patch-2.4.26 linux-2.4.26/net/sctp/ipv6.c
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- Lines: 574
- Date:
2004-04-14 06:05:41.000000000 -0700
- Orig file:
linux-2.4.25/net/sctp/ipv6.c
- Orig date:
2003-11-28 10:26:21.000000000 -0800
diff -urN linux-2.4.25/net/sctp/ipv6.c linux-2.4.26/net/sctp/ipv6.c
@@ -2,6 +2,7 @@
* Copyright (c) 2001 Nokia, Inc.
* Copyright (c) 2001 La Monte H.P. Yarroll
* Copyright (c) 2002-2003 International Business Machines, Corp.
+ * Copyright (c) 2002-2003 Intel Corp.
*
* This file is part of the SCTP kernel reference Implementation
*
@@ -15,7 +16,7 @@
*
* 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.
*
@@ -32,14 +33,15 @@
* http://www.sf.net/projects/lksctp
*
* Written or modified by:
- * Le Yanqun <yanqun.le@nokia.com>
+ * 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>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Ardelle Fan <ardelle.fan@intel.com>
*
* Based on:
- * linux/net/ipv6/tcp_ipv6.c
+ * 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.
@@ -61,6 +63,7 @@
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/random.h>
+#include <linux/seq_file.h>
#include <net/protocol.h>
#include <net/tcp.h>
@@ -79,14 +82,14 @@
/* 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])
+ 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])
/* ICMP error handler. */
void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
@@ -134,10 +137,10 @@
np = inet6_sk(sk);
icmpv6_err_convert(type, code, &err);
if (!sock_owned_by_user(sk) && np->recverr) {
- sk->err = err;
- sk->error_report(sk);
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
} else { /* Only an error on timeout */
- sk->err_soft = err;
+ sk->sk_err_soft = err;
}
out_unlock:
@@ -155,7 +158,9 @@
struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi fl;
- fl.proto = sk->protocol;
+ memset(&fl, 0, sizeof(fl));
+
+ fl.proto = sk->sk_protocol;
/* Fill in the dest address from the route entry passed with the skb
* and the source address from the transport.
@@ -168,20 +173,20 @@
if (ipv6_addr_type(fl.fl6_src) & IPV6_ADDR_LINKLOCAL)
fl.oif = transport->saddr.v6.sin6_scope_id;
else
- fl.oif = sk->bound_dev_if;
- fl.uli_u.ports.sport = (sk)->sport;
+ fl.oif = sk->sk_bound_dev_if;
+ fl.uli_u.ports.sport = sk->sport;
fl.uli_u.ports.dport = transport->ipaddr.v6.sin6_port;
if (np->opt && np->opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
- fl.nl_u.ip6_u.daddr = rt0->addr;
+ fl.fl6_dst = 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));
+ __FUNCTION__, skb, skb->len,
+ NIP6(fl.fl6_src), NIP6(fl.fl6_dst));
SCTP_INC_STATS(SctpOutSCTPPacks);
@@ -196,8 +201,13 @@
union sctp_addr *saddr)
{
struct dst_entry *dst;
- struct flowi fl = {
- .nl_u = { .ip6_u = { .daddr = &daddr->v6.sin6_addr, } } };
+ struct flowi fl;
+
+ memset(&fl, 0, sizeof(fl));
+ fl.fl6_dst = &daddr->v6.sin6_addr;
+ if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
+ fl.oif = daddr->v6.sin6_scope_id;
+
SCTP_DEBUG_PRINTK("%s: DST=%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ",
__FUNCTION__, NIP6(fl.fl6_dst));
@@ -252,9 +262,9 @@
void sctp_v6_get_saddr(struct sctp_association *asoc, struct dst_entry *dst,
union sctp_addr *daddr, union sctp_addr *saddr)
{
- sctp_bind_addr_t *bp;
+ struct sctp_bind_addr *bp;
rwlock_t *addr_lock;
- struct sockaddr_storage_list *laddr;
+ struct sctp_sockaddr_entry *laddr;
struct list_head *pos;
sctp_scope_t scope;
union sctp_addr *baddr = NULL;
@@ -283,7 +293,7 @@
*/
sctp_read_lock(addr_lock);
list_for_each(pos, &bp->address_list) {
- laddr = list_entry(pos, struct sockaddr_storage_list, list);
+ laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
if ((laddr->a.sa.sa_family == AF_INET6) &&
(scope <= sctp_scope(&laddr->a))) {
bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a);
@@ -315,7 +325,7 @@
{
struct inet6_dev *in6_dev;
struct inet6_ifaddr *ifp;
- struct sockaddr_storage_list *addr;
+ struct sctp_sockaddr_entry *addr;
read_lock(&addrconf_lock);
if ((in6_dev = __in6_dev_get(dev)) == NULL) {
@@ -326,7 +336,7 @@
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);
+ addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
if (addr) {
addr->a.v6.sin6_family = AF_INET6;
addr->a.v6.sin6_port = 0;
@@ -369,20 +379,62 @@
