bharnden
GitHub
commit
f04d7a7185
1 changed files with 639 additions and 0 deletions
639
daemon/core/services/frr.py
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639
daemon/core/services/frr.py
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"""
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frr.py: defines routing services provided by FRRouting.
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Assumes installation of FRR via https://deb.frrouting.org/
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"""
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from core import constants
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from core.enumerations import LinkTypes, NodeTypes
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from core.misc import ipaddress
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from core.misc import nodeutils
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from core.service import CoreService
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class FRRZebra(CoreService):
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name = "FRRzebra"
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group = "FRR"
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dirs = (
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"/usr/local/etc/frr",
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"/var/run/frr",
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"/var/log/frr",
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)
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configs = (
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"/usr/local/etc/frr/frr.conf",
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"frrboot.sh",
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"/usr/local/etc/frr/vtysh.conf",
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"/usr/local/etc/frr/daemons",
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)
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startup = ("sh frrboot.sh zebra",)
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shutdown = ("killall zebra",)
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validate = ("pidof zebra",)
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@classmethod
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def generate_config(cls, node, filename):
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"""
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Return the frr.conf or frrboot.sh file contents.
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"""
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if filename == cls.configs[0]:
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return cls.generateFrrConf(node)
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elif filename == cls.configs[1]:
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return cls.generateFrrBoot(node)
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elif filename == cls.configs[2]:
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return cls.generateVtyshConf(node)
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elif filename == cls.configs[3]:
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return cls.generateFrrDaemons(node)
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else:
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raise ValueError("file name (%s) is not a known configuration: %s", filename, cls.configs)
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@classmethod
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def generateVtyshConf(cls, node):
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"""
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Returns configuration file text.
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"""
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return "service integrated-vtysh-config\n"
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@classmethod
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def generateFrrConf(cls, node):
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"""
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Returns configuration file text. Other services that depend on zebra
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will have generatefrrifcconfig() and generatefrrconfig()
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hooks that are invoked here.
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"""
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# we could verify here that filename == frr.conf
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cfg = ""
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for ifc in node.netifs():
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cfg += "interface %s\n" % ifc.name
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# include control interfaces in addressing but not routing daemons
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if hasattr(ifc, 'control') and ifc.control is True:
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cfg += " "
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cfg += "\n ".join(map(cls.addrstr, ifc.addrlist))
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cfg += "\n"
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continue
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cfgv4 = ""
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cfgv6 = ""
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want_ipv4 = False
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want_ipv6 = False
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for s in node.services:
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if cls.name not in s.dependencies:
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continue
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ifccfg = s.generatefrrifcconfig(node, ifc)
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if s.ipv4_routing:
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want_ipv4 = True
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if s.ipv6_routing:
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want_ipv6 = True
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cfgv6 += ifccfg
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else:
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cfgv4 += ifccfg
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if want_ipv4:
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ipv4list = filter(lambda x: ipaddress.is_ipv4_address(x.split('/')[0]), ifc.addrlist)
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cfg += " "
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cfg += "\n ".join(map(cls.addrstr, ipv4list))
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cfg += "\n"
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cfg += cfgv4
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if want_ipv6:
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ipv6list = filter(lambda x: ipaddress.is_ipv6_address(x.split('/')[0]), ifc.addrlist)
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cfg += " "
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cfg += "\n ".join(map(cls.addrstr, ipv6list))
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cfg += "\n"
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cfg += cfgv6
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cfg += "!\n"
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for s in node.services:
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if cls.name not in s.dependencies:
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continue
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cfg += s.generatefrrconfig(node)
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return cfg
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@staticmethod
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def addrstr(x):
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"""
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helper for mapping IP addresses to zebra config statements
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"""
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if x.find(".") >= 0:
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return "ip address %s" % x
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elif x.find(":") >= 0:
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return "ipv6 address %s" % x
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else:
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raise ValueError("invalid address: %s", x)
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@classmethod
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def generateFrrBoot(cls, node):
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"""
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Generate a shell script used to boot the FRR daemons.
