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net/ipv4/ipip.c
22.1 KB
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/* |
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* Linux NET3: IP/IP protocol decoder. |
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* |
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* Authors: * Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95 * * Fixes: * Alan Cox : Merged and made usable non modular (its so tiny its silly as * a module taking up 2 pages). * Alan Cox : Fixed bug with 1.3.18 and IPIP not working (now needs to set skb->h.iph) * to keep ip_forward happy. * Alan Cox : More fixes for 1.3.21, and firewall fix. Maybe this will work soon 8). * Kai Schulte : Fixed #defines for IP_FIREWALL->FIREWALL * David Woodhouse : Perform some basic ICMP handling. * IPIP Routing without decapsulation. * Carlos Picoto : GRE over IP support * Alexey Kuznetsov: Reworked. Really, now it is truncated version of ipv4/ip_gre.c. * I do not want to merge them together. * * 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. * */ /* tunnel.c: an IP tunnel driver The purpose of this driver is to provide an IP tunnel through which you can tunnel network traffic transparently across subnets. This was written by looking at Nick Holloway's dummy driver Thanks for the great code! -Sam Lantinga (slouken@cs.ucdavis.edu) 02/01/95 |
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Minor tweaks: Cleaned up the code a little and added some pre-1.3.0 tweaks. dev->hard_header/hard_header_len changed to use no headers. Comments/bracketing tweaked. Made the tunnels use dev->name not tunnel: when error reporting. Added tx_dropped stat |
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-Alan Cox (alan@lxorguk.ukuu.org.uk) 21 March 95 |
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Reworked: Changed to tunnel to destination gateway in addition to the tunnel's pointopoint address Almost completely rewritten Note: There is currently no firewall or ICMP handling done. -Sam Lantinga (slouken@cs.ucdavis.edu) 02/13/96 |
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*/ /* Things I wish I had known when writing the tunnel driver: When the tunnel_xmit() function is called, the skb contains the packet to be sent (plus a great deal of extra info), and dev contains the tunnel device that _we_ are. When we are passed a packet, we are expected to fill in the source address with our source IP address. What is the proper way to allocate, copy and free a buffer? After you allocate it, it is a "0 length" chunk of memory starting at zero. If you want to add headers to the buffer later, you'll have to call "skb_reserve(skb, amount)" with the amount of memory you want reserved. Then, you call "skb_put(skb, amount)" with the amount of space you want in the buffer. skb_put() returns a pointer to the top (#0) of that buffer. skb->len is set to the amount of space you have "allocated" with skb_put(). You can then write up to skb->len bytes to that buffer. If you need more, you can call skb_put() again with the additional amount of space you need. You can |
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find out how much more space you can allocate by calling |
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"skb_tailroom(skb)". Now, to add header space, call "skb_push(skb, header_len)". This creates space at the beginning of the buffer and returns a pointer to this new space. If later you need to strip a header from a buffer, call "skb_pull(skb, header_len)". skb_headroom() will return how much space is left at the top of the buffer (before the main data). Remember, this headroom space must be reserved before the skb_put() function is called. */ /* This version of net/ipv4/ipip.c is cloned of net/ipv4/ip_gre.c For comments look at net/ipv4/ip_gre.c --ANK */ |
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#include <linux/capability.h> |
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#include <linux/module.h> #include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <asm/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> #include <linux/mroute.h> #include <linux/init.h> #include <linux/netfilter_ipv4.h> |
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#include <linux/if_ether.h> |
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#include <net/sock.h> #include <net/ip.h> #include <net/icmp.h> |
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#include <net/ipip.h> #include <net/inet_ecn.h> #include <net/xfrm.h> |
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#include <net/net_namespace.h> #include <net/netns/generic.h> |
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#define HASH_SIZE 16 |
