Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1 | /* |
| 2 | * DCCP over IPv6 |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 3 | * Linux INET6 implementation |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 4 | * |
| 5 | * Based on net/dccp6/ipv6.c |
| 6 | * |
| 7 | * Arnaldo Carvalho de Melo <acme@ghostprotocols.net> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | */ |
| 14 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 18 | #include <linux/xfrm.h> |
| 19 | |
| 20 | #include <net/addrconf.h> |
| 21 | #include <net/inet_common.h> |
| 22 | #include <net/inet_hashtables.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 23 | #include <net/inet_sock.h> |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 24 | #include <net/inet6_connection_sock.h> |
| 25 | #include <net/inet6_hashtables.h> |
| 26 | #include <net/ip6_route.h> |
| 27 | #include <net/ipv6.h> |
| 28 | #include <net/protocol.h> |
| 29 | #include <net/transp_v6.h> |
David S. Miller | aa0e4e4 | 2006-01-06 22:55:39 -0800 | [diff] [blame] | 30 | #include <net/ip6_checksum.h> |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 31 | #include <net/xfrm.h> |
David S. Miller | 6e5714e | 2011-08-03 20:50:44 -0700 | [diff] [blame] | 32 | #include <net/secure_seq.h> |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 33 | |
| 34 | #include "dccp.h" |
| 35 | #include "ipv6.h" |
Ian McDonald | 4b79f0a | 2006-07-23 23:33:28 -0700 | [diff] [blame] | 36 | #include "feat.h" |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 37 | |
Pavel Emelyanov | 13f51d8 | 2008-04-14 02:38:45 -0700 | [diff] [blame] | 38 | /* The per-net dccp.v6_ctl_sk is used for sending RSTs and ACKs */ |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 39 | |
Stephen Hemminger | 3b401a8 | 2009-09-01 19:25:04 +0000 | [diff] [blame] | 40 | static const struct inet_connection_sock_af_ops dccp_ipv6_mapped; |
| 41 | static const struct inet_connection_sock_af_ops dccp_ipv6_af_ops; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 42 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 43 | static void dccp_v6_hash(struct sock *sk) |
| 44 | { |
| 45 | if (sk->sk_state != DCCP_CLOSED) { |
| 46 | if (inet_csk(sk)->icsk_af_ops == &dccp_ipv6_mapped) { |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 47 | inet_hash(sk); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 48 | return; |
| 49 | } |
| 50 | local_bh_disable(); |
Eric Dumazet | 9327f70 | 2009-12-04 03:46:54 +0000 | [diff] [blame] | 51 | __inet6_hash(sk, NULL); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 52 | local_bh_enable(); |
| 53 | } |
| 54 | } |
| 55 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 56 | /* add pseudo-header to DCCP checksum stored in skb->csum */ |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 57 | static inline __sum16 dccp_v6_csum_finish(struct sk_buff *skb, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 58 | const struct in6_addr *saddr, |
| 59 | const struct in6_addr *daddr) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 60 | { |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 61 | return csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_DCCP, skb->csum); |
| 62 | } |
| 63 | |
Herbert Xu | bb29624 | 2010-04-11 02:15:55 +0000 | [diff] [blame] | 64 | static inline void dccp_v6_send_check(struct sock *sk, struct sk_buff *skb) |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 65 | { |
| 66 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 67 | struct dccp_hdr *dh = dccp_hdr(skb); |
| 68 | |
| 69 | dccp_csum_outgoing(skb); |
| 70 | dh->dccph_checksum = dccp_v6_csum_finish(skb, &np->saddr, &np->daddr); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 71 | } |
| 72 | |
David S. Miller | 6e5714e | 2011-08-03 20:50:44 -0700 | [diff] [blame] | 73 | static inline __u64 dccp_v6_init_sequence(struct sk_buff *skb) |
Gerrit Renker | d7f7365 | 2006-11-13 13:34:38 -0200 | [diff] [blame] | 74 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 75 | return secure_dccpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32, |
| 76 | ipv6_hdr(skb)->saddr.s6_addr32, |
Gerrit Renker | d7f7365 | 2006-11-13 13:34:38 -0200 | [diff] [blame] | 77 | dccp_hdr(skb)->dccph_dport, |
| 78 | dccp_hdr(skb)->dccph_sport ); |
| 79 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 80 | } |
| 81 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 82 | static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 83 | u8 type, u8 code, int offset, __be32 info) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 84 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 85 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 86 | const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset); |
Wei Yongjun | e0bcfb0 | 2008-07-26 11:59:10 +0100 | [diff] [blame] | 87 | struct dccp_sock *dp; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 88 | struct ipv6_pinfo *np; |
| 89 | struct sock *sk; |
| 90 | int err; |
| 91 | __u64 seq; |
Pavel Emelyanov | ca12a1a | 2008-07-16 20:28:42 -0700 | [diff] [blame] | 92 | struct net *net = dev_net(skb->dev); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 93 | |
Wei Yongjun | 860239c | 2008-07-26 11:59:11 +0100 | [diff] [blame] | 94 | if (skb->len < offset + sizeof(*dh) || |
| 95 | skb->len < offset + __dccp_basic_hdr_len(dh)) { |
Denis V. Lunev | e41b536 | 2008-10-08 10:33:26 -0700 | [diff] [blame] | 96 | ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), |
| 97 | ICMP6_MIB_INERRORS); |
Wei Yongjun | 860239c | 2008-07-26 11:59:11 +0100 | [diff] [blame] | 98 | return; |
| 99 | } |
| 100 | |
Pavel Emelyanov | ca12a1a | 2008-07-16 20:28:42 -0700 | [diff] [blame] | 101 | sk = inet6_lookup(net, &dccp_hashinfo, |
Pavel Emelyanov | 671a1c7 | 2008-04-13 22:33:06 -0700 | [diff] [blame] | 102 | &hdr->daddr, dh->dccph_dport, |
Pavel Emelyanov | d86e0da | 2008-01-31 05:07:21 -0800 | [diff] [blame] | 103 | &hdr->saddr, dh->dccph_sport, inet6_iif(skb)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 104 | |
| 105 | if (sk == NULL) { |
Denis V. Lunev | e41b536 | 2008-10-08 10:33:26 -0700 | [diff] [blame] | 106 | ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), |
| 107 | ICMP6_MIB_INERRORS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 108 | return; |
| 109 | } |
| 110 | |
| 111 | if (sk->sk_state == DCCP_TIME_WAIT) { |
YOSHIFUJI Hideaki | 9469c7b | 2006-10-10 19:41:46 -0700 | [diff] [blame] | 112 | inet_twsk_put(inet_twsk(sk)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 113 | return; |
| 114 | } |
| 115 | |
| 116 | bh_lock_sock(sk); |
| 117 | if (sock_owned_by_user(sk)) |
Pavel Emelyanov | de0744a | 2008-07-16 20:31:16 -0700 | [diff] [blame] | 118 | NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 119 | |
| 120 | if (sk->sk_state == DCCP_CLOSED) |
| 121 | goto out; |
| 122 | |
Wei Yongjun | e0bcfb0 | 2008-07-26 11:59:10 +0100 | [diff] [blame] | 123 | dp = dccp_sk(sk); |
| 124 | seq = dccp_hdr_seq(dh); |
| 125 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_LISTEN) && |
| 126 | !between48(seq, dp->dccps_awl, dp->dccps_awh)) { |
| 127 | NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); |
| 128 | goto out; |
| 129 | } |
| 130 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 131 | np = inet6_sk(sk); |
| 132 | |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 133 | if (type == NDISC_REDIRECT) { |
| 134 | struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie); |
| 135 | |
David S. Miller | 1ed5c48 | 2012-07-12 00:41:25 -0700 | [diff] [blame] | 136 | if (dst) |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 137 | dst->ops->redirect(dst, sk, skb); |
Duan Jiong | bd784a1 | 2013-09-18 20:03:27 +0800 | [diff] [blame] | 138 | goto out; |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 141 | if (type == ICMPV6_PKT_TOOBIG) { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 142 | struct dst_entry *dst = NULL; |
