ipfw2.c revision 332762
10SN/A/* 2662Savstepan * Copyright (c) 2002-2003 Luigi Rizzo 30SN/A * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 40SN/A * Copyright (c) 1994 Ugen J.S.Antsilevich 50SN/A * 60SN/A * Idea and grammar partially left from: 7157SN/A * Copyright (c) 1993 Daniel Boulet 80SN/A * 9157SN/A * Redistribution and use in source forms, with and without modification, 100SN/A * are permitted provided that this entire comment appears intact. 110SN/A * 120SN/A * Redistribution in binary form may occur without any restrictions. 130SN/A * Obviously, it would be nice if you gave credit where credit is due 140SN/A * but requiring it would be too onerous. 150SN/A * 160SN/A * This software is provided ``AS IS'' without any warranties of any kind. 170SN/A * 180SN/A * NEW command line interface for IP firewall facility 190SN/A * 200SN/A * $FreeBSD: stable/11/sbin/ipfw/ipfw2.c 332762 2018-04-19 10:05:12Z ae $ 21157SN/A */ 22157SN/A 23157SN/A#include <sys/types.h> 240SN/A#include <sys/param.h> 250SN/A#include <sys/socket.h> 260SN/A#include <sys/sockio.h> 270SN/A#include <sys/sysctl.h> 280SN/A 290SN/A#include "ipfw2.h" 300SN/A 310SN/A#include <ctype.h> 320SN/A#include <err.h> 330SN/A#include <errno.h> 340SN/A#include <grp.h> 350SN/A#include <netdb.h> 360SN/A#include <pwd.h> 370SN/A#include <stdio.h> 380SN/A#include <stdarg.h> 390SN/A#include <stdint.h> 400SN/A#include <stdlib.h> 410SN/A#include <string.h> 420SN/A#include <sysexits.h> 430SN/A#include <time.h> /* ctime */ 440SN/A#include <timeconv.h> /* _long_to_time */ 450SN/A#include <unistd.h> 460SN/A#include <fcntl.h> 470SN/A#include <stddef.h> /* offsetof */ 480SN/A 490SN/A#include <net/ethernet.h> 500SN/A#include <net/if.h> /* only IFNAMSIZ */ 510SN/A#include <netinet/in.h> 520SN/A#include <netinet/in_systm.h> /* only n_short, n_long */ 530SN/A#include <netinet/ip.h> 540SN/A#include <netinet/ip_icmp.h> 55662Savstepan#include <netinet/ip_fw.h> 560SN/A#include <netinet/tcp.h> 570SN/A#include <arpa/inet.h> 580SN/A 590SN/Astruct cmdline_opts co; /* global options */ 600SN/A 610SN/Astruct format_opts { 620SN/A int bcwidth; 630SN/A int pcwidth; 640SN/A int show_counters; 650SN/A int show_time; /* show timestamp */ 660SN/A uint32_t set_mask; /* enabled sets mask */ 670SN/A uint32_t flags; /* request flags */ 680SN/A uint32_t first; /* first rule to request */ 690SN/A uint32_t last; /* last rule to request */ 700SN/A uint32_t dcnt; /* number of dynamic states */ 710SN/A ipfw_obj_ctlv *tstate; /* table state data */ 720SN/A}; 730SN/A 740SN/Aint resvd_set_number = RESVD_SET; 750SN/A 760SN/Aint ipfw_socket = -1; 770SN/A 780SN/A#define CHECK_LENGTH(v, len) do { \ 790SN/A if ((v) < (len)) \ 800SN/A errx(EX_DATAERR, "Rule too long"); \ 810SN/A } while (0) 820SN/A/* 830SN/A * Check if we have enough space in cmd buffer. Note that since 840SN/A * first 8? u32 words are reserved by reserved header, full cmd 850SN/A * buffer can't be used, so we need to protect from buffer overrun 860SN/A * only. At the beginning, cblen is less than actual buffer size by 870SN/A * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 880SN/A * for checking small instructions fitting in given range. 890SN/A * We also (ab)use the fact that ipfw_insn is always the first field 900SN/A * for any custom instruction. 910SN/A */ 920SN/A#define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 930SN/A 940SN/A#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 950SN/A if (!av[0]) \ 960SN/A errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 970SN/A if (_substrcmp(*av, "tablearg") == 0) { \ 980SN/A arg = IP_FW_TARG; \ 990SN/A break; \ 1000SN/A } \ 1010SN/A \ 1020SN/A { \ 1030SN/A long _xval; \ 1040SN/A char *end; \ 1050SN/A \ 1060SN/A _xval = strtol(*av, &end, 10); \ 1070SN/A \ 1080SN/A if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 1090SN/A errx(EX_DATAERR, "%s: invalid argument: %s", \ 1100SN/A match_value(s_x, tok), *av); \ 1110SN/A \ 1120SN/A if (errno == ERANGE || _xval < min || _xval > max) \ 1130SN/A errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 1140SN/A match_value(s_x, tok), min, max, *av); \ 1150SN/A \ 1160SN/A if (_xval == IP_FW_TARG) \ 1170SN/A errx(EX_DATAERR, "%s: illegal argument value: %s", \ 1180SN/A match_value(s_x, tok), *av); \ 1190SN/A arg = _xval; \ 1200SN/A } \ 1210SN/A} while (0) 1220SN/A 1230SN/Astatic struct _s_x f_tcpflags[] = { 1240SN/A { "syn", TH_SYN }, 1250SN/A { "fin", TH_FIN }, 1260SN/A { "ack", TH_ACK }, 1270SN/A { "psh", TH_PUSH }, 1280SN/A { "rst", TH_RST }, 1290SN/A { "urg", TH_URG }, 1300SN/A { "tcp flag", 0 }, 1310SN/A { NULL, 0 } 1320SN/A}; 1330SN/A 1340SN/Astatic struct _s_x f_tcpopts[] = { 1350SN/A { "mss", IP_FW_TCPOPT_MSS }, 1360SN/A { "maxseg", IP_FW_TCPOPT_MSS }, 1370SN/A { "window", IP_FW_TCPOPT_WINDOW }, 1380SN/A { "sack", IP_FW_TCPOPT_SACK }, 1390SN/A { "ts", IP_FW_TCPOPT_TS }, 1400SN/A { "timestamp", IP_FW_TCPOPT_TS }, 1410SN/A { "cc", IP_FW_TCPOPT_CC }, 1420SN/A { "tcp option", 0 }, 1430SN/A { NULL, 0 } 1440SN/A}; 1450SN/A 1460SN/A/* 1470SN/A * IP options span the range 0 to 255 so we need to remap them 1480SN/A * (though in fact only the low 5 bits are significant). 