/* SCTP kernel reference Implementation
|
/* SCTP kernel reference Implementation
|
* (C) Copyright IBM Corp. 2001, 2003
|
* (C) Copyright IBM Corp. 2001, 2003
|
* Copyright (c) Cisco 1999,2000
|
* Copyright (c) Cisco 1999,2000
|
* Copyright (c) Motorola 1999,2000,2001
|
* Copyright (c) Motorola 1999,2000,2001
|
* Copyright (c) La Monte H.P. Yarroll 2001
|
* Copyright (c) La Monte H.P. Yarroll 2001
|
*
|
*
|
* This file is part of the SCTP kernel reference implementation.
|
* This file is part of the SCTP kernel reference implementation.
|
*
|
*
|
* A collection class to handle the storage of transport addresses.
|
* A collection class to handle the storage of transport addresses.
|
*
|
*
|
* The SCTP reference implementation is free software;
|
* The SCTP reference implementation is free software;
|
* you can redistribute it and/or modify it under the terms of
|
* you can redistribute it and/or modify it under the terms of
|
* the GNU General Public License as published by
|
* the GNU General Public License as published by
|
* the Free Software Foundation; either version 2, or (at your option)
|
* the Free Software Foundation; either version 2, or (at your option)
|
* any later version.
|
* any later version.
|
*
|
*
|
* The SCTP reference implementation is distributed in the hope that it
|
* The SCTP reference implementation is distributed in the hope that it
|
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
|
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
|
* ************************
|
* ************************
|
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
* See the GNU General Public License for more details.
|
* See the GNU General Public License for more details.
|
*
|
*
|
* You should have received a copy of the GNU General Public License
|
* You should have received a copy of the GNU General Public License
|
* along with GNU CC; see the file COPYING. If not, write to
|
* along with GNU CC; see the file COPYING. If not, write to
|
* the Free Software Foundation, 59 Temple Place - Suite 330,
|
* the Free Software Foundation, 59 Temple Place - Suite 330,
|
* Boston, MA 02111-1307, USA.
|
* Boston, MA 02111-1307, USA.
|
*
|
*
|
* Please send any bug reports or fixes you make to the
|
* Please send any bug reports or fixes you make to the
|
* email address(es):
|
* email address(es):
|
* lksctp developers <lksctp-developers@lists.sourceforge.net>
|
* lksctp developers <lksctp-developers@lists.sourceforge.net>
|
*
|
*
|
* Or submit a bug report through the following website:
|
* Or submit a bug report through the following website:
|
* http://www.sf.net/projects/lksctp
|
* http://www.sf.net/projects/lksctp
|
*
|
*
|
* Written or modified by:
|
* Written or modified by:
|
* La Monte H.P. Yarroll <piggy@acm.org>
|
* La Monte H.P. Yarroll <piggy@acm.org>
|
* Karl Knutson <karl@athena.chicago.il.us>
|
* Karl Knutson <karl@athena.chicago.il.us>
|
* Jon Grimm <jgrimm@us.ibm.com>
|
* Jon Grimm <jgrimm@us.ibm.com>
|
* Daisy Chang <daisyc@us.ibm.com>
|
* Daisy Chang <daisyc@us.ibm.com>
|
*
|
*
|
* Any bugs reported given to us we will try to fix... any fixes shared will
|
* Any bugs reported given to us we will try to fix... any fixes shared will
|
* be incorporated into the next SCTP release.
|
* be incorporated into the next SCTP release.
|
*/
|
*/
|
|
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/in.h>
|
#include <linux/in.h>
|
#include <net/sock.h>
|
#include <net/sock.h>
|
#include <net/ipv6.h>
|
#include <net/ipv6.h>
|
#include <net/if_inet6.h>
|
#include <net/if_inet6.h>
|
#include <net/sctp/sctp.h>
|
#include <net/sctp/sctp.h>
|
#include <net/sctp/sm.h>
|
#include <net/sctp/sm.h>
|
|
|
/* Forward declarations for internal helpers. */
|
/* Forward declarations for internal helpers. */
|
static int sctp_copy_one_addr(struct sctp_bind_addr *, union sctp_addr *,
|
static int sctp_copy_one_addr(struct sctp_bind_addr *, union sctp_addr *,
|
sctp_scope_t scope, int gfp, int flags);
|
sctp_scope_t scope, int gfp, int flags);
|
static void sctp_bind_addr_clean(struct sctp_bind_addr *);
|
static void sctp_bind_addr_clean(struct sctp_bind_addr *);
|
|
|
/* First Level Abstractions. */
|
/* First Level Abstractions. */
|
|
|
/* Copy 'src' to 'dest' taking 'scope' into account. Omit addresses
|
/* Copy 'src' to 'dest' taking 'scope' into account. Omit addresses
|
* in 'src' which have a broader scope than 'scope'.