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"""
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frr_bin_search = node.session.options.get_config("frr_bin_search",
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default='"/usr/local/bin /usr/bin /usr/lib/frr"')
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frr_sbin_search = node.session.options.get_config('frr_sbin_search',
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default='"/usr/local/sbin /usr/sbin /usr/lib/frr"')
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return """\
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#!/bin/sh
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# auto-generated by zebra service (frr.py)
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FRR_CONF=%s
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FRR_SBIN_SEARCH=%s
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FRR_BIN_SEARCH=%s
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FRR_STATE_DIR=%s
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searchforprog()
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{
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prog=$1
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searchpath=$@
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ret=
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for p in $searchpath; do
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if [ -x $p/$prog ]; then
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ret=$p
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break
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fi
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done
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echo $ret
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}
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confcheck()
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{
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CONF_DIR=`dirname $FRR_CONF`
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# if /etc/frr exists, point /etc/frr/frr.conf -> CONF_DIR
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if [ "$CONF_DIR" != "/etc/frr" ] && [ -d /etc/frr ] && [ ! -e /etc/frr/frr.conf ]; then
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ln -s $CONF_DIR/frr.conf /etc/frr/frr.conf
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fi
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# if /etc/frr exists, point /etc/frr/vtysh.conf -> CONF_DIR
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if [ "$CONF_DIR" != "/etc/frr" ] && [ -d /etc/frr ] && [ ! -e /etc/frr/vtysh.conf ]; then
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ln -s $CONF_DIR/vtysh.conf /etc/frr/vtysh.conf
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fi
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}
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bootdaemon()
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{
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FRR_SBIN_DIR=$(searchforprog $1 $FRR_SBIN_SEARCH)
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if [ "z$FRR_SBIN_DIR" = "z" ]; then
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echo "ERROR: FRR's '$1' daemon not found in search path:"
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echo " $FRR_SBIN_SEARCH"
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return 1
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fi
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flags=""
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if [ "$1" = "xpimd" ] && \\
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grep -E -q '^[[:space:]]*router[[:space:]]+pim6[[:space:]]*$' $FRR_CONF; then
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flags="$flags -6"
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fi
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#force FRR to use CORE generated conf file
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flags="$flags -d -f $FRR_CONF"
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$FRR_SBIN_DIR/$1 $flags
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if [ "$?" != "0" ]; then
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echo "ERROR: FRR's '$1' daemon failed to start!:"
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return 1
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fi
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}
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bootfrr()
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{
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FRR_BIN_DIR=$(searchforprog 'vtysh' $FRR_BIN_SEARCH)
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if [ "z$FRR_BIN_DIR" = "z" ]; then
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echo "ERROR: FRR's 'vtysh' program not found in search path:"
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echo " $FRR_BIN_SEARCH"
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return 1
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fi
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# fix /var/run/frr permissions
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id -u frr 2>/dev/null >/dev/null
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if [ "$?" = "0" ]; then
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chown frr $FRR_STATE_DIR
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fi
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bootdaemon "zebra"
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for r in rip ripng ospf6 ospf bgp babel; do
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if grep -q "^router \<${r}\>" $FRR_CONF; then
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bootdaemon "${r}d"
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fi
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done
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if grep -E -q '^[[:space:]]*router[[:space:]]+pim6?[[:space:]]*$' $FRR_CONF; then
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bootdaemon "xpimd"
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fi
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$FRR_BIN_DIR/vtysh -b
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}
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if [ "$1" != "zebra" ]; then
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echo "WARNING: '$1': all FRR daemons are launched by the 'zebra' service!"
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exit 1
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fi
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confcheck
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bootfrr
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""" % (cls.configs[0], frr_sbin_search, frr_bin_search, constants.FRR_STATE_DIR)
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@classmethod
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def generateFrrDaemons(cls, node):
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"""
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Returns configuration file text.
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"""
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return """\
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#
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# When activation a daemon at the first time, a config file, even if it is
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# empty, has to be present *and* be owned by the user and group "frr", else
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# the daemon will not be started by /etc/init.d/frr. The permissions should
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# be u=rw,g=r,o=.
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# When using "vtysh" such a config file is also needed. It should be owned by
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# group "frrvty" and set to ug=rw,o= though. Check /etc/pam.d/frr, too.
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#
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# The watchfrr and zebra daemons are always started.
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#
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bgpd=yes
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ospfd=yes
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ospf6d=yes
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ripd=yes
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ripngd=yes
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isisd=yes
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pimd=yes
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ldpd=yes
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nhrpd=yes
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eigrpd=yes
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babeld=yes
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sharpd=yes
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pbrd=yes
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bfdd=yes
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fabricd=yes
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#
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# If this option is set the /etc/init.d/frr script automatically loads
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# the config via "vtysh -b" when the servers are started.
