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2018-10-02Implement {netns,NS} option for inet:getifaddrs/1Raimo Niskanen
Also implement the same option for the legacy undocumented functions inet:getif/1,getiflist/1,ifget/2,ifset/2. The arity 1 functions had before this change got signatures that took a socket port that was used to do the needed syscall, so now the signature was extended to also take an option list with the only supported option {netns,Namespace}. The Socket argument variant remains unsupported. For inet:getifaddrs/1 the documentation file was changed to old style function name definition so be able to hide the Socket argument variant that is visible in the type spec. The arity 2 functions had got an option list as second argument. This list had to be partitioned into one list for the namespace option(s) and the other for the rest. The namespace option list was then fed to the already existing namespace support for socket opening, which places the socket in a namespace and hence made all these functions that in inet_drv.c used getsockopt() work without change. The functions that used getifaddrs() in inet_drv.c had to be changed in inet_drv.c to swap namespaces around the getifaddrs() syscall. This functionality was separated into a new function call_getifaddrs().
2018-09-05Fix documentation due to feedbackRaimo Niskanen
2018-09-04Implement socket option recvtos and friendsRaimo Niskanen
Implement socket options recvtclass, recvtos, recvttl and pktoptions. Document the implemented socket options, new types and message formats. The options recvtclass, recvtos and recvttl are boolean options that when activated (true) for a socket will cause ancillary data to be received through recvmsg(). That is for packet oriented sockets (UDP and SCTP). The required options for this feature were recvtclass and recvtos, and recvttl was only added to test that the ancillary data parsing handled multiple data items in one message correctly. These options does not work on Windows since ancillary data is not handled by the Winsock2 API. For stream sockets (TCP) there is no clear connection between a received packet and what is returned when reading data from the socket, so recvmsg() is not useful. It is possible to get the same ancillary data through a getsockopt() call with the IPv6 socket option IPV6_PKTOPTIONS, on Linux named IPV6_2292PKTOPTIONS after the now obsoleted RFC where it originated. (unfortunately RFC 3542 that obsoletes it explicitly undefines this way to get packet ancillary data from a stream socket) Linux also has got a way to get packet ancillary data for IPv4 TCP sockets through a getsockopt() call with IP_PKTOPTIONS, which appears to be Linux specific. This implementation uses a flag field in the inet_drv.c socket internal data that records if any setsockopt() call with recvtclass, recvtos or recvttl (IPV6_RECVTCLASS, IP_RECVTOS or IP_RECVTTL) has been activated. If so recvmsg() is used instead of recvfrom(). Ancillary data is delivered to the application by a new return tuple format from gen_udp:recv/2,3 containing a list of ancillary data tuples [{tclass,TCLASS} | {tos,TOS} | {ttl,TTL}], as returned by recvmsg(). For a socket in active mode a new message format, containing the ancillary data list, delivers the data in the same way. For gen_sctp the ancillary data is delivered in the same way, except that the gen_sctp return tuple format already contained an ancillary data list so there are just more possible elements when using these socket options. Note that the active mode message format has got an extra tuple level for the ancillary data compared to what is now implemented gen_udp. The gen_sctp active mode format was considered to be the odd one - now all tuples containing ancillary data are flat, except for gen_sctp active mode. Note that testing has not shown that Linux SCTP sockets deliver any ancillary data for these socket options, so it is probably not implemented yet. Remains to be seen what FreeBSD does... For gen_tcp inet:getopts([pktoptions]) will deliver the latest received ancillary data for any activated socket option recvtclass, recvtos or recvttl, on platforms where IP_PKTOPTIONS is defined for an IPv4 socket, or where IPV6_PKTOPTIONS or IPV6_2292PKTOPTIONS is defined for an IPv6 socket. It will be delivered as a list of ancillary data items in the same way as for gen_udp (and gen_sctp). On some platforms, e.g the BSD:s, when you activate IP_RECVTOS you get ancillary data tagged IP_RECVTOS with the TOS value, but on Linux you get ancillary data tagged IP_TOS with the TOS value. Linux follows the style of RFC 2292, and the BSD:s use an older notion. For RFC 2292 that defines the IP_PKTOPTIONS socket option it is more logical to tag the items with the tag that is the item's, than with the tag that defines that you want the item. Therefore this implementation translates all BSD style ancillary data tags to the corresponding Linux style data tags, so the application will only see the tags 'tclass', 'tos' and 'ttl' on all platforms.
