rem: pr_retip(ip) struct ip *ip;
add: void pr_retip(struct ip *ip)
context: pr_retip(ip)	struct ip *ip;{	int hlen;	u_char *cp;	pr_iph(ip);	hlen = ip->ip_hl << 2;	cp = (u_char *)ip + hlen;	if (ip->ip_p == 6)		(void)printf("TCP: from port %u, to port %u (decimal)\n",		    (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));	else if (ip->ip_p == 17)		(void)printf("UDP: from port %u, to port %u (decimal)\n",			(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));}