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# Check /etc/pam.d/frr if you intend to use "vtysh"!
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#
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vtysh_enable=yes
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zebra_options=" -A 127.0.0.1 -s 90000000"
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bgpd_options=" -A 127.0.0.1"
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ospfd_options=" -A 127.0.0.1"
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ospf6d_options=" -A ::1"
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ripd_options=" -A 127.0.0.1"
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ripngd_options=" -A ::1"
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isisd_options=" -A 127.0.0.1"
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pimd_options=" -A 127.0.0.1"
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ldpd_options=" -A 127.0.0.1"
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nhrpd_options=" -A 127.0.0.1"
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eigrpd_options=" -A 127.0.0.1"
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babeld_options=" -A 127.0.0.1"
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sharpd_options=" -A 127.0.0.1"
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pbrd_options=" -A 127.0.0.1"
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staticd_options="-A 127.0.0.1"
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bfdd_options=" -A 127.0.0.1"
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fabricd_options="-A 127.0.0.1"
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# The list of daemons to watch is automatically generated by the init script.
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#watchfrr_options=""
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# for debugging purposes, you can specify a "wrap" command to start instead
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# of starting the daemon directly, e.g. to use valgrind on ospfd:
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# ospfd_wrap="/usr/bin/valgrind"
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# or you can use "all_wrap" for all daemons, e.g. to use perf record:
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# all_wrap="/usr/bin/perf record --call-graph -"
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# the normal daemon command is added to this at the end.
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"""
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class FrrService(CoreService):
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"""
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Parent class for FRR services. Defines properties and methods
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common to FRR's routing daemons.
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"""
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name = None
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group = "FRR"
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dependencies = ("FRRzebra",)
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dirs = ()
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configs = ()
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startup = ()
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shutdown = ()
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meta = "The config file for this service can be found in the Zebra service."
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ipv4_routing = False
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ipv6_routing = False
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@staticmethod
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def routerid(node):
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"""
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Helper to return the first IPv4 address of a node as its router ID.
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"""
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for ifc in node.netifs():
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if hasattr(ifc, 'control') and ifc.control is True:
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continue
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for a in ifc.addrlist:
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if a.find(".") >= 0:
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return a.split('/')[0]
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# raise ValueError, "no IPv4 address found for router ID"
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return "0.0.0.0"
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@staticmethod
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def rj45check(ifc):
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"""
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Helper to detect whether interface is connected an external RJ45
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link.
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"""
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if ifc.net:
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for peerifc in ifc.net.netifs():
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if peerifc == ifc:
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continue
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if nodeutils.is_node(peerifc, NodeTypes.RJ45):
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return True
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return False
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@classmethod
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def generate_config(cls, node, filename):
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return ""
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@classmethod
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def generatefrrifcconfig(cls, node, ifc):
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return ""
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@classmethod
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def generatefrrconfig(cls, node):
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return ""
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class FRROspfv2(FrrService):
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"""
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The OSPFv2 service provides IPv4 routing for wired networks. It does
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not build its own configuration file but has hooks for adding to the
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unified frr.conf file.
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"""
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name = "FRROSPFv2"
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startup = ()
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shutdown = ("killall ospfd",)
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validate = ("pidof ospfd",)
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ipv4_routing = True
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@staticmethod
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def mtucheck(ifc):
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"""
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Helper to detect MTU mismatch and add the appropriate OSPF
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mtu-ignore command. This is needed when e.g. a node is linked via a
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GreTap device.
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"""
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if ifc.mtu != 1500:
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# a workaround for PhysicalNode GreTap, which has no knowledge of
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# the other nodes/nets
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return " ip ospf mtu-ignore\n"
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if not ifc.net:
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return ""
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for i in ifc.net.netifs():
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if i.mtu != ifc.mtu:
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return " ip ospf mtu-ignore\n"
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return ""
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@staticmethod
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def ptpcheck(ifc):
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"""
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Helper to detect whether interface is connected to a notional
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point-to-point link.