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#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
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|
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static int ipip_net_id __read_mostly; |
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struct ipip_net { |
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struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE]; struct ip_tunnel __rcu *tunnels_r[HASH_SIZE]; struct ip_tunnel __rcu *tunnels_l[HASH_SIZE]; struct ip_tunnel __rcu *tunnels_wc[1]; struct ip_tunnel __rcu **tunnels[4]; |
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|
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struct net_device *fb_tunnel_dev; |
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}; |
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static int ipip_tunnel_init(struct net_device *dev); |
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static void ipip_tunnel_setup(struct net_device *dev); |
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static void ipip_dev_free(struct net_device *dev); |
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|
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/* |
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* Locking : hash tables are protected by RCU and RTNL |
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*/ |
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#define for_each_ip_tunnel_rcu(start) \ for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) |
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|
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/* often modified stats are per cpu, other are shared (netdev->stats) */ struct pcpu_tstats { unsigned long rx_packets; unsigned long rx_bytes; unsigned long tx_packets; unsigned long tx_bytes; |
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} __attribute__((aligned(4*sizeof(unsigned long)))); |
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static struct net_device_stats *ipip_get_stats(struct net_device *dev) { struct pcpu_tstats sum = { 0 }; int i; for_each_possible_cpu(i) { const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i); sum.rx_packets += tstats->rx_packets; sum.rx_bytes += tstats->rx_bytes; sum.tx_packets += tstats->tx_packets; sum.tx_bytes += tstats->tx_bytes; } dev->stats.rx_packets = sum.rx_packets; dev->stats.rx_bytes = sum.rx_bytes; dev->stats.tx_packets = sum.tx_packets; dev->stats.tx_bytes = sum.tx_bytes; return &dev->stats; } |
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static struct ip_tunnel * ipip_tunnel_lookup(struct net *net, __be32 remote, __be32 local) |
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{ |
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unsigned int h0 = HASH(remote); unsigned int h1 = HASH(local); |
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struct ip_tunnel *t; |
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struct ipip_net *ipn = net_generic(net, ipip_net_id); |
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|
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for_each_ip_tunnel_rcu(ipn->tunnels_r_l[h0 ^ h1]) |
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if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) return t; |
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for_each_ip_tunnel_rcu(ipn->tunnels_r[h0]) |
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if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) return t; |
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for_each_ip_tunnel_rcu(ipn->tunnels_l[h1]) |
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if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP)) return t; |
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t = rcu_dereference(ipn->tunnels_wc[0]); if (t && (t->dev->flags&IFF_UP)) |
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return t; return NULL; } |
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static struct ip_tunnel __rcu **__ipip_bucket(struct ipip_net *ipn, |
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struct ip_tunnel_parm *parms) |
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{ |
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__be32 remote = parms->iph.daddr; __be32 local = parms->iph.saddr; |
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unsigned int h = 0; |
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int prio = 0; if (remote) { prio |= 2; h ^= HASH(remote); } if (local) { prio |= 1; h ^= HASH(local); } |
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return &ipn->tunnels[prio][h]; |
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} |
