New agnostic IPv4 IPv6 functions.

Also dealing with EPROTOTYPE Yosemite seems to be throwing
at us for no reason.

doc/reference.html

@@ -160,9 +160,11 @@ Support, Manual">
 <a href="socket.html#setsize">_SETSIZE</a>,
 <a href="socket.html#source">source</a>,
 <a href="tcp.html#socket.tcp">tcp</a>,
+<a href="tcp.html#socket.tcp4">tcp4</a>,
 <a href="tcp.html#socket.tcp6">tcp6</a>,
 <a href="socket.html#try">try</a>,
 <a href="udp.html#socket.udp">udp</a>,
+<a href="udp.html#socket.udp4">udp4</a>,
 <a href="udp.html#socket.udp6">udp6</a>,
 <a href="socket.html#version">_VERSION</a>.
 </blockquote>

doc/tcp.html

@@ -44,6 +44,33 @@
 socket.<b>tcp()</b>
 </p>
 
+<p class=description>
+Creates and returns an TCP master object. A master object can
+be transformed into a server object with the method
+<a href=#listen><tt>listen</tt></a> (after a call to <a
+href=#bind><tt>bind</tt></a>) or into a client object with
+the method <a href=#connect><tt>connect</tt></a>. The only other
+method supported by a master object is the
+<a href=#close><tt>close</tt></a> method.</p>
+
+<p class=return>
+In case of success, a new master object is returned. In case of error,
+<b><tt>nil</tt></b> is returned, followed by an error message.
+</p>
+
+<p class=note>
+Note: The choice between IPv4 and IPv6 happens during a call to
+<a href=#bind><tt>bind</tt></a> or <a
+href=#bind><tt>connect</tt></a>, depending on the address
+family obtained from the resolver.
+</p>
+
+<!-- socket.tcp +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<p class=name id="socket.tcp4">
+socket.<b>tcp4()</b>
+</p>
+
 <p class=description>
 Creates and returns an IPv4 TCP master object. A master object can
 be transformed into a server object with the method

doc/udp.html

@@ -45,6 +45,43 @@
 socket.<b>udp()</b>
 </p>
 
+<p class="description">
+Creates and returns an unconnected UDP object.
+Unconnected objects support the
+<a href="#sendto"><tt>sendto</tt></a>,
+<a href="#receive"><tt>receive</tt></a>,
+<a href="#receivefrom"><tt>receivefrom</tt></a>,
+<a href="#getoption"><tt>getoption</tt></a>,
+<a href="#getsockname"><tt>getsockname</tt></a>,
+<a href="#setoption"><tt>setoption</tt></a>,
+<a href="#settimeout"><tt>settimeout</tt></a>,
+<a href="#setpeername"><tt>setpeername</tt></a>,
+<a href="#setsockname"><tt>setsockname</tt></a>, and
+<a href="#close"><tt>close</tt></a>.
+The <a href="#setpeername"><tt>setpeername</tt></a>
+is used to connect the object.
+</p>
+
+<p class="return">
+In case of success, a new unconnected UDP object
+returned. In case of error, <b><tt>nil</tt></b> is returned, followed by
+an error message.
+</p>
+
+<p class=note>
+Note: The choice between IPv4 and IPv6 happens during a call to
+<a href=#sendto><tt>sendto</tt></a>, <a
+href=#setpeername><tt>setpeername</tt></a>, or <a
+href=#setsockname><tt>sockname</tt></a>, depending on the address
+family obtained from the resolver.
+</p>
+
+<!-- socket.udp4 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
+
+<p class="name" id="socket.udp">
+socket.<b>udp4()</b>
+</p>
+
 <p class="description">
 Creates and returns an unconnected IPv4 UDP object.
 Unconnected objects support the
@@ -102,10 +139,6 @@ Note: The TCP object returned will have the option
 "<tt>ipv6-v6only</tt>" set to <tt><b>true</b></tt>.
 </p>
 
