Osmocom Libraries » libosmocore

int osmo_iofd_write_msgb(struct osmo_io_fd *iofd, struct msgb *msg)
{
        int rc;

        if (OSMO_UNLIKELY(!iofd->io_ops.write_cb)) {
                LOGPIO(iofd, LOGL_ERROR, "write_cb not set, Rejecting msgb\n");
                return -EINVAL;
        }

Unlike the sendto variant, there's no OSMO_ASSERT for the correct mode...

int osmo_iofd_sendto_msgb(struct osmo_io_fd *iofd, struct msgb *msg, int sendto_flags, const struct osmo_sockaddr *dest)
{  
        int rc; 

        OSMO_ASSERT(iofd->mode == OSMO_IO_FD_MODE_RECVFROM_SENDTO);
        if (OSMO_UNLIKELY(!iofd->io_ops.sendto_cb)) {
                LOGPIO(iofd, LOGL_ERROR, "sendto_cb not set, Rejecting msgb\n");
                return -EINVAL;
        }