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static inline struct ip_tunnel __rcu **ipip_bucket(struct ipip_net *ipn, |
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struct ip_tunnel *t) |
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{ |
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return __ipip_bucket(ipn, &t->parms); |
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} |
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|
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static void ipip_tunnel_unlink(struct ipip_net *ipn, struct ip_tunnel *t) |
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{ |
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struct ip_tunnel __rcu **tp; struct ip_tunnel *iter; for (tp = ipip_bucket(ipn, t); (iter = rtnl_dereference(*tp)) != NULL; tp = &iter->next) { if (t == iter) { |
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rcu_assign_pointer(*tp, t->next); |
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break; } } } |
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static void ipip_tunnel_link(struct ipip_net *ipn, struct ip_tunnel *t) |
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{ |
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struct ip_tunnel __rcu **tp = ipip_bucket(ipn, t); |
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rcu_assign_pointer(t->next, rtnl_dereference(*tp)); rcu_assign_pointer(*tp, t); |
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} |
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static struct ip_tunnel * ipip_tunnel_locate(struct net *net, struct ip_tunnel_parm *parms, int create) |
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{ |
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__be32 remote = parms->iph.daddr; __be32 local = parms->iph.saddr; |
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struct ip_tunnel *t, *nt; struct ip_tunnel __rcu **tp; |
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struct net_device *dev; |
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char name[IFNAMSIZ]; |
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struct ipip_net *ipn = net_generic(net, ipip_net_id); |
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|
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for (tp = __ipip_bucket(ipn, parms); (t = rtnl_dereference(*tp)) != NULL; tp = &t->next) { |
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if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) return t; } if (!create) return NULL; if (parms->name[0]) strlcpy(name, parms->name, IFNAMSIZ); |
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else |
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strcpy(name, "tunl%d"); |
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dev = alloc_netdev(sizeof(*t), name, ipip_tunnel_setup); if (dev == NULL) return NULL; |
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dev_net_set(dev, net); |
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nt = netdev_priv(dev); |
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nt->parms = *parms; |
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if (ipip_tunnel_init(dev) < 0) goto failed_free; |
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|
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if (register_netdevice(dev) < 0) goto failed_free; |
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|
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strcpy(nt->parms.name, dev->name); |
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dev_hold(dev); |
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ipip_tunnel_link(ipn, nt); |
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return nt; |
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failed_free: |
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ipip_dev_free(dev); |
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return NULL; } |
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/* called with RTNL */ |
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static void ipip_tunnel_uninit(struct net_device *dev) { |
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struct net *net = dev_net(dev); struct ipip_net *ipn = net_generic(net, ipip_net_id); |
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if (dev == ipn->fb_tunnel_dev) |
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RCU_INIT_POINTER(ipn->tunnels_wc[0], NULL); |
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else |
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ipip_tunnel_unlink(ipn, netdev_priv(dev)); |
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dev_put(dev); } |
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static int ipip_err(struct sk_buff *skb, u32 info) |