-
-
-<!-- close +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
-
 <!-- close +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
 
 <p class="name" id="close">

src/inet.c

@@ -94,7 +94,7 @@ static int inet_global_getnameinfo(lua_State *L) {
 
     memset(&hints, 0, sizeof(hints));
     hints.ai_socktype = SOCK_STREAM;
-    hints.ai_family = PF_UNSPEC;
+    hints.ai_family = AF_UNSPEC;
 
     ret = getaddrinfo(host, serv, &hints, &resolved);
     if (ret != 0) {
@@ -146,7 +146,7 @@ static int inet_global_toip(lua_State *L)
 int inet_optfamily(lua_State* L, int narg, const char* def)
 {
     static const char* optname[] = { "unspec", "inet", "inet6", NULL };
-    static int optvalue[] = { PF_UNSPEC, PF_INET, PF_INET6, 0 };
+    static int optvalue[] = { AF_UNSPEC, AF_INET, AF_INET6, 0 };
 
     return optvalue[luaL_checkoption(L, narg, def, optname)];
 }
@@ -167,7 +167,7 @@ static int inet_global_getaddrinfo(lua_State *L)
     int i = 1, ret = 0;
     memset(&hints, 0, sizeof(hints));
     hints.ai_socktype = SOCK_STREAM;
-    hints.ai_family = PF_UNSPEC;
+    hints.ai_family = AF_UNSPEC;
     ret = getaddrinfo(hostname, NULL, &hints, &resolved);
     if (ret != 0) {
         lua_pushnil(L);
@@ -198,6 +198,16 @@ static int inet_global_getaddrinfo(lua_State *L)
                 lua_pushliteral(L, "inet6");
                 lua_settable(L, -3);
                 break;
+            case AF_UNSPEC:
+                lua_pushliteral(L, "family");
+                lua_pushliteral(L, "unspec");
+                lua_settable(L, -3);
+                break;
+            default:
+                lua_pushliteral(L, "family");
+                lua_pushliteral(L, "unknown");
+                lua_settable(L, -3);
+                break;
         }
         lua_pushliteral(L, "addr");
         lua_pushstring(L, hbuf);
@@ -254,12 +264,11 @@ int inet_meth_getpeername(lua_State *L, p_socket ps, int family)
     }
     lua_pushstring(L, name);
     lua_pushinteger(L, (int) strtol(port, (char **) NULL, 10));
-    if (family == PF_INET) {
+    switch (family) {
-        lua_pushliteral(L, "inet");
+        case AF_INET: lua_pushliteral(L, "inet"); break;
-    } else if (family == PF_INET6) {
+        case AF_INET6: lua_pushliteral(L, "inet6"); break;
-        lua_pushliteral(L, "inet6");
+        case AF_UNSPEC: lua_pushliteral(L, "unspec"); break;
-    } else {
+        default: lua_pushliteral(L, "unknown"); break;
-        lua_pushliteral(L, "uknown family");
     }
     return 3;
 }
@@ -288,12 +297,11 @@ int inet_meth_getsockname(lua_State *L, p_socket ps, int family)
     }
     lua_pushstring(L, name);
     lua_pushstring(L, port);
-    if (family == PF_INET) {
+    switch (family) {
-        lua_pushliteral(L, "inet");
+        case AF_INET: lua_pushliteral(L, "inet"); break;
-    } else if (family == PF_INET6) {
+        case AF_INET6: lua_pushliteral(L, "inet6"); break;
-        lua_pushliteral(L, "inet6");
