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Diffstat (limited to 'erts/preloaded/src/socket.erl')
| -rw-r--r-- | erts/preloaded/src/socket.erl | 3680 |
1 files changed, 3680 insertions, 0 deletions
diff --git a/erts/preloaded/src/socket.erl b/erts/preloaded/src/socket.erl new file mode 100644 index 0000000000..5c1647290d --- /dev/null +++ b/erts/preloaded/src/socket.erl @@ -0,0 +1,3680 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2018-2019. All Rights Reserved. +%% +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. +%% +%% %CopyrightEnd% +%% + +-module(socket). + +-compile(no_native). +-compile({no_auto_import,[error/1]}). + +%% Administrative and "global" utility functions +-export([ + on_load/0, on_load/1, + info/0, + supports/0, supports/1, supports/2, supports/3, + ensure_sockaddr/1 + ]). + +-export([ + open/2, open/3, open/4, + bind/2, bind/3, + connect/2, connect/3, + listen/1, listen/2, + accept/1, accept/2, + + send/2, send/3, send/4, + sendto/3, sendto/4, sendto/5, + sendmsg/2, sendmsg/3, sendmsg/4, + + recv/1, recv/2, recv/3, recv/4, + recvfrom/1, recvfrom/2, recvfrom/3, recvfrom/4, + recvmsg/1, recvmsg/2, recvmsg/3, recvmsg/5, + + close/1, + shutdown/2, + + setopt/4, + getopt/3, + + sockname/1, + peername/1 + ]). + +-export_type([ + domain/0, + type/0, + protocol/0, + socket/0, + + port_number/0, + ip_address/0, + ip4_address/0, + ip6_address/0, + sockaddr/0, + sockaddr_in4/0, + sockaddr_in6/0, + sockaddr_un/0, + + accept_flags/0, + accept_flag/0, + + send_flags/0, + send_flag/0, + + recv_flags/0, + recv_flag/0, + + shutdown_how/0, + + sockopt_level/0, + otp_socket_option/0, + socket_option/0, + ip_socket_option/0, + ipv6_socket_option/0, + tcp_socket_option/0, + udp_socket_option/0, + sctp_socket_option/0, + raw_socket_option/0, + + timeval/0, + ip_tos/0, + ip_mreq/0, + ip_mreq_source/0, + ip_pmtudisc/0, + ip_msfilter_mode/0, + ip_msfilter/0, + ip_pktinfo/0, + ipv6_mreq/0, + ipv6_pmtudisc/0, + ipv6_pktinfo/0, + in6_flow_info/0, + in6_scope_id/0, + sctp_assoc_id/0, + sctp_sndrcvinfo/0, + sctp_event_subscribe/0, + sctp_assocparams/0, + sctp_initmsg/0, + sctp_rtoinfo/0, + + + msghdr_flag/0, + msghdr_flags/0, + msghdr/0, + cmsghdr_level/0, + cmsghdr_type/0, + %% cmsghdr_data/0, + cmsghdr_recv/0, cmsghdr_send/0, + + uint8/0, + uint16/0, + uint20/0, + uint32/0, + int32/0 + ]). + + +-type uint8() :: 0..16#FF. +-type uint16() :: 0..16#FFFF. +-type uint20() :: 0..16#FFFFF. +-type uint32() :: 0..16#FFFFFFFF. +-type int32() :: -2147483648..2147483647. + + +%% We support only a subset of all domains. +-type domain() :: local | inet | inet6. + +%% We support only a subset of all types. +%% RDM - Reliably Delivered Messages +-type type() :: stream | dgram | raw | rdm | seqpacket. + +%% We support only a subset of all protocols: +%% Note that the '{raw, integer()}' construct is intended +%% to be used with type = raw. +%% Note also that only the "superuser" can create a raw socket. +-type protocol() :: ip | tcp | udp | sctp | icmp | igmp | {raw, integer()}. + +-type port_number() :: 0..65535. + +-type ip_address() :: ip4_address() | ip6_address(). + +-type ip4_address() :: {0..255, 0..255, 0..255, 0..255}. + +-type in6_flow_info() :: uint20(). +-type in6_scope_id() :: uint32(). + +-type ip6_address() :: + {0..65535, + 0..65535, + 0..65535, + 0..65535, + 0..65535, + 0..65535, + 0..65535, + 0..65535}. + +-type timeval() :: #{sec := integer(), + usec := integer()}. + +-type ip_pktinfo() :: #{ + ifindex := non_neg_integer(), % Interface Index + spec_dst := ip4_address(), % Local Address + addr := ip4_address() % Header Destination address + }. + +%% If the integer value is used, its up to the caller to ensure its valid! +-type ip_tos() :: lowdeley | + throughput | + reliability | + mincost | + integer(). + +%% This type is used when requesting to become member of a multicast +%% group with a call to setopt. Example: +%% +%% socket:setopt(Socket, ip, add_membership, #{multiaddr => Addr, +%% interface => any}). +%% +%% Its also used when removing from a multicast group. Example: +%% +%% socket:setopt(Socket, ip, drop_membership, #{multiaddr => Addr, +%% interface => any}). +%% + +-type ip_mreq() :: #{multiaddr := ip4_address(), + interface := any | ip4_address()}. +%% -type ip_mreqn() :: #{multiaddr := ip4_address(), +%% address := any | ip4_address(), +%% ifindex := integer()}. + +-type ip_mreq_source() :: #{multiaddr := ip4_address(), + interface := ip4_address(), + sourceaddr := ip4_address()}. + +-type ip_pmtudisc() :: want | dont | do | probe. + +%% multiaddr: Multicast group address +%% interface: Address of local interface +%% mode: Filter mode +%% slist: List of source addresses +-type ip_msfilter_mode() :: include | exclude. + +-type ip_msfilter() :: #{multiaddr := ip4_address(), + interface := ip4_address(), + mode := ip_msfilter_mode(), + slist := [ip4_address()]}. + +-type ipv6_mreq() :: #{multiaddr := ip6_address(), + interface := non_neg_integer()}. + +-type ipv6_pmtudisc() :: ip_pmtudisc(). + +-type ipv6_pktinfo() :: #{ + addr := ip6_address(), + ifindex := integer() + }. + + +-type sctp_assoc_id() :: int32(). +-type sctp_sndrcvinfo() :: #{ + stream := uint16(), + ssn := uint16(), + flags := uint16(), + ppid := uint16(), + context := uint16(), + timetolive := uint16(), + tsn := uint16(), + cumtsn := uint16(), + assoc_id := sctp_assoc_id() + }. + +-type sctp_event_subscribe() :: #{data_in := boolean(), + association := boolean(), + address := boolean(), + send_failure := boolean(), + peer_error := boolean(), + shutdown := boolean(), + partial_delivery := boolean(), + adaptation_layer := boolean(), + authentication := boolean(), + sender_dry := boolean()}. + +-type sctp_assocparams() :: #{assoc_id := sctp_assoc_id(), + max_rxt := uint16(), + num_peer_dests := uint16(), + peer_rwnd := uint32(), + local_rwnd := uint32(), + cookie_life := uint32()}. + +-type sctp_initmsg() :: #{num_outstreams := uint16(), + max_instreams := uint16(), + max_attempts := uint16(), + max_init_timeo := uint16() + }. + +-type sctp_rtoinfo() :: #{assoc_id := sctp_assoc_id(), + initial := uint32(), + max := uint32(), + min := uint32()}. + +-type sockaddr_un() :: #{family := local, + path := binary() | string()}. +-type sockaddr_in4() :: #{family := inet, + port := port_number(), + addr := any | loopback | ip4_address()}. +-type sockaddr_in6() :: #{family := inet6, + port := port_number(), + addr := any | loopback | ip6_address(), + flowinfo := in6_flow_info(), + scope_id := in6_scope_id()}. +-type sockaddr() :: sockaddr_in4() | + sockaddr_in6() | + sockaddr_un(). + +-define(SOCKADDR_IN4_DEFAULTS(A), #{port => 0, + addr => A}). +-define(SOCKADDR_IN4_DEFAULTS, ?SOCKADDR_IN4_DEFAULTS(any)). +-define(SOCKADDR_IN4_DEFAULT(A), (?SOCKADDR_IN4_DEFAULTS(A))#{family => inet}). +-define(SOCKADDR_IN6_DEFAULTS(A), #{port => 0, + addr => A, + flowinfo => 0, + scope_id => 0}). +-define(SOCKADDR_IN6_DEFAULTS, ?SOCKADDR_IN6_DEFAULTS(any)). +-define(SOCKADDR_IN6_DEFAULT(A), (?SOCKADDR_IN6_DEFAULTS(A))#{family => inet6}). + +%% otp - The option is internal to our (OTP) imeplementation. +%% socket - The socket layer (SOL_SOCKET). +%% ip - The IP layer (SOL_IP or is it IPPROTO_IP?). +%% ipv6 - The IPv6 layer (SOL_IPV6). +%% tcp - The TCP (Transport Control Protocol) layer (IPPROTO_TCP). +%% udp - The UDP (User Datagram Protocol) layer (IPPROTO_UDP). +%% sctp - The SCTP (Stream Control Transmission Protocol) layer (IPPROTO_SCTP). +%% Int - Raw level, sent down and used "as is". +-type sockopt_level() :: otp | + socket | + ip | ipv6 | tcp | udp | sctp | + non_neg_integer(). + +%% There are some options that are 'read-only'. +%% Should those be included here or in a special list? +%% Should we just document it and leave it to the user? +%% Or catch it in the encode functions? +%% A setopt for a readonly option leads to einval? +%% Do we really need a sndbuf? + +-type otp_socket_option() :: debug | + iow | + controlling_process | + rcvbuf | % sndbuf | + rcvctrlbuf | + sndctrlbuf | + fd. +%% Shall we have special treatment of linger?? +%% read-only options: +%% domain | protocol | type. +%% FreeBSD (only?): acceptfilter +-type socket_option() :: acceptconn | + acceptfilter | + bindtodevice | + broadcast | + busy_poll | + debug | + domain | + dontroute | + error | + keepalive | + linger | + mark | + oobinline | + passcred | + peek_off | + peekcred | + priority | + protocol | + rcvbuf | + rcvbufforce | + rcvlowat | + rcvtimeo | + reuseaddr | + reuseport | + rxq_ovfl | + setfib | + sndbuf | + sndbufforce | + sndlowat | + sndtimeo | + timestamp | + type. + +%% Read-only options: +%% mtu +%% +%% Options only valid on FreeBSD?: +%% dontfrag +%% Options only valid for RAW sockets: +%% nodefrag (linux only?) +-type ip_socket_option() :: add_membership | + add_source_membership | + block_source | + dontfrag | + drop_membership | + drop_source_membership | + freebind | + hdrincl | + minttl | + msfilter | + mtu | + mtu_discover | + multicast_all | + multicast_if | + multicast_loop | + multicast_ttl | + nodefrag | + options | + pktinfo | + recverr | + recvif | + recvdstaddr | + recvopts | + recvorigdstaddr | + recvtos | + recvttl | + retopts | + router_alert | + sndsrcaddr | + tos | + transparent | + ttl | + unblock_source. +-type ipv6_socket_option() :: + addrform | + add_membership | + authhdr | + auth_level | + checksum | + drop_membership | + dstopts | + esp_trans_level | + esp_network_level | + faith | + flowinfo | + hoplimit | + hopopts | + ipcomp_level | + join_group | + leave_group | + mtu | + mtu_discover | + multicast_hops | + multicast_if | + multicast_loop | + portrange | + pktoptions | + recverr | + recvpktinfo | pktinfo | + recvtclass | + router_alert | + rthdr | + tclass | + unicast_hops | + use_min_mtu | + v6only. + +-type tcp_socket_option() :: congestion | + cork | + info | + keepcnt | + keepidle | + keepintvl | + maxseg | + md5sig | + nodelay | + noopt | + nopush | + syncnt | + user_timeout. + +-type udp_socket_option() :: cork. + +-type sctp_socket_option() :: + adaption_layer | + associnfo | + auth_active_key | + auth_asconf | + auth_chunk | + auth_key | + auth_delete_key | + autoclose | + context | + default_send_params | + delayed_ack_time | + disable_fragments | + hmac_ident | + events | + explicit_eor | + fragment_interleave | + get_peer_addr_info | + initmsg | + i_want_mapped_v4_addr | + local_auth_chunks | + maxseg | + maxburst | + nodelay | + partial_delivery_point | + peer_addr_params | + peer_auth_chunks | + primary_addr | + reset_streams | + rtoinfo | + set_peer_primary_addr | + status | + use_ext_recvinfo. + +-type raw_socket_option() :: filter. + +%% -type plain_socket_option() :: integer(). +%% -type sockopt() :: otp_socket_option() | +%% socket_option() | +%% ip_socket_option() | +%% ipv6_socket_option() | +%% tcp_socket_option() | +%% udp_socket_option() | +%% sctp_socket_option() | +%% raw_socket_option() | +%% plain_socket_option(). + +-record(socket, {ref :: reference()}). + +-opaque socket() :: #socket{}. + +-type accept_flags() :: [accept_flag()]. +-type accept_flag() :: nonblock | cloexec. + +-type send_flags() :: [send_flag()]. +-type send_flag() :: confirm | + dontroute | + eor | + more | + nosignal | + oob. + +%% Extend with OWN flags for other usage: +%% - adapt-buffer-sz: +%% This will have the effect that the nif recvfrom will use +%% MSG_PEEK to ensure no part of the message is lost, but if +%% necessary adapt (increase) the buffer size until all of +%% it fits. +%% +%% Note that not all of these flags is useful for every recv function! +%% +-type recv_flags() :: [recv_flag()]. +-type recv_flag() :: cmsg_cloexec | + errqueue | + oob | + peek | + trunc. + +-type shutdown_how() :: read | write | read_write. + +%% These are just place-holder(s) - used by the sendmsg/recvmsg functions... +-type msghdr_flag() :: ctrunc | eor | errqueue | oob | trunc. +-type msghdr_flags() :: [msghdr_flag()]. +-type msghdr() :: #{ + %% *Optional* target address + %% Used on an unconnected socket to specify the + %% target address for a datagram. + addr := sockaddr(), + + iov := [binary()], + + %% The maximum size of the control buffer is platform + %% specific. It is the users responsibility to ensure + %% that its not exceeded. + ctrl := [cmsghdr_recv()] | [cmsghdr_send()], + + %% Only valid with recvmsg + flags := msghdr_flags() + }. +%% We are able to (completely) decode *some* control message headers. +%% Even if we are able to decode both level and type, we may not be +%% able to decode the data, in which case it will be a binary. + +-type cmsghdr_level() :: socket | ip | ipv6 | integer(). +-type cmsghdr_type() :: timestamp | + pktinfo | + tos | + ttl | + rights | + credentials | + origdstaddr | + integer(). +-type cmsghdr_recv() :: + #{level := socket, type := timestamp, data := timeval()} | + #{level := socket, type := rights, data := binary()} | + #{level := socket, type := credentials, data := binary()} | + #{level := socket, type := integer(), data := binary()} | + #{level := ip, type := tos, data := ip_tos()} | + #{level := ip, type := ttl, data := integer()} | + #{level := ip, type := pktinfo, data := ip_pktinfo()} | + #{level := ip, type := origdstaddr, data := sockaddr_in4()} | + #{level := ip, type := integer(), data := binary()} | + #{level := ipv6, type := pktinfo, data := ipv6_pktinfo()} | + #{level := ipv6, type := integer(), data := binary()} | + #{level := integer(), type := integer(), data := binary()}. +-type cmsghdr_send() :: + #{level := socket, type := integer(), data := binary()} | + #{level := ip, type := tos, data := ip_tos() | binary()} | + #{level := ip, type := ttl, data := integer() | binary()} | + #{level := ip, type := integer(), data := binary()} | + #{level := ipv6, type := integer(), data := binary()} | + #{level := udp, type := integer(), data := binary()} | + #{level := integer(), type := integer(), data := binary()}. + + +-define(SOCKET_DOMAIN_LOCAL, 1). +-define(SOCKET_DOMAIN_UNIX, ?SOCKET_DOMAIN_LOCAL). +-define(SOCKET_DOMAIN_INET, 2). +-define(SOCKET_DOMAIN_INET6, 3). + +-define(SOCKET_TYPE_STREAM, 1). +-define(SOCKET_TYPE_DGRAM, 2). +-define(SOCKET_TYPE_RAW, 3). +%% -define(SOCKET_TYPE_RDM, 4). +-define(SOCKET_TYPE_SEQPACKET, 5). + +-define(SOCKET_PROTOCOL_IP, 1). +-define(SOCKET_PROTOCOL_TCP, 2). +-define(SOCKET_PROTOCOL_UDP, 3). +-define(SOCKET_PROTOCOL_SCTP, 4). +-define(SOCKET_PROTOCOL_ICMP, 5). +-define(SOCKET_PROTOCOL_IGMP, 6). + +-define(SOCKET_LISTEN_BACKLOG_DEFAULT, 5). + +-define(SOCKET_ACCEPT_TIMEOUT_DEFAULT, infinity). + +-define(SOCKET_SEND_FLAG_CONFIRM, 0). +-define(SOCKET_SEND_FLAG_DONTROUTE, 1). +-define(SOCKET_SEND_FLAG_EOR, 2). +-define(SOCKET_SEND_FLAG_MORE, 3). +-define(SOCKET_SEND_FLAG_NOSIGNAL, 4). +-define(SOCKET_SEND_FLAG_OOB, 5). + +-define(SOCKET_SEND_FLAGS_DEFAULT, []). +-define(SOCKET_SEND_TIMEOUT_DEFAULT, infinity). +-define(SOCKET_SENDTO_FLAGS_DEFAULT, []). +-define(SOCKET_SENDTO_TIMEOUT_DEFAULT, ?SOCKET_SEND_TIMEOUT_DEFAULT). +-define(SOCKET_SENDMSG_FLAGS_DEFAULT, []). +-define(SOCKET_SENDMSG_TIMEOUT_DEFAULT, ?SOCKET_SEND_TIMEOUT_DEFAULT). + +-define(SOCKET_RECV_FLAG_CMSG_CLOEXEC, 0). +-define(SOCKET_RECV_FLAG_ERRQUEUE, 1). +-define(SOCKET_RECV_FLAG_OOB, 2). +-define(SOCKET_RECV_FLAG_PEEK, 3). +-define(SOCKET_RECV_FLAG_TRUNC, 4). + +-define(SOCKET_RECV_FLAGS_DEFAULT, []). +-define(SOCKET_RECV_TIMEOUT_DEFAULT, infinity). + +-define(SOCKET_OPT_LEVEL_OTP, 0). +-define(SOCKET_OPT_LEVEL_SOCKET, 1). +-define(SOCKET_OPT_LEVEL_IP, 2). +-define(SOCKET_OPT_LEVEL_IPV6, 3). +-define(SOCKET_OPT_LEVEL_TCP, 4). +-define(SOCKET_OPT_LEVEL_UDP, 5). +-define(SOCKET_OPT_LEVEL_SCTP, 6). + +%% *** OTP (socket) options +-define(SOCKET_OPT_OTP_DEBUG, 1). +-define(SOCKET_OPT_OTP_IOW, 2). +-define(SOCKET_OPT_OTP_CTRL_PROC, 3). +-define(SOCKET_OPT_OTP_RCVBUF, 4). +%%-define(SOCKET_OPT_OTP_SNDBUF, 5). +-define(SOCKET_OPT_OTP_RCVCTRLBUF, 6). +-define(SOCKET_OPT_OTP_SNDCTRLBUF, 7). +-define(SOCKET_OPT_OTP_FD, 8). +-define(SOCKET_OPT_OTP_DOMAIN, 16#FF01). % INTERNAL +-define(SOCKET_OPT_OTP_TYPE, 16#FF02). % INTERNAL +-define(SOCKET_OPT_OTP_PROTOCOL, 16#FF03). % INTERNAL + +%% *** SOCKET (socket) options +-define(SOCKET_OPT_SOCK_ACCEPTCONN, 1). +%% -define(SOCKET_OPT_SOCK_ACCEPTFILTER, 2). % FreeBSD +-define(SOCKET_OPT_SOCK_BINDTODEVICE, 3). +-define(SOCKET_OPT_SOCK_BROADCAST, 4). +%% -define(SOCKET_OPT_SOCK_BUSY_POLL, 5). +-define(SOCKET_OPT_SOCK_DEBUG, 6). +-define(SOCKET_OPT_SOCK_DOMAIN, 7). +-define(SOCKET_OPT_SOCK_DONTROUTE, 8). +%% -define(SOCKET_OPT_SOCK_ERROR, 9). +-define(SOCKET_OPT_SOCK_KEEPALIVE, 10). +-define(SOCKET_OPT_SOCK_LINGER, 11). +%% -define(SOCKET_OPT_SOCK_MARK, 12). +-define(SOCKET_OPT_SOCK_OOBINLINE, 13). +%% -define(SOCKET_OPT_SOCK_PASSCRED, 14). +-define(SOCKET_OPT_SOCK_PEEK_OFF, 15). +%% -define(SOCKET_OPT_SOCK_PEEKCRED, 16). +-define(SOCKET_OPT_SOCK_PRIORITY, 17). +-define(SOCKET_OPT_SOCK_PROTOCOL, 18). +-define(SOCKET_OPT_SOCK_RCVBUF, 19). +%% -define(SOCKET_OPT_SOCK_RCVBUFFORCE, 20). +-define(SOCKET_OPT_SOCK_RCVLOWAT, 21). +-define(SOCKET_OPT_SOCK_RCVTIMEO, 22). +-define(SOCKET_OPT_SOCK_REUSEADDR, 23). +-define(SOCKET_OPT_SOCK_REUSEPORT, 24). +%% -define(SOCKET_OPT_SOCK_RXQ_OVFL, 25). +%% -define(SOCKET_OPT_SOCK_SETFIB, 26). % FreeBSD +-define(SOCKET_OPT_SOCK_SNDBUF, 27). +%% -define(SOCKET_OPT_SOCK_SNDBUFFORCE, 28). +-define(SOCKET_OPT_SOCK_SNDLOWAT, 29). +-define(SOCKET_OPT_SOCK_SNDTIMEO, 30). +-define(SOCKET_OPT_SOCK_TIMESTAMP, 31). +-define(SOCKET_OPT_SOCK_TYPE, 32). + +%% *** IP (socket) options +-define(SOCKET_OPT_IP_ADD_MEMBERSHIP, 1). +-define(SOCKET_OPT_IP_ADD_SOURCE_MEMBERSHIP, 2). +-define(SOCKET_OPT_IP_BLOCK_SOURCE, 3). +%% -define(SOCKET_OPT_IP_DONTFRAG, 4). % FreeBSD +-define(SOCKET_OPT_IP_DROP_MEMBERSHIP, 5). +-define(SOCKET_OPT_IP_DROP_SOURCE_MEMBERSHIP, 6). +-define(SOCKET_OPT_IP_FREEBIND, 7). +-define(SOCKET_OPT_IP_HDRINCL, 8). +-define(SOCKET_OPT_IP_MINTTL, 9). +-define(SOCKET_OPT_IP_MSFILTER, 10). +-define(SOCKET_OPT_IP_MTU, 11). +-define(SOCKET_OPT_IP_MTU_DISCOVER, 12). +-define(SOCKET_OPT_IP_MULTICAST_ALL, 13). +-define(SOCKET_OPT_IP_MULTICAST_IF, 14). +-define(SOCKET_OPT_IP_MULTICAST_LOOP, 15). +-define(SOCKET_OPT_IP_MULTICAST_TTL, 16). +-define(SOCKET_OPT_IP_NODEFRAG, 17). +%% -define(SOCKET_OPT_IP_OPTIONS, 18). % FreeBSD +-define(SOCKET_OPT_IP_PKTINFO, 19). +-define(SOCKET_OPT_IP_RECVDSTADDR, 20). % FreeBSD +-define(SOCKET_OPT_IP_RECVERR, 21). +-define(SOCKET_OPT_IP_RECVIF, 22). +-define(SOCKET_OPT_IP_RECVOPTS, 23). +-define(SOCKET_OPT_IP_RECVORIGDSTADDR, 24). +-define(SOCKET_OPT_IP_RECVTOS, 25). +-define(SOCKET_OPT_IP_RECVTTL, 26). +-define(SOCKET_OPT_IP_RETOPTS, 27). +-define(SOCKET_OPT_IP_ROUTER_ALERT, 28). +-define(SOCKET_OPT_IP_SENDSRCADDR, 29). % FreeBSD +-define(SOCKET_OPT_IP_TOS, 30). +-define(SOCKET_OPT_IP_TRANSPARENT, 31). +-define(SOCKET_OPT_IP_TTL, 32). +-define(SOCKET_OPT_IP_UNBLOCK_SOURCE, 33). + +%% *** IPv6 (socket) options +-define(SOCKET_OPT_IPV6_ADDRFORM, 1). +-define(SOCKET_OPT_IPV6_ADD_MEMBERSHIP, 2). +-define(SOCKET_OPT_IPV6_AUTHHDR, 3). % Obsolete? +%% -define(SOCKET_OPT_IPV6_AUTH_LEVEL, 4). % FreeBSD +%% -define(SOCKET_OPT_IPV6_CHECKSUM, 5). % FreeBSD +-define(SOCKET_OPT_IPV6_DROP_MEMBERSHIP, 6). +-define(SOCKET_OPT_IPV6_DSTOPTS, 7). +%% -define(SOCKET_OPT_IPV6_ESP_NETWORK_LEVEL, 8). % FreeBSD +%% -define(SOCKET_OPT_IPV6_ESP_TRANS_LEVEL, 9). % FreeBSD +%% -define(SOCKET_OPT_IPV6_FAITH, 10). % FreeBSD +-define(SOCKET_OPT_IPV6_FLOWINFO, 11). +-define(SOCKET_OPT_IPV6_HOPLIMIT, 12). +-define(SOCKET_OPT_IPV6_HOPOPTS, 13). +%% -define(SOCKET_OPT_IPV6_IPCOMP_LEVEL, 14). % FreeBSD +%% -define(SOCKET_OPT_IPV6_JOIN_GROUP, 15). % FreeBSD +%% -define(SOCKET_OPT_IPV6_LEAVE_GROUP, 16). % FreeBSD +-define(SOCKET_OPT_IPV6_MTU, 17). +-define(SOCKET_OPT_IPV6_MTU_DISCOVER, 18). +-define(SOCKET_OPT_IPV6_MULTICAST_HOPS, 19). +-define(SOCKET_OPT_IPV6_MULTICAST_IF, 20). +-define(SOCKET_OPT_IPV6_MULTICAST_LOOP, 21). +%% -define(SOCKET_OPT_IPV6_PORTRANGE, 22). % FreeBSD +%% -define(SOCKET_OPT_IPV6_PKTOPTIONS, 23). % FreeBSD +-define(SOCKET_OPT_IPV6_RECVERR, 24). +-define(SOCKET_OPT_IPV6_RECVPKTINFO, 25). % On FreeBSD: PKTINFO +%% -define(SOCKET_OPT_IPV6_RECVTCLASS, 26). +-define(SOCKET_OPT_IPV6_ROUTER_ALERT, 27). +-define(SOCKET_OPT_IPV6_RTHDR, 28). +%% -define(SOCKET_OPT_IPV6_TCLASS, 29). % FreeBSD +-define(SOCKET_OPT_IPV6_UNICAST_HOPS, 30). +%% -define(SOCKET_OPT_IPV6_USE_MIN_MTU, 31). % FreeBSD +-define(SOCKET_OPT_IPV6_V6ONLY, 32). + +%% *** TCP (socket) options +-define(SOCKET_OPT_TCP_CONGESTION, 1). +-define(SOCKET_OPT_TCP_CORK, 2). +%% -define(SOCKET_OPT_TCP_INFO, 3). +%% -define(SOCKET_OPT_TCP_KEEPCNT, 4). +%% -define(SOCKET_OPT_TCP_KEEPIDLE, 5). +%% -define(SOCKET_OPT_TCP_KEEPINTVL, 6). +-define(SOCKET_OPT_TCP_MAXSEG, 7). +%% -define(SOCKET_OPT_TCP_MD5SIG, 8). +-define(SOCKET_OPT_TCP_NODELAY, 9). +%% -define(SOCKET_OPT_TCP_NOOPT, 10). +%% -define(SOCKET_OPT_TCP_NOPUSH, 11). +%% -define(SOCKET_OPT_TCP_SYNCNT, 12). +%% -define(SOCKET_OPT_TCP_USER_TIMEOUT, 13). + +%% *** UDP (socket) options +-define(SOCKET_OPT_UDP_CORK, 1). + +%% *** SCTP (socket) options +%% -define(SOCKET_OPT_SCTP_ADAPTION_LAYER, 1). +-define(SOCKET_OPT_SCTP_ASSOCINFO, 2). +%% -define(SOCKET_OPT_SCTP_AUTH_ACTIVE_KEY, 3). +%% -define(SOCKET_OPT_SCTP_AUTH_ASCONF, 4). +%% -define(SOCKET_OPT_SCTP_AUTH_CHUNK, 5). +%% -define(SOCKET_OPT_SCTP_AUTH_KEY, 6). +%% -define(SOCKET_OPT_SCTP_AUTH_DELETE_KEY, 7). +-define(SOCKET_OPT_SCTP_AUTOCLOSE, 8). +%% -define(SOCKET_OPT_SCTP_CONTEXT, 9). +%% -define(SOCKET_OPT_SCTP_DEFAULT_SEND_PARAMS, 10). +%% -define(SOCKET_OPT_SCTP_DELAYED_ACK_TIME, 11). +-define(SOCKET_OPT_SCTP_DISABLE_FRAGMENTS, 12). +%% -define(SOCKET_OPT_SCTP_HMAC_IDENT, 13). +-define(SOCKET_OPT_SCTP_EVENTS, 14). +%% -define(SOCKET_OPT_SCTP_EXPLICIT_EOR, 15). +%% -define(SOCKET_OPT_SCTP_FRAGMENT_INTERLEAVE, 16). +%% -define(SOCKET_OPT_SCTP_GET_PEER_ADDR_INFO, 17). +-define(SOCKET_OPT_SCTP_INITMSG, 18). +%% -define(SOCKET_OPT_SCTP_I_WANT_MAPPED_V4_ADDR, 19). +%% -define(SOCKET_OPT_SCTP_LOCAL_AUTH_CHUNKS, 20). +-define(SOCKET_OPT_SCTP_MAXSEG, 21). +%% -define(SOCKET_OPT_SCTP_MAXBURST, 22). +-define(SOCKET_OPT_SCTP_NODELAY, 23). +%% -define(SOCKET_OPT_SCTP_PARTIAL_DELIVERY_POINT, 24). +%% -define(SOCKET_OPT_SCTP_PEER_ADDR_PARAMS, 25). +%% -define(SOCKET_OPT_SCTP_PEER_AUTH_CHUNKS, 26). +%% -define(SOCKET_OPT_SCTP_PRIMARY_ADDR, 27). +%% -define(SOCKET_OPT_SCTP_RESET_STREAMS, 28). +-define(SOCKET_OPT_SCTP_RTOINFO, 29). +%% -define(SOCKET_OPT_SCTP_SET_PEER_PRIMARY_ADDR, 30). +%% -define(SOCKET_OPT_SCTP_STATUS, 31). +%% -define(SOCKET_OPT_SCTP_USE_EXT_RECVINFO, 32). + +-define(SOCKET_SHUTDOWN_HOW_READ, 0). +-define(SOCKET_SHUTDOWN_HOW_WRITE, 1). +-define(SOCKET_SHUTDOWN_HOW_READ_WRITE, 2). + + +-define(SOCKET_SUPPORTS_OPTIONS, 16#0001). +-define(SOCKET_SUPPORTS_SCTP, 16#0002). +-define(SOCKET_SUPPORTS_IPV6, 16#0003). + + +%% =========================================================================== +%% +%% Administrative and utility API +%% +%% =========================================================================== + +-spec on_load() -> ok. + +%% Should we require that the Extra arg is a map? +on_load() -> + on_load(#{}). + +-spec on_load(Extra) -> ok when + Extra :: map(). + +on_load(Extra) -> + ok = erlang:load_nif(atom_to_list(?MODULE), Extra). + + + +-spec info() -> list(). + +info() -> + nif_info(). + + + +%% =========================================================================== +%% +%% supports - get information about what the platform "supports". +%% +%% Generates a list of various info about what the plaform can support. +%% The most obvious case is 'options'. +%% +%% Each item in a 'supports'-list will appear only *one* time. +%% +%% =========================================================================== + +-type supports_options_socket() :: [{socket_option(), boolean()}]. +-type supports_options_ip() :: [{ip_socket_option(), boolean()}]. +-type supports_options_ipv6() :: [{ipv6_socket_option(), boolean()}]. +-type supports_options_tcp() :: [{tcp_socket_option(), boolean()}]. +-type supports_options_udp() :: [{udp_socket_option(), boolean()}]. +-type supports_options_sctp() :: [{sctp_socket_option(), boolean()}]. +-type supports_options() :: [{socket, supports_options_socket()} | + {ip, supports_options_ip()} | + {ipv6, supports_options_ipv6()} | + {tcp, supports_options_tcp()} | + {udp, supports_options_udp()} | + {sctp, supports_options_sctp()}]. + +-spec supports() -> [{options, supports_options()} | + {sctp, boolean()} | + {ipv6, boolean()}]. + +supports() -> + [{options, supports(options)}, + {sctp, supports(sctp)}, + {ipv6, supports(ipv6)}]. + + +-dialyzer({nowarn_function, supports/1}). +-spec supports(options) -> supports_options(); + (sctp) -> boolean(); + (ipv6) -> boolean(); + (Key1) -> false when + Key1 :: term(). + +supports(options) -> + nif_supports(?SOCKET_SUPPORTS_OPTIONS); +supports(sctp) -> + nif_supports(?SOCKET_SUPPORTS_SCTP); +supports(ipv6) -> + nif_supports(?SOCKET_SUPPORTS_IPV6); +supports(_Key1) -> + false. + +-dialyzer({nowarn_function, supports/2}). +-spec supports(options, socket) -> supports_options_socket(); + (options, ip) -> supports_options_ip(); + (options, ipv6) -> supports_options_ipv6(); + (options, tcp) -> supports_options_tcp(); + (options, udp) -> supports_options_udp(); + (options, sctp) -> supports_options_sctp(); + (Key1, Key2) -> false when + Key1 :: term(), + Key2 :: term(). + +supports(options, Level) -> + proplists:get_value(Level, supports(options), false); +supports(_Key1, _Level) -> + false. + + +-dialyzer({nowarn_function, supports/3}). +-spec supports(options, socket, Opt) -> boolean() when + Opt :: socket_option(); + (options, ip, Opt) -> boolean() when + Opt :: ip_socket_option(); + (options, ipv6, Opt) -> boolean() when + Opt :: ipv6_socket_option(); + (options, tcp, Opt) -> boolean() when + Opt :: tcp_socket_option(); + (options, udp, Opt) -> boolean() when + Opt :: udp_socket_option(); + (options, sctp, Opt) -> boolean() when + Opt :: sctp_socket_option(); + (Key1, Key2, Key3) -> false when + Key1 :: term(), + Key2 :: term(), + Key3 :: term(). + +supports(options, Level, Opt) -> + case supports(options, Level) of + S when is_list(S) -> + proplists:get_value(Opt, S, false); + _ -> + false + end; +supports(_Key1, _Key2, _Key3) -> + false. + + + +%% =========================================================================== +%% +%% The proper socket API +%% +%% =========================================================================== + +%% =========================================================================== +%% +%% open - create an