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authorAndreas Jaeger <aj@suse.de>2003-01-01 16:29:36 +0000
committerAndreas Jaeger <aj@suse.de>2003-01-01 16:29:36 +0000
commit16b6606283b0d27fe365916562ada9e8e7d267af (patch)
tree88a117b2c5bad12da6dd9cefef34b9e56c787bb7 /resolv
parentee2a5ae8751f83d37627def14000622f0f2b293a (diff)
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* resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr_r): Use union type to avoid strict aliasing problem. (_nss_dns_gethostbyname2_r): Likewise. * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyaddr_r): Likewise. (_nss_dns_getnetbyname_r): Likewise.
* resolv/gethnamaddr.c (_gethtent): Likewise. (gethostbyname2): Likewise.
Diffstat (limited to 'resolv')
-rw-r--r--resolv/gethnamaddr.c56
-rw-r--r--resolv/nss_dns/dns-host.c58
-rw-r--r--resolv/nss_dns/dns-network.c46
3 files changed, 95 insertions, 65 deletions
diff --git a/resolv/gethnamaddr.c b/resolv/gethnamaddr.c
index e941b5c..2172375 100644
--- a/resolv/gethnamaddr.c
+++ b/resolv/gethnamaddr.c
@@ -262,9 +262,9 @@ getanswer(answer, anslen, qname, qtype)
cp += n; /* name */
BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ);
type = ns_get16(cp);
- cp += INT16SZ; /* type */
+ cp += INT16SZ; /* type */
class = ns_get16(cp);
- cp += INT16SZ + INT32SZ; /* class, TTL */
+ cp += INT16SZ + INT32SZ; /* class, TTL */
n = ns_get16(cp);
cp += INT16SZ; /* len */
BOUNDS_CHECK(cp, n);
@@ -510,7 +510,12 @@ gethostbyname2(name, af)
const char *name;
int af;
{
- querybuf *buf, *origbuf;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } buf;
+ querybuf *origbuf;
register const char *cp;
char *bp;
int n, size, type, len;
@@ -616,20 +621,20 @@ gethostbyname2(name, af)
break;
}
- buf = origbuf = (querybuf *) alloca (1024);
+ buf.buf = origbuf = (querybuf *) alloca (1024);
- if ((n = __libc_res_nsearch(&_res, name, C_IN, type, buf->buf, 1024,
- (u_char **) &buf)) < 0) {
- if (buf != origbuf)
- free (buf);
+ if ((n = __libc_res_nsearch(&_res, name, C_IN, type, buf.buf->buf, 1024,
+ &buf.ptr)) < 0) {
+ if (buf.buf != origbuf)
+ free (buf.buf);
dprintf("res_nsearch failed (%d)\n", n);
if (errno == ECONNREFUSED)
return (_gethtbyname2(name, af));
return (NULL);
}
- ret = getanswer(buf, n, name, type);
- if (buf != origbuf)
- free (buf);
+ ret = getanswer(buf.buf, n, name, type);
+ if (buf.buf != origbuf)
+ free (buf.buf);
return ret;
}
@@ -644,7 +649,12 @@ gethostbyaddr(addr, len, af)
static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
int n;
socklen_t size;
- querybuf *buf, *orig_buf;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } buf;
+ querybuf *orig_buf;
register struct hostent *hp;
char qbuf[MAXDNAME+1], *qp = NULL;
#ifdef SUNSECURITY
@@ -706,27 +716,27 @@ gethostbyaddr(addr, len, af)
abort();
}
- buf = orig_buf = (querybuf *) alloca (1024);
+ buf.buf = orig_buf = (querybuf *) alloca (1024);
- n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf->buf, 1024,
- (u_char **) &buf);
+ n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf, 1024,
+ &buf.ptr);
if (n < 0 && af == AF_INET6) {
strcpy(qp, "ip6.int");
- n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf->buf,
- buf != orig_buf ? MAXPACKET : 1024,
- (u_char **) &buf);
+ n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf,
+ buf.buf != orig_buf ? MAXPACKET : 1024,
+ &buf.ptr);
}
if (n < 0) {
- if (buf != orig_buf)
- free (buf);
+ if (buf.buf != orig_buf)
+ free (buf.buf);
dprintf("res_nquery failed (%d)\n", n);
if (errno == ECONNREFUSED)
return (_gethtbyaddr(addr, len, af));
return (NULL);
}
- hp = getanswer(buf, n, qbuf, T_PTR);
