mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* Convert a struct hostent object to a string.
|
|
Copyright (C) 2016-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <support/format_nss.h>
|
|
|
|
#include <arpa/inet.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <support/support.h>
|
|
#include <support/xmemstream.h>
|
|
|
|
static int
|
|
address_length (int family)
|
|
{
|
|
switch (family)
|
|
{
|
|
case AF_INET:
|
|
return 4;
|
|
case AF_INET6:
|
|
return 16;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
char *
|
|
support_format_hostent (struct hostent *h)
|
|
{
|
|
if (h == NULL)
|
|
{
|
|
if (h_errno == NETDB_INTERNAL)
|
|
return xasprintf ("error: NETDB_INTERNAL (errno %d, %m)\n", errno);
|
|
else
|
|
{
|
|
char *value = support_format_herrno (h_errno);
|
|
char *result = xasprintf ("error: %s\n", value);
|
|
free (value);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
struct xmemstream mem;
|
|
xopen_memstream (&mem);
|
|
|
|
fprintf (mem.out, "name: %s\n", h->h_name);
|
|
for (char **alias = h->h_aliases; *alias != NULL; ++alias)
|
|
fprintf (mem.out, "alias: %s\n", *alias);
|
|
for (unsigned i = 0; h->h_addr_list[i] != NULL; ++i)
|
|
{
|
|
char buf[128];
|
|
if (inet_ntop (h->h_addrtype, h->h_addr_list[i],
|
|
buf, sizeof (buf)) == NULL)
|
|
fprintf (mem.out, "error: inet_ntop failed: %m\n");
|
|
else
|
|
fprintf (mem.out, "address: %s\n", buf);
|
|
}
|
|
if (h->h_length != address_length (h->h_addrtype))
|
|
{
|
|
char *family = support_format_address_family (h->h_addrtype);
|
|
fprintf (mem.out, "error: invalid address length %d for %s\n",
|
|
h->h_length, family);
|
|
free (family);
|
|
}
|
|
|
|
xfclose_memstream (&mem);
|
|
return mem.buffer;
|
|
}
|