^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * (C) Copyright IBM Corp. 2002, 2004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2001 Nokia, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2001 La Monte H.P. Yarroll
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2002-2003 Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This file is part of the SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * SCTP over IPv6.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Please send any bug reports or fixes you make to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * email address(es):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * lksctp developers <linux-sctp@vger.kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Written or modified by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Le Yanqun <yanqun.le@nokia.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Hui Huang <hui.huang@nokia.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * La Monte H.P. Yarroll <piggy@acm.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Sridhar Samudrala <sri@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Jon Grimm <jgrimm@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Ardelle Fan <ardelle.fan@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Based on:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * linux/net/ipv6/tcp_ipv6.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/sockios.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/in6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/ipsec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/icmpv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <net/protocol.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <net/ndisc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <net/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <net/transp_v6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <net/addrconf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <net/ip6_route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <net/inet_common.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <net/inet_ecn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <net/sctp/sctp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static inline int sctp_v6_addr_match_len(union sctp_addr *s1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) union sctp_addr *s2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) __be16 port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) const union sctp_addr *addr2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* Event handler for inet6 address addition/deletion events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * The sctp_local_addr_list needs to be protocted by a spin lock since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * multiple notifiers (say IPv4 and IPv6) may be running at the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * time and thus corrupt the list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * The reader side is protected with RCU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct sctp_sockaddr_entry *addr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct sctp_sockaddr_entry *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct net *net = dev_net(ifa->idev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int found = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) switch (ev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case NETDEV_UP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) addr->a.v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) addr->a.v6.sin6_addr = ifa->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) addr->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) spin_lock_bh(&net->sctp.local_addr_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) spin_unlock_bh(&net->sctp.local_addr_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) case NETDEV_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) spin_lock_bh(&net->sctp.local_addr_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) list_for_each_entry_safe(addr, temp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) &net->sctp.local_addr_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (addr->a.sa.sa_family == AF_INET6 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ipv6_addr_equal(&addr->a.v6.sin6_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) &ifa->addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) addr->valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) list_del_rcu(&addr->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) spin_unlock_bh(&net->sctp.local_addr_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (found)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) kfree_rcu(addr, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static struct notifier_block sctp_inet6addr_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .notifier_call = sctp_inet6addr_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* ICMP error handler. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) u8 type, u8 code, int offset, __be32 info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct inet6_dev *idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct sctp_association *asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct sctp_transport *transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct ipv6_pinfo *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) __u16 saveip, savesctp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int err, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct net *net = dev_net(skb->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) idev = in6_dev_get(skb->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* Fix up skb to look at the embedded net header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) saveip = skb->network_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) savesctp = skb->transport_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) skb_set_transport_header(skb, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /* Put back, the original pointers. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) skb->network_header = saveip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) skb->transport_header = savesctp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (!sk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) __ICMP6_INC_STATS(net, idev, ICMP6_MIB_INERRORS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /* Warning: The sock lock is held. Remember to call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * sctp_err_finish!