diff options
Diffstat (limited to 'erts/doc/src/erl_dist_protocol.xml')
| -rw-r--r-- | erts/doc/src/erl_dist_protocol.xml | 60 |
1 files changed, 49 insertions, 11 deletions
diff --git a/erts/doc/src/erl_dist_protocol.xml b/erts/doc/src/erl_dist_protocol.xml index f924c8a70b..0c1100d394 100644 --- a/erts/doc/src/erl_dist_protocol.xml +++ b/erts/doc/src/erl_dist_protocol.xml @@ -109,7 +109,8 @@ <title>Register a Node in EPMD</title> <p>When a distributed node is started it registers itself in the EPMD. The message <c>ALIVE2_REQ</c> described below is sent from the node to - the EPMD. The response from the EPMD is <c>ALIVE2_RESP</c>.</p> + the EPMD. The response from the EPMD is <c>ALIVE2_X_RESP</c> (or + <c>ALIVE2_RESP</c>).</p> <table align="left"> <row> @@ -155,12 +156,12 @@ <tag><c>HighestVersion</c></tag> <item> <p>The highest distribution version that this node can handle. - The value in Erlang/OTP R6B and later is 5.</p> + The value in OTP 23 and later is 6.</p> </item> <tag><c>LowestVersion</c></tag> <item> <p>The lowest distribution version that this node can handle. - The value in Erlang/OTP R6B and later is 5.</p> + The value in OTP 23 and later is 5.</p> </item> <tag><c>Nlen</c></tag> <item> @@ -184,7 +185,24 @@ node is a distributed node. When the connection is closed, the node is automatically unregistered from the EPMD.</p> - <p>The response message <c>ALIVE2_RESP</c> is as follows:</p> + <p>The response message is either <c>ALIVE2_X_RESP</c> or + <c>ALIVE2_RESP</c> depending on distribution version. If both the node + and EPMD support distribution version 6 then response is + <c>ALIVE2_X_RESP</c> otherwise it is the older <c>ALIVE2_RESP</c>:</p> + + <table align="left"> + <row> + <cell align="center">1</cell> + <cell align="center">1</cell> + <cell align="center">4</cell> + </row> + <row> + <cell align="center"><c>118</c></cell> + <cell align="center"><c>Result</c></cell> + <cell align="center"><c>Creation</c></cell> + </row> + <tcaption>ALIVE2_X_RESP (118) with 32 bit creation</tcaption> + </table> <table align="left"> <row> @@ -197,7 +215,7 @@ <cell align="center"><c>Result</c></cell> <cell align="center"><c>Creation</c></cell> </row> - <tcaption>ALIVE2_RESP (121)</tcaption> + <tcaption>ALIVE2_RESP (121) with 16-bit creation</tcaption> </table> <p>Result = 0 -> ok, result > 0 -> error.</p> @@ -793,7 +811,8 @@ DiB == gen_digest(ChA, ICA)? </item> <tag><c>-define(DFLAG_NEW_FUN_TAGS,16#80).</c></tag> <item> - <p>The node understand new fun tags.</p> + <p>The node understands the <seealso marker="erl_ext_dist#NEW_FUN_EXT"> + <c>NEW_FUN_EXT</c></seealso> tag.</p> </item> <tag><c>-define(DFLAG_EXTENDED_PIDS_PORTS,16#100).</c></tag> <item> @@ -802,13 +821,18 @@ DiB == gen_digest(ChA, ICA)? </item> <tag><c>-define(DFLAG_EXPORT_PTR_TAG,16#200).</c></tag> <item> + <p>The node understands the <seealso marker="erl_ext_dist#EXPORT_EXT"> + <c>EXPORT_EXT</c></seealso> tag.</p> </item> <tag><c>-define(DFLAG_BIT_BINARIES,16#400).</c></tag> <item> + <p>The node understands the <seealso marker="erl_ext_dist#BIT_BINARY_EXT"> + <c>BIT_BINARY_EXT</c></seealso> tag.</p> </item> <tag><c>-define(DFLAG_NEW_FLOATS,16#800).</c></tag> <item> - <p>The node understands new float format.</p> + <p>The node understands the <seealso marker="erl_ext_dist#NEW_FLOAT_EXT"> + <c>NEW_FLOAT_EXT</c></seealso> tag.</p> </item> <tag><c>-define(DFLAG_UNICODE_IO,16#1000).</c></tag> <item> @@ -817,21 +841,34 @@ DiB == gen_digest(ChA, ICA)? <item> <p>The node implements atom cache in distribution header.</p> </item> + <marker id="DFLAG_SMALL_ATOM_TAGS"/> <tag><c>-define(DFLAG_SMALL_ATOM_TAGS, 16#4000).</c></tag> <item> - <p>The node understand the <c>SMALL_ATOM_EXT</c> tag.</p> + <p>The node understands the <seealso marker="erl_ext_dist#SMALL_ATOM_EXT"> + <c>SMALL_ATOM_EXT</c></seealso> tag.</p> </item> + <marker id="DFLAG_UTF8_ATOMS"/> <tag><c>-define(DFLAG_UTF8_ATOMS, 16#10000).</c></tag> <item> - <p>The node understand UTF-8 encoded atoms.</p> + <p>The node understands UTF-8 atoms encoded with + <seealso marker="erl_ext_dist#ATOM_UTF8_EXT"> + <c>ATOM_UTF8_EXT</c></seealso> and + <seealso marker="erl_ext_dist#SMALL_ATOM_UTF8_EXT"> + <c>SMALL ATOM_UTF8_EXT</c></seealso>.</p> </item> <tag><c>-define(DFLAG_MAP_TAG, 16#20000).</c></tag> <item> - <p>The node understand the map tag.</p> + <p>The node understands the map tag + <seealso marker="erl_ext_dist#MAP_EXT"><c>MAP_EXT</c></seealso>.</p> </item> + <marker id="DFLAG_BIG_CREATION"/> <tag><c>-define(DFLAG_BIG_CREATION, 16#40000).</c></tag> <item> - <p>The node understand big node creation.</p> + <p>The node understands big node creation tags + <seealso marker="erl_ext_dist#NEW_PID_EXT"><c>NEW_PID_EXT</c></seealso>, + <seealso marker="erl_ext_dist#NEW_PORT_EXT"><c>NEW_PORT_EXT</c></seealso> and + <seealso marker="erl_ext_dist#NEWER_REFERENCE_EXT"><c>NEWER_REFERENCE_EXT</c></seealso>. + </p> </item> <tag><c>-define(DFLAG_SEND_SENDER, 16#80000).</c></tag> <item> @@ -855,6 +892,7 @@ DiB == gen_digest(ChA, ICA)? <seealso marker="#control_message">control message</seealso>s instead of the non-PAYLOAD variants.</p> </item> + <marker id="DFLAG_FRAGMENTS"/> <tag><c>-define(DFLAG_FRAGMENTS, 16#800000).</c></tag> <item> <p>Use <seealso marker="erl_ext_dist#fragments">fragmented</seealso> |