endpoint for communication +%% +%% Extra: netns +%% +%% <KOLLA> +%% +%% How do we handle the case when an fd has been created (somehow) +%% and we shall create a socket "from it". +%% Can we figure out Domain, Type and Protocol from fd? +%% Yes we can: SO_DOMAIN, SO_PROTOCOL, SO_TYPE +%% But does that work on all platforms? Or shall we require that the +%% caller provide this explicitly? +%% +%% </KOLLA> +%% +%% +%% <KOLLA> +%% +%% Start a controller process here, *before* the nif_open call. +%% If that call is successful, update with owner process (controlling +%% process) and SockRef. If the open fails, kill the process. +%% "Register" the process on success: +%% +%% nif_register(SockRef, self()). +%% +%% <ALSO> +%% +%% Maybe register the process under a name? +%% Something like: +%% +%% list_to_atom(lists:flatten(io_lib:format("socket-~p", [SockRef]))). +%% +%% </ALSO> +%% +%% The nif sets up a monitor to this process, and if it dies the socket +%% is closed. It is also used if someone wants to monitor the socket. +%% +%% We therefor need monitor function(s): +%% +%% socket:monitor(Socket) +%% socket:demonitor(Socket) +%% +%% These are basically used to monitor the controller process. +%% Should the socket record therefor contain the pid of the controller process? +%% +%% </KOLLA> +%% + +%% -spec open(FD) -> {ok, Socket} | {error, Reason} when +%% Socket :: socket(), +%% Reason :: term(). + +%% open(FD) -> +%% try +%% begin +%% case nif_open(FD) of +%% {ok, {SockRef, Domain, Type, Protocol}} -> +%% SocketInfo = #{domain => Domain, +%% type => Type, +%% protocol => Protocol}, +%% Socket = #socket{info = SocketInfo, +%% ref = SockRef}, +%% {ok, Socket}; +%% {error, _} = ERROR -> +%% ERROR +%% end +%% end +%% catch +%% _:_ -> % This must be improved!! +%% {error, einval} +%% end. + +-spec open(Domain, Type) -> {ok, Socket} | {error, Reason} when + Domain :: domain(), + Type :: type(), + Socket :: socket(), + Reason :: term(). + +open(Domain, Type) -> + open(Domain, Type, null). + +-spec open(Domain, Type, Protocol) -> {ok, Socket} | {error, Reason} when + Domain :: domain(), + Type :: type(), + Protocol :: null | protocol(), + Socket :: socket(), + Reason :: term(). + +open(Domain, Type, Protocol) -> + open(Domain, Type, Protocol, #{}). + +-spec open(Domain, Type, Protocol, Extra) -> {ok, Socket} | {error, Reason} when + Domain :: domain(), + Type :: type(), + Protocol :: null | protocol(), + Extra :: map(), + Socket :: socket(), + Reason :: term(). + +open(Domain, Type, Protocol0, Extra) when is_map(Extra) -> + try + begin + Protocol = default_protocol(Protocol0, Type), + EDomain = enc_domain(Domain), + EType = enc_type(Domain, Type), + EProtocol = enc_protocol(Type, Protocol), + case nif_open(EDomain, EType, EProtocol, Extra) of + {ok, SockRef} -> + Socket = #socket{ref = SockRef}, + {ok, Socket}; + {error, _} = ERROR -> + ERROR + end + end + catch + throw:T -> + T; + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + error:Reason -> + {error, Reason} + end. + +%% Note that this is just a convenience function for when the protocol was +%% not specified. If its actually specified, then that will be selected. +%% Also, this only works for the some of the type's (stream, dgram and +%% seqpacket). +default_protocol(null, stream) -> tcp; +default_protocol(null, dgram) -> udp; +default_protocol(null, seqpacket) -> sctp; +default_protocol(null, Type) -> throw({error, {no_default_protocol, Type}}); +default_protocol(Protocol, _) -> Protocol. + + +%% =========================================================================== +%% +%% bind - bind a name to a socket +%% + +-spec bind(Socket, Addr) -> ok | {error, Reason} when + Socket :: socket(), + Addr :: any | loopback | sockaddr(), + Reason :: term(). + +bind(#socket{ref = SockRef}, Addr) + when ((Addr =:= any) orelse (Addr =:= loopback)) -> + try which_domain(SockRef) of + inet -> + nif_bind(SockRef, ?SOCKADDR_IN4_DEFAULT(Addr)); + inet6 -> + nif_bind(SockRef, ?SOCKADDR_IN6_DEFAULT(Addr)) + catch + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + throw:ERROR -> + ERROR + end; +bind(#socket{ref = SockRef} = _Socket, Addr) when is_map(Addr) -> + try + begin + nif_bind(SockRef, ensure_sockaddr(Addr)) + end + catch + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + throw:ERROR -> + ERROR + end. + + + +%% =========================================================================== +%% +%% bind - Add or remove a bind addresses on a socket +%% +%% Calling this function is only valid if the socket is: +%% type = seqpacket +%% protocol = sctp +%% +%% If the domain is inet, then all addresses *must* be IPv4. +%% If the domain is inet6, the addresses can be aither IPv4 or IPv6. +%% + +-spec bind(Socket, Addrs, Action) -> ok | {error, Reason} when + Socket :: socket(), + Addrs :: [sockaddr()], + Action :: add | remove, + Reason :: term(). + +bind(#socket{ref = SockRef}, Addrs, Action) + when is_list(Addrs) andalso ((Action =:= add) orelse (Action =:= remove)) -> + try + begin + ensure_type(SockRef, seqpacket), + ensure_proto(SockRef, sctp), + validate_addrs(which_domain(SockRef), Addrs), + nif_bind(SockRef, Addrs, Action) + end + catch + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + throw:ERROR -> + ERROR + end. + +ensure_type(SockRef, Type) -> + case which_type(SockRef) of + Type -> + ok; + _InvalidType -> + einval() + end. + +ensure_proto(SockRef, Proto) -> + case which_protocol(SockRef) of + Proto -> + ok; + _InvalidProto -> + einval() + end. + +validate_addrs(inet = _Domain, Addrs) -> + validate_inet_addrs(Addrs); +validate_addrs(inet6 = _Domain, Addrs) -> + validate_inet6_addrs(Addrs). + +validate_inet_addrs(Addrs) -> + Validator = fun(#{family := inet, + addrs := Addr}) when is_tuple(Addr) andalso + (size(Addr) =:= 4) -> + ok; + (X) -> + throw({error, {invalid_address, X}}) + end, + lists:foreach(Validator, Addrs). + +validate_inet6_addrs(Addrs) -> + Validator = fun(#{family := inet, + addrs := Addr}) when is_tuple(Addr) andalso + (size(Addr) =:= 4) -> + ok; + (#{family := inet6, + addrs := Addr}) when is_tuple(Addr) andalso + (size(Addr) =:= 8) -> + ok; + (X) -> + throw({error, {invalid_address, X}}) + end, + lists:foreach(Validator, Addrs). + + +%% =========================================================================== +%% +%% connect - initiate a connection on a socket +%% + +-spec connect(Socket, SockAddr) -> ok | {error, Reason} when + Socket :: socket(), + SockAddr :: sockaddr(), + Reason :: term(). + +connect(Socket, SockAddr) -> + connect(Socket, SockAddr, infinity). + +-spec connect(Socket, SockAddr, Timeout) -> ok | {error, Reason} when + Socket :: socket(), + SockAddr :: sockaddr(), + Timeout :: timeout(), + Reason :: term(). + +%% <KOLLA> +%% Is it possible to connect with family = local for the (dest) sockaddr? +%% </KOLLA> +connect(_Socket, _SockAddr, Timeout) + when (is_integer(Timeout) andalso (Timeout =< 0)) -> + {error, timeout}; +connect(#socket{ref = SockRef}, #{family := Fam} = SockAddr, Timeout) + when ((Fam =:= inet) orelse (Fam =:= inet6) orelse (Fam =:= local)) andalso + ((Timeout =:= infinity) orelse is_integer(Timeout)) -> + TS = timestamp(Timeout), + case nif_connect(SockRef, SockAddr) of + ok -> + %% Connected! + ok; + {ok, Ref} -> + %% Connecting... + NewTimeout = next_timeout(TS, Timeout), + receive + {select, SockRef, Ref, ready_output} -> + %% <KOLLA> + %% + %% See open above!! + %% + %% * Here we should start and *register* the reader process + %% (This will cause the nif code to create a monitor to + %% the process) + %% * The reader is basically used to implement the active-X + %% feature! + %% * If the reader dies for whatever reason, then the socket + %% (resource) closes and the owner (controlling) process + %% is informed (closed message). + %% + %% </KOLLA> + nif_finalize_connection(SockRef) + after NewTimeout -> + cancel(SockRef, connect, Ref), + {error, timeout} + end; + {error, _} = ERROR -> + ERROR + end. + + +%% =========================================================================== +%% +%% listen - listen for connections on a socket +%% + +-spec listen(Socket) -> ok | {error, Reason} when + Socket :: socket(), + Reason :: term(). + +listen(Socket) -> + listen(Socket, ?SOCKET_LISTEN_BACKLOG_DEFAULT). + +-spec listen(Socket, Backlog) -> ok | {error, Reason} when + Socket :: socket(), + Backlog :: pos_integer(), + Reason :: term(). + +listen(#socket{ref = SockRef}, Backlog) + when (is_integer(Backlog) andalso (Backlog >= 0)) -> + nif_listen(SockRef, Backlog). + + + + +%% =========================================================================== +%% +%% accept, accept4 - accept a connection on a socket +%% + +-spec accept(LSocket) -> {ok, Socket} | {error, Reason} when + LSocket :: socket(), + Socket :: socket(), + Reason :: term(). + +accept(Socket) -> + accept(Socket, ?SOCKET_ACCEPT_TIMEOUT_DEFAULT). + +-spec accept(LSocket, Timeout) -> {ok, Socket} | {error, Reason} when + LSocket :: socket(), + Timeout :: timeout(), + Socket :: socket(), + Reason :: term(). + +%% Do we really need this optimization? +accept(_, Timeout) when is_integer(Timeout) andalso (Timeout =< 0) -> + {error, timeout}; +accept(#socket{ref = LSockRef}, Timeout) + when is_integer(Timeout) orelse (Timeout =:= infinity) -> + do_accept(LSockRef, Timeout). + +do_accept(LSockRef, Timeout) -> + TS = timestamp(Timeout), + AccRef = make_ref(), + case nif_accept(LSockRef, AccRef) of + {ok, SockRef} -> + %% <KOLLA> + %% + %% * Here we should start and *register* the reader process + %% (This will cause the nif code to create a monitor to the process) + %% * The reader is basically used to implement the active-X feature! + %% * If the reader dies for whatever reason, then the socket (resource) + %% closes and the owner (controlling) process is informed (closed + %% message). + %% + %% </KOLLA> + Socket = #socket{ref = SockRef}, + {ok, Socket}; + + {error, eagain} -> + %% Each call is non-blocking, but even then it takes + %% *some* time, so just to be sure, recalculate before + %% the receive. + NewTimeout = next_timeout(TS, Timeout), + receive + {select, LSockRef, AccRef, ready_input} -> + do_accept(LSockRef, next_timeout(TS, Timeout)); + + {'$socket', _, abort, {AccRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(LSockRef, accept, AccRef), + {error, timeout} + end; + + {error, _} = ERROR -> + cancel(LSockRef, accept, AccRef), % Just to be on the safe side... + ERROR + end. + + + +%% =========================================================================== +%% +%% send, sendto, sendmsg - send a message on a socket +%% + +-spec send(Socket, Data) -> ok | {error, Reason} when + Socket :: socket(), + Data :: iodata(), + Reason :: term(). + +send(Socket, Data) -> + send(Socket, Data, ?SOCKET_SEND_FLAGS_DEFAULT, ?SOCKET_SEND_TIMEOUT_DEFAULT). + +-spec send(Socket, Data, Flags) -> ok | {error, Reason} when + Socket :: socket(), + Data :: iodata(), + Flags :: send_flags(), + Reason :: term() + ; (Socket, Data, Timeout) -> ok | {error, Reason} when + Socket :: socket(), + Data :: iodata(), + Timeout :: timeout(), + Reason :: term(). + +send(Socket, Data, Flags) when is_list(Flags) -> + send(Socket, Data, Flags, ?SOCKET_SEND_TIMEOUT_DEFAULT); +send(Socket, Data, Timeout) -> + send(Socket, Data, ?SOCKET_SEND_FLAGS_DEFAULT, Timeout). + +-spec send(Socket, Data, Flags, Timeout) -> ok | {error, Reason} when + Socket :: socket(), + Data :: iodata(), + Flags :: send_flags(), + Timeout :: timeout(), + Reason :: term(). + +send(Socket, Data, Flags, Timeout) when is_list(Data) -> + Bin = erlang:list_to_binary(Data), + send(Socket, Bin, Flags, Timeout); +send(#socket{ref = SockRef}, Data, Flags, Timeout) + when is_binary(Data) andalso is_list(Flags) -> + EFlags = enc_send_flags(Flags), + do_send(SockRef, Data, EFlags, Timeout). + +do_send(SockRef, Data, EFlags, Timeout) -> + TS = timestamp(Timeout), + SendRef = make_ref(), + case nif_send(SockRef, SendRef, Data, EFlags) of + ok -> + ok; + {ok, Written} -> + NewTimeout = next_timeout(TS, Timeout), + %% We are partially done, wait for continuation + receive + {select, SockRef, SendRef, ready_output} when (Written > 0) -> + <<_:Written/binary, Rest/binary>> = Data, + do_send(SockRef, Rest, EFlags, + next_timeout(TS, Timeout)); + {select, SockRef, SendRef, ready_output} -> + do_send(SockRef, Data, EFlags, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {SendRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(SockRef, send, SendRef), + {error, {timeout, size(Data)}} + end; + {error, eagain} -> + receive + {select, SockRef, SendRef, ready_output} -> + do_send(SockRef, Data, EFlags, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {SendRef, Reason}} -> + {error, Reason} + + after Timeout -> + cancel(SockRef, send, SendRef), + {error, {timeout, size(Data)}} + end; + + {error, _} = ERROR -> + ERROR + end. + + + + +%% --------------------------------------------------------------------------- +%% + +-spec sendto(Socket, Data, Dest) -> + ok | {error, Reason} when + Socket :: socket(), + Data :: binary(), + Dest :: null | sockaddr(), + Reason :: term(). + +sendto(Socket, Data, Dest) -> + sendto(Socket, Data, Dest, ?SOCKET_SENDTO_FLAGS_DEFAULT). + +-spec sendto(Socket, Data, Dest, Flags) -> ok | {error, Reason} when + Socket :: socket(), + Data :: binary(), + Dest :: null | sockaddr(), + Flags :: send_flags(), + Reason :: term() + ; (Socket, Data, Dest, Timeout) -> ok | {error, Reason} when + Socket :: socket(), + Data :: iodata(), + Dest :: null | sockaddr(), + Timeout :: timeout(), + Reason :: term(). + +sendto(Socket, Data, Dest, Flags) when is_list(Flags) -> + sendto(Socket, Data, Dest, Flags, ?SOCKET_SENDTO_TIMEOUT_DEFAULT); +sendto(Socket, Data, Dest, Timeout) -> + sendto(Socket, Data, Dest, ?SOCKET_SENDTO_FLAGS_DEFAULT, Timeout). + + +-spec sendto(Socket, Data, Dest, Flags, Timeout) -> ok | {error, Reason} when + Socket :: socket(), + Data :: binary(), + Dest :: null | sockaddr(), + Flags :: send_flags(), + Timeout :: timeout(), + Reason :: term(). + +sendto(Socket, Data, Dest, Flags, Timeout) when is_list(Data) -> + Bin = erlang:list_to_binary(Data), + sendto(Socket, Bin, Dest, Flags, Timeout); +sendto(#socket{ref = SockRef}, Data, Dest, Flags, Timeout) + when is_binary(Data) andalso + (Dest =:= null) andalso + is_list(Flags) andalso + (is_integer(Timeout) orelse (Timeout =:= infinity)) -> + EFlags = enc_send_flags(Flags), + do_sendto(SockRef, Data, Dest, EFlags, Timeout); +sendto(#socket{ref = SockRef}, Data, #{family := Fam} = Dest, Flags, Timeout) + when is_binary(Data) andalso + ((Fam =:= inet) orelse (Fam =:= inet6) orelse (Fam =:= local)) andalso + is_list(Flags) andalso + (is_integer(Timeout) orelse (Timeout =:= infinity)) -> + EFlags = enc_send_flags(Flags), + do_sendto(SockRef, Data, Dest, EFlags, Timeout). + +do_sendto(SockRef, Data, Dest, EFlags, Timeout) -> + TS = timestamp(Timeout), + SendRef = make_ref(), + case nif_sendto(SockRef, SendRef, Data, Dest, EFlags) of + ok -> + %% We are done + ok; + + {ok, Written} -> + %% We are partially done, wait for continuation + receive + {select, SockRef, SendRef, ready_output} when (Written > 0) -> + <<_:Written/binary, Rest/binary>> = Data, + do_sendto(SockRef, Rest, Dest, EFlags, + next_timeout(TS, Timeout)); + {select, SockRef, SendRef, ready_output} -> + do_sendto(SockRef, Data, Dest, EFlags, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {SendRef, Reason}} -> + {error, Reason} + + after Timeout -> + cancel(SockRef, sendto, SendRef), + {error, timeout} + end; + + {error, eagain} -> + receive + {select, SockRef, SendRef, ready_output} -> + do_sendto(SockRef, Data, Dest, EFlags, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {SendRef, Reason}} -> + {error, Reason} + + after Timeout -> + cancel(SockRef, sendto, SendRef), + {error, timeout} + end; + + {error, _} = ERROR -> + ERROR + end. + + + +%% --------------------------------------------------------------------------- +%% +%% The only part of the msghdr() that *must* exist (a connected +%% socket need not specify the addr field) is the iov. +%% The ctrl field is optional, and the addr and flags are not +%% used when sending. +%% + +-spec sendmsg(Socket, MsgHdr) -> ok | {error, Reason} when + Socket :: socket(), + MsgHdr :: msghdr(), + Reason :: term(). + +sendmsg(Socket, MsgHdr) -> + sendmsg(Socket, MsgHdr, + ?SOCKET_SENDMSG_FLAGS_DEFAULT, ?SOCKET_SENDMSG_TIMEOUT_DEFAULT). + + +-spec sendmsg(Socket, MsgHdr, Flags) -> ok | {error, Reason} when + Socket :: socket(), + MsgHdr :: msghdr(), + Flags :: send_flags(), + Reason :: term() + ; (Socket, MsgHdr, Timeout) -> ok | {error, Reason} when + Socket :: socket(), + MsgHdr :: msghdr(), + Timeout :: timeout(), + Reason :: term(). + +sendmsg(Socket, MsgHdr, Flags) when is_list(Flags) -> + sendmsg(Socket, MsgHdr, Flags, ?SOCKET_SENDMSG_TIMEOUT_DEFAULT); +sendmsg(Socket, MsgHdr, Timeout) + when is_integer(Timeout) orelse (Timeout =:= infinity) -> + sendmsg(Socket, MsgHdr, ?SOCKET_SENDMSG_FLAGS_DEFAULT, Timeout). + + +-spec sendmsg(Socket, MsgHdr, Flags, Timeout) -> ok | {ok, Remaining} | {error, Reason} when + Socket :: socket(), + MsgHdr :: msghdr(), + Flags :: send_flags(), + Timeout :: timeout(), + Remaining :: erlang:iovec(), + Reason :: term(). + +sendmsg(#socket{ref = SockRef}, #{iov := IOV} = MsgHdr, Flags, Timeout) + when is_list(IOV) andalso + is_list(Flags) andalso + (is_integer(Timeout) orelse (Timeout =:= infinity)) -> + try ensure_msghdr(MsgHdr) of + M -> + EFlags = enc_send_flags(Flags), + do_sendmsg(SockRef, M, EFlags, Timeout) + catch + throw:T -> + T; + error:Reason -> + {error, Reason} + end. + +do_sendmsg(SockRef, MsgHdr, EFlags, Timeout) -> + TS = timestamp(Timeout), + SendRef = make_ref(), + case nif_sendmsg(SockRef, SendRef, MsgHdr, EFlags) of + ok -> + %% We are done + ok; + + {ok, Written} when is_integer(Written) andalso (Written > 0) -> + + %% We should not retry here since the protocol may not + %% be able to handle a message being split. Leave it to + %% the caller to figure out (call again with the rest). + %% + %% We should really not need to cancel, since this is + %% accepted for sendmsg! + %% + cancel(SockRef, sendmsg, SendRef), + {ok, do_sendmsg_rest(maps:get(iov, MsgHdr), Written)}; + + {error, eagain} -> + receive + {select, SockRef, SendRef, ready_output} -> + do_sendmsg(SockRef, MsgHdr, EFlags, + next_timeout(TS, Timeout)) + after Timeout -> + cancel(SockRef, sendmsg, SendRef), + {error, timeout} + end; + + {error, _} = ERROR -> + ERROR + end. + +do_sendmsg_rest([B|IOVec], Written) when (Written >= size(B)) -> + do_sendmsg_rest(IOVec, Written - size(B)); +do_sendmsg_rest([B|IOVec], Written) -> + <<_:Written/binary, Rest/binary>> = B, + [Rest|IOVec]. + +ensure_msghdr(#{ctrl := []} = M) -> + ensure_msghdr(maps:remove(ctrl, M)); +ensure_msghdr(#{iov := IOV} = M) when is_list(IOV) andalso (IOV =/= []) -> + M#{iov := erlang:iolist_to_iovec(IOV)}; +ensure_msghdr(_) -> + einval(). + + + + +%% =========================================================================== +%% +%% writev - write data into multiple buffers +%% + + + +%% =========================================================================== +%% +%% recv, recvfrom, recvmsg - receive a message from a socket +%% +%% Description: +%% There is a special case for the argument Length. If its set to zero (0), +%% it means "give me everything you have". +%% +%% Returns: {ok, Binary} | {error, Reason} +%% Binary - The received data as a binary +%% Reason - The error reason: +%% timeout | {timeout, AccData} | +%% posix() | {posix(), AccData} | +%% atom() | {atom(), AccData} +%% AccData - The data (as a binary) that we did manage to receive +%% before the timeout. +%% +%% Arguments: +%% Socket - The socket to read from. +%% Length - The number of bytes to read. +%% Flags - A list of "options" for the read. +%% Timeout - Time-out in milliseconds. + +-spec recv(Socket) -> {ok, Data} | {error, Reason} when + Socket :: socket(), + Data :: binary(), + Reason :: term(). + +recv(Socket) -> + recv(Socket, 0). + +-spec recv(Socket, Length) -> {ok, Data} | {error, Reason} when + Socket :: socket(), + Length :: non_neg_integer(), + Data :: binary(), + Reason :: term(). + +recv(Socket, Length) -> + recv(Socket, Length, + ?SOCKET_RECV_FLAGS_DEFAULT, + ?SOCKET_RECV_TIMEOUT_DEFAULT). + +-spec recv(Socket, Length, Flags) -> {ok, Data} | {error, Reason} when + Socket :: socket(), + Length :: non_neg_integer(), + Flags :: recv_flags(), + Data :: binary(), + Reason :: term() + ; (Socket, Length, Timeout) -> {ok, Data} | {error, Reason} when + Socket :: socket(), + Length :: non_neg_integer(), + Timeout :: timeout(), + Data :: binary(), + Reason :: term(). + +recv(Socket, Length, Flags) when is_list(Flags) -> + recv(Socket, Length, Flags, ?SOCKET_RECV_TIMEOUT_DEFAULT); +recv(Socket, Length, Timeout) -> + recv(Socket, Length, ?SOCKET_RECV_FLAGS_DEFAULT, Timeout). + +-spec recv(Socket, Length, Flags, Timeout) -> {ok, Data} | {error, Reason} when + Socket :: socket(), + Length :: non_neg_integer(), + Flags :: recv_flags(), + Timeout :: timeout(), + Data :: binary(), + Reason :: term(). + +recv(#socket{ref = SockRef}, Length, Flags, Timeout) + when (is_integer(Length) andalso (Length >= 0)) andalso + is_list(Flags) andalso + (is_integer(Timeout) orelse (Timeout =:= infinity)) -> + EFlags = enc_recv_flags(Flags), + do_recv(SockRef, undefined, Length, EFlags, <<>>, Timeout). + +%% We need to pass the "old recv ref" around because of the special case +%% with Length = 0. This case makes it neccessary to have a timeout function +%% clause since we may never wait for anything (no receive select), and so the +%% the only timeout check will be the function clause. +do_recv(SockRef, _OldRef, Length, EFlags, Acc, Timeout) + when (Timeout =:= infinity) orelse + (is_integer(Timeout) andalso (Timeout > 0)) -> + TS = timestamp(Timeout), + RecvRef = make_ref(), + %% p("do_recv -> try read with" + %% "~n Length: ~p", [Length]), + case nif_recv(SockRef, RecvRef, Length, EFlags) of + {ok, true = _Complete, Bin} when (size(Acc) =:= 0) -> + %% p("do_recv -> complete success: ~w", [size(Bin)]), + {ok, Bin}; + {ok, true = _Complete, Bin} -> + %% p("do_recv -> completed success: ~w (~w)", [size(Bin), size(Acc)]), + {ok, <<Acc/binary, Bin/binary>>}; + + %% It depends on the amount of bytes we tried to read: + %% 0 - Read everything available + %% We got something, but there may be more - keep reading. + %% > 0 - We got a part of the message and we will be notified + %% when there is more to read (a select message) + {ok, false = _Complete, Bin} when (Length =:= 0) -> + %% p("do_recv -> partial success: ~w", [size(Bin)]), + do_recv(SockRef, RecvRef, + Length, EFlags, + <<Acc/binary, Bin/binary>>, + next_timeout(TS, Timeout)); + + {ok, false = _Completed, Bin} when (size(Acc) =:= 0) -> + %% We got the first chunk of it. + %% We will be notified (select message) when there + %% is more to read. + %% p("do_recv -> partial success(~w): ~w" + %% "~n ~p", [Length, size(Bin), Bin]), + NewTimeout = next_timeout(TS, Timeout), + receive + {select, SockRef, RecvRef, ready_input} -> + do_recv(SockRef, RecvRef, + Length-size(Bin), EFlags, + Bin, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {RecvRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(SockRef, recv, RecvRef), + {error, {timeout, Acc}} + end; + + {ok, false = _Completed, Bin} -> + %% We got a chunk of it! + %% p("do_recv -> partial success(~w): ~w (~w)", + %% [Length, size(Bin), size(Acc)]), + NewTimeout = next_timeout(TS, Timeout), + receive + {select, SockRef, RecvRef, ready_input} -> + do_recv(SockRef, RecvRef, + Length-size(Bin), EFlags, + <<Acc/binary, Bin/binary>>, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {RecvRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(SockRef, recv, RecvRef), + {error, {timeout, Acc}} + end; + + %% We return with the accumulated binary (if its non-empty) + {error, eagain} when (Length =:= 0) andalso (size(Acc) > 0) -> + %% CAN WE REALLY DO THIS? THE NIF HAS SELECTED!! OR? + {ok, Acc}; + + {error, eagain} -> + %% There is nothing just now, but we will be notified when there + %% is something to read (a select message). + %% p("do_recv -> eagain(~w): ~w", [Length, size(Acc)]), + NewTimeout = next_timeout(TS, Timeout), + receive + {select, SockRef, RecvRef, ready_input} -> + do_recv(SockRef, RecvRef, + Length, EFlags, + Acc, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {RecvRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(SockRef, recv, RecvRef), + {error, timeout} + end; + + {error, closed = Reason} -> + do_close(SockRef), + if + (size(Acc) =:= 0) -> + {error, Reason}; + true -> + {error, {Reason, Acc}} + end; + + {error, _} = ERROR when (size(Acc) =:= 0) -> + ERROR; + + {error, Reason} -> + {error, {Reason, Acc}} + + end; + +do_recv(SockRef, RecvRef, 0 = _Length, _Eflags, Acc, _Timeout) -> + %% The current recv operation is to be cancelled, so no need for a ref... + %% The cancel will end our 'read everything you have' and "activate" + %% any waiting reader. + cancel(SockRef, recv, RecvRef), + {ok, Acc}; +do_recv(_SockRef, _RecvRef, _Length, _EFlags, Acc, _Timeout) + when (size(Acc) > 0) -> + {error, {timeout, Acc}}; +do_recv(_SockRef, _RecvRef, _Length, _EFlags, _Acc, _Timeout) -> + {error, timeout}. + + + +%% --------------------------------------------------------------------------- +%% +%% With recvfrom we get messages, which means that regardless of how +%% much we want to read, we return when we get a message. +%% The MaxSize argument basically defines the size of our receive +%% buffer. By setting the size to zero (0), we use the configured +%% size (see setopt). +%% It may be impossible to know what (buffer) size is appropriate +%% "in advance", and in those cases it may be convenient to use the +%% (recv) 'peek' flag. When this flag is provided the message is *not* +%% "consumed" from the underlying buffers, so another recvfrom call +%% is needed, possibly with a then adjusted buffer size. +%% + +-spec recvfrom(Socket) -> {ok, {Source, Data}} | {error, Reason} when + Socket :: socket(), + Source :: sockaddr() | undefined, + Data :: binary(), + Reason :: term(). + +recvfrom(Socket) -> + recvfrom(Socket, 0). + +-spec recvfrom(Socket, BufSz) -> {ok, {Source, Data}} | {error, Reason} when + Socket :: socket(), + BufSz :: non_neg_integer(), + Source :: sockaddr() | undefined, + Data :: binary(), + Reason :: term(). + +recvfrom(Socket, BufSz) -> + recvfrom(Socket, BufSz, + ?SOCKET_RECV_FLAGS_DEFAULT, + ?SOCKET_RECV_TIMEOUT_DEFAULT). + +-spec