2018-03-26Merge branch 'raimo/type-posix-0-overhaul/ERL_550/OTP-14019'Raimo Niskanen
* raimo/type-posix-0-overhaul/ERL_550/OTP-14019: Update types for posix error codes
2018-03-26Update types for posix error codesRaimo Niskanen
I have read the man pages for most socket and file operations on recent Linux, FreeBSD, OpenBSD and Solaris 10 and noted the possible error codes. Which error codes that are possible for file operations have been updated in file:posix/0. Error codes for socket operations in inet:posix/0. The latter refers to the former so it is a superset, assuming that e.g sendfile and AF_UNIX socket operations could cause socket operations to return any file error code. That is not entirely true, but could be, especially in the future. Added to file:posix/0 are: ebadmsg edeadlk edeadlock eftype emultihop enobufs enolck enolink enosr enostr enosys eopnotsupp eoverflow erange etxtbsy Added to inet:posix/0 are all but: exbadport exbadseq file:posix() These are still possible according to erl_posix_str.c, but are not in file:posix/0 nor in inet:posix/0, and many of them are not file nor inet related, but some might be: e2big eadv ealign ebade ebadfd ebadr ebadrpc ebadrqc ebadslt ebfont echild echrng ecomm edirty edom edotdot eduppkg eidrm einit eisnam elbin el2hlt el2nsync el3hlt el3rst elibacc elibbad elibexec elibmax elibscn elnrng enavail enet enoano enocsi enodata enoexec enonet enosym enotempty enotnam enotuniq eproclim eprocunavail eprogmismatch eprogunavail erefused eremchg eremdev eremote eremoteio eremoterelease erpcmismatch erremote eshutdown esrmnt esuccesss etime etoomanyrefs euclean eunatch eusers eversion exfull sysnotready vernotsupported ediscon enomore ecancelled einvalidproctable einvalidprovider eproviderfailedinit syscallfailure service_not_found type_not_found e_no_more e_cancelled unknown
2018-02-13Stop returning V4MAPPED addressesRaimo Niskanen
2018-01-26Implement function for IPv4-mapped IPv6 addressesRaimo Niskanen
2017-12-06Add typespecs to inet:iDimitris Zorbas
2017-07-20Improve spec and doc for inet:get_rc/0Raimo Niskanen
2017-05-04Update copyright yearRaimo Niskanen
2017-04-20implement SO_BINDTODEVICE for inet protocolsAndreas Schultz
bind to device is needed to properly support VRF-Lite under Linux (see [1] for details). [1]: https://www.kernel.org/doc/Documentation/networking/vrf.txt
2016-09-12Implement IPV6_TCLASSRaimo Niskanen
2016-08-11kernel: Export inet types socket_getopt and socket_setoptSverker Eriksson
2016-06-17Merge branch 'raimo/uds-support/OTP-13643'Raimo Niskanen
* raimo/uds-support/OTP-13643: Update test cases after daily builds Return eafnosupport when not supported Add AF_LOCAL test cases Handle 'undefined' in fdopen
2016-06-15Handle 'undefined' in fdopenRaimo Niskanen
2016-06-09Export type inet:stat_option/0Loïc Hoguin
For use in ssl:getstat/{1,2}.
