--- /dev/null
+/*
+ * 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"
+
+#ifndef __WINNT__
+#include <net/if.h>
+#endif
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#ifndef IPV6_ADD_MEMBERSHIP
+#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
+#endif
+
+#ifndef IPV6_DROP_MEMBERSHIP
+#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
+#endif
+
+static int nixio_sock_fileno(lua_State *L) {
+ lua_pushinteger(L, nixio__checkfd(L, 1));
+ return 1;
+}
+
+/**
+ * setblocking()
+ */
+static int nixio_sock_setblocking(lua_State *L) {
+ int fd = nixio__checkfd(L, 1);
+ luaL_checkany(L, 2);
+ int set = lua_toboolean(L, 2);
+
+#ifndef __WINNT__
+
+ int flags = fcntl(fd, F_GETFL);
+
+ if (flags == -1) {
+ return nixio__perror(L);
+ }
+
+ if (!set) {
+ flags |= O_NONBLOCK;
+ } else {
+ flags &= ~O_NONBLOCK;
+ }
+
+ return nixio__pstatus(L, !fcntl(fd, F_SETFL, flags));
+
+#else /* __WINNT__ */
+
+ lua_getmetatable(L, 1);
+ luaL_getmetatable(L, NIXIO_META);
+ if (lua_equal(L, -1, -2)) { /* Socket */
+ unsigned long val = !set;
+ return nixio__pstatus_s(L, !ioctlsocket(fd, FIONBIO, &val));
+ } else { /* File */
+ WSASetLastError(WSAENOTSOCK);
+ return nixio__perror_s(L);
+ }
+
+#endif /* __WINNT__ */
+}
+
+static int nixio__gso_int(lua_State *L, int fd, int level, int opt, int set) {
+ int value;
+ socklen_t optlen = sizeof(value);
+ if (!set) {
+ if (!getsockopt(fd, level, opt, (char *)&value, &optlen)) {
+ lua_pushinteger(L, value);
+ return 1;
+ }
+ } else {
+ value = luaL_checkinteger(L, set);
+ if (!setsockopt(fd, level, opt, (char *)&value, optlen)) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+ return nixio__perror_s(L);
+}
+
+static int nixio__gso_ling(lua_State *L, int fd, int level, int opt, int set) {
+ struct linger value;
+ socklen_t optlen = sizeof(value);
+ if (!set) {
+ if (!getsockopt(fd, level, opt, (char *)&value, &optlen)) {
+ lua_pushinteger(L, value.l_onoff ? value.l_linger : 0);
+ return 1;
+ }
+ } else {
+ value.l_linger = luaL_checkinteger(L, set);
+ value.l_onoff = value.l_linger ? 1 : 0;
+ if (!setsockopt(fd, level, opt, (char *)&value, optlen)) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+ return nixio__perror_s(L);
+}
+
+static int nixio__gso_timev(lua_State *L, int fd, int level, int opt, int set) {
+ struct timeval value;
+ socklen_t optlen = sizeof(value);
+ if (!set) {
+ if (!getsockopt(fd, level, opt, (char *)&value, &optlen)) {
+ lua_pushinteger(L, value.tv_sec);
+ lua_pushinteger(L, value.tv_usec);
+ return 2;
+ }
+ } else {
+ value.tv_sec = luaL_checkinteger(L, set);
+ value.tv_usec = luaL_optinteger(L, set + 1, 0);
+ if (!setsockopt(fd, level, opt, (char *)&value, optlen)) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+ return nixio__perror_s(L);
+}
+
+#ifdef SO_BINDTODEVICE
+
+static int nixio__gso_b(lua_State *L, int fd, int level, int opt, int set) {
+ if (!set) {
+ socklen_t optlen = IFNAMSIZ;
+ char ifname[IFNAMSIZ];
+ if (!getsockopt(fd, level, opt, (char *)ifname, &optlen)) {
+ lua_pushlstring(L, ifname, optlen);
+ return 1;
+ }
+ } else {
+ size_t valuelen;
+ const char *value = luaL_checklstring(L, set, &valuelen);
+ luaL_argcheck(L, valuelen <= IFNAMSIZ, set, "invalid interface name");
+ if (!setsockopt(fd, level, opt, (char *)value, valuelen)) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+ return nixio__perror_s(L);
+}
+
+#endif /* SO_BINDTODEVICE */
+
+static int nixio__gso_mreq4(lua_State *L, int fd, int level, int opt, int set) {
+ struct ip_mreq value;
+ socklen_t optlen = sizeof(value);
+ if (!set) {
+ char buf[INET_ADDRSTRLEN];
+ if (!getsockopt(fd, level, opt, (char *)&value, &optlen)) {
+ if (!inet_ntop(AF_INET, &value.imr_multiaddr, buf, sizeof(buf))) {
