rem: pr_iph(ip) struct ip *ip;
add: void pr_iph(struct ip *ip)
context: pr_iph(ip)	struct ip *ip;{	int hlen;	u_char *cp;	hlen = ip->ip_hl << 2;	cp = (u_char *)ip + 20;		/* point to options */	(void)printf("Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst Data\n");	(void)printf(" %1x  %1x  %02x %04x %04x",	    ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id);	(void)printf("   %1x %04x", ((ip->ip_off) & 0xe000) >> 13,	    (ip->ip_off) & 0x1fff);	(void)printf("  %02x  %02x %04x", ip->ip_ttl, ip->ip_p, ip->ip_sum);	(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));	(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));	/* dump and option bytes */	while (hlen-- > 20) {		(void)printf("%02x", *cp++);	}	(void)putchar('\n');}