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net/ipv4/ip_vti.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Linux NET3: IP/IP protocol decoder modified to support * virtual tunnel interface * * Authors: * Saurabh Mohan (saurabh.mohan@vyatta.com) 05/07/2012 |
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*/ /* This version of net/ipv4/ip_vti.c is cloned of net/ipv4/ipip.c For comments look at net/ipv4/ip_gre.c --ANK */ #include <linux/capability.h> #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/uaccess.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/in.h> #include <linux/tcp.h> #include <linux/udp.h> #include <linux/if_arp.h> |
1181412c1 net/ipv4: VTI sup... |
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#include <linux/init.h> #include <linux/netfilter_ipv4.h> #include <linux/if_ether.h> |
78a010cca vti4: Support int... |
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#include <linux/icmpv6.h> |
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#include <net/sock.h> #include <net/ip.h> #include <net/icmp.h> |
c54419321 GRE: Refactor GRE... |
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#include <net/ip_tunnels.h> |
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#include <net/inet_ecn.h> #include <net/xfrm.h> #include <net/net_namespace.h> #include <net/netns/generic.h> |
1181412c1 net/ipv4: VTI sup... |
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static struct rtnl_link_ops vti_link_ops __read_mostly; |
c7d03a00b netns: make struc... |
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static unsigned int vti_net_id __read_mostly; |
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static int vti_tunnel_init(struct net_device *dev); |
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|
df3893c17 vti: Update the i... |
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static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
f981c57ff vti4: eliminated ... |
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int encap_type, bool update_skb_dev) |
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{ struct ip_tunnel *tunnel; const struct iphdr *iph = ip_hdr(skb); |
b9959fd3b vti: switch to ne... |
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struct net *net = dev_net(skb->dev); struct ip_tunnel_net *itn = net_generic(net, vti_net_id); |
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|
b9959fd3b vti: switch to ne... |
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tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, iph->saddr, iph->daddr, 0); |
00db41243 ipv4: coding styl... |
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if (tunnel) { |
df3893c17 vti: Update the i... |
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if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) goto drop; XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel; |
df3893c17 vti: Update the i... |
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|
f981c57ff vti4: eliminated ... |
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if (update_skb_dev) skb->dev = tunnel->dev; |
df3893c17 vti: Update the i... |
63 64 65 66 67 68 69 70 |
return xfrm_input(skb, nexthdr, spi, encap_type); } return -EINVAL; drop: kfree_skb(skb); return 0; } |
f981c57ff vti4: eliminated ... |
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static int vti_input_proto(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) |
dd9ee3444 vti4: Fix a ipip ... |
73 |
{ |
f981c57ff vti4: eliminated ... |
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return vti_input(skb, nexthdr, spi, encap_type, false); |
dd9ee3444 vti4: Fix a ipip ... |
75 |
} |
f981c57ff vti4: eliminated ... |
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static int vti_rcv(struct sk_buff *skb, __be32 spi, bool update_skb_dev) |
df3893c17 vti: Update the i... |
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{ XFRM_SPI_SKB_CB(skb)->family = AF_INET; XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); |
f981c57ff vti4: eliminated ... |
