jbe@79: 
jbe@79: #include <stdlib.h>
jbe@79: #include <unistd.h>
jbe@79: #include <stdint.h>
jbe@79: #include <errno.h>
jbe@79: #include <string.h>
jbe@79: #include <sys/socket.h>
jbe@79: #include <sys/select.h>
jbe@81: #include <fcntl.h>
jbe@95: #include <netinet/in.h>
jbe@95: #include <netinet/tcp.h>
jbe@98: #include <sys/types.h>
jbe@98: #include <netdb.h>
jbe@79: 
jbe@79: #include <lua.h>
jbe@79: #include <lauxlib.h>
jbe@79: #include <lualib.h>
jbe@79: 
jbe@80: #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85: #define MOONBR_IO_READBUFLEN 4096
jbe@80: #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80: 
jbe@80: #define moonbr_io_errmsg() \
jbe@80:   char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80:   strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80: 
jbe@79: #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79: #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@79: 
jbe@79: typedef struct {
jbe@79:   int fd;
jbe@95:   int isnetwork;
jbe@94:   int finished;
jbe@94:   int closed;
jbe@81:   int nonblocking;
jbe@95:   int nopush;
jbe@85:   int readerr;
jbe@85:   int readbufcnt;
jbe@81:   int writeerr;
jbe@83:   size_t writeleft;
jbe@83: #if LUA_VERSION_NUM >= 503
jbe@83:   lua_Integer writeqin;
jbe@83:   lua_Integer writeqout;
jbe@83: #else
jbe@83:   int writeqin;
jbe@83:   int writeqout;
jbe@83: #endif
jbe@83:   size_t writeqoff;
jbe@81:   int writebufcnt;
jbe@85:   char readbuf[MOONBR_IO_READBUFLEN];
jbe@80:   char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79: } moonbr_io_handle_t;
jbe@79: 
jbe@81: static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95:   int flags;
jbe@95:   if (handle->nonblocking == nonblocking) return;
jbe@95:   flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95:   if (flags == -1) {
jbe@95:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81:   }
jbe@95:   if (nonblocking) flags |= O_NONBLOCK;
jbe@95:   else flags &= ~O_NONBLOCK;
jbe@95:   if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95:   }
jbe@95:   handle->nonblocking = nonblocking;
jbe@81: }
jbe@81: 
jbe@87: static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87:   struct linger lingerval = { 0, };
jbe@95:   if (!handle->isnetwork) return;
jbe@87:   if (timeout >= 0) {
jbe@87:     lingerval.l_onoff = 1;
jbe@87:     lingerval.l_linger = timeout;
jbe@87:   }
jbe@87:   if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87:   }
jbe@87: }
jbe@87: 
jbe@95: static void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96: #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@95:   if (!handle->isnetwork || handle->nopush == nopush) return;
jbe@96: #if defined(TCP_NOPUSH)
jbe@96:   if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@96:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@96:     luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96:   }
jbe@96: #elif defined(TCP_CORK)
jbe@95:   if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@95:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@95:   }
jbe@95: #endif
jbe@95:   handle->nopush = nopush;
jbe@96: #else
jbe@96: #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96: #endif
jbe@95: }
jbe@95: 
jbe@86: static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85:   moonbr_io_handle_t *handle;
jbe@85:   lua_Integer maxread;
jbe@85:   const char *terminatorstr;
jbe@85:   size_t terminatorlen;
jbe@85:   char terminator;
jbe@85:   luaL_Buffer luabuf;
