0175018610
This commit replaces those with two new functions that simplify the code
and produce warnings that the syntax is deprecated. A small number of
sensible abbreviations may be explicitly added based on user feedback.
There were previously three types of strncmp use in ipfw:
- Most commonly, strncmp(av, "string", sizeof(av)) was used to allow av
to match string or any shortened form of it. I have replaced this
with a new function _substrcmp(av, "string") which returns 0 if av
is a substring of "string", but emits a warning if av is not exactly
"string".
- The next type was two instances of strncmp(av, "by", 2) which allowed
the abbreviation of bytes to "by", "byt", etc. Unfortunately, it
also supported "bykHUygh&*g&*7*ui". I added a second new function
_substrcmp2(av, "by", "bytes") which acts like the strncmp did, but
complains if the user doesn't spell out the word "bytes".
- There is also one correct use of strncmp to match "table(" which might
have another token after it without a space.
Since I changed all the lines anyway, I also fixed the treatment of
strncmp's return as a boolean in many cases. I also modified a few
strcmp cases as well to be fully consistent.
4418 lines
100 KiB
C
4418 lines
100 KiB
C
/*
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* Copyright (c) 2002-2003 Luigi Rizzo
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* Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
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* Copyright (c) 1994 Ugen J.S.Antsilevich
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*
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* Idea and grammar partially left from:
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* Copyright (c) 1993 Daniel Boulet
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*
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* NEW command line interface for IP firewall facility
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <sys/queue.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <grp.h>
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#include <limits.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <timeconv.h> /* XXX do we need this ? */
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#include <unistd.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <net/if.h>
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#include <net/pfvar.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/ip_fw.h>
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#include <netinet/ip_dummynet.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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int
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do_resolv, /* Would try to resolve all */
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do_time, /* Show time stamps */
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do_quiet, /* Be quiet in add and flush */
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do_pipe, /* this cmd refers to a pipe */
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do_sort, /* field to sort results (0 = no) */
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do_dynamic, /* display dynamic rules */
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do_expired, /* display expired dynamic rules */
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do_compact, /* show rules in compact mode */
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do_force, /* do not ask for confirmation */
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show_sets, /* display rule sets */
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test_only, /* only check syntax */
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comment_only, /* only print action and comment */
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verbose;
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#define IP_MASK_ALL 0xffffffff
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/*
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* the following macro returns an error message if we run out of
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* arguments.
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*/
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#define NEED1(msg) {if (!ac) errx(EX_USAGE, msg);}
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/*
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* _s_x is a structure that stores a string <-> token pairs, used in
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* various places in the parser. Entries are stored in arrays,
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* with an entry with s=NULL as terminator.
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* The search routines are match_token() and match_value().
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* Often, an element with x=0 contains an error string.
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*
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*/
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struct _s_x {
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char const *s;
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int x;
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};
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static struct _s_x f_tcpflags[] = {
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{ "syn", TH_SYN },
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{ "fin", TH_FIN },
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{ "ack", TH_ACK },
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{ "psh", TH_PUSH },
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{ "rst", TH_RST },
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{ "urg", TH_URG },
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{ "tcp flag", 0 },
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{ NULL, 0 }
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};
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static struct _s_x f_tcpopts[] = {
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{ "mss", IP_FW_TCPOPT_MSS },
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{ "maxseg", IP_FW_TCPOPT_MSS },
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{ "window", IP_FW_TCPOPT_WINDOW },
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{ "sack", IP_FW_TCPOPT_SACK },
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{ "ts", IP_FW_TCPOPT_TS },
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{ "timestamp", IP_FW_TCPOPT_TS },
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{ "cc", IP_FW_TCPOPT_CC },
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{ "tcp option", 0 },
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{ NULL, 0 }
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};
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/*
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* IP options span the range 0 to 255 so we need to remap them
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* (though in fact only the low 5 bits are significant).
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*/
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static struct _s_x f_ipopts[] = {
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{ "ssrr", IP_FW_IPOPT_SSRR},
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{ "lsrr", IP_FW_IPOPT_LSRR},
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{ "rr", IP_FW_IPOPT_RR},
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{ "ts", IP_FW_IPOPT_TS},
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{ "ip option", 0 },
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{ NULL, 0 }
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};
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static struct _s_x f_iptos[] = {
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{ "lowdelay", IPTOS_LOWDELAY},
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{ "throughput", IPTOS_THROUGHPUT},
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{ "reliability", IPTOS_RELIABILITY},
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{ "mincost", IPTOS_MINCOST},
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{ "congestion", IPTOS_CE},
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{ "ecntransport", IPTOS_ECT},
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{ "ip tos option", 0},
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{ NULL, 0 }
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};
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static struct _s_x limit_masks[] = {
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{"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
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{"src-addr", DYN_SRC_ADDR},
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{"src-port", DYN_SRC_PORT},
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{"dst-addr", DYN_DST_ADDR},
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{"dst-port", DYN_DST_PORT},
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{NULL, 0}
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};
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/*
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* we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
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* This is only used in this code.
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*/
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#define IPPROTO_ETHERTYPE 0x1000
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static struct _s_x ether_types[] = {
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/*
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* Note, we cannot use "-:&/" in the names because they are field
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* separators in the type specifications. Also, we use s = NULL as
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* end-delimiter, because a type of 0 can be legal.
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*/
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{ "ip", 0x0800 },
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{ "ipv4", 0x0800 },
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{ "ipv6", 0x86dd },
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{ "arp", 0x0806 },
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{ "rarp", 0x8035 },
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{ "vlan", 0x8100 },
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{ "loop", 0x9000 },
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{ "trail", 0x1000 },
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{ "at", 0x809b },
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{ "atalk", 0x809b },
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{ "aarp", 0x80f3 },
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{ "pppoe_disc", 0x8863 },
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{ "pppoe_sess", 0x8864 },
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{ "ipx_8022", 0x00E0 },
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{ "ipx_8023", 0x0000 },
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{ "ipx_ii", 0x8137 },
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{ "ipx_snap", 0x8137 },
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{ "ipx", 0x8137 },
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{ "ns", 0x0600 },
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{ NULL, 0 }
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};
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static void show_usage(void);
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enum tokens {
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TOK_NULL=0,
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TOK_OR,
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TOK_NOT,
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TOK_STARTBRACE,
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TOK_ENDBRACE,
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TOK_ACCEPT,
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TOK_COUNT,
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TOK_PIPE,
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TOK_QUEUE,
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TOK_DIVERT,
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TOK_TEE,
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TOK_FORWARD,
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TOK_SKIPTO,
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TOK_DENY,
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TOK_REJECT,
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TOK_RESET,
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TOK_UNREACH,
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TOK_CHECKSTATE,
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TOK_ALTQ,
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TOK_LOG,
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TOK_UID,
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TOK_GID,
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TOK_JAIL,
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TOK_IN,
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TOK_LIMIT,
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TOK_KEEPSTATE,
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TOK_LAYER2,
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TOK_OUT,
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TOK_DIVERTED,
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TOK_DIVERTEDLOOPBACK,
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TOK_DIVERTEDOUTPUT,
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TOK_XMIT,
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TOK_RECV,
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TOK_VIA,
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TOK_FRAG,
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TOK_IPOPTS,
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TOK_IPLEN,
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TOK_IPID,
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TOK_IPPRECEDENCE,
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TOK_IPTOS,
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TOK_IPTTL,
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TOK_IPVER,
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TOK_ESTAB,
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TOK_SETUP,
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TOK_TCPDATALEN,
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TOK_TCPFLAGS,
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TOK_TCPOPTS,
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TOK_TCPSEQ,
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TOK_TCPACK,
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TOK_TCPWIN,
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TOK_ICMPTYPES,
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TOK_MAC,
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TOK_MACTYPE,
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TOK_VERREVPATH,
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TOK_VERSRCREACH,
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TOK_ANTISPOOF,
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TOK_IPSEC,
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TOK_COMMENT,
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TOK_PLR,
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TOK_NOERROR,
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TOK_BUCKETS,
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TOK_DSTIP,
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TOK_SRCIP,
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TOK_DSTPORT,
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TOK_SRCPORT,
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TOK_ALL,
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TOK_MASK,
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TOK_BW,
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TOK_DELAY,
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TOK_RED,
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TOK_GRED,
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TOK_DROPTAIL,
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TOK_PROTO,
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TOK_WEIGHT,
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};
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struct _s_x dummynet_params[] = {
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{ "plr", TOK_PLR },
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{ "noerror", TOK_NOERROR },
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{ "buckets", TOK_BUCKETS },
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{ "dst-ip", TOK_DSTIP },
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{ "src-ip", TOK_SRCIP },
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{ "dst-port", TOK_DSTPORT },
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{ "src-port", TOK_SRCPORT },
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{ "proto", TOK_PROTO },
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{ "weight", TOK_WEIGHT },
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{ "all", TOK_ALL },
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{ "mask", TOK_MASK },
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{ "droptail", TOK_DROPTAIL },
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{ "red", TOK_RED },
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{ "gred", TOK_GRED },
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{ "bw", TOK_BW },
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{ "bandwidth", TOK_BW },
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{ "delay", TOK_DELAY },
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{ "pipe", TOK_PIPE },
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{ "queue", TOK_QUEUE },
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{ "dummynet-params", TOK_NULL },
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{ NULL, 0 } /* terminator */
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};
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struct _s_x rule_actions[] = {
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{ "accept", TOK_ACCEPT },
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{ "pass", TOK_ACCEPT },
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{ "allow", TOK_ACCEPT },
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{ "permit", TOK_ACCEPT },
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{ "count", TOK_COUNT },
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{ "pipe", TOK_PIPE },
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{ "queue", TOK_QUEUE },
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{ "divert", TOK_DIVERT },
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{ "tee", TOK_TEE },
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{ "fwd", TOK_FORWARD },
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{ "forward", TOK_FORWARD },
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{ "skipto", TOK_SKIPTO },
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{ "deny", TOK_DENY },
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{ "drop", TOK_DENY },
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{ "reject", TOK_REJECT },
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{ "reset", TOK_RESET },
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{ "unreach", TOK_UNREACH },
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{ "check-state", TOK_CHECKSTATE },
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{ "//", TOK_COMMENT },
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{ NULL, 0 } /* terminator */
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};
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struct _s_x rule_action_params[] = {
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{ "altq", TOK_ALTQ },
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{ "log", TOK_LOG },
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{ NULL, 0 } /* terminator */
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};
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struct _s_x rule_options[] = {
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{ "uid", TOK_UID },
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{ "gid", TOK_GID },
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{ "jail", TOK_JAIL },
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{ "in", TOK_IN },
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{ "limit", TOK_LIMIT },
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{ "keep-state", TOK_KEEPSTATE },
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{ "bridged", TOK_LAYER2 },
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{ "layer2", TOK_LAYER2 },
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{ "out", TOK_OUT },
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{ "diverted", TOK_DIVERTED },
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{ "diverted-loopback", TOK_DIVERTEDLOOPBACK },
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{ "diverted-output", TOK_DIVERTEDOUTPUT },
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{ "xmit", TOK_XMIT },
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{ "recv", TOK_RECV },
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{ "via", TOK_VIA },
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{ "fragment", TOK_FRAG },
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{ "frag", TOK_FRAG },
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{ "ipoptions", TOK_IPOPTS },
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{ "ipopts", TOK_IPOPTS },
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{ "iplen", TOK_IPLEN },
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{ "ipid", TOK_IPID },
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{ "ipprecedence", TOK_IPPRECEDENCE },
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{ "iptos", TOK_IPTOS },
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{ "ipttl", TOK_IPTTL },
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{ "ipversion", TOK_IPVER },
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{ "ipver", TOK_IPVER },
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{ "estab", TOK_ESTAB },
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{ "established", TOK_ESTAB },
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{ "setup", TOK_SETUP },
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{ "tcpdatalen", TOK_TCPDATALEN },
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{ "tcpflags", TOK_TCPFLAGS },
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{ "tcpflgs", TOK_TCPFLAGS },
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{ "tcpoptions", TOK_TCPOPTS },
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{ "tcpopts", TOK_TCPOPTS },
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{ "tcpseq", TOK_TCPSEQ },
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{ "tcpack", TOK_TCPACK },
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{ "tcpwin", TOK_TCPWIN },
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{ "icmptype", TOK_ICMPTYPES },
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{ "icmptypes", TOK_ICMPTYPES },
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{ "dst-ip", TOK_DSTIP },
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{ "src-ip", TOK_SRCIP },
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{ "dst-port", TOK_DSTPORT },
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{ "src-port", TOK_SRCPORT },
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{ "proto", TOK_PROTO },
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{ "MAC", TOK_MAC },
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{ "mac", TOK_MAC },
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{ "mac-type", TOK_MACTYPE },
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{ "verrevpath", TOK_VERREVPATH },
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{ "versrcreach", TOK_VERSRCREACH },
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{ "antispoof", TOK_ANTISPOOF },
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{ "ipsec", TOK_IPSEC },
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{ "//", TOK_COMMENT },
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{ "not", TOK_NOT }, /* pseudo option */
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{ "!", /* escape ? */ TOK_NOT }, /* pseudo option */
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{ "or", TOK_OR }, /* pseudo option */
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{ "|", /* escape */ TOK_OR }, /* pseudo option */
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{ "{", TOK_STARTBRACE }, /* pseudo option */
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{ "(", TOK_STARTBRACE }, /* pseudo option */
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{ "}", TOK_ENDBRACE }, /* pseudo option */
|
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{ ")", TOK_ENDBRACE }, /* pseudo option */
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{ NULL, 0 } /* terminator */
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};
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static __inline uint64_t
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align_uint64(uint64_t *pll) {
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uint64_t ret;
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bcopy (pll, &ret, sizeof(ret));
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return ret;
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}
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|
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/*
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* conditionally runs the command.
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*/
|
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static int
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do_cmd(int optname, void *optval, uintptr_t optlen)
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{
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static int s = -1; /* the socket */
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int i;
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|
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if (test_only)
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return 0;
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|
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if (s == -1)
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s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
|
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if (s < 0)
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err(EX_UNAVAILABLE, "socket");
|
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|
|
if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
|
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optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
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optname == IP_FW_TABLE_GETSIZE)
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i = getsockopt(s, IPPROTO_IP, optname, optval,
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(socklen_t *)optlen);
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else
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i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
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return i;
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}
|
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|
|
/**
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* match_token takes a table and a string, returns the value associated
|
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* with the string (-1 in case of failure).
|
|
*/
|
|
static int
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|
match_token(struct _s_x *table, char *string)
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{
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struct _s_x *pt;
|
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uint i = strlen(string);
|
|
|
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for (pt = table ; i && pt->s != NULL ; pt++)
|
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if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
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return pt->x;
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return -1;
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}
|
|
|
|
/**
|
|
* match_value takes a table and a value, returns the string associated
|
|
* with the value (NULL in case of failure).
|
|
*/
|
|
static char const *
|
|
match_value(struct _s_x *p, int value)
|
|
{
|
|
for (; p->s != NULL; p++)
|
|
if (p->x == value)
|
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return p->s;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* _substrcmp takes two strings and returns 1 if they do not match,
|
|
* and 0 if they match exactly or the first string is a sub-string
|
|
* of the second. A warning is printed to stderr in the case that the
|
|
* first string is a sub-string of the second.
|
|
*
|
|
* This function will be removed in the future through the usual
|
|
* deprecation process.
|
|
*/
|
|
static int
|
|
_substrcmp(const char *str1, const char* str2)
|
|
{
|
|
|
|
if (strncmp(str1, str2, strlen(str1)) != 0)
|
|
return 1;
|
|
|
|
if (strlen(str1) != strlen(str2))
|
|
warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
|
|
str1, str2);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* _substrcmp2 takes three strings and returns 1 if the first two do not match,
|
|
* and 0 if they match exactly or the second string is a sub-string
|
|
* of the first. A warning is printed to stderr in the case that the
|
|
* first string does not match the third.
|
|
*
|
|
* This function exists to warn about the bizzare construction
|
|
* strncmp(str, "by", 2) which is used to allow people to use a shotcut
|
|
* for "bytes". The problem is that in addition to accepting "by",
|
|
* "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
|
|
* other string beginning with "by".
|
|
*
|
|
* This function will be removed in the future through the usual
|
|
* deprecation process.
|
|
*/
|
|
static int
|
|
_substrcmp2(const char *str1, const char* str2, const char* str3)
|
|
{
|
|
|
|
if (strncmp(str1, str2, strlen(str2)) != 0)
|
|
return 1;
|
|
|
|
if (strcmp(str1, str3) != 0)
|
|
warnx("DEPRECATED: '%s' matched '%s'",
|
|
str1, str3);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* prints one port, symbolic or numeric
|
|
*/
|
|
static void
|
|
print_port(int proto, uint16_t port)
|
|
{
|
|
|
|
if (proto == IPPROTO_ETHERTYPE) {
|
|
char const *s;
|
|
|
|
if (do_resolv && (s = match_value(ether_types, port)) )
|
|
printf("%s", s);
|
|
else
|
|
printf("0x%04x", port);
|
|
} else {
|
|
struct servent *se = NULL;
|
|
if (do_resolv) {
|
|
struct protoent *pe = getprotobynumber(proto);
|
|
|
|
se = getservbyport(htons(port), pe ? pe->p_name : NULL);
|
|
}
|
|
if (se)
|
|
printf("%s", se->s_name);
|
|
else
|
|
printf("%d", port);
|
|
}
|
|
}
|
|
|
|
struct _s_x _port_name[] = {
|
|
{"dst-port", O_IP_DSTPORT},
|
|
{"src-port", O_IP_SRCPORT},
|
|
{"ipid", O_IPID},
|
|
{"iplen", O_IPLEN},
|
|
{"ipttl", O_IPTTL},
|
|
{"mac-type", O_MAC_TYPE},
|
|
{"tcpdatalen", O_TCPDATALEN},
|
|
{NULL, 0}
|
|
};
|
|
|
|
/*
|
|
* Print the values in a list 16-bit items of the types above.
|
|
* XXX todo: add support for mask.
|
|
*/
|
|
static void
|
|
print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
|
|
{
|
|
uint16_t *p = cmd->ports;
|
|
int i;
|
|
char const *sep;
|
|
|
|
if (cmd->o.len & F_NOT)
|
|
printf(" not");
|
|
if (opcode != 0) {
|
|
sep = match_value(_port_name, opcode);
|
|
if (sep == NULL)
|
|
sep = "???";
|
|
printf (" %s", sep);
|
|
}
|
|
sep = " ";
|
|
for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
|
|
printf(sep);
|
|
print_port(proto, p[0]);
|
|
if (p[0] != p[1]) {
|
|
printf("-");
|
|
print_port(proto, p[1]);
|
|
}
|
|
sep = ",";
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Like strtol, but also translates service names into port numbers
|
|
* for some protocols.