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"""
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if nodeutils.is_node(ifc.net, NodeTypes.PEER_TO_PEER):
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return " ip ospf network point-to-point\n"
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return ""
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@classmethod
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def generatefrrconfig(cls, node):
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cfg = "router ospf\n"
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rtrid = cls.routerid(node)
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cfg += " router-id %s\n" % rtrid
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# network 10.0.0.0/24 area 0
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for ifc in node.netifs():
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if hasattr(ifc, 'control') and ifc.control is True:
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continue
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for a in ifc.addrlist:
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if a.find(".") < 0:
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continue
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net = ipaddress.Ipv4Prefix(a)
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cfg += " network %s area 0\n" % net
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cfg += "!\n"
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return cfg
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@classmethod
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def generatefrrifcconfig(cls, node, ifc):
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return cls.mtucheck(ifc)
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# cfg = cls.mtucheck(ifc)
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# external RJ45 connections will use default OSPF timers
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# if cls.rj45check(ifc):
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# return cfg
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# cfg += cls.ptpcheck(ifc)
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# return cfg + """\
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# ip ospf hello-interval 2
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# ip ospf dead-interval 6
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# ip ospf retransmit-interval 5
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# """
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class FRROspfv3(FrrService):
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"""
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The OSPFv3 service provides IPv6 routing for wired networks. It does
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not build its own configuration file but has hooks for adding to the
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unified frr.conf file.
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"""
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name = "FRROSPFv3"
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startup = ()
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shutdown = ("killall ospf6d",)
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validate = ("pidof ospf6d",)
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ipv4_routing = True
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ipv6_routing = True
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@staticmethod
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def minmtu(ifc):
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"""
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Helper to discover the minimum MTU of interfaces linked with the
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given interface.
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"""
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mtu = ifc.mtu
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if not ifc.net:
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return mtu
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for i in ifc.net.netifs():
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if i.mtu < mtu:
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mtu = i.mtu
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return mtu
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@classmethod
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def mtucheck(cls, ifc):
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"""
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Helper to detect MTU mismatch and add the appropriate OSPFv3
|
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ifmtu command. This is needed when e.g. a node is linked via a
|
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GreTap device.
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"""
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minmtu = cls.minmtu(ifc)
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if minmtu < ifc.mtu:
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return " ipv6 ospf6 ifmtu %d\n" % minmtu
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else:
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return ""
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@staticmethod
|
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def ptpcheck(ifc):
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"""
|
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Helper to detect whether interface is connected to a notional
|
||||
point-to-point link.
|
||||
"""
|
||||
if nodeutils.is_node(ifc.net, NodeTypes.PEER_TO_PEER):
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return " ipv6 ospf6 network point-to-point\n"
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return ""
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@classmethod
|
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def generatefrrconfig(cls, node):
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cfg = "router ospf6\n"
|
||||
rtrid = cls.routerid(node)
|
||||
cfg += " router-id %s\n" % rtrid
|
||||
for ifc in node.netifs():
|
||||
if hasattr(ifc, 'control') and ifc.control is True:
|
||||
continue
|
||||
cfg += " interface %s area 0.0.0.0\n" % ifc.name
|
||||
cfg += "!\n"
|
||||
return cfg
|
||||
|
||||
@classmethod
|
||||
def generatefrrifcconfig(cls, node, ifc):
|
||||
return cls.mtucheck(ifc)
|
||||
# cfg = cls.mtucheck(ifc)
|
||||
# external RJ45 connections will use default OSPF timers
|
||||
# if cls.rj45check(ifc):
|
||||
# return cfg
|
||||
# cfg += cls.ptpcheck(ifc)
|
||||
|
||||
# return cfg + """\
|
||||
|
||||
|
||||
# ipv6 ospf6 hello-interval 2
|
||||
# ipv6 ospf6 dead-interval 6
|
||||
# ipv6 ospf6 retransmit-interval 5
|
||||
# """
|
||||
|
||||
|
||||
class FRRBgp(FrrService):
|
||||
"""
|
||||
The BGP service provides interdomain routing.
|
||||
Peers must be manually configured, with a full mesh for those
|
||||
having the same AS number.
|
||||
"""
|
||||
name = "FRRBGP"
|
||||
startup = ()
|
||||
shutdown = ("killall bgpd",)
|
||||
validate = ("pidof bgpd",)
|
||||
custom_needed = True
|
||||
ipv4_routing = True
|
||||
ipv6_routing = True
|
||||
|
||||
@classmethod
|
||||
def generatefrrconfig(cls, node):
|
||||
cfg = "!\n! BGP configuration\n!\n"
|
||||
cfg += "! You should configure the AS number below,\n"
|
||||
cfg += "! along with this router's peers.\n!\n"
|
||||
cfg += "router bgp %s\n" % node.objid
|
||||
rtrid = cls.routerid(node)
|
||||
cfg += " bgp router-id %s\n" % rtrid
|
||||
cfg += " redistribute connected\n"
|
||||
cfg += "! neighbor 1.2.3.4 remote-as 555\n!\n"
|
||||
return cfg
|
||||
|
||||
|
||||
class FRRRip(FrrService):
|
||||
"""
|
||||
The RIP service provides IPv4 routing for wired networks.