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return vti_input(skb, ip_hdr(skb)->protocol, spi, 0, update_skb_dev); |
df3893c17 vti: Update the i... |
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} |
f981c57ff vti4: eliminated ... |
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static int vti_rcv_proto(struct sk_buff *skb) |
dd9ee3444 vti4: Fix a ipip ... |
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{ |
f981c57ff vti4: eliminated ... |
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return vti_rcv(skb, 0, false); } |
dd9ee3444 vti4: Fix a ipip ... |
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|
df3893c17 vti: Update the i... |
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static int vti_rcv_cb(struct sk_buff *skb, int err) { unsigned short family; struct net_device *dev; |
df3893c17 vti: Update the i... |
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struct xfrm_state *x; |
4c145dce2 xfrm: make xfrm m... |
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const struct xfrm_mode *inner_mode; |
df3893c17 vti: Update the i... |
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struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4; |
d55c670cb ip_vti/ip6_vti: P... |
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u32 orig_mark = skb->mark; int ret; |
df3893c17 vti: Update the i... |
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if (!tunnel) |
1181412c1 net/ipv4: VTI sup... |
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return 1; |
df3893c17 vti: Update the i... |
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dev = tunnel->dev; if (err) { dev->stats.rx_errors++; dev->stats.rx_dropped++; return 0; |
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} |
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|
df3893c17 vti: Update the i... |
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x = xfrm_input_state(skb); |
1fb81e09d vti: use right in... |
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|
c9500d7b7 xfrm: store xfrm_... |
111 |
inner_mode = &x->inner_mode; |
1fb81e09d vti: use right in... |
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if (x->sel.family == AF_UNSPEC) { inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol); if (inner_mode == NULL) { XFRM_INC_STATS(dev_net(skb->dev), LINUX_MIB_XFRMINSTATEMODEERROR); return -EINVAL; } } |
b45714b16 xfrm: prefer fami... |
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family = inner_mode->family; |
df3893c17 vti: Update the i... |
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|
d55c670cb ip_vti/ip6_vti: P... |
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skb->mark = be32_to_cpu(tunnel->parms.i_key); ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family); skb->mark = orig_mark; if (!ret) |
df3893c17 vti: Update the i... |
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return -EPERM; skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(skb->dev))); skb->dev = dev; |
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dev_sw_netstats_rx_add(dev, skb->len); |
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return 0; |
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} |
6e2de802a vti4: Check the t... |
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static bool vti_state_check(const struct xfrm_state *x, __be32 dst, __be32 src) { xfrm_address_t *daddr = (xfrm_address_t *)&dst; xfrm_address_t *saddr = (xfrm_address_t *)&src; /* if there is no transform then this tunnel is not functional. * Or if the xfrm is not mode tunnel. */ if (!x || x->props.mode != XFRM_MODE_TUNNEL || x->props.family != AF_INET) return false; if (!dst) return xfrm_addr_equal(saddr, &x->props.saddr, AF_INET); if (!xfrm_state_addr_check(x, daddr, saddr, AF_INET)) return false; return true; } |
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static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev, struct flowi *fl) |
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{ struct ip_tunnel *tunnel = netdev_priv(dev); |
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struct ip_tunnel_parm *parms = &tunnel->parms; |
