[erlang-patches] [PATCH] epmd: support IPv6 node registration
Michael Santos
michael.santos@REDACTED
Wed Aug 8 01:13:59 CEST 2012
Allow IPv6 nodes to register with and query epmd. On systems with
IPv6 support:
* epmd listens on the IPv4 and IPv6 ANY or loopback sockets
* the epmd cli client connects to epmd using the IPv6 loopback
* distributed nodes started with "-proto_dist inet6_tcp" will register
with epmd over IPv6
---
erts/doc/src/epmd.xml | 2 +-
erts/doc/src/erl.xml | 22 +++++
erts/epmd/src/epmd.c | 6 +-
erts/epmd/src/epmd_cli.c | 11 ++-
erts/epmd/src/epmd_int.h | 37 ++++----
erts/epmd/src/epmd_srv.c | 184 +++++++++++++++++++++++++------------
erts/epmd/test/epmd_SUITE.erl | 33 ++++++-
lib/kernel/src/erl_epmd.erl | 18 ++--
lib/kernel/src/inet6_tcp_dist.erl | 2 +-
9 files changed, 222 insertions(+), 93 deletions(-)
diff --git a/erts/doc/src/epmd.xml b/erts/doc/src/epmd.xml
index 3e70054..3c9313e 100644
--- a/erts/doc/src/epmd.xml
+++ b/erts/doc/src/epmd.xml
@@ -36,7 +36,7 @@
<comsummary>
<p>Erlang Port Mapper Daemon</p>
<taglist>
- <tag><c><![CDATA[epmd [-d|-debug] [DbgExtra...] [-port No] [-daemon] [-relaxed_command_check]]]></c></tag>
+ <tag><c><![CDATA[epmd [-d|-debug] [DbgExtra...] [-address Addresses] [-port No] [-daemon] [-relaxed_command_check]]]></c></tag>
<item>
<p>Starts the port mapper daemon</p>
</item>
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 6221a23..09dc81e 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -381,6 +381,28 @@
similar to <c><![CDATA[code:add_pathsz/1]]></c>. See
<seealso marker="kernel:code">code(3)</seealso>.</p>
</item>
+ <tag><c><![CDATA[-proto_dist Proto]]></c></tag>
+ <item>
+ <p>Specify a protocol for Erlang distribution.</p>
+ <taglist>
+ <tag><c>inet_tcp</c></tag>
+ <item>
+ <p>TCP over IPv4 (the default)</p>
+ </item>
+ <tag><c>inet_ssl</c></tag>
+ <item>
+ <p>distribution over SSL</p>
+ </item>
+ <tag><c>inet6_tcp</c></tag>
+ <item>
+ <p>TCP over IPv6</p>
+ </item>
+ </taglist>
+ <p>For example, to start up IPv6 distributed nodes:</p>
+<pre>
+% <input>erl -name test@REDACTED -proto_dist inet6_tcp</input>
+</pre>
+ </item>
<tag><c><![CDATA[-remsh Node]]></c></tag>
<item>
<p>Starts Erlang with a remote shell connected to <c><![CDATA[Node]]></c>.</p>
diff --git a/erts/epmd/src/epmd.c b/erts/epmd/src/epmd.c
index 2267f9b..e2bba09 100644
--- a/erts/epmd/src/epmd.c
+++ b/erts/epmd/src/epmd.c
@@ -335,10 +335,10 @@ static void run_daemon(EpmdVars *g)
for (fd = 0; fd < g->max_conn ; fd++) /* close all files ... */
close(fd);
/* Syslog on linux will try to write to whatever if we dont
- inform it of that the log is closed. */
+ inform it that the log is closed. */
closelog();
- /* These chouldn't be needed but for safety... */
+ /* These shouldn't be needed but for safety... */
open("/dev/null", O_RDONLY); /* Order is important! */
open("/dev/null", O_WRONLY);
@@ -379,7 +379,7 @@ static void run_daemon(EpmdVars *g)
close(1);
close(2);
- /* These chouldn't be needed but for safety... */
+ /* These shouldn't be needed but for safety... */
open("nul", O_RDONLY);
open("nul", O_WRONLY);
diff --git a/erts/epmd/src/epmd_cli.c b/erts/epmd/src/epmd_cli.c
index 74408e3..e46a700 100644
--- a/erts/epmd/src/epmd_cli.c
+++ b/erts/epmd/src/epmd_cli.c
@@ -132,6 +132,7 @@ void epmd_call(EpmdVars *g,int what)