1490SN/A */ 1500SN/Astatic struct _s_x f_ipopts[] = { 1510SN/A { "ssrr", IP_FW_IPOPT_SSRR}, 1520SN/A { "lsrr", IP_FW_IPOPT_LSRR}, 1530SN/A { "rr", IP_FW_IPOPT_RR}, 1540SN/A { "ts", IP_FW_IPOPT_TS}, 1550SN/A { "ip option", 0 }, 1560SN/A { NULL, 0 } 1570SN/A}; 1580SN/A 1590SN/Astatic struct _s_x f_iptos[] = { 1600SN/A { "lowdelay", IPTOS_LOWDELAY}, 1610SN/A { "throughput", IPTOS_THROUGHPUT}, 1620SN/A { "reliability", IPTOS_RELIABILITY}, 1630SN/A { "mincost", IPTOS_MINCOST}, 1640SN/A { "congestion", IPTOS_ECN_CE}, 1650SN/A { "ecntransport", IPTOS_ECN_ECT0}, 1660SN/A { "ip tos option", 0}, 1670SN/A { NULL, 0 } 1680SN/A}; 1690SN/A 1700SN/Astruct _s_x f_ipdscp[] = { 1710SN/A { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 1720SN/A { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 1730SN/A { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 1740SN/A { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 1750SN/A { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 1760SN/A { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 1770SN/A { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 1780SN/A { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 1790SN/A { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 1800SN/A { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 1810SN/A { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 1820SN/A { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 1830SN/A { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 1840SN/A { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 1850SN/A { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 1860SN/A { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 1870SN/A { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 1880SN/A { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 1890SN/A { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 1900SN/A { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 1910SN/A { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 1920SN/A { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 1930SN/A { NULL, 0 } 1940SN/A}; 1950SN/A 1960SN/Astatic struct _s_x limit_masks[] = { 1970SN/A {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 1980SN/A {"src-addr", DYN_SRC_ADDR}, 1990SN/A {"src-port", DYN_SRC_PORT}, 2000SN/A {"dst-addr", DYN_DST_ADDR}, 2010SN/A {"dst-port", DYN_DST_PORT}, 2020SN/A {NULL, 0} 2030SN/A}; 2040SN/A 2050SN/A/* 2060SN/A * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 2070SN/A * This is only used in this code. 2080SN/A */ 2090SN/A#define IPPROTO_ETHERTYPE 0x1000 2100SN/Astatic struct _s_x ether_types[] = { 2110SN/A /* 2120SN/A * Note, we cannot use "-:&/" in the names because they are field 2130SN/A * separators in the type specifications. Also, we use s = NULL as 2140SN/A * end-delimiter, because a type of 0 can be legal. 2150SN/A */ 2160SN/A { "ip", 0x0800 }, 2170SN/A { "ipv4", 0x0800 }, 2180SN/A { "ipv6", 0x86dd }, 2190SN/A { "arp", 0x0806 }, 2200SN/A { "rarp", 0x8035 }, 2210SN/A { "vlan", 0x8100 }, 2220SN/A { "loop", 0x9000 }, 2230SN/A { "trail", 0x1000 }, 2240SN/A { "at", 0x809b }, 2250SN/A { "atalk", 0x809b }, 2260SN/A { "aarp", 0x80f3 }, 2270SN/A { "pppoe_disc", 0x8863 }, 2280SN/A { "pppoe_sess", 0x8864 }, 2290SN/A { "ipx_8022", 0x00E0 }, 2300SN/A { "ipx_8023", 0x0000 }, 2310SN/A { "ipx_ii", 0x8137 }, 2320SN/A { "ipx_snap", 0x8137 }, 2330SN/A { "ipx", 0x8137 }, 2340SN/A { "ns", 0x0600 }, 2350SN/A { NULL, 0 } 2360SN/A}; 2370SN/A 2380SN/Astatic struct _s_x rule_eactions[] = { 2390SN/A { "nat64lsn", TOK_NAT64LSN }, 2400SN/A { "nat64stl", TOK_NAT64STL }, 2410SN/A { "nptv6", TOK_NPTV6 }, 2420SN/A { "tcp-setmss", TOK_TCPSETMSS }, 2430SN/A { NULL, 0 } /* terminator */ 2440SN/A}; 2450SN/A 2460SN/Astatic struct _s_x rule_actions[] = { 2470SN/A { "abort6", TOK_ABORT6 }, 2480SN/A { "abort", TOK_ABORT }, 2490SN/A { "accept", TOK_ACCEPT }, 2500SN/A { "pass", TOK_ACCEPT }, 2510SN/A { "allow", TOK_ACCEPT }, 2520SN/A { "permit", TOK_ACCEPT }, 2530SN/A { "count", TOK_COUNT }, 2540SN/A { "pipe", TOK_PIPE }, 2550SN/A { "queue", TOK_QUEUE }, 2560SN/A { "divert", TOK_DIVERT }, 2570SN/A { "tee", TOK_TEE }, 2580SN/A { "netgraph", TOK_NETGRAPH }, 2590SN/A { "ngtee", TOK_NGTEE }, 2600SN/A { "fwd", TOK_FORWARD }, 2610SN/A { "forward", TOK_FORWARD }, 2620SN/A { "skipto", TOK_SKIPTO }, 2630SN/A { "deny", TOK_DENY }, 2640SN/A { "drop", TOK_DENY }, 2650SN/A { "reject", TOK_REJECT }, 2660SN/A { "reset6", TOK_RESET6 }, 2670SN/A { "reset", TOK_RESET }, 2680SN/A { "unreach6", TOK_UNREACH6 }, 2690SN/A { "unreach", TOK_UNREACH }, 2700SN/A { "check-state", TOK_CHECKSTATE }, 2710SN/A { "//", TOK_COMMENT }, 2720SN/A { "nat", TOK_NAT }, 2730SN/A { "reass", TOK_REASS }, 2740SN/A { "setfib", TOK_SETFIB }, 2750SN/A { "setdscp", TOK_SETDSCP }, 2760SN/A { "call", TOK_CALL }, 2770SN/A { "return", TOK_RETURN }, 2780SN/A { "eaction", TOK_EACTION }, 2790SN/A { "tcp-setmss", TOK_TCPSETMSS }, 2800SN/A { NULL, 0 } /* terminator */ 2810SN/A}; 2820SN/A 2830SN/Astatic struct _s_x rule_action_params[] = { 2840SN/A { "altq", TOK_ALTQ }, 2850SN/A { "log", TOK_LOG }, 2860SN/A { "tag", TOK_TAG }, 2870SN/A { "untag", TOK_UNTAG }, 2880SN/A { NULL, 0 } /* terminator */ 2890SN/A}; 2900SN/A 2910SN/A/* 2920SN/A * The 'lookup' instruction accepts one of the following arguments. 2930SN/A * -1 is a terminator for the list. 2940SN/A * Arguments are passed as v[1] in O_DST_LOOKUP options. 