Preliminary IPv6 support for v2.1

25 files changed, 381 insertions, 39 deletions

diff --git a/src/auxiliar.c b/src/auxiliar.c
index fcc7e23..9514970 100644
--- a/src/auxiliar.c
+++ b/src/auxiliar.c
@@ -2,7 +2,7 @@
 * Auxiliar routines for class hierarchy manipulation
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: auxiliar.c,v 1.14 2005/10/07 04:40:59 diego Exp $
 \*=========================================================================*/
 #include <string.h>
 #include <stdio.h>
diff --git a/src/buffer.c b/src/buffer.c
index 5be0faf..fbe00eb 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2,7 +2,7 @@
 * Input/Output interface for Lua programs
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: buffer.c,v 1.29 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include "lua.h"
 #include "lauxlib.h"
diff --git a/src/except.c b/src/except.c
index fc4c038..5faa5be 100644
--- a/src/except.c
+++ b/src/except.c
@@ -2,7 +2,7 @@
 * Simple exception support
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: except.c,v 1.8 2005/09/29 06:11:41 diego Exp $
 \*=========================================================================*/
 #include <stdio.h>
 
diff --git a/src/ftp.lua b/src/ftp.lua
index c90a65c..1d5ff77 100644
--- a/src/ftp.lua
+++ b/src/ftp.lua
@@ -2,7 +2,7 @@
 -- FTP support for the Lua language
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: ftp.lua,v 1.45 2007/07/11 19:25:47 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/headers.lua b/src/headers.lua
new file mode 100644
index 0000000..f92ee7a
--- /dev/null
+++ b/src/headers.lua
@@ -0,0 +1,100 @@
+-----------------------------------------------------------------------------
+-- Canonic header field capitalization
+-- LuaSocket toolkit.
+-- Author: Diego Nehab
+-- RCS ID: $Id$
+-----------------------------------------------------------------------------
+module("socket.headers")
+
+canonic = {
+    ["accept"] = "Accept",
+    ["accept-charset"] = "Accept-Charset",
+    ["accept-encoding"] = "Accept-Encoding",
+    ["accept-language"] = "Accept-Language",
+    ["accept-ranges"] = "Accept-Ranges",
+    ["action"] = "Action",
+    ["alternate-recipient"] = "Alternate-Recipient",
+    ["age"] = "Age",
+    ["allow"] = "Allow",
+    ["arrival-date"] = "Arrival-Date",
+    ["authorization"] = "Authorization",
+    ["bcc"] = "Bcc",
+    ["cache-control"] = "Cache-Control",
+    ["cc"] = "Cc",
+    ["comments"] = "Comments",
+    ["connection"] = "Connection",
+    ["content-description"] = "Content-Description",
+    ["content-disposition"] = "Content-Disposition",
+    ["content-encoding"] = "Content-Encoding",
+    ["content-id"] = "Content-ID",
+    ["content-language"] = "Content-Language",
+    ["content-length"] = "Content-Length",
+    ["content-location"] = "Content-Location",
+    ["content-md5"] = "Content-MD5",
+    ["content-range"] = "Content-Range",
+    ["content-transfer-encoding"] = "Content-Transfer-Encoding",
+    ["content-type"] = "Content-Type",
+    ["date"] = "Date",
+    ["diagnostic-code"] = "Diagnostic-Code",
+    ["dsn-gateway"] = "DSN-Gateway",
+    ["etag"] = "ETag",
+    ["expect"] = "Expect",
+    ["expires"] = "Expires",
+    ["final-log-id"] = "Final-Log-ID",
+    ["final-recipient"] = "Final-Recipient",
+    ["from"] = "From",
+    ["host"] = "Host",
+    ["if-match"] = "If-Match",
+    ["if-modified-since"] = "If-Modified-Since",
