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https://github.com/edk2-porting/linux-next.git
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e4f45b7f40
Call skb_checksum_init instead of private functions. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
#include <net/ip.h>
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#include <net/udp.h>
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#include <net/udplite.h>
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#include <asm/checksum.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, unsigned short proto,
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__wsum csum)
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{
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int carry;
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__u32 ulen;
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__u32 uproto;
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__u32 sum = (__force u32)csum;
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sum += (__force u32)saddr->s6_addr32[0];
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carry = (sum < (__force u32)saddr->s6_addr32[0]);
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sum += carry;
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sum += (__force u32)saddr->s6_addr32[1];
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carry = (sum < (__force u32)saddr->s6_addr32[1]);
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sum += carry;
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sum += (__force u32)saddr->s6_addr32[2];
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carry = (sum < (__force u32)saddr->s6_addr32[2]);
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sum += carry;
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sum += (__force u32)saddr->s6_addr32[3];
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carry = (sum < (__force u32)saddr->s6_addr32[3]);
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sum += carry;
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sum += (__force u32)daddr->s6_addr32[0];
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carry = (sum < (__force u32)daddr->s6_addr32[0]);
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sum += carry;
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sum += (__force u32)daddr->s6_addr32[1];
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carry = (sum < (__force u32)daddr->s6_addr32[1]);
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sum += carry;
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sum += (__force u32)daddr->s6_addr32[2];
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carry = (sum < (__force u32)daddr->s6_addr32[2]);
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sum += carry;
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sum += (__force u32)daddr->s6_addr32[3];
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carry = (sum < (__force u32)daddr->s6_addr32[3]);
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sum += carry;
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ulen = (__force u32)htonl((__u32) len);
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sum += ulen;
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carry = (sum < ulen);
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sum += carry;
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uproto = (__force u32)htonl(proto);
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sum += uproto;
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carry = (sum < uproto);
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sum += carry;
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return csum_fold((__force __wsum)sum);
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}
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EXPORT_SYMBOL(csum_ipv6_magic);
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#endif
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int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto)
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{
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int err;
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UDP_SKB_CB(skb)->partial_cov = 0;
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UDP_SKB_CB(skb)->cscov = skb->len;
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if (proto == IPPROTO_UDPLITE) {
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err = udplite_checksum_init(skb, uh);
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if (err)
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return err;
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}
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if (uh->check == 0) {
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/* RFC 2460 section 8.1 says that we SHOULD log
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this error. Well, it is reasonable.
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*/
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LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n",
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&ipv6_hdr(skb)->saddr, ntohs(uh->source),
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&ipv6_hdr(skb)->daddr, ntohs(uh->dest));
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return 1;
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}
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return skb_checksum_init(skb, IPPROTO_UDP, ip6_compute_pseudo);
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}
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EXPORT_SYMBOL(udp6_csum_init);
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