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{ |
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|
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/* All the routers (except for Linux) return only |
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8 bytes of packet payload. It means, that precise relaying of ICMP in the real Internet is absolutely infeasible. */ |
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const struct iphdr *iph = (const struct iphdr *)skb->data; |
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const int type = icmp_hdr(skb)->type; const int code = icmp_hdr(skb)->code; |
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struct ip_tunnel *t; |
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int err; |
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switch (type) { default: case ICMP_PARAMETERPROB: |
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return 0; |
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case ICMP_DEST_UNREACH: switch (code) { case ICMP_SR_FAILED: case ICMP_PORT_UNREACH: /* Impossible event. */ |
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return 0; |
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case ICMP_FRAG_NEEDED: /* Soft state for pmtu is maintained by IP core. */ |
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return 0; |
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default: /* All others are translated to HOST_UNREACH. rfc2003 contains "deep thoughts" about NET_UNREACH, I believe they are just ether pollution. --ANK */ break; } break; case ICMP_TIME_EXCEEDED: if (code != ICMP_EXC_TTL) |
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return 0; |
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break; } |
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err = -ENOENT; |
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rcu_read_lock(); |
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t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr); |
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if (t == NULL || t->parms.iph.daddr == 0) goto out; |
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err = 0; |
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if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) goto out; |
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if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
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t->err_count++; else t->err_count = 1; t->err_time = jiffies; out: |
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rcu_read_unlock(); |
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return err; |
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} |
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static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph, struct sk_buff *skb) |
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{ |
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struct iphdr *inner_iph = ip_hdr(skb); |
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if (INET_ECN_is_ce(outer_iph->tos)) IP_ECN_set_ce(inner_iph); } static int ipip_rcv(struct sk_buff *skb) { |
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struct ip_tunnel *tunnel; |
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const struct iphdr *iph = ip_hdr(skb); |
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|
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rcu_read_lock(); |
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tunnel = ipip_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr); if (tunnel != NULL) { struct pcpu_tstats *tstats; |
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if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) { |
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rcu_read_unlock(); |
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kfree_skb(skb); return 0; } secpath_reset(skb); |
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skb->mac_header = skb->network_header; |
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skb_reset_network_header(skb); |
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skb->protocol = htons(ETH_P_IP); skb->pkt_type = PACKET_HOST; |
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tstats = this_cpu_ptr(tunnel->dev->tstats); tstats->rx_packets++; tstats->rx_bytes += skb->len; __skb_tunnel_rx(skb, tunnel->dev); |
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ipip_ecn_decapsulate(iph, skb); |
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netif_rx(skb); |
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rcu_read_unlock(); |
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return 0; } |
