lua_setfield(L, -2, "stdout");
jbe@208	1468 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208	1469 lua_pushlightuserdata(L, &sockerr[0]);
jbe@208	1470 if (lua_pcall(L, 1, 1, 0)) {
jbe@208	1471 if (sockerr[0] != -1) close(sockerr[0]);
jbe@208	1472 goto moonbr_io_exec_error2;
jbe@208	1473 }
jbe@205	1474 lua_setfield(L, -2, "stderr");
jbe@205	1475 return 1;
jbe@208	1476 moonbr_io_exec_error2:
jbe@208	1477 {
jbe@208	1478 int status;
jbe@208	1479 while (waitpid(child->pid, &status, 0) == -1) {
jbe@208	1480 if (errno != EINTR) {
jbe@257	1481 moonbr_io_prepare_errmsg();
jbe@208	1482 luaL_error(L, "Error in waitpid call after error creating socket handles: %s", errmsg);
jbe@208	1483 }
jbe@208	1484 }
jbe@208	1485 }
jbe@208	1486 child->pid = 0;
jbe@208	1487 return lua_error(L);
jbe@205	1488 }
jbe@205	1489
jbe@205	1490 static int moonbr_io_childindex(lua_State *L) {
jbe@205	1491 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205	1492 luaL_checkany(L, 2);
jbe@205	1493 lua_getuservalue(L, 1);
jbe@205	1494 lua_pushvalue(L, 2);
jbe@205	1495 lua_gettable(L, -2);
jbe@205	1496 if (lua_isnil(L, -1)) {
jbe@205	1497 luaL_getmetatable(L, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205	1498 lua_pushvalue(L, 2);
jbe@205	1499 lua_gettable(L, -2);
jbe@205	1500 }
jbe@205	1501 return 1;
jbe@205	1502 }
jbe@205	1503
jbe@205	1504 static int moonbr_io_childnewindex(lua_State *L) {
jbe@205	1505 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205	1506 luaL_checkany(L, 2);
jbe@205	1507 luaL_checkany(L, 3);
jbe@205	1508 lua_getuservalue(L, 1);
jbe@205	1509 lua_pushvalue(L, 2);
jbe@205	1510 lua_pushvalue(L, 3);
jbe@205	1511 lua_settable(L, -3);
jbe@205	1512 return 0;
jbe@205	1513 }
jbe@205	1514
jbe@205	1515 static int moonbr_io_childgc(lua_State *L) {
jbe@205	1516 moonbr_io_child_t *child;
jbe@205	1517 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205	1518 if (child->pid) {
jbe@205	1519 int status;
jbe@205	1520 if (kill(child->pid, SIGKILL)) {
jbe@257	1521 moonbr_io_prepare_errmsg();
jbe@205	1522 luaL_error(L, "Error in kill call during garbage collection: %s", errmsg);
jbe@205	1523 }
jbe@205	1524 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205	1525 if (errno != EINTR) {
jbe@257	1526 moonbr_io_prepare_errmsg();
jbe@205	1527 luaL_error(L, "Error in waitpid call during garbage collection: %s", errmsg);
jbe@205	1528 }
jbe@205	1529 }
jbe@205	1530 }
jbe@205	1531 return 0;
jbe@205	1532 }
jbe@205	1533
jbe@205	1534 static int moonbr_io_kill(lua_State *L) {
jbe@205	1535 moonbr_io_child_t *child;
jbe@205	1536 int sig;
jbe@205	1537 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205	1538 sig = luaL_optinteger(L, 2, SIGTERM);
jbe@205	1539 if (!child->pid) luaL_error(L, "Attempt to kill an already collected child process");
jbe@205	1540 if (kill(child->pid, sig)) {
jbe@257	1541 moonbr_io_prepare_errmsg();
jbe@205	1542 luaL_error(L, "Error in kill call: %s", errmsg);
jbe@205	1543 }
jbe@205	1544 lua_settop(L, 1);
jbe@205	1545 return 1;
jbe@205	1546 }
jbe@205	1547
jbe@205	1548 static int moonbr_io_wait_impl(lua_State *L, int nonblocking) {
jbe@205	1549 moonbr_io_child_t *child;
jbe@205	1550 pid_t waitedpid;
jbe@205	1551 int status;
jbe@205	1552 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205	1553 if (!child->pid) luaL_error(L, "Attempt to wait for an already collected child process");