2950SN/A */ 2960SN/Astatic int lookup_key[] = { 2970SN/A TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 2980SN/A TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 2990SN/A 3000SN/Astatic struct _s_x rule_options[] = { 3010SN/A { "tagged", TOK_TAGGED }, 3020SN/A { "uid", TOK_UID }, 3030SN/A { "gid", TOK_GID }, 3040SN/A { "jail", TOK_JAIL }, 3050SN/A { "in", TOK_IN }, 3060SN/A { "limit", TOK_LIMIT }, 3070SN/A { "keep-state", TOK_KEEPSTATE }, 3080SN/A { "bridged", TOK_LAYER2 }, 3090SN/A { "layer2", TOK_LAYER2 }, 3100SN/A { "out", TOK_OUT }, 3110SN/A { "diverted", TOK_DIVERTED }, 3120SN/A { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 3130SN/A { "diverted-output", TOK_DIVERTEDOUTPUT }, 3140SN/A { "xmit", TOK_XMIT }, 3150SN/A { "recv", TOK_RECV }, 3160SN/A { "via", TOK_VIA }, 3170SN/A { "fragment", TOK_FRAG }, 3180SN/A { "frag", TOK_FRAG }, 3190SN/A { "fib", TOK_FIB }, 3200SN/A { "ipoptions", TOK_IPOPTS }, 3210SN/A { "ipopts", TOK_IPOPTS }, 3220SN/A { "iplen", TOK_IPLEN }, 3230SN/A { "ipid", TOK_IPID }, 3240SN/A { "ipprecedence", TOK_IPPRECEDENCE }, 3250SN/A { "dscp", TOK_DSCP }, 3260SN/A { "iptos", TOK_IPTOS }, 3270SN/A { "ipttl", TOK_IPTTL }, 3280SN/A { "ipversion", TOK_IPVER }, 3290SN/A { "ipver", TOK_IPVER }, 3300SN/A { "estab", TOK_ESTAB }, 3310SN/A { "established", TOK_ESTAB }, 3320SN/A { "setup", TOK_SETUP }, 3330SN/A { "sockarg", TOK_SOCKARG }, 3340SN/A { "tcpdatalen", TOK_TCPDATALEN }, 3350SN/A { "tcpflags", TOK_TCPFLAGS }, 3360SN/A { "tcpflgs", TOK_TCPFLAGS }, 3370SN/A { "tcpoptions", TOK_TCPOPTS }, 3380SN/A { "tcpopts", TOK_TCPOPTS }, 3390SN/A { "tcpseq", TOK_TCPSEQ }, 3400SN/A { "tcpack", TOK_TCPACK }, 3410SN/A { "tcpwin", TOK_TCPWIN }, 3420SN/A { "icmptype", TOK_ICMPTYPES }, 3430SN/A { "icmptypes", TOK_ICMPTYPES }, 3440SN/A { "dst-ip", TOK_DSTIP }, 3450SN/A { "src-ip", TOK_SRCIP }, 3460SN/A { "dst-port", TOK_DSTPORT }, 3470SN/A { "src-port", TOK_SRCPORT }, 3480SN/A { "proto", TOK_PROTO }, 3490SN/A { "MAC", TOK_MAC }, 3500SN/A { "mac", TOK_MAC }, 3510SN/A { "mac-type", TOK_MACTYPE }, 3520SN/A { "verrevpath", TOK_VERREVPATH }, 3530SN/A { "versrcreach", TOK_VERSRCREACH }, 3540SN/A { "antispoof", TOK_ANTISPOOF }, 3550SN/A { "ipsec", TOK_IPSEC }, 3560SN/A { "icmp6type", TOK_ICMP6TYPES }, 3570SN/A { "icmp6types", TOK_ICMP6TYPES }, 3580SN/A { "ext6hdr", TOK_EXT6HDR}, 3590SN/A { "flow-id", TOK_FLOWID}, 3600SN/A { "ipv6", TOK_IPV6}, 3610SN/A { "ip6", TOK_IPV6}, 3620SN/A { "ipv4", TOK_IPV4}, 3630SN/A { "ip4", TOK_IPV4}, 3640SN/A { "dst-ipv6", TOK_DSTIP6}, 3650SN/A { "dst-ip6", TOK_DSTIP6}, 3660SN/A { "src-ipv6", TOK_SRCIP6}, 3670SN/A { "src-ip6", TOK_SRCIP6}, 3680SN/A { "lookup", TOK_LOOKUP}, 3690SN/A { "flow", TOK_FLOW}, 3700SN/A { "//", TOK_COMMENT }, 3710SN/A 3720SN/A { "not", TOK_NOT }, /* pseudo option */ 3730SN/A { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 3740SN/A { "or", TOK_OR }, /* pseudo option */ 3750SN/A { "|", /* escape */ TOK_OR }, /* pseudo option */ 3760SN/A { "{", TOK_STARTBRACE }, /* pseudo option */ 3770SN/A { "(", TOK_STARTBRACE }, /* pseudo option */ 3780SN/A { "}", TOK_ENDBRACE }, /* pseudo option */ 3790SN/A { ")", TOK_ENDBRACE }, /* pseudo option */ 3800SN/A { NULL, 0 } /* terminator */ 3810SN/A}; 3820SN/A 3830SN/Avoid bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 3840SN/Astatic int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 3850SN/A ipfw_cfg_lheader **pcfg, size_t *psize); 3860SN/Astatic int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 3870SN/A ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 3880SN/Astatic void ipfw_list_tifaces(void); 3890SN/A 3900SN/Astruct tidx; 3910SN/Astatic uint16_t pack_object(struct tidx *tstate, char *name, int otype); 3920SN/Astatic uint16_t pack_table(struct tidx *tstate, char *name); 3930SN/A 3940SN/Astatic char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 3950SN/Astatic void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 3960SN/Astatic char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 3970SN/A uint16_t type); 3980SN/A 3990SN/A/* 4000SN/A * Simple string buffer API. 4010SN/A * Used to simplify buffer passing between function and for 4020SN/A * transparent overrun handling. 4030SN/A */ 4040SN/A 4050SN/A/* 4060SN/A * Allocates new buffer of given size @sz. 4070SN/A * 4080SN/A * Returns 0 on success. 4090SN/A */ 4100SN/Aint 4110SN/Abp_alloc(struct buf_pr *b, size_t size) 4120SN/A{ 4130SN/A memset(b, 0, sizeof(struct buf_pr)); 4140SN/A 4150SN/A if ((b->buf = calloc(1, size)) == NULL) 4160SN/A return (ENOMEM); 4170SN/A 4180SN/A b->ptr = b->buf; 4190SN/A b->size = size; 4200SN/A b->avail = b->size; 4210SN/A 4220SN/A return (0); 4230SN/A} 4240SN/A 4250SN/Avoid 4260SN/Abp_free(struct buf_pr *b) 4270SN/A{ 4280SN/A 4290SN/A free(b->buf); 4300SN/A} 4310SN/A 4320SN/A/* 4330SN/A * Flushes buffer so new writer start from beginning. 4340SN/A */ 4350SN/Avoid 4360SN/Abp_flush(struct buf_pr *b) 4370SN/A{ 4380SN/A 4390SN/A b->ptr = b->buf; 4400SN/A b->avail = b->size; 4410SN/A b->buf[0] = '\0'; 4420SN/A} 4430SN/A 4440SN/A/* 4450SN/A * Print message specified by @format and args. 4460SN/A * Automatically manage buffer space and transparently handle 4470SN/A * buffer overruns. 4480SN/A * 4490SN/A * Returns number of bytes that should have been printed. 4500SN/A */ 4510SN/Aint 4520SN/Abprintf(struct buf_pr *b, char *format, ...) 4530SN/A{ 4540SN/A va_list args; 4550SN/A int i; 4560SN/A 4570SN/A va_start(args, format); 4580SN/A 4590SN/A i = vsnprintf(b->ptr, b->avail, format, args); 4600SN/A va_end(args); 4610SN/A 4620SN/A if (i > b->avail || i < 0) { 4630SN/A /* Overflow or print error */ 4640SN/A b->avail = 0; 4650SN/A } else { 4660SN/A b->ptr += i; 4670SN/A b->avail -= i; 4680SN/A } 4690SN/A 4700SN/A b->needed += i; 4710SN/A 4720SN/A return (i); 4730SN/A} 4740SN/A 4750SN/A/* 4760SN/A * Special values printer for tablearg-aware opcodes. 4770SN/A */ 4780SN/Avoid 4790SN/Abprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 4800SN/A{ 4810SN/A 4820SN/A if (str != NULL) 4830SN/A bprintf(bp, "%s", str); 4840SN/A if (arg == IP_FW_TARG) 4850SN/A bprintf(bp, "tablearg"); 4860SN/A else 4870SN/A bprintf(bp, "%u", arg); 4880SN/A} 4890SN/A 4900SN/A/* 4910SN/A * Helper routine to print a possibly unaligned uint64_t on 4920SN/A * various platform. If width > 0, print the value with 4930SN/A * the desired width, followed by a space; 4940SN/A * otherwise, return the required width. 