Annotation of embedaddon/strongswan/src/libimcv/ietf/ietf_attr_installed_packages.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2012-2014 Andreas Steffen
! 3: * HSR Hochschule fuer Technik Rapperswil
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #include "ietf_attr_installed_packages.h"
! 17:
! 18: #include <string.h>
! 19:
! 20: #include <pa_tnc/pa_tnc_msg.h>
! 21: #include <bio/bio_writer.h>
! 22: #include <bio/bio_reader.h>
! 23: #include <collections/linked_list.h>
! 24: #include <utils/debug.h>
! 25:
! 26:
! 27: typedef struct private_ietf_attr_installed_packages_t private_ietf_attr_installed_packages_t;
! 28: typedef struct package_entry_t package_entry_t;
! 29:
! 30: /**
! 31: * PA-TNC Installed Packages Type (see section 4.2.7 of RFC 5792)
! 32: *
! 33: * 1 2 3
! 34: * 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
! 35: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 36: * | Reserved | Package Count |
! 37: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 38: * | Pkg Name Len | Package Name (Variable Length) |
! 39: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 40: * | Version Len | Package Version Number (Variable Length) |
! 41: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 42: */
! 43:
! 44: /**
! 45: * Private data of an ietf_attr_installed_packages_t object.
! 46: */
! 47: struct private_ietf_attr_installed_packages_t {
! 48:
! 49: /**
! 50: * Public members of ietf_attr_installed_packages_t
! 51: */
! 52: ietf_attr_installed_packages_t public;
! 53:
! 54: /**
! 55: * Vendor-specific attribute type
! 56: */
! 57: pen_type_t type;
! 58:
! 59: /**
! 60: * Length of attribute value
! 61: */
! 62: size_t length;
! 63:
! 64: /**
! 65: * Offset up to which attribute value has been processed
! 66: */
! 67: size_t offset;
! 68:
! 69: /**
! 70: * Current position of attribute value pointer
! 71: */
! 72: chunk_t value;
! 73:
! 74: /**
! 75: * Contains complete attribute or current segment
! 76: */
! 77: chunk_t segment;
! 78:
! 79: /**
! 80: * Noskip flag
! 81: */
! 82: bool noskip_flag;
! 83:
! 84: /**
! 85: * Number of Installed Packages in attribute
! 86: */
! 87: uint16_t count;
! 88:
! 89: /**
! 90: * List of Installed Package entries
! 91: */
! 92: linked_list_t *packages;
! 93:
! 94: /**
! 95: * Reference count
! 96: */
! 97: refcount_t ref;
! 98: };
! 99:
! 100: /**
! 101: * Package entry
! 102: */
! 103: struct package_entry_t {
! 104: chunk_t name;
! 105: chunk_t version;
! 106: };
! 107:
! 108: /**
! 109: * Free a package entry
! 110: */
! 111: static void free_package_entry(package_entry_t *entry)
! 112: {
! 113: free(entry->name.ptr);
! 114: free(entry->version.ptr);
! 115: free(entry);
! 116: }
! 117:
! 118: METHOD(pa_tnc_attr_t, get_type, pen_type_t,
! 119: private_ietf_attr_installed_packages_t *this)
! 120: {
! 121: return this->type;
! 122: }
! 123:
! 124: METHOD(pa_tnc_attr_t, get_value, chunk_t,
! 125: private_ietf_attr_installed_packages_t *this)
! 126: {
! 127: return this->value;
! 128: }
! 129:
! 130: METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
! 131: private_ietf_attr_installed_packages_t *this)
! 132: {
! 133: return this->noskip_flag;
! 134: }
! 135:
! 136: METHOD(pa_tnc_attr_t, set_noskip_flag,void,
! 137: private_ietf_attr_installed_packages_t *this, bool noskip)
! 138: {
! 139: this->noskip_flag = noskip;
! 140: }
! 141:
! 142: METHOD(pa_tnc_attr_t, build, void,
! 143: private_ietf_attr_installed_packages_t *this)
! 144: {
! 145: bio_writer_t *writer;
! 146: enumerator_t *enumerator;
! 147: package_entry_t *entry;
! 148:
! 149: if (this->value.ptr)
! 150: {
! 151: return;
! 152: }
! 153: writer = bio_writer_create(IETF_INSTALLED_PACKAGES_MIN_SIZE);
! 154: writer->write_uint16(writer, 0x0000);
! 155: writer->write_uint16(writer, this->packages->get_count(this->packages));