jbe@205	1554 while ((waitedpid = waitpid(child->pid, &status, nonblocking ? WNOHANG : 0)) == -1) {
jbe@205	1555 if (errno != EINTR) {
jbe@257	1556 moonbr_io_prepare_errmsg();
jbe@205	1557 luaL_error(L, "Error in waitpid call: %s", errmsg);
jbe@205	1558 }
jbe@205	1559 }
jbe@205	1560 if (!waitedpid) {
jbe@219	1561 lua_pushboolean(L, 0);
jbe@219	1562 lua_pushliteral(L, "Process is still running");
jbe@219	1563 return 2;
jbe@205	1564 } else {
jbe@205	1565 child->pid = 0;
jbe@205	1566 if (WIFEXITED(status)) {
jbe@205	1567 lua_pushinteger(L, WEXITSTATUS(status));
jbe@205	1568 } else if (WIFSIGNALED(status)) {
jbe@205	1569 lua_pushinteger(L, -WTERMSIG(status));
jbe@205	1570 } else {
jbe@205	1571 luaL_error(L, "Unexpected status value returned by waitpid call");
jbe@205	1572 }
jbe@219	1573 return 1;
jbe@205	1574 }
jbe@205	1575 }
jbe@205	1576
jbe@205	1577 static int moonbr_io_wait(lua_State *L) {
jbe@205	1578 return moonbr_io_wait_impl(L, 0);
jbe@205	1579 }
jbe@205	1580
jbe@205	1581 static int moonbr_io_wait_nb(lua_State *L) {
jbe@205	1582 return moonbr_io_wait_impl(L, 1);
jbe@205	1583 }
jbe@205	1584
jbe@205	1585 #if LUA_VERSION_NUM >= 503
jbe@205	1586 static int moonbr_io_wait_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@205	1587 #else
jbe@205	1588 static int moonbr_io_wait_cont(lua_State *L) {
jbe@205	1589 #endif
jbe@205	1590 #if !(LUA_VERSION_NUM >= 503)
jbe@205	1591 int ctx = 0;
jbe@205	1592 lua_getctx(L, &ctx);
jbe@205	1593 #endif
jbe@205	1594 while (1) {
jbe@205	1595 lua_pushcfunction(L, moonbr_io_wait_nb);
jbe@205	1596 lua_pushvalue(L, 1);
jbe@205	1597 lua_call(L, 1, 1);
jbe@205	1598 if (!lua_isnil(L, -1)) break;
jbe@205	1599 lua_pushvalue(L, 2);
jbe@205	1600 lua_callk(L, 0, 0, ctx, moonbr_io_wait_cont);
jbe@205	1601 }
jbe@205	1602 return 1;
jbe@205	1603 }
jbe@205	1604
jbe@205	1605 static int moonbr_io_wait_call(lua_State *L) {
jbe@205	1606 lua_settop(L, 2);
jbe@205	1607 #if LUA_VERSION_NUM >= 503
jbe@205	1608 return moonbr_io_wait_cont(L, 0, 0);
jbe@205	1609 #else
jbe@205	1610 return moonbr_io_wait_cont(L);
jbe@205	1611 #endif
jbe@205	1612 }
jbe@205	1613
jbe@205	1614 moonbr_io_yield_wrapper(moonbr_io_wait_yield, moonbr_io_wait_call);
jbe@205	1615
jbe@266	1616 static void moonbr_io_signalhandler(int sig) {
jbe@266	1617 int errno2 = errno;
jbe@278	1618 char buf[1] = {'.'};
jbe@278	1619 write(moonbr_io_signalfd_write(sig), buf, 1);
jbe@266	1620 errno = errno2;
jbe@266	1621 }
jbe@266	1622
jbe@266	1623 static int moonbr_io_signalsocket(lua_State *L) {
jbe@278	1624 int sig, fd;
jbe@278	1625 if (lua_type(L, 1) == LUA_TSTRING) {
jbe@278	1626 lua_getfield(L, LUA_REGISTRYINDEX, MOONBR_IO_SIGNALS_REGKEY);
jbe@278	1627 lua_pushvalue(L, 1);
jbe@278	1628 lua_gettable(L, -2);
jbe@278	1629 sig = lua_tointeger(L, -1);
jbe@278	1630 if (!sig) {
jbe@278	1631 lua_pushvalue(L, 1);
jbe@278	1632 luaL_error(L, "Unknown signal \"%s\"", lua_tostring(L, 1));
jbe@266	1633 }
jbe@278	1634 } else {
jbe@278	1635 sig = luaL_checkinteger(L, 1);
jbe@266	1636 }
jbe@278	1637 if (sig < 1 \|\| sig > MOONBR_IO_MAXSIGNUM) {
jbe@278	1638 luaL_error(L, "Signal number %i out of range", sig);
jbe@278	1639 }
jbe@278	1640 if (moonbr_io_signalfd_read(sig) < 0) {
jbe@278	1641 if (socketpair(PF_LOCAL, SOCK_STREAM \| SOCK_CLOEXEC, 0, moonbr_io_signalfds+2*sig)) {