+        case AF_UNSPEC: lua_pushliteral(L, "unspec"); break;
-    } else {
+        default: lua_pushliteral(L, "unknown"); break;
-        lua_pushliteral(L, "uknown family");
     }
     return 3;
 }
@@ -354,7 +362,7 @@ const char *inet_trycreate(p_socket ps, int family, int type) {
 const char *inet_trydisconnect(p_socket ps, int family, p_timeout tm)
 {
     switch (family) {
-        case PF_INET: {
+        case AF_INET: {
             struct sockaddr_in sin;
             memset((char *) &sin, 0, sizeof(sin));
             sin.sin_family = AF_UNSPEC;
@@ -362,7 +370,7 @@ const char *inet_trydisconnect(p_socket ps, int family, p_timeout tm)
             return socket_strerror(socket_connect(ps, (SA *) &sin,
                 sizeof(sin), tm));
         }
-        case PF_INET6: {
+        case AF_INET6: {
             struct sockaddr_in6 sin6;
             struct in6_addr addrany = IN6ADDR_ANY_INIT;
             memset((char *) &sin6, 0, sizeof(sin6));
@@ -383,6 +391,7 @@ const char *inet_tryconnect(p_socket ps, int *family, const char *address,
 {
     struct addrinfo *iterator = NULL, *resolved = NULL;
     const char *err = NULL;
+    int current_family = *family;
     /* try resolving */
     err = socket_gaistrerror(getaddrinfo(address, serv,
                 connecthints, &resolved));
@@ -397,23 +406,23 @@ const char *inet_tryconnect(p_socket ps, int *family, const char *address,
          * that shows up while iterating. if there was a
          * bind, all families will be the same and we will
          * not enter this branch. */
-        if (*family != iterator->ai_family) {
+        if (current_family != iterator->ai_family || *ps == SOCKET_INVALID) {
             socket_destroy(ps);
             err = socket_strerror(socket_create(ps, iterator->ai_family,
                 iterator->ai_socktype, iterator->ai_protocol));
-            if (err != NULL) {
+            if (err) continue;
-                freeaddrinfo(resolved);
+            current_family = iterator->ai_family;
-                return err;
+            /* set non-blocking before connect */
-            }
-            *family = iterator->ai_family;
-            /* all sockets initially non-blocking */
             socket_setnonblocking(ps);
         }
         /* try connecting to remote address */
         err = socket_strerror(socket_connect(ps, (SA *) iterator->ai_addr,
             (socklen_t) iterator->ai_addrlen, tm));
         /* if success, break out of loop */
-        if (err == NULL) break;
+        if (err == NULL) {
+            *family = current_family;
+            break;
+        }
     }
     freeaddrinfo(resolved);
     /* here, if err is set, we failed */
@@ -424,14 +433,13 @@ const char *inet_tryconnect(p_socket ps, int *family, const char *address,
 * Tries to accept a socket
 \*-------------------------------------------------------------------------*/
 const char *inet_tryaccept(p_socket server, int family, p_socket client,
