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Remove the return value from the fascist_firewall_choose_address_* family of functions
This commit is contained in:
parent
ddb2b965de
commit
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6
changes/ticket24734
Normal file
6
changes/ticket24734
Normal file
@ -0,0 +1,6 @@
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o Code simplification and refactoring:
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- Remove the return value for fascist_firewall_choose_address_base(),
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and sister functions such as fascist_firewall_choose_address_node()
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and fascist_firewall_choose_address_rs(). Also, while we're here,
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initialize the ap argument as leaving it uninitialized can pose a
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security hazard. Closes ticket 24734. Patch by Neel Chauhan.
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@ -2802,16 +2802,13 @@ extend_info_from_node(const node_t *node, int for_direct_connect)
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return NULL;
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return NULL;
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}
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}
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/* Choose a preferred address first, but fall back to an allowed address.
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/* Choose a preferred address first, but fall back to an allowed address. */
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* choose_address returns 1 on success, but get_prim_orport returns 0. */
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if (for_direct_connect)
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if (for_direct_connect)
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valid_addr = fascist_firewall_choose_address_node(node,
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fascist_firewall_choose_address_node(node, FIREWALL_OR_CONNECTION, 0, &ap);
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FIREWALL_OR_CONNECTION,
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0, &ap);
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else {
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else {
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node_get_prim_orport(node, &ap);
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node_get_prim_orport(node, &ap);
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valid_addr = tor_addr_port_is_valid_ap(&ap, 0);
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}
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}
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valid_addr = tor_addr_port_is_valid_ap(&ap, 0);
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if (valid_addr)
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if (valid_addr)
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log_debug(LD_CIRC, "using %s for %s",
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log_debug(LD_CIRC, "using %s for %s",
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@ -794,9 +794,9 @@ directory_choose_address_routerstatus(const routerstatus_t *status,
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* Use the preferred address and port if they are reachable, otherwise,
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* Use the preferred address and port if they are reachable, otherwise,
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* use the alternate address and port (if any).
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* use the alternate address and port (if any).
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*/
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*/
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have_or = fascist_firewall_choose_address_rs(status,
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fascist_firewall_choose_address_rs(status, FIREWALL_OR_CONNECTION, 0,
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FIREWALL_OR_CONNECTION, 0,
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use_or_ap);
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use_or_ap);
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have_or = tor_addr_port_is_valid_ap(use_or_ap, 0);
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}
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}
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/* DirPort connections
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/* DirPort connections
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@ -805,9 +805,9 @@ directory_choose_address_routerstatus(const routerstatus_t *status,
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indirection == DIRIND_ANON_DIRPORT ||
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indirection == DIRIND_ANON_DIRPORT ||
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(indirection == DIRIND_ONEHOP
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(indirection == DIRIND_ONEHOP
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&& !directory_must_use_begindir(options))) {
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&& !directory_must_use_begindir(options))) {
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have_dir = fascist_firewall_choose_address_rs(status,
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fascist_firewall_choose_address_rs(status, FIREWALL_DIR_CONNECTION, 0,
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FIREWALL_DIR_CONNECTION, 0,
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use_dir_ap);
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use_dir_ap);
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have_dir = tor_addr_port_is_valid_ap(use_dir_ap, 0);
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}
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}
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/* We rejected all addresses in the relay's status. This means we can't
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/* We rejected all addresses in the relay's status. This means we can't
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@ -825,9 +825,8 @@ fascist_firewall_choose_address(const tor_addr_port_t *a,
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* If pref_only, only choose preferred addresses. In either case, choose
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* If pref_only, only choose preferred addresses. In either case, choose
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* a preferred address before an address that's not preferred.
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* a preferred address before an address that's not preferred.
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* If both addresses could be chosen (they are both preferred or both allowed)
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* If both addresses could be chosen (they are both preferred or both allowed)
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* choose IPv6 if pref_ipv6 is true, otherwise choose IPv4.