+    ["if-none-match"] = "If-None-Match",
+    ["if-range"] = "If-Range",
+    ["if-unmodified-since"] = "If-Unmodified-Since",
+    ["in-reply-to"] = "In-Reply-To",
+    ["keywords"] = "Keywords",
+    ["last-attempt-date"] = "Last-Attempt-Date",
+    ["last-modified"] = "Last-Modified",
+    ["location"] = "Location",
+    ["max-forwards"] = "Max-Forwards",
+    ["message-id"] = "Message-ID",
+    ["mime-version"] = "MIME-Version",
+    ["original-envelope-id"] = "Original-Envelope-ID",
+    ["original-recipient"] = "Original-Recipient",
+    ["pragma"] = "Pragma",
+    ["proxy-authenticate"] = "Proxy-Authenticate",
+    ["proxy-authorization"] = "Proxy-Authorization",
+    ["range"] = "Range",
+    ["received"] = "Received",
+    ["received-from-mta"] = "Received-From-MTA",
+    ["references"] = "References",
+    ["referer"] = "Referer",
+    ["remote-mta"] = "Remote-MTA",
+    ["reply-to"] = "Reply-To",
+    ["reporting-mta"] = "Reporting-MTA",
+    ["resent-bcc"] = "Resent-Bcc",
+    ["resent-cc"] = "Resent-Cc",
+    ["resent-date"] = "Resent-Date",
+    ["resent-from"] = "Resent-From",
+    ["resent-message-id"] = "Resent-Message-ID",
+    ["resent-reply-to"] = "Resent-Reply-To",
+    ["resent-sender"] = "Resent-Sender",
+    ["resent-to"] = "Resent-To",
+    ["retry-after"] = "Retry-After",
+    ["return-path"] = "Return-Path",
+    ["sender"] = "Sender",
+    ["server"] = "Server",
+    ["smtp-remote-recipient"] = "SMTP-Remote-Recipient",
+    ["status"] = "Status",
+    ["subject"] = "Subject",
+    ["te"] = "TE",
+    ["to"] = "To",
+    ["trailer"] = "Trailer",
+    ["transfer-encoding"] = "Transfer-Encoding",
+    ["upgrade"] = "Upgrade",
+    ["user-agent"] = "User-Agent",
+    ["vary"] = "Vary",
+    ["via"] = "Via",
+    ["warning"] = "Warning",
+    ["will-retry-until"] = "Will-Retry-Until",
+    ["www-authenticate"] = "WWW-Authenticate",
+    ["x-mailer"] = "X-Mailer",
+}
diff --git a/src/http.lua b/src/http.lua
index 4c27149..029a367 100644
--- a/src/http.lua
+++ b/src/http.lua
@@ -2,7 +2,7 @@
 -- HTTP/1.1 client support for the Lua language.
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: http.lua,v 1.72 2009/05/27 09:31:35 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/inet.c b/src/inet.c
index 862288c..21a97c9 100644
--- a/src/inet.c
+++ b/src/inet.c
@@ -2,7 +2,7 @@
 * Internet domain functions
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: inet.c,v 1.28 2005/10/07 04:40:59 diego Exp $
 \*=========================================================================*/
 #include <stdio.h>
 #include <string.h>
@@ -16,14 +16,16 @@
 * Internal function prototypes.
 \*=========================================================================*/
 static int inet_global_toip(lua_State *L);
+static int inet_global_toip6(lua_State *L);
 static int inet_global_tohostname(lua_State *L);
 static void inet_pushresolved(lua_State *L, struct hostent *hp);
 static int inet_global_gethostname(lua_State *L);
 
 /* DNS functions */
 static luaL_reg func[] = {
-    { "toip", inet_global_toip },
-    { "tohostname", inet_global_tohostname },
+    { "toip", inet_global_toip},
+    { "toip6", inet_global_toip6},
+    { "tohostname", inet_global_tohostname},
     { "gethostname", inet_global_gethostname},
     { NULL, NULL}
 };
@@ -95,6 +97,50 @@ static int inet_global_toip(lua_State *L)
     return 2;
 }
 
