From 17b69106e17e7b372514549b4e35fd8733d2d81c Mon Sep 17 00:00:00 2001 From: Joe Holden Date: Tue, 7 May 2019 17:30:31 +0000 Subject: 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 --- src/compat/compat.h | 3 +++ src/socket.c | 3 +++ 2 files changed, 6 insertions(+) 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); -- cgit v1.2.3-59-g8ed1b