projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * 802_3 | |
| 3 | * | |
| 4 | * Author: | |
| 5 | * Chris Vitale csv@bluetail.com | |
| 6 | * | |
| 7 | * May 2003 | |
| 9d6f229f | 8 | * |
| 1da177e4 | 9 | */ |
| 18219d3f JE |
10 | #include <linux/module.h> |
| 11 | #include <linux/netfilter/x_tables.h> | |
| 1da177e4 LT |
12 | #include <linux/netfilter_bridge/ebtables.h> |
| 13 | #include <linux/netfilter_bridge/ebt_802_3.h> | |
| 1da177e4 | 14 | |
| 2d06d4a5 | 15 | static bool |
| 62fc8051 | 16 | ebt_802_3_mt(const struct sk_buff *skb, struct xt_action_param *par) |
| 1da177e4 | 17 | { |
| f7108a20 | 18 | const struct ebt_802_3_info *info = par->matchinfo; |
| abfdf1c4 | 19 | const struct ebt_802_3_hdr *hdr = ebt_802_3_hdr(skb); |
| 47c183fa | 20 | __be16 type = hdr->llc.ui.ctrl & IS_UI ? hdr->llc.ui.type : hdr->llc.ni.type; |
| 1da177e4 LT |
21 | |
| 22 | if (info->bitmask & EBT_802_3_SAP) { | |
| c37a2dfa | 23 | if (NF_INVF(info, EBT_802_3_SAP, info->sap != hdr->llc.ui.ssap)) |
| 8cc784ee | 24 | return false; |
| c37a2dfa | 25 | if (NF_INVF(info, EBT_802_3_SAP, info->sap != hdr->llc.ui.dsap)) |
| 8cc784ee | 26 | return false; |
| 1da177e4 LT |
27 | } |
| 28 | ||
| 29 | if (info->bitmask & EBT_802_3_TYPE) { | |
| 30 | if (!(hdr->llc.ui.dsap == CHECK_TYPE && hdr->llc.ui.ssap == CHECK_TYPE)) | |
| 8cc784ee | 31 | return false; |
| c37a2dfa | 32 | if (NF_INVF(info, EBT_802_3_TYPE, info->type != type)) |
| 8cc784ee | 33 | return false; |
| 1da177e4 LT |
34 | } |
| 35 | ||
| 8cc784ee | 36 | return true; |
| 1da177e4 LT |
37 | } |
| 38 | ||
| b0f38452 | 39 | static int ebt_802_3_mt_check(const struct xt_mtchk_param *par) |
| 1da177e4 | 40 | { |
| 9b4fce7a | 41 | const struct ebt_802_3_info *info = par->matchinfo; |
| 1da177e4 | 42 | |
| 1da177e4 | 43 | if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK) |
| bd414ee6 | 44 | return -EINVAL; |
| 1da177e4 | 45 | |
| bd414ee6 | 46 | return 0; |
| 1da177e4 LT |
47 | } |
| 48 | ||
| 043ef46c JE |
49 | static struct xt_match ebt_802_3_mt_reg __read_mostly = { |
| 50 | .name = "802_3", | |
| 001a18d3 JE |
51 | .revision = 0, |
| 52 | .family = NFPROTO_BRIDGE, | |
| 2d06d4a5 JE |
53 | .match = ebt_802_3_mt, |
| 54 | .checkentry = ebt_802_3_mt_check, | |
| fc0e3df4 | 55 | .matchsize = sizeof(struct ebt_802_3_info), |
| 1da177e4 LT |
56 | .me = THIS_MODULE, |
| 57 | }; | |
| 58 | ||
| 65b4b4e8 | 59 | static int __init ebt_802_3_init(void) |
| 1da177e4 | 60 | { |
| 043ef46c | 61 | return xt_register_match(&ebt_802_3_mt_reg); |
| 1da177e4 LT |
62 | } |
| 63 | ||
| 65b4b4e8 | 64 | static void __exit ebt_802_3_fini(void) |
| 1da177e4 | 65 | { |
| 043ef46c | 66 | xt_unregister_match(&ebt_802_3_mt_reg); |
| 1da177e4 LT |
67 | } |
| 68 | ||
| 65b4b4e8 AM |
69 | module_init(ebt_802_3_init); |
| 70 | module_exit(ebt_802_3_fini); | |
| f776c4cd | 71 | MODULE_DESCRIPTION("Ebtables: DSAP/SSAP field and SNAP type matching"); |
| 1da177e4 | 72 | MODULE_LICENSE("GPL"); |