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curl_setup: disable IPv6 resolver without getaddrinfo

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Also, use `CURLRES_IPV6` only for actual DNS resolution, not for IPv6
address support. This makes it possible to connect to IPv6 literals by
setting `ENABLE_IPV6` even without `getaddrinfo` support. It also fixes
the CMake build when using the synchronous resolver without
`getaddrinfo` support.

Closes https://github.com/curl/curl/pull/4662
This commit is contained in:
Marcel Raad 2019-11-26 15:06:31 +01:00
parent ab712afa8f
commit 67a08dca27
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4 changed files with 26 additions and 6 deletions
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10
lib/hostip4.c
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@ -131,6 +131,16 @@ Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname,
struct in_addr in;
struct hostent *buf = NULL;
#ifdef ENABLE_IPV6
{
struct in6_addr in6;
/* check if this is an IPv6 address string */
if(Curl_inet_pton(AF_INET6, hostname, &in6) > 0)
/* This is an IPv6 address literal */
return Curl_ip2addr(AF_INET6, &in6, hostname, port);
}
#endif /* ENABLE_IPV6 */
if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
/* This is a dotted IP address 123.123.123.123-style */
return Curl_ip2addr(AF_INET, &in, hostname, port);