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author | Thomas Graf <tgraf@suug.ch> | 2007-09-14 23:28:01 (GMT) |
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committer | Thomas Graf <tgraf@suug.ch> | 2007-09-14 23:28:01 (GMT) |
commit | 44d362409d5469aed47d19e7908d19bd194493a4 (patch) | |
tree | 5d1e739a4566f3af796273e5c3f78ca53d234df6 /lib/route/cls/fw.c | |
download | libnl-44d362409d5469aed47d19e7908d19bd194493a4.zip libnl-44d362409d5469aed47d19e7908d19bd194493a4.tar.gz libnl-44d362409d5469aed47d19e7908d19bd194493a4.tar.bz2 |
Initial import
Diffstat (limited to 'lib/route/cls/fw.c')
-rw-r--r-- | lib/route/cls/fw.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/lib/route/cls/fw.c b/lib/route/cls/fw.c new file mode 100644 index 0000000..7ca7619 --- /dev/null +++ b/lib/route/cls/fw.c @@ -0,0 +1,251 @@ +/* + * lib/route/cls/fw.c fw classifier + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation version 2.1 + * of the License. + * + * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch> + * Copyright (c) 2006 Petr Gotthard <petr.gotthard@siemens.com> + * Copyright (c) 2006 Siemens AG Oesterreich + */ + +/** + * @ingroup cls_api + * @defgroup fw Firewall Classifier + * + * @{ + */ + +#include <netlink-local.h> +#include <netlink-tc.h> +#include <netlink/netlink.h> +#include <netlink/route/classifier.h> +#include <netlink/route/classifier-modules.h> +#include <netlink/route/cls/fw.h> + +/** @cond SKIP */ +#define FW_ATTR_CLASSID 0x001 +#define FW_ATTR_ACTION 0x002 +#define FW_ATTR_POLICE 0x004 +#define FW_ATTR_INDEV 0x008 +/** @endcond */ + +static inline struct rtnl_fw *fw_cls(struct rtnl_cls *cls) +{ + return (struct rtnl_fw *) cls->c_subdata; +} + +static inline struct rtnl_fw *fw_alloc(struct rtnl_cls *cls) +{ + if (!cls->c_subdata) + cls->c_subdata = calloc(1, sizeof(struct rtnl_fw)); + + return fw_cls(cls); +} + +static struct nla_policy fw_policy[TCA_FW_MAX+1] = { + [TCA_FW_CLASSID] = { .type = NLA_U32 }, + [TCA_FW_INDEV] = { .type = NLA_STRING, + .maxlen = IFNAMSIZ }, +}; + +static int fw_msg_parser(struct rtnl_cls *cls) +{ + int err; + struct nlattr *tb[TCA_FW_MAX + 1]; + struct rtnl_fw *f; + + err = tca_parse(tb, TCA_FW_MAX, (struct rtnl_tca *) cls, fw_policy); + if (err < 0) + return err; + + f = fw_alloc(cls); + if (!f) + goto errout_nomem; + + if (tb[TCA_FW_CLASSID]) { + f->cf_classid = nla_get_u32(tb[TCA_FW_CLASSID]); + f->cf_mask |= FW_ATTR_CLASSID; + } + + if (tb[TCA_FW_ACT]) { + f->cf_act = nla_get_data(tb[TCA_FW_ACT]); + if (!f->cf_act) + goto errout_nomem; + f->cf_mask |= FW_ATTR_ACTION; + } + + if (tb[TCA_FW_POLICE]) { + f->cf_police = nla_get_data(tb[TCA_FW_POLICE]); + if (!f->cf_police) + goto errout_nomem; + f->cf_mask |= FW_ATTR_POLICE; + } + + if (tb[TCA_FW_INDEV]) { + nla_strlcpy(f->cf_indev, tb[TCA_FW_INDEV], IFNAMSIZ); + f->cf_mask |= FW_ATTR_INDEV; + } + + return 0; + +errout_nomem: + err = nl_errno(ENOMEM); + + return err; +} + +static void fw_free_data(struct rtnl_cls *cls) +{ + struct rtnl_fw *f = fw_cls(cls); + + if (!f) + return; + + nl_data_free(f->cf_act); + nl_data_free(f->cf_police); + + free(cls->c_subdata); +} + +static int fw_clone(struct rtnl_cls *_dst, struct rtnl_cls *_src) +{ + struct rtnl_fw *dst, *src = fw_cls(_src); + + if (!src) + return 0; + + dst = fw_alloc(_dst); + if (!dst) + return nl_errno(ENOMEM); + + if (src->cf_act) + if (!(dst->cf_act = nl_data_clone(src->cf_act))) + goto errout; + + if (src->cf_police) + if (!(dst->cf_police = nl_data_clone(src->cf_police))) + goto errout; + + return 0; +errout: + return nl_get_errno(); +} + +static int fw_dump_brief(struct rtnl_cls *cls, struct nl_dump_params *p, + int line) +{ + struct rtnl_fw *f = fw_cls(cls); + char buf[32]; + + if (!f) + goto ignore; + + if (f->cf_mask & FW_ATTR_CLASSID) + dp_dump(p, " target %s", + rtnl_tc_handle2str(f->cf_classid, buf, sizeof(buf))); + +ignore: + return line; +} + +static int fw_dump_full(struct rtnl_cls *cls, struct nl_dump_params *p, + int line) +{ + struct rtnl_fw *f = fw_cls(cls); + + if (!f) + goto ignore; + + if (f->cf_mask & FW_ATTR_INDEV) + dp_dump(p, "indev %s ", f->cf_indev); + +ignore: + return line; +} + +static int fw_dump_stats(struct rtnl_cls *cls, struct nl_dump_params *p, + int line) +{ + struct rtnl_fw *f = fw_cls(cls); + + if (!f) + goto ignore; + +ignore: + return line; +} + +static struct nl_msg *fw_get_opts(struct rtnl_cls *cls) +{ + struct rtnl_fw *f; + struct nl_msg *msg; + + f = fw_cls(cls); + if (!f) + return NULL; + + msg = nlmsg_alloc(); + if (!msg) + return NULL; + + if (f->cf_mask & FW_ATTR_CLASSID) + nla_put_u32(msg, TCA_FW_CLASSID, f->cf_classid); + + if (f->cf_mask & FW_ATTR_ACTION) + nla_put_data(msg, TCA_FW_ACT, f->cf_act); + + if (f->cf_mask & FW_ATTR_POLICE) + nla_put_data(msg, TCA_FW_POLICE, f->cf_police); + + if (f->cf_mask & FW_ATTR_INDEV) + nla_put_string(msg, TCA_FW_INDEV, f->cf_indev); + + return msg; +} + +/** + * @name Attribute Modifications + * @{ + */ + +int rtnl_fw_set_classid(struct rtnl_cls *cls, uint32_t classid) +{ + struct rtnl_fw *f; + + f = fw_alloc(cls); + if (!f) + return nl_errno(ENOMEM); + + f->cf_classid = classid; + f->cf_mask |= FW_ATTR_CLASSID; + + return 0; +} + +/** @} */ + +static struct rtnl_cls_ops fw_ops = { + .co_kind = "fw", + .co_msg_parser = fw_msg_parser, + .co_free_data = fw_free_data, + .co_clone = fw_clone, + .co_get_opts = fw_get_opts, + .co_dump[NL_DUMP_BRIEF] = fw_dump_brief, + .co_dump[NL_DUMP_FULL] = fw_dump_full, + .co_dump[NL_DUMP_STATS] = fw_dump_stats, +}; + +static void __init fw_init(void) +{ + rtnl_cls_register(&fw_ops); +} + +static void __exit fw_exit(void) +{ + rtnl_cls_unregister(&fw_ops); +} + +/** @} */ |