|
|
* In particular:
|
|
* proto == -1 disables the protocol check;
|
|
* proto == IPPROTO_ETHERTYPE looks up an internal table
|
|
* proto == <some value in /etc/protocols> matches the values there.
|
|
* Returns *end == s in case the parameter is not found.
|
|
*/
|
|
static int
|
|
strtoport(char *s, char **end, int base, int proto)
|
|
{
|
|
char *p, *buf;
|
|
char *s1;
|
|
int i;
|
|
|
|
*end = s; /* default - not found */
|
|
if (*s == '\0')
|
|
return 0; /* not found */
|
|
|
|
if (isdigit(*s))
|
|
return strtol(s, end, base);
|
|
|
|
/*
|
|
* find separator. '\\' escapes the next char.
|
|
*/
|
|
for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
|
|
if (*s1 == '\\' && s1[1] != '\0')
|
|
s1++;
|
|
|
|
buf = malloc(s1 - s + 1);
|
|
if (buf == NULL)
|
|
return 0;
|
|
|
|
/*
|
|
* copy into a buffer skipping backslashes
|
|
*/
|
|
for (p = s, i = 0; p != s1 ; p++)
|
|
if (*p != '\\')
|
|
buf[i++] = *p;
|
|
buf[i++] = '\0';
|
|
|
|
if (proto == IPPROTO_ETHERTYPE) {
|
|
i = match_token(ether_types, buf);
|
|
free(buf);
|
|
if (i != -1) { /* found */
|
|
*end = s1;
|
|
return i;
|
|
}
|
|
} else {
|
|
struct protoent *pe = NULL;
|
|
struct servent *se;
|
|
|
|
if (proto != 0)
|
|
pe = getprotobynumber(proto);
|
|
setservent(1);
|
|
se = getservbyname(buf, pe ? pe->p_name : NULL);
|
|
free(buf);
|
|
if (se != NULL) {
|
|
*end = s1;
|
|
return ntohs(se->s_port);
|
|
}
|
|
}
|
|
return 0; /* not found */
|
|
}
|
|
|
|
/*
|
|
* Map between current altq queue id numbers and names.
|
|
*/
|
|
static int altq_fetched = 0;
|
|
static TAILQ_HEAD(, pf_altq) altq_entries =
|
|
TAILQ_HEAD_INITIALIZER(altq_entries);
|
|
|
|
static void
|
|
altq_set_enabled(int enabled)
|
|
{
|
|
int pffd;
|
|
|
|
pffd = open("/dev/pf", O_RDWR);
|
|
if (pffd == -1)
|
|
err(EX_UNAVAILABLE,
|
|
"altq support opening pf(4) control device");
|
|
if (enabled) {
|
|
if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST)
|
|
err(EX_UNAVAILABLE, "enabling altq");
|
|
} else {
|
|
if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT)
|
|
err(EX_UNAVAILABLE, "disabling altq");
|
|
}
|
|
close(pffd);
|
|
}
|
|
|
|
static void
|
|
altq_fetch()
|
|
{
|
|
struct pfioc_altq pfioc;
|
|
struct pf_altq *altq;
|
|
int pffd, mnr;
|
|
|
|
if (altq_fetched)
|
|
return;
|
|
altq_fetched = 1;
|
|
pffd = open("/dev/pf", O_RDONLY);
|
|
if (pffd == -1) {
|
|
warn("altq support opening pf(4) control device");
|
|
return;
|
|
}
|
|
bzero(&pfioc, sizeof(pfioc));
|
|
if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) {
|
|
warn("altq support getting queue list");
|
|
close(pffd);
|
|
return;
|
|
}
|
|
mnr = pfioc.nr;
|
|
for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) {
|
|
if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) {
|
|
if (errno == EBUSY)
|
|
break;
|
|
warn("altq support getting queue list");
|
|
close(pffd);
|
|
return;
|
|
}
|
|
if (pfioc.altq.qid == 0)
|
|
continue;
|
|
altq = malloc(sizeof(*altq));
|
|
if (altq == NULL)
|
|
err(EX_OSERR, "malloc");
|
|
*altq = pfioc.altq;
|
|
TAILQ_INSERT_TAIL(&altq_entries, altq, entries);
|
|
}
|
|
close(pffd);
|
|
}
|
|
|
|
static u_int32_t
|
|
altq_name_to_qid(const char *name)
|
|
{
|
|
struct pf_altq *altq;
|
|
|
|
altq_fetch();
|
|
TAILQ_FOREACH(altq, &altq_entries, entries)
|
|
if (strcmp(name, altq->qname) == 0)
|
|
break;
|
|
if (altq == NULL)
|
|
errx(EX_DATAERR, "altq has no queue named `%s'", name);
|
|
return altq->qid;
|
|
}
|
|
|
|
static const char *
|
|
altq_qid_to_name(u_int32_t qid)
|
|
{
|
|
struct pf_altq *altq;
|
|
|
|
altq_fetch();
|
|
TAILQ_FOREACH(altq, &altq_entries, entries)
|
|
if (qid == altq->qid)
|
|
break;
|
|
if (altq == NULL)
|
|
return NULL;
|
|
return altq->qname;
|
|
}
|
|
|
|
static void
|
|
fill_altq_qid(u_int32_t *qid, const char *av)
|
|
{
|
|
*qid = altq_name_to_qid(av);
|
|
}
|
|
|
|
/*
|
|
* Fill the body of the command with the list of port ranges.
|
|
*/
|
|
static int
|
|
fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
|
|
{
|
|
uint16_t a, b, *p = cmd->ports;
|
|
int i = 0;
|
|
char *s = av;
|
|
|
|
while (*s) {
|
|
a = strtoport(av, &s, 0, proto);
|
|
if (s == av) /* no parameter */
|
|
break;
|
|
if (*s == '-') { /* a range */
|
|
av = s+1;
|
|
b = strtoport(av, &s, 0, proto);
|
|
if (s == av) /* no parameter */
|
|
break;
|
|
p[0] = a;
|
|
p[1] = b;
|
|
} else if (*s == ',' || *s == '\0' )
|
|
p[0] = p[1] = a;
|
|
else /* invalid separator */
|
|
errx(EX_DATAERR, "invalid separator <%c> in <%s>\n",
|
|
*s, av);
|
|
i++;
|
|
p += 2;
|
|
av = s+1;
|
|
}
|
|
if (i > 0) {
|
|
if (i+1 > F_LEN_MASK)
|
|
errx(EX_DATAERR, "too many ports/ranges\n");
|
|
cmd->o.len |= i+1; /* leave F_NOT and F_OR untouched */
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static struct _s_x icmpcodes[] = {
|
|
{ "net", ICMP_UNREACH_NET },
|
|
{ "host", ICMP_UNREACH_HOST },
|
|
{ "protocol", ICMP_UNREACH_PROTOCOL },
|
|
{ "port", ICMP_UNREACH_PORT },
|
|
{ "needfrag", ICMP_UNREACH_NEEDFRAG },
|
|
{ "srcfail", ICMP_UNREACH_SRCFAIL },
|
|
{ "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
|
|
{ "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
|
|
{ "isolated", ICMP_UNREACH_ISOLATED },
|
|
{ "net-prohib", ICMP_UNREACH_NET_PROHIB },
|
|
{ "host-prohib", ICMP_UNREACH_HOST_PROHIB },
|
|
{ "tosnet", ICMP_UNREACH_TOSNET },
|
|
{ "toshost", ICMP_UNREACH_TOSHOST },
|
|
{ "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
|
|
{ "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
|
|
{ "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static void
|
|
fill_reject_code(u_short *codep, char *str)
|
|
{
|
|
int val;
|
|
char *s;
|
|
|
|
val = strtoul(str, &s, 0);
|
|
if (s == str || *s != '\0' || val >= 0x100)
|
|
val = match_token(icmpcodes, str);
|
|
if (val < 0)
|
|
errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
|
|
*codep = val;
|
|
return;
|
|
}
|
|
|
|
static void
|
|
print_reject_code(uint16_t code)
|
|
{
|
|
char const *s = match_value(icmpcodes, code);
|
|
|
|
if (s != NULL)
|
|
printf("unreach %s", s);
|
|
else
|
|
printf("unreach %u", code);
|
|
}
|
|
|
|
/*
|
|
* Returns the number of bits set (from left) in a contiguous bitmask,
|
|
* or -1 if the mask is not contiguous.
|
|
* XXX this needs a proper fix.
|
|
* This effectively works on masks in big-endian (network) format.
|
|
* when compiled on little endian architectures.
|
|
*
|
|
* First bit is bit 7 of the first byte -- note, for MAC addresses,
|
|
* the first bit on the wire is bit 0 of the first byte.
|
|
* len is the max length in bits.
|
|
*/
|
|
static int
|
|
contigmask(uint8_t *p, int len)
|
|
{
|
|
int i, n;
|
|
|
|
for (i=0; i<len ; i++)
|
|
if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
|
|
break;
|
|
for (n=i+1; n < len; n++)
|
|
if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
|
|
return -1; /* mask not contiguous */
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* print flags set/clear in the two bitmasks passed as parameters.
|
|
* There is a specialized check for f_tcpflags.
|
|
*/
|
|
static void
|
|
print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
|
|
{
|
|
char const *comma = "";
|
|
int i;
|
|
uint8_t set = cmd->arg1 & 0xff;
|
|
uint8_t clear = (cmd->arg1 >> 8) & 0xff;
|
|
|
|
if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
|
|
printf(" setup");
|
|
return;
|
|
}
|
|
|
|
printf(" %s ", name);
|
|
for (i=0; list[i].x != 0; i++) {
|
|
if (set & list[i].x) {
|
|
set &= ~list[i].x;
|
|
printf("%s%s", comma, list[i].s);
|
|
comma = ",";
|
|
}
|
|
if (clear & list[i].x) {
|
|
clear &= ~list[i].x;
|
|
printf("%s!%s", comma, list[i].s);
|
|
comma = ",";
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print the ip address contained in a command.
|
|
*/
|
|
static void
|
|
print_ip(ipfw_insn_ip *cmd, char const *s)
|
|
{
|
|
struct hostent *he = NULL;
|
|
int len = F_LEN((ipfw_insn *)cmd);
|
|
uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
|
|
|
|
printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
|
|
|
|
if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
|
|
printf("me");
|
|
return;
|
|
}
|
|
if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
|
|
cmd->o.opcode == O_IP_DST_LOOKUP) {
|
|
printf("table(%u", ((ipfw_insn *)cmd)->arg1);
|
|
if (len == F_INSN_SIZE(ipfw_insn_u32))
|
|
printf(",%u", *a);
|
|
printf(")");
|
|
return;
|
|
}
|
|
if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
|
|
uint32_t x, *map = (uint32_t *)&(cmd->mask);
|
|
int i, j;
|
|
char comma = '{';
|
|
|
|
x = cmd->o.arg1 - 1;
|
|
x = htonl( ~x );
|
|
cmd->addr.s_addr = htonl(cmd->addr.s_addr);
|
|
printf("%s/%d", inet_ntoa(cmd->addr),
|
|
contigmask((uint8_t *)&x, 32));
|
|
x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
|
|
x &= 0xff; /* base */
|
|
/*
|
|
* Print bits and ranges.
|
|
* Locate first bit set (i), then locate first bit unset (j).
|
|
* If we have 3+ consecutive bits set, then print them as a
|
|
* range, otherwise only print the initial bit and rescan.
|
|
*/
|
|
for (i=0; i < cmd->o.arg1; i++)
|
|
if (map[i/32] & (1<<(i & 31))) {
|
|
for (j=i+1; j < cmd->o.arg1; j++)
|
|
if (!(map[ j/32] & (1<<(j & 31))))
|
|
break;
|
|
printf("%c%d", comma, i+x);
|
|
if (j>i+2) { /* range has at least 3 elements */
|
|
printf("-%d", j-1+x);
|
|
i = j-1;
|
|
}
|
|
comma = ',';
|
|
}
|
|
printf("}");
|
|
return;
|
|
}
|
|
/*
|
|
* len == 2 indicates a single IP, whereas lists of 1 or more
|
|
* addr/mask pairs have len = (2n+1). We convert len to n so we
|
|
* use that to count the number of entries.
|
|
*/
|
|
for (len = len / 2; len > 0; len--, a += 2) {
|
|
int mb = /* mask length */
|
|
(cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
|
|
32 : contigmask((uint8_t *)&(a[1]), 32);
|
|
if (mb == 32 && do_resolv)
|
|
he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
|
|
if (he != NULL) /* resolved to name */
|
|
printf("%s", he->h_name);
|
|
else if (mb == 0) /* any */
|
|
printf("any");
|
|
else { /* numeric IP followed by some kind of mask */
|
|
printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
|
|
if (mb < 0)
|
|
printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
|
|
else if (mb < 32)
|
|
printf("/%d", mb);
|
|
}
|
|
if (len > 1)
|
|
printf(",");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* prints a MAC address/mask pair
|
|
*/
|
|
static void
|
|
print_mac(uint8_t *addr, uint8_t *mask)
|
|
{
|
|
int l = contigmask(mask, 48);
|
|
|
|
if (l == 0)
|
|
printf(" any");
|
|
else {
|
|
printf(" %02x:%02x:%02x:%02x:%02x:%02x",
|
|
addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
|
|
if (l == -1)
|
|
printf("&%02x:%02x:%02x:%02x:%02x:%02x",
|
|
mask[0], mask[1], mask[2],
|
|
mask[3], mask[4], mask[5]);
|
|
else if (l < 48)
|
|
printf("/%d", l);
|
|
}
|
|
}
|
|
|
|
static void
|
|
fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
|
|
{
|
|
uint8_t type;
|
|
|
|
cmd->d[0] = 0;
|
|
while (*av) {
|
|
if (*av == ',')
|
|
av++;
|
|
|
|
type = strtoul(av, &av, 0);
|
|
|
|
if (*av != ',' && *av != '\0')
|
|
errx(EX_DATAERR, "invalid ICMP type");
|
|
|
|
if (type > 31)
|
|
errx(EX_DATAERR, "ICMP type out of range");
|
|
|
|
cmd->d[0] |= 1 << type;
|
|
}
|
|
cmd->o.opcode = O_ICMPTYPE;
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
|
|
}
|
|
|
|
static void
|
|
print_icmptypes(ipfw_insn_u32 *cmd)
|
|
{
|
|
int i;
|
|
char sep= ' ';
|
|
|
|
printf(" icmptypes");
|
|
for (i = 0; i < 32; i++) {
|
|
if ( (cmd->d[0] & (1 << (i))) == 0)
|
|
continue;
|
|
printf("%c%d", sep, i);
|
|
sep = ',';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* show_ipfw() prints the body of an ipfw rule.
|
|
* Because the standard rule has at least proto src_ip dst_ip, we use
|
|
* a helper function to produce these entries if not provided explicitly.
|
|
* The first argument is the list of fields we have, the second is
|
|
* the list of fields we want to be printed.
|
|
*
|
|
* Special cases if we have provided a MAC header:
|
|
* + if the rule does not contain IP addresses/ports, do not print them;
|
|
* + if the rule does not contain an IP proto, print "all" instead of "ip";
|
|
*
|
|
* Once we have 'have_options', IP header fields are printed as options.
|
|
*/
|
|
#define HAVE_PROTO 0x0001
|
|
#define HAVE_SRCIP 0x0002
|
|
#define HAVE_DSTIP 0x0004
|
|
#define HAVE_MAC 0x0008
|
|
#define HAVE_MACTYPE 0x0010
|
|
#define HAVE_OPTIONS 0x8000
|
|
|
|
#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
|
|
static void
|
|
show_prerequisites(int *flags, int want, int cmd)
|
|
{
|
|
if (comment_only)
|
|
return;
|
|
if ( (*flags & HAVE_IP) == HAVE_IP)
|
|
*flags |= HAVE_OPTIONS;
|
|
|
|
if ( (*flags & (HAVE_MAC|HAVE_MACTYPE|HAVE_OPTIONS)) == HAVE_MAC &&
|
|
cmd != O_MAC_TYPE) {
|
|
/*
|
|
* mac-type was optimized out by the compiler,
|
|
* restore it
|
|
*/
|
|
printf(" any");
|
|
*flags |= HAVE_MACTYPE | HAVE_OPTIONS;
|
|
return;
|
|
}
|
|
if ( !(*flags & HAVE_OPTIONS)) {
|
|
if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO))
|
|
printf(" ip");
|
|
if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
|
|
printf(" from any");
|
|
if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
|
|
printf(" to any");
|
|
}
|
|
*flags |= want;
|
|
}
|
|
|
|
static void
|
|
show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
|
|
{
|
|
static int twidth = 0;
|
|
int l;
|
|
ipfw_insn *cmd;
|
|
char *comment = NULL; /* ptr to comment if we have one */
|
|
int proto = 0; /* default */
|
|
int flags = 0; /* prerequisites */
|
|
ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
|
|
ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
|
|
int or_block = 0; /* we are in an or block */
|
|
uint32_t set_disable;
|
|
|
|
bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
|
|
|
|
if (set_disable & (1 << rule->set)) { /* disabled */
|
|
if (!show_sets)
|
|
return;
|
|
else
|
|
printf("# DISABLED ");
|
|
}
|
|
printf("%05u ", rule->rulenum);
|
|
|
|
if (pcwidth>0 || bcwidth>0)
|
|
printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
|
|
bcwidth, align_uint64(&rule->bcnt));
|
|
|
|
if (do_time == 2)
|
|
printf("%10u ", rule->timestamp);
|
|
else if (do_time == 1) {
|
|
char timestr[30];
|
|
time_t t = (time_t)0;
|
|
|
|
if (twidth == 0) {
|
|
strcpy(timestr, ctime(&t));
|
|
*strchr(timestr, '\n') = '\0';
|
|
twidth = strlen(timestr);
|
|
}
|
|
if (rule->timestamp) {
|
|
#if _FreeBSD_version < 500000 /* XXX check */
|
|
#define _long_to_time(x) (time_t)(x)
|
|
#endif
|
|
t = _long_to_time(rule->timestamp);
|
|
|
|
strcpy(timestr, ctime(&t));
|
|
*strchr(timestr, '\n') = '\0';
|
|
printf("%s ", timestr);
|
|
} else {
|
|
printf("%*s", twidth, " ");
|
|
}
|
|
}
|
|
|
|
if (show_sets)
|
|
printf("set %d ", rule->set);
|
|
|
|
/*
|
|
* print the optional "match probability"
|
|
*/
|
|
if (rule->cmd_len > 0) {
|
|
cmd = rule->cmd ;
|
|
if (cmd->opcode == O_PROB) {
|
|
ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
|
|
double d = 1.0 * p->d[0];
|
|
|
|
d = (d / 0x7fffffff);
|
|
printf("prob %f ", d);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* first print actions
|
|
*/
|
|
for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
|
|
l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
|
|
switch(cmd->opcode) {
|
|
case O_CHECK_STATE:
|
|
printf("check-state");
|
|
flags = HAVE_IP; /* avoid printing anything else */
|
|
break;
|
|
|
|
case O_ACCEPT:
|
|
printf("allow");
|
|
break;
|
|
|
|
case O_COUNT:
|
|
printf("count");
|
|
break;
|
|
|
|
case O_DENY:
|
|
printf("deny");
|
|
break;
|
|
|
|
case O_REJECT:
|
|
if (cmd->arg1 == ICMP_REJECT_RST)
|
|
printf("reset");
|
|
else if (cmd->arg1 == ICMP_UNREACH_HOST)
|
|
printf("reject");
|
|
else
|
|
print_reject_code(cmd->arg1);
|
|
break;
|
|
|
|
case O_SKIPTO:
|
|
printf("skipto %u", cmd->arg1);
|
|
break;
|
|
|
|
case O_PIPE:
|
|
printf("pipe %u", cmd->arg1);
|
|
break;
|
|
|
|
case O_QUEUE:
|
|
printf("queue %u", cmd->arg1);
|
|
break;
|
|
|
|
case O_DIVERT:
|
|
printf("divert %u", cmd->arg1);
|
|
break;
|
|
|
|
case O_TEE:
|
|
printf("tee %u", cmd->arg1);
|
|
break;
|
|
|
|
case O_FORWARD_IP:
|
|
{
|
|
ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
|
|
|
|
printf("fwd %s", inet_ntoa(s->sa.sin_addr));
|
|
if (s->sa.sin_port)
|
|
printf(",%d", s->sa.sin_port);
|
|
}
|
|
break;
|
|
|
|
case O_LOG: /* O_LOG is printed last */
|
|
logptr = (ipfw_insn_log *)cmd;
|
|
break;
|
|
|
|
case O_ALTQ: /* O_ALTQ is printed after O_LOG */
|
|
altqptr = (ipfw_insn_altq *)cmd;
|
|
break;
|
|
|
|
default:
|
|
printf("** unrecognized action %d len %d ",
|
|
cmd->opcode, cmd->len);
|
|
}
|
|
}
|
|
if (logptr) {
|
|
if (logptr->max_log > 0)
|
|
printf(" log logamount %d", logptr->max_log);
|
|
else
|
|
printf(" log");
|
|
}
|
|
if (altqptr) {
|
|
const char *qname;
|
|
|
|
qname = altq_qid_to_name(altqptr->qid);
|
|
if (qname == NULL)
|
|
printf(" altq ?<%u>", altqptr->qid);
|
|
else
|
|
printf(" altq %s", qname);
|
|
}
|
|
|
|
/*
|
|
* then print the body.
