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 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 43 | /* add pseudo-header to DCCP checksum stored in skb->csum */ |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 44 | static inline __sum16 dccp_v6_csum_finish(struct sk_buff *skb, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 45 | const struct in6_addr *saddr, |
| 46 | const struct in6_addr *daddr) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 47 | { |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 48 | return csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_DCCP, skb->csum); |
| 49 | } |
| 50 | |
Herbert Xu | bb29624 | 2010-04-11 02:15:55 +0000 | [diff] [blame] | 51 | 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] | 52 | { |
| 53 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 54 | struct dccp_hdr *dh = dccp_hdr(skb); |
| 55 | |
| 56 | dccp_csum_outgoing(skb); |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 57 | dh->dccph_checksum = dccp_v6_csum_finish(skb, &np->saddr, &sk->sk_v6_daddr); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 58 | } |
| 59 | |
David S. Miller | 6e5714e | 2011-08-03 20:50:44 -0700 | [diff] [blame] | 60 | static inline __u64 dccp_v6_init_sequence(struct sk_buff *skb) |
Gerrit Renker | d7f7365 | 2006-11-13 13:34:38 -0200 | [diff] [blame] | 61 | { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 62 | return secure_dccpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32, |
| 63 | ipv6_hdr(skb)->saddr.s6_addr32, |
Gerrit Renker | d7f7365 | 2006-11-13 13:34:38 -0200 | [diff] [blame] | 64 | dccp_hdr(skb)->dccph_dport, |
| 65 | dccp_hdr(skb)->dccph_sport ); |
| 66 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 67 | } |
| 68 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 69 | 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] | 70 | u8 type, u8 code, int offset, __be32 info) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 71 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 72 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 73 | const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset); |
Wei Yongjun | e0bcfb0 | 2008-07-26 11:59:10 +0100 | [diff] [blame] | 74 | struct dccp_sock *dp; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 75 | struct ipv6_pinfo *np; |
| 76 | struct sock *sk; |
| 77 | int err; |
| 78 | __u64 seq; |
Pavel Emelyanov | ca12a1a | 2008-07-16 20:28:42 -0700 | [diff] [blame] | 79 | struct net *net = dev_net(skb->dev); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 80 | |
Wei Yongjun | 860239c | 2008-07-26 11:59:11 +0100 | [diff] [blame] | 81 | if (skb->len < offset + sizeof(*dh) || |
| 82 | skb->len < offset + __dccp_basic_hdr_len(dh)) { |
Eric Dumazet | a16292a | 2016-04-27 16:44:36 -0700 | [diff] [blame] | 83 | __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), |
| 84 | ICMP6_MIB_INERRORS); |
Wei Yongjun | 860239c | 2008-07-26 11:59:11 +0100 | [diff] [blame] | 85 | return; |
| 86 | } |
| 87 | |
Eric Dumazet | 52036a4 | 2015-03-22 10:22:25 -0700 | [diff] [blame] | 88 | sk = __inet6_lookup_established(net, &dccp_hashinfo, |
| 89 | &hdr->daddr, dh->dccph_dport, |
| 90 | &hdr->saddr, ntohs(dh->dccph_sport), |
| 91 | inet6_iif(skb)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 92 | |
Eric Dumazet | 52036a4 | 2015-03-22 10:22:25 -0700 | [diff] [blame] | 93 | if (!sk) { |
Eric Dumazet | a16292a | 2016-04-27 16:44:36 -0700 | [diff] [blame] | 94 | __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), |
| 95 | ICMP6_MIB_INERRORS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 96 | return; |
| 97 | } |
| 98 | |
| 99 | if (sk->sk_state == DCCP_TIME_WAIT) { |
YOSHIFUJI Hideaki | 9469c7b | 2006-10-10 19:41:46 -0700 | [diff] [blame] | 100 | inet_twsk_put(inet_twsk(sk)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 101 | return; |
| 102 | } |
Eric Dumazet | 52036a4 | 2015-03-22 10:22:25 -0700 | [diff] [blame] | 103 | seq = dccp_hdr_seq(dh); |
| 104 | if (sk->sk_state == DCCP_NEW_SYN_RECV) |
| 105 | return dccp_req_err(sk, seq); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 106 | |
| 107 | bh_lock_sock(sk); |
| 108 | if (sock_owned_by_user(sk)) |
Eric Dumazet | 02a1d6e | 2016-04-27 16:44:39 -0700 | [diff] [blame] | 109 | __NET_INC_STATS(net, LINUX_MIB_LOCKDROPPEDICMPS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 110 | |
| 111 | if (sk->sk_state == DCCP_CLOSED) |
| 112 | goto out; |
| 113 | |
Wei Yongjun | e0bcfb0 | 2008-07-26 11:59:10 +0100 | [diff] [blame] | 114 | dp = dccp_sk(sk); |
Wei Yongjun | e0bcfb0 | 2008-07-26 11:59:10 +0100 | [diff] [blame] | 115 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_LISTEN) && |
| 116 | !between48(seq, dp->dccps_awl, dp->dccps_awh)) { |
Eric Dumazet | 02a1d6e | 2016-04-27 16:44:39 -0700 | [diff] [blame] | 117 | __NET_INC_STATS(net, LINUX_MIB_OUTOFWINDOWICMPS); |
Wei Yongjun | e0bcfb0 | 2008-07-26 11:59:10 +0100 | [diff] [blame] | 118 | goto out; |
| 119 | } |
| 120 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 121 | np = inet6_sk(sk); |
| 122 | |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 123 | if (type == NDISC_REDIRECT) { |
| 124 | struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie); |
| 125 | |
David S. Miller | 1ed5c48 | 2012-07-12 00:41:25 -0700 | [diff] [blame] | 126 | if (dst) |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 127 | dst->ops->redirect(dst, sk, skb); |
Duan Jiong | bd784a1 | 2013-09-18 20:03:27 +0800 | [diff] [blame] | 128 | goto out; |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 129 | } |
| 130 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 131 | if (type == ICMPV6_PKT_TOOBIG) { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 132 | struct dst_entry *dst = NULL; |
| 133 | |
Hannes Frederic Sowa | 93b36cf | 2013-12-15 03:41:14 +0100 | [diff] [blame] | 134 | if (!ip6_sk_accept_pmtu(sk)) |
| 135 | goto out; |
| 136 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 137 | if (sock_owned_by_user(sk)) |
| 138 | goto out; |
| 139 | if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED)) |
| 140 | goto out; |
| 141 | |
David S. Miller | 35ad9b9 | 2012-07-16 03:44:56 -0700 | [diff] [blame] | 142 | dst = inet6_csk_update_pmtu(sk, ntohl(info)); |
| 143 | if (!dst) |
| 144 | goto out; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 145 | |
David S. Miller | 35ad9b9 | 2012-07-16 03:44:56 -0700 | [diff] [blame] | 146 | if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 147 | dccp_sync_mss(sk, dst_mtu(dst)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 148 | goto out; |
| 149 | } |
| 150 | |
| 151 | icmpv6_err_convert(type, code, &err); |
| 152 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 153 | /* Might be for an request_sock */ |
| 154 | switch (sk->sk_state) { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 155 | case DCCP_REQUESTING: |
| 156 | case DCCP_RESPOND: /* Cannot happen. |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 157 | It can, it SYNs are crossed. --ANK */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 158 | if (!sock_owned_by_user(sk)) { |
Eric Dumazet | aa62d76 | 2016-04-27 16:44:28 -0700 | [diff] [blame] | 159 | __DCCP_INC_STATS(DCCP_MIB_ATTEMPTFAILS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 160 | sk->sk_err = err; |
| 161 | /* |
| 162 | * Wake people up to see the error |
| 163 | * (see connect in sock.c) |
| 164 | */ |
| 165 | sk->sk_error_report(sk); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 166 | dccp_done(sk); |
| 167 | } else |
| 168 | sk->sk_err_soft = err; |
| 169 | goto out; |