+static int inet_global_toip6(lua_State *L)
+{
+    const char *hostname = luaL_checkstring(L, 1);
+    struct addrinfo *iterator = NULL, *resolved = NULL;
+    struct addrinfo hints;
+    int i = 1, ret = 0;
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_socktype = SOCK_STREAM;
+    hints.ai_family = PF_UNSPEC;
+    ret = getaddrinfo(hostname, NULL, &hints, &resolved);
+    if (ret != 0) {
+        lua_pushnil(L);
+        lua_pushstring(L, "getaddrinfo returned error");
+        return 2;
+    }
+    lua_newtable(L);
+    for (iterator = resolved; iterator; iterator = iterator->ai_next) {
+        char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
+        getnameinfo(iterator->ai_addr, iterator->ai_addrlen, hbuf, sizeof(hbuf),
+                sbuf, 0, NI_NUMERICHOST);
+        lua_pushnumber(L, i);
+        lua_newtable(L);
+        switch (iterator->ai_family) {
+            case AF_INET:
+                lua_pushliteral(L, "family");
+                lua_pushliteral(L, "inet");
+                lua_settable(L, -3);
+                break;
+            case AF_INET6:
+                lua_pushliteral(L, "family");
+                lua_pushliteral(L, "inet6");
+                lua_settable(L, -3);
+                break;;
+        }
+        lua_pushliteral(L, "addr");
+        lua_pushstring(L, hbuf);
+        lua_settable(L, -3);
+        lua_settable(L, -3);
+        i++;
+    } 
+    freeaddrinfo(resolved);
+    return 1;
+}
+
 
 /*-------------------------------------------------------------------------*\
 * Gets the host name
diff --git a/src/io.c b/src/io.c
index 317cfd4..06dc50e 100644
--- a/src/io.c
+++ b/src/io.c
@@ -2,7 +2,7 @@
 * Input/Output abstraction
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: io.c,v 1.6 2005/09/29 06:11:41 diego Exp $
 \*=========================================================================*/
 #include "io.h"
 
diff --git a/src/ltn12.lua b/src/ltn12.lua
index f10ad18..b42689a 100644
--- a/src/ltn12.lua
+++ b/src/ltn12.lua
@@ -2,7 +2,7 @@
 -- LTN12 - Filters, sources, sinks and pumps.
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: ltn12.lua,v 1.31 2006/04/03 04:45:42 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/luasocket.h b/src/luasocket.h
index d7a78bb..3949421 100644
--- a/src/luasocket.h
+++ b/src/luasocket.h
@@ -11,8 +11,8 @@
 /*-------------------------------------------------------------------------*\
 * Current socket library version
 \*-------------------------------------------------------------------------*/
-#define LUASOCKET_VERSION    "LuaSocket 2.0.3"
-#define LUASOCKET_COPYRIGHT  "Copyright (C) 1999-2009 Diego Nehab"
+#define LUASOCKET_VERSION    "LuaSocket 2.1.0"
+#define LUASOCKET_COPYRIGHT  "Copyright (C) 1999-2011 Diego Nehab"
 #define LUASOCKET_AUTHORS    "Diego Nehab"
 
 /*-------------------------------------------------------------------------*\
diff --git a/src/mime.c b/src/mime.c
index 1e8fded..218e6f7 100644
--- a/src/mime.c
+++ b/src/mime.c
@@ -2,7 +2,7 @@
 * MIME support functions
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: mime.c,v 1.29 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <string.h>
 
diff --git a/src/mime.lua b/src/mime.lua
index eb75db2..169eda2 100644
--- a/src/mime.lua
+++ b/src/mime.lua
@@ -2,7 +2,7 @@
 -- MIME support for the Lua language.
 -- Author: Diego Nehab
 -- Conforming to RFCs 2045-2049
--- RCS ID: $Id$
+-- RCS ID: $Id: mime.lua,v 1.29 2007/06/11 23:44:54 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/options.c b/src/options.c
index 1d4c950..1f5afa8 100644
--- a/src/options.c
+++ b/src/options.c
@@ -2,7 +2,7 @@
 * Common option interface 
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: options.c,v 1.7 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <string.h> 
 
diff --git a/src/select.c b/src/select.c
index 8e47d0e..0931b73 100644
--- a/src/select.c
+++ b/src/select.c
@@ -2,7 +2,7 @@
 * Select implementation
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: select.c,v 1.23 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <string.h>
 