static int conn_to_epmd(EpmdVars *g)
{
struct EPMD_SOCKADDR_IN address;
+ size_t salen = 0;
int connect_sock;
connect_sock = socket(FAMILY, SOCK_STREAM, 0);
@@ -140,10 +141,16 @@ static int conn_to_epmd(EpmdVars *g)
{ /* store port number in unsigned short */
unsigned short sport = g->port;
- SET_ADDR(address, EPMD_ADDR_LOOPBACK, sport);
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ SET_ADDR6(address, in6addr_loopback, sport);
+ salen = sizeof(struct sockaddr_in6);
+#else
+ SET_ADDR(address, htonl(INADDR_LOOPBACK), sport);
+ salen = sizeof(struct sockaddr_in);
+#endif
}
- if (connect(connect_sock, (struct sockaddr*)&address, sizeof address) < 0)
+ if (connect(connect_sock, (struct sockaddr*)&address, salen) < 0)
goto error;
return connect_sock;
diff --git a/erts/epmd/src/epmd_int.h b/erts/epmd/src/epmd_int.h
index 14d05c3..64973b6 100644
--- a/erts/epmd/src/epmd_int.h
+++ b/erts/epmd/src/epmd_int.h
@@ -165,33 +165,32 @@
/* ************************************************************************ */
/* Macros that let us use IPv6 */
-#if defined(HAVE_IN6) && defined(AF_INET6) && defined(EPMD6)
+#define IS_ADDR_LOOPBACK(addr) ((addr).s_addr == htonl(INADDR_LOOPBACK))
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
-#define EPMD_SOCKADDR_IN sockaddr_in6
-#define EPMD_IN_ADDR in6_addr
-#define EPMD_S_ADDR s6_addr
-#define EPMD_ADDR_LOOPBACK in6addr_loopback.s6_addr
-#define EPMD_ADDR_ANY in6addr_any.s6_addr
+#define EPMD_SOCKADDR_IN sockaddr_storage
#define FAMILY AF_INET6
-#define SET_ADDR(dst, addr, port) do { \
- memset((char*)&(dst), 0, sizeof(dst)); \
- memcpy((char*)&(dst).sin6_addr.s6_addr, (char*)&(addr), 16); \
- (dst).sin6_family = AF_INET6; \
- (dst).sin6_flowinfo = 0; \
- (dst).sin6_port = htons(port); \
+#define SET_ADDR6(dst, addr, port) do { \
+ struct sockaddr_in6 *sa = (struct sockaddr_in6 *)&(dst); \
+ memset(sa, 0, sizeof(dst)); \
+ sa->sin6_family = AF_INET6; \
+ sa->sin6_addr = (addr); \
+ sa->sin6_port = htons(port); \
} while(0)
-#define IS_ADDR_LOOPBACK(addr) \
- (memcmp((addr).s6_addr, in6addr_loopback.s6_addr, 16) == 0)
+#define SET_ADDR(dst, addr, port) do { \
+ struct sockaddr_in *sa = (struct sockaddr_in *)&(dst); \
+ memset(sa, 0, sizeof(dst)); \
+ sa->sin_family = AF_INET; \
+ sa->sin_addr.s_addr = (addr); \
+ sa->sin_port = htons(port); \
+ } while(0)
#else /* Not IP v6 */
#define EPMD_SOCKADDR_IN sockaddr_in
-#define EPMD_IN_ADDR in_addr
-#define EPMD_S_ADDR s_addr
-#define EPMD_ADDR_LOOPBACK htonl(INADDR_LOOPBACK)
-#define EPMD_ADDR_ANY htonl(INADDR_ANY)
#define FAMILY AF_INET
#define SET_ADDR(dst, addr, port) do { \
@@ -201,8 +200,6 @@
(dst).sin_port = htons(port); \
} while(0)
-#define IS_ADDR_LOOPBACK(addr) ((addr).s_addr == htonl(INADDR_LOOPBACK))
-
#endif /* Not IP v6 */
/* ************************************************************************ */
diff --git a/erts/epmd/src/epmd_srv.c b/erts/epmd/src/epmd_srv.c
index da575af..538706b 100644
--- a/erts/epmd/src/epmd_srv.c
+++ b/erts/epmd/src/epmd_srv.c
@@ -69,6 +69,7 @@ static time_t current_time(EpmdVars*);
static Connection *conn_init(EpmdVars*);
static int conn_open(EpmdVars*,int);
+static int conn_local_peer_check(EpmdVars*, int);
static int conn_close_fd(EpmdVars*,int);
static void node_init(EpmdVars*);