| 170 | } |
| 171 | |
| 172 | if (!sock_owned_by_user(sk) && np->recverr) { |
| 173 | sk->sk_err = err; |
| 174 | sk->sk_error_report(sk); |
| 175 | } else |
| 176 | sk->sk_err_soft = err; |
| 177 | |
| 178 | out: |
| 179 | bh_unlock_sock(sk); |
| 180 | sock_put(sk); |
| 181 | } |
| 182 | |
| 183 | |
Eric Dumazet | ea3bea3 | 2015-09-25 07:39:23 -0700 | [diff] [blame] | 184 | static int dccp_v6_send_response(const struct sock *sk, struct request_sock *req) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 185 | { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 186 | struct inet_request_sock *ireq = inet_rsk(req); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 187 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 188 | struct sk_buff *skb; |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 189 | struct in6_addr *final_p, final; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 190 | struct flowi6 fl6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 191 | int err = -1; |
Denis V. Lunev | fd80eb9 | 2008-02-29 11:43:03 -0800 | [diff] [blame] | 192 | struct dst_entry *dst; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 193 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 194 | memset(&fl6, 0, sizeof(fl6)); |
| 195 | fl6.flowi6_proto = IPPROTO_DCCP; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 196 | fl6.daddr = ireq->ir_v6_rmt_addr; |
| 197 | fl6.saddr = ireq->ir_v6_loc_addr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 198 | fl6.flowlabel = 0; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 199 | fl6.flowi6_oif = ireq->ir_iif; |
| 200 | fl6.fl6_dport = ireq->ir_rmt_port; |
Eric Dumazet | b44084c | 2013-10-10 00:04:37 -0700 | [diff] [blame] | 201 | fl6.fl6_sport = htons(ireq->ir_num); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 202 | security_req_classify_flow(req, flowi6_to_flowi(&fl6)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 203 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 204 | |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 205 | rcu_read_lock(); |
| 206 | final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt), &final); |
| 207 | rcu_read_unlock(); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 208 | |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 209 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 210 | if (IS_ERR(dst)) { |
| 211 | err = PTR_ERR(dst); |
| 212 | dst = NULL; |
Denis V. Lunev | fd80eb9 | 2008-02-29 11:43:03 -0800 | [diff] [blame] | 213 | goto done; |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 214 | } |
Denis V. Lunev | fd80eb9 | 2008-02-29 11:43:03 -0800 | [diff] [blame] | 215 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 216 | skb = dccp_make_response(sk, dst, req); |
| 217 | if (skb != NULL) { |
| 218 | struct dccp_hdr *dh = dccp_hdr(skb); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 219 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 220 | dh->dccph_checksum = dccp_v6_csum_finish(skb, |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 221 | &ireq->ir_v6_loc_addr, |
| 222 | &ireq->ir_v6_rmt_addr); |
| 223 | fl6.daddr = ireq->ir_v6_rmt_addr; |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 224 | rcu_read_lock(); |
| 225 | err = ip6_xmit(sk, skb, &fl6, rcu_dereference(np->opt), |
| 226 | np->tclass); |
| 227 | rcu_read_unlock(); |
Gerrit Renker | b9df3cb | 2006-11-14 11:21:36 -0200 | [diff] [blame] | 228 | err = net_xmit_eval(err); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | done: |
David S. Miller | 0cbd782 | 2006-01-31 17:53:37 -0800 | [diff] [blame] | 232 | dst_release(dst); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 233 | return err; |
| 234 | } |
| 235 | |
| 236 | static void dccp_v6_reqsk_destructor(struct request_sock *req) |
| 237 | { |
Gerrit Renker | d99a7bd | 2008-11-04 23:56:30 -0800 | [diff] [blame] | 238 | dccp_feat_list_purge(&dccp_rsk(req)->dreq_featneg); |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 239 | kfree_skb(inet_rsk(req)->pktopts); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 240 | } |
| 241 | |
Eric Dumazet | a00e744 | 2015-09-29 07:42:39 -0700 | [diff] [blame] | 242 | static void dccp_v6_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 243 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 244 | const struct ipv6hdr *rxip6h; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 245 | struct sk_buff *skb; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 246 | struct flowi6 fl6; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 247 | struct net *net = dev_net(skb_dst(rxskb)->dev); |
Pavel Emelyanov | 334527d | 2008-04-13 22:32:45 -0700 | [diff] [blame] | 248 | struct sock *ctl_sk = net->dccp.v6_ctl_sk; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 249 | struct dst_entry *dst; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 250 | |
Gerrit Renker | e356d37 | 2007-09-26 14:35:19 -0300 | [diff] [blame] | 251 | if (dccp_hdr(rxskb)->dccph_type == DCCP_PKT_RESET) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 252 | return; |
| 253 | |
| 254 | if (!ipv6_unicast_destination(rxskb)) |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 255 | return; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 256 | |
Pavel Emelyanov | 0204774 | 2008-04-13 22:32:25 -0700 | [diff] [blame] | 257 | skb = dccp_ctl_make_reset(ctl_sk, rxskb); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 258 | if (skb == NULL) |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 259 | return; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 260 | |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 261 | rxip6h = ipv6_hdr(rxskb); |
Gerrit Renker | e356d37 | 2007-09-26 14:35:19 -0300 | [diff] [blame] | 262 | dccp_hdr(skb)->dccph_checksum = dccp_v6_csum_finish(skb, &rxip6h->saddr, |
| 263 | &rxip6h->daddr); |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 264 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 265 | memset(&fl6, 0, sizeof(fl6)); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 266 | fl6.daddr = rxip6h->saddr; |
| 267 | fl6.saddr = rxip6h->daddr; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 268 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 269 | fl6.flowi6_proto = IPPROTO_DCCP; |
| 270 | fl6.flowi6_oif = inet6_iif(rxskb); |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 271 | fl6.fl6_dport = dccp_hdr(skb)->dccph_dport; |
| 272 | fl6.fl6_sport = dccp_hdr(skb)->dccph_sport; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 273 | security_skb_classify_flow(rxskb, flowi6_to_flowi(&fl6)); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 274 | |
| 275 | /* sk = NULL, but it is safe for now. RST socket required. */ |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 276 | dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 277 | if (!IS_ERR(dst)) { |
| 278 | skb_dst_set(skb, dst); |
Eric Dumazet | b903d32 | 2011-10-27 00:44:35 -0400 | [diff] [blame] | 279 | ip6_xmit(ctl_sk, skb, &fl6, NULL, 0); |
Eric Dumazet | 7309f88 | 2016-04-29 14:16:49 -0700 | [diff] [blame] | 280 | DCCP_INC_STATS(DCCP_MIB_OUTSEGS); |
| 281 | DCCP_INC_STATS(DCCP_MIB_OUTRSTS); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 282 | return; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | kfree_skb(skb); |
| 286 | } |
| 287 | |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 288 | static struct request_sock_ops dccp6_request_sock_ops = { |
| 289 | .family = AF_INET6, |
| 290 | .obj_size = sizeof(struct dccp6_request_sock), |
| 291 | .rtx_syn_ack = dccp_v6_send_response, |