4950SN/A */ 4960SN/Aint 4970SN/Apr_u64(struct buf_pr *b, uint64_t *pd, int width) 4980SN/A{ 4990SN/A#ifdef TCC 5000SN/A#define U64_FMT "I64" 5010SN/A#else 5020SN/A#define U64_FMT "llu" 5030SN/A#endif 5040SN/A uint64_t u; 5050SN/A unsigned long long d; 5060SN/A 5070SN/A bcopy (pd, &u, sizeof(u)); 5080SN/A d = u; 5090SN/A return (width > 0) ? 5100SN/A bprintf(b, "%*" U64_FMT " ", width, d) : 5110SN/A snprintf(NULL, 0, "%" U64_FMT, d) ; 5120SN/A#undef U64_FMT 5130SN/A} 5140SN/A 5150SN/A 5160SN/Avoid * 5170SN/Asafe_calloc(size_t number, size_t size) 5180SN/A{ 5190SN/A void *ret = calloc(number, size); 5200SN/A 5210SN/A if (ret == NULL) 5220SN/A err(EX_OSERR, "calloc"); 5230SN/A return ret; 5240SN/A} 5250SN/A 5260SN/Avoid * 5270SN/Asafe_realloc(void *ptr, size_t size) 5280SN/A{ 5290SN/A void *ret = realloc(ptr, size); 5300SN/A 5310SN/A if (ret == NULL) 5320SN/A err(EX_OSERR, "realloc"); 5330SN/A return ret; 5340SN/A} 5350SN/A 5360SN/A/* 5370SN/A * Compare things like interface or table names. 5380SN/A */ 5390SN/Aint 5400SN/Astringnum_cmp(const char *a, const char *b) 5410SN/A{ 5420SN/A int la, lb; 5430SN/A 5440SN/A la = strlen(a); 5450SN/A lb = strlen(b); 5460SN/A 5470SN/A if (la > lb) 5480SN/A return (1); 5490SN/A else if (la < lb) 5500SN/A return (-01); 5510SN/A 5520SN/A return (strcmp(a, b)); 5530SN/A} 5540SN/A 555 556/* 557 * conditionally runs the command. 558 * Selected options or negative -> getsockopt 559 */ 560int 561do_cmd(int optname, void *optval, uintptr_t optlen) 562{ 563 int i; 564 565 if (co.test_only) 566 return 0; 567 568 if (ipfw_socket == -1) 569 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 570 if (ipfw_socket < 0) 571 err(EX_UNAVAILABLE, "socket"); 572 573 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 574 optname == IP_FW_ADD || optname == IP_FW3 || 575 optname == IP_FW_NAT_GET_CONFIG || 576 optname < 0 || 577 optname == IP_FW_NAT_GET_LOG) { 578 if (optname < 0) 579 optname = -optname; 580 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 581 (socklen_t *)optlen); 582 } else { 583 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 584 } 585 return i; 586} 587 588/* 589 * do_set3 - pass ipfw control cmd to kernel 590 * @optname: option name 591 * @optval: pointer to option data 592 * @optlen: option length 593 * 594 * Assumes op3 header is already embedded. 595 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 596 * Returns 0 on success or errno otherwise. 597 */ 598int 599do_set3(int optname, ip_fw3_opheader *op3, size_t optlen) 600{ 601 602 if (co.test_only) 603 return (0); 604 605 if (ipfw_socket == -1) 606 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 607 if (ipfw_socket < 0) 608 err(EX_UNAVAILABLE, "socket"); 609 610 op3->opcode = optname; 611 612 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 613} 614 615/* 616 * do_get3 - pass ipfw control cmd to kernel 617 * @optname: option name 618 * @optval: pointer to option data 619 * @optlen: pointer to option length 620 * 621 * Assumes op3 header is already embedded. 622 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 623 * Returns 0 on success or errno otherwise. 624 */ 625int 626do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 627{ 628 int error; 629 socklen_t len; 630 631 if (co.test_only) 632 return (0); 633 634 if (ipfw_socket == -1) 635 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 636 if (ipfw_socket < 0) 637 err(EX_UNAVAILABLE, "socket"); 638 639 op3->opcode = optname; 640 641 len = *optlen; 642 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len); 643 *optlen = len; 644 645 return (error); 646} 647 648/** 649 * match_token takes a table and a string, returns the value associated 650 * with the string (-1 in case of failure). 651 */ 652int 653match_token(struct _s_x *table, const char *string) 654{ 655 struct _s_x *pt; 656 uint i = strlen(string); 657 658 for (pt = table ; i && pt->s != NULL ; pt++) 659 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 660 return pt->x; 661 return (-1); 662} 663 664/** 665 * match_token_relaxed takes a table and a string, returns the value associated 666 * with the string for the best match. 667 * 668 * Returns: 669 * value from @table for matched records 670 * -1 for non-matched records 671 * -2 if more than one records match @string. 672 */ 673int 674match_token_relaxed(struct _s_x *table, const char *string) 675{ 676 struct _s_x *pt, *m; 677 int i, c; 678 679 i = strlen(string); 680 c = 0; 681 682 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 683 if (strncmp(pt->s, string, i) != 0) 684 continue; 685 m = pt; 686 c++; 687 } 688 689 if (c == 1) 690 return (m->x); 691 692 return (c > 0 ? -2: -1); 693} 694 695int 696get_token(struct _s_x *table, const char *string, const char *errbase) 697{ 698 int tcmd; 699 700 if ((tcmd = match_token_relaxed(table, string)) < 0) 701 errx(EX_USAGE, "%s %s %s", 702 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 703 704 return (tcmd); 705} 706 707/** 708 * match_value takes a table and a value, returns the string associated 709 * with the value (NULL in case of failure). 