SYNOPSISsocket_getaddrinfo [options...] host service
DESCRIPTIONThis tool provides a convenient command-line wrapper around the getaddrinfo(3) resolver function. It will perform a single lookup and print the returned results in a human-readable form. This is mainly useful when debugging address resolution problems, because it allows inspection of the getaddrinfo(3) behaviour itself, outside of any real program that is trying to use it.
- --host, -H HOST
- Hostname to resolve. If not supplied, will use the first positional argument
- --service, -S SERVICE
- Service name or port number to resolve. If not supplied, will use the second positional argument.
- Restrict to just "AF_INET" (IPv4) results
- Restrict to just "AF_INET6" (IPv6) results
- Restrict to just "SOCK_STREAM" results
- Restrict to just "SOCK_DGRAM" results
- --proto PROTO
- Restrict to just results of the given IP protocol
- Set the "AI_PASSIVE" hint; results will used to bind() and listen() rather than connect()
- Retrive the canonical name for the requested host
- Display a help summary and exit
OUTPUT FORMATEach line of output will be given in a form that indicates the four result fields of "ai_family", "ai_socktype", "ai_protocol" and "ai_addr". The first three are printed in the form of a socket(2) call, either symbolically or numerically, and the latter is printed as a plain string following it. For example
socket(AF_INET , SOCK_STREAM, IPPROTO_TCP) + '127.0.0.1:80'
NOTEUpstream this script is known as "getaddrinfo", but was renamed on Debian.
AUTHORPaul Evans <[email protected]>