static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk)
{
addr->v6.sin6_family = AF_INET6;
- addr->v6.sin6_port = (sk)->num;
+ addr->v6.sin6_port = sk->num;
addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr;
}
-/* Initialize sk->rcv_saddr from sctp_addr. */
+/* Initialize sk->sk_rcv_saddr from sctp_addr. */
static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
{
- inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr;
+ if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) {
+ inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0;
+ inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0;
+ inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff);
+ inet6_sk(sk)->rcv_saddr.s6_addr32[3] =
+ addr->v4.sin_addr.s_addr;
+ } else {
+ inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr;
+ }
}
-/* Initialize sk->daddr from sctp_addr. */
+/* Initialize sk->sk_daddr from sctp_addr. */
static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
{
- inet6_sk(sk)->daddr = addr->v6.sin6_addr;
+ if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) {
+ inet6_sk(sk)->daddr.s6_addr32[0] = 0;
+ inet6_sk(sk)->daddr.s6_addr32[1] = 0;
+ inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff);
+ inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
+ } else {
+ inet6_sk(sk)->daddr = addr->v6.sin6_addr;
+ }
+}
+
+/* Initialize a sctp_addr from an address parameter. */
+static void sctp_v6_from_addr_param(union sctp_addr *addr,
+ union sctp_addr_param *param,
+ __u16 port, int iif)
+{
+ addr->v6.sin6_family = AF_INET6;
+ addr->v6.sin6_port = port;
+ addr->v6.sin6_flowinfo = 0; /* BUG */
+ ipv6_addr_copy(&addr->v6.sin6_addr, ¶m->v6.addr);
+ addr->v6.sin6_scope_id = iif;
+}
+
+/* Initialize an address parameter from a sctp_addr and return the length
+ * of the address parameter.
+ */
+static int sctp_v6_to_addr_param(const union sctp_addr *addr,
+ union sctp_addr_param *param)
+{
+ int length = sizeof(sctp_ipv6addr_param_t);
+
+ param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS;
+ param->v6.param_hdr.length = ntohs(length);
+ ipv6_addr_copy(¶m->v6.addr, &addr->v6.sin6_addr);
+
+ return length;
}
/* Initialize a sctp_addr from a dst_entry. */
@@ -396,13 +448,30 @@
}
/* Compare addresses exactly.
- * FIXME: v4-mapped-v6.
+ * v4-mapped-v6 is also in consideration.
*/
static int sctp_v6_cmp_addr(const union sctp_addr *addr1,
const union sctp_addr *addr2)
{
- if (addr1->sa.sa_family != addr2->sa.sa_family)
+ if (addr1->sa.sa_family != addr2->sa.sa_family) {
+ if (addr1->sa.sa_family == AF_INET &&
+ addr2->sa.sa_family == AF_INET6 &&
+ IPV6_ADDR_MAPPED == ipv6_addr_type(&addr2->v6.sin6_addr)) {
+ if (addr2->v6.sin6_port == addr1->v4.sin_port &&
+ addr2->v6.sin6_addr.s6_addr32[3] ==
+ addr1->v4.sin_addr.s_addr)
+ return 1;
+ }
+ if (addr2->sa.sa_family == AF_INET &&
+ addr1->sa.sa_family == AF_INET6 &&
+ IPV6_ADDR_MAPPED == ipv6_addr_type(&addr1->v6.sin6_addr)) {
+ if (addr1->v6.sin6_port == addr2->v4.sin_port &&
+ addr1->v6.sin6_addr.s6_addr32[3] ==
+ addr2->v4.sin_addr.s_addr)
+ return 1;
+ }
return 0;
+ }
if (ipv6_addr_cmp(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr))
return 0;
/* If this is a linklocal address, compare the scope_id. */
@@ -433,7 +502,7 @@
}
/* Should this be available for binding? */
-static int sctp_v6_available(const union sctp_addr *addr)
+static int sctp_v6_available(union sctp_addr *addr, struct sctp_opt *sp)
{
int type;
struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr;
@@ -441,6 +510,14 @@
type = ipv6_addr_type(in6);
if (IPV6_ADDR_ANY == type)
return 1;
+ if (type == IPV6_ADDR_MAPPED) {
+ if (sp && !sp->v4mapped)
+ return 0;
+ if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
+ return 0;
+ sctp_v6_map_v4(addr);
+ return sctp_get_af_specific(AF_INET)->available(addr, sp);
+ }
if (!(type & IPV6_ADDR_UNICAST))
return 0;
@@ -454,11 +531,22 @@
* 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)
+static int sctp_v6_addr_valid(union sctp_addr *addr, struct sctp_opt *sp)
{
int ret = ipv6_addr_type(&addr->v6.sin6_addr);
- /* FIXME: v4-mapped-v6 address support. */
+ /* Support v4-mapped-v6 address. */
+ if (ret == IPV6_ADDR_MAPPED) {
+ /* Note: This routine is used in input, so v4-mapped-v6
+ * are disallowed here when there is no sctp_opt.