-    p_timeout tm)
+    p_timeout tm) {
-{
 	socklen_t len;
 	t_sockaddr_storage addr;
-	if (family == PF_INET6) {
+    switch (family) {
-		len = sizeof(struct sockaddr_in6);
+        case AF_INET6: len = sizeof(struct sockaddr_in6); break;
-	} else {
+        case AF_INET: len = sizeof(struct sockaddr_in); break;
-		len = sizeof(struct sockaddr_in);
+        default: len = sizeof(addr); break;
     }
 	return socket_strerror(socket_accept(server, client, (SA *) &addr,
         &len, tm));
@@ -440,12 +448,11 @@ const char *inet_tryaccept(p_socket server, int family, p_socket client,
 /*-------------------------------------------------------------------------*\
 * Tries to bind socket to (address, port)
 \*-------------------------------------------------------------------------*/
-const char *inet_trybind(p_socket ps, const char *address, const char *serv,
+const char *inet_trybind(p_socket ps, int *family, const char *address,
-        struct addrinfo *bindhints)
+    const char *serv, struct addrinfo *bindhints) {
-{
     struct addrinfo *iterator = NULL, *resolved = NULL;
     const char *err = NULL;
-    t_socket sock = *ps;
+    int current_family = *family;
     /* translate luasocket special values to C */
     if (strcmp(address, "*") == 0) address = NULL;
     if (!serv) serv = "0";
@@ -457,30 +464,27 @@ const char *inet_trybind(p_socket ps, const char *address, const char *serv,
     }
     /* iterate over resolved addresses until one is good */
     for (iterator = resolved; iterator; iterator = iterator->ai_next) {
-        if(sock == SOCKET_INVALID) {
+        if (current_family != iterator->ai_family || *ps == SOCKET_INVALID) {
-            err = socket_strerror(socket_create(&sock, iterator->ai_family,
+            socket_destroy(ps);
+            err = socket_strerror(socket_create(ps, iterator->ai_family,
                         iterator->ai_socktype, iterator->ai_protocol));
-            if(err)
+            if (err) continue;
-                continue;
+            current_family = iterator->ai_family;
         }
         /* try binding to local address */
-        err = socket_strerror(socket_bind(&sock,
+        err = socket_strerror(socket_bind(ps, (SA *) iterator->ai_addr,
-            (SA *) iterator->ai_addr,
             (socklen_t) iterator->ai_addrlen));
-
         /* keep trying unless bind succeeded */
-        if (err) {
+        if (err == NULL) {
-            if(sock != *ps)
+            *family = current_family;
-                socket_destroy(&sock);
+            /* set to non-blocking after bind */
-        } else {
+            socket_setnonblocking(ps);
-            /* remember what we connected to, particularly the family */
-            *bindhints = *iterator;
             break;
         }
     }
     /* cleanup and return error */
     freeaddrinfo(resolved);
-    *ps = sock;
+    /* here, if err is set, we failed */
     return err;
 }
 

