diff options
Diffstat (limited to 'kpov_judge')
| -rw-r--r-- | kpov_judge/tasks/dhcp_dns_predefined_ip/task.py | 115 |
1 files changed, 43 insertions, 72 deletions
diff --git a/kpov_judge/tasks/dhcp_dns_predefined_ip/task.py b/kpov_judge/tasks/dhcp_dns_predefined_ip/task.py index 01a9941..b37f0ff 100644 --- a/kpov_judge/tasks/dhcp_dns_predefined_ip/task.py +++ b/kpov_judge/tasks/dhcp_dns_predefined_ip/task.py @@ -5,13 +5,7 @@ instructions = { 'si':u""" -Ustvari tri navidezne računalnike. Za enega (SimpleArbiter) uporabi sliko diska simpleArbiterGW. -Na drugega (DHCP_server) postavi strežnika DHCP in DNS. Za gateway uporabi IP naslov simple arbiterja. -Poskrbi, da bo preostali računalnik (DHCP_client) dobil naslov {Client_IP}. - -Poskrbi, da bo DNS strežnik za domeno test.net vrnil naslov {HOSTNAME_X_IP}. -DHCP_server naj za DNS strežnik uporabi {DNS_NM}. -DHCP_client naj za DNS strežnik uporabi {DNS_static}. +Ustvari tri navidezne računalnike. Za enega (SimpleArbiter) uporabi sliko diska simpleArbiter. Na drugega (DHCP_server) postavi strežnika DHCP in DNS in poskrbi, da ta računalnik dobi IP naslov {IP_NM}. Poskrbi, da bo preostali računalnik (DHCP_client) dobil naslov {IP_static}, ki mu ga določi DHCP strežnik. Poskrbi še,da DNS strežnik vrne za hostname {HOSTNAME_X} IP naslov {IP_X}. """ } @@ -46,7 +40,7 @@ computers = { }, 'SimpleArbiter': { 'disks': [ - { 'name': 'simpleArbiterGW', + { 'name': 'simpleArbiterDhcp', # attempt automount }, #{ 'name': 'CDROM', @@ -63,99 +57,76 @@ computers = { networks = { 'net1': {'public': False}, 'test-net': {'public': True} } params_meta = { - 'IP_NM': {'descriptions': {'si': 'Naslov maliNetworkManager'}, 'w': False, 'public':True, 'type': 'IP', 'generated': True}, - 'DNS_NM': {'descriptions': {'si': 'DNS za maliNetworkManager'}, 'w': False, 'public':True, 'type': 'IP', 'generated': True}, - 'IP_static': {'descriptions': {'si': 'Naslov maliBrezNetworkManager'}, 'w': False, 'public': True, 'type': 'IP', 'generated': True}, - 'DNS_static': {'descriptions': {'si': 'DNS za maliBrezNetworkManager'}, 'w': False, 'public': True, 'type': 'IP', 'generated': True}, - 'HOSTNAME_X_IP': {'descriptions': {'si': 'Naslov HOSTNAME_X'}, 'w': False, 'public':True, 'type': 'IP', 'generated': True}, - 'Client_IP': {'descriptions': {'si': 'Naslov za DHCP_Client'}, 'w': False, 'public':True, 'type': 'IP', 'generated': True}, + 'IP_NM': {'descriptions': {'si': 'IP naslov DHCP streznika'}, 'w': False, 'public':True, 'type': 'IP', 'generated': True}, + 'IP_static': {'descriptions': {'si': 'IP naslov DHCP klienta'}, 'w': False, 'public': True, 'type': 'IP', 'generated': True}, + 'MAC_client': {'descriptions': {'si': 'MAC naslov DHCP klienta'}, 'w': True, 'public': True, 'type': 'MAC', 'generated': False}, + 'HOSTNAME_X': {'descriptions': {'si': 'Hostname za DNS'}, 'w': False, 'public': True, 'type': 'short_text', 'generated': True}, + 'IP_X': {'descriptions': {'si': 'Naslov, ki ga vrne DNS'}, 'w': False, 'public': False, 'type': 'IP', 'generated': True}, } -def task(IP_NM, DNS_NM, IP_static, DNS_static, HOSTNAME_X_IP, Client_IP, MAC_BOOT): +def task(IP_NM, IP_static, MAC_client, HOSTNAME_X): from pexpect import pxssh - import pexpect + #import pexpect results = dict() peer_user = 'student' peer_passwd = 'vaje' sA = pxssh.pxssh() sB = pxssh.pxssh() + #prijavimo se na streznik (IP_NM je IP nalov streznika) sA.login(IP_NM, peer_user, peer_passwd) + #prijavimo se na klienta (IP_static je IP naslov klienta) sB.login(IP_static, peer_user, peer_passwd) - # sA - # make sure NM is not handling eth0 - sA.sendline('nmcli -c no d') + # tukaj dobimo podatke iz streznika ce je res klientu dodelil pravi naslov + # mogoce tail -5 ni potreben ampak sem razmisljal da bi bilo hitreje, ce bi preverjali samo + # zadnjih 5 DHCPACK vnosov + sA.sendline('sudo