@@ -92,7 +93,7 @@ void run(EpmdVars *g)
{
struct EPMD_SOCKADDR_IN iserv_addr[MAX_LISTEN_SOCKETS];
int listensock[MAX_LISTEN_SOCKETS];
- int num_sockets;
+ int num_sockets = 0;
int i;
int opt;
unsigned short sport = g->port;
@@ -105,64 +106,82 @@ void run(EpmdVars *g)
if (g->addresses != NULL && /* String contains non-separator characters if: */
g->addresses[strspn(g->addresses," ,")] != '\000')
{
- char *tmp;
- char *token;
- int loopback_ok = 0;
+ char *tmp = NULL;
+ char *token = NULL;
+
+ /* Always listen on the loopback. */
+ SET_ADDR(iserv_addr[num_sockets],htonl(INADDR_LOOPBACK),sport);
+ num_sockets++;
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ SET_ADDR6(iserv_addr[num_sockets],in6addr_loopback,sport);
+ num_sockets++;
+#endif
- if ((tmp = (char *)malloc(strlen(g->addresses) + 1)) == NULL)
+ if ((tmp = strdup(g->addresses)) == NULL)
{
dbg_perror(g,"cannot allocate memory");
epmd_cleanup_exit(g,1);
}
- strcpy(tmp,g->addresses);
- for(token = strtok(tmp,", "), num_sockets = 0;
+ for(token = strtok(tmp,", ");
token != NULL;
- token = strtok(NULL,", "), num_sockets++)
+ token = strtok(NULL,", "))
{
- struct EPMD_IN_ADDR addr;
-#ifdef HAVE_INET_PTON
- int ret;
+ struct in_addr addr;
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ struct in6_addr addr6;
+ struct sockaddr_storage *sa = &iserv_addr[num_sockets];
- if ((ret = inet_pton(FAMILY,token,&addr)) == -1)
+ if (inet_pton(AF_INET,token,&addr) == 1)
{
- dbg_perror(g,"cannot convert IP address to network format");
- epmd_cleanup_exit(g,1);
+ SET_ADDR(iserv_addr[num_sockets],addr.s_addr,sport);
+ }
+ else if (inet_pton(AF_INET6,token,&addr6) == 1)
+ {
+ SET_ADDR6(iserv_addr[num_sockets],addr6,sport);
+ }
+ else
+#else
+ if ((addr.s_addr = inet_addr(token)) != INADDR_NONE)
+ {
+ SET_ADDR(iserv_addr[num_sockets],addr.s_addr,sport);
}
- else if (ret == 0)
-#elif !defined(EPMD6)
- if ((addr.EPMD_S_ADDR = inet_addr(token)) == INADDR_NONE)
+ else
#endif
{
dbg_tty_printf(g,0,"cannot parse IP address \"%s\"",token);
epmd_cleanup_exit(g,1);
}
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ if (sa->ss_family == AF_INET6 && IN6_IS_ADDR_LOOPBACK(&addr6))
+ continue;
+
+ if (sa->ss_family == AF_INET)
+#endif
if (IS_ADDR_LOOPBACK(addr))
- loopback_ok = 1;
+ continue;
- if (num_sockets - loopback_ok == MAX_LISTEN_SOCKETS - 1)
+ num_sockets++;
+
+ if (num_sockets >= MAX_LISTEN_SOCKETS)
{
dbg_tty_printf(g,0,"cannot listen on more than %d IP addresses",
MAX_LISTEN_SOCKETS);
epmd_cleanup_exit(g,1);
}
-
- SET_ADDR(iserv_addr[num_sockets],addr.EPMD_S_ADDR,sport);
}
free(tmp);
-
- if (!loopback_ok)
- {
- SET_ADDR(iserv_addr[num_sockets],EPMD_ADDR_LOOPBACK,sport);
- num_sockets++;
- }
}
else
{
- SET_ADDR(iserv_addr[0],EPMD_ADDR_ANY,sport);
- num_sockets = 1;
+ SET_ADDR(iserv_addr[num_sockets],htonl(INADDR_ANY),sport);
+ num_sockets++;
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ SET_ADDR6(iserv_addr[num_sockets],in6addr_any,sport);
+ num_sockets++;
+#endif
}
#if !defined(__WIN32__)
@@ -183,13 +202,33 @@ void run(EpmdVars *g)
for (i = 0; i < num_sockets; i++)
{
- if ((listensock[i] = socket(FAMILY,SOCK_STREAM,0)) < 0)
+ struct sockaddr *sa = (struct sockaddr *)&iserv_addr[i];
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ size_t salen = (sa->sa_family == AF_INET6 ?
