X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=net%2Fipv6%2Ftcp_ipv6.c;h=e5310c9b84dcb2216f1db0b21ab92c3ed7a222b7;hb=ec8deffa33757286ba59e71d3d98173c37638b37;hp=b585c850a89a3737b1b6a19aab62dd7dd1cee5cb;hpb=af7c951d76708c61b862463d579d76be757130bf;p=linux-2.6-omap-h63xx.git diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index b585c850a89..e5310c9b84d 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -330,7 +330,8 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, th->dest, &hdr->saddr, th->source, skb->dev->ifindex); if (sk == NULL) { - ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS); + ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), + ICMP6_MIB_INERRORS); return; } @@ -941,117 +942,14 @@ static int tcp_v6_gso_send_check(struct sk_buff *skb) return 0; } -static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb) +static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, + u32 ts, struct tcp_md5sig_key *key, int rst) { struct tcphdr *th = tcp_hdr(skb), *t1; struct sk_buff *buff; struct flowi fl; struct net *net = dev_net(skb->dst->dev); struct sock *ctl_sk = net->ipv6.tcp_sk; - unsigned int tot_len = sizeof(*th); -#ifdef CONFIG_TCP_MD5SIG - struct tcp_md5sig_key *key; -#endif - - if (th->rst) - return; - - if (!ipv6_unicast_destination(skb)) - return; - -#ifdef CONFIG_TCP_MD5SIG - if (sk) - key = tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr); - else - key = NULL; - - if (key) - tot_len += TCPOLEN_MD5SIG_ALIGNED; -#endif - - /* - * We need to grab some memory, and put together an RST, - * and then put it into the queue to be sent. - */ - - buff = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) + tot_len, - GFP_ATOMIC); - if (buff == NULL) - return; - - skb_reserve(buff, MAX_HEADER + sizeof(struct ipv6hdr) + tot_len); - - t1 = (struct tcphdr *) skb_push(buff, tot_len); - - /* Swap the send and the receive. */ - memset(t1, 0, sizeof(*t1)); - t1->dest = th->source; - t1->source = th->dest; - t1->doff = tot_len / 4; - t1->rst = 1; - - if(th->ack) { - t1->seq = th->ack_seq; - } else { - t1->ack = 1; - t1->ack_seq = htonl(ntohl(th->seq) + th->syn + th->fin - + skb->len - (th->doff<<2)); - } - -#ifdef CONFIG_TCP_MD5SIG - if (key) { - __be32 *opt = (__be32*)(t1 + 1); - opt[0] = htonl((TCPOPT_NOP << 24) | - (TCPOPT_NOP << 16) | - (TCPOPT_MD5SIG << 8) | - TCPOLEN_MD5SIG); - tcp_v6_md5_hash_hdr((__u8 *)&opt[1], key, - &ipv6_hdr(skb)->daddr, - &ipv6_hdr(skb)->saddr, t1); - } -#endif - - buff->csum = csum_partial((char *)t1, sizeof(*t1), 0); - - memset(&fl, 0, sizeof(fl)); - ipv6_addr_copy(&fl.fl6_dst, &ipv6_hdr(skb)->saddr); - ipv6_addr_copy(&fl.fl6_src, &ipv6_hdr(skb)->daddr); - - t1->check = csum_ipv6_magic(&fl.fl6_src, &fl.fl6_dst, - sizeof(*t1), IPPROTO_TCP, - buff->csum); - - fl.proto = IPPROTO_TCP; - fl.oif = inet6_iif(skb); - fl.fl_ip_dport = t1->dest; - fl.fl_ip_sport = t1->source; - security_skb_classify_flow(skb, &fl); - - /* Pass a socket to ip6_dst_lookup either it is for RST - * Underlying function will use this to retrieve the network - * namespace - */ - if (!ip6_dst_lookup(ctl_sk, &buff->dst, &fl)) { - - if (xfrm_lookup(&buff->dst, &fl, NULL, 0) >= 0) { - ip6_xmit(ctl_sk, buff, &fl, NULL, 0); - TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); - TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); - return; - } - } - - kfree_skb(buff); -} - -static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts, - struct