diff options
author | mlaier <mlaier@FreeBSD.org> | 2006-05-12 20:39:23 +0000 |
---|---|---|
committer | mlaier <mlaier@FreeBSD.org> | 2006-05-12 20:39:23 +0000 |
commit | 123e91766b9a892556b2436bc59b9c6c5d6d8529 (patch) | |
tree | f4f22df7c476b68df1c6800d1b6306e9e02fa898 | |
parent | feb912d35980d6573e945f8726a0a1df9128ec2b (diff) | |
download | FreeBSD-src-123e91766b9a892556b2436bc59b9c6c5d6d8529.zip FreeBSD-src-123e91766b9a892556b2436bc59b9c6c5d6d8529.tar.gz |
Remove ip6fw. Since ipfw has full functional IPv6 support now and - in
contrast to ip6fw - is properly lockes, it is time to retire ip6fw.
-rw-r--r-- | sbin/Makefile | 2 | ||||
-rw-r--r-- | sbin/ip6fw/Makefile | 7 | ||||
-rw-r--r-- | sbin/ip6fw/ip6fw.8 | 582 | ||||
-rw-r--r-- | sbin/ip6fw/ip6fw.c | 1453 | ||||
-rw-r--r-- | sbin/ip6fw/sample.sh | 28 | ||||
-rw-r--r-- | sys/conf/files | 1 | ||||
-rw-r--r-- | sys/conf/options | 4 | ||||
-rw-r--r-- | sys/modules/Makefile | 1 | ||||
-rw-r--r-- | sys/modules/ip6fw/Makefile | 17 | ||||
-rw-r--r-- | sys/net/net_osdep.h | 4 | ||||
-rw-r--r-- | sys/netinet/ip_fw2.c | 1 | ||||
-rw-r--r-- | sys/netinet6/ip6_forward.c | 17 | ||||
-rw-r--r-- | sys/netinet6/ip6_fw.c | 1318 | ||||
-rw-r--r-- | sys/netinet6/ip6_fw.h | 231 | ||||
-rw-r--r-- | sys/netinet6/ip6_input.c | 23 | ||||
-rw-r--r-- | sys/netinet6/ip6_output.c | 58 |
16 files changed, 2 insertions, 3745 deletions
diff --git a/sbin/Makefile b/sbin/Makefile index a2daff4..d96d29a 100644 --- a/sbin/Makefile +++ b/sbin/Makefile @@ -38,7 +38,6 @@ SUBDIR= adjkerntz \ gvinum \ ifconfig \ init \ - ${_ip6fw} \ ${_ipf} \ ipfw \ kldconfig \ @@ -112,7 +111,6 @@ _pflogd= pflogd .endif .if ${MK_INET6} != "no" -_ip6fw= ip6fw _ping6= ping6 .endif diff --git a/sbin/ip6fw/Makefile b/sbin/ip6fw/Makefile deleted file mode 100644 index 17f330d..0000000 --- a/sbin/ip6fw/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# $FreeBSD$ - -PROG= ip6fw -WARNS?= 2 -MAN= ip6fw.8 - -.include <bsd.prog.mk> diff --git a/sbin/ip6fw/ip6fw.8 b/sbin/ip6fw/ip6fw.8 deleted file mode 100644 index 9d296cf..0000000 --- a/sbin/ip6fw/ip6fw.8 +++ /dev/null @@ -1,582 +0,0 @@ -.\" -.\" $FreeBSD$ -.\" -.\" $KAME$ -.\" -.\" Copyright (C) 1998, 1999, 2000 and 2001 WIDE Project. -.\" All rights reserved. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. Neither the name of the project nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.Dd March 13, 2000 -.Dt IP6FW 8 -.Os -.Sh NAME -.Nm ip6fw -.Nd controlling utility for IPv6 firewall -.Sh SYNOPSIS -.Nm -.Op Fl nq -.Oo -.Fl p Ar preproc -.Oo Fl D -.Ar macro Ns Op = Ns Ar value -.Oc -.Op Fl U Ar macro -.Oc -.Ar pathname -.Nm -.Op Fl n -.Op Fl f | Fl q -flush -.Nm -.Op Fl nq -zero -.Op Ar number ... -.Nm -.Op Fl n -delete -.Ar number ... -.Nm -.Op Fl aftN -list -.Op Ar number ... -.Nm -.Op Fl ftN -show -.Op Ar number ... -.Nm -.Op Fl nq -add -.Op Ar number -.Ar action -.Op log -.Ar proto -from -.Ar src -to -.Ar dst -.Op via Ar name | ipv6no -.Op Ar options -.Sh DESCRIPTION -To ease configuration, rules can be put into a file which is -processed using -.Nm -as shown in the first synopsis line. -An absolute -.Ar pathname -must be used. -The file -will be read line by line and applied as arguments to the -.Nm -utility. -.Pp -Optionally, a preprocessor can be specified using -.Fl p Ar preproc -where -.Ar pathname -is to be piped through. -Useful preprocessors include -.Xr cpp 1 -and -.Xr m4 1 . -If -.Ar preproc -does not start with a slash -.Pq Ql / -as its first character, the usual -.Ev PATH -name search is performed. -Care should be taken with this in environments where not all -file systems are mounted (yet) by the time -.Nm -is being run (e.g.\& when they are mounted over NFS). -Once -.Fl p -has been specified, optional -.Fl D -and -.Fl U -specifications can follow and will be passed on to the preprocessor. -This allows for flexible configuration files (like conditionalizing -them on the local hostname) and the use of macros to centralize -frequently required arguments like IP addresses. -.Pp -The -.Nm -code works by going through the rule-list for each packet, -until a match is found. -All rules have two associated counters, a packet count and -a byte count. -These counters are updated when a packet matches the rule. -.Pp -The rules are ordered by a -.Dq line-number -from 1 to 65534 that is used -to order and delete rules. -Rules are tried in increasing order, and the -first rule that matches a packet applies. -Multiple rules may share the same number and apply in -the order in which they were added. -.Pp -If a rule is added without a number, it is numbered 100 higher -than the previous rule. -If the highest defined rule number is -greater than 65434, new rules are appended to the last rule. -.Pp -The delete operation deletes the first rule with number -.Ar number , -if any. -.Pp -The list command prints out the current rule set. -.Pp -The show command is equivalent to `ip6fw -a list'. -.Pp -The zero operation zeroes the counters associated with rule number -.Ar number . -.Pp -The flush operation removes all rules. -.Pp -Any command beginning with a -.Sq # , -or being all blank, is ignored. -.Pp -One rule is always present: -.Bd -literal -offset center -65535 deny all from any to any -.Ed -.Pp -This rule is the default policy, i.e., do not allow anything at all. -Your job in setting up rules is to modify this policy to match your -needs. -.Pp -The following options are available: -.Bl -tag -width flag -.It Fl a -While listing, show counter values. -See also -.Dq show -command. -.It Fl f -Do not ask for confirmation for commands that can cause problems if misused -(ie; flush). -.Ar Note , -if there is no tty associated with the process, this is implied. -.It Fl n -Only check syntax of the command strings, -without actually passing them into the kernel. -.It Fl q -While adding, zeroing or flushing, be quiet about actions (implies '-f'). -This is useful for adjusting rules by executing multiple ip6fw commands in a -script (e.g.\& sh /etc/rc.firewall), or by processing a file of many ip6fw rules, -across a remote login session. -If a flush is performed in normal -(verbose) mode, it prints a message. -Because all rules are flushed, the -message cannot be delivered to the login session, the login session is -closed and the remainder of the ruleset is not processed. -Access to the -console is required to recover. -.It Fl t -While listing, show last match timestamp. -.It Fl N -Try to resolve addresses and service names in output. -.El -.Pp -.Ar action : -.Bl -hang -offset flag -width 16n -.It Ar allow -Allow packets that match rule. -The search terminates. -Aliases are -.Ar pass , -.Ar permit , -and -.Ar accept . -.It Ar deny -Discard packets that match this rule. -The search terminates. -.Ar Drop -is an alias for -.Ar deny . -.It Ar reject -(Deprecated.) -Discard packets that match this rule, and try to send an ICMPv6 -host unreachable notice. -The search terminates. -.It Ar unreach code -Discard packets that match this rule, and try to send an ICMPv6 -unreachable notice with code -.Ar code , -where -.Ar code -is a number from zero to 255, or one of these aliases: -.Ar noroute , -.Ar admin , -.Ar notneighbor , -.Ar addr , -or -.Ar noport , -The search terminates. -.It Ar reset -TCP packets only. -Discard packets that match this rule, -and try to send a TCP reset (RST) notice. -The search terminates -.It Ar count -Update counters for all packets that match rule. -The search continues with the next rule. -.It Ar skipto number -Skip all subsequent rules numbered less than -.Ar number . -The search continues with the first rule numbered -.Ar number -or higher. -.El -.Pp -If the kernel was compiled with -.Dv IPV6FIREWALL_VERBOSE , -then when a packet matches a rule with the -.Dq log -keyword or a clear/resetlog is performed, a message will be logged to -.Xr syslogd 8 , -or, if that fails, to the console. -If the kernel was compiled with the -.Dv IPV6FIREWALL_VERBOSE_LIMIT -option, then logging will cease after the number of packets -specified by the option are received for that particular -chain entry. -When this limit is reached, the limit and rule number will be logged. -Logging may then be re-enabled by clearing -the packet counter for that entry. -.Pp -The -.Xr syslogd 8 -logging and the default log limit are adjustable dynamically through the -.Xr sysctl 8 -interface. -.Pp -.Ar proto : -.Bl -hang -offset flag -width 16n -.It Ar ipv6 -All packets match. -The alias -.Ar all -has the same effect. -.It Ar tcp -Only TCP packets match. -.It Ar udp -Only UDP packets match. -.It Ar ipv6-icmp -Only ICMPv6 packets match. -.It Ar <number|name> -Only packets for the specified protocol matches (see -.Pa /etc/protocols -for a complete list). -.El -.Pp -.Ar src -and -.Ar dst : -.Bl -hang -offset flag -.It Ar <address/prefixlen> -.Op Ar ports -.El -.Pp -The -.Em <address/prefixlen> -may be specified as: -.Bl -hang -offset flag -width 16n -.It Ar ipv6no -An ipv6number of the form -.Li fec0::1:2:3:4 . -.It Ar ipv6no/prefixlen -An ipv6number with a prefix length of the form -.Li fec0::1:2:3:4/112 . -.El -.Pp -The sense of the match can be inverted by preceding an address with the -.Dq not -modifier, causing all other addresses to be matched instead. -This -does not affect the selection of port numbers. -.Pp -With the TCP and UDP protocols, optional -.Em ports -may be specified as: -.Pp -.Bl -hang -offset flag -.It Ns {port|port-port} Ns Op ,port Ns Op ,... -.El -.Pp -Service names (from -.Pa /etc/services ) -may be used instead of numeric port values. -A range may only be specified as the first value, -and the length of the port list is limited to -.Dv IPV6_FW_MAX_PORTS -(as defined in -.In netinet6/ip6_fw.h ) -ports. -.Pp -Fragmented packets which have a non-zero offset (i.e., not the first -fragment) will never match a rule which has one or more port -specifications. -See the -.Ar frag -option for details on matching fragmented packets. -.Pp -Rules can apply to packets when they are incoming, or outgoing, or both. -The -.Ar in -keyword indicates the rule should only match incoming packets. -The -.Ar out -keyword indicates the rule should only match outgoing packets. -.Pp -To match packets going through a certain interface, specify -the interface using -.Ar via : -.Bl -hang -offset flag -width 16n -.It Ar via ifX -Packet must be going through interface -.Ar ifX . -.It Ar via if* -Packet must be going through interface -.Ar ifX , -where X is any unit number. -.It Ar via any -Packet must be going through -.Em some -interface. -.It Ar via ipv6no -Packet must be going through the interface having IPv6 address -.Ar ipv6no . -.El -.Pp -The -.Ar via -keyword causes the interface to always be checked. -If -.Ar recv -or -.Ar xmit -is used instead of -.Ar via , -then the only receive or transmit interface (respectively) is checked. -By specifying both, it is possible to match packets based on both receive -and transmit interface, e.g.: -.Pp -.Dl "ip6fw add 100 deny ip from any to any out recv ed0 xmit ed1" -.Pp -The -.Ar recv -interface can be tested on either incoming or outgoing packets, while the -.Ar xmit -interface can only be tested on outgoing packets. -So -.Ar out -is required (and -.Ar in -invalid) whenever -.Ar xmit -is used. -Specifying -.Ar via -together with -.Ar xmit -or -.Ar recv -is invalid. -.Pp -A packet may not have a receive or transmit interface: packets originating -from the local host have no receive interface, while packets destined for -the local host have no transmit interface. -.Pp -Additional -.Ar options : -.Bl -hang -offset flag -width 16n -.It frag -Matches if the packet is a fragment and this is not the first fragment -of the datagram. -.Ar frag -may not be used in conjunction with either -.Ar tcpflags -or TCP/UDP port specifications. -.It in -Matches if this packet was on the way in. -.It out -Matches if this packet was on the way out. -.It ipv6options Ar spec -Matches if the IPv6 header contains the comma separated list of -options specified in -.Ar spec . -The supported IPv6 