recvfrom(Socket, Flags, Timeout) -> + {ok, {Source, Data}} | {error, Reason} when + Socket :: socket(), + Flags :: recv_flags(), + Timeout :: timeout(), + Source :: sockaddr() | undefined, + Data :: binary(), + Reason :: term() + ; (Socket, BufSz, Flags) -> + {ok, {Source, Data}} | {error, Reason} when + Socket :: socket(), + BufSz :: non_neg_integer(), + Flags :: recv_flags(), + Source :: sockaddr() | undefined, + Data :: binary(), + Reason :: term() + ; (Socket, BufSz, Timeout) -> + {ok, {Source, Data}} | {error, Reason} when + Socket :: socket(), + BufSz :: non_neg_integer(), + Timeout :: timeout(), + Source :: sockaddr() | undefined, + Data :: binary(), + Reason :: term(). + +recvfrom(Socket, Flags, Timeout) when is_list(Flags) -> + recvfrom(Socket, 0, Flags, Timeout); +recvfrom(Socket, BufSz, Flags) when is_list(Flags) -> + recvfrom(Socket, BufSz, Flags, ?SOCKET_RECV_TIMEOUT_DEFAULT); +recvfrom(Socket, BufSz, Timeout) -> + recvfrom(Socket, BufSz, ?SOCKET_RECV_FLAGS_DEFAULT, Timeout). + +-spec recvfrom(Socket, BufSz, Flags, Timeout) -> + {ok, {Source, Data}} | {error, Reason} when + Socket :: socket(), + BufSz :: non_neg_integer(), + Flags :: recv_flags(), + Timeout :: timeout(), + Source :: sockaddr() | undefined, + Data :: binary(), + Reason :: term(). + +recvfrom(#socket{ref = SockRef}, BufSz, Flags, Timeout) + when (is_integer(BufSz) andalso (BufSz >= 0)) andalso + is_list(Flags) andalso + (is_integer(Timeout) orelse (Timeout =:= infinity)) -> + EFlags = enc_recv_flags(Flags), + do_recvfrom(SockRef, BufSz, EFlags, Timeout). + +do_recvfrom(SockRef, BufSz, EFlags, Timeout) -> + TS = timestamp(Timeout), + RecvRef = make_ref(), + case nif_recvfrom(SockRef, RecvRef, BufSz, EFlags) of + {ok, {_Source, _NewData}} = OK -> + OK; + + {error, eagain} -> + %% There is nothing just now, but we will be notified when there + %% is something to read (a select message). + NewTimeout = next_timeout(TS, Timeout), + receive + {select, SockRef, RecvRef, ready_input} -> + do_recvfrom(SockRef, BufSz, EFlags, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {RecvRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(SockRef, recvfrom, RecvRef), + {error, timeout} + end; + + {error, _Reason} = ERROR -> + ERROR + + end. + +%% pi(Item) -> +%% pi(self(), Item). + +%% pi(Pid, Item) -> +%% {Item, Info} = process_info(Pid, Item), +%% Info. + + +%% --------------------------------------------------------------------------- +%% + +-spec recvmsg(Socket) -> {ok, MsgHdr} | {error, Reason} when + Socket :: socket(), + MsgHdr :: msghdr(), + Reason :: term(). + +recvmsg(Socket) -> + recvmsg(Socket, 0, 0, + ?SOCKET_RECV_FLAGS_DEFAULT, ?SOCKET_RECV_TIMEOUT_DEFAULT). + +-spec recvmsg(Socket, Flags) -> {ok, MsgHdr} | {error, Reason} when + Socket :: socket(), + Flags :: recv_flags(), + MsgHdr :: msghdr(), + Reason :: term() + ; (Socket, Timeout) -> {ok, MsgHdr} | {error, Reason} when + Socket :: socket(), + Timeout :: timeout(), + MsgHdr :: msghdr(), + Reason :: term(). + +recvmsg(Socket, Flags) when is_list(Flags) -> + recvmsg(Socket, 0, 0, Flags, ?SOCKET_RECV_TIMEOUT_DEFAULT); +recvmsg(Socket, Timeout) -> + recvmsg(Socket, 0, 0, ?SOCKET_RECV_FLAGS_DEFAULT, Timeout). + +-spec recvmsg(Socket, Flags, Timeout) -> {ok, MsgHdr} | {error, Reason} when + Socket :: socket(), + Flags :: recv_flags(), + Timeout :: timeout(), + MsgHdr :: msghdr(), + Reason :: term() + ; (Socket, BufSz, CtrlSz) -> {ok, MsgHdr} | {error, Reason} when + Socket :: socket(), + BufSz :: non_neg_integer(), + CtrlSz :: non_neg_integer(), + MsgHdr :: msghdr(), + Reason :: term(). + +recvmsg(Socket, Flags, Timeout) when is_list(Flags) -> + recvmsg(Socket, 0, 0, Flags, Timeout); +recvmsg(Socket, BufSz, CtrlSz) when is_integer(BufSz) andalso is_integer(CtrlSz) -> + recvmsg(Socket, BufSz, CtrlSz, + ?SOCKET_RECV_FLAGS_DEFAULT, ?SOCKET_RECV_TIMEOUT_DEFAULT). + + +-spec recvmsg(Socket, + BufSz, CtrlSz, + Flags, Timeout) -> {ok, MsgHdr} | {error, Reason} when + Socket :: socket(), + BufSz :: non_neg_integer(), + CtrlSz :: non_neg_integer(), + Flags :: recv_flags(), + Timeout :: timeout(), + MsgHdr :: msghdr(), + Reason :: term(). + +recvmsg(#socket{ref = SockRef}, BufSz, CtrlSz, Flags, Timeout) + when (is_integer(BufSz) andalso (BufSz >= 0)) andalso + (is_integer(CtrlSz) andalso (CtrlSz >= 0)) andalso + is_list(Flags) andalso + (is_integer(Timeout) orelse (Timeout =:= infinity)) -> + EFlags = enc_recv_flags(Flags), + do_recvmsg(SockRef, BufSz, CtrlSz, EFlags, Timeout). + +do_recvmsg(SockRef, BufSz, CtrlSz, EFlags, Timeout) -> + TS = timestamp(Timeout), + RecvRef = make_ref(), + case nif_recvmsg(SockRef, RecvRef, BufSz, CtrlSz, EFlags) of + {ok, _MsgHdr} = OK -> + OK; + + {error, eagain} -> + %% There is nothing just now, but we will be notified when there + %% is something to read (a select message). + NewTimeout = next_timeout(TS, Timeout), + receive + {select, SockRef, RecvRef, ready_input} -> + do_recvmsg(SockRef, BufSz, CtrlSz, EFlags, + next_timeout(TS, Timeout)); + + {'$socket', _, abort, {RecvRef, Reason}} -> + {error, Reason} + + after NewTimeout -> + cancel(SockRef, recvmsg, RecvRef), + {error, timeout} + end; + + {error, closed} = ERROR -> + do_close(SockRef), + ERROR; + + {error, _Reason} = ERROR -> + ERROR + + end. + + + +%% =========================================================================== +%% +%% readv - read data into multiple buffers +%% + + + +%% =========================================================================== +%% +%% close - close a file descriptor +%% +%% Closing a socket is a two stage rocket (because of linger). +%% We need to perform the actual socket close while in BLOCKING mode. +%% But that would hang the entire VM, so what we do is divide the +%% close in two steps: +%% 1) nif_close + the socket_stop (nif) callback function +%% This is for everything that can be done safely NON-BLOCKING. +%% 2) nif_finalize_close which is executed by a *dirty* scheduler +%% Before we call the socket close function, we se the socket +%% BLOCKING. Thereby linger is handled properly. + + +-spec close(Socket) -> ok | {error, Reason} when + Socket :: socket(), + Reason :: term(). + +close(#socket{ref = SockRef}) -> + do_close(SockRef). + +do_close(SockRef) -> + case nif_close(SockRef) of + ok -> + nif_finalize_close(SockRef); + {ok, CloseRef} -> + %% We must wait for the socket_stop callback function to + %% complete its work + receive + {'$socket', SockRef, close, CloseRef} -> + nif_finalize_close(SockRef) + end; + {error, _} = ERROR -> + ERROR + end. + + + + +%% =========================================================================== +%% +%% shutdown - shut down part of a full-duplex connection +%% + +-spec shutdown(Socket, How) -> ok | {error, Reason} when + Socket :: socket(), + How :: shutdown_how(), + Reason :: term(). + +shutdown(#socket{ref = SockRef}, How) -> + try + begin + EHow = enc_shutdown_how(How), + nif_shutdown(SockRef, EHow) + end + catch + throw:T -> + T; + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + error:Reason -> + {error, Reason} + end. + + + + +%% =========================================================================== +%% +%% setopt - manipulate individual properties of a socket +%% +%% What properties are valid depend on what kind of socket it is +%% (domain, type and protocol) +%% If its an "invalid" option (or value), we should not crash but return some +%% useful error... +%% +%% <KOLLA> +%% +%% WE NEED TO MAKE SURE THAT THE USER DOES NOT MAKE US BLOCKING +%% AS MUCH OF THE CODE EXPECTS TO BE NON-BLOCKING!! +%% +%% </KOLLA> + +-spec setopt(Socket, otp, otp_socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, socket, socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, ip, ip_socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, ipv6, ipv6_socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, tcp, tcp_socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, udp, udp_socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, sctp, sctp_socket_option(), Value) -> ok | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, Level, Key, Value) -> ok | {error, Reason} when + Socket :: socket(), + Level :: non_neg_integer(), + Key :: non_neg_integer(), + Value :: binary(), + Reason :: term(). + +setopt(#socket{ref = SockRef}, Level, Key, Value) -> + try + begin + Domain = which_domain(SockRef), + Type = which_type(SockRef), + Protocol = which_protocol(SockRef), + {EIsEncoded, ELevel} = enc_setopt_level(Level), + EKey = enc_setopt_key(Level, Key, Domain, Type, Protocol), + EVal = enc_setopt_value(Level, Key, Value, Domain, Type, Protocol), + nif_setopt(SockRef, EIsEncoded, ELevel, EKey, EVal) + end + catch + throw:T -> + T; + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + error:Reason -> + {error, Reason} % Process more? + end. + + + + +%% =========================================================================== +%% +%% getopt - retrieve individual properties of a socket +%% +%% What properties are valid depend on what kind of socket it is +%% (domain, type and protocol). +%% If its an "invalid" option, we should not crash but return some +%% useful error... +%% +%% When specifying level as an integer, and therefor using "native mode", +%% we should make it possible to specify common types instead of the +%% value size. Example: int | bool | {string, pos_integer()} | non_neg_integer() +%% + +-spec getopt(Socket, otp, otp_socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, socket, socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, ip, ip_socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, ipv6, ipv6_socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, tcp, tcp_socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, udp, udp_socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, sctp, sctp_socket_option()) -> {ok, Value} | {error, Reason} when + Socket :: socket(), + Value :: term(), + Reason :: term() + ; (Socket, Level, Key) -> ok | {ok, Value} | {error, Reason} when + Socket :: socket(), + Level :: integer(), + Key :: {NativeOpt, ValueSize}, + NativeOpt :: integer(), + ValueSize :: int | bool | non_neg_integer(), + Value :: term(), + Reason :: term(). + +getopt(#socket{ref = SockRef}, Level, Key) -> + try + begin + Domain = which_domain(SockRef), + Type = which_type(SockRef), + Protocol = which_protocol(SockRef), + {EIsEncoded, ELevel} = enc_getopt_level(Level), + EKey = enc_getopt_key(Level, Key, Domain, Type, Protocol), + %% We may need to decode the value (for the same reason + %% we (may have) needed to encode the value for setopt). + case nif_getopt(SockRef, EIsEncoded, ELevel, EKey) of + ok -> + ok; + {ok, EVal} -> + Val = dec_getopt_value(Level, Key, EVal, + Domain, Type, Protocol), + {ok, Val}; + {error, _} = ERROR -> + ERROR + end + end + catch + throw:E:_S -> + E; + %% <WIN32-TEMPORARY> + error:notsup:S -> + erlang:raise(error, notsup, S); + %% </WIN32-TEMPORARY> + error:Reason:_Stack -> + {error, Reason} % Process more? + end. + + +%% These are internal "shortcut" functions for the options +%% domain, type and protocol. + +-spec which_domain(SockRef) -> Domain when + SockRef :: reference(), + Domain :: domain(). + +which_domain(SockRef) -> + case nif_getopt(SockRef, true, + ?SOCKET_OPT_LEVEL_OTP, ?SOCKET_OPT_OTP_DOMAIN) of + {ok, Domain} -> + Domain; + {error, _} = ERROR -> + throw(ERROR) + end. + + +-spec which_type(SockRef) -> Type when + SockRef :: reference(), + Type :: type(). + +which_type(SockRef) -> + case nif_getopt(SockRef, true, + ?SOCKET_OPT_LEVEL_OTP, ?SOCKET_OPT_OTP_TYPE) of + {ok, Type} -> + Type; + {error, _} = ERROR -> + throw(ERROR) + end. + +-spec which_protocol(SockRef) -> Protocol when + SockRef :: reference(), + Protocol :: protocol(). + +which_protocol(SockRef) -> + case nif_getopt(SockRef, true, + ?SOCKET_OPT_LEVEL_OTP, ?SOCKET_OPT_OTP_PROTOCOL) of + {ok, Proto} -> + Proto; + {error, _} = ERROR -> + throw(ERROR) + end. + + +%% =========================================================================== +%% +%% sockname - return the current address of the socket. +%% +%% + +-spec sockname(Socket) -> {ok, SockAddr} | {error, Reason} when + Socket :: socket(), + SockAddr :: sockaddr(), + Reason :: term(). + +sockname(#socket{ref = SockRef}) -> + nif_sockname(SockRef). + + + +%% =========================================================================== +%% +%% peername - return the address of the peer *connected* to the socket. +%% +%% + +-spec peername(Socket) -> {ok, SockAddr} | {error, Reason} when + Socket :: socket(), + SockAddr :: sockaddr(), + Reason :: term(). + +peername(#socket{ref = SockRef}) -> + nif_peername(SockRef). + + + +%% =========================================================================== +%% +%% Encode / decode +%% +%% =========================================================================== + +-spec enc_domain(Domain) -> non_neg_integer() when + Domain :: domain(). + +enc_domain(local) -> ?SOCKET_DOMAIN_LOCAL; +enc_domain(inet) -> ?SOCKET_DOMAIN_INET; +enc_domain(inet6) -> ?SOCKET_DOMAIN_INET6; +enc_domain(Domain) -> throw({error, {invalid_domain, Domain}}). + +-spec enc_type(Domain, Type) -> non_neg_integer() when + Domain :: domain(), + Type :: type(). + +%% What combos are