jbe@278	1642 luaL_error(L, "Could not create socket pair for signal queueing");
jbe@271	1643 }
jbe@266	1644 errno = 0;
jbe@266	1645 signal(sig, moonbr_io_signalhandler);
jbe@278	1646 if (errno) luaL_error(L, "Could not install signal handler (invalid signal number %i?)", sig);
jbe@266	1647 }
jbe@278	1648 fd = dup(moonbr_io_signalfd_read(sig));
jbe@278	1649 if (fd < 0) luaL_error(L, "Could not create duplicated file descriptor for signal socket");
jbe@278	1650 moonbr_io_pushhandle(L, fd);
jbe@266	1651 return 1;
jbe@266	1652 }
jbe@266	1653
jbe@266	1654 static int moonbr_io_getpid(lua_State *L) {
jbe@266	1655 lua_pushinteger(L, getpid());
jbe@266	1656 return 1;
jbe@266	1657 }
jbe@266	1658
jbe@250	1659 #ifdef MOONBR_IO_USE_TLS
jbe@258	1660
jbe@250	1661 #define moonbr_io_poll_tls() \
jbe@250	1662 if (!handle->tlshandshake) { \
jbe@250	1663 lua_pushboolean(L, 1); \
jbe@250	1664 return 1; \
jbe@250	1665 } \
jbe@250	1666 if (handle->tlshandshake == TLS_WANT_POLLIN) { \
jbe@250	1667 if (fd < 0) { \
jbe@250	1668 lua_pushboolean(L, 1); \
jbe@250	1669 return 1; \
jbe@250	1670 } \
jbe@250	1671 FD_SET(fd, &readfds); \
jbe@250	1672 if (fd+1 > nfds) nfds = fd+1; \
jbe@250	1673 continue; \
jbe@250	1674 } \
jbe@250	1675 if (handle->tlshandshake == TLS_WANT_POLLOUT) { \
jbe@250	1676 if (fd < 0) { \
jbe@250	1677 lua_pushboolean(L, 1); \
jbe@250	1678 return 1; \
jbe@250	1679 } \
jbe@250	1680 FD_SET(fd, &writefds); \
jbe@250	1681 if (fd+1 > nfds) nfds = fd+1; \
jbe@250	1682 continue; \
jbe@250	1683 } \
jbe@250	1684 while (0)
jbe@258	1685
jbe@258	1686 #endif /* MOONBR_IO_USE_TLS */
jbe@250	1687
jbe@106	1688 static int moonbr_io_poll(lua_State *L) {
jbe@106	1689 moonbr_io_handle_t *handle;
jbe@108	1690 moonbr_io_listener_t *listener;
jbe@106	1691 int fd, isnum;
jbe@106	1692 int nfds = 0;
jbe@106	1693 fd_set readfds, writefds, exceptfds;
jbe@106	1694 struct timeval timeout = {0, };
jbe@106	1695 int status;
jbe@106	1696 FD_ZERO(&readfds);
jbe@106	1697 FD_ZERO(&writefds);
jbe@106	1698 FD_ZERO(&exceptfds);
jbe@106	1699 if (!lua_isnoneornil(L, 1)) {
jbe@106	1700 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106	1701 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106	1702 if (lua_toboolean(L, -1)) {
jbe@106	1703 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106	1704 if (handle) {
jbe@109	1705 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106	1706 fd = handle->fd;
jbe@247	1707 #if MOONBR_IO_USE_TLS
jbe@250	1708 moonbr_io_poll_tls();
jbe@247	1709 #endif
jbe@122	1710 if (
jbe@122	1711 fd < 0 \|\| /* fake EOF to simulate shutdown if fd < 0 */
jbe@122	1712 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122	1713 ) {
jbe@109	1714 lua_pushboolean(L, 1);
jbe@109	1715 return 1;
jbe@109	1716 }
jbe@106	1717 } else {
jbe@108	1718 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108	1719 if (listener) {
jbe@108	1720 fd = listener->fd;
jbe@108	1721 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108	1722 } else {
jbe@108	1723 fd = lua_tointegerx(L, -2, &isnum);
jbe@108	1724 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108	1725 }
jbe@106	1726 }
jbe@138	1727 if (fd < 0 \|\| fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106	1728 FD_SET(fd, &readfds);
jbe@106	1729 if (fd+1 > nfds) nfds = fd+1;
jbe@106	1730 }
jbe@106	1731 }
jbe@106	1732 }
jbe@106	1733 if (!lua_isnoneornil(L, 2)) {