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* choose IPv6 if pref_ipv6 is true, otherwise choose IPv4. */
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* If neither address is chosen, return 0, else return 1. */
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static void
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static int
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fascist_firewall_choose_address_base(const tor_addr_t *ipv4_addr,
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fascist_firewall_choose_address_base(const tor_addr_t *ipv4_addr,
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uint16_t ipv4_orport,
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uint16_t ipv4_orport,
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uint16_t ipv4_dirport,
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uint16_t ipv4_dirport,
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@ -868,15 +867,12 @@ fascist_firewall_choose_address_base(const tor_addr_t *ipv4_addr,
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if (result) {
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if (result) {
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tor_addr_copy(&ap->addr, &result->addr);
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tor_addr_copy(&ap->addr, &result->addr);
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ap->port = result->port;
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ap->port = result->port;
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return 1;
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} else {
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return 0;
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}
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}
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}
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}
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/** Like fascist_firewall_choose_address_base(), but takes a host-order IPv4
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/** Like fascist_firewall_choose_address_base(), but takes a host-order IPv4
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* address as the first parameter. */
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* address as the first parameter. */
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static int
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static void
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fascist_firewall_choose_address_ipv4h(uint32_t ipv4h_addr,
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fascist_firewall_choose_address_ipv4h(uint32_t ipv4h_addr,
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uint16_t ipv4_orport,
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uint16_t ipv4_orport,
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uint16_t ipv4_dirport,
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uint16_t ipv4_dirport,
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@ -895,11 +891,11 @@ fascist_firewall_choose_address_ipv4h(uint32_t ipv4h_addr,
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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ap->port = 0;
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ap->port = 0;
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return fascist_firewall_choose_address_base(&ipv4_addr, ipv4_orport,
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fascist_firewall_choose_address_base(&ipv4_addr, ipv4_orport,
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ipv4_dirport, ipv6_addr,
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ipv4_dirport, ipv6_addr,
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ipv6_orport, ipv6_dirport,
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ipv6_orport, ipv6_dirport,
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fw_connection, pref_only,
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fw_connection, pref_only,
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pref_ipv6, ap);
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pref_ipv6, ap);
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}
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}
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/* Some microdescriptor consensus methods have no IPv6 addresses in rs: they
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/* Some microdescriptor consensus methods have no IPv6 addresses in rs: they
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@ -950,26 +946,25 @@ node_awaiting_ipv6(const or_options_t* options, const node_t *node)
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* This should only happen when there's no valid consensus, and rs doesn't
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* This should only happen when there's no valid consensus, and rs doesn't
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* correspond to a bridge client's bridge.
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* correspond to a bridge client's bridge.
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*/
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*/
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int
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void
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fascist_firewall_choose_address_rs(const routerstatus_t *rs,
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fascist_firewall_choose_address_rs(const routerstatus_t *rs,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only, tor_addr_port_t* ap)
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int pref_only, tor_addr_port_t* ap)
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{
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{
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if (!rs) {
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return 0;
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}
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tor_assert(ap);
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tor_assert(ap);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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ap->port = 0;
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ap->port = 0;
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if (!rs) {
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return;
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}
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const or_options_t *options = get_options();
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const or_options_t *options = get_options();
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const node_t *node = node_get_by_id(rs->identity_digest);
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const node_t *node = node_get_by_id(rs->identity_digest);
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if (node && !node_awaiting_ipv6(options, node)) {
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if (node && !node_awaiting_ipv6(options, node)) {
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return fascist_firewall_choose_address_node(node, fw_connection, pref_only,
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fascist_firewall_choose_address_node(node, fw_connection, pref_only, ap);
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ap);
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} else {
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} else {
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/* There's no node-specific IPv6 preference, so use the generic IPv6
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/* There's no node-specific IPv6 preference, so use the generic IPv6
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* preference instead. */
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* preference instead. */
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@ -979,37 +974,31 @@ fascist_firewall_choose_address_rs(const routerstatus_t *rs,
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/* Assume IPv4 and IPv6 DirPorts are the same.
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/* Assume IPv4 and IPv6 DirPorts are the same.