valid? +enc_type(_, stream) -> ?SOCKET_TYPE_STREAM; +enc_type(_, dgram) -> ?SOCKET_TYPE_DGRAM; +enc_type(_, raw) -> ?SOCKET_TYPE_RAW; +enc_type(_, seqpacket) -> ?SOCKET_TYPE_SEQPACKET; +enc_type(_, Type) -> throw({error, {invalid_type, Type}}). + +-spec enc_protocol(Type, Protocol) -> non_neg_integer() | + {raw, non_neg_integer()} when + Type :: type(), + Protocol :: protocol(). + +enc_protocol(dgram, ip) -> ?SOCKET_PROTOCOL_IP; +enc_protocol(stream, tcp) -> ?SOCKET_PROTOCOL_TCP; +enc_protocol(dgram, udp) -> ?SOCKET_PROTOCOL_UDP; +enc_protocol(seqpacket, sctp) -> ?SOCKET_PROTOCOL_SCTP; +enc_protocol(raw, icmp) -> ?SOCKET_PROTOCOL_ICMP; +enc_protocol(raw, igmp) -> ?SOCKET_PROTOCOL_IGMP; +enc_protocol(raw, {raw, P} = RAW) when is_integer(P) -> RAW; +enc_protocol(Type, Proto) -> + throw({error, {invalid_protocol, {Type, Proto}}}). + + +-spec enc_send_flags(Flags) -> non_neg_integer() when + Flags :: send_flags(). + +enc_send_flags(Flags) -> + EFlags = [{confirm, ?SOCKET_SEND_FLAG_CONFIRM}, + {dontroute, ?SOCKET_SEND_FLAG_DONTROUTE}, + {eor, ?SOCKET_SEND_FLAG_EOR}, + {more, ?SOCKET_SEND_FLAG_MORE}, + {nosignal, ?SOCKET_SEND_FLAG_NOSIGNAL}, + {oob, ?SOCKET_SEND_FLAG_OOB}], + enc_flags(Flags, EFlags). + +-spec enc_recv_flags(Flags) -> non_neg_integer() when + Flags :: recv_flags(). + +enc_recv_flags(Flags) -> + EFlags = [{cmsg_cloexec, ?SOCKET_RECV_FLAG_CMSG_CLOEXEC}, + {errqueue, ?SOCKET_RECV_FLAG_ERRQUEUE}, + {oob, ?SOCKET_RECV_FLAG_OOB}, + {peek, ?SOCKET_RECV_FLAG_PEEK}, + {trunc, ?SOCKET_RECV_FLAG_TRUNC}], + enc_flags(Flags, EFlags). + + +enc_flags([], _) -> + 0; +enc_flags(Flags, EFlags) -> + F = fun(Flag, Acc) -> + case lists:keysearch(Flag, 1, EFlags) of + {value, {Flag, EFlag}} -> + Acc bor (1 bsl EFlag); + false -> + throw({error, {unknown_flag, Flag}}) + end + end, + lists:foldl(F, 0, Flags). + + +%% +++ Encode setopt level +++ + +-spec enc_setopt_level(Level) -> {IsEncoded, EncodedLevel} when + Level :: sockopt_level(), + IsEncoded :: boolean(), + EncodedLevel :: integer(). + +enc_setopt_level(otp) -> + {true, ?SOCKET_OPT_LEVEL_OTP}; +enc_setopt_level(socket) -> + {true, ?SOCKET_OPT_LEVEL_SOCKET}; +enc_setopt_level(ip) -> + {true, ?SOCKET_OPT_LEVEL_IP}; +enc_setopt_level(ipv6) -> + {true, ?SOCKET_OPT_LEVEL_IPV6}; +enc_setopt_level(tcp) -> + {true, ?SOCKET_OPT_LEVEL_TCP}; +enc_setopt_level(udp) -> + {true, ?SOCKET_OPT_LEVEL_UDP}; +enc_setopt_level(sctp) -> + {true, ?SOCKET_OPT_LEVEL_SCTP}; +%% Any option that is of an plain level must be provided as a binary +%% already fully encoded! +enc_setopt_level(L) when is_integer(L) -> + {false, L}. + + +%% +++ Encode setopt key +++ + +%% We should ...really... do something with the domain, type and protocol args... +%% Also, any option (key) which has an integer level (plain) must also be provided +%% in a plain mode, that is, as an integer. +%% Also, not all options are available on all platforms. That is something we +%% don't check here, but in the nif-code. + +enc_setopt_key(Level, Opt, Domain, Type, Protocol) -> + enc_sockopt_key(Level, Opt, set, Domain, Type, Protocol). + + +%% +++ Encode setopt value +++ +%% +%% For the most part this function does *not* do an actual encode, +%% it simply validates the value type. But in some cases it will +%% encode the value into an more "manageable" type. +%% It also handles "aliases" (see linger). + +-dialyzer({nowarn_function, enc_setopt_value/6}). +-spec enc_setopt_value(otp, otp_socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (socket, socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (ip, ip_socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (ipv6, ipv6_socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (tcp, tcp_socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (udp, udp_socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (sctp, sctp_socket_option(), + Value, Domain, Type, Protocol) -> term() when + Value :: term(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Opt, + Value, Domain, Type, Protocol) -> term() when + Level :: integer(), + Opt :: integer(), + Value :: binary(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol(). + +enc_setopt_value(otp, debug, V, _, _, _) when is_boolean(V) -> + V; +enc_setopt_value(otp, iow, V, _, _, _) when is_boolean(V) -> + V; +enc_setopt_value(otp, controlling_process, V, _, _, _) when is_pid(V) -> + V; +enc_setopt_value(otp, rcvbuf, V, _, _, _) when (V =:= default) -> + 0; % This will cause the nif-code to choose the default value +enc_setopt_value(otp, rcvbuf, V, _, _, _) when is_integer(V) andalso (V > 0) -> + V; +%% N: Number of reads (when specifying length = 0) +%% V: Size of the "read" buffer +enc_setopt_value(otp, rcvbuf, {N, BufSz} = V, _, stream = _T, tcp = _P) + when (is_integer(N) andalso (N > 0)) andalso + (is_integer(BufSz) andalso (BufSz > 0)) -> + V; +enc_setopt_value(otp, rcvctrlbuf, V, _, _, _) when (V =:= default) -> + 0; +enc_setopt_value(otp, rcvctrlbuf, V, _, _, _) when is_integer(V) andalso (V > 0) -> + V; +enc_setopt_value(otp, sndctrlbuf, V, _, _, _) when (V =:= default) -> + 0; +enc_setopt_value(otp, sndctrlbuf, V, _, _, _) when is_integer(V) andalso (V > 0) -> + V; +enc_setopt_value(otp = L, Opt, V, _D, _T, _P) -> + not_supported({L, Opt, V}); + +enc_setopt_value(socket, bindtodevice, V, _D, _T, _P) when is_list(V) -> + V; +enc_setopt_value(socket, broadcast, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket, debug, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, dontroute, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket, keepalive, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket, linger, abort, D, T, P) -> + enc_setopt_value(socket, linger, {true, 0}, D, T, P); +enc_setopt_value(socket, linger, {OnOff, Secs} = V, _D, _T, _P) + when is_boolean(OnOff) andalso is_integer(Secs) andalso (Secs >= 0) -> + V; +enc_setopt_value(socket, oobinline, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket, peek_off, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, priority, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, rcvbuf, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, rcvlowat, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, rcvtimeo, #{sec := Sec, usec := USec} = V, _D, _T, _P) + when is_integer(Sec) andalso is_integer(USec) -> + V; +enc_setopt_value(socket, reuseaddr, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket, reuseport, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket, sndbuf, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, sndlowat, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(socket, sndtimeo, #{sec := Sec, usec := USec} = V, _D, _T, _P) + when is_integer(Sec) andalso is_integer(USec) -> + V; +enc_setopt_value(socket, timestamp, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(socket = L, Opt, V, _D, _T, _P) -> + not_supported({L, Opt, V}); + +enc_setopt_value(ip, add_membership, #{multiaddr := MA, + interface := IF} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + ((IF =:= any) orelse (is_tuple(IF) andalso (size(IF) =:= 4))) -> + V; +enc_setopt_value(ip, add_source_membership, #{multiaddr := MA, + interface := IF, + sourceaddr := SA} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + (is_tuple(IF) andalso (size(IF) =:= 4)) andalso + (is_tuple(SA) andalso (size(SA) =:= 4)) -> + V; +enc_setopt_value(ip, block_source, #{multiaddr := MA, + interface := IF, + sourceaddr := SA} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + (is_tuple(IF) andalso (size(IF) =:= 4)) andalso + (is_tuple(SA) andalso (size(SA) =:= 4)) -> + V; +enc_setopt_value(ip, drop_membership, #{multiaddr := MA, + interface := IF} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + ((IF =:= any) orelse (is_tuple(IF) andalso (size(IF) =:= 4))) -> + V; +enc_setopt_value(ip, drop_source_membership, #{multiaddr := MA, + interface := IF, + sourceaddr := SA} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + (is_tuple(IF) andalso (size(IF) =:= 4)) andalso + (is_tuple(SA) andalso (size(SA) =:= 4)) -> + V; +enc_setopt_value(ip, freebind, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(ip, hdrincl, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(ip, minttl, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(ip, msfilter, null = V, _D, _T, _P) -> + V; +enc_setopt_value(ip, msfilter, #{multiaddr := MA, + interface := IF, + fmode := FMode, + slist := SL} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + (is_tuple(IF) andalso (size(IF) =:= 4)) andalso + ((FMode =:= include) orelse (FMode =:= exclude)) andalso + is_list(SL) -> + ensure_ip_msfilter_slist(SL), + V; +enc_setopt_value(ip, mtu_discover, V, _D, _T, _P) + when (V =:= want) orelse + (V =:= dont) orelse + (V =:= do) orelse + (V =:= probe) orelse + is_integer(V) -> + V; +enc_setopt_value(ip, multicast_all, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, multicast_if, V, _D, _T, _P) + when (V =:= any) orelse (is_tuple(V) andalso (size(V) =:= 4)) -> + V; +enc_setopt_value(ip, multicast_loop, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, multicast_ttl, V, _D, _T, _P) + when is_integer(V) andalso (0 =< V) andalso (V =< 255) -> + V; +enc_setopt_value(ip, nodefrag, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, pktinfo, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recvdstaddr, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recverr, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recvif, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recvopts, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recvorigdstaddr, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recvtos, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, recvttl, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, retopts, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, router_alert, V, _D, _T, _P) + when is_integer(V) -> + V; +enc_setopt_value(ip, sendsrcaddr, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, tos, V, _D, _T, _P) + when (V =:= lowdelay) orelse + (V =:= throughput) orelse + (V =:= reliability) orelse + (V =:= mincost) orelse + is_integer(V) -> + V; +enc_setopt_value(ip, transparent, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ip, ttl, V, _D, _T, _P) + when is_integer(V) -> + V; +enc_setopt_value(ip, unblock_source, #{multiaddr := MA, + interface := IF, + sourceaddr := SA} = V, _D, _T, _P) + when (is_tuple(MA) andalso (size(MA) =:= 4)) andalso + (is_tuple(IF) andalso (size(IF) =:= 4)) andalso + (is_tuple(SA) andalso (size(SA) =:= 4)) -> + V; +enc_setopt_value(ip = L, Opt, V, _D, _T, _P) -> + not_supported({L, Opt, V}); + +enc_setopt_value(ipv6, addrform, inet = V, _D, _T, _P) -> + enc_domain(V); +enc_setopt_value(ipv6, add_membership, #{multiaddr := MA, + interface := IF} = V, _D, _T, _P) + when ((is_tuple(MA) andalso (size(MA) =:= 8)) andalso + (is_integer(IF) andalso (IF >= 0))) -> + V; +%% Is this obsolete? When get, the result is enoprotoopt and in the +%% header file it says 'obsolete'... +%% But there might be (old?) versions of linux where it still works... +enc_setopt_value(ipv6, authhdr, V, _D, T, _P) + when is_boolean(V) andalso ((T =:= dgram) orelse (T =:= raw)) -> + V; +enc_setopt_value(ipv6, dstopts, V, _D, T, _P) + when is_boolean(V) andalso ((T =:= dgram) orelse (T =:= raw)) -> + V; +enc_setopt_value(ipv6, drop_membership, #{multiaddr := MA, + interface := IF} = V, _D, _T, _P) + when ((is_tuple(MA) andalso (size(MA) =:= 8)) andalso + (is_integer(IF) andalso (IF >= 0))) -> + V; +enc_setopt_value(ipv6, flowinfo, V, _D, T, _P) + when is_boolean(V) andalso ((T =:= dgram) orelse (T =:= raw)) -> + V; +enc_setopt_value(ipv6, hoplimit, V, _D, T, _P) + when is_boolean(V) andalso ((T =:= dgram) orelse (T =:= raw)) -> + V; +enc_setopt_value(ipv6, hopopts, V, _D, T, _P) + when is_boolean(V) andalso ((T =:= dgram) orelse (T =:= raw)) -> + V; +enc_setopt_value(ipv6, mtu, V, _D, _T, _P) when is_integer(V) -> + V; +enc_setopt_value(ipv6, mtu_discover, V, _D, _T, _P) + when (V =:= want) orelse + (V =:= dont) orelse + (V =:= do) orelse + (V =:= probe) orelse + is_integer(V) -> + V; +enc_setopt_value(ipv6, multicast_hops, V, _D, _T, _P) + when (V =:= default) -> + -1; +enc_setopt_value(ipv6, multicast_hops, V, _D, _T, _P) + when is_integer(V) andalso (V >= 0) andalso (V =< 255) -> + V; +enc_setopt_value(ipv6, multicast_if, V, _D, _T, _P) + when is_integer(V) -> + V; +enc_setopt_value(ipv6, multicast_loop, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ipv6, recverr, V, _D, _T, _P) + when is_boolean(V) -> + V; +enc_setopt_value(ipv6, Opt, V, _D, _T, _P) + when ((Opt =:= recvpktinfo) orelse (Opt =:= pktinfo)) andalso + is_boolean(V) -> + V; +enc_setopt_value(ipv6, router_alert, V, _D, T, _P) + when is_integer(V) andalso (T =:= raw) -> + V; +enc_setopt_value(ipv6, rthdr, V, _D, T, _P) + when is_boolean(V) andalso ((T =:= dgram) orelse (T =:= raw)) -> + V; +enc_setopt_value(ipv6, unicast_hops, V, _D, _T, _P) + when (V =:= default) -> + -1; +enc_setopt_value(ipv6, unicast_hops, V, _D, _T, _P) + when is_integer(V) andalso (V >= 0) andalso (V =< 255) -> + V; +enc_setopt_value(ipv6, v6only, V, _D, _T, _P) when is_boolean(V) -> + V; +enc_setopt_value(ipv6 = L, Opt, V, _D, _T, _P) -> + not_supported({L, Opt, V}); + +enc_setopt_value(tcp, congestion, V, _D, T, P) + when is_list(V) andalso + (T =:= stream) andalso + (P =:= tcp) -> + V; +enc_setopt_value(tcp, maxseg, V, _D, T, P) + when is_integer(V) andalso + (T =:= stream) andalso + (P =:= tcp) -> + V; +enc_setopt_value(tcp, nodelay, V, _D, T, P) + when is_boolean(V) andalso + (T =:= stream) andalso + (P =:= tcp) -> + V; +enc_setopt_value(tcp = L, Opt, V, _D, _T, _P) -> + not_supported({L, Opt, V}); + +enc_setopt_value(udp, cork, V, _D, T, P) + when is_boolean(V) andalso (T =:= dgram) andalso (P =:= udp) -> + V; +enc_setopt_value(udp = L, Opt, _V, _D, _T, _P) -> + not_supported({L, Opt}); + +enc_setopt_value(sctp, associnfo, #{assoc_id := AssocId, + asocmaxrxt := MaxRxt, + num_peer_dests := NumPeerDests, + peer_rwnd := PeerRWND, + local_rwnd := LocalRWND, + cookie_life := CLife} = V, + _D, _T, P) + when is_integer(AssocId) andalso + is_integer(MaxRxt) andalso (MaxRxt >= 0) andalso + is_integer(NumPeerDests) andalso (NumPeerDests >= 0) andalso + is_integer(PeerRWND) andalso (PeerRWND >= 0) andalso + is_integer(LocalRWND) andalso (LocalRWND >= 0) andalso + is_integer(CLife) andalso (CLife >= 0) andalso + (P =:= sctp) -> + V; +enc_setopt_value(sctp, autoclose, V, _D, _T, P) + when is_integer(V) andalso (V >= 0) andalso (P =:= sctp) -> + V; +enc_setopt_value(sctp, disable_fragments, V, _D, _T, P) + when is_boolean(V) andalso (P =:= sctp) -> + V; +enc_setopt_value(sctp, events, #{data_in := DataIn, + association := Assoc, + address := Addr, + send_failure := SndFailure, + peer_error := PeerError, + shutdown := Shutdown, + partial_delivery := PartialDelivery, + adaptation_layer := AdaptLayer, + authentication := Auth, + sender_dry := SndDry} = V, _D, _T, P) + when is_boolean(DataIn) andalso + is_boolean(Assoc) andalso + is_boolean(Addr) andalso + is_boolean(SndFailure) andalso + is_boolean(PeerError) andalso + is_boolean(Shutdown) andalso + is_boolean(PartialDelivery) andalso + is_boolean(AdaptLayer) andalso + is_boolean(Auth) andalso + is_boolean(SndDry) andalso + (P =:= sctp) -> + V; +enc_setopt_value(sctp, initmsg, #{num_outstreams := NumOut, + max_instreams := MaxIn, + max_attempts := MaxAttempts, + max_init_timeo := MaxInitTO} = V, + _D, _T, P) + when is_integer(NumOut) andalso (NumOut >= 0) andalso + is_integer(MaxIn) andalso (MaxIn >= 0) andalso + is_integer(MaxAttempts) andalso (MaxAttempts >= 0) andalso + is_integer(MaxInitTO) andalso (MaxInitTO >= 0) andalso + (P =:= sctp) -> + V; +enc_setopt_value(sctp, maxseg, V, _D, _T, P) + when is_integer(V) andalso (V >= 0) andalso (P =:= sctp) -> + V; +enc_setopt_value(sctp, nodelay, V, _D, _T, P) + when is_boolean(V) andalso (P =:= sctp) -> + V; +enc_setopt_value(sctp, rtoinfo, #{assoc_id := AssocId, + initial := Init, + max := Max, + min := Min} = V, + _D, _T, P) + when is_integer(AssocId) andalso + is_integer(Init) andalso (Init >= 0) andalso + is_integer(Max) andalso (Max >= 0) andalso + is_integer(Min) andalso (Min >= 0) andalso + (P =:= sctp) -> + V; +enc_setopt_value(sctp = L, Opt, V, _D, _T, _P) -> + not_supported({L, Opt, V}); + +%% enc_setopt_value(raw = L, Opt, _V, _D, _T, _P) -> +%% not_supported({L, Opt}); + +%% Is this correct? What about getopt? +enc_setopt_value(L, Opt, V, _, _, _) + when is_integer(L) andalso is_integer(Opt) andalso is_binary(V) -> + V. + + + + +%% +++ Encode getopt value +++ + +enc_getopt_level(Level) -> + enc_setopt_level(Level). + + +%% +++ Encode getopt key +++ + +enc_getopt_key(Level, Opt, Domain, Type, Protocol) -> + enc_sockopt_key(Level, Opt, get, Domain, Type, Protocol). + + +%% +++ Decode getopt value +++ +%% +%% For the most part, we simply let the value pass through, but for some +%% values we may need to do an actual decode. +%% + +%% Let the user deal with this for now... +dec_getopt_value(_L, _Opt, V, _D, _T, _P) -> + V. + + + +%% +++ Encode socket option key +++ + +%% Most options are usable both for set and get, but some are +%% are only available for e.g. get. +-spec enc_sockopt_key(Level, Opt, + Direction, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: otp, + Direction :: set | get, + Opt :: otp_socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: socket, + Direction :: set | get, + Opt :: socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: ip, + Direction :: set | get, + Opt :: ip_socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: ipv6, + Direction :: set | get, + Opt :: ipv6_socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: tcp, + Direction :: set | get, + Opt :: tcp_socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: udp, + Direction :: set | get, + Opt :: udp_socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: sctp, + Direction :: set | get, + Opt :: sctp_socket_option(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: integer(), + Direction :: set, + Opt :: integer(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol() + ; (Level, Direction, Opt, + Domain, Type, Protocol) -> non_neg_integer() when + Level :: integer(), + Direction :: get, + Opt :: {NativeOpt, ValueSize}, + NativeOpt :: integer(), + ValueSize :: non_neg_integer(), + Domain :: domain(), + Type :: type(), + Protocol :: protocol(). + + +%% +++ OTP socket options +++ +enc_sockopt_key(otp, debug, _, _, _, _) -> + ?SOCKET_OPT_OTP_DEBUG; +enc_sockopt_key(otp, iow, _, _, _, _) -> + ?SOCKET_OPT_OTP_IOW; +enc_sockopt_key(otp, controlling_process, _, _, _, _) -> + ?SOCKET_OPT_OTP_CTRL_PROC; +enc_sockopt_key(otp, rcvbuf, _, _, _, _) -> + ?SOCKET_OPT_OTP_RCVBUF; +enc_sockopt_key(otp, rcvctrlbuf, _, _, _, _) -> + ?SOCKET_OPT_OTP_RCVCTRLBUF; +enc_sockopt_key(otp, sndctrlbuf, _, _, _, _) -> + ?SOCKET_OPT_OTP_SNDCTRLBUF; +enc_sockopt_key(otp, fd, get = _Dir, _, _, _) -> + ?SOCKET_OPT_OTP_FD; +enc_sockopt_key(otp = L, Opt, _, _, _, _) -> + not_supported({L, Opt}); + +%% +++ SOCKET socket options +++ +enc_sockopt_key(socket = _L, acceptconn = _Opt, get = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_ACCEPTCONN; +enc_sockopt_key(socket = L, acceptfilter = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +%% Before linux 3.8, this socket option could be set. +%% Maximum size of buffer for name: IFNAMSZIZ +%% So, we let the implementation decide. +enc_sockopt_key(socket = _L, bindtodevice = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_BINDTODEVICE; +enc_sockopt_key(socket, broadcast = _Opt, _Dir, _D, dgram = _T, _P) -> + ?SOCKET_OPT_SOCK_BROADCAST; +enc_sockopt_key(socket = L, busy_poll = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(socket = _L, debug = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_DEBUG; +enc_sockopt_key(socket, domain = _Opt, get = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_DOMAIN; +enc_sockopt_key(socket, dontroute = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_DONTROUTE; +enc_sockopt_key(socket = L, error = Opt, get = _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +%% This is only for connection-oriented sockets, but who are those? +%% Type = stream or Protocol = tcp? +%% For now, we just let is pass and it will fail later if not ok... +enc_sockopt_key(socket, keepalive = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_KEEPALIVE; +enc_sockopt_key(socket, linger = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_LINGER; +enc_sockopt_key(socket = L, mark = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(socket = _L, oobinline = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_OOBINLINE; +enc_sockopt_key(socket = L, passcred = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(socket = _L, peek_off = _Opt, _Dir, local = _D, _T, _P) -> + ?SOCKET_OPT_SOCK_PEEK_OFF; +enc_sockopt_key(socket = L, peekcred = Opt, get = _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(socket, priority = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_PRIORITY; +enc_sockopt_key(socket, protocol = _Opt, get = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_PROTOCOL; +enc_sockopt_key(socket, rcvbuf = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_RCVBUF; +enc_sockopt_key(socket = L, rcvbufforce = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +%% May not work on linux. +enc_sockopt_key(socket = _L, rcvlowat = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_RCVLOWAT; +enc_sockopt_key(socket = _L, rcvtimeo = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_RCVTIMEO; +enc_sockopt_key(socket = _L, reuseaddr = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_REUSEADDR; +enc_sockopt_key(socket = _L, reuseport = _Opt, _Dir, D, _T, _P) + when ((D =:= inet) orelse (D =:= inet6)) -> + ?SOCKET_OPT_SOCK_REUSEPORT; +enc_sockopt_key(socket = L, rxq_ovfl = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(socket = L, setfib = Opt, set = _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(socket = _L, sndbuf = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_SNDBUF; +enc_sockopt_key(socket = L, sndbufforce = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +%% Not changeable on linux. +enc_sockopt_key(socket = _L, sndlowat = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_SNDLOWAT; +enc_sockopt_key(socket = _L, sndtimeo = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_SNDTIMEO; +enc_sockopt_key(socket = _L, timestamp = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_TIMESTAMP; +enc_sockopt_key(socket = _L, type = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SOCK_TYPE; +enc_sockopt_key(socket = L, UnknownOpt, _Dir, _D, _T, _P) -> + unknown({L, UnknownOpt}); + +%% +++ IP socket options +++ +enc_sockopt_key(ip = _L, add_membership = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_ADD_MEMBERSHIP; +enc_sockopt_key(ip = _L, add_source_membership = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_ADD_SOURCE_MEMBERSHIP; +enc_sockopt_key(ip = _L, block_source = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_BLOCK_SOURCE; +%% FreeBSD only? +%% Only respected on udp and raw ip (unless the hdrincl option has been set). +enc_sockopt_key(ip = L, dontfrag = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ip = _L, drop_membership = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_DROP_MEMBERSHIP; +enc_sockopt_key(ip = _L, drop_source_membership = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_DROP_SOURCE_MEMBERSHIP; +%% Linux only? +enc_sockopt_key(ip = _L, freebind = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_FREEBIND; +enc_sockopt_key(ip = _L, hdrincl = _Opt, _Dir, _D, raw = _T, _P) -> + ?SOCKET_OPT_IP_HDRINCL; +enc_sockopt_key(ip = _L, minttl = _Opt, _Dir, _D, raw = _T, _P) -> + ?SOCKET_OPT_IP_MINTTL; +enc_sockopt_key(ip = _L, msfilter = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MSFILTER; +enc_sockopt_key(ip = _L, mtu = _Opt, get = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MTU; +enc_sockopt_key(ip = _L, mtu_discover = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MTU_DISCOVER; +enc_sockopt_key(ip = _L, multicast_all = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MULTICAST_ALL; +enc_sockopt_key(ip = _L, multicast_if = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MULTICAST_IF; +enc_sockopt_key(ip = _L, multicast_loop = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MULTICAST_LOOP; +enc_sockopt_key(ip = _L, multicast_ttl = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_MULTICAST_TTL; +enc_sockopt_key(ip = _L, nodefrag = _Opt, _Dir, _D, raw = _T, _P) -> + ?SOCKET_OPT_IP_NODEFRAG; +enc_sockopt_key(ip = L, options = Opt, _Dir, _D, _T, _P) -> + not_supported({Opt, L}); +enc_sockopt_key(ip = _L, pktinfo = _Opt, _Dir, _D, dgram = _T, _P) -> + ?SOCKET_OPT_IP_PKTINFO; +enc_sockopt_key(ip = _L, recvdstaddr = _Opt, _Dir, _D, T, _P) when (T =:= dgram) -> + ?SOCKET_OPT_IP_RECVDSTADDR; +enc_sockopt_key(ip = _L, recverr = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_RECVERR; +enc_sockopt_key(ip = _L, recvif = _Opt, _Dir, _D, T, _P) + when (T =:= dgram) orelse (T =:= raw) -> + ?SOCKET_OPT_IP_RECVIF; +enc_sockopt_key(ip = _L, recvopts = _Opt, _Dir, _D, T, _P) when (T =/= stream) -> + ?SOCKET_OPT_IP_RECVOPTS; +enc_sockopt_key(ip = _L, recvorigdstaddr = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_RECVORIGDSTADDR; +enc_sockopt_key(ip, recvtos = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_RECVTOS; +enc_sockopt_key(ip = _L, recvttl = _Opt, _Dir, _D, T, _P) when (T =/= stream) -> + ?SOCKET_OPT_IP_RECVTTL; +enc_sockopt_key(ip = _L, retopts = _Opt, _Dir, _D, T, _P) when (T =/= stream) -> + ?SOCKET_OPT_IP_RETOPTS; +enc_sockopt_key(ip, router_alert = _Opt, _Dir, _D, raw = _T, _P) -> + ?SOCKET_OPT_IP_ROUTER_ALERT; +enc_sockopt_key(ip, sendsrcaddr = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_SENDSRCADDR; +%% On FreeBSD it specifies that this option is only valid +%% for stream, dgram and "some" raw sockets... +%% No such condition on linux (in the man page)... +enc_sockopt_key(ip, tos = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_TOS; +enc_sockopt_key(ip = _L, transparent = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_TRANSPARENT; +enc_sockopt_key(ip, ttl = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_TTL; +enc_sockopt_key(ip = _L, unblock_source = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IP_UNBLOCK_SOURCE; +enc_sockopt_key(ip = L, UnknownOpt, _Dir, _D, _T, _P) -> + unknown({L, UnknownOpt}); + +%% IPv6 socket options +enc_sockopt_key(ipv6 = _L, addrform = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_ADDRFORM; +enc_sockopt_key(ipv6, add_membership = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_ADD_MEMBERSHIP; +enc_sockopt_key(ipv6 = _L, authhdr = _Opt, _Dir, _D, T, _P) + when ((T =:= dgram) orelse (T =:= raw)) -> + ?SOCKET_OPT_IPV6_AUTHHDR; +enc_sockopt_key(ipv6 = L, auth_level = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = L, checksum = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6, drop_membership = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_DROP_MEMBERSHIP; +enc_sockopt_key(ipv6 = _L, dstopts = _Opt, _Dir, _D, T, _P) + when (T =:= dgram) orelse (T =:= raw) -> + ?SOCKET_OPT_IPV6_DSTOPTS; +enc_sockopt_key(ipv6 = L, esp_trans_level = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = L, esp_network_level = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = _L, flowinfo = _Opt, _Dir, _D, T, _P) + when (T =:= dgram) orelse (T =:= raw) -> + ?SOCKET_OPT_IPV6_DSTOPTS; +enc_sockopt_key(ipv6, hoplimit = _Opt, _Dir, _D, T, _P) + when (T =:= dgram) orelse (T =:= raw) -> + ?SOCKET_OPT_IPV6_HOPLIMIT; +enc_sockopt_key(ipv6 = _L, hopopts = _Opt, _Dir, _D, T, _P) + when ((T =:= dgram) orelse (T =:= raw)) -> + ?SOCKET_OPT_IPV6_HOPOPTS; +enc_sockopt_key(ipv6 = L, ipcomp_level = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = L, join_group = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = L, leave_group = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = _L, mtu = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_MTU; +enc_sockopt_key(ipv6 = _L, mtu_discover = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_MTU_DISCOVER; +enc_sockopt_key(ipv6 = _L, multicast_hops = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_MULTICAST_HOPS; +enc_sockopt_key(ipv6 = _L, multicast_if = _Opt, _Dir, _D, T, _P) + when (T =:= dgram) orelse (T =:= raw) -> + ?SOCKET_OPT_IPV6_MULTICAST_IF; +enc_sockopt_key(ipv6 = _L, multicast_loop = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_MULTICAST_LOOP; +enc_sockopt_key(ipv6 = L, portrange = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = L, pktoptions = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = _L, recverr = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_RECVERR; +enc_sockopt_key(ipv6 = _L, Opt, _Dir, _D, T, _P) + when ((Opt =:= recvpktinfo) orelse (Opt =:= pktinfo)) andalso + ((T =:= dgram) orelse (T =:= raw)) -> + ?SOCKET_OPT_IPV6_RECVPKTINFO; +enc_sockopt_key(ipv6 = L, recvtclass = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = _L, router_alert = _Opt, _Dir, _D, T, _P) when (T =:= raw) -> + ?SOCKET_OPT_IPV6_ROUTER_ALERT; +enc_sockopt_key(ipv6 = _L, rthdr = _Opt, _Dir, _D, T, _P) + when ((T =:= dgram) orelse (T =:= raw)) -> + ?SOCKET_OPT_IPV6_RTHDR; +enc_sockopt_key(ipv6 = L, tclass = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = _L, unicast_hops = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_UNICAST_HOPS; +enc_sockopt_key(ipv6 = L, use_min_mtu = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(ipv6 = _L, v6only = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_IPV6_V6ONLY; +enc_sockopt_key(ipv6 = L, UnknownOpt, _Dir, _D, _T, _P) -> + unknown({L, UnknownOpt}); + +%% TCP socket options +%% There are other options that would be useful; info, +%% but they are difficult to get portable... +enc_sockopt_key(tcp, congestion = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_TCP_CONGESTION; +enc_sockopt_key(tcp = L, cork = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, keepidle = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, keepintvl = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, keepcnt = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp, maxseg = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_TCP_MAXSEG; +enc_sockopt_key(tcp = L, md5sig = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp, nodelay = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_TCP_NODELAY; +enc_sockopt_key(tcp = L, noopt = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, nopush = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, syncnt = Opt, _Dir, _D, _T, _P) -> % Only set? 1..255 + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, user_timeout = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(tcp = L, UnknownOpt, _Dir, _D, _T, _P) -> + unknown({L, UnknownOpt}); + +%% UDP socket options +enc_sockopt_key(udp, cork = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_UDP_CORK; +enc_sockopt_key(udp = L, UnknownOpt, _Dir, _D, _T, _P) -> + unknown({L, UnknownOpt}); + +%% SCTP socket options +enc_sockopt_key(sctp = L, adaption_layer = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = _L, associnfo = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_ASSOCINFO; +enc_sockopt_key(sctp = L, auth_active_key = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, auth_asconf = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, auth_chunk = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, auth_key = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, auth_delete_key = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp, autoclose = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_AUTOCLOSE; +enc_sockopt_key(sctp = L, context = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, default_send_params = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, delayed_ack_time = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = _L, disable_fragments = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_DISABLE_FRAGMENTS; +enc_sockopt_key(sctp = L, hmac_ident = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = _L, events = _Opt, set = _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_EVENTS; +enc_sockopt_key(sctp = L, explicit_eor = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, fragment_interleave = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, get_peer_addr_info = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = _L, initmsg = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_INITMSG; +enc_sockopt_key(sctp = L, i_want_mapped_v4_addr = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, local_auth_chunks = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = _L, maxseg = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_MAXSEG; +enc_sockopt_key(sctp = L, maxburst = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp, nodelay = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_NODELAY; +enc_sockopt_key(sctp = L, partial_delivery_point = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, peer_addr_params = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, peer_auth_chunks = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, primary_addr = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, reset_streams = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = _L, rtoinfo = _Opt, _Dir, _D, _T, _P) -> + ?SOCKET_OPT_SCTP_RTOINFO; +enc_sockopt_key(sctp = L, set_peer_primary_addr = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, status = Opt, get = _Dir, _D, _T, _P) -> + not_supported({L, Opt}); % ?SOCKET_OPT_SCTP_RTOINFO; +enc_sockopt_key(sctp = L, use_exp_recvinfo = Opt, _Dir, _D, _T, _P) -> + not_supported({L, Opt}); +enc_sockopt_key(sctp = L, UnknownOpt, _Dir, _D, _T, _P) -> + unknown({L, UnknownOpt}); + +%% +++ "Native" socket options +++ +enc_sockopt_key(Level, Opt, set = _Dir, _D, _T, _P) + when is_integer(Level) andalso is_integer(Opt) -> + Opt; +enc_sockopt_key(Level, {NativeOpt, ValueSize} = Opt, get = _Dir, _D, _T, _P) + when is_integer(Level) andalso + is_integer(NativeOpt) andalso + ((is_integer(ValueSize) andalso (ValueSize >= 0)) orelse + ((ValueSize =:= int) orelse (ValueSize =:= bool))) -> + Opt; + +enc_sockopt_key(Level, Opt, _Dir, _Domain, _Type, _Protocol) -> + unknown({Level, Opt}). + + + +enc_shutdown_how(read) -> + ?SOCKET_SHUTDOWN_HOW_READ; +enc_shutdown_how(write) -> + ?SOCKET_SHUTDOWN_HOW_WRITE; +enc_shutdown_how(read_write) -> + ?SOCKET_SHUTDOWN_HOW_READ_WRITE. + + + + +%% =========================================================================== +%% +%% Misc utility functions +%% +%% =========================================================================== + +-dialyzer({nowarn_function, ensure_ip_msfilter_slist/1}). +ensure_ip_msfilter_slist(SL) -> + EnsureSA = fun(SA) when is_tuple(SA) andalso (size(SA) =:= 4) -> ok; + (_) -> einval() + end, + lists:foreach(EnsureSA, SL). + + +ensure_sockaddr(#{family := inet} = SockAddr) -> + maps:merge(?SOCKADDR_IN4_DEFAULTS, SockAddr); +ensure_sockaddr(#{family := inet6} = SockAddr) -> + maps:merge(?SOCKADDR_IN6_DEFAULTS, SockAddr); +ensure_sockaddr(#{family := local, path := Path} = SockAddr) + when is_list(Path) andalso + (length(Path) > 0) andalso + (length(Path) =< 255) -> + BinPath = unicode:characters_to_binary(Path, file:native_name_encoding()), + ensure_sockaddr(SockAddr#{path => BinPath}); +ensure_sockaddr(#{family := local, path := Path} = SockAddr) + when is_binary(Path) andalso + (byte_size(Path) > 0) andalso + (byte_size(Path) =< 255) -> + SockAddr; +ensure_sockaddr(_SockAddr) -> + einval(). + + + +cancel(SockRef, Op, OpRef) -> + case nif_cancel(SockRef, Op, OpRef) of + %% The select has already completed + {error, select_sent} -> + flush_select_msgs(SockRef, OpRef); + Other -> + Other + end. + +flush_select_msgs(SockRef, Ref) -> + receive + {select, SockRef, Ref, _} -> + flush_select_msgs(SockRef, Ref) + after 0 -> + ok + end. + + +%% formated_timestamp() -> +%% format_timestamp(os:timestamp()). + +%% format_timestamp(Now) -> +%% N2T = fun(N) -> calendar:now_to_local_time(N) end, +%% format_timestamp(Now, N2T, true). + +%% format_timestamp({_N1, _N2, N3} = N, N2T, true) -> +%% FormatExtra = ".~.2.0w", +%% ArgsExtra = [N3 div 10000], +%% format_timestamp(N, N2T, FormatExtra, ArgsExtra); +%% format_timestamp({_N1, _N2, _N3} = N, N2T, false) -> +%% FormatExtra = "", +%% ArgsExtra = [], +%% format_timestamp(N, N2T, FormatExtra, ArgsExtra). + +%% format_timestamp(N, N2T, FormatExtra, ArgsExtra) -> +%% {Date, Time} = N2T(N), +%% {YYYY,MM,DD} = Date, +%% {Hour,Min,Sec} = Time, +%% FormatDate = +%% io_lib:format("~.4w-~.2.0w-~.2.0w ~.2.0w:~.2.0w:~.2.0w" ++ FormatExtra, +%% [YYYY, MM, DD, Hour, Min, Sec] ++ ArgsExtra), +%% lists:flatten(FormatDate). + + +%% A timestamp in ms + +timestamp(infinity) -> + undefined; +timestamp(_) -> + timestamp(). + +timestamp() -> + {A,B,C} = os:timestamp(), + A*1000000000+B*1000+(C div 1000). + +next_timeout(_, infinity = Timeout) -> + Timeout; +next_timeout(TS, Timeout) -> + NewTimeout = Timeout - tdiff(TS, timestamp()), + if + (NewTimeout > 0) -> + NewTimeout; + true -> + 0 + end. + +tdiff(T1, T2) -> + T2 - T1. + + + +%% p(F) -> +%% p(F, []). + +%% p(F, A) -> +%% p(get(sname), F, A). + +%% p(undefined, F, A) -> +%% p("***", F, A); +%% p(SName, F, A) -> +%% io:format(user,"[~s,~p] " ++ F ++ "~n", [SName, self()|A]), +%% io:format("[~s,~p] " ++ F ++ "~n", [SName, self()|A]). + + + +%% =========================================================================== +%% +%% Error functions +%% +%% =========================================================================== + +-spec not_supported(What) -> no_return() when + What :: term(). + +not_supported(What) -> + error({not_supported, What}). + +-spec unknown(What) -> no_return() when + What :: term(). + +unknown(What) -> + error({unknown, What}). + +-spec einval() -> no_return(). + +einval() -> + error(einval). + +-spec error(Reason) -> no_return() when + Reason :: term(). + +error(Reason) -> + throw({error, Reason}). + + +%% =========================================================================== +%% +%% Below follows the actual NIF-functions. +%% +%% =========================================================================== + +nif_info() -> + erlang:nif_error(undef). + +nif_supports(_Key) -> + erlang:nif_error(undef). + +nif_open(_Domain, _Type, _Protocol, _Extra) -> + erlang:nif_error(undef). + +nif_bind(_SRef, _SockAddr) -> + erlang:nif_error(undef). + +nif_bind(_SRef, _SockAddrs, _Action) -> + erlang:nif_error(undef). + +nif_connect(_SRef, _SockAddr) -> + erlang:nif_error(undef). + +nif_finalize_connection(_SRef) -> + erlang:nif_error(undef). + +nif_listen(_SRef, _Backlog) -> + erlang:nif_error(undef). + +nif_accept(_SRef, _Ref) -> + erlang:nif_error(undef). + +nif_send(_SockRef, _SendRef, _Data, _Flags) -> + erlang:nif_error(undef). + +nif_sendto(_SRef, _SendRef, _Data, _Dest, _Flags) -> + erlang:nif_error(undef). + +nif_sendmsg(_SRef, _SendRef, _MsgHdr, _Flags) -> + erlang:nif_error(undef). + +nif_recv(_SRef, _RecvRef, _Length, _Flags) -> + erlang:nif_error(undef). + +nif_recvfrom(_SRef, _RecvRef, _Length, _Flags) -> + erlang:nif_error(undef). + +nif_recvmsg(_SRef, _RecvRef, _BufSz, _CtrlSz, _Flags) -> + erlang:nif_error(undef). + +nif_cancel(_SRef, _Op, _Ref) -> + erlang:nif_error(undef). + +nif_close(_SRef) -> + erlang:nif_error(undef). + +nif_shutdown(_SRef, _How) -> + erlang:nif_error(undef). + +nif_finalize_close(_SRef) -> + erlang:nif_error(undef). + +nif_setopt(_Ref, _IsEnc, _Lev, _Key, _Val) -> + erlang:nif_error(undef). + +nif_getopt(_Ref, _IsEnc, _Lev, _Key) -> + erlang:nif_error(undef). + +nif_sockname(_Ref) -> + erlang:nif_error(undef). + +nif_peername(_Ref) -> + erlang:nif_error(undef). + |