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rcu_read_unlock(); |
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399 400 401 402 403 404 405 |
return -1; } /* * This function assumes it is being called from dev_queue_xmit() * and that skb is filled properly by that function. */ |
6fef4c0c8 netdev: convert p... |
406 |
static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4c Linux-2.6.12-rc2 |
407 |
{ |
2941a4863 [NET]: Convert ne... |
408 |
struct ip_tunnel *tunnel = netdev_priv(dev); |
3c97af99a ipip: percpu stat... |
409 |
struct pcpu_tstats *tstats; |
b71d1d426 inet: constify ip... |
410 |
const struct iphdr *tiph = &tunnel->parms.iph; |
1da177e4c Linux-2.6.12-rc2 |
411 |
u8 tos = tunnel->parms.iph.tos; |
d5a0a1e31 [IPV4]: encapsula... |
412 |
__be16 df = tiph->frag_off; |
1da177e4c Linux-2.6.12-rc2 |
413 |
struct rtable *rt; /* Route to the other host */ |
3c97af99a ipip: percpu stat... |
414 |
struct net_device *tdev; /* Device to other host */ |
b71d1d426 inet: constify ip... |
415 |
const struct iphdr *old_iph = ip_hdr(skb); |
1da177e4c Linux-2.6.12-rc2 |
416 |
struct iphdr *iph; /* Our new IP header */ |
c2636b4d9 [NET]: Treat the ... |
417 |
unsigned int max_headroom; /* The extra header space needed */ |
d5a0a1e31 [IPV4]: encapsula... |
418 |
__be32 dst = tiph->daddr; |
31e4543db ipv4: Make caller... |
419 |
struct flowi4 fl4; |
1da177e4c Linux-2.6.12-rc2 |
420 |
int mtu; |
1da177e4c Linux-2.6.12-rc2 |
421 422 |
if (skb->protocol != htons(ETH_P_IP)) goto tx_error; |
3c97af99a ipip: percpu stat... |
423 |
if (tos & 1) |
1da177e4c Linux-2.6.12-rc2 |
424 425 426 427 |
tos = old_iph->tos; if (!dst) { /* NBMA tunnel */ |
511c3f92a net: skb->rtable ... |
428 |
if ((rt = skb_rtable(skb)) == NULL) { |
3c97af99a ipip: percpu stat... |
429 |
dev->stats.tx_fifo_errors++; |
1da177e4c Linux-2.6.12-rc2 |
430 431 432 433 434 |
goto tx_error; } if ((dst = rt->rt_gateway) == 0) goto tx_error_icmp; } |
31e4543db ipv4: Make caller... |
435 |
rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, |
78fbfd8a6 ipv4: Create and ... |
436 437 438 439 440 441 442 |
dst, tiph->saddr, 0, 0, IPPROTO_IPIP, RT_TOS(tos), tunnel->parms.link); if (IS_ERR(rt)) { dev->stats.tx_carrier_errors++; goto tx_error_icmp; |
1da177e4c Linux-2.6.12-rc2 |
443 |
} |
d8d1f30b9 net-next: remove ... |
444 |
tdev = rt->dst.dev; |
1da177e4c Linux-2.6.12-rc2 |
445 446 447 |
if (tdev == dev) { ip_rt_put(rt); |
3c97af99a ipip: percpu stat... |
448 |
dev->stats.collisions++; |
1da177e4c Linux-2.6.12-rc2 |
449 450 |
goto tx_error; } |
23ca0c989 ipip: Fix handlin... |
451 452 453 |
df |= old_iph->frag_off & htons(IP_DF); if (df) { |
d8d1f30b9 net-next: remove ... |
454 |
mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr); |
1da177e4c Linux-2.6.12-rc2 |
455 |
|
23ca0c989 ipip: Fix handlin... |
456 |
if (mtu < 68) { |
3c97af99a ipip: percpu stat... |
457 |
dev->stats.collisions++; |
23ca0c989 ipip: Fix handlin... |
458 459 460 |
ip_rt_put(rt); goto tx_error; } |
1da177e4c Linux-2.6.12-rc2 |
461 |
|
23ca0c989 ipip: Fix handlin... |
462 463 |
if (skb_dst(skb)) skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); |
1da177e4c Linux-2.6.12-rc2 |
464 |
|
23ca0c989 ipip: Fix handlin... |
465 466 467 468 469 470 471 |
if ((old_iph->frag_off & htons(IP_DF)) && mtu < ntohs(old_iph->tot_len)) { icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); ip_rt_put(rt); goto tx_error; } |
1da177e4c Linux-2.6.12-rc2 |
472 473 474 |
} if (tunnel->err_count > 0) { |
26d94b46d ipip: used time_b... |
475 476 |
if (time_before(jiffies, tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { |
1da177e4c Linux-2.6.12-rc2 |
477 478 479 480 481 482 483 484 485 486 |
tunnel->err_count--; dst_link_failure(skb); } else tunnel->err_count = 0; } /* * Okay, now see if we can stuff it in the buffer as-is. */ max_headroom = (LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr)); |
cfbba49d8 [NET]: Avoid copy... |
487 488 |
if (skb_headroom(skb) < max_headroom || skb_shared(skb) || (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
1da177e4c Linux-2.6.12-rc2 |
489 490 491 |
struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); if (!new_skb) { ip_rt_put(rt); |
3c97af99a ipip: percpu stat... |
492 |
dev->stats.tx_dropped++; |
1da177e4c Linux-2.6.12-rc2 |
493 |
dev_kfree_skb(skb); |
6ed106549 net: use NETDEV_T... |
494 |
return NETDEV_TX_OK; |
1da177e4c Linux-2.6.12-rc2 |
495 496 497 498 499 |
} if (skb->sk) skb_set_owner_w(new_skb, skb->sk); dev_kfree_skb(skb); skb = new_skb; |
eddc9ec53 [SK_BUFF]: Introd... |
500 |
old_iph = ip_hdr(skb); |
1da177e4c Linux-2.6.12-rc2 |
501 |
} |
b0e380b1d [SK_BUFF]: unions... |
502 |
skb->transport_header = skb->network_header; |
e2d1bca7e [SK_BUFF]: Use sk... |
503 504 |
skb_push(skb, sizeof(struct iphdr)); skb_reset_network_header(skb); |
