diff options
Diffstat (limited to 'include/net/udplite.h')
| -rw-r--r-- | include/net/udplite.h | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/include/net/udplite.h b/include/net/udplite.h deleted file mode 100644 index 786919d29f8d..000000000000 --- a/include/net/udplite.h +++ /dev/null @@ -1,88 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Definitions for the UDP-Lite (RFC 3828) code. - */ -#ifndef _UDPLITE_H -#define _UDPLITE_H - -#include <net/ip6_checksum.h> -#include <net/udp.h> - -/* UDP-Lite socket options */ -#define UDPLITE_SEND_CSCOV 10 /* sender partial coverage (as sent) */ -#define UDPLITE_RECV_CSCOV 11 /* receiver partial coverage (threshold ) */ - -extern struct proto udplite_prot; -extern struct udp_table udplite_table; - -/* - * Checksum computation is all in software, hence simpler getfrag. - */ -static __inline__ int udplite_getfrag(void *from, char *to, int offset, - int len, int odd, struct sk_buff *skb) -{ - struct msghdr *msg = from; - return copy_from_iter_full(to, len, &msg->msg_iter) ? 0 : -EFAULT; -} - -/* - * Checksumming routines - */ -static inline int udplite_checksum_init(struct sk_buff *skb, struct udphdr *uh) -{ - u16 cscov; - - /* In UDPv4 a zero checksum means that the transmitter generated no - * checksum. UDP-Lite (like IPv6) mandates checksums, hence packets - * with a zero checksum field are illegal. */ - if (uh->check == 0) { - net_dbg_ratelimited("UDPLite: zeroed checksum field\n"); - return 1; - } - - cscov = ntohs(uh->len); - - if (cscov == 0) /* Indicates that full coverage is required. */ - ; - else if (cscov < 8 || cscov > skb->len) { - /* - * Coverage length violates RFC 3828: log and discard silently. - */ - net_dbg_ratelimited("UDPLite: bad csum coverage %d/%d\n", - cscov, skb->len); - return 1; - - } else if (cscov < skb->len) { - UDP_SKB_CB(skb)->partial_cov = 1; - UDP_SKB_CB(skb)->cscov = cscov; - if (skb->ip_summed == CHECKSUM_COMPLETE) - skb->ip_summed = CHECKSUM_NONE; - skb->csum_valid = 0; - } - - return 0; -} - -/* Fast-path computation of checksum. Socket may not be locked. */ -static inline __wsum udplite_csum(struct sk_buff *skb) -{ - const int off = skb_transport_offset(skb); - const struct sock *sk = skb->sk; - int len = skb->len - off; - - if (udp_test_bit(UDPLITE_SEND_CC, sk)) { - u16 pcslen = READ_ONCE(udp_sk(sk)->pcslen); - - if (pcslen < len) { - if (pcslen > 0) - len = pcslen; - udp_hdr(skb)->len = htons(pcslen); - } - } - skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */ - - return skb_checksum(skb, off, len, 0); -} - -void udplite4_register(void); -#endif /* _UDPLITE_H */ |
