1 /* 2 * lib/route/cls_api.c Classifier Module API 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation version 2.1 7 * of the License. 8 * 9 * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch> 10 */ 11 12 /** 13 * @ingroup cls 14 * @defgroup cls_api Classifier Modules 15 * @{ 16 */ 17 18 #include <netlink-local.h> 19 #include <netlink-tc.h> 20 #include <netlink/netlink.h> 21 #include <netlink/utils.h> 22 #include <netlink/route/tc.h> 23 #include <netlink/route/classifier.h> 24 #include <netlink/route/classifier-modules.h> 25 #include <netlink/route/link.h> 26 27 static struct rtnl_cls_ops *cls_ops_list; 28 29 /** 30 * @name Classifier Module API 31 * @{ 32 */ 33 34 /** 35 * Register a classifier module 36 * @arg cops classifier module operations 37 */ rtnl_cls_register(struct rtnl_cls_ops * cops)38int rtnl_cls_register(struct rtnl_cls_ops *cops) 39 { 40 struct rtnl_cls_ops *o, **op; 41 42 if (!cops->co_kind) 43 BUG(); 44 45 for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next) 46 if (!strcasecmp(cops->co_kind, o->co_kind)) 47 return -NLE_EXIST; 48 49 cops->co_next = NULL; 50 *op = cops; 51 52 return 0; 53 } 54 55 /** 56 * Unregister a classifier module 57 * @arg cops classifier module operations 58 */ rtnl_cls_unregister(struct rtnl_cls_ops * cops)59int rtnl_cls_unregister(struct rtnl_cls_ops *cops) 60 { 61 struct rtnl_cls_ops *o, **op; 62 63 for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next) 64 if (!strcasecmp(cops->co_kind, o->co_kind)) 65 break; 66 67 if (!o) 68 return -NLE_OBJ_NOTFOUND; 69 70 *op = cops->co_next; 71 72 return 0; 73 } 74 __rtnl_cls_lookup_ops(const char * kind)75struct rtnl_cls_ops *__rtnl_cls_lookup_ops(const char *kind) 76 { 77 struct rtnl_cls_ops *cops; 78 79 for (cops = cls_ops_list; cops; cops = cops->co_next) 80 if (!strcmp(kind, cops->co_kind)) 81 return cops; 82 83 return NULL; 84 } 85 86 /** 87 * Lookup classifier operations for a classifier object 88 * @arg cls Classifier object. 89 * 90 * @return Classifier operations or NULL if not found. 91 */ rtnl_cls_lookup_ops(struct rtnl_cls * cls)92struct rtnl_cls_ops *rtnl_cls_lookup_ops(struct rtnl_cls *cls) 93 { 94 if (!cls->c_ops) 95 cls->c_ops = __rtnl_cls_lookup_ops(cls->c_kind); 96 97 return cls->c_ops; 98 } 99 100 101 /** @} */ 102 103 /** @} */ 104