diff options
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
-rw-r--r-- | net/ipv6/ipv6_sockglue.c | 217 |
1 files changed, 87 insertions, 130 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index bf2a686aa13..4195ac92345 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -57,118 +57,6 @@ DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; -static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb, - int proto) -{ - struct inet6_protocol *ops = NULL; - - for (;;) { - struct ipv6_opt_hdr *opth; - int len; - - if (proto != NEXTHDR_HOP) { - ops = rcu_dereference(inet6_protos[proto]); - - if (unlikely(!ops)) - break; - - if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) - break; - } - - if (unlikely(!pskb_may_pull(skb, 8))) - break; - - opth = (void *)skb->data; - len = opth->hdrlen * 8 + 8; - - if (unlikely(!pskb_may_pull(skb, len))) - break; - - proto = opth->nexthdr; - __skb_pull(skb, len); - } - - return ops; -} - -static int ipv6_gso_send_check(struct sk_buff *skb) -{ - struct ipv6hdr *ipv6h; - struct inet6_protocol *ops; - int err = -EINVAL; - - if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) - goto out; - - ipv6h = ipv6_hdr(skb); - __skb_pull(skb, sizeof(*ipv6h)); - err = -EPROTONOSUPPORT; - - rcu_read_lock(); - ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); - if (likely(ops && ops->gso_send_check)) { - skb_reset_transport_header(skb); - err = ops->gso_send_check(skb); - } - rcu_read_unlock(); - -out: - return err; -} - -static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) -{ - struct sk_buff *segs = ERR_PTR(-EINVAL); - struct ipv6hdr *ipv6h; - struct inet6_protocol *ops; - - if (!(features & NETIF_F_V6_CSUM)) - features &= ~NETIF_F_SG; - - if (unlikely(skb_shinfo(skb)->gso_type & - ~(SKB_GSO_UDP | - SKB_GSO_DODGY | - SKB_GSO_TCP_ECN | - SKB_GSO_TCPV6 | - 0))) - goto out; - - if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) - goto out; - - ipv6h = ipv6_hdr(skb); - __skb_pull(skb, sizeof(*ipv6h)); - segs = ERR_PTR(-EPROTONOSUPPORT); - - rcu_read_lock(); - ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); - if (likely(ops && ops->gso_segment)) { - skb_reset_transport_header(skb); - segs = ops->gso_segment(skb, features); - } - rcu_read_unlock(); - - if (unlikely(IS_ERR(segs))) - goto out; - - for (skb = segs; skb; skb = skb->next) { - ipv6h = ipv6_hdr(skb); - ipv6h->payload_len = htons(skb->len - skb->mac_len - - sizeof(*ipv6h)); - } - -out: - return segs; -} - -static struct packet_type ipv6_packet_type = { - .type = __constant_htons(ETH_P_IPV6), - .func = ipv6_rcv, - .gso_send_check = ipv6_gso_send_check, - .gso_segment = ipv6_gso_segment, -}; - struct ip6_ra_chain *ip6_ra_chain; DEFINE_RWLOCK(ip6_ra_lock); @@ -219,6 +107,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen) { struct ipv6_pinfo *np = inet6_sk(sk); + struct net *net = sock_net(sk); int val, valbool; int retv = -ENOPROTOOPT; @@ -266,10 +155,11 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, if (sk->sk_protocol == IPPROTO_TCP) { struct inet_connection_sock *icsk = inet_csk(sk); + struct net *net = sock_net(sk); local_bh_disable(); - sock_prot_inuse_add(sk->sk_prot, -1); - sock_prot_inuse_add(&tcp_prot, 1); + sock_prot_inuse_add(net, sk->sk_prot, -1); + sock_prot_inuse_add(net, &tcp_prot, 