a34cd4f31 vti4: Use the on ... |
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struct dst_entry *dst = skb_dst(skb); |
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struct net_device *tdev; /* Device to other host */ |
36f6ee22d vti: fix use afte... |
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int pkt_len = skb->len; |
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int err; |
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int mtu; |
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|
a34cd4f31 vti4: Use the on ... |
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if (!dst) { |
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switch (skb->protocol) { case htons(ETH_P_IP): { struct rtable *rt; fl->u.ip4.flowi4_oif = dev->ifindex; fl->u.ip4.flowi4_flags |= FLOWI_FLAG_ANYSRC; rt = __ip_route_output_key(dev_net(dev), &fl->u.ip4); if (IS_ERR(rt)) { dev->stats.tx_carrier_errors++; goto tx_error_icmp; } dst = &rt->dst; skb_dst_set(skb, dst); break; } #if IS_ENABLED(CONFIG_IPV6) case htons(ETH_P_IPV6): fl->u.ip6.flowi6_oif = dev->ifindex; fl->u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC; dst = ip6_route_output(dev_net(dev), NULL, &fl->u.ip6); if (dst->error) { dst_release(dst); dst = NULL; dev->stats.tx_carrier_errors++; goto tx_error_icmp; } skb_dst_set(skb, dst); break; #endif default: |
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dev->stats.tx_carrier_errors++; goto tx_error_icmp; } |
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} |
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|
a34cd4f31 vti4: Use the on ... |
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dst_hold(dst); |
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dst = xfrm_lookup_route(tunnel->net, dst, fl, NULL, 0); |
a34cd4f31 vti4: Use the on ... |
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if (IS_ERR(dst)) { |
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dev->stats.tx_carrier_errors++; goto tx_error_icmp; } |
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|
b328ecc46 xfrm: Make the po... |
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if (dst->flags & DST_XFRM_QUEUE) goto queued; |
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if (!vti_state_check(dst->xfrm, parms->iph.daddr, parms->iph.saddr)) { |
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dev->stats.tx_carrier_errors++; |
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dst_release(dst); |
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goto tx_error_icmp; } |
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|
a34cd4f31 vti4: Use the on ... |
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tdev = dst->dev; |
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if (tdev == dev) { |
a34cd4f31 vti4: Use the on ... |
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dst_release(dst); |
1181412c1 net/ipv4: VTI sup... |
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dev->stats.collisions++; goto tx_error; } |
d6af1a31c vti: Add pmtu han... |
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mtu = dst_mtu(dst); if (skb->len > mtu) { |
8247a79ef vti: do not confi... |
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skb_dst_update_pmtu_no_confirm(skb, mtu); |
d6af1a31c vti: Add pmtu han... |
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if (skb->protocol == htons(ETH_P_IP)) { icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); } else { if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); } dst_release(dst); goto tx_error; } |
b328ecc46 xfrm: Make the po... |
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queued: |
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skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev))); |
a34cd4f31 vti4: Use the on ... |
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skb_dst_set(skb, dst); |
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skb->dev = skb_dst(skb)->dev; |
13206b6bf net: Pass net int... |
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err = dst_output(tunnel->net, skb->sk, skb); |
b9959fd3b vti: switch to ne... |