| 143 | |
| 144 | if (sock_owned_by_user(sk)) |
| 145 | goto out; |
| 146 | if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED)) |
| 147 | goto out; |
| 148 | |
David S. Miller | 35ad9b9 | 2012-07-16 03:44:56 -0700 | [diff] [blame] | 149 | dst = inet6_csk_update_pmtu(sk, ntohl(info)); |
| 150 | if (!dst) |
| 151 | goto out; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 152 | |
David S. Miller | 35ad9b9 | 2012-07-16 03:44:56 -0700 | [diff] [blame] | 153 | if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 154 | dccp_sync_mss(sk, dst_mtu(dst)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 155 | goto out; |
| 156 | } |
| 157 | |
| 158 | icmpv6_err_convert(type, code, &err); |
| 159 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 160 | /* Might be for an request_sock */ |
| 161 | switch (sk->sk_state) { |
| 162 | struct request_sock *req, **prev; |
| 163 | case DCCP_LISTEN: |
| 164 | if (sock_owned_by_user(sk)) |
| 165 | goto out; |
| 166 | |
| 167 | req = inet6_csk_search_req(sk, &prev, dh->dccph_dport, |
| 168 | &hdr->daddr, &hdr->saddr, |
| 169 | inet6_iif(skb)); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 170 | if (req == NULL) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 171 | goto out; |
| 172 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 173 | /* |
| 174 | * ICMPs are not backlogged, hence we cannot get an established |
| 175 | * socket here. |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 176 | */ |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 177 | WARN_ON(req->sk != NULL); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 178 | |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 179 | if (!between48(seq, dccp_rsk(req)->dreq_iss, |
| 180 | dccp_rsk(req)->dreq_gss)) { |
Pavel Emelyanov | de0744a | 2008-07-16 20:31:16 -0700 | [diff] [blame] | 181 | NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 182 | goto out; |
| 183 | } |
| 184 | |
| 185 | inet_csk_reqsk_queue_drop(sk, req, prev); |
| 186 | goto out; |
| 187 | |
| 188 | case DCCP_REQUESTING: |
| 189 | case DCCP_RESPOND: /* Cannot happen. |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 190 | It can, it SYNs are crossed. --ANK */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 191 | if (!sock_owned_by_user(sk)) { |
| 192 | DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS); |
| 193 | sk->sk_err = err; |
| 194 | /* |
| 195 | * Wake people up to see the error |
| 196 | * (see connect in sock.c) |
| 197 | */ |
| 198 | sk->sk_error_report(sk); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 199 | dccp_done(sk); |
| 200 | } else |
| 201 | sk->sk_err_soft = err; |
| 202 | goto out; |
| 203 | } |
| 204 | |
| 205 | if (!sock_owned_by_user(sk) && np->recverr) { |
| 206 | sk->sk_err = err; |
| 207 | sk->sk_error_report(sk); |
| 208 | } else |
| 209 | sk->sk_err_soft = err; |
| 210 | |
| 211 | out: |
| 212 | bh_unlock_sock(sk); |
| 213 | sock_put(sk); |
| 214 | } |
| 215 | |
| 216 | |
Christoph Paasch | 1a2c618 | 2013-03-17 08:23:34 +0000 | [diff] [blame] | 217 | static int dccp_v6_send_response(struct sock *sk, struct request_sock *req) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 218 | { |
| 219 | struct inet6_request_sock *ireq6 = inet6_rsk(req); |
| 220 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 221 | struct sk_buff *skb; |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 222 | struct in6_addr *final_p, final; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 223 | struct flowi6 fl6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 224 | int err = -1; |
Denis V. Lunev | fd80eb9 | 2008-02-29 11:43:03 -0800 | [diff] [blame] | 225 | struct dst_entry *dst; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 226 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 227 | memset(&fl6, 0, sizeof(fl6)); |
| 228 | fl6.flowi6_proto = IPPROTO_DCCP; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 229 | fl6.daddr = ireq6->rmt_addr; |
| 230 | fl6.saddr = ireq6->loc_addr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 231 | fl6.flowlabel = 0; |
| 232 | fl6.flowi6_oif = ireq6->iif; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 233 | fl6.fl6_dport = inet_rsk(req)->rmt_port; |
| 234 | fl6.fl6_sport = inet_rsk(req)->loc_port; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 235 | security_req_classify_flow(req, flowi6_to_flowi(&fl6)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 236 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 237 | |
RongQing.Li | 0979e46 | 2012-07-01 17:19:00 +0000 | [diff] [blame] | 238 | final_p = fl6_update_dst(&fl6, np->opt, &final); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 239 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 240 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 241 | if (IS_ERR(dst)) { |
| 242 | err = PTR_ERR(dst); |
| 243 | dst = NULL; |
Denis V. Lunev | fd80eb9 | 2008-02-29 11:43:03 -0800 | [diff] [blame] | 244 | goto done; |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 245 | } |
Denis V. Lunev | fd80eb9 | 2008-02-29 11:43:03 -0800 | [diff] [blame] | 246 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 247 | skb = dccp_make_response(sk, dst, req); |
| 248 | if (skb != NULL) { |
| 249 | struct dccp_hdr *dh = dccp_hdr(skb); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 250 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 251 | dh->dccph_checksum = dccp_v6_csum_finish(skb, |
| 252 | &ireq6->loc_addr, |
| 253 | &ireq6->rmt_addr); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 254 | fl6.daddr = ireq6->rmt_addr; |
RongQing.Li | 0979e46 | 2012-07-01 17:19:00 +0000 | [diff] [blame] | 255 | err = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); |
Gerrit Renker | b9df3cb | 2006-11-14 11:21:36 -0200 | [diff] [blame] | 256 | err = net_xmit_eval(err); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | done: |
David S. Miller | 0cbd782 | 2006-01-31 17:53:37 -0800 | [diff] [blame] | 260 | dst_release(dst); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 261 | return err; |
| 262 | } |
| 263 | |
| 264 | static void dccp_v6_reqsk_destructor(struct request_sock *req) |
| 265 | { |
Gerrit Renker | d99a7bd | 2008-11-04 23:56:30 -0800 | [diff] [blame] | 266 | dccp_feat_list_purge(&dccp_rsk(req)->dreq_featneg); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 267 | if (inet6_rsk(req)->pktopts != NULL) |
| 268 | kfree_skb(inet6_rsk(req)->pktopts); |
| 269 | } |
| 270 | |
YOSHIFUJI Hideaki | cfb6eeb | 2006-11-14 19:07:45 -0800 | [diff] [blame] | 271 | static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 272 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 273 | const struct ipv6hdr *rxip6h; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 274 | struct sk_buff *skb; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 275 | struct flowi6 fl6; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 276 | struct net *net = dev_net(skb_dst(rxskb)->dev); |
Pavel Emelyanov | 334527d | 2008-04-13 22:32:45 -0700 | [diff] [blame] | 277 | struct sock *ctl_sk = net->dccp.v6_ctl_sk; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 278 | struct dst_entry *dst; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 279 | |
Gerrit Renker | e356d37 | 2007-09-26 14:35:19 -0300 | [diff] [blame] | 280 | if (dccp_hdr(rxskb)->dccph_type == DCCP_PKT_RESET) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 281 | return; |
| 282 | |
| 283 | if (!ipv6_unicast_destination(rxskb)) |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 284 | return; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 285 | |
