^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * INET An implementation of the TCP/IP protocol suite for the LINUX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * operating system. INET is implemented using the BSD Socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * interface as the means of communication with the user level.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Checksumming functions for IPv6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Authors: Jorge Cwik, <jorge@laser.satlink.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Arnt Gulbrandsen, <agulbra@nvg.unit.no>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Borrows very liberally from tcp.c and ip.c, see those
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * files for more names.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Fixes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Ralf Baechle : generic ipv6 checksum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * <ralf@waldorf-gmbh.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #ifndef _CHECKSUM_IPV6_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define _CHECKSUM_IPV6_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/in6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #ifndef _HAVE_ARCH_IPV6_CSUM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) const struct in6_addr *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) __u32 len, __u8 proto, __wsum csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) &ipv6_hdr(skb)->daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) skb->len, proto, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static inline __wsum ip6_gro_compute_pseudo(struct sk_buff *skb, int proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) const struct ipv6hdr *iph = skb_gro_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return ~csum_unfold(csum_ipv6_magic(&iph->saddr, &iph->daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) skb_gro_len(skb), proto, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static __inline__ __sum16 tcp_v6_check(int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) const struct in6_addr *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) __wsum base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static inline void __tcp_v6_send_check(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) const struct in6_addr *daddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct tcphdr *th = tcp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (skb->ip_summed == CHECKSUM_PARTIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) skb->csum_start = skb_transport_header(skb) - skb->head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) skb->csum_offset = offsetof(struct tcphdr, check);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) th->check = tcp_v6_check(skb->len, saddr, daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) csum_partial(th, th->doff << 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) skb->csum));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static inline void tcp_v6_gso_csum_prep(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct ipv6hdr *ipv6h = ipv6_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct tcphdr *th = tcp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) ipv6h->payload_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) th->check = ~tcp_v6_check(0, &ipv6h->saddr, &ipv6h->daddr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline __sum16 udp_v6_check(int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) const struct in6_addr *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) __wsum base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) void udp6_set_csum(bool nocheck, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) const struct in6_addr *daddr, int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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