|
* in 'src' which have a broader scope than 'scope'.
|
*/
|
*/
|
int sctp_bind_addr_copy(struct sctp_bind_addr *dest,
|
int sctp_bind_addr_copy(struct sctp_bind_addr *dest,
|
const struct sctp_bind_addr *src,
|
const struct sctp_bind_addr *src,
|
sctp_scope_t scope, int gfp, int flags)
|
sctp_scope_t scope, int gfp, int flags)
|
{
|
{
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
struct list_head *pos;
|
struct list_head *pos;
|
int error = 0;
|
int error = 0;
|
|
|
/* All addresses share the same port. */
|
/* All addresses share the same port. */
|
dest->port = src->port;
|
dest->port = src->port;
|
|
|
/* Extract the addresses which are relevant for this scope. */
|
/* Extract the addresses which are relevant for this scope. */
|
list_for_each(pos, &src->address_list) {
|
list_for_each(pos, &src->address_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
error = sctp_copy_one_addr(dest, &addr->a, scope,
|
error = sctp_copy_one_addr(dest, &addr->a, scope,
|
gfp, flags);
|
gfp, flags);
|
if (error < 0)
|
if (error < 0)
|
goto out;
|
goto out;
|
}
|
}
|
|
|
/* If there are no addresses matching the scope and
|
/* If there are no addresses matching the scope and
|
* this is global scope, try to get a link scope address, with
|
* this is global scope, try to get a link scope address, with
|
* the assumption that we must be sitting behind a NAT.
|
* the assumption that we must be sitting behind a NAT.
|
*/
|
*/
|
if (list_empty(&dest->address_list) && (SCTP_SCOPE_GLOBAL == scope)) {
|
if (list_empty(&dest->address_list) && (SCTP_SCOPE_GLOBAL == scope)) {
|
list_for_each(pos, &src->address_list) {
|
list_for_each(pos, &src->address_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry,
|
addr = list_entry(pos, struct sctp_sockaddr_entry,
|
list);
|
list);
|
error = sctp_copy_one_addr(dest, &addr->a,
|
error = sctp_copy_one_addr(dest, &addr->a,
|
SCTP_SCOPE_LINK, gfp,
|
SCTP_SCOPE_LINK, gfp,
|
flags);
|
flags);
|
if (error < 0)
|
if (error < 0)
|
goto out;
|
goto out;
|
}
|
}
|
}
|
}
|
|
|
out:
|
out:
|
if (error)
|
if (error)
|
sctp_bind_addr_clean(dest);
|
sctp_bind_addr_clean(dest);
|
|
|
return error;
|
return error;
|
}
|
}
|
|
|
/* Create a new SCTP_bind_addr from nothing. */
|
/* Create a new SCTP_bind_addr from nothing. */
|
struct sctp_bind_addr *sctp_bind_addr_new(int gfp)
|
struct sctp_bind_addr *sctp_bind_addr_new(int gfp)
|
{
|
{
|
struct sctp_bind_addr *retval;
|
struct sctp_bind_addr *retval;
|
|
|
retval = t_new(struct sctp_bind_addr, gfp);
|
retval = t_new(struct sctp_bind_addr, gfp);
|
if (!retval)
|
if (!retval)
|
goto nomem;
|
goto nomem;
|
|
|
sctp_bind_addr_init(retval, 0);
|
sctp_bind_addr_init(retval, 0);
|
retval->malloced = 1;
|
retval->malloced = 1;
|
SCTP_DBG_OBJCNT_INC(bind_addr);
|
SCTP_DBG_OBJCNT_INC(bind_addr);
|
|
|
nomem:
|
nomem:
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* Initialize the SCTP_bind_addr structure for either an endpoint or
|
/* Initialize the SCTP_bind_addr structure for either an endpoint or
|
* an association.
|
* an association.
|
*/
|
*/
|
void sctp_bind_addr_init(struct sctp_bind_addr *bp, __u16 port)
|
void sctp_bind_addr_init(struct sctp_bind_addr *bp, __u16 port)
|
{
|
{
|
bp->malloced = 0;
|
bp->malloced = 0;
|
|
|
INIT_LIST_HEAD(&bp->address_list);
|
INIT_LIST_HEAD(&bp->address_list);
|
bp->port = port;
|
bp->port = port;
|
}
|
}
|
|
|
/* Dispose of the address list. */
|
/* Dispose of the address list. */
|
static void sctp_bind_addr_clean(struct sctp_bind_addr *bp)
|
static void sctp_bind_addr_clean(struct sctp_bind_addr *bp)
|
{
|
{
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
struct list_head *pos, *temp;
|
struct list_head *pos, *temp;
|
|
|
/* Empty the bind address list. */
|
/* Empty the bind address list. */
|
list_for_each_safe(pos, temp, &bp->address_list) {
|
list_for_each_safe(pos, temp, &bp->address_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
list_del(pos);
|
list_del(pos);
|
kfree(addr);
|
kfree(addr);
|
SCTP_DBG_OBJCNT_DEC(addr);
|
SCTP_DBG_OBJCNT_DEC(addr);
|
}
|
}
|
}
|
}
|
|
|
/* Dispose of an SCTP_bind_addr structure */
|
/* Dispose of an SCTP_bind_addr structure */
|
void sctp_bind_addr_free(struct sctp_bind_addr *bp)
|
void sctp_bind_addr_free(struct sctp_bind_addr *bp)
|
{
|
{
|
/* Empty the bind address list. */
|
/* Empty the bind address list. */
|
sctp_bind_addr_clean(bp);
|
sctp_bind_addr_clean(bp);
|
|
|
if (bp->malloced) {
|
if (bp->malloced) {
|
kfree(bp);
|
kfree(bp);
|
SCTP_DBG_OBJCNT_DEC(bind_addr);
|
SCTP_DBG_OBJCNT_DEC(bind_addr);
|
}
|
}
|
}
|
}
|
|
|
/* Add an address to the bind address list in the SCTP_bind_addr structure. */
|
/* Add an address to the bind address list in the SCTP_bind_addr structure. */
|
int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new,
|
int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new,
|
int gfp)
|
int gfp)
|
{
|
{
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
|
|
/* Add the address to the bind address list. */
|
/* Add the address to the bind address list. */
|
addr = t_new(struct sctp_sockaddr_entry, gfp);
|
addr = t_new(struct sctp_sockaddr_entry, gfp);
|
if (!addr)
|
if (!addr)
|
return -ENOMEM;
|
return -ENOMEM;
|
|
|
memcpy(&addr->a, new, sizeof(*new));
|
memcpy(&addr->a, new, sizeof(*new));
|
|
|
/* Fix up the port if it has not yet been set.
|
/* Fix up the port if it has not yet been set.
|
* Both v4 and v6 have the port at the same offset.
|
* Both v4 and v6 have the port at the same offset.
|
*/
|
*/
|
if (!addr->a.v4.sin_port)
|
if (!addr->a.v4.sin_port)
|
addr->a.v4.sin_port = bp->port;
|
addr->a.v4.sin_port = bp->port;
|
|
|
INIT_LIST_HEAD(&addr->list);
|
INIT_LIST_HEAD(&addr->list);
|
list_add_tail(&addr->list, &bp->address_list);
|
list_add_tail(&addr->list, &bp->address_list);
|
SCTP_DBG_OBJCNT_INC(addr);
|
SCTP_DBG_OBJCNT_INC(addr);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Delete an address from the bind address list in the SCTP_bind_addr
|
/* Delete an address from the bind address list in the SCTP_bind_addr
|
* structure.
|
* structure.
|
*/
|
*/
|
int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr)
|
int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr)
|
{
|
{
|
struct list_head *pos, *temp;
|
struct list_head *pos, *temp;
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
|
|
list_for_each_safe(pos, temp, &bp->address_list) {
|
list_for_each_safe(pos, temp, &bp->address_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
if (sctp_cmp_addr_exact(&addr->a, del_addr)) {
|
if (sctp_cmp_addr_exact(&addr->a, del_addr)) {
|
/* Found the exact match. */
|
/* Found the exact match. */
|
list_del(pos);
|
list_del(pos);
|
kfree(addr);
|
kfree(addr);
|
SCTP_DBG_OBJCNT_DEC(addr);
|
SCTP_DBG_OBJCNT_DEC(addr);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
|
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
|
|
/* Create a network byte-order representation of all the addresses
|
/* Create a network byte-order representation of all the addresses
|
* formated as SCTP parameters.
