| /* SCTP kernel reference Implementation |
| * Copyright (c) 2001 Nokia, Inc. |
| * Copyright (c) 2001 La Monte H.P. Yarroll |
| * Copyright (c) 2002 International Business Machines, Corp. |
| * |
| * This file is part of the SCTP kernel reference Implementation |
| * |
| * SCTP over IPv6. |
| * |
| * The SCTP reference implementation is free software; |
| * you can redistribute it and/or modify it under the terms of |
| * the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * The SCTP reference implementation is distributed in the hope that it |
| * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| * ************************ |
| * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * See the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with GNU CC; see the file COPYING. If not, write to |
| * the Free Software Foundation, 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| * |
| * Please send any bug reports or fixes you make to the |
| * email address(es): |
| * lksctp developers <lksctp-developers@lists.sourceforge.net> |
| * |
| * Or submit a bug report through the following website: |
| * http://www.sf.net/projects/lksctp |
| * |
| * Written or modified by: |
| * Le Yanqun <yanqun.le@nokia.com> |
| * Hui Huang <hui.huang@nokia.com> |
| * La Monte H.P. Yarroll <piggy@acm.org> |
| * Sridhar Samudrala <sri@us.ibm.com> |
| * Jon Grimm <jgrimm@us.ibm.com> |
| * |
| * Based on: |
| * linux/net/ipv6/tcp_ipv6.c |
| * |
| * Any bugs reported given to us we will try to fix... any fixes shared will |
| * be incorporated into the next SCTP release. |
| */ |
| |
| #define __NO_VERSION__ |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/socket.h> |
| #include <linux/sockios.h> |
| #include <linux/net.h> |
| #include <linux/sched.h> |
| #include <linux/in.h> |
| #include <linux/in6.h> |
| #include <linux/netdevice.h> |
| #include <linux/init.h> |
| #include <linux/ipsec.h> |
| |
| #include <linux/ipv6.h> |
| #include <linux/icmpv6.h> |
| #include <linux/random.h> |
| |
| #include <net/protocol.h> |
| #include <net/tcp.h> |
| #include <net/ndisc.h> |
| #include <net/ipv6.h> |
| #include <net/transp_v6.h> |
| #include <net/addrconf.h> |
| #include <net/ip6_route.h> |
| #include <net/inet_common.h> |
| #include <net/inet_ecn.h> |
| #include <net/sctp/sctp.h> |
| |
| #include <asm/uaccess.h> |
| |
| extern struct notifier_block sctp_inetaddr_notifier; |
| |
| /* FIXME: This macro needs to be moved to a common header file. */ |
| #define NIP6(addr) \ |
| ntohs((addr)->s6_addr16[0]), \ |
| ntohs((addr)->s6_addr16[1]), \ |
| ntohs((addr)->s6_addr16[2]), \ |
| ntohs((addr)->s6_addr16[3]), \ |
| ntohs((addr)->s6_addr16[4]), \ |
| ntohs((addr)->s6_addr16[5]), \ |
| ntohs((addr)->s6_addr16[6]), \ |
| ntohs((addr)->s6_addr16[7]) |
| |
| /* FIXME: Comments. */ |
| static inline void sctp_v6_err(struct sk_buff *skb, |
| struct inet6_skb_parm *opt, |
| int type, int code, int offset, __u32 info) |
| { |
| /* BUG. WRITE ME. */ |
| } |
| |
| /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ |
| static inline int sctp_v6_xmit(struct sk_buff *skb, |
| struct sctp_transport *transport, int ipfragok) |
| { |
| struct sock *sk = skb->sk; |
| struct ipv6_pinfo *np = inet6_sk(sk); |
