1 /* 2 * src/cls-utils.c Classifier Helpers 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation version 2 of the License. 7 * 8 * Copyright (c) 2008-2009 Thomas Graf <tgraf (at) suug.ch> 9 */ 10 11 #include "utils.h" 12 13 struct rtnl_cls *nlt_alloc_cls(void) 14 { 15 struct rtnl_cls *cls; 16 17 cls = rtnl_cls_alloc(); 18 if (!cls) 19 fatal(ENOMEM, "Unable to allocate classifier object"); 20 21 return cls; 22 } 23 24 void parse_dev(struct rtnl_cls *cls, struct nl_cache *link_cache, char *arg) 25 { 26 int ival; 27 28 if (!(ival = rtnl_link_name2i(link_cache, arg))) 29 fatal(ENOENT, "Link \"%s\" does not exist", arg); 30 31 rtnl_cls_set_ifindex(cls, ival); 32 } 33 34 void parse_prio(struct rtnl_cls *cls, char *arg) 35 { 36 uint32_t prio = parse_u32(arg); 37 rtnl_cls_set_prio(cls, prio); 38 } 39 40 void parse_parent(struct rtnl_cls *cls, char *arg) 41 { 42 uint32_t parent; 43 int err; 44 45 if ((err = rtnl_tc_str2handle(arg, &parent)) < 0) 46 fatal(err, "Unable to parse handle \"%s\": %s", 47 arg, nl_geterror(err)); 48 49 rtnl_cls_set_parent(cls, parent); 50 } 51 52 void parse_handle(struct rtnl_cls *cls, char *arg) 53 { 54 uint32_t handle; 55 int err; 56 57 if ((err = rtnl_tc_str2handle(arg, &handle)) < 0) 58 fatal(err, "Unable to parse handle \"%s\": %s", 59 arg, nl_geterror(err)); 60 61 rtnl_cls_set_handle(cls, handle); 62 } 63 64 void parse_proto(struct rtnl_cls *cls, char *arg) 65 { 66 int proto = nl_str2ether_proto(arg); 67 if (proto < 0) 68 fatal(proto, "Unable to parse protocol \"%s\": %s", 69 arg, nl_geterror(proto)); 70 rtnl_cls_set_protocol(cls, proto); 71 } 72 73 static NL_LIST_HEAD(cls_modules); 74 75 struct cls_module *lookup_cls_mod(struct rtnl_cls_ops *ops) 76 { 77 struct cls_module *mod; 78 79 nl_list_for_each_entry(mod, &cls_modules, list) { 80 if (mod->ops == ops) 81 return mod; 82 } 83 84 return NULL; 85 } 86 87 void register_cls_module(struct cls_module *mod) 88 { 89 struct rtnl_cls_ops *ops; 90 91 if (!(ops = __rtnl_cls_lookup_ops(mod->name))) 92 fatal(ENOENT, "Could not locate classifier module \"%s\"", 93 mod->name); 94 95 if (lookup_cls_mod(ops) != NULL) 96 fatal(EEXIST, "Duplicate classifier module registration."); 97 98 mod->ops = ops; 99 nl_list_add_tail(&mod->list, &cls_modules); 100 } 101 102 void unregister_cls_module(struct cls_module *mod) 103 { 104 nl_list_del(&mod->list); 105 } 106