+ sizeof(struct sockaddr_in6) :
+ sizeof(struct sockaddr_in));
+#else
+ size_t salen = sizeof(struct sockaddr_in);
+#endif
+
+ if ((listensock[i] = socket(sa->sa_family,SOCK_STREAM,0)) < 0)
{
dbg_perror(g,"error opening stream socket");
epmd_cleanup_exit(g,1);
}
g->listenfd[i] = listensock[i];
-
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ opt = 1;
+ if (sa->sa_family == AF_INET6 &&
+ setsockopt(listensock[i],IPPROTO_IPV6,IPV6_V6ONLY,&opt,
+ sizeof(opt)) <0)
+ {
+ dbg_perror(g,"can't set IPv6 only socket option");
+ epmd_cleanup_exit(g,1);
+ }
+#endif
+
/*
* Note that we must not enable the SO_REUSEADDR on Windows,
* because addresses will be reused even if they are still in use.
@@ -221,8 +260,7 @@ void run(EpmdVars *g)
dbg_perror(g,"failed to set non-blocking mode of listening socket %d",
listensock[i]);
- if (bind(listensock[i], (struct sockaddr*) &iserv_addr[i],
- sizeof(iserv_addr[i])) < 0)
+ if (bind(listensock[i], (struct sockaddr*) &iserv_addr[i], salen) < 0)
{
if (errno == EADDRINUSE)
{
@@ -818,15 +856,6 @@ static int conn_open(EpmdVars *g,int fd)
for (i = 0; i < g->max_conn; i++) {
if (g->conn[i].open == EPMD_FALSE) {
- struct sockaddr_in si;
- struct sockaddr_in di;
-#ifdef HAVE_SOCKLEN_T
- socklen_t st;
-#else
- int st;
-#endif
- st = sizeof(si);
-
g->active_conn++;
s = &g->conn[i];
@@ -837,20 +866,7 @@ static int conn_open(EpmdVars *g,int fd)
s->open = EPMD_TRUE;
s->keep = EPMD_FALSE;
- /* Determine if connection is from localhost */
- if (getpeername(s->fd,(struct sockaddr*) &si,&st) ||
- st < sizeof(si)) {
- /* Failure to get peername is regarded as non local host */
- s->local_peer = EPMD_FALSE;
- } else {
- /* Only 127.x.x.x and connections from the host's IP address
- allowed, no false positives */
- s->local_peer =
- (((((unsigned) ntohl(si.sin_addr.s_addr)) & 0xFF000000U) ==
- 0x7F000000U) ||
- (getsockname(s->fd,(struct sockaddr*) &di,&st) ?