| struct flowi fl; |
| struct dst_entry *dst = skb->dst; |
| struct rt6_info *rt6 = (struct rt6_info *)dst; |
| |
| fl.proto = sk->protocol; |
| |
| /* Fill in the dest address from the route entry passed with the skb |
| * and the source address from the transport. |
| */ |
| fl.fl6_dst = &rt6->rt6i_dst.addr; |
| fl.fl6_src = &transport->saddr.v6.sin6_addr; |
| |
| fl.fl6_flowlabel = np->flow_label; |
| IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel); |
| fl.oif = sk->bound_dev_if; |
| fl.uli_u.ports.sport = inet_sk(sk)->sport; |
| fl.uli_u.ports.dport = inet_sk(sk)->dport; |
| |
| if (np->opt && np->opt->srcrt) { |
| struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; |
| fl.nl_u.ip6_u.daddr = rt0->addr; |
| } |
| |
| SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, " |
| "src:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x " |
| "dst:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", |
| __FUNCTION__, skb, skb->len, NIP6(fl.fl6_src), |
| NIP6(fl.fl6_dst)); |
| |
| return ip6_xmit(sk, skb, &fl, np->opt); |
| } |
| |
| /* Returns the dst cache entry for the given source and destination ip |
| * addresses. |
| */ |
| struct dst_entry *sctp_v6_get_dst(sctp_association_t *asoc, |
| union sctp_addr *daddr, |
| union sctp_addr *saddr) |
| { |
| struct dst_entry *dst; |
| struct flowi fl = { |
| .nl_u = { .ip6_u = { .daddr = &daddr->v6.sin6_addr, } } }; |
| |
| SCTP_DEBUG_PRINTK("%s: DST=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", |
| __FUNCTION__, NIP6(fl.fl6_dst)); |
| |
| if (saddr) { |
| fl.fl6_src = &saddr->v6.sin6_addr; |
| SCTP_DEBUG_PRINTK( |
| "SRC=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x - ", |
| NIP6(fl.fl6_src)); |
| } |
| |
| dst = ip6_route_output(NULL, &fl); |
| if (dst) { |
| struct rt6_info *rt; |
| rt = (struct rt6_info *)dst; |
| SCTP_DEBUG_PRINTK( |
| "rt6_dst:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x " |
| "rt6_src:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", |
| NIP6(&rt->rt6i_dst.addr), NIP6(&rt->rt6i_src.addr)); |
| } else { |
| SCTP_DEBUG_PRINTK("NO ROUTE\n"); |
| } |
| |
| return dst; |
| } |
| |
| /* Returns the number of consecutive initial bits that match in the 2 ipv6 |
| * addresses. |
| */ |
| static inline int sctp_v6_addr_match_len(union sctp_addr *s1, |
| union sctp_addr *s2) |
| { |
| struct in6_addr *a1 = &s1->v6.sin6_addr; |
| struct in6_addr *a2 = &s2->v6.sin6_addr; |
| int i, j; |
| |
| for (i = 0; i < 4 ; i++) { |
| __u32 a1xora2; |
| |
| a1xora2 = a1->s6_addr32[i] ^ a2->s6_addr32[i]; |
| |
| if ((j = fls(ntohl(a1xora2)))) |
| return (i * 32 + 32 - j); |
| } |
| |
| return (i*32); |
| } |
| |
| /* Fills in the source address(saddr) based on the destination address(daddr) |
| * and asoc's bind address list. |
| */ |
| void sctp_v6_get_saddr(sctp_association_t *asoc, struct dst_entry *dst, |
| union sctp_addr *daddr, union sctp_addr *saddr) |
| { |
| sctp_bind_addr_t *bp; |
| rwlock_t *addr_lock; |
| struct sockaddr_storage_list *laddr; |
| struct list_head *pos; |
| sctp_scope_t scope; |
| union sctp_addr *baddr = NULL; |
| __u8 matchlen = 0; |
| __u8 bmatchlen; |
| |
| SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p " |