1da177e4c Linux-2.6.12-rc2 |
505 |
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
48d5cad87 [XFRM]: Fix SNAT-... |
506 507 |
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | IPSKB_REROUTED); |
adf30907d net: skb->dst acc... |
508 |
skb_dst_drop(skb); |
d8d1f30b9 net-next: remove ... |
509 |
skb_dst_set(skb, &rt->dst); |
1da177e4c Linux-2.6.12-rc2 |
510 511 512 513 |
/* * Push down and install the IPIP header. */ |
eddc9ec53 [SK_BUFF]: Introd... |
514 |
iph = ip_hdr(skb); |
1da177e4c Linux-2.6.12-rc2 |
515 516 517 518 519 |
iph->version = 4; iph->ihl = sizeof(struct iphdr)>>2; iph->frag_off = df; iph->protocol = IPPROTO_IPIP; iph->tos = INET_ECN_encapsulate(tos, old_iph->tos); |
69458cb19 ipv4: Use flowi4-... |
520 521 |
iph->daddr = fl4.daddr; iph->saddr = fl4.saddr; |
1da177e4c Linux-2.6.12-rc2 |
522 523 524 525 526 |
if ((iph->ttl = tiph->ttl) == 0) iph->ttl = old_iph->ttl; nf_reset(skb); |
3c97af99a ipip: percpu stat... |
527 528 |
tstats = this_cpu_ptr(dev->tstats); __IPTUNNEL_XMIT(tstats, &dev->stats); |
6ed106549 net: use NETDEV_T... |
529 |
return NETDEV_TX_OK; |
1da177e4c Linux-2.6.12-rc2 |
530 531 532 533 |
tx_error_icmp: dst_link_failure(skb); tx_error: |
3c97af99a ipip: percpu stat... |
534 |
dev->stats.tx_errors++; |
1da177e4c Linux-2.6.12-rc2 |
535 |
dev_kfree_skb(skb); |
6ed106549 net: use NETDEV_T... |
536 |
return NETDEV_TX_OK; |
1da177e4c Linux-2.6.12-rc2 |
537 |
} |
5533995b6 [IPIP]: Allow reb... |
538 539 540 541 |
static void ipip_tunnel_bind_dev(struct net_device *dev) { struct net_device *tdev = NULL; struct ip_tunnel *tunnel; |
b71d1d426 inet: constify ip... |
542 |
const struct iphdr *iph; |
5533995b6 [IPIP]: Allow reb... |
543 544 545 546 547 |
tunnel = netdev_priv(dev); iph = &tunnel->parms.iph; if (iph->daddr) { |
31e4543db ipv4: Make caller... |
548 549 550 551 552 553 554 555 556 |
struct rtable *rt; struct flowi4 fl4; rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, iph->daddr, iph->saddr, 0, 0, IPPROTO_IPIP, RT_TOS(iph->tos), tunnel->parms.link); |
b23dd4fe4 ipv4: Make output... |
557 |
if (!IS_ERR(rt)) { |
d8d1f30b9 net-next: remove ... |
558 |
tdev = rt->dst.dev; |
5533995b6 [IPIP]: Allow reb... |
559 560 561 562 563 564 |
ip_rt_put(rt); } dev->flags |= IFF_POINTOPOINT; } if (!tdev && tunnel->parms.link) |
b99f0152e [IPIP]: Use prope... |
565 |
tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link); |
5533995b6 [IPIP]: Allow reb... |
566 567 568 569 570 571 572 |
if (tdev) { dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); dev->mtu = tdev->mtu - sizeof(struct iphdr); } dev->iflink = tunnel->parms.link; } |
1da177e4c Linux-2.6.12-rc2 |
573 574 575 576 577 578 |
static int ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) { int err = 0; struct ip_tunnel_parm p; struct ip_tunnel *t; |
b9855c54d [IPIP]: Make the ... |
579 580 |
struct net *net = dev_net(dev); struct ipip_net *ipn = net_generic(net, ipip_net_id); |
1da177e4c Linux-2.6.12-rc2 |
581 582 583 584 |
switch (cmd) { case SIOCGETTUNNEL: t = NULL; |
b9855c54d [IPIP]: Make the ... |
585 |
if (dev == ipn->fb_tunnel_dev) { |
1da177e4c Linux-2.6.12-rc2 |
586 587 588 589 |
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { err = -EFAULT; break; } |
b9fae5c91 [IPIP]: Add net/i... |
590 |
t = ipip_tunnel_locate(net, &p, 0); |
1da177e4c Linux-2.6.12-rc2 |
591 592 |
} if (t == NULL) |
2941a4863 [NET]: Convert ne... |
593 |
t = netdev_priv(dev); |
1da177e4c Linux-2.6.12-rc2 |
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 |
memcpy(&p, &t->parms, sizeof(p)); if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) err = -EFAULT; break; case SIOCADDTUNNEL: case SIOCCHGTUNNEL: err = -EPERM; if (!capable(CAP_NET_ADMIN)) goto done; err = -EFAULT; if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) goto done; err = -EINVAL; if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) goto done; if (p.iph.ttl) p.iph.frag_off |= htons(IP_DF); |
b9fae5c91 [IPIP]: Add net/i... |
615 |
t = ipip_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
1da177e4c Linux-2.6.12-rc2 |
616 |
|
b9855c54d [IPIP]: Make the ... |
617 |
if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
1da177e4c Linux-2.6.12-rc2 |
618 619 620 621 622 623 624 625 626 627 628 |
if (t != NULL) { if (t->dev != dev) { err = -EEXIST; break; } } else { if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { err = -EINVAL; break; } |
2941a4863 [NET]: Convert ne... |
629 |
t = netdev_priv(dev); |
b9fae5c91 [IPIP]: Add net/i... |
630 |
ipip_tunnel_unlink(ipn, t); |
74b0b85b8 tunnels: Fix tunn... |
631 |
synchronize_net(); |
1da177e4c Linux-2.6.12-rc2 |
632 633 634 635 |
t->parms.iph.saddr = p.iph.saddr; t->parms.iph.daddr = p.iph.daddr; memcpy(dev->dev_addr, &p.iph.saddr, 4); memcpy(dev->broadcast, &p.iph.daddr, 4); |