|
|
*/
|
|
if (rule->_pad & 1) { /* empty rules before options */
|
|
if (!do_compact)
|
|
printf(" ip from any to any");
|
|
flags |= HAVE_IP | HAVE_OPTIONS;
|
|
}
|
|
|
|
if (comment_only)
|
|
comment = "...";
|
|
|
|
for (l = rule->act_ofs, cmd = rule->cmd ;
|
|
l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
|
|
/* useful alias */
|
|
ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
|
|
|
|
if (comment_only) {
|
|
if (cmd->opcode != O_NOP)
|
|
continue;
|
|
printf(" // %s\n", (char *)(cmd + 1));
|
|
return;
|
|
}
|
|
|
|
show_prerequisites(&flags, 0, cmd->opcode);
|
|
|
|
switch(cmd->opcode) {
|
|
case O_PROB:
|
|
break; /* done already */
|
|
|
|
case O_PROBE_STATE:
|
|
break; /* no need to print anything here */
|
|
|
|
case O_MACADDR2: {
|
|
ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
|
|
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
if (cmd->len & F_NOT)
|
|
printf(" not");
|
|
printf(" MAC");
|
|
flags |= HAVE_MAC;
|
|
print_mac(m->addr, m->mask);
|
|
print_mac(m->addr + 6, m->mask + 6);
|
|
}
|
|
break;
|
|
|
|
case O_MAC_TYPE:
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
print_newports((ipfw_insn_u16 *)cmd, IPPROTO_ETHERTYPE,
|
|
(flags & HAVE_OPTIONS) ? cmd->opcode : 0);
|
|
flags |= HAVE_MAC | HAVE_MACTYPE | HAVE_OPTIONS;
|
|
break;
|
|
|
|
case O_IP_SRC:
|
|
case O_IP_SRC_LOOKUP:
|
|
case O_IP_SRC_MASK:
|
|
case O_IP_SRC_ME:
|
|
case O_IP_SRC_SET:
|
|
show_prerequisites(&flags, HAVE_PROTO, 0);
|
|
if (!(flags & HAVE_SRCIP))
|
|
printf(" from");
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
print_ip((ipfw_insn_ip *)cmd,
|
|
(flags & HAVE_OPTIONS) ? " src-ip" : "");
|
|
flags |= HAVE_SRCIP;
|
|
break;
|
|
|
|
case O_IP_DST:
|
|
case O_IP_DST_LOOKUP:
|
|
case O_IP_DST_MASK:
|
|
case O_IP_DST_ME:
|
|
case O_IP_DST_SET:
|
|
show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
|
|
if (!(flags & HAVE_DSTIP))
|
|
printf(" to");
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
print_ip((ipfw_insn_ip *)cmd,
|
|
(flags & HAVE_OPTIONS) ? " dst-ip" : "");
|
|
flags |= HAVE_DSTIP;
|
|
break;
|
|
|
|
case O_IP_DSTPORT:
|
|
show_prerequisites(&flags, HAVE_IP, 0);
|
|
case O_IP_SRCPORT:
|
|
show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
print_newports((ipfw_insn_u16 *)cmd, proto,
|
|
(flags & HAVE_OPTIONS) ? cmd->opcode : 0);
|
|
break;
|
|
|
|
case O_PROTO: {
|
|
struct protoent *pe;
|
|
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
if (cmd->len & F_NOT)
|
|
printf(" not");
|
|
proto = cmd->arg1;
|
|
pe = getprotobynumber(cmd->arg1);
|
|
if (flags & HAVE_OPTIONS)
|
|
printf(" proto");
|
|
if (pe)
|
|
printf(" %s", pe->p_name);
|
|
else
|
|
printf(" %u", cmd->arg1);
|
|
}
|
|
flags |= HAVE_PROTO;
|
|
break;
|
|
|
|
default: /*options ... */
|
|
show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
|
|
if ((cmd->len & F_OR) && !or_block)
|
|
printf(" {");
|
|
if (cmd->len & F_NOT && cmd->opcode != O_IN)
|
|
printf(" not");
|
|
switch(cmd->opcode) {
|
|
case O_FRAG:
|
|
printf(" frag");
|
|
break;
|
|
|
|
case O_IN:
|
|
printf(cmd->len & F_NOT ? " out" : " in");
|
|
break;
|
|
|
|
case O_DIVERTED:
|
|
switch (cmd->arg1) {
|
|
case 3:
|
|
printf(" diverted");
|
|
break;
|
|
case 1:
|
|
printf(" diverted-loopback");
|
|
break;
|
|
case 2:
|
|
printf(" diverted-output");
|
|
break;
|
|
default:
|
|
printf(" diverted-?<%u>", cmd->arg1);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case O_LAYER2:
|
|
printf(" layer2");
|
|
break;
|
|
case O_XMIT:
|
|
case O_RECV:
|
|
case O_VIA: {
|
|
char const *s;
|
|
ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
|
|
|
|
if (cmd->opcode == O_XMIT)
|
|
s = "xmit";
|
|
else if (cmd->opcode == O_RECV)
|
|
s = "recv";
|
|
else /* if (cmd->opcode == O_VIA) */
|
|
s = "via";
|
|
if (cmdif->name[0] == '\0')
|
|
printf(" %s %s", s,
|
|
inet_ntoa(cmdif->p.ip));
|
|
printf(" %s %s", s, cmdif->name);
|
|
}
|
|
break;
|
|
|
|
case O_IPID:
|
|
if (F_LEN(cmd) == 1)
|
|
printf(" ipid %u", cmd->arg1 );
|
|
else
|
|
print_newports((ipfw_insn_u16 *)cmd, 0,
|
|
O_IPID);
|
|
break;
|
|
|
|
case O_IPTTL:
|
|
if (F_LEN(cmd) == 1)
|
|
printf(" ipttl %u", cmd->arg1 );
|
|
else
|
|
print_newports((ipfw_insn_u16 *)cmd, 0,
|
|
O_IPTTL);
|
|
break;
|
|
|
|
case O_IPVER:
|
|
printf(" ipver %u", cmd->arg1 );
|
|
break;
|
|
|
|
case O_IPPRECEDENCE:
|
|
printf(" ipprecedence %u", (cmd->arg1) >> 5 );
|
|
break;
|
|
|
|
case O_IPLEN:
|
|
if (F_LEN(cmd) == 1)
|
|
printf(" iplen %u", cmd->arg1 );
|
|
else
|
|
print_newports((ipfw_insn_u16 *)cmd, 0,
|
|
O_IPLEN);
|
|
break;
|
|
|
|
case O_IPOPT:
|
|
print_flags("ipoptions", cmd, f_ipopts);
|
|
break;
|
|
|
|
case O_IPTOS:
|
|
print_flags("iptos", cmd, f_iptos);
|
|
break;
|
|
|
|
case O_ICMPTYPE:
|
|
print_icmptypes((ipfw_insn_u32 *)cmd);
|
|
break;
|
|
|
|
case O_ESTAB:
|
|
printf(" established");
|
|
break;
|
|
|
|
case O_TCPDATALEN:
|
|
if (F_LEN(cmd) == 1)
|
|
printf(" tcpdatalen %u", cmd->arg1 );
|
|
else
|
|
print_newports((ipfw_insn_u16 *)cmd, 0,
|
|
O_TCPDATALEN);
|
|
break;
|
|
|
|
case O_TCPFLAGS:
|
|
print_flags("tcpflags", cmd, f_tcpflags);
|
|
break;
|
|
|
|
case O_TCPOPTS:
|
|
print_flags("tcpoptions", cmd, f_tcpopts);
|
|
break;
|
|
|
|
case O_TCPWIN:
|
|
printf(" tcpwin %d", ntohs(cmd->arg1));
|
|
break;
|
|
|
|
case O_TCPACK:
|
|
printf(" tcpack %d", ntohl(cmd32->d[0]));
|
|
break;
|
|
|
|
case O_TCPSEQ:
|
|
printf(" tcpseq %d", ntohl(cmd32->d[0]));
|
|
break;
|
|
|
|
case O_UID:
|
|
{
|
|
struct passwd *pwd = getpwuid(cmd32->d[0]);
|
|
|
|
if (pwd)
|
|
printf(" uid %s", pwd->pw_name);
|
|
else
|
|
printf(" uid %u", cmd32->d[0]);
|
|
}
|
|
break;
|
|
|
|
case O_GID:
|
|
{
|
|
struct group *grp = getgrgid(cmd32->d[0]);
|
|
|
|
if (grp)
|
|
printf(" gid %s", grp->gr_name);
|
|
else
|
|
printf(" gid %u", cmd32->d[0]);
|
|
}
|
|
break;
|
|
|
|
case O_JAIL:
|
|
printf(" jail %d", cmd32->d[0]);
|
|
break;
|
|
|
|
case O_VERREVPATH:
|
|
printf(" verrevpath");
|
|
break;
|
|
|
|
case O_VERSRCREACH:
|
|
printf(" versrcreach");
|
|
break;
|
|
|
|
case O_ANTISPOOF:
|
|
printf(" antispoof");
|
|
break;
|
|
|
|
case O_IPSEC:
|
|
printf(" ipsec");
|
|
break;
|
|
|
|
case O_NOP:
|
|
comment = (char *)(cmd + 1);
|
|
break;
|
|
|
|
case O_KEEP_STATE:
|
|
printf(" keep-state");
|
|
break;
|
|
|
|
case O_LIMIT:
|
|
{
|
|
struct _s_x *p = limit_masks;
|
|
ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
|
|
uint8_t x = c->limit_mask;
|
|
char const *comma = " ";
|
|
|
|
printf(" limit");
|
|
for (; p->x != 0 ; p++)
|
|
if ((x & p->x) == p->x) {
|
|
x &= ~p->x;
|
|
printf("%s%s", comma, p->s);
|
|
comma = ",";
|
|
}
|
|
printf(" %d", c->conn_limit);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
printf(" [opcode %d len %d]",
|
|
cmd->opcode, cmd->len);
|
|
}
|
|
}
|
|
if (cmd->len & F_OR) {
|
|
printf(" or");
|
|
or_block = 1;
|
|
} else if (or_block) {
|
|
printf(" }");
|
|
or_block = 0;
|
|
}
|
|
}
|
|
show_prerequisites(&flags, HAVE_IP, 0);
|
|
if (comment)
|
|
printf(" // %s", comment);
|
|
printf("\n");
|
|
}
|
|
|
|
static void
|
|
show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
|
|
{
|
|
struct protoent *pe;
|
|
struct in_addr a;
|
|
uint16_t rulenum;
|
|
|
|
if (!do_expired) {
|
|
if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
|
|
return;
|
|
}
|
|
bcopy(&d->rule, &rulenum, sizeof(rulenum));
|
|
printf("%05d", rulenum);
|
|
if (pcwidth>0 || bcwidth>0)
|
|
printf(" %*llu %*llu (%ds)", pcwidth,
|
|
align_uint64(&d->pcnt), bcwidth,
|
|
align_uint64(&d->bcnt), d->expire);
|
|
switch (d->dyn_type) {
|
|
case O_LIMIT_PARENT:
|
|
printf(" PARENT %d", d->count);
|
|
break;
|
|
case O_LIMIT:
|
|
printf(" LIMIT");
|
|
break;
|
|
case O_KEEP_STATE: /* bidir, no mask */
|
|
printf(" STATE");
|
|
break;
|
|
}
|
|
|
|
if ((pe = getprotobynumber(d->id.proto)) != NULL)
|
|
printf(" %s", pe->p_name);
|
|
else
|
|
printf(" proto %u", d->id.proto);
|
|
|
|
a.s_addr = htonl(d->id.src_ip);
|
|
printf(" %s %d", inet_ntoa(a), d->id.src_port);
|
|
|
|
a.s_addr = htonl(d->id.dst_ip);
|
|
printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
|
|
printf("\n");
|
|
}
|
|
|
|
static int
|
|
sort_q(const void *pa, const void *pb)
|
|
{
|
|
int rev = (do_sort < 0);
|
|
int field = rev ? -do_sort : do_sort;
|
|
long long res = 0;
|
|
const struct dn_flow_queue *a = pa;
|
|
const struct dn_flow_queue *b = pb;
|
|
|
|
switch (field) {
|
|
case 1: /* pkts */
|
|
res = a->len - b->len;
|
|
break;
|
|
case 2: /* bytes */
|
|
res = a->len_bytes - b->len_bytes;
|
|
break;
|
|
|
|
case 3: /* tot pkts */
|
|
res = a->tot_pkts - b->tot_pkts;
|
|
break;
|
|
|
|
case 4: /* tot bytes */
|
|
res = a->tot_bytes - b->tot_bytes;
|
|
break;
|
|
}
|
|
if (res < 0)
|
|
res = -1;
|
|
if (res > 0)
|
|
res = 1;
|
|
return (int)(rev ? res : -res);
|
|
}
|
|
|
|
static void
|
|
list_queues(struct dn_flow_set *fs, struct dn_flow_queue *q)
|
|
{
|
|
int l;
|
|
|
|
printf(" mask: 0x%02x 0x%08x/0x%04x -> 0x%08x/0x%04x\n",
|
|
fs->flow_mask.proto,
|
|
fs->flow_mask.src_ip, fs->flow_mask.src_port,
|
|
fs->flow_mask.dst_ip, fs->flow_mask.dst_port);
|
|
if (fs->rq_elements == 0)
|
|
return;
|
|
|
|
printf("BKT Prot ___Source IP/port____ "
|
|
"____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp\n");
|
|
if (do_sort != 0)
|
|
heapsort(q, fs->rq_elements, sizeof *q, sort_q);
|
|
for (l = 0; l < fs->rq_elements; l++) {
|
|
struct in_addr ina;
|
|
struct protoent *pe;
|
|
|
|
ina.s_addr = htonl(q[l].id.src_ip);
|
|
printf("%3d ", q[l].hash_slot);
|
|
pe = getprotobynumber(q[l].id.proto);
|
|
if (pe)
|
|
printf("%-4s ", pe->p_name);
|
|
else
|
|
printf("%4u ", q[l].id.proto);
|
|
printf("%15s/%-5d ",
|
|
inet_ntoa(ina), q[l].id.src_port);
|
|
ina.s_addr = htonl(q[l].id.dst_ip);
|
|
printf("%15s/%-5d ",
|
|
inet_ntoa(ina), q[l].id.dst_port);
|
|
printf("%4qu %8qu %2u %4u %3u\n",
|
|
q[l].tot_pkts, q[l].tot_bytes,
|
|
q[l].len, q[l].len_bytes, q[l].drops);
|
|
if (verbose)
|
|
printf(" S %20qd F %20qd\n",
|
|
q[l].S, q[l].F);
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_flowset_parms(struct dn_flow_set *fs, char *prefix)
|
|
{
|
|
int l;
|
|
char qs[30];
|
|
char plr[30];
|
|
char red[90]; /* Display RED parameters */
|
|
|
|
l = fs->qsize;
|
|
if (fs->flags_fs & DN_QSIZE_IS_BYTES) {
|
|
if (l >= 8192)
|
|
sprintf(qs, "%d KB", l / 1024);
|
|
else
|
|
sprintf(qs, "%d B", l);
|
|
} else
|
|
sprintf(qs, "%3d sl.", l);
|
|
if (fs->plr)
|
|
sprintf(plr, "plr %f", 1.0 * fs->plr / (double)(0x7fffffff));
|
|
else
|
|
plr[0] = '\0';
|
|
if (fs->flags_fs & DN_IS_RED) /* RED parameters */
|
|
sprintf(red,
|
|
"\n\t %cRED w_q %f min_th %d max_th %d max_p %f",
|
|
(fs->flags_fs & DN_IS_GENTLE_RED) ? 'G' : ' ',
|
|
1.0 * fs->w_q / (double)(1 << SCALE_RED),
|
|
SCALE_VAL(fs->min_th),
|
|
SCALE_VAL(fs->max_th),
|
|
1.0 * fs->max_p / (double)(1 << SCALE_RED));
|
|
else
|
|
sprintf(red, "droptail");
|
|
|
|
printf("%s %s%s %d queues (%d buckets) %s\n",
|
|
prefix, qs, plr, fs->rq_elements, fs->rq_size, red);
|
|
}
|
|
|
|
static void
|
|
list_pipes(void *data, uint nbytes, int ac, char *av[])
|
|
{
|
|
int rulenum;
|
|
void *next = data;
|
|
struct dn_pipe *p = (struct dn_pipe *) data;
|
|
struct dn_flow_set *fs;
|
|
struct dn_flow_queue *q;
|
|
int l;
|
|
|
|
if (ac > 0)
|
|
rulenum = strtoul(*av++, NULL, 10);
|
|
else
|
|
rulenum = 0;
|
|
for (; nbytes >= sizeof *p; p = (struct dn_pipe *)next) {
|
|
double b = p->bandwidth;
|
|
char buf[30];
|
|
char prefix[80];
|
|
|
|
if (p->next != (struct dn_pipe *)DN_IS_PIPE)
|
|
break; /* done with pipes, now queues */
|
|
|
|
/*
|
|
* compute length, as pipe have variable size
|
|
*/
|
|
l = sizeof(*p) + p->fs.rq_elements * sizeof(*q);
|
|
next = (char *)p + l;
|
|
nbytes -= l;
|
|
|
|
if ((rulenum != 0 && rulenum != p->pipe_nr) || do_pipe == 2)
|
|
continue;
|
|
|
|
/*
|
|
* Print rate (or clocking interface)
|
|
*/
|
|
if (p->if_name[0] != '\0')
|
|
sprintf(buf, "%s", p->if_name);
|
|
else if (b == 0)
|
|
sprintf(buf, "unlimited");
|
|
else if (b >= 1000000)
|
|
sprintf(buf, "%7.3f Mbit/s", b/1000000);
|
|
else if (b >= 1000)
|
|
sprintf(buf, "%7.3f Kbit/s", b/1000);
|
|
else
|
|
sprintf(buf, "%7.3f bit/s ", b);
|
|
|
|
sprintf(prefix, "%05d: %s %4d ms ",
|
|
p->pipe_nr, buf, p->delay);
|
|
print_flowset_parms(&(p->fs), prefix);
|
|
if (verbose)
|
|
printf(" V %20qd\n", p->V >> MY_M);
|
|
|
|
q = (struct dn_flow_queue *)(p+1);
|
|
list_queues(&(p->fs), q);
|
|
}
|
|
for (fs = next; nbytes >= sizeof *fs; fs = next) {
|
|
char prefix[80];
|
|
|
|
if (fs->next != (struct dn_flow_set *)DN_IS_QUEUE)
|
|
break;
|
|
