diff options
Diffstat (limited to 'lib/kernel/doc/src')
| -rw-r--r-- | lib/kernel/doc/src/inet.xml | 194 | ||||
| -rw-r--r-- | lib/kernel/doc/src/net_kernel.xml | 2 | ||||
| -rw-r--r-- | lib/kernel/doc/src/notes.xml | 105 |
3 files changed, 263 insertions, 38 deletions
diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml index ed775d67eb..87b08e4e36 100644 --- a/lib/kernel/doc/src/inet.xml +++ b/lib/kernel/doc/src/inet.xml @@ -198,6 +198,79 @@ fe80::204:acff:fe17:bf38 </desc> </datatype> <datatype> + <name name="getifaddrs_ifopts"/> + <desc> + <p> + Interface address description list returned from + <seealso marker="#getifaddrs/0"><c>getifaddrs/0,1</c></seealso> + for a named interface, translated from the returned + data of the POSIX API function <c>getaddrinfo()</c>. + </p> + <p> + <c><anno>Hwaddr</anno></c> is hardware dependent, + for example, on Ethernet interfaces it is + the 6-byte Ethernet address (MAC address (EUI-48 address)). + </p> + <p> + The tuples <c>{addr,<anno>Addr</anno>}</c>, + <c>{netmask,<anno>Netmask</anno>}</c>, and possibly + <c>{broadaddr,<anno>Broadaddr</anno>}</c> or + <c>{dstaddr,<anno>Dstaddr</anno>}</c> + are repeated in the list + if the interface has got multiple addresses. + An interface may have multiple <c>{flag,_}</c> tuples + for example if it has different flags + for different address families. + Multiple <c>{hwaddr,<anno>Hwaddr</anno>}</c> tuples + is hard to say anything definite about, though. + The tuple <c>{flag,<anno>Flags</anno>}</c> is mandatory, + all others are optional. + </p> + <p> + Do not rely too much on the order + of <c><anno>Flags</anno></c> atoms + or the <c><anno>Ifopt</anno></c> tuples. + There are however some rules: + </p> + <list type="bulleted"> + <item><p> + A <c>{flag,_}</c> tuple applies to all other tuples that follow. + </p></item> + <item><p> + Immediately after <c>{addr,_}</c> follows <c>{netmask,_}</c>. + </p></item> + <item><p> + Immediately thereafter may <c>{broadaddr,_}</c> follow + if <c>broadcast</c> is member of <c><anno>Flags</anno></c>, + or <c>{dstaddr,_}</c> if <c>pointtopoint</c> + is member of <c><anno>Flags</anno></c>. + Both <c>{dstaddr,_}</c> and <c>{broadaddr,_}</c> + does not occur for the same <c>{addr,_}</c>. + </p></item> + <item><p> + Any <c>{netmask,_}</c>, <c>{broadaddr,_}</c>, or + <c>{dstaddr,_}</c> tuples that follow an + <c>{addr,<anno>Addr</anno>}</c> + tuple concerns the address <c><anno>Addr</anno></c>. + </p></item> + </list> + <p> + The tuple <c>{hwaddr,_}</c> is not returned on Solaris, as the + hardware address historically belongs to the link layer + and it is not returned by the Solaris API function + <c>getaddrinfo()</c>. + </p> + <warning> + <p> + On Windows, the data is fetched from different + OS API functions, so the <c><anno>Netmask</anno></c> + and <c><anno>Broadaddr</anno></c> values may be calculated, + just as some <c><anno>Flags</anno></c> values. + </p> + </warning> + </desc> + </datatype> + <datatype> <name name="posix"/> <desc> <p>An atom that is named from the POSIX error codes used in Unix, @@ -324,38 +397,64 @@ fe80::204:acff:fe17:bf38 <name name="getifaddrs" arity="0"/> <fsummary>Return a list of interfaces and their addresses.</fsummary> <desc> - <p>Returns a list of 2-tuples containing interface names and the - interface addresses. <c><anno>Ifname</anno></c> is a Unicode string. - <c><anno>Hwaddr</anno></c> is hardware dependent, for example, on - Ethernet interfaces - it is the 6-byte Ethernet address (MAC address (EUI-48 address)).</p> - <p>The tuples <c>{addr,<anno>Addr</anno>}</c>, <c>{netmask,_}</c>, and - <c>{broadaddr,_}</c> are repeated in the result list if the interface - has multiple addresses. If you come across an interface with - multiple <c>{flag,_}</c> or <c>{hwaddr,_}</c> tuples, you have - a strange interface or possibly a bug in this function. The tuple - <c>{flag,_}</c> is mandatory, all others are optional.</p> - <p>Do not rely too much on the order of <c><anno>Flag</anno></c> atoms - or <c><anno>Ifopt</anno></c> tuples. There are however some rules:</p> - <list type="bulleted"> - <item><p>Immediately after - <c>{addr,_}</c> follows <c>{netmask,_}</c>.