~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/ipv4/xfrm4_state.c

Version: ~ [ linux-5.14-rc3 ] ~ [ linux-5.13.5 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.53 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.135 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.198 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.240 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.276 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.276 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  * xfrm4_state.c
  4  *
  5  * Changes:
  6  *      YOSHIFUJI Hideaki @USAGI
  7  *              Split up af-specific portion
  8  *
  9  */
 10 
 11 #include <net/ip.h>
 12 #include <net/xfrm.h>
 13 #include <linux/pfkeyv2.h>
 14 #include <linux/ipsec.h>
 15 #include <linux/netfilter_ipv4.h>
 16 #include <linux/export.h>
 17 
 18 static int xfrm4_init_flags(struct xfrm_state *x)
 19 {
 20         if (xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc)
 21                 x->props.flags |= XFRM_STATE_NOPMTUDISC;
 22         return 0;
 23 }
 24 
 25 static void
 26 __xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
 27 {
 28         const struct flowi4 *fl4 = &fl->u.ip4;
 29 
 30         sel->daddr.a4 = fl4->daddr;
 31         sel->saddr.a4 = fl4->saddr;
 32         sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
 33         sel->dport_mask = htons(0xffff);
 34         sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
 35         sel->sport_mask = htons(0xffff);
 36         sel->family = AF_INET;
 37         sel->prefixlen_d = 32;
 38         sel->prefixlen_s = 32;
 39         sel->proto = fl4->flowi4_proto;
 40         sel->ifindex = fl4->flowi4_oif;
 41 }
 42 
 43 static void
 44 xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
 45                    const xfrm_address_t *daddr, const xfrm_address_t *saddr)
 46 {
 47         x->id = tmpl->id;
 48         if (x->id.daddr.a4 == 0)
 49                 x->id.daddr.a4 = daddr->a4;
 50         x->props.saddr = tmpl->saddr;
 51         if (x->props.saddr.a4 == 0)
 52                 x->props.saddr.a4 = saddr->a4;
 53         x->props.mode = tmpl->mode;
 54         x->props.reqid = tmpl->reqid;
 55         x->props.family = AF_INET;
 56 }
 57 
 58 int xfrm4_extract_header(struct sk_buff *skb)
 59 {
 60         const struct iphdr *iph = ip_hdr(skb);
 61 
 62         XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
 63         XFRM_MODE_SKB_CB(skb)->id = iph->id;
 64         XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
 65         XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
 66         XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
 67         XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
 68         memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
 69                sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
 70 
 71         return 0;
 72 }
 73 
 74 static struct xfrm_state_afinfo xfrm4_state_afinfo = {
 75         .family                 = AF_INET,
 76         .proto                  = IPPROTO_IPIP,
 77         .eth_proto              = htons(ETH_P_IP),
 78         .owner                  = THIS_MODULE,
 79         .init_flags             = xfrm4_init_flags,
 80         .init_tempsel           = __xfrm4_init_tempsel,
 81         .init_temprop           = xfrm4_init_temprop,
 82         .output                 = xfrm4_output,
 83         .output_finish          = xfrm4_output_finish,
 84         .extract_input          = xfrm4_extract_input,
 85         .extract_output         = xfrm4_extract_output,
 86         .transport_finish       = xfrm4_transport_finish,
 87         .local_error            = xfrm4_local_error,
 88 };
 89 
 90 void __init xfrm4_state_init(void)
 91 {
 92         xfrm_state_register_afinfo(&xfrm4_state_afinfo);
 93 }
 94 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp