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dirmngr: Fix alignment of ADDR. 

* dirmngr/dns-stuff.h (dns_addrinfo_s): Use struct sockaddr_storage
for size and alignment.
* dirmngr/dns-stuff.c (resolve_name_libdns): Follow the change.
(resolve_dns_name): Use struct sockaddr_storage.
(resolve_addr_standard, resolve_dns_addr): Likewise.
(resolve_dns_addr): Likewise.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-04-13 14:33:33 +09:00
parent 37018adce6
commit 892b33bb2c
2 changed files with 19 additions and 16 deletions
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31
dirmngr/dns-stuff.c
View File

@ -844,7 +844,7 @@ resolve_name_libdns (const char *name, unsigned short port,
(*r_canonname)[strlen (*r_canonname)-1] = 0;
}
dai = xtrymalloc (sizeof *dai + ent->ai_addrlen -1);
dai = xtrymalloc (sizeof *dai);
if (dai == NULL)
{
err = gpg_error_from_syserror ();
@ -968,7 +968,7 @@ resolve_name_standard (const char *name, unsigned short port,
if (opt_disable_ipv6 && ai->ai_family == AF_INET6)
continue;
dai = xtrymalloc (sizeof *dai + ai->ai_addrlen - 1);
dai = xtrymalloc (sizeof *dai);
dai->family = ai->ai_family;
dai->socktype = ai->ai_socktype;
dai->protocol = ai->ai_protocol;
@ -1036,7 +1036,7 @@ resolve_dns_name (const char *name, unsigned short port,
#ifdef USE_LIBDNS
/* Resolve an address using libdns. */
static gpg_error_t
resolve_addr_libdns (const struct sockaddr *addr, int addrlen,
resolve_addr_libdns (const struct sockaddr_storage *addr, int addrlen,
unsigned int flags, char **r_name)
{
gpg_error_t err;
@ -1050,13 +1050,13 @@ resolve_addr_libdns (const struct sockaddr *addr, int addrlen,
/* First we turn ADDR into a DNS name (with ".arpa" suffix). */
err = 0;
if (addr->sa_family == AF_INET6)
if (addr->ss_family == AF_INET6)
{
const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *)addr;
if (!dns_aaaa_arpa (host, sizeof host, (void*)&a6->sin6_addr))
err = gpg_error (GPG_ERR_INV_OBJ);
}
else if (addr->sa_family == AF_INET)
else if (addr->ss_family == AF_INET)
{
const struct sockaddr_in *a4 = (const struct sockaddr_in *)addr;
if (!dns_a_arpa (host, sizeof host, (void*)&a4->sin_addr))
@ -1144,18 +1144,19 @@ resolve_addr_libdns (const struct sockaddr *addr, int addrlen,
buflen = sizeof ptr.host;
p = buffer;
if (addr->sa_family == AF_INET6 && (flags & DNS_WITHBRACKET))
if (addr->ss_family == AF_INET6 && (flags & DNS_WITHBRACKET))
{
*p++ = '[';
buflen -= 2;
}
ec = getnameinfo (addr, addrlen, p, buflen, NULL, 0, NI_NUMERICHOST);
ec = getnameinfo ((const struct sockaddr *)addr,
addrlen, p, buflen, NULL, 0, NI_NUMERICHOST);
if (ec)
{
err = map_eai_to_gpg_error (ec);
goto leave;
}
if (addr->sa_family == AF_INET6 && (flags & DNS_WITHBRACKET))
if (addr->ss_family == AF_INET6 && (flags & DNS_WITHBRACKET))
strcat (buffer, "]");
}
@ -1169,7 +1170,7 @@ resolve_addr_libdns (const struct sockaddr *addr, int addrlen,
/* Resolve an address using the standard system function. */
static gpg_error_t
resolve_addr_standard (const struct sockaddr *addr, int addrlen,
resolve_addr_standard (const struct sockaddr_storage *addr, int addrlen,
unsigned int flags, char **r_name)
{
gpg_error_t err;
@ -1187,20 +1188,22 @@ resolve_addr_standard (const struct sockaddr *addr, int addrlen,
if ((flags & DNS_NUMERICHOST) || tor_mode)
ec = EAI_NONAME;
else
ec = getnameinfo (addr, addrlen, buffer, buflen, NULL, 0, NI_NAMEREQD);
ec = getnameinfo ((const struct sockaddr *)addr,
addrlen, buffer, buflen, NULL, 0, NI_NAMEREQD);
if (!ec && *buffer == '[')
ec = EAI_FAIL; /* A name may never start with a bracket. */
else if (ec == EAI_NONAME)
{
p = buffer;
if (addr->sa_family == AF_INET6 && (flags & DNS_WITHBRACKET))
if (addr->ss_family == AF_INET6 && (flags & DNS_WITHBRACKET))
{
*p++ = '[';
buflen -= 2;
}
ec = getnameinfo (addr, addrlen, p, buflen, NULL, 0, NI_NUMERICHOST);
if (!ec && addr->sa_family == AF_INET6 && (flags & DNS_WITHBRACKET))
ec = getnameinfo ((const struct sockaddr *)addr,
addrlen, p, buflen, NULL, 0, NI_NUMERICHOST);
if (!ec && addr->ss_family == AF_INET6 && (flags & DNS_WITHBRACKET))
strcat (buffer, "]");
}
@ -1229,7 +1232,7 @@ resolve_addr_standard (const struct sockaddr *addr, int addrlen,
/* A wrapper around getnameinfo. */
gpg_error_t
resolve_dns_addr (const struct sockaddr *addr, int addrlen,
resolve_dns_addr (const struct sockaddr_storage *addr, int addrlen,
unsigned int flags, char **r_name)
{
gpg_error_t err;

4
dirmngr/dns-stuff.h
View File

@ -78,7 +78,7 @@ struct dns_addrinfo_s
int socktype;
int protocol;
int addrlen;
struct sockaddr addr[1];
struct sockaddr_storage addr[1];
};
@ -142,7 +142,7 @@ gpg_error_t resolve_dns_name (const char *name, unsigned short port,
dns_addrinfo_t *r_dai, char **r_canonname);
/* Function similar to getnameinfo. */
gpg_error_t resolve_dns_addr (const struct sockaddr *addr, int addrlen,
gpg_error_t resolve_dns_addr (const struct sockaddr_storage *addr, int addrlen,
unsigned int flags, char **r_name);
/* Return true if NAME is a numerical IP address. */