710 */ 711char const * 712match_value(struct _s_x *p, int value) 713{ 714 for (; p->s != NULL; p++) 715 if (p->x == value) 716 return p->s; 717 return NULL; 718} 719 720size_t 721concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 722{ 723 struct _s_x *pt; 724 int l; 725 size_t sz; 726 727 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 728 l = snprintf(buf + sz, bufsize - sz, "%s%s", 729 (sz == 0) ? "" : delimiter, pt->s); 730 sz += l; 731 bufsize += l; 732 if (sz > bufsize) 733 return (bufsize); 734 } 735 736 return (sz); 737} 738 739/* 740 * helper function to process a set of flags and set bits in the 741 * appropriate masks. 742 */ 743int 744fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 745 uint32_t *clear) 746{ 747 char *q; /* points to the separator */ 748 int val; 749 uint32_t *which; /* mask we are working on */ 750 751 while (p && *p) { 752 if (*p == '!') { 753 p++; 754 which = clear; 755 } else 756 which = set; 757 q = strchr(p, ','); 758 if (q) 759 *q++ = '\0'; 760 val = match_token(flags, p); 761 if (val <= 0) { 762 if (e != NULL) 763 *e = p; 764 return (-1); 765 } 766 *which |= (uint32_t)val; 767 p = q; 768 } 769 return (0); 770} 771 772void 773print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 774{ 775 char const *comma = ""; 776 int i, l; 777 778 for (i = 0; list[i].x != 0; i++) { 779 if ((set & list[i].x) == 0) 780 continue; 781 782 set &= ~list[i].x; 783 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 784 if (l >= sz) 785 return; 786 comma = ","; 787 buf += l; 788 sz -=l; 789 } 790} 791 792/* 793 * _substrcmp takes two strings and returns 1 if they do not match, 794 * and 0 if they match exactly or the first string is a sub-string 795 * of the second. A warning is printed to stderr in the case that the 796 * first string is a sub-string of the second. 797 * 798 * This function will be removed in the future through the usual 799 * deprecation process. 800 */ 801int 802_substrcmp(const char *str1, const char* str2) 803{ 804 805 if (strncmp(str1, str2, strlen(str1)) != 0) 806 return 1; 807 808 if (strlen(str1) != strlen(str2)) 809 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 810 str1, str2); 811 return 0; 812} 813 814/* 815 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 816 * and 0 if they match exactly or the second string is a sub-string 817 * of the first. A warning is printed to stderr in the case that the 818 * first string does not match the third. 819 * 820 * This function exists to warn about the bizarre construction 821 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 822 * for "bytes". The problem is that in addition to accepting "by", 823 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 824 * other string beginning with "by". 825 * 826 * This function will be removed in the future through the usual 827 * deprecation process. 828 */ 829int 830_substrcmp2(const char *str1, const char* str2, const char* str3) 831{ 832 833 if (strncmp(str1, str2, strlen(str2)) != 0) 834 return 1; 835 836 if (strcmp(str1, str3) != 0) 837 warnx("DEPRECATED: '%s' matched '%s'", 838 str1, str3); 839 return 0; 840} 841 842/* 843 * prints one port, symbolic or numeric 844 */ 845static void 846print_port(struct buf_pr *bp, int proto, uint16_t port) 847{ 848 849 if (proto == IPPROTO_ETHERTYPE) { 850 char const *s; 851 852 if (co.do_resolv && (s = match_value(ether_types, port)) ) 853 bprintf(bp, "%s", s); 854 else 855 bprintf(bp, "0x%04x", port); 856 } else { 857 struct servent *se = NULL; 858 if (co.do_resolv) { 859 struct protoent *pe = getprotobynumber(proto); 860 861 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 862 } 863 if (se) 864 bprintf(bp, "%s", se->s_name); 865 else 866 bprintf(bp, "%d", port); 867 } 868} 869 870static struct _s_x _port_name[] = { 871 {"dst-port", O_IP_DSTPORT}, 872 {"src-port", O_IP_SRCPORT}, 873 {"ipid", O_IPID}, 874 {"iplen", O_IPLEN}, 875 {"ipttl", O_IPTTL}, 876 {"mac-type", O_MAC_TYPE}, 877 {"tcpdatalen", O_TCPDATALEN}, 878 {"tcpwin", O_TCPWIN}, 879 {"tagged", O_TAGGED}, 880 {NULL, 0} 881}; 882 883/* 884 * Print the values in a list 16-bit items of the types above. 885 * XXX todo: add support for mask. 886 */ 887static void 888print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 889{ 890 uint16_t *p = cmd->ports; 891 int i; 892 char const *sep; 893 894 if (opcode != 0) { 895 sep = match_value(_port_name, opcode); 896 if (sep == NULL) 897 sep = "???"; 898 bprintf(bp, " %s", sep); 899 } 900 sep = " "; 901 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 902 bprintf(bp, "%s", sep); 903 print_port(bp, proto, p[0]); 904 if (p[0] != p[1]) { 905 bprintf(bp, "-"); 906 print_port(bp, proto, p[1]); 907 } 908 sep = ","; 909 } 910} 911 912/* 913 * Like strtol, but also translates service names into port numbers 914 * for some protocols. 915 * In particular: 916 * proto == -1 disables the protocol check; 917 * proto == IPPROTO_ETHERTYPE looks up an internal table 918 * proto == <some value in /etc/protocols> matches the values there. 919 * Returns *end == s in case the parameter is not found. 920 */ 921static int 922strtoport(char *s, char **end, int base, int proto) 923{ 924 char *p, *buf; 925 char *s1; 926 int i; 927 928 *end = s; /* default - not found */ 929 if (*s == '\0') 930 return 0; /* not found */ 931 932 if (isdigit(*s)) 933 return strtol(s, end, base); 934 935 /* 936 * find separator. '\\' escapes the next char. 937 */ 938 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 939 if (*s1 == '\\' && s1[1] != '\0') 940 s1++; 941 942 buf = safe_calloc(s1 - s + 1, 1); 943 944 /* 945 * copy into a buffer skipping backslashes 946 */ 947 for (p = s, i = 0; p != s1 ; p++) 948 if (*p != '\\') 949 buf[i++] = *p; 950 buf[i++] = '\0'; 951 952 if (proto == IPPROTO_ETHERTYPE) { 953 i = match_token(ether_types, buf); 954 free(buf); 955 if (i != -1) { /* found */ 956 *end = s1; 957 return i; 958 } 959 } else { 960 struct protoent *pe = NULL; 961 struct servent *se; 962 963 if (proto != 0) 964 pe = getprotobynumber(proto); 965 setservent(1); 966 se = getservbyname(buf, pe ? pe->p_name : NULL); 967 free(buf); 968 if (se != NULL) { 969 *end = s1; 970 return ntohs(se->s_port); 971 } 972 } 973 return 0; /* not found */ 974} 975 976/* 977 * Fill the body of the command with the list of port ranges. 