- EPMD_FALSE : si.sin_addr.s_addr == di.sin_addr.s_addr));
- }
+ s->local_peer = conn_local_peer_check(g, s->fd);
dbg_tty_printf(g,2,(s->local_peer) ? "Local peer connected" :
"Non-local peer connected");
@@ -858,7 +874,7 @@ static int conn_open(EpmdVars *g,int fd)
s->got = 0;
s->mod_time = current_time(g); /* Note activity */
- s->buf = (char *)malloc(INBUF_SIZE);
+ s->buf = malloc(INBUF_SIZE);
if (s->buf == NULL) {
dbg_printf(g,0,"epmd: Insufficient memory");
@@ -876,6 +892,60 @@ static int conn_open(EpmdVars *g,int fd)
return EPMD_FALSE;
}
+static int conn_local_peer_check(EpmdVars *g, int fd)
+{
+ struct EPMD_SOCKADDR_IN si;
+ struct EPMD_SOCKADDR_IN di;
+
+ struct sockaddr_in *si4 = (struct sockaddr_in *)&si;
+ struct sockaddr_in *di4 = (struct sockaddr_in *)&di;
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&si;
+ struct sockaddr_in6 *di6 = (struct sockaddr_in6 *)&di;
+#endif
+
+#ifdef HAVE_SOCKLEN_T
+ socklen_t st;
+#else
+ int st;
+#endif
+
+ st = sizeof(si);
+
+ /* Determine if connection is from localhost */
+ if (getpeername(fd,(struct sockaddr*) &si,&st) ||
+ st > sizeof(si)) {
+ /* Failure to get peername is regarded as non local host */
+ return EPMD_FALSE;
+ }
+
+ /* Only 127.x.x.x and connections from the host's IP address
+ allowed, no false positives */
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ if (si.ss_family == AF_INET6 && IN6_IS_ADDR_LOOPBACK(&(si6->sin6_addr)))
+ return EPMD_TRUE;
+
+ if (si.ss_family == AF_INET)
+#endif
+ if ((((unsigned) ntohl(si4->sin_addr.s_addr)) & 0xFF000000U) ==
+ 0x7F000000U)
+ return EPMD_TRUE;
+
+ if (getsockname(fd,(struct sockaddr*) &di,&st))
+ return EPMD_FALSE;
+
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ if (si.ss_family == AF_INET6)
+ return IN6_ARE_ADDR_EQUAL( &(si6->sin6_addr), &(di6->sin6_addr));
+ if (si.ss_family == AF_INET)
+#endif
+ return si4->sin_addr.s_addr == di4->sin_addr.s_addr;
+#if defined(HAVE_IN6) && defined(AF_INET6)
+ return EPMD_FALSE;
+#endif
+}
+
static int conn_close_fd(EpmdVars *g,int fd)
{
int i;
diff --git a/erts/epmd/test/epmd_SUITE.erl b/erts/epmd/test/epmd_SUITE.erl
index 3f31cd9..5821cd8 100644
--- a/erts/epmd/test/epmd_SUITE.erl
+++ b/erts/epmd/test/epmd_SUITE.erl
@@ -42,6 +42,7 @@
-export(
[
register_name/1,
+ register_name_ipv6/1,
register_names_1/1,
register_names_2/1,
register_duplicate_name/1,
@@ -106,7 +107,8 @@
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [register_name, register_names_1, register_names_2,
+ [register_name, register_name_ipv6,
+ register_names_1, register_names_2,
register_duplicate_name, get_port_nr, slow_get_port_nr,
unregister_others_name_1, unregister_others_name_2,
register_overflow, name_with_null_inside,
@@ -162,6 +164,24 @@ register_name(Config) when is_list(Config) ->
?line ok = close(Sock), % Unregister
ok.
+register_name_ipv6(doc) ->
+ ["Register a name over IPv6"];
+register_name_ipv6(suite) ->
+ [];
+register_name_ipv6(Config) when is_list(Config) ->
+ % Test if the host has an IPv6 loopback address
+ Res = gen_tcp:listen(0, [inet6, {ip, {0,0,0,0,0,0,0,1}}]),
+ case Res of
+ {ok,LSock} ->
+ gen_tcp:close(LSock),
+ ?line ok = epmdrun(),
+ ?line {ok,Sock} = register_node6("foobar6"),
+ ?line ok = close(Sock), % Unregister
+ ok;
+ _Error ->
+ {skip, "Host does not have an IPv6 loopback address"}
+ end.
+
register_names_1(doc) ->
["Register and unregister two nodes"];
register_names_1(suite) ->
@@ -204,12 +224,17 @@ register_node(Name) ->
register_node(Name,Port) ->
register_node_v2(Port,$M,0,5,5,Name,"").
