247 lines
6.8 KiB
C
247 lines
6.8 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2020, 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.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "curl_setup.h"
|
|
|
|
#ifdef HAVE_NETINET_IN_H
|
|
# include <netinet/in.h>
|
|
#endif
|
|
#ifdef HAVE_ARPA_INET_H
|
|
# include <arpa/inet.h>
|
|
#endif
|
|
#ifdef HAVE_NET_IF_H
|
|
# include <net/if.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_IOCTL_H
|
|
# include <sys/ioctl.h>
|
|
#endif
|
|
#ifdef HAVE_NETDB_H
|
|
# include <netdb.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_SOCKIO_H
|
|
# include <sys/sockio.h>
|
|
#endif
|
|
#ifdef HAVE_IFADDRS_H
|
|
# include <ifaddrs.h>
|
|
#endif
|
|
#ifdef HAVE_STROPTS_H
|
|
# include <stropts.h>
|
|
#endif
|
|
#ifdef __VMS
|
|
# include <inet.h>
|
|
#endif
|
|
|
|
#include "inet_ntop.h"
|
|
#include "strcase.h"
|
|
#include "if2ip.h"
|
|
/* The last 3 #include files should be in this order */
|
|
#include "curl_printf.h"
|
|
#include "curl_memory.h"
|
|
#include "memdebug.h"
|
|
|
|
/* ------------------------------------------------------------------ */
|
|
|
|
/* Return the scope of the given address. */
|
|
unsigned int Curl_ipv6_scope(const struct sockaddr *sa)
|
|
{
|
|
#ifndef ENABLE_IPV6
|
|
(void) sa;
|
|
#else
|
|
if(sa->sa_family == AF_INET6) {
|
|
const struct sockaddr_in6 * sa6 = (const struct sockaddr_in6 *)(void *) sa;
|
|
const unsigned char *b = sa6->sin6_addr.s6_addr;
|
|
unsigned short w = (unsigned short) ((b[0] << 8) | b[1]);
|
|
|
|
if((b[0] & 0xFE) == 0xFC) /* Handle ULAs */
|
|
return IPV6_SCOPE_UNIQUELOCAL;
|
|
switch(w & 0xFFC0) {
|
|
case 0xFE80:
|
|
return IPV6_SCOPE_LINKLOCAL;
|
|
case 0xFEC0:
|
|
return IPV6_SCOPE_SITELOCAL;
|
|
case 0x0000:
|
|
w = b[1] | b[2] | b[3] | b[4] | b[5] | b[6] | b[7] | b[8] | b[9] |
|
|
b[10] | b[11] | b[12] | b[13] | b[14];
|
|
if(w || b[15] != 0x01)
|
|
break;
|
|
return IPV6_SCOPE_NODELOCAL;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return IPV6_SCOPE_GLOBAL;
|
|
}
|
|
|
|
|
|
#if defined(HAVE_GETIFADDRS)
|
|
|
|
if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
|
|
unsigned int local_scope_id, const char *interf,
|
|
char *buf, int buf_size)
|
|
{
|
|
struct ifaddrs *iface, *head;
|
|
if2ip_result_t res = IF2IP_NOT_FOUND;
|
|
|
|
#ifndef ENABLE_IPV6
|
|
(void) remote_scope;
|
|
#endif
|
|
|
|
#if !defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID) || \
|
|
!defined(ENABLE_IPV6)
|
|
(void) local_scope_id;
|
|
#endif
|
|
|
|
if(getifaddrs(&head) >= 0) {
|
|
for(iface = head; iface != NULL; iface = iface->ifa_next) {
|
|
if(iface->ifa_addr != NULL) {
|
|
if(iface->ifa_addr->sa_family == af) {
|
|
if(strcasecompare(iface->ifa_name, interf)) {
|
|
void *addr;
|
|
const char *ip;
|
|
char scope[12] = "";
|
|
char ipstr[64];
|
|
#ifdef ENABLE_IPV6
|
|
if(af == AF_INET6) {
|
|
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
|
|
unsigned int scopeid = 0;
|
|
#endif
|
|
unsigned int ifscope = Curl_ipv6_scope(iface->ifa_addr);
|
|
|
|
if(ifscope != remote_scope) {
|
|
/* We are interested only in interface addresses whose scope
|
|
matches the remote address we want to connect to: global
|
|
for global, link-local for link-local, etc... */
|
|
if(res == IF2IP_NOT_FOUND)
|
|
res = IF2IP_AF_NOT_SUPPORTED;
|
|
continue;
|
|
}
|
|
|
|
addr =
|
|
&((struct sockaddr_in6 *)(void *)iface->ifa_addr)->sin6_addr;
|
|
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
|
|
/* Include the scope of this interface as part of the address */
|
|
scopeid = ((struct sockaddr_in6 *)(void *)iface->ifa_addr)
|
|
->sin6_scope_id;
|
|
|
|
/* If given, scope id should match. */
|
|
if(local_scope_id && scopeid != local_scope_id) {
|
|
if(res == IF2IP_NOT_FOUND)
|
|
res = IF2IP_AF_NOT_SUPPORTED;
|
|
|
|
continue;
|
|
}
|
|
|
|
if(scopeid)
|
|
msnprintf(scope, sizeof(scope), "%%%u", scopeid);
|
|
#endif
|
|
}
|
|
else
|
|
#endif
|
|
addr =
|
|
&((struct sockaddr_in *)(void *)iface->ifa_addr)->sin_addr;
|
|
res = IF2IP_FOUND;
|
|
ip = Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr));
|
|
msnprintf(buf, buf_size, "%s%s", ip, scope);
|
|
break;
|
|
}
|
|
}
|
|
else if((res == IF2IP_NOT_FOUND) &&
|
|
strcasecompare(iface->ifa_name, interf)) {
|
|
res = IF2IP_AF_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
freeifaddrs(head);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
#elif defined(HAVE_IOCTL_SIOCGIFADDR)
|
|
|
|
if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
|
|
unsigned int local_scope_id, const char *interf,
|
|
char *buf, int buf_size)
|
|
{
|
|
struct ifreq req;
|
|
struct in_addr in;
|
|
struct sockaddr_in *s;
|
|
curl_socket_t dummy;
|
|
size_t len;
|
|
const char *r;
|
|
|
|
(void)remote_scope;
|
|
(void)local_scope_id;
|
|
|
|
if(!interf || (af != AF_INET))
|
|
return IF2IP_NOT_FOUND;
|
|
|
|
len = strlen(interf);
|
|
if(len >= sizeof(req.ifr_name))
|
|
return IF2IP_NOT_FOUND;
|
|
|
|
dummy = socket(AF_INET, SOCK_STREAM, 0);
|
|
if(CURL_SOCKET_BAD == dummy)
|
|
return IF2IP_NOT_FOUND;
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
memcpy(req.ifr_name, interf, len + 1);
|
|
req.ifr_addr.sa_family = AF_INET;
|
|
|
|
if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
|
|
sclose(dummy);
|
|
/* With SIOCGIFADDR, we cannot tell the difference between an interface
|
|
that does not exist and an interface that has no address of the
|
|
correct family. Assume the interface does not exist */
|
|
return IF2IP_NOT_FOUND;
|
|
}
|
|
|
|
s = (struct sockaddr_in *)(void *)&req.ifr_addr;
|
|
memcpy(&in, &s->sin_addr, sizeof(in));
|
|
r = Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
|
|
|
|
sclose(dummy);
|
|
if(!r)
|
|
return IF2IP_NOT_FOUND;
|
|
return IF2IP_FOUND;
|
|
}
|
|
|
|
#else
|
|
|
|
if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
|
|
unsigned int local_scope_id, const char *interf,
|
|
char *buf, int buf_size)
|
|
{
|
|
(void) af;
|
|
(void) remote_scope;
|
|
(void) local_scope_id;
|
|
(void) interf;
|
|
(void) buf;
|
|
(void) buf_size;
|
|
return IF2IP_NOT_FOUND;
|
|
}
|
|
|
|
#endif
|