jbe@106	1734 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106	1735 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106	1736 if (lua_toboolean(L, -1)) {
jbe@106	1737 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106	1738 if (handle) {
jbe@109	1739 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109	1740 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106	1741 fd = handle->fd;
jbe@247	1742 #if MOONBR_IO_USE_TLS
jbe@250	1743 moonbr_io_poll_tls();
jbe@247	1744 #endif
jbe@106	1745 } else {
jbe@108	1746 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109	1747 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109	1748 fd = lua_tointegerx(L, -2, &isnum);
jbe@109	1749 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106	1750 }
jbe@138	1751 if (fd < 0 \|\| fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106	1752 FD_SET(fd, &writefds);
jbe@106	1753 if (fd+1 > nfds) nfds = fd+1;
jbe@106	1754 }
jbe@106	1755 }
jbe@106	1756 }
jbe@106	1757 if (!lua_isnoneornil(L, 3)) {
jbe@106	1758 lua_Number n;
jbe@106	1759 n = lua_tonumberx(L, 3, &isnum);
jbe@146	1760 if (isnum && n<0) {
jbe@146	1761 lua_pushboolean(L, 0);
jbe@146	1762 lua_pushliteral(L, "Negative timeout");
jbe@146	1763 return 2;
jbe@146	1764 } else if (isnum && n>=0 && n<100000000) {
jbe@106	1765 timeout.tv_sec = n;
jbe@106	1766 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106	1767 } else {
jbe@106	1768 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106	1769 }
jbe@106	1770 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106	1771 } else {
jbe@106	1772 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106	1773 }
jbe@106	1774 if (status == -1) {
jbe@106	1775 if (errno == EINTR) {
jbe@266	1776 lua_pushboolean(L, 1);
jbe@266	1777 return 1;
jbe@106	1778 } else {
jbe@257	1779 moonbr_io_prepare_errmsg();
jbe@106	1780 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106	1781 }
jbe@106	1782 } else if (status == 0) {
jbe@106	1783 lua_pushboolean(L, 0);
jbe@106	1784 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106	1785 return 2;
jbe@106	1786 } else {
jbe@106	1787 lua_pushboolean(L, 1);
jbe@106	1788 return 1;
jbe@106	1789 }
jbe@106	1790 }
jbe@106	1791
jbe@115	1792 static int moonbr_io_timeref(lua_State *L) {
jbe@115	1793 lua_Number sub;
jbe@115	1794 struct timespec tp;
jbe@115	1795 sub = luaL_optnumber(L, 1, 0);
jbe@115	1796 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115	1797 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115	1798 }
jbe@115	1799 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115	1800 return 1;
jbe@115	1801 }
jbe@115	1802
jbe@243	1803 #ifdef MOONBR_IO_USE_TLS
jbe@243	1804
jbe@243	1805 #define moonbr_io_tlsconf_string(name, field, func) \
jbe@243	1806 /* NOTE: use valuetype = lua_getfield(...) for LUA_VERSION_NUM >= 503 */ \
jbe@243	1807 lua_getfield(L, 1, (field)); \
jbe@243	1808 valuetype = lua_type(L, -1); \
jbe@243	1809 if (valuetype != LUA_TNIL) { \
jbe@243	1810 luaL_argcheck(L, valuetype == LUA_TSTRING, 1, "field \"" field "\" is not a string"); \
jbe@243	1811 value = lua_tostring(L, -1); \
jbe@252	1812 if (func(tlsconf->config, value)) { \
jbe@243	1813 lua_pushnil(L); \
jbe@243	1814 lua_pushfstring(L, "Could not set " name " \"%s\"", value); \
jbe@243	1815 return 2; \
jbe@243	1816 } \
jbe@243	1817 } \
jbe@243	1818 lua_pop(L, 1);
