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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 | /****************************************************************************** * * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing * parents and siblings and Scope manipulation * $Revision: 92 $ * *****************************************************************************/ /* * Copyright (C) 2000, 2001 R. Byron Moore * * 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. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "acpi.h" #include "acnamesp.h" #include "acinterp.h" #include "amlcode.h" #include "actables.h" #define _COMPONENT ACPI_NAMESPACE MODULE_NAME ("nsutils") /******************************************************************************* * * FUNCTION: Acpi_ns_valid_root_prefix * * PARAMETERS: Prefix - Character to be checked * * RETURN: TRUE if a valid prefix * * DESCRIPTION: Check if a character is a valid ACPI Root prefix * ******************************************************************************/ u8 acpi_ns_valid_root_prefix ( NATIVE_CHAR prefix) { return ((u8) (prefix == '\\')); } /******************************************************************************* * * FUNCTION: Acpi_ns_valid_path_separator * * PARAMETERS: Sep - Character to be checked * * RETURN: TRUE if a valid path separator * * DESCRIPTION: Check if a character is a valid ACPI path separator * ******************************************************************************/ u8 acpi_ns_valid_path_separator ( NATIVE_CHAR sep) { return ((u8) (sep == '.')); } /******************************************************************************* * * FUNCTION: Acpi_ns_get_type * * PARAMETERS: Handle - Parent Node to be examined * * RETURN: Type field from Node whose handle is passed * ******************************************************************************/ acpi_object_type8 acpi_ns_get_type ( acpi_namespace_node *node) { FUNCTION_TRACE ("Ns_get_type"); if (!node) { REPORT_WARNING (("Ns_get_type: Null Node ptr")); return_VALUE (ACPI_TYPE_ANY); } return_VALUE (node->type); } /******************************************************************************* * * FUNCTION: Acpi_ns_local * * PARAMETERS: Type - A namespace object type * * RETURN: LOCAL if names must be found locally in objects of the * passed type, 0 if enclosing scopes should be searched * ******************************************************************************/ u32 acpi_ns_local ( acpi_object_type8 type) { FUNCTION_TRACE ("Ns_local"); if (!acpi_ut_valid_object_type (type)) { /* Type code out of range */ REPORT_WARNING (("Ns_local: Invalid Object Type\n")); return_VALUE (NSP_NORMAL); } return_VALUE ((u32) acpi_gbl_ns_properties[type] & NSP_LOCAL); } /******************************************************************************* * * FUNCTION: Acpi_ns_get_internal_name_length * * PARAMETERS: Info - Info struct initialized with the * external name pointer. * * RETURN: Status * * DESCRIPTION: Calculate the length of the internal (AML) namestring * corresponding to the external (ASL) namestring. * ******************************************************************************/ acpi_status acpi_ns_get_internal_name_length ( acpi_namestring_info *info) { NATIVE_CHAR *next_external_char; u32 i; FUNCTION_ENTRY (); next_external_char = info->external_name; info->num_carats = 0; info->num_segments = 0; info->fully_qualified = FALSE; /* * For the internal name, the required length is 4 bytes * per segment, plus 1 each for Root_prefix, Multi_name_prefix_op, * segment count, trailing null (which is not really needed, * but no there's harm in putting it there) * * strlen() + 1 covers the first Name_seg, which has no * path separator */ if (acpi_ns_valid_root_prefix (next_external_char[0])) { info->fully_qualified = TRUE; next_external_char++; } else { /* * Handle Carat prefixes */ while (*next_external_char == '^') { info->num_carats++; next_external_char++; } } /* * Determine the number of ACPI name "segments" by counting * the number of path separators within the string. Start * with one segment since the segment count is (# separators) * + 1, and zero separators is ok. */ if (*next_external_char) { info->num_segments = 1; for (i = 0; next_external_char[i]; i++) { if (acpi_ns_valid_path_separator (next_external_char[i])) { info->num_segments++; } } } info->length = (ACPI_NAME_SIZE * info->num_segments) + 4 + info->num_carats; info->next_external_char = next_external_char; return (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_ns_build_internal_name * * PARAMETERS: Info - Info struct fully initialized * * RETURN: Status * * DESCRIPTION: Construct the internal (AML) namestring * corresponding to the external (ASL) namestring. * ******************************************************************************/ acpi_status acpi_ns_build_internal_name ( acpi_namestring_info *info) { u32 num_segments = info->num_segments; NATIVE_CHAR *internal_name = info->internal_name; NATIVE_CHAR *external_name = info->next_external_char; NATIVE_CHAR *result = NULL; u32 i; FUNCTION_TRACE ("Ns_build_internal_name"); /* Setup the correct prefixes, counts, and pointers */ if (info->fully_qualified) { internal_name[0] = '\\'; if (num_segments <= 1) { result = &internal_name[1]; } else if (num_segments == 2) { internal_name[1] = AML_DUAL_NAME_PREFIX; result = &internal_name[2]; } else { internal_name[1] = AML_MULTI_NAME_PREFIX_OP; internal_name[2] = (char) num_segments; result = &internal_name[3]; } } else { /* * Not fully qualified. * Handle Carats first, then append the name segments */ i = 0; if (info->num_carats) { for (i = 0; i < info->num_carats; i++) { internal_name[i] = '^'; } } if (num_segments == 1) { result = &internal_name[i]; } else if (num_segments == 2) { internal_name[i] = AML_DUAL_NAME_PREFIX; result = &internal_name[i+1]; } else { internal_name[i] = AML_MULTI_NAME_PREFIX_OP; internal_name[i+1] = (char) num_segments; result = &internal_name[i+2]; } } /* Build the name (minus path separators) */ for (; num_segments; num_segments--) { for (i = 0; i < ACPI_NAME_SIZE; i++) { if (acpi_ns_valid_path_separator (*external_name) || (*external_name == 0)) { /* Pad the segment with underscore(s) if segment is short */ result[i] = '_'; } else { /* Convert the character to uppercase and save it */ result[i] = (char) TOUPPER (*external_name); external_name++; } } /* Now we must have a path separator, or the pathname is bad */ if (!acpi_ns_valid_path_separator (*external_name) && (*external_name != 0)) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Move on the next segment */ external_name++; result += ACPI_NAME_SIZE; } /* Terminate the string */ *result = 0; if (info->fully_qualified) { ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (abs) \"\\%s\"\n", internal_name, &internal_name[0])); } else { ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (rel) \"%s\"\n", internal_name, &internal_name[2])); } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_ns_internalize_name * * PARAMETERS: *External_name - External representation of name * **Converted Name - Where to return the resulting * internal represention of the name * * RETURN: Status * * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) * *******************************************************************************/ acpi_status acpi_ns_internalize_name ( NATIVE_CHAR *external_name, NATIVE_CHAR **converted_name) { NATIVE_CHAR *internal_name; acpi_namestring_info info; acpi_status status; FUNCTION_TRACE ("Ns_internalize_name"); if ((!external_name) || (*external_name == 0) || (!converted_name)) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Get the length of the new internal name */ info.external_name = external_name; acpi_ns_get_internal_name_length (&info); /* We need a segment to store the internal name */ internal_name = ACPI_MEM_CALLOCATE (info.length); if (!internal_name) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Build the name */ info.internal_name = internal_name; status = acpi_ns_build_internal_name (&info); if (ACPI_FAILURE (status)) { ACPI_MEM_FREE (internal_name); return_ACPI_STATUS (status); } *converted_name = internal_name; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_ns_externalize_name * * PARAMETERS: *Internal_name - Internal representation of name * **Converted_name - Where to return the resulting * external representation of name * * RETURN: Status * * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) * to its external form (e.g. "\_PR_.CPU0") * ******************************************************************************/ acpi_status acpi_ns_externalize_name ( u32 internal_name_length, char *internal_name, u32 *converted_name_length, char **converted_name) { u32 prefix_length = 0; u32 names_index = 0; u32 names_count = 0; u32 i = 0; u32 j = 0; FUNCTION_TRACE ("Ns_externalize_name"); if (!internal_name_length || !internal_name || !converted_name_length || !converted_name) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* * Check for a prefix (one '\' | one or more '^'). */ switch (internal_name[0]) { case '\\': prefix_length = 1; break; case '^': for (i = 0; i < internal_name_length; i++) { if (internal_name[i] != '^') { prefix_length = i + 1; } } if (i == internal_name_length) { prefix_length = i; } break; } /* * Check for object names. Note that there could be 0-255 of these * 4-byte elements. */ if (prefix_length < internal_name_length) { switch (internal_name[prefix_length]) { /* <count> 4-byte names */ case AML_MULTI_NAME_PREFIX_OP: names_index = prefix_length + 2; names_count = (u32) internal_name[prefix_length + 1]; break; /* two 4-byte names */ case AML_DUAL_NAME_PREFIX: names_index = prefix_length + 1; names_count = 2; break; /* Null_name */ case 0: names_index = 0; names_count = 0; break; /* one 4-byte name */ default: names_index = prefix_length; names_count = 1; break; } } /* * Calculate the length of Converted_name, which equals the length * of the prefix, length of all object names, length of any required * punctuation ('.') between object names, plus the NULL terminator. */ *converted_name_length = prefix_length + (4 * names_count) + ((names_count > 0) ? (names_count - 1) : 0) + 1; /* * Check to see if we're still in bounds. If not, there's a problem * with Internal_name (invalid format). */ if (*converted_name_length > internal_name_length) { REPORT_ERROR (("Ns_externalize_name: Invalid internal name\n")); return_ACPI_STATUS (AE_BAD_PATHNAME); } /* * Build Converted_name... */ (*converted_name) = ACPI_MEM_CALLOCATE (*converted_name_length); if (!