| 292 | .send_ack = dccp_reqsk_send_ack, |
| 293 | .destructor = dccp_v6_reqsk_destructor, |
| 294 | .send_reset = dccp_v6_ctl_send_reset, |
Eric Dumazet | c72e118 | 2012-04-12 22:16:05 +0000 | [diff] [blame] | 295 | .syn_ack_timeout = dccp_syn_ack_timeout, |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 296 | }; |
| 297 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 298 | static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb) |
| 299 | { |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 300 | struct request_sock *req; |
| 301 | struct dccp_request_sock *dreq; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 302 | struct inet_request_sock *ireq; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 303 | struct ipv6_pinfo *np = inet6_sk(sk); |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 304 | const __be32 service = dccp_hdr_request(skb)->dccph_req_service; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 305 | struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 306 | |
| 307 | if (skb->protocol == htons(ETH_P_IP)) |
| 308 | return dccp_v4_conn_request(sk, skb); |
| 309 | |
| 310 | if (!ipv6_unicast_destination(skb)) |
Gerrit Renker | 4a5409a | 2007-10-04 14:52:28 -0700 | [diff] [blame] | 311 | return 0; /* discard, don't send a reset here */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 312 | |
| 313 | if (dccp_bad_service_code(sk, service)) { |
Gerrit Renker | 4a5409a | 2007-10-04 14:52:28 -0700 | [diff] [blame] | 314 | dcb->dccpd_reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 315 | goto drop; |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 316 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 317 | /* |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 318 | * There are no SYN attacks on IPv6, yet... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 319 | */ |
Gerrit Renker | 4a5409a | 2007-10-04 14:52:28 -0700 | [diff] [blame] | 320 | dcb->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 321 | if (inet_csk_reqsk_queue_is_full(sk)) |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 322 | goto drop; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 323 | |
| 324 | if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) |
| 325 | goto drop; |
| 326 | |
Eric Dumazet | a1a5344 | 2015-10-04 21:08:11 -0700 | [diff] [blame] | 327 | req = inet_reqsk_alloc(&dccp6_request_sock_ops, sk, true); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 328 | if (req == NULL) |
| 329 | goto drop; |
| 330 | |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 331 | if (dccp_reqsk_init(req, dccp_sk(sk), skb)) |
| 332 | goto drop_and_free; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 333 | |
Gerrit Renker | 8b81941 | 2007-12-13 12:29:24 -0200 | [diff] [blame] | 334 | dreq = dccp_rsk(req); |
| 335 | if (dccp_parse_options(sk, dreq, skb)) |
| 336 | goto drop_and_free; |
| 337 | |
Venkat Yekkirala | 4237c75 | 2006-07-24 23:32:50 -0700 | [diff] [blame] | 338 | if (security_inet_conn_request(sk, skb, req)) |
| 339 | goto drop_and_free; |
| 340 | |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 341 | ireq = inet_rsk(req); |
| 342 | ireq->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr; |
| 343 | ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr; |
Eric Dumazet | 3f66b08 | 2015-03-12 16:44:10 -0700 | [diff] [blame] | 344 | ireq->ireq_family = AF_INET6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 345 | |
Eric Dumazet | a224772 | 2014-09-27 09:50:56 -0700 | [diff] [blame] | 346 | if (ipv6_opt_accepted(sk, skb, IP6CB(skb)) || |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 347 | np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo || |
| 348 | np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) { |
| 349 | atomic_inc(&skb->users); |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 350 | ireq->pktopts = skb; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 351 | } |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 352 | ireq->ir_iif = sk->sk_bound_dev_if; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 353 | |
| 354 | /* So that link locals have meaning */ |
| 355 | if (!sk->sk_bound_dev_if && |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 356 | ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL) |
| 357 | ireq->ir_iif = inet6_iif(skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 358 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 359 | /* |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 360 | * Step 3: Process LISTEN state |
| 361 | * |
Gerrit Renker | d83ca5a | 2006-11-10 16:29:14 -0200 | [diff] [blame] | 362 | * 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] | 363 | * |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 364 | * 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] | 365 | */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 366 | dreq->dreq_isr = dcb->dccpd_seq; |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 367 | dreq->dreq_gsr = dreq->dreq_isr; |
Gerrit Renker | 865e902 | 2006-11-13 13:31:50 -0200 | [diff] [blame] | 368 | dreq->dreq_iss = dccp_v6_init_sequence(skb); |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 369 | dreq->dreq_gss = dreq->dreq_iss; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 370 | dreq->dreq_service = service; |
| 371 | |
Christoph Paasch | 1a2c618 | 2013-03-17 08:23:34 +0000 | [diff] [blame] | 372 | if (dccp_v6_send_response(sk, req)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 373 | goto drop_and_free; |
| 374 | |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 375 | inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 376 | return 0; |
| 377 | |
| 378 | drop_and_free: |
| 379 | reqsk_free(req); |
| 380 | drop: |
Eric Dumazet | aa62d76 | 2016-04-27 16:44:28 -0700 | [diff] [blame] | 381 | __DCCP_INC_STATS(DCCP_MIB_ATTEMPTFAILS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 382 | return -1; |
| 383 | } |
| 384 | |
Eric Dumazet | 0c27171 | 2015-09-29 07:42:48 -0700 | [diff] [blame] | 385 | static struct sock *dccp_v6_request_recv_sock(const struct sock *sk, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 386 | struct sk_buff *skb, |
| 387 | struct request_sock *req, |
Eric Dumazet | 5e0724d | 2015-10-22 08:20:46 -0700 | [diff] [blame] | 388 | struct dst_entry *dst, |
| 389 | struct request_sock *req_unhash, |
| 390 | bool *own_req) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 391 | { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 392 | struct inet_request_sock *ireq = inet_rsk(req); |
Eric Dumazet | 0c27171 | 2015-09-29 07:42:48 -0700 | [diff] [blame] | 393 | struct ipv6_pinfo *newnp; |
| 394 | const struct ipv6_pinfo *np = inet6_sk(sk); |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 395 | struct ipv6_txoptions *opt; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 396 | struct inet_sock *newinet; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 397 | struct dccp6_sock *newdp6; |
| 398 | struct sock *newsk; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 399 | |
| 400 | if (skb->protocol == htons(ETH_P_IP)) { |
| 401 | /* |
| 402 | * v6 mapped |
| 403 | */ |
Eric Dumazet | 5e0724d | 2015-10-22 08:20:46 -0700 | [diff] [blame] | 404 | newsk = dccp_v4_request_recv_sock(sk, skb, req, dst, |
| 405 | req_unhash, own_req); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 406 | if (newsk == NULL) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 407 | return NULL; |
| 408 | |
| 409 | newdp6 = (struct dccp6_sock *)newsk; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 410 | newinet = inet_sk(newsk); |