+ */
+ if (!sp || !sp->v4mapped)
+ return 0;
+ if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
+ return 0;
+ sctp_v6_map_v4(addr);
+ return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp);
+ }
/* Is this a non-unicast address */
if (!(ret & IPV6_ADDR_UNICAST))
@@ -511,18 +599,18 @@
sock_init_data(NULL, newsk);
sk_set_owner(newsk, THIS_MODULE);
- newsk->type = SOCK_STREAM;
+ newsk->sk_type = SOCK_STREAM;
- newsk->prot = sk->prot;
- newsk->no_check = sk->no_check;
- newsk->reuse = sk->reuse;
-
- newsk->destruct = inet_sock_destruct;
- newsk->zapped = 0;
- newsk->family = PF_INET6;
- newsk->protocol = IPPROTO_SCTP;
- newsk->backlog_rcv = sk->prot->backlog_rcv;
- newsk->shutdown = sk->shutdown;
+ newsk->sk_prot = sk->sk_prot;
+ newsk->sk_no_check = sk->sk_no_check;
+ newsk->sk_reuse = sk->sk_reuse;
+
+ newsk->sk_destruct = inet_sock_destruct;
+ newsk->sk_zapped = 0;
+ newsk->sk_family = PF_INET6;
+ newsk->sk_protocol = IPPROTO_SCTP;
+ newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
+ newsk->sk_shutdown = sk->sk_shutdown;
newinet = inet_sk(newsk);
newnp = inet6_sk(newsk);
@@ -533,17 +621,31 @@
* and getpeername().
*/
newsk->sport = sk->sport;
- newnp->saddr = np->saddr;
+ newsk->saddr = sk->saddr;
newnp->rcv_saddr = np->rcv_saddr;
newsk->dport = htons(asoc->peer.port);
- newnp->daddr = asoc->peer.primary_addr.v6.sin6_addr;
+ sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk);
+
+ /* Init the ipv4 part of the socket since we can have sockets
+ * using v6 API for ipv4.
+ */
+ newinet->ttl = sysctl_ip_default_ttl;
+ newinet->mc_loop = 1;
+ newinet->mc_ttl = 1;
+ newinet->mc_index = 0;
+ newinet->mc_list = NULL;
+
+ if (ipv4_config.no_pmtu_disc)
+ newinet->pmtudisc = IP_PMTUDISC_DONT;
+ else
+ newinet->pmtudisc = IP_PMTUDISC_WANT;
#ifdef INET_REFCNT_DEBUG
atomic_inc(&inet6_sock_nr);
atomic_inc(&inet_sock_nr);
#endif
- if (0 != newsk->prot->init(newsk)) {
+ if (newsk->sk_prot->init(newsk)) {
inet_sock_release(newsk);
newsk = NULL;
}
@@ -552,6 +654,13 @@
return newsk;
}
+/* Map v4 address to mapped v6 address */
+static void sctp_v6_addr_v4map(struct sctp_opt *sp, union sctp_addr *addr)
+{
+ if (sp->v4mapped && AF_INET == addr->sa.sa_family)
+ sctp_v4_map_v6(addr);
+}
+
/* Where did this skb come from? */
static int sctp_v6_skb_iif(const struct sk_buff *skb)
{
@@ -559,6 +668,19 @@
return opt->iif;
}
+/* Was this packet marked by Explicit Congestion Notification? */
+static int sctp_v6_is_ce(const struct sk_buff *skb)
+{
+ return *((__u32 *)(skb->nh.ipv6h)) & htonl(1<<20);
+}
+
+/* Dump the v6 addr to the seq file. */
+static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
+{
+ seq_printf(seq, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ",
+ NIP6(&addr->v6.sin6_addr));
+}
+
/* Initialize a PF_INET6 socket msg_name. */
static void sctp_inet6_msgname(char *msgname, int *addr_len)
{
@@ -579,25 +701,28 @@
if (msgname) {
union sctp_addr *addr;
+ struct sctp_association *asoc;
+ asoc = event->sndrcvinfo.sinfo_assoc_id;
sctp_inet6_msgname(msgname, addrlen);
sin6 = (struct sockaddr_in6 *)msgname;
- sin6->sin6_port = htons(event->event_asoc->peer.port);
- addr = &event->event_asoc->peer.primary_addr;
+ sin6->sin6_port = htons(asoc->peer.port);
+ addr = &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.