tcp_md5sig_key *key) -{ - struct tcphdr *th = tcp_hdr(skb), *t1; - struct sk_buff *buff; - struct flowi fl; - struct net *net = dev_net(skb->dev); - struct sock *ctl_sk = net->ipv6.tcp_sk; unsigned int tot_len = sizeof(struct tcphdr); __be32 *topt; @@ -1069,16 +967,17 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 skb_reserve(buff, MAX_HEADER + sizeof(struct ipv6hdr) + tot_len); - t1 = (struct tcphdr *) skb_push(buff,tot_len); + t1 = (struct tcphdr *) skb_push(buff, tot_len); /* Swap the send and the receive. */ memset(t1, 0, sizeof(*t1)); t1->dest = th->source; t1->source = th->dest; - t1->doff = tot_len/4; + t1->doff = tot_len / 4; t1->seq = htonl(seq); t1->ack_seq = htonl(ack); - t1->ack = 1; + t1->ack = !rst || !th->ack; + t1->rst = rst; t1->window = htons(win); topt = (__be32 *)(t1 + 1); @@ -1087,7 +986,7 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 *topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP); *topt++ = htonl(tcp_time_stamp); - *topt = htonl(ts); + *topt++ = htonl(ts); } #ifdef CONFIG_TCP_MD5SIG @@ -1116,10 +1015,16 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 fl.fl_ip_sport = t1->source; security_skb_classify_flow(skb, &fl); + /* Pass a socket to ip6_dst_lookup either it is for RST + * Underlying function will use this to retrieve the network + * namespace + */ if (!ip6_dst_lookup(ctl_sk, &buff->dst, &fl)) { if (xfrm_lookup(&buff->dst, &fl, NULL, 0) >= 0) { ip6_xmit(ctl_sk, buff, &fl, NULL, 0); TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); + if (rst) + TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); return; } } @@ -1127,6 +1032,38 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 kfree_skb(buff); } +static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb) +{ + struct tcphdr *th = tcp_hdr(skb); + u32 seq = 0, ack_seq = 0; + struct tcp_md5sig_key *key = NULL; + + if (th->rst) + return; + + if (!ipv6_unicast_destination(skb)) + return; + +#ifdef CONFIG_TCP_MD5SIG + if (sk) + key = tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr); +#endif + + if (th->ack) + seq = ntohl(th->ack_seq); + else + ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len - + (th->doff << 2); + + tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1); +} + +static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts, + struct tcp_md5sig_key *key) +{ + tcp_v6_send_response(skb, seq, ack, win, ts, key, 0); +} + static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb) { struct inet_timewait_sock *tw = inet_twsk(sk); @@ -1286,7 +1223,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, struct request_sock *req, struct dst_entry *dst) { - struct inet6_request_sock *treq = inet6_rsk(req); + struct inet6_request_sock *treq; struct ipv6_pinfo *newnp, *np = inet6_sk(sk); struct tcp6_sock *newtcp6sk; struct inet_sock *newinet; @@ -1350,6 +1287,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, return newsk; } + treq = inet6_rsk(req); opt = np->opt; if (sk_acceptq_is_full(sk)) @@ -1680,11 +1618,7 @@ static int tcp_v6_rcv(struct sk_buff *skb) TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(ipv6_hdr(skb)); TCP_SKB_CB(skb)->sacked = 0; - sk = __inet6_lookup(net, &tcp_hashinfo, - &ipv6_hdr(skb)->saddr, th->source, - &ipv6_hdr(skb)->daddr, ntohs(th->dest), - inet6_iif(skb)); - + sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest); if (!sk) goto no_tcp_socket;