src/inet.h

@@ -27,8 +27,8 @@ int inet_open(lua_State *L);
 const char *inet_trycreate(p_socket ps, int family, int type);
 const char *inet_tryconnect(p_socket ps, int *family, const char *address,
         const char *serv, p_timeout tm, struct addrinfo *connecthints);
-const char *inet_trybind(p_socket ps, const char *address, const char *serv,
+const char *inet_trybind(p_socket ps, int *family, const char *address,
-        struct addrinfo *bindhints);
+        const char *serv, struct addrinfo *bindhints);
 const char *inet_trydisconnect(p_socket ps, int family, p_timeout tm);
 const char *inet_tryaccept(p_socket server, int family, p_socket client, p_timeout tm);
 

src/socket.lua

@@ -32,7 +32,7 @@ function _M.bind(host, port, backlog)
     err = "no info on address"
     for i, alt in base.ipairs(addrinfo) do
         if alt.family == "inet" then
-            sock, err = socket.tcp()
+            sock, err = socket.tcp4()
         else
             sock, err = socket.tcp6()
         end

src/tcp.c

@@ -18,6 +18,7 @@
 * Internal function prototypes
 \*=========================================================================*/
 static int global_create(lua_State *L);
+static int global_create4(lua_State *L);
 static int global_create6(lua_State *L);
 static int global_connect(lua_State *L);
 static int meth_connect(lua_State *L);
@@ -90,6 +91,7 @@ static t_opt optset[] = {
 /* functions in library namespace */
 static luaL_Reg func[] = {
     {"tcp", global_create},
+    {"tcp4", global_create4},
     {"tcp6", global_create6},
     {"connect", global_connect},
     {NULL, NULL}
@@ -213,8 +215,7 @@ static int meth_accept(lua_State *L)
 /*-------------------------------------------------------------------------*\
 * Binds an object to an address
 \*-------------------------------------------------------------------------*/
-static int meth_bind(lua_State *L)
+static int meth_bind(lua_State *L) {
-{
     p_tcp tcp = (p_tcp) auxiliar_checkclass(L, "tcp{master}", 1);
     const char *address =  luaL_checkstring(L, 2);
     const char *port = luaL_checkstring(L, 3);
@@ -224,7 +225,7 @@ static int meth_bind(lua_State *L)
     bindhints.ai_socktype = SOCK_STREAM;
     bindhints.ai_family = tcp->family;
     bindhints.ai_flags = AI_PASSIVE;
-    err = inet_trybind(&tcp->sock, address, port, &bindhints);
+    err = inet_trybind(&tcp->sock, &tcp->family, address, port, &bindhints);
     if (err) {
         lua_pushnil(L);
         lua_pushstring(L, err);
@@ -237,8 +238,7 @@ static int meth_bind(lua_State *L)
 /*-------------------------------------------------------------------------*\
 * Turns a master tcp object into a client object.
 \*-------------------------------------------------------------------------*/
-static int meth_connect(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);
     const char *port = luaL_checkstring(L, 3);
@@ -279,9 +279,12 @@ static int meth_close(lua_State *L)
 static int meth_getfamily(lua_State *L)
 {
     p_tcp tcp = (p_tcp) auxiliar_checkgroup(L, "tcp{any}", 1);
-    if (tcp->family == PF_INET6) {
+    if (tcp->family == AF_INET6) {
         lua_pushliteral(L, "inet6");
         return 1;
+    } else if (tcp->family == AF_INET) {
+        lua_pushliteral(L, "inet4");
+        return 1;
     } else {
         lua_pushliteral(L, "inet4");
         return 1;
@@ -353,7 +356,12 @@ static int meth_settimeout(lua_State *L)
 \*-------------------------------------------------------------------------*/
 static int tcp_create(lua_State *L, int family) {
     t_socket sock;
-    const char *err = inet_trycreate(&sock, family, SOCK_STREAM);
+    /* if family is AF_UNSPEC, we create an AF_INET socket
+     * but store AF_UNSPEC into tcp-family. This will allow it
+     * later be replaced with an AF_INET6 socket if
+     * trybind or tryconnect prefer it instead. */
+    const char *err = inet_trycreate(&sock, family == AF_UNSPEC?
+        AF_INET: family, SOCK_STREAM);
     /* try to allocate a system socket */
     if (!err) {
         /* allocate tcp object */
@@ -363,7 +371,7 @@ static int tcp_create(lua_State *L, int family) {
         auxiliar_setclass(L, "tcp{master}", -1);
         /* initialize remaining structure fields */
         socket_setnonblocking(&sock);
-        if (family == PF_INET6) {
+        if (family == AF_INET6) {
             int yes = 1;
             setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
                 (void *)&yes, sizeof(yes));
@@ -383,6 +391,10 @@ static int tcp_create(lua_State *L, int family) {
 }
 
 static int global_create(lua_State *L) {
+    return tcp_create(L, AF_UNSPEC);
+}
+
+static int global_create4(lua_State *L) {
     return tcp_create(L, AF_INET);
 }
 
@@ -390,53 +402,6 @@ static int global_create6(lua_State *L) {
     return tcp_create(L, AF_INET6);
 }
 