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if (net_xmit_eval(err) == 0) |
36f6ee22d vti: fix use afte... |
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err = pkt_len; |
039f50629 ip_tunnel: Move s... |
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iptunnel_xmit_stats(dev, err); |
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return NETDEV_TX_OK; tx_error_icmp: dst_link_failure(skb); tx_error: dev->stats.tx_errors++; |
3acfa1e73 ipv4: be friend w... |
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kfree_skb(skb); |
1181412c1 net/ipv4: VTI sup... |
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return NETDEV_TX_OK; } |
78a010cca vti4: Support int... |
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/* This function assumes it is being called from dev_queue_xmit() * and that skb is filled properly by that function. */ static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) { struct ip_tunnel *tunnel = netdev_priv(dev); struct flowi fl; |
cb9f1b783 ip: validate head... |
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if (!pskb_inet_may_pull(skb)) goto tx_err; |
78a010cca vti4: Support int... |
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memset(&fl, 0, sizeof(fl)); |
78a010cca vti4: Support int... |
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switch (skb->protocol) { case htons(ETH_P_IP): xfrm_decode_session(skb, &fl, AF_INET); memset(IPCB(skb), 0, sizeof(*IPCB(skb))); break; case htons(ETH_P_IPV6): xfrm_decode_session(skb, &fl, AF_INET6); memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); break; default: |
cb9f1b783 ip: validate head... |
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goto tx_err; |
78a010cca vti4: Support int... |
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} |
cd5279c19 ip_vti/ip6_vti: D... |
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/* override mark with tunnel output key */ fl.flowi_mark = be32_to_cpu(tunnel->parms.o_key); |
78a010cca vti4: Support int... |
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return vti_xmit(skb, dev, &fl); |
cb9f1b783 ip: validate head... |
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tx_err: dev->stats.tx_errors++; kfree_skb(skb); return NETDEV_TX_OK; |
78a010cca vti4: Support int... |
288 |
} |
df3893c17 vti: Update the i... |
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static int vti4_err(struct sk_buff *skb, u32 info) { __be32 spi; |
6d004d6cc vti: Use the tunn... |
292 |
__u32 mark; |
df3893c17 vti: Update the i... |
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struct xfrm_state *x; struct ip_tunnel *tunnel; struct ip_esp_hdr *esph; struct ip_auth_hdr *ah ; struct ip_comp_hdr *ipch; struct net *net = dev_net(skb->dev); const struct iphdr *iph = (const struct iphdr *)skb->data; int protocol = iph->protocol; struct ip_tunnel_net *itn = net_generic(net, vti_net_id); tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, iph->daddr, iph->saddr, 0); if (!tunnel) return -1; |
6d004d6cc vti: Use the tunn... |
307 |
mark = be32_to_cpu(tunnel->parms.o_key); |
df3893c17 vti: Update the i... |
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switch (protocol) { case IPPROTO_ESP: esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2)); spi = esph->spi; break; case IPPROTO_AH: ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2)); spi = ah->spi; break; case IPPROTO_COMP: ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2)); spi = htonl(ntohs(ipch->cpi)); break; default: return 0; } switch (icmp_hdr(skb)->type) { case ICMP_DEST_UNREACH: if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) return 0; case ICMP_REDIRECT: break; default: return 0; } |
6d004d6cc vti: Use the tunn... |
334 |
x = xfrm_state_lookup(net, mark, (const xfrm_address_t *)&iph->daddr, |
df3893c17 vti: Update the i... |
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spi, protocol, AF_INET); if (!x) return 0; if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) |
d888f3966 net-ipv4: remove ... |
340 |
ipv4_update_pmtu(skb, net, info, 0, protocol); |
df3893c17 vti: Update the i... |
341 |