|
* formated as SCTP parameters.
|
*
|
*
|
* The second argument is the return value for the length.
|
* The second argument is the return value for the length.
|
*/
|
*/
|
union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp,
|
union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp,
|
int *addrs_len, int gfp)
|
int *addrs_len, int gfp)
|
{
|
{
|
union sctp_params addrparms;
|
union sctp_params addrparms;
|
union sctp_params retval;
|
union sctp_params retval;
|
int addrparms_len;
|
int addrparms_len;
|
union sctp_addr_param rawaddr;
|
union sctp_addr_param rawaddr;
|
int len;
|
int len;
|
struct sctp_sockaddr_entry *addr;
|
struct sctp_sockaddr_entry *addr;
|
struct list_head *pos;
|
struct list_head *pos;
|
struct sctp_af *af;
|
struct sctp_af *af;
|
|
|
addrparms_len = 0;
|
addrparms_len = 0;
|
len = 0;
|
len = 0;
|
|
|
/* Allocate enough memory at once. */
|
/* Allocate enough memory at once. */
|
list_for_each(pos, &bp->address_list) {
|
list_for_each(pos, &bp->address_list) {
|
len += sizeof(union sctp_addr_param);
|
len += sizeof(union sctp_addr_param);
|
}
|
}
|
|
|
/* Don't even bother embedding an address if there
|
/* Don't even bother embedding an address if there
|
* is only one.
|
* is only one.
|
*/
|
*/
|
if (len == sizeof(union sctp_addr_param)) {
|
if (len == sizeof(union sctp_addr_param)) {
|
retval.v = NULL;
|
retval.v = NULL;
|
goto end_raw;
|
goto end_raw;
|
}
|
}
|
|
|
retval.v = kmalloc(len, gfp);
|
retval.v = kmalloc(len, gfp);
|
if (!retval.v)
|
if (!retval.v)
|
goto end_raw;
|
goto end_raw;
|
|
|
addrparms = retval;
|
addrparms = retval;
|
|
|
list_for_each(pos, &bp->address_list) {
|
list_for_each(pos, &bp->address_list) {
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
addr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
af = sctp_get_af_specific(addr->a.v4.sin_family);
|
af = sctp_get_af_specific(addr->a.v4.sin_family);
|
len = af->to_addr_param(&addr->a, &rawaddr);
|
len = af->to_addr_param(&addr->a, &rawaddr);
|
memcpy(addrparms.v, &rawaddr, len);
|
memcpy(addrparms.v, &rawaddr, len);
|
addrparms.v += len;
|
addrparms.v += len;
|
addrparms_len += len;
|
addrparms_len += len;
|
}
|
}
|
|
|
end_raw:
|
end_raw:
|
*addrs_len = addrparms_len;
|
*addrs_len = addrparms_len;
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/*
|
/*
|
* Create an address list out of the raw address list format (IPv4 and IPv6
|
* Create an address list out of the raw address list format (IPv4 and IPv6
|
* address parameters).
|
* address parameters).
|
*/
|
*/
|
int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw_addr_list,
|
int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw_addr_list,
|
int addrs_len, __u16 port, int gfp)
|
int addrs_len, __u16 port, int gfp)
|
{
|
{
|
union sctp_addr_param *rawaddr;
|
union sctp_addr_param *rawaddr;
|
struct sctp_paramhdr *param;
|
struct sctp_paramhdr *param;
|
union sctp_addr addr;
|
union sctp_addr addr;
|
int retval = 0;
|
int retval = 0;
|
int len;
|
int len;
|
struct sctp_af *af;
|
struct sctp_af *af;
|
|
|
/* Convert the raw address to standard address format */
|
/* Convert the raw address to standard address format */
|
while (addrs_len) {
|
while (addrs_len) {
|
param = (struct sctp_paramhdr *)raw_addr_list;
|
param = (struct sctp_paramhdr *)raw_addr_list;
|
rawaddr = (union sctp_addr_param *)raw_addr_list;
|
rawaddr = (union sctp_addr_param *)raw_addr_list;
|
|
|
af = sctp_get_af_specific(param_type2af(param->type));
|
af = sctp_get_af_specific(param_type2af(param->type));
|
if (unlikely(!af)) {
|
if (unlikely(!af)) {
|
retval = -EINVAL;
|
retval = -EINVAL;
|
sctp_bind_addr_clean(bp);
|
sctp_bind_addr_clean(bp);
|
break;
|
break;
|
}
|
}
|
|
|
af->from_addr_param(&addr, rawaddr, port, 0);
|
af->from_addr_param(&addr, rawaddr, port, 0);
|
retval = sctp_add_bind_addr(bp, &addr, gfp);
|
retval = sctp_add_bind_addr(bp, &addr, gfp);
|
if (retval) {
|
if (retval) {
|
/* Can't finish building the list, clean up. */
|
/* Can't finish building the list, clean up. */
