Class: Yast::DNSClass
- Inherits:
-
Module
- Object
- Module
- Yast::DNSClass
- Includes:
- Logger
- Defined in:
- src/modules/DNS.rb
Constant Summary collapse
- HOSTNAME_FILE =
"hostname".freeze
- HOSTNAME_PATH =
"/etc/" + HOSTNAME_FILE
Class Method Summary collapse
-
.define_dns_config_method(name) ⇒ Object
Defines a proxy method to DNS configuration.
- .define_hostname_config_method(name) ⇒ Object
Instance Method Summary collapse
-
#default_dhcp_hostname ⇒ Boolean
Default value for #dhcp_hostname based on ProductFeatures and Arch.
-
#GetHostnameFromGetent(line) ⇒ Object
Handles input as one line of getent output.
-
#IsHostLocal(check_host) ⇒ Boolean
Check if hostname or IP address is local computer Used to determine if LDAP server is local (and it should be checked if required schemes are included Calls Read () function before querying any data NOTE: used in yast2-nis-server, yast2-samba-server, yast2-dhcp-server.
- #main ⇒ Object
-
#modified ⇒ Boolean
Determines whether the DNS configuration has been modified.
-
#Read ⇒ Object
Reads DNS settings.
-
#ResolveIP(ip) ⇒ Object
Resolve IP to canonical hostname.
-
#Write(netconfig_update: true) ⇒ Object
Write new DNS and hostname settings Includes Host,NetworkConfig::Write.
Class Method Details
.define_dns_config_method(name) ⇒ Object
Defines a proxy method to DNS configuration
The idea is to keep DNS.hostname, DNS.nameservers, etc. methods so they can still being used in the UI. This mechanism should be removed in the future, when the widgets are adapted to the new API.
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# File 'src/modules/DNS.rb', line 48 def self.define_dns_config_method(name) define_method(name) do yast_dns_config.public_send(name) end define_method("#{name}=") do |value| yast_dns_config.public_send("#{name}=", value) end end |
.define_hostname_config_method(name) ⇒ Object
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# File 'src/modules/DNS.rb', line 58 def self.define_hostname_config_method(name) define_method(name) do yast_hostname_config.public_send(name) end define_method("#{name}=") do |value| yast_hostname_config.public_send("#{name}=", value) end end |
Instance Method Details
#default_dhcp_hostname ⇒ Boolean
Default value for #dhcp_hostname based on ProductFeatures and Arch
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# File 'src/modules/DNS.rb', line 181 def default_dhcp_hostname # ProductFeatures.GetBooleanFeature returns false either if the value is # false or if it's missing, so let's discard the later case calling # ProductFeatures.GetFeature first feature_index = ["globals", "dhclient_set_hostname"] feature = ProductFeatures.GetFeature(*feature_index) # No value for the feature if feature.nil? || (feature.respond_to?(:empty?) && feature.empty?) !Arch.is_laptop else ProductFeatures.GetBooleanFeature(*feature_index) end end |
#GetHostnameFromGetent(line) ⇒ Object
Handles input as one line of getent output. Returns first hostname found on the line (= canonical hostname).