- */
+ if (sctp_sk(asoc->base.sk)->v4mapped &&
+ AF_INET == addr->sa.sa_family) {
+ sctp_v4_map_v6((union sctp_addr *)sin6);
+ sin6->sin6_addr.s6_addr32[3] =
+ addr->v4.sin_addr.s_addr;
return;
}
- sin6from = &event->event_asoc->peer.primary_addr.v6;
+ sin6from = &asoc->peer.primary_addr.v6;
ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr);
if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6->sin6_scope_id = sin6from->sin6_scope_id;
@@ -617,16 +742,15 @@
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: The latest I-D added options for two
- * behaviors.
- */
+ /* Map ipv4 address into v4-mapped-on-v6 address. */
+ if (sctp_sk(skb->sk)->v4mapped &&
+ skb->nh.iph->version == 4) {
+ sctp_v4_map_v6((union sctp_addr *)sin6);
+ sin6->sin6_addr.s6_addr32[3] = skb->nh.iph->saddr;
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 sctp_ulpevent *ev = sctp_skb2event(skb);
@@ -636,16 +760,15 @@
}
/* Do we support this AF? */
-static int sctp_inet6_af_supported(sa_family_t family)
+static int sctp_inet6_af_supported(sa_family_t family, struct sctp_opt *sp)
{
- /* 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;
+ /* v4-mapped-v6 addresses */
+ case AF_INET:
+ if (!__ipv6_only_sock(sctp_opt2sk(sp)) && sp->v4mapped)
+ return 1;
default:
return 0;
}
@@ -689,7 +812,7 @@
else {
struct sock *sk;
int type = ipv6_addr_type(&addr->v6.sin6_addr);
- sk = container_of(opt, struct sock, tp_pinfo.af_sctp);
+ sk = sctp_opt2sk(opt);
if (type & IPV6_ADDR_LINKLOCAL) {
/* Note: Behavior similar to af_inet6.c:
* 1) Overrides previous bound_dev_if
@@ -697,13 +820,13 @@
*/
if (addr->v6.sin6_scope_id)
- sk->bound_dev_if = addr->v6.sin6_scope_id;
- if (!sk->bound_dev_if)
+ sk->sk_bound_dev_if = addr->v6.sin6_scope_id;
+ if (!sk->sk_bound_dev_if)
return 0;
}
af = opt->pf->af;
}
- return af->available(addr);
+ return af->available(addr, opt);
}
/* Verify that the provided sockaddr looks bindable. Common verification,
@@ -719,7 +842,7 @@
else {
struct sock *sk;
int type = ipv6_addr_type(&addr->v6.sin6_addr);
- sk = container_of(opt, struct sock, tp_pinfo.af_sctp);
+ sk = sctp_opt2sk(opt);
if (type & IPV6_ADDR_LINKLOCAL) {
/* Note: Behavior similar to af_inet6.c:
* 1) Overrides previous bound_dev_if
@@ -727,8 +850,8 @@
*/
if (addr->v6.sin6_scope_id)
- sk->bound_dev_if = addr->v6.sin6_scope_id;
- if (!sk->bound_dev_if)
+ sk->sk_bound_dev_if = addr->v6.sin6_scope_id;
+ if (!sk->sk_bound_dev_if)
return 0;
}
af = opt->pf->af;
@@ -810,6 +933,8 @@
.from_sk = sctp_v6_from_sk,
.to_sk_saddr = sctp_v6_to_sk_saddr,
.to_sk_daddr = sctp_v6_to_sk_daddr,
+ .from_addr_param = sctp_v6_from_addr_param,
+ .to_addr_param = sctp_v6_to_addr_param,
.dst_saddr = sctp_v6_dst_saddr,
.cmp_addr = sctp_v6_cmp_addr,
.scope = sctp_v6_scope,
@@ -818,6 +943,8 @@
.is_any = sctp_v6_is_any,
.available = sctp_v6_available,
.skb_iif = sctp_v6_skb_iif,
+ .is_ce = sctp_v6_is_ce,
+ .seq_dump_addr = sctp_v6_seq_dump_addr,
.net_header_len = sizeof(struct ipv6hdr),
.sockaddr_len = sizeof(struct sockaddr_in6),
.sa_family = AF_INET6,
@@ -832,6 +959,7 @@
.send_verify = sctp_inet6_send_verify,
.supported_addrs = sctp_inet6_supported_addrs,
.create_accept_sk = sctp_v6_create_accept_sk,
+ .addr_v4map = sctp_v6_addr_v4map,
.af = &sctp_ipv6_specific,
};
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)