180 static int isotp_send_fc(struct sock *sk, int ae, u8 flowstatus)  in isotp_send_fc()  argument
214 		ncf->len = ae + FC_CONTENT_SZ;  in isotp_send_fc()
217 	ncf->data[ae] = N_PCI_FC | flowstatus;  in isotp_send_fc()
218 	ncf->data[ae + 1] = so->rxfc.bs;  in isotp_send_fc()
219 	ncf->data[ae + 2] = so->rxfc.stmin;  in isotp_send_fc()
221 	if (ae)  in isotp_send_fc()
326 static int isotp_rcv_fc(struct isotp_sock *so, struct canfd_frame *cf, int ae)  in isotp_rcv_fc()  argument
336 	if ((cf->len < ae + FC_CONTENT_SZ) ||  in isotp_rcv_fc()
338 	     check_pad(so, cf, ae + FC_CONTENT_SZ, so->opt.rxpad_content))) {  in isotp_rcv_fc()
351 		so->txfc.bs = cf->data[ae + 1];  in isotp_rcv_fc()
352 		so->txfc.stmin = cf->data[ae + 2];  in isotp_rcv_fc()
376 	switch (cf->data[ae] & 0x0F) {  in isotp_rcv_fc()
439 static int isotp_rcv_ff(struct sock *sk, struct canfd_frame *cf, int ae)  in isotp_rcv_ff()  argument
457 	so->rx.len = (cf->data[ae] & 0x0F) << 8;  in isotp_rcv_ff()
458 	so->rx.len += cf->data[ae + 1];  in isotp_rcv_ff()
465 		so->rx.len = cf->data[ae + 2] << 24;  in isotp_rcv_ff()
466 		so->rx.len += cf->data[ae + 3] << 16;  in isotp_rcv_ff()
467 		so->rx.len += cf->data[ae + 4] << 8;  in isotp_rcv_ff()
468 		so->rx.len += cf->data[ae + 5];  in isotp_rcv_ff()
475 	if (so->rx.len + ae + off + ff_pci_sz < so->rx.ll_dl)  in isotp_rcv_ff()
480 		isotp_send_fc(sk, ae, ISOTP_FC_OVFLW);  in isotp_rcv_ff()
486 	for (i = ae + ff_pci_sz; i < so->rx.ll_dl; i++)  in isotp_rcv_ff()
498 	isotp_send_fc(sk, ae, ISOTP_FC_CTS);  in isotp_rcv_ff()
502 static int isotp_rcv_cf(struct sock *sk, struct canfd_frame *cf, int ae,  in isotp_rcv_cf()  argument
530 		if (so->rx.len - so->rx.idx > so->rx.ll_dl - ae - N_PCI_SZ)  in isotp_rcv_cf()
534 	if ((cf->data[ae] & 0x0F) != so->rx.sn) {  in isotp_rcv_cf()
547 	for (i = ae + N_PCI_SZ; i < cf->len; i++) {  in isotp_rcv_cf()
592 	isotp_send_fc(sk, ae, ISOTP_FC_CTS);  in isotp_rcv_cf()
601 	int ae = (so->opt.flags & CAN_ISOTP_EXTEND_ADDR) ? 1 : 0;  in isotp_rcv()  local
613 	if (ae && cf->data[0] != so->opt.rx_ext_address)  in isotp_rcv()
616 	n_pci_type = cf->data[ae] & 0xF0;  in isotp_rcv()
628 		isotp_rcv_fc(so, cf, ae);  in isotp_rcv()
640 		sf_dl = cf->data[ae] & 0x0F;  in isotp_rcv()
643 			isotp_rcv_sf(sk, cf, SF_PCI_SZ4 + ae, skb, sf_dl);  in isotp_rcv()
655 					isotp_rcv_sf(sk, cf, SF_PCI_SZ8 + ae, skb,  in isotp_rcv()
656 						     cf->data[SF_PCI_SZ4 + ae]);  in isotp_rcv()
663 		isotp_rcv_ff(sk, cf, ae);  in isotp_rcv()
668 		isotp_rcv_cf(sk, cf, ae, skb);  in isotp_rcv()
674 				 int ae, int off)  in isotp_fill_dataframe()  argument
676 	int pcilen = N_PCI_SZ + ae + off;  in isotp_fill_dataframe()
700 	if (ae)  in isotp_fill_dataframe()
705 				int ae)  in isotp_create_fframe()  argument
712 	if (ae)  in isotp_create_fframe()
718 		cf->data[ae] = N_PCI_FF;  in isotp_create_fframe()
719 		cf->data[ae + 1] = 0;  in isotp_create_fframe()
720 		cf->data[ae + 2] = (u8)(so->tx.len >> 24) & 0xFFU;  in isotp_create_fframe()
721 		cf->data[ae + 3] = (u8)(so->tx.len >> 16) & 0xFFU;  in isotp_create_fframe()
722 		cf->data[ae + 4] = (u8)(so->tx.len >> 8) & 0xFFU;  in isotp_create_fframe()
723 		cf->data[ae + 5] = (u8)so->tx.len & 0xFFU;  in isotp_create_fframe()
727 		cf->data[ae] = (u8)(so->tx.len >> 8) | N_PCI_FF;  in isotp_create_fframe()
728 		cf->data[ae + 1] = (u8)so->tx.len & 0xFFU;  in isotp_create_fframe()
733 	for (i = ae + ff_pci_sz; i < so->tx.ll_dl; i++)  in isotp_create_fframe()
750 	int ae = (so->opt.flags & CAN_ISOTP_EXTEND_ADDR) ? 1 : 0;  in isotp_tx_timer_handler()  local
791 		isotp_fill_dataframe(cf, so, ae, 0);  in isotp_tx_timer_handler()
794 		cf->data[ae] = N_PCI_CF | so->tx.sn++;  in isotp_tx_timer_handler()
855 	int ae = (so->opt.flags & CAN_ISOTP_EXTEND_ADDR) ? 1 : 0;  in isotp_sendmsg()  local
887 	    (size > so->tx.ll_dl - SF_PCI_SZ4 - ae - off)) {  in isotp_sendmsg()
920 	if (size <= so->tx.ll_dl - SF_PCI_SZ4 - ae - off) {  in isotp_sendmsg()
930 		if (size <= CAN_MAX_DLEN - SF_PCI_SZ4 - ae)  in isotp_sendmsg()
933 		isotp_fill_dataframe(cf, so, ae, off);  in isotp_sendmsg()
936 		cf->data[ae] = N_PCI_SF;  in isotp_sendmsg()
940 			cf->data[SF_PCI_SZ4 + ae] = size;  in isotp_sendmsg()
942 			cf->data[ae] |= size;  in isotp_sendmsg()
952 		isotp_create_fframe(cf, so, ae);  in isotp_sendmsg()