cregit-Linux how code gets into the kernel

Release 4.11 net/ipv6/xfrm6_mode_ro.c

Directory: net/ipv6
/*
 * xfrm6_mode_ro.c - Route optimization mode for IPv6.
 *
 * Copyright (C)2003-2006 Helsinki University of Technology
 * Copyright (C)2003-2006 USAGI/WIDE Project
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
/*
 * Authors:
 *      Noriaki TAKAMIYA @USAGI
 *      Masahide NAKAMURA @USAGI
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/stringify.h>
#include <linux/time.h>
#include <net/ipv6.h>
#include <net/xfrm.h>

/* Add route optimization header space.
 *
 * The IP header and mutable extension headers will be moved forward to make
 * space for the route optimization header.
 */

static int xfrm6_ro_output(struct xfrm_state *x, struct sk_buff *skb) { struct ipv6hdr *iph; u8 *prevhdr; int hdr_len; iph = ipv6_hdr(skb); hdr_len = x->type->hdr_offset(x, skb, &prevhdr); skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data); skb_set_network_header(skb, -x->props.header_len); skb->transport_header = skb->network_header + hdr_len; __skb_pull(skb, hdr_len); memmove(ipv6_hdr(skb), iph, hdr_len); x->lastused = get_seconds(); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura6654.55%111.11%
Herbert Xu3730.58%444.44%
Arnaldo Carvalho de Melo1310.74%333.33%
Jamal Hadi Salim54.13%111.11%
Total121100.00%9100.00%

static struct xfrm_mode xfrm6_ro_mode = { .output = xfrm6_ro_output, .owner = THIS_MODULE, .encap = XFRM_MODE_ROUTEOPTIMIZATION, };
static int __init xfrm6_ro_init(void) { return xfrm_register_mode(&xfrm6_ro_mode, AF_INET6); }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura18100.00%1100.00%
Total18100.00%1100.00%


static void __exit xfrm6_ro_exit(void) { int err; err = xfrm_unregister_mode(&xfrm6_ro_mode, AF_INET6); BUG_ON(err); }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura27100.00%1100.00%
Total27100.00%1100.00%

module_init(xfrm6_ro_init); module_exit(xfrm6_ro_exit); MODULE_LICENSE("GPL"); MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_ROUTEOPTIMIZATION);

Overall Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura17773.75%19.09%
Herbert Xu4418.33%545.45%
Arnaldo Carvalho de Melo135.42%327.27%
Jamal Hadi Salim52.08%19.09%
Jeff Kirsher10.42%19.09%
Total240100.00%11100.00%
Directory: net/ipv6
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