Rework LuCI build system

[project/luci.git] / libs / luci-lib-nixio / src / socket.c

diff --git a/libs/luci-lib-nixio/src/socket.c b/libs/luci-lib-nixio/src/socket.c
new file mode 100644 (file)
index 0000000..17c6afc
--- /dev/null
+++ b/libs/luci-lib-nixio/src/socket.c
@@ -0,0 +1,173 @@
+/*
+ * nixio - Linux I/O library for lua
+ *
+ *   Copyright (C) 2009 Steven Barth <steven@midlink.org>
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "nixio.h"
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+
+/**
+ * create new socket
+ */
+static int nixio_socket(lua_State *L) {
+       const char *domain = luaL_optlstring(L, 1, "", NULL);
+       const char *type   = luaL_optlstring(L, 2, "", NULL);
+       const char *proto  = lua_tolstring(L, 3, NULL);
+
+       nixio_sock *sock = lua_newuserdata(L, sizeof(nixio_sock));
+       if (!sock) {
+               return luaL_error(L, "out of memory");
+       }
+
+       if (!strcmp(domain, "inet")) {
+               sock->domain = AF_INET;
+       } else if (!strcmp(domain, "inet6")) {
+               sock->domain = AF_INET6;
+       } else if (!strcmp(domain, "unix")) {
+               sock->domain = AF_UNIX;
+       /*} else if (!strcmp(domain, "packet")) {
+               sock->domain = AF_PACKET;*/
+       } else {
+               return luaL_argerror(L, 1,
+                "supported values: inet, inet6, unix, packet"
+               );
+       }
+
+       if (!strcmp(type, "stream")) {
+               sock->type = SOCK_STREAM;
+       } else if (!strcmp(type, "dgram")) {
+               sock->type = SOCK_DGRAM;
+       } else if (!strcmp(type, "raw")) {
+               sock->type = SOCK_RAW;
+       } else {
+               return luaL_argerror(L, 2, "supported values: stream, dgram, raw");
+       }
+
+       if (!proto) {
+               sock->protocol = 0;
+       } else if (!strcmp(proto, "icmp")) {
+               sock->protocol = IPPROTO_ICMP;
+       } else if (!strcmp(proto, "icmpv6")) {
+               sock->protocol = IPPROTO_ICMPV6;
+       } else {
+               return luaL_argerror(L, 3, "supported values: [empty], icmp, icmpv6");
+       }
+
+       /* create userdata */
+       luaL_getmetatable(L, NIXIO_META);
+       lua_setmetatable(L, -2);
+
+       sock->fd = socket(sock->domain, sock->type, sock->protocol);
+
+       if (sock->fd < 0) {
+               return nixio__perror_s(L);
+       }
+
+       return 1;
+}
+
+/**
+ * close a socket
+ */
+static int nixio_sock_close(lua_State *L) {
+       nixio_sock *sock = nixio__checksock(L);
+       int sockfd = sock->fd;
+       int res;
+       sock->fd = -1;
+
+       do {
+#ifndef __WINNT__
+               res = close(sockfd);
+#else
+               res = closesocket(sockfd);
+#endif
+       } while (res == -1 && errno == EINTR);
+
+       return nixio__pstatus_s(L, !res);
+}
+
+/**
+ * garbage collector
+ */
+static int nixio_sock__gc(lua_State *L) {
+       nixio_sock *sock = (nixio_sock*)luaL_checkudata(L, 1, NIXIO_META);
+       int res;
+       if (sock && sock->fd != -1) {
+               do {
+#ifndef __WINNT__
+                       res = close(sock->fd);
+#else
+                       res = closesocket(sock->fd);
+#endif
+               } while (res == -1 && errno == EINTR);
+       }
+       return 0;
+}
+
+/**
+ * string representation
+ */
+static int nixio_sock__tostring(lua_State *L) {
+       lua_pushfstring(L, "nixio socket %d", nixio__checksockfd(L));
+       return 1;
+}
+
+/**
+ * shutdown a socket
+ */
+static int nixio_sock_shutdown(lua_State *L) {
+       int sockfd = nixio__checksockfd(L);
+       const char *what = luaL_optlstring(L, 2, "rdwr", NULL);
+       int how;
+
+       if (!strcmp(what, "rdwr") || !strcmp(what, "both")) {
+               how = SHUT_RDWR;
+       } else if (!strcmp(what, "rd") || !strcmp(what, "read")) {
+               how = SHUT_RD;
+       } else if (!strcmp(what, "wr") || !strcmp(what, "write")) {
+               how = SHUT_WR;
+       } else {
+               return luaL_argerror(L, 2, "supported values: both, read, write");
+       }
+
+       return nixio__pstatus_s(L, !shutdown(sockfd, how));
+}
+
+/* module table */
+static const luaL_reg R[] = {
+       {"socket",              nixio_socket},
+       {NULL,                  NULL}
+};
+
+/* object table */
+static const luaL_reg M[] = {
+       {"close",               nixio_sock_close},
+       {"shutdown",    nixio_sock_shutdown},
+       {"__gc",                nixio_sock__gc},
+       {"__tostring",  nixio_sock__tostring},
+       {NULL,                  NULL}
+};
+
+void nixio_open_socket(lua_State *L) {
+       luaL_register(L, NULL, R);
+
+       lua_pushvalue(L, -2);
+       luaL_register(L, NULL, M);
+       lua_pop(L, 1);
+}