jbe@85:   size_t luabufcnt = 0;
jbe@86:   int endcnt;
jbe@85:   char *terminatorpos;
jbe@85:   ssize_t result;
jbe@85:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85:   maxread = luaL_optinteger(L, 2, 0);
jbe@85:   terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85:   if (terminatorlen) {
jbe@85:     luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85:     terminator = terminatorstr[0];
jbe@85:   }
jbe@86:   lua_settop(L, 1);  /* return handle on drain, terminator string may be garbage collected */
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@94:   if (handle->fd < 0) goto moonbr_io_read_impl_eof;  /* fake EOF to simulate shutdown */
jbe@85:   if (handle->readerr) {
jbe@85:     lua_pushnil(L);
jbe@85:     lua_pushliteral(L, "Previous read error");
jbe@85:     return 2;
jbe@85:   }
jbe@85:   moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86:   if (!drain) luaL_buffinit(L, &luabuf);
jbe@85:   while (1) {
jbe@86:     endcnt = -1;
jbe@85:     if (maxread > 0 && handle->readbufcnt >= maxread - luabufcnt) {
jbe@86:       endcnt = maxread - luabufcnt;
jbe@85:     } else if (terminatorlen) {
jbe@85:       terminatorpos = memchr(handle->readbuf, terminator, handle->readbufcnt);
jbe@86:       if (terminatorpos) endcnt = 1 + (terminatorpos - handle->readbuf);
jbe@85:     }
jbe@86:     if (endcnt >= 0) {
jbe@86:       if (!drain) {
jbe@86:         luaL_addlstring(&luabuf, handle->readbuf, endcnt);
jbe@86:         luaL_pushresult(&luabuf);
jbe@90:       } else {
jbe@90:         luabufcnt += handle->readbufcnt;
jbe@90:         lua_pushinteger(L, luabufcnt);
jbe@86:       }
jbe@86:       handle->readbufcnt -= endcnt;
jbe@86:       memmove(handle->readbuf, handle->readbuf + endcnt, handle->readbufcnt);
jbe@85:       return 1;
jbe@85:     }
jbe@86:     if (!drain) luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@85:     luabufcnt += handle->readbufcnt;
jbe@85:     handle->readbufcnt = 0;
jbe@85:     do {
jbe@85:       result = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@85:     } while (result < 0 && (errno == EINTR));
jbe@85:     if (result == 0 || (nonblocking && result < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))) break;
jbe@85:     if (result < 0) {
jbe@85:       moonbr_io_errmsg();
jbe@85:       handle->readerr = 1;
jbe@85:       lua_pushnil(L);
jbe@85:       lua_pushstring(L, errmsg);
jbe@85:       return 2;
jbe@85:     }
jbe@85:     handle->readbufcnt += result;
jbe@85:   }
jbe@86:   if (!drain) {
jbe@86:     luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@86:     luaL_pushresult(&luabuf);
jbe@86:   }
jbe@90:   luabufcnt += handle->readbufcnt;
jbe@85:   handle->readbufcnt = 0;
jbe@90:   if (!drain) {
jbe@90:     if (!luabufcnt && result == 0) {
jbe@94:       moonbr_io_read_impl_eof:
jbe@90:       lua_pushboolean(L, 0);
jbe@90:       lua_pushliteral(L, "End of file");
jbe@90:       return 2;
jbe@90:     }
jbe@90:   } else {
jbe@90:     if (!luabufcnt && result == 0) lua_pushboolean(L, 1);
jbe@90:     else lua_pushboolean(L, luabufcnt);
jbe@90:   }
jbe@85:   return 1;
jbe@85: }
jbe@85: 
jbe@85: static int moonbr_io_read(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 0, 0);
jbe@85: }
jbe@85: 
jbe@85: static int moonbr_io_read_nb(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 1, 0);
jbe@86: }
jbe@86: 
jbe@86: static int moonbr_io_drain(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 0, 1);
jbe@86: }
jbe@86: 
