60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
// Copyright 2012 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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// +build darwin dragonfly freebsd linux netbsd openbsd windows
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package ipv4
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import "syscall"
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// TOS returns the type-of-service field value for outgoing packets.
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func (c *genericOpt) TOS() (int, error) {
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if !c.ok() {
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return 0, syscall.EINVAL
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}
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fd, err := c.sysfd()
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if err != nil {
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return 0, err
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}
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return getInt(fd, &sockOpts[ssoTOS])
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}
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// SetTOS sets the type-of-service field value for future outgoing
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// packets.
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func (c *genericOpt) SetTOS(tos int) error {
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if !c.ok() {
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return syscall.EINVAL
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}
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fd, err := c.sysfd()
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if err != nil {
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return err
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}
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return setInt(fd, &sockOpts[ssoTOS], tos)
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}
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// TTL returns the time-to-live field value for outgoing packets.
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func (c *genericOpt) TTL() (int, error) {
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if !c.ok() {
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return 0, syscall.EINVAL
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}
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fd, err := c.sysfd()
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if err != nil {
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return 0, err
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}
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return getInt(fd, &sockOpts[ssoTTL])
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}
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// SetTTL sets the time-to-live field value for future outgoing
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// packets.
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func (c *genericOpt) SetTTL(ttl int) error {
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if !c.ok() {
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return syscall.EINVAL
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}
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fd, err := c.sysfd()
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if err != nil {
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return err
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}
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return setInt(fd, &sockOpts[ssoTTL], ttl)
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}
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