Pavel Emelyanov | 0204774 | 2008-04-13 22:32:25 -0700 | [diff] [blame] | 286 | skb = dccp_ctl_make_reset(ctl_sk, rxskb); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 287 | if (skb == NULL) |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 288 | return; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 289 | |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 290 | rxip6h = ipv6_hdr(rxskb); |
Gerrit Renker | e356d37 | 2007-09-26 14:35:19 -0300 | [diff] [blame] | 291 | dccp_hdr(skb)->dccph_checksum = dccp_v6_csum_finish(skb, &rxip6h->saddr, |
| 292 | &rxip6h->daddr); |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 293 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 294 | memset(&fl6, 0, sizeof(fl6)); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 295 | fl6.daddr = rxip6h->saddr; |
| 296 | fl6.saddr = rxip6h->daddr; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 297 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 298 | fl6.flowi6_proto = IPPROTO_DCCP; |
| 299 | fl6.flowi6_oif = inet6_iif(rxskb); |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 300 | fl6.fl6_dport = dccp_hdr(skb)->dccph_dport; |
| 301 | fl6.fl6_sport = dccp_hdr(skb)->dccph_sport; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 302 | security_skb_classify_flow(rxskb, flowi6_to_flowi(&fl6)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 303 | |
| 304 | /* sk = NULL, but it is safe for now. RST socket required. */ |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 305 | dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 306 | if (!IS_ERR(dst)) { |
| 307 | skb_dst_set(skb, dst); |
Eric Dumazet | b903d32 | 2011-10-27 00:44:35 -0400 | [diff] [blame] | 308 | ip6_xmit(ctl_sk, skb, &fl6, NULL, 0); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 309 | DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS); |
| 310 | DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS); |
| 311 | return; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | kfree_skb(skb); |
| 315 | } |
| 316 | |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 317 | static struct request_sock_ops dccp6_request_sock_ops = { |
| 318 | .family = AF_INET6, |
| 319 | .obj_size = sizeof(struct dccp6_request_sock), |
| 320 | .rtx_syn_ack = dccp_v6_send_response, |
| 321 | .send_ack = dccp_reqsk_send_ack, |
| 322 | .destructor = dccp_v6_reqsk_destructor, |
| 323 | .send_reset = dccp_v6_ctl_send_reset, |
Eric Dumazet | c72e118 | 2012-04-12 22:16:05 +0000 | [diff] [blame] | 324 | .syn_ack_timeout = dccp_syn_ack_timeout, |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 325 | }; |
| 326 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 327 | static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb) |
| 328 | { |
| 329 | const struct dccp_hdr *dh = dccp_hdr(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 330 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 331 | struct sock *nsk; |
| 332 | struct request_sock **prev; |
| 333 | /* Find possible connection requests. */ |
| 334 | struct request_sock *req = inet6_csk_search_req(sk, &prev, |
| 335 | dh->dccph_sport, |
| 336 | &iph->saddr, |
| 337 | &iph->daddr, |
| 338 | inet6_iif(skb)); |
| 339 | if (req != NULL) |
| 340 | return dccp_check_req(sk, skb, req, prev); |
| 341 | |
Pavel Emelyanov | 671a1c7 | 2008-04-13 22:33:06 -0700 | [diff] [blame] | 342 | nsk = __inet6_lookup_established(sock_net(sk), &dccp_hashinfo, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 343 | &iph->saddr, dh->dccph_sport, |
| 344 | &iph->daddr, ntohs(dh->dccph_dport), |
| 345 | inet6_iif(skb)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 346 | if (nsk != NULL) { |
| 347 | if (nsk->sk_state != DCCP_TIME_WAIT) { |
| 348 | bh_lock_sock(nsk); |
| 349 | return nsk; |
| 350 | } |
YOSHIFUJI Hideaki | 9469c7b | 2006-10-10 19:41:46 -0700 | [diff] [blame] | 351 | inet_twsk_put(inet_twsk(nsk)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 352 | return NULL; |
| 353 | } |
| 354 | |
| 355 | return sk; |
| 356 | } |
| 357 | |
| 358 | static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb) |
| 359 | { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 360 | struct request_sock *req; |
| 361 | struct dccp_request_sock *dreq; |
| 362 | struct inet6_request_sock *ireq6; |
| 363 | struct ipv6_pinfo *np = inet6_sk(sk); |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 364 | const __be32 service = dccp_hdr_request(skb)->dccph_req_service; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 365 | struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 366 | |
| 367 | if (skb->protocol == htons(ETH_P_IP)) |
| 368 | return dccp_v4_conn_request(sk, skb); |
| 369 | |
| 370 | if (!ipv6_unicast_destination(skb)) |
Gerrit Renker | 4a5409a | 2007-10-04 14:52:28 -0700 | [diff] [blame] | 371 | return 0; /* discard, don't send a reset here */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 372 | |
| 373 | if (dccp_bad_service_code(sk, service)) { |
Gerrit Renker | 4a5409a | 2007-10-04 14:52:28 -0700 | [diff] [blame] | 374 | dcb->dccpd_reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 375 | goto drop; |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 376 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 377 | /* |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 378 | * There are no SYN attacks on IPv6, yet... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 379 | */ |
Gerrit Renker | 4a5409a | 2007-10-04 14:52:28 -0700 | [diff] [blame] | 380 | dcb->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 381 | if (inet_csk_reqsk_queue_is_full(sk)) |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 382 | goto drop; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 383 | |
| 384 | if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) |
| 385 | goto drop; |
| 386 | |
Gerrit Renker | 8270953 | 2006-10-11 16:26:54 +0100 | [diff] [blame] | 387 | req = inet6_reqsk_alloc(&dccp6_request_sock_ops); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 388 | if (req == NULL) |
| 389 | goto drop; |
| 390 | |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 391 | if (dccp_reqsk_init(req, dccp_sk(sk), skb)) |
| 392 | goto drop_and_free; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 393 | |
Gerrit Renker | 8b81941 | 2007-12-13 12:29:24 -0200 | [diff] [blame] | 394 | dreq = dccp_rsk(req); |
| 395 | if (dccp_parse_options(sk, dreq, skb)) |
| 396 | goto drop_and_free; |
| 397 | |
Venkat Yekkirala | 4237c75 | 2006-07-24 23:32:50 -0700 | [diff] [blame] | 398 | if (security_inet_conn_request(sk, skb, req)) |
| 399 | goto drop_and_free; |
| 400 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 401 | ireq6 = inet6_rsk(req); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 402 | ireq6->rmt_addr = ipv6_hdr(skb)->saddr; |
| 403 | ireq6->loc_addr = ipv6_hdr(skb)->daddr; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 404 | |
| 405 | if (ipv6_opt_accepted(sk, skb) || |
| 406 | np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo || |
| 407 | np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) { |
| 408 | atomic_inc(&skb->users); |
| 409 | ireq6->pktopts = skb; |
| 410 | } |
| 411 | ireq6->iif = sk->sk_bound_dev_if; |
| 412 | |
| 413 | /* So that link locals have meaning */ |
| 414 | if (!sk->sk_bound_dev_if && |
| 415 | ipv6_addr_type(&ireq6->rmt_addr) & IPV6_ADDR_LINKLOCAL) |
| 416 | ireq6->iif = inet6_iif(skb); |
| 417 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 418 | /* |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 419 | * Step 3: Process LISTEN state |
| 420 | * |
Gerrit Renker | d83ca5a | 2006-11-10 16:29:14 -0200 | [diff] [blame] | 421 | * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 422 | * |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 423 | * Setting S.SWL/S.SWH to is deferred to dccp_create_openreq_child(). |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 424 | */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 425 | dreq->dreq_isr = dcb->dccpd_seq; |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 426 | dreq->dreq_gsr = dreq->dreq_isr; |
