diff options
Diffstat (limited to 'src/libimcv/ietf/swima/ietf_swima_attr_req.c')
| -rw-r--r-- | src/libimcv/ietf/swima/ietf_swima_attr_req.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/src/libimcv/ietf/swima/ietf_swima_attr_req.c b/src/libimcv/ietf/swima/ietf_swima_attr_req.c new file mode 100644 index 000000000..07d0b0c5f --- /dev/null +++ b/src/libimcv/ietf/swima/ietf_swima_attr_req.c @@ -0,0 +1,320 @@ +/* + * Copyright (C) 2017 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 "ietf_swima_attr_req.h" +#include "swima/swima_record.h" + +#include <pa_tnc/pa_tnc_msg.h> +#include <bio/bio_writer.h> +#include <bio/bio_reader.h> +#include <utils/debug.h> +#include <collections/linked_list.h> + +typedef struct private_ietf_swima_attr_req_t private_ietf_swima_attr_req_t; + +/** + * SW Request + * see section 5.7 of IETF SW Inventory Message and Attributes for PA-TNC + * + * 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 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |C|S|R| Reserved| Software Identifier Count | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Request ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Earliest EID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Software Identifier Length | Software Identifier (Var Len) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + +#define SW_REQ_RESERVED_MASK 0xE0 + +/** + * Private data of an ietf_swima_attr_req_t object. + */ +struct private_ietf_swima_attr_req_t { + + /** + * Public members of ietf_swima_attr_req_t + */ + ietf_swima_attr_req_t public; + + /** + * Vendor-specific attribute type + */ + pen_type_t type; + + /** + * Length of attribute value + */ + size_t length; + + /** + * Attribute value or segment + */ + chunk_t value; + + /** + * Noskip flag + */ + bool noskip_flag; + + /** + * SWID request flags + */ + uint8_t flags; + + /** + * Request ID + */ + uint32_t request_id; + + /** + * Inventory of Target Software Identifiers + */ + swima_inventory_t *targets; + + /** + * Reference count + */ + refcount_t ref; +}; + +METHOD(pa_tnc_attr_t, get_type, pen_type_t, + private_ietf_swima_attr_req_t *this) +{ + return this->type; +} + +METHOD(pa_tnc_attr_t, get_value, chunk_t, + private_ietf_swima_attr_req_t *this) +{ + return this->value; +} + +METHOD(pa_tnc_attr_t, get_noskip_flag, bool, + private_ietf_swima_attr_req_t *this) +{ + return this->noskip_flag; +} + +METHOD(pa_tnc_attr_t, set_noskip_flag,void, + private_ietf_swima_attr_req_t *this, bool noskip) +{ + this->noskip_flag = noskip; +} + +METHOD(pa_tnc_attr_t, build, void, + private_ietf_swima_attr_req_t *this) +{ + bio_writer_t *writer; + swima_record_t *sw_record; + uint32_t earliest_eid; + chunk_t sw_id; + enumerator_t *enumerator; + + if (this->value.ptr) + { + return; + } + earliest_eid = this->targets->get_eid(this->targets, NULL); + + writer = bio_writer_create(IETF_SWIMA_REQ_MIN_SIZE); + writer->write_uint8 (writer, this->flags); + writer->write_uint24(writer, this->targets->get_count(this->targets)); + writer->write_uint32(writer, this->request_id); + writer->write_uint32(writer, earliest_eid); + + enumerator = this->targets->create_enumerator(this->targets); + while (enumerator->enumerate(enumerator, &sw_record)) + { + sw_id = sw_record->get_sw_id(sw_record, NULL); + writer->write_data16(writer, sw_id); + } + enumerator->destroy(enumerator); + + this->value = writer->extract_buf(writer); + this->length = this->value.len; + writer->destroy(writer); +} + +METHOD(pa_tnc_attr_t, process, status_t, + private_ietf_swima_attr_req_t *this, uint32_t *offset) +{ + bio_reader_t *reader; + swima_record_t *sw_record; + uint32_t sw_id_count, earliest_eid; + chunk_t sw_id; + + *offset = 0; + + if (this->value.len < this->length) + { + return NEED_MORE; + } + if (this->value.len < IETF_SWIMA_REQ_MIN_SIZE) + { + DBG1(DBG_TNC, "insufficient data for SW Request"); + return FAILED; + } + + reader = bio_reader_create(this->value); + reader->read_uint8 (reader, &this->flags); + reader->read_uint24(reader, &sw_id_count); + reader->read_uint32(reader, &this->request_id); + reader->read_uint32(reader, &earliest_eid); + + *offset = IETF_SWIMA_REQ_MIN_SIZE; + this->flags &= SW_REQ_RESERVED_MASK; + this->targets->set_eid(this->targets, earliest_eid, 0); + + while (sw_id_count--) + { + if (!reader->read_data16(reader, &sw_id)) + { + DBG1(DBG_TNC, "insufficient data for Software ID"); + reader->destroy(reader); + return FAILED; + } + *offset += 2 + sw_id.len; + + sw_record = swima_record_create(0, sw_id, chunk_empty); + this->targets->add(this->targets, sw_record); + } + reader->destroy(reader); + + return SUCCESS; +} + +METHOD(pa_tnc_attr_t, add_segment, void, + private_ietf_swima_attr_req_t *this, chunk_t segment) +{ + this->value = chunk_cat("mc", this->value, segment); +} + +METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*, + private_ietf_swima_attr_req_t *this) +{ + ref_get(&this->ref); + return &this->public.pa_tnc_attribute; +} + +METHOD(pa_tnc_attr_t, destroy, void, + private_ietf_swima_attr_req_t *this) +{ + if (ref_put(&this->ref)) + { + this->targets->destroy(this->targets); + free(this->value.ptr); + free(this); + } +} + +METHOD(ietf_swima_attr_req_t, get_flags, uint8_t, + private_ietf_swima_attr_req_t *this) +{ + return this->flags; +} + +METHOD(ietf_swima_attr_req_t, get_request_id, uint32_t, + private_ietf_swima_attr_req_t *this) +{ + return this->request_id; +} + +METHOD(ietf_swima_attr_req_t, set_targets, void, + private_ietf_swima_attr_req_t *this, swima_inventory_t *targets) +{ + this->targets->destroy(this->targets); + this->targets = targets->get_ref(targets); +} + +METHOD(ietf_swima_attr_req_t, get_targets, swima_inventory_t*, + private_ietf_swima_attr_req_t *this) +{ + return this->targets; +} + +/** + * Described in header. + */ +pa_tnc_attr_t *ietf_swima_attr_req_create(uint8_t flags, uint32_t request_id) +{ + private_ietf_swima_attr_req_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, + .add_segment = _add_segment, + .get_ref = _get_ref, + .destroy = _destroy, + }, + .get_flags = _get_flags, + .get_request_id = _get_request_id, + .set_targets = _set_targets, + .get_targets = _get_targets, + }, + .type = { PEN_IETF, IETF_ATTR_SW_REQUEST }, + .flags = flags & SW_REQ_RESERVED_MASK, + .request_id = request_id, + .targets = swima_inventory_create(), + .ref = 1, + ); + + return &this->public.pa_tnc_attribute; +} + +/** + * Described in header. + */ +pa_tnc_attr_t *ietf_swima_attr_req_create_from_data(size_t length, chunk_t data) +{ + private_ietf_swima_attr_req_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, + .add_segment = _add_segment, + .get_ref = _get_ref, + .destroy = _destroy, + }, + .get_flags = _get_flags, + .get_request_id = _get_request_id, + .set_targets = _set_targets, + .get_targets = _get_targets, + }, + .type = { PEN_IETF, IETF_ATTR_SW_REQUEST }, + .length = length, + .value = chunk_clone(data), + .targets = swima_inventory_create(), + .ref = 1, + ); + + return &this->public.pa_tnc_attribute; +} |