/* read a packet ID acknowledgement record from buf into ack */
bool
reliable_ack_read(struct reliable_ack *ack,
struct buffer *buf, const struct session_id *sid)
{
struct gc_arena gc = gc_new();
int i;
uint8_t count;
packet_id_type net_pid;
packet_id_type pid;
struct session_id session_id_remote;
if (!buf_read(buf, &count, sizeof(count)))
{
goto error;
}
for (i = 0; i < count; ++i)
{
if (!buf_read(buf, &net_pid, sizeof(net_pid)))
{
goto error;
}
if (ack->len >= RELIABLE_ACK_SIZE)
{
goto error;
}
pid = ntohpid(net_pid);
ack->packet_id[ack->len++] = pid;
}
if (count)
{
if (!session_id_read(&session_id_remote, buf))
{
goto error;
}
if (!session_id_defined(&session_id_remote)
|| !session_id_equal(&session_id_remote, sid))
{
dmsg(D_REL_LOW,
"ACK read BAD SESSION-ID FROM REMOTE, local=%s, remote=%s",
session_id_print(sid, &gc), session_id_print(&session_id_remote, &gc));
goto error;
}
}
gc_free(&gc);
return true;
error:
gc_free(&gc);
return false;
}
/* print a reliable ACK record coming off the wire */
const char *
reliable_ack_print (struct buffer *buf, bool verbose, struct gc_arena *gc)
{
int i;
uint8_t n_ack;
struct session_id sid_ack;
packet_id_type pid;
struct buffer out = alloc_buf_gc (256, gc);
buf_printf (&out, "[");
if (!buf_read (buf, &n_ack, sizeof (n_ack)))
goto done;
for (i = 0; i < n_ack; ++i)
{
if (!buf_read (buf, &pid, sizeof (pid)))
goto done;
pid = ntohpid (pid);
buf_printf (&out, " " packet_id_format, (packet_id_print_type)pid);
}
if (n_ack)
{
if (!session_id_read (&sid_ack, buf))
goto done;
if (verbose)
buf_printf (&out, " sid=%s", session_id_print (&sid_ack, gc));
}
done:
buf_printf (&out, " ]");
return BSTR (&out);
}