mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
#include <ccan/fdpass/fdpass.h>
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#include <ccan/io/fdpass/fdpass.h>
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#include <ccan/take/take.h>
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#include <common/daemon_conn.h>
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#include <wire/wire_io.h>
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#include <wire/wire_sync.h>
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struct io_plan *daemon_conn_read_next(struct io_conn *conn,
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struct daemon_conn *dc)
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{
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dc->msg_in = tal_free(dc->msg_in);
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return io_read_wire(conn, dc->ctx, &dc->msg_in, dc->daemon_conn_recv,
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dc);
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}
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static struct io_plan *daemon_conn_write_next(struct io_conn *conn,
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struct daemon_conn *dc)
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{
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const u8 *msg;
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again:
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msg = msg_dequeue(&dc->out);
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if (msg) {
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int fd = msg_extract_fd(msg);
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if (fd >= 0) {
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tal_free(msg);
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return io_send_fd(conn, fd, true,
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daemon_conn_write_next, dc);
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}
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return io_write_wire(conn, take(msg), daemon_conn_write_next,
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dc);
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} else if (dc->msg_queue_cleared_cb) {
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if (dc->msg_queue_cleared_cb(conn, dc))
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goto again;
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}
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return msg_queue_wait(conn, &dc->out, daemon_conn_write_next, dc);
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}
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bool daemon_conn_sync_flush(struct daemon_conn *dc)
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{
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const u8 *msg;
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int daemon_fd;
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/* Flush any current packet. */
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if (!io_flush_sync(dc->conn))
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return false;
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/* Make fd blocking for the duration */
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daemon_fd = io_conn_fd(dc->conn);
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if (!io_fd_block(daemon_fd, true))
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return false;
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/* Flush existing messages. */
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while ((msg = msg_dequeue(&dc->out)) != NULL) {
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int fd = msg_extract_fd(msg);
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if (fd >= 0) {
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tal_free(msg);
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if (!fdpass_send(daemon_fd, fd))
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break;
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} else if (!wire_sync_write(daemon_fd, take(msg)))
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break;
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}
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io_fd_block(daemon_fd, false);
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/* Success if and only if we flushed them all. */
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return msg == NULL;
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}
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static struct io_plan *daemon_conn_start(struct io_conn *conn,
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struct daemon_conn *dc)
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{
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return io_duplex(conn, daemon_conn_read_next(conn, dc),
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daemon_conn_write_next(conn, dc));
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}
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void daemon_conn_init(tal_t *ctx, struct daemon_conn *dc, int fd,
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struct io_plan *(*daemon_conn_recv)(struct io_conn *,
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struct daemon_conn *))
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{
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dc->daemon_conn_recv = daemon_conn_recv;
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dc->ctx = ctx;
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dc->msg_in = NULL;
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msg_queue_init(&dc->out, dc->ctx);
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dc->msg_queue_cleared_cb = NULL;
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dc->conn = io_new_conn(ctx, fd, daemon_conn_start, dc);
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}
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void daemon_conn_clear(struct daemon_conn *dc)
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{
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io_set_finish(dc->conn, NULL, NULL);
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io_close(dc->conn);
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}
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void daemon_conn_send(struct daemon_conn *dc, const u8 *msg)
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{
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msg_enqueue(&dc->out, msg);
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}
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void daemon_conn_send_fd(struct daemon_conn *dc, int fd)
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{
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msg_enqueue_fd(&dc->out, fd);
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}
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void daemon_conn_wake(struct daemon_conn *dc)
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{
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msg_wake(&dc->out);
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}
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