| 411 | newinet->pinet6 = &newdp6->inet6; |
| 412 | newnp = inet6_sk(newsk); |
| 413 | |
| 414 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); |
| 415 | |
Eric Dumazet | d1e559d | 2015-03-18 14:05:35 -0700 | [diff] [blame] | 416 | newnp->saddr = newsk->sk_v6_rcv_saddr; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 417 | |
| 418 | inet_csk(newsk)->icsk_af_ops = &dccp_ipv6_mapped; |
| 419 | newsk->sk_backlog_rcv = dccp_v4_do_rcv; |
| 420 | newnp->pktoptions = NULL; |
| 421 | newnp->opt = NULL; |
| 422 | newnp->mcast_oif = inet6_iif(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 423 | newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 424 | |
| 425 | /* |
| 426 | * No need to charge this sock to the relevant IPv6 refcnt debug socks count |
| 427 | * here, dccp_create_openreq_child now does this for us, see the comment in |
| 428 | * that function for the gory details. -acme |
| 429 | */ |
| 430 | |
| 431 | /* It is tricky place. Until this moment IPv4 tcp |
| 432 | worked with IPv6 icsk.icsk_af_ops. |
| 433 | Sync it now. |
| 434 | */ |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 435 | dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 436 | |
| 437 | return newsk; |
| 438 | } |
| 439 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 440 | |
| 441 | if (sk_acceptq_is_full(sk)) |
| 442 | goto out_overflow; |
| 443 | |
Eric Dumazet | f76b33c | 2015-09-29 07:42:42 -0700 | [diff] [blame] | 444 | if (!dst) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 445 | struct flowi6 fl6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 446 | |
Eric Dumazet | f76b33c | 2015-09-29 07:42:42 -0700 | [diff] [blame] | 447 | dst = inet6_csk_route_req(sk, &fl6, req, IPPROTO_DCCP); |
| 448 | if (!dst) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 449 | goto out; |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 450 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 451 | |
| 452 | newsk = dccp_create_openreq_child(sk, req, skb); |
| 453 | if (newsk == NULL) |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 454 | goto out_nonewsk; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 455 | |
| 456 | /* |
| 457 | * No need to charge this sock to the relevant IPv6 refcnt debug socks |
| 458 | * count here, dccp_create_openreq_child now does this for us, see the |
| 459 | * comment in that function for the gory details. -acme |
| 460 | */ |
| 461 | |
Eric Dumazet | 6bd4f35 | 2015-12-02 21:53:57 -0800 | [diff] [blame] | 462 | ip6_dst_store(newsk, dst, NULL, NULL); |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 463 | newsk->sk_route_caps = dst->dev->features & ~(NETIF_F_IP_CSUM | |
| 464 | NETIF_F_TSO); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 465 | newdp6 = (struct dccp6_sock *)newsk; |
| 466 | newinet = inet_sk(newsk); |
| 467 | newinet->pinet6 = &newdp6->inet6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 468 | newnp = inet6_sk(newsk); |
| 469 | |
| 470 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); |
| 471 | |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 472 | newsk->sk_v6_daddr = ireq->ir_v6_rmt_addr; |
| 473 | newnp->saddr = ireq->ir_v6_loc_addr; |
| 474 | newsk->sk_v6_rcv_saddr = ireq->ir_v6_loc_addr; |
| 475 | newsk->sk_bound_dev_if = ireq->ir_iif; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 476 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 477 | /* Now IPv6 options... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 478 | |
| 479 | First: no IPv4 options. |
| 480 | */ |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 481 | newinet->inet_opt = NULL; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 482 | |
| 483 | /* Clone RX bits */ |
| 484 | newnp->rxopt.all = np->rxopt.all; |
| 485 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 486 | newnp->pktoptions = NULL; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 487 | newnp->opt = NULL; |
| 488 | newnp->mcast_oif = inet6_iif(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 489 | newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 490 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 491 | /* |
| 492 | * Clone native IPv6 options from listening socket (if any) |
| 493 | * |
| 494 | * Yes, keeping reference count would be much more clever, but we make |
| 495 | * one more one thing there: reattach optmem to newsk. |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 496 | */ |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 497 | opt = rcu_dereference(np->opt); |
| 498 | if (opt) { |
| 499 | opt = ipv6_dup_options(newsk, opt); |
| 500 | RCU_INIT_POINTER(newnp->opt, opt); |
| 501 | } |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 502 | inet_csk(newsk)->icsk_ext_hdr_len = 0; |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 503 | if (opt) |
| 504 | inet_csk(newsk)->icsk_ext_hdr_len = opt->opt_nflen + |
| 505 | opt->opt_flen; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 506 | |
| 507 | dccp_sync_mss(newsk, dst_mtu(dst)); |
| 508 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 509 | newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6; |
| 510 | newinet->inet_rcv_saddr = LOOPBACK4_IPV6; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 511 | |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 512 | if (__inet_inherit_port(sk, newsk) < 0) { |
Christoph Paasch | e337e24 | 2012-12-14 04:07:58 +0000 | [diff] [blame] | 513 | inet_csk_prepare_forced_close(newsk); |
| 514 | dccp_done(newsk); |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 515 | goto out; |
| 516 | } |
Eric Dumazet | 5e0724d | 2015-10-22 08:20:46 -0700 | [diff] [blame] | 517 | *own_req = inet_ehash_nolisten(newsk, req_to_sk(req_unhash)); |
Eric Dumazet | ce10500 | 2015-10-30 09:46:12 -0700 | [diff] [blame] | 518 | /* Clone pktoptions received with SYN, if we own the req */ |
| 519 | if (*own_req && ireq->pktopts) { |
| 520 | newnp->pktoptions = skb_clone(ireq->pktopts, GFP_ATOMIC); |
| 521 | consume_skb(ireq->pktopts); |
| 522 | ireq->pktopts = NULL; |
| 523 | if (newnp->pktoptions) |
| 524 | skb_set_owner_r(newnp->pktoptions, newsk); |
| 525 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 526 | |
| 527 | return newsk; |
| 528 | |
| 529 | out_overflow: |
Eric Dumazet | 02a1d6e | 2016-04-27 16:44:39 -0700 | [diff] [blame] | 530 | __NET_INC_STATS(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS); |
Balazs Scheidler | 093d282 | 2010-10-21 13:06:43 +0200 | [diff] [blame] | 531 | out_nonewsk: |
| 532 | dst_release(dst); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 533 | out: |
Eric Dumazet | 02a1d6e | 2016-04-27 16:44:39 -0700 | [diff] [blame] | 534 | __NET_INC_STATS(sock_net(sk), LINUX_MIB_LISTENDROPS); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 535 | return NULL; |
| 536 | } |
| 537 | |
| 538 | /* The socket must have it's spinlock held when we get |
| 539 | * here. |
| 540 | * |
| 541 | * We have a potential double-lock case here, so even when |
| 542 | * doing backlog processing we use the BH locking scheme. |
| 543 | * This is because we cannot sleep with the original spinlock |
| 544 | * held. |
| 545 | */ |
| 546 | static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) |
| 547 | { |
| 548 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 549 | struct sk_buff *opt_skb = NULL; |
| 550 | |
| 551 | /* Imagine: socket is IPv6. IPv4 packet arrives, |
| 552 | goes to IPv4 receive handler and backlogged. |
| 553 | From backlog it always goes here. Kerboom... |
| 554 | Fortunately, dccp_rcv_established and rcv_established |
