.type = BLOBMSG_TYPE_STRING },
};
+/*
+ * Validate a uci name
+ */
+static bool
+rpc_uci_verify_str(const char *name, bool extended, bool type)
+{
+ const char *c;
+ char *e;
+
+ if (!name || !*name)
+ return false;
+
+ if (extended && *name != '@')
+ extended = false;
+
+ for (c = name + extended; *c; c++)
+ if (!isalnum(*c) && *c != '_' && ((!type && !extended) || *c != '-'))
+ break;
+
+ if (extended) {
+ if (*c != '[')
+ return false;
+
+ strtol(++c, &e, 10);
+
+ return (e > c && *e == ']' && *(e+1) == 0);
+ }
+
+ return (*c == 0);
+}
+
+/*
+ * Check that string is a valid, shell compatible uci name
+ */
+static bool rpc_uci_verify_name(const char *name) {
+ return rpc_uci_verify_str(name, false, false);
+}
+
+/*
+ * Check that string is a valid section type name
+ */
+static bool rpc_uci_verify_type(const char *type) {
+ return rpc_uci_verify_str(type, false, true);
+}
+
+/*
+ * Check that the string is a valid section id, optionally in extended
+ * lookup notation
+ */
+static bool rpc_uci_verify_section(const char *section) {
+ return rpc_uci_verify_str(section, true, false);
+}
+
+
/*
* Turn uci error state into ubus return code
*/
}
/*
- * Setup per-session delta save directory. If the passed "sid" blob attribute
- * pointer is NULL then the precedure was not invoked through the ubus-rpc so
- * we do not perform session isolation and use the default save directory.
+ * Clear all save directories from the uci cursor and append the given path
+ * as new save directory.
*/
static void
-rpc_uci_set_savedir(struct blob_attr *sid)
+rpc_uci_replace_savedir(const char *path)
{
struct uci_element *e, *tmp;
- char path[PATH_MAX];
- uci_foreach_element_safe(&cursor->delta_path, tmp, e)
+ uci_foreach_element_safe(&cursor->delta_path, tmp, e) {
+ if (e->name)
+ free(e->name);
+
free(e);
+ }
cursor->delta_path.prev = &cursor->delta_path;
cursor->delta_path.next = &cursor->delta_path;
+ if (path)
+ uci_set_savedir(cursor, path);
+}
+
+/*
+ * Setup per-session delta save directory. If the passed "sid" blob attribute
+ * pointer is NULL then the precedure was not invoked through the ubus-rpc so
+ * we do not perform session isolation and use the default save directory.
+ */
+static void
+rpc_uci_set_savedir(struct blob_attr *sid)
+{
+ char path[PATH_MAX];
+
if (!sid)
{
- uci_set_savedir(cursor, "/tmp/.uci");
+ rpc_uci_replace_savedir("/tmp/.uci");
return;
}
snprintf(path, sizeof(path) - 1,
RPC_UCI_SAVEDIR_PREFIX "%s", blobmsg_get_string(sid));
- uci_set_savedir(cursor, path);
+ rpc_uci_replace_savedir(path);
}
/*
struct uci_package *p = NULL;
struct uci_section *s;
struct uci_ptr ptr = { 0 };
- int rem, rem2;
+ int rem, rem2, err = 0;
blobmsg_parse(rpc_uci_add_policy, __RPC_A_MAX, tb,
blob_data(msg), blob_len(msg));
if (!rpc_uci_write_access(tb[RPC_A_SESSION], tb[RPC_A_CONFIG]))
return UBUS_STATUS_PERMISSION_DENIED;
+ if (!rpc_uci_verify_type(blobmsg_data(tb[RPC_A_TYPE])))
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ if (tb[RPC_A_NAME] &&
+ !rpc_uci_verify_name(blobmsg_data(tb[RPC_A_NAME])))
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
ptr.package = blobmsg_data(tb[RPC_A_CONFIG]);
if (uci_load(cursor, ptr.package, &p))
ptr.o = NULL;
ptr.option = blobmsg_name(cur);
+ if (!rpc_uci_verify_name(ptr.option))
+ {
+ if (!err)
+ err = UBUS_STATUS_INVALID_ARGUMENT;
+
+ continue;
+ }
+
if (rpc_uci_lookup(&ptr) || !ptr.s)
+ {
+ if (!err)
+ err = UBUS_STATUS_NOT_FOUND;
+
continue;
+ }
switch (blobmsg_type(cur))
{
case BLOBMSG_TYPE_ARRAY:
blobmsg_for_each_attr(elem, cur, rem2)
- if (rpc_uci_format_blob(elem, &ptr.value))
- uci_add_list(cursor, &ptr);
+ {
+ if (!rpc_uci_format_blob(elem, &ptr.value))
+ {
+ if (!err)
+ err = UBUS_STATUS_INVALID_ARGUMENT;
+
+ continue;
+ }
+
+ uci_add_list(cursor, &ptr);
+ }
+
break;
default:
- if (rpc_uci_format_blob(cur, &ptr.value))
+ if (!rpc_uci_format_blob(cur, &ptr.value))
+ {
+ if (!err)
+ err = UBUS_STATUS_INVALID_ARGUMENT;
+ }
+ else
+ {
uci_set(cursor, &ptr);
+ }
+
break;
}
}
}
