Add parent-dir validation for --no-inc-recurse too.

flist.c

@@ -2502,8 +2502,8 @@ struct file_list *recv_file_list(int f, int dir_ndx)
 				const char *d = dir_ndx >= 0 ? f_name(dir_flist->files[dir_ndx], NULL) : empty_dir;
 				if (strcmp(cur_dir, d) != 0) {
 					rprintf(FERROR,
-						"ABORTING due to invalid dir prefix from sender: %s (should be: %s)\n",
-						cur_dir, d);
+						"ABORTING due to invalid path from sender: %s/%s\n",
+						cur_dir, file->basename);
 					exit_cleanup(RERR_PROTOCOL);
 				}
 				good_dirname = cur_dir;
@@ -2689,6 +2689,34 @@ int flist_find(struct file_list *flist, struct file_struct *f)
 	return -1;
 }
 
+/* Search for a name in the file list.  You must specify want_dir_match as:
+ * 1=match directories, 0=match non-directories, or -1=match either. */
+int flist_find_name(struct file_list *flist, const char *fname, int want_dir_match)
+{
+	struct { /* We have to create a temporary file_struct for the search. */
+		struct file_struct f;
+		char name_space[MAXPATHLEN];
+	} t;
+	char fbuf[MAXPATHLEN];
+	const char *slash = strrchr(fname, '/');
+	const char *basename = slash ? slash+1 : fname;
+
+	memset(&t.f, 0, FILE_STRUCT_LEN);
+	memcpy((void *)t.f.basename, basename, strlen(basename)+1);
+
+	if (slash) {
+		strlcpy(fbuf, fname, slash - fname + 1);
+		t.f.dirname = fbuf;
+	} else
+		t.f.dirname = NULL;
+
+	t.f.mode = want_dir_match > 0 ? S_IFDIR : S_IFREG;
+
+	if (want_dir_match < 0)
+		return flist_find_ignore_dirness(flist, &t.f);
+	return flist_find(flist, &t.f);
+}
+
 /* Search for an identically-named item in the file list.  Differs from
  * flist_find in that an item that agrees with "f" in directory-ness is
  * preferred but one that does not is still found. */

generator.c

@@ -1177,6 +1177,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
 			   int itemizing, enum logcode code, int f_out)
 {
 	static const char *parent_dirname = "";
+	static struct file_struct *prior_dir_file = NULL;
 	/* Missing dir not created due to --dry-run; will still be scanned. */
 	static struct file_struct *dry_missing_dir = NULL;
 	/* Missing dir whose contents are skipped altogether due to
@@ -1256,6 +1257,18 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
 		const char *dn = file->dirname ? file->dirname : ".";
 		dry_missing_dir = NULL;
 		if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
+			/* Each parent dir must be in the file list or the flist data is bad.
+			 * Optimization: most of the time the parent dir will be the last dir
+			 * this function was asked to process in the file list. */
+			if (!inc_recurse
+			 && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
+			 && (prior_dir_file && strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
+			 && flist_find_name(cur_flist, dn, 1) < 0) {
+				rprintf(FERROR,
+					"ABORTING due to invalid path from sender: %s/%s\n",
+					dn, file->basename);
+				exit_cleanup(RERR_PROTOCOL);
+			}
 			if (relative_paths && !implied_dirs
 			 && do_stat(dn, &sx.st) < 0) {
 				if (dry_run)
@@ -1467,6 +1480,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
 			else
 				change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
 		}
+		prior_dir_file = file;
 		goto cleanup;
 	}