[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/iptables/libipq/Makefile.am b/ap/app/iptables/libipq/Makefile.am
new file mode 100755
index 0000000..f19950f
--- /dev/null
+++ b/ap/app/iptables/libipq/Makefile.am
@@ -0,0 +1,10 @@
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+man_MANS = ipq_create_handle.3 ipq_destroy_handle.3 ipq_errstr.3 \
+ ipq_get_msgerr.3 ipq_get_packet.3 ipq_message_type.3 \
+ ipq_perror.3 ipq_read.3 ipq_set_mode.3 ipq_set_verdict.3 \
+ libipq.3
diff --git a/ap/app/iptables/libipq/Makefile.in b/ap/app/iptables/libipq/Makefile.in
new file mode 100755
index 0000000..a27cdc5
--- /dev/null
+++ b/ap/app/iptables/libipq/Makefile.in
@@ -0,0 +1,537 @@
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+ tags uninstall uninstall-am uninstall-libLIBRARIES \
+ uninstall-man uninstall-man3
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/ap/app/iptables/libipq/ipq_create_handle.3 b/ap/app/iptables/libipq/ipq_create_handle.3
new file mode 100755
index 0000000..7840277
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_create_handle.3
@@ -0,0 +1,84 @@
+.TH IPQ_CREATE_HANDLE 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+\" $Id: ipq_create_handle.3,v 1.2 2001/10/16 14:41:02 jamesm Exp $
+.\"
+.\" Copyright (c) 2000-2001 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+ipq_create_handle, ipq_destroy_handle - create and destroy libipq handles.
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.sp
+.BI "struct ipq_handle *ipq_create_handle(u_int32_t " flags ", u_int32_t " protocol ");"
+.br
+.BI "int ipq_destroy_handle(struct ipq_handle *" h );
+.SH DESCRIPTION
+The
+.B ipq_create_handle
+function initialises libipq for an application, attempts to bind to the
+Netlink socket used by ip_queue, and returns an opaque context handle. It
+should be the first libipq function to be called by an application. The
+handle returned should be used in all subsequent library calls which
+require a handle parameter.
+.PP
+The
+.I flags
+parameter is not currently used and should be set to zero by the application
+for forward compatibility.
+.PP
+The
+.I protocol
+parameter is used to specify the protocol of the packets to be queued.
+Valid values are NFPROTO_IPV4 for IPv4 and NFPROTO_IPV6 for IPv6. Currently,
+only one protocol may be queued at a time for a handle.
+.PP
+The
+.B ipq_destroy_handle
+function frees up resources allocated by
+.BR ipq_create_handle ,
+and should be used when the handle is no longer required by the application.
+.SH RETURN VALUES
+On success,
+.B ipq_create_handle
+returns a pointer to a context handle.
+.br
+On failure, NULL is returned.
+.PP
+On success,
+.B ipq_destroy_handle
+returns zero.
+.br
+On failure, -1 is returned.
+.SH ERRORS
+On failure, a descriptive error message will be available
+via the
+.B ipq_errstr
+function.
+.SH BUGS
+None known.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH SEE ALSO
+.BR iptables (8),
+.BR libipq (3).
diff --git a/ap/app/iptables/libipq/ipq_destroy_handle.3 b/ap/app/iptables/libipq/ipq_destroy_handle.3
new file mode 100755
index 0000000..29dcd98
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_destroy_handle.3
@@ -0,0 +1 @@
+.so man3/ipq_create_handle.3
diff --git a/ap/app/iptables/libipq/ipq_errstr.3 b/ap/app/iptables/libipq/ipq_errstr.3
new file mode 100755
index 0000000..9661469
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_errstr.3
@@ -0,0 +1,66 @@
+.TH IPQ_ERRSTR 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+.\" $Id: ipq_errstr.3,v 1.1 2000/11/20 14:13:32 jamesm Exp $
+.\"
+.\" Copyright (c) 2000 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+ipq_errstr, ipq_perror - libipq error handling routines
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.sp
+.BI "char *ipq_errstr(" void );
+.br
+.BI "void ipq_perror(const char *" s );
+.SH DESCRIPTION
+The
+.B ipq_errstr
+function returns a descriptive error message based on the current
+value of the internal
+.B ipq_errno
+variable. All libipq API functions set this internal variable
+upon failure.
+.PP
+The
+.B ipq_perror
+function prints an error message to stderr corresponding to the
+current value of the internal
+.B ipq_error
+variable, and the global
+.B errno
+variable (if set). The error message is prefixed with the string
+.I s
+as supplied by the application. If
+.I s
+is NULL, the error message is prefixed with the string "ERROR".
+.SH RETURN VALUE
+.B ipq_errstr
+returns an error message as outlined above.
