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Fix automapping to ipv6

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Bugfix on 0.2.4.7-alpha; fixes bug 10465.
This commit is contained in:
Nick Mathewson 2013-12-22 08:38:36 -05:00
parent 2c956f0c99
commit b9f6e40ecb
2 changed files with 41 additions and 8 deletions
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3
changes/bug10465 Normal file
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@ -0,0 +1,3 @@
o Major bugfixes:
- Fix assertion failure when AutomapHostsOnResolve yields an IPv6
address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.

46
src/or/connection_edge.c
View File

@ -61,6 +61,11 @@ static int connection_ap_process_natd(entry_connection_t *conn);
static int connection_exit_connect_dir(edge_connection_t *exitconn);
static int consider_plaintext_ports(entry_connection_t *conn, uint16_t port);
static int connection_ap_supports_optimistic_data(const entry_connection_t *);
static void connection_ap_handshake_socks_resolved_addr(
entry_connection_t *conn,
const tor_addr_t *answer,
int ttl,
time_t expires);
/** An AP stream has failed/finished. If it hasn't already sent back
* a socks reply, send one now (based on endreason). Also set
@ -1156,17 +1161,13 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
}
if (socks->command == SOCKS_COMMAND_RESOLVE) {
uint32_t answer;
struct in_addr in;
tor_addr_t answer;
/* Reply to resolves immediately if we can. */
if (tor_inet_aton(socks->address, &in)) { /* see if it's an IP already */
/* leave it in network order */
answer = in.s_addr;
if (tor_addr_parse(&answer, socks->address) >= 0) {/* is it an IP? */
/* remember _what_ is supposed to have been resolved. */
strlcpy(socks->address, orig_address, sizeof(socks->address));
connection_ap_handshake_socks_resolved(conn,RESOLVED_TYPE_IPV4,4,
(uint8_t*)&answer,
-1,map_expires);
connection_ap_handshake_socks_resolved_addr(conn, &answer, -1,
map_expires);
connection_mark_unattached_ap(conn,
END_STREAM_REASON_DONE |
END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
@ -2059,6 +2060,35 @@ tell_controller_about_resolved_result(entry_connection_t *conn,
}
}
/**
* As connection_ap_handshake_socks_resolved, but take a tor_addr_t to send
* as the answer.
*/
static void
connection_ap_handshake_socks_resolved_addr(entry_connection_t *conn,
const tor_addr_t *answer,
int ttl,
time_t expires)
{
if (tor_addr_family(answer) == AF_INET) {
uint32_t a = tor_addr_to_ipv4n(answer); /* network order */
connection_ap_handshake_socks_resolved(conn,RESOLVED_TYPE_IPV4,4,
(uint8_t*)&a,
ttl, expires);
} else if (tor_addr_family(answer) == AF_INET6) {
const uint8_t *a = tor_addr_to_in6_addr8(answer);
connection_ap_handshake_socks_resolved(conn,RESOLVED_TYPE_IPV6,16,
a,
ttl, expires);
} else {
log_warn(LD_BUG, "Got called with address of unexpected family %d",
tor_addr_family(answer));
connection_ap_handshake_socks_resolved(conn,
RESOLVED_TYPE_ERROR,0,NULL,-1,-1);
}
}
/** Send an answer to an AP connection that has requested a DNS lookup via
* SOCKS. The type should be one of RESOLVED_TYPE_(IPV4|IPV6|HOSTNAME) or -1
* for unreachable; the answer should be in the format specified in the socks