From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dormouse.elm.relay.mailchannels.net (dormouse.elm.relay.mailchannels.net [23.83.212.50]) by sourceware.org (Postfix) with ESMTPS id 813983857C47 for ; Mon, 14 Mar 2022 09:49:51 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 813983857C47 X-Sender-Id: dreamhost|x-authsender|siddhesh@gotplt.org Received: from relay.mailchannels.net (localhost [127.0.0.1]) by relay.mailchannels.net (Postfix) with ESMTP id 2C4A66213E7 for ; Mon, 14 Mar 2022 09:49:50 +0000 (UTC) Received: from pdx1-sub0-mail-a305.dreamhost.com (unknown [127.0.0.6]) (Authenticated sender: dreamhost) by relay.mailchannels.net (Postfix) with ESMTPA id B8C7B620175 for ; Mon, 14 Mar 2022 09:49:34 +0000 (UTC) ARC-Seal: i=1; s=arc-2022; d=mailchannels.net; t=1647251389; a=rsa-sha256; cv=none; b=v1IzCC3C5H7mjMxnZ3ijStYToS005vKj0ZdjNJN8RxMLhiWKg1qg6P2u14vi4l8YbA4YHL TA+Z9vE4EIm5stRiHWmGN5Y+6K63IV1P00p9rl8IHH7KP6B5XDlUlYZJcE7BDdSwPkTI0F gsXnOx9qT4r0YjajDt0+FIkyhxRqf3qN1GwKK/+mVXzqTFsPZoRxYFBirKwEeajTRkYbC3 v/0nCvL7AAZ2ThMD0WsrRnUKntZ98lVcMSmDtfaCOOQ4EPVabNtBrub0tko4OcJFJ2flFc AKVOr9cRpAePO5zzR7qgg6r26SuyASHb3PaZyB3rzE+zpF3Fvg5imDMY/TGuwg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=mailchannels.net; s=arc-2022; t=1647251389; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RuA9EHfK5WUS5bQpLuBCuuwhGjxgPKKk01CKZc90OYw=; b=sODeo7DtIulIG+yPvHXpfO3+MZJECTJHCOdv8wUjvkQYsjeRbhNIedgKub5bbtkbHdXvfX wBs5wz3M+ud4i0bKHl+3dEgXHWsYHmd4ZWwac0HUz7SWt8EvX7O8O0H+ZwSeGojAGvRg6x 9hXQYjMJ0o/XbVPWRSEC3JLN2V1BZSPlMP/XDh0UrbuyCFL9CZNoJHmLwJicT/5TvJtq+k oNSzMiqYkNJikBtIR1qhLGR0khn33wJ0LylPxuXVNVLxS91Se7fsh9CgsIDiAELUeCRYQ/ e0Y55iFZL+/qp/ZlqNkaiTiEOkSRAYuIn6O7bak6L5y4fr5jSQISqwMCRAvwUw== ARC-Authentication-Results: i=1; rspamd-c9cb649d9-qb552; auth=pass smtp.auth=dreamhost smtp.mailfrom=siddhesh@sourceware.org X-Sender-Id: dreamhost|x-authsender|siddhesh@gotplt.org Received: from pdx1-sub0-mail-a305.dreamhost.com (pop.dreamhost.com [64.90.62.162]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384) by 100.119.141.198 (trex/6.5.3); Mon, 14 Mar 2022 09:49:50 +0000 X-MC-Relay: Neutral X-MailChannels-SenderId: dreamhost|x-authsender|siddhesh@gotplt.org X-MailChannels-Auth-Id: dreamhost X-Obese-Abaft: 2d1ff52665808a32_1647251389988_2954768209 X-MC-Loop-Signature: 1647251389988:3387924213 X-MC-Ingress-Time: 1647251389988 Received: from rhbox.redhat.com (unknown [106.220.192.183]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: siddhesh@gotplt.org) by pdx1-sub0-mail-a305.dreamhost.com (Postfix) with ESMTPSA id 4KHBZR2cmcz1QK for ; Mon, 14 Mar 2022 02:49:02 -0700 (PDT) From: Siddhesh Poyarekar To: libc-alpha@sourceware.org Subject: [PATCH v2 10/12] gaih_inet: split loopback lookup into its own function Date: Mon, 14 Mar 2022 15:18:33 +0530 Message-Id: <20220314094835.1159523-11-siddhesh@sourceware.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220314094835.1159523-1-siddhesh@sourceware.org> References: <20220308100717.1006126-1-siddhesh@sourceware.org> <20220314094835.1159523-1-siddhesh@sourceware.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-1169.8 required=5.0 tests=BAYES_00, GIT_PATCH_0, JMQ_SPF_NEUTRAL, KAM_DMARC_NONE, KAM_DMARC_STATUS, KAM_SHORT, RCVD_IN_BL_SPAMCOP_NET, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NEUTRAL, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Mar 2022 09:49:53 -0000 Flatten the condition nesting and replace the alloca for RET.AT/ATR with a single array LOCAL_AT[2]. This gets rid of alloca and alloca accounting. `git diff -b` is probably the best way to view this change since much of the diff is whitespace changes. Signed-off-by: Siddhesh Poyarekar --- sysdeps/posix/getaddrinfo.c | 127 ++++++++++++++++++------------------ 1 file changed, 62 insertions(+), 65 deletions(-) diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c index e71f21f3c9..3aeeb0d1e0 100644 --- a/sysdeps/posix/getaddrinfo.c +++ b/sysdeps/posix/getaddrinfo.c @@ -1002,6 +1002,32 @@ try_simple_gethostbyname (const char *name, const struct addrinfo *req, return -EAI_NODATA; } +/* Add local