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090b55c100
I am using curl_easy_setopt(CURLOPT_INTERFACE, "if!something") to force transfers to use a particular interface but the transfer fails with CURLE_INTERFACE_FAILED, "Failed binding local connection end" if the interface I specify has no IPv6 address. The cause is as follows: The remote hostname resolves successfully and has an IPv6 address and an IPv4 address. cURL attempts to connect to the IPv6 address first. bindlocal (in lib/connect.c) fails because Curl_if2ip cannot find an IPv6 address on the interface. This is a fatal error in singleipconnect() This change will make cURL try the next IP address in the list. Also included are two changes related to IPv6 address scope: - Filter the choice of address in Curl_if2ip to only consider addresses with the same scope ID as the connection address (mismatched scope for local and remote address does not result in a working connection). - bindlocal was ignoring the scope ID of addresses returned by Curl_if2ip . Now it uses them. Bug: http://curl.haxx.se/bug/view.cgi?id=1189
75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
#ifndef HEADER_CURL_IF2IP_H
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#define HEADER_CURL_IF2IP_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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bool Curl_if_is_interface_name(const char *interf);
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typedef enum {
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IF2IP_NOT_FOUND = 0, /* Interface not found */
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IF2IP_AF_NOT_SUPPORTED = 1, /* Int. exists but has no address for this af */
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IF2IP_FOUND = 2 /* The address has been stored in "buf" */
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} if2ip_result_t;
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if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
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const char *interf, char *buf, int buf_size);
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#ifdef __INTERIX
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/* Nedelcho Stanev's work-around for SFU 3.0 */
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struct ifreq {
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#define IFNAMSIZ 16
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#define IFHWADDRLEN 6
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union {
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char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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} ifr_ifrn;
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union {
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struct sockaddr ifru_addr;
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struct sockaddr ifru_broadaddr;
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struct sockaddr ifru_netmask;
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struct sockaddr ifru_hwaddr;
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short ifru_flags;
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int ifru_metric;
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int ifru_mtu;
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} ifr_ifru;
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};
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/* This define was added by Daniel to avoid an extra #ifdef INTERIX in the
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C code. */
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#define ifr_name ifr_ifrn.ifrn_name /* interface name */
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#define ifr_addr ifr_ifru.ifru_addr /* address */
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#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
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#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
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#define ifr_flags ifr_ifru.ifru_flags /* flags */
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#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
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#define ifr_metric ifr_ifru.ifru_metric /* metric */
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#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
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#define SIOCGIFADDR _IOW('s', 102, struct ifreq) /* Get if addr */
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#endif /* __INTERIX */
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#endif /* HEADER_CURL_IF2IP_H */
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