| 555 | handle them correctly, but it is not case with |
| 556 | dccp_v6_hnd_req and dccp_v6_ctl_send_reset(). --ANK |
| 557 | */ |
| 558 | |
| 559 | if (skb->protocol == htons(ETH_P_IP)) |
| 560 | return dccp_v4_do_rcv(sk, skb); |
| 561 | |
Dmitry Mishin | fda9ef5 | 2006-08-31 15:28:39 -0700 | [diff] [blame] | 562 | if (sk_filter(sk, skb)) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 563 | goto discard; |
| 564 | |
| 565 | /* |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 566 | * socket locking is here for SMP purposes as backlog rcv is currently |
| 567 | * called with bh processing disabled. |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 568 | */ |
| 569 | |
| 570 | /* Do Stevens' IPV6_PKTOPTIONS. |
| 571 | |
| 572 | Yes, guys, it is the only place in our code, where we |
| 573 | may make it not affecting IPv4. |
| 574 | The rest of code is protocol independent, |
| 575 | and I do not like idea to uglify IPv4. |
| 576 | |
| 577 | Actually, all the idea behind IPV6_PKTOPTIONS |
| 578 | looks not very well thought. For now we latch |
| 579 | options, received in the last packet, enqueued |
| 580 | by tcp. Feel free to propose better solution. |
YOSHIFUJI Hideaki | c9eaf17 | 2007-02-09 23:24:38 +0900 | [diff] [blame] | 581 | --ANK (980728) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 582 | */ |
| 583 | if (np->rxopt.all) |
Gerrit Renker | 89e7e57 | 2006-11-10 11:13:33 -0200 | [diff] [blame] | 584 | /* |
| 585 | * FIXME: Add handling of IPV6_PKTOPTIONS skb. See the comments below |
| 586 | * (wrt ipv6_pktopions) and net/ipv6/tcp_ipv6.c for an example. |
| 587 | */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 588 | opt_skb = skb_clone(skb, GFP_ATOMIC); |
| 589 | |
| 590 | if (sk->sk_state == DCCP_OPEN) { /* Fast path */ |
| 591 | if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len)) |
| 592 | goto reset; |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 593 | if (opt_skb) { |
Gerrit Renker | 89e7e57 | 2006-11-10 11:13:33 -0200 | [diff] [blame] | 594 | /* XXX This is where we would goto ipv6_pktoptions. */ |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 595 | __kfree_skb(opt_skb); |
| 596 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 597 | return 0; |
| 598 | } |
| 599 | |
Gerrit Renker | d83ca5a | 2006-11-10 16:29:14 -0200 | [diff] [blame] | 600 | /* |
| 601 | * Step 3: Process LISTEN state |
| 602 | * If S.state == LISTEN, |
| 603 | * If P.type == Request or P contains a valid Init Cookie option, |
| 604 | * (* Must scan the packet's options to check for Init |
| 605 | * Cookies. Only Init Cookies are processed here, |
| 606 | * however; other options are processed in Step 8. This |
| 607 | * scan need only be performed if the endpoint uses Init |
| 608 | * Cookies *) |
| 609 | * (* Generate a new socket and switch to that socket *) |
| 610 | * Set S := new socket for this port pair |
| 611 | * S.state = RESPOND |
| 612 | * Choose S.ISS (initial seqno) or set from Init Cookies |
| 613 | * Initialize S.GAR := S.ISS |
| 614 | * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookies |
| 615 | * Continue with S.state == RESPOND |
| 616 | * (* A Response packet will be generated in Step 11 *) |
| 617 | * Otherwise, |
| 618 | * Generate Reset(No Connection) unless P.type == Reset |
| 619 | * Drop packet and return |
| 620 | * |
| 621 | * NOTE: the check for the packet types is done in |
| 622 | * dccp_rcv_state_process |
| 623 | */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 624 | |
| 625 | if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len)) |
| 626 | goto reset; |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 627 | if (opt_skb) { |
Gerrit Renker | 89e7e57 | 2006-11-10 11:13:33 -0200 | [diff] [blame] | 628 | /* XXX This is where we would goto ipv6_pktoptions. */ |
David S. Miller | fd169f1 | 2006-10-20 19:44:17 -0700 | [diff] [blame] | 629 | __kfree_skb(opt_skb); |
| 630 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 631 | return 0; |
| 632 | |
| 633 | reset: |
YOSHIFUJI Hideaki | cfb6eeb | 2006-11-14 19:07:45 -0800 | [diff] [blame] | 634 | dccp_v6_ctl_send_reset(sk, skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 635 | discard: |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 636 | if (opt_skb != NULL) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 637 | __kfree_skb(opt_skb); |
| 638 | kfree_skb(skb); |
| 639 | return 0; |
| 640 | } |
| 641 | |
Herbert Xu | e5bbef2 | 2007-10-15 12:50:28 -0700 | [diff] [blame] | 642 | static int dccp_v6_rcv(struct sk_buff *skb) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 643 | { |
| 644 | const struct dccp_hdr *dh; |
Eric Dumazet | 3b24d85 | 2016-04-01 08:52:17 -0700 | [diff] [blame] | 645 | bool refcounted; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 646 | struct sock *sk; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 647 | int min_cov; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 648 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 649 | /* Step 1: Check header basics */ |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 650 | |
| 651 | if (dccp_invalid_packet(skb)) |
| 652 | goto discard_it; |
| 653 | |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 654 | /* 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] | 655 | if (dccp_v6_csum_finish(skb, &ipv6_hdr(skb)->saddr, |
| 656 | &ipv6_hdr(skb)->daddr)) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 657 | DCCP_WARN("dropped packet with invalid checksum\n"); |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 658 | goto discard_it; |
| 659 | } |
| 660 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 661 | dh = dccp_hdr(skb); |
| 662 | |
Gerrit Renker | fde2010 | 2007-10-24 10:12:09 -0200 | [diff] [blame] | 663 | DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 664 | DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type; |
| 665 | |
| 666 | if (dccp_packet_without_ack(skb)) |
| 667 | DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ; |
| 668 | else |
| 669 | DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb); |
| 670 | |
Eric Dumazet | 4bdc3d6 | 2015-10-13 17:12:54 -0700 | [diff] [blame] | 671 | lookup: |
Craig Gallek | a583636 | 2016-02-10 11:50:38 -0500 | [diff] [blame] | 672 | sk = __inet6_lookup_skb(&dccp_hashinfo, skb, __dccp_hdr_len(dh), |
Eric Dumazet | 870c315 | 2014-10-17 09:17:20 -0700 | [diff] [blame] | 673 | dh->dccph_sport, dh->dccph_dport, |
Eric Dumazet | 3b24d85 | 2016-04-01 08:52:17 -0700 | [diff] [blame] | 674 | inet6_iif(skb), &refcounted); |
Eric Dumazet | 4bdc3d6 | 2015-10-13 17:12:54 -0700 | [diff] [blame] | 675 | if (!sk) { |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 676 | dccp_pr_debug("failed to look up flow ID in table and " |
| 677 | "get corresponding socket\n"); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 678 | goto no_dccp_socket; |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 679 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 680 | |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 681 | /* |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 682 | * Step 2: |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 683 | * ... or S.state == TIMEWAIT, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 684 | * Generate Reset(No Connection) unless P.type == Reset |
| 685 | * Drop packet and return |
| 686 | */ |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 687 | if (sk->sk_state == DCCP_TIME_WAIT) { |
| 688 | dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: do_time_wait\n"); |
| 689 | inet_twsk_put(inet_twsk(sk)); |