| "daddr:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ", |
| __FUNCTION__, asoc, dst, NIP6(&daddr->v6.sin6_addr)); |
| |
| if (!asoc) { |
| ipv6_get_saddr(dst, &daddr->v6.sin6_addr, &saddr->v6.sin6_addr); |
| SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " |
| "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", |
| NIP6(&saddr->v6.sin6_addr)); |
| return; |
| } |
| |
| scope = sctp_scope(daddr); |
| |
| bp = &asoc->base.bind_addr; |
| addr_lock = &asoc->base.addr_lock; |
| |
| /* Go through the bind address list and find the best source address |
| * that matches the scope of the destination address. |
| */ |
| sctp_read_lock(addr_lock); |
| list_for_each(pos, &bp->address_list) { |
| laddr = list_entry(pos, struct sockaddr_storage_list, list); |
| if ((laddr->a.sa.sa_family == AF_INET6) && |
| (scope <= sctp_scope(&laddr->a))) { |
| bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); |
| if (!baddr || (matchlen < bmatchlen)) { |
| baddr = &laddr->a; |
| matchlen = bmatchlen; |
| } |
| } |
| } |
| |
| if (baddr) { |
| memcpy(saddr, baddr, sizeof(union sctp_addr)); |
| SCTP_DEBUG_PRINTK("saddr: " |
| "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", |
| NIP6(&saddr->v6.sin6_addr)); |
| } else { |
| printk(KERN_ERR "%s: asoc:%p Could not find a valid source " |
| "address for the " |
| "dest:%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", |
| __FUNCTION__, asoc, NIP6(&daddr->v6.sin6_addr)); |
| } |
| |
| sctp_read_unlock(addr_lock); |
| } |
| |
| /* Make a copy of all potential local addresses. */ |
| static void sctp_v6_copy_addrlist(struct list_head *addrlist, |
| struct net_device *dev) |
| { |
| struct inet6_dev *in6_dev; |
| struct inet6_ifaddr *ifp; |
| struct sockaddr_storage_list *addr; |
| |
| read_lock(&addrconf_lock); |
| if ((in6_dev = __in6_dev_get(dev)) == NULL) { |
| read_unlock(&addrconf_lock); |
| return; |
| } |
| |
| read_lock(&in6_dev->lock); |
| for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) { |
| /* Add the address to the local list. */ |
| addr = t_new(struct sockaddr_storage_list, GFP_ATOMIC); |
| if (addr) { |
| addr->a.v6.sin6_family = AF_INET6; |
| addr->a.v6.sin6_port = 0; |
| addr->a.v6.sin6_addr = ifp->addr; |
| INIT_LIST_HEAD(&addr->list); |
| list_add_tail(&addr->list, addrlist); |
| } |
| } |
| |
| read_unlock(&in6_dev->lock); |
| read_unlock(&addrconf_lock); |
| } |
| |
| /* Initialize a sockaddr_storage from in incoming skb. */ |
| static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, |
| int is_saddr) |
| { |
| void *from; |
| __u16 *port; |
| struct sctphdr *sh; |
| |
| port = &addr->v6.sin6_port; |
| addr->v6.sin6_family = AF_INET6; |
| addr->v6.sin6_flowinfo = 0; /* FIXME */ |
| addr->v6.sin6_scope_id = 0; /* FIXME */ |
| |
| sh = (struct sctphdr *) skb->h.raw; |
| if (is_saddr) { |
| *port = ntohs(sh->source); |
| from = &skb->nh.ipv6h->saddr; |
| } else { |
| *port = ntohs(sh->dest); |
| from = &skb->nh.ipv6h->daddr; |
| } |
| ipv6_addr_copy(&addr->v6.sin6_addr, from); |
| } |
| |
| /* Initialize an sctp_addr from a socket. */ |
| static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) |
| { |
| addr->v6.sin6_family = AF_INET6; |
| addr->v6.sin6_port = inet_sk(sk)->num; |
| addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; |
| } |
| |
| /* Initialize sk->rcv_saddr from sctp_addr. */ |
| static void sctp_v6_to_sk(union sctp_addr *addr, struct sock *sk) |
| { |
| inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr; |
| } |
| |
| /* Initialize a sctp_addr from a dst_entry. */ |
| static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, |
| unsigned short port) |
| { |
| struct rt6_info *rt = (struct rt6_info *)dst; |
| addr->sa.sa_family = AF_INET6; |
| addr->v6.sin6_port = port; |
| ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr); |
| } |
| |
| /* Compare addresses exactly. Well.. almost exactly; ignore scope_id |
| * for now. FIXME: v4-mapped-v6. |
| */ |
| static int sctp_v6_cmp_addr(const union sctp_addr *addr1, |
| const union sctp_addr *addr2) |
| { |
| int match; |
| if (addr1->sa.sa_family != addr2->sa.sa_family) |
| return 0; |
| match = !ipv6_addr_cmp((struct in6_addr *)&addr1->v6.sin6_addr, |
| (struct in6_addr *)&addr2->v6.sin6_addr); |
| |
| return match; |
| } |
| |
| /* Initialize addr struct to INADDR_ANY. */ |
| static void sctp_v6_inaddr_any(union sctp_addr *addr, unsigned short port) |
| { |
| memset(addr, 0x00, sizeof(union sctp_addr)); |
| addr->v6.sin6_family = AF_INET6; |
| addr->v6.sin6_port = port; |
| } |
| |
| /* Is this a wildcard address? */ |
| static int sctp_v6_is_any(const union sctp_addr *addr) |
| { |
| int type; |
| type = ipv6_addr_type((struct in6_addr *)&addr->v6.sin6_addr); |
| return IPV6_ADDR_ANY == type; |
| } |
| |
| /* Should this be available for binding? */ |
| static int sctp_v6_available(const union sctp_addr *addr) |
| { |
| int type; |
| struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr; |
| |
| type = ipv6_addr_type(in6); |
| if (IPV6_ADDR_ANY == type) |
| return 1; |
| if (!(type & IPV6_ADDR_UNICAST)) |
| return 0; |
| |
| return ipv6_chk_addr(in6, NULL); |
| } |
| |
| |
| /* This function checks if the address is a valid address to be used for |
| * SCTP. |
| * |
| * Output: |
| * Return 0 - If the address is a non-unicast or an illegal address. |
| * Return 1 - If the address is a unicast. |
| */ |
| static int sctp_v6_addr_valid(union sctp_addr *addr) |
| { |
| int ret = ipv6_addr_type(&addr->v6.sin6_addr); |
| |
| /* FIXME: v4-mapped-v6 address support. */ |
| |
| /* Is this a non-unicast address */ |
| if (!(ret & IPV6_ADDR_UNICAST)) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* What is the scope of 'addr'? */ |
| static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) |
| { |
| int v6scope; |
| sctp_scope_t retval; |
| |
| /* The IPv6 scope is really a set of bit fields. |
| * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. |
| */ |
| |
| v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); |
| switch (v6scope) { |
| case IFA_HOST: |
| retval = SCTP_SCOPE_LOOPBACK; |
| break; |
| case IFA_LINK: |
| retval = SCTP_SCOPE_LINK; |
| break; |
| case IFA_SITE: |
| retval = SCTP_SCOPE_PRIVATE; |
| break; |
| default: |
| retval = SCTP_SCOPE_GLOBAL; |
| break; |
| }; |
| |
| return retval; |
| } |
| |
| /* Initialize a PF_INET6 socket msg_name. */ |
| static void sctp_inet6_msgname(char *msgname, int *addr_len) |
| { |
| struct sockaddr_in6 *sin6; |