Gerrit Renker | 865e902 | 2006-11-13 13:31:50 -0200 | [diff] [blame] | 427 | dreq->dreq_iss = dccp_v6_init_sequence(skb); |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 428 | dreq->dreq_gss = dreq->dreq_iss; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 429 | dreq->dreq_service = service; |
| 430 | |
Christoph Paasch | 1a2c618 | 2013-03-17 08:23:34 +0000 | [diff] [blame] | 431 | if (dccp_v6_send_response(sk, req)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 432 | goto drop_and_free; |
| 433 | |
| 434 | inet6_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT); |
| 435 | return 0; |
| 436 | |
| 437 | drop_and_free: |
| 438 | reqsk_free(req); |
| 439 | drop: |
| 440 | DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 441 | return -1; |
| 442 | } |
| 443 | |
| 444 | static struct sock *dccp_v6_request_recv_sock(struct sock *sk, |
| 445 | struct sk_buff *skb, |
| 446 | struct request_sock *req, |
| 447 | struct dst_entry *dst) |
| 448 | { |
| 449 | struct inet6_request_sock *ireq6 = inet6_rsk(req); |
| 450 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); |
| 451 | struct inet_sock *newinet; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 452 | struct dccp6_sock *newdp6; |
| 453 | struct sock *newsk; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 454 | |
| 455 | if (skb->protocol == htons(ETH_P_IP)) { |
| 456 | /* |
| 457 | * v6 mapped |
| 458 | */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 459 | newsk = dccp_v4_request_recv_sock(sk, skb, req, dst); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 460 | if (newsk == NULL) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 461 | return NULL; |
| 462 | |
| 463 | newdp6 = (struct dccp6_sock *)newsk; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 464 | newinet = inet_sk(newsk); |
| 465 | newinet->pinet6 = &newdp6->inet6; |
| 466 | newnp = inet6_sk(newsk); |
| 467 | |
| 468 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); |
| 469 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 470 | ipv6_addr_set_v4mapped(newinet->inet_daddr, &newnp->daddr); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 471 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 472 | ipv6_addr_set_v4mapped(newinet->inet_saddr, &newnp->saddr); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 473 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 474 | newnp->rcv_saddr = newnp->saddr; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 475 | |
| 476 | inet_csk(newsk)->icsk_af_ops = &dccp_ipv6_mapped; |
| 477 | newsk->sk_backlog_rcv = dccp_v4_do_rcv; |
| 478 | newnp->pktoptions = NULL; |
| 479 | newnp->opt = NULL; |
| 480 | newnp->mcast_oif = inet6_iif(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 481 | newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 482 | |
| 483 | /* |
| 484 | * No need to charge this sock to the relevant IPv6 refcnt debug socks count |
| 485 | * here, dccp_create_openreq_child now does this for us, see the comment in |
| 486 | * that function for the gory details. -acme |
| 487 | */ |
| 488 | |
| 489 | /* It is tricky place. Until this moment IPv4 tcp |
| 490 | worked with IPv6 icsk.icsk_af_ops. |
| 491 | Sync it now. |
| 492 | */ |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 493 | dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 494 | |
| 495 | return newsk; |
| 496 | } |
| 497 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 498 | |
| 499 | if (sk_acceptq_is_full(sk)) |
| 500 | goto out_overflow; |
| 501 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 502 | if (dst == NULL) { |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 503 | struct in6_addr *final_p, final; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 504 | struct flowi6 fl6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 505 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 506 | memset(&fl6, 0, sizeof(fl6)); |
| 507 | fl6.flowi6_proto = IPPROTO_DCCP; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 508 | fl6.daddr = ireq6->rmt_addr; |
RongQing.Li | 0979e46 | 2012-07-01 17:19:00 +0000 | [diff] [blame] | 509 | final_p = fl6_update_dst(&fl6, np->opt, &final); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 510 | fl6.saddr = ireq6->loc_addr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 511 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 512 | fl6.fl6_dport = inet_rsk(req)->rmt_port; |
| 513 | fl6.fl6_sport = inet_rsk(req)->loc_port; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 514 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 515 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 516 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 517 | if (IS_ERR(dst)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 518 | goto out; |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 519 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 520 | |
| 521 | newsk = dccp_create_openreq_child(sk, req, skb); |
| 522 | if (newsk == NULL) |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 523 | goto out_nonewsk; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 524 | |
| 525 | /* |
| 526 | * No need to charge this sock to the relevant IPv6 refcnt debug socks |
| 527 | * count here, dccp_create_openreq_child now does this for us, see the |
| 528 | * comment in that function for the gory details. -acme |
| 529 | */ |
| 530 | |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 531 | __ip6_dst_store(newsk, dst, NULL, NULL); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 532 | newsk->sk_route_caps = dst->dev->features & ~(NETIF_F_IP_CSUM | |
| 533 | NETIF_F_TSO); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 534 | newdp6 = (struct dccp6_sock *)newsk; |
| 535 | newinet = inet_sk(newsk); |
| 536 | newinet->pinet6 = &newdp6->inet6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 537 | newnp = inet6_sk(newsk); |
| 538 | |
| 539 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); |
| 540 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 541 | newnp->daddr = ireq6->rmt_addr; |
| 542 | newnp->saddr = ireq6->loc_addr; |
| 543 | newnp->rcv_saddr = ireq6->loc_addr; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 544 | newsk->sk_bound_dev_if = ireq6->iif; |
| 545 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 546 | /* Now IPv6 options... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 547 | |
| 548 | First: no IPv4 options. |
| 549 | */ |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 550 | newinet->inet_opt = NULL; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 551 | |
| 552 | /* Clone RX bits */ |
| 553 | newnp->rxopt.all = np->rxopt.all; |
| 554 | |
| 555 | /* Clone pktoptions received with SYN */ |
| 556 | newnp->pktoptions = NULL; |
| 557 | if (ireq6->pktopts != NULL) { |
| 558 | newnp->pktoptions = skb_clone(ireq6->pktopts, GFP_ATOMIC); |
Eric Dumazet | 7604adc | 2012-04-19 02:24:48 +0000 | [diff] [blame] | 559 | consume_skb(ireq6->pktopts); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 560 | ireq6->pktopts = NULL; |
| 561 | if (newnp->pktoptions) |
| 562 | skb_set_owner_r(newnp->pktoptions, newsk); |
| 563 | } |
| 564 | newnp->opt = NULL; |
| 565 | newnp->mcast_oif = inet6_iif(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 566 | newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 567 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 568 | /* |
| 569 | * Clone native IPv6 options from listening socket (if any) |
| 570 | * |
| 571 | * Yes, keeping reference count would be much more clever, but we make |
| 572 | * one more one thing there: reattach optmem to newsk. |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 573 | */ |
RongQing.Li | 0979e46 | 2012-07-01 17:19:00 +0000 | [diff] [blame] | 574 | if (np->opt != NULL) |