-#if 0
-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 necessary. if there was no
-         * bind, we need to create one for every new family
-         * that shows up while iterating. if there was a
-         * bind, all families will be the same and we will
-         * not enter this branch. */
-        if (tcp->family != iterator->ai_family) {
-            socket_destroy(&tcp->sock);
-            err = socket_strerror(socket_create(&tcp->sock,
-                iterator->ai_family, iterator->ai_socktype,
-                iterator->ai_protocol));
-            if (err != NULL) {
-                freeaddrinfo(resolved);
-                return err;
-            }
-            tcp->family = iterator->ai_family;
-            /* 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,
-            (socklen_t) 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;
-}
-#endif
-
 static int global_connect(lua_State *L) {
     const char *remoteaddr = luaL_checkstring(L, 1);
     const char *remoteserv = luaL_checkstring(L, 2);
@@ -453,26 +418,26 @@ static int global_connect(lua_State *L) {
     timeout_init(&tcp->tm, -1, -1);
     buffer_init(&tcp->buf, &tcp->io, &tcp->tm);
     tcp->sock = SOCKET_INVALID;
-    tcp->family = PF_UNSPEC;
+    tcp->family = AF_UNSPEC;
     /* allow user to pick local address and port */
     memset(&bindhints, 0, sizeof(bindhints));
     bindhints.ai_socktype = SOCK_STREAM;
     bindhints.ai_family = family;
     bindhints.ai_flags = AI_PASSIVE;
     if (localaddr) {
-        err = inet_trybind(&tcp->sock, localaddr, localserv, &bindhints);
+        err = inet_trybind(&tcp->sock, &tcp->family, localaddr, 
+            localserv, &bindhints);
         if (err) {
             lua_pushnil(L);
             lua_pushstring(L, err);
             return 2;
         }
-        tcp->family = bindhints.ai_family;
     }
     /* 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;
+    connecthints.ai_family = tcp->family; 
     err = inet_tryconnect(&tcp->sock, &tcp->family, remoteaddr, remoteserv,
          &tcp->tm, &connecthints);
     if (err) {

src/udp.c

@@ -27,6 +27,7 @@
 * Internal function prototypes
 \*=========================================================================*/
 static int global_create(lua_State *L);
+static int global_create4(lua_State *L);
 static int global_create6(lua_State *L);
 static int meth_send(lua_State *L);
 static int meth_sendto(lua_State *L);
@@ -107,6 +108,7 @@ static t_opt optget[] = {
 /* functions in library namespace */
 static luaL_Reg func[] = {
     {"udp", global_create},
+    {"udp4", global_create4},
     {"udp6", global_create6},
     {NULL, NULL}
 };
@@ -264,7 +266,7 @@ static int meth_receivefrom(lua_State *L)
 static int meth_getfamily(lua_State *L)
 {
     p_udp udp = (p_udp) auxiliar_checkgroup(L, "udp{any}", 1);
-    if (udp->family == PF_INET6) {
+    if (udp->family == AF_INET6) {
         lua_pushliteral(L, "inet6");
         return 1;
     } else {
@@ -391,7 +393,7 @@ static int meth_setsockname(lua_State *L) {
     bindhints.ai_socktype = SOCK_DGRAM;
     bindhints.ai_family = udp->family;
     bindhints.ai_flags = AI_PASSIVE;
-    err = inet_trybind(&udp->sock, address, port, &bindhints);
+    err = inet_trybind(&udp->sock, &udp->family, address, port, &bindhints);
     if (err) {
         lua_pushnil(L);
         lua_pushstring(L, err);
@@ -409,7 +411,12 @@ static int meth_setsockname(lua_State *L) {
 \*-------------------------------------------------------------------------*/
 static int udp_create(lua_State *L, int family) {
     t_socket sock;
-    const char *err = inet_trycreate(&sock, family, SOCK_DGRAM);
+    /* if family is AF_UNSPEC, we create an AF_INET socket
+     * but store AF_UNSPEC into tcp-family. This will allow it
+     * later be replaced with an AF_INET6 socket if
+     * trybind or tryconnect prefer it instead. */
+    const char *err = inet_trycreate(&sock, family == AF_UNSPEC?
+        AF_INET: family, SOCK_DGRAM);
     /* try to allocate a system socket */
     if (!err) {
         /* allocate udp object */
@@ -417,7 +424,7 @@ static int udp_create(lua_State *L, int family) {
         auxiliar_setclass(L, "udp{unconnected}", -1);
         /* initialize remaining structure fields */
         socket_setnonblocking(&sock);
-        if (family == PF_INET6) {
+        if (family == AF_INET6) {
             int yes = 1;
             setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
                 (void *)&yes, sizeof(yes));
@@ -434,6 +441,10 @@ static int udp_create(lua_State *L, int family) {
 }
 
