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gossipd: hand io_tor_connect the host as a string.

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Previously it converted the wireaddr to a string internally: to support
unresolved names we need that done externally.

We actually tell the SOCKS5 proxy to do a domain lookup already, even
though we give use IP/IPv6 address, so this change is sufficient to
support connect-by-name.

Note replacement of assert() with an explicit case statement, which
has the benefit that the compiler complains when we add new
ADDR_INTERNAL types.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-05-10 12:32:03 +09:30
parent a1dc4eef56
commit 0d23f4fb4a
3 changed files with 24 additions and 7 deletions
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23
gossipd/gossip.c
View File

@ -1925,10 +1925,27 @@ static struct io_plan *conn_init(struct io_conn *conn, struct reaching *reach)
static struct io_plan *conn_proxy_init(struct io_conn *conn,
struct reaching *reach)
{
assert(reach->addr.itype == ADDR_INTERNAL_WIREADDR);
char *host = NULL;
u16 port;
switch (reach->addr.itype) {
case ADDR_INTERNAL_WIREADDR:
host = fmt_wireaddr_without_port(tmpctx,
&reach->addr.u.wireaddr);
port = reach->addr.u.wireaddr.port;
break;
case ADDR_INTERNAL_SOCKNAME:
case ADDR_INTERNAL_ALLPROTO:
case ADDR_INTERNAL_AUTOTOR:
break;
}
if (!host)
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Can't reach to %u address", reach->addr.itype);
io_set_finish(conn, connect_failed, reach);
return io_tor_connect(conn, reach->daemon->proxyaddr,
&reach->addr.u.wireaddr, reach);
return io_tor_connect(conn, reach->daemon->proxyaddr, host, port, reach);
}
static struct addrhint *

6
gossipd/tor.c
View File

@ -151,13 +151,13 @@ static struct io_plan *io_tor_connect_do_req(struct io_conn *conn,
// called when we want to connect to TOR SOCKS5
struct io_plan *io_tor_connect(struct io_conn *conn,
const struct addrinfo *tor_proxyaddr,
const struct wireaddr *addr,
const char *host, u16 port,
struct reaching *reach)
{
struct reaching_socks *reach_tor = tal(reach, struct reaching_socks);
reach_tor->port = htons(addr->port);
reach_tor->host = fmt_wireaddr_without_port(reach_tor, addr);
reach_tor->port = htons(port);
reach_tor->host = tal_strdup(reach_tor, host);
reach_tor->reach = reach;
return io_connect(conn, tor_proxyaddr,

2
gossipd/tor.h
View File

@ -10,7 +10,7 @@ struct reaching;
struct io_plan *io_tor_connect(struct io_conn *conn,
const struct addrinfo *tor_proxyaddr,
const struct wireaddr *addr,
const char *host, u16 port,
struct reaching *reach);
#endif /* LIGHTNING_GOSSIPD_TOR_H */