One of the bugs documented in the raw(7) man page is as follows: When the
IP_HDRINCL option is set, datagrams will not be fragmented and are limited to
the interface MTU.
This patch fixes the bug by removing the check for "length > rt->dst.dev->mtu"
in raw_send_hdrinc() (net/ipv4/raw.c). Datagrams are no longer limited to the
interface MTU size if the IP_HDRINCL option is set, but are fragmented, if
necessary, in the same way as all other datagrams.
Signed-off-by: Alan Davey <alan.da...@metaswitch.com>
---
net/ipv4/raw.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 8d22de7..de690b3 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -351,11 +351,6 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4
*fl4,
struct rtable *rt = *rtp;
int hlen, tlen;
- if (length > rt->dst.dev->mtu) {
- ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
- rt->dst.dev->mtu);
- return -EMSGSIZE;
- }
if (flags&MSG_PROBE)
goto out;
--
1.8.3.1
