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channel: receive gossip fd on exec.

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This simplifies things a little: hand the fd on exec rather than over the
request socket.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2017-03-20 07:02:44 +10:30
parent f511012e29
commit c213ea482d
2 changed files with 7 additions and 13 deletions
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17
lightningd/channel/channel.c
View File

@ -32,9 +32,10 @@
#include <wire/wire_io.h>
#include <wire/wire_sync.h>
/* stdin == requests, 3 == peer */
/* stdin == requests, 3 == peer, 4 = gossip */
#define REQ_FD STDIN_FILENO
#define PEER_FD 3
#define GOSSIP_FD 4
struct peer {
struct peer_crypto_state pcs;
@ -59,7 +60,6 @@ struct peer {
struct msg_queue peer_out;
int gossip_client_fd;
struct daemon_conn gossip_client;
/* Announcement related information */
@ -271,6 +271,10 @@ int main(int argc, char *argv[])
| SECP256K1_CONTEXT_SIGN);
status_setup(REQ_FD);
msg_queue_init(&peer->peer_out, peer);
daemon_conn_init(peer, &peer->gossip_client, GOSSIP_FD,
gossip_client_recv);
init_peer_crypto_state(peer, &peer->pcs);
peer->funding_locked[LOCAL] = peer->funding_locked[REMOTE] = false;
@ -296,15 +300,6 @@ int main(int argc, char *argv[])
status_failed(WIRE_CHANNEL_BAD_COMMAND, "%s",
tal_hex(msg, msg));
tal_free(msg);
peer->gossip_client_fd = fdpass_recv(REQ_FD);
daemon_conn_init(peer, &peer->gossip_client, peer->gossip_client_fd,
gossip_client_recv);
if (peer->gossip_client_fd == -1)
status_failed(
WIRE_CHANNEL_BAD_COMMAND,
"Did not receive a valid client socket to gossipd");
/* We derive everything from the one secret seed. */
derive_basepoints(&seed, &peer->funding_pubkey[LOCAL], &points[LOCAL],

3
lightningd/peer_control.c
View File

@ -648,7 +648,7 @@ static void peer_start_channeld(struct peer *peer, bool am_funder,
"lightningd_channel", peer,
channel_wire_type_name,
update_channel_status, NULL,
peer->fd, -1);
peer->fd, peer->gossip_client_fd, -1);
if (!peer->owner) {
log_unusual(peer->log, "Could not subdaemon channel: %s",
strerror(errno));
@ -682,7 +682,6 @@ static void peer_start_channeld(struct peer *peer, bool am_funder,
/* We don't expect a response: we are triggered by funding_depth_cb. */
subd_send_msg(peer->owner, take(msg));
subd_send_fd(peer->owner, peer->gossip_client_fd);
}
static bool opening_release_tx(struct subd *opening, const u8 *resp,