978 */ 979static int 980fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 981{ 982 uint16_t a, b, *p = cmd->ports; 983 int i = 0; 984 char *s = av; 985 986 while (*s) { 987 a = strtoport(av, &s, 0, proto); 988 if (s == av) /* empty or invalid argument */ 989 return (0); 990 991 CHECK_LENGTH(cblen, i + 2); 992 993 switch (*s) { 994 case '-': /* a range */ 995 av = s + 1; 996 b = strtoport(av, &s, 0, proto); 997 /* Reject expressions like '1-abc' or '1-2-3'. */ 998 if (s == av || (*s != ',' && *s != '\0')) 999 return (0); 1000 p[0] = a; 1001 p[1] = b; 1002 break; 1003 case ',': /* comma separated list */ 1004 case '\0': 1005 p[0] = p[1] = a; 1006 break; 1007 default: 1008 warnx("port list: invalid separator <%c> in <%s>", 1009 *s, av); 1010 return (0); 1011 } 1012 1013 i++; 1014 p += 2; 1015 av = s + 1; 1016 } 1017 if (i > 0) { 1018 if (i + 1 > F_LEN_MASK) 1019 errx(EX_DATAERR, "too many ports/ranges\n"); 1020 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1021 } 1022 return (i); 1023} 1024 1025/* 1026 * Fill the body of the command with the list of DiffServ codepoints. 1027 */ 1028static void 1029fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1030{ 1031 uint32_t *low, *high; 1032 char *s = av, *a; 1033 int code; 1034 1035 cmd->opcode = O_DSCP; 1036 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1037 1038 CHECK_CMDLEN; 1039 1040 low = (uint32_t *)(cmd + 1); 1041 high = low + 1; 1042 1043 *low = 0; 1044 *high = 0; 1045 1046 while (s != NULL) { 1047 a = strchr(s, ','); 1048 1049 if (a != NULL) 1050 *a++ = '\0'; 1051 1052 if (isalpha(*s)) { 1053 if ((code = match_token(f_ipdscp, s)) == -1) 1054 errx(EX_DATAERR, "Unknown DSCP code"); 1055 } else { 1056 code = strtoul(s, NULL, 10); 1057 if (code < 0 || code > 63) 1058 errx(EX_DATAERR, "Invalid DSCP value"); 1059 } 1060 1061 if (code >= 32) 1062 *high |= 1 << (code - 32); 1063 else 1064 *low |= 1 << code; 1065 1066 s = a; 1067 } 1068} 1069 1070static struct _s_x icmpcodes[] = { 1071 { "net", ICMP_UNREACH_NET }, 1072 { "host", ICMP_UNREACH_HOST }, 1073 { "protocol", ICMP_UNREACH_PROTOCOL }, 1074 { "port", ICMP_UNREACH_PORT }, 1075 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1076 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1077 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1078 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1079 { "isolated", ICMP_UNREACH_ISOLATED }, 1080 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1081 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1082 { "tosnet", ICMP_UNREACH_TOSNET }, 1083 { "toshost", ICMP_UNREACH_TOSHOST }, 1084 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1085 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1086 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1087 { NULL, 0 } 1088}; 1089 1090static void 1091fill_reject_code(u_short *codep, char *str) 1092{ 1093 int val; 1094 char *s; 1095 1096 val = strtoul(str, &s, 0); 1097 if (s == str || *s != '\0' || val >= 0x100) 1098 val = match_token(icmpcodes, str); 1099 if (val < 0) 1100 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1101 *codep = val; 1102 return; 1103} 1104 1105static void 1106print_reject_code(struct buf_pr *bp, uint16_t code) 1107{ 1108 char const *s; 1109 1110 if ((s = match_value(icmpcodes, code)) != NULL) 1111 bprintf(bp, "unreach %s", s); 1112 else 1113 bprintf(bp, "unreach %u", code); 1114} 1115 1116/* 1117 * Returns the number of bits set (from left) in a contiguous bitmask, 1118 * or -1 if the mask is not contiguous. 1119 * XXX this needs a proper fix. 1120 * This effectively works on masks in big-endian (network) format. 1121 * when compiled on little endian architectures. 1122 * 1123 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1124 * the first bit on the wire is bit 0 of the first byte. 1125 * len is the max length in bits. 1126 */ 1127int 1128contigmask(uint8_t *p, int len) 1129{ 1130 int i, n; 1131 1132 for (i=0; i<len ; i++) 1133 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1134 break; 1135 for (n=i+1; n < len; n++) 1136 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1137 return -1; /* mask not contiguous */ 1138 return i; 1139} 1140 1141/* 1142 * print flags set/clear in the two bitmasks passed as parameters. 1143 * There is a specialized check for f_tcpflags. 1144 */ 1145static void 1146print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1147 struct _s_x *list) 1148{ 1149 char const *comma = ""; 1150 int i; 1151 uint8_t set = cmd->arg1 & 0xff; 1152 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1153 1154 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1155 bprintf(bp, " setup"); 1156 return; 1157 } 1158 1159 bprintf(bp, " %s ", name); 1160 for (i=0; list[i].x != 0; i++) { 1161 if (set & list[i].x) { 1162 set &= ~list[i].x; 1163 bprintf(bp, "%s%s", comma, list[i].s); 1164 comma = ","; 1165 } 1166 if (clear & list[i].x) { 1167 clear &= ~list[i].x; 1168 bprintf(bp, "%s!%s", comma, list[i].s); 1169 comma = ","; 1170 } 1171 } 1172} 1173 1174 1175/* 1176 * Print the ip address contained in a command. 