X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fipv6%2Fdatagram.c;h=8b1cf3ea49cc05b2114c1dc3d6a22b93737163fa;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=fef31fb55f7ef06a3b7c6392812b731eea046ce6;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index fef31fb55..8b1cf3ea4 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -28,10 +28,166 @@ #include #include #include +#include #include #include +int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) +{ + struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; + struct inet_opt *inet = inet_sk(sk); + struct ipv6_pinfo *np = inet6_sk(sk); + struct in6_addr *daddr; + struct dst_entry *dst; + struct flowi fl; + struct ip6_flowlabel *flowlabel = NULL; + int addr_type; + int err; + + if (usin->sin6_family == AF_INET) { + if (__ipv6_only_sock(sk)) + return -EAFNOSUPPORT; + err = ip4_datagram_connect(sk, uaddr, addr_len); + goto ipv4_connected; + } + + if (addr_len < SIN6_LEN_RFC2133) + return -EINVAL; + + if (usin->sin6_family != AF_INET6) + return -EAFNOSUPPORT; + + memset(&fl, 0, sizeof(fl)); + if (np->sndflow) { + fl.fl6_flowlabel = usin->sin6_flowinfo&IPV6_FLOWINFO_MASK; + if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { + flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); + if (flowlabel == NULL) + return -EINVAL; + ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst); + } + } + + addr_type = ipv6_addr_type(&usin->sin6_addr); + + if (addr_type == IPV6_ADDR_ANY) { + /* + * connect to self + */ + usin->sin6_addr.s6_addr[15] = 0x01; + } + + daddr = &usin->sin6_addr; + + if (addr_type == IPV6_ADDR_MAPPED) { + struct sockaddr_in sin; + + if (__ipv6_only_sock(sk)) { + err = -ENETUNREACH; + goto out; + } + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = daddr->s6_addr32[3]; + sin.sin_port = usin->sin6_port; + + err = ip4_datagram_connect(sk, + (struct sockaddr*) &sin, + sizeof(sin)); + +ipv4_connected: + if (err) + goto out; + + ipv6_addr_set(&np->daddr, 0, 0, htonl(0x0000ffff), inet->daddr); + + if (ipv6_addr_any(&np->saddr)) { + ipv6_addr_set(&np->saddr, 0, 0, htonl(0x0000ffff), + inet->saddr); + } + + if (ipv6_addr_any(&np->rcv_saddr)) { + ipv6_addr_set(&np->rcv_saddr, 0, 0, htonl(0x0000ffff), + inet->rcv_saddr); + } + goto out; + } + + if (addr_type&IPV6_ADDR_LINKLOCAL) { + if (addr_len >= sizeof(struct sockaddr_in6) && + usin->sin6_scope_id) { + if (sk->sk_bound_dev_if && + sk->sk_bound_dev_if != usin->sin6_scope_id) { + err = -EINVAL; + goto out; + } + sk->sk_bound_dev_if = usin->sin6_scope_id; + if (!sk->sk_bound_dev_if && + (addr_type & IPV6_ADDR_MULTICAST)) + fl.oif = np->mcast_oif; + } + + /* Connect to link-local address requires an interface */ + if (!sk->sk_bound_dev_if) { + err = -EINVAL; + goto out; + } + } + + ipv6_addr_copy(&np->daddr, daddr); + np->flow_label = fl.fl6_flowlabel; + + inet->dport = usin->sin6_port; + + /* + * Check for a route to destination an obtain the + * destination cache for it. + */ + + fl.proto = sk->sk_protocol; + ipv6_addr_copy(&fl.fl6_dst, &np->daddr); + ipv6_addr_copy(&fl.fl6_src, &np->saddr); + fl.oif = sk->sk_bound_dev_if; + fl.fl_ip_dport = inet->dport; + fl.fl_ip_sport = inet->sport; + + if (!fl.oif && (addr_type&IPV6_ADDR_MULTICAST)) + fl.oif = np->mcast_oif; + + if (flowlabel) { + if (flowlabel->opt && flowlabel->opt->srcrt) { + struct rt0_hdr *rt0 = (struct rt0_hdr *) flowlabel->opt->srcrt; + ipv6_addr_copy(&fl.fl6_dst, rt0->addr); + } + } else if (np->opt && np->opt->srcrt) { + struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt; + ipv6_addr_copy(&fl.fl6_dst, rt0->addr); + } + + err = ip6_dst_lookup(sk, &dst, &fl); + if (err) + goto out; + + /* source address lookup done in ip6_dst_lookup */ + + if (ipv6_addr_any(&np->saddr)) + ipv6_addr_copy(&np->saddr, &fl.fl6_src); + + if (ipv6_addr_any(&np->rcv_saddr)) { + ipv6_addr_copy(&np->rcv_saddr, &fl.fl6_src); + inet->rcv_saddr = LOOPBACK4_IPV6; + } + + ip6_dst_store(sk, dst, + !ipv6_addr_cmp(&fl.fl6_dst, &np->daddr) ? + &np->daddr : NULL); + + sk->sk_state = TCP_ESTABLISHED; +out: + fl6_sock_release(flowlabel); + return err; +} + void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, u16 port, u32 info, u8 *payload) { @@ -145,10 +301,8 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len) (struct in6_addr *)(skb->nh.raw + serr->addr_offset)); if (np->sndflow) sin->sin6_flowinfo = *(u32*)(skb->nh.raw + serr->addr_offset - 24) & IPV6_FLOWINFO_MASK; - if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) { - struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; - sin->sin6_scope_id = opt->iif; - } + if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) + sin->sin6_scope_id = IP6CB(skb)->iif; } else { ipv6_addr_set(&sin->sin6_addr, 0, 0, htonl(0xffff), @@ -167,10 +321,8 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len) ipv6_addr_copy(&sin->sin6_addr, &skb->nh.ipv6h->saddr); if (np->rxopt.all) datagram_recv_ctl(sk, msg, skb); - if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) { - struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; - sin->sin6_scope_id = opt->iif; - } + if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) + sin->sin6_scope_id = IP6CB(skb)->iif; } else { struct inet_opt *inet = inet_sk(sk); @@ -211,7 +363,7 @@ out: int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb) { struct ipv6_pinfo *np = inet6_sk(sk); - struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; + struct inet6_skb_parm *opt = IP6CB(skb); if (np->rxopt.bits.rxinfo) { struct in6_pktinfo src_info;