diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2016-11-22 17:06:02 +0100 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2016-11-22 17:10:10 +0100 |
| commit | 5442adf8d39675989193a7d29c6e5be59e3942e1 (patch) | |
| tree | 2fb6e9dce567e07e470fdacc187c1ac6d944f321 /src | |
| parent | 265ba80c68fb2b9900bf66873854e564eb82e3a7 (diff) | |
device: conntrack is optional
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/Kconfig | 1 | ||||
| -rw-r--r-- | src/device.c | 16 |
2 files changed, 12 insertions, 5 deletions
diff --git a/src/Kconfig b/src/Kconfig index ef127da..84fed02 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -6,7 +6,6 @@ config WIREGUARD select NETFILTER select NETFILTER_XTABLES select NETFILTER_ADVANCED - select NF_CONNTRACK select CRYPTO_BLKCIPHER select IP6_NF_IPTABLES if IPV6 default y diff --git a/src/device.c b/src/device.c index 634d3be..478efef 100644 --- a/src/device.c +++ b/src/device.c @@ -18,8 +18,10 @@ #include <net/icmp.h> #include <net/rtnetlink.h> #include <net/ip_tunnels.h> +#if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <net/netfilter/nf_conntrack.h> #include <net/netfilter/nf_nat_core.h> +#endif static int init(struct net_device *dev) { @@ -71,24 +73,30 @@ static int stop(struct net_device *dev) static void skb_unsendable(struct sk_buff *skb, struct net_device *dev) { +#if IS_ENABLED(CONFIG_NF_CONNTRACK) /* This conntrack stuff is because the rate limiting needs to be applied - * to the original src IP, so we have to restore saddr in the IP header. */ - struct nf_conn *ct = NULL; + * to the original src IP, so we have to restore saddr in the IP header. + * It's not needed if conntracking isn't in the kernel, because in that + * case the saddr wouldn't be NAT-transformed anyway. */ enum ip_conntrack_info ctinfo; - - ct = nf_ct_get(skb, &ctinfo); + struct nf_conn *ct = nf_ct_get(skb, &ctinfo); +#endif ++dev->stats.tx_errors; if (skb->len < sizeof(struct iphdr)) goto free; if (ip_hdr(skb)->version == 4) { +#if IS_ENABLED(CONFIG_NF_CONNTRACK) if (ct) ip_hdr(skb)->saddr = ct->tuplehash[0].tuple.src.u3.ip; +#endif icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); } else if (ip_hdr(skb)->version == 6) { +#if IS_ENABLED(CONFIG_NF_CONNTRACK) if (ct) ipv6_hdr(skb)->saddr = ct->tuplehash[0].tuple.src.u3.in6; +#endif icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); } free: |