options are: -.Ar hopopt -(hop-by-hop options header), -.Ar route -(routing header), -.Ar frag -(fragment header), -.Ar esp -(encapsulating security payload), -.Ar ah -(authentication header), -.Ar nonxt -(no next header), and -.Ar opts -(destination options header). -The absence of a particular option may be denoted -with a -.Dq \&! -.Em ( "not working yet" ) . -.It established -Matches packets that have the RST or ACK bits set. -TCP packets only. -.It setup -Matches packets that have the SYN bit set but no ACK bit. -TCP packets only. -.It tcpflags Ar spec -Matches if the TCP header contains the comma separated list of -flags specified in -.Ar spec . -The supported TCP flags are: -.Ar fin , -.Ar syn , -.Ar rst , -.Ar psh , -.Ar ack , -and -.Ar urg . -The absence of a particular flag may be denoted -with a -.Dq \&! . -A rule which contains a -.Ar tcpflags -specification can never match a fragmented packet which has -a non-zero offset. -See the -.Ar frag -option for details on matching fragmented packets. -.It icmptypes Ar types -Matches if the ICMPv6 type is in the list -.Ar types . -The list may be specified as any combination of ranges -or individual types separated by commas. -.El -.Sh CHECKLIST -Here are some important points to consider when designing your -rules: -.Bl -bullet -offset flag -.It -Remember that you filter both packets going in and out. -Most connections need packets going in both directions. -.It -Remember to test very carefully. -It is a good idea to be near the console when doing this. -.It -Do not forget the loopback interface. -.El -.Sh FINE POINTS -There is one kind of packet that the firewall will always discard, -that is an IPv6 fragment with a fragment offset of one. -This is a valid packet, but it only has one use, to try to circumvent -firewalls. -.Pp -If you are logged in over a network, loading the KLD version of -.Nm -is probably not as straightforward as you would think -.Em ( "not supported" ) . -I recommend this command line: -.Bd -literal -offset center -kldload ip6fw && \e -ip6fw add 32000 allow all from any to any -.Ed -.Pp -Along the same lines, doing an -.Bd -literal -offset center -ip6fw flush -.Ed -.Pp -in similar surroundings is also a bad idea. -.Sh PACKET DIVERSION -not supported. -.Sh EXAMPLES -This command adds an entry which denies all tcp packets from -.Em hacker.evil.org -to the telnet port of -.Em wolf.tambov.su -from being forwarded by the host: -.Pp -.Dl ip6fw add deny tcp from hacker.evil.org to wolf.tambov.su 23 -.Pp -This one disallows any connection from the entire hackers network to -my host: -.Pp -.Dl ip6fw add deny all from fec0::123:45:67:0/112 to my.host.org -.Pp -Here is a good usage of the list command to see accounting records -and timestamp information: -.Pp -.Dl ip6fw -at l -.Pp -or in short form without timestamps: -.Pp -.Dl ip6fw -a l -.Sh SEE ALSO -.Xr ip 4 , -.Xr ipfirewall 4 , -.Xr protocols 5 , -.Xr services 5 , -.Xr reboot 8 , -.Xr sysctl 8 , -.Xr syslogd 8 -.Sh HISTORY -A -.Nm -utility first appeared in -.Fx 4.0 . -.Sh AUTHORS -.An Ugen J. S. Antsilevich , -.An Poul-Henning Kamp , -.An Alex Nash , -.An Archie Cobbs . -.Pp -.An -nosplit -API based upon code written by -.An Daniel Boulet -for BSDI. -.Sh BUGS -.Em WARNING!!WARNING!!WARNING!!WARNING!!WARNING!!WARNING!!WARNING!! -.Pp -This program can put your computer in rather unusable state. -When -using it for the first time, work on the console of the computer, and -do -.Em NOT -do anything you do not understand. -.Pp -When manipulating/adding chain entries, service and protocol names are -not accepted. diff --git a/sbin/ip6fw/ip6fw.c b/sbin/ip6fw/ip6fw.c deleted file mode 100644 index 9ceabbf..0000000 --- a/sbin/ip6fw/ip6fw.c +++ /dev/null @@ -1,1453 +0,0 @@ -/* $KAME: ip6fw.c,v 1.14 2003/10/02 19:36:25 itojun Exp $ */ - -/* - * Copyright (C) 1998, 1999, 2000 and 2001 WIDE Project. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp - * Copyright (c) 1994 Ugen J.S.Antsilevich - * - * Idea and grammar partially left from: - * Copyright (c) 1993 Daniel Boulet - * - * Redistribution and use in source forms, with and without modification, - * are permitted provided that this entire comment appears intact. - * - * Redistribution in binary form may occur without any restrictions. - * Obviously, it would be nice if you gave credit where credit is due - * but requiring it would be too onerous. - * - * This software is provided ``AS IS'' without any warranties of any kind. - * - * NEW command line interface for IP firewall facility - * - * $Id: ip6fw.c,v 1.1.2.2.2.2 1999/05/14 05:13:50 shin Exp $ - * $FreeBSD$ - */ - -#include <sys/types.h> -#include <sys/queue.h> -#include <sys/socket.h> -#include <sys/sockio.h> -#include <sys/time.h> -#include <sys/ioctl.h> -#include <sys/wait.h> - -#include <ctype.h> -#include <err.h> -#include <limits.h> -#include <netdb.h> -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> -#include <string.h> -#include <time.h> -#include <timeconv.h> -#include <unistd.h> -#include <errno.h> -#include <signal.h> -#include <sysexits.h> - -#include <net/if.h> -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip6.h> -#include <netinet/icmp6.h> -#include <netinet6/ip6_fw.h> -#include <netinet/tcp.h> -#include <arpa/inet.h> - -int lineno = -1; - -int s; /* main RAW socket */ -int do_resolv=0; /* Would try to resolv all */ -int do_acct=0; /* Show packet/byte count */ -int do_time=0; /* Show time stamps */ -int do_quiet=0; /* Be quiet in add and flush */ -int do_force=0; /* Don't ask for confirmation */ -int do_test=0; /* Don't load into Kernel */ - -struct icmpcode { - int code; - char *str; -}; - -static struct icmpcode icmp6codes[] = { - { ICMP6_DST_UNREACH_NOROUTE, "noroute" }, - { ICMP6_DST_UNREACH_ADMIN, "admin" }, - { ICMP6_DST_UNREACH_NOTNEIGHBOR, "notneighbor" }, - { ICMP6_DST_UNREACH_ADDR, "addr" }, - { ICMP6_DST_UNREACH_NOPORT, "noport" }, - { 0, NULL } -}; - -static char ntop_buf[INET6_ADDRSTRLEN]; - -static void show_usage(const char *fmt, ...); - -static int -mask_bits(u_char *m_ad, int m_len) -{ - int h_num = 0,i; - - for (i = 0; i < m_len; i++, m_ad++) { - if (*m_ad != 0xff) - break; - h_num += 8; - } - if (i < m_len) { - switch (*m_ad) { -#define MASKLEN(m, l) case m: h_num += l; break - MASKLEN(0xfe, 7); - MASKLEN(0xfc, 6); - MASKLEN(0xf8, 5); - MASKLEN(0xf0, 4); - MASKLEN(0xe0, 3); - MASKLEN(0xc0, 2); - MASKLEN(0x80, 1); -#undef MASKLEN - } - } - return h_num; -} - -static int pl2m[9] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; - -struct in6_addr *plen2mask(int n) -{ - static struct in6_addr ia; - u_char *p; - int i; - - memset(&ia, 0, sizeof(struct in6_addr)); - p = (u_char *)&ia; - for (i = 0; i < 16; i++, p++, n -= 8) { - if (n >= 8) { - *p = 0xff; - continue; - } - *p = pl2m[n]; - break; - } - return &ia; -} - -void -print_port(prot, port, comma) - u_char prot; - u_short port; - const char *comma; -{ - struct servent *se; - struct protoent *pe; - const char *protocol; - int printed = 0; - - if (do_resolv) { - pe = getprotobynumber(prot); - if (pe) - protocol = pe->p_name; - else - protocol = NULL; - - se = getservbyport(htons(port), protocol); - if (se) { - printf("%s%s", comma, se->s_name); - printed = 1; - } - } - if (!printed) - printf("%s%d",comma,port); -} - -static void -print_iface(char *key, union ip6_fw_if *un, int byname) -{ - - if (byname) { - printf(" %s %s", key, un->fu_via_if.name); - } else if (!IN6_IS_ADDR_UNSPECIFIED(&un->fu_via_ip6)) { - printf(" %s %s", key, inet_ntop(AF_INET6,&un->fu_via_ip6,ntop_buf,sizeof(ntop_buf))); - } else - printf(" %s any", key); -} - -static void -print_reject_code(int code) -{ - struct icmpcode *ic; - - for (ic = icmp6codes; ic->str; ic++) - if (ic->code == code) { - printf("%s", ic->str); - return; - } - printf("%u", code); -} - -static void -show_ip6fw(struct ip6_fw *chain) -{ - char *comma; - struct hostent *he; - struct protoent *pe; - int i, mb; - int nsp = IPV6_FW_GETNSRCP(chain); - int ndp = IPV6_FW_GETNDSTP(chain); - - if (do_resolv) - setservent(1/*stayopen*/); - - printf("%05u ", chain->fw_number); - - if (do_acct) - printf("%10lu %10lu ",chain->fw_pcnt,chain->fw_bcnt); - - if (do_time) - { - if (chain->timestamp) - { - char timestr[30]; - time_t t = _long_to_time(chain->timestamp); - - strcpy(timestr, ctime(&t)); - *strchr(timestr, '\n') = '\0'; - printf("%s ", timestr); - } - else - printf(" "); - } - - switch (chain->fw_flg & IPV6_FW_F_COMMAND) - { - case IPV6_FW_F_ACCEPT: - printf("allow"); - break; - case IPV6_FW_F_DENY: - printf("deny"); - break; - case IPV6_FW_F_COUNT: - printf("count"); - break; - case IPV6_FW_F_DIVERT: - printf("divert %u", chain->fw_divert_port); - break; - case IPV6_FW_F_TEE: - printf("tee %u", chain->fw_divert_port); - break; - case IPV6_FW_F_SKIPTO: - printf("skipto %u", chain->fw_skipto_rule); - break; - case IPV6_FW_F_REJECT: - if (chain->fw_reject_code == IPV6_FW_REJECT_RST) - printf("reset"); - else { - printf("unreach "); - print_reject_code(chain->fw_reject_code); - } - break; - default: - errx(EX_OSERR, "impossible"); - } - - if (chain->fw_flg & IPV6_FW_F_PRN) - printf(" log"); - - pe = getprotobynumber(chain->fw_prot); - if (pe) - printf(" %s", pe->p_name); - else - printf(" %u", chain->fw_prot); - - printf(" from %s", chain->fw_flg & IPV6_FW_F_INVSRC ? "not " : ""); - - mb=mask_bits((u_char *)&chain->fw_smsk,sizeof(chain->fw_smsk)); - if (mb==128 && do_resolv) { - he=gethostbyaddr((char *)&(chain->fw_src),sizeof(chain->fw_src),AF_INET6); - if (he==NULL) { - printf(inet_ntop(AF_INET6,&chain->fw_src,ntop_buf,sizeof(ntop_buf))); - } else - printf("%s",he->h_name); - } else { - if (mb!=128) { - if (mb == 0) { - printf("any"); - } else { - printf(inet_ntop(AF_INET6,&chain->fw_src,ntop_buf,sizeof(ntop_buf))); - printf("/%d",mb); - } - } else - printf(inet_ntop(AF_INET6,&chain->fw_src,ntop_buf,sizeof(ntop_buf))); - } - - if (chain->fw_prot == IPPROTO_TCP || chain->fw_prot == IPPROTO_UDP) { - comma = " "; - for (i = 0; i < nsp; i++) { - print_port(chain->fw_prot, chain->fw_pts[i], comma); - if (i==0 && (chain->fw_flg & IPV6_FW_F_SRNG)) - comma = "-"; - else - comma = ","; - } - } - - printf(" to %s", chain->fw_flg & IPV6_FW_F_INVDST ? "not " : ""); - - mb=mask_bits((u_char *)&chain->fw_dmsk,sizeof(chain->fw_dmsk)); - if (mb==128 && do_resolv) { - he=gethostbyaddr((char *)&(chain->fw_dst),sizeof(chain->fw_dst),AF_INET6); - if (he==NULL) { - printf(inet_ntop(AF_INET6,&chain->fw_dst,ntop_buf,sizeof(ntop_buf))); - } else - printf("%s",he->h_name); - } else { - if (mb!=128) { - if (mb == 0) { - printf("any"); - } else { - printf(inet_ntop(AF_INET6,&chain->fw_dst,ntop_buf,sizeof(ntop_buf))); - printf("/%d",mb); - } - } else - printf(inet_ntop(AF_INET6,&chain->fw_dst,ntop_buf,sizeof(ntop_buf))); - } - - if (chain->fw_prot == IPPROTO_TCP || chain->fw_prot == IPPROTO_UDP) { - comma = " "; - for (i = 0; i < ndp; i++) { - print_port(chain->fw_prot, chain->fw_pts[nsp+i], comma); - if (i==0 && (chain->fw_flg & IPV6_FW_F_DRNG)) - comma = "-"; - else - comma = ","; - } - } - - /* Direction */ - if ((chain->fw_flg & IPV6_FW_F_IN) && !(chain->fw_flg & IPV6_FW_F_OUT)) - printf(" in"); - if (!