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* Assume the IPv6 OR and Dir addresses are the same. */
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* Assume the IPv6 OR and Dir addresses are the same. */
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return fascist_firewall_choose_address_ipv4h(rs->addr,
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fascist_firewall_choose_address_ipv4h(rs->addr, rs->or_port, rs->dir_port,
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rs->or_port,
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&rs->ipv6_addr, rs->ipv6_orport,
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rs->dir_port,
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rs->dir_port, fw_connection,
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&rs->ipv6_addr,
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pref_only, pref_ipv6, ap);
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rs->ipv6_orport,
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rs->dir_port,
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fw_connection,
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pref_only,
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pref_ipv6,
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ap);
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}
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}
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}
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}
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/** Like fascist_firewall_choose_address_base(), but takes <b>node</b>, and
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/** Like fascist_firewall_choose_address_base(), but takes <b>node</b>, and
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* looks up the node's IPv6 preference rather than taking an argument
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* looks up the node's IPv6 preference rather than taking an argument
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* for pref_ipv6. */
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* for pref_ipv6. */
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int
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void
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fascist_firewall_choose_address_node(const node_t *node,
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fascist_firewall_choose_address_node(const node_t *node,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only, tor_addr_port_t *ap)
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int pref_only, tor_addr_port_t *ap)
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{
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{
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if (!node) {
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return 0;
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}
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node_assert_ok(node);
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tor_assert(ap);
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tor_assert(ap);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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ap->port = 0;
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ap->port = 0;
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if (!node) {
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return;
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}
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node_assert_ok(node);
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/* Calling fascist_firewall_choose_address_node() when the node is missing
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/* Calling fascist_firewall_choose_address_node() when the node is missing
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* IPv6 information breaks IPv6-only clients.
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* IPv6 information breaks IPv6-only clients.
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* If the node is a hard-coded fallback directory or authority, call
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* If the node is a hard-coded fallback directory or authority, call
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@ -1019,7 +1008,7 @@ fascist_firewall_choose_address_node(const node_t *node,
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* descriptor (routerinfo), or is one of our configured bridges before
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* descriptor (routerinfo), or is one of our configured bridges before
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* calling this function. */
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* calling this function. */
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if (BUG(node_awaiting_ipv6(get_options(), node))) {
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if (BUG(node_awaiting_ipv6(get_options(), node))) {
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return 0;
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return;
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}
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}
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const int pref_ipv6_node = (fw_connection == FIREWALL_OR_CONNECTION
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const int pref_ipv6_node = (fw_connection == FIREWALL_OR_CONNECTION
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@ -1037,41 +1026,36 @@ fascist_firewall_choose_address_node(const node_t *node,
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node_get_pref_ipv6_dirport(node, &ipv6_dir_ap);
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node_get_pref_ipv6_dirport(node, &ipv6_dir_ap);
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/* Assume the IPv6 OR and Dir addresses are the same. */
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/* Assume the IPv6 OR and Dir addresses are the same. */
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return fascist_firewall_choose_address_base(&ipv4_or_ap.addr,
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fascist_firewall_choose_address_base(&ipv4_or_ap.addr, ipv4_or_ap.port,
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ipv4_or_ap.port,
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ipv4_dir_ap.port, &ipv6_or_ap.addr,
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ipv4_dir_ap.port,
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ipv6_or_ap.port, ipv6_dir_ap.port,
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&ipv6_or_ap.addr,
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fw_connection, pref_only,
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ipv6_or_ap.port,
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pref_ipv6_node, ap);
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ipv6_dir_ap.port,
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fw_connection,
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pref_only,
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pref_ipv6_node,
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ap);
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}
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}
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/** Like fascist_firewall_choose_address_rs(), but takes <b>ds</b>. */
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/** Like fascist_firewall_choose_address_rs(), but takes <b>ds</b>. */
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int
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void
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fascist_firewall_choose_address_dir_server(const dir_server_t *ds,
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fascist_firewall_choose_address_dir_server(const dir_server_t *ds,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only,
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int pref_only,
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tor_addr_port_t *ap)
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tor_addr_port_t *ap)
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{
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{
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if (!ds) {
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return 0;
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}
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tor_assert(ap);
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tor_assert(ap);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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tor_addr_make_null(&ap->addr, AF_UNSPEC);
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ap->port = 0;
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ap->port = 0;
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if (!ds) {
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return;
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}
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/* A dir_server_t always has a fake_status. As long as it has the same
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/* A dir_server_t always has a fake_status. As long as it has the same
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* addresses/ports in both fake_status and dir_server_t, this works fine.
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* addresses/ports in both fake_status and dir_server_t, this works fine.
