315 	struct T_opthdr *opthdr;  in set_src_addr()  local
333 	opthdr = (struct T_opthdr *)memalign(sizeof (int),  in set_src_addr()
335 	if (opthdr == NULL)  in set_src_addr()
337 	opthdr->len = sizeof (struct T_opthdr) + sizeof (in_pktinfo_t);  in set_src_addr()
338 	opthdr->level = IPPROTO_IP;  in set_src_addr()
339 	opthdr->name = IP_PKTINFO;  in set_src_addr()
345 	pktinfo = (in_pktinfo_t *)(opthdr + 1);  in set_src_addr()
351 	if (opthdr->len + opt->len <= opt->maxlen) {  in set_src_addr()
352 		(void) memcpy((void *)(opt->buf+opt->len), (const void *)opthdr,  in set_src_addr()
353 		    opthdr->len);  in set_src_addr()
354 		opt->len += opthdr->len;  in set_src_addr()
356 	free(opthdr);  in set_src_addr()