remote-http(s): support SOCKS proxies

With this patch we properly support SOCKS proxies, configured e.g. like
this:

	git config http.proxy socks5://192.168.67.1:32767

Without this patch, Git mistakenly tries to use SOCKS proxies as if they
were HTTP proxies, resulting in a error message like:

	fatal: unable to access 'http://.../': Proxy CONNECT aborted

This patch was required to work behind a faulty AP and scraped from
http://stackoverflow.com/questions/15227130/#15228479 and guarded with
an appropriate cURL version check by Johannes Schindelin.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/http.c b/http.c
index 9448c50f0f9ae159aa73feae6d980335265c168f..be3f5fb7def9bf20fee166407590bf989ea2f2fd 100644 (file)
--- a/http.c
+++ b/http.c
@@ -424,6 +424,17 @@ 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"))
+                       curl_easy_setopt(result,
+                               CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
+               else if (starts_with(curl_http_proxy, "socks4a"))
+                       curl_easy_setopt(result,
+                               CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A);
+               else if (starts_with(curl_http_proxy, "socks"))
+                       curl_easy_setopt(result,
+                               CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
+#endif
        }
 #if LIBCURL_VERSION_NUM >= 0x070a07
        curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);