+.SH BUGS
+None known.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH SEE ALSO
+.BR iptables (8),
+.BR libipq (3).
diff --git a/ap/app/iptables/libipq/ipq_get_msgerr.3 b/ap/app/iptables/libipq/ipq_get_msgerr.3
new file mode 100755
index 0000000..8a28be3
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_get_msgerr.3
@@ -0,0 +1 @@
+.so man3/ipq_message_type.3
diff --git a/ap/app/iptables/libipq/ipq_get_packet.3 b/ap/app/iptables/libipq/ipq_get_packet.3
new file mode 100755
index 0000000..8a28be3
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_get_packet.3
@@ -0,0 +1 @@
+.so man3/ipq_message_type.3
diff --git a/ap/app/iptables/libipq/ipq_message_type.3 b/ap/app/iptables/libipq/ipq_message_type.3
new file mode 100755
index 0000000..0594518
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_message_type.3
@@ -0,0 +1,136 @@
+.TH IPQ_MESSAGE_TYPE 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+.\" $Id: ipq_message_type.3,v 1.1 2000/11/20 14:13:32 jamesm Exp $
+.\"
+.\" Copyright (c) 2000-2001 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+ipq_message_type, ipq_get_packet, ipq_getmsgerr - query queue messages
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.sp
+.BI "int ipq_message_type(const unsigned char *" buf ");"
+.br
+.BI "ipq_packet_msg_t *ipq_get_packet(const unsigned char *" buf ");"
+.br
+.BI "int ipq_get_msgerr(const unsigned char *" buf ");"
+.SH DESCRIPTION
+The
+.B ipq_message_type
+function returns the type of queue message returned to userspace
+via
+.BR ipq_read .
+.PP
+.B ipq_message_type
+should always be called following a successful call to
+.B ipq_read
+to determine whether the message is a packet message or an
+error message. The
+.I buf
+parameter should be the same data obtained from
+the previous call to
+.BR ipq_read .
+.PP
+.B ipq_message_type
+will return one of the following values:
+.TP
+.B NLMSG_ERROR
+An error message generated by the Netlink transport.
+.PP
+.TP
+.B IPQM_PACKET
+A packet message containing packet metadata and optional packet payload data.
+.PP
+The
+.B ipq_get_packet
+function should be called if
+.B ipq_message_type
+returns
+.BR IPQM_PACKET .
+The
+.I buf
+parameter should point to the same data used for the call to
+.BR ipq_message_type .
+The pointer returned by
+.B ipq_get_packet
+points to a packet message, which is declared as follows:
+.PP
+.RS
+.nf
+typedef struct ipq_packet_msg {
+ unsigned long packet_id; /* ID of queued packet */
+ unsigned long mark; /* Netfilter mark value */
+ long timestamp_sec; /* Packet arrival time (seconds) */
+ long timestamp_usec; /* Packet arrvial time (+useconds) */
+ unsigned int hook; /* Netfilter hook we rode in on */
+ char indev_name[IFNAMSIZ]; /* Name of incoming interface */
+ char outdev_name[IFNAMSIZ]; /* Name of outgoing interface */
+ unsigned short hw_protocol; /* Hardware protocol (network order) */
+ unsigned short hw_type; /* Hardware type */
+ unsigned char hw_addrlen; /* Hardware address length */
+ unsigned char hw_addr[8]; /* Hardware address */
+ size_t data_len; /* Length of packet data */
+ unsigned char payload[0]; /* Optional packet data */
+} ipq_packet_msg_t;
+.fi
+.RE
+.PP
+Each of these fields may be read by the application. If the queue mode
+is
+.B IPQ_COPY_PACKET
+and the
+.I data_len
+value is greater than zero, the packet payload contents may be accessed
+in the memory following the
+.B ipq_packet_msg_t
+structure to a range of
+.I data_len.
+.PP
+The
+.I packet_id
+field contains a packet identifier to be used when calling
+.BR ipq_set_verdict .
+.PP
+The
+.B ipq_get_msgerr
+function should be called if
+.B ipq_message_type
+returns
+.BR NLMSG_ERROR.
+The
+.I buf
+parameter should point to the same data used for the call to
+.BR ipq_message_type .
+The value returned by
+.B ipq_get_msgerr
+is set by higher level kernel code and corresponds to standard
+.B errno
+values.
+.SH BUGS
+None known.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH SEE ALSO
+.BR iptables (8),
+.BR libipq (3).
diff --git a/ap/app/iptables/libipq/ipq_perror.3 b/ap/app/iptables/libipq/ipq_perror.3
new file mode 100755
index 0000000..6efd53d
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_perror.3
@@ -0,0 +1 @@
+.so man3/ipq_errstr.3
diff --git a/ap/app/iptables/libipq/ipq_read.3 b/ap/app/iptables/libipq/ipq_read.3
new file mode 100755
index 0000000..5d96737
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_read.3
@@ -0,0 +1,106 @@
+.TH IPQ_READ 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+.\" $Id: ipq_read.3,v 1.2 2001/10/16 14:41:02 jamesm Exp $
+.\"
+.\" Copyright (c) 2000-2001 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+ipq_read - read queue messages from ip_queue and read into supplied buffer
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.sp
+.BI "ssize_t ipq_read(const struct ipq_handle *" h ", unsigned char *" buf ", size_t " len ", int " timeout ");"
+.SH DESCRIPTION
+The
+.B ipq_read
+function reads a queue message from the kernel and copies it to
+the memory pointed to by
+.I buf
+to a maximum length of
+. IR len .
+.PP
+The
+.I h
+parameter is a context handle which must previously have been returned
+successfully from a call to
+.BR ipq_create_handle .
+.PP
+The caller is responsible for ensuring that the memory pointed to by
+.I buf
+is large enough to contain
+.I len
+bytes.
+.PP
+The
+.I timeout
+parameter may be used to set a timeout for the operation, specified in microseconds.
+This is implemented internally by the library via the
+.BR select
+system call. A value of zero provides normal, backwards-compatible blocking behaviour
+with no timeout. A negative value causes the function to return immediately.
+.PP
+Data returned via
+.I buf
+should not be accessed directly. Use the
+.BR ipq_message_type ,
+.BR ipq_get_packet ", and"
+.BR ipq_get_msgerr
+functions to access the queue message in the buffer.
+.SH RETURN VALUE
+On failure, -1 is returned.
+.br
+On success, a non-zero positive value is returned when no timeout
+value is specified.
+.br
+On success with a timeout value specified, zero is returned if no data
+was available to read, or if a non-blocked signal was caught. In the
+latter case, the global
+.B errno
+value will be set to
+.BR EINTR .
+.SH ERRORS
+On error, a descriptive error message will be available
+via the
+.B ipq_errstr
+function.
+.SH DIAGNOSTICS
+While the
+.B ipq_read
+function may return successfully, the queue message copied to the buffer
+may itself be an error message from a higher level kernel component. Use
+.B ipq_message_type
+to determine if it is an error message, and
+.B ipq_get_msgerr
+to access the value of the message.
+.SH BUGS
+None known.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH CREDITS
+Joost Remijn implemented the timeout feature, which appeared in the 1.2.4 release of iptables.
+.SH SEE ALSO
+.BR iptables (8),
+.BR libipq (3),
+.BR select (2).
+
diff --git a/ap/app/iptables/libipq/ipq_set_mode.3 b/ap/app/iptables/libipq/ipq_set_mode.3
new file mode 100755
index 0000000..241581e
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_set_mode.3
@@ -0,0 +1,107 @@
+.TH IPQ_SET_MODE 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+.\" $Id: ipq_set_mode.3,v 1.1 2000/11/20 14:13:32 jamesm Exp $
+.\"
+.\" Copyright (c) 2000-2001 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+ipq_set_mode - set the ip_queue queuing mode
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.sp
+.BI "int ipq_set_mode(const struct ipq_handle *" h ", u_int8_t " mode ", size_t " range );
+.SH DESCRIPTION
+The
+.B ipq_set_mode
+function sends a message to the kernel ip_queue module, specifying whether
+packet metadata only, or packet payloads as well as metadata should be copied to
+userspace.
+.PP
+The
+.I h
+parameter is a context handle which must previously have been returned
+successfully from a call to
+.BR ipq_create_handle .
+.PP
+The
+.I mode
+parameter must be one of:
+.TP
+.B IPQ_COPY_META
+Copy only packet metadata to userspace.
+.TP
+.B IPQ_COPY_PACKET
+Copy packet metadata and packet payloads to userspace.
+.PP
+The
+.I range
+parameter is used to specify how many bytes of the payload to copy
+to userspace. It is only valid for
+.B IPQ_COPY_PACKET
+mode and is otherwise ignored. The maximum useful value for
+.I range
+is 65535 (greater values will be clamped to this by ip_queue).
+.PP
+.B ipq_set_mode
+is usually used immediately following
+.B ipq_create_handle
+to enable the flow of packets to userspace.
+.PP
+Note that as the underlying Netlink messaging transport is connectionless,
+the ip_queue module does not know that a userspace application is ready to
+communicate until it receives a message such as this.
+.SH RETURN VALUE
+On failure, -1 is returned.
+.br
+On success, a non-zero positive value is returned.
+.SH ERRORS
+On failure, a descriptive error message will be available
+via the
+.B ipq_errstr
+function.
+.SH DIAGNOSTICS
+A relatively common failure may occur if the ip_queue module is not loaded.
