diff options
Diffstat (limited to 'src/libimcv/ietf/ietf_attr_string_version.c')
| -rw-r--r-- | src/libimcv/ietf/ietf_attr_string_version.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/src/libimcv/ietf/ietf_attr_string_version.c b/src/libimcv/ietf/ietf_attr_string_version.c new file mode 100644 index 000000000..8f4129eac --- /dev/null +++ b/src/libimcv/ietf/ietf_attr_string_version.c @@ -0,0 +1,300 @@ +/* + * 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 "ietf_attr_string_version.h" + +#include <pa_tnc/pa_tnc_msg.h> +#include <bio/bio_writer.h> +#include <bio/bio_reader.h> +#include <utils/debug.h> + +typedef struct private_ietf_attr_string_version_t private_ietf_attr_string_version_t; + +/** + * PA-TNC String Version type (see section 4.2.4 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 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Version Len | Product Version Number (Variable Length) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Build Num Len | Internal Build Number (Variable Length) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Config. Len | Configuration Version Number (Variable Length)| + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + +#define STRING_VERSION_MIN_SIZE 3 + +/** + * Private data of an ietf_attr_string_version_t object. + */ +struct private_ietf_attr_string_version_t { + + /** + * Public members of ietf_attr_string_version_t + */ + ietf_attr_string_version_t public; + + /** + * Vendor-specific attribute type + */ + pen_type_t type; + + /** + * Attribute value + */ + chunk_t value; + + /** + * Noskip flag + */ + bool noskip_flag; + + /** + * Product Version Number + */ + chunk_t version; + + /** + * Internal Build Number + */ + chunk_t build; + + /** + * Configuration Version Number + */ + chunk_t config; + + /** + * Reference count + */ + refcount_t ref; +}; + +METHOD(pa_tnc_attr_t, get_type, pen_type_t, + private_ietf_attr_string_version_t *this) +{ + return this->type; +} + +METHOD(pa_tnc_attr_t, get_value, chunk_t, + private_ietf_attr_string_version_t *this) +{ + return this->value; +} + +METHOD(pa_tnc_attr_t, get_noskip_flag, bool, + private_ietf_attr_string_version_t *this) +{ + return this->noskip_flag; +} + +METHOD(pa_tnc_attr_t, set_noskip_flag,void, + private_ietf_attr_string_version_t *this, bool noskip) +{ + this->noskip_flag = noskip; +} + +METHOD(pa_tnc_attr_t, build, void, + private_ietf_attr_string_version_t *this) +{ + bio_writer_t *writer; + + if (this->value.ptr) + { + return; + } + + writer = bio_writer_create(STRING_VERSION_MIN_SIZE); + writer->write_data8(writer, this->version); + writer->write_data8(writer, this->build); + writer->write_data8(writer, this->config); + + this->value = chunk_clone(writer->get_buf(writer)); + writer->destroy(writer); +} + +METHOD(pa_tnc_attr_t, process, status_t, + private_ietf_attr_string_version_t *this, u_int32_t *offset) +{ + bio_reader_t *reader; + status_t status = FAILED; + chunk_t version, build, config; + u_char *pos; + + *offset = 0; + + if (this->value.len < STRING_VERSION_MIN_SIZE) + { + DBG1(DBG_TNC, "insufficient data for IETF string version"); + return FAILED; + } + reader = bio_reader_create(this->value); + + if (!reader->read_data8(reader, &version)) + { + DBG1(DBG_TNC, "insufficient data for IETF product version number"); + goto end; + + } + pos = memchr(version.ptr, '\0', version.len); + if (pos) + { + DBG1(DBG_TNC, "nul termination in IETF product version number"); + *offset += 1 + (pos - version.ptr); + goto end; + } + *offset += 1 + version.len; + + if (!reader->read_data8(reader, &build)) + { + DBG1(DBG_TNC, "insufficient data for IETF internal build number"); + goto end; + + } + pos = memchr(build.ptr, '\0', build.len); + if (pos) + { + DBG1(DBG_TNC, "nul termination in IETF internal build number"); + *offset += 1 + (pos - build.ptr); + goto end; + } + *offset += 1 + build.len; + + if (!reader->read_data8(reader, &config)) + { + DBG1(DBG_TNC, "insufficient data for IETF configuration version number"); + goto end; + + } + pos = memchr(config.ptr, '\0', config.len); + if (pos) + { + DBG1(DBG_TNC, "nul termination in IETF configuration version number"); + *offset += 1 + (pos - config.ptr); + goto end; + } + + this->version = chunk_clone(version); + this->build = chunk_clone(build); + this->config = chunk_clone(config); + status = SUCCESS; + +end: + reader->destroy(reader); + return status; +} + +METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*, + private_ietf_attr_string_version_t *this) +{ + ref_get(&this->ref); + return &this->public.pa_tnc_attribute; +} + +METHOD(pa_tnc_attr_t, destroy, void, + private_ietf_attr_string_version_t *this) +{ + if (ref_put(&this->ref)) + { + free(this->version.ptr); + free(this->build.ptr); + free(this->config.ptr); + free(this->value.ptr); + free(this); + } +} + +METHOD(ietf_attr_string_version_t, get_version, chunk_t, + private_ietf_attr_string_version_t *this, chunk_t *build, chunk_t *config) +{ + if (build) + { + *build = this->build; + } + if (config) + { + *config = this->config; + } + return this->version; +} + +/** + * Described in header. + */ +pa_tnc_attr_t *ietf_attr_string_version_create(chunk_t version, chunk_t build, + chunk_t config) +{ + private_ietf_attr_string_version_t *this; + + /* limit version numbers to 255 octets */ + version.len = min(255, version.len); + build.len = min(255, build.len); + config.len = min(255, config.len); + + 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, + }, + .get_version = _get_version, + }, + .type = { PEN_IETF, IETF_ATTR_STRING_VERSION }, + .version = chunk_clone(version), + .build = chunk_clone(build), + .config = chunk_clone(config), + .ref = 1, + ); + + return &this->public.pa_tnc_attribute; +} + +/** + * Described in header. + */ +pa_tnc_attr_t *ietf_attr_string_version_create_from_data(chunk_t data) +{ + private_ietf_attr_string_version_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, + }, + .get_version = _get_version, + }, + .type = { PEN_IETF, IETF_ATTR_STRING_VERSION }, + .value = chunk_clone(data), + .ref = 1, + ); + + return &this->public.pa_tnc_attribute; +} + |