(chain->fw_flg & IPV6_FW_F_IN) && (chain->fw_flg & IPV6_FW_F_OUT)) - printf(" out"); - - /* Handle hack for "via" backwards compatibility */ - if ((chain->fw_flg & IF6_FW_F_VIAHACK) == IF6_FW_F_VIAHACK) { - print_iface("via", - &chain->fw_in_if, chain->fw_flg & IPV6_FW_F_IIFNAME); - } else { - /* Receive interface specified */ - if (chain->fw_flg & IPV6_FW_F_IIFACE) - print_iface("recv", &chain->fw_in_if, - chain->fw_flg & IPV6_FW_F_IIFNAME); - /* Transmit interface specified */ - if (chain->fw_flg & IPV6_FW_F_OIFACE) - print_iface("xmit", &chain->fw_out_if, - chain->fw_flg & IPV6_FW_F_OIFNAME); - } - - if (chain->fw_flg & IPV6_FW_F_FRAG) - printf(" frag"); - - if (chain->fw_ip6opt || chain->fw_ip6nopt) { - int _opt_printed = 0; -#define PRINTOPT(x) {if (_opt_printed) printf(",");\ - printf(x); _opt_printed = 1;} - - printf(" ip6opt "); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_HOPOPT) PRINTOPT("hopopt"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_HOPOPT) PRINTOPT("!hopopt"); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_ROUTE) PRINTOPT("route"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_ROUTE) PRINTOPT("!route"); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_FRAG) PRINTOPT("frag"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_FRAG) PRINTOPT("!frag"); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_ESP) PRINTOPT("esp"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_ESP) PRINTOPT("!esp"); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_AH) PRINTOPT("ah"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_AH) PRINTOPT("!ah"); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_NONXT) PRINTOPT("nonxt"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_NONXT) PRINTOPT("!nonxt"); - if (chain->fw_ip6opt & IPV6_FW_IP6OPT_OPTS) PRINTOPT("opts"); - if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_OPTS) PRINTOPT("!opts"); - } - - if (chain->fw_ipflg & IPV6_FW_IF_TCPEST) - printf(" established"); - else if (chain->fw_tcpf == IPV6_FW_TCPF_SYN && - chain->fw_tcpnf == IPV6_FW_TCPF_ACK) - printf(" setup"); - else if (chain->fw_tcpf || chain->fw_tcpnf) { - int _flg_printed = 0; -#define PRINTFLG(x) {if (_flg_printed) printf(",");\ - printf(x); _flg_printed = 1;} - - printf(" tcpflg "); - if (chain->fw_tcpf & IPV6_FW_TCPF_FIN) PRINTFLG("fin"); - if (chain->fw_tcpnf & IPV6_FW_TCPF_FIN) PRINTFLG("!fin"); - if (chain->fw_tcpf & IPV6_FW_TCPF_SYN) PRINTFLG("syn"); - if (chain->fw_tcpnf & IPV6_FW_TCPF_SYN) PRINTFLG("!syn"); - if (chain->fw_tcpf & IPV6_FW_TCPF_RST) PRINTFLG("rst"); - if (chain->fw_tcpnf & IPV6_FW_TCPF_RST) PRINTFLG("!rst"); - if (chain->fw_tcpf & IPV6_FW_TCPF_PSH) PRINTFLG("psh"); - if (chain->fw_tcpnf & IPV6_FW_TCPF_PSH) PRINTFLG("!psh"); - if (chain->fw_tcpf & IPV6_FW_TCPF_ACK) PRINTFLG("ack"); - if (chain->fw_tcpnf & IPV6_FW_TCPF_ACK) PRINTFLG("!ack"); - if (chain->fw_tcpf & IPV6_FW_TCPF_URG) PRINTFLG("urg"); - if (chain->fw_tcpnf & IPV6_FW_TCPF_URG) PRINTFLG("!urg"); - } - if (chain->fw_flg & IPV6_FW_F_ICMPBIT) { - int type_index; - int first = 1; - - printf(" icmptype"); - - for (type_index = 0; type_index < IPV6_FW_ICMPTYPES_DIM * sizeof(unsigned) * 8; ++type_index) - if (chain->fw_icmp6types[type_index / (sizeof(unsigned) * 8)] & - (1U << (type_index % (sizeof(unsigned) * 8)))) { - printf("%c%d", first == 1 ? ' ' : ',', type_index); - first = 0; - } - } - printf("\n"); - if (do_resolv) - endservent(); -} - -void -list(ac, av) - int ac; - char **av; -{ - struct ip6_fw *r, *rules, *n; - int l,i; - unsigned long rulenum; - int nalloc, bytes, maxbytes; - - /* extract rules from kernel, resizing array as necessary */ - rules = NULL; - nalloc = sizeof *rules; - bytes = nalloc; - maxbytes = 65536 * sizeof *rules; - while (bytes >= nalloc) { - if ((n = realloc(rules, nalloc * 2 + 200)) == NULL) - err(EX_OSERR, "realloc"); - bytes = nalloc = nalloc * 2 + 200; - rules = n; - i = getsockopt(s, IPPROTO_IPV6, IPV6_FW_GET, rules, &bytes); - if ((i < 0 && errno != EINVAL) || nalloc > maxbytes) - err(EX_OSERR, "getsockopt(IPV6_FW_GET)"); - } - if (!ac) { - /* display all rules */ - for (r = rules, l = bytes; l >= sizeof rules[0]; - r++, l-=sizeof rules[0]) - show_ip6fw(r); - } - else { - /* display specific rules requested on command line */ - int exitval = 0; - - while (ac--) { - char *endptr; - int seen; - - /* convert command line rule # */ - rulenum = strtoul(*av++, &endptr, 10); - if (*endptr) { - exitval = 1; - warn("invalid rule number: %s", av[-1]); - continue; - } - seen = 0; - for (r = rules, l = bytes; - l >= sizeof rules[0] && r->fw_number <= rulenum; - r++, l-=sizeof rules[0]) - if (rulenum == r->fw_number) { - show_ip6fw(r); - seen = 1; - } - if (!seen) { - exitval = 1; - warnx("rule %lu does not exist", rulenum); - } - } - if (exitval != 0) - exit(exitval); - } -} - -static void -show_usage(const char *fmt, ...) -{ - if (fmt) { - char buf[100]; - va_list args; - - va_start(args, fmt); - vsnprintf(buf, sizeof(buf), fmt, args); - va_end(args); - warnx("error: %s", buf); - } - fprintf(stderr, "usage: ip6fw [options]\n" -" flush\n" -" add [number] rule\n" -" delete number ...\n" -" list [number ...]\n" -" show [number ...]\n" -" zero [number ...]\n" -" rule: action proto src dst extras...\n" -" action:\n" -" {allow|permit|accept|pass|deny|drop|reject|unreach code|\n" -" reset|count|skipto num} [log]\n" -" proto: {ipv6|tcp|udp|ipv6-icmp|<number>}\n" -" src: from [not] {any|ipv6[/prefixlen]} [{port|port-port},[port],...]\n" -" dst: to [not] {any|ipv6[/prefixlen]} [{port|port-port},[port],...]\n" -" extras:\n" -" fragment (may not be used with ports or tcpflags)\n" -" in\n" -" out\n" -" {xmit|recv|via} {iface|ipv6|any}\n" -" {established|setup}\n" -" tcpflags [!]{syn|fin|rst|ack|psh|urg},...\n" -" ipv6options [!]{hopopt|route|frag|esp|ah|nonxt|opts},...\n" -" icmptypes {type[,type]}...\n"); - - exit(1); -} - -static int -lookup_host (host, addr, family) - char *host; - u_char *addr; - int family; -{ - struct hostent *he; - - if (inet_pton(family, host, addr) != 1) { - if ((he = gethostbyname2(host, family)) == NULL) - return(-1); - memcpy(addr, he->h_addr_list[0], he->h_length); - } - return(0); -} - -void -fill_ip6(ipno, mask, acp, avp) - struct in6_addr *ipno, *mask; - int *acp; - char ***avp; -{ - int ac = *acp; - char **av = *avp; - char *p = 0, md = 0; - int i; - - if (ac && !strncmp(*av,"any",strlen(*av))) { - *ipno = *mask = in6addr_any; av++; ac--; - } else { - p = strchr(*av, '/'); - if (p) { - md = *p; - *p++ = '\0'; - } - - if (lookup_host(*av, (u_char *)ipno, AF_INET6) != 0) - show_usage("hostname ``%s'' unknown", *av); - switch (md) { - case '/': - if (atoi(p) == 0) { - *mask = in6addr_any; - } else if (atoi(p) > 128) { - show_usage("bad width ``%s''", p); - } else { - *mask = *(plen2mask(atoi(p))); - } - break; - default: - *mask = *(plen2mask(128)); - break; - } - for (i = 0; i < sizeof(*ipno); i++) - ipno->s6_addr[i] &= mask->s6_addr[i]; - av++; - ac--; - } - *acp = ac; - *avp = av; -} - -static void -fill_reject_code6(u_short *codep, char *str) -{ - struct icmpcode *ic; - u_long val; - char *s; - - val = strtoul(str, &s, 0); - if (s != str && *s == '\0' && val < 0x100) { - *codep = val; - return; - } - for (ic = icmp6codes; ic->str; ic++) - if (!strcasecmp(str, ic->str)) { - *codep = ic->code; - return; - } - show_usage("unknown ICMP6 unreachable code ``%s''", str); -} - -static void -add_port(cnt, ptr, off, port) - u_short *cnt, *ptr, off, port; -{ - if (off + *cnt >= IPV6_FW_MAX_PORTS) - errx(1, "too many ports (max is %d)", IPV6_FW_MAX_PORTS); - ptr[off+*cnt] = port; - (*cnt)++; -} - -static int -lookup_port(const char *arg, int test, int nodash) -{ - int val; - char *earg, buf[32]; - struct servent *s; - - snprintf(buf, sizeof(buf), "%s", arg); - buf[strcspn(arg, nodash ? "-," : ",")] = 0; - val = (int) strtoul(buf, &earg, 0); - if (!*buf || *earg) { - setservent(1); - if ((s = getservbyname(buf, NULL))) { - val = htons(s->s_port); - } else { - if (!test) { - errx(1, "unknown port ``%s''", arg); - } - val = -1; - } - } else { - if (val < 0 || val > 0xffff) { - if (!test) { - errx(1, "port ``%s'' out of range", arg); - } - val = -1; - } - } - return(val); -} - -int -fill_port(cnt, ptr, off, arg) - u_short *cnt, *ptr, off; - char *arg; -{ - char *s; - int initial_range = 0; - - s = arg + strcspn(arg, "-,"); /* first port name can't have a dash */ - if (*s == '-') { - *s++ = '\0'; - if (strchr(arg, ',')) - errx(1, "port range must be first in list"); - add_port(cnt, ptr, off, *arg ? lookup_port(arg, 0, 0) : 0x0000); - arg = s; - s = strchr(arg,','); - if (s) - *s++ = '\0'; - add_port(cnt, ptr, off, *arg ? lookup_port(arg, 0, 0) : 0xffff); - arg = s; - initial_range = 1; - } - while (arg != NULL) { - s = strchr(arg,','); - if (s) - *s++ = '\0'; - add_port(cnt, ptr, off, lookup_port(arg, 0, 0)); - arg = s; - } - return initial_range; -} - -void -fill_tcpflag(set, reset, vp) - u_char *set, *reset; - char **vp; -{ - char *p = *vp,*q; - u_char *d; - - while (p && *p) { - struct tpcflags { - char * name; - u_char value; - } flags[] = { - { "syn", IPV6_FW_TCPF_SYN }, - { "fin", IPV6_FW_TCPF_FIN }, - { "ack", IPV6_FW_TCPF_ACK }, - { "psh", IPV6_FW_TCPF_PSH }, - { "rst", IPV6_FW_TCPF_RST }, - { "urg", IPV6_FW_TCPF_URG } - }; - int i; - - if (*p == '!') { - p++; - d = reset; - } else { - d = set; - } - q = strchr(p, ','); - if (q) - *q++ = '\0'; - for (i = 0; i < sizeof(flags) / sizeof(flags[0]); ++i) - if (!strncmp(p, flags[i].name, strlen(p))) { - *d |= flags[i].value; - break; - } - if (i == sizeof(flags) / sizeof(flags[0])) - show_usage("invalid tcp flag ``%s''", p); - p = q; - } -} - -static void -fill_ip6opt(u_char *set, u_char *reset, char **vp) -{ - char *p = *vp,*q; - u_char *d; - - while (p && *p) { - if (*p == '!') { - p++; - d = reset; - } else { - d = set; - } - q = strchr(p, ','); - if (q) - *q++ = '\0'; - if (!strncmp(p,"hopopt",strlen(p))) *d |= IPV6_FW_IP6OPT_HOPOPT; - if (!strncmp(p,"route",strlen(p))) *d |= IPV6_FW_IP6OPT_ROUTE; - if (!strncmp(p,"frag",strlen(p))) *d |= IPV6_FW_IP6OPT_FRAG; - if (!strncmp(p,"esp",strlen(p))) *d |= IPV6_FW_IP6OPT_ESP; - if (!strncmp(p,"ah",strlen(p))) *d |= IPV6_FW_IP6OPT_AH; - if (!strncmp(p,"nonxt",strlen(p))) *d |= IPV6_FW_IP6OPT_NONXT; - if (!strncmp(p,"opts",strlen(p))) *d |= IPV6_FW_IP6OPT_OPTS; - p = q; - } -} - -void -fill_icmptypes(types, vp, fw_flg) - u_long *types; - char **vp; - u_short *fw_flg; -{ - char *c = *vp; - - while (*c) - { - unsigned long icmptype; - - if ( *c == ',' ) - ++c; - - icmptype = strtoul(c, &c, 0); - - if ( *c != ',' && *c != '\0' ) - show_usage("invalid ICMP6 type"); - - if (icmptype >= IPV6_FW_ICMPTYPES_DIM * sizeof(unsigned) * 8) - show_usage("ICMP6 type out of range"); - - types[icmptype / (sizeof(unsigned) * 8)] |= - 1 << (icmptype % (sizeof(unsigned) * 8)); - *fw_flg |= IPV6_FW_F_ICMPBIT; - } -} - -void -delete(ac,av) - int ac; - char **av; -{ - struct ip6_fw rule; - int i; - int exitval = 0; - - memset(&rule, 0, sizeof rule); - - av++; ac--; - - /* Rule number */ - while (ac && isdigit(**av)) { - rule.fw_number = atoi(*av); av++; ac--; - if (!do_test) { - i = setsockopt(s, IPPROTO_IPV6, IPV6_FW_DEL, &rule, sizeof rule); - if (i) { - exitval = 1; - warn("rule %u: setsockopt(%s)", rule.fw_number, "IPV6_FW_DEL"); - } - } - } - if (exitval != 0) - exit(exitval); -} - -static void -verify_interface(union ip6_fw_if *ifu) -{ - struct ifreq ifr; - - strlcpy(ifr.ifr_name, ifu->fu_via_if.name, sizeof(ifr.ifr_name)); - - if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) - warnx("warning: interface ``%s'' does not exist", ifr.ifr_name); -} - -static void -fill_iface(char *which, union ip6_fw_if *ifu, int *byname, int ac, char *arg) -{ - if (!ac) - show_usage("missing argument for ``%s''", which); - - /* Parse the interface or address */ - if (!strcmp(arg, "any")) { - ifu->fu_via_ip6 = in6addr_any; - *byname = 0; - } else if (!isdigit(*arg)) { - *byname = 1; - strlcpy(ifu->fu_via_if.name, arg, sizeof(ifu->fu_via_if.name)); - /* - * We assume that strings containing '*', '?', or '[' - * are ment to be shell pattern. - */ - if (strpbrk(arg, "*?[") != NULL) { - ifu->fu_via_if.glob = 1; - } else { - ifu->fu_via_if.glob = 0; - verify_interface(ifu); - } - } else if (inet_pton(AF_INET6, arg, &ifu->fu_via_ip6) != 1) { - show_usage("bad ip6 address ``%s''", arg); - } else - *byname = 0; -} - -static void -add(ac,av) - int ac; - char **av; -{ - struct ip6_fw rule; - int i; - u_char proto; - struct protoent *pe; - int saw_xmrc = 0, saw_via = 0; - - memset(&rule, 0, sizeof rule); - - av++; ac--; - - /* Rule number */ - if (ac && isdigit(**av)) { - rule.fw_number = atoi(*av); av++; ac--; - } - - /* Action */ - if (ac == 0) - show_usage("missing action"); - if (!strncmp(*av,"accept",strlen(*av)) - || !strncmp(*av,"pass",strlen(*av)) - || !strncmp(*av,"allow",strlen(*av)) - || !strncmp(*av,"permit",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_ACCEPT; av++; ac--; - } else if (!strncmp(*av,"count",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_COUNT; av++; ac--; - } -#if 0 - else if (!strncmp(*av,"divert",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_DIVERT; av++; ac--; - if (!ac) - show_usage("missing divert port"); - rule.fw_divert_port = strtoul(*av, NULL, 0); av++; ac--; - if (rule.fw_divert_port == 0) { - struct servent *s; - setservent(1); - s = getservbyname(av[-1], "divert"); - if (s != NULL) - rule.fw_divert_port = ntohs(s->s_port); - else - show_usage("illegal divert port"); - } - } else if (!strncmp(*av,"tee",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_TEE; av++; ac--; - if (!ac) - show_usage("missing divert port"); - rule.fw_divert_port = strtoul(*av, NULL, 0); av++; ac--; - if (rule.fw_divert_port == 0) { - struct servent *s; - setservent(1); - s = getservbyname(av[-1], "divert"); - if (s != NULL) - rule.fw_divert_port = ntohs(s->s_port); - else - show_usage("illegal divert port"); - } - } -#endif - else if (!strncmp(*av,"skipto",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_SKIPTO; av++; ac--; - if (!ac) - show_usage("missing skipto rule number"); - rule.fw_skipto_rule = strtoul(*av, NULL, 0); av++; ac--; - } else if ((!strncmp(*av,"deny",strlen(*av)) - || !strncmp(*av,"drop",strlen(*av)))) { - rule.fw_flg |= IPV6_FW_F_DENY; av++; ac--; - } else if (!strncmp(*av,"reject",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_REJECT; av++; ac--; - rule.fw_reject_code = ICMP6_DST_UNREACH_NOROUTE; - } else if (!strncmp(*av,"reset",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_REJECT; av++; ac--; - rule.fw_reject_code = IPV6_FW_REJECT_RST; /* check TCP later */ - } else if (!strncmp(*av,"unreach",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_REJECT; av++; ac--; - fill_reject_code6(&rule.fw_reject_code, *av); av++; ac--; - } else { - show_usage("invalid action ``%s''", *av); - } - - /* [log] */ - if (ac && !strncmp(*av,"log",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_PRN; av++; ac--; - } - - /* protocol */ - if (ac == 0) - show_usage("missing protocol"); - if ((proto = atoi(*av)) > 0) { - rule.fw_prot = proto; av++; ac--; - } else if (!strncmp(*av,"all",strlen(*av))) { - rule.fw_prot = IPPROTO_IPV6; av++; ac--; - } else if ((pe = getprotobyname(*av)) != NULL) { - rule.fw_prot = pe->p_proto; av++; ac--; - } else { - show_usage("invalid protocol ``%s''", *av); - } - - if (rule.fw_prot != IPPROTO_TCP - && (rule.fw_flg & IPV6_FW_F_COMMAND) == IPV6_FW_F_REJECT - && rule.fw_reject_code == IPV6_FW_REJECT_RST) - show_usage("``reset'' is only valid for tcp packets"); - - /* from */ - if (ac && !strncmp(*av,"from",strlen(*av))) { av++; ac--; } - else - show_usage("missing ``from''"); - - if (ac && !strncmp(*av,"not",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_INVSRC; - av++; ac--; - } - if (!ac) - show_usage("missing arguments"); - - fill_ip6(&rule.fw_src, &rule.fw_smsk, &ac, &av); - - if (ac && (isdigit(**av) || lookup_port(*av, 1, 1) >= 0)) { - u_short nports = 0; - - if (fill_port(&nports, rule.fw_pts, 0, *av)) - rule.fw_flg |= IPV6_FW_F_SRNG; - IPV6_FW_SETNSRCP(&rule, nports); - av++; ac--; - } - - /* to */ - if (ac && !strncmp(*av,"to",strlen(*av))) { av++; ac--; } - else - show_usage("missing ``to''"); - - if (ac && !strncmp(*av,"not",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_INVDST; - av++; ac--; - } - if (!ac) - show_usage("missing arguments"); - - fill_ip6(&rule.fw_dst, &rule.fw_dmsk, &ac, &av); - - if (ac && (isdigit(**av) || lookup_port(*av, 1, 1) >= 0)) { - u_short nports = 0; - - if (fill_port(&nports, - rule.fw_pts, IPV6_FW_GETNSRCP(&rule), *av)) - rule.fw_flg |= IPV6_FW_F_DRNG; - IPV6_FW_SETNDSTP(&rule, nports); - av++; ac--; - } - - if ((rule.fw_prot != IPPROTO_TCP) && (rule.fw_prot != IPPROTO_UDP) - && (IPV6_FW_GETNSRCP(&rule) || IPV6_FW_GETNDSTP(&rule))) { - show_usage("only TCP and UDP protocols are valid" - " with port specifications"); - } - - while (ac) { - if (!strncmp(*av,"in",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_IN; - av++; ac--; continue; - } - if (!strncmp(*av,"out",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_OUT; - av++; ac--; continue; - } - if (ac && !strncmp(*av,"xmit",strlen(*av))) { - union ip6_fw_if ifu; - int byname; - - if (saw_via) { -badviacombo: - show_usage("``via'' is incompatible" - " with ``xmit'' and ``recv''"); - } - saw_xmrc = 1; - av++; ac--; - fill_iface("xmit", &ifu, &byname, ac, *av); - rule.fw_out_if = ifu; - rule.fw_flg |= IPV6_FW_F_OIFACE; - if (byname) - rule.fw_flg |= IPV6_FW_F_OIFNAME; - av++; ac--; continue; - } - if (ac && !strncmp(*av,"recv",strlen(*av))) { - union ip6_fw_if ifu; - int byname; - - if (saw_via) - goto badviacombo; - saw_xmrc = 1; - av++; ac--; - fill_iface("recv", &ifu, &byname, ac, *av); - rule.fw_in_if = ifu; - rule.fw_flg |= IPV6_FW_F_IIFACE; - if (byname) - rule.fw_flg |= IPV6_FW_F_IIFNAME; - av++; ac--; continue; - } - if (ac && !strncmp(*av,"via",strlen(*av))) { - union ip6_fw_if ifu; - int byname = 0; - - if (saw_xmrc) - goto badviacombo; - saw_via = 1; - av++; ac--; - fill_iface("via", &ifu, &byname, ac, *av); - rule.fw_out_if = rule.fw_in_if = ifu; - if (byname) - rule.fw_flg |= - (IPV6_FW_F_IIFNAME | IPV6_FW_F_OIFNAME); - av++; ac--; continue; - } - if (!strncmp(*av,"fragment",strlen(*av))) { - rule.fw_flg |= IPV6_FW_F_FRAG; - av++; ac--; continue; - } - if (!strncmp(*av,"ipv6options",strlen(*av))) { - av++; ac--; - if (!ac) - show_usage("missing argument" - " for ``ipv6options''"); - fill_ip6opt(&rule.fw_ip6opt, &rule.fw_ip6nopt, av); - av++; ac--; continue; - } - if (rule.fw_prot == IPPROTO_TCP) { - if (!strncmp(*av,"established",strlen(*av))) { - rule.fw_ipflg |= IPV6_FW_IF_TCPEST; - av++; ac--; continue; - } - if (!strncmp(*av,"setup",strlen(*av))) { - rule.fw_tcpf |= IPV6_FW_TCPF_SYN; - rule.fw_tcpnf |= IPV6_FW_TCPF_ACK; - av++; ac--; continue; - } - if (!strncmp(*av,"tcpflags",strlen(*av))) { - av++; ac--; - if (!ac) - show_usage("missing argument" - " for ``tcpflags''"); - fill_tcpflag(&rule.fw_tcpf, &rule.fw_tcpnf, av); - av++; ac--; continue; - } - } - if (rule.fw_prot == IPPROTO_ICMPV6) { - if (!strncmp(*av,"icmptypes",strlen(*av))) { - av++; ac--; - if (!ac) - show_usage("missing argument" - " for ``icmptypes''"); - fill_icmptypes(rule.fw_icmp6types, - av, &rule.fw_flg); - av++; ac--; continue; - } - } - show_usage("unknown argument ``%s''", *av); - } - - /* No direction specified -> do both directions */ - if (!(rule.fw_flg & (IPV6_FW_F_OUT|IPV6_FW_F_IN))) - rule.fw_flg |= (IPV6_FW_F_OUT|IPV6_FW_F_IN); - - /* Sanity check interface check, but handle "via" case separately */ - if (saw_via) { - if (rule.fw_flg & IPV6_FW_F_IN) - rule.fw_flg |= IPV6_FW_F_IIFACE; - if (rule.fw_flg & IPV6_FW_F_OUT) - rule.fw_flg |= IPV6_FW_F_OIFACE; - } else if ((rule.fw_flg & IPV6_FW_F_OIFACE) && (rule.fw_flg & IPV6_FW_F_IN)) - show_usage("can't check xmit interface of incoming packets"); - - /* frag may not be used in conjunction with ports or TCP flags */ - if (rule.fw_flg & IPV6_FW_F_FRAG) { - if (rule.fw_tcpf || rule.fw_tcpnf) - show_usage("can't mix 'frag' and tcpflags"); - - if (rule.fw_nports) - show_usage("can't mix 'frag' and port specifications"); - } - - if (!do_quiet) - show_ip6fw(&rule); - if (!do_test) { - i = setsockopt(s, IPPROTO_IPV6, IPV6_FW_ADD, &rule, sizeof rule); - if (i) - err(EX_UNAVAILABLE, "setsockopt(%s)", "IPV6_FW_ADD"); - } -} - -static void -zero (ac, av) - int ac; - char **av; -{ - av++; ac--; - - if (!ac) { - /* clear all entries */ - if (!do_test) { - if (setsockopt(s,IPPROTO_IPV6,IPV6_FW_ZERO,NULL,0)<0) - err(EX_UNAVAILABLE, "setsockopt(%s)", "IPV6_FW_ZERO"); - if (!do_quiet) - printf("Accounting cleared.\n"); - } else if (!do_quiet) - printf("Accounting not cleared.\n"); - } else { - struct ip6_fw rule; - int failed = 0; - - memset(&rule, 0, sizeof rule); - while (ac) { - /* Rule number */ - if (isdigit(**av)) { - rule.fw_number = atoi(*av); av++; ac--; - if (!do_test) { - if (setsockopt(s, IPPROTO_IPV6, - IPV6_FW_ZERO, &rule, sizeof rule)) { - warn("rule %u: setsockopt(%s)", rule.fw_number,"IPV6_FW_ZERO"); - failed = 1; - } - if (!do_quiet) - printf("Entry %d cleared\n", - rule.fw_number); - } - else if (!do_quiet) - printf("Entry %d not cleared\n", - rule.fw_number); - } else - show_usage("invalid rule number ``%s''", *av); - } - if (failed != 0) - exit(failed); - } -} - -int -ip6fw_main(ac,av) - int ac; - char **av; -{ - int ch; - - /* init optind to 1 */ - optind = 1; - - if ( ac == 1 ) { - show_usage(NULL); - } - - /* Set the force flag for non-interactive processes */ - do_force = !isatty(STDIN_FILENO); - - while ((ch = getopt(ac, av ,"afnqtN")) != -1) - switch(ch) { - case 'a': - do_acct=1; - break; - case 'f': - do_force=1; - break; - case 'n': - do_test=1; - break; - case 'q': - do_quiet=1; - break; - case 't': - do_time=1; - break; - case 'N': - do_resolv=1; - break; - default: - show_usage(NULL); - } - - ac -= optind; - if (*(av+=optind)==NULL) { - show_usage("Bad arguments"); - } - - if (!strncmp(*av, "add", strlen(*av))) { - add(ac,av); - } else if (!strncmp(*av, "delete", strlen(*av))) { - delete(ac,av); - } else if (!strncmp(*av, "flush", strlen(*av))) { - int do_flush = 0; - - if ( do_force || do_quiet ) - do_flush = 1; - else { - int c; - - /* Ask the user */ - printf("Are you sure? [yn] "); - do { - fflush(stdout); - c = toupper(getc(stdin)); - while (c != '\n' && getc(stdin) != '\n') - if (feof(stdin)) - return (0); - } while (c != 'Y' && c != 'N'); - printf("\n"); - if (c == 'Y') - do_flush = 1; - } - if ( do_flush ) { - if (!do_test) { - if (setsockopt(s,IPPROTO_IPV6,IPV6_FW_FLUSH,NULL,0) < 0) - err(EX_UNAVAILABLE, "setsockopt(%s)", "IPV6_FW_FLUSH"); - - if (!do_quiet) - printf("Flushed all rules.\n"); - } else if (!do_quiet) - printf("Rules not flushed.\n"); - } - } else if (!strncmp(*av, "zero", strlen(*av))) { - zero(ac,av); - } else if (!strncmp(*av, "print", strlen(*av))) { - list(--ac,++av); - } else if (!strncmp(*av, "list", strlen(*av))) { - list(--ac,++av); - } else if (!strncmp(*av, "show", strlen(*av))) { - do_acct++; - list(--ac,++av); - } else { - show_usage("Bad arguments"); - } - return 0; -} - -int -main(ac, av) - int ac; - char **av; -{ -#define MAX_ARGS 32 -#define WHITESP " \t\f\v\n\r" - char buf[BUFSIZ]; - char *a, *p, *args[MAX_ARGS], *cmd = NULL; - char linename[10]; - int i, c, lineno, nflag, qflag, pflag, status; - FILE *f = NULL; - pid_t preproc = 0; - - s = socket( AF_INET6, SOCK_RAW, IPPROTO_RAW ); - if ( s < 0 ) - err(EX_UNAVAILABLE, "socket"); - - setbuf(stdout,0); - - /* - * Only interpret the last command line argument as a file to - * be preprocessed if it is specified as an absolute pathname. - */ - - if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) { - nflag = qflag = pflag = i = 0; - lineno = 0; - - while ((c = getopt(ac, av, "D:U:np:q")) != -1) - switch(c) { - case 'D': - if (!pflag) - errx(EX_USAGE, "-D requires -p"); - if (i > MAX_ARGS - 2) - errx(EX_USAGE, - "too many -D or -U options"); - args[i++] = "-D"; - args[i++] = optarg; - break; - - case 'U': - if (!pflag) - errx(EX_USAGE, "-U requires -p"); - if (i > MAX_ARGS - 2) - errx(EX_USAGE, - "too many -D or -U options"); - args[i++] = "-U"; - args[i++] = optarg; - break; - - case 'n': - nflag = 1; - break; - - case 'p': - pflag = 1; - cmd = optarg; - args[0] = cmd; - i = 1; - break; - - case 'q': - qflag = 1; - break; - - default: - show_usage(NULL); - } - - av += optind; - ac -= optind; - if (ac != 1) - show_usage("extraneous filename arguments"); - - if ((f = fopen(av[0], "r")) == NULL) - err(EX_UNAVAILABLE, "fopen: %s", av[0]); - - if (pflag) { - /* pipe through preprocessor (cpp or m4) */ - int pipedes[2]; - - args[i] = 0; - - if (pipe(pipedes) == -1) - err(EX_OSERR, "cannot create pipe"); - - switch((preproc = fork())) { - case -1: - err(EX_OSERR, "cannot fork"); - - case 0: - /* child */ - if (dup2(fileno(f), 0) == -1 || - dup2(pipedes[1], 1) == -1) - err(EX_OSERR, "dup2()"); - fclose(f); - close(pipedes[1]); - close(pipedes[0]); - execvp(cmd, args); - err(EX_OSERR, "execvp(%s) failed", cmd); - - default: - /* parent */ - fclose(f); - close(pipedes[1]); - if ((f = fdopen(pipedes[0], "r")) == NULL) { - int savederrno = errno; - - (void)kill(preproc, SIGTERM); - errno = savederrno; - err(EX_OSERR, "fdopen()"); - } - } - } - - while (fgets(buf, BUFSIZ, f)) { - lineno++; - sprintf(linename, "Line %d", lineno); - args[0] = linename; - - if (*buf == '#') - continue; - if ((p = strchr(buf, '#')) != NULL) - *p = '\0'; - i=1; - if (qflag) args[i++]="-q"; - if (nflag) args[i++]="-n"; - for (a = strtok(buf, WHITESP); - a && i < MAX_ARGS; a = strtok(NULL, WHITESP), i++) - args[i] = a; - if (i == (qflag? 2: 1)) - continue; - if (i == MAX_ARGS) - errx(EX_USAGE, "%s: too many arguments", linename); - args[i] = NULL; - - ip6fw_main(i, args); - } - fclose(f); - if (pflag) { - if (waitpid(preproc, &status, 0) != -1) { - if (WIFEXITED(status)) { - if (WEXITSTATUS(status) != EX_OK) - errx(EX_UNAVAILABLE, - "preprocessor exited with status %d", - WEXITSTATUS(status)); - } else if (WIFSIGNALED(status)) { - errx(EX_UNAVAILABLE, - "preprocessor exited with signal %d", - WTERMSIG(status)); - } - } - } - } else - ip6fw_main(ac,av); - return 0; -} diff --git a/sbin/ip6fw/sample.sh b/sbin/ip6fw/sample.sh deleted file mode 100644 index 0064140..0000000 --- a/sbin/ip6fw/sample.sh +++ /dev/null @@ -1,28 +0,0 @@ -#!/bin/sh - -# $FreeBSD$ - -fwcmd=/sbin/ip6fw - -$fwcmd -f flush - -# -# loopback -# -$fwcmd add 1000 pass all from any to any via lo0 - -# -# ND -# -# DAD -$fwcmd add 2000 pass ipv6-icmp from ff02::/16 to :: -$fwcmd add 2100 pass ipv6-icmp from :: to ff02::/16 -# RS, RA, NS, NA, redirect... -$fwcmd add 2300 pass ipv6-icmp from fe80::/10 to fe80::/10 -$fwcmd add 2400 pass ipv6-icmp from fe80::/10 to ff02::/16 - -$fwcmd add 5000 pass tcp from any to any established - -# RIPng -$fwcmd add 6000 pass udp from fe80::/10 521 to ff02::9 521 - -$fwcmd add 65000 pass log all from any to any diff --git a/sys/conf/files b/sys/conf/files index 3973696..818f7c6 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -1726,7 +1726,6 @@ netinet6/in6_proto.c optional inet6 netinet6/in6_rmx.c optional inet6 netinet6/in6_src.c optional inet6 netinet6/ip6_forward.c optional inet6 -netinet6/ip6_fw.c optional inet6 ipv6firewall netinet6/ip6_id.c optional inet6 netinet6/ip6_input.c optional inet6 netinet6/ip6_mroute.c optional inet6 diff --git a/sys/conf/options b/sys/conf/options index a30da2c..76e8d3a 100644 --- a/sys/conf/options +++ b/sys/conf/options @@ -366,10 +366,6 @@ IPFIREWALL_VERBOSE_LIMIT opt_ipfw.h IPFIREWALL_DEFAULT_TO_ACCEPT opt_ipfw.h IPFIREWALL_FORWARD opt_ipfw.h IPFIREWALL_FORWARD_EXTENDED opt_ipfw.h -IPV6FIREWALL opt_ip6fw.h -IPV6FIREWALL_VERBOSE opt_ip6fw.h -IPV6FIREWALL_VERBOSE_LIMIT opt_ip6fw.h -IPV6FIREWALL_DEFAULT_TO_ACCEPT opt_ip6fw.h IPSTEALTH IPX IPXIP opt_ipx.h diff --git a/sys/modules/Makefile b/sys/modules/Makefile index d039e01..c5fef74 100644 --- a/sys/modules/Makefile +++ b/sys/modules/Makefile @@ -113,7 +113,6 @@ SUBDIR= ${_3dfx} \ if_vlan \ ${_iir} \ ${_io} \ - ip6fw \ ipdivert \ ${_ipfilter} \ ipfw \ diff --git a/sys/modules/ip6fw/Makefile b/sys/modules/ip6fw/Makefile deleted file mode 100644 index 42ca025..0000000 --- a/sys/modules/ip6fw/Makefile +++ /dev/null @@ -1,17 +0,0 @@ -# $FreeBSD$ - -.PATH: ${.CURDIR}/../../netinet6 - -KMOD= ip6fw -SRCS= ip6_fw.c - -CFLAGS+= -DIPV6FIREWALL - -#If you want it verbose -#CFLAGS+= -DIPV6FIREWALL_VERBOSE -#CFLAGS+= -DIPV6FIREWALL_VERBOSE_LIMIT=100 -# -#If you want it to pass all packets by default -#CFLAGS+= -DIPV6FIREWALL_DEFAULT_TO_ACCEPT - -.include <bsd.kmod.mk> diff --git a/sys/net/net_osdep.h b/sys/net/net_osdep.h index 874eeb7..e5eed34 100644 --- a/sys/net/net_osdep.h +++ b/sys/net/net_osdep.h @@ -246,8 +246,8 @@ * listen/accept (like tcp). * * - header files with defopt (opt_xx.h) - * FreeBSD3: opt_{inet,ipsec,ip6fw,altq}.h - * FreeBSD4: opt_{inet,inet6,ipsec,ip6fw,altq}.h + * FreeBSD3: opt_{inet,ipsec,altq}.h + * FreeBSD4: opt_{inet,inet6,ipsec,altq}.h * NetBSD: opt_{inet,ipsec,altq}.h * others: does not use defopt * diff --git a/sys/netinet/ip_fw2.c b/sys/netinet/ip_fw2.c index dacaa57..980d52f 100644 --- a/sys/netinet/ip_fw2.c +++ b/sys/netinet/ip_fw2.c @@ -34,7 +34,6 @@ #if !defined(KLD_MODULE) #include "opt_ipfw.h" -#include "opt_ip6fw.h" #include "opt_ipdn.h" #include "opt_inet.h" #ifndef INET diff --git a/sys/netinet6/ip6_forward.c b/sys/netinet6/ip6_forward.c index 18f0312..3c7d354 100644 --- a/sys/netinet6/ip6_forward.c +++ b/sys/netinet6/ip6_forward.c @@ -30,7 +30,6 @@ * SUCH DAMAGE. */ -#include "opt_ip6fw.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" @@ -81,8 +80,6 @@ #define IPSEC #endif /* FAST_IPSEC */ -#include <netinet6/ip6_fw.h> - #include <net/net_osdep.h> #include <netinet6/ip6protosw.h> @@ -555,20 +552,6 @@ ip6_forward(m, srcrt) } /* - * Check with the firewall... - */ - if (ip6_fw_enable && ip6_fw_chk_ptr) { - u_short port = 0; - /* If ipfw says divert, we have to just drop packet */ - if ((*ip6_fw_chk_ptr)(&ip6, rt->rt_ifp, &port, &m)) { - m_freem(m); - goto freecopy; - } - if (!m) - goto freecopy; - } - - /* * Fake scoped addresses. Note that even link-local source or * destinaion can appear, if the originating node just sends the * packet to us (without address resolution for the destination). diff --git a/sys/netinet6/ip6_fw.c b/sys/netinet6/ip6_fw.c deleted file mode 100644 index 6927b60..0000000 --- a/sys/netinet6/ip6_fw.c +++ /dev/null @@ -1,1318 +0,0 @@ -/* $FreeBSD$ */ -/* $KAME: ip6_fw.c,v 1.21 2001/01/24 01:25:32 itojun Exp $ */ - -/*- - * Copyright (C) 1998, 1999, 2000 and 2001 WIDE Project. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/*- - * Copyright (c) 1993 Daniel Boulet - * Copyright (c) 1994 Ugen J.S.Antsilevich - * Copyright (c) 1996 Alex Nash - * - * Redistribution and use in source forms, with and without modification, - * are permitted provided that this entire comment appears intact. - * - * Redistribution in binary form may occur without any restrictions. - * Obviously, it would be nice if you gave credit where credit is due - * but requiring it would be too onerous. - * - * This software is provided ``AS IS'' without any warranties of any kind. - */ - -/* - * Implement IPv6 packet firewall - */ - -#if !defined(KLD_MODULE) -#include "opt_ip6fw.h" -#include "opt_inet.h" -#include "opt_inet6.h" -#endif - -#ifdef IP6DIVERT -#error "NOT SUPPORTED IPV6 DIVERT" -#endif -#ifdef IP6FW_DIVERT_RESTART -#error "NOT SUPPORTED IPV6 DIVERT" -#endif - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/queue.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/syslog.h> -#include <sys/time.h> -#include <net/if.h> -#include <net/route.h> -#include <netinet/in_systm.h> -#include <netinet/in.h> -#include <netinet/ip.h> - -#include <netinet/ip6.h> -#include <netinet6/ip6_var.h> -#include <netinet6/in6_var.h> -#include <netinet/icmp6.h> - -#include <netinet/in_pcb.h> - -#include <netinet6/ip6_fw.h> -#include <netinet/ip_var.h> -#include <netinet/tcp.h> -#include <netinet/tcp_seq.h> -#include <netinet/tcp_timer.h> -#include <netinet/tcp_var.h> -#include <netinet/udp.h> - -#include <sys/sysctl.h> - -#include <net/net_osdep.h> - -MALLOC_DEFINE(M_IP6FW, "Ip6Fw/Ip6Acct", "Ip6Fw/Ip6Acct chain's"); - -static int fw6_debug = 1; -#ifdef IPV6FIREWALL_VERBOSE -static int fw6_verbose = 1; -#else -static int fw6_verbose = 0; -#endif -#ifdef IPV6FIREWALL_VERBOSE_LIMIT -static int fw6_verbose_limit = IPV6FIREWALL_VERBOSE_LIMIT; -#else -static int fw6_verbose_limit = 0; -#endif - -static LIST_HEAD (ip6_fw_head, ip6_fw_chain) ip6_fw_chain; - -SYSCTL_DECL(_net_inet6_ip6); -static struct sysctl_ctx_list ip6_fw_sysctl_ctx; -static struct sysctl_oid *ip6_fw_sysctl_tree; - -#define dprintf(a) do { \ - if (fw6_debug) \ - printf a; \ - } while (/*CONSTCOND*/ 0) -#define SNPARGS(buf, len) buf + len, sizeof(buf) > len ? sizeof(buf) - len : 0 - -static int add_entry6 __P((struct ip6_fw_head *chainptr, struct ip6_fw *frwl)); -static int del_entry6 __P((struct ip6_fw_head *chainptr, u_short number)); -static int zero_entry6 __P((struct mbuf *m)); -static struct ip6_fw *check_ip6fw_struct __P((struct ip6_fw *m)); -static struct ip6_fw *check_ip6fw_mbuf __P((struct mbuf *fw)); -static int ip6opts_match __P((struct ip6_hdr **ip6, struct ip6_fw *f, - struct mbuf **m, - int *off, int *nxt, u_short *offset)); -static int port_match6 __P((u_short *portptr, int nports, u_short port, - int range_flag)); -static int tcp6flg_match __P((struct tcphdr *tcp6, struct ip6_fw *f)); -static int icmp6type_match __P((struct icmp6_hdr * icmp, struct ip6_fw * f)); -static void ip6fw_report __P((struct ip6_fw *f, struct ip6_hdr *ip6, - struct ifnet *rif, struct ifnet *oif, int off, int nxt)); - -static int ip6_fw_chk __P((struct ip6_hdr **pip6, - struct ifnet *oif, u_int16_t *cookie, struct mbuf **m)); -static int ip6_fw_ctl __P((int stage, struct mbuf **mm)); - -static char err_prefix[] = "ip6_fw_ctl:"; - -/* - * Returns 1 if the port is matched by the vector, 0 otherwise - */ -static -__inline -int -port_match6(u_short *portptr, int nports, u_short port, int range_flag) -{ - if (!nports) - return 1; - if (range_flag) { - if (portptr[0] <= port && port <= portptr[1]) { - return 1; - } - nports -= 2; - portptr += 2; - } - while (nports-- > 0) { - if (*portptr++ == port) { - return 1; - } - } - return 0; -} - -static int -tcp6flg_match(struct tcphdr *tcp6, struct ip6_fw *f) -{ - u_char flg_set, flg_clr; - - /* - * If an established connection is required, reject packets that - * have only SYN of RST|ACK|SYN set. Otherwise, fall through to - * other flag requirements. - */ - if ((f->fw_ipflg & IPV6_FW_IF_TCPEST) && - ((tcp6->th_flags & (IPV6_FW_TCPF_RST | IPV6_FW_TCPF_ACK | - IPV6_FW_TCPF_SYN)) == IPV6_FW_TCPF_SYN)) - return 0; - - flg_set = tcp6->th_flags & f->fw_tcpf; - flg_clr = tcp6->th_flags & f->fw_tcpnf; - - if (flg_set != f->fw_tcpf) - return 0; - if (flg_clr) - return 0; - - return 1; -} - -static int -icmp6type_match(struct icmp6_hdr *icmp6, struct ip6_fw *f) -{ - int type; - - if (!(f->fw_flg & IPV6_FW_F_ICMPBIT)) - return (1); - - type = icmp6->icmp6_type; - - /* check for matching type in the bitmap */ - if (type < IPV6_FW_ICMPTYPES_DIM * sizeof(unsigned) * 8 && - (f->fw_icmp6types[type / (sizeof(unsigned) * 8)] & - (1U << (type % (8 * sizeof(unsigned)))))) - return (1); - - return (0); /* no match */ -} - -static int -is_icmp6_query(struct ip6_hdr *ip6, int off) -{ - const struct icmp6_hdr *icmp6; - int icmp6_type; - - icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off); - icmp6_type = icmp6->icmp6_type; - - if (icmp6_type == ICMP6_ECHO_REQUEST || - icmp6_type == ICMP6_MEMBERSHIP_QUERY || - icmp6_type == ICMP6_WRUREQUEST || - icmp6_type == ICMP6_FQDN_QUERY || - icmp6_type == ICMP6_NI_QUERY) - return (1); - - return (0); -} - -static int -ip6opts_match(struct ip6_hdr **pip6, struct ip6_fw *f, struct mbuf **m, - int *off, int *nxt, u_short *offset) -{ - int len; - struct ip6_hdr *ip6 = *pip6; - struct ip6_ext *ip6e; - u_char opts, nopts, nopts_sve; - - opts = f->fw_ip6opt; - nopts = nopts_sve = f->fw_ip6nopt; - - *nxt = ip6->ip6_nxt; - *off = sizeof(struct ip6_hdr); - len = ntohs(ip6->ip6_plen) + sizeof(struct ip6_hdr); - while (*off < len) { - ip6e = (struct ip6_ext *)((caddr_t) ip6 + *off); - if ((*m)->m_len < *off + sizeof(*ip6e)) - goto opts_check; /* XXX */ - - switch (*nxt) { - case IPPROTO_FRAGMENT: - if ((*m)->m_len >= *off + sizeof(struct ip6_frag)) { - struct ip6_frag *ip6f; - - ip6f = (struct ip6_frag *) ((caddr_t)ip6 + *off); - *offset = ip6f->ip6f_offlg & IP6F_OFF_MASK; - } - opts &= ~IPV6_FW_IP6OPT_FRAG; - nopts &= ~IPV6_FW_IP6OPT_FRAG; - *off += sizeof(struct ip6_frag); - break; - case IPPROTO_AH: - opts &= ~IPV6_FW_IP6OPT_AH; - nopts &= ~IPV6_FW_IP6OPT_AH; - *off += (ip6e->ip6e_len + 2) << 2; - break; - default: - switch (*nxt) { - case IPPROTO_HOPOPTS: - opts &= ~IPV6_FW_IP6OPT_HOPOPT; - nopts &= ~IPV6_FW_IP6OPT_HOPOPT; - break; - case IPPROTO_ROUTING: - opts &= ~IPV6_FW_IP6OPT_ROUTE; - nopts &= ~IPV6_FW_IP6OPT_ROUTE; - break; - case