X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;f=utils%2Fmount%2Fnetwork.c;h=a12fbe23ef9f779f29fc03f30abf2fc48be40332;hb=1d4a0cb29ee88257b42d18a22388e1b23cf13bcc;hp=92bba2d72667e6f6043ccea2b089dae9fb460ef9;hpb=f0d3a4bedccca7cce48296757bc1c8bd59b80828;p=nfs-utils.git

diff --git a/utils/mount/network.c b/utils/mount/network.c
index 92bba2d..a12fbe2 100644
--- a/utils/mount/network.c
+++ b/utils/mount/network.c
@@ -37,6 +37,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
+#include <sys/stat.h>
 #include <netinet/in.h>
 #include <rpc/rpc.h>
 #include <rpc/pmap_prot.h>
@@ -1331,21 +1332,38 @@ nfs_nfs_port(struct mount_options *options, unsigned long *port)
 	return 1;
 }
 
+#ifdef IPV6_SUPPORTED
+sa_family_t	config_default_family = AF_UNSPEC;
+
+static int
+nfs_verify_family(sa_family_t family)
+{
+	return 1;
+}
+#else /* IPV6_SUPPORTED */
+sa_family_t	config_default_family = AF_INET;
+
+static int
+nfs_verify_family(sa_family_t family)
+{
+	if (family != AF_INET)
+		return 0;
+
+	return 1;
+}
+#endif /* IPV6_SUPPORTED */
+
 /*
  * Returns TRUE and fills in @family if a valid NFS protocol option
- * is found, or FALSE if the option was specified with an invalid value.
+ * is found, or FALSE if the option was specified with an invalid value
+ * or if the protocol family isn't supported. On error, errno is set.
  */
 int nfs_nfs_proto_family(struct mount_options *options,
 				sa_family_t *family)
 {
 	unsigned long protocol;
 	char *option;
-
-#ifdef IPV6_SUPPORTED
-	*family = AF_UNSPEC;
-#else
-	*family = AF_INET;
-#endif
+	sa_family_t tmp_family = config_default_family;
 
 	switch (po_rightmost(options, nfs_transport_opttbl)) {
 	case 0:	/* udp */
@@ -1354,15 +1372,18 @@ int nfs_nfs_proto_family(struct mount_options *options,
 		return 1;
 	case 2: /* proto */
 		option = po_get(options, "proto");
-		if (option != NULL)
-			return nfs_get_proto(option, family, &protocol);
+		if (option != NULL &&
+		    !nfs_get_proto(option, &tmp_family, &protocol))
+			goto out_err;
 	}
 
-	/*
-	 * NFS transport protocol wasn't specified.  Return the
-	 * default address family.
-	 */
+	if (!nfs_verify_family(tmp_family))
+		goto out_err;
+	*family = tmp_family;
 	return 1;
+out_err:
+	errno = EAFNOSUPPORT;
+	return 0;
 }
 
 /*
@@ -1480,23 +1501,25 @@ nfs_mount_port(struct mount_options *options, unsigned long *port)
 
 /*
  * Returns TRUE and fills in @family if a valid MNT protocol option
- * is found, or FALSE if the option was specified with an invalid value.
+ * is found, or FALSE if the option was specified with an invalid value
+ * or if the protocol family isn't supported. On error, errno is set.
  */
 int nfs_mount_proto_family(struct mount_options *options,
 				sa_family_t *family)
 {
 	unsigned long protocol;
 	char *option;
-
-#ifdef HAVE_LIBTIRPC
-	*family = AF_UNSPEC;
-#else
-	*family = AF_INET;
-#endif
+	sa_family_t tmp_family = config_default_family;
 
 	option = po_get(options, "mountproto");
-	if (option != NULL)
-		return nfs_get_proto(option, family, &protocol);
+	if (option != NULL) {
+		if (!nfs_get_proto(option, &tmp_family, &protocol))
+			goto out_err;
+		if (!nfs_verify_family(tmp_family))
+			goto out_err;
+		*family = tmp_family;
+		return 1;
+	}
 
 	/*
 	 * MNT transport protocol wasn't specified.  If the NFS
@@ -1505,6 +1528,9 @@ int nfs_mount_proto_family(struct mount_options *options,
 	 * NFS.
 	 */
 	return nfs_nfs_proto_family(options, family);
+out_err:
+	errno = EAFNOSUPPORT;
+	return 0;
 }
 
 /**