else |
1042caa79 net-ipv4: remove ... |
342 |
ipv4_redirect(skb, net, 0, protocol); |
df3893c17 vti: Update the i... |
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xfrm_state_put(x); return 0; } |
1181412c1 net/ipv4: VTI sup... |
347 |
static int |
607259a69 net: add a new nd... |
348 |
vti_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd) |
1181412c1 net/ipv4: VTI sup... |
349 350 |
{ int err = 0; |
1181412c1 net/ipv4: VTI sup... |
351 |
|
b9959fd3b vti: switch to ne... |
352 |
if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
607259a69 net: add a new nd... |
353 354 |
if (p->iph.version != 4 || p->iph.protocol != IPPROTO_IPIP || p->iph.ihl != 5) |
b9959fd3b vti: switch to ne... |
355 356 |
return -EINVAL; } |
1181412c1 net/ipv4: VTI sup... |
357 |
|
607259a69 net: add a new nd... |
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if (!(p->i_flags & GRE_KEY)) p->i_key = 0; if (!(p->o_flags & GRE_KEY)) p->o_key = 0; |
7c8e6b9c2 ip_vti: Fix 'ip t... |
362 |
|
607259a69 net: add a new nd... |
363 |
p->i_flags = VTI_ISVTI; |
7c8e6b9c2 ip_vti: Fix 'ip t... |
364 |
|
607259a69 net: add a new nd... |
365 |
err = ip_tunnel_ctl(dev, p, cmd); |
b9959fd3b vti: switch to ne... |
366 367 |
if (err) return err; |
1181412c1 net/ipv4: VTI sup... |
368 |
|
b9959fd3b vti: switch to ne... |
369 |
if (cmd != SIOCDELTUNNEL) { |
607259a69 net: add a new nd... |
370 371 |
p->i_flags |= GRE_KEY; p->o_flags |= GRE_KEY; |
1181412c1 net/ipv4: VTI sup... |
372 |
} |
1181412c1 net/ipv4: VTI sup... |
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return 0; } static const struct net_device_ops vti_netdev_ops = { .ndo_init = vti_tunnel_init, |
b9959fd3b vti: switch to ne... |
378 |
.ndo_uninit = ip_tunnel_uninit, |
1181412c1 net/ipv4: VTI sup... |
379 |
.ndo_start_xmit = vti_tunnel_xmit, |
607259a69 net: add a new nd... |
380 |
.ndo_do_ioctl = ip_tunnel_ioctl, |
b9959fd3b vti: switch to ne... |
381 |
.ndo_change_mtu = ip_tunnel_change_mtu, |
f61dd388a Tunneling: use IP... |
382 |
.ndo_get_stats64 = ip_tunnel_get_stats64, |
1e99584b9 ipip,gre,vti,sit:... |
383 |
.ndo_get_iflink = ip_tunnel_get_iflink, |
607259a69 net: add a new nd... |
384 |
.ndo_tunnel_ctl = vti_tunnel_ctl, |
1181412c1 net/ipv4: VTI sup... |
385 |
}; |
b9959fd3b vti: switch to ne... |
386 |
static void vti_tunnel_setup(struct net_device *dev) |
1181412c1 net/ipv4: VTI sup... |
387 |
{ |
b9959fd3b vti: switch to ne... |
388 |
dev->netdev_ops = &vti_netdev_ops; |
ab59d2b69 net: vti: impleme... |
389 |
dev->header_ops = &ip_tunnel_header_ops; |
8d89dcdf8 vti: don't allow ... |
390 |
dev->type = ARPHRD_TUNNEL; |
b9959fd3b vti: switch to ne... |
391 |
ip_tunnel_setup(dev, vti_net_id); |
1181412c1 net/ipv4: VTI sup... |
392 |
} |
b9959fd3b vti: switch to ne... |
393 |
static int vti_tunnel_init(struct net_device *dev) |
1181412c1 net/ipv4: VTI sup... |
394 |
{ |
b9959fd3b vti: switch to ne... |
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struct ip_tunnel *tunnel = netdev_priv(dev); struct iphdr *iph = &tunnel->parms.iph; memcpy(dev->dev_addr, &iph->saddr, 4); memcpy(dev->broadcast, &iph->daddr, 4); |
1181412c1 net/ipv4: VTI sup... |
400 |
|
1181412c1 net/ipv4: VTI sup... |
401 |
dev->flags = IFF_NOARP; |
1181412c1 net/ipv4: VTI sup... |
402 |
dev->addr_len = 4; |
1181412c1 net/ipv4: VTI sup... |
403 |
dev->features |= NETIF_F_LLTX; |
028758788 net: better IFF_X... |
404 |
netif_keep_dst(dev); |
1181412c1 net/ipv4: VTI sup... |
405 |
|
b9959fd3b vti: switch to ne... |
406 |
return ip_tunnel_init(dev); |
1181412c1 net/ipv4: VTI sup... |
407 |
} |
b9959fd3b vti: switch to ne... |
408 |
static void __net_init vti_fb_tunnel_init(struct net_device *dev) |
1181412c1 net/ipv4: VTI sup... |
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{ struct ip_tunnel *tunnel = netdev_priv(dev); struct iphdr *iph = &tunnel->parms.iph; |
1181412c1 net/ipv4: VTI sup... |
412 |
|
1181412c1 net/ipv4: VTI sup... |
413 414 415 |
iph->version = 4; iph->protocol = IPPROTO_IPIP; iph->ihl = 5; |
1181412c1 net/ipv4: VTI sup... |
416 |
} |
df3893c17 vti: Update the i... |
417 |
static struct xfrm4_protocol vti_esp4_protocol __read_mostly = { |