@@ -95,8 +95,10 @@ static t_socket getfd(lua_State *L) {
     if (!lua_isnil(L, -1)) {
         lua_pushvalue(L, -2);
         lua_call(L, 1, 1);
-        if (lua_isnumber(L, -1)) 
-            fd = (t_socket) lua_tonumber(L, -1); 
+        if (lua_isnumber(L, -1)) {
+            double numfd = lua_tonumber(L, -1); 
+            fd = (numfd >= 0.0)? (t_socket) numfd: SOCKET_INVALID;
+        }
     } 
     lua_pop(L, 1);
     return fd;
@@ -134,8 +136,13 @@ static void collect_fd(lua_State *L, int tab, int itab,
         fd = getfd(L);
         if (fd != SOCKET_INVALID) {
             /* make sure we don't overflow the fd_set */
+#ifdef _WIN32
             if (n >= FD_SETSIZE) 
                 luaL_argerror(L, tab, "too many sockets");
+#else
+            if (fd >= FD_SETSIZE) 
+                luaL_argerror(L, tab, "descriptor too large for set size");
+#endif
             FD_SET(fd, set);
             n++;
             /* keep track of the largest descriptor so far */
diff --git a/src/smtp.lua b/src/smtp.lua
index b39f5d6..e258d62 100644
--- a/src/smtp.lua
+++ b/src/smtp.lua
@@ -2,7 +2,7 @@
 -- SMTP client support for the Lua language.
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: smtp.lua,v 1.47 2009/05/27 09:31:35 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/socket.h b/src/socket.h
index 425628d..e325952 100644
--- a/src/socket.h
+++ b/src/socket.h
@@ -59,6 +59,7 @@ int socket_accept(p_socket ps, p_socket pa, SA *addr,
         socklen_t *addr_len, p_timeout tm);
 
 const char *socket_hoststrerror(int err);
+const char *socket_gaistrerror(int err);
 const char *socket_strerror(int err);
 
 /* these are perfect to use with the io abstraction module 
diff --git a/src/socket.lua b/src/socket.lua
index 458418e..211adcd 100644
--- a/src/socket.lua
+++ b/src/socket.lua
@@ -1,7 +1,7 @@
 -----------------------------------------------------------------------------
 -- LuaSocket helper module
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: socket.lua,v 1.22 2005/11/22 08:33:29 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/tcp.c b/src/tcp.c
index 06d687b..3204b40 100644
--- a/src/tcp.c
+++ b/src/tcp.c
@@ -2,7 +2,7 @@
 * TCP object 
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: tcp.c,v 1.42 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <string.h> 
 
@@ -19,6 +19,8 @@
 * Internal function prototypes
 \*=========================================================================*/
 static int global_create(lua_State *L);
+static int global_connect6(lua_State *L);
+static int global_bind6(lua_State *L);
 static int meth_connect(lua_State *L);
 static int meth_listen(lua_State *L);
 static int meth_bind(lua_State *L);
@@ -75,6 +77,8 @@ static t_opt optset[] = {
 /* functions in library namespace */
 static luaL_reg func[] = {
     {"tcp", global_create},
+    {"connect6", global_connect6},
+    {"bind6", global_bind6},
     {NULL, NULL}
 };
 
