bsd/netinet/dhcp_options.c

438 dhcpoa_init_common(dhcpoa_t * oa_p, void * buffer, int size, int reserve)
440     bzero(oa_p, sizeof(*oa_p));
441     oa_p->oa_buffer = buffer;
442     oa_p->oa_size = size;
443     oa_p->oa_reserve = reserve;
447 dhcpoa_init_no_end(dhcpoa_t * oa_p, void * buffer, int size)
449     dhcpoa_init_common(oa_p, buffer, size, 0);
454 dhcpoa_size(dhcpoa_t * oa_p)
456     return (oa_p->oa_size);
460 dhcpoa_init(dhcpoa_t * oa_p, void * buffer, int size)
463     dhcpoa_init_common(oa_p, buffer, size, 1);
473 dhcpoa_add(dhcpoa_t * oa_p, dhcptag_t tag, int len, const void * option)
480     if (oa_p->oa_end_tag) {
487 	if ((oa_p->oa_offset + 1) > oa_p->oa_size) {
490 		     oa_p->oa_offset + oa_p->oa_reserve, oa_p->oa_size));
493 	((uint8_t *)oa_p->oa_buffer)[oa_p->oa_offset + DHCP_TAG_OFFSET] = tag;
494 	oa_p->oa_offset++;
495 	oa_p->oa_end_tag = 1;
500 	if ((oa_p->oa_offset + oa_p->oa_reserve + 1) > oa_p->oa_size) {
502 		     oa_p->oa_offset + oa_p->oa_reserve + 1, oa_p->oa_size));
505 	((uint8_t *)oa_p->oa_buffer)[oa_p->oa_offset + DHCP_TAG_OFFSET] = tag;
506 	oa_p->oa_offset++;
511 	if ((oa_p->oa_offset + len + 2 + oa_p->oa_reserve) > oa_p->oa_size) {
513 		     oa_p->oa_offset + len + 2 + oa_p->oa_reserve,
514 		     oa_p->oa_size));
517 	((uint8_t *)oa_p->oa_buffer)[oa_p->oa_offset + DHCP_TAG_OFFSET] = tag;
518 	((uint8_t *)oa_p->oa_buffer)[oa_p->oa_offset + DHCP_LEN_OFFSET] = (uint8_t)len;
520 	    memcpy(oa_p->oa_buffer + (DHCP_OPTION_OFFSET + oa_p->oa_offset),
523 	oa_p->oa_offset += len + DHCP_OPTION_OFFSET;
526     oa_p->oa_option_count++;
537 dhcpoa_add_dhcpmsg(dhcpoa_t * oa_p, dhcp_msgtype_t msgtype)
539     return (dhcpoa_add(oa_p, dhcptag_dhcp_message_type_e,
544 dhcpoa_used(dhcpoa_t * oa_p)
546     return (oa_p->oa_offset);
550 dhcpoa_freespace(dhcpoa_t * oa_p)
554     freespace = oa_p->oa_size - oa_p->oa_offset - oa_p->oa_reserve;
562 dhcpoa_count(dhcpoa_t * oa_p)
564     return (oa_p->oa_option_count);
568 dhcpoa_buffer(dhcpoa_t * oa_p)
570     return (oa_p->oa_buffer);