</p></item> - <item><p>Immediately thereafter follows <c>{broadaddr,_}</c> if flag - <c>broadcast</c> is <em>not</em> set and flag - <c>pointtopoint</c> <em>is</em> set.</p></item> - <item><p>Any <c>{netmask,_}</c>, <c>{broadaddr,_}</c>, or - <c>{dstaddr,_}</c> tuples that follow an <c>{addr,_}</c> - tuple concerns that address.</p></item> - </list> - <p>The tuple <c>{hwaddr,_}</c> is not returned on Solaris, as the - hardware address historically belongs to the link layer and only - the superuser can read such addresses.</p> - <warning> - <p>On Windows, the data is fetched from different OS API functions, - so the <c><anno>Netmask</anno></c> and <c><anno>Broadaddr</anno></c> - values can be calculated, just as some <c><anno>Flag</anno></c> - values. Report flagrant bugs.</p> - </warning> + <p> + Returns a list of 2-tuples containing interface names and + the interfaces' addresses. <c><anno>Ifname</anno></c> + is a Unicode string and + <c><anno>Ifopts</anno></c> is a list of + interface address description tuples. + </p> + <p> + The interface address description tuples + are documented under the type of the + <seealso marker="#type-getifaddrs_ifopts"> + <c><anno>Ifopts</anno></c> + </seealso> + value. + </p> + </desc> + </func> + + <func> + <name>getifaddrs(Opts) -> + {ok, [{Ifname, Ifopts}]} | {error, Posix} + </name> + <fsummary>Return a list of interfaces and their addresses.</fsummary> + <type> + <v> + Opts = [{netns, Namespace}] + </v> + <v> + Namespace = + <seealso marker="file#type-filename_all"> + file:filename_all() + </seealso> + </v> + <v>Ifname = string()</v> + <v> + Ifopts = + <seealso marker="#type-getifaddrs_ifopts"> + getifaddrs_ifopts() + </seealso> + </v> + <v>Posix = <seealso marker="#type-posix">posix()</seealso></v> + </type> + <desc> + <p> + The same as + <seealso marker="#getifaddrs/0"><c>getifaddrs/0</c></seealso> + but the <c>Option</c> + <c>{netns, Namespace}</c> sets a network namespace + for the OS call, on platforms that supports that feature. + </p> + <p> + See the socket option + <seealso marker="#option-netns"> + <c>{netns, Namespace}</c> + </seealso> + under + <seealso marker="#setopts/2"><c>setopts/2</c></seealso>. + </p> </desc> </func> @@ -950,20 +1049,29 @@ get_tcpi_sacked(Sock) -> </item> <tag><c>{mode, Mode :: binary | list}</c></tag> <item> - <p>Received <c>Packet</c> is delivered as defined by <c>Mode</c>. + <p> + Received <c>Packet</c> is delivered as defined by <c>Mode</c>. </p> </item> - <tag><c>{netns, Namespace :: file:filename_all()}</c></tag> + <tag> + <marker id="option-netns"/> + <c>{netns, Namespace :: file:filename_all()}</c> + </tag> <item> - <p>Sets a network namespace for the socket. Parameter + <p> + Sets a network namespace for the socket. Parameter <c>Namespace</c> is a filename defining the namespace, for example, <c>"/var/run/netns/example"</c>, typically created by command <c>ip netns add example</c>. This option must be used in a function call that creates a socket, that is, <seealso marker="gen_tcp#connect/3"><c>gen_tcp:connect/3,4</c></seealso>, <seealso marker="gen_tcp#listen/2"><c>gen_tcp:listen/2</c></seealso>, - <seealso marker="gen_udp#open/1"><c>gen_udp:open/1,2</c></seealso>, or - <seealso marker="gen_sctp#open/0"><c>gen_sctp:open/0,1,2</c></seealso>.</p> + <seealso marker="gen_udp#open/1"><c>gen_udp:open/1,2</c></seealso> + or + <seealso marker="gen_sctp#open/0"><c>gen_sctp:open/0,1,2</c></seealso>, + and also + <seealso marker="#getifaddrs/1"><c>getifaddrs/1</c></seealso>. + </p> <p>This option uses the Linux-specific syscall <c>setns()</c>, such as in Linux kernel 3.0 or later, and therefore only exists when the runtime system @@ -1039,6 +1147,18 @@ setcap cap_sys_admin,cap_sys_ptrace,cap_dac_read_search+epi beam.smp</code> is turned on for the socket, which means that also small amounts of data are sent immediately.</p> </item> + <tag><c>{nopush, Boolean}</c>(TCP/IP sockets)</tag> + <item> + <p>This translates to <c>TCP_NOPUSH</c> on BSD and + to <c>TCP_CORK</c> on Linux.</p> + <p>If <c>Boolean == true</c>, the corresponding option + is turned on for the socket, which means that small + amounts of data are accumulated until a full MSS-worth + of data is available or this option is turned off.