This function converts the character string src into a network address structure in the af address family, then copies the network address structure to dst.
inet_pton(3) extends the inet_addr(3) function to support multiple address families, inet_addr(3) is now considered to be deprecated in favor of inet_pton(3). The following address families are currently supported:
Certain legacy hex and octal formats of AF_INET addresses are not supported by inet_pton, which rejects them.
inet_pton returns a negative value and sets errno to EAFNOSUPPORT if af does not contain a valid address family. 0 is returned if src does not contain a character string representing a valid network address in the specified address family. A positive value is returned if the network address was successfully converted.
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