git: 79b69575d838 - stable/13 - pf: support SCTP-specific timeouts
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Date: Tue, 07 Nov 2023 15:47:26 UTC
The branch stable/13 has been updated by kp:
URL: https://cgit.FreeBSD.org/src/commit/?id=79b69575d838f40a96b3ef68aa633a84da04c9df
commit 79b69575d838f40a96b3ef68aa633a84da04c9df
Author: Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2023-10-27 14:45:07 +0000
Commit: Kristof Provost <kp@FreeBSD.org>
CommitDate: 2023-11-07 15:25:02 +0000
pf: support SCTP-specific timeouts
Allow SCTP state timeouts to be configured independently from TCP state
timeouts.
Reviewed by: tuexen
MFC after: 1 week
Sponsored by: Orange Business Services
Differential Revision: https://reviews.freebsd.org/D42393
(cherry picked from commit ca9dbde88122beb079b55fb4580b200f73044da6)
---
sbin/pfctl/pfctl.c | 5 +++++
sbin/pfctl/pfctl_parser.c | 5 +++++
sbin/pfctl/tests/files/pf1002.in | 5 +++++
sbin/pfctl/tests/files/pf1002.ok | 5 +++++
share/man/man5/pf.conf.5 | 19 ++++++++++++++++++-
sys/netpfil/pf/pf.c | 14 +++++++++-----
sys/netpfil/pf/pf.h | 41 +++++++++++++++++++++++++++++++---------
sys/netpfil/pf/pf_ioctl.c | 5 +++++
8 files changed, 84 insertions(+), 15 deletions(-)
diff --git a/sbin/pfctl/pfctl.c b/sbin/pfctl/pfctl.c
index 645ba1d6fcaf..985cbe0771c0 100644
--- a/sbin/pfctl/pfctl.c
+++ b/sbin/pfctl/pfctl.c
@@ -1856,6 +1856,11 @@ pfctl_init_options(struct pfctl *pf)
pf->timeout[PFTM_TCP_CLOSING] = PFTM_TCP_CLOSING_VAL;
pf->timeout[PFTM_TCP_FIN_WAIT] = PFTM_TCP_FIN_WAIT_VAL;
pf->timeout[PFTM_TCP_CLOSED] = PFTM_TCP_CLOSED_VAL;
+ pf->timeout[PFTM_SCTP_FIRST_PACKET] = PFTM_TCP_FIRST_PACKET_VAL;
+ pf->timeout[PFTM_SCTP_OPENING] = PFTM_TCP_OPENING_VAL;
+ pf->timeout[PFTM_SCTP_ESTABLISHED] = PFTM_TCP_ESTABLISHED_VAL;
+ pf->timeout[PFTM_SCTP_CLOSING] = PFTM_TCP_CLOSING_VAL;
+ pf->timeout[PFTM_SCTP_CLOSED] = PFTM_TCP_CLOSED_VAL;
pf->timeout[PFTM_UDP_FIRST_PACKET] = PFTM_UDP_FIRST_PACKET_VAL;
pf->timeout[PFTM_UDP_SINGLE] = PFTM_UDP_SINGLE_VAL;
pf->timeout[PFTM_UDP_MULTIPLE] = PFTM_UDP_MULTIPLE_VAL;
diff --git a/sbin/pfctl/pfctl_parser.c b/sbin/pfctl/pfctl_parser.c
index a3863cb23ac6..ed152eca0010 100644
--- a/sbin/pfctl/pfctl_parser.c
+++ b/sbin/pfctl/pfctl_parser.c
@@ -192,6 +192,11 @@ const struct pf_timeout pf_timeouts[] = {
{ "tcp.finwait", PFTM_TCP_FIN_WAIT },
{ "tcp.closed", PFTM_TCP_CLOSED },
{ "tcp.tsdiff", PFTM_TS_DIFF },
+ { "sctp.first", PFTM_SCTP_FIRST_PACKET },
+ { "sctp.opening", PFTM_SCTP_OPENING },
+ { "sctp.established", PFTM_SCTP_ESTABLISHED },
+ { "sctp.closing", PFTM_SCTP_CLOSING },
+ { "sctp.closed", PFTM_SCTP_CLOSED },
{ "udp.first", PFTM_UDP_FIRST_PACKET },
{ "udp.single", PFTM_UDP_SINGLE },
{ "udp.multiple", PFTM_UDP_MULTIPLE },
diff --git a/sbin/pfctl/tests/files/pf1002.in b/sbin/pfctl/tests/files/pf1002.in
index 5180e8395f9c..3fdde81be7de 100644
--- a/sbin/pfctl/tests/files/pf1002.in
+++ b/sbin/pfctl/tests/files/pf1002.in
@@ -1 +1,6 @@
set timeout interval 10
+set timeout sctp.first 11
+set timeout sctp.opening 12
+set timeout sctp.established 13
+set timeout sctp.closing 14
+set timeout sctp.closed 15
diff --git a/sbin/pfctl/tests/files/pf1002.ok b/sbin/pfctl/tests/files/pf1002.ok
index 5180e8395f9c..3fdde81be7de 100644
--- a/sbin/pfctl/tests/files/pf1002.ok
+++ b/sbin/pfctl/tests/files/pf1002.ok
@@ -1 +1,6 @@
set timeout interval 10
+set timeout sctp.first 11
+set timeout sctp.opening 12
+set timeout sctp.established 13
+set timeout sctp.closing 14
+set timeout sctp.closed 15
diff --git a/share/man/man5/pf.conf.5 b/share/man/man5/pf.conf.5
index fa7bdc9587b2..6168bc3e8089 100644
--- a/share/man/man5/pf.conf.5
+++ b/share/man/man5/pf.conf.5
@@ -27,7 +27,7 @@
.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd June 21, 2023
+.Dd October 27, 2023
.Dt PF.CONF 5
.Os
.Sh NAME
@@ -281,6 +281,21 @@ can prevent blocking of such packets.
