getaddrinfo () و getnameinfo () دو تابع در استاندارد پازیکس هستند که برای تبدیل کردن اسامی میزبان (به انگلیسی: hostname) و آدرسهای آیپی، از فرم متنی قابل فهم برای انسان، به قالب دودویی ساختارمند که برای رایانه قابل فهم است (و برعکس)، مورد استفاده قرار میگیرند.
The RFC 2553 functions getaddrinfo and getnameinfo provide an abstracted way to convert between a pair of host name/service name and socket addresses, or vice versa. getaddrinfo converts names into a set of arguments to pass to the socket() and connect() syscalls, and getnameinfo converts a socket address back into its host name/service name pair. Socket applications often need to convert hostnames like google.com to their corresponding ip address. This is done through dns requests. The socket api in linux provides functions like gethostbyname and getaddrinfo that can be used to perform the dns requests and get the ip address. gethostbyname The first method uses the traditional gethostbyname function to Sourceware Bugzilla – Bug 12377 getaddrinfo() with AI_ADDRCONFIG won't suppress AAAA DNS queries when only IPv6 loopback and link-local addresses are present Last modified: 2016-03-17 13:59:53 UTC The getaddrinfo() function combines the functionality provided by the gethostbyname(3) and getservbyname(3) functions into a single interface, but unlike the latter functions, getaddrinfo() is reentrant and allows programs to eliminate IPv4-versus-IPv6 dependencies. The addrinfo structure used by getaddrinfo() contains the following fields
def is_valid_ip(ip): """Returns true if the given string is a well-formed IP address. Supports IPv4 and IPv6. """ if not ip or '\x00' in ip: # getaddrinfo resolves empty strings to localhost, and truncates # on zero bytes.
A. getaddrinfo () and getnameinfo () can be used for clients and servers alike, just as gethostbyname () and gethostbyaddr () can be. They are just host/address resolution functions, how the resolved values get used is up to the calling app to decide. B. client code using getaddrinfo () would look something like this: getaddrinfo() function in Python | Pythontic.com Function Overview: If we know a network service by host name like example.org or the IP address of the network service either in form of IPv4 or IPv6 along with the port number of the network service, getaddrinfo () will return a list of tuples containing information about … getaddrinfo() - BlackBerry Native
getaddrinfo: Name or service not known (SocketError) #1623. sanjibukai opened this issue Jul 26, 2018 · 3 comments Comments. Copy link Quote reply
getaddrinfo - man pages section 3: Networking Library The getaddrinfo() function translates the name of a service location (for example, a host name) and/or a service name and returns a set of socket addresses and associated information to be used in creating a socket with which to address the specified service. ip address using getaddrinfo() - C Board Jul 06, 2012