b9fae5c91 [IPIP]: Add net/i... |
636 |
ipip_tunnel_link(ipn, t); |
1da177e4c Linux-2.6.12-rc2 |
637 638 639 640 641 642 643 644 645 646 |
netdev_state_change(dev); } } if (t) { err = 0; if (cmd == SIOCCHGTUNNEL) { t->parms.iph.ttl = p.iph.ttl; t->parms.iph.tos = p.iph.tos; t->parms.iph.frag_off = p.iph.frag_off; |
5533995b6 [IPIP]: Allow reb... |
647 648 649 650 651 |
if (t->parms.link != p.link) { t->parms.link = p.link; ipip_tunnel_bind_dev(dev); netdev_state_change(dev); } |
1da177e4c Linux-2.6.12-rc2 |
652 653 654 655 656 657 658 659 660 661 662 |
} if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) err = -EFAULT; } else err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); break; case SIOCDELTUNNEL: err = -EPERM; if (!capable(CAP_NET_ADMIN)) goto done; |
b9855c54d [IPIP]: Make the ... |
663 |
if (dev == ipn->fb_tunnel_dev) { |
1da177e4c Linux-2.6.12-rc2 |
664 665 666 667 |
err = -EFAULT; if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) goto done; err = -ENOENT; |
b9fae5c91 [IPIP]: Add net/i... |
668 |
if ((t = ipip_tunnel_locate(net, &p, 0)) == NULL) |
1da177e4c Linux-2.6.12-rc2 |
669 670 |
goto done; err = -EPERM; |
b9855c54d [IPIP]: Make the ... |
671 |
if (t->dev == ipn->fb_tunnel_dev) |
1da177e4c Linux-2.6.12-rc2 |
672 673 674 |
goto done; dev = t->dev; } |
22f8cde5b [NET]: unregister... |
675 676 |
unregister_netdevice(dev); err = 0; |
1da177e4c Linux-2.6.12-rc2 |
677 678 679 680 681 682 683 684 685 |
break; default: err = -EINVAL; } done: return err; } |
1da177e4c Linux-2.6.12-rc2 |
686 687 688 689 690 691 692 |
static int ipip_tunnel_change_mtu(struct net_device *dev, int new_mtu) { if (new_mtu < 68 || new_mtu > 0xFFF8 - sizeof(struct iphdr)) return -EINVAL; dev->mtu = new_mtu; return 0; } |
23a12b147 ipip: convert to ... |
693 694 695 696 697 |
static const struct net_device_ops ipip_netdev_ops = { .ndo_uninit = ipip_tunnel_uninit, .ndo_start_xmit = ipip_tunnel_xmit, .ndo_do_ioctl = ipip_tunnel_ioctl, .ndo_change_mtu = ipip_tunnel_change_mtu, |
3c97af99a ipip: percpu stat... |
698 |
.ndo_get_stats = ipip_get_stats, |
23a12b147 ipip: convert to ... |
699 |
}; |
3c97af99a ipip: percpu stat... |
700 701 702 703 704 |
static void ipip_dev_free(struct net_device *dev) { free_percpu(dev->tstats); free_netdev(dev); } |
1da177e4c Linux-2.6.12-rc2 |
705 706 |
static void ipip_tunnel_setup(struct net_device *dev) { |
23a12b147 ipip: convert to ... |
707 |
dev->netdev_ops = &ipip_netdev_ops; |
3c97af99a ipip: percpu stat... |
708 |
dev->destructor = ipip_dev_free; |
1da177e4c Linux-2.6.12-rc2 |
709 710 711 |
dev->type = ARPHRD_TUNNEL; dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
46f25dffb [NET]: Change 150... |
712 |
dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
1da177e4c Linux-2.6.12-rc2 |
713 714 715 |
dev->flags = IFF_NOARP; dev->iflink = 0; dev->addr_len = 4; |
0a826406d [IPIP]: Allow to ... |
716 |
dev->features |= NETIF_F_NETNS_LOCAL; |
153f09433 ipip: enable lock... |
717 |
dev->features |= NETIF_F_LLTX; |
28e72216d net: unset IFF_XM... |
718 |
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4c Linux-2.6.12-rc2 |
719 |
} |
3c97af99a ipip: percpu stat... |
720 |
static int ipip_tunnel_init(struct net_device *dev) |
1da177e4c Linux-2.6.12-rc2 |
721 |
{ |
23a12b147 ipip: convert to ... |
722 |
struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4c Linux-2.6.12-rc2 |
723 724 |
tunnel->dev = dev; |
1da177e4c Linux-2.6.12-rc2 |
725 726 727 |
memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); |
5533995b6 [IPIP]: Allow reb... |
728 |
ipip_tunnel_bind_dev(dev); |
3c97af99a ipip: percpu stat... |
729 730 731 732 733 734 |
dev->tstats = alloc_percpu(struct pcpu_tstats); if (!dev->tstats) return -ENOMEM; return 0; |
1da177e4c Linux-2.6.12-rc2 |
735 |
} |
fada5636f ipip: fix percpu ... |
736 |
static int __net_init ipip_fb_tunnel_init(struct net_device *dev) |
1da177e4c Linux-2.6.12-rc2 |
737 |
{ |
2941a4863 [NET]: Convert ne... |
738 |
struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4c Linux-2.6.12-rc2 |
739 |
struct iphdr *iph = &tunnel->parms.iph; |
44d3c299d [IPIP]: Make tunn... |
740 |
struct ipip_net *ipn = net_generic(dev_net(dev), ipip_net_id); |
1da177e4c Linux-2.6.12-rc2 |
741 742 743 744 745 746 747 |
tunnel->dev = dev; strcpy(tunnel->parms.name, dev->name); iph->version = 4; iph->protocol = IPPROTO_IPIP; iph->ihl = 5; |
fada5636f ipip: fix percpu ... |
748 749 750 |
dev->tstats = alloc_percpu(struct pcpu_tstats); if (!dev->tstats) return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
751 |
dev_hold(dev); |
cf778b00e net: reintroduce ... |
752 |
rcu_assign_pointer(ipn->tunnels_wc[0], tunnel); |
fada5636f ipip: fix percpu ... |
753 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
754 |
} |