! 156:
! 157: enumerator = this->packages->create_enumerator(this->packages);
! 158: while (enumerator->enumerate(enumerator, &entry))
! 159: {
! 160: writer->write_data8(writer, entry->name);
! 161: writer->write_data8(writer, entry->version);
! 162: }
! 163: enumerator->destroy(enumerator);
! 164:
! 165: this->value = writer->extract_buf(writer);
! 166: this->segment = this->value;
! 167: this->length = this->value.len;
! 168: writer->destroy(writer);
! 169: }
! 170:
! 171: METHOD(pa_tnc_attr_t, process, status_t,
! 172: private_ietf_attr_installed_packages_t *this, uint32_t *offset)
! 173: {
! 174: bio_reader_t *reader;
! 175: package_entry_t *entry;
! 176: status_t status = NEED_MORE;
! 177: chunk_t name, version;
! 178: uint16_t reserved;
! 179: u_char *pos;
! 180:
! 181: if (this->offset == 0)
! 182: {
! 183: if (this->length < IETF_INSTALLED_PACKAGES_MIN_SIZE)
! 184: {
! 185: DBG1(DBG_TNC, "insufficient data for %N/%N", pen_names, PEN_IETF,
! 186: ietf_attr_names, this->type.type);
! 187: *offset = this->offset;
! 188: return FAILED;
! 189: }
! 190: if (this->value.len < IETF_INSTALLED_PACKAGES_MIN_SIZE)
! 191: {
! 192: return NEED_MORE;
! 193: }
! 194: reader = bio_reader_create(this->value);
! 195: reader->read_uint16(reader, &reserved);
! 196: reader->read_uint16(reader, &this->count);
! 197: this->offset = IETF_INSTALLED_PACKAGES_MIN_SIZE;
! 198: this->value = reader->peek(reader);
! 199: reader->destroy(reader);
! 200: }
! 201:
! 202: reader = bio_reader_create(this->value);
! 203:
! 204: while (this->count)
! 205: {
! 206: if (!reader->read_data8(reader, &name) ||
! 207: !reader->read_data8(reader, &version))
! 208: {
! 209: goto end;
! 210: }
! 211: pos = memchr(name.ptr, '\0', name.len);
! 212: if (pos)
! 213: {
! 214: DBG1(DBG_TNC, "nul termination in IETF installed package name");
! 215: *offset = this->offset + 1 + (pos - name.ptr);
! 216: status = FAILED;
! 217: goto end;
! 218: }
! 219: pos = memchr(version.ptr, '\0', version.len);
! 220: if (pos)
! 221: {
! 222: DBG1(DBG_TNC, "nul termination in IETF installed package version");
! 223: *offset = this->offset + 1 + name.len + 1 + (pos - version.ptr);
! 224: status = FAILED;
! 225: goto end;
! 226: }
! 227: this->offset += this->value.len - reader->remaining(reader);
! 228: this->value = reader->peek(reader);
! 229:
! 230: entry = malloc_thing(package_entry_t);
! 231: entry->name = chunk_clone(name);
! 232: entry->version = chunk_clone(version);
! 233: this->packages->insert_last(this->packages, entry);
! 234:
! 235: /* at least one tag ID was processed */
! 236: status = SUCCESS;
! 237: this->count--;
! 238: }
! 239:
! 240: if (this->length != this->offset)
! 241: {
! 242: DBG1(DBG_TNC, "inconsistent length for %N/%N", pen_names, PEN_IETF,
! 243: ietf_attr_names, this->type.type);
! 244: *offset = this->offset;
! 245: status = FAILED;
! 246: }
! 247:
! 248: end:
! 249: reader->destroy(reader);
! 250: return status;
! 251: }
! 252:
! 253: METHOD(pa_tnc_attr_t, add_segment, void,
! 254: private_ietf_attr_installed_packages_t *this, chunk_t segment)
! 255: {
! 256: this->value = chunk_cat("cc", this->value, segment);
! 257: chunk_free(&this->segment);
! 258: this->segment = this->value;
! 259: }
! 260:
! 261: METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
! 262: private_ietf_attr_installed_packages_t *this)
! 263: {
! 264: ref_get(&this->ref);
! 265: return &this->public.pa_tnc_attribute;
! 266: }
! 267:
! 268: METHOD(pa_tnc_attr_t, destroy, void,
! 269: private_ietf_attr_installed_packages_t *this)
! 270: {
! 271: if (ref_put(&this->ref))
! 272: {
! 273: this->packages->destroy_function(this->packages, (void*)free_package_entry);
! 274: free(this->segment.ptr);
! 275: free(this);
! 276: }
! 277: }
! 278:
! 279: METHOD(ietf_attr_installed_packages_t, add, void,