The state after one endpoint sends an RST.
.El
.Pp
+SCTP timeout are handled similar to TCP, but with its own set of states:
+.Pp
+.Bl -tag -width xxxx -compact
+.It Ar sctp.first
+The state after the first packet.
+.It Ar sctp.opening
+The state before the destination host ever sends a packet.
+.It Ar sctp.established
+The fully established state.
+.It Ar sctp.closing
+The state after the first SHUTDOWN chunk has been sent.
+.It Ar sctp.closed
+The state after SHUTDOWN_ACK has been exchanged and the connection is closed.
+.El
+.Pp
ICMP and UDP are handled in a fashion similar to TCP, but with a much more
limited set of states:
.Pp
@@ -3120,6 +3135,8 @@ fragmentation = [ "fragment reassemble" ]
timeout-list = timeout [ [ "," ] timeout-list ]
timeout = ( "tcp.first" | "tcp.opening" | "tcp.established" |
"tcp.closing" | "tcp.finwait" | "tcp.closed" |
+ "sctp.first" | "sctp.opening" | "sctp.established" |
+ "sctp.closing" | "sctp.closed" |
"udp.first" | "udp.single" | "udp.multiple" |
"icmp.first" | "icmp.error" |
"other.first" | "other.single" | "other.multiple" |
diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c
index 278aa07fab75..7bac94f77a32 100644
--- a/sys/netpfil/pf/pf.c
+++ b/sys/netpfil/pf/pf.c
@@ -4336,7 +4336,7 @@ pf_create_state(struct pf_krule *r, struct pf_krule *nr, struct pf_krule *a,
case IPPROTO_SCTP:
pf_set_protostate(s, PF_PEER_SRC, SCTP_COOKIE_WAIT);
pf_set_protostate(s, PF_PEER_DST, SCTP_CLOSED);
- s->timeout = PFTM_TCP_FIRST_PACKET;
+ s->timeout = PFTM_SCTP_FIRST_PACKET;
break;
case IPPROTO_ICMP:
#ifdef INET6
@@ -5326,7 +5326,7 @@ pf_test_state_sctp(struct pf_kstate **state, struct pfi_kkif *kif,
if (pd->sctp_flags & PFDESC_SCTP_INIT) {
if (src->state < SCTP_COOKIE_WAIT) {
pf_set_protostate(*state, psrc, SCTP_COOKIE_WAIT);
- (*state)->timeout = PFTM_TCP_OPENING;
+ (*state)->timeout = PFTM_SCTP_OPENING;
}
}
if (pd->sctp_flags & PFDESC_SCTP_INIT_ACK) {
@@ -5338,16 +5338,20 @@ pf_test_state_sctp(struct pf_kstate **state, struct pfi_kkif *kif,
if (pd->sctp_flags & PFDESC_SCTP_COOKIE) {
if (src->state < SCTP_ESTABLISHED) {
pf_set_protostate(*state, psrc, SCTP_ESTABLISHED);
- (*state)->timeout = PFTM_TCP_ESTABLISHED;
+ (*state)->timeout = PFTM_SCTP_ESTABLISHED;
}
}
if (pd->sctp_flags & (PFDESC_SCTP_SHUTDOWN | PFDESC_SCTP_ABORT |
PFDESC_SCTP_SHUTDOWN_COMPLETE)) {
if (src->state < SCTP_SHUTDOWN_PENDING) {
pf_set_protostate(*state, psrc, SCTP_SHUTDOWN_PENDING);
- (*state)->timeout = PFTM_TCP_CLOSING;
+ (*state)->timeout = PFTM_SCTP_CLOSING;
}
}
+ if (pd->sctp_flags & (PFDESC_SCTP_SHUTDOWN_COMPLETE)) {
+ pf_set_protostate(*state, psrc, SCTP_CLOSED);
+ (*state)->timeout = PFTM_SCTP_CLOSED;
+ }
if (src->scrub != NULL) {
if (src->scrub->pfss_v_tag == 0) {
@@ -5627,7 +5631,7 @@ again:
psrc = PF_PEER_DST;
}
pf_set_protostate(sm, psrc, SCTP_SHUTDOWN_PENDING);
- sm->timeout = PFTM_TCP_CLOSING;
+ sm->timeout = PFTM_SCTP_CLOSING;
PF_STATE_UNLOCK(sm);
}
break;
diff --git a/sys/netpfil/pf/pf.h b/sys/netpfil/pf/pf.h
index 0b0e9f05251e..89162ded3ef0 100644
--- a/sys/netpfil/pf/pf.h
+++ b/sys/netpfil/pf/pf.h
@@ -66,14 +66,37 @@ enum { PF_PEER_SRC, PF_PEER_DST, PF_PEER_BOTH };
* Note about PFTM_*: real indices into pf_rule.timeout[] come before
* PFTM_MAX, special cases afterwards. See pf_state_expires().
