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[tor-talk] torsocks logic

Hi there,

there seems to be some discrepancy in torsocks' logic, at least
since August 2016.

In "src/common/utils.c", check_addr returns -1 for non-AF addresses.

So does utils_is_address_ipv4 as it just passes check_addr's
return value.

However, in "src/lib/gethostbyname.c", tsocks_gethostbyname expects
the return value to be a C boolean, so the -1 value from above is
treated as a positive result.

I guess one of the three functions may better be adjusted in order to
ensure more effective operation.

Best regards,

Isidor Zeuner

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