| |
| sin6 = (struct sockaddr_in6 *)msgname; |
| sin6->sin6_family = AF_INET6; |
| sin6->sin6_flowinfo = 0; |
| sin6->sin6_scope_id = 0; |
| *addr_len = sizeof(struct sockaddr_in6); |
| } |
| |
| /* Initialize a PF_INET msgname from a ulpevent. */ |
| static void sctp_inet6_event_msgname(sctp_ulpevent_t *event, char *msgname, |
| int *addrlen) |
| { |
| struct sockaddr_in6 *sin6, *sin6from; |
| |
| if (msgname) { |
| union sctp_addr *addr; |
| |
| sctp_inet6_msgname(msgname, addrlen); |
| sin6 = (struct sockaddr_in6 *)msgname; |
| sin6->sin6_port = htons(event->asoc->peer.port); |
| addr = &event->asoc->peer.primary_addr; |
| |
| /* Note: If we go to a common v6 format, this code |
| * will change. |
| */ |
| |
| /* Map ipv4 address into v4-mapped-on-v6 address. */ |
| if (AF_INET == addr->sa.sa_family) { |
| /* FIXME: Easy, but there was no way to test this |
| * yet. |
| */ |
| return; |
| } |
| |
| sin6from = &event->asoc->peer.primary_addr.v6; |
| ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr); |
| } |
| } |
| |
| /* Initialize a msg_name from an inbound skb. */ |
| static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, |
| int *addr_len) |
| { |
| struct sctphdr *sh; |
| struct sockaddr_in6 *sin6; |
| |
| if (msgname) { |
| sctp_inet6_msgname(msgname, addr_len); |
| sin6 = (struct sockaddr_in6 *)msgname; |
| sh = (struct sctphdr *)skb->h.raw; |
| sin6->sin6_port = sh->source; |
| |
| /* FIXME: Map ipv4 address into v4-mapped-on-v6 address. */ |
| if (__constant_htons(ETH_P_IP) == skb->protocol) { |
| /* FIXME: Easy, but there was no way to test this |
| * yet. |
| */ |
| return; |
| } |
| |
| /* Otherwise, just copy the v6 address. */ |
| |
| ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); |
| if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { |
| struct inet6_skb_parm *opt = |
| (struct inet6_skb_parm *) skb->cb; |
| sin6->sin6_scope_id = opt->iif; |
| } |
| } |
| } |
| |
| /* Do we support this AF? */ |
| static int sctp_inet6_af_supported(sa_family_t family) |
| { |
| /* FIXME: v4-mapped-v6 addresses. The I-D is still waffling |
| * on what to do with sockaddr formats for PF_INET6 sockets. |
| * For now assume we'll support both. |
| */ |
| switch (family) { |
| case AF_INET6: |
| case AF_INET: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| /* Address matching with wildcards allowed. This extra level |
| * of indirection lets us choose whether a PF_INET6 should |
| * disallow any v4 addresses if we so choose. |
| */ |
| static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, |
| const union sctp_addr *addr2, |
| struct sctp_opt *opt) |
| { |
| struct sctp_af *af1, *af2; |
| |
| af1 = sctp_get_af_specific(addr1->sa.sa_family); |
| af2 = sctp_get_af_specific(addr2->sa.sa_family); |
| |
| if (!af1 || !af2) |
| return 0; |
| /* Today, wildcard AF_INET/AF_INET6. */ |
| if (sctp_is_any(addr1) || sctp_is_any(addr2)) |
| return 1; |
| |
| if (addr1->sa.sa_family != addr2->sa.sa_family) |
| return 0; |
| |
| return af1->cmp_addr(addr1, addr2); |
| } |
| |
| /* Verify that the provided sockaddr looks bindable. Common verification, |
| * has already been taken care of. |
| */ |