*/
-enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED,
- PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED,
- PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE,
- PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY,
- PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE,
- PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL,
- PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE,
- PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED };
+enum {
+ PFTM_TCP_FIRST_PACKET = 0,
+ PFTM_TCP_OPENING = 1,
+ PFTM_TCP_ESTABLISHED = 2,
+ PFTM_TCP_CLOSING = 3,
+ PFTM_TCP_FIN_WAIT = 4,
+ PFTM_TCP_CLOSED = 5,
+ PFTM_UDP_FIRST_PACKET = 6,
+ PFTM_UDP_SINGLE = 7,
+ PFTM_UDP_MULTIPLE = 8,
+ PFTM_ICMP_FIRST_PACKET = 9,
+ PFTM_ICMP_ERROR_REPLY = 10,
+ PFTM_OTHER_FIRST_PACKET = 11,
+ PFTM_OTHER_SINGLE = 12,
+ PFTM_OTHER_MULTIPLE = 13,
+ PFTM_FRAG = 14,
+ PFTM_INTERVAL = 15,
+ PFTM_ADAPTIVE_START = 16,
+ PFTM_ADAPTIVE_END = 17,
+ PFTM_SRC_NODE = 18,
+ PFTM_TS_DIFF = 19,
+ PFTM_OLD_MAX = 20, /* Legacy limit, for binary compatibility with old kernels. */
+ PFTM_SCTP_FIRST_PACKET = 20,
+ PFTM_SCTP_OPENING = 21,
+ PFTM_SCTP_ESTABLISHED = 22,
+ PFTM_SCTP_CLOSING = 23,
+ PFTM_SCTP_CLOSED = 24,
+ PFTM_MAX = 25,
+ PFTM_PURGE = 26,
+ PFTM_UNLINKED = 27,
+};
/* PFTM default values */
#define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */
@@ -503,7 +526,7 @@ struct pf_rule {
pf_osfp_t os_fingerprint;
int rtableid;
- u_int32_t timeout[PFTM_MAX];
+ u_int32_t timeout[PFTM_OLD_MAX];
u_int32_t max_states;
u_int32_t max_src_nodes;
u_int32_t max_src_states;
diff --git a/sys/netpfil/pf/pf_ioctl.c b/sys/netpfil/pf/pf_ioctl.c
index bd005893f7c8..44b0bccc7489 100644
--- a/sys/netpfil/pf/pf_ioctl.c
+++ b/sys/netpfil/pf/pf_ioctl.c
@@ -354,6 +354,11 @@ pfattach_vnet(void)
my_timeout[PFTM_TCP_CLOSING] = PFTM_TCP_CLOSING_VAL;
my_timeout[PFTM_TCP_FIN_WAIT] = PFTM_TCP_FIN_WAIT_VAL;
my_timeout[PFTM_TCP_CLOSED] = PFTM_TCP_CLOSED_VAL;
+ my_timeout[PFTM_SCTP_FIRST_PACKET] = PFTM_TCP_FIRST_PACKET_VAL;
+ my_timeout[PFTM_SCTP_OPENING] = PFTM_TCP_OPENING_VAL;
+ my_timeout[PFTM_SCTP_ESTABLISHED] = PFTM_TCP_ESTABLISHED_VAL;
+ my_timeout[PFTM_SCTP_CLOSING] = PFTM_TCP_CLOSING_VAL;
+ my_timeout[PFTM_SCTP_CLOSED] = PFTM_TCP_CLOSED_VAL;
my_timeout[PFTM_UDP_FIRST_PACKET] = PFTM_UDP_FIRST_PACKET_VAL;
my_timeout[PFTM_UDP_SINGLE] = PFTM_UDP_SINGLE_VAL;
my_timeout[PFTM_UDP_MULTIPLE] = PFTM_UDP_MULTIPLE_VAL;