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* (See #17867.)
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* (See #17867.)
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* This function relies on fascist_firewall_choose_address_rs looking up the
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* This function relies on fascist_firewall_choose_address_rs looking up the
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* node if it can, because that will get the latest info for the relay. */
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* node if it can, because that will get the latest info for the relay. */
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return fascist_firewall_choose_address_rs(&ds->fake_status, fw_connection,
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fascist_firewall_choose_address_rs(&ds->fake_status, fw_connection,
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pref_only, ap);
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pref_only, ap);
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}
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}
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/** Return 1 if <b>addr</b> is permitted to connect to our dir port,
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/** Return 1 if <b>addr</b> is permitted to connect to our dir port,
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@ -55,13 +55,13 @@ int fascist_firewall_allows_dir_server(const dir_server_t *ds,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only);
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int pref_only);
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int fascist_firewall_choose_address_rs(const routerstatus_t *rs,
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void fascist_firewall_choose_address_rs(const routerstatus_t *rs,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only, tor_addr_port_t* ap);
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int pref_only, tor_addr_port_t* ap);
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int fascist_firewall_choose_address_node(const node_t *node,
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void fascist_firewall_choose_address_node(const node_t *node,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only, tor_addr_port_t* ap);
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int pref_only, tor_addr_port_t* ap);
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int fascist_firewall_choose_address_dir_server(const dir_server_t *ds,
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void fascist_firewall_choose_address_dir_server(const dir_server_t *ds,
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firewall_connection_t fw_connection,
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firewall_connection_t fw_connection,
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int pref_only, tor_addr_port_t* ap);
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int pref_only, tor_addr_port_t* ap);
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@ -1923,11 +1923,8 @@ test_policies_fascist_firewall_allows_address(void *arg)
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tor_addr_port_t chosen_rs_ap; \
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tor_addr_port_t chosen_rs_ap; \
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tor_addr_make_null(&chosen_rs_ap.addr, AF_INET); \
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tor_addr_make_null(&chosen_rs_ap.addr, AF_INET); \
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chosen_rs_ap.port = 0; \
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chosen_rs_ap.port = 0; \
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tt_int_op(fascist_firewall_choose_address_rs(&(fake_rs), \
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fascist_firewall_choose_address_rs(&(fake_rs), (fw_connection), \
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(fw_connection), \
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(pref_only), &chosen_rs_ap); \
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(pref_only), \
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&chosen_rs_ap), \
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OP_EQ, (expect_rv)); \
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tt_assert(tor_addr_eq(&(expect_ap).addr, &chosen_rs_ap.addr)); \
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tt_assert(tor_addr_eq(&(expect_ap).addr, &chosen_rs_ap.addr)); \
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tt_int_op((expect_ap).port, OP_EQ, chosen_rs_ap.port); \
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tt_int_op((expect_ap).port, OP_EQ, chosen_rs_ap.port); \
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STMT_END
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STMT_END
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@ -1940,11 +1937,8 @@ test_policies_fascist_firewall_allows_address(void *arg)
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tor_addr_port_t chosen_node_ap; \
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tor_addr_port_t chosen_node_ap; \
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tor_addr_make_null(&chosen_node_ap.addr, AF_INET); \
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tor_addr_make_null(&chosen_node_ap.addr, AF_INET); \
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chosen_node_ap.port = 0; \
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chosen_node_ap.port = 0; \
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tt_int_op(fascist_firewall_choose_address_node(&(fake_node), \
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fascist_firewall_choose_address_node(&(fake_node),(fw_connection), \
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(fw_connection), \
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(pref_only), &chosen_node_ap); \
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(pref_only), \
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&chosen_node_ap), \
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OP_EQ, (expect_rv)); \
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tt_assert(tor_addr_eq(&(expect_ap).addr, &chosen_node_ap.addr)); \
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tt_assert(tor_addr_eq(&(expect_ap).addr, &chosen_node_ap.addr)); \
|
||||||
tt_int_op((expect_ap).port, OP_EQ, chosen_node_ap.port); \
|
tt_int_op((expect_ap).port, OP_EQ, chosen_node_ap.port); \
|
||||||
STMT_END
|
STMT_END
|
||||||
|
Loading…
Reference in New Issue
Block a user