/*
* Connection tracking protocol helper module for SCTP.
- *
- * SCTP is defined in RFC 2960. References to various sections in this code
+ *
+ * SCTP is defined in RFC 2960. References to various sections in this code
* are to this RFC.
- *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * 17 Oct 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
- * - enable working with L3 protocol independent connection tracking.
- *
- * Derived from net/ipv4/ip_conntrack_sctp.c
- */
-
-/*
- * Added support for proc manipulation of timeouts.
*/
#include <linux/types.h>
-#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
-#if 0
-#define DEBUGP(format, ...) printk(format, ## __VA_ARGS__)
-#else
-#define DEBUGP(format, args...)
-#endif
-
/* Protects conntrack->proto.sctp */
static DEFINE_RWLOCK(sctp_lock);
/* FIXME: Examine ipfilter's timeouts and conntrack transitions more
- closely. They're more complex. --RR
+ closely. They're more complex. --RR
And so for me for SCTP :D -Kiran */
#define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
#define sIV SCTP_CONNTRACK_MAX
-/*
+/*
These are the descriptions of the states:
-NOTE: These state names are tantalizingly similar to the states of an
+NOTE: These state names are tantalizingly similar to the states of an
SCTP endpoint. But the interpretation of the states is a little different,
-considering that these are the states of the connection and not of an end
+considering that these are the states of the connection and not of an end
point. Please note the subtleties. -Kiran
NONE - Nothing so far.
-COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
- an INIT_ACK chunk in the reply direction.
+COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
+ an INIT_ACK chunk in the reply direction.
COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
- to that of the SHUTDOWN chunk.
-CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
- the SHUTDOWN chunk. Connection is closed.
+ to that of the SHUTDOWN chunk.
+CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
+ the SHUTDOWN chunk. Connection is closed.
*/
/* TODO
- - I have assumed that the first INIT is in the original direction.
+ - I have assumed that the first INIT is in the original direction.
This messes things when an INIT comes in the reply direction in CLOSED
state.
- - Check the error type in the reply dir before transitioning from
+ - Check the error type in the reply dir before transitioning from
cookie echoed to closed.
- Sec 5.2.4 of RFC 2960
- Multi Homing support.
{
sctp_sctphdr_t _hdr, *hp;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
/* Actually only need first 8 bytes. */
hp = skb_header_pointer(skb, dataoff, 8, &_hdr);
if (hp == NULL)
static int sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig)
{
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
tuple->src.u.sctp.port = orig->dst.u.sctp.port;
tuple->dst.u.sctp.port = orig->src.u.sctp.port;
return 1;
static int sctp_print_tuple(struct seq_file *s,
const struct nf_conntrack_tuple *tuple)
{
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
return seq_printf(s, "sport=%hu dport=%hu ",
ntohs(tuple->src.u.sctp.port),
ntohs(tuple->dst.u.sctp.port));
{
enum sctp_conntrack state;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
read_lock_bh(&sctp_lock);
state = conntrack->proto.sctp.state;
read_unlock_bh(&sctp_lock);
sctp_chunkhdr_t _sch, *sch;
int flag;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
flag = 0;
for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
- DEBUGP("Chunk Num: %d Type: %d\n", count, sch->type);
+ pr_debug("Chunk Num: %d Type: %d\n", count, sch->type);
- if (sch->type == SCTP_CID_INIT
+ if (sch->type == SCTP_CID_INIT
|| sch->type == SCTP_CID_INIT_ACK
|| sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
flag = 1;
|| sch->type == SCTP_CID_COOKIE_ECHO
|| flag)
&& count !=0) || !sch->length) {
- DEBUGP("Basic checks failed\n");
+ pr_debug("Basic checks failed\n");
return 1;
}
}
}
- DEBUGP("Basic checks passed\n");
+ pr_debug("Basic checks passed\n");
return count == 0;
}
{
int i;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
- DEBUGP("Chunk type: %d\n", chunk_type);
+ pr_debug("Chunk type: %d\n", chunk_type);
switch (chunk_type) {
- case SCTP_CID_INIT:
- DEBUGP("SCTP_CID_INIT\n");
+ case SCTP_CID_INIT:
+ pr_debug("SCTP_CID_INIT\n");
i = 0; break;
- case SCTP_CID_INIT_ACK:
- DEBUGP("SCTP_CID_INIT_ACK\n");
+ case SCTP_CID_INIT_ACK:
+ pr_debug("SCTP_CID_INIT_ACK\n");
i = 1; break;
- case SCTP_CID_ABORT:
- DEBUGP("SCTP_CID_ABORT\n");
+ case SCTP_CID_ABORT:
+ pr_debug("SCTP_CID_ABORT\n");
i = 2; break;
- case SCTP_CID_SHUTDOWN:
- DEBUGP("SCTP_CID_SHUTDOWN\n");
+ case SCTP_CID_SHUTDOWN:
+ pr_debug("SCTP_CID_SHUTDOWN\n");
i = 3; break;
- case SCTP_CID_SHUTDOWN_ACK:
- DEBUGP("SCTP_CID_SHUTDOWN_ACK\n");
+ case SCTP_CID_SHUTDOWN_ACK:
+ pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
i = 4; break;
- case SCTP_CID_ERROR:
- DEBUGP("SCTP_CID_ERROR\n");
+ case SCTP_CID_ERROR:
+ pr_debug("SCTP_CID_ERROR\n");
i = 5; break;
- case SCTP_CID_COOKIE_ECHO:
- DEBUGP("SCTP_CID_COOKIE_ECHO\n");
+ case SCTP_CID_COOKIE_ECHO:
+ pr_debug("SCTP_CID_COOKIE_ECHO\n");
i = 6; break;
- case SCTP_CID_COOKIE_ACK:
- DEBUGP("SCTP_CID_COOKIE_ACK\n");
+ case SCTP_CID_COOKIE_ACK:
+ pr_debug("SCTP_CID_COOKIE_ACK\n");
i = 7; break;
- case SCTP_CID_SHUTDOWN_COMPLETE:
- DEBUGP("SCTP_CID_SHUTDOWN_COMPLETE\n");
+ case SCTP_CID_SHUTDOWN_COMPLETE:
+ pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
i = 8; break;
default:
/* Other chunks like DATA, SACK, HEARTBEAT and
its ACK do not cause a change in state */
- DEBUGP("Unknown chunk type, Will stay in %s\n",
- sctp_conntrack_names[cur_state]);
+ pr_debug("Unknown chunk type, Will stay in %s\n",
+ sctp_conntrack_names[cur_state]);
return cur_state;
}
- DEBUGP("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
- dir, sctp_conntrack_names[cur_state], chunk_type,
- sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]);
+ pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
+ dir, sctp_conntrack_names[cur_state], chunk_type,
+ sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]);
return sctp_conntracks[dir][i][cur_state];
}
u_int32_t offset, count;
char map[256 / sizeof (char)] = {0};
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
if (sh == NULL)
return -1;
&& !test_bit(SCTP_CID_ABORT, (void *)map)
&& !test_bit(SCTP_CID_SHUTDOWN_ACK, (void *)map)
&& (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
- DEBUGP("Verification tag check failed\n");
+ pr_debug("Verification tag check failed\n");
return -1;
}
/* Sec 8.5.1 (C) */
if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
&& !(sh->vtag == conntrack->proto.sctp.vtag
- [1 - CTINFO2DIR(ctinfo)]
+ [1 - CTINFO2DIR(ctinfo)]
&& (sch->flags & 1))) {
write_unlock_bh(&sctp_lock);
return -1;
/* Invalid */
if (newconntrack == SCTP_CONNTRACK_MAX) {
- DEBUGP("nf_conntrack_sctp: Invalid dir=%i ctype=%u conntrack=%u\n",
- CTINFO2DIR(ctinfo), sch->type, oldsctpstate);
+ pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u "
+ "conntrack=%u\n",
+ CTINFO2DIR(ctinfo), sch->type, oldsctpstate);
write_unlock_bh(&sctp_lock);
return -1;
}
/* If it is an INIT or an INIT ACK note down the vtag */
- if (sch->type == SCTP_CID_INIT
+ if (sch->type == SCTP_CID_INIT
|| sch->type == SCTP_CID_INIT_ACK) {
sctp_inithdr_t _inithdr, *ih;
ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
- sizeof(_inithdr), &_inithdr);
+ sizeof(_inithdr), &_inithdr);
if (ih == NULL) {
write_unlock_bh(&sctp_lock);
return -1;
}
- DEBUGP("Setting vtag %x for dir %d\n",
- ih->init_tag, !CTINFO2DIR(ctinfo));
+ pr_debug("Setting vtag %x for dir %d\n",
+ ih->init_tag, !CTINFO2DIR(ctinfo));
conntrack->proto.sctp.vtag[!CTINFO2DIR(ctinfo)] = ih->init_tag;
}
if (oldsctpstate == SCTP_CONNTRACK_COOKIE_ECHOED
&& CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY
&& newconntrack == SCTP_CONNTRACK_ESTABLISHED) {
- DEBUGP("Setting assured bit\n");
+ pr_debug("Setting assured bit\n");
set_bit(IPS_ASSURED_BIT, &conntrack->status);
nf_conntrack_event_cache(IPCT_STATUS, skb);
}
u_int32_t offset, count;
char map[256 / sizeof (char)] = {0};
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
-
sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
if (sh == NULL)
return 0;
newconntrack = SCTP_CONNTRACK_MAX;
for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
/* Don't need lock here: this conntrack not in circulation yet */
- newconntrack = new_state(IP_CT_DIR_ORIGINAL,
+ newconntrack = new_state(IP_CT_DIR_ORIGINAL,
SCTP_CONNTRACK_NONE, sch->type);
/* Invalid: delete conntrack */
- if (newconntrack == SCTP_CONNTRACK_MAX) {
