cregit-Linux how code gets into the kernel

Release 4.11 net/netfilter/xt_devgroup.c

Directory: net/netfilter
/*
 * Copyright (c) 2011 Patrick McHardy <kaber@trash.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>

#include <linux/netfilter/xt_devgroup.h>
#include <linux/netfilter/x_tables.h>

MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Xtables: Device group match");
MODULE_ALIAS("ipt_devgroup");
MODULE_ALIAS("ip6t_devgroup");


static bool devgroup_mt(const struct sk_buff *skb, struct xt_action_param *par) { const struct xt_devgroup_info *info = par->matchinfo; if (info->flags & XT_DEVGROUP_MATCH_SRC && (((info->src_group ^ xt_in(par)->group) & info->src_mask ? 1 : 0) ^ ((info->flags & XT_DEVGROUP_INVERT_SRC) ? 1 : 0))) return false; if (info->flags & XT_DEVGROUP_MATCH_DST && (((info->dst_group ^ xt_out(par)->group) & info->dst_mask ? 1 : 0) ^ ((info->flags & XT_DEVGROUP_INVERT_DST) ? 1 : 0))) return false; return true; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy12495.38%150.00%
Pablo Neira Ayuso64.62%150.00%
Total130100.00%2100.00%


static int devgroup_mt_checkentry(const struct xt_mtchk_param *par) { const struct xt_devgroup_info *info = par->matchinfo; if (info->flags & ~(XT_DEVGROUP_MATCH_SRC | XT_DEVGROUP_INVERT_SRC | XT_DEVGROUP_MATCH_DST | XT_DEVGROUP_INVERT_DST)) return -EINVAL; if (info->flags & XT_DEVGROUP_MATCH_SRC && par->hook_mask & ~((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD))) return -EINVAL; if (info->flags & XT_DEVGROUP_MATCH_DST && par->hook_mask & ~((1 << NF_INET_FORWARD) | (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_POST_ROUTING))) return -EINVAL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy120100.00%1100.00%
Total120100.00%1100.00%

static struct xt_match devgroup_mt_reg __read_mostly = { .name = "devgroup", .match = devgroup_mt, .checkentry = devgroup_mt_checkentry, .matchsize = sizeof(struct xt_devgroup_info), .family = NFPROTO_UNSPEC, .me = THIS_MODULE };
static int __init devgroup_mt_init(void) { return xt_register_match(&devgroup_mt_reg); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy16100.00%1100.00%
Total16100.00%1100.00%


static void __exit devgroup_mt_exit(void) { xt_unregister_match(&devgroup_mt_reg); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy15100.00%1100.00%
Total15100.00%1100.00%

module_init(devgroup_mt_init); module_exit(devgroup_mt_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy36898.40%150.00%
Pablo Neira Ayuso61.60%150.00%
Total374100.00%2100.00%
Directory: net/netfilter
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