Coverage for birdplan/bird_config/sections/protocols/kernel.py: 97%

1# 

2# SPDX-License-Identifier: GPL-3.0-or-later 

3# 

4# Copyright (c) 2019-2024, AllWorldIT 

5# 

6# This program is free software: you can redistribute it and/or modify 

7# it under the terms of the GNU General Public License as published by 

8# the Free Software Foundation, either version 3 of the License, or 

9# (at your option) any later version. 

10# 

11# This program is distributed in the hope that it will be useful, 

12# but WITHOUT ANY WARRANTY; without even the implied warranty of 

13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

14# GNU General Public License for more details. 

15# 

16# You should have received a copy of the GNU General Public License 

17# along with this program. If not, see <http://www.gnu.org/licenses/>. 

18 

19"""BIRD kernel protocol configuration.""" 

20 

21from .base import SectionProtocolBase 

22 

23__all__ = ["ProtocolKernel"] 

24 

25 

26class ProtocolKernel(SectionProtocolBase): 

27 """BIRD kernel protocol configuration.""" 

28 

29 def configure(self) -> None: 

30 """Configure the kernel protocol.""" 

31 super().configure() 

32 

33 # Set section header 

34 self._section = "Kernel Protocol" 

35 

36 # Configure the kernel protocol 

37 self._configure_protocol_kernel("4") 

38 self._configure_protocol_kernel("6") 

39 

40 def _configure_protocol_kernel(self, ipv: str) -> None: 

41 """Protocol configuration.""" 

42 self.conf.add(f"protocol kernel kernel{ipv} {{") 

43 self.conf.add(f' description "Kernel protocol for IPv{ipv}";') 

44 self.conf.add("") 

45 self.conf.add(f" vrf {self.birdconfig_globals.vrf};") 

46 # If we have a routing table, add it 

47 if self.birdconfig_globals.routing_table: 

48 self.conf.add(f" kernel table {self.birdconfig_globals.routing_table};") 

49 self.conf.add("") 

50 self.conf.add(" metric 600; # Set the BIRD metric to be used when creating kernel routes to fall in line with our OS") 

51 self.conf.add(" learn; # Learn routes from the kernel") 

52 self.conf.add(" merge paths on; # Merge similar BGP paths into a multi-hop") 

53 self.conf.add("") 

54 self.conf.add(" netlink rx buffer 16777216; # Ensure our netlink buffer is big enough") 

55 self.conf.add("") 

56 self.conf.add(f" ipv{ipv} {{") 

57 self.conf.add(f" table t_kernel{ipv};") 

58 self.conf.add("") 

59 self.conf.add(" export all;") 

60 self.conf.add(" import all;") 

61 self.conf.add(" };") 

62 self.conf.add("};") 

63 self.conf.add("")