|
||||
"""
|
||||
name = "FRRRIP"
|
||||
startup = ()
|
||||
shutdown = ("killall ripd",)
|
||||
validate = ("pidof ripd",)
|
||||
ipv4_routing = True
|
||||
|
||||
@classmethod
|
||||
def generatefrrconfig(cls, node):
|
||||
cfg = """\
|
||||
router rip
|
||||
redistribute static
|
||||
redistribute connected
|
||||
redistribute ospf
|
||||
network 0.0.0.0/0
|
||||
!
|
||||
"""
|
||||
return cfg
|
||||
|
||||
|
||||
class FRRRipng(FrrService):
|
||||
"""
|
||||
The RIP NG service provides IPv6 routing for wired networks.
|
||||
"""
|
||||
name = "FRRRIPNG"
|
||||
startup = ()
|
||||
shutdown = ("killall ripngd",)
|
||||
validate = ("pidof ripngd",)
|
||||
ipv6_routing = True
|
||||
|
||||
@classmethod
|
||||
def generatefrrconfig(cls, node):
|
||||
cfg = """\
|
||||
router ripng
|
||||
redistribute static
|
||||
redistribute connected
|
||||
redistribute ospf6
|
||||
network ::/0
|
||||
!
|
||||
"""
|
||||
return cfg
|
||||
|
||||
|
||||
class FRRBabel(FrrService):
|
||||
"""
|
||||
The Babel service provides a loop-avoiding distance-vector routing
|
||||
protocol for IPv6 and IPv4 with fast convergence properties.
|
||||
"""
|
||||
name = "FRRBabel"
|
||||
startup = ()
|
||||
shutdown = ("killall babeld",)
|
||||
validate = ("pidof babeld",)
|
||||
ipv6_routing = True
|
||||
|
||||
@classmethod
|
||||
def generatefrrconfig(cls, node):
|
||||
cfg = "router babel\n"
|
||||
for ifc in node.netifs():
|
||||
if hasattr(ifc, "control") and ifc.control is True:
|
||||
continue
|
||||
cfg += " network %s\n" % ifc.name
|
||||
cfg += " redistribute static\n redistribute connected\n"
|
||||
return cfg
|
||||
|
||||
@classmethod
|
||||
def generatefrrifcconfig(cls, node, ifc):
|
||||
if ifc.net and ifc.net.linktype == LinkTypes.WIRELESS.value:
|
||||
return " babel wireless\n no babel split-horizon\n"
|
||||
else:
|
||||
return " babel wired\n babel split-horizon\n"
|
||||
|
||||
|
||||
class FRRXpimd(FrrService):
|
||||
"""
|
||||
PIM multicast routing based on XORP.
|
||||
"""
|
||||
name = 'FRRXpimd'
|
||||
startup = ()
|
||||
shutdown = ('killall xpimd',)
|
||||
validate = ('pidof xpimd',)
|
||||
ipv4_routing = True
|
||||
|
||||
@classmethod
|
||||
def generatefrrconfig(cls, node):
|
||||
ifname = 'eth0'
|
||||
for ifc in node.netifs():
|
||||
if ifc.name != 'lo':
|
||||
ifname = ifc.name
|
||||
break
|
||||
cfg = 'router mfea\n!\n'
|
||||
cfg += 'router igmp\n!\n'
|
||||
cfg += 'router pim\n'
|
||||
cfg += ' !ip pim rp-address 10.0.0.1\n'
|
||||
cfg += ' ip pim bsr-candidate %s\n' % ifname
|
||||
cfg += ' ip pim rp-candidate %s\n' % ifname
|
||||
cfg += ' !ip pim spt-threshold interval 10 bytes 80000\n'
|
||||
return cfg
|
||||
|
||||
@classmethod
|
||||
def generatefrrifcconfig(cls, node, ifc):
|
||||
return ' ip mfea\n ip igmp\n ip pim\n'
|
||||
Loading…
Reference in a new issue