|
sctp_bind_addr_clean(bp);
|
sctp_bind_addr_clean(bp);
|
break;;
|
break;;
|
}
|
}
|
|
|
len = ntohs(param->length);
|
len = ntohs(param->length);
|
addrs_len -= len;
|
addrs_len -= len;
|
raw_addr_list += len;
|
raw_addr_list += len;
|
}
|
}
|
|
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/********************************************************************
|
/********************************************************************
|
* 2nd Level Abstractions
|
* 2nd Level Abstractions
|
********************************************************************/
|
********************************************************************/
|
|
|
/* Does this contain a specified address? Allow wildcarding. */
|
/* Does this contain a specified address? Allow wildcarding. */
|
int sctp_bind_addr_match(struct sctp_bind_addr *bp,
|
int sctp_bind_addr_match(struct sctp_bind_addr *bp,
|
const union sctp_addr *addr,
|
const union sctp_addr *addr,
|
struct sctp_opt *opt)
|
struct sctp_opt *opt)
|
{
|
{
|
struct sctp_sockaddr_entry *laddr;
|
struct sctp_sockaddr_entry *laddr;
|
struct list_head *pos;
|
struct list_head *pos;
|
|
|
list_for_each(pos, &bp->address_list) {
|
list_for_each(pos, &bp->address_list) {
|
laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
if (opt->pf->cmp_addr(&laddr->a, addr, opt))
|
if (opt->pf->cmp_addr(&laddr->a, addr, opt))
|
return 1;
|
return 1;
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Find the first address in the bind address list that is not present in
|
/* Find the first address in the bind address list that is not present in
|
* the addrs packed array.
|
* the addrs packed array.
|
*/
|
*/
|
union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp,
|
union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp,
|
const union sctp_addr *addrs,
|
const union sctp_addr *addrs,
|
int addrcnt,
|
int addrcnt,
|
struct sctp_opt *opt)
|
struct sctp_opt *opt)
|
{
|
{
|
struct sctp_sockaddr_entry *laddr;
|
struct sctp_sockaddr_entry *laddr;
|
union sctp_addr *addr;
|
union sctp_addr *addr;
|
void *addr_buf;
|
void *addr_buf;
|
struct sctp_af *af;
|
struct sctp_af *af;
|
struct list_head *pos;
|
struct list_head *pos;
|
int i;
|
int i;
|
|
|
list_for_each(pos, &bp->address_list) {
|
list_for_each(pos, &bp->address_list) {
|
laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
|
|
|
addr_buf = (union sctp_addr *)addrs;
|
addr_buf = (union sctp_addr *)addrs;
|
for (i = 0; i < addrcnt; i++) {
|
for (i = 0; i < addrcnt; i++) {
|
addr = (union sctp_addr *)addr_buf;
|
addr = (union sctp_addr *)addr_buf;
|
af = sctp_get_af_specific(addr->v4.sin_family);
|
af = sctp_get_af_specific(addr->v4.sin_family);
|
if (!af)
|
if (!af)
|
return NULL;
|
return NULL;
|
|
|
if (opt->pf->cmp_addr(&laddr->a, addr, opt))
|
if (opt->pf->cmp_addr(&laddr->a, addr, opt))
|
break;
|
break;
|
|
|
addr_buf += af->sockaddr_len;
|
addr_buf += af->sockaddr_len;
|
}
|
}
|
if (i == addrcnt)
|
if (i == addrcnt)
|
return &laddr->a;
|
return &laddr->a;
|
}
|
}
|
|
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/* Copy out addresses from the global local address list. */
|
/* Copy out addresses from the global local address list. */
|
static int sctp_copy_one_addr(struct sctp_bind_addr *dest,
|
static int sctp_copy_one_addr(struct sctp_bind_addr *dest,
|
union sctp_addr *addr,
|
union sctp_addr *addr,
|
sctp_scope_t scope, int gfp, int flags)
|
sctp_scope_t scope, int gfp, int flags)
|
{
|
{
|
int error = 0;
|
int error = 0;
|
|
|
if (sctp_is_any(addr)) {
|
if (sctp_is_any(addr)) {
|
error = sctp_copy_local_addr_list(dest, scope, gfp, flags);
|
error = sctp_copy_local_addr_list(dest, scope, gfp, flags);
|
} else if (sctp_in_scope(addr, scope)) {
|
} else if (sctp_in_scope(addr, scope)) {
|
/* Now that the address is in scope, check to see if
|
/* Now that the address is in scope, check to see if
|
* the address type is supported by local sock as
|
* the address type is supported by local sock as
|
* well as the remote peer.