+In this case, the following code excerpt:
+.PP
+.RS
+.nf
+status = ipq_set_mode(h, IPQ_COPY_META, 0);
+if (status < 0) {
+ ipq_perror("myapp");
+ ipq_destroy_handle(h);
+ exit(1);
+}
+.RE
+.fi
+.PP
+would generate the following output:
+.PP
+.I myapp: Failed to send netlink message: Connection refused
+.SH BUGS
+None known.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH SEE ALSO
+.BR libipq (3),
+.BR iptables (8).
diff --git a/ap/app/iptables/libipq/ipq_set_verdict.3 b/ap/app/iptables/libipq/ipq_set_verdict.3
new file mode 100755
index 0000000..002e9fb
--- /dev/null
+++ b/ap/app/iptables/libipq/ipq_set_verdict.3
@@ -0,0 +1,102 @@
+.TH IPQ_SET_VERDICT 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+.\" $Id: ipq_set_verdict.3,v 1.1 2000/11/20 14:13:32 jamesm Exp $
+.\"
+.\" Copyright (c) 2000-2001 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+ipq_set_verdict - issue verdict and optionally modified packet to kernel
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.sp
+.BI "int ipq_set_verdict(const struct ipq_handle *" h ", ipq_id_t " id ", unsigned int " verdict ", size_t " data_len ", unsigned char *" buf ");"
+.SH DESCRIPTION
+The
+.B ipq_set_verdict
+function issues a verdict on a packet previously obtained with
+.BR ipq_read ,
+specifing the intended disposition of the packet, and optionally
+supplying a modified version of the payload data.
+.PP
+The
+.I h
+parameter is a context handle which must previously have been returned
+successfully from a call to
+.BR ipq_create_handle .
+.PP
+The
+.I id
+parameter is the packet identifier obtained via
+.BR ipq_get_packet .
+.PP
+The
+.I verdict
+parameter must be one of:
+.TP
+.B NF_ACCEPT
+Accept the packet and continue traversal within the kernel.
+.br
+.TP
+.B NF_DROP
+Drop the packet.
+.TP
+\fBNF_QUEUE\fP
+Requeue the packet.
+.PP
+\fBNF_STOLEN\fP and \fBNF_REPEAT\fP are kernel-internal constants and should
+not be used from userspace as their exact side effects have not been
+investigated.
+.PP
+The
+.I data_len
+parameter is the length of the data pointed to
+by
+.IR buf ,
+the optional replacement payload data.
+.PP
+If simply setting a verdict without modifying the payload data, use zero
+for
+.I data_len
+and NULL for
+.IR buf .
+.PP
+The application is responsible for recalculating any packet checksums
+when modifying packets.
+.SH RETURN VALUE
+On failure, -1 is returned.
+.br
+On success, a non-zero positive value is returned.
+.SH ERRORS
+On error, a descriptive error message will be available
+via the
+.B ipq_errstr
+function.
+.SH BUGS
+None known.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH SEE ALSO
+.BR iptables (8),
+.BR libipq (3).
+
diff --git a/ap/app/iptables/libipq/libipq.3 b/ap/app/iptables/libipq/libipq.3
new file mode 100755
index 0000000..9dafa4a
--- /dev/null
+++ b/ap/app/iptables/libipq/libipq.3
@@ -0,0 +1,279 @@
+.TH LIBIPQ 3 "16 October 2001" "Linux iptables 1.2" "Linux Programmer's Manual"
+.\"
+.\" $Id: libipq.3,v 1.4 2001/10/16 16:58:25 jamesm Exp $
+.\"
+.\" Copyright (c) 2000-2001 Netfilter Core Team
+.\"
+.\" This program 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 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program 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 this program; if not, write to the Free Software
+.\" Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+.\"
+.\"
+.SH NAME
+libipq \- iptables userspace packet queuing library.
+.SH SYNOPSIS
+.B #include <linux/netfilter.h>
+.br
+.B #include <libipq.h>
+.SH DESCRIPTION
+libipq is a development library for iptables userspace packet queuing.
+.SS Userspace Packet Queuing
+Netfilter provides a mechanism for passing packets out of the stack for
+queueing to userspace, then receiving these packets back into the kernel
+with a verdict specifying what to do with the packets (such as ACCEPT
+or DROP). These packets may also be modified in userspace prior to
+reinjection back into the kernel.
+.PP
+For each supported protocol, a kernel module called a
+.I queue handler
+may register with Netfilter to perform the mechanics of passing
+packets to and from userspace.
+.PP
+The standard queue handler for IPv4 is ip_queue. It is provided as an
+experimental module with 2.4 kernels, and uses a Netlink socket for
+kernel/userspace communication.
+.PP
+Once ip_queue is loaded, IP packets may be selected with iptables
+and queued for userspace processing via the QUEUE target. For example,
+running the following commands:
+.PP
+ # modprobe iptable_filter
+.br
+ # modprobe ip_queue
+.br
+ # iptables -A OUTPUT -p icmp -j QUEUE
+.PP
+will cause any locally generated ICMP packets (e.g. ping output) to
+be sent to the ip_queue module, which will then attempt to deliver the
+packets to a userspace application. If no userspace application is waiting,
+the packets will be dropped
+.PP
+An application may receive and process these packets via libipq.