| 690 | goto no_dccp_socket; |
| 691 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 692 | |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 693 | if (sk->sk_state == DCCP_NEW_SYN_RECV) { |
| 694 | struct request_sock *req = inet_reqsk(sk); |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 695 | struct sock *nsk; |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 696 | |
| 697 | sk = req->rsk_listener; |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 698 | if (unlikely(sk->sk_state != DCCP_LISTEN)) { |
Eric Dumazet | f03f2e1 | 2015-10-14 11:16:27 -0700 | [diff] [blame] | 699 | inet_csk_reqsk_queue_drop_and_put(sk, req); |
Eric Dumazet | 4bdc3d6 | 2015-10-13 17:12:54 -0700 | [diff] [blame] | 700 | goto lookup; |
| 701 | } |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 702 | sock_hold(sk); |
Eric Dumazet | 3b24d85 | 2016-04-01 08:52:17 -0700 | [diff] [blame] | 703 | refcounted = true; |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 704 | nsk = dccp_check_req(sk, skb, req); |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 705 | if (!nsk) { |
| 706 | reqsk_put(req); |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 707 | goto discard_and_relse; |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 708 | } |
| 709 | if (nsk == sk) { |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 710 | reqsk_put(req); |
| 711 | } else if (dccp_child_process(sk, nsk, skb)) { |
| 712 | dccp_v6_ctl_send_reset(sk, skb); |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 713 | goto discard_and_relse; |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 714 | } else { |
Eric Dumazet | 7716682 | 2016-02-18 05:39:18 -0800 | [diff] [blame] | 715 | sock_put(sk); |
Eric Dumazet | 079096f | 2015-10-02 11:43:32 -0700 | [diff] [blame] | 716 | return 0; |
| 717 | } |
| 718 | } |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 719 | /* |
| 720 | * RFC 4340, sec. 9.2.1: Minimum Checksum Coverage |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 721 | * o if MinCsCov = 0, only packets with CsCov = 0 are accepted |
| 722 | * o if MinCsCov > 0, also accept packets with CsCov >= MinCsCov |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 723 | */ |
| 724 | min_cov = dccp_sk(sk)->dccps_pcrlen; |
| 725 | if (dh->dccph_cscov && (min_cov == 0 || dh->dccph_cscov < min_cov)) { |
| 726 | dccp_pr_debug("Packet CsCov %d does not satisfy MinCsCov %d\n", |
| 727 | dh->dccph_cscov, min_cov); |
| 728 | /* FIXME: send Data Dropped option (see also dccp_v4_rcv) */ |
| 729 | goto discard_and_relse; |
| 730 | } |
| 731 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 732 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
| 733 | goto discard_and_relse; |
| 734 | |
Arnaldo Carvalho de Melo | 58a5a7b | 2006-11-16 14:06:06 -0200 | [diff] [blame] | 735 | return sk_receive_skb(sk, skb, 1) ? -1 : 0; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 736 | |
| 737 | no_dccp_socket: |
| 738 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| 739 | goto discard_it; |
| 740 | /* |
| 741 | * Step 2: |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 742 | * If no socket ... |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 743 | * Generate Reset(No Connection) unless P.type == Reset |
| 744 | * Drop packet and return |
| 745 | */ |
| 746 | if (dh->dccph_type != DCCP_PKT_RESET) { |
| 747 | DCCP_SKB_CB(skb)->dccpd_reset_code = |
| 748 | DCCP_RESET_CODE_NO_CONNECTION; |
YOSHIFUJI Hideaki | cfb6eeb | 2006-11-14 19:07:45 -0800 | [diff] [blame] | 749 | dccp_v6_ctl_send_reset(sk, skb); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 750 | } |
Gerrit Renker | d23c710 | 2006-11-10 11:46:34 -0200 | [diff] [blame] | 751 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 752 | discard_it: |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 753 | kfree_skb(skb); |
| 754 | return 0; |
| 755 | |
| 756 | discard_and_relse: |
Eric Dumazet | 3b24d85 | 2016-04-01 08:52:17 -0700 | [diff] [blame] | 757 | if (refcounted) |
| 758 | sock_put(sk); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 759 | goto discard_it; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 760 | } |
| 761 | |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 762 | static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, |
| 763 | int addr_len) |
| 764 | { |
| 765 | struct sockaddr_in6 *usin = (struct sockaddr_in6 *)uaddr; |
| 766 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 767 | struct inet_sock *inet = inet_sk(sk); |
| 768 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 769 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 770 | struct in6_addr *saddr = NULL, *final_p, final; |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 771 | struct ipv6_txoptions *opt; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 772 | struct flowi6 fl6; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 773 | struct dst_entry *dst; |
| 774 | int addr_type; |
| 775 | int err; |
| 776 | |
| 777 | dp->dccps_role = DCCP_ROLE_CLIENT; |
| 778 | |
| 779 | if (addr_len < SIN6_LEN_RFC2133) |
| 780 | return -EINVAL; |
| 781 | |
| 782 | if (usin->sin6_family != AF_INET6) |
| 783 | return -EAFNOSUPPORT; |
| 784 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 785 | memset(&fl6, 0, sizeof(fl6)); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 786 | |
| 787 | if (np->sndflow) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 788 | fl6.flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; |
| 789 | IP6_ECN_flow_init(fl6.flowlabel); |
| 790 | if (fl6.flowlabel & IPV6_FLOWLABEL_MASK) { |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 791 | struct ip6_flowlabel *flowlabel; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 792 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 793 | if (flowlabel == NULL) |
| 794 | return -EINVAL; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 795 | fl6_sock_release(flowlabel); |
| 796 | } |
| 797 | } |
| 798 | /* |
| 799 | * connect() to INADDR_ANY means loopback (BSD'ism). |
| 800 | */ |
| 801 | if (ipv6_addr_any(&usin->sin6_addr)) |
| 802 | usin->sin6_addr.s6_addr[15] = 1; |
| 803 | |
| 804 | addr_type = ipv6_addr_type(&usin->sin6_addr); |
| 805 | |
| 806 | if (addr_type & IPV6_ADDR_MULTICAST) |
| 807 | return -ENETUNREACH; |
| 808 | |
| 809 | if (addr_type & IPV6_ADDR_LINKLOCAL) { |
| 810 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 811 | usin->sin6_scope_id) { |
| 812 | /* If interface is set while binding, indices |
| 813 | * must coincide. |
| 814 | */ |
| 815 | if (sk->sk_bound_dev_if && |
| 816 | sk->sk_bound_dev_if != usin->sin6_scope_id) |
| 817 | return -EINVAL; |
| 818 | |
| 819 | sk->sk_bound_dev_if = usin->sin6_scope_id; |
| 820 | } |
| 821 | |
| 822 | /* Connect to link-local address requires an interface */ |
| 823 | if (!sk->sk_bound_dev_if) |
| 824 | return -EINVAL; |
| 825 | } |
| 826 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 827 | sk->sk_v6_daddr = usin->sin6_addr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 828 | np->flow_label = fl6.flowlabel; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 829 | |
| 830 | /* |
| 831 | * DCCP over IPv4 |
| 832 | */ |
| 833 | if (addr_type == IPV6_ADDR_MAPPED) { |
| 834 | u32 exthdrlen = icsk->icsk_ext_hdr_len; |
| 835 | struct sockaddr_in sin; |
| 836 | |
| 837 | SOCK_DEBUG(sk, "connect: ipv4 mapped\n"); |
| 838 | |
| 839 | if (__ipv6_only_sock(sk)) |
| 840 | return -ENETUNREACH; |
| 841 | |
| 842 | sin.sin_family = AF_INET; |
| 843 | sin.sin_port = usin->sin6_port; |
