[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.
    -r, --record	Output create commands to stdout."""

def parse_input():
    options = ()

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

    address = gateway = interface = netmask = nameserver = None
    record = False

    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
	    elif o in ('-r', '--record'):
		record = True
	    else:
		assert False, 'Unhandled option'

	if (record):
	    if not (bool(address) ^ bool(interface)):
		print 'Error: missing options'
		usage()
		sys.exit(2)
	else:
	    if not address or not interface or error:
		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]
		if record:
		    print cmd
		else:
		    runcmd(cmd)
                cmd = 'ipadm create-if %s' % nic[0]
		if record:
		    print cmd
		else:
		    (out, err) = runcmd(cmd)
		    if err:
			raise RuntimeError(err)
                if not ip:
                    # use DHCP
                    cmd = 'ipadm create-addr -T dhcp %s/v4' % nic[0]
		    if record:
			print cmd
		    else:
			(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])
		    if record:
			print cmd
		    else:
			(out, err) = runcmd(cmd)
			if err:
			    raise RuntimeError(err)
                    if gw:
                        cmd = 'route -p add default %s' % gw
			if record:
			    print cmd
			else:
			    (out, err) = runcmd(cmd)
			    if err:
				raise RuntimeError(err)
		if not record:
		    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}'
		    if record:
			print cmd
		    else:
			(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
0b4b929c	9	# source. A copy of the CDDL is also available via the Internet at
6640d1bf MR	10	# http://www.illumos.org/license/CDDL.
6640d1bf MR	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.
db08f9b3 MR	149	-n, --nameserver Nameserver to use. Optional.
db08f9b3 MR	150	-r, --record Output create commands to stdout."""
6640d1bf MR	151
	152	def parse_input():
	153	options = ()
	154
	155	try:
	156	opts, args = getopt.gnu_getopt(sys.argv[1:],
0b4b929c MR	157	'ha:g:i:m:n:r', ['help', 'address=', 'gateway=',
0b4b929c MR	158	'interface=', 'netmask=', 'nameserver=', 'record'])
6640d1bf MR	159	except getopt.GetoptError as err:
	160	print str(err)
	161	usage()
	162	sys.exit(2)
	163
	164	address = gateway = interface = netmask = nameserver = None
0b4b929c	165	record = False
6640d1bf MR	166
	167	if opts:
	168	for o, a in opts:
	169	if o in ('-h', '--help'):
	170	usage()
	171	sys.exit(0)
	172	if o in ('-a', '--address'):
	173	address = a
	174	elif o in ('-g', '--gateway'):
	175	gateway = a
	176	elif o in ('-i', '--interface'):
	177	interface = a
	178	elif o in ('-m', '--netmask'):
	179	netmask = a
	180	elif o in ('-n', '--nameserver'):
	181	nameserver = a
0b4b929c MR	182	elif o in ('-r', '--record'):
0b4b929c MR	183	record = True
6640d1bf MR	184	else:
6640d1bf MR	185	assert False, 'Unhandled option'
e8e90d5a MR	186
	187	if (record):
	188	if not (bool(address) ^ bool(interface)):
	189	print 'Error: missing options'
	190	usage()
	191	sys.exit(2)
	192	else:
	193	if not address or not interface or error:
	194	print 'Error: missing options'
	195	usage()
	196	sys.exit(2)
	197
6640d1bf MR	198	if address == '0':
	199	address = None
	200	if not netmask:
	201	netmask = '24'
	202
	203	options = (interface, address, netmask, gateway, nameserver)
	204
	205	return options
	206
c947c6e2	207	def main():
6640d1bf MR	208	interactive = True
	209
	210	options = parse_input()
	211	if options:
	212	interactive = False
	213
c947c6e2 MR	214	p = Parser()
	215	try:
	216	interfaces = p.parse()
	217	if interfaces:
6640d1bf MR	218	if interactive:
	219	nic = make_menu(interfaces)
	220	else:
f5cdd655 MR	221	nic = options
	222	found = False
	223	for i in interfaces:
	224	if nic[0] == i[0]:
	225	found = True
	226	break
	227	if not found:
	228	err = '%s: No such interface' % nic[0]
	229	raise RuntimeError(err)
c947c6e2	230	if nic:
6640d1bf MR	231	if interactive:
	232	(ip,mask,gw) = get_config()
	233	else:
	234	ip = options[1]
	235	mask = options[2]
	236	gw = options[3]
c947c6e2	237	cmd = 'ipadm delete-if %s' % nic[0]
0b4b929c MR	238	if record:
	239	print cmd
	240	else:
	241	runcmd(cmd)
c947c6e2	242	cmd = 'ipadm create-if %s' % nic[0]
0b4b929c MR	243	if record:
	244	print cmd
	245	else:
	246	(out, err) = runcmd(cmd)
	247	if err:
	248	raise RuntimeError(err)
c947c6e2 MR	249	if not ip:
	250	# use DHCP
	251	cmd = 'ipadm create-addr -T dhcp %s/v4' % nic[0]
0b4b929c MR	252	if record:
	253	print cmd
	254	else:
	255	(out, err) = runcmd(cmd)
	256	if err:
	257	raise RuntimeError(err)
c947c6e2 MR	258	else:
	259	# use STATIC
	260	cmd = 'ipadm create-addr -T static -a %s/%s %s/v4' % (ip, mask, nic[0])
0b4b929c MR	261	if record:
	262	print cmd
	263	else:
	264	(out, err) = runcmd(cmd)
	265	if err:
	266	raise RuntimeError(err)
c947c6e2 MR	267	if gw:
c947c6e2 MR	268	cmd = 'route -p add default %s' % gw
0b4b929c MR	269	if record:
	270	print cmd
	271	else:
	272	(out, err) = runcmd(cmd)
	273	if err:
	274	raise RuntimeError(err)
	275	if not record:
	276	cmd = 'netstat -rn -finet'
	277	(out, err) = runcmd(cmd)
	278	if err:
	279	raise RuntimeError(err)
	280	print 'New route table'
	281	print out
6640d1bf MR	282	if interactive:
	283	dns = raw_input('Configure DNS [n]? ').lower()
	284	else:
	285	dns = options[4]
c947c6e2 MR	286	if not dns or dns == 'n':
	287	pass
	288	else:
6640d1bf MR	289	if interactive:
	290	dns = None
	291	print
	292	while not dns:
	293	dns = raw_input('Enter nameserver: ')
	294
6da15cee MR	295	cmd = "echo 'nameserver %s' >> /etc/resolv.conf " % dns
6da15cee MR	296	cmd += '&& cp /etc/nsswitch.conf{,.bak} '
c947c6e2	297	cmd += '&& cp /etc/nsswitch.{dns,conf}'
0b4b929c MR	298	if record:
	299	print cmd
	300	else:
	301	(out, err) = runcmd(cmd)
	302	if err:
	303	raise RuntimeError(err)
c947c6e2 MR	304	else:
	305	print "Found no unassigned interfaces"
	306	except ParserError as e:
	307	print 'Parse Errror: %s' % e
	308	except RuntimeError as e:
	309	print 'Runtime Error: %s' % e
	310
	311	if __name__ == '__main__':
	312	try:
	313	main()
	314	except KeyboardInterrupt:
	315	sys.stderr.write("\x1b[2J\x1b[H")
	316