</p> + <p>Note that while <c>TCP_NOPUSH</c> socket option is available on OSX, its semantics + is very different (e.g., unsetting it does not cause immediate send + of accumulated data). Hence, <c>nopush</c> option is intentionally ignored on OSX.</p> + </item> <tag><c>{packet, PacketType}</c>(TCP/IP sockets)</tag> <item> <p><marker id="packet"/>Defines the type of packets to use for a socket. diff --git a/lib/kernel/doc/src/net_kernel.xml b/lib/kernel/doc/src/net_kernel.xml index d3bd7365e2..bfbe7a6470 100644 --- a/lib/kernel/doc/src/net_kernel.xml +++ b/lib/kernel/doc/src/net_kernel.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>1996</year><year>2017</year> + <year>1996</year><year>2018</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> diff --git a/lib/kernel/doc/src/notes.xml b/lib/kernel/doc/src/notes.xml index c766c18233..8188ede6a2 100644 --- a/lib/kernel/doc/src/notes.xml +++ b/lib/kernel/doc/src/notes.xml @@ -31,6 +31,111 @@ </header> <p>This document describes the changes made to the Kernel application.</p> +<section><title>Kernel 6.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + The values <c>all</c> and <c>none</c> are documented as + valid value for the Kernel configuration parameter + <c>logger_level</c>, but would cause a crash during node + start. This is now corrected.</p> + <p> + Own Id: OTP-15143</p> + </item> + <item> + <p> + Fix some potential buggy behavior in how ticks are sent + on inter node distribution connections. Tick is now sent + to c-node even if there are unsent buffered data, as + c-nodes need ticks in order to send reply ticks. The + amount of sent data was also calculated wrongly when + ticks were suppressed due to unsent buffered data.</p> + <p> + Own Id: OTP-15162 Aux Id: ERIERL-191 </p> + </item> + <item> + <p> + Non semantic change in dist_util.erl to silence dialyzer + warning.</p> + <p> + Own Id: OTP-15170</p> + </item> + <item> + <p> + Fixed <c>net_kernel:connect_node(node())</c> to return + <c>true</c> (and do nothing) as it always has before + OTP-21.0. Also documented this successful "self connect" + as the expected behavior.</p> + <p> + Own Id: OTP-15182 Aux Id: ERL-643 </p> + </item> + <item> + <p> + The single_line option on logger_formatter would in some + cases add an unwanted comma after the association arrows + in a map. This is now corrected.</p> + <p> + Own Id: OTP-15228</p> + </item> + <item> + <p> + Improved robustness of distribution connection setup. In + OTP-21.0 a truly asynchronous connection setup was + introduced. This is further improvement on that work to + make the emulator more robust and also be able to recover + in cases when involved Erlang processes misbehave.</p> + <p> + Own Id: OTP-15297 Aux Id: OTP-15279, OTP-15280 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + A new macro, <c>?LOG(Level,...)</c>, is added. This is + equivalent to the existing <c>?LOG_<LEVEL>(...)</c> + macros.</p> + <p> + A new variant of Logger report callback is added, which + takes an extra argument containing options for size + limiting and line breaks. Module <c>proc_lib</c> in + <c>STDLIB</c> uses this for crash reports.</p> + <p> + Logger configuration is now checked a bit more for + errors.</p> + <p> + Own Id: OTP-15132</p> + </item> + <item> + <p> + The socket options <c>recvtos</c>, <c>recvttl</c>, + <c>recvtclass</c> and <c>pktoptions</c> have been + implemented in the socket modules. See the documentation + for the <c>gen_tcp</c>, <c>gen_udp</c> and <c>inet</c> + modules. Note that support for these in the runtime + system is platform dependent. Especially for + <c>pktoptions</c> which is very Linux specific and + obsoleted by the RFCs that defined it.</p> + <p> + Own Id: OTP-15145 Aux Id: ERIERL-187 </p> + </item> + <item> + <p> + Add <c>logger:set_application_level/2</c> for setting the + logger level of all modules in one application.</p> + <p> + Own Id: OTP-15146</p> + </item> + </list> + </section> + +</section> + <section><title>Kernel 6.0.1</title> <section><title>Fixed Bugs and Malfunctions</title> |