l = sizeof(*fs) + fs->rq_elements * sizeof(*q);
|
|
next = (char *)fs + l;
|
|
nbytes -= l;
|
|
|
|
if (rulenum != 0 && ((rulenum != fs->fs_nr && do_pipe == 2) ||
|
|
(rulenum != fs->parent_nr && do_pipe == 1))) {
|
|
continue;
|
|
}
|
|
|
|
q = (struct dn_flow_queue *)(fs+1);
|
|
sprintf(prefix, "q%05d: weight %d pipe %d ",
|
|
fs->fs_nr, fs->weight, fs->parent_nr);
|
|
print_flowset_parms(fs, prefix);
|
|
list_queues(fs, q);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This one handles all set-related commands
|
|
* ipfw set { show | enable | disable }
|
|
* ipfw set swap X Y
|
|
* ipfw set move X to Y
|
|
* ipfw set move rule X to Y
|
|
*/
|
|
static void
|
|
sets_handler(int ac, char *av[])
|
|
{
|
|
uint32_t set_disable, masks[2];
|
|
int i, nbytes;
|
|
uint16_t rulenum;
|
|
uint8_t cmd, new_set;
|
|
|
|
ac--;
|
|
av++;
|
|
|
|
if (!ac)
|
|
errx(EX_USAGE, "set needs command");
|
|
if (_substrcmp(*av, "show") == 0) {
|
|
void *data;
|
|
char const *msg;
|
|
|
|
nbytes = sizeof(struct ip_fw);
|
|
if ((data = calloc(1, nbytes)) == NULL)
|
|
err(EX_OSERR, "calloc");
|
|
if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
|
|
err(EX_OSERR, "getsockopt(IP_FW_GET)");
|
|
bcopy(&((struct ip_fw *)data)->next_rule,
|
|
&set_disable, sizeof(set_disable));
|
|
|
|
for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
|
|
if ((set_disable & (1<<i))) {
|
|
printf("%s %d", msg, i);
|
|
msg = "";
|
|
}
|
|
msg = (set_disable) ? " enable" : "enable";
|
|
for (i = 0; i < RESVD_SET; i++)
|
|
if (!(set_disable & (1<<i))) {
|
|
printf("%s %d", msg, i);
|
|
msg = "";
|
|
}
|
|
printf("\n");
|
|
} else if (_substrcmp(*av, "swap") == 0) {
|
|
ac--; av++;
|
|
if (ac != 2)
|
|
errx(EX_USAGE, "set swap needs 2 set numbers\n");
|
|
rulenum = atoi(av[0]);
|
|
new_set = atoi(av[1]);
|
|
if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
|
|
errx(EX_DATAERR, "invalid set number %s\n", av[0]);
|
|
if (!isdigit(*(av[1])) || new_set > RESVD_SET)
|
|
errx(EX_DATAERR, "invalid set number %s\n", av[1]);
|
|
masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
|
|
i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
|
|
} else if (_substrcmp(*av, "move") == 0) {
|
|
ac--; av++;
|
|
if (ac && _substrcmp(*av, "rule") == 0) {
|
|
cmd = 2;
|
|
ac--; av++;
|
|
} else
|
|
cmd = 3;
|
|
if (ac != 3 || _substrcmp(av[1], "to") != 0)
|
|
errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
|
|
rulenum = atoi(av[0]);
|
|
new_set = atoi(av[2]);
|
|
if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
|
|
(cmd == 2 && rulenum == 65535) )
|
|
errx(EX_DATAERR, "invalid source number %s\n", av[0]);
|
|
if (!isdigit(*(av[2])) || new_set > RESVD_SET)
|
|
errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
|
|
masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
|
|
i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
|
|
} else if (_substrcmp(*av, "disable") == 0 ||
|
|
_substrcmp(*av, "enable") == 0 ) {
|
|
int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
|
|
|
|
ac--; av++;
|
|
masks[0] = masks[1] = 0;
|
|
|
|
while (ac) {
|
|
if (isdigit(**av)) {
|
|
i = atoi(*av);
|
|
if (i < 0 || i > RESVD_SET)
|
|
errx(EX_DATAERR,
|
|
"invalid set number %d\n", i);
|
|
masks[which] |= (1<<i);
|
|
} else if (_substrcmp(*av, "disable") == 0)
|
|
which = 0;
|
|
else if (_substrcmp(*av, "enable") == 0)
|
|
which = 1;
|
|
else
|
|
errx(EX_DATAERR,
|
|
"invalid set command %s\n", *av);
|
|
av++; ac--;
|
|
}
|
|
if ( (masks[0] & masks[1]) != 0 )
|
|
errx(EX_DATAERR,
|
|
"cannot enable and disable the same set\n");
|
|
|
|
i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
|
|
if (i)
|
|
warn("set enable/disable: setsockopt(IP_FW_DEL)");
|
|
} else
|
|
errx(EX_USAGE, "invalid set command %s\n", *av);
|
|
}
|
|
|
|
static void
|
|
sysctl_handler(int ac, char *av[], int which)
|
|
{
|
|
ac--;
|
|
av++;
|
|
|
|
if (ac == 0) {
|
|
warnx("missing keyword to enable/disable\n");
|
|
} else if (_substrcmp(*av, "firewall") == 0) {
|
|
sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
|
|
&which, sizeof(which));
|
|
} else if (_substrcmp(*av, "one_pass") == 0) {
|
|
sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
|
|
&which, sizeof(which));
|
|
} else if (_substrcmp(*av, "debug") == 0) {
|
|
sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
|
|
&which, sizeof(which));
|
|
} else if (_substrcmp(*av, "verbose") == 0) {
|
|
sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
|
|
&which, sizeof(which));
|
|
} else if (_substrcmp(*av, "dyn_keepalive") == 0) {
|
|
sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
|
|
&which, sizeof(which));
|
|
} else if (_substrcmp(*av, "altq") == 0) {
|
|
altq_set_enabled(which);
|
|
} else {
|
|
warnx("unrecognize enable/disable keyword: %s\n", *av);
|
|
}
|
|
}
|
|
|
|
static void
|
|
list(int ac, char *av[], int show_counters)
|
|
{
|
|
struct ip_fw *r;
|
|
ipfw_dyn_rule *dynrules, *d;
|
|
|
|
#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
|
|
char *lim;
|
|
void *data = NULL;
|
|
int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
|
|
int exitval = EX_OK;
|
|
int lac;
|
|
char **lav;
|
|
u_long rnum, last;
|
|
char *endptr;
|
|
int seen = 0;
|
|
|
|
const int ocmd = do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
|
|
int nalloc = 1024; /* start somewhere... */
|
|
|
|
last = 0;
|
|
|
|
if (test_only) {
|
|
fprintf(stderr, "Testing only, list disabled\n");
|
|
return;
|
|
}
|
|
|
|
ac--;
|
|
av++;
|
|
|
|
/* get rules or pipes from kernel, resizing array as necessary */
|
|
nbytes = nalloc;
|
|
|
|
while (nbytes >= nalloc) {
|
|
nalloc = nalloc * 2 + 200;
|
|
nbytes = nalloc;
|
|
if ((data = realloc(data, nbytes)) == NULL)
|
|
err(EX_OSERR, "realloc");
|
|
if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
|
|
err(EX_OSERR, "getsockopt(IP_%s_GET)",
|
|
do_pipe ? "DUMMYNET" : "FW");
|
|
}
|
|
|
|
if (do_pipe) {
|
|
list_pipes(data, nbytes, ac, av);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Count static rules. They have variable size so we
|
|
* need to scan the list to count them.
|
|
*/
|
|
for (nstat = 1, r = data, lim = (char *)data + nbytes;
|
|
r->rulenum < 65535 && (char *)r < lim;
|
|
++nstat, r = NEXT(r) )
|
|
; /* nothing */
|
|
|
|
/*
|
|
* Count dynamic rules. This is easier as they have
|
|
* fixed size.
|
|
*/
|
|
r = NEXT(r);
|
|
dynrules = (ipfw_dyn_rule *)r ;
|
|
n = (char *)r - (char *)data;
|
|
ndyn = (nbytes - n) / sizeof *dynrules;
|
|
|
|
/* if showing stats, figure out column widths ahead of time */
|
|
bcwidth = pcwidth = 0;
|
|
if (show_counters) {
|
|
for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
|
|
/* packet counter */
|
|
width = snprintf(NULL, 0, "%llu",
|
|
align_uint64(&r->pcnt));
|
|
if (width > pcwidth)
|
|
pcwidth = width;
|
|
|
|
/* byte counter */
|
|
width = snprintf(NULL, 0, "%llu",
|
|
align_uint64(&r->bcnt));
|
|
if (width > bcwidth)
|
|
bcwidth = width;
|
|
}
|
|
}
|
|
if (do_dynamic && ndyn) {
|
|
for (n = 0, d = dynrules; n < ndyn; n++, d++) {
|
|
width = snprintf(NULL, 0, "%llu",
|
|
align_uint64(&d->pcnt));
|
|
if (width > pcwidth)
|
|
pcwidth = width;
|
|
|
|
width = snprintf(NULL, 0, "%llu",
|
|
align_uint64(&d->bcnt));
|
|
if (width > bcwidth)
|
|
bcwidth = width;
|
|
}
|
|
}
|
|
/* if no rule numbers were specified, list all rules */
|
|
if (ac == 0) {
|
|
for (n = 0, r = data; n < nstat; n++, r = NEXT(r) )
|
|
show_ipfw(r, pcwidth, bcwidth);
|
|
|
|
if (do_dynamic && ndyn) {
|
|
printf("## Dynamic rules (%d):\n", ndyn);
|
|
for (n = 0, d = dynrules; n < ndyn; n++, d++)
|
|
show_dyn_ipfw(d, pcwidth, bcwidth);
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/* display specific rules requested on command line */
|
|
|
|
for (lac = ac, lav = av; lac != 0; lac--) {
|
|
/* convert command line rule # */
|
|
last = rnum = strtoul(*lav++, &endptr, 10);
|
|
if (*endptr == '-')
|
|
last = strtoul(endptr+1, &endptr, 10);
|
|
if (*endptr) {
|
|
exitval = EX_USAGE;
|
|
warnx("invalid rule number: %s", *(lav - 1));
|
|
continue;
|
|
}
|
|
for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
|
|
if (r->rulenum > last)
|
|
break;
|
|
if (r->rulenum >= rnum && r->rulenum <= last) {
|
|
show_ipfw(r, pcwidth, bcwidth);
|
|
seen = 1;
|
|
}
|
|
}
|
|
if (!seen) {
|
|
/* give precedence to other error(s) */
|
|
if (exitval == EX_OK)
|
|
exitval = EX_UNAVAILABLE;
|
|
warnx("rule %lu does not exist", rnum);
|
|
}
|
|
}
|
|
|
|
if (do_dynamic && ndyn) {
|
|
printf("## Dynamic rules:\n");
|
|
for (lac = ac, lav = av; lac != 0; lac--) {
|
|
rnum = strtoul(*lav++, &endptr, 10);
|
|
if (*endptr == '-')
|
|
last = strtoul(endptr+1, &endptr, 10);
|
|
if (*endptr)
|
|
/* already warned */
|
|
continue;
|
|
for (n = 0, d = dynrules; n < ndyn; n++, d++) {
|
|
uint16_t rulenum;
|
|
|
|
bcopy(&d->rule, &rulenum, sizeof(rulenum));
|
|
if (rulenum > rnum)
|
|
break;
|
|
if (r->rulenum >= rnum && r->rulenum <= last)
|
|
show_dyn_ipfw(d, pcwidth, bcwidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
ac = 0;
|
|
|
|
done:
|
|
free(data);
|
|
|
|
if (exitval != EX_OK)
|
|
exit(exitval);
|
|
#undef NEXT
|
|
}
|
|
|
|
static void
|
|
show_usage(void)
|
|
{
|
|
fprintf(stderr, "usage: ipfw [options]\n"
|
|
"do \"ipfw -h\" or see ipfw manpage for details\n"
|
|
);
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
static void
|
|
help(void)
|
|
{
|
|
fprintf(stderr,
|
|
"ipfw syntax summary (but please do read the ipfw(8) manpage):\n"
|
|
"ipfw [-abcdefhnNqStTv] <command> where <command> is one of:\n"
|
|
"add [num] [set N] [prob x] RULE-BODY\n"
|
|
"{pipe|queue} N config PIPE-BODY\n"
|
|
"[pipe|queue] {zero|delete|show} [N{,N}]\n"
|
|
"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n"
|
|
"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n"
|
|
"\n"
|
|
"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n"
|
|
"ACTION: check-state | allow | count | deny | reject | skipto N |\n"
|
|
" {divert|tee} PORT | forward ADDR | pipe N | queue N\n"
|
|
"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n"
|
|
"ADDR: [ MAC dst src ether_type ] \n"
|
|
" [ from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n"
|
|
"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n"
|
|
"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n"
|
|
"OPTION_LIST: OPTION [OPTION_LIST]\n"
|
|
"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n"
|
|
" {dst-ip|src-ip} ADDR | {dst-port|src-port} LIST |\n"
|
|
" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n"
|
|
" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n"
|
|
" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n"
|
|
" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n"
|
|
" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n"
|
|
" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n"
|
|
);
|
|
exit(0);
|
|
}
|
|
|
|
|
|
static int
|
|
lookup_host (char *host, struct in_addr *ipaddr)
|
|
{
|
|
struct hostent *he;
|
|
|
|
if (!inet_aton(host, ipaddr)) {
|
|
if ((he = gethostbyname(host)) == NULL)
|
|
return(-1);
|
|
*ipaddr = *(struct in_addr *)he->h_addr_list[0];
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* fills the addr and mask fields in the instruction as appropriate from av.
|
|
* Update length as appropriate.
|
|
* The following formats are allowed:
|
|
* any matches any IP. Actually returns an empty instruction.
|
|
* me returns O_IP_*_ME
|
|
* 1.2.3.4 single IP address
|
|
* 1.2.3.4:5.6.7.8 address:mask
|
|
* 1.2.3.4/24 address/mask
|
|
* 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
|
|
* We can have multiple comma-separated address/mask entries.
|
|
*/
|
|
static void
|
|
fill_ip(ipfw_insn_ip *cmd, char *av)
|
|
{
|
|
int len = 0;
|
|
uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
|
|
|
|
cmd->o.len &= ~F_LEN_MASK; /* zero len */
|
|
|
|
if (_substrcmp(av, "any") == 0)
|
|
return;
|
|
|
|
if (_substrcmp(av, "me") == 0) {
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn);
|
|
return;
|
|
}
|
|
|
|
if (strncmp(av, "table(", 6) == 0) {
|
|
char *p = strchr(av + 6, ',');
|
|
|
|
if (p)
|
|
*p++ = '\0';
|
|
cmd->o.opcode = O_IP_DST_LOOKUP;
|
|
cmd->o.arg1 = strtoul(av + 6, NULL, 0);
|
|
if (p) {
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
|
|
d[0] = strtoul(p, NULL, 0);
|
|
} else
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn);
|
|
return;
|
|
}
|
|
|
|
while (av) {
|
|
/*
|
|
* After the address we can have '/' or ':' indicating a mask,
|
|
* ',' indicating another address follows, '{' indicating a
|
|
* set of addresses of unspecified size.
