Function CalcIpCheckSum

src/dolphin/src/eth/ethsec.c:48–65

}*/

static u16 CalcIpCheckSum(IPHeader *ip) {
    int len;
    u32 sum;
    u16 *p;

    sum = 0;
    len =  (ip->verlen & 0xf) << 2;
    p = (u16*)ip;

    while (len > 0) {
        sum += *p++;
        len -= 2;
    }

    sum = (sum & 0xffff) + (sum >> 16);
    sum = ((sum & 0xffff) + (sum >> 16));
    return sum ^ 0xffff;
}

static u16 CalcTcpCheckSum(IPHeader *ip, s32 len) {
    s32 hlen;