pipex_l2tp_header
struct pipex_l2tp_header *l2tp = NULL;
hlen = sizeof(struct pipex_l2tp_header) +
plen = datalen + sizeof(struct pipex_l2tp_header) +
l2tp = (struct pipex_l2tp_header *)
struct pipex_l2tp_header l2tp;
struct pipex_l2tp_header *l2tp;
PIPEX_PULLUP(m0, sizeof(struct pipex_l2tp_header) +
l2tp = mtod(m0, struct pipex_l2tp_header *);