- if (buf != orig_buf)
- free (buf);
+ hp = getanswer(buf.buf, n, qbuf, T_PTR);
+ if (buf.buf != orig_buf)
+ free (buf.buf);
if (!hp)
return (NULL); /* h_errno was set by getanswer() */
#ifdef SUNSECURITY
diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c
index b01dc54..f362dd7 100644
--- a/resolv/nss_dns/dns-host.c
+++ b/resolv/nss_dns/dns-host.c
@@ -132,7 +132,12 @@ _nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result,
char *buffer, size_t buflen, int *errnop,
int *h_errnop)
{
- querybuf *host_buffer, *orig_host_buffer;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } host_buffer;
+ querybuf *orig_host_buffer;
char tmp[NS_MAXDNAME];
int size, type, n;
const char *cp;
@@ -170,10 +175,10 @@ _nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result,
&& (cp = res_hostalias (&_res, name, tmp, sizeof (tmp))) != NULL)
name = cp;
- host_buffer = orig_host_buffer = (querybuf *) alloca (1024);
+ host_buffer.buf = orig_host_buffer = (querybuf *) alloca (1024);
- n = __libc_res_nsearch (&_res, name, C_IN, type, host_buffer->buf,
- 1024, (u_char **) &host_buffer);
+ n = __libc_res_nsearch (&_res, name, C_IN, type, host_buffer.buf->buf,
+ 1024, &host_buffer.ptr);
if (n < 0)
{
enum nss_status status = (errno == ECONNREFUSED
@@ -188,14 +193,14 @@ _nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result,
by having the RES_USE_INET6 bit in _res.options set, we try
another lookup. */
if (af == AF_INET6 && (_res.options & RES_USE_INET6))
- n = __libc_res_nsearch (&_res, name, C_IN, T_A, host_buffer->buf,
- host_buffer != orig_host_buffer
- ? MAXPACKET : 1024, (u_char **) &host_buffer);
+ n = __libc_res_nsearch (&_res, name, C_IN, T_A, host_buffer.buf->buf,
+ host_buffer.buf != orig_host_buffer
+ ? MAXPACKET : 1024, &host_buffer.ptr);
if (n < 0)
{
- if (host_buffer != orig_host_buffer)
- free (host_buffer);
+ if (host_buffer.buf != orig_host_buffer)
+ free (host_buffer.buf);
return status;
}
@@ -205,10 +210,10 @@ _nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result,
result->h_length = INADDRSZ;;
}
- status = getanswer_r (host_buffer, n, name, type, result, buffer, buflen,
+ status = getanswer_r (host_buffer.buf, n, name, type, result, buffer, buflen,
errnop, h_errnop, map);
- if (host_buffer != orig_host_buffer)
- free (host_buffer);
+ if (host_buffer.buf != orig_host_buffer)
+ free (host_buffer.buf);
return status;
}
@@ -247,7 +252,12 @@ _nss_dns_gethostbyaddr_r (const void *addr, socklen_t len, int af,
char *h_addr_ptrs[MAX_NR_ADDRS + 1];
char linebuffer[0];
} *host_data = (struct host_data *) buffer;
- querybuf *host_buffer, *orig_host_buffer;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } host_buffer;
+ querybuf *orig_host_buffer;
char qbuf[MAXDNAME+1], *qp = NULL;
size_t size;
int n, status;
@@ -305,30 +315,30 @@ _nss_dns_gethostbyaddr_r (const void *addr, socklen_t len, int af,
break;
}
- host_buffer = orig_host_buffer = (querybuf *) alloca (1024);
+ host_buffer.buf = orig_host_buffer = (querybuf *) alloca (1024);
- n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, host_buffer->buf,
- 1024, (u_char **) &host_buffer);
+ n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, host_buffer.buf->buf,
+ 1024, &host_buffer.ptr);
if (n < 0 && af == AF_INET6)
{
strcpy (qp, "ip6.int");
- n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, host_buffer->buf,
- host_buffer != orig_host_buffer
- ? MAXPACKET : 1024, (u_char **) &host_buffer);
+ n = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, host_buffer.buf->buf,
+ host_buffer.buf != orig_host_buffer
+ ? MAXPACKET : 1024, &host_buffer.ptr);