jbe@243	1819
jbe@243	1820 #define moonbr_io_tlsconf_binary(name, field, func) \
jbe@243	1821 /* NOTE: use valuetype = lua_getfield(...) for LUA_VERSION_NUM >= 503 */ \
jbe@243	1822 lua_getfield(L, 1, (field)); \
jbe@243	1823 valuetype = lua_type(L, -1); \
jbe@243	1824 if (valuetype != LUA_TNIL) { \
jbe@243	1825 luaL_argcheck(L, valuetype == LUA_TSTRING, 1, "field \"" field "\" is not a string"); \
jbe@243	1826 value = lua_tolstring(L, -1, &valuelen); \
jbe@252	1827 if (func(tlsconf->config, (void *)value, valuelen)) { \
jbe@243	1828 lua_pushnil(L); \
jbe@243	1829 lua_pushliteral(L, "Could not set " name); \
jbe@243	1830 return 2; \
jbe@243	1831 } \
jbe@243	1832 } \
jbe@243	1833 lua_pop(L, 1);
jbe@243	1834
jbe@243	1835 static int moonbr_io_tlsconf(lua_State *L) {
jbe@252	1836 moonbr_io_tlsconf_t *tlsconf;
jbe@243	1837 int valuetype;
jbe@243	1838 const char *value;
jbe@243	1839 size_t valuelen;
jbe@243	1840 luaL_checktype(L, 1, LUA_TTABLE);
jbe@252	1841 tlsconf = lua_newuserdata(L, sizeof(moonbr_io_tlsconf_t));
jbe@252	1842 tlsconf->config = tls_config_new();
jbe@252	1843 if (!tlsconf->config) {
jbe@243	1844 return luaL_error(L, "Could not allocate memory for TLS configuration");
jbe@243	1845 }
jbe@243	1846 luaL_setmetatable(L, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@245	1847 lua_getfield(L, 1, "mode");
jbe@252	1848 value = lua_tostring(L, -1);
jbe@252	1849 if (value && !strcmp(value, "server")) tlsconf->server = 1;
jbe@252	1850 else if (value && !strcmp(value, "client")) tlsconf->server = 0;
jbe@252	1851 else luaL_argcheck(L, 0, 1, "field \"mode\" must be set to \"server\" or \"client\"");
jbe@245	1852 lua_pop(L, 1);
jbe@243	1853 moonbr_io_tlsconf_string("CA file", "ca_file", tls_config_set_ca_file);
jbe@243	1854 moonbr_io_tlsconf_string("CA path", "ca_path", tls_config_set_ca_path);
jbe@243	1855 moonbr_io_tlsconf_binary("CA", "ca_mem", tls_config_set_ca_mem);
jbe@243	1856 moonbr_io_tlsconf_string("certificate file", "cert_file", tls_config_set_cert_file);
jbe@243	1857 moonbr_io_tlsconf_binary("certificate", "cert_mem", tls_config_set_cert_mem);
jbe@243	1858 moonbr_io_tlsconf_string("key file", "key_file", tls_config_set_key_file);
jbe@243	1859 moonbr_io_tlsconf_binary("key", "key_mem", tls_config_set_key_mem);
jbe@245	1860 #if LUA_VERSION_NUM >= 503
jbe@245	1861 valuetype = lua_getfield(L, 1, "verify_client");
jbe@245	1862 #else
jbe@244	1863 lua_getfield(L, 1, "verify_client");
jbe@245	1864 #endif
jbe@244	1865 if (lua_toboolean(L, -1)) {
jbe@252	1866 value = lua_tostring(L, -1);
jbe@252	1867 if (value && !strcmp(value, "required")) {
jbe@252	1868 tls_config_verify_client(tlsconf->config);
jbe@252	1869 } else if (value && !strcmp(value, "optional")) {
jbe@252	1870 tls_config_verify_client_optional(tlsconf->config);
jbe@244	1871 } else {
jbe@244	1872 luaL_argcheck(L, 0, 1, "field \"verify_client\" must be set to \"required\", \"optional\", or be false or nil");
jbe@244	1873 }
jbe@244	1874 }
jbe@244	1875 lua_pop(L, 1);
jbe@254	1876 // TODO: configurable legacy support
jbe@254	1877 // tls_config_set_protocols(tlsconf->config, TLS_PROTOCOLS_ALL);
jbe@254	1878 // tls_config_set_ciphers(tlsconf->config, "legacy");
jbe@243	1879 return 1;
jbe@243	1880 }
jbe@243	1881
jbe@252	1882 static int moonbr_io_tlsconfgc(lua_State *L) {
jbe@252	1883 moonbr_io_tlsconf_t *tlsconf;
jbe@243	1884 tlsconf = luaL_checkudata(L, 1, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@252	1885 if (tlsconf->config) tls_config_free(tlsconf->config);
jbe@252	1886 tlsconf->config = NULL;
jbe@243	1887 return 0;
jbe@243	1888 }
jbe@243	1889
jbe@246	1890 static int moonbr_io_starttls(lua_State *L) {
jbe@246	1891 moonbr_io_handle_t *handle;
jbe@252	1892 moonbr_io_tlsconf_t *tlsconf;
jbe@246	1893 const char *servername;
jbe@246	1894 struct tls tls, tls2;
jbe@246	1895 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@246	1896 if (lua_type(L, 2) == LUA_TTABLE) {
jbe@246	1897 lua_pushcfunction(L, moonbr_io_tlsconf);
jbe@246	1898 lua_pushvalue(L, 2);
jbe@246	1899 lua_call(L, 1, 2);
jbe@246	1900 if (lua_isnil(L, -2)) return 2;
jbe@246	1901 lua_pop(L, 1);
jbe@246	1902 lua_replace(L, 2);
jbe@246	1903 }
jbe@246	1904 tlsconf = luaL_checkudata(L, 2, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@246	1905 if (handle->closed) return luaL_error(L, "Attempt to start TLS on a closed I/O handle");
jbe@246	1906 if (handle->finished) return luaL_error(L, "Attempt to start TLS on a finished I/O handle");
jbe@247	1907 if (handle->tls) return luaL_error(L, "Attempt to start TLS twice");
jbe@246	1908 if (handle->readbufin \|\| handle->writebufin) {
jbe@246	1909 return luaL_error(L, "Attempt to start TLS on an I/O handle with non-empty buffers");
jbe@246	1910 }
jbe@252	1911 if (tlsconf->server) tls = tls_server();
jbe@252	1912 else {
jbe@246	1913 servername = luaL_checkstring(L, 3);
jbe@246	1914 tls = tls_client();
jbe@246	1915 }
jbe@246	1916 if (!tls) {
jbe@246	1917 return luaL_error(L, "Could not allocate memory for TLS context");
jbe@246	1918 }
jbe@252	1919 if (tls_configure(tls, tlsconf->config)) goto moonbr_io_starttls_error;
jbe@252	1920 if (tlsconf->server) {
jbe@246	1921 if (tls_accept_socket(tls, &tls2, handle->fd)) goto moonbr_io_starttls_error;
jbe@246	1922 handle->servertls = tls;
jbe@246	1923 handle->tls = tls2;
jbe@246	1924 } else {
jbe@246	1925 if (tls_connect_socket(tls, handle->fd, servername)) goto moonbr_io_starttls_error;
jbe@246	1926 handle->tls = tls;
jbe@246	1927 }
jbe@246	1928 lua_settop(L, 1);
jbe@246	1929 return 1;
jbe@246	1930 moonbr_io_starttls_error:
jbe@246	1931 lua_pushnil(L);
jbe@246	1932 lua_pushstring(L, tls_error(tls));
jbe@246	1933 tls_free(tls);
jbe@246	1934 return 2;
jbe@246	1935 }
jbe@246	1936
jbe@258	1937 #endif /* MOONBR_IO_USE_TLS */
jbe@243	1938
jbe@79	1939 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85	1940 {"read", moonbr_io_read},
jbe@85	1941 {"read_nb", moonbr_io_read_nb},
jbe@140	1942 {"read_call", moonbr_io_read_call},
jbe@140	1943 {"read_yield", moonbr_io_read_yield},
jbe@86	1944 {"drain", moonbr_io_drain},
jbe@86	1945 {"drain_nb", moonbr_io_drain_nb},
jbe@144	1946 {"drain_call", moonbr_io_drain_call},
jbe@144	1947 {"drain_yield", moonbr_io_drain_yield},
jbe@80	1948 {"write", moonbr_io_write},
jbe@81	1949 {"write_nb", moonbr_io_write_nb},
jbe@145	1950 {"write_call", moonbr_io_write_call},
jbe@145	1951 {"write_yield", moonbr_io_write_yield},
jbe@80	1952 {"flush", moonbr_io_flush},
jbe@81	1953 {"flush_nb", moonbr_io_flush_nb},
jbe@145	1954 {"flush_call", moonbr_io_flush_call},
jbe@145	1955 {"flush_yield", moonbr_io_flush_yield},
jbe@88	1956 {"finish", moonbr_io_finish},
jbe@87	1957 {"close", moonbr_io_close},