+.PP
+.PP
+.SS Libipq Overview
+Libipq provides an API for communicating with ip_queue. The following is
+an overview of API usage, refer to individual man pages for more details
+on each function.
+.PP
+.B Initialisation
+.br
+To initialise the library, call
+.BR ipq_create_handle (3).
+This will attempt to bind to the Netlink socket used by ip_queue and
+return an opaque context handle for subsequent library calls.
+.PP
+.B Setting the Queue Mode
+.br
+.BR ipq_set_mode (3)
+allows the application to specify whether packet metadata, or packet
+payloads as well as metadata are copied to userspace. It is also used to
+initially notify ip_queue that an application is ready to receive queue
+messages.
+.PP
+.B Receiving Packets from the Queue
+.br
+.BR ipq_read (3)
+waits for queue messages to arrive from ip_queue and copies
+them into a supplied buffer.
+Queue messages may be
+.I packet messages
+or
+.I error messages.
+.PP
+The type of packet may be determined with
+.BR ipq_message_type (3).
+.PP
+If it's a packet message, the metadata and optional payload may be retrieved with
+.BR ipq_get_packet (3).
+.PP
+To retrieve the value of an error message, use
+.BR ipq_get_msgerr (3).
+.PP
+.B Issuing Verdicts on Packets
+.br
+To issue a verdict on a packet, and optionally return a modified version
+of the packet to the kernel, call
+.BR ipq_set_verdict (3).
+.PP
+.B Error Handling
+.br
+An error string corresponding to the current value of the internal error
+variable
+.B ipq_errno
+may be obtained with
+.BR ipq_errstr (3).
+.PP
+For simple applications, calling
+.BR ipq_perror (3)
+will print the same message as
+.BR ipq_errstr (3),
+as well as the string corresponding to the global
+.B errno
+value (if set) to stderr.
+.PP
+.B Cleaning Up
+.br
+To free up the Netlink socket and destroy resources associated with
+the context handle, call
+.BR ipq_destroy_handle (3).
+.SH SUMMARY
+.TP 4
+.BR ipq_create_handle (3)
+Initialise library, return context handle.
+.TP
+.BR ipq_set_mode (3)
+Set the queue mode, to copy either packet metadata, or payloads
+as well as metadata to userspace.
+.TP
+.BR ipq_read (3)
+Wait for a queue message to arrive from ip_queue and read it into
+a buffer.
+.TP
+.BR ipq_message_type (3)
+Determine message type in the buffer.
+.TP
+.BR ipq_get_packet (3)
+Retrieve a packet message from the buffer.
+.TP
+.BR ipq_get_msgerr (3)
+Retrieve an error message from the buffer.
+.TP
+.BR ipq_set_verdict (3)
+Set a verdict on a packet, optionally replacing its contents.
+.TP
+.BR ipq_errstr (3)
+Return an error message corresponding to the internal ipq_errno variable.
+.TP
+.BR ipq_perror (3)
+Helper function to print error messages to stderr.
+.TP
+.BR ipq_destroy_handle (3)
+Destroy context handle and associated resources.
+.SH EXAMPLE
+The following is an example of a simple application which receives
+packets and issues NF_ACCEPT verdicts on each packet.
+.RS
+.nf
+/*
+ * This code is GPL.
+ */
+#include <linux/netfilter.h>
+#include <libipq.h>
+#include <stdio.h>
+
+#define BUFSIZE 2048
+
+static void die(struct ipq_handle *h)
+{
+ ipq_perror("passer");
+ ipq_destroy_handle(h);
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ int status;
+ unsigned char buf[BUFSIZE];
+ struct ipq_handle *h;
+
+ h = ipq_create_handle(0, NFPROTO_IPV4);
+ if (!h)
+ die(h);
+
+ status = ipq_set_mode(h, IPQ_COPY_PACKET, BUFSIZE);
+ if (status < 0)
+ die(h);
+
+ do{
+ status = ipq_read(h, buf, BUFSIZE, 0);
+ if (status < 0)
+ die(h);
+
+ switch (ipq_message_type(buf)) {
+ case NLMSG_ERROR:
+ fprintf(stderr, "Received error message %d\\n",
+ ipq_get_msgerr(buf));
+ break;
+
+ case IPQM_PACKET: {
+ ipq_packet_msg_t *m = ipq_get_packet(buf);
+
+ status = ipq_set_verdict(h, m->packet_id,
+ NF_ACCEPT, 0, NULL);
+ if (status < 0)
+ die(h);
+ break;
+ }
+
+ default:
+ fprintf(stderr, "Unknown message type!\\n");
+ break;
+ }
+ } while (1);
+
+ ipq_destroy_handle(h);
+ return 0;
+}
+.RE
+.fi
+.PP
+Pointers to more libipq application examples may be found in The
+Netfilter FAQ.