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) case ICMPV6_PKT_TOOBIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (ip6_sk_accept_pmtu(sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) case ICMPV6_PARAMPROB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (ICMPV6_UNK_NEXTHDR == code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) sctp_icmp_proto_unreachable(sk, asoc, transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) case NDISC_REDIRECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) sctp_icmp_redirect(sk, transport, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) np = inet6_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) icmpv6_err_convert(type, code, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (!sock_owned_by_user(sk) && np->recverr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) sk->sk_err = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) sk->sk_error_report(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) } else { /* Only an error on timeout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) sk->sk_err_soft = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) sctp_err_finish(sk, transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (likely(idev != NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) in6_dev_put(idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) struct sock *sk = skb->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct ipv6_pinfo *np = inet6_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct flowi6 *fl6 = &transport->fl.u.ip6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) __u8 tclass = np->tclass;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) skb->len, &fl6->saddr, &fl6->daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (transport->dscp & SCTP_DSCP_SET_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) tclass = transport->dscp & SCTP_DSCP_VAL_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (INET_ECN_is_capable(tclass))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) IP6_ECN_flow_xmit(sk, fl6->flowlabel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (!(transport->param_flags & SPP_PMTUD_ENABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) skb->ignore_df = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) tclass, sk->sk_priority);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /* Returns the dst cache entry for the given source and destination ip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct flowi *fl, struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct sctp_association *asoc = t->asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct dst_entry *dst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct flowi _fl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct flowi6 *fl6 = &_fl.u.ip6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct sctp_bind_addr *bp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct ipv6_pinfo *np = inet6_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct sctp_sockaddr_entry *laddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) union sctp_addr *daddr = &t->ipaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) union sctp_addr dst_saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct in6_addr *final_p, final;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) enum sctp_scope scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) __u8 matchlen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) memset(&_fl, 0, sizeof(_fl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) fl6->daddr = daddr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) fl6->fl6_dport = daddr->v6.sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) fl6->flowi6_proto = IPPROTO_SCTP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) fl6->flowi6_oif = daddr->v6.sin6_scope_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) else if (asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (t->flowlabel & SCTP_FLOWLABEL_SET_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) fl6->flowlabel = htonl(t->flowlabel & SCTP_FLOWLABEL_VAL_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (np->sndflow && (fl6->flowlabel & IPV6_FLOWLABEL_MASK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct ip6_flowlabel *flowlabel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) flowlabel = fl6_sock_lookup(sk, fl6->flowlabel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (IS_ERR(flowlabel))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) fl6_sock_release(flowlabel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) fl6->fl6_sport = htons(asoc->base.bind_addr.port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (saddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) fl6->saddr = saddr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (!fl6->fl6_sport)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) fl6->fl6_sport = saddr->v6.sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) pr_debug("src=%pI6 - ", &fl6->saddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) dst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (!asoc || saddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) t->dst = dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) memcpy(fl, &_fl, sizeof(_fl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) bp = &asoc->base.bind_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) scope = sctp_scope(daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /* ip6_dst_lookup has filled in the fl6->saddr for us. Check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * to see if we can use it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (!IS_ERR(dst)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /* Walk through the bind address list and look for a bind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * address that matches the source address of the returned dst.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) list_for_each_entry_rcu(laddr, &bp->address_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (!laddr->valid || laddr->state == SCTP_ADDR_DEL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) (laddr->state != SCTP_ADDR_SRC &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) !asoc->src_out_of_asoc_ok))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /* Do not compare against v4 addrs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if ((laddr->a.sa.sa_family == AF_INET6) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) t->dst = dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) memcpy(fl, &_fl, sizeof(_fl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* None of the bound addresses match the source address of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * dst. So release it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) dst_release(dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) dst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) /* Walk through the bind address list and try to get the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * best source address for a given destination.