6dcd814bd net: struct xfrm_... |
755 |
static struct xfrm_tunnel ipip_handler __read_mostly = { |
1da177e4c Linux-2.6.12-rc2 |
756 757 |
.handler = ipip_rcv, .err_handler = ipip_err, |
d2acc3479 [INET]: Introduce... |
758 |
.priority = 1, |
1da177e4c Linux-2.6.12-rc2 |
759 |
}; |
5747a1aac ip: ipip compile ... |
760 |
static const char banner[] __initconst = |
1da177e4c Linux-2.6.12-rc2 |
761 762 |
KERN_INFO "IPv4 over IPv4 tunneling driver "; |
0694c4c01 ipip: Optimize mu... |
763 |
static void ipip_destroy_tunnels(struct ipip_net *ipn, struct list_head *head) |
44d3c299d [IPIP]: Make tunn... |
764 765 766 767 768 769 |
{ int prio; for (prio = 1; prio < 4; prio++) { int h; for (h = 0; h < HASH_SIZE; h++) { |
b7285b791 ipip: get rid of ... |
770 |
struct ip_tunnel *t; |
0694c4c01 ipip: Optimize mu... |
771 |
|
b7285b791 ipip: get rid of ... |
772 |
t = rtnl_dereference(ipn->tunnels[prio][h]); |
0694c4c01 ipip: Optimize mu... |
773 774 |
while (t != NULL) { unregister_netdevice_queue(t->dev, head); |
b7285b791 ipip: get rid of ... |
775 |
t = rtnl_dereference(t->next); |
0694c4c01 ipip: Optimize mu... |
776 |
} |
44d3c299d [IPIP]: Make tunn... |
777 778 779 |
} } } |
2c8c1e729 net: spread __net... |
780 |
static int __net_init ipip_init_net(struct net *net) |
10dc4c7bb [IPIP]: Introduce... |
781 |
{ |
86de8a631 net: Simplify ipi... |
782 |
struct ipip_net *ipn = net_generic(net, ipip_net_id); |
72b36015b ipip, sit: copy p... |
783 |
struct ip_tunnel *t; |
10dc4c7bb [IPIP]: Introduce... |
784 |
int err; |
10dc4c7bb [IPIP]: Introduce... |
785 |
|
44d3c299d [IPIP]: Make tunn... |
786 787 788 789 |
ipn->tunnels[0] = ipn->tunnels_wc; ipn->tunnels[1] = ipn->tunnels_l; ipn->tunnels[2] = ipn->tunnels_r; ipn->tunnels[3] = ipn->tunnels_r_l; |
b9855c54d [IPIP]: Make the ... |
790 791 792 793 794 795 796 |
ipn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "tunl0", ipip_tunnel_setup); if (!ipn->fb_tunnel_dev) { err = -ENOMEM; goto err_alloc_dev; } |
be77e5930 net: fix tunnels ... |
797 |
dev_net_set(ipn->fb_tunnel_dev, net); |
b9855c54d [IPIP]: Make the ... |
798 |
|
fada5636f ipip: fix percpu ... |
799 800 801 |
err = ipip_fb_tunnel_init(ipn->fb_tunnel_dev); if (err) goto err_reg_dev; |
b9855c54d [IPIP]: Make the ... |
802 803 804 |
if ((err = register_netdev(ipn->fb_tunnel_dev))) goto err_reg_dev; |
72b36015b ipip, sit: copy p... |
805 806 807 |
t = netdev_priv(ipn->fb_tunnel_dev); strcpy(t->parms.name, ipn->fb_tunnel_dev->name); |
10dc4c7bb [IPIP]: Introduce... |
808 |
return 0; |
b9855c54d [IPIP]: Make the ... |
809 |
err_reg_dev: |
fada5636f ipip: fix percpu ... |
810 |
ipip_dev_free(ipn->fb_tunnel_dev); |
b9855c54d [IPIP]: Make the ... |
811 812 |
err_alloc_dev: /* nothing */ |
10dc4c7bb [IPIP]: Introduce... |
813 814 |
return err; } |
2c8c1e729 net: spread __net... |
815 |
static void __net_exit ipip_exit_net(struct net *net) |
10dc4c7bb [IPIP]: Introduce... |
816 |
{ |
86de8a631 net: Simplify ipi... |
817 |
struct ipip_net *ipn = net_generic(net, ipip_net_id); |
0694c4c01 ipip: Optimize mu... |
818 |
LIST_HEAD(list); |
10dc4c7bb [IPIP]: Introduce... |
819 |
|
b9855c54d [IPIP]: Make the ... |
820 |
rtnl_lock(); |
0694c4c01 ipip: Optimize mu... |
821 822 823 |
ipip_destroy_tunnels(ipn, &list); unregister_netdevice_queue(ipn->fb_tunnel_dev, &list); unregister_netdevice_many(&list); |
b9855c54d [IPIP]: Make the ... |
824 |
rtnl_unlock(); |
10dc4c7bb [IPIP]: Introduce... |
825 826 827 828 829 |
} static struct pernet_operations ipip_net_ops = { .init = ipip_init_net, .exit = ipip_exit_net, |
86de8a631 net: Simplify ipi... |
830 831 |
.id = &ipip_net_id, .size = sizeof(struct ipip_net), |
10dc4c7bb [IPIP]: Introduce... |
832 |
}; |
1da177e4c Linux-2.6.12-rc2 |
833 834 835 836 837 |
static int __init ipip_init(void) { int err; printk(banner); |
d5aa407f5 tunnels: fix netn... |
838 839 840 841 842 843 |
err = register_pernet_device(&ipip_net_ops); if (err < 0) return err; err = xfrm4_tunnel_register(&ipip_handler, AF_INET); if (err < 0) { unregister_pernet_device(&ipip_net_ops); |
1da177e4c Linux-2.6.12-rc2 |
844 845 |
printk(KERN_INFO "ipip init: can't register tunnel "); |
1da177e4c Linux-2.6.12-rc2 |
846 |
} |
1da177e4c Linux-2.6.12-rc2 |
847 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
848 849 850 851 |
} static void __exit ipip_fini(void) { |
c0d56408e [IPSEC]: Changing... |
852 |
if (xfrm4_tunnel_deregister(&ipip_handler, AF_INET)) |
1da177e4c Linux-2.6.12-rc2 |
853 854 |
printk(KERN_INFO "ipip close: can't deregister tunnel "); |
86de8a631 net: Simplify ipi... |
855 |
unregister_pernet_device(&ipip_net_ops); |
1da177e4c Linux-2.6.12-rc2 |
856 857 858 859 860 |
} module_init(ipip_init); module_exit(ipip_fini); MODULE_LICENSE("GPL"); |
8909c9ad8 net: don't allow ... |
861 |
MODULE_ALIAS_NETDEV("tunl0"); |