ovpn_wire_header
tunnel_len = m->m_pkthdr.len - sizeof(struct ovpn_wire_header);
const struct ovpn_wire_header *ohdr)
struct ovpn_wire_header *ohdr;
sizeof(struct ovpn_wire_header));
struct ovpn_wire_header *ohdr;
ovpn_hdr_len = sizeof(struct ovpn_wire_header);
ohdr = mtod(m, struct ovpn_wire_header *);
crp->crp_digest_start = offsetof(struct ovpn_wire_header, auth_tag);
sizeof(struct udphdr) - sizeof(struct ovpn_wire_header))
struct ovpn_wire_header ohdr;
struct ovpn_wire_header tmphdr;
struct ovpn_wire_header *ohdr;
offsetof(struct ovpn_wire_header, auth_tag);