| 575 | newnp->opt = ipv6_dup_options(newsk, np->opt); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 576 | |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 577 | inet_csk(newsk)->icsk_ext_hdr_len = 0; |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 578 | if (newnp->opt != NULL) |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 579 | inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen + |
| 580 | newnp->opt->opt_flen); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 581 | |
| 582 | dccp_sync_mss(newsk, dst_mtu(dst)); |
| 583 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 584 | newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6; |
| 585 | newinet->inet_rcv_saddr = LOOPBACK4_IPV6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 586 | |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 587 | if (__inet_inherit_port(sk, newsk) < 0) { |
Christoph Paasch | e337e24 | 2012-12-14 04:07:58 +0000 | [diff] [blame] | 588 | inet_csk_prepare_forced_close(newsk); |
| 589 | dccp_done(newsk); |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 590 | goto out; |
| 591 | } |
Eric Dumazet | 9327f70 | 2009-12-04 03:46:54 +0000 | [diff] [blame] | 592 | __inet6_hash(newsk, NULL); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 593 | |
| 594 | return newsk; |
| 595 | |
| 596 | out_overflow: |
Pavel Emelyanov | de0744a | 2008-07-16 20:31:16 -0700 | [diff] [blame] | 597 | NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS); |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 598 | out_nonewsk: |
| 599 | dst_release(dst); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 600 | out: |
Pavel Emelyanov | de0744a | 2008-07-16 20:31:16 -0700 | [diff] [blame] | 601 | NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 602 | return NULL; |
| 603 | } |
| 604 | |
| 605 | /* The socket must have it's spinlock held when we get |
| 606 | * here. |
| 607 | * |
| 608 | * We have a potential double-lock case here, so even when |
| 609 | * doing backlog processing we use the BH locking scheme. |
| 610 | * This is because we cannot sleep with the original spinlock |
| 611 | * held. |
| 612 | */ |
| 613 | static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) |
| 614 | { |
| 615 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 616 | struct sk_buff *opt_skb = NULL; |
| 617 | |
| 618 | /* Imagine: socket is IPv6. IPv4 packet arrives, |
| 619 | goes to IPv4 receive handler and backlogged. |
| 620 | From backlog it always goes here. Kerboom... |
| 621 | Fortunately, dccp_rcv_established and rcv_established |
| 622 | handle them correctly, but it is not case with |
| 623 | dccp_v6_hnd_req and dccp_v6_ctl_send_reset(). --ANK |
| 624 | */ |
| 625 | |
| 626 | if (skb->protocol == htons(ETH_P_IP)) |
| 627 | return dccp_v4_do_rcv(sk, skb); |
| 628 | |
Dmitry Mishin | fda9ef5 | 2006-08-31 15:28:39 -0700 | [diff] [blame] | 629 | if (sk_filter(sk, skb)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 630 | goto discard; |
| 631 | |
| 632 | /* |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 633 | * socket locking is here for SMP purposes as backlog rcv is currently |
| 634 | * called with bh processing disabled. |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 635 | */ |
| 636 | |
| 637 | /* Do Stevens' IPV6_PKTOPTIONS. |
| 638 | |
| 639 | Yes, guys, it is the only place in our code, where we |
| 640 | may make it not affecting IPv4. |
| 641 | The rest of code is protocol independent, |
| 642 | and I do not like idea to uglify IPv4. |
| 643 | |
| 644 | Actually, all the idea behind IPV6_PKTOPTIONS |
| 645 | looks not very well thought. For now we latch |
| 646 | options, received in the last packet, enqueued |
| 647 | by tcp. Feel free to propose better solution. |
YOSHIFUJI Hideaki | c9eaf17 | 2007-02-09 23:24:38 +0900 | [diff] [blame] | 648 | --ANK (980728) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 649 | */ |
| 650 | if (np->rxopt.all) |
Gerrit Renker | 89e7e57 | 2006-11-10 11:13:33 -0200 | [diff] [blame] | 651 | /* |
| 652 | * FIXME: Add handling of IPV6_PKTOPTIONS skb. See the comments below |
| 653 | * (wrt ipv6_pktopions) and net/ipv6/tcp_ipv6.c for an example. |
| 654 | */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 655 | opt_skb = skb_clone(skb, GFP_ATOMIC); |
| 656 | |
| 657 | if (sk->sk_state == DCCP_OPEN) { /* Fast path */ |
| 658 | if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len)) |
| 659 | goto reset; |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 660 | if (opt_skb) { |
Gerrit Renker | 89e7e57 | 2006-11-10 11:13:33 -0200 | [diff] [blame] | 661 | /* XXX This is where we would goto ipv6_pktoptions. */ |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 662 | __kfree_skb(opt_skb); |
| 663 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 664 | return 0; |
| 665 | } |
| 666 | |
Gerrit Renker | d83ca5a | 2006-11-10 16:29:14 -0200 | [diff] [blame] | 667 | /* |
| 668 | * Step 3: Process LISTEN state |
| 669 | * If S.state == LISTEN, |
| 670 | * If P.type == Request or P contains a valid Init Cookie option, |
| 671 | * (* Must scan the packet's options to check for Init |
| 672 | * Cookies. Only Init Cookies are processed here, |
| 673 | * however; other options are processed in Step 8. This |
| 674 | * scan need only be performed if the endpoint uses Init |
| 675 | * Cookies *) |
| 676 | * (* Generate a new socket and switch to that socket *) |
| 677 | * Set S := new socket for this port pair |
| 678 | * S.state = RESPOND |
| 679 | * Choose S.ISS (initial seqno) or set from Init Cookies |
| 680 | * Initialize S.GAR := S.ISS |
| 681 | * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookies |
| 682 | * Continue with S.state == RESPOND |
| 683 | * (* A Response packet will be generated in Step 11 *) |
| 684 | * Otherwise, |
| 685 | * Generate Reset(No Connection) unless P.type == Reset |
| 686 | * Drop packet and return |
| 687 | * |
| 688 | * NOTE: the check for the packet types is done in |
| 689 | * dccp_rcv_state_process |
| 690 | */ |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 691 | if (sk->sk_state == DCCP_LISTEN) { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 692 | struct sock *nsk = dccp_v6_hnd_req(sk, skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 693 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 694 | if (nsk == NULL) |
| 695 | goto discard; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 696 | /* |
| 697 | * Queue it on the new socket if the new socket is active, |
| 698 | * otherwise we just shortcircuit this and continue with |
| 699 | * the new socket.. |
| 700 | */ |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 701 | if (nsk != sk) { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 702 | if (dccp_child_process(sk, nsk, skb)) |
| 703 | goto reset; |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 704 | if (opt_skb != NULL) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 705 | __kfree_skb(opt_skb); |
| 706 | return 0; |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len)) |
| 711 | goto reset; |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 712 | if (opt_skb) { |
Gerrit Renker | 89e7e57 | 2006-11-10 11:13:33 -0200 | [diff] [blame] | 713 | /* XXX This is where we would goto ipv6_pktoptions. */ |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 714 | __kfree_skb(opt_skb); |
| 715 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 716 | return 0; |
| 717 | |
| 718 | reset: |
YOSHIFUJI Hideaki | cfb6eeb | 2006-11-14 19:07:45 -0800 | [diff] [blame] | 719 | dccp_v6_ctl_send_reset(sk, skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 720 | discard: |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 721 | if (opt_skb != NULL) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 722 | __kfree_skb(opt_skb); |
| 723 | kfree_skb(skb); |
