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Extract ExitPolicy-and-IPv6Exit check into a new function

Browse Source 
(I've done this instead of changing the semantics of
router_compare_to_my_exit_policy, because dns.c uses
router_compare_to_my_exit_policy too, in a slightly weird way.)
This commit is contained in:
Nick Mathewson
2016-10-14 09:08:51 -04:00
parent 785176e975
commit 87865c8aca
1 changed files with 24 additions and 10 deletions
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src/or/connection_edge.c
+24 -10
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@@ -3218,6 +3218,24 @@ connection_exit_begin_resolve(cell_t *cell, or_circuit_t *circ)
return 0;
}
/** Helper: Return true and set *<b>why_rejected</b> to an optional clarifying
* message message iff we do not allow connections to <b>addr</b>:<b>port</b>.
*/
static int
my_exit_policy_rejects(const tor_addr_t *addr,
uint16_t port,
const char **why_rejected)
{
if (router_compare_to_my_exit_policy(addr, port)) {
*why_rejected = "";
return 1;
} else if (tor_addr_family(addr) == AF_INET6 && !get_options()->IPv6Exit) {
*why_rejected = " (IPv6 address without IPv6Exit configured)";
return 1;
}
return 0;
}
/** Connect to conn's specified addr and port. If it worked, conn
* has now been added to the connection_array.
*
@@ -3234,17 +3252,13 @@ connection_exit_connect(edge_connection_t *edge_conn)
int socket_error = 0, result;
const char *why_failed_exit_policy = NULL;
if (! connection_edge_is_rendezvous_stream(edge_conn)) {
/* only apply exit policy to non-rendezvous connections. */
if (router_compare_to_my_exit_policy(&edge_conn->base_.addr,
edge_conn->base_.port)) {
/* Apply exit policy to non-rendezvous connections. */
if (! connection_edge_is_rendezvous_stream(edge_conn) &&
my_exit_policy_rejects(&edge_conn->base_.addr,
edge_conn->base_.port,
&why_failed_exit_policy)) {
if (BUG(!why_failed_exit_policy))
why_failed_exit_policy = "";
} else if (tor_addr_family(&conn->addr) == AF_INET6 &&
! get_options()->IPv6Exit) {
why_failed_exit_policy = " (IPv6 address without IPv6Exit configured)";
}
}
if (why_failed_exit_policy) {
log_info(LD_EXIT,"%s:%d failed exit policy%s. Closing.",
escaped_safe_str_client(conn->address), conn->port,
why_failed_exit_policy);