@@ -208,6 +212,7 @@ static int meth_bind(lua_State *L)
 \*-------------------------------------------------------------------------*/
 static int meth_connect(lua_State *L)
 {
+
     p_tcp tcp = (p_tcp) auxiliar_checkgroup(L, "tcp{any}", 1);
     const char *address =  luaL_checkstring(L, 2);
     unsigned short port = (unsigned short) luaL_checknumber(L, 3);
@@ -220,7 +225,6 @@ static int meth_connect(lua_State *L)
         lua_pushstring(L, err);
         return 2;
     }
-    /* turn master object into a client object */
     lua_pushnumber(L, 1);
     return 1;
 }
@@ -313,8 +317,7 @@ static int meth_settimeout(lua_State *L)
 /*-------------------------------------------------------------------------*\
 * Creates a master tcp object 
 \*-------------------------------------------------------------------------*/
-static int global_create(lua_State *L)
-{
+static int global_create(lua_State *L) {
     t_socket sock;
     const char *err = inet_trycreate(&sock, SOCK_STREAM);
     /* try to allocate a system socket */
@@ -337,3 +340,173 @@ static int global_create(lua_State *L)
         return 2;
     }
 }
+
+static const char *trybind6(const char *localaddr, const char *localserv,
+    struct addrinfo *bindhints, p_tcp tcp) {
+    struct addrinfo *iterator = NULL, *resolved = NULL;
+    const char *err = NULL;
+    /* translate luasocket special values to C */
+    if (strcmp(localaddr, "*") == 0) localaddr = NULL;
+    if  (!localserv) localserv = "0";
+    /* try resolving */
+    err = socket_gaistrerror(getaddrinfo(localaddr, localserv, 
+            bindhints, &resolved));
+    if (err) {
+        if (resolved) freeaddrinfo(resolved);
+        return err;
+    }
+    /* iterate over resolved addresses until one is good */
+    for (iterator = resolved; iterator; iterator = iterator->ai_next) {
+        /* create a new socket each time because parameters
+         * may have changed */
+        const char *err = socket_strerror(socket_create(&tcp->sock, 
+            iterator->ai_family, iterator->ai_socktype, 
+            iterator->ai_protocol));
+        /* if failed to create socket, bail out */
+        if (err != NULL) {
+            freeaddrinfo(resolved);
+            return err;
+        }
+        /* all sockets are set as non-blocking initially */
+        socket_setnonblocking(&tcp->sock);
+        /* try binding to local address */
+        err = socket_strerror(socket_bind(&tcp->sock, 
+            (SA *) iterator->ai_addr,
+            iterator->ai_addrlen));
+        /* if faiiled, we try the next one */
+        if (err != NULL) socket_destroy(&tcp->sock);
+        /* if success, we abort loop */
+        else break;
+    }
+    /* at this point, if err is not set, se succeeded */
+    if (err == NULL) {
+        /* save family of chosen local address */ 
+        bindhints->ai_family = iterator->ai_family;
+    }
+    /* cleanup and return error */
+    freeaddrinfo(resolved);
+    return err; 
+}
+
+static int global_bind6(lua_State *L) {
+    const char *localaddr  = luaL_checkstring(L, 1);
+    const char *localserv  = luaL_checkstring(L, 2);
+    int backlog = luaL_checkint(L, 3);
+    p_tcp tcp = (p_tcp) lua_newuserdata(L, sizeof(t_tcp));
+    struct addrinfo bindhints;
+    const char *err = NULL;
+    /* initialize tcp structure */
+    io_init(&tcp->io, (p_send) socket_send, (p_recv) socket_recv, 
+            (p_error) socket_ioerror, &tcp->sock);
+    timeout_init(&tcp->tm, -1, -1);
+    buffer_init(&tcp->buf, &tcp->io, &tcp->tm);
+    tcp->sock = SOCKET_INVALID;
+    /* try binding to local address */
+    memset(&bindhints, 0, sizeof(bindhints));
+    bindhints.ai_socktype = SOCK_STREAM;
+    bindhints.ai_family = PF_UNSPEC;
+    bindhints.ai_flags = AI_PASSIVE;
+    err = trybind6(localaddr, localserv, &bindhints, tcp);
+    if (err == NULL) {
+        /* all server sockets initially with reuseaddr set */
+        int val = 1;
+        setsockopt(tcp->sock, SOL_SOCKET, SO_REUSEADDR, 
+            (char *) &val, sizeof(val));
+        /* set the backlog and listen */
+        err = socket_strerror(socket_listen(&tcp->sock, backlog));
+        if (err) {
+            socket_destroy(&tcp->sock);
+            lua_pushnil(L);
+            lua_pushstring(L, err); 