1); local_bh_enable(); sk->sk_prot = &tcp_prot; icsk->icsk_af_ops = &ipv4_specific; @@ -278,12 +168,13 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); } else { struct proto *prot = &udp_prot; + struct net *net = sock_net(sk); if (sk->sk_protocol == IPPROTO_UDPLITE) prot = &udplite_prot; local_bh_disable(); - sock_prot_inuse_add(sk->sk_prot, -1); - sock_prot_inuse_add(prot, 1); + sock_prot_inuse_add(net, sk->sk_prot, -1); + sock_prot_inuse_add(net, prot, 1); local_bh_enable(); sk->sk_prot = prot; sk->sk_socket->ops = &inet_dgram_ops; @@ -544,7 +435,7 @@ done: if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != val) goto e_inval; - if (__dev_get_by_index(&init_net, val) == NULL) { + if (__dev_get_by_index(net, val) == NULL) { retv = -ENODEV; break; } @@ -728,7 +619,67 @@ done: retv = xfrm_user_policy(sk, optname, optval, optlen); break; + case IPV6_ADDR_PREFERENCES: + { + unsigned int pref = 0; + unsigned int prefmask = ~0; + + retv = -EINVAL; + + /* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */ + switch (val & (IPV6_PREFER_SRC_PUBLIC| + IPV6_PREFER_SRC_TMP| + IPV6_PREFER_SRC_PUBTMP_DEFAULT)) { + case IPV6_PREFER_SRC_PUBLIC: + pref |= IPV6_PREFER_SRC_PUBLIC; + break; + case IPV6_PREFER_SRC_TMP: + pref |= IPV6_PREFER_SRC_TMP; + break; + case IPV6_PREFER_SRC_PUBTMP_DEFAULT: + break; + case 0: + goto pref_skip_pubtmp; + default: + goto e_inval; + } + + prefmask &= ~(IPV6_PREFER_SRC_PUBLIC| + IPV6_PREFER_SRC_TMP); +pref_skip_pubtmp: + + /* check HOME/COA conflicts */ + switch (val & (IPV6_PREFER_SRC_HOME|IPV6_PREFER_SRC_COA)) { + case IPV6_PREFER_SRC_HOME: + break; + case IPV6_PREFER_SRC_COA: + pref |= IPV6_PREFER_SRC_COA; + case 0: + goto pref_skip_coa; + default: + goto e_inval; + } + + prefmask &= ~IPV6_PREFER_SRC_COA; +pref_skip_coa: + + /* check CGA/NONCGA conflicts */ + switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) { + case IPV6_PREFER_SRC_CGA: + case IPV6_PREFER_SRC_NONCGA: + case 0: + break; + default: + goto e_inval; + } + + np->srcprefs = (np->srcprefs & prefmask) | pref; + retv = 0; + + break; + } } + release_sock(sk); return retv; @@ -1015,9 +966,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, dst = sk_dst_get(sk); if (dst) { if (val < 0) - val = dst_metric(dst, RTAX_HOPLIMIT); - if (val < 0) - val = ipv6_get_hoplimit(dst->dev); + val = ip6_dst_hoplimit(dst); dst_release(dst); } if (val < 0) @@ -1045,6 +994,24 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, val = np->sndflow; break; + case IPV6_ADDR_PREFERENCES: + val = 0; + + if (np->srcprefs & IPV6_PREFER_SRC_TMP) + val |= IPV6_PREFER_SRC_TMP; + else if (np->srcprefs & IPV6_PREFER_SRC_PUBLIC) + val |= IPV6_PREFER_SRC_PUBLIC; + else { + /* XXX: should we return system default? */ + val |= IPV6_PREFER_SRC_PUBTMP_DEFAULT; + } + + if (np->srcprefs & IPV6_PREFER_SRC_COA) + val |= IPV6_PREFER_SRC_COA; + else + val |= IPV6_PREFER_SRC_HOME; + break; + default: return -ENOPROTOOPT; } @@ -1128,13 +1095,3 @@ int compat_ipv6_getsockopt(struct sock *sk, int level, int optname, EXPORT_SYMBOL(compat_ipv6_getsockopt); #endif -int __init ipv6_packet_init(void) -{ - dev_add_pack(&ipv6_packet_type); - return 0; -} - -void ipv6_packet_cleanup(void) -{ - dev_remove_pack(&ipv6_packet_type); -} |