! 280: private_ietf_attr_installed_packages_t *this, chunk_t name, chunk_t version)
! 281: {
! 282: package_entry_t *entry;
! 283:
! 284: /* restrict package name and package version number fields to 255 octets */
! 285: name.len = min(255, name.len);
! 286: version.len = min(255, version.len);
! 287:
! 288: entry = malloc_thing(package_entry_t);
! 289: entry->name = chunk_clone(name);
! 290: entry->version = chunk_clone(version);
! 291: this->packages->insert_last(this->packages, entry);
! 292: }
! 293:
! 294: CALLBACK(package_filter, bool,
! 295: void *null, enumerator_t *orig, va_list args)
! 296: {
! 297: package_entry_t *entry;
! 298: chunk_t *name, *version;
! 299:
! 300: VA_ARGS_VGET(args, name, version);
! 301:
! 302: if (orig->enumerate(orig, &entry))
! 303: {
! 304: *name = entry->name;
! 305: *version = entry->version;
! 306: return TRUE;
! 307: }
! 308: return FALSE;
! 309: }
! 310:
! 311: METHOD(ietf_attr_installed_packages_t, create_enumerator, enumerator_t*,
! 312: private_ietf_attr_installed_packages_t *this)
! 313: {
! 314: return enumerator_create_filter(
! 315: this->packages->create_enumerator(this->packages),
! 316: package_filter, NULL, NULL);
! 317: }
! 318:
! 319: METHOD(ietf_attr_installed_packages_t, get_count, uint16_t,
! 320: private_ietf_attr_installed_packages_t *this)
! 321: {
! 322: return this->count;
! 323: }
! 324:
! 325: METHOD(ietf_attr_installed_packages_t, clear_packages, void,
! 326: private_ietf_attr_installed_packages_t *this)
! 327: {
! 328: package_entry_t *entry;
! 329:
! 330: while (this->packages->remove_first(this->packages,(void**)&entry) == SUCCESS)
! 331: {
! 332: free_package_entry(entry);
! 333: }
! 334: }
! 335:
! 336: /**
! 337: * Described in header.
! 338: */
! 339: pa_tnc_attr_t *ietf_attr_installed_packages_create(void)
! 340: {
! 341: private_ietf_attr_installed_packages_t *this;
! 342:
! 343: INIT(this,
! 344: .public = {
! 345: .pa_tnc_attribute = {
! 346: .get_type = _get_type,
! 347: .get_value = _get_value,
! 348: .get_noskip_flag = _get_noskip_flag,
! 349: .set_noskip_flag = _set_noskip_flag,
! 350: .build = _build,
! 351: .process = _process,
! 352: .add_segment = _add_segment,
! 353: .get_ref = _get_ref,
! 354: .destroy = _destroy,
! 355: },
! 356: .add = _add,
! 357: .create_enumerator = _create_enumerator,
! 358: .get_count = _get_count,
! 359: .clear_packages = _clear_packages,
! 360: },
! 361: .type = { PEN_IETF, IETF_ATTR_INSTALLED_PACKAGES },
! 362: .packages = linked_list_create(),
! 363: .ref = 1,
! 364: );
! 365:
! 366: return &this->public.pa_tnc_attribute;
! 367: }
! 368:
! 369: /**
! 370: * Described in header. .length = length,
! 371:
! 372: */
! 373: pa_tnc_attr_t *ietf_attr_installed_packages_create_from_data(size_t length,
! 374: chunk_t data)
! 375: {
! 376: private_ietf_attr_installed_packages_t *this;
! 377:
! 378: INIT(this,
! 379: .public = {
! 380: .pa_tnc_attribute = {
! 381: .get_type = _get_type,
! 382: .get_value = _get_value,
! 383: .get_noskip_flag = _get_noskip_flag,
! 384: .set_noskip_flag = _set_noskip_flag,
! 385: .build = _build,
! 386: .process = _process,
! 387: .add_segment = _add_segment,
! 388: .get_ref = _get_ref,
! 389: .destroy = _destroy,
! 390: },
! 391: .add = _add,
! 392: .create_enumerator = _create_enumerator,
! 393: .get_count = _get_count,
! 394: .clear_packages = _clear_packages,
! 395: },
! 396: .type = {PEN_IETF, IETF_ATTR_INSTALLED_PACKAGES },
! 397: .length = length,
! 398: .segment = chunk_clone(data),
! 399: .packages = linked_list_create(),
! 400: .ref = 1,
! 401: );
! 402:
! 403: /* received either complete attribute value or first segment */
! 404: this->value = this->segment;
! 405:
! 406: return &this->public.pa_tnc_attribute;
! 407: }
! 408:
! 409:
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