cregit-Linux how code gets into the kernel

Release 4.11 net/netfilter/xt_mac.c

Directory: net/netfilter
/* Kernel module to match MAC address parameters. */

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * 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/if_arp.h>
#include <linux/if_ether.h>
#include <linux/etherdevice.h>

#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/xt_mac.h>
#include <linux/netfilter/x_tables.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("Xtables: MAC address match");
MODULE_ALIAS("ipt_mac");
MODULE_ALIAS("ip6t_mac");


static bool mac_mt(const struct sk_buff *skb, struct xt_action_param *par) { const struct xt_mac_info *info = par->matchinfo; bool ret; if (skb->dev == NULL || skb->dev->type != ARPHRD_ETHER) return false; if (skb_mac_header(skb) < skb->head) return false; if (skb_mac_header(skb) + ETH_HLEN > skb->data) return false; ret = ether_addr_equal(eth_hdr(skb)->h_source, info->srcaddr); ret ^= info->invert; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Engelhardt5048.08%646.15%
Linus Torvalds (pre-git)4038.46%17.69%
Arnaldo Carvalho de Melo98.65%215.38%
Linus Torvalds21.92%17.69%
Patrick McHardy10.96%17.69%
Joe Perches10.96%17.69%
Harald Welte10.96%17.69%
Total104100.00%13100.00%

static struct xt_match mac_mt_reg __read_mostly = { .name = "mac", .revision = 0, .family = NFPROTO_UNSPEC, .match = mac_mt, .matchsize = sizeof(struct xt_mac_info), .hooks = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD), .me = THIS_MODULE, };
static int __init mac_mt_init(void) { return xt_register_match(&mac_mt_reg); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1062.50%120.00%
Jan Engelhardt425.00%240.00%
Harald Welte16.25%120.00%
Patrick McHardy16.25%120.00%
Total16100.00%5100.00%


static void __exit mac_mt_exit(void) { xt_unregister_match(&mac_mt_reg); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)960.00%125.00%
Jan Engelhardt426.67%250.00%
Harald Welte213.33%125.00%
Total15100.00%4100.00%

module_init(mac_mt_init); module_exit(mac_mt_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8733.21%14.17%
Jan Engelhardt6926.34%833.33%
Harald Welte5019.08%312.50%
Patrick McHardy3714.12%625.00%
Arnaldo Carvalho de Melo93.44%28.33%
Art Haas41.53%14.17%
Kris Katterjohn31.15%14.17%
Linus Torvalds20.76%14.17%
Joe Perches10.38%14.17%
Total262100.00%24100.00%
Directory: net/netfilter
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