diff options
Diffstat (limited to 'src/libimcv/ietf/ietf_attr_attr_request.c')
| -rw-r--r-- | src/libimcv/ietf/ietf_attr_attr_request.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/src/libimcv/ietf/ietf_attr_attr_request.c b/src/libimcv/ietf/ietf_attr_attr_request.c new file mode 100644 index 000000000..c0dcd0983 --- /dev/null +++ b/src/libimcv/ietf/ietf_attr_attr_request.c @@ -0,0 +1,270 @@ +/* + * Copyright (C) 2012 Andreas Steffen + * HSR Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include "imcv.h" +#include "ietf_attr_attr_request.h" + +#include <pa_tnc/pa_tnc_msg.h> +#include <bio/bio_writer.h> +#include <bio/bio_reader.h> +#include <utils/linked_list.h> + +#include <debug.h> + +typedef struct private_ietf_attr_attr_request_t private_ietf_attr_attr_request_t; + +/** + * PA-TNC Attribute Request type (see section 4.2.1 of RFC 5792) + * + * 1 2 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Reserved | PA-TNC Attribute Vendor ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | PA-TNC Attribute Type | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Reserved | PA-TNC Attribute Vendor ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | PA-TNC Attribute Type | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + +#define ATTR_REQUEST_ENTRY_SIZE 8 + +/** + * Private data of an ietf_attr_attr_request_t object. + */ +struct private_ietf_attr_attr_request_t { + + /** + * Public members of ietf_attr_attr_request_t + */ + ietf_attr_attr_request_t public; + + /** + * Vendor-specific attribute type + */ + pen_type_t type; + + /** + * Attribute value + */ + chunk_t value; + + /** + * Noskip flag + */ + bool noskip_flag; + + /** + * List of requested attribute types + */ + linked_list_t *list; + + /** + * Reference count + */ + refcount_t ref; +}; + +METHOD(pa_tnc_attr_t, get_type, pen_type_t, + private_ietf_attr_attr_request_t *this) +{ + return this->type; +} + +METHOD(pa_tnc_attr_t, get_value, chunk_t, + private_ietf_attr_attr_request_t *this) +{ + return this->value; +} + +METHOD(pa_tnc_attr_t, get_noskip_flag, bool, + private_ietf_attr_attr_request_t *this) +{ + return this->noskip_flag; +} + +METHOD(pa_tnc_attr_t, set_noskip_flag,void, + private_ietf_attr_attr_request_t *this, bool noskip) +{ + this->noskip_flag = noskip; +} + +METHOD(pa_tnc_attr_t, build, void, + private_ietf_attr_attr_request_t *this) +{ + bio_writer_t *writer; + enumerator_t *enumerator; + pen_type_t *entry; + + if (this->value.ptr) + { + return; + } + writer = bio_writer_create(ATTR_REQUEST_ENTRY_SIZE * + this->list->get_count(this->list)); + + enumerator = this->list->create_enumerator(this->list); + while (enumerator->enumerate(enumerator, &entry)) + { + writer->write_uint32(writer, entry->vendor_id); + writer->write_uint32(writer, entry->type); + } + enumerator->destroy(enumerator); + + this->value = chunk_clone(writer->get_buf(writer)); + writer->destroy(writer); +} + +METHOD(ietf_attr_attr_request_t, add, void, + private_ietf_attr_attr_request_t *this, pen_t vendor_id, u_int32_t type) +{ + pen_type_t *entry; + + entry = malloc_thing(pen_type_t); + entry->vendor_id = vendor_id; + entry->type = type; + this->list->insert_last(this->list, entry); +} + +METHOD(pa_tnc_attr_t, process, status_t, + private_ietf_attr_attr_request_t *this, u_int32_t *offset) +{ + bio_reader_t *reader; + enum_name_t *pa_attr_names; + pen_t vendor_id; + u_int32_t type; + u_int8_t reserved; + int count; + + count = this->value.len / ATTR_REQUEST_ENTRY_SIZE; + if (this->value.len != ATTR_REQUEST_ENTRY_SIZE * count) + { + DBG1(DBG_TNC, "incorrect attribute length for IETF attribute request"); + *offset = 0; + return FAILED; + } + + reader = bio_reader_create(this->value); + while (count--) + { + reader->read_uint8 (reader, &reserved); + reader->read_uint24(reader, &vendor_id); + reader->read_uint32(reader, &type); + + pa_attr_names = imcv_pa_tnc_attributes->get_names(imcv_pa_tnc_attributes, + vendor_id); + if (pa_attr_names) + { + DBG2(DBG_TNC, " 0x%06x/0x%08x '%N/%N'", vendor_id, type, + pen_names, vendor_id, pa_attr_names, type); + } + else + { + DBG2(DBG_TNC, " 0x%06x/0x%08x '%N'", vendor_id, type, + pen_names, vendor_id); + } + add(this, vendor_id, type); + } + reader->destroy(reader); + + return SUCCESS; +} + +METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*, + private_ietf_attr_attr_request_t *this) +{ + ref_get(&this->ref); + return &this->public.pa_tnc_attribute; +} + +METHOD(pa_tnc_attr_t, destroy, void, + private_ietf_attr_attr_request_t *this) +{ + if (ref_put(&this->ref)) + { + this->list->destroy_function(this->list, free); + free(this->value.ptr); + free(this); + } +} + +METHOD(ietf_attr_attr_request_t, create_enumerator, enumerator_t*, + private_ietf_attr_attr_request_t *this) +{ + return this->list->create_enumerator(this->list); +} + +/** + * Described in header. + */ +pa_tnc_attr_t *ietf_attr_attr_request_create(pen_t vendor_id, u_int32_t type) +{ + private_ietf_attr_attr_request_t *this; + + INIT(this, + .public = { + .pa_tnc_attribute = { + .get_type = _get_type, + .get_value = _get_value, + .get_noskip_flag = _get_noskip_flag, + .set_noskip_flag = _set_noskip_flag, + .build = _build, + .process = _process, + .get_ref = _get_ref, + .destroy = _destroy, + }, + .add = _add, + .create_enumerator = _create_enumerator, + }, + .type = { PEN_IETF, IETF_ATTR_ATTRIBUTE_REQUEST }, + .list = linked_list_create(), + .ref = 1, + ); + add(this, vendor_id, type); + + return &this->public.pa_tnc_attribute; +} + +/** + * Described in header. + */ +pa_tnc_attr_t *ietf_attr_attr_request_create_from_data(chunk_t data) +{ + private_ietf_attr_attr_request_t *this; + + INIT(this, + .public = { + .pa_tnc_attribute = { + .get_type = _get_type, + .get_value = _get_value, + .build = _build, + .process = _process, + .get_ref = _get_ref, + .destroy = _destroy, + }, + .add = _add, + .create_enumerator = _create_enumerator, + }, + .type = { PEN_IETF,IETF_ATTR_ATTRIBUTE_REQUEST }, + .value = chunk_clone(data), + .list = linked_list_create(), + .ref = 1, + ); + + return &this->public.pa_tnc_attribute; +} + |