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https://github.com/Qortal/Brooklyn.git
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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Checksumming functions for IPv6
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*
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* Authors: Jorge Cwik, <jorge@laser.satlink.net>
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* Arnt Gulbrandsen, <agulbra@nvg.unit.no>
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* Borrows very liberally from tcp.c and ip.c, see those
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* files for more names.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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/*
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* Fixes:
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*
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* Ralf Baechle : generic ipv6 checksum
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* <ralf@waldorf-gmbh.de>
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*/
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#ifndef _CHECKSUM_IPV6_H
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#define _CHECKSUM_IPV6_H
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#include <net/ip.h>
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#include <asm/checksum.h>
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#include <linux/in6.h>
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#include <linux/tcp.h>
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#include <linux/ipv6.h>
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#ifndef _HAVE_ARCH_IPV6_CSUM
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__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__u32 len, __u8 proto, __wsum csum);
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#endif
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static inline __wsum ip6_compute_pseudo(struct sk_buff *skb, int proto)
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{
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return ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
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&ipv6_hdr(skb)->daddr,
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skb->len, proto, 0));
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}
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static inline __wsum ip6_gro_compute_pseudo(struct sk_buff *skb, int proto)
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{
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const struct ipv6hdr *iph = skb_gro_network_header(skb);
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return ~csum_unfold(csum_ipv6_magic(&iph->saddr, &iph->daddr,
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skb_gro_len(skb), proto, 0));
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}
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static __inline__ __sum16 tcp_v6_check(int len,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__wsum base)
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{
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return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
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}
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static inline void __tcp_v6_send_check(struct sk_buff *skb,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr)
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{
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struct tcphdr *th = tcp_hdr(skb);
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if (skb->ip_summed == CHECKSUM_PARTIAL) {
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th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0);
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skb->csum_start = skb_transport_header(skb) - skb->head;
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skb->csum_offset = offsetof(struct tcphdr, check);
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} else {
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th->check = tcp_v6_check(skb->len, saddr, daddr,
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csum_partial(th, th->doff << 2,
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skb->csum));
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}
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static inline void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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__tcp_v6_send_check(skb, &np->saddr, &sk->sk_v6_daddr);
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}
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#endif
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static inline __sum16 udp_v6_check(int len,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__wsum base)
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{
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return csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, base);
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}
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void udp6_set_csum(bool nocheck, struct sk_buff *skb,
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const struct in6_addr *saddr,
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const struct in6_addr *daddr, int len);
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int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto);
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#endif
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