| 844 | sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3]; |
| 845 | |
| 846 | icsk->icsk_af_ops = &dccp_ipv6_mapped; |
| 847 | sk->sk_backlog_rcv = dccp_v4_do_rcv; |
| 848 | |
| 849 | err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin)); |
| 850 | if (err) { |
| 851 | icsk->icsk_ext_hdr_len = exthdrlen; |
| 852 | icsk->icsk_af_ops = &dccp_ipv6_af_ops; |
| 853 | sk->sk_backlog_rcv = dccp_v6_do_rcv; |
| 854 | goto failure; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 855 | } |
Eric Dumazet | d1e559d | 2015-03-18 14:05:35 -0700 | [diff] [blame] | 856 | np->saddr = sk->sk_v6_rcv_saddr; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 857 | return err; |
| 858 | } |
| 859 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 860 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) |
| 861 | saddr = &sk->sk_v6_rcv_saddr; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 862 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 863 | fl6.flowi6_proto = IPPROTO_DCCP; |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 864 | fl6.daddr = sk->sk_v6_daddr; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 865 | fl6.saddr = saddr ? *saddr : np->saddr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 866 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 867 | fl6.fl6_dport = usin->sin6_port; |
| 868 | fl6.fl6_sport = inet->inet_sport; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 869 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 870 | |
Hannes Frederic Sowa | 1e1d04e | 2016-04-05 17:10:15 +0200 | [diff] [blame] | 871 | opt = rcu_dereference_protected(np->opt, lockdep_sock_is_held(sk)); |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 872 | final_p = fl6_update_dst(&fl6, opt, &final); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 873 | |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 874 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 875 | if (IS_ERR(dst)) { |
| 876 | err = PTR_ERR(dst); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 877 | goto failure; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 878 | } |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 879 | |
| 880 | if (saddr == NULL) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 881 | saddr = &fl6.saddr; |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 882 | sk->sk_v6_rcv_saddr = *saddr; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | /* set the source address */ |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 886 | np->saddr = *saddr; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 887 | inet->inet_rcv_saddr = LOOPBACK4_IPV6; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 888 | |
Eric Dumazet | 6bd4f35 | 2015-12-02 21:53:57 -0800 | [diff] [blame] | 889 | ip6_dst_store(sk, dst, NULL, NULL); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 890 | |
| 891 | icsk->icsk_ext_hdr_len = 0; |
Eric Dumazet | 45f6fad | 2015-11-29 19:37:57 -0800 | [diff] [blame] | 892 | if (opt) |
| 893 | icsk->icsk_ext_hdr_len = opt->opt_flen + opt->opt_nflen; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 894 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 895 | inet->inet_dport = usin->sin6_port; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 896 | |
| 897 | dccp_set_state(sk, DCCP_REQUESTING); |
| 898 | err = inet6_hash_connect(&dccp_death_row, sk); |
| 899 | if (err) |
| 900 | goto late_failure; |
Gerrit Renker | d7f7365 | 2006-11-13 13:34:38 -0200 | [diff] [blame] | 901 | |
| 902 | dp->dccps_iss = secure_dccpv6_sequence_number(np->saddr.s6_addr32, |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 903 | sk->sk_v6_daddr.s6_addr32, |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 904 | inet->inet_sport, |
| 905 | inet->inet_dport); |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 906 | err = dccp_connect(sk); |
| 907 | if (err) |
| 908 | goto late_failure; |
| 909 | |
| 910 | return 0; |
| 911 | |
| 912 | late_failure: |
| 913 | dccp_set_state(sk, DCCP_CLOSED); |
| 914 | __sk_dst_reset(sk); |
| 915 | failure: |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 916 | inet->inet_dport = 0; |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 917 | sk->sk_route_caps = 0; |
| 918 | return err; |
| 919 | } |
| 920 | |
Stephen Hemminger | 3b401a8 | 2009-09-01 19:25:04 +0000 | [diff] [blame] | 921 | 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] | 922 | .queue_xmit = inet6_csk_xmit, |
| 923 | .send_check = dccp_v6_send_check, |
| 924 | .rebuild_header = inet6_sk_rebuild_header, |
| 925 | .conn_request = dccp_v6_conn_request, |
| 926 | .syn_recv_sock = dccp_v6_request_recv_sock, |
| 927 | .net_header_len = sizeof(struct ipv6hdr), |
| 928 | .setsockopt = ipv6_setsockopt, |
| 929 | .getsockopt = ipv6_getsockopt, |
| 930 | .addr2sockaddr = inet6_csk_addr2sockaddr, |
| 931 | .sockaddr_len = sizeof(struct sockaddr_in6), |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 932 | .bind_conflict = inet6_csk_bind_conflict, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 933 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 934 | .compat_setsockopt = compat_ipv6_setsockopt, |
| 935 | .compat_getsockopt = compat_ipv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 936 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 937 | }; |
| 938 | |
| 939 | /* |
| 940 | * DCCP over IPv4 via INET6 API |
| 941 | */ |
Stephen Hemminger | 3b401a8 | 2009-09-01 19:25:04 +0000 | [diff] [blame] | 942 | 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] | 943 | .queue_xmit = ip_queue_xmit, |
| 944 | .send_check = dccp_v4_send_check, |
| 945 | .rebuild_header = inet_sk_rebuild_header, |
| 946 | .conn_request = dccp_v6_conn_request, |
| 947 | .syn_recv_sock = dccp_v6_request_recv_sock, |
| 948 | .net_header_len = sizeof(struct iphdr), |
| 949 | .setsockopt = ipv6_setsockopt, |
| 950 | .getsockopt = ipv6_getsockopt, |
| 951 | .addr2sockaddr = inet6_csk_addr2sockaddr, |
| 952 | .sockaddr_len = sizeof(struct sockaddr_in6), |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 953 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 954 | .compat_setsockopt = compat_ipv6_setsockopt, |
| 955 | .compat_getsockopt = compat_ipv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 956 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 957 | }; |
| 958 | |
| 959 | /* NOTE: A lot of things set to zero explicitly by call to |
| 960 | * sk_alloc() so need not be done here. |
| 961 | */ |
| 962 | static int dccp_v6_init_sock(struct sock *sk) |
| 963 | { |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 964 | static __u8 dccp_v6_ctl_sock_initialized; |
| 965 | 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] | 966 | |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 967 | if (err == 0) { |
| 968 | if (unlikely(!dccp_v6_ctl_sock_initialized)) |
| 969 | dccp_v6_ctl_sock_initialized = 1; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 970 | inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops; |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 971 | } |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 972 | |
| 973 | return err; |
| 974 | } |
| 975 | |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 976 | static void dccp_v6_destroy_sock(struct sock *sk) |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 977 | { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 978 | dccp_destroy_sock(sk); |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 979 | inet6_destroy_sock(sk); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 980 | } |
| 981 | |
