From patchwork Mon May 16 08:38:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Couder X-Patchwork-Id: 12850403 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBD55C433EF for ; Mon, 16 May 2022 08:39:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238562AbiEPIjP (ORCPT ); Mon, 16 May 2022 04:39:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231559AbiEPIjL (ORCPT ); Mon, 16 May 2022 04:39:11 -0400 Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4EC1CE0D1 for ; Mon, 16 May 2022 01:39:09 -0700 (PDT) Received: by mail-wr1-x42f.google.com with SMTP id a5so15662833wrp.7 for ; Mon, 16 May 2022 01:39:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=GYKNFgyzOSnscfbsVVJLXAG58PzEbOPA2lV4+2nL5R8=; b=ZEpKPr/wwvyRSAdQH3U9J0tCKXSYr5BThDhqYDyvFoHbJBz8vtK2TsYqB9qi99ircA UqG1oD6v+CDHrHMY693NAztLpROhQO+hq3bXM0hSIHf/6TVbAEeVjeBXQIxIGfmNJn3e DibMpOj8yIgFlG5E2jNlzozWunOEHee9zFsxRoiRau4TKfWrUaGLTmjt/pz7fLkY6nER evMjlFvWD3BWQgugW4bDCJQAS69HTm48dxkF8Zuvio6Ft6jIFo0HhY4WGsq8j+I3m0fe nJuepnvjm/3/boK4OIt5YXGIoNKjWoUiuATlrW7VjtAEzYrME9Ck3RNZHdPqLwkXWm24 4W7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=GYKNFgyzOSnscfbsVVJLXAG58PzEbOPA2lV4+2nL5R8=; b=z0tbF+mMsY8BLzSQSKpQTBWvb09Q9pP0DBDkGZBxZ4+ptgMlxyr1qjXk87A1IJWT8y ZwIy4PIBLd9y97AYr73vYSl/HO1eGo1k2+JS6tiLw7OAGZ+cn7WITJ6tvh6WZ09d9Q7G QU6NovBwFFn4X2UpTYvl/nUitmq2xvpjlZPS9OomL3hRDcCaci1+wgtEn7CBBW2fgQhN dKjyfqT8kKCQDbxNXTqYJfAaiD3KCsueOnX3o7QYrzWj8q1hvGsikR7NoNNFfSIP8tfh Fp426FZpuduNq0fkirDWVvfFrvGvkwKde9c3oouGX7MQlwiTouxW0z2JLyTuKwuue+HW fO/g== X-Gm-Message-State: AOAM533Ph3QmGhchQe+epj1z1KX67h8H6d+ziF9gsYCKO/QacgSEPmOp 9SlJnkItB7bGlJBjv8urEaFzH2iXK14= X-Google-Smtp-Source: ABdhPJy/LbJYOAz1Rq/lymcFNgevgcSPZ6Dm0S3r8Q2O4rbGptUTbOd0YKZsTaD5qmniEpEkO3VXsg== X-Received: by 2002:adf:fb12:0:b0:20c:79b2:a200 with SMTP id c18-20020adffb12000000b0020c79b2a200mr13518206wrr.617.1652690347178; Mon, 16 May 2022 01:39:07 -0700 (PDT) Received: from localhost.localdomain ([2001:861:3005:2510:8d3:1902:531f:83c1]) by smtp.gmail.com with ESMTPSA id i10-20020a05600c354a00b003942a244f37sm14359720wmq.16.2022.05.16.01.39.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 May 2022 01:39:06 -0700 (PDT) From: Christian Couder X-Google-Original-From: Christian Couder To: git@vger.kernel.org Cc: Junio C Hamano , Christian Couder , Derrick Stolee , Carlo Arenas , Patrick Steinhardt Subject: [PATCH v4] http: add custom hostname to IP address resolutions Date: Mon, 16 May 2022 10:38:51 +0200 Message-Id: <20220516083851.202057-1-chriscool@tuxfamily.org> X-Mailer: git-send-email 2.36.1.75.ga27ebf5988 In-Reply-To: <20220509153834.485871-1-chriscool@tuxfamily.org> References: <20220509153834.485871-1-chriscool@tuxfamily.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Libcurl has a CURLOPT_RESOLVE easy option that allows the result of hostname resolution in the following format to be passed: [+]HOST:PORT:ADDRESS[,ADDRESS] This way, redirects and everything operating against the HOST+PORT will use the provided ADDRESS(s). The following format is also allowed to stop using hostname resolutions that have already been passed: -HOST:PORT See https://curl.se/libcurl/c/CURLOPT_RESOLVE.html for more details. Let's add a corresponding "http.curloptResolve" config option that takes advantage of CURLOPT_RESOLVE. Each value configured for the "http.curloptResolve" key is passed "as is" to libcurl through CURLOPT_RESOLVE, so it should be in one of the above 2 formats. This keeps the implementation simple and makes us consistent with libcurl's CURLOPT_RESOLVE, and with curl's corresponding `--resolve` command line option. The implementation uses CURLOPT_RESOLVE only in get_active_slot() which is called by all the HTTP request sending functions. Signed-off-by: Christian Couder --- Changes since v3: - Use gitbogusexamplehost.invalid instead of gitbogusexamplehost.com in the test. - Rebased on top of master at 277cf0bc36 (second 0th batch of topics from the previous cycle, 2022-05-11). Range diff: 1: 3d689f8a6f ! 