| 724 | return 0; |
| 725 | } |
| 726 | |
Herbert Xu | e5bbef2 | 2007-10-15 12:50:28 -0700 | [diff] [blame] | 727 | static int dccp_v6_rcv(struct sk_buff *skb) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 728 | { |
| 729 | const struct dccp_hdr *dh; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 730 | struct sock *sk; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 731 | int min_cov; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 732 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 733 | /* Step 1: Check header basics */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 734 | |
| 735 | if (dccp_invalid_packet(skb)) |
| 736 | goto discard_it; |
| 737 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 738 | /* Step 1: If header checksum is incorrect, drop packet and return. */ |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 739 | if (dccp_v6_csum_finish(skb, &ipv6_hdr(skb)->saddr, |
| 740 | &ipv6_hdr(skb)->daddr)) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 741 | DCCP_WARN("dropped packet with invalid checksum\n"); |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 742 | goto discard_it; |
| 743 | } |
| 744 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 745 | dh = dccp_hdr(skb); |
| 746 | |
Gerrit Renker | fde2010 | 2007-10-24 10:12:09 -0200 | [diff] [blame] | 747 | DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 748 | DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type; |
| 749 | |
| 750 | if (dccp_packet_without_ack(skb)) |
| 751 | DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ; |
| 752 | else |
| 753 | DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb); |
| 754 | |
| 755 | /* Step 2: |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 756 | * Look up flow ID in table and get corresponding socket */ |
Arnaldo Carvalho de Melo | 9a1f27c | 2008-10-07 11:41:57 -0700 | [diff] [blame] | 757 | sk = __inet6_lookup_skb(&dccp_hashinfo, skb, |
| 758 | dh->dccph_sport, dh->dccph_dport); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 759 | /* |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 760 | * Step 2: |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 761 | * If no socket ... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 762 | */ |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 763 | if (sk == NULL) { |
| 764 | dccp_pr_debug("failed to look up flow ID in table and " |
| 765 | "get corresponding socket\n"); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 766 | goto no_dccp_socket; |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 767 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 768 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 769 | /* |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 770 | * Step 2: |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 771 | * ... or S.state == TIMEWAIT, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 772 | * Generate Reset(No Connection) unless P.type == Reset |
| 773 | * Drop packet and return |
| 774 | */ |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 775 | if (sk->sk_state == DCCP_TIME_WAIT) { |
| 776 | dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: do_time_wait\n"); |
| 777 | inet_twsk_put(inet_twsk(sk)); |
| 778 | goto no_dccp_socket; |
| 779 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 780 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 781 | /* |
| 782 | * RFC 4340, sec. 9.2.1: Minimum Checksum Coverage |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 783 | * o if MinCsCov = 0, only packets with CsCov = 0 are accepted |
| 784 | * o if MinCsCov > 0, also accept packets with CsCov >= MinCsCov |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 785 | */ |
| 786 | min_cov = dccp_sk(sk)->dccps_pcrlen; |
| 787 | if (dh->dccph_cscov && (min_cov == 0 || dh->dccph_cscov < min_cov)) { |
| 788 | dccp_pr_debug("Packet CsCov %d does not satisfy MinCsCov %d\n", |
| 789 | dh->dccph_cscov, min_cov); |
| 790 | /* FIXME: send Data Dropped option (see also dccp_v4_rcv) */ |
| 791 | goto discard_and_relse; |
| 792 | } |
| 793 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 794 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
| 795 | goto discard_and_relse; |
| 796 | |
Arnaldo Carvalho de Melo | 58a5a7b | 2006-11-16 14:06:06 -0200 | [diff] [blame] | 797 | return sk_receive_skb(sk, skb, 1) ? -1 : 0; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 798 | |
| 799 | no_dccp_socket: |
| 800 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| 801 | goto discard_it; |
| 802 | /* |
| 803 | * Step 2: |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 804 | * If no socket ... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 805 | * Generate Reset(No Connection) unless P.type == Reset |
| 806 | * Drop packet and return |
| 807 | */ |
| 808 | if (dh->dccph_type != DCCP_PKT_RESET) { |
| 809 | DCCP_SKB_CB(skb)->dccpd_reset_code = |
| 810 | DCCP_RESET_CODE_NO_CONNECTION; |
YOSHIFUJI Hideaki | cfb6eeb | 2006-11-14 19:07:45 -0800 | [diff] [blame] | 811 | dccp_v6_ctl_send_reset(sk, skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 812 | } |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 813 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 814 | discard_it: |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 815 | kfree_skb(skb); |
| 816 | return 0; |
| 817 | |
| 818 | discard_and_relse: |
| 819 | sock_put(sk); |
| 820 | goto discard_it; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 821 | } |
| 822 | |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 823 | static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, |
| 824 | int addr_len) |
| 825 | { |
| 826 | struct sockaddr_in6 *usin = (struct sockaddr_in6 *)uaddr; |
| 827 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 828 | struct inet_sock *inet = inet_sk(sk); |
| 829 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 830 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 831 | struct in6_addr *saddr = NULL, *final_p, final; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 832 | struct flowi6 fl6; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 833 | struct dst_entry *dst; |
| 834 | int addr_type; |
| 835 | int err; |
| 836 | |
| 837 | dp->dccps_role = DCCP_ROLE_CLIENT; |
| 838 | |
| 839 | if (addr_len < SIN6_LEN_RFC2133) |
| 840 | return -EINVAL; |
| 841 | |
| 842 | if (usin->sin6_family != AF_INET6) |
| 843 | return -EAFNOSUPPORT; |
| 844 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 845 | memset(&fl6, 0, sizeof(fl6)); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 846 | |
| 847 | if (np->sndflow) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 848 | fl6.flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; |
| 849 | IP6_ECN_flow_init(fl6.flowlabel); |
| 850 | if (fl6.flowlabel & IPV6_FLOWLABEL_MASK) { |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 851 | struct ip6_flowlabel *flowlabel; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 852 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 853 | if (flowlabel == NULL) |
| 854 | return -EINVAL; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 855 | usin->sin6_addr = flowlabel->dst; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 856 | fl6_sock_release(flowlabel); |
| 857 | } |
| 858 | } |
| 859 | /* |
| 860 | * connect() to INADDR_ANY means loopback (BSD'ism). |
| 861 | */ |
| 862 | if (ipv6_addr_any(&usin->sin6_addr)) |
| 863 | usin->sin6_addr.s6_addr[15] = 1; |
| 864 | |
| 865 | addr_type = ipv6_addr_type(&usin->sin6_addr); |
| 866 | |
| 867 | if (addr_type & IPV6_ADDR_MULTICAST) |
| 868 | return -ENETUNREACH; |
| 869 | |
| 870 | if (addr_type & IPV6_ADDR_LINKLOCAL) { |
| 871 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 872 | usin->sin6_scope_id) { |
| 873 | /* If interface is set while binding, indices |
| 874 | * must coincide. |
| 875 | */ |
| 876 | if (sk->sk_bound_dev_if && |
| 877 | sk->sk_bound_dev_if != usin->sin6_scope_id) |
| 878 | return -EINVAL; |
| 879 | |
| 880 | sk->sk_bound_dev_if = usin->sin6_scope_id; |
| 881 | } |
| 882 | |
| 883 | /* Connect to link-local address requires an interface */ |
| 884 | if (!sk->sk_bound_dev_if) |
| 885 | return -EINVAL; |
| 886 | } |
| 887 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 888 | np->daddr = usin->sin6_addr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 889 | np->flow_label = fl6.flowlabel; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 890 | |
| 891 | /* |
| 892 | * DCCP over IPv4 |
| 893 | */ |
| 894 | if (addr_type == IPV6_ADDR_MAPPED) { |
| 895 | u32 exthdrlen = icsk->icsk_ext_hdr_len; |
| 896 | struct sockaddr_in sin; |
| 897 | |
| 898 | SOCK_DEBUG(sk, "connect: ipv4 mapped\n"); |
| 899 | |
| 900 | if (__ipv6_only_sock(sk)) |
| 901 | return -ENETUNREACH; |
| 902 | |
| 903 | sin.sin_family = AF_INET; |
| 904 | sin.sin_port = usin->sin6_port; |
| 905 | sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3]; |
| 906 | |
| 907 | icsk->icsk_af_ops = &dccp_ipv6_mapped; |
| 908 | sk->sk_backlog_rcv = dccp_v4_do_rcv; |
| 909 | |
| 910 | err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin)); |
| 911 | if (err) { |
| 912 | icsk->icsk_ext_hdr_len = exthdrlen; |
| 913 | icsk->icsk_af_ops = &dccp_ipv6_af_ops; |
| 914 | sk->sk_backlog_rcv = dccp_v6_do_rcv; |
| 915 | goto failure; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 916 | } |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 917 | ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); |
| 918 | ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, &np->rcv_saddr); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 919 | |
| 920 | return err; |
| 921 | } |
| 922 | |
| 923 | if (!ipv6_addr_any(&np->rcv_saddr)) |
| 924 | saddr = &np->rcv_saddr; |
| 925 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 926 | fl6.flowi6_proto = IPPROTO_DCCP; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 927 | fl6.daddr = np->daddr; |
| 928 | fl6.saddr = saddr ? *saddr : np->saddr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 929 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 930 | fl6.fl6_dport = usin->sin6_port; |
| 931 | fl6.fl6_sport = inet->inet_sport; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 932 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 933 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 934 | final_p = fl6_update_dst(&fl6, np->opt, &final); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 935 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 936 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 937 | if (IS_ERR(dst)) { |
| 938 | err = PTR_ERR(dst); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 939 | goto failure; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 940 | } |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 941 | |
| 942 | if (saddr == NULL) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 943 | saddr = &fl6.saddr; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 944 | np->rcv_saddr = *saddr; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | /* set the source address */ |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 948 | np->saddr = *saddr; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 949 | inet->inet_rcv_saddr = LOOPBACK4_IPV6; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 950 | |
| 951 | __ip6_dst_store(sk, dst, NULL, NULL); |
| 952 | |
| 953 | icsk->icsk_ext_hdr_len = 0; |
| 954 | if (np->opt != NULL) |
| 955 | icsk->icsk_ext_hdr_len = (np->opt->opt_flen + |
| 956 | np->opt->opt_nflen); |
| 957 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 958 | inet->inet_dport = usin->sin6_port; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 959 | |
| 960 | dccp_set_state(sk, DCCP_REQUESTING); |
| 961 | err = inet6_hash_connect(&dccp_death_row, sk); |
| 962 | if (err) |
| 963 | goto late_failure; |
Gerrit Renker | d7f7365 | 2006-11-13 13:34:38 -0200 | [diff] [blame] | 964 | |
| 965 | dp->dccps_iss = secure_dccpv6_sequence_number(np->saddr.s6_addr32, |
| 966 | np->daddr.s6_addr32, |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 967 | inet->inet_sport, |
| 968 | inet->inet_dport); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 969 | err = dccp_connect(sk); |
| 970 | if (err) |
| 971 | goto late_failure; |
| 972 | |
| 973 | return 0; |
| 974 | |
| 975 | late_failure: |
| 976 | dccp_set_state(sk, DCCP_CLOSED); |
| 977 | __sk_dst_reset(sk); |
| 978 | failure: |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 979 | inet->inet_dport = 0; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 980 | sk->sk_route_caps = 0; |
| 981 | return err; |
| 982 | } |
| 983 | |
Stephen Hemminger | 3b401a8 | 2009-09-01 19:25:04 +0000 | [diff] [blame] | 984 | static const struct inet_connection_sock_af_ops dccp_ipv6_af_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 985 | .queue_xmit = inet6_csk_xmit, |
| 986 | .send_check = dccp_v6_send_check, |
| 987 | .rebuild_header = inet6_sk_rebuild_header, |
| 988 | .conn_request = dccp_v6_conn_request, |
| 989 | .syn_recv_sock = dccp_v6_request_recv_sock, |
| 990 | .net_header_len = sizeof(struct ipv6hdr), |
| 991 | .setsockopt = ipv6_setsockopt, |
| 992 | .getsockopt = ipv6_getsockopt, |
| 993 | .addr2sockaddr = inet6_csk_addr2sockaddr, |
| 994 | .sockaddr_len = sizeof(struct sockaddr_in6), |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 995 | .bind_conflict = inet6_csk_bind_conflict, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 996 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 997 | .compat_setsockopt = compat_ipv6_setsockopt, |
| 998 | .compat_getsockopt = compat_ipv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 999 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1000 | }; |
| 1001 | |
| 1002 | /* |
| 1003 | * DCCP over IPv4 via INET6 API |
| 1004 | */ |
Stephen Hemminger | 3b401a8 | 2009-09-01 19:25:04 +0000 | [diff] [blame] | 1005 | static const struct inet_connection_sock_af_ops dccp_ipv6_mapped = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1006 | .queue_xmit = ip_queue_xmit, |
| 1007 | .send_check = dccp_v4_send_check, |
| 1008 | .rebuild_header = inet_sk_rebuild_header, |
| 1009 | .conn_request = dccp_v6_conn_request, |
| 1010 | .syn_recv_sock = dccp_v6_request_recv_sock, |
| 1011 | .net_header_len = sizeof(struct iphdr), |
| 1012 | .setsockopt = ipv6_setsockopt, |
| 1013 | .getsockopt = ipv6_getsockopt, |
| 1014 | .addr2sockaddr = inet6_csk_addr2sockaddr, |
| 1015 | .sockaddr_len = sizeof(struct sockaddr_in6), |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1016 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1017 | .compat_setsockopt = compat_ipv6_setsockopt, |
| 1018 | .compat_getsockopt = compat_ipv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1019 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1020 | }; |
| 1021 | |
| 1022 | /* NOTE: A lot of things set to zero explicitly by call to |
| 1023 | * sk_alloc() so need not be done here. |
| 1024 | */ |
| 1025 | static int dccp_v6_init_sock(struct sock *sk) |
| 1026 | { |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1027 | static __u8 dccp_v6_ctl_sock_initialized; |
| 1028 | int err = dccp_init_sock(sk, dccp_v6_ctl_sock_initialized); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1029 | |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1030 | if (err == 0) { |
| 1031 | if (unlikely(!dccp_v6_ctl_sock_initialized)) |
| 1032 | dccp_v6_ctl_sock_initialized = 1; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1033 | inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops; |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1034 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1035 | |