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) list_for_each_entry_rcu(laddr, &bp->address_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct dst_entry *bdst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) __u8 bmatchlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (!laddr->valid ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) laddr->state != SCTP_ADDR_SRC ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) laddr->a.sa.sa_family != AF_INET6 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) scope > sctp_scope(&laddr->a))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) fl6->saddr = laddr->a.v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) fl6->fl6_sport = laddr->a.v6.sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) bdst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (IS_ERR(bdst))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (ipv6_chk_addr(dev_net(bdst->dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) &laddr->a.v6.sin6_addr, bdst->dev, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (!IS_ERR_OR_NULL(dst))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) dst_release(dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) dst = bdst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) t->dst = dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) memcpy(fl, &_fl, sizeof(_fl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (matchlen > bmatchlen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) dst_release(bdst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (!IS_ERR_OR_NULL(dst))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) dst_release(dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) dst = bdst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) matchlen = bmatchlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) t->dst = dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) memcpy(fl, &_fl, sizeof(_fl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (!IS_ERR_OR_NULL(dst)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) struct rt6_info *rt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) rt = (struct rt6_info *)dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) t->dst_cookie = rt6_get_cookie(rt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) pr_debug("rt6_dst:%pI6/%d rt6_src:%pI6\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) &rt->rt6i_dst.addr, rt->rt6i_dst.plen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) &fl->u.ip6.saddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) t->dst = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) pr_debug("no route\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /* Returns the number of consecutive initial bits that match in the 2 ipv6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static inline int sctp_v6_addr_match_len(union sctp_addr *s1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) union sctp_addr *s2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* Fills in the source address(saddr) based on the destination address(daddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * and asoc's bind address list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) static void sctp_v6_get_saddr(struct sctp_sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct sctp_transport *t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct flowi *fl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct flowi6 *fl6 = &fl->u.ip6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) union sctp_addr *saddr = &t->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (t->dst) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) saddr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) saddr->v6.sin6_addr = fl6->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) /* Make a copy of all potential local addresses. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) static void sctp_v6_copy_addrlist(struct list_head *addrlist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) struct inet6_dev *in6_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) struct inet6_ifaddr *ifp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) struct sctp_sockaddr_entry *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if ((in6_dev = __in6_dev_get(dev)) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) read_lock_bh(&in6_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) /* Add the address to the local list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) addr = kzalloc(sizeof(*addr), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) addr->a.v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) addr->a.v6.sin6_addr = ifp->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) addr->a.v6.sin6_scope_id = dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) addr->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) INIT_LIST_HEAD(&addr->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) list_add_tail(&addr->list, addrlist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) read_unlock_bh(&in6_dev->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /* Copy over any ip options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static void sctp_v6_copy_ip_options(struct sock *sk, struct sock *newsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct ipv6_txoptions *opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) newnp = inet6_sk(newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) opt = rcu_dereference(np->opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) if (opt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) opt = ipv6_dup_options(newsk, opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (!opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) pr_err("%s: Failed to copy ip options\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) RCU_INIT_POINTER(newnp->opt, opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) /* Account for the IP options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) static int sctp_v6_ip_options_len(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct ipv6_pinfo *np = inet6_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) struct ipv6_txoptions *opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) opt = rcu_dereference(np->opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) len = opt->opt_flen + opt->opt_nflen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) /* Initialize a sockaddr_storage from in incoming skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) static void sctp_v6_from_skb(union sctp_addr *addr, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) int is_saddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) /* Always called on head skb, so this is safe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct sctphdr *sh = sctp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) struct sockaddr_in6 *sa = &addr->v6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) addr->v6.sin6_flowinfo = 0; /* FIXME */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (is_saddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) sa->sin6_port = sh->source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) sa->sin6_addr = ipv6_hdr(skb)->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) sa->sin6_port = sh->dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) sa->sin6_addr = ipv6_hdr(skb)->daddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /* Initialize an sctp_addr from a socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) addr->v6.sin6_port = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) addr->v6.sin6_addr = sk->sk_v6_rcv_saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) /* Initialize sk->sk_rcv_saddr from sctp_addr. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (addr->sa.sa_family == AF_INET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) sk->sk_v6_rcv_saddr.s6_addr32[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) sk->sk_v6_rcv_saddr.s6_addr32[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) sk->sk_v6_rcv_saddr.s6_addr32[2] = htonl(0x0000ffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) sk->sk_v6_rcv_saddr.s6_addr32[3] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) addr->v4.sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) sk->sk_v6_rcv_saddr = addr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) /* Initialize sk->sk_daddr from sctp_addr. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (addr->sa.sa_family == AF_INET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) sk->sk_v6_daddr.s6_addr32[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) sk->sk_v6_daddr.s6_addr32[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) sk->sk_v6_daddr.s6_addr32[2] = htonl(0x0000ffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) sk->sk_v6_daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) sk->sk_v6_daddr = addr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) /* Initialize a sctp_addr from an address parameter. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) static bool sctp_v6_from_addr_param(union sctp_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) union sctp_addr_param *param,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) __be16 port, int iif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (ntohs(param->v6.param_hdr.length) < sizeof(struct sctp_ipv6addr_param))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) addr->v6.sin6_port = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) addr->v6.sin6_flowinfo = 0; /* BUG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) addr->v6.sin6_addr = param->v6.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) addr->v6.sin6_scope_id = iif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /* Initialize an address parameter from a sctp_addr and return the length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * of the address parameter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) static int sctp_v6_to_addr_param(const union sctp_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) union sctp_addr_param *param)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) int length = sizeof(struct sctp_ipv6addr_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) param->v6.param_hdr.length = htons(length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) param->v6.addr = addr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /* Initialize a sctp_addr from struct in6_addr. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) __be16 port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) addr->sa.sa_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) addr->v6.sin6_port = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) addr->v6.sin6_flowinfo = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) addr->v6.sin6_addr = *saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) addr->v6.sin6_scope_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) static int __sctp_v6_cmp_addr(const union sctp_addr *addr1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) const union sctp_addr *addr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (addr1->sa.sa_family != addr2->sa.sa_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (addr1->sa.sa_family == AF_INET &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) addr2->sa.sa_family == AF_INET6 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) ipv6_addr_v4mapped(&addr2->v6.sin6_addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) addr2->v6.sin6_addr.s6_addr32[3] ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) addr1->v4.sin_addr.s_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (addr2->sa.sa_family == AF_INET &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) addr1->sa.sa_family == AF_INET6 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) ipv6_addr_v4mapped(&addr1->v6.sin6_addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) addr1->v6.sin6_addr.s6_addr32[3] ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) addr2->v4.sin_addr.s_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) /* If this is a linklocal address, compare the scope_id. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if ((ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) /* Compare addresses exactly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * v4-mapped-v6 is also in consideration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) const union sctp_addr *addr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) return __sctp_v6_cmp_addr(addr1, addr2) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) addr1->v6.sin6_port == addr2->v6.sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /* Initialize addr struct to INADDR_ANY. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) memset(addr, 0x00, sizeof(union sctp_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) addr->v6.sin6_port = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) /* Is this a wildcard address? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) static int sctp_v6_is_any(const union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return ipv6_addr_any(&addr->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) /* Should this be available for binding? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) struct net *net = sock_net(&sp->inet.sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) type = ipv6_addr_type(in6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (IPV6_ADDR_ANY == type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (type == IPV6_ADDR_MAPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) sctp_v6_map_v4(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) return sctp_get_af_specific(AF_INET)->available(addr, sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) if (!(type & IPV6_ADDR_UNICAST))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return ipv6_can_nonlocal_bind(net, &sp->inet) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) ipv6_chk_addr(net, in6, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) /* This function checks if the address is a valid address to be used for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) * SCTP.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * Output:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * Return 0 - If the address is a non-unicast or an illegal address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * Return 1 - If the address is a unicast.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) static int sctp_v6_addr_valid(union sctp_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) struct sctp_sock *sp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) const struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) int ret = ipv6_addr_type(&addr->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) /* Support v4-mapped-v6 address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (ret == IPV6_ADDR_MAPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) /* Note: This routine is used in input, so v4-mapped-v6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) * are disallowed here when there is no sctp_sock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) sctp_v6_map_v4(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) /* Is this a non-unicast address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (!(ret & IPV6_ADDR_UNICAST))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) /* What is the scope of 'addr'? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) static enum sctp_scope sctp_v6_scope(union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) enum sctp_scope retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) int v6scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) /* The IPv6 scope is really a set of bit fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) v6scope = ipv6_addr_scope(&addr->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) switch (v6scope) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) case IFA_HOST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) retval = SCTP_SCOPE_LOOPBACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) case IFA_LINK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) retval = SCTP_SCOPE_LINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) case IFA_SITE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) retval = SCTP_SCOPE_PRIVATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) retval = SCTP_SCOPE_GLOBAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /* Create and initialize a new sk for the socket to be returned by accept(). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) bool kern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) struct sock *newsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) struct sctp6_sock *newsctp6sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot, kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (!newsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) sock_init_data(NULL, newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) sctp_copy_sock(newsk, sk, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) sock_reset_flag(sk, SOCK_ZAPPED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) newsctp6sk = (struct sctp6_sock *)newsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) inet_sk(newsk)->pinet6 = &newsctp6sk->inet6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) newnp = inet6_sk(newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) memcpy(newnp, np, sizeof(struct ipv6_pinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) newnp->ipv6_mc_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) newnp->ipv6_ac_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) newnp->ipv6_fl_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) sctp_v6_copy_ip_options(sk, newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) * and getpeername().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) sk_refcnt_debug_inc(newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) if (newsk->sk_prot->init(newsk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) sk_common_release(newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) newsk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) return newsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) /* Format a sockaddr for return to user space. This makes sure the return is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) * AF_INET or AF_INET6 depending on the SCTP_I_WANT_MAPPED_V4_ADDR option.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) static int sctp_v6_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) if (sp->v4mapped) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (addr->sa.sa_family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) sctp_v4_map_v6(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) if (addr->sa.sa_family == AF_INET6 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) ipv6_addr_v4mapped(&addr->v6.sin6_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) sctp_v6_map_v4(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (addr->sa.sa_family == AF_INET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return sizeof(struct sockaddr_in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return sizeof(struct sockaddr_in6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) /* Where did this skb come from? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) static int sctp_v6_skb_iif(const struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) return IP6CB(skb)->iif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) /* Was this packet marked by Explicit Congestion Notification? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) static int sctp_v6_is_ce(const struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) return *((__u32 *)(ipv6_hdr(skb))) & (__force __u32)htonl(1 << 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) /* Dump the v6 addr to the seq file. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) static void sctp_v6_ecn_capable(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) inet6_sk(sk)->tclass |= INET_ECN_ECT_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) /* Initialize a PF_INET msgname from a ulpevent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) static void sctp_inet6_event_msgname(struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) char *msgname, int *addrlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) union sctp_addr *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) struct sctp_association *asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) union sctp_addr *paddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (!msgname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) addr = (union sctp_addr *)msgname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) asoc = event->asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) paddr = &asoc->peer.primary_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) if (paddr->sa.sa_family == AF_INET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) addr->v4.sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) addr->v4.sin_port = htons(asoc->peer.port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) addr->v4.sin_addr = paddr->v4.sin_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) addr->v6.sin6_flowinfo = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (ipv6_addr_type(&paddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) addr->v6.sin6_scope_id = paddr->v6.sin6_scope_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) addr->v6.sin6_scope_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) addr->v6.sin6_port = htons(asoc->peer.port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) addr->v6.sin6_addr = paddr->v6.sin6_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) *addrlen = sctp_v6_addr_to_user(sctp_sk(asoc->base.sk), addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) /* Initialize a msg_name from an inbound skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) int *addr_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) union sctp_addr *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) struct sctphdr *sh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (!msgname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) addr = (union sctp_addr *)msgname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) sh = sctp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (ip_hdr(skb)->version == 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) addr->v4.sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) addr->v4.sin_port = sh->source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) addr->v4.sin_addr.s_addr = ip_hdr(skb)->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) addr->v6.sin6_flowinfo = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) addr->v6.sin6_port = sh->source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) addr->v6.sin6_addr = ipv6_hdr(skb)->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) if (ipv6_addr_type(&addr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) addr->v6.sin6_scope_id = sctp_v6_skb_iif(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) addr->v6.sin6_scope_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) *addr_len = sctp_v6_addr_to_user(sctp_sk(skb->sk), addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) /* Do we support this AF? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) switch (family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) /* v4-mapped-v6 addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) if (!__ipv6_only_sock(sctp_opt2sk(sp)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) /* Address matching with wildcards allowed. This extra level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) * of indirection lets us choose whether a PF_INET6 should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) * disallow any v4 addresses if we so choose.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) static int sctp_inet6_cmp_addr(const union sctp_addr *addr1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) const union sctp_addr *addr2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) struct sctp_sock *opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) struct sock *sk = sctp_opt2sk(opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) struct sctp_af *af1, *af2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) af1 = sctp_get_af_specific(addr1->sa.sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) af2 = sctp_get_af_specific(addr2->sa.sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) if (!af1 || !af2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) /* If the socket is IPv6 only, v4 addrs will not match */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (__ipv6_only_sock(sk) && af1 != af2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) /* Today, wildcard AF_INET/AF_INET6. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) if (addr1->sa.sa_family == AF_INET && addr2->sa.sa_family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) return addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) return __sctp_v6_cmp_addr(addr1, addr2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) /* Verify that the provided sockaddr looks bindable. Common verification,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) * has already been taken care of.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) struct sctp_af *af;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) /* ASSERT: address family has already been verified. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (addr->sa.sa_family != AF_INET6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) af = sctp_get_af_specific(addr->sa.sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) int type = ipv6_addr_type(&addr->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) if (type & IPV6_ADDR_LINKLOCAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) struct net *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) if (!addr->v6.sin6_scope_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) net = sock_net(&opt->inet.sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) if (!dev || !(ipv6_can_nonlocal_bind(net, &opt->inet) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) ipv6_chk_addr(net, &addr->v6.sin6_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) dev, 0))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) af = opt->pf->af;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) return af->available(addr, opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) /* Verify that the provided sockaddr looks sendable. Common verification,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) * has already been taken care of.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) struct sctp_af *af = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) /* ASSERT: address family has already been verified. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) if (addr->sa.sa_family != AF_INET6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) af = sctp_get_af_specific(addr->sa.sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) int type = ipv6_addr_type(&addr->v6.sin6_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) if (type & IPV6_ADDR_LINKLOCAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (!addr->v6.sin6_scope_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) addr->v6.sin6_scope_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) af = opt->pf->af;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) return af != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) /* Fill in Supported Address Type information for INIT and INIT-ACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) * chunks. Note: In the future, we may want to look at sock options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) * to determine whether a PF_INET6 socket really wants to have IPV4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) * addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) * Returns number of addresses supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) static int sctp_inet6_supported_addrs(const struct sctp_sock *opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) __be16 *types)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) types[0] = SCTP_PARAM_IPV6_ADDRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) types[1] = SCTP_PARAM_IPV4_ADDRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) return 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) /* Handle SCTP_I_WANT_MAPPED_V4_ADDR for getpeername() and getsockname() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) static int sctp_getname(struct socket *sock, struct sockaddr *uaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) int peer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) rc = inet6_getname(sock, uaddr, peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) rc = sctp_v6_addr_to_user(sctp_sk(sock->sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) (union sctp_addr *)uaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) static const struct proto_ops inet6_seqpacket_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) .family = PF_INET6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) .release = inet6_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) .bind = inet6_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) .connect = sctp_inet_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) .socketpair = sock_no_socketpair,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) .accept = inet_accept,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) .getname = sctp_getname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) .poll = sctp_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) .ioctl = inet6_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) .gettstamp = sock_gettstamp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) .listen = sctp_inet_listen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) .shutdown = inet_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) .setsockopt = sock_common_setsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) .getsockopt = sock_common_getsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) .sendmsg = inet_sendmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) .recvmsg = inet_recvmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) .mmap = sock_no_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) .compat_ioctl = inet6_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) static struct inet_protosw sctpv6_seqpacket_protosw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) .type = SOCK_SEQPACKET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) .protocol = IPPROTO_SCTP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) .prot = &sctpv6_prot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) .ops = &inet6_seqpacket_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) .flags = SCTP_PROTOSW_FLAG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) static struct inet_protosw sctpv6_stream_protosw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) .type = SOCK_STREAM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) .protocol = IPPROTO_SCTP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) .prot = &sctpv6_prot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) .ops = &inet6_seqpacket_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) .flags = SCTP_PROTOSW_FLAG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) static int sctp6_rcv(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) return sctp_rcv(skb) ? -1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) static const struct inet6_protocol sctpv6_protocol = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) .handler = sctp6_rcv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) .err_handler = sctp_v6_err,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) static struct sctp_af sctp_af_inet6 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) .sa_family = AF_INET6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) .sctp_xmit = sctp_v6_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) .setsockopt = ipv6_setsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) .getsockopt = ipv6_getsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) .get_dst = sctp_v6_get_dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) .get_saddr = sctp_v6_get_saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) .copy_addrlist = sctp_v6_copy_addrlist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) .from_skb = sctp_v6_from_skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) .from_sk = sctp_v6_from_sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) .from_addr_param = sctp_v6_from_addr_param,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) .to_addr_param = sctp_v6_to_addr_param,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) .cmp_addr = sctp_v6_cmp_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) .scope = sctp_v6_scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) .addr_valid = sctp_v6_addr_valid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) .inaddr_any = sctp_v6_inaddr_any,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) .is_any = sctp_v6_is_any,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) .available = sctp_v6_available,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) .skb_iif = sctp_v6_skb_iif,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) .is_ce = sctp_v6_is_ce,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) .seq_dump_addr = sctp_v6_seq_dump_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) .ecn_capable = sctp_v6_ecn_capable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) .net_header_len = sizeof(struct ipv6hdr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) .sockaddr_len = sizeof(struct sockaddr_in6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) .ip_options_len = sctp_v6_ip_options_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) static struct sctp_pf sctp_pf_inet6 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) .event_msgname = sctp_inet6_event_msgname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) .skb_msgname = sctp_inet6_skb_msgname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) .af_supported = sctp_inet6_af_supported,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) .cmp_addr = sctp_inet6_cmp_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) .bind_verify = sctp_inet6_bind_verify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) .send_verify = sctp_inet6_send_verify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) .supported_addrs = sctp_inet6_supported_addrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) .create_accept_sk = sctp_v6_create_accept_sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) .addr_to_user = sctp_v6_addr_to_user,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) .to_sk_saddr = sctp_v6_to_sk_saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) .to_sk_daddr = sctp_v6_to_sk_daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) .copy_ip_options = sctp_v6_copy_ip_options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) .af = &sctp_af_inet6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) /* Initialize IPv6 support and register with socket layer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) void sctp_v6_pf_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) /* Register the SCTP specific PF_INET6 functions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) sctp_register_pf(&sctp_pf_inet6, PF_INET6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) /* Register the SCTP specific AF_INET6 functions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) sctp_register_af(&sctp_af_inet6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) void sctp_v6_pf_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) list_del(&sctp_af_inet6.list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) /* Initialize IPv6 support and register with socket layer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) int sctp_v6_protosw_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) rc = proto_register(&sctpv6_prot, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) inet6_register_protosw(&sctpv6_seqpacket_protosw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) inet6_register_protosw(&sctpv6_stream_protosw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) void sctp_v6_protosw_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) inet6_unregister_protosw(&sctpv6_seqpacket_protosw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) inet6_unregister_protosw(&sctpv6_stream_protosw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) proto_unregister(&sctpv6_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) /* Register with inet6 layer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) int sctp_v6_add_protocol(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) /* Register notifier for inet6 address additions/deletions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) register_inet6addr_notifier(&sctp_inet6addr_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) /* Unregister with inet6 layer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) void sctp_v6_del_protocol(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) unregister_inet6addr_notifier(&sctp_inet6addr_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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