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hw_nat: fix IPv6 SIT checksum calculation

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andy.padavan
2017-04-23 01:22:30 +07:00
parent ee8a0a0f12
commit fa49cb3e9e
1 changed files with 11 additions and 7 deletions
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18
trunk/proprietary/rt_ppe/hw_nat/ra_nat.c
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@@ -1014,15 +1014,19 @@ static uint16_t PpeGetChkBase(struct iphdr *iph)
{
uint16_t org_chksum = ntohs(iph->check);
uint16_t org_tot_len = ntohs(iph->tot_len);
uint32_t tmp = 0;
uint16_t chksum_base = 0;
uint16_t org_id = ntohs(iph->id);
uint16_t chksum_tmp, tot_len_tmp, id_tmp;
uint32_t tmp;
tmp = ~(org_chksum) + ~(org_tot_len);
tmp = ((tmp >> 16) && 0x7) + (tmp & 0xFFFF);
tmp = ((tmp >> 16) && 0x7) + (tmp & 0xFFFF);
chksum_base = tmp & 0xFFFF;
chksum_tmp = ~(org_chksum);
tot_len_tmp = ~(org_tot_len);
id_tmp = ~(org_id);
return chksum_base;
tmp = chksum_tmp + tot_len_tmp + id_tmp;
tmp = ((tmp >> 16) & 0x7) + (tmp & 0xFFFF);
tmp = ((tmp >> 16) & 0x7) + (tmp & 0xFFFF);
return (uint16_t)(tmp & 0xFFFF);
}
#endif