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control EXTENDCIRCUIT: check node_has_preferred_descriptor(). 

Suggested by teor during code review for 25691.
This commit is contained in:
Nick Mathewson 2018-04-22 12:27:21 -04:00
parent f1c1328f85
commit 0941c8bfe6
1 changed files with 6 additions and 3 deletions
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9
src/or/control.c
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@ -3492,17 +3492,19 @@ handle_control_extendcircuit(control_connection_t *conn, uint32_t len,
smartlist_free(args);
nodes = smartlist_new();
int first_node = zero_circ;
SMARTLIST_FOREACH_BEGIN(router_nicknames, const char *, n) {
const node_t *node = node_get_by_nickname(n, 0);
if (!node) {
connection_printf_to_buf(conn, "552 No such router \"%s\"\r\n", n);
goto done;
}
if (!node_has_any_descriptor(node)) {
if (!node_has_preferred_descriptor(node, first_node)) {
connection_printf_to_buf(conn, "552 No descriptor for \"%s\"\r\n", n);
goto done;
}
smartlist_add(nodes, (void*)node);
first_node = 0;
} SMARTLIST_FOREACH_END(n);
if (!smartlist_len(nodes)) {
connection_write_str_to_buf("512 No router names provided\r\n", conn);
@ -3515,14 +3517,15 @@ handle_control_extendcircuit(control_connection_t *conn, uint32_t len,
}
/* now circ refers to something that is ready to be extended */
int first_node = zero_circ;
first_node = zero_circ;
SMARTLIST_FOREACH(nodes, const node_t *, node,
{
extend_info_t *info = extend_info_from_node(node, first_node);
if (!info) {
tor_assert_nonfatal(first_node);
log_warn(LD_CONTROL,
"controller tried to connect to a node that doesn't have any "
"controller tried to connect to a node that lacks a suitable "
"descriptor, or which doesn't have any "
"addresses that are allowed by the firewall configuration; "
"circuit marked for closing.");
circuit_mark_for_close(TO_CIRCUIT(circ), -END_CIRC_REASON_CONNECTFAILED);