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hostip: support wildcard hosts

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This adds support for wildcard hosts in CURLOPT_RESOLVE. These are
try-last so any non-wildcard entry is resolved first. If specified,
any host not matched by another CURLOPT_RESOLVE config will use this
as fallback.

Example send a.com to 10.0.0.1 and everything else to 10.0.0.2:
  curl --resolve *:443:10.0.0.2 --resolve a.com:443:10.0.0.1 \
       https://a.com https://b.com

This is probably quite similar to using:
  --connect-to a.com:443:10.0.0.1:443 --connect-to :443:10.0.0.2:443

Closes #3406
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
This commit is contained in:
Claes Jakobsson 2018-12-27 14:23:13 +01:00 • committed by Daniel Gustafsson
parent ba266b3ed7
commit d8cae791f4
5 changed files with 94 additions and 1 deletions
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6
docs/cmdline-opts/resolve.d
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@ -11,6 +11,10 @@ the number used for the specific protocol the host will be used for. It means
you need several entries if you want to provide address for the same host but
different ports.
By specifying '*' as host you can tell curl to resolve any host and specific
port pair to the specified address. Wildcard is resolved last so any --resolve
with a specific host and port will be used first.
The provided address set by this option will be used even if --ipv4 or --ipv6
is set to make curl use another IP version.
@ -18,4 +22,6 @@ Support for providing the IP address within [brackets] was added in 7.57.0.
Support for providing multiple IP addresses per entry was added in 7.59.0.
Support for resolving with wildcard was added in 7.64.0.
This option can be used many times to add many host names to resolve.