projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 0e6fbc5b PS |
1 | /* |
| 2 | * Copyright (c) 2013 Nicira, Inc. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of version 2 of the GNU General Public | |
| 6 | * License as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, but | |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 11 | * General Public License for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program; if not, write to the Free Software | |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
| 16 | * 02110-1301, USA | |
| 17 | */ | |
| 18 | ||
| 19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
| 20 | ||
| 21 | #include <linux/types.h> | |
| 22 | #include <linux/kernel.h> | |
| 23 | #include <linux/skbuff.h> | |
| 24 | #include <linux/netdevice.h> | |
| 25 | #include <linux/in.h> | |
| 26 | #include <linux/if_arp.h> | |
| 27 | #include <linux/mroute.h> | |
| 28 | #include <linux/init.h> | |
| 29 | #include <linux/in6.h> | |
| 30 | #include <linux/inetdevice.h> | |
| 31 | #include <linux/netfilter_ipv4.h> | |
| 32 | #include <linux/etherdevice.h> | |
| 33 | #include <linux/if_ether.h> | |
| 34 | #include <linux/if_vlan.h> | |
| 35 | ||
| 36 | #include <net/ip.h> | |
| 37 | #include <net/icmp.h> | |
| 38 | #include <net/protocol.h> | |
| 39 | #include <net/ip_tunnels.h> | |
| 40 | #include <net/arp.h> | |
| 41 | #include <net/checksum.h> | |
| 42 | #include <net/dsfield.h> | |
| 43 | #include <net/inet_ecn.h> | |
| 44 | #include <net/xfrm.h> | |
| 45 | #include <net/net_namespace.h> | |
| 46 | #include <net/netns/generic.h> | |
| 47 | #include <net/rtnetlink.h> | |
| 48 | ||
| 49 | int iptunnel_xmit(struct net *net, struct rtable *rt, | |
| 50 | struct sk_buff *skb, | |
| 51 | __be32 src, __be32 dst, __u8 proto, | |
| 52 | __u8 tos, __u8 ttl, __be16 df) | |
| 53 | { | |
| 54 | int pkt_len = skb->len; | |
| 55 | struct iphdr *iph; | |
| 56 | int err; | |
| 57 | ||
| 58 | nf_reset(skb); | |
| 59 | secpath_reset(skb); | |
| 60 | skb->rxhash = 0; | |
| 61 | skb_dst_drop(skb); | |
| 62 | skb_dst_set(skb, &rt->dst); | |
| 63 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); | |
| 64 | ||
| 65 | /* Push down and install the IP header. */ | |
| 66 | __skb_push(skb, sizeof(struct iphdr)); | |
| 67 | skb_reset_network_header(skb); | |
| 68 | ||
| 69 | iph = ip_hdr(skb); | |
| 70 | ||
| 71 | iph->version = 4; | |
| 72 | iph->ihl = sizeof(struct iphdr) >> 2; | |
| 73 | iph->frag_off = df; | |
| 74 | iph->protocol = proto; | |
| 75 | iph->tos = tos; | |
| 76 | iph->daddr = dst; | |
| 77 | iph->saddr = src; | |
| 78 | iph->ttl = ttl; | |
| 79 | tunnel_ip_select_ident(skb, | |
| 80 | (const struct iphdr *)skb_inner_network_header(skb), | |
| 81 | &rt->dst); | |
| 82 | ||
| 83 | err = ip_local_out(skb); | |
| 84 | if (unlikely(net_xmit_eval(err))) | |
| 85 | pkt_len = 0; | |
| 86 | return pkt_len; | |
| 87 | } | |
| 88 | EXPORT_SYMBOL_GPL(iptunnel_xmit); |