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relay: Refactor extend address validity function

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Rename the function, and give it a boolean return value.

No behaviour change.

Part of 33817.
This commit is contained in:
teor 2020-04-30 06:26:40 +10:00
parent cd7e2fc210
commit 496ddd2877
1 changed files with 30 additions and 29 deletions
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59
src/feature/relay/circuitbuild_relay.c
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@ -125,16 +125,17 @@ circuit_extend_add_ed25519_helper(struct extend_cell_t *ec)
/* Check if the address and port in the tor_addr_port_t <b>ap</b> are valid,
* and are allowed by the current ExtendAllowPrivateAddresses config.
*
* If they are valid, return 0.
* Otherwise, if they are invalid, return -1.
* If they are valid, return true.
* Otherwise, if they are invalid, return false.
*
* If <b>log_zero_addrs</b> is true, log warnings about zero addresses at
* <b>log_level</b>. If <b>log_internal_addrs</b> is true, log warnings about
* internal addresses at <b>log_level</b>.
*/
static int
circuit_extend_addr_port_helper(const struct tor_addr_port_t *ap,
bool log_zero_addrs, bool log_internal_addrs,
int log_level)
static bool
circuit_extend_addr_port_is_valid(const struct tor_addr_port_t *ap,
bool log_zero_addrs, bool log_internal_addrs,
int log_level)
{
/* It's safe to print the family. But we don't want to print the address,
* unless specifically configured to do so. (Zero addresses aren't sensitive,
@ -147,7 +148,7 @@ circuit_extend_addr_port_helper(const struct tor_addr_port_t *ap,
"%s address '%s'.",
fmt_addr_family(&ap->addr), safe_str(fmt_addrport_ap(ap)));
}
return -1;
return false;
}
if (tor_addr_is_internal(&ap->addr, 0) &&
@ -158,10 +159,10 @@ circuit_extend_addr_port_helper(const struct tor_addr_port_t *ap,
fmt_addr_family(&ap->addr),
safe_str(fmt_and_decorate_addr(&ap->addr)));
}
return -1;
return false;
}
return 0;
return true;
}
/* Before replying to an extend cell, check the link specifiers in the extend
@ -185,27 +186,27 @@ circuit_extend_lspec_valid_helper(const struct extend_cell_t *ec,
}
/* Check the addresses, without logging */
const int ipv4_valid =
(circuit_extend_addr_port_helper(&ec->orport_ipv4, false, false, 0) == 0);
const int ipv6_valid =
(circuit_extend_addr_port_helper(&ec->orport_ipv6, false, false, 0) == 0);
const int ipv4_valid = circuit_extend_addr_port_is_valid(&ec->orport_ipv4,
false, false, 0);
const int ipv6_valid = circuit_extend_addr_port_is_valid(&ec->orport_ipv6,
false, false, 0);
/* We need at least one valid address */
if (!ipv4_valid && !ipv6_valid) {
/* Now, log the invalid addresses at protocol warning level */
circuit_extend_addr_port_helper(&ec->orport_ipv4, true, true,
LOG_PROTOCOL_WARN);
circuit_extend_addr_port_helper(&ec->orport_ipv6, true, true,
LOG_PROTOCOL_WARN);
circuit_extend_addr_port_is_valid(&ec->orport_ipv4,
true, true, LOG_PROTOCOL_WARN);
circuit_extend_addr_port_is_valid(&ec->orport_ipv6,
true, true, LOG_PROTOCOL_WARN);
/* And fail */
return -1;
} else if (!ipv4_valid) {
/* Always log unexpected internal addresses, but go on to use the other
* valid address */
circuit_extend_addr_port_helper(&ec->orport_ipv4, false, true,
LOG_PROTOCOL_WARN);
circuit_extend_addr_port_is_valid(&ec->orport_ipv4,
false, true, LOG_PROTOCOL_WARN);
} else if (!ipv6_valid) {
circuit_extend_addr_port_helper(&ec->orport_ipv6, false, true,
LOG_PROTOCOL_WARN);
circuit_extend_addr_port_is_valid(&ec->orport_ipv6,
false, true, LOG_PROTOCOL_WARN);
}
IF_BUG_ONCE(circ->magic != OR_CIRCUIT_MAGIC) {
@ -316,10 +317,10 @@ circuit_open_connection_for_extend(const struct extend_cell_t *ec,
}
/* Check the addresses, without logging */
const int ipv4_valid =
(circuit_extend_addr_port_helper(&ec->orport_ipv4, false, false, 0) == 0);
const int ipv6_valid =
(circuit_extend_addr_port_helper(&ec->orport_ipv6, false, false, 0) == 0);
const int ipv4_valid = circuit_extend_addr_port_is_valid(&ec->orport_ipv4,
false, false, 0);
const int ipv6_valid = circuit_extend_addr_port_is_valid(&ec->orport_ipv6,
false, false, 0);
IF_BUG_ONCE(!ipv4_valid && !ipv6_valid) {
/* circuit_extend_lspec_valid_helper() should have caught this */
@ -412,10 +413,10 @@ circuit_extend(struct cell_t *cell, struct circuit_t *circ)
return -1;
/* Check the addresses, without logging */
const int ipv4_valid =
(circuit_extend_addr_port_helper(&ec.orport_ipv4, false, false, 0) == 0);
const int ipv6_valid =
(circuit_extend_addr_port_helper(&ec.orport_ipv6, false, false, 0) == 0);
const int ipv4_valid = circuit_extend_addr_port_is_valid(&ec.orport_ipv4,
false, false, 0);
const int ipv6_valid = circuit_extend_addr_port_is_valid(&ec.orport_ipv6,
false, false, 0);
IF_BUG_ONCE(!ipv4_valid && !ipv6_valid) {
/* circuit_extend_lspec_valid_helper() should have caught this */
return -1;