|
* well as the remote peer.
|
*/
|
*/
|
if ((((AF_INET == addr->sa.sa_family) &&
|
if ((((AF_INET == addr->sa.sa_family) &&
|
(flags & SCTP_ADDR4_PEERSUPP))) ||
|
(flags & SCTP_ADDR4_PEERSUPP))) ||
|
(((AF_INET6 == addr->sa.sa_family) &&
|
(((AF_INET6 == addr->sa.sa_family) &&
|
(flags & SCTP_ADDR6_ALLOWED) &&
|
(flags & SCTP_ADDR6_ALLOWED) &&
|
(flags & SCTP_ADDR6_PEERSUPP))))
|
(flags & SCTP_ADDR6_PEERSUPP))))
|
error = sctp_add_bind_addr(dest, addr, gfp);
|
error = sctp_add_bind_addr(dest, addr, gfp);
|
}
|
}
|
|
|
return error;
|
return error;
|
}
|
}
|
|
|
/* Is this a wildcard address? */
|
/* Is this a wildcard address? */
|
int sctp_is_any(const union sctp_addr *addr)
|
int sctp_is_any(const union sctp_addr *addr)
|
{
|
{
|
struct sctp_af *af = sctp_get_af_specific(addr->sa.sa_family);
|
struct sctp_af *af = sctp_get_af_specific(addr->sa.sa_family);
|
if (!af)
|
if (!af)
|
return 0;
|
return 0;
|
return af->is_any(addr);
|
return af->is_any(addr);
|
}
|
}
|
|
|
/* Is 'addr' valid for 'scope'? */
|
/* Is 'addr' valid for 'scope'? */
|
int sctp_in_scope(const union sctp_addr *addr, sctp_scope_t scope)
|
int sctp_in_scope(const union sctp_addr *addr, sctp_scope_t scope)
|
{
|
{
|
sctp_scope_t addr_scope = sctp_scope(addr);
|
sctp_scope_t addr_scope = sctp_scope(addr);
|
|
|
/* The unusable SCTP addresses will not be considered with
|
/* The unusable SCTP addresses will not be considered with
|
* any defined scopes.
|
* any defined scopes.
|
*/
|
*/
|
if (SCTP_SCOPE_UNUSABLE == addr_scope)
|
if (SCTP_SCOPE_UNUSABLE == addr_scope)
|
return 0;
|
return 0;
|
/*
|
/*
|
* For INIT and INIT-ACK address list, let L be the level of
|
* For INIT and INIT-ACK address list, let L be the level of
|
* of requested destination address, sender and receiver
|
* of requested destination address, sender and receiver
|
* SHOULD include all of its addresses with level greater
|
* SHOULD include all of its addresses with level greater
|
* than or equal to L.
|
* than or equal to L.
|
*/
|
*/
|
if (addr_scope <= scope)
|
if (addr_scope <= scope)
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/********************************************************************
|
/********************************************************************
|
* 3rd Level Abstractions
|
* 3rd Level Abstractions
|
********************************************************************/
|
********************************************************************/
|
|
|
/* What is the scope of 'addr'? */
|
/* What is the scope of 'addr'? */
|
sctp_scope_t sctp_scope(const union sctp_addr *addr)
|
sctp_scope_t sctp_scope(const union sctp_addr *addr)
|
{
|
{
|
struct sctp_af *af;
|
struct sctp_af *af;
|
|
|
af = sctp_get_af_specific(addr->sa.sa_family);
|
af = sctp_get_af_specific(addr->sa.sa_family);
|
if (!af)
|
if (!af)
|
return SCTP_SCOPE_UNUSABLE;
|
return SCTP_SCOPE_UNUSABLE;
|
|
|
return af->scope((union sctp_addr *)addr);
|
return af->scope((union sctp_addr *)addr);
|
}
|
}
|
|
|