jbe@86: static int moonbr_io_drain_nb(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 1, 1);
jbe@85: }
jbe@85: 
jbe@81: static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80:   moonbr_io_handle_t *handle;
jbe@80:   int i, top;
jbe@80:   const char *str;
jbe@92:   size_t strlen;
jbe@80:   size_t written;
jbe@80:   ssize_t result;
jbe@80:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94:   if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81:   if (handle->writeerr) {
jbe@80:     lua_pushnil(L);
jbe@80:     lua_pushliteral(L, "Previous write error");
jbe@80:     return 2;
jbe@80:   }
jbe@81:   moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84:   top = lua_gettop(L);
jbe@81:   lua_getuservalue(L, 1);
jbe@81:   lua_getfield(L, -1, "writebuf");
jbe@84:   for (i=2; i<=top; i++) {
jbe@84:     luaL_checklstring(L, i, &strlen);
jbe@84:     lua_pushvalue(L, i);
jbe@84:     lua_rawseti(L, -2, handle->writeqin++);
jbe@84:     handle->writeleft += strlen;
jbe@81:   }
jbe@83:   while (handle->writeqout != handle->writeqin) {
jbe@83:     lua_rawgeti(L, -1, handle->writeqout);
jbe@81:     str = lua_tolstring(L, -1, &strlen);
jbe@92:     while (handle->writeqoff < strlen) {
jbe@96:       if (strlen - handle->writeqoff <= MOONBR_IO_WRITEBUFLEN - handle->writebufcnt) {
jbe@92:         memcpy(handle->writebuf + handle->writebufcnt, str + handle->writeqoff, strlen - handle->writeqoff);
jbe@92:         handle->writebufcnt += strlen - handle->writeqoff;
jbe@80:         break;
jbe@80:       } else {
jbe@97:         moonbr_io_handle_set_nopush(L, handle, 1);
jbe@80:         written = 0;
jbe@92:         memcpy(handle->writebuf + handle->writebufcnt, str + handle->writeqoff, MOONBR_IO_WRITEBUFLEN - handle->writebufcnt);
jbe@92:         handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufcnt;
jbe@80:         while (written < MOONBR_IO_WRITEBUFLEN) {
jbe@80:           result = write(handle->fd, handle->writebuf + written, MOONBR_IO_WRITEBUFLEN - written);
jbe@80:           if (result < 0) {
jbe@81:             if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81:               if (written) {
jbe@81:                 handle->writebufcnt -= written;
jbe@81:                 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
jbe@92:                 goto moonbr_io_write_impl_continue;
jbe@81:               }
jbe@81:               goto moonbr_io_write_impl_block;
jbe@81:             } else if (errno != EINTR) {
jbe@80:               moonbr_io_errmsg();
jbe@81:               handle->writeerr = 1;
jbe@80:               lua_pushnil(L);
jbe@80:               lua_pushstring(L, errmsg);
jbe@80:               return 2;
jbe@80:             }
jbe@80:           }
jbe@92:           written += result;
jbe@92:           handle->writeleft -= result;
jbe@80:         }
jbe@81:         handle->writebufcnt = 0;
jbe@80:       }
jbe@92:       moonbr_io_write_impl_continue:;
jbe@80:     }
jbe@81:     handle->writeqoff = 0;
jbe@81:     lua_pop(L, 1);
jbe@81:     lua_pushnil(L);
jbe@83:     lua_rawseti(L, -2, handle->writeqout++);
jbe@80:   }
jbe@81:   if (flush) {
jbe@97:     moonbr_io_handle_set_nopush(L, handle, 0);
jbe@81:     written = 0;
jbe@81:     while (written < handle->writebufcnt) {
jbe@81:       result = write(handle->fd, handle->writebuf + written, handle->writebufcnt - written);
jbe@81:       if (result < 0) {
jbe@81:         if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81:           if (written) {
jbe@81:             handle->writebufcnt -= written;
jbe@81:             memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
jbe@81:           }
jbe@81:           goto moonbr_io_write_impl_block;
jbe@81:         } else if (errno != EINTR) {
jbe@81:           moonbr_io_errmsg();
jbe@81:           handle->writeerr = -1;
jbe@81:           lua_pushnil(L);
jbe@81:           lua_pushstring(L, errmsg);
jbe@81:           return 2;
jbe@81:         }
jbe@81:       } else {
jbe@81:         written += result;
jbe@81:         handle->writeleft -= result;
jbe@81:       }
jbe@81:     }
jbe@81:     handle->writebufcnt = 0;
jbe@82:     if (nonblocking) lua_pushinteger(L, 0);
jbe@81:   } else {
jbe@91:     if (nonblocking) lua_pushinteger(L, handle->writeleft);
jbe@81:   }
jbe@82:   if (!nonblocking) lua_pushvalue(L, 1);
jbe@80:   return 1;
jbe@81:   moonbr_io_write_impl_block:
jbe@91:   lua_pushinteger(L, handle->writeleft);
jbe@81:   return 1;
jbe@81: }
jbe@81: 
jbe@81: static int moonbr_io_write(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 0, 0);
jbe@81: }
jbe@81: 
jbe@81: static int moonbr_io_write_nb(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 1, 0);
jbe@80: }
jbe@80: 
jbe@80: static int moonbr_io_flush(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 0, 1);
jbe@81: }
jbe@81: 
jbe@81: static int moonbr_io_flush_nb(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 1, 1);
jbe@80: }
jbe@80: 
jbe@88: static int moonbr_io_finish(lua_State *L) {
jbe@88:   moonbr_io_handle_t *handle;
jbe@88:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94:   if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94:   if (handle->writeleft) {
jbe@94:     lua_pushcfunction(L, moonbr_io_flush);
jbe@94:     lua_pushvalue(L, 1);
jbe@94:     lua_call(L, 1, 2);
jbe@94:     if (!lua_toboolean(L, -2)) {
jbe@94:       handle->finished = 1;
jbe@94:       return 2;
jbe@88:     }
jbe@94:   }
jbe@94:   handle->finished = 1;
jbe@95:   if (handle->isnetwork) {
jbe@88:     if (shutdown(handle->fd, SHUT_WR)) {
jbe@88:       moonbr_io_errmsg();
jbe@88:       lua_pushnil(L);
jbe@88:       lua_pushstring(L, errmsg);
jbe@88:       return 2;
jbe@88:     }
jbe@94:   } else {
jbe@94:     if (close(handle->fd)) {
jbe@94:       moonbr_io_errmsg();
jbe@94:       handle->fd = -1;
jbe@94:       lua_pushnil(L);
jbe@94:       lua_pushstring(L, errmsg);
jbe@94:       return 2;
jbe@94:     }
jbe@94:     handle->fd = -1;  /* fake EOF on read */
jbe@88:   }
jbe@88:   lua_pushboolean(L, 1);
jbe@88:   return 1;
jbe@88: }
jbe@88: 
jbe@94: static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83:   moonbr_io_handle_t *handle;
jbe@83:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94:   if (!reset) {
jbe@87:     if (handle->writeleft) {
jbe@87:       lua_pushcfunction(L, moonbr_io_flush);
jbe@87:       lua_pushvalue(L, 1);
jbe@87:       lua_call(L, 1, 2);
jbe@87:       if (!lua_toboolean(L, -2)) {
jbe@87:         close(handle->fd);
jbe@87:         handle->fd = -1;
jbe@87:         return 2;
jbe@87:       }
jbe@83:     }
jbe@94:     moonbr_io_handle_set_linger(L, handle, -1);
jbe@83:   }
jbe@94:   if (handle->fd >= 0) {
jbe@94:     if (close(handle->fd)) {
jbe@94:       moonbr_io_errmsg();
jbe@94:       handle->fd = -1;
jbe@94:       lua_pushnil(L);
jbe@94:       lua_pushstring(L, errmsg);
jbe@94:       return 2;
jbe@94:     }
jbe@83:   }
jbe@83:   handle->fd = -1;
jbe@83:   lua_pushboolean(L, 1);
jbe@83:   return 1;
jbe@84: 
jbe@83: }
jbe@83: 
jbe@94: static int moonbr_io_close(lua_State *L) {
jbe@94:   return moonbr_io_close_impl(L, 0);
jbe@94: }
jbe@94: 
jbe@84: static int moonbr_io_reset(lua_State *L) {
jbe@94:   return moonbr_io_close_impl(L, 1);
jbe@84: }
jbe@84: 
jbe@88: static int moonbr_io_gc(lua_State *L) {
jbe@88:   moonbr_io_handle_t *handle;
jbe@88:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88:   if (handle->fd >= 0) {
jbe@88:     lua_pushcfunction(L, moonbr_io_close);
jbe@88:     lua_pushvalue(L, 1);
jbe@88:     lua_pushinteger(L, 0);
jbe@88:     lua_call(L, 2, 0);
jbe@88:   }
jbe@88:   return 0;
jbe@88: }
jbe@88: 
jbe@100: void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88:   moonbr_io_handle_t *handle;
jbe@88:   handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100:   if (!handle->closed) {
jbe@100:     lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100:     lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100:     lua_call(L, 1, 0);
jbe@88:   }
jbe@88: }
jbe@88: 
jbe@95: void moonbr_io_pushhandle(lua_State *L, int fd, int isnetwork) {
jbe@79:   moonbr_io_handle_t *handle;
jbe@79:   handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79:   handle->fd = fd;
jbe@95:   handle->isnetwork = isnetwork;
jbe@94:   handle->finished = 0;
jbe@94:   handle->closed = 0;
jbe@81:   handle->nonblocking = -1;
jbe@95:   handle->nopush = -1;
jbe@85:   handle->readerr = 0;
jbe@85:   handle->readbufcnt = 0;
jbe@81:   handle->writeerr = 0;
jbe@81:   handle->writeleft = 0;
jbe@83:   handle->writeqin = 0;
jbe@83:   handle->writeqout = 0;
jbe@81:   handle->writeqoff = 0;
jbe@81:   handle->writebufcnt = 0;
jbe@87:   moonbr_io_handle_set_linger(L, handle, 0);
jbe@79:   luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79:   lua_setmetatable(L, -2);
jbe@79:   lua_newtable(L);  // uservalue
jbe@81:   lua_newtable(L);
jbe@81:   lua_setfield(L, -2, "writebuf");
jbe@79:   lua_newtable(L);  // public
jbe@79:   luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79:   lua_setmetatable(L, -2);
jbe@79:   lua_setfield(L, -2, "public");
jbe@79:   lua_setuservalue(L, -2);
jbe@79: }
jbe@79: 
jbe@79: static int moonbr_io_handleindex(lua_State *L) {
jbe@80:   luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79:   lua_getuservalue(L, 1);
jbe@79:   lua_getfield(L, -1, "public");
jbe@79:   lua_pushvalue(L, 2);
jbe@79:   lua_gettable(L, -2);
jbe@79:   return 1;
jbe@79: }
jbe@79: 
jbe@79: static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80:   luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79:   lua_getuservalue(L, 1);
jbe@79:   lua_getfield(L, -1, "public");
jbe@79:   lua_pushvalue(L, 2);
jbe@79:   lua_pushvalue(L, 3);
jbe@79:   lua_settable(L, -3);
jbe@79:   return 0;
jbe@79: }
jbe@79: 
jbe@99: static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98:   const char *host, *port;
jbe@98:   struct addrinfo hints = { 0, };
jbe@98:   struct addrinfo *res, *addrinfo;
jbe@98:   int errcode;
jbe@98:   int sock;
jbe@98:   host = luaL_checkstring(L, 1);
jbe@98:   port = luaL_checkstring(L, 2);
jbe@98:   hints.ai_family = AF_UNSPEC;
jbe@98:   hints.ai_socktype = SOCK_STREAM;
jbe@98:   hints.ai_protocol = IPPROTO_TCP;
jbe@98:   hints.ai_flags = AI_ADDRCONFIG;
jbe@98:   errcode = getaddrinfo(host, port, &hints, &res);
jbe@98:   if (errcode) {
jbe@102:     freeaddrinfo(res);
jbe@98:     if (errcode == EAI_SYSTEM) {
jbe@98:       moonbr_io_errmsg();
jbe@98:       lua_pushnil(L);
jbe@98:       lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98:     } else {
jbe@98:       lua_pushnil(L);
jbe@98:       lua_pushstring(L, gai_strerror(errcode));
jbe@98:     }
jbe@98:     return 2;
jbe@98:   }
jbe@98:   for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98:     if (addrinfo->ai_family == PF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98:   }
jbe@98:   for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@98:     if (addrinfo->ai_family == PF_INET) goto moonbr_io_tcpconnect_found;
jbe@98:   }
jbe@98:   addrinfo = res;
jbe@98:   moonbr_io_tcpconnect_found:
jbe@99:   sock = socket(
jbe@99:     addrinfo->ai_family,
jbe@99:     addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99:     addrinfo->ai_protocol
jbe@99:   );
jbe@102:   freeaddrinfo(res);
jbe@98:   if (sock < 0) {
jbe@98:     moonbr_io_errmsg();
jbe@98:     lua_pushnil(L);
jbe@98:     lua_pushstring(L, errmsg);
jbe@98:   }
jbe@98:   if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@99:     if (!nonblocking && errno == EINTR) {
jbe@99:       moonbr_io_errmsg();
jbe@99:       close(sock);
jbe@99:       lua_pushnil(L);
jbe@99:       lua_pushstring(L, errmsg);
jbe@99:       return 2;
jbe@99:     } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99:       moonbr_io_errmsg();
jbe@99:       lua_pushnil(L);
jbe@99:       lua_pushstring(L, errmsg);
jbe@99:       return 2;
jbe@99:     }
jbe@98:   }
jbe@98:   moonbr_io_pushhandle(L, sock, 1);
jbe@98:   return 1;
jbe@98: }
jbe@98: 
jbe@99: static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99:   return moonbr_io_tcpconnect_impl(L, 0);
jbe@99: }
jbe@99: 
jbe@99: static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99:   return moonbr_io_tcpconnect_impl(L, 1);
jbe@99: }
jbe@99: 
jbe@79: static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85:   {"read", moonbr_io_read},
jbe@85:   {"read_nb", moonbr_io_read_nb},
jbe@86:   {"drain", moonbr_io_drain},
jbe@86:   {"drain_nb", moonbr_io_drain_nb},
jbe@80:   {"write", moonbr_io_write},
jbe@81:   {"write_nb", moonbr_io_write_nb},
jbe@80:   {"flush", moonbr_io_flush},
jbe@81:   {"flush_nb", moonbr_io_flush_nb},
jbe@88:   {"finish", moonbr_io_finish},
jbe@87:   {"close", moonbr_io_close},
jbe@85:   {"reset", moonbr_io_reset},
jbe@79:   {NULL, NULL}
jbe@79: };
jbe@79: 
jbe@79: static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79:   {"__index", moonbr_io_handleindex},
jbe@79:   {"__newindex", moonbr_io_handlenewindex},
jbe@88:   {"__gc", moonbr_io_gc},
jbe@79:   {NULL, NULL}
jbe@79: };
jbe@79: 
jbe@79: static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@98:   {"tcpconnect", moonbr_io_tcpconnect},
jbe@99:   {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@79:   {NULL, NULL}
jbe@79: };
jbe@79: 
jbe@79: int luaopen_moonbridge_io(lua_State *L) {
jbe@79: 
jbe@80:   lua_newtable(L);  // module
jbe@80: 
jbe@79:   lua_newtable(L);  // public metatable
jbe@79:   lua_newtable(L);  // handle methods
jbe@79:   luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80:   lua_pushvalue(L, -1);
jbe@80:   lua_setfield(L, -4, "handle");
jbe@79:   lua_setfield(L, -2, "__index");
jbe@79:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79: 
jbe@79:   lua_newtable(L);  // handle metatable
jbe@79:   luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79: 
jbe@79:   luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79:   return 1;
jbe@79: 
jbe@79: }
jbe@79: