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dirmngr: Implement a getnameinfo wrapper.

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* dirmngr/dns-stuff.h (DNS_NUMERICHOST): New.
(DNS_WITHBRACKET): New.
* dirmngr/dns-stuff.c (resolve_name_standard): Factor code out to...
(map_eai_to_gpg_error): new.
(resolve_addr_standard): New.
(resolve_dns_addr): New.

* dirmngr/ks-engine-hkp.c (is_ip_address): Move to ...
* dirmngr/dns-stuff.c (is_ip_address): here.  Add support for non
bracketed v6 addresses.

* dirmngr/t-dns-stuff.c: Remove header netdb.h.
(main): Add option --bracket.  Use resolve_dns_name instead of
getnameinfo.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-10-24 16:27:47 +02:00
parent 7f65e84ac0
commit 816505958a
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GPG key ID: E3FDFF218E45B72B
4 changed files with 221 additions and 60 deletions
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32
dirmngr/ks-engine-hkp.c
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@ -280,38 +280,6 @@ my_getnameinfo (dns_addrinfo_t ai, char *host, size_t hostlen,
}
/* Check whether NAME is an IP address. */
static int
is_ip_address (const char *name)
{
int ndots, n;
if (*name == '[')
return 1;
/* Check whether it is legacy IP address. */
if (*name == '.')
return 0; /* No. */
ndots = n = 0;
for (; *name; name++)
{
if (*name == '.')
{
if (name[1] == '.')
return 0; /* No. */
if (atoi (name+1) > 255)
return 0; /* Value too large. */
ndots++;
n = 0;
}
else if (!strchr ("012345678", *name))
return 0; /* Not a digit. */
else if (++n > 3)
return 0; /* More than 3 digits. */
}
return !!(ndots == 3);
}
/* Map the host name NAME to the actual to be used host name. This
allows us to manage round robin DNS names. We use our own strategy
to choose one of the hosts. For example we skip those hosts which