|
|
*/
|
|
char *p = strpbrk(av, "/:,{");
|
|
int masklen;
|
|
char md;
|
|
|
|
if (p) {
|
|
md = *p;
|
|
*p++ = '\0';
|
|
} else
|
|
md = '\0';
|
|
|
|
if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
|
|
errx(EX_NOHOST, "hostname ``%s'' unknown", av);
|
|
switch (md) {
|
|
case ':':
|
|
if (!inet_aton(p, (struct in_addr *)&d[1]))
|
|
errx(EX_DATAERR, "bad netmask ``%s''", p);
|
|
break;
|
|
case '/':
|
|
masklen = atoi(p);
|
|
if (masklen == 0)
|
|
d[1] = htonl(0); /* mask */
|
|
else if (masklen > 32)
|
|
errx(EX_DATAERR, "bad width ``%s''", p);
|
|
else
|
|
d[1] = htonl(~0 << (32 - masklen));
|
|
break;
|
|
case '{': /* no mask, assume /24 and put back the '{' */
|
|
d[1] = htonl(~0 << (32 - 24));
|
|
*(--p) = md;
|
|
break;
|
|
|
|
case ',': /* single address plus continuation */
|
|
*(--p) = md;
|
|
/* FALLTHROUGH */
|
|
case 0: /* initialization value */
|
|
default:
|
|
d[1] = htonl(~0); /* force /32 */
|
|
break;
|
|
}
|
|
d[0] &= d[1]; /* mask base address with mask */
|
|
/* find next separator */
|
|
if (p)
|
|
p = strpbrk(p, ",{");
|
|
if (p && *p == '{') {
|
|
/*
|
|
* We have a set of addresses. They are stored as follows:
|
|
* arg1 is the set size (powers of 2, 2..256)
|
|
* addr is the base address IN HOST FORMAT
|
|
* mask.. is an array of arg1 bits (rounded up to
|
|
* the next multiple of 32) with bits set
|
|
* for each host in the map.
|
|
*/
|
|
uint32_t *map = (uint32_t *)&cmd->mask;
|
|
int low, high;
|
|
int i = contigmask((uint8_t *)&(d[1]), 32);
|
|
|
|
if (len > 0)
|
|
errx(EX_DATAERR, "address set cannot be in a list");
|
|
if (i < 24 || i > 31)
|
|
errx(EX_DATAERR, "invalid set with mask %d\n", i);
|
|
cmd->o.arg1 = 1<<(32-i); /* map length */
|
|
d[0] = ntohl(d[0]); /* base addr in host format */
|
|
cmd->o.opcode = O_IP_DST_SET; /* default */
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
|
|
for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
|
|
map[i] = 0; /* clear map */
|
|
|
|
av = p + 1;
|
|
low = d[0] & 0xff;
|
|
high = low + cmd->o.arg1 - 1;
|
|
/*
|
|
* Here, i stores the previous value when we specify a range
|
|
* of addresses within a mask, e.g. 45-63. i = -1 means we
|
|
* have no previous value.
|
|
*/
|
|
i = -1; /* previous value in a range */
|
|
while (isdigit(*av)) {
|
|
char *s;
|
|
int a = strtol(av, &s, 0);
|
|
|
|
if (s == av) { /* no parameter */
|
|
if (*av != '}')
|
|
errx(EX_DATAERR, "set not closed\n");
|
|
if (i != -1)
|
|
errx(EX_DATAERR, "incomplete range %d-", i);
|
|
break;
|
|
}
|
|
if (a < low || a > high)
|
|
errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
|
|
a, low, high);
|
|
a -= low;
|
|
if (i == -1) /* no previous in range */
|
|
i = a;
|
|
else { /* check that range is valid */
|
|
if (i > a)
|
|
errx(EX_DATAERR, "invalid range %d-%d",
|
|
i+low, a+low);
|
|
if (*s == '-')
|
|
errx(EX_DATAERR, "double '-' in range");
|
|
}
|
|
for (; i <= a; i++)
|
|
map[i/32] |= 1<<(i & 31);
|
|
i = -1;
|
|
if (*s == '-')
|
|
i = a;
|
|
else if (*s == '}')
|
|
break;
|
|
av = s+1;
|
|
}
|
|
return;
|
|
}
|
|
av = p;
|
|
if (av) /* then *av must be a ',' */
|
|
av++;
|
|
|
|
/* Check this entry */
|
|
if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
|
|
/*
|
|
* 'any' turns the entire list into a NOP.
|
|
* 'not any' never matches, so it is removed from the
|
|
* list unless it is the only item, in which case we
|
|
* report an error.
|
|
*/
|
|
if (cmd->o.len & F_NOT) { /* "not any" never matches */
|
|
if (av == NULL && len == 0) /* only this entry */
|
|
errx(EX_DATAERR, "not any never matches");
|
|
}
|
|
/* else do nothing and skip this entry */
|
|
return;
|
|
}
|
|
/* A single IP can be stored in an optimized format */
|
|
if (d[1] == IP_MASK_ALL && av == NULL && len == 0) {
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
|
|
return;
|
|
}
|
|
len += 2; /* two words... */
|
|
d += 2;
|
|
} /* end while */
|
|
cmd->o.len |= len+1;
|
|
}
|
|
|
|
|
|
/*
|
|
* helper function to process a set of flags and set bits in the
|
|
* appropriate masks.
|
|
*/
|
|
static void
|
|
fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
|
|
struct _s_x *flags, char *p)
|
|
{
|
|
uint8_t set=0, clear=0;
|
|
|
|
while (p && *p) {
|
|
char *q; /* points to the separator */
|
|
int val;
|
|
uint8_t *which; /* mask we are working on */
|
|
|
|
if (*p == '!') {
|
|
p++;
|
|
which = &clear;
|
|
} else
|
|
which = &set;
|
|
q = strchr(p, ',');
|
|
if (q)
|
|
*q++ = '\0';
|
|
val = match_token(flags, p);
|
|
if (val <= 0)
|
|
errx(EX_DATAERR, "invalid flag %s", p);
|
|
*which |= (uint8_t)val;
|
|
p = q;
|
|
}
|
|
cmd->opcode = opcode;
|
|
cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
|
|
cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
|
|
}
|
|
|
|
|
|
static void
|
|
delete(int ac, char *av[])
|
|
{
|
|
uint32_t rulenum;
|
|
struct dn_pipe p;
|
|
int i;
|
|
int exitval = EX_OK;
|
|
int do_set = 0;
|
|
|
|
memset(&p, 0, sizeof p);
|
|
|
|
av++; ac--;
|
|
NEED1("missing rule specification");
|
|
if (ac > 0 && _substrcmp(*av, "set") == 0) {
|
|
do_set = 1; /* delete set */
|
|
ac--; av++;
|
|
}
|
|
|
|
/* Rule number */
|
|
while (ac && isdigit(**av)) {
|
|
i = atoi(*av); av++; ac--;
|
|
if (do_pipe) {
|
|
if (do_pipe == 1)
|
|
p.pipe_nr = i;
|
|
else
|
|
p.fs.fs_nr = i;
|
|
i = do_cmd(IP_DUMMYNET_DEL, &p, sizeof p);
|
|
if (i) {
|
|
exitval = 1;
|
|
warn("rule %u: setsockopt(IP_DUMMYNET_DEL)",
|
|
do_pipe == 1 ? p.pipe_nr : p.fs.fs_nr);
|
|
}
|
|
} else {
|
|
rulenum = (i & 0xffff) | (do_set << 24);
|
|
i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
|
|
if (i) {
|
|
exitval = EX_UNAVAILABLE;
|
|
warn("rule %u: setsockopt(IP_FW_DEL)",
|
|
rulenum);
|
|
}
|
|
}
|
|
}
|
|
if (exitval != EX_OK)
|
|
exit(exitval);
|
|
}
|
|
|
|
|
|
/*
|
|
* fill the interface structure. We do not check the name as we can
|
|
* create interfaces dynamically, so checking them at insert time
|
|
* makes relatively little sense.
|
|
* Interface names containing '*', '?', or '[' are assumed to be shell
|
|
* patterns which match interfaces.
|
|
*/
|
|
static void
|
|
fill_iface(ipfw_insn_if *cmd, char *arg)
|
|
{
|
|
cmd->name[0] = '\0';
|
|
cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
|
|
|
|
/* Parse the interface or address */
|
|
if (strcmp(arg, "any") == 0)
|
|
cmd->o.len = 0; /* effectively ignore this command */
|
|
else if (!isdigit(*arg)) {
|
|
strlcpy(cmd->name, arg, sizeof(cmd->name));
|
|
cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
|
|
} else if (!inet_aton(arg, &cmd->p.ip))
|
|
errx(EX_DATAERR, "bad ip address ``%s''", arg);
|
|
}
|
|
|
|
static void
|
|
config_pipe(int ac, char **av)
|
|
{
|
|
struct dn_pipe p;
|
|
int i;
|
|
char *end;
|
|
uint32_t a;
|
|
void *par = NULL;
|
|
|
|
memset(&p, 0, sizeof p);
|
|
|
|
av++; ac--;
|
|
/* Pipe number */
|
|
if (ac && isdigit(**av)) {
|
|
i = atoi(*av); av++; ac--;
|
|
if (do_pipe == 1)
|
|
p.pipe_nr = i;
|
|
else
|
|
p.fs.fs_nr = i;
|
|
}
|
|
while (ac > 0) {
|
|
double d;
|
|
int tok = match_token(dummynet_params, *av);
|
|
ac--; av++;
|
|
|
|
switch(tok) {
|
|
case TOK_NOERROR:
|
|
p.fs.flags_fs |= DN_NOERROR;
|
|
break;
|
|
|
|
case TOK_PLR:
|
|
NEED1("plr needs argument 0..1\n");
|
|
d = strtod(av[0], NULL);
|
|
if (d > 1)
|
|
d = 1;
|
|
else if (d < 0)
|
|
d = 0;
|
|
p.fs.plr = (int)(d*0x7fffffff);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_QUEUE:
|
|
NEED1("queue needs queue size\n");
|
|
end = NULL;
|
|
p.fs.qsize = strtoul(av[0], &end, 0);
|
|
if (*end == 'K' || *end == 'k') {
|
|
p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
|
|
p.fs.qsize *= 1024;
|
|
} else if (*end == 'B' ||
|
|
_substrcmp2(end, "by", "bytes") == 0) {
|
|
p.fs.flags_fs |= DN_QSIZE_IS_BYTES;
|
|
}
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_BUCKETS:
|
|
NEED1("buckets needs argument\n");
|
|
p.fs.rq_size = strtoul(av[0], NULL, 0);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_MASK:
|
|
NEED1("mask needs mask specifier\n");
|
|
/*
|
|
* per-flow queue, mask is dst_ip, dst_port,
|
|
* src_ip, src_port, proto measured in bits
|
|
*/
|
|
par = NULL;
|
|
|
|
p.fs.flow_mask.dst_ip = 0;
|
|
p.fs.flow_mask.src_ip = 0;
|
|
p.fs.flow_mask.dst_port = 0;
|
|
p.fs.flow_mask.src_port = 0;
|
|
p.fs.flow_mask.proto = 0;
|
|
end = NULL;
|
|
|
|
while (ac >= 1) {
|
|
uint32_t *p32 = NULL;
|
|
uint16_t *p16 = NULL;
|
|
|
|
tok = match_token(dummynet_params, *av);
|
|
ac--; av++;
|
|
switch(tok) {
|
|
case TOK_ALL:
|
|
/*
|
|
* special case, all bits significant
|
|
*/
|
|
p.fs.flow_mask.dst_ip = ~0;
|
|
p.fs.flow_mask.src_ip = ~0;
|
|
p.fs.flow_mask.dst_port = ~0;
|
|
p.fs.flow_mask.src_port = ~0;
|
|
p.fs.flow_mask.proto = ~0;
|
|
p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
|
|
goto end_mask;
|
|
|
|
case TOK_DSTIP:
|
|
p32 = &p.fs.flow_mask.dst_ip;
|
|
break;
|
|
|
|
case TOK_SRCIP:
|
|
p32 = &p.fs.flow_mask.src_ip;
|
|
break;
|
|
|
|
case TOK_DSTPORT:
|
|
p16 = &p.fs.flow_mask.dst_port;
|
|
break;
|
|
|
|
case TOK_SRCPORT:
|
|
p16 = &p.fs.flow_mask.src_port;
|
|
break;
|
|
|
|
case TOK_PROTO:
|
|
break;
|
|
|
|
default:
|
|
ac++; av--; /* backtrack */
|
|
goto end_mask;
|
|
}
|
|
if (ac < 1)
|
|
errx(EX_USAGE, "mask: value missing");
|
|
if (*av[0] == '/') {
|
|
a = strtoul(av[0]+1, &end, 0);
|
|
a = (a == 32) ? ~0 : (1 << a) - 1;
|
|
} else
|
|
a = strtoul(av[0], &end, 0);
|
|
if (p32 != NULL)
|
|
*p32 = a;
|
|
else if (p16 != NULL) {
|
|
if (a > 0xFFFF)
|
|
errx(EX_DATAERR,
|
|
"mask: must be 16 bit");
|
|
*p16 = (uint16_t)a;
|
|
} else {
|
|
if (a > 0xFF)
|
|
errx(EX_DATAERR,
|
|
"mask: must be 8 bit");
|
|
p.fs.flow_mask.proto = (uint8_t)a;
|
|
}
|
|
if (a != 0)
|
|
p.fs.flags_fs |= DN_HAVE_FLOW_MASK;
|
|
ac--; av++;
|
|
} /* end while, config masks */
|
|
end_mask:
|
|
break;
|
|
|
|
case TOK_RED:
|
|
case TOK_GRED:
|
|
NEED1("red/gred needs w_q/min_th/max_th/max_p\n");
|
|
p.fs.flags_fs |= DN_IS_RED;
|
|
if (tok == TOK_GRED)
|
|
p.fs.flags_fs |= DN_IS_GENTLE_RED;
|
|
/*
|
|
* the format for parameters is w_q/min_th/max_th/max_p
|
|
*/
|
|
if ((end = strsep(&av[0], "/"))) {
|
|
double w_q = strtod(end, NULL);
|
|
if (w_q > 1 || w_q <= 0)
|
|
errx(EX_DATAERR, "0 < w_q <= 1");
|
|
p.fs.w_q = (int) (w_q * (1 << SCALE_RED));
|
|
}
|
|
if ((end = strsep(&av[0], "/"))) {
|
|
p.fs.min_th = strtoul(end, &end, 0);
|
|
if (*end == 'K' || *end == 'k')
|
|
p.fs.min_th *= 1024;
|
|
}
|
|
if ((end = strsep(&av[0], "/"))) {
|
|
p.fs.max_th = strtoul(end, &end, 0);
|
|
if (*end == 'K' || *end == 'k')
|
|
p.fs.max_th *= 1024;
|
|
}
|
|
if ((end = strsep(&av[0], "/"))) {
|
|
double max_p = strtod(end, NULL);
|
|
if (max_p > 1 || max_p <= 0)
|
|
errx(EX_DATAERR, "0 < max_p <= 1");
|
|
p.fs.max_p = (int)(max_p * (1 << SCALE_RED));
|
|
}
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_DROPTAIL:
|
|
p.fs.flags_fs &= ~(DN_IS_RED|DN_IS_GENTLE_RED);
|
|
break;
|
|
|
|
case TOK_BW:
|
|
NEED1("bw needs bandwidth or interface\n");
|
|
if (do_pipe != 1)
|
|
errx(EX_DATAERR, "bandwidth only valid for pipes");
|
|
/*
|
|
* set clocking interface or bandwidth value
|
|
*/
|
|
if (av[0][0] >= 'a' && av[0][0] <= 'z') {
|
|
int l = sizeof(p.if_name)-1;
|
|
/* interface name */
|
|
strncpy(p.if_name, av[0], l);
|
|
p.if_name[l] = '\0';
|
|
p.bandwidth = 0;
|
|
} else {
|
|
p.if_name[0] = '\0';
|
|
p.bandwidth = strtoul(av[0], &end, 0);
|
|
if (*end == 'K' || *end == 'k') {
|
|
end++;
|
|
p.bandwidth *= 1000;
|
|
} else if (*end == 'M') {
|
|
end++;
|
|
p.bandwidth *= 1000000;
|
|
}
|
|
if (*end == 'B' ||
|
|
_substrcmp2(end, "by", "bytes") == 0)
|
|
p.bandwidth *= 8;
|
|
if (p.bandwidth < 0)
|
|
errx(EX_DATAERR, "bandwidth too large");
|
|
}
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_DELAY:
|
|
if (do_pipe != 1)
|
|
errx(EX_DATAERR, "delay only valid for pipes");
|
|
NEED1("delay needs argument 0..10000ms\n");
|
|
p.delay = strtoul(av[0], NULL, 0);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_WEIGHT:
|
|
if (do_pipe == 1)
|
|
errx(EX_DATAERR,"weight only valid for queues");
|
|
NEED1("weight needs argument 0..100\n");
|
|
p.fs.weight = strtoul(av[0], &end, 0);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_PIPE:
|
|
if (do_pipe == 1)
|
|
errx(EX_DATAERR,"pipe only valid for queues");
|
|
NEED1("pipe needs pipe_number\n");
|
|
p.fs.parent_nr = strtoul(av[0], &end, 0);
|
|
ac--; av++;
|
|
break;
|
|
|
|
default:
|
|
errx(EX_DATAERR, "unrecognised option ``%s''", av[-1]);
|
|
}
|
|
}
|
|
if (do_pipe == 1) {
|
|
if (p.pipe_nr == 0)
|
|
errx(EX_DATAERR, "pipe_nr must be > 0");
|
|
if (p.delay > 10000)
|
|
errx(EX_DATAERR, "delay must be < 10000");
|
|
} else { /* do_pipe == 2, queue */
|
|
if (p.fs.parent_nr == 0)
|
|
errx(EX_DATAERR, "pipe must be > 0");
|
|
if (p.fs.weight >100)
|
|
errx(EX_DATAERR, "weight must be <= 100");
|
|
}
|
|
if (p.fs.flags_fs & DN_QSIZE_IS_BYTES) {
|
|
if (p.fs.qsize > 1024*1024)
|
|
errx(EX_DATAERR, "queue size must be < 1MB");
|
|
} else {
|
|
if (p.fs.qsize > 100)
|
|
errx(EX_DATAERR, "2 <= queue size <= 100");
|
|
}
|
|
if (p.fs.flags_fs & DN_IS_RED) {
|
|
size_t len;
|
|
int lookup_depth, avg_pkt_size;
|
|
double s, idle, weight, w_q;
|
|
struct clockinfo ck;
|
|
int t;
|
|
|
|
if (p.fs.min_th >= p.fs.max_th)
|
|
errx(EX_DATAERR, "min_th %d must be < than max_th %d",
|
|
p.fs.min_th, p.fs.max_th);
|
|
if (p.fs.max_th == 0)
|
|
errx(EX_DATAERR, "max_th must be > 0");
|
|
|
|
len = sizeof(int);
|
|
if (sysctlbyname("net.inet.ip.dummynet.red_lookup_depth",
|
|
&lookup_depth, &len, NULL, 0) == -1)
|
|
|
|
errx(1, "sysctlbyname(\"%s\")",
|
|
"net.inet.ip.dummynet.red_lookup_depth");
|
|
if (lookup_depth == 0)
|
|
errx(EX_DATAERR, "net.inet.ip.dummynet.red_lookup_depth"
|
|
" must be greater than zero");
|
|
|
|
len = sizeof(int);
|
|
if (sysctlbyname("net.inet.ip.dummynet.red_avg_pkt_size",
|
|
&avg_pkt_size, &len, NULL, 0) == -1)
|
|
|
|
errx(1, "sysctlbyname(\"%s\")",
|
|
"net.inet.ip.dummynet.red_avg_pkt_size");
|
|
if (avg_pkt_size == 0)
|
|
errx(EX_DATAERR,
|
|
"net.inet.ip.dummynet.red_avg_pkt_size must"
|
|
" be greater than zero");
|
|
|
|
len = sizeof(struct clockinfo);
|
|
if (sysctlbyname("kern.clockrate", &ck, &len, NULL, 0) == -1)
|
|
errx(1, "sysctlbyname(\"%s\")", "kern.clockrate");
|
|
|
|
/*
|
|
* Ticks needed for sending a medium-sized packet.
