443 	m->m_len = opts->ip_nhops * sizeof(struct in_addr) +  in ip_srcroute()
487 	m->m_len -= olen;  in ip_stripoptions()
494 	    (size_t )(m->m_len - sizeof(struct ip)));  in ip_stripoptions()
512 	optlen = opt->m_len - sizeof(p->ipopt_dst);  in ip_insertoptions()
530 		m->m_len -= sizeof(struct ip);  in ip_insertoptions()
534 		m->m_len = optlen + sizeof(struct ip);  in ip_insertoptions()
539 		m->m_len += optlen;  in ip_insertoptions()
616 	if (m == NULL || m->m_len == 0) {  in ip_pcbopts()
625 	if (m->m_len % sizeof(int32_t))  in ip_pcbopts()
631 	if (m->m_data + m->m_len + sizeof(struct in_addr) >= &m->m_dat[MLEN])  in ip_pcbopts()
633 	cnt = m->m_len;  in ip_pcbopts()
634 	m->m_len += sizeof(struct in_addr);  in ip_pcbopts()
672 			m->m_len -= sizeof(struct in_addr);  in ip_pcbopts()
691 	if (m->m_len > MAX_IPOPTLEN + sizeof(struct in_addr))  in ip_pcbopts()