410 lines
9.6 KiB
C
410 lines
9.6 KiB
C
/*
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* Copyright (C) 2012-2014 Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "ietf_attr_installed_packages.h"
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#include <string.h>
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#include <pa_tnc/pa_tnc_msg.h>
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#include <bio/bio_writer.h>
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#include <bio/bio_reader.h>
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#include <collections/linked_list.h>
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#include <utils/debug.h>
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typedef struct private_ietf_attr_installed_packages_t private_ietf_attr_installed_packages_t;
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typedef struct package_entry_t package_entry_t;
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/**
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* PA-TNC Installed Packages Type (see section 4.2.7 of RFC 5792)
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*
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* 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reserved | Package Count |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Pkg Name Len | Package Name (Variable Length) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Version Len | Package Version Number (Variable Length) |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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/**
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* Private data of an ietf_attr_installed_packages_t object.
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*/
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struct private_ietf_attr_installed_packages_t {
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/**
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* Public members of ietf_attr_installed_packages_t
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*/
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ietf_attr_installed_packages_t public;
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/**
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* Vendor-specific attribute type
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*/
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pen_type_t type;
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/**
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* Length of attribute value
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*/
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size_t length;
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/**
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* Offset up to which attribute value has been processed
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*/
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size_t offset;
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/**
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* Current position of attribute value pointer
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*/
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chunk_t value;
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/**
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* Contains complete attribute or current segment
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*/
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chunk_t segment;
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/**
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* Noskip flag
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*/
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bool noskip_flag;
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/**
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* Number of Installed Packages in attribute
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*/
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uint16_t count;
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/**
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* List of Installed Package entries
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*/
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linked_list_t *packages;
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/**
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* Reference count
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*/
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refcount_t ref;
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};
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/**
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* Package entry
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*/
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struct package_entry_t {
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chunk_t name;
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chunk_t version;
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};
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/**
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* Free a package entry
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*/
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static void free_package_entry(package_entry_t *entry)
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{
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free(entry->name.ptr);
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free(entry->version.ptr);
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free(entry);
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}
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METHOD(pa_tnc_attr_t, get_type, pen_type_t,
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private_ietf_attr_installed_packages_t *this)
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{
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return this->type;
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}
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METHOD(pa_tnc_attr_t, get_value, chunk_t,
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private_ietf_attr_installed_packages_t *this)
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{
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return this->value;
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}
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METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
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private_ietf_attr_installed_packages_t *this)
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{
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return this->noskip_flag;
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}
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METHOD(pa_tnc_attr_t, set_noskip_flag,void,
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private_ietf_attr_installed_packages_t *this, bool noskip)
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{
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this->noskip_flag = noskip;
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}
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METHOD(pa_tnc_attr_t, build, void,
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private_ietf_attr_installed_packages_t *this)
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{
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bio_writer_t *writer;
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enumerator_t *enumerator;
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package_entry_t *entry;
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if (this->value.ptr)
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{
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return;
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}
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writer = bio_writer_create(IETF_INSTALLED_PACKAGES_MIN_SIZE);
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writer->write_uint16(writer, 0x0000);
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writer->write_uint16(writer, this->packages->get_count(this->packages));
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enumerator = this->packages->create_enumerator(this->packages);
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while (enumerator->enumerate(enumerator, &entry))
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{
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writer->write_data8(writer, entry->name);
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writer->write_data8(writer, entry->version);
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}
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enumerator->destroy(enumerator);
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this->value = writer->extract_buf(writer);
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this->segment = this->value;
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this->length = this->value.len;
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writer->destroy(writer);
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}
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METHOD(pa_tnc_attr_t, process, status_t,
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private_ietf_attr_installed_packages_t *this, uint32_t *offset)
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{
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bio_reader_t *reader;
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package_entry_t *entry;
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status_t status = NEED_MORE;
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chunk_t name, version;
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uint16_t reserved;
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u_char *pos;
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if (this->offset == 0)
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{
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if (this->length < IETF_INSTALLED_PACKAGES_MIN_SIZE)
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{
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DBG1(DBG_TNC, "insufficient data for %N/%N", pen_names, PEN_IETF,
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ietf_attr_names, this->type.type);
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*offset = this->offset;
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return FAILED;
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}
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if (this->value.len < IETF_INSTALLED_PACKAGES_MIN_SIZE)
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{
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return NEED_MORE;
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}
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reader = bio_reader_create(this->value);
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reader->read_uint16(reader, &reserved);
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reader->read_uint16(reader, &this->count);
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this->offset = IETF_INSTALLED_PACKAGES_MIN_SIZE;
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this->value = reader->peek(reader);
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reader->destroy(reader);
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}
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reader = bio_reader_create(this->value);
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while (this->count)
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{
