63 dhcp_option ( struct dhcp_options *options, unsigned int offset ) {  in dhcp_option()  argument
64 	return ( ( struct dhcp_option * ) ( options->data + offset ) );  in dhcp_option()
75 dhcp_option_offset ( struct dhcp_options *options,  in dhcp_option_offset()  argument
77 	return ( ( ( void * ) option ) - options->data );  in dhcp_option_offset()
114 static int find_dhcp_option_with_encap ( struct dhcp_options *options,  in find_dhcp_option_with_encap()  argument
120 	ssize_t remaining = options->len;  in find_dhcp_option_with_encap()
133 		option = dhcp_option ( options, offset );  in find_dhcp_option_with_encap()
150 			DBGC ( options, "DHCPOPT %p found %s (length %d)\n",  in find_dhcp_option_with_encap()
151 			       options, dhcp_tag_name ( original_tag ),  in find_dhcp_option_with_encap()
183 static int resize_dhcp_option ( struct dhcp_options *options,  in resize_dhcp_option()  argument
199 		DBGC ( options, "DHCPOPT %p overlength option\n", options );  in resize_dhcp_option()
202 	new_options_len = ( options->len + delta );  in resize_dhcp_option()
203 	if ( new_options_len > options->max_len ) {  in resize_dhcp_option()
206 			new_data = realloc ( options->data, new_options_len );  in resize_dhcp_option()
208 				DBGC ( options, "DHCPOPT %p could not "  in resize_dhcp_option()
209 				       "reallocate to %zd bytes\n", options,  in resize_dhcp_option()
213 			options->data = new_data;  in resize_dhcp_option()
214 			options->max_len = new_options_len;  in resize_dhcp_option()
216 			DBGC ( options, "DHCPOPT %p out of space\n", options );  in resize_dhcp_option()
221 		encapsulator = dhcp_option ( options, encap_offset );  in resize_dhcp_option()
224 			DBGC ( options, "DHCPOPT %p overlength encapsulator\n",  in resize_dhcp_option()
225 			       options );  in resize_dhcp_option()
230 	options->len = new_options_len;  in resize_dhcp_option()
233 	option = dhcp_option ( options, offset );  in resize_dhcp_option()
236 	end = ( options->data + options->max_len );  in resize_dhcp_option()
260 static int set_dhcp_option ( struct dhcp_options *options, unsigned int tag,  in set_dhcp_option()  argument
277 	creation_offset = find_dhcp_option_with_encap ( options, DHCP_END,  in set_dhcp_option()
280 		creation_offset = options->len;  in set_dhcp_option()
282 	offset = find_dhcp_option_with_encap ( options, tag, &encap_offset );  in set_dhcp_option()
284 		old_len = dhcp_option_len ( dhcp_option ( options, offset ) );  in set_dhcp_option()
285 		DBGC ( options, "DHCPOPT %p resizing %s from %zd to %zd\n",  in set_dhcp_option()
286 		       options, dhcp_tag_name ( tag ), old_len, new_len );  in set_dhcp_option()
288 		DBGC ( options, "DHCPOPT %p creating %s (length %zd)\n",  in set_dhcp_option()
289 		       options, dhcp_tag_name ( tag ), new_len );  in set_dhcp_option()
295 			encap_offset = set_dhcp_option ( options, encap_tag,  in set_dhcp_option()
308 	if ( ( rc = resize_dhcp_option ( options, offset, encap_offset,  in set_dhcp_option()
315 		option = dhcp_option ( options, offset );  in set_dhcp_option()
323 		option = dhcp_option ( options, encap_offset );  in set_dhcp_option()
325 			set_dhcp_option ( options, encap_tag, NULL, 0, 0 );  in set_dhcp_option()
340 int dhcpopt_store ( struct dhcp_options *options, unsigned int tag,  in dhcpopt_store()  argument
344 	offset = set_dhcp_option ( options, tag, data, len, 0 );  in dhcpopt_store()
359 int dhcpopt_extensible_store ( struct dhcp_options *options, unsigned int tag,  in dhcpopt_extensible_store()  argument
363 	offset = set_dhcp_option ( options, tag, data, len, 1 );  in dhcpopt_extensible_store()
378 int dhcpopt_fetch ( struct dhcp_options *options, unsigned int tag,  in dhcpopt_fetch()  argument
384 	offset = find_dhcp_option_with_encap ( options, tag, NULL );  in dhcpopt_fetch()
388 	option = dhcp_option ( options, offset );  in dhcpopt_fetch()
405 static void dhcpopt_update_len ( struct dhcp_options *options ) {  in dhcpopt_update_len()  argument
408 	ssize_t remaining = options->max_len;  in dhcpopt_update_len()
412 	options->len = 0;  in dhcpopt_update_len()
414 		option = dhcp_option ( options, offset );  in dhcpopt_update_len()
421 			options->len = offset;  in dhcpopt_update_len()
435 void dhcpopt_init ( struct dhcp_options *options, void *data,  in dhcpopt_init()  argument
439 	options->data = data;  in dhcpopt_init()
440 	options->max_len = max_len;  in dhcpopt_init()
443 	dhcpopt_update_len ( options );  in dhcpopt_init()
445 	DBGC ( options, "DHCPOPT %p created (data %p len %#zx max_len %#zx)\n",  in dhcpopt_init()
446 	       options, options->data, options->len, options->max_len );  in dhcpopt_init()