Gerrit Renker | 73c9e02 | 2006-11-10 13:01:31 -0200 | [diff] [blame] | 982 | static struct timewait_sock_ops dccp6_timewait_sock_ops = { |
| 983 | .twsk_obj_size = sizeof(struct dccp6_timewait_sock), |
| 984 | }; |
| 985 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 986 | static struct proto dccp_v6_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 987 | .name = "DCCPv6", |
| 988 | .owner = THIS_MODULE, |
| 989 | .close = dccp_close, |
| 990 | .connect = dccp_v6_connect, |
| 991 | .disconnect = dccp_disconnect, |
| 992 | .ioctl = dccp_ioctl, |
| 993 | .init = dccp_v6_init_sock, |
| 994 | .setsockopt = dccp_setsockopt, |
| 995 | .getsockopt = dccp_getsockopt, |
| 996 | .sendmsg = dccp_sendmsg, |
| 997 | .recvmsg = dccp_recvmsg, |
| 998 | .backlog_rcv = dccp_v6_do_rcv, |
Craig Gallek | 496611d | 2016-02-10 11:50:36 -0500 | [diff] [blame] | 999 | .hash = inet6_hash, |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 1000 | .unhash = inet_unhash, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1001 | .accept = inet_csk_accept, |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 1002 | .get_port = inet_csk_get_port, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1003 | .shutdown = dccp_shutdown, |
| 1004 | .destroy = dccp_v6_destroy_sock, |
| 1005 | .orphan_count = &dccp_orphan_count, |
| 1006 | .max_header = MAX_DCCP_HEADER, |
| 1007 | .obj_size = sizeof(struct dccp6_sock), |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 1008 | .slab_flags = SLAB_DESTROY_BY_RCU, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1009 | .rsk_prot = &dccp6_request_sock_ops, |
| 1010 | .twsk_prot = &dccp6_timewait_sock_ops, |
Pavel Emelyanov | 39d8cda | 2008-03-22 16:50:58 -0700 | [diff] [blame] | 1011 | .h.hashinfo = &dccp_hashinfo, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1012 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1013 | .compat_setsockopt = compat_dccp_setsockopt, |
| 1014 | .compat_getsockopt = compat_dccp_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1015 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1016 | }; |
| 1017 | |
Alexey Dobriyan | 41135cc | 2009-09-14 12:22:28 +0000 | [diff] [blame] | 1018 | static const struct inet6_protocol dccp_v6_protocol = { |
Arnaldo Carvalho de Melo | 45329e7 | 2006-03-20 22:01:29 -0800 | [diff] [blame] | 1019 | .handler = dccp_v6_rcv, |
| 1020 | .err_handler = dccp_v6_err, |
| 1021 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1022 | }; |
| 1023 | |
Alexey Dobriyan | 5708e86 | 2009-09-14 12:23:23 +0000 | [diff] [blame] | 1024 | static const struct proto_ops inet6_dccp_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1025 | .family = PF_INET6, |
| 1026 | .owner = THIS_MODULE, |
| 1027 | .release = inet6_release, |
| 1028 | .bind = inet6_bind, |
| 1029 | .connect = inet_stream_connect, |
| 1030 | .socketpair = sock_no_socketpair, |
| 1031 | .accept = inet_accept, |
| 1032 | .getname = inet6_getname, |
| 1033 | .poll = dccp_poll, |
| 1034 | .ioctl = inet6_ioctl, |
| 1035 | .listen = inet_dccp_listen, |
| 1036 | .shutdown = inet_shutdown, |
| 1037 | .setsockopt = sock_common_setsockopt, |
| 1038 | .getsockopt = sock_common_getsockopt, |
| 1039 | .sendmsg = inet_sendmsg, |
| 1040 | .recvmsg = sock_common_recvmsg, |
| 1041 | .mmap = sock_no_mmap, |
| 1042 | .sendpage = sock_no_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1043 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1044 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 1045 | .compat_getsockopt = compat_sock_common_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1046 | #endif |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1047 | }; |
| 1048 | |
| 1049 | static struct inet_protosw dccp_v6_protosw = { |
| 1050 | .type = SOCK_DCCP, |
| 1051 | .protocol = IPPROTO_DCCP, |
| 1052 | .prot = &dccp_v6_prot, |
| 1053 | .ops = &inet6_dccp_ops, |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 1054 | .flags = INET_PROTOSW_ICSK, |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1055 | }; |
| 1056 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1057 | static int __net_init dccp_v6_init_net(struct net *net) |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1058 | { |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1059 | if (dccp_hashinfo.bhash == NULL) |
| 1060 | return -ESOCKTNOSUPPORT; |
Pavel Emelyanov | 334527d | 2008-04-13 22:32:45 -0700 | [diff] [blame] | 1061 | |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1062 | return inet_ctl_sock_create(&net->dccp.v6_ctl_sk, PF_INET6, |
| 1063 | SOCK_DCCP, IPPROTO_DCCP, net); |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1064 | } |
| 1065 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1066 | static void __net_exit dccp_v6_exit_net(struct net *net) |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1067 | { |
Pavel Emelyanov | 334527d | 2008-04-13 22:32:45 -0700 | [diff] [blame] | 1068 | inet_ctl_sock_destroy(net->dccp.v6_ctl_sk); |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1069 | } |
| 1070 | |
| 1071 | static struct pernet_operations dccp_v6_ops = { |
| 1072 | .init = dccp_v6_init_net, |
| 1073 | .exit = dccp_v6_exit_net, |
| 1074 | }; |
| 1075 | |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1076 | static int __init dccp_v6_init(void) |
| 1077 | { |
| 1078 | int err = proto_register(&dccp_v6_prot, 1); |
| 1079 | |
| 1080 | if (err != 0) |
| 1081 | goto out; |
| 1082 | |
| 1083 | err = inet6_add_protocol(&dccp_v6_protocol, IPPROTO_DCCP); |
| 1084 | if (err != 0) |
| 1085 | goto out_unregister_proto; |
| 1086 | |
| 1087 | inet6_register_protosw(&dccp_v6_protosw); |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1088 | |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1089 | err = register_pernet_subsys(&dccp_v6_ops); |
| 1090 | if (err != 0) |
| 1091 | goto out_destroy_ctl_sock; |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1092 | out: |
| 1093 | return err; |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1094 | |
| 1095 | out_destroy_ctl_sock: |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 1096 | inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP); |
| 1097 | inet6_unregister_protosw(&dccp_v6_protosw); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1098 | out_unregister_proto: |
| 1099 | proto_unregister(&dccp_v6_prot); |
| 1100 | goto out; |
| 1101 | } |
| 1102 | |
| 1103 | static void __exit dccp_v6_exit(void) |
| 1104 | { |
Pavel Emelyanov | 8231bd2 | 2008-04-13 22:32:02 -0700 | [diff] [blame] | 1105 | unregister_pernet_subsys(&dccp_v6_ops); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1106 | inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP); |
| 1107 | inet6_unregister_protosw(&dccp_v6_protosw); |
| 1108 | proto_unregister(&dccp_v6_prot); |
| 1109 | } |
| 1110 | |
| 1111 | module_init(dccp_v6_init); |
| 1112 | module_exit(dccp_v6_exit); |
| 1113 | |
| 1114 | /* |
| 1115 | * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33) |
| 1116 | * values directly, Also cover the case where the protocol is not specified, |
| 1117 | * i.e. net-pf-PF_INET6-proto-0-type-SOCK_DCCP |
| 1118 | */ |
Jean Delvare | 7131c6c | 2007-10-21 16:45:03 -0700 | [diff] [blame] | 1119 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 33, 6); |
| 1120 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_INET6, 0, 6); |
Arnaldo Carvalho de Melo | 3df80d9 | 2005-12-13 23:24:53 -0800 | [diff] [blame] | 1121 | MODULE_LICENSE("GPL"); |
| 1122 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); |
| 1123 | MODULE_DESCRIPTION("DCCPv6 - Datagram Congestion Controlled Protocol"); |