jbe@85	1958 {"reset", moonbr_io_reset},
jbe@246	1959 #ifdef MOONBR_IO_USE_TLS
jbe@246	1960 {"starttls", moonbr_io_starttls},
jbe@246	1961 #endif
jbe@79	1962 {NULL, NULL}
jbe@79	1963 };
jbe@79	1964
jbe@79	1965 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79	1966 {"__index", moonbr_io_handleindex},
jbe@79	1967 {"__newindex", moonbr_io_handlenewindex},
jbe@108	1968 {"__gc", moonbr_io_handlegc},
jbe@108	1969 {NULL, NULL}
jbe@108	1970 };
jbe@108	1971
jbe@108	1972 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108	1973 {"accept", moonbr_io_accept},
jbe@108	1974 {"accept_nb", moonbr_io_accept_nb},
jbe@108	1975 {"close", moonbr_io_unlisten},
jbe@108	1976 {NULL, NULL}
jbe@108	1977 };
jbe@108	1978
jbe@108	1979 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108	1980 {"__gc", moonbr_io_listenergc},
jbe@79	1981 {NULL, NULL}
jbe@79	1982 };
jbe@79	1983
jbe@205	1984 static const struct luaL_Reg moonbr_io_child_methods[] = {
jbe@205	1985 {"kill", moonbr_io_kill},
jbe@205	1986 {"wait", moonbr_io_wait},
jbe@205	1987 {"wait_nb", moonbr_io_wait_nb},
jbe@205	1988 {"wait_call", moonbr_io_wait_call},
jbe@205	1989 {"wait_yield", moonbr_io_wait_yield},
jbe@205	1990 {NULL, NULL}
jbe@205	1991 };
jbe@205	1992
jbe@205	1993 static const struct luaL_Reg moonbr_io_child_metamethods[] = {
jbe@205	1994 {"__index", moonbr_io_childindex},
jbe@205	1995 {"__newindex", moonbr_io_childnewindex},
jbe@205	1996 {"__gc", moonbr_io_childgc},
jbe@205	1997 {NULL, NULL}
jbe@205	1998 };
jbe@205	1999
jbe@79	2000 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111	2001 {"localconnect", moonbr_io_localconnect},
jbe@111	2002 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98	2003 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99	2004 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112	2005 {"locallisten", moonbr_io_locallisten},
jbe@108	2006 {"tcplisten", moonbr_io_tcplisten},
jbe@205	2007 {"exec", moonbr_io_exec},
jbe@266	2008 {"signalsocket", moonbr_io_signalsocket},
jbe@266	2009 {"getpid", moonbr_io_getpid},
jbe@106	2010 {"poll", moonbr_io_poll},
jbe@115	2011 {"timeref", moonbr_io_timeref},
jbe@243	2012 #ifdef MOONBR_IO_USE_TLS
jbe@243	2013 {"tlsconf", moonbr_io_tlsconf},
jbe@243	2014 #endif
jbe@79	2015 {NULL, NULL}
jbe@79	2016 };
jbe@79	2017
jbe@243	2018 #ifdef MOONBR_IO_USE_TLS
jbe@258	2019
jbe@243	2020 static const struct luaL_Reg moonbr_io_tlsconf_metamethods[] = {
jbe@243	2021 {"__gc", moonbr_io_tlsconfgc},
jbe@243	2022 {NULL, NULL}
jbe@243	2023 };
jbe@258	2024
jbe@258	2025 #endif /* MOONBR_IO_USE_TLS */
jbe@243	2026
jbe@79	2027 int luaopen_moonbridge_io(lua_State *L) {
jbe@79	2028
jbe@113	2029 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@278	2030 {
jbe@278	2031 int i;
jbe@278	2032 for (i=0; i<=MOONBR_IO_MAXSIGNUM; i++) {
jbe@278	2033 moonbr_io_signalfd_read(i) = -1;
jbe@278	2034 moonbr_io_signalfd_write(i) = -1;
jbe@278	2035 }
jbe@278	2036 }
jbe@113	2037
jbe@80	2038 lua_newtable(L); // module
jbe@80	2039
jbe@79	2040 lua_newtable(L); // public metatable
jbe@79	2041 lua_newtable(L); // handle methods
jbe@79	2042 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80	2043 lua_pushvalue(L, -1);
jbe@146	2044 lua_setfield(L, -4, "handle_pt");
jbe@79	2045 lua_setfield(L, -2, "__index");
jbe@79	2046 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79	2047
