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mirror of https://github.com/GNS3/gns3-server synced 2024-11-13 20:08:55 +00:00

Convert topologies < 3.0 to have valid node hostnames

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grossmj 2024-07-20 17:22:24 +02:00
parent ea339af1e9
commit 999f41b03e
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4 changed files with 206 additions and 2 deletions

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@ -495,7 +495,7 @@ class Project:
if base_name is None:
return None
base_name = re.sub(r"[ ]", "", base_name)
base_name = re.sub(r"[ ]", "", base_name) # remove spaces in node name
if base_name in self._allocated_node_names:
base_name = re.sub(r"[0-9]+$", "{0}", base_name)

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@ -35,6 +35,7 @@ from .drawing import Drawing
from .node import Node
from .link import Link
from gns3server.utils.hostname import is_ios_hostname_valid, is_rfc1123_hostname_valid, to_rfc1123_hostname, to_ios_hostname
from gns3server.schemas.controller.topology import Topology
from gns3server.schemas.compute.dynamips_nodes import DynamipsCreate
@ -43,7 +44,7 @@ import logging
log = logging.getLogger(__name__)
GNS3_FILE_FORMAT_REVISION = 9
GNS3_FILE_FORMAT_REVISION = 10
class DynamipsNodeValidation(DynamipsCreate):
@ -186,6 +187,10 @@ def load_topology(path):
if variables:
topo["variables"] = [var for var in variables if var.get("name")]
# Version before GNS3 3.0
if topo["revision"] < 10:
topo = _convert_2_2_0(topo, path)
try:
_check_topology_schema(topo, path)
except ControllerError as e:
@ -201,6 +206,31 @@ def load_topology(path):
return topo
def _convert_2_2_0(topo, topo_path):
"""
Convert topologies from GNS3 2.2.x to 3.0
Changes:
* Removed acpi_shutdown option from Qemu, VMware and VirtualBox
"""
topo["revision"] = 10
for node in topo.get("topology", {}).get("nodes", []):
# make sure console_type is not None but "none" string
if "properties" in node:
if node["node_type"] in ("qemu", "docker") and not is_rfc1123_hostname_valid(node["name"]):
new_name = to_rfc1123_hostname(node["name"])
log.info(f"Convert node name {node['name']} to {new_name} (RFC1123)")
node["name"] = new_name
if node["node_type"] in ("dynamips", "iou") and not is_ios_hostname_valid(node["name"] ):
new_name = to_ios_hostname(node["name"])
log.info(f"Convert node name {node['name']} to {new_name} (IOS)")
node["name"] = new_name
return topo
def _convert_2_1_0(topo, topo_path):
"""
Convert topologies from GNS3 2.1.x to 2.2

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@ -32,6 +32,28 @@ def is_ios_hostname_valid(hostname: str) -> bool:
return False
def to_ios_hostname(name):
"""
Convert name to an IOS hostname
"""
# Replace invalid characters with hyphens
name = re.sub(r'[^a-zA-Z0-9-]', '-', name)
# Ensure the hostname starts with a letter
if not re.search(r'^[a-zA-Z]', name):
name = 'a' + name
# Ensure the hostname ends with a letter or digit
if not re.search(r'[a-zA-Z0-9]$', name):
name = name.rstrip('-') + '0'
# Truncate the hostname to 63 characters
name = name[:63]
return name
def is_rfc1123_hostname_valid(hostname: str) -> bool:
"""
Check if a hostname is valid according to RFC 1123
@ -57,3 +79,34 @@ def is_rfc1123_hostname_valid(hostname: str) -> bool:
allowed = re.compile(r"(?!-)[a-zA-Z0-9-]{1,63}(?<!-)$")
return all(allowed.match(label) for label in labels)
def to_rfc1123_hostname(name: str) -> str:
"""
Convert name to RFC 1123 hostname
"""
# Replace invalid characters with hyphens
name = re.sub(r'[^a-zA-Z0-9-.]', '-', name)
# Remove trailing dot if it exists
name = name.rstrip('.')
# Ensure each label is not longer than 63 characters
labels = name.split('.')
labels = [label[:63] for label in labels]
# Remove leading and trailing hyphens from each label if they exist
labels = [label.strip('-') for label in labels]
# Check if the TLD is all-numeric and if so, replace it with "invalid"
if re.match(r"[0-9]+$", labels[-1]):
labels[-1] = 'invalid'
# Join the labels back together
name = '.'.join(labels)
# Ensure the total length is not longer than 253 characters
name = name[:253]
return name

