diff options
Diffstat (limited to 'net/ipv6/af_inet6.c')
| -rw-r--r-- | net/ipv6/af_inet6.c | 63 |
1 files changed, 47 insertions, 16 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index da944eca2ca6..61f55386a236 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -276,11 +276,26 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) /* Check if the address belongs to the host. */ if (addr_type == IPV6_ADDR_MAPPED) { - v4addr = addr->sin6_addr.s6_addr32[3]; - if (inet_addr_type(net, v4addr) != RTN_LOCAL) { - err = -EADDRNOTAVAIL; + int chk_addr_ret; + + /* Binding to v4-mapped address on a v6-only socket + * makes no sense + */ + if (np->ipv6only) { + err = -EINVAL; goto out; } + + /* Reproduce AF_INET checks to make the bindings consitant */ + v4addr = addr->sin6_addr.s6_addr32[3]; + chk_addr_ret = inet_addr_type(net, v4addr); + if (!sysctl_ip_nonlocal_bind && + !(inet->freebind || inet->transparent) && + v4addr != htonl(INADDR_ANY) && + chk_addr_ret != RTN_LOCAL && + chk_addr_ret != RTN_MULTICAST && + chk_addr_ret != RTN_BROADCAST) + goto out; } else { if (addr_type != IPV6_ADDR_ANY) { struct net_device *dev = NULL; @@ -339,8 +354,11 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) goto out; } - if (addr_type != IPV6_ADDR_ANY) + if (addr_type != IPV6_ADDR_ANY) { sk->sk_userlocks |= SOCK_BINDADDR_LOCK; + if (addr_type != IPV6_ADDR_MAPPED) + np->ipv6only = 1; + } if (snum) sk->sk_userlocks |= SOCK_BINDPORT_LOCK; inet->sport = htons(inet->num); @@ -803,24 +821,34 @@ static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, int proto; __wsum csum; - if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) + iph = skb_gro_header(skb, sizeof(*iph)); + if (unlikely(!iph)) goto out; - iph = ipv6_hdr(skb); - __skb_pull(skb, sizeof(*iph)); + skb_gro_pull(skb, sizeof(*iph)); + skb_set_transport_header(skb, skb_gro_offset(skb)); - flush += ntohs(iph->payload_len) != skb->len; + flush += ntohs(iph->payload_len) != skb_gro_len(skb); rcu_read_lock(); - proto = ipv6_gso_pull_exthdrs(skb, iph->nexthdr); - iph = ipv6_hdr(skb); - IPV6_GRO_CB(skb)->proto = proto; + proto = iph->nexthdr; ops = rcu_dereference(inet6_protos[proto]); - if (!ops || !ops->gro_receive) - goto out_unlock; + if (!ops || !ops->gro_receive) { + __pskb_pull(skb, skb_gro_offset(skb)); + proto = ipv6_gso_pull_exthdrs(skb, proto); + skb_gro_pull(skb, -skb_transport_offset(skb)); + skb_reset_transport_header(skb); + __skb_push(skb, skb_gro_offset(skb)); + + if (!ops || !ops->gro_receive) + goto out_unlock; + + iph = ipv6_hdr(skb); + } + + IPV6_GRO_CB(skb)->proto = proto; flush--; - skb_reset_transport_header(skb); nlen = skb_network_header_len(skb); for (p = *head; p; p = p->next) { @@ -883,8 +911,8 @@ out_unlock: return err; } -static struct packet_type ipv6_packet_type = { - .type = __constant_htons(ETH_P_IPV6), +static struct packet_type ipv6_packet_type __read_mostly = { + .type = cpu_to_be16(ETH_P_IPV6), .func = ipv6_rcv, .gso_send_check = ipv6_gso_send_check, .gso_segment = ipv6_gso_segment, @@ -1192,6 +1220,9 @@ module_init(inet6_init); static void __exit inet6_exit(void) { + if (disable_ipv6) + return; + /* First of all disallow new sockets creation. */ sock_unregister(PF_INET6); /* Disallow any further netlink messages */ |