[netconf.git] / netconf

#!/usr/bin/env python
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source.  A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#

#
# Copyright 2017 <Michael Rasmussen>
#

#
# The porpuse of this script is to help with basic and/or initial
# network configuration for Illumos based distribution. However,
# the script is developed specifically for OmniOS so there is no
# garaunty that it will work on other Illumos based distributions
# than Omnios.
#

import sys, subprocess, getopt

def runcmd(cmd):
    process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
    output, error = process.communicate();
    
    return (output.rstrip(), error.rstrip())

class ParserError(Exception):
    pass

class Parser:
    """ Parse nic information """
    
    def __init__(self):
        self.__dladm1 = "dladm show-phys -p -o link,media | sed 's/:/ /g'"
        self.__dladm2 = "dladm show-phys -p -m -o link,address,inuse | sed 's/:/ /g' | sed 's/\\\[[:space:]]/:/g' | sed 's/\\\//g'"

    def __parse_nics(self, text):
        nics = {}
        for line in text.splitlines():
            parts = line.split()
            #if parts[1] in ('Ethernet', 'Infiniband'):
            if parts[1] in ('Ethernet'):
                nics[parts[0]] = [parts[0], parts[1]]
    
        return nics

    def __parse_macs(self, obj, text):
        list = []
        if obj:
            for line in text.splitlines():
                parts = line.split()
                try:
                    if parts[2] == 'yes':
                        del obj[parts[0]]
                    else:
                        obj[parts[0]].append(parts[1])
                except KeyError:
                    pass
            for k, v in obj.items():
                list.append(v)

        return list

    def parse(self):
        (nics, error) = runcmd(self.__dladm1)
        if error:
            raise ParserError(error)

        (macs, error) = runcmd(self.__dladm2)
        if error:
            raise ParserError(error)

        return self.__parse_macs(self.__parse_nics(nics), macs)

def get_terminal_width():
        try:
            if sys.version_info >= (2,7):
                width = int(subprocess.check_output(['tput', 'cols']))
            else:
                (out, err) = runcmd('tput cols')
                if err:
                    raise OSError(err);
                width = int(out)
        except OSError as e:
            print("Invalid Command 'tput cols': exit status ({1})".format(e.errno))
        except subprocess.CalledProcessError as e:
            print("Command 'tput cols' returned non-zero exit status: ({1})".format(e.returncode))
        else:
            return width

def make_menu(interfaces):
    res = None
    while not res:
        sys.stderr.write("\x1b[2J\x1b[H")
        cols = get_terminal_width()
        intro = 'The following unconfigured interfaces was discovered'
        fill = (cols / 2) - (len(intro) / 2)
        print '{0:^{cols}}'.format('Simple network interface configuration tool', cols=cols)
        print
        print '{0:<{fill}}{1}'.format('', intro, fill=fill)
        print '{0:<{fill}}{1:>2} {2:^15}  {3:^10}  {4:^17}'.format('','#','Interface','Media','MAC',fill=fill)
        print '{0:<{fill}}{1:-^2} {2:-^15}  {3:-^10}  {4:-^17}'.format('','','','','',fill=fill)

        n = 0
        for i in interfaces:
            print '{0:<{fill}}{1:>2} {2:<15}  {3:<10}  {4:>17}'.format('',n,i[0],i[1],i[2],fill=fill)
            n += 1
        print
        print '{0:<{fill}}{1:<}'.format('','select interface number to configure:',fill=fill),
        nic = int(raw_input())
        if nic >= n or nic < 0:
            print '{0:<{fill}}{1:<} {2:<}'.format('','Error: Interface: 0 <= # <',n,fill=fill),
            raw_input(' << Hit any key >>')
        else:
            res = interfaces[nic]

    return res

def get_config():
    ip = mask = gw = None
    nettype = raw_input('dhcp or static [dhcp]: ').lower()
    if nettype == 'static':
        while not ip:
            ip = raw_input('Enter IP: ')
        mask = raw_input('Enter netmask [24]: ')
        if not mask:
            mask = 24
        gw = raw_input('Enter default route [0=no]: ')
        if not gw:
            gw = 0
    
    return (ip,mask,gw)    

def usage():
    print 'Usage: %s [options]' % sys.argv[0] 
    print
    print '%s' % """Options:
    -h, --help		This usage.
    -a, --address	IP for interface. 0 means use DHCP
    -g, --gateway	Default gateway. Optional.
    -i, --interface	Interface to configure.
    -m, --netmask	Netmask to use for interface. Default /24.
    -n, --nameserver	Nameserver to use. Optional."""

