From da73b4e9538b9be96498241ab3f13eab94181e96 Mon Sep 17 00:00:00 2001 From: Haishuang Yan Date: Wed, 11 May 2016 18:48:32 +0800 Subject: gre: Fix wrong tpi->proto in WCCP When dealing with WCCP in gre6 tunnel, it sets the wrong tpi->protocol, that is, ETH_P_IP instead of ETH_P_IPV6 for the encapuslated traffic. Signed-off-by: Haishuang Yan Signed-off-by: David S. Miller --- net/ipv4/gre_demux.c | 6 +++--- net/ipv4/ip_gre.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) (limited to 'net/ipv4') diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c index d78e2eefc0f7..4c39f4fd332a 100644 --- a/net/ipv4/gre_demux.c +++ b/net/ipv4/gre_demux.c @@ -62,7 +62,7 @@ EXPORT_SYMBOL_GPL(gre_del_protocol); /* Fills in tpi and returns header length to be pulled. */ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, - bool *csum_err) + bool *csum_err, __be16 proto) { const struct gre_base_hdr *greh; __be32 *options; @@ -109,11 +109,11 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, tpi->seq = 0; } /* WCCP version 1 and 2 protocol decoding. - * - Change protocol to IP + * - Change protocol to IPv4/IPv6 * - When dealing with WCCPv2, Skip extra 4 bytes in GRE header */ if (greh->flags == 0 && tpi->proto == htons(ETH_P_WCCP)) { - tpi->proto = htons(ETH_P_IP); + tpi->proto = proto; if ((*(u8 *)options & 0xF0) != 0x40) hdr_len += 4; } diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 2b267e71ebf5..aaeb478b54cd 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -222,7 +222,7 @@ static void gre_err(struct sk_buff *skb, u32 info) struct tnl_ptk_info tpi; bool csum_err = false; - if (gre_parse_header(skb, &tpi, &csum_err) < 0) { + if (gre_parse_header(skb, &tpi, &csum_err, htons(ETH_P_IP)) < 0) { if (!csum_err) /* ignore csum errors. */ return; } @@ -335,7 +335,7 @@ static int gre_rcv(struct sk_buff *skb) } #endif - hdr_len = gre_parse_header(skb, &tpi, &csum_err); + hdr_len = gre_parse_header(skb, &tpi, &csum_err, htons(ETH_P_IP)); if (hdr_len < 0) goto drop; -- cgit v1.2.3