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2019-04-09Revert "epmd: Support 32-bit creation values in local node"Sverker Eriksson
This reverts commit bd8f6106d44a58c261920eef72842bb3bc5a4968. PLUS a little change in epmd_srv.c:750 ("4" -> "replylen") that was part of e2cf4a8a4b03b9f430ba228276c3b2629159e832 by mistake.
2019-03-22epmd: Support 32-bit creation values in local nodeSverker Eriksson
* Increase distribution version from 5 to 6 * Introduce new ALIVE2_X_RESP with 32-bit creation as reply to ALIVE2_REQ when sender dist version >= 6 * Still reply old ALIVE2_RESP with tiny creation 1..3 if sender dist version < 6.
2019-03-22erts: Robustify epmd reply functionSverker Eriksson
2016-04-14Merge branch 'binarin/erts/fix-epmd-systemd-notifications/PR-999/OTP-13493'Björn-Egil Dahlberg
* binarin/erts/fix-epmd-systemd-notifications/PR-999/OTP-13493: Don't send unasked for systemd notifications
2016-03-29Don't send unasked for systemd notificationsAlexey Lebedeff
Suppose we have some erlang system that uses systemd unit with Type=notify - so this should send startup confirmation itself. But if systemd-enabled epmd will be started as a first step of that system startup, empd startup confirmation will be misinterpeted by systemd. And our erlang service will be considered 'ready' to early. Also this will interefere with systemd MAINPID detection: systemd will be monitoring `epmd` process instead of `beam` one. For example, rabbitmq works around this issue by starting epmd using separate short-lived beam process, with NOTIFY_SOCKET environment variable reset - only in this way we could be sure that epmd will not interfere with rabbit startup sequence. This patch disables indiscriminate confirmation sending, and does it only when it was explicitly asked to do so.
2016-03-15update copyright-yearHenrik Nord
2016-03-02Merge branch 'maint'Ingela Anderton Andin
2016-03-02Skips any sockets with unsupported protocols.Ingela Anderton Andin
Patch from end of PR 864 Fixes problem reported in the PR by jeckersb In this error case, a negative file descriptor is now saved at listensock[i], which leads to a buffer overflow later on at https://github.com/msantos/otp/blob/epmd-IPv6-node-reg2/erts/epmd/src/epmd_srv.c#L498 when calling FD_ISSET(listensock[i],&read_mask). To reproduce this: Completely disable IPv6 with ipv6.disable=1 on the kernel command line Build with fortified code (RHEL/CentOS default): CFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fno-strict-aliasing'
2016-03-01Merge branch 'maint'Ingela Anderton Andin
2016-02-10epmd: support IPv6 node registrationMichael Santos
Allow IPv6 nodes to register with and query epmd. On systems with IPv6 support: * epmd listens on both the IPv4 and IPv6 ANY or loopback sockets * the epmd cli client connects to epmd over the IPv6 loopback * distributed nodes started with "-proto_dist inet6_tcp" will register with epmd over IPv6 To work on IPv6 capable systems that have IPv6 support disabled, epmd ignores errors opening the socket if the protocol is not supported. Similarly, the epmd client will fall back to IPv4 if the IPv6 socket is not available. Update the minimum supported version of Windows to Windows Vista to support IPv6.
2016-02-04Merge branch 'maint'Zandra
2016-02-04Merge branch 'binarin/epmd-race' into maintZandra
* binarin/epmd-race: Prevent down nodes going undetected in epmd OTP-13301
2015-12-28Merge branch 'maint'Zandra
2015-12-15Prevent down nodes going undetected in epmdAlexey Lebedeff
In the following (rare) case down node will be always registered in epmd: - client connects to epmd and sends ALIVE2 request - epmd reads this request and starts to process it - during that time client socket closes in such way that subsequent write(2) in epmd will result in error - at this point we have node that was registered in database, but as the connection struct has no 'keep' flag set, the do_read() closes connection and removes it from select fdset - and so there is no way for this node to be cleaned up later. We've seen several epmd instances in such state on our production systems. And while I'm not sure what was the exact sequence of events that leads to failed write(2), issue could be easily reproduced using SO_LINGER option for socket.
2015-12-14Don't wait for twice the delay_write timeoutAlexey Lebedeff
This happens only during processing ALIVE2 request. reply() already performs the same delay as in the deleted code.
2015-07-10ose: Remove all code related to the OSE portLukas Larsson
The OSE port is no longer supported and this commit removed it and any changes related to it. The things that were general improvements have been left in the code.
2015-06-18Change license text to APLv2Bruce Yinhe
2014-11-24epmd: Unify systemd autoconf macros usagePeter Lemenkov
Don't use both HAVE_SYSTEMD_DAEMON and HAVE_SYSTEMD_SD_DAEMON - use only the former one and remove the latter one entirely. Signed-off-by: Peter Lemenkov <[email protected]>
2014-11-24epmd: Added systemd notify support to EPMDPeter Lemenkov
Signed-off-by: Peter Lemenkov <[email protected]>
2014-05-09erts: Fix various autoconf issuesLukas Larsson
* Check of atomics on bsd * Add --enable-systemd for epmd * Remove unused --enable-tsp option
2014-03-27Merge branch 'matwey/systemd/OTP-11829'Lukas Larsson
* matwey/systemd/OTP-11829: Add systemd socket activation for epmd. Conflicts: erts/epmd/src/epmd_int.h Extra ticket: OTP-11828
2014-02-24Added support for ENEA OSELukas Larsson
This port has support for both non-smp and smp. It contains a new way to do io checking in which erts_poll_wait receives the payload of the polled entity. This has implications for all linked-in drivers.