def parse_input():
    options = ()

    try:
	opts, args = getopt.gnu_getopt(sys.argv[1:],
                'ha:g:i:m:n:', ['help', 'address=', 'gateway=',
		'interface=', 'netmask=', 'nameserver='])
    except getopt.GetoptError as err:
	print str(err)
	usage()
	sys.exit(2)

    address = gateway = interface = netmask = nameserver = None

    if opts:
	for o, a in opts:
	    if o in ('-h', '--help'):
		usage()
		sys.exit(0)
	    if o in ('-a', '--address'):
		address = a
	    elif o in ('-g', '--gateway'):
		gateway = a
	    elif o in ('-i', '--interface'):
		interface = a
	    elif o in ('-m', '--netmask'):
		netmask = a
	    elif o in ('-n', '--nameserver'):
		nameserver = a
	    else:
		assert False, 'Unhandled option'
    
	if not address or not interface:
	    print 'Error: missing options'
	    usage()
	    sys.exit(2)
	if address == '0':
	    address = None
	if not netmask:
	    netmask = '24'
    
	options = (interface, address, netmask, gateway, nameserver)
    
    return options

def main():
    interactive = True

    options = parse_input()
    if options:
	interactive = False

    p = Parser()
    try:
        interfaces = p.parse()
        if interfaces:
	    if interactive:
		nic = make_menu(interfaces)
	    else:
                nic = options
                found = False
                for i in interfaces:
                    if nic[0] == i[0]:
                        found = True
                        break
                if not found:
                    err = '%s: No such interface' % nic[0]
                    raise RuntimeError(err)
            if nic:
		if interactive:
		    (ip,mask,gw) = get_config()
		else:
		    ip = options[1]
		    mask = options[2]
		    gw = options[3]
                cmd = 'ipadm delete-if %s' % nic[0]
                runcmd(cmd)
                cmd = 'ipadm create-if %s' % nic[0]
                (out, err) = runcmd(cmd)
                if err:
                    raise RuntimeError(err)
                if not ip:
                    # use DHCP
                    cmd = 'ipadm create-addr -T dhcp %s/v4' % nic[0]
                    (out, err) = runcmd(cmd)
                    if err:
                        raise RuntimeError(err)
                else:
                    # use STATIC
                    cmd = 'ipadm create-addr -T static -a %s/%s %s/v4' % (ip, mask, nic[0])
                    (out, err) = runcmd(cmd)
                    if err:
                        raise RuntimeError(err)
                    if gw:
                        cmd = 'route -p add default %s' % gw
                        (out, err) = runcmd(cmd)
                        if err:
                            raise RuntimeError(err)
                cmd = 'netstat -rn -finet'
                (out, err) = runcmd(cmd)
                if err:
                    raise RuntimeError(err)
                print 'New route table'
                print out
		if interactive:
		    dns = raw_input('Configure DNS [n]? ').lower()
		else:
		    dns = options[4]
                if not dns or dns == 'n':
                    pass
                else:
		    if interactive:
			dns = None
			print
			while not dns:
			    dns = raw_input('Enter nameserver: ')

                    cmd = "echo 'nameserver %s' >> /etc/resolv.conf " % dns
                    cmd += '&& cp /etc/nsswitch.conf{,.bak} '
                    cmd += '&& cp /etc/nsswitch.{dns,conf}'
                    (out, err) = runcmd(cmd)
                    if err:
                        raise RuntimeError(err)
        else:
            print "Found no unassigned interfaces"
    except ParserError as e:
        print 'Parse Errror: %s' % e
    except RuntimeError as e:
        print 'Runtime Error: %s' % e