|
|
* Unfortunately, when we are configuring a WF2Q+ queue, we
|
|
* do not have bandwidth information, because that is stored
|
|
* in the parent pipe, and also we have multiple queues
|
|
* competing for it. So we set s=0, which is not very
|
|
* correct. But on the other hand, why do we want RED with
|
|
* WF2Q+ ?
|
|
*/
|
|
if (p.bandwidth==0) /* this is a WF2Q+ queue */
|
|
s = 0;
|
|
else
|
|
s = ck.hz * avg_pkt_size * 8 / p.bandwidth;
|
|
|
|
/*
|
|
* max idle time (in ticks) before avg queue size becomes 0.
|
|
* NOTA: (3/w_q) is approx the value x so that
|
|
* (1-w_q)^x < 10^-3.
|
|
*/
|
|
w_q = ((double)p.fs.w_q) / (1 << SCALE_RED);
|
|
idle = s * 3. / w_q;
|
|
p.fs.lookup_step = (int)idle / lookup_depth;
|
|
if (!p.fs.lookup_step)
|
|
p.fs.lookup_step = 1;
|
|
weight = 1 - w_q;
|
|
for (t = p.fs.lookup_step; t > 0; --t)
|
|
weight *= weight;
|
|
p.fs.lookup_weight = (int)(weight * (1 << SCALE_RED));
|
|
}
|
|
i = do_cmd(IP_DUMMYNET_CONFIGURE, &p, sizeof p);
|
|
if (i)
|
|
err(1, "setsockopt(%s)", "IP_DUMMYNET_CONFIGURE");
|
|
}
|
|
|
|
static void
|
|
get_mac_addr_mask(char *p, uint8_t *addr, uint8_t *mask)
|
|
{
|
|
int i, l;
|
|
|
|
for (i=0; i<6; i++)
|
|
addr[i] = mask[i] = 0;
|
|
if (strcmp(p, "any") == 0)
|
|
return;
|
|
|
|
for (i=0; *p && i<6;i++, p++) {
|
|
addr[i] = strtol(p, &p, 16);
|
|
if (*p != ':') /* we start with the mask */
|
|
break;
|
|
}
|
|
if (*p == '/') { /* mask len */
|
|
l = strtol(p+1, &p, 0);
|
|
for (i=0; l>0; l -=8, i++)
|
|
mask[i] = (l >=8) ? 0xff : (~0) << (8-l);
|
|
} else if (*p == '&') { /* mask */
|
|
for (i=0, p++; *p && i<6;i++, p++) {
|
|
mask[i] = strtol(p, &p, 16);
|
|
if (*p != ':')
|
|
break;
|
|
}
|
|
} else if (*p == '\0') {
|
|
for (i=0; i<6; i++)
|
|
mask[i] = 0xff;
|
|
}
|
|
for (i=0; i<6; i++)
|
|
addr[i] &= mask[i];
|
|
}
|
|
|
|
/*
|
|
* helper function, updates the pointer to cmd with the length
|
|
* of the current command, and also cleans up the first word of
|
|
* the new command in case it has been clobbered before.
|
|
*/
|
|
static ipfw_insn *
|
|
next_cmd(ipfw_insn *cmd)
|
|
{
|
|
cmd += F_LEN(cmd);
|
|
bzero(cmd, sizeof(*cmd));
|
|
return cmd;
|
|
}
|
|
|
|
/*
|
|
* Takes arguments and copies them into a comment
|
|
*/
|
|
static void
|
|
fill_comment(ipfw_insn *cmd, int ac, char **av)
|
|
{
|
|
int i, l;
|
|
char *p = (char *)(cmd + 1);
|
|
|
|
cmd->opcode = O_NOP;
|
|
cmd->len = (cmd->len & (F_NOT | F_OR));
|
|
|
|
/* Compute length of comment string. */
|
|
for (i = 0, l = 0; i < ac; i++)
|
|
l += strlen(av[i]) + 1;
|
|
if (l == 0)
|
|
return;
|
|
if (l > 84)
|
|
errx(EX_DATAERR,
|
|
"comment too long (max 80 chars)");
|
|
l = 1 + (l+3)/4;
|
|
cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
|
|
for (i = 0; i < ac; i++) {
|
|
strcpy(p, av[i]);
|
|
p += strlen(av[i]);
|
|
*p++ = ' ';
|
|
}
|
|
*(--p) = '\0';
|
|
}
|
|
|
|
/*
|
|
* A function to fill simple commands of size 1.
|
|
* Existing flags are preserved.
|
|
*/
|
|
static void
|
|
fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
|
|
{
|
|
cmd->opcode = opcode;
|
|
cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
|
|
cmd->arg1 = arg;
|
|
}
|
|
|
|
/*
|
|
* Fetch and add the MAC address and type, with masks. This generates one or
|
|
* two microinstructions, and returns the pointer to the last one.
|
|
*/
|
|
static ipfw_insn *
|
|
add_mac(ipfw_insn *cmd, int ac, char *av[])
|
|
{
|
|
ipfw_insn_mac *mac;
|
|
|
|
if (ac < 2)
|
|
errx(EX_DATAERR, "MAC dst src");
|
|
|
|
cmd->opcode = O_MACADDR2;
|
|
cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
|
|
|
|
mac = (ipfw_insn_mac *)cmd;
|
|
get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
|
|
get_mac_addr_mask(av[1], &(mac->addr[6]), &(mac->mask[6])); /* src */
|
|
return cmd;
|
|
}
|
|
|
|
static ipfw_insn *
|
|
add_mactype(ipfw_insn *cmd, int ac, char *av)
|
|
{
|
|
if (ac < 1)
|
|
errx(EX_DATAERR, "missing MAC type");
|
|
if (strcmp(av, "any") != 0) { /* we have a non-null type */
|
|
fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
|
|
cmd->opcode = O_MAC_TYPE;
|
|
return cmd;
|
|
} else
|
|
return NULL;
|
|
}
|
|
|
|
static ipfw_insn *
|
|
add_proto(ipfw_insn *cmd, char *av)
|
|
{
|
|
struct protoent *pe;
|
|
u_char proto = 0;
|
|
|
|
if (_substrcmp(av, "all") == 0)
|
|
; /* same as "ip" */
|
|
else if ((proto = atoi(av)) > 0)
|
|
; /* all done! */
|
|
else if ((pe = getprotobyname(av)) != NULL)
|
|
proto = pe->p_proto;
|
|
else
|
|
return NULL;
|
|
if (proto != IPPROTO_IP)
|
|
fill_cmd(cmd, O_PROTO, 0, proto);
|
|
return cmd;
|
|
}
|
|
|
|
static ipfw_insn *
|
|
add_srcip(ipfw_insn *cmd, char *av)
|
|
{
|
|
fill_ip((ipfw_insn_ip *)cmd, av);
|
|
if (cmd->opcode == O_IP_DST_SET) /* set */
|
|
cmd->opcode = O_IP_SRC_SET;
|
|
else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
|
|
cmd->opcode = O_IP_SRC_LOOKUP;
|
|
else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
|
|
cmd->opcode = O_IP_SRC_ME;
|
|
else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
|
|
cmd->opcode = O_IP_SRC;
|
|
else /* addr/mask */
|
|
cmd->opcode = O_IP_SRC_MASK;
|
|
return cmd;
|
|
}
|
|
|
|
static ipfw_insn *
|
|
add_dstip(ipfw_insn *cmd, char *av)
|
|
{
|
|
fill_ip((ipfw_insn_ip *)cmd, av);
|
|
if (cmd->opcode == O_IP_DST_SET) /* set */
|
|
;
|
|
else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
|
|
;
|
|
else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
|
|
cmd->opcode = O_IP_DST_ME;
|
|
else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
|
|
cmd->opcode = O_IP_DST;
|
|
else /* addr/mask */
|
|
cmd->opcode = O_IP_DST_MASK;
|
|
return cmd;
|
|
}
|
|
|
|
static ipfw_insn *
|
|
add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
|
|
{
|
|
if (_substrcmp(av, "any") == 0) {
|
|
return NULL;
|
|
} else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
|
|
/* XXX todo: check that we have a protocol with ports */
|
|
cmd->opcode = opcode;
|
|
return cmd;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Parse arguments and assemble the microinstructions which make up a rule.
|
|
* Rules are added into the 'rulebuf' and then copied in the correct order
|
|
* into the actual rule.
|
|
*
|
|
* The syntax for a rule starts with the action, followed by
|
|
* optional action parameters, and the various match patterns.
|
|
* In the assembled microcode, the first opcode must be an O_PROBE_STATE
|
|
* (generated if the rule includes a keep-state option), then the
|
|
* various match patterns, log/altq actions, and the actual action.
|
|
*
|
|
*/
|
|
static void
|
|
add(int ac, char *av[])
|
|
{
|
|
/*
|
|
* rules are added into the 'rulebuf' and then copied in
|
|
* the correct order into the actual rule.
|
|
* Some things that need to go out of order (prob, action etc.)
|
|
* go into actbuf[].
|
|
*/
|
|
static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
|
|
|
|
ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
|
|
ipfw_insn *first_cmd; /* first match pattern */
|
|
|
|
struct ip_fw *rule;
|
|
|
|
/*
|
|
* various flags used to record that we entered some fields.
|
|
*/
|
|
ipfw_insn *have_state = NULL; /* check-state or keep-state */
|
|
ipfw_insn *have_log = NULL, *have_altq = NULL;
|
|
size_t len;
|
|
|
|
int i;
|
|
|
|
int open_par = 0; /* open parenthesis ( */
|
|
|
|
/* proto is here because it is used to fetch ports */
|
|
u_char proto = IPPROTO_IP; /* default protocol */
|
|
|
|
double match_prob = 1; /* match probability, default is always match */
|
|
|
|
bzero(actbuf, sizeof(actbuf)); /* actions go here */
|
|
bzero(cmdbuf, sizeof(cmdbuf));
|
|
bzero(rulebuf, sizeof(rulebuf));
|
|
|
|
rule = (struct ip_fw *)rulebuf;
|
|
cmd = (ipfw_insn *)cmdbuf;
|
|
action = (ipfw_insn *)actbuf;
|
|
|
|
av++; ac--;
|
|
|
|
/* [rule N] -- Rule number optional */
|
|
if (ac && isdigit(**av)) {
|
|
rule->rulenum = atoi(*av);
|
|
av++;
|
|
ac--;
|
|
}
|
|
|
|
/* [set N] -- set number (0..RESVD_SET), optional */
|
|
if (ac > 1 && _substrcmp(*av, "set") == 0) {
|
|
int set = strtoul(av[1], NULL, 10);
|
|
if (set < 0 || set > RESVD_SET)
|
|
errx(EX_DATAERR, "illegal set %s", av[1]);
|
|
rule->set = set;
|
|
av += 2; ac -= 2;
|
|
}
|
|
|
|
/* [prob D] -- match probability, optional */
|
|
if (ac > 1 && _substrcmp(*av, "prob") == 0) {
|
|
match_prob = strtod(av[1], NULL);
|
|
|
|
if (match_prob <= 0 || match_prob > 1)
|
|
errx(EX_DATAERR, "illegal match prob. %s", av[1]);
|
|
av += 2; ac -= 2;
|
|
}
|
|
|
|
/* action -- mandatory */
|
|
NEED1("missing action");
|
|
i = match_token(rule_actions, *av);
|
|
ac--; av++;
|
|
action->len = 1; /* default */
|
|
switch(i) {
|
|
case TOK_CHECKSTATE:
|
|
have_state = action;
|
|
action->opcode = O_CHECK_STATE;
|
|
break;
|
|
|
|
case TOK_ACCEPT:
|
|
action->opcode = O_ACCEPT;
|
|
break;
|
|
|
|
case TOK_DENY:
|
|
action->opcode = O_DENY;
|
|
action->arg1 = 0;
|
|
break;
|
|
|
|
case TOK_REJECT:
|
|
action->opcode = O_REJECT;
|
|
action->arg1 = ICMP_UNREACH_HOST;
|
|
break;
|
|
|
|
case TOK_RESET:
|
|
action->opcode = O_REJECT;
|
|
action->arg1 = ICMP_REJECT_RST;
|
|
break;
|
|
|
|
case TOK_UNREACH:
|
|
action->opcode = O_REJECT;
|
|
NEED1("missing reject code");
|
|
fill_reject_code(&action->arg1, *av);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_COUNT:
|
|
action->opcode = O_COUNT;
|
|
break;
|
|
|
|
case TOK_QUEUE:
|
|
case TOK_PIPE:
|
|
action->len = F_INSN_SIZE(ipfw_insn_pipe);
|
|
case TOK_SKIPTO:
|
|
if (i == TOK_QUEUE)
|
|
action->opcode = O_QUEUE;
|
|
else if (i == TOK_PIPE)
|
|
action->opcode = O_PIPE;
|
|
else if (i == TOK_SKIPTO)
|
|
action->opcode = O_SKIPTO;
|
|
NEED1("missing skipto/pipe/queue number");
|
|
action->arg1 = strtoul(*av, NULL, 10);
|
|
av++; ac--;
|
|
break;
|
|
|
|
case TOK_DIVERT:
|
|
case TOK_TEE:
|
|
action->opcode = (i == TOK_DIVERT) ? O_DIVERT : O_TEE;
|
|
NEED1("missing divert/tee port");
|
|
action->arg1 = strtoul(*av, NULL, 0);
|
|
if (action->arg1 == 0) {
|
|
struct servent *s;
|
|
setservent(1);
|
|
s = getservbyname(av[0], "divert");
|
|
if (s != NULL)
|
|
action->arg1 = ntohs(s->s_port);
|
|
else
|
|
errx(EX_DATAERR, "illegal divert/tee port");
|
|
}
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_FORWARD: {
|
|
ipfw_insn_sa *p = (ipfw_insn_sa *)action;
|
|
char *s, *end;
|
|
|
|
NEED1("missing forward address[:port]");
|
|
|
|
action->opcode = O_FORWARD_IP;
|
|
action->len = F_INSN_SIZE(ipfw_insn_sa);
|
|
|
|
p->sa.sin_len = sizeof(struct sockaddr_in);
|
|
p->sa.sin_family = AF_INET;
|
|
p->sa.sin_port = 0;
|
|
/*
|
|
* locate the address-port separator (':' or ',')
|
|
*/
|
|
s = strchr(*av, ':');
|
|
if (s == NULL)
|
|
s = strchr(*av, ',');
|
|
if (s != NULL) {
|
|
*(s++) = '\0';
|
|
i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
|
|
if (s == end)
|
|
errx(EX_DATAERR,
|
|
"illegal forwarding port ``%s''", s);
|
|
p->sa.sin_port = (u_short)i;
|
|
}
|
|
lookup_host(*av, &(p->sa.sin_addr));
|
|
}
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_COMMENT:
|
|
/* pretend it is a 'count' rule followed by the comment */
|
|
action->opcode = O_COUNT;
|
|
ac++; av--; /* go back... */
|
|
break;
|
|
|
|
default:
|
|
errx(EX_DATAERR, "invalid action %s\n", av[-1]);
|
|
}
|
|
action = next_cmd(action);
|
|
|
|
/*
|
|
* [altq queuename] -- altq tag, optional
|
|
* [log [logamount N]] -- log, optional
|
|
*
|
|
* If they exist, it go first in the cmdbuf, but then it is
|
|
* skipped in the copy section to the end of the buffer.
