diff options
| author | Joe Holden <jwh@zorins.us> | 2019-05-07 17:30:31 +0000 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2019-05-29 01:23:24 +0200 |
| commit | 3e887a391e13a4c752e577d73dabb48bdd6b2c3e (patch) | |
| tree | 0e24bc279f4f40f461a04031de7a5b239eb64a9e | |
| parent | 0e63eafa2daf57bee7808ffae27720347d9d0652 (diff) | |
socket: set ignore_df=1 on xmit
This allows the kernel to generate ipv6 fragments. Apply the same
to ipv4 for consistency.
Signed-off-by: Joe Holden <jwh@zorins.us>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | src/compat/compat.h | 3 | ||||
| -rw-r--r-- | src/socket.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/src/compat/compat.h b/src/compat/compat.h index 6ee3ac8..e8fa1ab 100644 --- a/src/compat/compat.h +++ b/src/compat/compat.h @@ -778,6 +778,9 @@ struct __kernel_timespec { #define skb_probe_transport_header(a) skb_probe_transport_header(a, 0) #endif +#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 0) && !defined(ISRHEL7) +#define ignore_df local_df +#endif #if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0) /* Note that all intentional uses of the non-_bh variety need to explicitly diff --git a/src/socket.c b/src/socket.c index 5a77b0c..d4f65bb 100644 --- a/src/socket.c +++ b/src/socket.c @@ -86,6 +86,8 @@ static int send4(struct wg_device *wg, struct sk_buff *skb, if (cache) dst_cache_set_ip4(cache, &rt->dst, fl.saddr); } + + skb->ignore_df = 1; udp_tunnel_xmit_skb(rt, sock, skb, fl.saddr, fl.daddr, ds, ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport, fl.fl4_dport, false, false); @@ -157,6 +159,7 @@ static int send6(struct wg_device *wg, struct sk_buff *skb, dst_cache_set_ip6(cache, dst, &fl.saddr); } + skb->ignore_df = 1; udp_tunnel6_xmit_skb(dst, sock, skb, skb->dev, &fl.saddr, &fl.daddr, ds, ip6_dst_hoplimit(dst), 0, fl.fl6_sport, fl.fl6_dport, false); |