2016-06-09Document the local (unix) address familyRaimo Niskanen
2016-06-08Remove internal state BOUND from inet_drvRaimo Niskanen
2016-06-02Merge branch 'saleyn/uds/PR-612/OTP-13572'Raimo Niskanen
* saleyn/uds/PR-612/OTP-13572: Rewrite inet* for address family 'local' Rewrite inet_drv for AF_LOCAL Assign externally open fd to gen_tcp (UDS support) Conflicts: erts/preloaded/ebin/prim_inet.beam lib/kernel/doc/src/gen_tcp.xml lib/kernel/doc/src/gen_udp.xml lib/kernel/src/inet6_sctp.erl lib/kernel/test/inet_SUITE.erl
2016-06-01Rewrite inet* for address family 'local'Raimo Niskanen
2016-05-20Make inet:gethostbyname respect resolver option `inet6`Daniel Sommermann
This makes the implementation text of inet:gethostbyname/1 identical to that of inet_res:gethostbyname/1. I also copied over the doc note about this resolver option.
2016-02-17kernel: Correct contract for inet:getifaddrs/1Hans Bolinder
See also http://bugs.erlang.org/browse/ERL-95.
2016-01-12Assign externally open fd to gen_tcp (UDS support)Serge Aleynikov
When a AF_LOCAL file descriptor is created externally (e.g. Unix Domain Socket) and passed to `gen_tcp:listen(0, [{fd, FD}])`, the implementation incorrectly assigned the address family to be equal to `inet`, which in the inet_drv driver translated to AF_INET instead of AF_LOCAL (or AF_UNIX), and an `einval` error code was returned. This patch fixes this problem such that the file descriptors of the `local` address family are supported in the inet:fdopen/5, gen_tcp:connect/3, gen_tcp:listen/2, gen_udp:open/2 calls
2015-12-04Merge branch 'maint-17' into maintHenrik Nord
Conflicts: OTP_VERSION erts/doc/src/notes.xml erts/vsn.mk lib/kernel/doc/src/notes.xml lib/kernel/src/kernel.appup.src lib/kernel/vsn.mk lib/ssl/doc/src/notes.xml lib/ssl/src/ssl.appup.src lib/ssl/src/ssl_cipher.erl lib/ssl/vsn.mk otp_versions.table
2015-11-19Fix inet:setopts/2 to take multiple raw optionsRaimo Niskanen
2015-10-26erts: Add {line_delimiter, byte()} option to inet:setopts/2Serge Aleynikov
A new {line_delimiter, byte()} option allows line-oriented TCP-based protocols to use a custom line delimiting character. It is to be used in conjunction with {packet, line}. This option also works with erlang:decode_packet/3 when its first argument is 'line'.
2015-06-18Change license text to APLv2Bruce Yinhe
2015-06-09Add 'show_econnreset' TCP socket optionRory Byrne
An ECONNRESET is a socket error which tells us that a TCP peer has sent an RST. The RST indicates that they have aborted the connection and that the payload we have received should not be considered complete. Up until now, the implementation of TCP in inet_drv.c has hidden the receipt of the RST from the user, treating it as though it was just a FIN terminating the read side of the socket. There are many cases where user code needs to be able to distinguish between a socket that was closed normally and one that was aborted. Setting the option {show_econnreset, true} enables the user to receive ECONNRESET errors on both active and passive sockets. A connected socket returned from gen_tcp:accept/1 will inherit the show_econnreset setting of the listening socket. By default this option is set to {show_econnreset, false}. Note that this patch only enables the reporting of ECONNRESET when the socket is being read from. It does not report ECONNRESET (or EPIPE) when the user tries to write to a connection when an RST has already been received. Currently the TCP implementation in inet_drv.c hides all such send errors from the user in favour of returning {error, close}. A separate patch will be needed to enable the reporting of such errors.
2015-04-09Don't throw exception on prim_inet:setopt/3 errorHolger Weiß
Let gen_tcp:controlling_process/2 and inet_sctp:connect/[45] propagate prim_inet:setopt/3 errors instead of having them generate badmatch exceptions.
2015-02-18Remove infinite loop in inet:gethostbyname_tm/4Raimo Niskanen
An erroneous lookup option is needed to trigger the bug, and that can only enter the system from a parsed file e.g .inetrc. Pinpointed by Emil Holmström
2014-11-20Fix handling netns option in gen_udpEmil Holmström
Bug found by Yaroslav Maslennikov and Andrei Pampukha.
