Release 4.11 net/ipv6/ip6_checksum.c
#include <net/ip.h>
#include <net/udp.h>
#include <net/udplite.h>
#include <asm/checksum.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)
{
int carry;
__u32 ulen;
__u32 uproto;
__u32 sum = (__force u32)csum;
sum += (__force u32)saddr->s6_addr32[0];
carry = (sum < (__force u32)saddr->s6_addr32[0]);
sum += carry;
sum += (__force u32)saddr->s6_addr32[1];
carry = (sum < (__force u32)saddr->s6_addr32[1]);
sum += carry;
sum += (__force u32)saddr->s6_addr32[2];
carry = (sum < (__force u32)saddr->s6_addr32[2]);
sum += carry;
sum += (__force u32)saddr->s6_addr32[3];
carry = (sum < (__force u32)saddr->s6_addr32[3]);
sum += carry;
sum += (__force u32)daddr->s6_addr32[0];
carry = (sum < (__force u32)daddr->s6_addr32[0]);
sum += carry;
sum += (__force u32)daddr->s6_addr32[1];
carry = (sum < (__force u32)daddr->s6_addr32[1]);
sum += carry;
sum += (__force u32)daddr->s6_addr32[2];
carry = (sum < (__force u32)daddr->s6_addr32[2]);
sum += carry;
sum += (__force u32)daddr->s6_addr32[3];
carry = (sum < (__force u32)daddr->s6_addr32[3]);
sum += carry;
ulen = (__force u32)htonl((__u32) len);
sum += ulen;
carry = (sum < ulen);
sum += carry;
uproto = (__force u32)htonl(proto);
sum += uproto;
carry = (sum < uproto);
sum += carry;
return csum_fold((__force __wsum)sum);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 382 | 99.74% | 1 | 50.00% |
Alexander Duyck | 1 | 0.26% | 1 | 50.00% |
Total | 383 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(csum_ipv6_magic);
#endif
int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, int proto)
{
int err;
UDP_SKB_CB(skb)->partial_cov = 0;
UDP_SKB_CB(skb)->cscov = skb->len;
if (proto == IPPROTO_UDPLITE) {
err = udplite_checksum_init(skb, uh);
if (err)
return err;
}
/* To support RFC 6936 (allow zero checksum in UDP/IPV6 for tunnels)
* we accept a checksum of zero here. When we find the socket
* for the UDP packet we'll check if that socket allows zero checksum
* for IPv6 (set by socket option).
*
* Note, we are only interested in != 0 or == 0, thus the
* force to int.
*/
return (__force int)skb_checksum_init_zero_check(skb, proto, uh->check,
ip6_compute_pseudo);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 68 | 80.95% | 1 | 20.00% |
Björn Mork | 6 | 7.14% | 1 | 20.00% |
Hannes Frederic Sowa | 5 | 5.95% | 1 | 20.00% |
Tom Herbert | 5 | 5.95% | 2 | 40.00% |
Total | 84 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(udp6_csum_init);
/* Function to set UDP checksum for an IPv6 UDP packet. This is intended
* for the simple case like when setting the checksum for a UDP tunnel.
*/
void udp6_set_csum(bool nocheck, struct sk_buff *skb,
const struct in6_addr *saddr,
const struct in6_addr *daddr, int len)
{
struct udphdr *uh = udp_hdr(skb);
if (nocheck)
uh->check = 0;
else if (skb_is_gso(skb))
uh->check = ~udp_v6_check(len, saddr, daddr, 0);
else if (skb->ip_summed == CHECKSUM_PARTIAL) {
uh->check = 0;
uh->check = udp_v6_check(len, saddr, daddr, lco_csum(skb));
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
} else {
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum_start = skb_transport_header(skb) - skb->head;
skb->csum_offset = offsetof(struct udphdr, check);
uh->check = ~udp_v6_check(len, saddr, daddr, 0);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Tom Herbert | 124 | 72.51% | 1 | 33.33% |
Edward Cree | 47 | 27.49% | 2 | 66.67% |
Total | 171 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(udp6_set_csum);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 477 | 71.09% | 1 | 11.11% |
Tom Herbert | 135 | 20.12% | 3 | 33.33% |
Edward Cree | 47 | 7.00% | 2 | 22.22% |
Björn Mork | 6 | 0.89% | 1 | 11.11% |
Hannes Frederic Sowa | 5 | 0.75% | 1 | 11.11% |
Alexander Duyck | 1 | 0.15% | 1 | 11.11% |
Total | 671 | 100.00% | 9 | 100.00% |
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