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if (!reader->read_data8(reader, &name) ||
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!reader->read_data8(reader, &version))
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{
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goto end;
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}
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pos = memchr(name.ptr, '\0', name.len);
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if (pos)
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{
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DBG1(DBG_TNC, "nul termination in IETF installed package name");
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*offset = this->offset + 1 + (pos - name.ptr);
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status = FAILED;
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goto end;
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}
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pos = memchr(version.ptr, '\0', version.len);
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if (pos)
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{
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DBG1(DBG_TNC, "nul termination in IETF installed package version");
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*offset = this->offset + 1 + name.len + 1 + (pos - version.ptr);
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status = FAILED;
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goto end;
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}
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this->offset += this->value.len - reader->remaining(reader);
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this->value = reader->peek(reader);
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entry = malloc_thing(package_entry_t);
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entry->name = chunk_clone(name);
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entry->version = chunk_clone(version);
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this->packages->insert_last(this->packages, entry);
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/* at least one tag ID was processed */
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status = SUCCESS;
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this->count--;
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}
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if (this->length != this->offset)
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{
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DBG1(DBG_TNC, "inconsistent length for %N/%N", pen_names, PEN_IETF,
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ietf_attr_names, this->type.type);
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*offset = this->offset;
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status = FAILED;
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}
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end:
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reader->destroy(reader);
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return status;
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}
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METHOD(pa_tnc_attr_t, add_segment, void,
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private_ietf_attr_installed_packages_t *this, chunk_t segment)
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{
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this->value = chunk_cat("cc", this->value, segment);
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chunk_free(&this->segment);
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this->segment = this->value;
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}
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METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
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private_ietf_attr_installed_packages_t *this)
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{
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ref_get(&this->ref);
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return &this->public.pa_tnc_attribute;
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}
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METHOD(pa_tnc_attr_t, destroy, void,
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private_ietf_attr_installed_packages_t *this)
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{
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if (ref_put(&this->ref))
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{
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this->packages->destroy_function(this->packages, (void*)free_package_entry);
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free(this->segment.ptr);
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free(this);
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}
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}
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METHOD(ietf_attr_installed_packages_t, add, void,
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private_ietf_attr_installed_packages_t *this, chunk_t name, chunk_t version)
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{
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package_entry_t *entry;
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/* restrict package name and package version number fields to 255 octets */
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name.len = min(255, name.len);
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version.len = min(255, version.len);
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entry = malloc_thing(package_entry_t);
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entry->name = chunk_clone(name);
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entry->version = chunk_clone(version);
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this->packages->insert_last(this->packages, entry);
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}
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CALLBACK(package_filter, bool,
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void *null, enumerator_t *orig, va_list args)
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{
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package_entry_t *entry;
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chunk_t *name, *version;
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VA_ARGS_VGET(args, name, version);
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if (orig->enumerate(orig, &entry))
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{
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*name = entry->name;
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*version = entry->version;
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return TRUE;
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}
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return FALSE;
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}
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METHOD(ietf_attr_installed_packages_t, create_enumerator, enumerator_t*,
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private_ietf_attr_installed_packages_t *this)
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{
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return enumerator_create_filter(
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this->packages->create_enumerator(this->packages),
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package_filter, NULL, NULL);
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}
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METHOD(ietf_attr_installed_packages_t, get_count, uint16_t,
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private_ietf_attr_installed_packages_t *this)
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{
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return this->count;
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}
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METHOD(ietf_attr_installed_packages_t, clear_packages, void,
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private_ietf_attr_installed_packages_t *this)
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{
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package_entry_t *entry;
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while (this->packages->remove_first(this->packages,(void**)&entry) == SUCCESS)
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{
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free_package_entry(entry);
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}
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *ietf_attr_installed_packages_create(void)
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{
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private_ietf_attr_installed_packages_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.add_segment = _add_segment,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.add = _add,
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.create_enumerator = _create_enumerator,
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.get_count = _get_count,
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.clear_packages = _clear_packages,
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},
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.type = { PEN_IETF, IETF_ATTR_INSTALLED_PACKAGES },
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.packages = linked_list_create(),
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.ref = 1,
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);
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return &this->public.pa_tnc_attribute;
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}
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/**
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* Described in header. .length = length,
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*/
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pa_tnc_attr_t *ietf_attr_installed_packages_create_from_data(size_t length,
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chunk_t data)
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{
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private_ietf_attr_installed_packages_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.add_segment = _add_segment,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.add = _add,
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.create_enumerator = _create_enumerator,
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.get_count = _get_count,
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.clear_packages = _clear_packages,
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},
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.type = {PEN_IETF, IETF_ATTR_INSTALLED_PACKAGES },
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.length = length,
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.segment = chunk_clone(data),
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.packages = linked_list_create(),
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.ref = 1,
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);
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/* received either complete attribute value or first segment */
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this->value = this->segment;
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return &this->public.pa_tnc_attribute;
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}
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