IPPROTO_ESP: - opts &= ~IPV6_FW_IP6OPT_ESP; - nopts &= ~IPV6_FW_IP6OPT_ESP; - goto opts_check; - case IPPROTO_NONE: - opts &= ~IPV6_FW_IP6OPT_NONXT; - nopts &= ~IPV6_FW_IP6OPT_NONXT; - goto opts_check; - case IPPROTO_DSTOPTS: - opts &= ~IPV6_FW_IP6OPT_OPTS; - nopts &= ~IPV6_FW_IP6OPT_OPTS; - break; - default: - goto opts_check; - } - *off += (ip6e->ip6e_len + 1) << 3; - break; - } - *nxt = ip6e->ip6e_nxt; - - } - opts_check: - if (f->fw_ip6opt == f->fw_ip6nopt) /* XXX */ - return 1; - - if (opts == 0 && nopts == nopts_sve) - return 1; - else - return 0; -} - -static -__inline -int -iface_match(struct ifnet *ifp, union ip6_fw_if *ifu, int byname) -{ - /* Check by name or by IP address */ - if (byname) { - /* Check name */ - if (ifu->fu_via_if.glob) { - if (fnmatch(ifu->fu_via_if.name, ifp->if_xname, 0) - == FNM_NOMATCH) - return(0); - } else { - if (strncmp(ifp->if_xname, ifu->fu_via_if.name, - IP6FW_IFNLEN) != 0) - return(0); - } - return(1); - } else if (!IN6_IS_ADDR_UNSPECIFIED(&ifu->fu_via_ip6)) { /* Zero == wildcard */ - struct ifaddr *ia; - - for (ia = ifp->if_addrlist.tqh_first; ia; ia = ia->ifa_list.tqe_next) { - - if (ia->ifa_addr == NULL) - continue; - if (ia->ifa_addr->sa_family != AF_INET6) - continue; - if (!IN6_ARE_ADDR_EQUAL(&ifu->fu_via_ip6, - &(((struct sockaddr_in6 *) - (ia->ifa_addr))->sin6_addr))) - continue; - return (1); - } - return (0); - } - return (1); -} - -static void -ip6fw_report(struct ip6_fw *f, struct ip6_hdr *ip6, - struct ifnet *rif, struct ifnet *oif, int off, int nxt) -{ - static int counter; - struct tcphdr *const tcp6 = (struct tcphdr *) ((caddr_t) ip6+ off); - struct udphdr *const udp = (struct udphdr *) ((caddr_t) ip6+ off); - struct icmp6_hdr *const icmp6 = (struct icmp6_hdr *) ((caddr_t) ip6+ off); - int count; - char *action; - char action2[32], proto[102], name[18]; - int len; - - count = f ? f->fw_pcnt : ++counter; - if (fw6_verbose_limit != 0 && count > fw6_verbose_limit) - return; - - /* Print command name */ - snprintf(SNPARGS(name, 0), "ip6fw: %d", f ? f->fw_number : -1); - - action = action2; - if (!f) - action = "Refuse"; - else { - switch (f->fw_flg & IPV6_FW_F_COMMAND) { - case IPV6_FW_F_DENY: - action = "Deny"; - break; - case IPV6_FW_F_REJECT: - if (f->fw_reject_code == IPV6_FW_REJECT_RST) - action = "Reset"; - else - action = "Unreach"; - break; - case IPV6_FW_F_ACCEPT: - action = "Accept"; - break; - case IPV6_FW_F_COUNT: - action = "Count"; - break; - case IPV6_FW_F_DIVERT: - snprintf(SNPARGS(action2, 0), "Divert %d", - f->fw_divert_port); - break; - case IPV6_FW_F_TEE: - snprintf(SNPARGS(action2, 0), "Tee %d", - f->fw_divert_port); - break; - case IPV6_FW_F_SKIPTO: - snprintf(SNPARGS(action2, 0), "SkipTo %d", - f->fw_skipto_rule); - break; - default: - action = "UNKNOWN"; - break; - } - } - - switch (nxt) { - case IPPROTO_TCP: - len = snprintf(SNPARGS(proto, 0), "TCP [%s]", - ip6_sprintf(&ip6->ip6_src)); - if (off > 0) - len += snprintf(SNPARGS(proto, len), ":%d ", - ntohs(tcp6->th_sport)); - else - len += snprintf(SNPARGS(proto, len), " "); - len += snprintf(SNPARGS(proto, len), "[%s]", - ip6_sprintf(&ip6->ip6_dst)); - if (off > 0) - snprintf(SNPARGS(proto, len), ":%d", - ntohs(tcp6->th_dport)); - break; - case IPPROTO_UDP: - len = snprintf(SNPARGS(proto, 0), "UDP [%s]", - ip6_sprintf(&ip6->ip6_src)); - if (off > 0) - len += snprintf(SNPARGS(proto, len), ":%d ", - ntohs(udp->uh_sport)); - else - len += snprintf(SNPARGS(proto, len), " "); - len += snprintf(SNPARGS(proto, len), "[%s]", - ip6_sprintf(&ip6->ip6_dst)); - if (off > 0) - snprintf(SNPARGS(proto, len), ":%d", - ntohs(udp->uh_dport)); - break; - case IPPROTO_ICMPV6: - if (off > 0) - len = snprintf(SNPARGS(proto, 0), "IPV6-ICMP:%u.%u ", - icmp6->icmp6_type, icmp6->icmp6_code); - else - len = snprintf(SNPARGS(proto, 0), "IPV6-ICMP "); - len += snprintf(SNPARGS(proto, len), "[%s]", - ip6_sprintf(&ip6->ip6_src)); - snprintf(SNPARGS(proto, len), " [%s]", - ip6_sprintf(&ip6->ip6_dst)); - break; - default: - len = snprintf(SNPARGS(proto, 0), "P:%d [%s]", nxt, - ip6_sprintf(&ip6->ip6_src)); - snprintf(SNPARGS(proto, len), " [%s]", - ip6_sprintf(&ip6->ip6_dst)); - break; - } - - if (oif) - log(LOG_SECURITY | LOG_INFO, "%s %s %s out via %s\n", - name, action, proto, if_name(oif)); - else if (rif) - log(LOG_SECURITY | LOG_INFO, "%s %s %s in via %s\n", - name, action, proto, if_name(rif)); - else - log(LOG_SECURITY | LOG_INFO, "%s %s %s", - name, action, proto); - if (fw6_verbose_limit != 0 && count == fw6_verbose_limit) - log(LOG_SECURITY | LOG_INFO, "ip6fw: limit reached on entry %d\n", - f ? f->fw_number : -1); -} - -/* - * Parameters: - * - * ip Pointer to packet header (struct ip6_hdr *) - * hlen Packet header length - * oif Outgoing interface, or NULL if packet is incoming - * #ifndef IP6FW_DIVERT_RESTART - * *cookie Ignore all divert/tee rules to this port (if non-zero) - * #else - * *cookie Skip up to the first rule past this rule number; - * #endif - * *m The packet; we set to NULL when/if we nuke it. - * - * Return value: - * - * 0 The packet is to be accepted and routed normally OR - * the packet was denied/rejected and has been dropped; - * in the latter case, *m is equal to NULL upon return. - * port Divert the packet to port. - */ - -static int -ip6_fw_chk(struct ip6_hdr **pip6, - struct ifnet *oif, u_int16_t *cookie, struct mbuf **m) -{ - struct ip6_fw_chain *chain; - struct ip6_fw *rule = NULL; - struct ip6_hdr *ip6 = *pip6; - struct ifnet *const rif = (*m)->m_pkthdr.rcvif; - u_short offset = 0; - int off = sizeof(struct ip6_hdr), nxt = ip6->ip6_nxt; - u_short src_port, dst_port; -#ifdef IP6FW_DIVERT_RESTART - u_int16_t skipto = *cookie; -#else - u_int16_t ignport = ntohs(*cookie); -#endif - - *cookie = 0; - /* - * Go down the chain, looking for enlightment - * #ifdef IP6FW_DIVERT_RESTART - * If we've been asked to start at a given rule immediatly, do so. - * #endif - */ - chain = LIST_FIRST(&ip6_fw_chain); -#ifdef IP6FW_DIVERT_RESTART - if (skipto) { - if (skipto >= 65535) - goto dropit; - while (chain && (chain->rule->fw_number <= skipto)) { - chain = LIST_NEXT(chain, chain); - } - if (! chain) goto dropit; - } -#endif /* IP6FW_DIVERT_RESTART */ - for (; chain; chain = LIST_NEXT(chain, chain)) { - struct ip6_fw *const f = chain->rule; - - if (oif) { - /* Check direction outbound */ - if (!(f->fw_flg & IPV6_FW_F_OUT)) - continue; - } else { - /* Check direction inbound */ - if (!(f->fw_flg & IPV6_FW_F_IN)) - continue; - } - -#define IN6_ARE_ADDR_MASKEQUAL(x,y,z) (\ - (((x)->s6_addr32[0] & (y)->s6_addr32[0]) == (z)->s6_addr32[0]) && \ - (((x)->s6_addr32[1] & (y)->s6_addr32[1]) == (z)->s6_addr32[1]) && \ - (((x)->s6_addr32[2] & (y)->s6_addr32[2]) == (z)->s6_addr32[2]) && \ - (((x)->s6_addr32[3] & (y)->s6_addr32[3]) == (z)->s6_addr32[3])) - - /* If src-addr doesn't match, not this rule. */ - if (((f->fw_flg & IPV6_FW_F_INVSRC) != 0) ^ - (!IN6_ARE_ADDR_MASKEQUAL(&ip6->ip6_src,&f->fw_smsk,&f->fw_src))) - continue; - - /* If dest-addr doesn't match, not this rule. */ - if (((f->fw_flg & IPV6_FW_F_INVDST) != 0) ^ - (!IN6_ARE_ADDR_MASKEQUAL(&ip6->ip6_dst,&f->fw_dmsk,&f->fw_dst))) - continue; - -#undef IN6_ARE_ADDR_MASKEQUAL - /* Interface check */ - if ((f->fw_flg & IF6_FW_F_VIAHACK) == IF6_FW_F_VIAHACK) { - struct ifnet *const iface = oif ? oif : rif; - - /* Backwards compatibility hack for "via" */ - if (!iface || !iface_match(iface, - &f->fw_in_if, f->fw_flg & IPV6_FW_F_OIFNAME)) - continue; - } else { - /* Check receive interface */ - if ((f->fw_flg & IPV6_FW_F_IIFACE) - && (!rif || !iface_match(rif, - &f->fw_in_if, f->fw_flg & IPV6_FW_F_IIFNAME))) - continue; - /* Check outgoing interface */ - if ((f->fw_flg & IPV6_FW_F_OIFACE) - && (!oif || !iface_match(oif, - &f->fw_out_if, f->fw_flg & IPV6_FW_F_OIFNAME))) - continue; - } - - /* Check IP options */ - if (!ip6opts_match(&ip6, f, m, &off, &nxt, &offset)) - continue; - - /* Fragments */ - if ((f->fw_flg & IPV6_FW_F_FRAG) && !offset) - continue; - - /* Check protocol; if wildcard, match */ - if (f->fw_prot == IPPROTO_IPV6) - goto got_match; - - /* If different, don't match */ - if (nxt != f->fw_prot) - continue; - -#define PULLUP_TO(len) do { \ - if ((*m)->m_len < (len) \ - && (*m = m_pullup(*m, (len))) == 0) { \ - goto dropit; \ - } \ - *pip6 = ip6 = mtod(*m, struct ip6_hdr *); \ - } while (/*CONSTCOND*/ 0) - - /* Protocol specific checks */ - switch (nxt) { - case IPPROTO_TCP: - { - struct tcphdr *tcp6; - - if (offset == 1) { /* cf. RFC 1858 */ - PULLUP_TO(off + 4); /* XXX ? */ - goto bogusfrag; - } - if (offset != 0) { - /* - * TCP flags and ports aren't available in this - * packet -- if this rule specified either one, - * we consider the rule a non-match. - */ - if (f->fw_nports != 0 || - f->fw_tcpf != f->fw_tcpnf) - continue; - - break; - } - PULLUP_TO(off + 14); - tcp6 = (struct tcphdr *) ((caddr_t)ip6 + off); - if (((f->fw_tcpf != f->fw_tcpnf) || - (f->fw_ipflg & IPV6_FW_IF_TCPEST)) && - !tcp6flg_match(tcp6, f)) - continue; - src_port = ntohs(tcp6->th_sport); - dst_port = ntohs(tcp6->th_dport); - goto check_ports; - } - - case IPPROTO_UDP: - { - struct udphdr *udp; - - if (offset != 0) { - /* - * Port specification is unavailable -- if this - * rule specifies a port, we consider the rule - * a non-match. - */ - if (f->fw_nports != 0) - continue; - - break; - } - PULLUP_TO(off + 4); - udp = (struct udphdr *) ((caddr_t)ip6 + off); - src_port = ntohs(udp->uh_sport); - dst_port = ntohs(udp->uh_dport); -check_ports: - if (!port_match6(&f->fw_pts[0], - IPV6_FW_GETNSRCP(f), src_port, - f->fw_flg & IPV6_FW_F_SRNG)) - continue; - if (!port_match6(&f->fw_pts[IPV6_FW_GETNSRCP(f)], - IPV6_FW_GETNDSTP(f), dst_port, - f->fw_flg & IPV6_FW_F_DRNG)) - continue; - break; - } - - case IPPROTO_ICMPV6: - { - struct icmp6_hdr *icmp; - - if (offset != 0) /* Type isn't valid */ - break; - PULLUP_TO(off + 2); - icmp = (struct icmp6_hdr *) ((caddr_t)ip6 + off); - if (!icmp6type_match(icmp, f)) - continue; - break; - } -#undef PULLUP_TO - -bogusfrag: - if (fw6_verbose) - ip6fw_report(NULL, ip6, rif, oif, off, nxt); - goto dropit; - } - -got_match: -#ifndef IP6FW_DIVERT_RESTART - /* Ignore divert/tee rule if socket port is "ignport" */ - switch (f->fw_flg & IPV6_FW_F_COMMAND) { - case IPV6_FW_F_DIVERT: - case IPV6_FW_F_TEE: - if (f->fw_divert_port == ignport) - continue; /* ignore this rule */ - break; - } - -#endif /* IP6FW_DIVERT_RESTART */ - /* Update statistics */ - f->fw_pcnt += 1; - f->fw_bcnt += ntohs(ip6->ip6_plen); - f->timestamp = time_second; - - /* Log to console if desired */ - if ((f->fw_flg & IPV6_FW_F_PRN) && fw6_verbose) - ip6fw_report(f, ip6, rif, oif, off, nxt); - - /* Take appropriate action */ - switch (f->fw_flg & IPV6_FW_F_COMMAND) { - case IPV6_FW_F_ACCEPT: - return (0); - case IPV6_FW_F_COUNT: - continue; - case IPV6_FW_F_DIVERT: -#ifdef IP6FW_DIVERT_RESTART - *cookie = f->fw_number; -#else - *cookie = htons(f->fw_divert_port); -#endif /* IP6FW_DIVERT_RESTART */ - return (f->fw_divert_port); - case IPV6_FW_F_TEE: - /* - * XXX someday tee packet here, but beware that you - * can't use m_copym() or m_copypacket() because - * the divert input routine modifies the mbuf - * (and these routines only increment reference - * counts in the case of mbuf clusters), so need - * to write custom routine. - */ - continue; - case IPV6_FW_F_SKIPTO: -#ifdef DIAGNOSTIC - while (chain->chain.le_next - && chain->chain.le_next->rule->fw_number - < f->fw_skipto_rule) -#else - while (chain->chain.le_next->rule->fw_number - < f->fw_skipto_rule) -#endif - chain = chain->chain.le_next; - continue; - } - - /* Deny/reject this packet using this rule */ - rule = f; - break; - } - -#ifdef DIAGNOSTIC - /* Rule 65535 should always be there and should always match */ - if (!chain) - panic("ip6_fw: chain"); -#endif - - /* - * At this point, we're going to drop the packet. - * Send a reject notice if all of the following are true: - * - * - The packet matched a reject rule - * - The packet is not an ICMP packet, or is an ICMP query packet - * - The packet is not a multicast or broadcast packet - */ - if (rule && (rule->fw_flg & IPV6_FW_F_COMMAND) == IPV6_FW_F_REJECT - && (nxt != IPPROTO_ICMPV6 || is_icmp6_query(ip6, off)) - && !