M_PH_LEN          109 netinet/tcp_input.c #define M_V6_LEN(m)      (M_PH_LEN(m) - sizeof(struct ip6_hdr))
M_PH_LEN          110 netinet/tcp_input.c #define M_V4_LEN(m)      (M_PH_LEN(m) - sizeof(struct ip))