+register_node6(Name) ->
+ register_node_v2({0,0,0,0,0,0,0,1},?DUMMY_PORT,$M,0,5,5,Name,"").
+
register_node_v2(Port, NodeType, Prot, HVsn, LVsn, Name, Extra) ->
+ register_node_v2("localhost", Port, NodeType, Prot, HVsn, LVsn, Name, Extra).
+register_node_v2(Addr, Port, NodeType, Prot, HVsn, LVsn, Name, Extra) ->
Req = [?EPMD_ALIVE2_REQ, put16(Port), NodeType, Prot,
put16(HVsn), put16(LVsn),
size16(Name), Name,
size16(Extra), Extra],
- case send_req(Req) of
+ case send_req(Req, Addr) of
{ok,Sock} ->
case recv(Sock,4) of
{ok, [?EPMD_ALIVE2_RESP,_Res=0,_C0,_C1]} ->
@@ -1092,7 +1117,9 @@ send_direct(Sock, Bytes) ->
end.
send_req(Req) ->
- case connect() of
+ send_req(Req, "localhost").
+send_req(Req, Addr) ->
+ case connect(Addr) of
{ok,Sock} ->
case send(Sock, [size16(Req), Req]) of
ok ->
diff --git a/lib/kernel/src/erl_epmd.erl b/lib/kernel/src/erl_epmd.erl
index 91af49f..21a3dec 100644
--- a/lib/kernel/src/erl_epmd.erl
+++ b/lib/kernel/src/erl_epmd.erl
@@ -31,7 +31,7 @@
%% External exports
-export([start/0, start_link/0, stop/0, port_please/2,
port_please/3, names/0, names/1,
- register_node/2, open/0, open/1, open/2]).
+ register_node/2, register_node/3, open/0, open/1, open/2]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
@@ -106,7 +106,9 @@ names1(HostName) ->
register_node(Name, PortNo) ->
- gen_server:call(erl_epmd, {register, Name, PortNo}, infinity).
+ register_node(Name, PortNo, inet).
+register_node(Name, PortNo, Family) ->
+ gen_server:call(erl_epmd, {register, Name, PortNo, Family}, infinity).
%%%----------------------------------------------------------------------
%%% Callback functions from gen_server
@@ -124,10 +126,10 @@ init(_) ->
-spec handle_call(calls(), term(), state()) ->
{'reply', term(), state()} | {'stop', 'shutdown', 'ok', state()}.
-handle_call({register, Name, PortNo}, _From, State) ->
+handle_call({register, Name, PortNo, Family}, _From, State) ->
case State#state.socket of
P when P < 0 ->
- case do_register_node(Name, PortNo) of
+ case do_register_node(Name, PortNo, Family) of
{alive, Socket, Creation} ->
S = State#state{socket = Socket,
port_no = PortNo,
@@ -210,8 +212,12 @@ open({A,B,C,D,E,F,G,H}=EpmdAddr, Timeout) when ?ip6(A,B,C,D,E,F,G,H) ->
close(Socket) ->
gen_tcp:close(Socket).
-do_register_node(NodeName, TcpPort) ->
- case open() of
+do_register_node(NodeName, TcpPort, Family) ->
+ Localhost = case Family of
+ inet -> open({127,0,0,1});
+ inet6 -> open({0,0,0,0,0,0,0,1})
+ end,
+ case Localhost of
{ok, Socket} ->
Name = to_string(NodeName),
Extra = "",
diff --git a/lib/kernel/src/inet6_tcp_dist.erl b/lib/kernel/src/inet6_tcp_dist.erl
index b9c4fa6..0b5fb44 100644
--- a/lib/kernel/src/inet6_tcp_dist.erl
+++ b/lib/kernel/src/inet6_tcp_dist.erl
@@ -71,7 +71,7 @@ listen(Name) ->
{ok, Socket} ->
TcpAddress = get_tcp_address(Socket),
{_,Port} = TcpAddress#net_address.address,
- {ok, Creation} = erl_epmd:register_node(Name, Port),
+ {ok, Creation} = erl_epmd:register_node(Name, Port, inet6),
{ok, {Socket, TcpAddress, Creation}};
Error ->
Error
--
1.7.9.5
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