static void
cm_msg_pack_to_buff(Sr__Msg *msg, uint8_t **msg_buf, size_t *msg_size)
{
assert_non_null(msg);
assert_non_null(msg_buf);
assert_non_null(msg_size);
*msg_size = sr__msg__get_packed_size(msg);
*msg_buf = calloc(*msg_size, sizeof(**msg_buf));
assert_non_null(*msg_buf);
sr__msg__pack(msg, *msg_buf);
sr__msg__free_unpacked(msg, NULL);
}
/**
* @brief Sends a message via provided connection.
*/
static int
cl_message_send(sr_conn_ctx_t *conn_ctx, Sr__Msg *msg)
{
size_t msg_size = 0;
int pos = 0, sent = 0;
int rc = SR_ERR_OK;
CHECK_NULL_ARG2(conn_ctx, msg);
/* find out required message size */
msg_size = sr__msg__get_packed_size(msg);
if ((msg_size <= 0) || (msg_size > SR_MAX_MSG_SIZE)) {
SR_LOG_ERR("Unable to send the message of size %zuB.", msg_size);
return SR_ERR_INTERNAL;
}
/* expand the buffer if needed */
rc = cl_conn_msg_buf_expand(conn_ctx, msg_size + SR_MSG_PREAM_SIZE);
if (SR_ERR_OK != rc) {
SR_LOG_ERR_MSG("Cannot expand buffer for the message.");
return rc;
}
/* write 4-byte length */
sr_uint32_to_buff(msg_size, conn_ctx->msg_buf);
/* pack the message */
sr__msg__pack(msg, (conn_ctx->msg_buf + SR_MSG_PREAM_SIZE));
/* send the message */
do {
sent = send(conn_ctx->fd, (conn_ctx->msg_buf + pos), (msg_size + SR_MSG_PREAM_SIZE - pos), 0);
if (sent > 0) {
pos += sent;
} else {
if (errno == EINTR) {
continue;
}
SR_LOG_ERR("Error by sending of the message: %s.", sr_strerror_safe(errno));
return SR_ERR_DISCONNECT;
}
} while ((pos < (msg_size + SR_MSG_PREAM_SIZE)) && (sent > 0));
return SR_ERR_OK;
}