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@ -0,0 +1,121 @@
# -*- coding: utf-8 -*-
#
# Copyright (C) 2024 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from gns3server.utils import hostname
def test_ios_hostname_valid_with_valid_hostnames():
assert hostname.is_ios_hostname_valid("router1")
assert hostname.is_ios_hostname_valid("switch-2")
assert hostname.is_ios_hostname_valid("a1-b2-c3")
def test_ios_hostname_valid_with_invalid_hostnames():
assert not hostname.is_ios_hostname_valid("-router")
assert not hostname.is_ios_hostname_valid("router-")
assert not hostname.is_ios_hostname_valid("123router")
assert not hostname.is_ios_hostname_valid("router@123")
assert not hostname.is_ios_hostname_valid("router.router")
def test_ios_hostname_valid_with_long_hostnames():
assert hostname.is_ios_hostname_valid("a" * 63)
assert not hostname.is_ios_hostname_valid("a" * 64)
def test_ios_hostname_conversion_with_valid_characters():
assert hostname.to_ios_hostname("validHostname123") == "validHostname123"
def test_ios_hostname_conversion_starts_with_digit():
assert hostname.to_ios_hostname("1InvalidStart") == "a1InvalidStart"
def test_ios_hostname_conversion_starts_with_special_character():
assert hostname.to_ios_hostname("@InvalidStart") == "a-InvalidStart"
def test_ios_hostname_conversion_ends_with_special_character():
assert hostname.to_ios_hostname("InvalidEnd-") == "InvalidEnd0"
def test_ios_hostname_conversion_contains_special_characters():
assert hostname.to_ios_hostname("Invalid@Hostname!") == "Invalid-Hostname0"
def test_ios_hostname_conversion_exceeds_max_length():
long_name = "a" * 64
assert hostname.to_ios_hostname(long_name) == "a" * 63
def test_ios_hostname_conversion_just_right_length():
exact_length_name = "a" * 63
assert hostname.to_ios_hostname(exact_length_name) == "a" * 63
def test_rfc1123_hostname_validity_with_valid_hostnames():
assert hostname.is_rfc1123_hostname_valid("example.com")
assert hostname.is_rfc1123_hostname_valid("subdomain.example.com")
assert hostname.is_rfc1123_hostname_valid("example-hyphen.com")
assert hostname.is_rfc1123_hostname_valid("example.com.")
assert hostname.is_rfc1123_hostname_valid("123.com")
def test_rfc1123_hostname_validity_with_invalid_hostnames():
assert not hostname.is_rfc1123_hostname_valid("-example.com")
assert not hostname.is_rfc1123_hostname_valid("example-.com")
assert not hostname.is_rfc1123_hostname_valid("example..com")
assert not hostname.is_rfc1123_hostname_valid("example_com")
assert not hostname.is_rfc1123_hostname_valid("example.123")
def test_rfc1123_hostname_validity_with_long_hostnames():
long_hostname = "a" * 63 + "." + "b" * 63 + "." + "c" * 63 + "." + "d" * 61 # 253 characters
too_long_hostname = long_hostname + "e"
assert hostname.is_rfc1123_hostname_valid(long_hostname)
assert not hostname.is_rfc1123_hostname_valid(too_long_hostname)
def test_rfc1123_conversion_hostname_with_valid_characters():
assert hostname.to_rfc1123_hostname("valid-hostname.example.com") == "valid-hostname.example.com"
def test_rfc1123_conversion_hostname_with_invalid_characters_replaced():
assert hostname.to_rfc1123_hostname("invalid_hostname!@#$.example") == "invalid-hostname.example"
def test_rfc1123_conversion_hostname_with_trailing_dot_removed():
assert hostname.to_rfc1123_hostname("hostname.example.com.") == "hostname.example.com"
def test_rfc1123_conversion_hostname_with_labels_exceeding_63_characters():
long_label = "a" * 64 + ".example.com"
expected_label = "a" * 63 + ".example.com"
assert hostname.to_rfc1123_hostname(long_label) == expected_label
def test_rfc1123_conversion_hostname_with_total_length_exceeding_253_characters():
long_hostname = "a" * 50 + "." + "b" * 50 + "." + "c" * 50 + "." + "d" * 50 + "." + "e" * 50
assert len(hostname.to_rfc1123_hostname(long_hostname)) <= 253
def test_rfc1123_conversion_hostname_with_all_numeric_tld_replaced():
assert hostname.to_rfc1123_hostname("hostname.123") == "hostname.invalid"
def rfc1123_hostname_with_multiple_consecutive_invalid_characters():
assert hostname.to_rfc1123_hostname("hostname!!!.example..com") == "hostname---.example.com"