((*m)->m_flags & (M_BCAST|M_MCAST)) - && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { - switch (rule->fw_reject_code) { - case IPV6_FW_REJECT_RST: -#if 1 /* not tested */ - { - struct tcphdr *const tcp = - (struct tcphdr *) ((caddr_t)ip6 + off); - struct { - struct ip6_hdr ip6; - struct tcphdr th; - } ti; - tcp_seq ack, seq; - int flags; - - if (offset != 0 || (tcp->th_flags & TH_RST)) - break; - - ti.ip6 = *ip6; - ti.th = *tcp; - ti.th.th_seq = ntohl(ti.th.th_seq); - ti.th.th_ack = ntohl(ti.th.th_ack); - ti.ip6.ip6_nxt = IPPROTO_TCP; - if (ti.th.th_flags & TH_ACK) { - ack = 0; - seq = ti.th.th_ack; - flags = TH_RST; - } else { - ack = ti.th.th_seq; - if (((*m)->m_flags & M_PKTHDR) != 0) { - ack += (*m)->m_pkthdr.len - off - - (ti.th.th_off << 2); - } else if (ip6->ip6_plen) { - ack += ntohs(ip6->ip6_plen) + sizeof(*ip6) - - off - (ti.th.th_off << 2); - } else { - m_freem(*m); - *m = 0; - break; - } - if (tcp->th_flags & TH_SYN) - ack++; - seq = 0; - flags = TH_RST|TH_ACK; - } - bcopy(&ti, ip6, sizeof(ti)); - tcp_respond(NULL, ip6, (struct tcphdr *)(ip6 + 1), - *m, ack, seq, flags); - *m = NULL; - break; - } -#endif - default: /* Send an ICMP unreachable using code */ - if (oif) - (*m)->m_pkthdr.rcvif = oif; - icmp6_error(*m, ICMP6_DST_UNREACH, - rule->fw_reject_code, 0); - *m = NULL; - break; - } - } - -dropit: - /* - * Finally, drop the packet. - */ - if (*m) { - m_freem(*m); - *m = NULL; - } - return (0); -} - -static int -add_entry6(struct ip6_fw_head *chainptr, struct ip6_fw *frwl) -{ - struct ip6_fw *ftmp = 0; - struct ip6_fw_chain *fwc = 0, *fcp, *fcpl = 0; - u_short nbr = 0; - int s; - - fwc = malloc(sizeof *fwc, M_IP6FW, M_NOWAIT); - ftmp = malloc(sizeof *ftmp, M_IP6FW, M_NOWAIT); - if (!fwc || !ftmp) { - dprintf(("%s malloc said no\n", err_prefix)); - if (fwc) free(fwc, M_IP6FW); - if (ftmp) free(ftmp, M_IP6FW); - return (ENOSPC); - } - - bcopy(frwl, ftmp, sizeof(struct ip6_fw)); - ftmp->fw_in_if.fu_via_if.name[IP6FW_IFNLEN - 1] = '\0'; - ftmp->fw_pcnt = 0L; - ftmp->fw_bcnt = 0L; - fwc->rule = ftmp; - - s = splnet(); - - if (!chainptr->lh_first) { - LIST_INSERT_HEAD(chainptr, fwc, chain); - splx(s); - return (0); - } else if (ftmp->fw_number == (u_short)-1) { - if (fwc) free(fwc, M_IP6FW); - if (ftmp) free(ftmp, M_IP6FW); - splx(s); - dprintf(("%s bad rule number\n", err_prefix)); - return (EINVAL); - } - - /* If entry number is 0, find highest numbered rule and add 100 */ - if (ftmp->fw_number == 0) { - for (fcp = chainptr->lh_first; fcp; fcp = fcp->chain.le_next) { - if (fcp->rule->fw_number != (u_short)-1) - nbr = fcp->rule->fw_number; - else - break; - } - if (nbr < (u_short)-1 - 100) - nbr += 100; - ftmp->fw_number = nbr; - } - - /* Got a valid number; now insert it, keeping the list ordered */ - for (fcp = chainptr->lh_first; fcp; fcp = fcp->chain.le_next) { - if (fcp->rule->fw_number > ftmp->fw_number) { - if (fcpl) { - LIST_INSERT_AFTER(fcpl, fwc, chain); - } else { - LIST_INSERT_HEAD(chainptr, fwc, chain); - } - break; - } else { - fcpl = fcp; - } - } - - splx(s); - return (0); -} - -static int -del_entry6(struct ip6_fw_head *chainptr, u_short number) -{ - struct ip6_fw_chain *fcp; - int s; - - s = splnet(); - - fcp = chainptr->lh_first; - if (number != (u_short)-1) { - for (; fcp; fcp = fcp->chain.le_next) { - if (fcp->rule->fw_number == number) { - LIST_REMOVE(fcp, chain); - splx(s); - free(fcp->rule, M_IP6FW); - free(fcp, M_IP6FW); - return 0; - } - } - } - - splx(s); - return (EINVAL); -} - -static int -zero_entry6(struct mbuf *m) -{ - struct ip6_fw *frwl; - struct ip6_fw_chain *fcp; - int s; - - if (m && m->m_len != 0) { - if (m->m_len != sizeof(struct ip6_fw)) - return (EINVAL); - frwl = mtod(m, struct ip6_fw *); - } - else - frwl = NULL; - - /* - * It's possible to insert multiple chain entries with the - * same number, so we don't stop after finding the first - * match if zeroing a specific entry. - */ - s = splnet(); - for (fcp = ip6_fw_chain.lh_first; fcp; fcp = fcp->chain.le_next) - if (!frwl || frwl->fw_number == fcp->rule->fw_number) { - fcp->rule->fw_bcnt = fcp->rule->fw_pcnt = 0; - fcp->rule->timestamp = 0; - } - splx(s); - - if (fw6_verbose) { - if (frwl) - log(LOG_SECURITY | LOG_NOTICE, - "ip6fw: Entry %d cleared.\n", frwl->fw_number); - else - log(LOG_SECURITY | LOG_NOTICE, - "ip6fw: Accounting cleared.\n"); - } - - return (0); -} - -static struct ip6_fw * -check_ip6fw_mbuf(struct mbuf *m) -{ - /* Check length */ - if (m->m_len != sizeof(struct ip6_fw)) { - dprintf(("%s len=%d, want %zu\n", err_prefix, m->m_len, - sizeof(struct ip6_fw))); - return (NULL); - } - return (check_ip6fw_struct(mtod(m, struct ip6_fw *))); -} - -static struct ip6_fw * -check_ip6fw_struct(struct ip6_fw *frwl) -{ - /* Check for invalid flag bits */ - if ((frwl->fw_flg & ~IPV6_FW_F_MASK) != 0) { - dprintf(("%s undefined flag bits set (flags=%x)\n", - err_prefix, frwl->fw_flg)); - return (NULL); - } - /* Must apply to incoming or outgoing (or both) */ - if (!(frwl->fw_flg & (IPV6_FW_F_IN | IPV6_FW_F_OUT))) { - dprintf(("%s neither in nor out\n", err_prefix)); - return (NULL); - } - /* Empty interface name is no good */ - if (((frwl->fw_flg & IPV6_FW_F_IIFNAME) - && !*frwl->fw_in_if.fu_via_if.name) - || ((frwl->fw_flg & IPV6_FW_F_OIFNAME) - && !*frwl->fw_out_if.fu_via_if.name)) { - dprintf(("%s empty interface name\n", err_prefix)); - return (NULL); - } - /* Sanity check interface matching */ - if ((frwl->fw_flg & IF6_FW_F_VIAHACK) == IF6_FW_F_VIAHACK) { - ; /* allow "via" backwards compatibility */ - } else if ((frwl->fw_flg & IPV6_FW_F_IN) - && (frwl->fw_flg & IPV6_FW_F_OIFACE)) { - dprintf(("%s outgoing interface check on incoming\n", - err_prefix)); - return (NULL); - } - /* Sanity check port ranges */ - if ((frwl->fw_flg & IPV6_FW_F_SRNG) && IPV6_FW_GETNSRCP(frwl) < 2) { - dprintf(("%s src range set but n_src_p=%d\n", - err_prefix, IPV6_FW_GETNSRCP(frwl))); - return (NULL); - } - if ((frwl->fw_flg & IPV6_FW_F_DRNG) && IPV6_FW_GETNDSTP(frwl) < 2) { - dprintf(("%s dst range set but n_dst_p=%d\n", - err_prefix, IPV6_FW_GETNDSTP(frwl))); - return (NULL); - } - if (IPV6_FW_GETNSRCP(frwl) + IPV6_FW_GETNDSTP(frwl) > IPV6_FW_MAX_PORTS) { - dprintf(("%s too many ports (%d+%d)\n", - err_prefix, IPV6_FW_GETNSRCP(frwl), IPV6_FW_GETNDSTP(frwl))); - return (NULL); - } - /* - * Protocols other than TCP/UDP don't use port range - */ - if ((frwl->fw_prot != IPPROTO_TCP) && - (frwl->fw_prot != IPPROTO_UDP) && - (IPV6_FW_GETNSRCP(frwl) || IPV6_FW_GETNDSTP(frwl))) { - dprintf(("%s port(s) specified for non TCP/UDP rule\n", - err_prefix)); - return (NULL); - } - - /* - * Rather than modify the entry to make such entries work, - * we reject this rule and require user level utilities - * to enforce whatever policy they deem appropriate. - */ - if ((frwl->fw_src.s6_addr32[0] & (~frwl->fw_smsk.s6_addr32[0])) || - (frwl->fw_src.s6_addr32[1] & (~frwl->fw_smsk.s6_addr32[1])) || - (frwl->fw_src.s6_addr32[2] & (~frwl->fw_smsk.s6_addr32[2])) || - (frwl->fw_src.s6_addr32[3] & (~frwl->fw_smsk.s6_addr32[3])) || - (frwl->fw_dst.s6_addr32[0] & (~frwl->fw_dmsk.s6_addr32[0])) || - (frwl->fw_dst.s6_addr32[1] & (~frwl->fw_dmsk.s6_addr32[1])) || - (frwl->fw_dst.s6_addr32[2] & (~frwl->fw_dmsk.s6_addr32[2])) || - (frwl->fw_dst.s6_addr32[3] & (~frwl->fw_dmsk.s6_addr32[3]))) { - dprintf(("%s rule never matches\n", err_prefix)); - return (NULL); - } - - if ((frwl->fw_flg & IPV6_FW_F_FRAG) && - (frwl->fw_prot == IPPROTO_UDP || frwl->fw_prot == IPPROTO_TCP)) { - if (frwl->fw_nports) { - dprintf(("%s cannot mix 'frag' and ports\n", err_prefix)); - return (NULL); - } - if (frwl->fw_prot == IPPROTO_TCP && - frwl->fw_tcpf != frwl->fw_tcpnf) { - dprintf(("%s cannot mix 'frag' with TCP flags\n", err_prefix)); - return (NULL); - } - } - - /* Check command specific stuff */ - switch (frwl->fw_flg & IPV6_FW_F_COMMAND) - { - case IPV6_FW_F_REJECT: - if (frwl->fw_reject_code >= 0x100 - && !(frwl->fw_prot == IPPROTO_TCP - && frwl->fw_reject_code == IPV6_FW_REJECT_RST)) { - dprintf(("%s unknown reject code\n", err_prefix)); - return (NULL); - } - break; - case IPV6_FW_F_DIVERT: /* Diverting to port zero is invalid */ - case IPV6_FW_F_TEE: - if (frwl->fw_divert_port == 0) { - dprintf(("%s can't divert to port 0\n", err_prefix)); - return (NULL); - } - break; - case IPV6_FW_F_DENY: - case IPV6_FW_F_ACCEPT: - case IPV6_FW_F_COUNT: - case IPV6_FW_F_SKIPTO: - break; - default: - dprintf(("%s invalid command\n", err_prefix)); - return (NULL); - } - - return frwl; -} - -static int -ip6_fw_ctl(int stage, struct mbuf **mm) -{ - int error; - struct mbuf *m; - - if (stage == IPV6_FW_GET) { - struct ip6_fw_chain *fcp = ip6_fw_chain.lh_first; - *mm = m = m_get(M_TRYWAIT, MT_DATA); /* XXX */ - if (!m) - return (ENOBUFS); - if (sizeof *(fcp->rule) > MLEN) { - MCLGET(m, M_TRYWAIT); - if ((m->m_flags & M_EXT) == 0) { - m_free(m); - return (ENOBUFS); - } - } - for (; fcp; fcp = fcp->chain.le_next) { - bcopy(fcp->rule, m->m_data, sizeof *(fcp->rule)); - m->m_len = sizeof *(fcp->rule); - m->m_next = m_get(M_TRYWAIT, MT_DATA); /* XXX */ - if (!m->m_next) { - m_freem(*mm); - return (ENOBUFS); - } - m = m->m_next; - if (sizeof *(fcp->rule) > MLEN) { - MCLGET(m, M_TRYWAIT); - if ((m->m_flags & M_EXT) == 0) { - m_freem(*mm); - return (ENOBUFS); - } - } - m->m_len = 0; - } - return (0); - } - m = *mm; - /* only allow get calls if secure mode > 2 */ - if (securelevel > 2) { - if (m) { - (void)m_freem(m); - *mm = 0; - } - return (EPERM); - } - if (stage == IPV6_FW_FLUSH) { - while (ip6_fw_chain.lh_first != NULL && - ip6_fw_chain.lh_first->rule->fw_number != (u_short)-1) { - struct ip6_fw_chain *fcp = ip6_fw_chain.lh_first; - int s = splnet(); - LIST_REMOVE(ip6_fw_chain.lh_first, chain); - splx(s); - free(fcp->rule, M_IP6FW); - free(fcp, M_IP6FW); - } - if (m) { - (void)m_freem(m); - *mm = 0; - } - return (0); - } - if (stage == IPV6_FW_ZERO) { - error = zero_entry6(m); - if (m) { - (void)m_freem(m); - *mm = 0; - } - return (error); - } - if (m == NULL) { - printf("%s NULL mbuf ptr\n", err_prefix); - return (EINVAL); - } - - if (stage == IPV6_FW_ADD) { - struct ip6_fw *frwl = check_ip6fw_mbuf(m); - - if (!frwl) - error = EINVAL; - else - error = add_entry6(&ip6_fw_chain, frwl); - if (m) { - (void)m_freem(m); - *mm = 0; - } - return error; - } - if (stage == IPV6_FW_DEL) { - if (m->m_len != sizeof(struct ip6_fw)) { - dprintf(("%s len=%d, want %zu\n", err_prefix, m->m_len, - sizeof(struct ip6_fw))); - error = EINVAL; - } else if (mtod(m, struct ip6_fw *)->fw_number == (u_short)-1) { - dprintf(("%s can't delete rule 65535\n", err_prefix)); - error = EINVAL; - } else - error = del_entry6(&ip6_fw_chain, - mtod(m, struct ip6_fw *)->fw_number); - if (m) { - (void)m_freem(m); - *mm = 0; - } - return error; - } - - dprintf(("%s unknown request %d\n", err_prefix, stage)); - if (m) { - (void)m_freem(m); - *mm = 0; - } - return (EINVAL); -} - -void -ip6_fw_init(void) -{ - struct ip6_fw default_rule; - - ip6_fw_chk_ptr = ip6_fw_chk; - ip6_fw_ctl_ptr = ip6_fw_ctl; - LIST_INIT(&ip6_fw_chain); - - bzero(&default_rule, sizeof default_rule); - default_rule.fw_prot = IPPROTO_IPV6; - default_rule.fw_number = (u_short)-1; -#ifdef IPV6FIREWALL_DEFAULT_TO_ACCEPT - default_rule.fw_flg |= IPV6_FW_F_ACCEPT; -#else - default_rule.fw_flg |= IPV6_FW_F_DENY; -#endif - default_rule.fw_flg |= IPV6_FW_F_IN | IPV6_FW_F_OUT; - if (check_ip6fw_struct(&default_rule) == NULL || - add_entry6(&ip6_fw_chain, &default_rule)) - panic(__func__); - - /* Setup our sysctl tree */ - sysctl_ctx_init(&ip6_fw_sysctl_ctx); - ip6_fw_sysctl_tree = SYSCTL_ADD_NODE(&ip6_fw_sysctl_ctx, - SYSCTL_STATIC_CHILDREN(_net_inet6_ip6), OID_AUTO, "fw", - CTLFLAG_RW | CTLFLAG_SECURE, 0, "Firewall"); - SYSCTL_ADD_INT(&ip6_fw_sysctl_ctx, SYSCTL_CHILDREN(ip6_fw_sysctl_tree), - OID_AUTO, "enable", CTLFLAG_RW | CTLFLAG_SECURE, &ip6_fw_enable, 0, - "Enable ip6fw"); - SYSCTL_ADD_INT(&ip6_fw_sysctl_ctx, SYSCTL_CHILDREN(ip6_fw_sysctl_tree), - OID_AUTO, "debug", CTLFLAG_RW, &fw6_debug, 