diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/datagram.c | 39 | ||||
| -rw-r--r-- | net/ipv6/ping.c | 5 |
2 files changed, 31 insertions, 13 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index c215be70cac0..ace8daca5c83 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -325,14 +325,34 @@ void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) kfree_skb(skb); } -static void ip6_datagram_prepare_pktinfo_errqueue(struct sk_buff *skb) +/* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL. + * + * At one point, excluding local errors was a quick test to identify icmp/icmp6 + * errors. This is no longer true, but the test remained, so the v6 stack, + * unlike v4, also honors cmsg requests on all wifi and timestamp errors. + * + * Timestamp code paths do not initialize the fields expected by cmsg: + * the PKTINFO fields in skb->cb[]. Fill those in here. + */ +static bool ip6_datagram_support_cmsg(struct sk_buff *skb, + struct sock_exterr_skb *serr) { - int ifindex = skb->dev ? skb->dev->ifindex : -1; + if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || + serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) + return true; + + if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL) + return false; + + if (!skb->dev) + return false; if (skb->protocol == htons(ETH_P_IPV6)) - IP6CB(skb)->iif = ifindex; + IP6CB(skb)->iif = skb->dev->ifindex; else - PKTINFO_SKB_CB(skb)->ipi_ifindex = ifindex; + PKTINFO_SKB_CB(skb)->ipi_ifindex = skb->dev->ifindex; + + return true; } /* @@ -369,7 +389,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) serr = SKB_EXT_ERR(skb); - if (sin && skb->len) { + if (sin && serr->port) { const unsigned char *nh = skb_network_header(skb); sin->sin6_family = AF_INET6; sin->sin6_flowinfo = 0; @@ -394,14 +414,11 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); sin = &errhdr.offender; memset(sin, 0, sizeof(*sin)); - if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL && skb->len) { + + if (ip6_datagram_support_cmsg(skb, serr)) { sin->sin6_family = AF_INET6; - if (np->rxopt.all) { - if (serr->ee.ee_origin != SO_EE_ORIGIN_ICMP && - serr->ee.ee_origin != SO_EE_ORIGIN_ICMP6) - ip6_datagram_prepare_pktinfo_errqueue(skb); + if (np->rxopt.all) ip6_datagram_recv_common_ctl(sk, msg, skb); - } if (skb->protocol == htons(ETH_P_IPV6)) { sin->sin6_addr = ipv6_hdr(skb)->saddr; if (np->rxopt.all) diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c index fee25c0ed1f5..263a5164a6f5 100644 --- a/net/ipv6/ping.c +++ b/net/ipv6/ping.c @@ -101,9 +101,10 @@ int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_in6 *, u, msg->msg_name); - if (msg->msg_namelen < sizeof(struct sockaddr_in6) || - u->sin6_family != AF_INET6) { + if (msg->msg_namelen < sizeof(*u)) return -EINVAL; + if (u->sin6_family != AF_INET6) { + return -EAFNOSUPPORT; } if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != u->sin6_scope_id) { |