address information into RES. RES->AT is assumed to have enough + space for two tuples and is zeroed out. */ + +static void +get_local_addresses (const struct addrinfo *req, struct gaih_result *res) +{ + struct gaih_addrtuple *atr = res->at; + if (req->ai_family == AF_UNSPEC) + res->at->next = res->at + 1; + + if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) + { + res->at->family = AF_INET6; + if ((req->ai_flags & AI_PASSIVE) == 0) + memcpy (res->at->addr, &in6addr_loopback, sizeof (struct in6_addr)); + atr = res->at->next; + } + + if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) + { + atr->family = AF_INET; + if ((req->ai_flags & AI_PASSIVE) == 0) + atr->addr[0] = htonl (INADDR_LOOPBACK); + } +} + static int gaih_inet (const char *name, const struct gaih_service *service, const struct addrinfo *req, struct addrinfo **pai, @@ -1012,10 +1038,6 @@ gaih_inet (const char *name, const struct gaih_service *service, const char *orig_name = name; - /* Reserve stack memory for the scratch buffer in the getaddrinfo - function. */ - size_t alloca_used = sizeof (struct scratch_buffer); - int rc; if ((rc = get_servtuples (service, req, st, tmpbuf)) != 0) return rc; @@ -1025,76 +1047,51 @@ gaih_inet (const char *name, const struct gaih_service *service, int result = 0; struct gaih_result res = {0}; - if (name != NULL) + struct gaih_addrtuple local_at[2] = {0}; + + res.at = local_at; + + if (__glibc_unlikely (name == NULL)) { - if (req->ai_flags & AI_IDN) - { - char *out; - result = __idna_to_dns_encoding (name, &out); - if (result != 0) - return -result; - name = out; - malloc_name = true; - } + get_local_addresses (req, &res); + goto process_list; + } - res.at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used); - res.at->scopeid = 0; - res.at->next = NULL; + if (req->ai_flags & AI_IDN) + { + char *out; + result = __idna_to_dns_encoding (name, &out); + if (result != 0) + return -result; + name = out; + malloc_name = true; + } - if ((result = text_to_binary_address (name, req, &res)) != 0) - goto free_and_return; - else if (res.at != NULL) - goto process_list; + if ((result = text_to_binary_address (name, req, &res)) != 0) + goto free_and_return; + else if (res.at != NULL) + goto process_list; - if ((result = try_simple_gethostbyname (name, req, tmpbuf, &res)) != 0) - goto free_and_return; - else if (res.at != NULL) - goto process_list; + if ((result = try_simple_gethostbyname (name, req, tmpbuf, &res)) != 0) + goto free_and_return; + else if (res.at != NULL) + goto process_list; #ifdef USE_NSCD - if ((result = get_nscd_addresses (name, req, &res)) != 0) - goto free_and_return; - else if (res.at != NULL) - goto process_list; + if ((result = get_nscd_addresses (name, req, &res)) != 0) + goto free_and_return; + else if (res.at != NULL) + goto process_list; #endif - if ((result = get_nss_addresses (name, req, tmpbuf, &res)) != 0) - goto free_and_return; - else if (res.at != NULL) - goto process_list; - - /* None of the lookups worked, so name not found. */ - result = -EAI_NONAME; - goto free_and_return; - } - else - { - struct gaih_addrtuple *atr; - atr = res.at = alloca_account (sizeof (struct gaih_addrtuple), - alloca_used); - memset (res.at, '\0', sizeof (struct gaih_addrtuple)); - - if (req->ai_family == AF_UNSPEC) - { - res.at->next = __alloca (sizeof (struct gaih_addrtuple)); - memset (res.at->next, '\0', sizeof (struct gaih_addrtuple)); - } - - if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) - { - res.at->family = AF_INET6; - if ((req->ai_flags & AI_PASSIVE) == 0) - memcpy (res.at->addr, &in6addr_loopback, sizeof (struct in6_addr)); - atr = res.at->next; - } + if ((result = get_nss_addresses (name, req, tmpbuf, &res)) != 0) + goto free_and_return; + else if (res.at != NULL) + goto process_list; - if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) - { - atr->family = AF_INET; - if ((req->ai_flags & AI_PASSIVE) == 0) - atr->addr[0] = htonl (INADDR_LOOPBACK); - } - } + /* None of the lookups worked, so name not found. */ + result = -EAI_NONAME; + goto free_and_return; process_list: { -- 2.35.1