grep DHCPACK /var/log/syslog | tail -5') + # in ker gre za sudo ukaz posljemo se geslo uporabnika v tem primeru gre za uporabnika student + sA.sendline(peer_passwd) sA.prompt() - results['NM_nmcli'] = sA.before - results['NM_nslookup'] = sA.run('nslookup www.arnes.si') - # sB - # check whether NM is handling eth0 - sB.sendline('nmcli -c no d') + results['client_IP'] = sA.before + # tukaj dobimo podatke, ce je na IP_NM naslovu res postavljen DHCP streznik + sB.sendline('sudo dhcping -s {} -h {} -c {}'.format(IP_NM, MAC_client, IP_static)) + sB.sendline(peer_passwd) + sB.prompt() + results['dhcp'] = sB.before + # tukaj pa dobimo podatek, ce je IP, ki ga vraca DNS streznik za HOSTNAME_X pravilen + sB.sendline('nslookup {}'.format(HOSTNAME_X)) sB.prompt() - results['static_nmcli'] = sB.before - results['static_nslookup'] = sB.run('nslookup www.arnes.si') - # test the DNS server - results['NM_dns_test'] = sA.run('nslookup test.net 127.0.0.1') - # test DHCP - results['client_ip'] = sB.run('ifconfig') + results['dns_hostname'] = sB.before sA.logout() sB.logout() return results + def gen_params(user_id, params_meta): params = dict() - r = random.Random(user_id) - # IP_NM, DNS_NM, IP_static, DNS_static) - dns_servers = ['193.2.1.66', '193.2.1.72', '8.8.8.8', '8.8.4.4', '208.67.222.222', '208.67.220.220'] + r = random.Random(user_id+"bla") net = kpov_random_helpers.IPv4_subnet_gen(r, '172.23.128.0/18', 24) - params['DNS_NM'] = r.choice(dns_servers) - params['IP_NM'], params['IP_static'], params['HOSTNAME_X_IP'], params['Client_IP'] = kpov_random_helpers.IPv4_addr_gen(r, net, 4) - params['DNS_static'] = r.choice(dns_servers) + params['IP_NM'], params['IP_static'], params['IP_X'] = kpov_random_helpers.IPv4_addr_gen(r, net, 3) + params['HOSTNAME_X'] = "".join([r.choice('ABCDEFGHIJKLMNPRSTUVZ') for i in xrange(5)]) return params def task_check(results, params): import re score = 0 hints = [] - if results['NM_nslookup'].find('Server:\t\t{0}\r'.format(params['DNS_NM'])) > -1: - score += 2 - else: - hints += ["NM DNS wrong"] - if results['static_nslookup'].find('Server:\t\t{0}\r'.format(params['DNS_static'])) > -1: - score += 2 - else: - hints += ["Static DNS wrong"] - if re.search(r'e(th0|np0s3|ns3) +ethernet +connected', results['NM_nmcli']): - score += 2 + # ker je v results[dhcp] shranjen ukaz za dobivanje teh podatkov, kot tudi odgovor streznika + # mora biti stevilo pojavitev streznikovega IP naslova (IP_NM) enako ali vecje od 2 + # enkrat se zagotovo pojavi v ukazu in nato se mora vsaj se enkrat pojaviti tudi v odgovoru + if results['dhcp'].count(params['IP_NM']) >= 2: + score += 2 else: - hints += ['nmcli incorrect'] - if re.search(r'e(th0|np0s3|ns3) +ethernet +unmanaged', results['static_nmcli']): - score += 2 + hints += ["dhcp wrong"] + if results['client_IP'].find("DHCPACK on " + params['IP_static'] + " to " + params['MAC_client']) >= 0: + score += 3 else: - hints += ['nmcli on malibrez incorrect'] - if results['client_ip'].find('inet {0}'.format(params['Client_IP'])) > -1: - score += 1 + hints += ["client IP wrong"] + if results['dns_hostname'].find(params['IP_X']) >= 0: + score += 5 else: - hints += ['DHCP_Client DHCP incorrect'] - if results['NM_dns_test'].find('Address: {0}'.format(params['HOSTNAME_X_IP'])) > -1: - score += 1 - else: - hints += ['DNS query wrong'] + hints += ['dns wrong'] return score, hints def prepare_disks(templates, task_params, global_params): - d = templates['simpleArbiterGW'] - s = """auto lo -iface lo inet loopback - -auto ens3 -iface ens3 inet dhcp - -auto enp0s3 -iface enp0s3 inet dhcp - -auto enp0s8 -iface enp0s8 inet dhcp -""" - d.write("/etc/network/interfaces", s) - write_default_config(templates['simpleArbiterGW'], global_params) + write_default_config(templates['simpleArbiterDhcp'], global_params) |