+.SH DIAGNOSTICS
+For information about monitoring and tuning ip_queue, refer to the
+Linux 2.4 Packet Filtering HOWTO.
+.PP
+If an application modifies a packet, it needs to also update any
+checksums for the packet. Typically, the kernel will silently discard
+modified packets with invalid checksums.
+.SH SECURITY
+Processes require CAP_NET_ADMIN capabilty to access the kernel ip_queue
+module. Such processes can potentially access and modify any IP packets
+received, generated or forwarded by the kernel.
+.SH TODO
+Per-handle
+.B ipq_errno
+values.
+.SH BUGS
+Probably.
+.SH AUTHOR
+James Morris <jmorris@intercode.com.au>
+.SH COPYRIGHT
+Copyright (c) 2000-2001 Netfilter Core Team.
+.PP
+Distributed under the GNU General Public License.
+.SH CREDITS
+Joost Remijn implemented the
+.B ipq_read
+timeout feature, which appeared in the 1.2.4 release of iptables.
+.PP
+Fernando Anton added support for IPv6.
+.SH SEE ALSO
+.BR iptables (8),
+.BR ipq_create_handle (3),
+.BR ipq_destroy_handle (3),
+.BR ipq_errstr (3),
+.BR ipq_get_msgerr (3),
+.BR ipq_get_packet (3),
+.BR ipq_message_type (3),
+.BR ipq_perror (3),
+.BR ipq_read (3),
+.BR ipq_set_mode (3),
+.BR ipq_set_verdict (3).
+.PP
+The Netfilter home page at http://netfilter.samba.org/
+which has links to The Networking Concepts HOWTO, The Linux 2.4 Packet
+Filtering HOWTO, The Linux 2.4 NAT HOWTO, The Netfilter Hacking HOWTO,
+The Netfilter FAQ and many other useful resources.
+
diff --git a/ap/app/iptables/libipq/libipq.c b/ap/app/iptables/libipq/libipq.c
new file mode 100755
index 0000000..dbd8e5a
--- /dev/null
+++ b/ap/app/iptables/libipq/libipq.c
@@ -0,0 +1,381 @@
+/*
+ * libipq.c
+ *
+ * IPQ userspace library.
+ *
+ * Please note that this library is still developmental, and there may
+ * be some API changes.
+ *
+ * Author: James Morris <jmorris@intercode.com.au>
+ *
+ * 07-11-2001 Modified by Fernando Anton to add support for IPv6.
+ *
+ * Copyright (c) 2000-2001 Netfilter Core Team
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+#include <libipq/libipq.h>
+#include <netinet/in.h>
+#include <linux/types.h>
+#include <linux/netfilter.h>
+
+/****************************************************************************
+ *
+ * Private interface
+ *
+ ****************************************************************************/
+
+enum {
+ IPQ_ERR_NONE = 0,
+ IPQ_ERR_IMPL,
+ IPQ_ERR_HANDLE,
+ IPQ_ERR_SOCKET,
+ IPQ_ERR_BIND,
+ IPQ_ERR_BUFFER,
+ IPQ_ERR_RECV,
+ IPQ_ERR_NLEOF,
+ IPQ_ERR_ADDRLEN,
+ IPQ_ERR_STRUNC,
+ IPQ_ERR_RTRUNC,
+ IPQ_ERR_NLRECV,
+ IPQ_ERR_SEND,
+ IPQ_ERR_SUPP,
+ IPQ_ERR_RECVBUF,
+ IPQ_ERR_TIMEOUT,
+ IPQ_ERR_PROTOCOL
+};
+#define IPQ_MAXERR IPQ_ERR_PROTOCOL
+
+struct ipq_errmap_t {
+ int errcode;
+ char *message;
+} ipq_errmap[] = {
+ { IPQ_ERR_NONE, "Unknown error" },
+ { IPQ_ERR_IMPL, "Implementation error" },
+ { IPQ_ERR_HANDLE, "Unable to create netlink handle" },
+ { IPQ_ERR_SOCKET, "Unable to create netlink socket" },
+ { IPQ_ERR_BIND, "Unable to bind netlink socket" },
+ { IPQ_ERR_BUFFER, "Unable to allocate buffer" },
+ { IPQ_ERR_RECV, "Failed to receive netlink message" },
+ { IPQ_ERR_NLEOF, "Received EOF on netlink socket" },