}
if (n < 0)
{
*h_errnop = h_errno;
__set_errno (olderr);
- if (host_buffer != orig_host_buffer)
- free (host_buffer);
+ if (host_buffer.buf != orig_host_buffer)
+ free (host_buffer.buf);
return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
}
- status = getanswer_r (host_buffer, n, qbuf, T_PTR, result, buffer, buflen,
+ status = getanswer_r (host_buffer.buf, n, qbuf, T_PTR, result, buffer, buflen,
errnop, h_errnop, 0 /* XXX */);
- if (host_buffer != orig_host_buffer)
- free (host_buffer);
+ if (host_buffer.buf != orig_host_buffer)
+ free (host_buffer.buf);
if (status != NSS_STATUS_SUCCESS)
{
*h_errnop = h_errno;
diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
index 6ba66ba..efda486 100644
--- a/resolv/nss_dns/dns-network.c
+++ b/resolv/nss_dns/dns-network.c
@@ -110,7 +110,12 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
int *herrnop)
{
/* Return entry for network with NAME. */
- querybuf *net_buffer, *orig_net_buffer;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } net_buffer;
+ querybuf *orig_net_buffer;
int anslen;
char *qbuf;
enum nss_status status;
@@ -120,25 +125,25 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
qbuf = strdupa (name);
- net_buffer = orig_net_buffer = (querybuf *) alloca (1024);
+ net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
- anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer->buf,
- 1024, (u_char **) &net_buffer);
+ anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
+ 1024, &net_buffer.ptr);
if (anslen < 0)
{
/* Nothing found. */
*errnop = errno;
- if (net_buffer != orig_net_buffer)
- free (net_buffer);
+ if (net_buffer.buf != orig_net_buffer)
+ free (net_buffer.buf);
return (errno == ECONNREFUSED
|| errno == EPFNOSUPPORT
|| errno == EAFNOSUPPORT)
? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
}
- status = getanswer_r (net_buffer, anslen, result, buffer, buflen, BYNAME);
- if (net_buffer != orig_net_buffer)
- free (net_buffer);
+ status = getanswer_r (net_buffer.buf, anslen, result, buffer, buflen, BYNAME);
+ if (net_buffer.buf != orig_net_buffer)
+ free (net_buffer.buf);
return status;
}
@@ -150,7 +155,12 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result,
{
/* Return entry for network with NAME. */
enum nss_status status;
- querybuf *net_buffer, *orig_net_buffer;
+ union
+ {
+ querybuf *buf;
+ u_char *ptr;
+ } net_buffer;
+ querybuf *orig_net_buffer;
unsigned int net_bytes[4];
char qbuf[MAXDNAME];
int cnt, anslen;
@@ -190,26 +200,26 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result,
break;
}
- net_buffer = orig_net_buffer = (querybuf *) alloca (1024);
+ net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
- anslen = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, net_buffer->buf,
- 1024, (u_char **) &net_buffer);
+ anslen = __libc_res_nquery (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
+ 1024, &net_buffer.ptr);
if (anslen < 0)
{
/* Nothing found. */
int err = errno;
__set_errno (olderr);
- if (net_buffer != orig_net_buffer)
- free (net_buffer);
+ if (net_buffer.buf != orig_net_buffer)
+ free (net_buffer.buf);
return (err == ECONNREFUSED
|| err == EPFNOSUPPORT
|| err == EAFNOSUPPORT)
? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
}
- status = getanswer_r (net_buffer, anslen, result, buffer, buflen, BYADDR);
- if (net_buffer != orig_net_buffer)
- free (net_buffer);
+ status = getanswer_r (net_buffer.buf, anslen, result, buffer, buflen, BYADDR);
+ if (net_buffer.buf != orig_net_buffer)
+ free (net_buffer.buf);
if (status == NSS_STATUS_SUCCESS)
{
/* Strip trailing zeros. */