|
|
*/
|
|
while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) {
|
|
ac--; av++;
|
|
switch (i) {
|
|
case TOK_LOG:
|
|
{
|
|
ipfw_insn_log *c = (ipfw_insn_log *)cmd;
|
|
int l;
|
|
|
|
if (have_log)
|
|
errx(EX_DATAERR,
|
|
"log cannot be specified more than once");
|
|
have_log = (ipfw_insn *)c;
|
|
cmd->len = F_INSN_SIZE(ipfw_insn_log);
|
|
cmd->opcode = O_LOG;
|
|
if (ac && _substrcmp(*av, "logamount") == 0) {
|
|
ac--; av++;
|
|
NEED1("logamount requires argument");
|
|
l = atoi(*av);
|
|
if (l < 0)
|
|
errx(EX_DATAERR,
|
|
"logamount must be positive");
|
|
c->max_log = l;
|
|
ac--; av++;
|
|
} else {
|
|
len = sizeof(c->max_log);
|
|
if (sysctlbyname("net.inet.ip.fw.verbose_limit",
|
|
&c->max_log, &len, NULL, 0) == -1)
|
|
errx(1, "sysctlbyname(\"%s\")",
|
|
"net.inet.ip.fw.verbose_limit");
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TOK_ALTQ:
|
|
{
|
|
ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
|
|
|
|
NEED1("missing altq queue name");
|
|
if (have_altq)
|
|
errx(EX_DATAERR,
|
|
"altq cannot be specified more than once");
|
|
have_altq = (ipfw_insn *)a;
|
|
cmd->len = F_INSN_SIZE(ipfw_insn_altq);
|
|
cmd->opcode = O_ALTQ;
|
|
fill_altq_qid(&a->qid, *av);
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
|
|
if (have_state) /* must be a check-state, we are done */
|
|
goto done;
|
|
|
|
#define OR_START(target) \
|
|
if (ac && (*av[0] == '(' || *av[0] == '{')) { \
|
|
if (open_par) \
|
|
errx(EX_USAGE, "nested \"(\" not allowed\n"); \
|
|
prev = NULL; \
|
|
open_par = 1; \
|
|
if ( (av[0])[1] == '\0') { \
|
|
ac--; av++; \
|
|
} else \
|
|
(*av)++; \
|
|
} \
|
|
target: \
|
|
|
|
|
|
#define CLOSE_PAR \
|
|
if (open_par) { \
|
|
if (ac && ( \
|
|
strcmp(*av, ")") == 0 || \
|
|
strcmp(*av, "}") == 0)) { \
|
|
prev = NULL; \
|
|
open_par = 0; \
|
|
ac--; av++; \
|
|
} else \
|
|
errx(EX_USAGE, "missing \")\"\n"); \
|
|
}
|
|
|
|
#define NOT_BLOCK \
|
|
if (ac && _substrcmp(*av, "not") == 0) { \
|
|
if (cmd->len & F_NOT) \
|
|
errx(EX_USAGE, "double \"not\" not allowed\n"); \
|
|
cmd->len |= F_NOT; \
|
|
ac--; av++; \
|
|
}
|
|
|
|
#define OR_BLOCK(target) \
|
|
if (ac && _substrcmp(*av, "or") == 0) { \
|
|
if (prev == NULL || open_par == 0) \
|
|
errx(EX_DATAERR, "invalid OR block"); \
|
|
prev->len |= F_OR; \
|
|
ac--; av++; \
|
|
goto target; \
|
|
} \
|
|
CLOSE_PAR;
|
|
|
|
first_cmd = cmd;
|
|
|
|
#if 0
|
|
/*
|
|
* MAC addresses, optional.
|
|
* If we have this, we skip the part "proto from src to dst"
|
|
* and jump straight to the option parsing.
|
|
*/
|
|
NOT_BLOCK;
|
|
NEED1("missing protocol");
|
|
if (_substrcmp(*av, "MAC") == 0 ||
|
|
_substrcmp(*av, "mac") == 0) {
|
|
ac--; av++; /* the "MAC" keyword */
|
|
add_mac(cmd, ac, av); /* exits in case of errors */
|
|
cmd = next_cmd(cmd);
|
|
ac -= 2; av += 2; /* dst-mac and src-mac */
|
|
NOT_BLOCK;
|
|
NEED1("missing mac type");
|
|
if (add_mactype(cmd, ac, av[0]))
|
|
cmd = next_cmd(cmd);
|
|
ac--; av++; /* any or mac-type */
|
|
goto read_options;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* protocol, mandatory
|
|
*/
|
|
OR_START(get_proto);
|
|
NOT_BLOCK;
|
|
NEED1("missing protocol");
|
|
if (add_proto(cmd, *av)) {
|
|
av++; ac--;
|
|
if (F_LEN(cmd) == 0) /* plain IP */
|
|
proto = 0;
|
|
else {
|
|
proto = cmd->arg1;
|
|
prev = cmd;
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
} else if (first_cmd != cmd) {
|
|
errx(EX_DATAERR, "invalid protocol ``%s''", *av);
|
|
} else
|
|
goto read_options;
|
|
OR_BLOCK(get_proto);
|
|
|
|
/*
|
|
* "from", mandatory
|
|
*/
|
|
if (!ac || _substrcmp(*av, "from") != 0)
|
|
errx(EX_USAGE, "missing ``from''");
|
|
ac--; av++;
|
|
|
|
/*
|
|
* source IP, mandatory
|
|
*/
|
|
OR_START(source_ip);
|
|
NOT_BLOCK; /* optional "not" */
|
|
NEED1("missing source address");
|
|
if (add_srcip(cmd, *av)) {
|
|
ac--; av++;
|
|
if (F_LEN(cmd) != 0) { /* ! any */
|
|
prev = cmd;
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
}
|
|
OR_BLOCK(source_ip);
|
|
|
|
/*
|
|
* source ports, optional
|
|
*/
|
|
NOT_BLOCK; /* optional "not" */
|
|
if (ac) {
|
|
if (_substrcmp(*av, "any") == 0 ||
|
|
add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
|
|
ac--; av++;
|
|
if (F_LEN(cmd) != 0)
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* "to", mandatory
|
|
*/
|
|
if (!ac || _substrcmp(*av, "to") != 0)
|
|
errx(EX_USAGE, "missing ``to''");
|
|
av++; ac--;
|
|
|
|
/*
|
|
* destination, mandatory
|
|
*/
|
|
OR_START(dest_ip);
|
|
NOT_BLOCK; /* optional "not" */
|
|
NEED1("missing dst address");
|
|
if (add_dstip(cmd, *av)) {
|
|
ac--; av++;
|
|
if (F_LEN(cmd) != 0) { /* ! any */
|
|
prev = cmd;
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
}
|
|
OR_BLOCK(dest_ip);
|
|
|
|
/*
|
|
* dest. ports, optional
|
|
*/
|
|
NOT_BLOCK; /* optional "not" */
|
|
if (ac) {
|
|
if (_substrcmp(*av, "any") == 0 ||
|
|
add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
|
|
ac--; av++;
|
|
if (F_LEN(cmd) != 0)
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
}
|
|
|
|
read_options:
|
|
if (ac && first_cmd == cmd) {
|
|
/*
|
|
* nothing specified so far, store in the rule to ease
|
|
* printout later.
|
|
*/
|
|
rule->_pad = 1;
|
|
}
|
|
prev = NULL;
|
|
while (ac) {
|
|
char *s;
|
|
ipfw_insn_u32 *cmd32; /* alias for cmd */
|
|
|
|
s = *av;
|
|
cmd32 = (ipfw_insn_u32 *)cmd;
|
|
|
|
if (*s == '!') { /* alternate syntax for NOT */
|
|
if (cmd->len & F_NOT)
|
|
errx(EX_USAGE, "double \"not\" not allowed\n");
|
|
cmd->len = F_NOT;
|
|
s++;
|
|
}
|
|
i = match_token(rule_options, s);
|
|
ac--; av++;
|
|
switch(i) {
|
|
case TOK_NOT:
|
|
if (cmd->len & F_NOT)
|
|
errx(EX_USAGE, "double \"not\" not allowed\n");
|
|
cmd->len = F_NOT;
|
|
break;
|
|
|
|
case TOK_OR:
|
|
if (open_par == 0 || prev == NULL)
|
|
errx(EX_USAGE, "invalid \"or\" block\n");
|
|
prev->len |= F_OR;
|
|
break;
|
|
|
|
case TOK_STARTBRACE:
|
|
if (open_par)
|
|
errx(EX_USAGE, "+nested \"(\" not allowed\n");
|
|
open_par = 1;
|
|
break;
|
|
|
|
case TOK_ENDBRACE:
|
|
if (!open_par)
|
|
errx(EX_USAGE, "+missing \")\"\n");
|
|
open_par = 0;
|
|
prev = NULL;
|
|
break;
|
|
|
|
case TOK_IN:
|
|
fill_cmd(cmd, O_IN, 0, 0);
|
|
break;
|
|
|
|
case TOK_OUT:
|
|
cmd->len ^= F_NOT; /* toggle F_NOT */
|
|
fill_cmd(cmd, O_IN, 0, 0);
|
|
break;
|
|
|
|
case TOK_DIVERTED:
|
|
fill_cmd(cmd, O_DIVERTED, 0, 3);
|
|
break;
|
|
|
|
case TOK_DIVERTEDLOOPBACK:
|
|
fill_cmd(cmd, O_DIVERTED, 0, 1);
|
|
break;
|
|
|
|
case TOK_DIVERTEDOUTPUT:
|
|
fill_cmd(cmd, O_DIVERTED, 0, 2);
|
|
break;
|
|
|
|
case TOK_FRAG:
|
|
fill_cmd(cmd, O_FRAG, 0, 0);
|
|
break;
|
|
|
|
case TOK_LAYER2:
|
|
fill_cmd(cmd, O_LAYER2, 0, 0);
|
|
break;
|
|
|
|
case TOK_XMIT:
|
|
case TOK_RECV:
|
|
case TOK_VIA:
|
|
NEED1("recv, xmit, via require interface name"
|
|
" or address");
|
|
fill_iface((ipfw_insn_if *)cmd, av[0]);
|
|
ac--; av++;
|
|
if (F_LEN(cmd) == 0) /* not a valid address */
|
|
break;
|
|
if (i == TOK_XMIT)
|
|
cmd->opcode = O_XMIT;
|
|
else if (i == TOK_RECV)
|
|
cmd->opcode = O_RECV;
|
|
else if (i == TOK_VIA)
|
|
cmd->opcode = O_VIA;
|
|
break;
|
|
|
|
case TOK_ICMPTYPES:
|
|
NEED1("icmptypes requires list of types");
|
|
fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
|
|
av++; ac--;
|
|
break;
|
|
|
|
case TOK_IPTTL:
|
|
NEED1("ipttl requires TTL");
|
|
if (strpbrk(*av, "-,")) {
|
|
if (!add_ports(cmd, *av, 0, O_IPTTL))
|
|
errx(EX_DATAERR, "invalid ipttl %s", *av);
|
|
} else
|
|
fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_IPID:
|
|
NEED1("ipid requires id");
|
|
if (strpbrk(*av, "-,")) {
|
|
if (!add_ports(cmd, *av, 0, O_IPID))
|
|
errx(EX_DATAERR, "invalid ipid %s", *av);
|
|
} else
|
|
fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_IPLEN:
|
|
NEED1("iplen requires length");
|
|
if (strpbrk(*av, "-,")) {
|
|
if (!add_ports(cmd, *av, 0, O_IPLEN))
|
|
errx(EX_DATAERR, "invalid ip len %s", *av);
|
|
} else
|
|
fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_IPVER:
|
|
NEED1("ipver requires version");
|
|
fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_IPPRECEDENCE:
|
|
NEED1("ipprecedence requires value");
|
|
fill_cmd(cmd, O_IPPRECEDENCE, 0,
|
|
(strtoul(*av, NULL, 0) & 7) << 5);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_IPOPTS:
|
|
NEED1("missing argument for ipoptions");
|
|
fill_flags(cmd, O_IPOPT, f_ipopts, *av);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_IPTOS:
|
|
NEED1("missing argument for iptos");
|
|
fill_flags(cmd, O_IPTOS, f_iptos, *av);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_UID:
|
|
NEED1("uid requires argument");
|
|
{
|
|
char *end;
|
|
uid_t uid;
|
|
struct passwd *pwd;
|
|
|
|
cmd->opcode = O_UID;
|
|
uid = strtoul(*av, &end, 0);
|
|
pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
|
|
if (pwd == NULL)
|
|
errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
|
|
cmd32->d[0] = pwd->pw_uid;
|
|
cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
case TOK_GID:
|
|
NEED1("gid requires argument");
|
|
{
|
|
char *end;
|
|
gid_t gid;
|
|
struct group *grp;
|
|
|
|
cmd->opcode = O_GID;
|
|
gid = strtoul(*av, &end, 0);
|
|
grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
|
|
if (grp == NULL)
|
|
errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
|
|
cmd32->d[0] = grp->gr_gid;
|
|
cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
case TOK_JAIL:
|
|
NEED1("jail requires argument");
|
|
{
|
|
char *end;
|
|
int jid;
|
|
|
|
cmd->opcode = O_JAIL;
|
|
jid = (int)strtol(*av, &end, 0);
|
|
if (jid < 0 || *end != '\0')
|
|
errx(EX_DATAERR, "jail requires prison ID");
|
|
cmd32->d[0] = (uint32_t)jid;
|
|
cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
case TOK_ESTAB:
|
|
fill_cmd(cmd, O_ESTAB, 0, 0);
|
|
break;
|
|
|
|
case TOK_SETUP:
|
|
fill_cmd(cmd, O_TCPFLAGS, 0,
|
|
(TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
|
|
break;
|
|
|
|
case TOK_TCPDATALEN:
|
|
NEED1("tcpdatalen requires length");
|
|
if (strpbrk(*av, "-,")) {
|
|
if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
|
|
errx(EX_DATAERR, "invalid tcpdata len %s", *av);
|
|
} else
|
|
fill_cmd(cmd, O_TCPDATALEN, 0,
|
|
strtoul(*av, NULL, 0));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_TCPOPTS:
|
|
NEED1("missing argument for tcpoptions");
|
|
fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_TCPSEQ:
|
|
case TOK_TCPACK:
|
|
NEED1("tcpseq/tcpack requires argument");
|
|
cmd->len = F_INSN_SIZE(ipfw_insn_u32);
|
|
cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
|
|
cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_TCPWIN:
|
|
NEED1("tcpwin requires length");
|
|
fill_cmd(cmd, O_TCPWIN, 0,
|
|
htons(strtoul(*av, NULL, 0)));
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_TCPFLAGS:
|
|
NEED1("missing argument for tcpflags");
|
|
cmd->opcode = O_TCPFLAGS;
|
|
fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_KEEPSTATE:
|
|
if (open_par)
|
|
errx(EX_USAGE, "keep-state cannot be part "
|
|
"of an or block");
|
|
if (have_state)
|
|
errx(EX_USAGE, "only one of keep-state "
|
|
"and limit is allowed");
|
|
have_state = cmd;
|
|
fill_cmd(cmd, O_KEEP_STATE, 0, 0);
|
|
break;
|
|
|
|
case TOK_LIMIT:
|
|
if (open_par)
|
|
errx(EX_USAGE, "limit cannot be part "
|
|
"of an or block");
|
|
if (have_state)
|
|
errx(EX_USAGE, "only one of keep-state "
|
|
"and limit is allowed");
|
|
NEED1("limit needs mask and # of connections");
|
|
have_state = cmd;
|
|
{
|
|
ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
|
|
|
|
cmd->len = F_INSN_SIZE(ipfw_insn_limit);
|
|
cmd->opcode = O_LIMIT;
|
|
c->limit_mask = 0;
|
|
c->conn_limit = 0;
|
|
for (; ac >1 ;) {
|
|
int val;
|
|
|
|
val = match_token(limit_masks, *av);
|
|
if (val <= 0)
|
|
break;
|
|
c->limit_mask |= val;
|
|
ac--; av++;
|
|
}
|
|
c->conn_limit = atoi(*av);
|
|
if (c->conn_limit == 0)
|
|
errx(EX_USAGE, "limit: limit must be >0");
|
|
if (c->limit_mask == 0)
|
|
errx(EX_USAGE, "missing limit mask");
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
case TOK_PROTO:
|
|
NEED1("missing protocol");
|
|
if (add_proto(cmd, *av)) {
|
|
proto = cmd->arg1;
|
|
ac--; av++;
|
|
} else
|
|
errx(EX_DATAERR, "invalid protocol ``%s''",
|
|
*av);
|
|
break;
|
|
|
|
case TOK_SRCIP:
|
|
NEED1("missing source IP");
|
|
if (add_srcip(cmd, *av)) {
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
case TOK_DSTIP:
|
|
NEED1("missing destination IP");
|
|
if (add_dstip(cmd, *av)) {
|
|
ac--; av++;
|
|
}
|
|
break;
|
|
|
|
case TOK_SRCPORT:
|
|
NEED1("missing source port");
|
|
if (_substrcmp(*av, "any") == 0 ||
|
|
add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
|
|
ac--; av++;
|
|
} else
|
|
errx(EX_DATAERR, "invalid source port %s", *av);
|
|
break;
|
|
|
|
case TOK_DSTPORT:
|
|
NEED1("missing destination port");
|
|
if (_substrcmp(*av, "any") == 0 ||
|
|
add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
|
|
ac--; av++;
|
|
} else
|
|
errx(EX_DATAERR, "invalid destination port %s",
|
|
*av);
|
|
break;
|
|
|
|
case TOK_MAC:
|
|
if (add_mac(cmd, ac, av)) {
|
|
ac -= 2; av += 2;
|
|
}
|
|
break;
|
|
|
|
case TOK_MACTYPE:
|
|
NEED1("missing mac type");
|
|
if (!add_mactype(cmd, ac, *av))
|
|
errx(EX_DATAERR, "invalid mac type %s", *av);
|
|
ac--; av++;
|
|
break;
|
|
|
|
case TOK_VERREVPATH:
|
|
fill_cmd(cmd, O_VERREVPATH, 0, 0);
|
|
break;
|
|
|
|
case TOK_VERSRCREACH:
|
|
fill_cmd(cmd, O_VERSRCREACH, 0, 0);
|
|
break;
|
|
|
|
case TOK_ANTISPOOF:
|
|
fill_cmd(cmd, O_ANTISPOOF, 0, 0);
|
|
break;
|
|
|
|
case TOK_IPSEC:
|
|
fill_cmd(cmd, O_IPSEC, 0, 0);
|
|
break;
|
|
|
|
case TOK_COMMENT:
|
|
fill_comment(cmd, ac, av);
|
|
av += ac;
|
|
ac = 0;
|
|
break;
|
|
|
|
default:
|
|
errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
|
|
}
|
|
if (F_LEN(cmd) > 0) { /* prepare to advance */
|
|
prev = cmd;
|
|
cmd = next_cmd(cmd);
|
|
}
|
|
}
|
|
|
|
done:
|
|
/*
|
|
* Now copy stuff into the rule.
|
|
* If we have a keep-state option, the first instruction
|
|
* must be a PROBE_STATE (which is generated here).
|
|
* If we have a LOG option, it was stored as the first command,
|
|
* and now must be moved to the top of the action part.
|
|
*/
|
|
dst = (ipfw_insn *)rule->cmd;
|
|
|
|
/*
|
|
* First thing to write into the command stream is the match probability.