2014-02-19Add systemd socket activation for epmd.Matwey V. Kornilov
Check for systemd libraries and headers in confgiure. Add -systemd option enabling waiting for sockets from systemd.
2013-01-25Update copyright yearsBjörn-Egil Dahlberg
2013-01-22Add UTF-8 node name support for epmdRickard Green
2012-09-07Replace sprintf with erts_snprintf in epmdBjörn-Egil Dahlberg
2011-07-13Let epmd ignore empty ERL_EPMD_ADDRESSHolger Weiß
If the environment variable ERL_EPMD_ADDRESS is set to the empty string, empd now behaves like it does by default when ERL_EPMD_ADDRESS is unset. That is, in this case, epmd now listens on all available interfaces instead of using only the loopback interface, which happened because epmd added the loopback address to the (in this case empty) list of addresses specified via ERL_EPMD_ADDRESS. Also, epmd now ignores ERL_EPMD_ADDRESS if it contains only separator characters (comma and space). The same applies to epmd's -address option.
2011-07-27Fix epmd crash on vxworks caused by faulty argument to selectSverker Eriksson
The first argument g->max_conn to select() in epmd_srv.c seems to be wrong as it excludes the listening socket(s). Instead we keep track of the highest fd seen. However I still don't understand why select() started to fail for vxworks with R14B03 when the feature of more than one listening socket was introduced. The default is still 1 listening socket (num_sockets=1), which would make the first argument to select() unchanged.
2011-04-08Merge branch 'ms/epmd-local-access-check' into devHenrik Nord
* ms/epmd-local-access-check: epmd: include host address in local access check OTP-9214
2011-04-08Merge branch 'hw/epmd-bind-to-address' into devHenrik Nord
* hw/epmd-bind-to-address: Allow user to specify the IP address epmd binds to OTP-9213
2011-01-11Remove special treatment of EADDRINUSEPatrik Nyblom
2011-01-11check return value of epmd server listen() callSteve Vinoski
The listen() call can fail due to a variety of conditions, so check its return value and if it fails, print a suitable debug message if appropriate and then exit. The exit values used are the same for those already used for bind() failures: 0 if the error is EADDRINUSE, 1 otherwise.
2010-11-26epmd: include host address in local access checkMichael Santos
In FreeBSD jails, the source and destination address of connections to localhost are changed to be the IP address of the jail. Consider connections from the host's IP address to itself (e.g., the source and destination address match) to be local for the access control checks. Reported-By: [email protected]
2010-11-17Allow user to specify the IP address epmd binds toHolger Weiß
The IP address(es) epmd binds to can now be specified by the user, either via epmd's new "-address" option or (if that's not used) by setting the environment variable ERL_EPMD_ADDRESS. Multiple addresses may be specified using a comma-separated list. If the loopback address is not in this list, it will be added implicitly, so that the daemon can be queried by an interactive epmd process.
2010-10-13Update hint where to find epmd protocol spec in epmd_srv.c.Ralf Doering
With newer releases erts/emulator/internal_doc/erl_ext_dist.txt just forwards the reader to the ERTS User's Guide. Adjust the comment in epmd_srv.c to point to this location too. Signed-off-by: Ralf Doering <[email protected]>
2010-08-31Restore null termination of input bufferPatrik Nyblom
2010-08-31Calculate minimal packet size for ALIVE2 requests correctlyPatrik Nyblom
2010-08-31Fix anomalies in epmd not yet reported as security issuesPatrik Nyblom
Use erts_(v)snprintf to ensure no buffer overruns in debug printouts. Disallow everything except port and name requests from remote nodes. Disallow kill command even from localhost if alive nodes exist. -relaxed_command_check when starting epmd returns the possibility to kill this epmd when nodes are alive (from localhost). Disallow stop command completely except if -relaxed_command_check is given when epmd was started. Environment variable ERL_EPMD_RELAXED_COMMAND_CHECK can be set to always get -relaxed_command_check.
2010-08-31Remove two buffer overflow vulnerabilities in EPMDPatrik Nyblom
2010-08-31Remove very old protocol from EPMDPatrik Nyblom
2010-07-07allow epmd -stop name to unregister a client from epmdSeven Du
2010-05-03Exit if an error occurs with the listening socketMichael Santos
Check errno if either select() or accept() returns an error and exit. This prevents epmd from looping and taking up 100% CPU.
2010-04-30epmd: Remove stray OSE/Delta supportBjörn Gustavsson
2010-01-11Merge branch 'kj/epmd-port2resp-trunc-extra' into ccase/r13b04_devErlang/OTP
* kj/epmd-port2resp-trunc-extra: Handle "extra" field according to specs in ALIVE2_REQ and PORT2_RESP. OTP-8361 EPMD now correctly handles the extra data field which can be given in the ALIVE2_REQ request and retrieved in the PORT2_RESP response. (Thanks to Klas Johansson.)
2009-12-22Handle "extra" field according to specs in ALIVE2_REQ and PORT2_RESP.Klas Johansson
Don't let the length field pollute the value of the "extra" field in ALIVE2_REQ. Extra was read, starting at the second byte of the two byte length field, which meant that it was included in the result and the last byte of the value was skipped: if "extra" is <<1, 2>>, return <<0, 2, 1, 2>> not <<0, 2, 2, 1>> Increment the offset correctly when sending PORT2_RESP, in order to make sure the "extra" field won't be truncated: if "extra" is <<>>, return <<0, 0>> not <<0>> if "extra" is <<1, 2>>, return <<0, 2, 1, 2>> not <<0, 2, 1>> Allow null characters in "extra".
2009-11-20The R13B03 release.OTP_R13B03Erlang/OTP