atoa3abz
Convert a string to an address
Usage
#include <abz/atop.h> int atoa(in_addr_t *addr, const char *str);
Libraries
Abz Library (-labz), Debug Library (-ldebug)
Overview
The atoa() function converts a string to an address. The string may either be a hostname or an ip address.
The address is stored in network byte order.
Return value
The atoa() function returns 0 if successful or -1 if some error occurred. Check errno to see what error occurred.
Notes
None of the libabz routines are thread-safe. I'm not planning to change this either! For more information, please see http://threading.2038bug.com/
If the library was compiled without the GETHOSTBYNAME flag, only ip addresses may be specified.
At the time of writing, the glibc library gethostbyname() function had a bug which caused it to resolve some invalid hostnames. In order to detect those cases, the atoa() function also does a reverse lookup using gethostbyaddr() to see if the domain really exist.