You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
2.9 KiB
105 lines
2.9 KiB
/* |
|
* INET An implementation of the TCP/IP protocol suite for the LINUX |
|
* operating system. INET is implemented using the BSD Socket |
|
* interface as the means of communication with the user level. |
|
* |
|
* Checksumming functions for IPv6 |
|
* |
|
* Authors: Jorge Cwik, <jorge@laser.satlink.net> |
|
* Arnt Gulbrandsen, <agulbra@nvg.unit.no> |
|
* Borrows very liberally from tcp.c and ip.c, see those |
|
* files for more names. |
|
* |
|
* This program is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU General Public License |
|
* as published by the Free Software Foundation; either version |
|
* 2 of the License, or (at your option) any later version. |
|
*/ |
|
|
|
/* |
|
* Fixes: |
|
* |
|
* Ralf Baechle : generic ipv6 checksum |
|
* <ralf@waldorf-gmbh.de> |
|
*/ |
|
|
|
#ifndef _CHECKSUM_IPV6_H |
|
#define _CHECKSUM_IPV6_H |
|
|
|
#include <asm/types.h> |
|
#include <asm/byteorder.h> |
|
#include <net/ip.h> |
|
#include <asm/checksum.h> |
|
#include <linux/in6.h> |
|
#include <linux/tcp.h> |
|
#include <linux/ipv6.h> |
|
|
|
#ifndef _HAVE_ARCH_IPV6_CSUM |
|
__sum16 csum_ipv6_magic(const struct in6_addr *saddr, |
|
const struct in6_addr *daddr, |
|
__u32 len, __u8 proto, __wsum csum); |
|
#endif |
|
|
|
static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto) |
|
{ |
|
return ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
|
&ipv6_hdr(skb)->daddr, |
|
skb->len, proto, 0)); |
|
} |
|
|
|
static inline __wsum ip6_gro_compute_pseudo(struct sk_buff *skb, int proto) |
|
{ |
|
const struct ipv6hdr *iph = skb_gro_network_header(skb); |
|
|
|
return ~csum_unfold(csum_ipv6_magic(&iph->saddr, &iph->daddr, |
|
skb_gro_len(skb), proto, 0)); |
|
} |
|
|
|
static __inline__ __sum16 tcp_v6_check(int len, |
|
const struct in6_addr *saddr, |
|
const struct in6_addr *daddr, |
|
__wsum base) |
|
{ |
|
return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base); |
|
} |
|
|
|
static inline void __tcp_v6_send_check(struct sk_buff *skb, |
|
const struct in6_addr *saddr, |
|
const struct in6_addr *daddr) |
|
{ |
|
struct tcphdr *th = tcp_hdr(skb); |
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) { |
|
th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0); |
|
skb->csum_start = skb_transport_header(skb) - skb->head; |
|
skb->csum_offset = offsetof(struct tcphdr, check); |
|
} else { |
|
th->check = tcp_v6_check(skb->len, saddr, daddr, |
|
csum_partial(th, th->doff << 2, |
|
skb->csum)); |
|
} |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static inline void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb) |
|
{ |
|
struct ipv6_pinfo *np = inet6_sk(sk); |
|
|
|
__tcp_v6_send_check(skb, &np->saddr, &sk->sk_v6_daddr); |
|
} |
|
#endif |
|
|
|
static inline __sum16 udp_v6_check(int len, |
|
const struct in6_addr *saddr, |
|
const struct in6_addr *daddr, |
|
__wsum base) |
|
{ |
|
return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base); |
|
} |
|
|
|
void udp6_set_csum(bool nocheck, struct sk_buff *skb, |
|
const struct in6_addr *saddr, |
|
const struct in6_addr *daddr, int len); |
|
|
|
int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto); |
|
#endif
|
|
|