+ return nixio__perror_s(L);
+ }
+ lua_pushstring(L, buf);
+ if (!inet_ntop(AF_INET, &value.imr_interface, buf, sizeof(buf))) {
+ return nixio__perror_s(L);
+ }
+ lua_pushstring(L, buf);
+ return 2;
+ }
+ } else {
+ const char *maddr = luaL_checkstring(L, set);
+ const char *iface = luaL_optstring(L, set + 1, "0.0.0.0");
+ if (inet_pton(AF_INET, maddr, &value.imr_multiaddr) < 1) {
+ return nixio__perror_s(L);
+ }
+ if (inet_pton(AF_INET, iface, &value.imr_interface) < 1) {
+ return nixio__perror_s(L);
+ }
+ if (!setsockopt(fd, level, opt, (char *)&value, optlen)) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+ return nixio__perror_s(L);
+}
+
+static int nixio__gso_mreq6(lua_State *L, int fd, int level, int opt, int set) {
+ struct ipv6_mreq val;
+ socklen_t optlen = sizeof(val);
+ if (!set) {
+ char buf[INET_ADDRSTRLEN];
+ if (!getsockopt(fd, level, opt, (char *)&val, &optlen)) {
+ if (!inet_ntop(AF_INET6, &val.ipv6mr_multiaddr, buf, sizeof(buf))) {
+ return nixio__perror_s(L);
+ }
+ lua_pushstring(L, buf);
+ lua_pushinteger(L, val.ipv6mr_interface);
+ return 2;
+ }
+ } else {
+ const char *maddr = luaL_checkstring(L, set);
+ if (inet_pton(AF_INET6, maddr, &val.ipv6mr_multiaddr) < 1) {
+ return nixio__perror_s(L);
+ }
+ val.ipv6mr_interface = luaL_optlong(L, set + 1, 0);
+ if (!setsockopt(fd, level, opt, (char *)&val, optlen)) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+ return nixio__perror_s(L);
+}
+
+/**
+ * get/setsockopt() helper
+ */
+static int nixio__getsetsockopt(lua_State *L, int set) {
+ nixio_sock *sock = nixio__checksock(L);
+ const char *level = luaL_optlstring(L, 2, "", NULL);
+ const char *option = luaL_optlstring(L, 3, "", NULL);
+ set = (set) ? 4 : 0;
+
+ if (!strcmp(level, "socket")) {
+ if (!strcmp(option, "keepalive")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_KEEPALIVE, set);
+ } else if (!strcmp(option, "reuseaddr")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_REUSEADDR, set);
+ } else if (!strcmp(option, "rcvbuf")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_RCVBUF, set);
+ } else if (!strcmp(option, "sndbuf")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_SNDBUF, set);
+ } else if (!strcmp(option, "priority")) {
+#ifdef SO_PRIORITY
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_PRIORITY, set);
+#else
+ return nixio__pstatus(L, !(errno = ENOPROTOOPT));
+#endif
+ } else if (!strcmp(option, "broadcast")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_BROADCAST, set);
+ } else if (!strcmp(option, "dontroute")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_DONTROUTE, set);
+ } else if (!strcmp(option, "error")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_ERROR, set);
+ } else if (!strcmp(option, "oobinline")) {
+ return nixio__gso_int(L, sock->fd, SOL_SOCKET, SO_OOBINLINE, set);
+ } else if (!strcmp(option, "linger")) {
+ return nixio__gso_ling(L, sock->fd, SOL_SOCKET, SO_LINGER, set);
+ } else if (!strcmp(option, "sndtimeo")) {
+ return nixio__gso_timev(L, sock->fd, SOL_SOCKET, SO_SNDTIMEO, set);
+ } else if (!strcmp(option, "rcvtimeo")) {
+ return nixio__gso_timev(L, sock->fd, SOL_SOCKET, SO_RCVTIMEO, set);
+ } else if (!strcmp(option, "bindtodevice")) {
+#ifdef SO_BINDTODEVICE
+ return nixio__gso_b(L, sock->fd, SOL_SOCKET, SO_BINDTODEVICE, set);
+#else
+ return nixio__pstatus(L, !(errno = ENOPROTOOPT));
+#endif
+ } else {
+ return luaL_argerror(L, 3, "supported values: keepalive, reuseaddr,"
+ " sndbuf, rcvbuf, priority, broadcast, linger, sndtimeo, rcvtimeo,"
+ " dontroute, bindtodevice, error, oobinline"
+ );
+ }
+ } else if (!strcmp(level, "tcp")) {
+ if (!strcmp(option, "cork")) {
+#ifdef TCP_CORK
+ return nixio__gso_int(L, sock->fd, IPPROTO_TCP, TCP_CORK, set);
