/**
* Build a pong message.
*
* @return a /PO message.
*/
pmsg_t *
g2_build_pong(void)
{
ONCE_FLAG_RUN(build_po_done, g2_build_pong_once);
return pmsg_clone(build_po);
}
/**
* Build an alive ping message.
*
* @return a /PI message.
*/
pmsg_t *
g2_build_alive_ping(void)
{
ONCE_FLAG_RUN(build_alive_pi_done, g2_build_alive_ping_once);
return pmsg_clone(build_alive_pi);
}
/**
* Dechunk more data from the input buffer `mb'.
* @returns dechunked data in a new buffer, or NULL if no more data.
*/
static pmsg_t *
dechunk_data(rxdrv_t *rx, pmsg_t *mb)
{
struct attr *attr = rx->opaque;
const char *error_str, *src;
size_t size;
/*
* Prepare call to parse_chunk().
*/
size = pmsg_size(mb);
src = pmsg_read_base(mb);
while (size > 0) {
size_t ret;
g_assert(CHUNK_STATE_ERROR != attr->state);
/*
* Copy avoidance: if the data we got fits into the current chunk size,
* then we don't have to parse anything: all the data belong to the
* current chunk, so we can simply pass them to the upper layer.
*/
if (CHUNK_STATE_DATA == attr->state) {
pmsg_t *nmb;
nmb = pmsg_clone(mb);
if (size < attr->data_remain) {
/* The complete chunk data is forwarded to the upper layer */
mb->m_rptr += size;
attr->data_remain -= size;
} else {
/* Only the first ``data_remain'' bytes are forwarded */
mb->m_rptr += attr->data_remain;
nmb->m_wptr =
deconstify_pointer(&nmb->m_rptr[attr->data_remain]);
attr->data_remain = 0;
attr->state = CHUNK_STATE_DATA_CRLF;
}
if (GNET_PROPERTY(rx_debug) > 9)
g_debug("dechunk_data: returning chunk of %u bytes",
pmsg_size(nmb));
return nmb;
}
g_assert(size > 0);
g_assert(CHUNK_STATE_DATA != attr->state);
/*
* Parse chunk headers
*/
ret = parse_chunk(rx, src, size, &error_str);
if (0 == ret) {
/*
* We can't continue if we meet a dechunking error. Signal
* our user so that the connection is terminated.
*/
errno = EIO;
attr->cb->chunk_error(rx->owner,
"dechunk() failed: %s", error_str);
g_warning("dechunk_data(): %s", error_str);
break;
}
g_assert(ret <= size);
size -= ret;
mb->m_rptr += ret; /* Read that far */
}
return NULL; /* No more data */
}