2014-07-24Merge branch 'maint-r16' into maintHenrik Nord
Conflicts: erts/doc/src/notes.xml erts/preloaded/ebin/prim_inet.beam erts/vsn.mk lib/kernel/doc/src/notes.xml lib/kernel/vsn.mk
2014-07-22Fix default behaviour for legacy fdopenHenrik Nord
Update testcase for gen_udp:open/2 with option fd
2014-07-22kernel: When doing an fdopen we now also bind the fd to the specified addr/portLukas Larsson
2014-02-20Correct the contract of inet:ntoa/1Hans Bolinder
Thanks to Max Treskin.
2013-11-26Merge branch 'maint'Raimo Niskanen
Conflicts: erts/preloaded/ebin/prim_inet.beam lib/kernel/test/gen_sctp_SUITE.erl
2013-11-26Merge branch 'maint-r16' into maintRaimo Niskanen
2013-11-07Implement inet:socknames/1,2 and inet:peernames/1,2Raimo Niskanen
2013-10-11Merge branch 'maint'Fredrik Gustafsson
2013-10-10Fix the typespec for the inet:ifget/2 and inet:ifget/3 return valueAli Sabil
2013-09-23add {active,N} socket option for TCP, UDP, and SCTPSteve Vinoski
Add the {active,N} socket option, where N is an integer in the range -32768..32767, to allow a caller to specify the number of data messages to be delivered to the controlling process. Once the socket's delivered message count either reaches 0 or is explicitly set to 0 with inet:setopts/2 or by including {active,0} as an option when the socket is created, the socket transitions to passive ({active, false}) mode and the socket's controlling process receives a message to inform it of the transition. TCP sockets receive {tcp_passive,Socket}, UDP sockets receive {udp_passive,Socket} and SCTP sockets receive {sctp_passive,Socket}. The socket's delivered message counter defaults to 0, but it can be set using {active,N} via any gen_tcp, gen_udp, or gen_sctp function that takes socket options as arguments, or via inet:setopts/2. New N values are added to the socket's current counter value, and negative numbers can be used to reduce the counter value. Specifying a number that would cause the socket's counter value to go above 32767 causes an einval error. If a negative number is specified such that the counter value would become negative, the socket's counter value is set to 0 and the socket transitions to passive mode. If the counter value is already 0 and inet:setopts(Socket, [{active,0}]) is specified, the counter value remains at 0 but the appropriate passive mode transition message is generated for the socket. This commit contains a modified preloaded prim_inet.beam due to changes in prim_inet.erl. Add tests for {active,N} mode for TCP, UDP, and SCTP sockets. Add documentation for {active,N} mode for inet, gen_tcp, gen_udp, and gen_sctp.
2013-09-04Merge branch 'maint'Raimo Niskanen
Conflicts: erts/preloaded/ebin/prim_inet.beam
2013-09-04Merge branch 'raimo/linux-network-namespace-sockopt/OTP-11157' into maintRaimo Niskanen
* raimo/linux-network-namespace-sockopt/OTP-11157: Document socket option 'netns' Rudimentary test Make netns option value a string Implement netns for SCTP + bugfixes Implement netns option for TCP and UDP Implement emulator netns support for TCP and UDP
2013-08-05Merge branch 'maint'Fredrik Gustafsson
2013-07-30kernel: fixed specs to inet:ntoa/1Fredrik Gustafsson
2013-07-30kernel: added ntoa documentation and exported it in inet.erlFredrik Gustafsson
2013-07-17Make netns option value a stringRaimo Niskanen
2013-07-17Implement netns for SCTP + bugfixesRaimo Niskanen
2013-07-17Implement netns option for TCP and UDPRaimo Niskanen
2013-06-10Merge branch 'maint'Raimo Niskanen
Conflicts: lib/kernel/src/inet_db.erl