276 	struct arphdr *ah = (struct arphdr*)buf;  in send_pack()  local
277 	unsigned char *p = (unsigned char *)(ah+1);  in send_pack()
279 	ah->ar_hrd = htons(ME->sll_hatype);  in send_pack()
280 	if (ah->ar_hrd == htons(ARPHRD_FDDI))  in send_pack()
281 		ah->ar_hrd = htons(ARPHRD_ETHER);  in send_pack()
282 	ah->ar_pro = htons(ETH_P_IP);  in send_pack()
283 	ah->ar_hln = ME->sll_halen;  in send_pack()
284 	ah->ar_pln = 4;  in send_pack()
285 	ah->ar_op  = advert ? htons(ARPOP_REPLY) : htons(ARPOP_REQUEST);  in send_pack()
287 	memcpy(p, &ME->sll_addr, ah->ar_hln);  in send_pack()
294 		memcpy(p, &ME->sll_addr, ah->ar_hln);  in send_pack()
296 		memcpy(p, &HE->sll_addr, ah->ar_hln);  in send_pack()
297 	p+=ah->ar_hln;  in send_pack()
303 	err = sendto(s, buf, p-buf, 0, (struct sockaddr*)HE, SLL_LEN(ah->ar_hln));  in send_pack()
379 	struct arphdr *ah = (struct arphdr*)buf;  in recv_pack()  local
380 	unsigned char *p = (unsigned char *)(ah+1);  in recv_pack()
392 	if (ah->ar_op != htons(ARPOP_REQUEST) &&  in recv_pack()
393 	    ah->ar_op != htons(ARPOP_REPLY))  in recv_pack()
397 	if (ah->ar_hrd != htons(FROM->sll_hatype) &&  in recv_pack()
398 	    (FROM->sll_hatype != ARPHRD_FDDI || ah->ar_hrd != htons(ARPHRD_ETHER)))  in recv_pack()
402 	if (ah->ar_pro != htons(ETH_P_IP))  in recv_pack()
404 	if (ah->ar_pln != 4)  in recv_pack()
406 	if (ah->ar_hln != ((struct sockaddr_ll *)&me)->sll_halen)  in recv_pack()
408 	if (len < sizeof(*ah) + 2*(4 + ah->ar_hln))  in recv_pack()
410 	memcpy(&src_ip, p+ah->ar_hln, 4);  in recv_pack()
411 	memcpy(&dst_ip, p+ah->ar_hln+4+ah->ar_hln, 4);  in recv_pack()
417 		if (memcmp(p+ah->ar_hln+4, ((struct sockaddr_ll *)&me)->sll_addr, ah->ar_hln))  in recv_pack()
443 		printf("%s from ", ah->ar_op == htons(ARPOP_REPLY) ? "reply" : "request");  in recv_pack()
445 		print_hex(p, ah->ar_hln);  in recv_pack()
451 		if (memcmp(p+ah->ar_hln+4, ((struct sockaddr_ll *)&me)->sll_addr, ah->ar_hln)) {  in recv_pack()
455 			print_hex(p+ah->ar_hln+4, ah->ar_hln);  in recv_pack()
472 	if (ah->ar_op == htons(ARPOP_REQUEST))  in recv_pack()