 static int global_create(lua_State *L) {
+    return udp_create(L, AF_UNSPEC);
+}
+
+static int global_create4(lua_State *L) {
     return udp_create(L, AF_INET);
 }
 

src/usocket.c

@@ -211,6 +211,8 @@ int socket_send(p_socket ps, const char *data, size_t count,
         err = errno;
         /* EPIPE means the connection was closed */
         if (err == EPIPE) return IO_CLOSED;
+        /* EPROTOTYPE means the connection is being closed (on Yosemite!)*/
+        if (err == EPROTOTYPE) continue;
         /* we call was interrupted, just try again */
         if (err == EINTR) continue;
         /* if failed fatal reason, report error */
@@ -239,6 +241,7 @@ int socket_sendto(p_socket ps, const char *data, size_t count, size_t *sent,
         }
         err = errno;
         if (err == EPIPE) return IO_CLOSED;
+        if (err == EPROTOTYPE) continue;
         if (err == EINTR) continue;
         if (err != EAGAIN) return err;
         if ((err = socket_waitfd(ps, WAITFD_W, tm)) != IO_DONE) return err;
@@ -317,6 +320,8 @@ int socket_write(p_socket ps, const char *data, size_t count,
         err = errno;
         /* EPIPE means the connection was closed */
         if (err == EPIPE) return IO_CLOSED;
+        /* EPROTOTYPE means the connection is being closed (on Yosemite!)*/
+        if (err == EPROTOTYPE) continue;
         /* we call was interrupted, just try again */
         if (err == EINTR) continue;
         /* if failed fatal reason, report error */
@@ -410,7 +415,9 @@ const char *socket_strerror(int err) {
         case ECONNABORTED: return PIE_CONNABORTED;
         case ECONNRESET: return PIE_CONNRESET;
         case ETIMEDOUT: return PIE_TIMEDOUT;
-        default: return strerror(err);
+        default: {
+            return strerror(err);
+        }
     }
 }
 

test/testclnt.lua

@@ -447,16 +447,14 @@ end
 
 ------------------------------------------------------------------------
 function rebind_test()
-    --local c ,c1 = socket.bind("localhost", 0)
    local c ,c1 = socket.bind("127.0.0.1", 0)
     if not c then pass ("failed to bind! " .. tostring(c) .. ' ' .. tostring(c1))  return end
 	assert(c,c1)
- 
     local i, p = c:getsockname()
     local s, e = socket.tcp()
     assert(s, e)
     s:setoption("reuseaddr", false)
-    r, e = s:bind("localhost", p)
+    r, e = s:bind(i, p)
     assert(not r, "managed to rebind!")
     assert(e)
     pass("ok")
@@ -593,7 +591,7 @@ function test_writeafterclose()
     while not err do
         sent, err, errsent, time = data:send(str)
     end
-    assert(err == "closed", "should have returned 'closed'")
+    assert(err == "closed", "got " .. err .. " instead of 'closed'")
     pass("ok")
 end
 
@@ -674,6 +672,9 @@ if sock then test_methods(socket.udp6(), udp_methods)
 else io.stderr:write("Warning! IPv6 does not support!\n") end
 end
 
+test("closed connection detection: ")
+test_closed()
+
 test("partial receive")
 test_partialrecv()
 
@@ -697,9 +698,6 @@ rebind_test()
 test("active close: ")
 active_close()
 
-test("closed connection detection: ")
-test_closed()
-
 test("accept function: ")
 accept_timeout()
 accept_errors()

test/udpconnectclnt.lua

@@ -1,7 +1,7 @@
 local socket = require"socket"
 local udp = socket.udp
 local localhost = "127.0.0.1"
-local port = arg[1]
+local port = assert(arg[1], "missing port argument")
 
 se = udp(); se:setoption("reuseaddr", true)
 se:setsockname(localhost, 5062)