From be7afe658e5fc6745a369d6fb3fbc4bb6037da18 Mon Sep 17 00:00:00 2001 From: Rasmus Dahlberg Date: Wed, 12 Oct 2022 20:29:11 +0200 Subject: Clip DNS TTL values once in event callback This change ensures that other parts of the code base always operate on the same clipped TTL values, notably without being aware of clipping. --- src/core/or/connection_edge.c | 4 ++-- src/feature/relay/dns.c | 8 ++++---- src/test/test_cell_formats.c | 4 ++-- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/src/core/or/connection_edge.c b/src/core/or/connection_edge.c index d9067d5c29..b96f4eb211 100644 --- a/src/core/or/connection_edge.c +++ b/src/core/or/connection_edge.c @@ -546,7 +546,7 @@ connection_edge_end(edge_connection_t *conn, uint8_t reason) memcpy(payload+1, tor_addr_to_in6_addr8(&conn->base_.addr), 16); addrlen = 16; } - set_uint32(payload+1+addrlen, htonl(clip_dns_ttl(conn->address_ttl))); + set_uint32(payload+1+addrlen, htonl(conn->address_ttl)); payload_len += 4+addrlen; } @@ -911,7 +911,7 @@ connected_cell_format_payload(uint8_t *payload_out, return -1; } - set_uint32(payload_out + connected_payload_len, htonl(clip_dns_ttl(ttl))); + set_uint32(payload_out + connected_payload_len, htonl(ttl)); connected_payload_len += 4; tor_assert(connected_payload_len <= MAX_CONNECTED_CELL_PAYLOAD_LEN); diff --git a/src/feature/relay/dns.c b/src/feature/relay/dns.c index 71c6f56fb1..b15e5f30c7 100644 --- a/src/feature/relay/dns.c +++ b/src/feature/relay/dns.c @@ -496,7 +496,7 @@ send_resolved_cell,(edge_connection_t *conn, uint8_t answer_type, uint32_t ttl; buf[0] = answer_type; - ttl = clip_dns_ttl(conn->address_ttl); + ttl = conn->address_ttl; switch (answer_type) { @@ -568,7 +568,7 @@ send_resolved_hostname_cell,(edge_connection_t *conn, size_t namelen = strlen(hostname); tor_assert(namelen < 256); - ttl = clip_dns_ttl(conn->address_ttl); + ttl = conn->address_ttl; buf[0] = RESOLVED_TYPE_HOSTNAME; buf[1] = (uint8_t)namelen; @@ -1294,7 +1294,7 @@ make_pending_resolve_cached(cached_resolve_t *resolve) resolve->ttl_hostname < ttl) ttl = resolve->ttl_hostname; - set_expiry(new_resolve, time(NULL) + clip_dns_ttl(ttl)); + set_expiry(new_resolve, time(NULL) + ttl); } assert_cache_ok(); @@ -1637,7 +1637,7 @@ evdns_callback(int result, char type, int count, int ttl, void *addresses, } if (result != DNS_ERR_SHUTDOWN) dns_found_answer(string_address, orig_query_type, - result, &addr, hostname, ttl); + result, &addr, hostname, clip_dns_ttl(ttl)); tor_free(arg_); } diff --git a/src/test/test_cell_formats.c b/src/test/test_cell_formats.c index f9ff101c98..cae25d00ec 100644 --- a/src/test/test_cell_formats.c +++ b/src/test/test_cell_formats.c @@ -354,7 +354,7 @@ test_cfmt_connected_cells(void *arg) rh.length = connected_cell_format_payload(cell.payload+RELAY_HEADER_SIZE, &addr, 1024); tt_int_op(rh.length, OP_EQ, 8); - test_memeq_hex(cell.payload+RELAY_HEADER_SIZE, "1e28323c" "00000e10"); + test_memeq_hex(cell.payload+RELAY_HEADER_SIZE, "1e28323c" "00000400"); /* Try parsing it. */ tor_addr_make_unspec(&addr); @@ -362,7 +362,7 @@ test_cfmt_connected_cells(void *arg) tt_int_op(r, OP_EQ, 0); tt_int_op(tor_addr_family(&addr), OP_EQ, AF_INET); tt_str_op(fmt_addr(&addr), OP_EQ, "30.40.50.60"); - tt_int_op(ttl, OP_EQ, 3600); /* not 1024, since we clipped to 3600 */ + tt_int_op(ttl, OP_EQ, 1024); /* Try an IPv6 address */ memset(&rh, 0, sizeof(rh)); -- cgit v1.2.3-54-g00ecf