+            return 2;
+        }
+        auxiliar_setclass(L, "tcp{server}", -1);
+        return 1;
+    } else {
+        lua_pushnil(L);
+        lua_pushstring(L, err);
+        return 2;
+    }
+}
+
+static const char *tryconnect6(const char *remoteaddr, const char *remoteserv,
+    struct addrinfo *connecthints, p_tcp tcp) {
+    struct addrinfo *iterator = NULL, *resolved = NULL;
+    const char *err = NULL;
+    /* try resolving */
+    err = socket_gaistrerror(getaddrinfo(remoteaddr, remoteserv, 
+                connecthints, &resolved));
+    if (err != NULL) {
+        if (resolved) freeaddrinfo(resolved);
+        return err; 
+    }
+    /* iterate over all returned addresses trying to connect */
+    for (iterator = resolved; iterator; iterator = iterator->ai_next) {
+        p_timeout tm = timeout_markstart(&tcp->tm);
+        /* create new socket if one wasn't created by the bind stage */
+        if (tcp->sock == SOCKET_INVALID) {
+            const char *err = socket_strerror(socket_create(&tcp->sock, 
+                iterator->ai_family, iterator->ai_socktype, 
+                iterator->ai_protocol));
+            if (err != NULL) {
+                freeaddrinfo(resolved);
+                return err;
+            }
+            /* all sockets initially non-blocking */
+            socket_setnonblocking(&tcp->sock);
+        }
+        /* finally try connecting to remote address */
+        err = socket_strerror(socket_connect(&tcp->sock, 
+            (SA *) iterator->ai_addr,
+            iterator->ai_addrlen, tm));
+        /* if success, break out of loop */
+        if (err == NULL) break;
+    }
+
+    freeaddrinfo(resolved);
+    /* here, if err is set, we failed */
+    return err;
+}
+
+static int global_connect6(lua_State *L) {
+    const char *remoteaddr = luaL_checkstring(L, 1);
+    const char *remoteserv = luaL_checkstring(L, 2);
+    const char *localaddr  = luaL_optstring(L, 3, NULL);
+    const char *localserv  = luaL_optstring(L, 4, "0");
+    p_tcp tcp = (p_tcp) lua_newuserdata(L, sizeof(t_tcp));
+    struct addrinfo bindhints, connecthints;
+    const char *err = NULL;
+    /* initialize tcp structure */
+    io_init(&tcp->io, (p_send) socket_send, (p_recv) socket_recv, 
+            (p_error) socket_ioerror, &tcp->sock);
+    timeout_init(&tcp->tm, -1, -1);
+    buffer_init(&tcp->buf, &tcp->io, &tcp->tm);
+    tcp->sock = SOCKET_INVALID;
+    /* allow user to pick local address and port */
+    memset(&bindhints, 0, sizeof(bindhints));
+    bindhints.ai_socktype = SOCK_STREAM;
+    bindhints.ai_family = PF_UNSPEC;
+    bindhints.ai_flags = AI_PASSIVE;
+    if (localaddr) {
+        err = trybind6(localaddr, localserv, &bindhints, tcp);
+        if (err) {
+            lua_pushnil(L);
+            lua_pushstring(L, err);
+            return 2;
+        }
+    }
+    /* try to connect to remote address and port */
+    memset(&connecthints, 0, sizeof(connecthints));
+    connecthints.ai_socktype = SOCK_STREAM;
+    /* make sure we try to connect only to the same family */
+    connecthints.ai_family = bindhints.ai_family; 
+    err = tryconnect6(remoteaddr, remoteserv, &connecthints, tcp);
+    if (err) {
+        socket_destroy(&tcp->sock);
+        lua_pushnil(L);
+        lua_pushstring(L, err);
+        return 2;
+    }
+    auxiliar_setclass(L, "tcp{client}", -1);
+    return 1;
+}
diff --git a/src/timeout.c b/src/timeout.c
index fb015f9..cc7309c 100644
--- a/src/timeout.c
+++ b/src/timeout.c
@@ -2,7 +2,7 @@
 * Timeout management functions
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: timeout.c,v 1.31 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <stdio.h>
 #include <limits.h>
diff --git a/src/tp.lua b/src/tp.lua
index 46f7f64..adeb4b0 100644
--- a/src/tp.lua
+++ b/src/tp.lua
@@ -2,7 +2,7 @@
 -- Unified SMTP/FTP subsystem
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: tp.lua,v 1.23 2009/05/27 09:31:35 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
diff --git a/src/udp.c b/src/udp.c
index db519ca..e3c86e7 100644
--- a/src/udp.c
+++ b/src/udp.c
@@ -2,7 +2,7 @@
 * UDP object 
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: udp.c,v 1.30 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <string.h> 
 