0, ""); - SYSCTL_ADD_INT(&ip6_fw_sysctl_ctx, SYSCTL_CHILDREN(ip6_fw_sysctl_tree), - OID_AUTO, "verbose", CTLFLAG_RW | CTLFLAG_SECURE, &fw6_verbose, 0, - ""); - SYSCTL_ADD_INT(&ip6_fw_sysctl_ctx, SYSCTL_CHILDREN(ip6_fw_sysctl_tree), - OID_AUTO, "verbose_limit", CTLFLAG_RW, &fw6_verbose_limit, 0, ""); - - printf("IPv6 packet filtering initialized, "); -#ifdef IPV6FIREWALL_DEFAULT_TO_ACCEPT - printf("default to accept, "); -#endif -#ifndef IPV6FIREWALL_VERBOSE - printf("logging disabled\n"); -#else - if (fw6_verbose_limit == 0) - printf("unlimited logging\n"); - else - printf("logging limited to %d packets/entry\n", - fw6_verbose_limit); -#endif -} - -static ip6_fw_chk_t *old_chk_ptr; -static ip6_fw_ctl_t *old_ctl_ptr; - -static int -ip6fw_modevent(module_t mod, int type, void *unused) -{ - int s; - - switch (type) { - case MOD_LOAD: - s = splnet(); - - old_chk_ptr = ip6_fw_chk_ptr; - old_ctl_ptr = ip6_fw_ctl_ptr; - - ip6_fw_init(); - splx(s); - return 0; - case MOD_UNLOAD: - s = splnet(); - ip6_fw_chk_ptr = old_chk_ptr; - ip6_fw_ctl_ptr = old_ctl_ptr; - while (LIST_FIRST(&ip6_fw_chain) != NULL) { - struct ip6_fw_chain *fcp = LIST_FIRST(&ip6_fw_chain); - LIST_REMOVE(LIST_FIRST(&ip6_fw_chain), chain); - free(fcp->rule, M_IP6FW); - free(fcp, M_IP6FW); - } - - /* Free sysctl tree */ - sysctl_ctx_free(&ip6_fw_sysctl_ctx); - - splx(s); - printf("IPv6 firewall unloaded\n"); - return 0; - default: - return EOPNOTSUPP; - break; - } - return 0; -} - -static moduledata_t ip6fwmod = { - "ip6fw", - ip6fw_modevent, - 0 -}; -DECLARE_MODULE(ip6fw, ip6fwmod, SI_SUB_PSEUDO, SI_ORDER_ANY); diff --git a/sys/netinet6/ip6_fw.h b/sys/netinet6/ip6_fw.h deleted file mode 100644 index 2b5aa9f..0000000 --- a/sys/netinet6/ip6_fw.h +++ /dev/null @@ -1,231 +0,0 @@ -/* $FreeBSD$ */ -/* $KAME: ip6_fw.h,v 1.9 2001/08/01 04:29:57 sumikawa Exp $ */ - -/*- - * Copyright (C) 1998, 1999, 2000 and 2001 WIDE Project. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/*- - * Copyright (c) 1993 Daniel Boulet - * Copyright (c) 1994 Ugen J.S.Antsilevich - * - * Redistribution and use in source forms, with and without modification, - * are permitted provided that this entire comment appears intact. - * - * Redistribution in binary form may occur without any restrictions. - * Obviously, it would be nice if you gave credit where credit is due - * but requiring it would be too onerous. - * - * This software is provided ``AS IS'' without any warranties of any kind. - * - */ - -#ifndef _IP6_FW_H -#define _IP6_FW_H - -#include <net/if.h> - -/* - * This union structure identifies an interface, either explicitly - * by name or implicitly by IP address. The flags IP_FW_F_IIFNAME - * and IP_FW_F_OIFNAME say how to interpret this structure. An - * interface unit number of -1 matches any unit number, while an - * IP address of 0.0.0.0 indicates matches any interface. - * - * The receive and transmit interfaces are only compared against the - * the packet if the corresponding bit (IP_FW_F_IIFACE or IP_FW_F_OIFACE) - * is set. Note some packets lack a receive or transmit interface - * (in which case the missing "interface" never matches). - */ - -union ip6_fw_if { - struct in6_addr fu_via_ip6; /* Specified by IPv6 address */ - struct { /* Specified by interface name */ -#define IP6FW_IFNLEN IFNAMSIZ - char name[IP6FW_IFNLEN]; - short glob; /* Is name a pattern or a name? */ - } fu_via_if; -}; - -/* - * Format of an IP firewall descriptor - * - * fw_src, fw_dst, fw_smsk, fw_dmsk are always stored in network byte order. - * fw_flg and fw_n*p are stored in host byte order (of course). - * Port numbers are stored in HOST byte order. - * Warning: setsockopt() will fail if sizeof(struct ip_fw) > MLEN (108) - */ - -struct ip6_fw { - u_long fw_pcnt,fw_bcnt; /* Packet and byte counters */ - struct in6_addr fw_src, fw_dst; /* Source and destination IPv6 addr */ - struct in6_addr fw_smsk, fw_dmsk; /* Mask for src and dest IPv6 addr */ - u_short fw_number; /* Rule number */ - u_short fw_flg; /* Flags word */ -#define IPV6_FW_MAX_PORTS 10 /* A reasonable maximum */ - u_int fw_ipflg; /* IP flags word */ - u_short fw_pts[IPV6_FW_MAX_PORTS]; /* Array of port numbers to match */ - u_char fw_ip6opt,fw_ip6nopt; /* IPv6 options set/unset */ - u_char fw_tcpf,fw_tcpnf; /* TCP flags set/unset */ -#define IPV6_FW_ICMPTYPES_DIM (256 / (sizeof(unsigned) * 8)) - unsigned fw_icmp6types[IPV6_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */ - long timestamp; /* timestamp (tv_sec) of last match */ - union ip6_fw_if fw_in_if, fw_out_if;/* Incoming and outgoing interfaces */ - union { - u_short fu_divert_port; /* Divert/tee port (options IP6DIVERT) */ - u_short fu_skipto_rule; /* SKIPTO command rule number */ - u_short fu_reject_code; /* REJECT response code */ - } fw_un; - u_char fw_prot; /* IPv6 protocol */ - u_char fw_nports; /* N'of src ports and # of dst ports */ - /* in ports array (dst ports follow */ - /* src ports; max of 10 ports in all; */ - /* count of 0 means match all ports) */ -}; - -#define IPV6_FW_GETNSRCP(rule) ((rule)->fw_nports & 0x0f) -#define IPV6_FW_SETNSRCP(rule, n) do { \ - (rule)->fw_nports &= ~0x0f; \ - (rule)->fw_nports |= (n); \ - } while (/*CONSTCOND*/ 0) -#define IPV6_FW_GETNDSTP(rule) ((rule)->fw_nports >> 4) -#define IPV6_FW_SETNDSTP(rule, n) do { \ - (rule)->fw_nports &= ~0xf0; \ - (rule)->fw_nports |= (n) << 4;\ - } while (/*CONSTCOND*/ 0) - -#define fw_divert_port fw_un.fu_divert_port -#define fw_skipto_rule fw_un.fu_skipto_rule -#define fw_reject_code fw_un.fu_reject_code - -struct ip6_fw_chain { - LIST_ENTRY(ip6_fw_chain) chain; - struct ip6_fw *rule; -}; - -/* - * Values for "flags" field . - */ -#define IPV6_FW_F_IN 0x0001 /* Check inbound packets */ -#define IPV6_FW_F_OUT 0x0002 /* Check outbound packets */ -#define IPV6_FW_F_IIFACE 0x0004 /* Apply inbound interface test */ -#define IPV6_FW_F_OIFACE 0x0008 /* Apply outbound interface test */ - -#define IPV6_FW_F_COMMAND 0x0070 /* Mask for type of chain entry: */ -#define IPV6_FW_F_DENY 0x0000 /* This is a deny rule */ -#define IPV6_FW_F_REJECT 0x0010 /* Deny and send a response packet */ -#define IPV6_FW_F_ACCEPT 0x0020 /* This is an accept rule */ -#define IPV6_FW_F_COUNT 0x0030 /* This is a count rule */ -#define IPV6_FW_F_DIVERT 0x0040 /* This is a divert rule */ -#define IPV6_FW_F_TEE 0x0050 /* This is a tee rule */ -#define IPV6_FW_F_SKIPTO 0x0060 /* This is a skipto rule */ - -#define IPV6_FW_F_PRN 0x0080 /* Print if this rule matches */ - -#define IPV6_FW_F_SRNG 0x0100 /* The first two src ports are a min * - * and max range (stored in host byte * - * order). */ - -#define IPV6_FW_F_DRNG 0x0200 /* The first two dst ports are a min * - * and max range (stored in host byte * - * order). */ - -#define IPV6_FW_F_IIFNAME 0x0400 /* In interface by name/unit (not IP) */ -#define IPV6_FW_F_OIFNAME 0x0800 /* Out interface by name/unit (not IP) */ - -#define IPV6_FW_F_INVSRC 0x1000 /* Invert sense of src check */ -#define IPV6_FW_F_INVDST 0x2000 /* Invert sense of dst check */ - -#define IPV6_FW_F_FRAG 0x4000 /* Fragment */ - -#define IPV6_FW_F_ICMPBIT 0x8000 /* ICMP type bitmap is valid */ - -#define IPV6_FW_F_MASK 0xFFFF /* All possible flag bits mask */ - -/* - * Flags for the 'fw_ipflg' field, for comparing values of ip and its protocols. */ -#define IPV6_FW_IF_TCPEST 0x00000020 /* established TCP connection */ -#define IPV6_FW_IF_TCPMSK 0x00000020 /* mask of all TCP values */ - -/* - * For backwards compatibility with rules specifying "via iface" but - * not restricted to only "in" or "out" packets, we define this combination - * of bits to represent this configuration. - */ - -#define IF6_FW_F_VIAHACK (IPV6_FW_F_IN|IPV6_FW_F_OUT|IPV6_FW_F_IIFACE|IPV6_FW_F_OIFACE) - -/* - * Definitions for REJECT response codes. - * Values less than 256 correspond to ICMP unreachable codes. - */ -#define IPV6_FW_REJECT_RST 0x0100 /* TCP packets: send RST */ - -/* - * Definitions for IPv6 option names. - */ -#define IPV6_FW_IP6OPT_HOPOPT 0x01 -#define IPV6_FW_IP6OPT_ROUTE 0x02 -#define IPV6_FW_IP6OPT_FRAG 0x04 -#define IPV6_FW_IP6OPT_ESP 0x08 -#define IPV6_FW_IP6OPT_AH 0x10 -#define IPV6_FW_IP6OPT_NONXT 0x20 -#define IPV6_FW_IP6OPT_OPTS 0x40 - -/* - * Definitions for TCP flags. - */ -#define IPV6_FW_TCPF_FIN TH_FIN -#define IPV6_FW_TCPF_SYN TH_SYN -#define IPV6_FW_TCPF_RST TH_RST -#define IPV6_FW_TCPF_PSH TH_PUSH -#define IPV6_FW_TCPF_ACK TH_ACK -#define IPV6_FW_TCPF_URG TH_URG - -/* - * Main firewall chains definitions and global var's definitions. - */ -#ifdef _KERNEL - -/* - * Function definitions. - */ -void ip6_fw_init(void); - -/* Firewall hooks */ -struct ip6_hdr; -typedef int ip6_fw_chk_t __P((struct ip6_hdr**, struct ifnet*, - u_short *, struct mbuf**)); -typedef int ip6_fw_ctl_t __P((int, struct mbuf**)); -extern ip6_fw_chk_t *ip6_fw_chk_ptr; -extern ip6_fw_ctl_t *ip6_fw_ctl_ptr; -extern int ip6_fw_enable; - -#endif /* _KERNEL */ - -#endif /* _IP6_FW_H */ diff --git a/sys/netinet6/ip6_input.c b/sys/netinet6/ip6_input.c index a7f5a7c..d0b881c9 100644 --- a/sys/netinet6/ip6_input.c +++ b/sys/netinet6/ip6_input.c @@ -61,7 +61,6 @@ * @(#)ip_input.c 8.2 (Berkeley) 1/4/94 */ -#include "opt_ip6fw.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" @@ -115,8 +114,6 @@ #define IPSEC #endif /* FAST_IPSEC */ -#include <netinet6/ip6_fw.h> - #include <netinet6/ip6protosw.h> #include <net/net_osdep.h> @@ -138,11 +135,6 @@ int ip6_ours_check_algorithm; struct pfil_head inet6_pfil_hook; -/* firewall hooks */ -ip6_fw_chk_t *ip6_fw_chk_ptr; -ip6_fw_ctl_t *ip6_fw_ctl_ptr; -int ip6_fw_enable = 1; - struct ip6stat ip6stat; static void ip6_init2 __P((void *)); @@ -426,21 +418,6 @@ ip6_input(m) passin: /* - * Check with the firewall... - */ - if (ip6_fw_enable && ip6_fw_chk_ptr) { - u_short port = 0; - /* If ipfw says divert, we have to just drop packet */ - /* use port as a dummy argument */ - if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) { - m_freem(m); - m = NULL; - } - if (!m) - return; - } - - /* * Disambiguate address scope zones (if there is ambiguity). * We first make sure that the original source or destination address * is not in our internal form for scoped addresses. Such addresses diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c index 57999f8..98f777a 100644 --- a/sys/netinet6/ip6_output.c +++ b/sys/netinet6/ip6_output.c @@ -61,7 +61,6 @@ * @(#)ip_output.c 8.3 (Berkeley) 1/21/94 */ -#include "opt_ip6fw.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" @@ -106,8 +105,6 @@ #include <netipsec/key.h> #endif /* FAST_IPSEC */ -#include <netinet6/ip6_fw.h> - #include <net/net_osdep.h> #include <netinet6/ip6protosw.h> @@ -839,23 +836,6 @@ again: in6_clearscope(&ip6->ip6_dst); /* - * Check with the firewall... - */ - if (ip6_fw_enable && ip6_fw_chk_ptr) { - u_short port = 0; - m->m_pkthdr.rcvif = NULL; /* XXX */ - /* If ipfw says divert, we have to just drop packet */ - if ((*ip6_fw_chk_ptr)(&ip6, ifp, &port, &m)) { - m_freem(m); - goto done; - } - if (!m) { - error = EACCES; - goto done; - } - } - - /* * If the outgoing packet contains a hop-by-hop options header, * it must be examined and processed even by the source node. * (RFC 2460, section 4.) @@ -1891,27 +1871,6 @@ do { \ break; #endif /* KAME IPSEC */ - case IPV6_FW_ADD: - case IPV6_FW_DEL: - case IPV6_FW_FLUSH: - case IPV6_FW_ZERO: - { - struct mbuf *m; - struct mbuf **mp = &m; - - if (ip6_fw_ctl_ptr == NULL) - return EINVAL; - /* XXX */ - if ((error = soopt_getm(sopt, &m)) != 0) - break; - /* XXX */ - if ((error = soopt_mcopyin(sopt, m)) != 0) - break; - error = (*ip6_fw_ctl_ptr)(optname, mp); - m = *mp; - } - break; - default: error = ENOPROTOOPT; break; @@ -2138,23 +2097,6 @@ do { \ } #endif /* KAME IPSEC */ - case IPV6_FW_GET: - { - struct mbuf *m; - struct mbuf **mp = &m; - - if (ip6_fw_ctl_ptr == NULL) - { - return EINVAL; - } - error = (*ip6_fw_ctl_ptr)(optname, mp); - if (error == 0) - error = soopt_mcopyout(sopt, m); /* XXX */ - if (error == 0 && m) - m_freem(m); - } - break; - default: error = ENOPROTOOPT; break; |