jbe@79	2048 lua_newtable(L); // handle metatable
jbe@79	2049 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@146	2050 lua_pushvalue(L, -1);
jbe@146	2051 lua_setfield(L, -3, "handle_mt");
jbe@79	2052 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79	2053
jbe@108	2054 lua_newtable(L); // listener metatable
jbe@108	2055 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108	2056 lua_newtable(L); // listener methods
jbe@108	2057 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108	2058 lua_pushvalue(L, -1);
jbe@146	2059 lua_setfield(L, -4, "listener_pt");
jbe@108	2060 lua_setfield(L, -2, "__index");
jbe@146	2061 lua_pushvalue(L, -1);
jbe@146	2062 lua_setfield(L, -3, "listener_mt");
jbe@108	2063 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108	2064
jbe@205	2065 lua_newtable(L); // child methods
jbe@205	2066 luaL_setfuncs(L, moonbr_io_child_methods, 0);
jbe@205	2067 lua_pushvalue(L, -1);
jbe@205	2068 lua_setfield(L, -3, "child_pt");
jbe@205	2069 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205	2070 lua_newtable(L); // child metatable
jbe@205	2071 luaL_setfuncs(L, moonbr_io_child_metamethods, 0);
jbe@205	2072 lua_pushvalue(L, -1);
jbe@205	2073 lua_setfield(L, -3, "child_mt");
jbe@205	2074 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205	2075
jbe@243	2076 #ifdef MOONBR_IO_USE_TLS
jbe@243	2077 if(tls_init()) {
jbe@243	2078 return luaL_error(L, "Could not initialize TLS library");
jbe@243	2079 }
jbe@243	2080 lua_newtable(L); // tlsconf metatable
jbe@243	2081 luaL_setfuncs(L, moonbr_io_tlsconf_metamethods, 0);
jbe@243	2082 lua_pushvalue(L, -1);
jbe@243	2083 lua_setfield(L, -3, "tlsconf_mt");
jbe@243	2084 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@243	2085 #endif
jbe@243	2086
jbe@205	2087 moonbr_io_pushhandle(L, 0);
jbe@205	2088 lua_setfield(L, -2, "stdin");
jbe@205	2089 moonbr_io_pushhandle(L, 1);
jbe@205	2090 lua_setfield(L, -2, "stdout");
jbe@205	2091 moonbr_io_pushhandle(L, 2);
jbe@205	2092 lua_setfield(L, -2, "stderr");
jbe@270	2093
jbe@270	2094 lua_newtable(L); // signal numbers
jbe@270	2095 lua_pushinteger(L, SIGHUP); lua_setfield(L, -2, "HUP");
jbe@270	2096 lua_pushinteger(L, SIGINT); lua_setfield(L, -2, "INT");
jbe@270	2097 lua_pushinteger(L, SIGQUIT); lua_setfield(L, -2, "QUIT");
jbe@270	2098 lua_pushinteger(L, SIGABRT); lua_setfield(L, -2, "ABRT");
jbe@270	2099 lua_pushinteger(L, SIGPIPE); lua_setfield(L, -2, "PIPE");
jbe@270	2100 lua_pushinteger(L, SIGALRM); lua_setfield(L, -2, "ALRM");
jbe@270	2101 lua_pushinteger(L, SIGTERM); lua_setfield(L, -2, "TERM");
jbe@270	2102 lua_pushinteger(L, SIGTSTP); lua_setfield(L, -2, "TSTP");
jbe@270	2103 lua_pushinteger(L, SIGCONT); lua_setfield(L, -2, "CONT");
jbe@270	2104 lua_pushinteger(L, SIGVTALRM); lua_setfield(L, -2, "VTALRM");
jbe@272	2105 #ifdef SIGINFO
jbe@270	2106 lua_pushinteger(L, SIGINFO); lua_setfield(L, -2, "INFO");
jbe@272	2107 #endif
jbe@270	2108 lua_pushinteger(L, SIGUSR1); lua_setfield(L, -2, "USR1");
jbe@270	2109 lua_pushinteger(L, SIGUSR2); lua_setfield(L, -2, "USR2");
jbe@271	2110 lua_pushvalue(L, -1);
jbe@271	2111 lua_setfield(L, -3, "signals");
jbe@271	2112 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_SIGNALS_REGKEY);
jbe@205	2113
jbe@79	2114 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79	2115 return 1;
jbe@79	2116
jbe@79	2117 }
jbe@79	2118