(*converted_name)) { return_ACPI_STATUS (AE_NO_MEMORY); } j = 0; for (i = 0; i < prefix_length; i++) { (*converted_name)[j++] = internal_name[i]; } if (names_count > 0) { for (i = 0; i < names_count; i++) { if (i > 0) { (*converted_name)[j++] = '.'; } (*converted_name)[j++] = internal_name[names_index++]; (*converted_name)[j++] = internal_name[names_index++]; (*converted_name)[j++] = internal_name[names_index++]; (*converted_name)[j++] = internal_name[names_index++]; } } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_ns_map_handle_to_node * * PARAMETERS: Handle - Handle to be converted to an Node * * RETURN: A Name table entry pointer * * DESCRIPTION: Convert a namespace handle to a real Node * ******************************************************************************/ acpi_namespace_node * acpi_ns_map_handle_to_node ( acpi_handle handle) { FUNCTION_ENTRY (); /* * Simple implementation for now; * TBD: [Future] Real integer handles allow for more verification * and keep all pointers within this subsystem! */ if (!handle) { return (NULL); } if (handle == ACPI_ROOT_OBJECT) { return (acpi_gbl_root_node); } /* We can at least attempt to verify the handle */ if (!VALID_DESCRIPTOR_TYPE (handle, ACPI_DESC_TYPE_NAMED)) { return (NULL); } return ((acpi_namespace_node *) handle); } /******************************************************************************* * * FUNCTION: Acpi_ns_convert_entry_to_handle * * PARAMETERS: Node - Node to be converted to a Handle * * RETURN: An USER acpi_handle * * DESCRIPTION: Convert a real Node to a namespace handle * ******************************************************************************/ acpi_handle acpi_ns_convert_entry_to_handle ( acpi_namespace_node *node) { /* * Simple implementation for now; * TBD: [Future] Real integer handles allow for more verification * and keep all pointers within this subsystem! */ return ((acpi_handle) node); /* --------------------------------------------------- if (!Node) { return (NULL); } if (Node == Acpi_gbl_Root_node) { return (ACPI_ROOT_OBJECT); } return ((acpi_handle) Node); ------------------------------------------------------*/ } /******************************************************************************* * * FUNCTION: Acpi_ns_terminate * * PARAMETERS: none * * RETURN: none * * DESCRIPTION: free memory allocated for table storage. * ******************************************************************************/ void acpi_ns_terminate (void) { acpi_operand_object *obj_desc; acpi_namespace_node *this_node; FUNCTION_TRACE ("Ns_terminate"); this_node = acpi_gbl_root_node; /* * 1) Free the entire namespace -- all objects, tables, and stacks * * Delete all objects linked to the root * (additional table descriptors) */ acpi_ns_delete_namespace_subtree (this_node); /* Detach any object(s) attached to the root */ obj_desc = acpi_ns_get_attached_object (this_node); if (obj_desc) { acpi_ns_detach_object (this_node); acpi_ut_remove_reference (obj_desc); } acpi_ns_delete_children (this_node); ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); /* * 2) Now we can delete the ACPI tables */ acpi_tb_delete_acpi_tables (); ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ACPI Tables freed\n")); return_VOID; } /******************************************************************************* * * FUNCTION: Acpi_ns_opens_scope * * PARAMETERS: Type - A valid namespace type * * RETURN: NEWSCOPE if the passed type "opens a name scope" according * to the ACPI specification, else 0 * ******************************************************************************/ u32 acpi_ns_opens_scope ( acpi_object_type8 type) { FUNCTION_TRACE_U32 ("Ns_opens_scope", type); if (!acpi_ut_valid_object_type (type)) { /* type code out of range */ REPORT_WARNING (("Ns_opens_scope: Invalid Object Type\n")); return_VALUE (NSP_NORMAL); } return_VALUE (((u32) acpi_gbl_ns_properties[type]) & NSP_NEWSCOPE); } /******************************************************************************* * * FUNCTION: Acpi_ns_get_node * * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The * \ (backslash) and ^ (carat) prefixes, and the * . (period) to separate segments are supported. * Start_node - Root of subtree to be searched, or NS_ALL for the * root of the name space. If Name is fully * qualified (first s8 is '\'), the passed value * of Scope will not be accessed. * Return_node - Where the Node is returned * * DESCRIPTION: Look up a name relative to a given scope and return the * corresponding Node. NOTE: Scope can be null. * * MUTEX: Locks namespace * ******************************************************************************/ acpi_status acpi_ns_get_node ( NATIVE_CHAR *pathname, acpi_namespace_node *start_node, acpi_namespace_node **return_node) { acpi_generic_state scope_info; acpi_status status; NATIVE_CHAR *internal_path = NULL; FUNCTION_TRACE_PTR ("Ns_get_node", pathname); /* Ensure that the namespace has been initialized */ if (!acpi_gbl_root_node) { return_ACPI_STATUS (AE_NO_NAMESPACE); } if (!pathname) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Convert path to internal representation */ status = acpi_ns_internalize_name (pathname, &internal_path); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); /* Setup lookup scope (search starting point) */ scope_info.scope.node = start_node; /* Lookup the name in the namespace */ status = acpi_ns_lookup (&scope_info, internal_path, ACPI_TYPE_ANY, IMODE_EXECUTE, NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE, NULL, return_node); if (ACPI_FAILURE (status)) { ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s, %s\n", internal_path, acpi_format_exception (status))); } acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); /* Cleanup */ ACPI_MEM_FREE (internal_path); return_ACPI_STATUS (status); } /******************************************************************************* * * FUNCTION: Acpi_ns_find_parent_name * * PARAMETERS: *Child_node - Named Obj whose name is to be found * * RETURN: The ACPI name * * DESCRIPTION: Search for the given obj in its parent scope and return the * name segment, or "????" if the parent name can't be found * (which "should not happen"). * ******************************************************************************/ acpi_name acpi_ns_find_parent_name ( acpi_namespace_node *child_node) { acpi_namespace_node *parent_node; FUNCTION_TRACE ("Ns_find_parent_name"); if (child_node) { /* Valid entry. Get the parent Node */ parent_node = acpi_ns_get_parent_object (child_node); if (parent_node) { ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Parent of %p [%4.4s] is %p [%4.4s]\n", child_node, (char*)&child_node->name, parent_node, (char*)&parent_node->name)); if (parent_node->name) { return_VALUE (parent_node->name); } } ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "unable to find parent of %p (%4.4s)\n", child_node, (char*)&child_node->name)); } return_VALUE (ACPI_UNKNOWN_NAME); } #if defined(ACPI_DEBUG) || defined(ENABLE_DEBUGGER) /******************************************************************************* * * FUNCTION: Acpi_ns_exist_downstream_sibling * * PARAMETERS: *Node - pointer to first Node to examine * * RETURN: TRUE if sibling is found, FALSE otherwise * * DESCRIPTION: Searches remainder of scope being processed to determine * whether there is a downstream sibling to the current * object. This function is used to determine what type of * line drawing character to use when displaying namespace * trees. * ******************************************************************************/ u8 acpi_ns_exist_downstream_sibling ( acpi_namespace_node *node) { if (!node) { return (FALSE); } if (node->name) { return (TRUE); } return (FALSE); } #endif /* ACPI_DEBUG */ /******************************************************************************* * * FUNCTION: Acpi_ns_get_parent_object * * PARAMETERS: Node - Current table entry * * RETURN: Parent entry of the given entry * * DESCRIPTION: Obtain the parent entry for a given entry in the namespace. * ******************************************************************************/ acpi_namespace_node * acpi_ns_get_parent_object ( acpi_namespace_node *node) { FUNCTION_ENTRY (); if (!node) { return (NULL); } /* * Walk to the end of this peer list. * The last entry is marked with a flag and the peer * pointer is really a pointer back to the parent. * This saves putting a parent back pointer in each and * every named object! */ while (!(node->flags & ANOBJ_END_OF_PEER_LIST)) { node = node->peer; } return (node->peer); } /******************************************************************************* * * FUNCTION: Acpi_ns_get_next_valid_node * * PARAMETERS: Node - Current table entry * * RETURN: Next valid Node in the linked node list. NULL if no more valid * nodess * * DESCRIPTION: Find the next valid node within a name table. * Useful for implementing NULL-end-of-list loops. * ******************************************************************************/ acpi_namespace_node * acpi_ns_get_next_valid_node ( acpi_namespace_node *node) { /* If we are at the end of this peer list, return NULL */ if (node->flags & ANOBJ_END_OF_PEER_LIST) { return NULL; } /* Otherwise just return the next peer */ return (node->peer); } |