cregit-Linux how code gets into the kernel

Release 4.15 net/ipv6/xfrm6_input.c

Directory: net/ipv6
// SPDX-License-Identifier: GPL-2.0
/*
 * xfrm6_input.c: based on net/ipv4/xfrm4_input.c
 *
 * Authors:
 *      Mitsuru KANDA @USAGI
 *      Kazunori MIYAZAWA @USAGI
 *      Kunihiro Ishiguro <kunihiro@ipinfusion.com>
 *      YOSHIFUJI Hideaki @USAGI
 *              IPv6 support
 */

#include <linux/module.h>
#include <linux/string.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
#include <net/ipv6.h>
#include <net/xfrm.h>


int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb) { return xfrm6_extract_header(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu21100.00%1100.00%
Total21100.00%1100.00%


int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, struct ip6_tnl *t) { XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = t; XFRM_SPI_SKB_CB(skb)->family = AF_INET6; XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr); return xfrm_input(skb, nexthdr, spi, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2841.18%650.00%
Hideaki Yoshifuji / 吉藤英明1927.94%216.67%
Alexey Kodanev1014.71%18.33%
Nicolas Dichtel68.82%18.33%
Patrick McHardy45.88%18.33%
Al Viro11.47%18.33%
Total68100.00%12100.00%

EXPORT_SYMBOL(xfrm6_rcv_spi);
static int xfrm6_transport_finish2(struct net *net, struct sock *sk, struct sk_buff *skb) { if (xfrm_trans_queue(skb, ip6_rcv_finish)) __kfree_skb(skb); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu39100.00%1100.00%
Total39100.00%1100.00%


int xfrm6_transport_finish(struct sk_buff *skb, int async) { struct xfrm_offload *xo = xfrm_offload(skb); int nhlen = skb->data - skb_network_header(skb); skb_network_header(skb)[IP6CB(skb)->nhoff] = XFRM_MODE_SKB_CB(skb)->protocol; #ifndef CONFIG_NETFILTER if (!async) return 1; #endif __skb_push(skb, nhlen); ipv6_hdr(skb)->payload_len = htons(skb->len - sizeof(struct ipv6hdr)); skb_postpush_rcsum(skb, skb_network_header(skb), nhlen); if (xo && (xo->flags & XFRM_GRO)) { skb_mac_header_rebuild(skb); return -1; } NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, dev_net(skb->dev), NULL, skb, skb->dev, NULL, xfrm6_transport_finish2); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4326.88%426.67%
Yossi Kuperman3421.25%213.33%
Steffen Klassert3320.62%16.67%
Patrick McHardy3220.00%213.33%
Eric W. Biedermann74.38%16.67%
Arnaldo Carvalho de Melo53.12%213.33%
Hideaki Yoshifuji / 吉藤英明31.88%16.67%
David S. Miller21.25%16.67%
Jan Engelhardt10.62%16.67%
Total160100.00%15100.00%


int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t) { return xfrm6_rcv_spi(skb, skb_network_header(skb)[IP6CB(skb)->nhoff], 0, t); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2771.05%375.00%
Nicolas Dichtel1128.95%125.00%
Total38100.00%4100.00%

EXPORT_SYMBOL(xfrm6_rcv_tnl);
int xfrm6_rcv(struct sk_buff *skb) { return xfrm6_rcv_tnl(skb, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Nicolas Dichtel1583.33%150.00%
Herbert Xu316.67%150.00%
Total18100.00%2100.00%

EXPORT_SYMBOL(xfrm6_rcv);
int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto) { struct net *net = dev_net(skb->dev); struct xfrm_state *x = NULL; int i = 0; if (secpath_set(skb)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINERROR); goto drop; } if (1 + skb->sp->len == XFRM_MAX_DEPTH) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR); goto drop; } for (i = 0; i < 3; i++) { xfrm_address_t *dst, *src; switch (i) { case 0: dst = daddr; src = saddr; break; case 1: /* lookup state with wild-card source address */ dst = daddr; src = (xfrm_address_t *)&in6addr_any; break; default: /* lookup state with wild-card addresses */ dst = (xfrm_address_t *)&in6addr_any; src = (xfrm_address_t *)&in6addr_any; break; } x = xfrm_state_lookup_byaddr(net, skb->mark, dst, src, proto, AF_INET6); if (!x) continue; spin_lock(&x->lock); if ((!i || (x->props.flags & XFRM_STATE_WILDRECV)) && likely(x->km.state == XFRM_STATE_VALID) && !xfrm_state_check_expire(x)) { spin_unlock(&x->lock); if (x->type->input(x, skb) > 0) { /* found a valid state */ break; } } else spin_unlock(&x->lock); xfrm_state_put(x); x = NULL; } if (!x) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOSTATES); xfrm_audit_state_notfound_simple(skb, AF_INET6); goto drop; } skb->sp->xvec[skb->sp->len++] = x; spin_lock(&x->lock); x->curlft.bytes += skb->len; x->curlft.packets++; spin_unlock(&x->lock); return 1; drop: return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura28779.06%333.33%
Hideaki Yoshifuji / 吉藤英明4412.12%111.11%
Alexey Dobriyan205.51%222.22%
Paul Moore71.93%111.11%
Jamal Hadi Salim41.10%111.11%
Steffen Klassert10.28%111.11%
Total363100.00%9100.00%

EXPORT_SYMBOL(xfrm6_input_addr);

Overall Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura28738.42%37.69%
Herbert Xu16922.62%1128.21%
Hideaki Yoshifuji / 吉藤英明8511.38%410.26%
Patrick McHardy425.62%37.69%
Nicolas Dichtel374.95%12.56%
Yossi Kuperman344.55%25.13%
Steffen Klassert344.55%25.13%
Alexey Dobriyan202.68%25.13%
Alexey Kodanev101.34%12.56%
Paul Moore70.94%12.56%
Eric W. Biedermann70.94%12.56%
Arnaldo Carvalho de Melo50.67%25.13%
Jamal Hadi Salim40.54%12.56%
David S. Miller20.27%12.56%
Jan Engelhardt10.13%12.56%
Ian Morris10.13%12.56%
Al Viro10.13%12.56%
Greg Kroah-Hartman10.13%12.56%
Total747100.00%39100.00%
Directory: net/ipv6
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