| 1036 | return err; |
| 1037 | } |
| 1038 | |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 1039 | static void dccp_v6_destroy_sock(struct sock *sk) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1040 | { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 1041 | dccp_destroy_sock(sk); |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 1042 | inet6_destroy_sock(sk); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1043 | } |
| 1044 | |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 1045 | static struct timewait_sock_ops dccp6_timewait_sock_ops = { |
| 1046 | .twsk_obj_size = sizeof(struct dccp6_timewait_sock), |
| 1047 | }; |
| 1048 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1049 | static struct proto dccp_v6_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1050 | .name = "DCCPv6", |
| 1051 | .owner = THIS_MODULE, |
| 1052 | .close = dccp_close, |
| 1053 | .connect = dccp_v6_connect, |
| 1054 | .disconnect = dccp_disconnect, |
| 1055 | .ioctl = dccp_ioctl, |
| 1056 | .init = dccp_v6_init_sock, |
| 1057 | .setsockopt = dccp_setsockopt, |
| 1058 | .getsockopt = dccp_getsockopt, |
| 1059 | .sendmsg = dccp_sendmsg, |
| 1060 | .recvmsg = dccp_recvmsg, |
| 1061 | .backlog_rcv = dccp_v6_do_rcv, |
| 1062 | .hash = dccp_v6_hash, |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 1063 | .unhash = inet_unhash, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1064 | .accept = inet_csk_accept, |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 1065 | .get_port = inet_csk_get_port, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1066 | .shutdown = dccp_shutdown, |
| 1067 | .destroy = dccp_v6_destroy_sock, |
| 1068 | .orphan_count = &dccp_orphan_count, |
| 1069 | .max_header = MAX_DCCP_HEADER, |
| 1070 | .obj_size = sizeof(struct dccp6_sock), |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 1071 | .slab_flags = SLAB_DESTROY_BY_RCU, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1072 | .rsk_prot = &dccp6_request_sock_ops, |
| 1073 | .twsk_prot = &dccp6_timewait_sock_ops, |
Pavel Emelyanov | 39d8cda | 2008-03-22 16:50:58 -0700 | [diff] [blame] | 1074 | .h.hashinfo = &dccp_hashinfo, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1075 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1076 | .compat_setsockopt = compat_dccp_setsockopt, |
| 1077 | .compat_getsockopt = compat_dccp_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1078 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1079 | }; |
| 1080 | |
Alexey Dobriyan | 41135cc | 2009-09-14 12:22:28 +0000 | [diff] [blame] | 1081 | static const struct inet6_protocol dccp_v6_protocol = { |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 1082 | .handler = dccp_v6_rcv, |
| 1083 | .err_handler = dccp_v6_err, |
| 1084 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1085 | }; |
| 1086 | |
Alexey Dobriyan | 5708e86 | 2009-09-14 12:23:23 +0000 | [diff] [blame] | 1087 | static const struct proto_ops inet6_dccp_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1088 | .family = PF_INET6, |
| 1089 | .owner = THIS_MODULE, |
| 1090 | .release = inet6_release, |
| 1091 | .bind = inet6_bind, |
| 1092 | .connect = inet_stream_connect, |
| 1093 | .socketpair = sock_no_socketpair, |
| 1094 | .accept = inet_accept, |
| 1095 | .getname = inet6_getname, |
| 1096 | .poll = dccp_poll, |
| 1097 | .ioctl = inet6_ioctl, |
| 1098 | .listen = inet_dccp_listen, |
| 1099 | .shutdown = inet_shutdown, |
| 1100 | .setsockopt = sock_common_setsockopt, |
| 1101 | .getsockopt = sock_common_getsockopt, |
| 1102 | .sendmsg = inet_sendmsg, |
| 1103 | .recvmsg = sock_common_recvmsg, |
| 1104 | .mmap = sock_no_mmap, |
| 1105 | .sendpage = sock_no_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1106 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1107 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 1108 | .compat_getsockopt = compat_sock_common_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1109 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1110 | }; |
| 1111 | |
| 1112 | static struct inet_protosw dccp_v6_protosw = { |
| 1113 | .type = SOCK_DCCP, |
| 1114 | .protocol = IPPROTO_DCCP, |
| 1115 | .prot = &dccp_v6_prot, |
| 1116 | .ops = &inet6_dccp_ops, |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 1117 | .flags = INET_PROTOSW_ICSK, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1118 | }; |
| 1119 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1120 | static int __net_init dccp_v6_init_net(struct net *net) |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1121 | { |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1122 | if (dccp_hashinfo.bhash == NULL) |
| 1123 | return -ESOCKTNOSUPPORT; |
Pavel Emelyanov | 334527d | 2008-04-13 22:32:45 -0700 | [diff] [blame] | 1124 | |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1125 | return inet_ctl_sock_create(&net->dccp.v6_ctl_sk, PF_INET6, |
| 1126 | SOCK_DCCP, IPPROTO_DCCP, net); |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1129 | static void __net_exit dccp_v6_exit_net(struct net *net) |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1130 | { |
Pavel Emelyanov | 334527d | 2008-04-13 22:32:45 -0700 | [diff] [blame] | 1131 | inet_ctl_sock_destroy(net->dccp.v6_ctl_sk); |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1132 | } |
| 1133 | |
| 1134 | static struct pernet_operations dccp_v6_ops = { |
| 1135 | .init = dccp_v6_init_net, |
| 1136 | .exit = dccp_v6_exit_net, |
| 1137 | }; |
| 1138 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1139 | static int __init dccp_v6_init(void) |
| 1140 | { |
| 1141 | int err = proto_register(&dccp_v6_prot, 1); |
| 1142 | |
| 1143 | if (err != 0) |
| 1144 | goto out; |
| 1145 | |
| 1146 | err = inet6_add_protocol(&dccp_v6_protocol, IPPROTO_DCCP); |
| 1147 | if (err != 0) |
| 1148 | goto out_unregister_proto; |
| 1149 | |
| 1150 | inet6_register_protosw(&dccp_v6_protosw); |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1151 | |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1152 | err = register_pernet_subsys(&dccp_v6_ops); |
| 1153 | if (err != 0) |
| 1154 | goto out_destroy_ctl_sock; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1155 | out: |
| 1156 | return err; |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1157 | |
| 1158 | out_destroy_ctl_sock: |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1159 | inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP); |
| 1160 | inet6_unregister_protosw(&dccp_v6_protosw); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1161 | out_unregister_proto: |
| 1162 | proto_unregister(&dccp_v6_prot); |
| 1163 | goto out; |
| 1164 | } |
| 1165 | |
| 1166 | static void __exit dccp_v6_exit(void) |
| 1167 | { |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1168 | unregister_pernet_subsys(&dccp_v6_ops); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1169 | inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP); |
| 1170 | inet6_unregister_protosw(&dccp_v6_protosw); |
| 1171 | proto_unregister(&dccp_v6_prot); |
| 1172 | } |
| 1173 | |
| 1174 | module_init(dccp_v6_init); |
| 1175 | module_exit(dccp_v6_exit); |
| 1176 | |
| 1177 | /* |
| 1178 | * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33) |
| 1179 | * values directly, Also cover the case where the protocol is not specified, |
| 1180 | * i.e. net-pf-PF_INET6-proto-0-type-SOCK_DCCP |
| 1181 | */ |
Jean Delvare | 7131c6c | 2007-10-21 16:45:03 -0700 | [diff] [blame] | 1182 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 33, 6); |
| 1183 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 0, 6); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1184 | MODULE_LICENSE("GPL"); |
| 1185 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); |
| 1186 | MODULE_DESCRIPTION("DCCPv6 - Datagram Congestion Controlled Protocol"); |