dccplhdr
struct dccplhdr *dlh;
hdrlen = sizeof(struct ip6_hdr) + sizeof(struct dccplhdr) +
hdrlen = sizeof(struct ip) + sizeof(struct dccplhdr) +
dlh = (struct dccplhdr *)dh;
struct dccplhdr *dlh;
dlh = (struct dccplhdr*)dh;
optlen = data_off - (sizeof(struct dccplhdr) + extrah_len);