+#else
+ return nixio__pstatus(L, !(errno = ENOPROTOOPT));
+#endif
+ } else if (!strcmp(option, "nodelay")) {
+ return nixio__gso_int(L, sock->fd, IPPROTO_TCP, TCP_NODELAY, set);
+ } else {
+ return luaL_argerror(L, 3, "supported values: cork, nodelay");
+ }
+ } else if (!strcmp(level, "ip")) {
+ if (!strcmp(option, "mtu")) {
+#ifdef IP_MTU
+ return nixio__gso_int(L, sock->fd, IPPROTO_IP, IP_MTU, set);
+#else
+ return nixio__pstatus(L, !(errno = ENOPROTOOPT));
+#endif
+ } else if (!strcmp(option, "hdrincl")) {
+ return nixio__gso_int(L, sock->fd, IPPROTO_IP, IP_HDRINCL,
+ set);
+ } else if (!strcmp(option, "multicast_loop")) {
+ return nixio__gso_int(L, sock->fd, IPPROTO_IP, IP_MULTICAST_LOOP,
+ set);
+ } else if (!strcmp(option, "multicast_ttl")) {
+ return nixio__gso_int(L, sock->fd, IPPROTO_IP, IP_MULTICAST_TTL,
+ set);
+ } else if (!strcmp(option, "multicast_if")) {
+ return nixio__gso_mreq4(L, sock->fd, IPPROTO_IP, IP_MULTICAST_IF,
+ set);
+ } else if (!strcmp(option, "add_membership")) {
+ return nixio__gso_mreq4(L, sock->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
+ set);
+ } else if (!strcmp(option, "drop_membership")) {
+ return nixio__gso_mreq4(L, sock->fd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
+ set);
+ } else {
+ return luaL_argerror(L, 3,
+ "supported values: hdrincl, mtu, multicast_loop, "
+ "multicast_ttl, multicast_if, add_membership, drop_membership");
+ }
+ } else if (!strcmp(level, "ipv6")) {
+ if (!strcmp(option, "mtu")) {
+#ifdef IPV6_MTU
+ return nixio__gso_int(L, sock->fd, IPPROTO_IPV6, IPV6_MTU, set);
+#else
+ return nixio__pstatus(L, !(errno = ENOPROTOOPT));
+#endif
+ } else if (!strcmp(option, "v6only")) {
+#ifdef IPV6_V6ONLY
+ return nixio__gso_int(L, sock->fd, IPPROTO_IPV6, IPV6_V6ONLY, set);
+#else
+ return nixio__pstatus(L, !(errno = ENOPROTOOPT));
+#endif
+ } else if (!strcmp(option, "multicast_loop")) {
+ return nixio__gso_int(L, sock->fd, IPPROTO_IPV6,
+ IPV6_MULTICAST_LOOP, set);
+ } else if (!strcmp(option, "multicast_hops")) {
+ return nixio__gso_int(L, sock->fd, IPPROTO_IPV6,
+ IPV6_MULTICAST_HOPS, set);
+ } else if (!strcmp(option, "multicast_if")) {
+ return nixio__gso_mreq6(L, sock->fd, IPPROTO_IPV6,
+ IPV6_MULTICAST_IF, set);
+ } else if (!strcmp(option, "add_membership")) {
+ return nixio__gso_mreq6(L, sock->fd, IPPROTO_IPV6,
+ IPV6_ADD_MEMBERSHIP, set);
+ } else if (!strcmp(option, "drop_membership")) {
+ return nixio__gso_mreq6(L, sock->fd, IPPROTO_IPV6,
+ IPV6_DROP_MEMBERSHIP, set);
+ } else {
+ return luaL_argerror(L, 3,
+ "supported values: v6only, mtu, multicast_loop, multicast_hops,"
+ " multicast_if, add_membership, drop_membership");
+ }
+ } else {
+ return luaL_argerror(L, 2, "supported values: socket, tcp, ip, ipv6");
+ }
+}
+
+/**
+ * getsockopt()
+ */
+static int nixio_sock_getsockopt(lua_State *L) {
+ return nixio__getsetsockopt(L, 0);
+}
+
+/**
+ * setsockopt()
+ */
+static int nixio_sock_setsockopt(lua_State *L) {
+ return nixio__getsetsockopt(L, 1);
+}
+
+/* module table */
+static const luaL_reg M[] = {
+ {"setblocking", nixio_sock_setblocking},
+ {"getsockopt", nixio_sock_getsockopt},
+ {"setsockopt", nixio_sock_setsockopt},
+ {"getopt", nixio_sock_getsockopt},
+ {"setopt", nixio_sock_setsockopt},
+ {"fileno", nixio_sock_fileno},
+ {NULL, NULL}
+};
+
+void nixio_open_sockopt(lua_State *L) {
+ lua_pushvalue(L, -2);
+ luaL_register(L, NULL, M);
+ lua_pop(L, 1);
+
+ luaL_getmetatable(L, NIXIO_FILE_META);
+ lua_pushcfunction(L, nixio_sock_setblocking);
+ lua_setfield(L, -2, "setblocking");
+ lua_pushcfunction(L, nixio_sock_fileno);
+ lua_setfield(L, -2, "fileno");
+ lua_pop(L, 1);
+}
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