Lines Matching +full:no +full:- +full:hw +full:- +full:checksum

1 /* SPDX-License-Identifier: GPL-2.0 */
3  *	Definitions for the UDP-Lite (RFC 3828) code.
11 /* UDP-Lite socket options */
19  *	Checksum computation is all in software, hence simpler getfrag.
25 	return copy_from_iter_full(to, len, &msg->msg_iter) ? 0 : -EFAULT;  in udplite_getfrag()
35         /* In UDPv4 a zero checksum means that the transmitter generated no  in udplite_checksum_init()
36          * checksum. UDP-Lite (like IPv6) mandates checksums, hence packets  in udplite_checksum_init()
37          * with a zero checksum field are illegal.                            */  in udplite_checksum_init()
38 	if (uh->check == 0) {  in udplite_checksum_init()
39 		net_dbg_ratelimited("UDPLite: zeroed checksum field\n");  in udplite_checksum_init()
43 	cscov = ntohs(uh->len);  in udplite_checksum_init()
47 	else if (cscov < 8  || cscov > skb->len) {  in udplite_checksum_init()
52 				    cscov, skb->len);  in udplite_checksum_init()
55 	} else if (cscov < skb->len) {  in udplite_checksum_init()
56         	UDP_SKB_CB(skb)->partial_cov = 1;  in udplite_checksum_init()
57 		UDP_SKB_CB(skb)->cscov = cscov;  in udplite_checksum_init()
58 		if (skb->ip_summed == CHECKSUM_COMPLETE)  in udplite_checksum_init()
59 			skb->ip_summed = CHECKSUM_NONE;  in udplite_checksum_init()
60 		skb->csum_valid = 0;  in udplite_checksum_init()
66 /* Fast-path computation of checksum. Socket may not be locked. */
70 	const struct sock *sk = skb->sk;  in udplite_csum()
71 	int len = skb->len - off;  in udplite_csum()
74 		u16 pcslen = READ_ONCE(udp_sk(sk)->pcslen);  in udplite_csum()
79 			udp_hdr(skb)->len = htons(pcslen);  in udplite_csum()
82 	skb->ip_summed = CHECKSUM_NONE;     /* no HW support for checksumming */  in udplite_csum()