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Refactor various ip tunnels xmit functions and extend iptunnel_xmit() so that there is more code sharing. Signed-off-by: Pravin B Shelar <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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| @@ -0,0 +1,88 @@ | ||
| /* | ||
| * Copyright (c) 2013 Nicira, Inc. | ||
| * | ||
| * This program is free software; you can redistribute it and/or | ||
| * modify it under the terms of version 2 of the GNU General Public | ||
| * License as published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | ||
| * 02110-1301, USA | ||
| */ | ||
|
|
||
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | ||
|
|
||
| #include <linux/types.h> | ||
| #include <linux/kernel.h> | ||
| #include <linux/skbuff.h> | ||
| #include <linux/netdevice.h> | ||
| #include <linux/in.h> | ||
| #include <linux/if_arp.h> | ||
| #include <linux/mroute.h> | ||
| #include <linux/init.h> | ||
| #include <linux/in6.h> | ||
| #include <linux/inetdevice.h> | ||
| #include <linux/netfilter_ipv4.h> | ||
| #include <linux/etherdevice.h> | ||
| #include <linux/if_ether.h> | ||
| #include <linux/if_vlan.h> | ||
|
|
||
| #include <net/ip.h> | ||
| #include <net/icmp.h> | ||
| #include <net/protocol.h> | ||
| #include <net/ip_tunnels.h> | ||
| #include <net/arp.h> | ||
| #include <net/checksum.h> | ||
| #include <net/dsfield.h> | ||
| #include <net/inet_ecn.h> | ||
| #include <net/xfrm.h> | ||
| #include <net/net_namespace.h> | ||
| #include <net/netns/generic.h> | ||
| #include <net/rtnetlink.h> | ||
|
|
||
| int iptunnel_xmit(struct net *net, struct rtable *rt, | ||
| struct sk_buff *skb, | ||
| __be32 src, __be32 dst, __u8 proto, | ||
| __u8 tos, __u8 ttl, __be16 df) | ||
| { | ||
| int pkt_len = skb->len; | ||
| struct iphdr *iph; | ||
| int err; | ||
|
|
||
| nf_reset(skb); | ||
| secpath_reset(skb); | ||
| skb->rxhash = 0; | ||
| skb_dst_drop(skb); | ||
| skb_dst_set(skb, &rt->dst); | ||
| memset(IPCB(skb), 0, sizeof(*IPCB(skb))); | ||
|
|
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| /* Push down and install the IP header. */ | ||
| __skb_push(skb, sizeof(struct iphdr)); | ||
| skb_reset_network_header(skb); | ||
|
|
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| iph = ip_hdr(skb); | ||
|
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| iph->version = 4; | ||
| iph->ihl = sizeof(struct iphdr) >> 2; | ||
| iph->frag_off = df; | ||
| iph->protocol = proto; | ||
| iph->tos = tos; | ||
| iph->daddr = dst; | ||
| iph->saddr = src; | ||
| iph->ttl = ttl; | ||
| tunnel_ip_select_ident(skb, | ||
| (const struct iphdr *)skb_inner_network_header(skb), | ||
| &rt->dst); | ||
|
|
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| err = ip_local_out(skb); | ||
| if (unlikely(net_xmit_eval(err))) | ||
| pkt_len = 0; | ||
| return pkt_len; | ||
| } | ||
| EXPORT_SYMBOL_GPL(iptunnel_xmit); |
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