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Fix strict aliasing issues 

Strict aliasing warnings can now lead to broken code with gcc 4.4. Replace
various sockaddr casts by unions.
merge-requests/1/head
Julien BLACHE 2009-06-16 15:07:00 +02:00
rodzic 177f8d2022
commit f06cf4770b
2 zmienionych plików z 39 dodań i 23 usunięć
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4
ChangeLog
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@ -1,3 +1,7 @@
2009-06-16 Julien Blache <jb@jblache.org>
* frontend/saned.c: fix strict aliasing issues, now problematic
with gcc 4.4.
2009-06-14 Nicolas Martin <nicols-guest at users.alioth.debian.org>
* backend/pixma_mp150.c, doc/descriptions/pixma.desc, doc/sane-pixma.man:
Thanks to Vladimir Andreev patch, fix network scan for MP800R.

56
frontend/saned.c
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@ -258,7 +258,12 @@ static in_port_t data_port_lo;
static in_port_t data_port_hi;
#ifdef SANED_USES_AF_INDEP
static struct sockaddr_storage remote_address;
static union {
struct sockaddr_storage ss;
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} remote_address;
static int remote_address_len;
#else
static struct in_addr remote_address;
@ -750,15 +755,15 @@ check_host (int fd)
FILE *fp;
/* Get address of remote host */
remote_address_len = sizeof (remote_address);
if (getpeername (fd, (struct sockaddr *) &remote_address, (socklen_t *) &remote_address_len) < 0)
remote_address_len = sizeof (remote_address.ss);
if (getpeername (fd, &remote_address.sa, (socklen_t *) &remote_address_len) < 0)
{
DBG (DBG_ERR, "check_host: getpeername failed: %s\n", strerror (errno));
remote_ip = strdup ("[error]");
return SANE_STATUS_INVAL;
}
err = getnameinfo ((struct sockaddr *) &remote_address, remote_address_len,
err = getnameinfo (&remote_address.sa, remote_address_len,
hostname, sizeof (hostname), NULL, 0, NI_NUMERICHOST);
if (err)
{
@ -770,7 +775,7 @@ check_host (int fd)
remote_ip = strdup (hostname);
#ifdef ENABLE_IPV6
sin6 = (struct sockaddr_in6 *) &remote_address;
sin6 = &remote_address.sin6;
if (SANE_IN6_IS_ADDR_V4MAPPED (sin6->sin6_addr.s6_addr))
{
@ -815,9 +820,9 @@ check_host (int fd)
}
#endif /* ENABLE_IPV6 */
sin = (struct sockaddr_in *) &remote_address;
sin = &remote_address.sin;
switch (SS_FAMILY(remote_address))
switch (SS_FAMILY(remote_address.ss))
{
case AF_INET:
if (IN_LOOPBACK (ntohl (sin->sin_addr.s_addr)))
@ -995,7 +1000,7 @@ check_host (int fd)
{
if (strchr (config_line, ':') != NULL) /* is a v6 address */
{
if (SS_FAMILY(remote_address) == AF_INET6)
if (SS_FAMILY(remote_address.ss) == AF_INET6)
{
if (check_v6_in_range (sin6, config_line, netmask))
{
@ -1021,7 +1026,7 @@ check_host (int fd)
sin = (struct sockaddr_in *)res->ai_addr;
}
if ((SS_FAMILY(remote_address) == AF_INET) ||
if ((SS_FAMILY(remote_address.ss) == AF_INET) ||
(IPv4map == SANE_TRUE))
{
@ -1034,7 +1039,7 @@ check_host (int fd)
else
{
/* restore the old sin pointer */
sin = (struct sockaddr_in *)&remote_address;
sin = &remote_address.sin;
}
if (res != NULL)
@ -1399,7 +1404,14 @@ init (Wire * w)
static int
start_scan (Wire * w, int h, SANE_Start_Reply * reply)
{
union {
struct sockaddr_storage ss;
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef ENABLE_IPV6
struct sockaddr_in6 sin6;
#endif /* ENABLE_IPV6 */
} data_addr;
struct sockaddr_in *sin;
#ifdef ENABLE_IPV6
struct sockaddr_in6 *sin6;
@ -1411,8 +1423,8 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
be_handle = handle[h].handle;
len = sizeof (ss);
if (getsockname (w->io.fd, (struct sockaddr *) &ss, (socklen_t *) &len) < 0)
len = sizeof (data_addr.ss);
if (getsockname (w->io.fd, &data_addr.sa, (socklen_t *) &len) < 0)
{
DBG (DBG_ERR, "start_scan: failed to obtain socket address (%s)\n",
strerror (errno));
@ -1420,7 +1432,7 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
return -1;
}
fd = socket (SS_FAMILY(ss), SOCK_STREAM, 0);
fd = socket (SS_FAMILY(data_addr.ss), SOCK_STREAM, 0);
if (fd < 0)
{
DBG (DBG_ERR, "start_scan: failed to obtain data socket (%s)\n",
@ -1429,14 +1441,14 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
return -1;
}
switch (SS_FAMILY(ss))
switch (SS_FAMILY(data_addr.ss))
{
case AF_INET:
sin = (struct sockaddr_in *) &ss;
sin = &data_addr.sin;
break;
#ifdef ENABLE_IPV6
case AF_INET6:
sin6 = (struct sockaddr_in6 *) &ss;
sin6 = &data_addr.sin6;
break;
#endif /* ENABLE_IPV6 */
default:
@ -1446,7 +1458,7 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
/* Try to bind a port between data_port_lo and data_port_hi for the data connection */
for (data_port = data_port_lo; data_port <= data_port_hi; data_port++)
{
switch (SS_FAMILY(ss))
switch (SS_FAMILY(data_addr.ss))
{
case AF_INET:
sin->sin_port = htons(data_port);
@ -1462,7 +1474,7 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
DBG (DBG_INFO, "start_scan: trying to bind data port %d\n", data_port);
ret = bind (fd, (struct sockaddr *) &ss, len);
ret = bind (fd, &data_addr.sa, len);
if (ret == 0)
break;
}
@ -1483,7 +1495,7 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
return -1;
}
if (getsockname (fd, (struct sockaddr *) &ss, (socklen_t *) &len) < 0)
if (getsockname (fd, &data_addr.sa, (socklen_t *) &len) < 0)
{
DBG (DBG_ERR, "start_scan: failed to obtain socket address (%s)\n",
strerror (errno));
@ -1491,15 +1503,15 @@ start_scan (Wire * w, int h, SANE_Start_Reply * reply)
return -1;
}
switch (SS_FAMILY(ss))
switch (SS_FAMILY(data_addr.ss))
{
case AF_INET:
sin = (struct sockaddr_in *) &ss;
sin = &data_addr.sin;
reply->port = ntohs (sin->sin_port);
break;
#ifdef ENABLE_IPV6
case AF_INET6:
sin6 = (struct sockaddr_in6 *) &ss;
sin6 = &data_addr.sin6;
reply->port = ntohs (sin6->sin6_port);
break;
#endif /* ENABLE_IPV6 */