+ { IPQ_ERR_ADDRLEN, "Invalid peer address length" },
+ { IPQ_ERR_STRUNC, "Sent message truncated" },
+ { IPQ_ERR_RTRUNC, "Received message truncated" },
+ { IPQ_ERR_NLRECV, "Received error from netlink" },
+ { IPQ_ERR_SEND, "Failed to send netlink message" },
+ { IPQ_ERR_SUPP, "Operation not supported" },
+ { IPQ_ERR_RECVBUF, "Receive buffer size invalid" },
+ { IPQ_ERR_TIMEOUT, "Timeout"},
+ { IPQ_ERR_PROTOCOL, "Invalid protocol specified" }
+};
+
+static int ipq_errno = IPQ_ERR_NONE;
+
+static ssize_t ipq_netlink_sendto(const struct ipq_handle *h,
+ const void *msg, size_t len);
+
+static ssize_t ipq_netlink_recvfrom(const struct ipq_handle *h,
+ unsigned char *buf, size_t len,
+ int timeout);
+
+static ssize_t ipq_netlink_sendmsg(const struct ipq_handle *h,
+ const struct msghdr *msg,
+ unsigned int flags);
+
+static char *ipq_strerror(int errcode);
+
+static ssize_t ipq_netlink_sendto(const struct ipq_handle *h,
+ const void *msg, size_t len)
+{
+ int status = sendto(h->fd, msg, len, 0,
+ (struct sockaddr *)&h->peer, sizeof(h->peer));
+ if (status < 0)
+ ipq_errno = IPQ_ERR_SEND;
+ return status;
+}
+
+static ssize_t ipq_netlink_sendmsg(const struct ipq_handle *h,
+ const struct msghdr *msg,
+ unsigned int flags)
+{
+ int status = sendmsg(h->fd, msg, flags);
+ if (status < 0)
+ ipq_errno = IPQ_ERR_SEND;
+ return status;
+}
+
+static ssize_t ipq_netlink_recvfrom(const struct ipq_handle *h,
+ unsigned char *buf, size_t len,
+ int timeout)
+{
+ unsigned int addrlen;
+ int status;
+ struct nlmsghdr *nlh;
+
+ if (len < sizeof(struct nlmsgerr)) {
+ ipq_errno = IPQ_ERR_RECVBUF;
+ return -1;
+ }
+ addrlen = sizeof(h->peer);
+
+ if (timeout != 0) {
+ int ret;
+ struct timeval tv;
+ fd_set read_fds;
+
+ if (timeout < 0) {
+ /* non-block non-timeout */
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ } else {
+ tv.tv_sec = timeout / 1000000;
+ tv.tv_usec = timeout % 1000000;
+ }
+
+ FD_ZERO(&read_fds);
+ FD_SET(h->fd, &read_fds);
+ ret = select(h->fd+1, &read_fds, NULL, NULL, &tv);
+ if (ret < 0) {
+ if (errno == EINTR) {
+ return 0;
+ } else {
+ ipq_errno = IPQ_ERR_RECV;
+ return -1;
+ }
+ }
+ if (!FD_ISSET(h->fd, &read_fds)) {
+ ipq_errno = IPQ_ERR_TIMEOUT;
+ return 0;
+ }
+ }
+ status = recvfrom(h->fd, buf, len, 0,
+ (struct sockaddr *)&h->peer, &addrlen);
+ if (status < 0) {
+ ipq_errno = IPQ_ERR_RECV;
+ return status;
+ }
+ if (addrlen != sizeof(h->peer)) {
+ ipq_errno = IPQ_ERR_RECV;
+ return -1;
+ }
+ if (h->peer.nl_pid != 0) {
+ ipq_errno = IPQ_ERR_RECV;
+ return -1;
+ }
+ if (status == 0) {
+ ipq_errno = IPQ_ERR_NLEOF;
+ return -1;
+ }
+ nlh = (struct nlmsghdr *)buf;
+ if (nlh->nlmsg_flags & MSG_TRUNC || nlh->nlmsg_len > status) {
+ ipq_errno = IPQ_ERR_RTRUNC;
+ return -1;
+ }
+ return status;
+}
+
+static char *ipq_strerror(int errcode)
+{
+ if (errcode < 0 || errcode > IPQ_MAXERR)
+ errcode = IPQ_ERR_IMPL;
+ return ipq_errmap[errcode].message;
+}
+
+/****************************************************************************
+ *
+ * Public interface
+ *
+ ****************************************************************************/
+
+/*
+ * Create and initialise an ipq handle.
+ */
+struct ipq_handle *ipq_create_handle(u_int32_t flags, u_int32_t protocol)
+{
+ int status;
+ struct ipq_handle *h;
+
+ h = (struct ipq_handle *)malloc(sizeof(struct ipq_handle));
+ if (h == NULL) {
+ ipq_errno = IPQ_ERR_HANDLE;
+ return NULL;
+ }
+
+ memset(h, 0, sizeof(struct ipq_handle));
+
+ if (protocol == NFPROTO_IPV4)
+ h->fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_FIREWALL);
+ else if (protocol == NFPROTO_IPV6)
+ h->fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_IP6_FW);
+ else {
+ ipq_errno = IPQ_ERR_PROTOCOL;
+ free(h);
+ return NULL;
+ }
+
+ if (h->fd == -1) {
+ ipq_errno = IPQ_ERR_SOCKET;
+ close(h->fd);
+ free(h);
+ return NULL;
+ }
+ memset(&h->local, 0, sizeof(struct sockaddr_nl));
+ h->local.nl_family = AF_NETLINK;
+ h->local.nl_pid = getpid();
+ h->local.nl_groups = 0;
+ status = bind(h->fd, (struct sockaddr *)&h->local, sizeof(h->local));
+ if (status == -1) {
+ ipq_errno = IPQ_ERR_BIND;
+ close(h->fd);
+ free(h);
+ return NULL;
+ }
+ memset(&h->peer, 0, sizeof(struct sockaddr_nl));
+ h->peer.nl_family = AF_NETLINK;
+ h->peer.nl_pid = 0;
+ h->peer.nl_groups = 0;
+ return h;
+}
+
+/*
+ * No error condition is checked here at this stage, but it may happen
+ * if/when reliable messaging is implemented.
+ */
+int ipq_destroy_handle(struct ipq_handle *h)
+{
+ if (h) {
+ close(h->fd);
+ free(h);
+ }
+ return 0;
+}
+
+int ipq_set_mode(const struct ipq_handle *h,
+ u_int8_t mode, size_t range)
+{
+ struct {
+ struct nlmsghdr nlh;
+ ipq_peer_msg_t pm;
+ } req;
+
+ memset(&req, 0, sizeof(req));
+ req.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(req));
+ req.nlh.nlmsg_flags = NLM_F_REQUEST;
+ req.nlh.nlmsg_type = IPQM_MODE;
+ req.nlh.nlmsg_pid = h->local.nl_pid;
+ req.pm.msg.mode.value = mode;
+ req.pm.msg.mode.range = range;
+ return ipq_netlink_sendto(h, (void *)&req, req.nlh.nlmsg_len);
+}
+
+/*
+ * timeout is in microseconds (1 second is 1000000 (1 million) microseconds)
+ *
+ */
+ssize_t ipq_read(const struct ipq_handle *h,
+ unsigned char *buf, size_t len, int timeout)
+{
+ return ipq_netlink_recvfrom(h, buf, len, timeout);
+}
+
+int ipq_message_type(const unsigned char *buf)
+{
+ return ((struct nlmsghdr*)buf)->nlmsg_type;
+}
+
+int ipq_get_msgerr(const unsigned char *buf)
+{
+ struct nlmsghdr *h = (struct nlmsghdr *)buf;
+ struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
+ return -err->error;
+}
+
+ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf)
+{
+ return NLMSG_DATA((struct nlmsghdr *)(buf));
+}
+
+int ipq_set_verdict(const struct ipq_handle *h,
+ ipq_id_t id,
+ unsigned int verdict,
+ size_t data_len,
+ unsigned char *buf)
+{
+ unsigned char nvecs;
+ size_t tlen;
+ struct nlmsghdr nlh;
+ ipq_peer_msg_t pm;
+ struct iovec iov[3];
+ struct msghdr msg;
+
+ memset(&nlh, 0, sizeof(nlh));
+ nlh.nlmsg_flags = NLM_F_REQUEST;
+ nlh.nlmsg_type = IPQM_VERDICT;
+ nlh.nlmsg_pid = h->local.nl_pid;
+ memset(&pm, 0, sizeof(pm));
+ pm.msg.verdict.value = verdict;
+ pm.msg.verdict.id = id;
+ pm.msg.verdict.data_len = data_len;
+ iov[0].iov_base = &nlh;
+ iov[0].iov_len = sizeof(nlh);
+ iov[1].iov_base = ±
+ iov[1].iov_len = sizeof(pm);
+ tlen = sizeof(nlh) + sizeof(pm);
+ nvecs = 2;
+ if (data_len && buf) {
+ iov[2].iov_base = buf;
+ iov[2].iov_len = data_len;
+ tlen += data_len;
+ nvecs++;
+ }
+ msg.msg_name = (void *)&h->peer;
+ msg.msg_namelen = sizeof(h->peer);
+ msg.msg_iov = iov;
+ msg.msg_iovlen = nvecs;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+ nlh.nlmsg_len = tlen;
+ return ipq_netlink_sendmsg(h, &msg, 0);
+}
+
+/* Not implemented yet */
+int ipq_ctl(const struct ipq_handle *h, int request, ...)
+{
+ return 1;
+}
+
+char *ipq_errstr(void)
+{
+ return ipq_strerror(ipq_errno);
+}
+
+void ipq_perror(const char *s)
+{
+ if (s)
+ fputs(s, stderr);
+ else
+ fputs("ERROR", stderr);
+ if (ipq_errno)
+ fprintf(stderr, ": %s", ipq_errstr());
+ if (errno)
+ fprintf(stderr, ": %s", strerror(errno));
+ fputc('\n', stderr);
+}