TCP_MAX_HDR_LENGTH
mp1 = allocb(tcp->tcp_ip_hdr_len + TCP_MAX_HDR_LENGTH +
mp = allocb(tcp_ip_hdr_len + TCP_MAX_HDR_LENGTH + tcp_wroff_xtra, 0);
mp1 = allocb(tcp->tcp_ip_hdr_len + TCP_MAX_HDR_LENGTH +
TCP_MAX_HDR_LENGTH + tcp_wroff_xtra, 0)) == NULL) {
char buf[TCP_MAX_HDR_LENGTH];
IP_MAX_HDR_LENGTH + TCP_MAX_HDR_LENGTH)