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Merge remote-tracking branch 'ffmancera/github/bug24573'

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This commit is contained in:
Nick Mathewson 2018-01-11 08:31:25 -05:00
commit 7a60600411
2 changed files with 57 additions and 9 deletions
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7
changes/ticket24573 Normal file
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@ -0,0 +1,7 @@
o Minor bugfixes (IPv6 preferences on bridges):
- Tor now always sets IPv6 preferences for bridges, even if there is only
router information or router status and warns about them. Fixes bug
24573; bugfix on c213f277cde in 0.2.8.2-alpha.
- Tor now sets IPv6 address in rs as well as it's set the one in ri. Closes
ticket 24572; bugfix on 9e9edf71f7d in 0.2.4.5-alpha.
Patch by "ffmancera".

59
src/or/bridges.c
View File

@ -719,7 +719,6 @@ rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
if (node->ri) {
routerinfo_t *ri = node->ri;
tor_addr_from_ipv4h(&addr, ri->addr);
if ((!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
bridge->port == ri->or_port) ||
(!tor_addr_compare(&bridge->addr, &ri->ipv6_addr, CMP_EXACT) &&
@ -777,16 +776,58 @@ rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
routerstatus_t *rs = node->rs;
tor_addr_from_ipv4h(&addr, rs->addr);
if (!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
bridge->port == rs->or_port) {
if ((!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
bridge->port == rs->or_port) ||
(!tor_addr_compare(&bridge->addr, &rs->ipv6_addr, CMP_EXACT) &&
bridge->port == rs->ipv6_orport)) {
/* they match, so no need to do anything */
} else {
rs->addr = tor_addr_to_ipv4h(&bridge->addr);
rs->or_port = bridge->port;
log_info(LD_DIR,
"Adjusted bridge routerstatus for '%s' to match "
"configured address %s.",
rs->nickname, fmt_addrport(&bridge->addr, rs->or_port));
if (tor_addr_family(&bridge->addr) == AF_INET) {
rs->addr = tor_addr_to_ipv4h(&bridge->addr);
rs->or_port = bridge->port;
log_info(LD_DIR,
"Adjusted bridge routerstatus for '%s' to match "
"configured address %s.",
rs->nickname, fmt_addrport(&bridge->addr, rs->or_port));
/* set IPv6 preferences even if there is no ri */
} else if (tor_addr_family(&bridge->addr) == AF_INET6) {
tor_addr_copy(&rs->ipv6_addr, &bridge->addr);
rs->ipv6_orport = bridge->port;
log_info(LD_DIR,
"Adjusted bridge routerstatus for '%s' to match configured"
" address %s.",
rs->nickname, fmt_addrport(&rs->ipv6_addr, rs->ipv6_orport));
} else {
log_err(LD_BUG, "Address family not supported: %d.",
tor_addr_family(&bridge->addr));
return;
}
}
if (options->ClientPreferIPv6ORPort == -1) {
/* Mark which address to use based on which bridge_t we got. */
node->ipv6_preferred = (tor_addr_family(&bridge->addr) == AF_INET6 &&
!tor_addr_is_null(&node->rs->ipv6_addr));
} else {
/* Mark which address to use based on user preference */
node->ipv6_preferred = (fascist_firewall_prefer_ipv6_orport(options) &&
!tor_addr_is_null(&node->rs->ipv6_addr));
}
/* XXXipv6 we lack support for falling back to another address for
the same relay, warn the user */
if (!tor_addr_is_null(&rs->ipv6_addr)) {
tor_addr_port_t ap;
node_get_pref_orport(node, &ap);
log_notice(LD_CONFIG,
"Bridge '%s' has both an IPv4 and an IPv6 address. "
"Will prefer using its %s address (%s) based on %s.",
rs->nickname,
node->ipv6_preferred ? "IPv6" : "IPv4",
fmt_addrport(&ap.addr, ap.port),
options->ClientPreferIPv6ORPort == -1 ?
"the configured Bridge address" :
"ClientPreferIPv6ORPort");
}
}
}