From 32bbd8793f24b0d5beb1cdb33c45c75ad1140e4b Mon Sep 17 00:00:00 2001 From: Stefano Brivio Date: Thu, 8 Nov 2018 12:19:21 +0100 Subject: net: Convert protocol error handlers from void to int We'll need this to handle ICMP errors for tunnels without a sending socket (i.e. FoU and GUE). There, we might have to look up different types of IP tunnels, registered as network protocols, before we get a match, so we want this for the error handlers of IPPROTO_IPIP and IPPROTO_IPV6 in both inet_protos and inet6_protos. These error codes will be used in the next patch. For consistency, return sensible error codes in protocol error handlers whenever handlers can't handle errors because, even if valid, they don't match a protocol or any of its states. This has no effect on existing error handling paths. Signed-off-by: Stefano Brivio Reviewed-by: Sabrina Dubroca Signed-off-by: David S. Miller --- net/sctp/input.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net/sctp/input.c') diff --git a/net/sctp/input.c b/net/sctp/input.c index 5c36a99882ed..7ab08a5b36dc 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -574,7 +574,7 @@ void sctp_err_finish(struct sock *sk, struct sctp_transport *t) * is probably better. * */ -void sctp_v4_err(struct sk_buff *skb, __u32 info) +int sctp_v4_err(struct sk_buff *skb, __u32 info) { const struct iphdr *iph = (const struct iphdr *)skb->data; const int ihlen = iph->ihl * 4; @@ -599,7 +599,7 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) skb->transport_header = savesctp; if (!sk) { __ICMP_INC_STATS(net, ICMP_MIB_INERRORS); - return; + return -ENOENT; } /* Warning: The sock lock is held. Remember to call * sctp_err_finish! @@ -653,6 +653,7 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) out_unlock: sctp_err_finish(sk, transport); + return 0; } /* -- cgit v1.2.3