f981c57ff vti4: eliminated ... |
418 419 |
.handler = vti_rcv_proto, .input_handler = vti_input_proto, |
df3893c17 vti: Update the i... |
420 421 422 423 424 425 |
.cb_handler = vti_rcv_cb, .err_handler = vti4_err, .priority = 100, }; static struct xfrm4_protocol vti_ah4_protocol __read_mostly = { |
f981c57ff vti4: eliminated ... |
426 427 |
.handler = vti_rcv_proto, .input_handler = vti_input_proto, |
df3893c17 vti: Update the i... |
428 429 430 431 432 433 |
.cb_handler = vti_rcv_cb, .err_handler = vti4_err, .priority = 100, }; static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = { |
f981c57ff vti4: eliminated ... |
434 435 |
.handler = vti_rcv_proto, .input_handler = vti_input_proto, |
df3893c17 vti: Update the i... |
436 437 438 |
.cb_handler = vti_rcv_cb, .err_handler = vti4_err, .priority = 100, |
1181412c1 net/ipv4: VTI sup... |
439 |
}; |
87e66b968 ip_vti: support I... |
440 441 442 443 444 445 446 447 448 449 |
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL) static int vti_rcv_tunnel(struct sk_buff *skb) { XFRM_SPI_SKB_CB(skb)->family = AF_INET; XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); return vti_input(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr, 0, false); } static struct xfrm_tunnel vti_ipip_handler __read_mostly = { |
f981c57ff vti4: eliminated ... |
450 |
.handler = vti_rcv_tunnel, |
87e66b968 ip_vti: support I... |
451 |
.cb_handler = vti_rcv_cb, |
dd9ee3444 vti4: Fix a ipip ... |
452 453 454 |
.err_handler = vti4_err, .priority = 0, }; |
55a48c7ec ip_vti: not regis... |
455 |
|
61ee4137b ip_vti: Fix unuse... |
456 |
#if IS_ENABLED(CONFIG_IPV6) |
55a48c7ec ip_vti: not regis... |
457 |
static struct xfrm_tunnel vti_ipip6_handler __read_mostly = { |
f981c57ff vti4: eliminated ... |
458 |
.handler = vti_rcv_tunnel, |
55a48c7ec ip_vti: not regis... |
459 |
.cb_handler = vti_rcv_cb, |
dd9ee3444 vti4: Fix a ipip ... |
460 461 462 |
.err_handler = vti4_err, .priority = 0, }; |
87e66b968 ip_vti: support I... |
463 |
#endif |
61ee4137b ip_vti: Fix unuse... |
464 |
#endif |
dd9ee3444 vti4: Fix a ipip ... |
465 |
|
1181412c1 net/ipv4: VTI sup... |
466 467 468 |
static int __net_init vti_init_net(struct net *net) { int err; |
b9959fd3b vti: switch to ne... |
469 |
struct ip_tunnel_net *itn; |
1181412c1 net/ipv4: VTI sup... |
470 |
|
b9959fd3b vti: switch to ne... |
471 |
err = ip_tunnel_init_net(net, vti_net_id, &vti_link_ops, "ip_vti0"); |
1181412c1 net/ipv4: VTI sup... |
472 |
if (err) |
b9959fd3b vti: switch to ne... |
473 474 |
return err; itn = net_generic(net, vti_net_id); |
cd1aa9c2c ip_vti: fix a nul... |
475 476 |
if (itn->fb_tunnel_dev) vti_fb_tunnel_init(itn->fb_tunnel_dev); |
1181412c1 net/ipv4: VTI sup... |
477 |
return 0; |
1181412c1 net/ipv4: VTI sup... |
478 |
} |
64bc17811 ipv4: speedup ipv... |
479 |
static void __net_exit vti_exit_batch_net(struct list_head *list_net) |
1181412c1 net/ipv4: VTI sup... |
480 |
{ |
64bc17811 ipv4: speedup ipv... |
481 |
ip_tunnel_delete_nets(list_net, vti_net_id, &vti_link_ops); |
1181412c1 net/ipv4: VTI sup... |
482 483 484 485 |
} static struct pernet_operations vti_net_ops = { .init = vti_init_net, |
64bc17811 ipv4: speedup ipv... |
486 |
.exit_batch = vti_exit_batch_net, |
1181412c1 net/ipv4: VTI sup... |
487 |
.id = &vti_net_id, |
b9959fd3b vti: switch to ne... |
488 |
.size = sizeof(struct ip_tunnel_net), |
1181412c1 net/ipv4: VTI sup... |
489 |
}; |
a8b8a889e net: add netlink_... |
490 491 |
static int vti_tunnel_validate(struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) |
1181412c1 net/ipv4: VTI sup... |
492 493 494 495 496 |
{ return 0; } static void vti_netlink_parms(struct nlattr *data[], |
9830ad4c6 ip_tunnel: Allow ... |
497 498 |
struct ip_tunnel_parm *parms, __u32 *fwmark) |
1181412c1 net/ipv4: VTI sup... |
499 500 501 502 503 504 505 |
{ memset(parms, 0, sizeof(*parms)); parms->iph.protocol = IPPROTO_IPIP; if (!data) return; |
df3893c17 vti: Update the i... |
506 |
parms->i_flags = VTI_ISVTI; |
1181412c1 net/ipv4: VTI sup... |
507 508 509 510 511 512 513 514 515 516 |