- DEBUGP("nf_conntrack_sctp: invalid new deleting.\n");
+ if (newconntrack == SCTP_CONNTRACK_NONE ||
+ newconntrack == SCTP_CONNTRACK_MAX) {
+ pr_debug("nf_conntrack_sctp: invalid new deleting.\n");
return 0;
}
sctp_inithdr_t _inithdr, *ih;
ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
- sizeof(_inithdr), &_inithdr);
+ sizeof(_inithdr), &_inithdr);
if (ih == NULL)
return 0;
- DEBUGP("Setting vtag %x for new conn\n",
- ih->init_tag);
+ pr_debug("Setting vtag %x for new conn\n",
+ ih->init_tag);
- conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] =
+ conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] =
ih->init_tag;
} else {
/* Sec 8.5.1 (A) */
/* If it is a shutdown ack OOTB packet, we expect a return
shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
else {
- DEBUGP("Setting vtag %x for new conn OOTB\n",
- sh->vtag);
+ pr_debug("Setting vtag %x for new conn OOTB\n",
+ sh->vtag);
conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag;
}
static struct ctl_table_header *sctp_sysctl_header;
static struct ctl_table sctp_sysctl_table[] = {
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,
.procname = "nf_conntrack_sctp_timeout_closed",
.data = &nf_ct_sctp_timeout_closed,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,
.procname = "nf_conntrack_sctp_timeout_cookie_wait",
.data = &nf_ct_sctp_timeout_cookie_wait,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,
.procname = "nf_conntrack_sctp_timeout_cookie_echoed",
.data = &nf_ct_sctp_timeout_cookie_echoed,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,
.procname = "nf_conntrack_sctp_timeout_established",
.data = &nf_ct_sctp_timeout_established,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,
.procname = "nf_conntrack_sctp_timeout_shutdown_sent",
.data = &nf_ct_sctp_timeout_shutdown_sent,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,
.procname = "nf_conntrack_sctp_timeout_shutdown_recd",
.data = &nf_ct_sctp_timeout_shutdown_recd,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT,
.procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
.data = &nf_ct_sctp_timeout_shutdown_ack_sent,
.maxlen = sizeof(unsigned int),
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
static struct ctl_table sctp_compat_sysctl_table[] = {
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,
.procname = "ip_conntrack_sctp_timeout_closed",
.data = &nf_ct_sctp_timeout_closed,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,
.procname = "ip_conntrack_sctp_timeout_cookie_wait",
.data = &nf_ct_sctp_timeout_cookie_wait,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,
.procname = "ip_conntrack_sctp_timeout_cookie_echoed",
.data = &nf_ct_sctp_timeout_cookie_echoed,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,
.procname = "ip_conntrack_sctp_timeout_established",
.data = &nf_ct_sctp_timeout_established,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,
.procname = "ip_conntrack_sctp_timeout_shutdown_sent",
.data = &nf_ct_sctp_timeout_shutdown_sent,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,
.procname = "ip_conntrack_sctp_timeout_shutdown_recd",
.data = &nf_ct_sctp_timeout_shutdown_recd,
.maxlen = sizeof(unsigned int),
.proc_handler = &proc_dointvec_jiffies,
},
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT,
.procname = "ip_conntrack_sctp_timeout_shutdown_ack_sent",
.data = &nf_ct_sctp_timeout_shutdown_ack_sent,
.maxlen = sizeof(unsigned int),
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif
-struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 = {
+static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = {
.l3proto = PF_INET,
.l4proto = IPPROTO_SCTP,
.name = "sctp",
#endif
};
-struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 = {
+static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = {
.l3proto = PF_INET6,
.l4proto = IPPROTO_SCTP,
.name = "sctp",
cleanup_sctp4:
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
out:
- DEBUGP("SCTP conntrack module loading %s\n",
- ret ? "failed": "succeeded");
return ret;
}
{
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp6);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
- DEBUGP("SCTP conntrack module unloaded\n");
}
module_init(nf_conntrack_proto_sctp_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff