tools/testing/selftests/net/gre_ipv6_lladdr.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/gre_ipv6_lladdr.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/gre_ipv6_lladdr.sh
Extension
.sh
Size
4825 bytes
Lines
185
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

source ./lib.sh

PAUSE_ON_FAIL="no"

# The trap function handler
#
exit_cleanup_all()
{
	cleanup_all_ns

	exit "${EXIT_STATUS}"
}

# Add fake IPv4 and IPv6 networks on the loopback device, to be used as
# underlay by future GRE devices.
#
setup_basenet()
{
	ip -netns "${NS0}" link set dev lo up
	ip -netns "${NS0}" address add dev lo 192.0.2.10/24
	ip -netns "${NS0}" address add dev lo 2001:db8::10/64 nodad
}

# Check the IPv6 configuration of a network device.
#
# We currently check the generation of the link-local IPv6 address and the
# creation of the ff00::/8 multicast route.
#
# Parameters:
#
#   * $1: The network device to test
#   * $2: An extra regular expression that should be matched (to verify the
#         presence of extra attributes)
#   * $3: The expected return code from grep (to allow checking the absence of
#         a link-local address)
#   * $4: The user visible name for the scenario being tested
#
check_ipv6_device_config()
{
	local DEV="$1"
	local EXTRA_MATCH="$2"
	local XRET="$3"
	local MSG="$4"

	RET=0
	set +e
	ip -netns "${NS0}" -6 address show dev "${DEV}" scope link | grep "fe80::" | grep -q "${EXTRA_MATCH}"
	check_err_fail "${XRET}" $? "IPv6 link-local address generation"

	ip -netns "${NS0}" -6 route show table local type multicast ff00::/8 proto kernel | grep -q "${DEV}"
	check_err_fail 0 $? "IPv6 multicast route creation"

	log_test "${MSG}"
	set -e
}

# Create a GRE device and verify that it gets an IPv6 link-local address as
# expected.
#
# Parameters:
#
#   * $1: The device type (gre, ip6gre, gretap or ip6gretap)
#   * $2: The local underlay IP address (can be an IPv4, an IPv6 or "any")
#   * $3: The remote underlay IP address (can be an IPv4, an IPv6 or "any")
#   * $4: The IPv6 interface identifier generation mode to use for the GRE
#         device (eui64, none, stable-privacy or random).
#

Annotation

Implementation Notes