curl/lib/if2ip.h

#ifndef HEADER_CURL_IF2IP_H
#define HEADER_CURL_IF2IP_H
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2020, 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * SPDX-License-Identifier: curl
 *
 ***************************************************************************/
#include "curl_setup.h"

/* IPv6 address scopes. */
#define IPV6_SCOPE_GLOBAL       0       /* Global scope. */
#define IPV6_SCOPE_LINKLOCAL    1       /* Link-local scope. */
#define IPV6_SCOPE_SITELOCAL    2       /* Site-local scope (deprecated). */
#define IPV6_SCOPE_UNIQUELOCAL  3       /* Unique local */
#define IPV6_SCOPE_NODELOCAL    4       /* Loopback. */

#ifdef ENABLE_IPV6
unsigned int Curl_ipv6_scope(const struct sockaddr *sa);
#else
#define Curl_ipv6_scope(x) 0
#endif

typedef enum {
  IF2IP_NOT_FOUND = 0, /* Interface not found */
  IF2IP_AF_NOT_SUPPORTED = 1, /* Int. exists but has no address for this af */
  IF2IP_FOUND = 2 /* The address has been stored in "buf" */
} if2ip_result_t;

if2ip_result_t Curl_if2ip(int af,
#ifdef ENABLE_IPV6
                          unsigned int remote_scope,
                          unsigned int local_scope_id,
#endif
                          const char *interf,
                          char *buf, int buf_size);

#ifdef __INTERIX

/* Nedelcho Stanev's work-around for SFU 3.0 */
struct ifreq {
#define IFNAMSIZ 16
#define IFHWADDRLEN 6
  union {
    char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
  } ifr_ifrn;

 union {
   struct sockaddr ifru_addr;
   struct sockaddr ifru_broadaddr;
   struct sockaddr ifru_netmask;
   struct sockaddr ifru_hwaddr;
   short ifru_flags;
   int ifru_metric;
   int ifru_mtu;
 } ifr_ifru;
};

/* This define was added by Daniel to avoid an extra #ifdef INTERIX in the
   C code. */

#define ifr_name ifr_ifrn.ifrn_name /* interface name */
#define ifr_addr ifr_ifru.ifru_addr /* address */
#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
#define ifr_flags ifr_ifru.ifru_flags /* flags */
#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
#define ifr_metric ifr_ifru.ifru_metric /* metric */
#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */

#define SIOCGIFADDR _IOW('s', 102, struct ifreq) /* Get if addr */

#endif /* __INTERIX */

#endif /* HEADER_CURL_IF2IP_H */