1: a27ebf5988 http: add custom hostname to IP address resolutions @@ t/t5551-http-fetch-smart.sh: test_expect_success 'client falls back from v2 to v ' +test_expect_success 'passing hostname resolution information works' ' -+ BOGUS_HOST=gitbogusexamplehost.com && ++ BOGUS_HOST=gitbogusexamplehost.invalid && + BOGUS_HTTPD_URL=$HTTPD_PROTO://$BOGUS_HOST:$LIB_HTTPD_PORT && + test_must_fail git ls-remote "$BOGUS_HTTPD_URL/smart/repo.git" >/dev/null && + git -c "http.curloptResolve=$BOGUS_HOST:$LIB_HTTPD_PORT:127.0.0.1" ls-remote "$BOGUS_HTTPD_URL/smart/repo.git" >/dev/null Documentation/config/http.txt | 16 ++++++++++++++++ http.c | 18 ++++++++++++++++++ t/t5551-http-fetch-smart.sh | 7 +++++++ 3 files changed, 41 insertions(+) diff --git a/Documentation/config/http.txt b/Documentation/config/http.txt index 7003661c0d..179d03e57b 100644 --- a/Documentation/config/http.txt +++ b/Documentation/config/http.txt @@ -98,6 +98,22 @@ http.version:: - HTTP/2 - HTTP/1.1 +http.curloptResolve:: + Hostname resolution information that will be used first by + libcurl when sending HTTP requests. This information should + be in one of the following formats: + + - [+]HOST:PORT:ADDRESS[,ADDRESS] + - -HOST:PORT + ++ +The first format redirects all requests to the given `HOST:PORT` +to the provided `ADDRESS`(s). The second format clears all +previous config values for that `HOST:PORT` combination. To +allow easy overriding of all the settings inherited from the +system config, an empty value will reset all resolution +information to the empty list. + http.sslVersion:: The SSL version to use when negotiating an SSL connection, if you want to force the default. The available and default version diff --git a/http.c b/http.c index 229da4d148..8beacb95cc 100644 --- a/http.c +++ b/http.c @@ -128,6 +128,8 @@ static struct curl_slist *pragma_header; static struct curl_slist *no_pragma_header; static struct string_list extra_http_headers = STRING_LIST_INIT_DUP; +static struct curl_slist *host_resolutions; + static struct active_request_slot *active_queue_head; static char *cached_accept_language; @@ -393,6 +395,18 @@ static int http_options(const char *var, const char *value, void *cb) return 0; } + if (!strcmp("http.curloptresolve", var)) { + if (!value) { + return config_error_nonbool(var); + } else if (!*value) { + curl_slist_free_all(host_resolutions); + host_resolutions = NULL; + } else { + host_resolutions = curl_slist_append(host_resolutions, value); + } + return 0; + } + if (!strcmp("http.followredirects", var)) { if (value && !strcmp(value, "initial")) http_follow_config = HTTP_FOLLOW_INITIAL; @@ -1131,6 +1145,9 @@ void http_cleanup(void) curl_slist_free_all(no_pragma_header); no_pragma_header = NULL; + curl_slist_free_all(host_resolutions); + host_resolutions = NULL; + if (curl_http_proxy) { free((void *)curl_http_proxy); curl_http_proxy = NULL; @@ -1211,6 +1228,7 @@ struct active_request_slot *get_active_slot(void) if (curl_save_cookies) curl_easy_setopt(slot->curl, CURLOPT_COOKIEJAR, curl_cookie_file); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header); + curl_easy_setopt(slot->curl, CURLOPT_RESOLVE, host_resolutions); curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, NULL); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, NULL); diff --git a/t/t5551-http-fetch-smart.sh b/t/t5551-http-fetch-smart.sh index f92c79c132..b9351a732f 100755 --- a/t/t5551-http-fetch-smart.sh +++ b/t/t5551-http-fetch-smart.sh @@ -567,4 +567,11 @@ test_expect_success 'client falls back from v2 to v0 to match server' ' grep symref=HEAD:refs/heads/ trace ' +test_expect_success 'passing hostname resolution information works' ' + BOGUS_HOST=gitbogusexamplehost.invalid && + BOGUS_HTTPD_URL=$HTTPD_PROTO://$BOGUS_HOST:$LIB_HTTPD_PORT && + test_must_fail git ls-remote "$BOGUS_HTTPD_URL/smart/repo.git" >/dev/null && + git -c "http.curloptResolve=$BOGUS_HOST:$LIB_HTTPD_PORT:127.0.0.1" ls-remote "$BOGUS_HTTPD_URL/smart/repo.git" >/dev/null +' + test_done