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# File 'src/modules/DNS.rb', line 112 def GetHostnameFromGetent(line) # line is expected same format as is used in /etc/hosts without additional # comments (getent removes comments from the end). # # /etc/hosts line is formatted this way (man 5 hosts): # # <ip address> <canonical hostname> [<alias> ...] # # - field separators are at least one space and/or tab. # - <canonical hostname>, in generic it is "a computer's unique name". In case # of DNS world, <canonical hostname> is FQDN ("A" record), then <hostname> is # <canonical hostname> without domain part. For example: # # foo.example.com. IN A 1.2.3.4 # # <canonical hostname> => foo.example.com # <hostname> => foo # canonical_hostname = Builtins.regexpsub( line, Builtins.sformat("^[%1]+[[:blank:]]+(.*)", IP.ValidChars), "\\1" ) canonical_hostname = String.FirstChunk(canonical_hostname, " \t\n") canonical_hostname = String.CutBlanks(canonical_hostname) if !Hostname.CheckDomain(canonical_hostname) && !Hostname.Check(canonical_hostname) Builtins.y2error( "GetHostnameFromGetent: Invalid hostname detected (%1)", canonical_hostname ) Builtins.y2error("GetHostnameFromGetent: input params - begin") Builtins.y2error("%1", line) Builtins.y2error("GetHostnameFromGetent: input params - end") return "" end Builtins.y2milestone( "GetHostnameFromGetEnt: canonical hostname => (%1)", canonical_hostname ) canonical_hostname end |
#IsHostLocal(check_host) ⇒ Boolean
Check if hostname or IP address is local computer Used to determine if LDAP server is local (and it should be checked if required schemes are included Calls Read () function before querying any data NOTE: used in yast2-nis-server, yast2-samba-server, yast2-dhcp-server
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# File 'src/modules/DNS.rb', line 223 def IsHostLocal(check_host) Read() current_dhcp_data = {} connections = Yast::Lan.yast_config.connections if connections.any?(:dhcp?) || dhcp_hostname current_dhcp_data = dhcp_data log.info("Got DHCP-configured data: #{current_dhcp_data.inspect}") end # FIXME: May not work properly in following situations: # - multiple addresses per interface # - aliases in /etc/hosts # - IPADDR=IP/24 # loopback interface or localhost hostname return true if ["127.0.0.1", "::1", "localhost", "localhost.localdomain"].include?(check_host) ip_addresses = connections.each_with_object([]) do |conn, res| conn.all_ips.each_with_object(res) do |ip, ips| address = ip&.address&.address.to_s ips << address if !address.empty? && !ips.include?(address) end end # IPv4 address if IP.Check4(check_host) return true if ip_addresses.include?(check_host) || current_dhcp_data["ip"] == check_host # IPv6 address elsif IP.Check6(check_host) log.debug("TODO make it similar to IPv4 after other code adapted to IPv6") # short hostname or FQDN elsif check_host.downcase == hostname.to_s.downcase || current_dhcp_data["hostname_short"] == check_host || current_dhcp_data["hostname_fq"] == check_host return true end false end |
#main ⇒ Object
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# File 'src/modules/DNS.rb', line 78 def main Yast.import "UI" textdomain "network" Yast.import "Lan" Yast.import "Arch" Yast.import "Hostname" Yast.import "IP" Yast.import "ProductFeatures" Yast.import "Progress" Yast.import "Service" Yast.import "String" Yast.import "FileUtils" Yast.import "Stage" Yast.import "Report" Yast.include self, "network/routines.rb" Yast.include self, "network/runtime.rb" # Domain Name (not including the host part) @domain = "" # resolver config file location @resolv_conf = "/etc/resolv.conf" # True if DNS is already read @initialized = false end |
#modified ⇒ Boolean
Determines whether the DNS configuration has been modified
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# File 'src/modules/DNS.rb', line 267 def modified system_dns_config.nil? || yast_dns_config != system_dns_config end |
#Read ⇒ Object
It reads all network settings, including DNS ones.
Reads DNS settings
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# File 'src/modules/DNS.rb', line 198 def Read Yast::Lan.Read(:cache) end |
#ResolveIP(ip) ⇒ Object
Resolve IP to canonical hostname
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# File 'src/modules/DNS.rb', line 164 def ResolveIP(ip) getent = SCR.Execute(path(".target.bash_output"), "/usr/bin/getent hosts #{ip.shellescape}") exit_code = Ops.get_integer(getent, "exit", -1) if exit_code != 0 Builtins.y2error("ResolveIP: getent call failed (%1)", getent) return "" end GetHostnameFromGetent(Ops.get_string(getent, "stdout", "")) end |
#Write(netconfig_update: true) ⇒ Object
Update GUI
Write new DNS and hostname settings Includes Host,NetworkConfig::Write
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# File 'src/modules/DNS.rb', line 208 def Write(netconfig_update: true) writer = Y2Network::ConfigWriters::DNSWriter.new writer.write(Yast::Lan.yast_config.dns, Yast::Lan.system_config.dns, netconfig_update: netconfig_update) true end |