mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 01:52:46 +00:00
cf5c6d724d
* add miekg/dns dependency * set/validate accountDomain
302 lines
7.5 KiB
Go
302 lines
7.5 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ipv6
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import (
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"net"
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"golang.org/x/net/bpf"
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)
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// MulticastHopLimit returns the hop limit field value for outgoing
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// multicast packets.
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func (c *dgramOpt) MulticastHopLimit() (int, error) {
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if !c.ok() {
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return 0, errInvalidConn
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}
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so, ok := sockOpts[ssoMulticastHopLimit]
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if !ok {
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return 0, errNotImplemented
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}
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return so.GetInt(c.Conn)
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}
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// SetMulticastHopLimit sets the hop limit field value for future
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// outgoing multicast packets.
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func (c *dgramOpt) SetMulticastHopLimit(hoplim int) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoMulticastHopLimit]
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if !ok {
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return errNotImplemented
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}
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return so.SetInt(c.Conn, hoplim)
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}
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// MulticastInterface returns the default interface for multicast
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// packet transmissions.
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func (c *dgramOpt) MulticastInterface() (*net.Interface, error) {
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if !c.ok() {
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return nil, errInvalidConn
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}
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so, ok := sockOpts[ssoMulticastInterface]
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if !ok {
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return nil, errNotImplemented
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}
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return so.getMulticastInterface(c.Conn)
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}
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// SetMulticastInterface sets the default interface for future
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// multicast packet transmissions.
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func (c *dgramOpt) SetMulticastInterface(ifi *net.Interface) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoMulticastInterface]
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if !ok {
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return errNotImplemented
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}
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return so.setMulticastInterface(c.Conn, ifi)
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}
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// MulticastLoopback reports whether transmitted multicast packets
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// should be copied and send back to the originator.
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func (c *dgramOpt) MulticastLoopback() (bool, error) {
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if !c.ok() {
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return false, errInvalidConn
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}
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so, ok := sockOpts[ssoMulticastLoopback]
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if !ok {
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return false, errNotImplemented
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}
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on, err := so.GetInt(c.Conn)
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if err != nil {
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return false, err
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}
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return on == 1, nil
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}
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// SetMulticastLoopback sets whether transmitted multicast packets
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// should be copied and send back to the originator.
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func (c *dgramOpt) SetMulticastLoopback(on bool) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoMulticastLoopback]
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if !ok {
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return errNotImplemented
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}
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return so.SetInt(c.Conn, boolint(on))
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}
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// JoinGroup joins the group address group on the interface ifi.
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// By default all sources that can cast data to group are accepted.
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// It's possible to mute and unmute data transmission from a specific
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// source by using ExcludeSourceSpecificGroup and
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// IncludeSourceSpecificGroup.
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// JoinGroup uses the system assigned multicast interface when ifi is
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// nil, although this is not recommended because the assignment
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// depends on platforms and sometimes it might require routing
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// configuration.
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func (c *dgramOpt) JoinGroup(ifi *net.Interface, group net.Addr) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoJoinGroup]
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if !ok {
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return errNotImplemented
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}
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grp := netAddrToIP16(group)
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if grp == nil {
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return errMissingAddress
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}
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return so.setGroup(c.Conn, ifi, grp)
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}
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// LeaveGroup leaves the group address group on the interface ifi
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// regardless of whether the group is any-source group or
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// source-specific group.
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func (c *dgramOpt) LeaveGroup(ifi *net.Interface, group net.Addr) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoLeaveGroup]
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if !ok {
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return errNotImplemented
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}
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grp := netAddrToIP16(group)
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if grp == nil {
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return errMissingAddress
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}
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return so.setGroup(c.Conn, ifi, grp)
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}
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// JoinSourceSpecificGroup joins the source-specific group comprising
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// group and source on the interface ifi.
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// JoinSourceSpecificGroup uses the system assigned multicast
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// interface when ifi is nil, although this is not recommended because
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// the assignment depends on platforms and sometimes it might require
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// routing configuration.