| static int sctp_inet6_bind_verify(struct sctp_opt *opt, union sctp_addr *addr) |
| { |
| struct sctp_af *af; |
| |
| /* ASSERT: address family has already been verified. */ |
| if (addr->sa.sa_family != AF_INET6) { |
| af = sctp_get_af_specific(addr->sa.sa_family); |
| } else |
| af = opt->pf->af; |
| |
| return af->available(addr); |
| } |
| |
| static struct proto_ops inet6_seqpacket_ops = { |
| .family = PF_INET6, |
| .release = inet6_release, |
| .bind = inet6_bind, |
| .connect = inet_dgram_connect, |
| .socketpair = sock_no_socketpair, |
| .accept = inet_accept, |
| .getname = inet6_getname, |
| .poll = sctp_poll, |
| .ioctl = inet6_ioctl, |
| .listen = sctp_inet_listen, |
| .shutdown = inet_shutdown, |
| .setsockopt = inet_setsockopt, |
| .getsockopt = inet_getsockopt, |
| .sendmsg = inet_sendmsg, |
| .recvmsg = inet_recvmsg, |
| .mmap = sock_no_mmap, |
| }; |
| |
| static struct inet_protosw sctpv6_protosw = { |
| .type = SOCK_SEQPACKET, |
| .protocol = IPPROTO_SCTP, |
| .prot = &sctp_prot, |
| .ops = &inet6_seqpacket_ops, |
| .capability = -1, |
| .no_check = 0, |
| .flags = SCTP_PROTOSW_FLAG |
| }; |
| |
| static struct inet6_protocol sctpv6_protocol = { |
| .handler = sctp_rcv, |
| .err_handler = sctp_v6_err, |
| }; |
| |
| static struct sctp_af sctp_ipv6_specific = { |
| .sctp_xmit = sctp_v6_xmit, |
| .setsockopt = ipv6_setsockopt, |
| .getsockopt = ipv6_getsockopt, |
| .get_dst = sctp_v6_get_dst, |
| .get_saddr = sctp_v6_get_saddr, |
| .copy_addrlist = sctp_v6_copy_addrlist, |
| .from_skb = sctp_v6_from_skb, |
| .from_sk = sctp_v6_from_sk, |
| .to_sk = sctp_v6_to_sk, |
| .dst_saddr = sctp_v6_dst_saddr, |
| .cmp_addr = sctp_v6_cmp_addr, |
| .scope = sctp_v6_scope, |
| .addr_valid = sctp_v6_addr_valid, |
| .inaddr_any = sctp_v6_inaddr_any, |
| .is_any = sctp_v6_is_any, |
| .available = sctp_v6_available, |
| .net_header_len = sizeof(struct ipv6hdr), |
| .sockaddr_len = sizeof(struct sockaddr_in6), |
| .sa_family = AF_INET6, |
| }; |
| |
| static struct sctp_pf sctp_pf_inet6_specific = { |
| .event_msgname = sctp_inet6_event_msgname, |
| .skb_msgname = sctp_inet6_skb_msgname, |
| .af_supported = sctp_inet6_af_supported, |
| .cmp_addr = sctp_inet6_cmp_addr, |
| .bind_verify = sctp_inet6_bind_verify, |
| .af = &sctp_ipv6_specific, |
| }; |
| |
| /* Initialize IPv6 support and register with inet6 stack. */ |
| int sctp_v6_init(void) |
| { |
| /* Register inet6 protocol. */ |
| if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) |
| return -EAGAIN; |
| |
| /* Add SCTPv6 to inetsw6 linked list. */ |
| inet6_register_protosw(&sctpv6_protosw); |
| |
| /* Register the SCTP specfic PF_INET6 functions. */ |
| sctp_register_pf(&sctp_pf_inet6_specific, PF_INET6); |
| |
| /* Register the SCTP specfic AF_INET6 functions. */ |
| sctp_register_af(&sctp_ipv6_specific); |
| |
| /* Register notifier for inet6 address additions/deletions. */ |
| register_inet6addr_notifier(&sctp_inetaddr_notifier); |
| |
| return 0; |
| } |
| |
| /* IPv6 specific exit support. */ |
| void sctp_v6_exit(void) |
| { |
| list_del(&sctp_ipv6_specific.list); |
| inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); |
| inet6_unregister_protosw(&sctpv6_protosw); |
| unregister_inet6addr_notifier(&sctp_inetaddr_notifier); |
| } |