if (data[IFLA_VTI_LINK]) parms->link = nla_get_u32(data[IFLA_VTI_LINK]); if (data[IFLA_VTI_IKEY]) parms->i_key = nla_get_be32(data[IFLA_VTI_IKEY]); if (data[IFLA_VTI_OKEY]) parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]); if (data[IFLA_VTI_LOCAL]) |
67b61f6c1 netlink: implemen... |
517 |
parms->iph.saddr = nla_get_in_addr(data[IFLA_VTI_LOCAL]); |
1181412c1 net/ipv4: VTI sup... |
518 519 |
if (data[IFLA_VTI_REMOTE]) |
67b61f6c1 netlink: implemen... |
520 |
parms->iph.daddr = nla_get_in_addr(data[IFLA_VTI_REMOTE]); |
1181412c1 net/ipv4: VTI sup... |
521 |
|
9830ad4c6 ip_tunnel: Allow ... |
522 523 |
if (data[IFLA_VTI_FWMARK]) *fwmark = nla_get_u32(data[IFLA_VTI_FWMARK]); |
1181412c1 net/ipv4: VTI sup... |
524 525 526 |
} static int vti_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a185 net: add netlink_... |
527 528 |
struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) |
1181412c1 net/ipv4: VTI sup... |
529 |
{ |
b9959fd3b vti: switch to ne... |
530 |
struct ip_tunnel_parm parms; |
9830ad4c6 ip_tunnel: Allow ... |
531 |
__u32 fwmark = 0; |
1181412c1 net/ipv4: VTI sup... |
532 |
|
9830ad4c6 ip_tunnel: Allow ... |
533 534 |
vti_netlink_parms(data, &parms, &fwmark); return ip_tunnel_newlink(dev, tb, &parms, fwmark); |
1181412c1 net/ipv4: VTI sup... |
535 536 537 |
} static int vti_changelink(struct net_device *dev, struct nlattr *tb[], |
ad744b223 net: add netlink_... |
538 539 |
struct nlattr *data[], struct netlink_ext_ack *extack) |
1181412c1 net/ipv4: VTI sup... |
540 |
{ |
9830ad4c6 ip_tunnel: Allow ... |
541 542 |
struct ip_tunnel *t = netdev_priv(dev); __u32 fwmark = t->fwmark; |
1181412c1 net/ipv4: VTI sup... |
543 |
struct ip_tunnel_parm p; |
1181412c1 net/ipv4: VTI sup... |
544 |
|
9830ad4c6 ip_tunnel: Allow ... |
545 546 |
vti_netlink_parms(data, &p, &fwmark); return ip_tunnel_changelink(dev, tb, &p, fwmark); |
1181412c1 net/ipv4: VTI sup... |
547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 |
} static size_t vti_get_size(const struct net_device *dev) { return /* IFLA_VTI_LINK */ nla_total_size(4) + /* IFLA_VTI_IKEY */ nla_total_size(4) + /* IFLA_VTI_OKEY */ nla_total_size(4) + /* IFLA_VTI_LOCAL */ nla_total_size(4) + /* IFLA_VTI_REMOTE */ nla_total_size(4) + |
9830ad4c6 ip_tunnel: Allow ... |
562 563 |
/* IFLA_VTI_FWMARK */ nla_total_size(4) + |
1181412c1 net/ipv4: VTI sup... |
564 565 566 567 568 569 570 |
0; } static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct ip_tunnel *t = netdev_priv(dev); struct ip_tunnel_parm *p = &t->parms; |
8ed508fd4 vti: check nla_pu... |
571 572 573 574 575 576 577 |
if (nla_put_u32(skb, IFLA_VTI_LINK, p->link) || nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key) || nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key) || nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr) || nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr) || nla_put_u32(skb, IFLA_VTI_FWMARK, t->fwmark)) return -EMSGSIZE; |
1181412c1 net/ipv4: VTI sup... |
578 579 580 581 582 583 584 585 |
return 0; } static const struct nla_policy vti_policy[IFLA_VTI_MAX + 1] = { [IFLA_VTI_LINK] = { .type = NLA_U32 }, [IFLA_VTI_IKEY] = { .type = NLA_U32 }, [IFLA_VTI_OKEY] = { .type = NLA_U32 }, |
c593642c8 treewide: Use siz... |
586 587 |
[IFLA_VTI_LOCAL] = { .len = sizeof_field(struct iphdr, saddr) }, [IFLA_VTI_REMOTE] = { .len = sizeof_field(struct iphdr, daddr) }, |
9830ad4c6 ip_tunnel: Allow ... |
588 |
[IFLA_VTI_FWMARK] = { .type = NLA_U32 }, |
1181412c1 net/ipv4: VTI sup... |
589 590 591 592 593 594 595 596 597 598 599 |
}; static struct rtnl_link_ops vti_link_ops __read_mostly = { .kind = "vti", .maxtype = IFLA_VTI_MAX, .policy = vti_policy, .priv_size = sizeof(struct ip_tunnel), .setup = vti_tunnel_setup, .validate = vti_tunnel_validate, .newlink = vti_newlink, .changelink = vti_changelink, |
20ea60ca9 ip_tunnel: the la... |
600 |
.dellink = ip_tunnel_dellink, |
1181412c1 net/ipv4: VTI sup... |
601 602 |
.get_size = vti_get_size, .fill_info = vti_fill_info, |
1728d4fab tunnels: advertis... |
603 |
.get_link_net = ip_tunnel_get_link_net, |
1181412c1 net/ipv4: VTI sup... |
604 605 606 607 |
}; static int __init vti_init(void) { |
1990e4f88 vti: Simplify err... |
