mirror of
https://github.com/refraction-networking/uquic.git
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74be4d2755
This function is the equivalent to the function used to set the UDP receive buffer size. It's so similar that code generation is used to make a copy of the setReceiveBuffer function.
70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
// We need root permissions to use RCVBUFFORCE.
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// This test is therefore only compiled when the root build flag is set.
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// It can only succeed if the tests are then also run with root permissions.
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//go:build linux && root
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package quic
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import (
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"net"
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"os"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("forcing a change of send and receive buffer sizes", func() {
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It("forces a change of the receive buffer size", func() {
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if os.Getuid() != 0 {
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Fail("Must be root to force change the receive buffer size")
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}
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c, err := net.ListenPacket("udp", "127.0.0.1:0")
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Expect(err).ToNot(HaveOccurred())
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defer c.Close()
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syscallConn, err := c.(*net.UDPConn).SyscallConn()
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Expect(err).ToNot(HaveOccurred())
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const small = 256 << 10 // 256 KB
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Expect(forceSetReceiveBuffer(syscallConn, small)).To(Succeed())
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size, err := inspectReadBuffer(syscallConn)
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Expect(err).ToNot(HaveOccurred())
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// The kernel doubles this value (to allow space for bookkeeping overhead)
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Expect(size).To(Equal(2 * small))
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const large = 32 << 20 // 32 MB
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Expect(forceSetReceiveBuffer(syscallConn, large)).To(Succeed())
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size, err = inspectReadBuffer(syscallConn)
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Expect(err).ToNot(HaveOccurred())
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// The kernel doubles this value (to allow space for bookkeeping overhead)
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Expect(size).To(Equal(2 * large))
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})
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It("forces a change of the send buffer size", func() {
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if os.Getuid() != 0 {
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Fail("Must be root to force change the send buffer size")
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}
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c, err := net.ListenPacket("udp", "127.0.0.1:0")
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Expect(err).ToNot(HaveOccurred())
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defer c.Close()
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syscallConn, err := c.(*net.UDPConn).SyscallConn()
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Expect(err).ToNot(HaveOccurred())
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const small = 256 << 10 // 256 KB
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Expect(forceSetSendBuffer(syscallConn, small)).To(Succeed())
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size, err := inspectWriteBuffer(syscallConn)
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Expect(err).ToNot(HaveOccurred())
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// The kernel doubles this value (to allow space for bookkeeping overhead)
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Expect(size).To(Equal(2 * small))
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const large = 32 << 20 // 32 MB
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Expect(forceSetSendBuffer(syscallConn, large)).To(Succeed())
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size, err = inspectWriteBuffer(syscallConn)
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Expect(err).ToNot(HaveOccurred())
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// The kernel doubles this value (to allow space for bookkeeping overhead)
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Expect(size).To(Equal(2 * large))
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})
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})
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