- uci_save(cursor, p);
+ if (!err)
+ {
+ uci_save(cursor, p);
- blob_buf_init(&buf, 0);
- blobmsg_add_string(&buf, "section", ptr.section);
- ubus_send_reply(ctx, req, buf.head);
+ blob_buf_init(&buf, 0);
+ blobmsg_add_string(&buf, "section", ptr.section);
+ ubus_send_reply(ctx, req, buf.head);
+ }
out:
uci_unload(cursor, p);
- return rpc_uci_status();
+ return err ? err : rpc_uci_status();
}
/*
ptr->option = blobmsg_name(opt);
ptr->value = NULL;
+ if (!rpc_uci_verify_name(ptr->option))
+ return;
+
if (rpc_uci_lookup(ptr) || !ptr->s)
return;
if (!rpc_uci_write_access(tb[RPC_S_SESSION], tb[RPC_S_CONFIG]))
return UBUS_STATUS_PERMISSION_DENIED;
+ if (tb[RPC_S_SECTION] &&
+ !rpc_uci_verify_section(blobmsg_data(tb[RPC_S_SECTION])))
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
ptr.package = blobmsg_data(tb[RPC_S_CONFIG]);
if (uci_load(cursor, ptr.package, &p))
ptr.section = blobmsg_data(tb[RPC_R_SECTION]);
ptr.value = blobmsg_data(tb[RPC_R_NAME]);
+ if (!rpc_uci_verify_name(ptr.value))
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
if (tb[RPC_R_OPTION])
ptr.option = blobmsg_data(tb[RPC_R_OPTION]);
struct blob_attr *cur;
struct uci_package *p = NULL;
struct uci_ptr ptr = { 0 };
- int rem, i = 1;
+ int rem, i = 0;
blobmsg_parse(rpc_uci_order_policy, __RPC_O_MAX, tb,
blob_data(msg), blob_len(msg));
fclose(out);
}
+static int
+rpc_uci_apply_access(const char *sid, glob_t *gl)
+{
+ struct stat s;
+ int i, c = 0;
+
+ if (gl->gl_pathc < 3)
+ return UBUS_STATUS_NO_DATA;
+
+ for (i = 0; i < gl->gl_pathc; i++) {
+ char *config = basename(gl->gl_pathv[i]);
+
+ if (*config == '.')
+ continue;
+ if (stat(gl->gl_pathv[i], &s) || !s.st_size)
+ continue;
+ if (!rpc_session_access(sid, "uci", config, "write"))
+ return UBUS_STATUS_PERMISSION_DENIED;
+ c++;
+ }
+
+ if (!c)
+ return UBUS_STATUS_NO_DATA;
+
+ return 0;
+}
+
static void
-rpc_uci_do_rollback(struct ubus_context *ctx, const char *sid, glob_t *gl)
+rpc_uci_do_rollback(struct ubus_context *ctx, glob_t *gl)
{
- int i;
+ int i, deny;
char tmp[PATH_MAX];
- if (sid) {
- snprintf(tmp, sizeof(tmp), RPC_UCI_SAVEDIR_PREFIX "%s/", sid);
+ /* Test apply permission to see if the initiator session still exists.
+ * If it does, restore the delta files as well, else just restore the
+ * main configuration files. */
+ deny = apply_sid[0]
+ ? rpc_uci_apply_access(apply_sid, gl) : UBUS_STATUS_NOT_FOUND;
+
+ if (!deny) {
+ snprintf(tmp, sizeof(tmp), RPC_UCI_SAVEDIR_PREFIX "%s/", apply_sid);
mkdir(tmp, 0700);
}
+ /* avoid merging unrelated uci changes when restoring old configs */
+ rpc_uci_replace_savedir("/dev/null");
+
for (i = 0; i < gl->gl_pathc; i++) {
char *config = basename(gl->gl_pathv[i]);
rpc_uci_copy_file(RPC_SNAPSHOT_FILES, RPC_UCI_DIR, config);
rpc_uci_apply_config(ctx, config);
- if (sid)
- rpc_uci_copy_file(RPC_SNAPSHOT_DELTA, tmp, config);
+
+ if (deny)
+ continue;
+
+ rpc_uci_copy_file(RPC_SNAPSHOT_DELTA, tmp, config);
}
rpc_uci_purge_dir(RPC_SNAPSHOT_FILES);
if (glob(tmp, GLOB_PERIOD, NULL, &gl) < 0)
return;
- rpc_uci_do_rollback(apply_ctx, NULL, &gl);
-}
-
-static int
-rpc_uci_apply_access(const char *sid, glob_t *gl)
-{
- struct stat s;
- int i, c = 0;
-
- if (gl->gl_pathc < 3)
- return UBUS_STATUS_NO_DATA;
-
- for (i = 0; i < gl->gl_pathc; i++) {
- char *config = basename(gl->gl_pathv[i]);
+ rpc_uci_do_rollback(apply_ctx, &gl);
- if (*config == '.')
- continue;
- if (stat(gl->gl_pathv[i], &s) || !s.st_size)
- continue;
- if (!rpc_session_access(sid, "uci", config, "write"))
- return UBUS_STATUS_PERMISSION_DENIED;
- c++;
- }
-
- if (!c)
- return UBUS_STATUS_NO_DATA;
-
- return 0;
+ globfree(&gl);
}
static int
rpc_uci_purge_dir(RPC_SNAPSHOT_DELTA);
if (!apply_sid[0]) {
+ rpc_uci_set_savedir(tb[RPC_T_SESSION]);
+
mkdir(RPC_SNAPSHOT_FILES, 0700);
mkdir(RPC_SNAPSHOT_DELTA, 0700);
if (glob(tmp, GLOB_PERIOD, NULL, &gl) < 0)
return UBUS_STATUS_NOT_FOUND;
- rpc_uci_do_rollback(ctx, sid, &gl);
+ rpc_uci_do_rollback(ctx, &gl);
globfree(&gl);
projects / project / rpcd.git / blobdiff