|
|
*/
|
|
if (match_prob != 1) { /* 1 means always match */
|
|
dst->opcode = O_PROB;
|
|
dst->len = 2;
|
|
*((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
|
|
dst += dst->len;
|
|
}
|
|
|
|
/*
|
|
* generate O_PROBE_STATE if necessary
|
|
*/
|
|
if (have_state && have_state->opcode != O_CHECK_STATE) {
|
|
fill_cmd(dst, O_PROBE_STATE, 0, 0);
|
|
dst = next_cmd(dst);
|
|
}
|
|
/*
|
|
* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ
|
|
*/
|
|
for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
|
|
i = F_LEN(src);
|
|
|
|
switch (src->opcode) {
|
|
case O_LOG:
|
|
case O_KEEP_STATE:
|
|
case O_LIMIT:
|
|
case O_ALTQ:
|
|
break;
|
|
default:
|
|
bcopy(src, dst, i * sizeof(uint32_t));
|
|
dst += i;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* put back the have_state command as last opcode
|
|
*/
|
|
if (have_state && have_state->opcode != O_CHECK_STATE) {
|
|
i = F_LEN(have_state);
|
|
bcopy(have_state, dst, i * sizeof(uint32_t));
|
|
dst += i;
|
|
}
|
|
/*
|
|
* start action section
|
|
*/
|
|
rule->act_ofs = dst - rule->cmd;
|
|
|
|
/*
|
|
* put back O_LOG, O_ALTQ if necessary
|
|
*/
|
|
if (have_log) {
|
|
i = F_LEN(have_log);
|
|
bcopy(have_log, dst, i * sizeof(uint32_t));
|
|
dst += i;
|
|
}
|
|
if (have_altq) {
|
|
i = F_LEN(have_altq);
|
|
bcopy(have_altq, dst, i * sizeof(uint32_t));
|
|
dst += i;
|
|
}
|
|
/*
|
|
* copy all other actions
|
|
*/
|
|
for (src = (ipfw_insn *)actbuf; src != action; src += i) {
|
|
i = F_LEN(src);
|
|
bcopy(src, dst, i * sizeof(uint32_t));
|
|
dst += i;
|
|
}
|
|
|
|
rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
|
|
i = (char *)dst - (char *)rule;
|
|
if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
|
|
err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
|
|
if (!do_quiet)
|
|
show_ipfw(rule, 0, 0);
|
|
}
|
|
|
|
static void
|
|
zero(int ac, char *av[], int optname /* IP_FW_ZERO or IP_FW_RESETLOG */)
|
|
{
|
|
int rulenum;
|
|
int failed = EX_OK;
|
|
char const *name = optname == IP_FW_ZERO ? "ZERO" : "RESETLOG";
|
|
|
|
av++; ac--;
|
|
|
|
if (!ac) {
|
|
/* clear all entries */
|
|
if (do_cmd(optname, NULL, 0) < 0)
|
|
err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
|
|
if (!do_quiet)
|
|
printf("%s.\n", optname == IP_FW_ZERO ?
|
|
"Accounting cleared":"Logging counts reset");
|
|
|
|
return;
|
|
}
|
|
|
|
while (ac) {
|
|
/* Rule number */
|
|
if (isdigit(**av)) {
|
|
rulenum = atoi(*av);
|
|
av++;
|
|
ac--;
|
|
if (do_cmd(optname, &rulenum, sizeof rulenum)) {
|
|
warn("rule %u: setsockopt(IP_FW_%s)",
|
|
rulenum, name);
|
|
failed = EX_UNAVAILABLE;
|
|
} else if (!do_quiet)
|
|
printf("Entry %d %s.\n", rulenum,
|
|
optname == IP_FW_ZERO ?
|
|
"cleared" : "logging count reset");
|
|
} else {
|
|
errx(EX_USAGE, "invalid rule number ``%s''", *av);
|
|
}
|
|
}
|
|
if (failed != EX_OK)
|
|
exit(failed);
|
|
}
|
|
|
|
static void
|
|
flush(int force)
|
|
{
|
|
int cmd = do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
|
|
|
|
if (!force && !do_quiet) { /* need to ask user */
|
|
int c;
|
|
|
|
printf("Are you sure? [yn] ");
|
|
fflush(stdout);
|
|
do {
|
|
c = toupper(getc(stdin));
|
|
while (c != '\n' && getc(stdin) != '\n')
|
|
if (feof(stdin))
|
|
return; /* and do not flush */
|
|
} while (c != 'Y' && c != 'N');
|
|
printf("\n");
|
|
if (c == 'N') /* user said no */
|
|
return;
|
|
}
|
|
if (do_cmd(cmd, NULL, 0) < 0)
|
|
err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
|
|
do_pipe ? "DUMMYNET" : "FW");
|
|
if (!do_quiet)
|
|
printf("Flushed all %s.\n", do_pipe ? "pipes" : "rules");
|
|
}
|
|
|
|
/*
|
|
* Free a the (locally allocated) copy of command line arguments.
|
|
*/
|
|
static void
|
|
free_args(int ac, char **av)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i < ac; i++)
|
|
free(av[i]);
|
|
free(av);
|
|
}
|
|
|
|
/*
|
|
* This one handles all table-related commands
|
|
* ipfw table N add addr[/masklen] [value]
|
|
* ipfw table N delete addr[/masklen]
|
|
* ipfw table N flush
|
|
* ipfw table N list
|
|
*/
|
|
static void
|
|
table_handler(int ac, char *av[])
|
|
{
|
|
ipfw_table_entry ent;
|
|
ipfw_table *tbl;
|
|
int do_add;
|
|
char *p;
|
|
socklen_t l;
|
|
uint32_t a;
|
|
|
|
ac--; av++;
|
|
if (ac && isdigit(**av)) {
|
|
ent.tbl = atoi(*av);
|
|
ac--; av++;
|
|
} else
|
|
errx(EX_USAGE, "table number required");
|
|
NEED1("table needs command");
|
|
if (_substrcmp(*av, "add") == 0 ||
|
|
_substrcmp(*av, "delete") == 0) {
|
|
do_add = **av == 'a';
|
|
ac--; av++;
|
|
if (!ac)
|
|
errx(EX_USAGE, "IP address required");
|
|
p = strchr(*av, '/');
|
|
if (p) {
|
|
*p++ = '\0';
|
|
ent.masklen = atoi(p);
|
|
if (ent.masklen > 32)
|
|
errx(EX_DATAERR, "bad width ``%s''", p);
|
|
} else
|
|
ent.masklen = 32;
|
|
if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
|
|
errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
|
|
ac--; av++;
|
|
if (do_add && ac)
|
|
ent.value = strtoul(*av, NULL, 0);
|
|
else
|
|
ent.value = 0;
|
|
if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
|
|
&ent, sizeof(ent)) < 0)
|
|
err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
|
|
do_add ? "ADD" : "DEL");
|
|
} else if (_substrcmp(*av, "flush") == 0) {
|
|
if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, sizeof(ent.tbl)) < 0)
|
|
err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
|
|
} else if (_substrcmp(*av, "list") == 0) {
|
|
a = ent.tbl;
|
|
l = sizeof(a);
|
|
if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
|
|
err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
|
|
l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
|
|
tbl = malloc(l);
|
|
if (tbl == NULL)
|
|
err(EX_OSERR, "malloc");
|
|
tbl->tbl = ent.tbl;
|
|
if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
|
|
err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
|
|
for (a = 0; a < tbl->cnt; a++) {
|
|
printf("%s/%u %u\n",
|
|
inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
|
|
tbl->ent[a].masklen, tbl->ent[a].value);
|
|
}
|
|
} else
|
|
errx(EX_USAGE, "invalid table command %s", *av);
|
|
}
|
|
|
|
/*
|
|
* Called with the arguments (excluding program name).
|
|
* Returns 0 if successful, 1 if empty command, errx() in case of errors.
|
|
*/
|
|
static int
|
|
ipfw_main(int oldac, char **oldav)
|
|
{
|
|
int ch, ac, save_ac;
|
|
char **av, **save_av;
|
|
int do_acct = 0; /* Show packet/byte count */
|
|
|
|
#define WHITESP " \t\f\v\n\r"
|
|
if (oldac == 0)
|
|
return 1;
|
|
else if (oldac == 1) {
|
|
/*
|
|
* If we are called with a single string, try to split it into
|
|
* arguments for subsequent parsing.
|
|
* But first, remove spaces after a ',', by copying the string
|
|
* in-place.
|
|
*/
|
|
char *arg = oldav[0]; /* The string... */
|
|
int l = strlen(arg);
|
|
int copy = 0; /* 1 if we need to copy, 0 otherwise */
|
|
int i, j;
|
|
for (i = j = 0; i < l; i++) {
|
|
if (arg[i] == '#') /* comment marker */
|
|
break;
|
|
if (copy) {
|
|
arg[j++] = arg[i];
|
|
copy = !index("," WHITESP, arg[i]);
|
|
} else {
|
|
copy = !index(WHITESP, arg[i]);
|
|
if (copy)
|
|
arg[j++] = arg[i];
|
|
}
|
|
}
|
|
if (!copy && j > 0) /* last char was a 'blank', remove it */
|
|
j--;
|
|
l = j; /* the new argument length */
|
|
arg[j++] = '\0';
|
|
if (l == 0) /* empty string! */
|
|
return 1;
|
|
|
|
/*
|
|
* First, count number of arguments. Because of the previous
|
|
* processing, this is just the number of blanks plus 1.
|
|
*/
|
|
for (i = 0, ac = 1; i < l; i++)
|
|
if (index(WHITESP, arg[i]) != NULL)
|
|
ac++;
|
|
|
|
av = calloc(ac, sizeof(char *));
|
|
|
|
/*
|
|
* Second, copy arguments from cmd[] to av[]. For each one,
|
|
* j is the initial character, i is the one past the end.
|
|
*/
|
|
for (ac = 0, i = j = 0; i < l; i++)
|
|
if (index(WHITESP, arg[i]) != NULL || i == l-1) {
|
|
if (i == l-1)
|
|
i++;
|
|
av[ac] = calloc(i-j+1, 1);
|
|
bcopy(arg+j, av[ac], i-j);
|
|
ac++;
|
|
j = i + 1;
|
|
}
|
|
} else {
|
|
/*
|
|
* If an argument ends with ',' join with the next one.
|
|
*/
|
|
int first, i, l;
|
|
|
|
av = calloc(oldac, sizeof(char *));
|
|
for (first = i = ac = 0, l = 0; i < oldac; i++) {
|
|
char *arg = oldav[i];
|
|
int k = strlen(arg);
|
|
|
|
l += k;
|
|
if (arg[k-1] != ',' || i == oldac-1) {
|
|
/* Time to copy. */
|
|
av[ac] = calloc(l+1, 1);
|
|
for (l=0; first <= i; first++) {
|
|
strcat(av[ac]+l, oldav[first]);
|
|
l += strlen(oldav[first]);
|
|
}
|
|
ac++;
|
|
l = 0;
|
|
first = i+1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set the force flag for non-interactive processes */
|
|
if (!do_force)
|
|
do_force = !isatty(STDIN_FILENO);
|
|
|
|
/* Save arguments for final freeing of memory. */
|
|
save_ac = ac;
|
|
save_av = av;
|
|
|
|
optind = optreset = 0;
|
|
while ((ch = getopt(ac, av, "abcdefhnNqs:STtv")) != -1)
|
|
switch (ch) {
|
|
case 'a':
|
|
do_acct = 1;
|
|
break;
|
|
|
|
case 'b':
|
|
comment_only = 1;
|
|
do_compact = 1;
|
|
break;
|
|
|
|
case 'c':
|
|
do_compact = 1;
|
|
break;
|
|
|
|
case 'd':
|
|
do_dynamic = 1;
|
|
break;
|
|
|
|
case 'e':
|
|
do_expired = 1;
|
|
break;
|
|
|
|
case 'f':
|
|
do_force = 1;
|
|
break;
|
|
|
|
case 'h': /* help */
|
|
free_args(save_ac, save_av);
|
|
help();
|
|
break; /* NOTREACHED */
|
|
|
|
case 'n':
|
|
test_only = 1;
|
|
break;
|
|
|
|
case 'N':
|
|
do_resolv = 1;
|
|
break;
|
|
|
|
case 'q':
|
|
do_quiet = 1;
|
|
break;
|
|
|
|
case 's': /* sort */
|
|
do_sort = atoi(optarg);
|
|
break;
|
|
|
|
case 'S':
|
|
show_sets = 1;
|
|
break;
|
|
|
|
case 't':
|
|
do_time = 1;
|
|
break;
|
|
|
|
case 'T':
|
|
do_time = 2; /* numeric timestamp */
|
|
break;
|
|
|
|
case 'v': /* verbose */
|
|
verbose = 1;
|
|
break;
|
|
|
|
default:
|
|
free_args(save_ac, save_av);
|
|
return 1;
|
|
}
|
|
|
|
ac -= optind;
|
|
av += optind;
|
|
NEED1("bad arguments, for usage summary ``ipfw''");
|
|
|
|
/*
|
|
* An undocumented behaviour of ipfw1 was to allow rule numbers first,
|
|
* e.g. "100 add allow ..." instead of "add 100 allow ...".
|
|
* In case, swap first and second argument to get the normal form.
|
|
*/
|
|
if (ac > 1 && isdigit(*av[0])) {
|
|
char *p = av[0];
|
|
|
|
av[0] = av[1];
|
|
av[1] = p;
|
|
}
|
|
|
|
/*
|
|
* optional: pipe or queue
|
|
*/
|
|
do_pipe = 0;
|
|
if (_substrcmp(*av, "pipe") == 0)
|
|
do_pipe = 1;
|
|
else if (_substrcmp(*av, "queue") == 0)
|
|
do_pipe = 2;
|
|
if (do_pipe) {
|
|
ac--;
|
|
av++;
|
|
}
|
|
NEED1("missing command");
|
|
|
|
/*
|
|
* For pipes and queues we normally say 'pipe NN config'
|
|
* but the code is easier to parse as 'pipe config NN'
|
|
* so we swap the two arguments.
|
|
*/
|
|
if (do_pipe > 0 && ac > 1 && isdigit(*av[0])) {
|
|
char *p = av[0];
|
|
|
|
av[0] = av[1];
|
|
av[1] = p;
|
|
}
|
|
|
|
if (_substrcmp(*av, "add") == 0)
|
|
add(ac, av);
|
|
else if (do_pipe && _substrcmp(*av, "config") == 0)
|
|
config_pipe(ac, av);
|
|
else if (_substrcmp(*av, "delete") == 0)
|
|
delete(ac, av);
|
|
else if (_substrcmp(*av, "flush") == 0)
|
|
flush(do_force);
|
|
else if (_substrcmp(*av, "zero") == 0)
|
|
zero(ac, av, IP_FW_ZERO);
|
|
else if (_substrcmp(*av, "resetlog") == 0)
|
|
zero(ac, av, IP_FW_RESETLOG);
|
|
else if (_substrcmp(*av, "print") == 0 ||
|
|
_substrcmp(*av, "list") == 0)
|
|
list(ac, av, do_acct);
|
|
else if (_substrcmp(*av, "set") == 0)
|
|
sets_handler(ac, av);
|
|
else if (_substrcmp(*av, "table") == 0)
|
|
table_handler(ac, av);
|
|
else if (_substrcmp(*av, "enable") == 0)
|
|
sysctl_handler(ac, av, 1);
|
|
else if (_substrcmp(*av, "disable") == 0)
|
|
sysctl_handler(ac, av, 0);
|
|
else if (_substrcmp(*av, "show") == 0)
|
|
list(ac, av, 1 /* show counters */);
|
|
else
|
|
errx(EX_USAGE, "bad command `%s'", *av);
|
|
|
|
/* Free memory allocated in the argument parsing. */
|
|
free_args(save_ac, save_av);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
ipfw_readfile(int ac, char *av[])
|
|
{
|
|
#define MAX_ARGS 32
|
|
char buf[BUFSIZ];
|
|
char *cmd = NULL, *filename = av[ac-1];
|
|
int c, lineno=0;
|
|
FILE *f = NULL;
|
|
pid_t preproc = 0;
|
|
|
|
filename = av[ac-1];
|
|
|
|
while ((c = getopt(ac, av, "cfNnp:qS")) != -1) {
|
|
switch(c) {
|
|
case 'c':
|
|
do_compact = 1;
|
|
break;
|
|
|
|
case 'f':
|
|
do_force = 1;
|
|
break;
|
|
|
|
case 'N':
|
|
do_resolv = 1;
|
|
break;
|
|
|
|
case 'n':
|
|
test_only = 1;
|
|
break;
|
|
|
|
case 'p':
|
|
cmd = optarg;
|
|
/*
|
|
* Skip previous args and delete last one, so we
|
|
* pass all but the last argument to the preprocessor
|
|
* via av[optind-1]
|
|
*/
|
|
av += optind - 1;
|
|
ac -= optind - 1;
|
|
av[ac-1] = NULL;
|
|
fprintf(stderr, "command is %s\n", av[0]);
|
|
break;
|
|
|
|
case 'q':
|
|
do_quiet = 1;
|
|
break;
|
|
|
|
case 'S':
|
|
show_sets = 1;
|
|
break;
|
|
|
|
default:
|
|
errx(EX_USAGE, "bad arguments, for usage"
|
|
" summary ``ipfw''");
|
|
}
|
|
|
|
if (cmd != NULL)
|
|
break;
|
|
}
|
|
|
|
if (cmd == NULL && ac != optind + 1) {
|
|
fprintf(stderr, "ac %d, optind %d\n", ac, optind);
|
|
errx(EX_USAGE, "extraneous filename arguments");
|
|
}
|
|
|
|
if ((f = fopen(filename, "r")) == NULL)
|
|
err(EX_UNAVAILABLE, "fopen: %s", filename);
|
|
|
|
if (cmd != NULL) { /* pipe through preprocessor */
|
|
int pipedes[2];
|
|
|
|
if (pipe(pipedes) == -1)
|
|
err(EX_OSERR, "cannot create pipe");
|
|
|
|
preproc = fork();
|
|
if (preproc == -1)
|
|
err(EX_OSERR, "cannot fork");
|
|
|
|
if (preproc == 0) {
|
|
/*
|
|
* Child, will run the preprocessor with the
|
|
* file on stdin and the pipe on stdout.
|
|
*/
|
|
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, av);
|
|
err(EX_OSERR, "execvp(%s) failed", cmd);
|
|
} else { /* parent, will reopen f as the pipe */
|
|
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)) { /* read commands */
|
|
char linename[10];
|
|
char *args[1];
|
|
|
|
lineno++;
|
|
sprintf(linename, "Line %d", lineno);
|
|
setprogname(linename); /* XXX */
|
|
args[0] = buf;
|
|
ipfw_main(1, args);
|
|
}
|
|
fclose(f);
|
|
if (cmd != NULL) {
|
|
int status;
|
|
|
|
if (waitpid(preproc, &status, 0) == -1)
|
|
errx(EX_OSERR, "waitpid()");
|
|
if (WIFEXITED(status) && 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));
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int ac, char *av[])
|
|
{
|
|
/*
|
|
* If the last argument is an absolute pathname, interpret it
|
|
* as a file to be preprocessed.
|
|
*/
|
|
|
|
if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0)
|
|
ipfw_readfile(ac, av);
|
|
else {
|
|
if (ipfw_main(ac-1, av+1))
|
|
show_usage();
|
|
}
|
|
return EX_OK;
|
|
}
|