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func (c *dgramOpt) JoinSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoJoinSourceGroup]
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if !ok {
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return errNotImplemented
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}
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grp := netAddrToIP16(group)
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if grp == nil {
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return errMissingAddress
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}
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src := netAddrToIP16(source)
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if src == nil {
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return errMissingAddress
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}
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return so.setSourceGroup(c.Conn, ifi, grp, src)
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}
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// LeaveSourceSpecificGroup leaves the source-specific group on the
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// interface ifi.
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func (c *dgramOpt) LeaveSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoLeaveSourceGroup]
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if !ok {
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return errNotImplemented
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}
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grp := netAddrToIP16(group)
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if grp == nil {
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return errMissingAddress
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}
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src := netAddrToIP16(source)
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if src == nil {
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return errMissingAddress
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}
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return so.setSourceGroup(c.Conn, ifi, grp, src)
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}
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// ExcludeSourceSpecificGroup excludes the source-specific group from
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// the already joined any-source groups by JoinGroup on the interface
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// ifi.
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func (c *dgramOpt) ExcludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoBlockSourceGroup]
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if !ok {
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return errNotImplemented
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}
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grp := netAddrToIP16(group)
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if grp == nil {
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return errMissingAddress
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}
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src := netAddrToIP16(source)
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if src == nil {
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return errMissingAddress
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}
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return so.setSourceGroup(c.Conn, ifi, grp, src)
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}
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// IncludeSourceSpecificGroup includes the excluded source-specific
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// group by ExcludeSourceSpecificGroup again on the interface ifi.
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func (c *dgramOpt) IncludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoUnblockSourceGroup]
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if !ok {
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return errNotImplemented
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}
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grp := netAddrToIP16(group)
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if grp == nil {
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return errMissingAddress
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}
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src := netAddrToIP16(source)
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if src == nil {
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return errMissingAddress
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}
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return so.setSourceGroup(c.Conn, ifi, grp, src)
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}
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// Checksum reports whether the kernel will compute, store or verify a
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// checksum for both incoming and outgoing packets. If on is true, it
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// returns an offset in bytes into the data of where the checksum
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// field is located.
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func (c *dgramOpt) Checksum() (on bool, offset int, err error) {
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if !c.ok() {
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return false, 0, errInvalidConn
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}
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so, ok := sockOpts[ssoChecksum]
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if !ok {
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return false, 0, errNotImplemented
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}
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offset, err = so.GetInt(c.Conn)
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if err != nil {
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return false, 0, err
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}
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if offset < 0 {
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return false, 0, nil
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}
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return true, offset, nil
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}
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// SetChecksum enables the kernel checksum processing. If on is ture,
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// the offset should be an offset in bytes into the data of where the
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// checksum field is located.
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func (c *dgramOpt) SetChecksum(on bool, offset int) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoChecksum]
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if !ok {
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return errNotImplemented
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}
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if !on {
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offset = -1
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}
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return so.SetInt(c.Conn, offset)
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}
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// ICMPFilter returns an ICMP filter.
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func (c *dgramOpt) ICMPFilter() (*ICMPFilter, error) {
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if !c.ok() {
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return nil, errInvalidConn
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}
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so, ok := sockOpts[ssoICMPFilter]
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if !ok {
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return nil, errNotImplemented
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}
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return so.getICMPFilter(c.Conn)
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}
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// SetICMPFilter deploys the ICMP filter.
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func (c *dgramOpt) SetICMPFilter(f *ICMPFilter) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoICMPFilter]
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if !ok {
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return errNotImplemented
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}
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return so.setICMPFilter(c.Conn, f)
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}
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// SetBPF attaches a BPF program to the connection.
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//
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// Only supported on Linux.
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func (c *dgramOpt) SetBPF(filter []bpf.RawInstruction) error {
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if !c.ok() {
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return errInvalidConn
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}
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so, ok := sockOpts[ssoAttachFilter]
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if !ok {
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return errNotImplemented
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}
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return so.setBPF(c.Conn, filter)
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}
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