if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        sys.stderr.write("\x1b[2J\x1b[H")
Commit	Line	Data
c947c6e2	1	#!/usr/bin/env python
6640d1bf MR	2	#
	3	# This file and its contents are supplied under the terms of the
	4	# Common Development and Distribution License ("CDDL"), version 1.0.
	5	# You may only use this file in accordance with the terms of version
	6	# 1.0 of the CDDL.
	7	#
	8	# A full copy of the text of the CDDL should have accompanied this
	9	# source. A copy of the CDDL is also available via the Internet at
	10	# http://www.illumos.org/license/CDDL.
	11	#
c947c6e2	12
6640d1bf MR	13	#
	14	# Copyright 2017 <Michael Rasmussen>
	15	#
	16
	17	#
	18	# The porpuse of this script is to help with basic and/or initial
	19	# network configuration for Illumos based distribution. However,
	20	# the script is developed specifically for OmniOS so there is no
	21	# garaunty that it will work on other Illumos based distributions
	22	# than Omnios.
	23	#
	24
	25	import sys, subprocess, getopt
c947c6e2 MR	26
	27	def runcmd(cmd):
	28	process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
	29	output, error = process.communicate();
	30
	31	return (output.rstrip(), error.rstrip())
	32
	33	class ParserError(Exception):
	34	pass
	35
	36	class Parser:
	37	""" Parse nic information """
	38
	39	def __init__(self):
	40	self.__dladm1 = "dladm show-phys -p -o link,media \| sed 's/:/ /g'"
	41	self.__dladm2 = "dladm show-phys -p -m -o link,address,inuse \| sed 's/:/ /g' \| sed 's/\\\[[:space:]]/:/g' \| sed 's/\\\//g'"
	42
	43	def __parse_nics(self, text):
	44	nics = {}
	45	for line in text.splitlines():
	46	parts = line.split()
	47	#if parts[1] in ('Ethernet', 'Infiniband'):
	48	if parts[1] in ('Ethernet'):
	49	nics[parts[0]] = [parts[0], parts[1]]
	50
	51	return nics
	52
	53	def __parse_macs(self, obj, text):
	54	list = []
	55	if obj:
	56	for line in text.splitlines():
	57	parts = line.split()
	58	try:
	59	if parts[2] == 'yes':
	60	del obj[parts[0]]
	61	else:
	62	obj[parts[0]].append(parts[1])
	63	except KeyError:
	64	pass
	65	for k, v in obj.items():
	66	list.append(v)
	67
	68	return list
	69
	70	def parse(self):
	71	(nics, error) = runcmd(self.__dladm1)
	72	if error:
	73	raise ParserError(error)
	74
	75	(macs, error) = runcmd(self.__dladm2)
	76	if error:
	77	raise ParserError(error)
	78
	79	return self.__parse_macs(self.__parse_nics(nics), macs)
	80
	81	def get_terminal_width():
	82	try:
	83	if sys.version_info >= (2,7):
	84	width = int(subprocess.check_output(['tput', 'cols']))
	85	else:
	86	(out, err) = runcmd('tput cols')
	87	if err:
	88	raise OSError(err);
	89	width = int(out)
90	except OSError as e:
91	print("Invalid Command 'tput cols': exit status ({1})".format(e.errno))
92	except subprocess.CalledProcessError as e:
93	print("Command 'tput cols' returned non-zero exit status: ({1})".format(e.returncode))
94	else:
95	return width
96
97	def make_menu(interfaces):
98	res = None
99	while not res:
100	sys.stderr.write("\x1b[2J\x1b[H")
101	cols = get_terminal_width()
102	intro = 'The following unconfigured interfaces was discovered'
103	fill = (cols / 2) - (len(intro) / 2)
104	print '{0:^{cols}}'.format('Simple network interface configuration tool', cols=cols)
105	print
106	print '{0:<{fill}}{1}'.format('', intro, fill=fill)
107	print '{0:<{fill}}{1:>2} {2:^15} {3:^10} {4:^17}'.format('','#','Interface','Media','MAC',fill=fill)
108	print '{0:<{fill}}{1:-^2} {2:-^15} {3:-^10} {4:-^17}'.format('','','','','',fill=fill)
109
110	n = 0
111	for i in interfaces:
112	print '{0:<{fill}}{1:>2} {2:<15} {3:<10} {4:>17}'.format('',n,i[0],i[1],i[2],fill=fill)
113	n += 1
114	print
115	print '{0:<{fill}}{1:<}'.format('','select interface number to configure:',fill=fill),
116	nic = int(raw_input())
117	if nic >= n or nic < 0:
118	print '{0:<{fill}}{1:<} {2:<}'.format('','Error: Interface: 0 <= # <',n,fill=fill),
119	raw_input(' << Hit any key >>')
120	else:
121	res = interfaces[nic]
122
123	return res
124
125	def get_config():
126	ip = mask = gw = None
127	nettype = raw_input('dhcp or static [dhcp]: ').lower()
128	if nettype == 'static':
129	while not ip:
130	ip = raw_input('Enter IP: ')
131	mask = raw_input('Enter netmask [24]: ')
132	if not mask:
133	mask = 24
134	gw = raw_input('Enter default route [0=no]: ')
135	if not gw:
136	gw = 0
137
138	return (ip,mask,gw)
139
6640d1bf MR	140	def usage():
	141	print 'Usage: %s [options]' % sys.argv[0]
	142	print
	143	print '%s' % """Options:
	144	-h, --help This usage.
	145	-a, --address IP for interface. 0 means use DHCP
	146	-g, --gateway Default gateway. Optional.
	147	-i, --interface Interface to configure.
	148	-m, --netmask Netmask to use for interface. Default /24.
	149	-n, --nameserver Nameserver to use. Optional."""
	150
	151	def parse_input():
	152	options = ()
	153
	154	try:
	155	opts, args = getopt.gnu_getopt(sys.argv[1:],
f5cdd655 MR	156	'ha:g:i:m:n:', ['help', 'address=', 'gateway=',
f5cdd655 MR	157	'interface=', 'netmask=', 'nameserver='])
6640d1bf MR	158	except getopt.GetoptError as err:
	159	print str(err)
	160	usage()
	161	sys.exit(2)
	162
	163	address = gateway = interface = netmask = nameserver = None
	164
	165	if opts:
	166	for o, a in opts:
	167	if o in ('-h', '--help'):
	168	usage()
	169	sys.exit(0)
	170	if o in ('-a', '--address'):
	171	address = a
	172	elif o in ('-g', '--gateway'):
	173	gateway = a
	174	elif o in ('-i', '--interface'):
	175	interface = a
	176	elif o in ('-m', '--netmask'):
	177	netmask = a
	178	elif o in ('-n', '--nameserver'):
	179	nameserver = a
	180	else:
	181	assert False, 'Unhandled option'
	182
	183	if not address or not interface:
	184	print 'Error: missing options'
	185	usage()
	186	sys.exit(2)
	187	if address == '0':
	188	address = None
	189	if not netmask:
	190	netmask = '24'
	191
	192	options = (interface, address, netmask, gateway, nameserver)
	193
	194	return options
	195
c947c6e2	196	def main():
6640d1bf MR	197	interactive = True
	198
	199	options = parse_input()
	200	if options:
	201	interactive = False
	202
c947c6e2 MR	203	p = Parser()
	204	try:
	205	interfaces = p.parse()
	206	if interfaces:
6640d1bf MR	207	if interactive:
	208	nic = make_menu(interfaces)
	209	else:
f5cdd655 MR	210	nic = options
	211	found = False
	212	for i in interfaces:
	213	if nic[0] == i[0]:
	214	found = True
	215	break
	216	if not found:
	217	err = '%s: No such interface' % nic[0]
	218	raise RuntimeError(err)
c947c6e2	219	if nic:
6640d1bf MR	220	if interactive:
	221	(ip,mask,gw) = get_config()
	222	else:
	223	ip = options[1]
	224	mask = options[2]
	225	gw = options[3]
c947c6e2 MR	226	cmd = 'ipadm delete-if %s' % nic[0]
	227	runcmd(cmd)
	228	cmd = 'ipadm create-if %s' % nic[0]
	229	(out, err) = runcmd(cmd)
	230	if err:
	231	raise RuntimeError(err)
	232	if not ip:
	233	# use DHCP
	234	cmd = 'ipadm create-addr -T dhcp %s/v4' % nic[0]
	235	(out, err) = runcmd(cmd)
	236	if err:
	237	raise RuntimeError(err)
	238	else:
	239	# use STATIC
	240	cmd = 'ipadm create-addr -T static -a %s/%s %s/v4' % (ip, mask, nic[0])
	241	(out, err) = runcmd(cmd)
	242	if err:
	243	raise RuntimeError(err)
	244	if gw:
	245	cmd = 'route -p add default %s' % gw
	246	(out, err) = runcmd(cmd)
	247	if err:
	248	raise RuntimeError(err)
	249	cmd = 'netstat -rn -finet'
	250	(out, err) = runcmd(cmd)
	251	if err:
	252	raise RuntimeError(err)
	253	print 'New route table'
	254	print out
6640d1bf MR	255	if interactive:
	256	dns = raw_input('Configure DNS [n]? ').lower()
	257	else:
	258	dns = options[4]
c947c6e2 MR	259	if not dns or dns == 'n':
	260	pass
	261	else:
6640d1bf MR	262	if interactive:
	263	dns = None
	264	print
	265	while not dns:
	266	dns = raw_input('Enter nameserver: ')
	267
6da15cee MR	268	cmd = "echo 'nameserver %s' >> /etc/resolv.conf " % dns
6da15cee MR	269	cmd += '&& cp /etc/nsswitch.conf{,.bak} '
c947c6e2 MR	270	cmd += '&& cp /etc/nsswitch.{dns,conf}'
	271	(out, err) = runcmd(cmd)
	272	if err:
	273	raise RuntimeError(err)
	274	else:
	275	print "Found no unassigned interfaces"
	276	except ParserError as e:
	277	print 'Parse Errror: %s' % e
	278	except RuntimeError as e:
	279	print 'Runtime Error: %s' % e
	280
	281	if __name__ == '__main__':
	282	try:
	283	main()
	284	except KeyboardInterrupt:
	285	sys.stderr.write("\x1b[2J\x1b[H")
	286