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Update.

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1999-08-25  Ulrich Drepper  <drepper@cygnus.com>

	* inet/Makefile (routines): Add getipnodebynm.
	* inet/getipnodebynm.c: New file.
	* nss/digits_dots.c: If HAVE_TYPE is define type contains the
	interface type.
	* nss/nss_files/files-XXX.c: Define EXTRA_ARGS, EXTRA_ARGS_DECL, and
	EXTRA_ARGS_VALUE is not already done.
	(internal_getent): Allow extra parameters and pass them to parse_line.
	(_nss_files_get,ENTNAME_r): Pass extra parameters to internal_getent.
	(_nss_files_get##name##_r): Likewise.
	* nss/nss_files/files-hosts.c: Define EXTRA_ARGS, EXTRA_ARGS_DECL,
	and EXTRA_ARGS_VALUE to pass flags and type to parser.
	Add getipnodebyname function.
	* nss/nss_files/files-parse.c: Define EXTRA_ARGS, EXTRA_ARGS_DECL, and
	EXTRA_ARGS_VALUE is not already done.
	(parse_line): Add EXTRA_ARGS_DECL to parameter list.
	* nss/nss_db/db-XXX.c (lookup): Allow extra parameters and pass them
	to parse_line.
	(_nss_db_get##name##_r): Pass extra parameters to lookup.
	(_nss_db_get,ENTNAME_r): Likewise.
	* sysdeps/generic/if_index.c (__protocol_available): New function.
	* sysdeps/unix/sysv/linux/if_index.c: Likewise.
This commit is contained in:
Ulrich Drepper
1999-08-25 17:19:50 +00:00
parent ad65970214
commit 71d3bda9a7
11 changed files with 381 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

83
sysdeps/unix/sysv/linux/if_index.c
View File

@ -54,9 +54,9 @@ opensock (void)
if (fd == -1)
{
fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
if (fd < 0)
fd = __socket (sock_af = AF_IPX, SOCK_DGRAM, 0);
if (fd < 0)
@ -277,3 +277,82 @@ if_indextoname (unsigned int ifindex, char *ifname)
# endif
#endif
}
void
internal_function
__protocol_avaliable (int *have_inet, int *have_inet6)
{
int fd = opensock ();
unsigned int nifs;
int rq_len;
struct ifconf ifc;
# if __ASSUME_SIOCGIFNAME == 0
static int old_siocgifconf;
# else
# define old_siocgifconf 0
# endif
# define RQ_IFS 4
/* Wirst case assumption. */
*have_inet = 0;
*have_inet6 = 0;
if (fd == NULL)
/* We cannot open the socket. No networking at all? */
return;
/* We may be able to get the needed buffer size directly, rather than
guessing. */
if (! old_siocgifconf)
{
ifc.ifc_buf = NULL;
ifc.ifc_len = 0;
if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0 || ifc.ifc_len == 0)
{
# if __ASSUME_SIOCGIFNAME == 0
old_siocgifconf = 1;
# endif
rq_len = RQ_IFS * sizeof (struct ifreq);
}
else
rq_len = ifc.ifc_len;
}
else
rq_len = RQ_IFS * sizeof (struct ifreq);
/* Read all the interfaces out of the kernel. */
do
{
ifc.ifc_buf = alloca (ifc.ifc_len = rq_len);
if (ifc.ifc_buf == NULL || __ioctl (fd, SIOCGIFCONF, &ifc) < 0)
{
__close (fd);
return;
}
rq_len *= 2;
}
while (ifc.ifc_len == rq_len && old_siocgifconf);
nifs = ifc.ifc_len / sizeof (struct ifreq);
/* Go through all the interfaces and get the address. */
while (nifs-- > 0)
if (__ioctl (fd, SIOCGIFADDR, &ifc.ifc_req[nifs]) >= 0)
{
/* We successfully got information about this interface. Now
test whether it is an IPv4 or IPv6 address. */
if (ifc.ifc_req[nifs].ifr_addr.sa_family == AF_INET)
*have_inet = 1;
else if (ifc.ifc_req[nifs].ifr_addr.sa_family == AF_INET6)
*have_inet6 = 1;
/* Note, this is & not &&. It works since the values are always
0 or 1. */
if (*have_inet & *have_inet6)
/* We can stop early. */
break;
}
__close (fd);
}