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devtools/gossipwith: allow setting features on cmdline.

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Particularly important when talking with modern lnd, which
will hang up on you if you don't offer feature bit 1!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2019-11-15 15:06:18 +10:30 • committed by Christian Decker
parent 2e9b8f42fb
commit 14a5584b50
1 changed files with 17 additions and 7 deletions
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24
devtools/gossipwith.c
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@ -7,6 +7,7 @@
#include <ccan/str/hex/hex.h>
#include <common/crypto_sync.h>
#include <common/dev_disconnect.h>
#include <common/features.h>
#include <common/peer_failed.h>
#include <common/per_peer_state.h>
#include <common/status.h>
@ -22,6 +23,7 @@ static bool stream_stdin = false;
static bool no_init = false;
static bool hex = false;
static int timeout_after = -1;
static u8 *features;
static struct io_plan *simple_write(struct io_conn *conn,
const void *data, size_t len,
@ -127,18 +129,15 @@ static struct io_plan *handshake_success(struct io_conn *conn,
{
u8 *msg;
struct per_peer_state *pps = new_per_peer_state(conn, orig_cs);
u8 *localfeatures;
struct pollfd pollfd[2];
pps->peer_fd = io_conn_fd(conn);
if (initial_sync) {
localfeatures = tal(conn, u8);
localfeatures[0] = (1 << 3);
} else
localfeatures = NULL;
if (initial_sync)
set_feature_bit(&features,
OPTIONAL_FEATURE(OPT_INITIAL_ROUTING_SYNC));
if (!no_init) {
msg = towire_init(NULL, NULL, localfeatures);
msg = towire_init(NULL, NULL, features);
sync_crypto_write(pps, take(msg));
/* Ignore their init message. */
@ -211,6 +210,14 @@ static void opt_show_secret(char buf[OPT_SHOW_LEN], const struct secret *s)
hex_encode(s->data, sizeof(s->data), buf, OPT_SHOW_LEN);
}
static char *opt_set_features(const char *arg, u8 **features)
{
*features = tal_hexdata(tal_parent(*features), arg, strlen(arg));
if (!*features)
return "features must be valid hex";
return NULL;
}
int main(int argc, char *argv[])
{
struct io_conn *conn = tal(NULL, struct io_conn);
@ -226,6 +233,7 @@ int main(int argc, char *argv[])
SECP256K1_CONTEXT_SIGN);
memset(&notsosecret, 0x42, sizeof(notsosecret));
features = tal_arr(conn, u8, 0);
opt_register_noarg("--initial-sync", opt_set_bool, &initial_sync,
"Stream complete gossip history at start");
@ -244,6 +252,8 @@ int main(int argc, char *argv[])
"Exit (success) this many seconds after no msgs rcvd");
opt_register_noarg("--hex", opt_set_bool, &hex,
"Print out messages in hex");
opt_register_arg("--features=<hex>", opt_set_features, NULL,
&features, "Send these features in init");
opt_register_noarg("--help|-h", opt_usage_and_exit,
"id@addr[:port] [hex-msg-tosend...]\n"
"Connect to a lightning peer and relay gossip messages from it",