diff --git a/src/unix.c b/src/unix.c
index a309823..6962517 100644
--- a/src/unix.c
+++ b/src/unix.c
@@ -2,7 +2,7 @@
 * Unix domain socket 
 * LuaSocket toolkit
 *
-* RCS ID: $Id$
+* RCS ID: $Id: unix.c,v 1.14 2009/05/27 09:31:35 diego Exp $
 \*=========================================================================*/
 #include <string.h> 
 
diff --git a/src/url.lua b/src/url.lua
index 7623557..2158796 100644
--- a/src/url.lua
+++ b/src/url.lua
@@ -2,7 +2,7 @@
 -- URI parsing, composition and relative URL resolution
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- RCS ID: $Id$
+-- RCS ID: $Id: url.lua,v 1.38 2006/04/03 04:45:42 diego Exp $
 -----------------------------------------------------------------------------
 
 -----------------------------------------------------------------------------
@@ -195,13 +195,7 @@ function build(parsed)
         end
         if userinfo then authority = userinfo .. "@" .. authority end
     end
-    if authority then 
-        if string.sub(url, 1, 1) == "/" then
-            url = "//" .. authority .. url 
-        else
-            url = "//" .. authority .. "/" .. url 
-        end
-    end
+    if authority then url = "//" .. authority .. url end
     if parsed.scheme then url = parsed.scheme .. ":" .. url end
     if parsed.fragment then url = url .. "#" .. parsed.fragment end
     -- url = string.gsub(url, "%s", "")
@@ -217,8 +211,8 @@ end
 --   corresponding absolute url
 -----------------------------------------------------------------------------
 function absolute(base_url, relative_url)
-    local base_parsed = base_url
     if base.type(base_url) == "table" then
+        base_parsed = base_url
         base_url = build(base_parsed)
     else
         base_parsed = parse(base_url)
diff --git a/src/usocket.c b/src/usocket.c
index 1ba1043..5201b7b 100644
--- a/src/usocket.c
+++ b/src/usocket.c
@@ -6,7 +6,7 @@
 * The penalty of calling select to avoid busy-wait is only paid when
 * the I/O call fail in the first place. 
 *
-* RCS ID: $Id$
+* RCS ID: $Id: usocket.c,v 1.38 2007/10/13 23:55:20 diego Exp $
 \*=========================================================================*/
 #include <string.h> 
 #include <signal.h>
@@ -368,3 +368,24 @@ const char *socket_ioerror(p_socket ps, int err) {
     (void) ps;
     return socket_strerror(err);
 } 
+
+const char *socket_gaistrerror(int err) {
+    if (err == 0) return NULL; 
+    switch (err) {
+        case EAI_AGAIN: return "temporary failure in name resolution";
+        case EAI_BADFLAGS: return "invalid value for ai_flags";
+        case EAI_BADHINTS: return "invalid value for hints";
+        case EAI_FAIL: return "non-recoverable failure in name resolution";
+        case EAI_FAMILY: return "ai_family not supported";
+        case EAI_MEMORY: return "memory allocation failure";
+        case EAI_NONAME: 
+            return "hostname or servname not provided, or not known";
+        case EAI_OVERFLOW: return "argument buffer overflow";
+        case EAI_PROTOCOL: return "resolved protocol is unknown";
+        case EAI_SERVICE: return "servname not supported for socktype";
+        case EAI_SOCKTYPE: return "ai_socktype not supported";
+        case EAI_SYSTEM: return strerror(errno); 
+        default: return "unknown error";
+    }
+}
+
diff --git a/src/wsocket.c b/src/wsocket.c
index 2d07904..c82882a 100644
--- a/src/wsocket.c
+++ b/src/wsocket.c
@@ -5,7 +5,7 @@
 * The penalty of calling select to avoid busy-wait is only paid when
 * the I/O call fail in the first place. 
 *
-* RCS ID: $Id$
+* RCS ID: $Id: wsocket.c,v 1.36 2007/06/11 23:44:54 diego Exp $
 \*=========================================================================*/
 #include <string.h>