# # For a description of the syntax of this configuration file, # see the file kconfig-language.txt in the NuttX tools repository. # config LIBC_NETDB bool default n menu "NETDB Support" config LIBC_GAISTRERROR bool "Enable gai_strerror" default n ---help--- The gai_strerror() function shall return a text string describing an error value for the getaddrinfo() and getnameinfo(). But it can also require a lot of memory. If this option is not selected, gai_strerror() will still exist in the build but it will not decode error values. config NETDB_BUFSIZE int "gethostbyname/gethostbyaddr buffer size" default 128 config NETDB_MAX_IPADDR int "Max number of IP addresses per host" default 2 if NET_IPv4 && NET_IPv6 default 1 ---help--- This setting determines the maximum number of IP addresses stored to the name resolution cache for a given host. menuconfig NETDB_HOSTFILE bool "Network host file support" default n select LIBC_NETDB ---help--- Enable network host table look ups via gethostbyname() and gethostbyaddr(). if NETDB_HOSTFILE config NETDB_HOSTCONF_PATH string "Path to host configuration file" default "/etc/hosts" config NETDB_MAX_ALTNAMES int "Max number of alternate host names" default 4 endif # NETDB_HOSTFILE menuconfig NETDB_DNSCLIENT bool "DNS Name resolution" default n depends on NET && NET_UDP select LIBC_NETDB ---help--- Enable support for the name resolution; Enable network host resolution via gethostbyname(). if NETDB_DNSCLIENT config NETDB_DNSCLIENT_ENTRIES int "Number of DNS resolver entries" default 0 if DEFAULT_SMALL default 8 if !DEFAULT_SMALL range 0 255 ---help--- Number of cached DNS resolver entries. Default: 8. Zero disables all cached name resolutions. Disabling the DNS cache means that each access call to gethostbyname() will result in a new DNS network query. If CONFIG_NETDB_DNSCLIENT_ENTRIES is non-zero, then entries will be cached and if the name mapping can be found in that cache, the network query can be avoid. Of course, this is only useful if you query the same name often and if the IP address of the name is stable. If the IP address can change, then cachin DNS address might have undesirable side-effects (see help for CONFIG_NETDB_DNSCLIENT_LIFESEC). config NETDB_DNSCLIENT_NAMESIZE int "Max size of a cached hostname" default 32 ---help--- The size of a hostname string in the DNS resolver cache is fixed. This setting provides the maximum size of a hostname. Names longer than this will be aliased! Default: 32 config NETDB_DNSCLIENT_LIFESEC int "Life of a DNS cache entry (seconds)" default 3600 ---help--- Cached entries in the name resolution cache older than this will not be used. Default: 1 hour. Zero means that entries will not expire. Small values of CONFIG_NETDB_DNSCLIENT_LIFESEC may result in more network DNS queries; larger values can make a host unreachable for the entire duration of the timeout value. This might happen, for example, if the remote host was assigned a different IP address by a DHCP server. config NETDB_DNSCLIENT_MAXRESPONSE int "Max response size" default 96 ---help--- This setting determines the maximum size of response message that can be received by the DNS resolver. The default is 96 but may need to be larger on enterprise networks (perhaps 176). config NETDB_DNSCLIENT_RECV_TIMEOUT int "DNS receive timeout" default 30 ---help--- This is the timeout value when DNS receives response after dns_send_query, unit: seconds config NETDB_DNSCLIENT_RETRIES int "Number of retries for DNS request" default 3 ---help--- This setting determines how many times resolver retries request until failing. config NETDB_RESOLVCONF bool "DNS resolver file support" default n ---help--- Enable DNS server look ups in resolver file like /etc/resolv.conf. if NETDB_RESOLVCONF config NETDB_RESOLVCONF_PATH string "Path to host configuration file" default "/etc/resolv.conf" config NETDB_RESOLVCONF_NONSTDPORT bool "Non-standard port support" default n ---help--- By default, the resolv.conf file will hold only records like: nameserver xx.xx.xx.xx nameserver xxxx:::::::xxxx The default port of 53 is always assumed. If this option is selected, then OpenBSD style resolv.conf files will be supported. This adds logic for a bracket port notation like: nameserver [xx.xx.xx.xx]:ppppp nameserver [xxxx:::::::xxxx]:ppppp endif # NETDB_RESOLVCONF choice prompt "DNS server address type" default NETDB_DNSSERVER_IPv4 if NET_IPv4 default NETDB_DNSSERVER_IPv6 if !NET_IPv4 && NET_IPv6 default NETDB_DNSSERVER_NOADDR if !NET_IPv4 && !NET_IPv6 depends on !NETDB_RESOLVCONF config NETDB_DNSSERVER_NOADDR bool "No default DNS server address" ---help--- There is not default DNS nameserver address. Application must call dns_add_server() at runtime to add the DNS server address. config NETDB_DNSSERVER_IPv4 bool "IPv4 DNS server address" depends on NET_IPv4 ---help--- An IPv4 default DNS nameserver address will be provided. Application may overwrite this start default server address by calling dns_add_server() at runtime. config NETDB_DNSSERVER_IPv6 bool "IPv6 DNS server address" depends on NET_IPv6 ---help--- An IPv6 default DNS nameserver address will be provided. Application may overwrite this start default server address by calling dns_add_server() at runtime. endchoice # DNS server address type config NETDB_DNSSERVER_IPv4ADDR hex "Target IPv4 address" default 0x0a000001 depends on NETDB_DNSSERVER_IPv4 ---help--- Default DNS server IPv4 address in host byte order. Default value 10.0.0.1. This may be changed via dns_add_nameserver(). if NETDB_DNSSERVER_IPv6 config NETDB_DNSSERVER_IPv6ADDR_1 hex "[0]" default 0xfc00 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the first of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_2 hex "[1]" default 0x0000 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the second of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_3 hex "[2]" default 0x0000 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the third of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_4 hex "[3]" default 0x0000 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the fourth of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_5 hex "[4]" default 0x0000 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the fifth of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_6 hex "[5]" default 0x0000 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the sixth of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_7 hex "[6]" default 0x0000 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the seventh of the 8-values. The default for all eight values is fc00::1. config NETDB_DNSSERVER_IPv6ADDR_8 hex "[7]" default 0x0001 range 0x0 0xffff ---help--- This is the default IP address of the DNS server. This is a 16-bit integer value in host order. Each of the eight values forming the full IPv6 address must be specified individually. This is the last of the 8-values. The default for all eight values is fc00::1. endif # NETDB_DNSSERVER_IPv6 endif # NETDB_DNSCLIENT endmenu # NETDB Support