608 |
const char *msg; |
1181412c1 net/ipv4: VTI sup... |
609 |
int err; |
1990e4f88 vti: Simplify err... |
610 611 |
pr_info("IPv4 over IPsec tunneling driver "); |
1181412c1 net/ipv4: VTI sup... |
612 |
|
1990e4f88 vti: Simplify err... |
613 |
msg = "tunnel device"; |
1181412c1 net/ipv4: VTI sup... |
614 615 |
err = register_pernet_device(&vti_net_ops); if (err < 0) |
1990e4f88 vti: Simplify err... |
616 |
goto pernet_dev_failed; |
df3893c17 vti: Update the i... |
617 |
|
1990e4f88 vti: Simplify err... |
618 619 620 621 |
msg = "tunnel protocols"; err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP); if (err < 0) goto xfrm_proto_esp_failed; |
df3893c17 vti: Update the i... |
622 |
err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f88 vti: Simplify err... |
623 624 |
if (err < 0) goto xfrm_proto_ah_failed; |
df3893c17 vti: Update the i... |
625 |
err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f88 vti: Simplify err... |
626 627 |
if (err < 0) goto xfrm_proto_comp_failed; |
1181412c1 net/ipv4: VTI sup... |
628 |
|
87e66b968 ip_vti: support I... |
629 |
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL) |
dd9ee3444 vti4: Fix a ipip ... |
630 |
msg = "ipip tunnel"; |
87e66b968 ip_vti: support I... |
631 |
err = xfrm4_tunnel_register(&vti_ipip_handler, AF_INET); |
01ce31c57 vti4: removed dup... |
632 |
if (err < 0) |
e6ce64570 ip_vti: support I... |
633 634 |
goto xfrm_tunnel_ipip_failed; #if IS_ENABLED(CONFIG_IPV6) |
55a48c7ec ip_vti: not regis... |
635 |
err = xfrm4_tunnel_register(&vti_ipip6_handler, AF_INET6); |
01ce31c57 vti4: removed dup... |
636 |
if (err < 0) |
e6ce64570 ip_vti: support I... |
637 638 |
goto xfrm_tunnel_ipip6_failed; #endif |
87e66b968 ip_vti: support I... |
639 |
#endif |
dd9ee3444 vti4: Fix a ipip ... |
640 |
|
1990e4f88 vti: Simplify err... |
641 |
msg = "netlink interface"; |
1181412c1 net/ipv4: VTI sup... |
642 643 644 645 646 647 648 |
err = rtnl_link_register(&vti_link_ops); if (err < 0) goto rtnl_link_failed; return err; rtnl_link_failed: |
87e66b968 ip_vti: support I... |
649 |
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL) |
e6ce64570 ip_vti: support I... |
650 |
#if IS_ENABLED(CONFIG_IPV6) |
55a48c7ec ip_vti: not regis... |
651 |
xfrm4_tunnel_deregister(&vti_ipip6_handler, AF_INET6); |
e6ce64570 ip_vti: support I... |
652 653 |
xfrm_tunnel_ipip6_failed: #endif |
87e66b968 ip_vti: support I... |
654 |
xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET); |
e6ce64570 ip_vti: support I... |
655 |
xfrm_tunnel_ipip_failed: |
87e66b968 ip_vti: support I... |
656 |
#endif |
5483844c3 vti4: ipip tunnel... |
657 |
xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f88 vti: Simplify err... |
658 |
xfrm_proto_comp_failed: |
df3893c17 vti: Update the i... |
659 |
xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f88 vti: Simplify err... |
660 |
xfrm_proto_ah_failed: |
df3893c17 vti: Update the i... |
661 |
xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
1990e4f88 vti: Simplify err... |
662 |
xfrm_proto_esp_failed: |
1181412c1 net/ipv4: VTI sup... |
663 |
unregister_pernet_device(&vti_net_ops); |
1990e4f88 vti: Simplify err... |
664 665 666 |
pernet_dev_failed: pr_err("vti init: failed to register %s ", msg); |
1181412c1 net/ipv4: VTI sup... |
667 668 669 670 671 672 |
return err; } static void __exit vti_fini(void) { rtnl_link_unregister(&vti_link_ops); |
87e66b968 ip_vti: support I... |
673 |
#if IS_ENABLED(CONFIG_INET_XFRM_TUNNEL) |
e6ce64570 ip_vti: support I... |
674 |
#if IS_ENABLED(CONFIG_IPV6) |
55a48c7ec ip_vti: not regis... |
675 |
xfrm4_tunnel_deregister(&vti_ipip6_handler, AF_INET6); |
e6ce64570 ip_vti: support I... |
676 |
#endif |
87e66b968 ip_vti: support I... |
677 678 |
xfrm4_tunnel_deregister(&vti_ipip_handler, AF_INET); #endif |
1990e4f88 vti: Simplify err... |
679 680 681 |
xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
1181412c1 net/ipv4: VTI sup... |
682 683 684 685 686 687 688 689 |
unregister_pernet_device(&vti_net_ops); } module_init(vti_init); module_exit(vti_fini); MODULE_LICENSE("GPL"); MODULE_ALIAS_RTNL_LINK("vti"); MODULE_ALIAS_NETDEV("ip_vti0"); |