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http: differentiate socks5:// and socks5h://

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Felix Ruess <felix.ruess@gmail.com> noticed that with configuration

    $ git config --global 'http.proxy=socks5h://127.0.0.1:1080'

connections to remote sites time out, waiting for DNS resolution.

The logic to detect various flavours of SOCKS proxy and ask the
libcurl layer to use appropriate one understands the proxy string
that begin with socks5, socks4a, etc., but does not know socks5h,
and we end up using CURLPROXY_SOCKS5.  The correct one to use is
CURLPROXY_SOCKS5_HOSTNAME.

https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html says

  ..., socks5h:// (the last one to enable socks5 and asking the
  proxy to do the resolving, also known as CURLPROXY_SOCKS5_HOSTNAME
  type).

which is consistent with the way the breakage was reported.

Tested-by: Felix Ruess <felix.ruess@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2016-04-08 12:16:06 -07:00
parent e46579643d
commit 87f8a0b279
1 changed files with 4 additions and 1 deletions
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5
http.c
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@ -466,7 +466,10 @@ static CURL *get_curl_handle(void)
if (curl_http_proxy) {
curl_easy_setopt(result, CURLOPT_PROXY, curl_http_proxy);
#if LIBCURL_VERSION_NUM >= 0x071800
if (starts_with(curl_http_proxy, "socks5"))
if (starts_with(curl_http_proxy, "socks5h"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME);
else if (starts_with(curl_http_proxy, "socks5"))
curl_easy_setopt(result,
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
else if (starts_with(curl_http_proxy, "socks4a"))