diff options
Diffstat (limited to 'net/ipv6/icmp.c')
| -rw-r--r-- | net/ipv6/icmp.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index e8398ffb5e35..a7c31ab67c5d 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -725,6 +725,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb) struct ipcm6_cookie ipc6; u32 mark = IP6_REPLY_MARK(net, skb->mark); bool acast; + u8 type; if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) && net->ipv6.sysctl.icmpv6_echo_ignore_multicast) @@ -740,8 +741,13 @@ static void icmpv6_echo_reply(struct sk_buff *skb) !(net->ipv6.sysctl.anycast_src_echo_reply && acast)) saddr = NULL; + if (icmph->icmp6_type == ICMPV6_EXT_ECHO_REQUEST) + type = ICMPV6_EXT_ECHO_REPLY; + else + type = ICMPV6_ECHO_REPLY; + memcpy(&tmp_hdr, icmph, sizeof(tmp_hdr)); - tmp_hdr.icmp6_type = ICMPV6_ECHO_REPLY; + tmp_hdr.icmp6_type = type; memset(&fl6, 0, sizeof(fl6)); if (net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ICMPV6_ECHO_REPLIES) @@ -752,7 +758,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb) if (saddr) fl6.saddr = *saddr; fl6.flowi6_oif = icmp6_iif(skb); - fl6.fl6_icmp_type = ICMPV6_ECHO_REPLY; + fl6.fl6_icmp_type = type; fl6.flowi6_mark = mark; fl6.flowi6_uid = sock_net_uid(net, NULL); security_skb_classify_flow(skb, flowi6_to_flowi_common(&fl6)); @@ -783,13 +789,17 @@ static void icmpv6_echo_reply(struct sk_buff *skb) msg.skb = skb; msg.offset = 0; - msg.type = ICMPV6_ECHO_REPLY; + msg.type = type; ipcm6_init_sk(&ipc6, np); ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); ipc6.tclass = ipv6_get_dsfield(ipv6_hdr(skb)); ipc6.sockc.mark = mark; + if (icmph->icmp6_type == ICMPV6_EXT_ECHO_REQUEST) + if (!icmp_build_probe(skb, (struct icmphdr *)&tmp_hdr)) + goto out_dst_release; + if (ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr), sizeof(struct icmp6hdr), &ipc6, &fl6, @@ -911,6 +921,11 @@ static int icmpv6_rcv(struct sk_buff *skb) if (!net->ipv6.sysctl.icmpv6_echo_ignore_all) icmpv6_echo_reply(skb); break; + case ICMPV6_EXT_ECHO_REQUEST: + if (!net->ipv6.sysctl.icmpv6_echo_ignore_all && + net->ipv4.sysctl_icmp_echo_enable_probe) + icmpv6_echo_reply(skb); + break; case ICMPV6_ECHO_REPLY: success = ping_rcv(skb); |