diff options
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/gre_demux.c | 6 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 9 |
2 files changed, 6 insertions, 9 deletions
diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c index 371674801e84..a41e73ab1369 100644 --- a/net/ipv4/gre_demux.c +++ b/net/ipv4/gre_demux.c @@ -60,8 +60,9 @@ int gre_del_protocol(const struct gre_protocol *proto, u8 version) } 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, int *ret_hdr_len) + bool *csum_err) { const struct gre_base_hdr *greh; __be32 *options; @@ -119,8 +120,7 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, return -EINVAL; } } - *ret_hdr_len = hdr_len; - return 0; + return hdr_len; } EXPORT_SYMBOL(gre_parse_header); diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index b99213c46aac..8260a707b9b8 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -221,16 +221,12 @@ static void gre_err(struct sk_buff *skb, u32 info) const int code = icmp_hdr(skb)->code; struct tnl_ptk_info tpi; bool csum_err = false; - int hdr_len; - if (gre_parse_header(skb, &tpi, &csum_err, &hdr_len)) { + if (gre_parse_header(skb, &tpi, &csum_err) < 0) { if (!csum_err) /* ignore csum errors. */ return; } - if (iptunnel_pull_header(skb, hdr_len, tpi.proto, false)) - return; - if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { ipv4_update_pmtu(skb, dev_net(skb->dev), info, skb->dev->ifindex, 0, IPPROTO_GRE, 0); @@ -314,7 +310,8 @@ static int gre_rcv(struct sk_buff *skb) } #endif - if (gre_parse_header(skb, &tpi, &csum_err, &hdr_len) < 0) + hdr_len = gre_parse_header(skb, &tpi, &csum_err); + if (hdr_len < 0) goto drop; if (iptunnel_pull_header(skb, hdr_len, tpi.proto, false)) |