1177 */ 1178static void 1179print_ip(struct buf_pr *bp, const struct format_opts *fo, ipfw_insn_ip *cmd, 1180 char const *s) 1181{ 1182 struct hostent *he = NULL; 1183 struct in_addr *ia; 1184 uint32_t len = F_LEN((ipfw_insn *)cmd); 1185 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1186 char *t; 1187 1188 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1189 uint32_t d = a[1]; 1190 const char *arg = "<invalid>"; 1191 1192 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1193 arg = match_value(rule_options, lookup_key[d]); 1194 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1195 bprintf(bp, " lookup %s %s", arg, t); 1196 return; 1197 } 1198 bprintf(bp, "%s ", s); 1199 1200 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1201 bprintf(bp, "me"); 1202 return; 1203 } 1204 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1205 cmd->o.opcode == O_IP_DST_LOOKUP) { 1206 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1207 bprintf(bp, "table(%s", t); 1208 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1209 bprintf(bp, ",%u", *a); 1210 bprintf(bp, ")"); 1211 return; 1212 } 1213 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1214 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1215 int i, j; 1216 char comma = '{'; 1217 1218 x = cmd->o.arg1 - 1; 1219 x = htonl( ~x ); 1220 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1221 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1222 contigmask((uint8_t *)&x, 32)); 1223 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1224 x &= 0xff; /* base */ 1225 /* 1226 * Print bits and ranges. 1227 * Locate first bit set (i), then locate first bit unset (j). 1228 * If we have 3+ consecutive bits set, then print them as a 1229 * range, otherwise only print the initial bit and rescan. 1230 */ 1231 for (i=0; i < cmd->o.arg1; i++) 1232 if (map[i/32] & (1<<(i & 31))) { 1233 for (j=i+1; j < cmd->o.arg1; j++) 1234 if (!(map[ j/32] & (1<<(j & 31)))) 1235 break; 1236 bprintf(bp, "%c%d", comma, i+x); 1237 if (j>i+2) { /* range has at least 3 elements */ 1238 bprintf(bp, "-%d", j-1+x); 1239 i = j-1; 1240 } 1241 comma = ','; 1242 } 1243 bprintf(bp, "}"); 1244 return; 1245 } 1246 /* 1247 * len == 2 indicates a single IP, whereas lists of 1 or more 1248 * addr/mask pairs have len = (2n+1). We convert len to n so we 1249 * use that to count the number of entries. 1250 */ 1251 for (len = len / 2; len > 0; len--, a += 2) { 1252 int mb = /* mask length */ 1253 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1254 32 : contigmask((uint8_t *)&(a[1]), 32); 1255 if (mb == 32 && co.do_resolv) 1256 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1257 if (he != NULL) /* resolved to name */ 1258 bprintf(bp, "%s", he->h_name); 1259 else if (mb == 0) /* any */ 1260 bprintf(bp, "any"); 1261 else { /* numeric IP followed by some kind of mask */ 1262 ia = (struct in_addr *)&a[0]; 1263 bprintf(bp, "%s", inet_ntoa(*ia)); 1264 if (mb < 0) { 1265 ia = (struct in_addr *)&a[1]; 1266 bprintf(bp, ":%s", inet_ntoa(*ia)); 1267 } else if (mb < 32) 1268 bprintf(bp, "/%d", mb); 1269 } 1270 if (len > 1) 1271 bprintf(bp, ","); 1272 } 1273} 1274 1275/* 1276 * prints a MAC address/mask pair 1277 */ 1278static void 1279format_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1280{ 1281 int l = contigmask(mask, 48); 1282 1283 if (l == 0) 1284 bprintf(bp, " any"); 1285 else { 1286 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1287 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1288 if (l == -1) 1289 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1290 mask[0], mask[1], mask[2], 1291 mask[3], mask[4], mask[5]); 1292 else if (l < 48) 1293 bprintf(bp, "/%d", l); 1294 } 1295} 1296 1297static void 1298print_mac(struct buf_pr *bp, ipfw_insn_mac *mac) 1299{ 1300 1301 bprintf(bp, " MAC"); 1302 format_mac(bp, mac->addr, mac->mask); 1303 format_mac(bp, mac->addr + 6, mac->mask + 6); 1304} 1305 1306static void 1307fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1308{ 1309 uint8_t type; 1310 1311 cmd->d[0] = 0; 1312 while (*av) { 1313 if (*av == ',') 1314 av++; 1315 1316 type = strtoul(av, &av, 0); 1317 1318 if (*av != ',' && *av != '\0') 1319 errx(EX_DATAERR, "invalid ICMP type"); 1320 1321 if (type > 31) 1322 errx(EX_DATAERR, "ICMP type out of range"); 1323 1324 cmd->d[0] |= 1 << type; 1325 } 1326 cmd->o.opcode = O_ICMPTYPE; 1327 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1328} 1329 1330static void 1331print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1332{ 1333 int i; 1334 char sep= ' '; 1335 1336 bprintf(bp, " icmptypes"); 1337 for (i = 0; i < 32; i++) { 1338 if ( (cmd->d[0] & (1 << (i))) == 0) 1339 continue; 1340 bprintf(bp, "%c%d", sep, i); 1341 sep = ','; 1342 } 1343} 1344 1345static void 1346print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1347{ 1348 int i = 0; 1349 uint32_t *v; 1350 char sep= ' '; 1351 const char *code; 1352 1353 bprintf(bp, " dscp"); 1354 v = cmd->d; 1355 while (i < 64) { 1356 if (*v & (1 << i)) { 1357 if ((code = match_value(f_ipdscp, i)) != NULL) 1358 bprintf(bp, "%c%s", sep, code); 1359 else 1360 bprintf(bp, "%c%d", sep, i); 1361 sep = ','; 1362 } 1363 1364 if ((++i % 32) == 0) 1365 v++; 1366 } 1367} 1368 1369#define insntod(cmd, type) ((ipfw_insn_ ## type *)(cmd)) 1370struct show_state { 1371 struct ip_fw_rule *rule; 1372 const ipfw_insn *eaction; 1373 uint8_t *printed; 1374 int flags; 1375#define HAVE_PROTO 0x0001 1376#define HAVE_SRCIP 0x0002 1377#define HAVE_DSTIP 0x0004 1378 int proto; 1379 int or_block; 1380}; 1381 1382static int 1383init_show_state(struct show_state *state, struct ip_fw_rule *rule) 1384{ 1385 1386 state->printed = calloc(rule->cmd_len, sizeof(uint8_t)); 1387 if (state->printed == NULL) 1388 return (ENOMEM); 1389 state->rule = rule; 1390 state->eaction = NULL; 1391 state->flags = 0; 1392 state->proto = 0; 1393 state->or_block = 0; 1394 return (0); 1395} 1396 1397static void 1398free_show_state(struct show_state *state) 1399{ 1400 1401 free(state->printed); 1402} 1403 1404static uint8_t 1405is_printed_opcode(struct show_state *state, const ipfw_insn *cmd) 1406{ 1407 1408 return (state->printed[cmd - state->rule->cmd]); 1409} 1410 1411static void 1412mark_printed(struct show_state *state, const ipfw_insn *cmd) 1413{ 1414 1415 state->printed[cmd - state->rule->cmd] = 1; 1416} 1417 1418static void 1419print_limit(struct buf_pr *bp, const ipfw_insn_limit *limit) 1420{ 1421 struct _s_x *p = limit_masks; 1422 char const *comma = " "; 1423 uint8_t x; 1424 1425 bprintf(bp, " limit"); 1426 for (x = limit->limit_mask; p->x != 0; p++) { 1427 if ((x & p->x) == p->x) { 1428 x &= ~p->x; 1429 bprintf(bp, "%s%s", comma, p->s); 1430 comma = ","; 1431 } 1432 } 1433 bprint_uint_arg(bp, " ", limit->conn_limit); 1434} 1435 1436static int 1437print_instruction(struct buf_pr *bp, const struct format_opts *fo, 1438 struct show_state *state, ipfw_insn *cmd) 1439{ 1440 struct protoent *pe; 1441 struct passwd *pwd; 1442 struct group *grp; 1443 const char *s; 1444 double d; 1445 1446 if (is_printed_opcode(state, cmd)) 1447 return (0); 1448 if ((cmd->len & F_OR) != 0 && state->or_block == 0) 1449 bprintf(bp, " {"); 1450 if (cmd->opcode != O_IN && (cmd->len & F_NOT) != 0) 1451 bprintf(bp, " not"); 1452 1453 switch (cmd->opcode) { 1454 case O_PROB: 1455 d = 1.0 * insntod(cmd, u32)->d[0] / 0x7fffffff; 1456 bprintf(bp, "prob %f ", d); 1457 break; 1458 case O_PROBE_STATE: /* no need to print anything here */ 1459 break; 1460 case O_IP_SRC: 1461 case O_IP_SRC_LOOKUP: 1462 case O_IP_SRC_MASK: 1463 case O_IP_SRC_ME: 1464 case O_IP_SRC_SET: 1465 case O_IP_DST: 1466 case O_IP_DST_LOOKUP: 1467 case O_IP_DST_MASK: 1468 case O_IP_DST_ME: 1469 case O_IP_DST_SET: 1470 print_ip(bp, fo, insntod(cmd, ip), ""); 1471 break; 1472 case O_IP6_SRC: 1473 case O_IP6_SRC_MASK: 1474 case O_IP6_SRC_ME: 1475 case O_IP6_DST: 1476 case O_IP6_DST_MASK: 1477 case O_IP6_DST_ME: 1478 print_ip6(bp, insntod(cmd, ip6), ""); 1479 break; 1480 case O_FLOW6ID: 1481 print_flow6id(bp, insntod(cmd, u32)); 1482 break; 1483 case O_IP_DSTPORT: 1484 case O_IP_SRCPORT: 1485 print_newports(bp, insntod(cmd, u16), state->proto, 1486 (state->flags & (HAVE_SRCIP | HAVE_DSTIP)) == 1487 (HAVE_SRCIP | HAVE_DSTIP) ? cmd->opcode: 0); 1488 break; 1489 case O_PROTO: 1490 pe = getprotobynumber(cmd->arg1); 1491 if (state->flags & HAVE_PROTO) 1492 bprintf(bp, " proto"); 1493 if (pe != NULL) 1494 bprintf(bp, " %s", pe->p_name); 1495 else 1496 bprintf(bp, " %u", cmd->arg1); 1497 break; 1498 case O_MACADDR2: 1499 print_mac(bp, insntod(cmd, mac)); 1500 break; 1501 case O_MAC_TYPE: 1502 print_newports(bp, insntod(cmd, u16), 1503 IPPROTO_ETHERTYPE, cmd->opcode); 1504 break; 1505 case O_FRAG: 1506 bprintf(bp, " frag"); 1507 break; 1508 case O_FIB: 1509 bprintf(bp, " fib %u", cmd->arg1); 1510 break; 1511 case O_SOCKARG: 1512 bprintf(bp, " sockarg"); 1513 break; 1514 case O_IN: 1515 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1516 break; 1517 case O_DIVERTED: 1518 switch (cmd->arg1) { 1519 case 3: 1520 bprintf(bp, " diverted"); 1521 break; 1522 case 2: 1523 bprintf(bp, " diverted-output"); 1524 break; 1525 case 1: 1526 bprintf(bp, " diverted-loopback"); 1527 break; 1528 default: 1529 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1530 break; 1531 } 1532 break; 1533 case O_LAYER2: 1534 bprintf(bp, " layer2"); 1535 break; 1536 case O_XMIT: 1537 case O_RECV: 1538 case O_VIA: 1539 if (cmd->opcode == O_XMIT) 1540 s = "xmit"; 1541 else if (cmd->opcode == O_RECV) 1542 s = "recv"; 1543 else /* if (cmd->opcode == O_VIA) */ 1544 s = "via"; 1545 switch (insntod(cmd, if)->name[0]) { 1546 case '\0': 1547 bprintf(bp, " %s %s", s, 1548 inet_ntoa(insntod(cmd, if)->p.ip)); 1549 break; 1550 case '\1': 1551 bprintf(bp, " %s table(%s)", s, 1552 table_search_ctlv(fo->tstate, 1553 insntod(cmd, if)->p.kidx)); 1554 break; 1555 default: 1556 bprintf(bp, " %s %s", s, 1557 insntod(cmd, if)->name); 1558 } 1559 break; 1560 case O_IP_FLOW_LOOKUP: 1561 s = table_search_ctlv(fo->tstate, cmd->arg1); 1562 bprintf(bp, " flow table(%s", s); 1563 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1564 bprintf(bp, ",%u", insntod(cmd, u32)->d[0]); 1565 bprintf(bp, ")"); 1566 break; 1567 case O_IPID: 1568 case O_IPTTL: 1569 case O_IPLEN: 1570 case O_TCPDATALEN: 1571 case O_TCPWIN: 1572 if (F_LEN(cmd) == 1) { 1573 switch (cmd->opcode) { 1574 case O_IPID: 1575 s = "ipid"; 1576 break; 1577 case O_IPTTL: 1578 s = "ipttl"; 1579 break; 1580 case O_IPLEN: 1581 s = "iplen"; 1582 break; 1583 case O_TCPDATALEN: 1584 s = "tcpdatalen"; 1585 break; 1586 case O_TCPWIN: 1587 s = "tcpwin"; 1588 break; 1589 } 1590 bprintf(bp, " %s %u", s, cmd->arg1); 1591 } else 1592 print_newports(bp, insntod(cmd, u16), 0, 1593 cmd->opcode); 1594 break; 1595 case O_IPVER: 1596 bprintf(bp, " ipver %u", cmd->arg1); 1597 break; 1598 case O_IPPRECEDENCE: 1599 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1600 break; 1601 case O_DSCP: 1602 print_dscp(bp, insntod(cmd, u32)); 1603 break; 1604 case O_IPOPT: 1605 print_flags(bp, "ipoptions", cmd, f_ipopts); 1606 break; 1607 case O_IPTOS: 1608 print_flags(bp, "iptos", cmd, f_iptos); 1609 break; 1610 case O_ICMPTYPE: 1611 print_icmptypes(bp, insntod(cmd, u32)); 1612 break; 1613 case O_ESTAB: 1614 bprintf(bp, " established"); 1615 break; 1616 case O_TCPFLAGS: 1617 print_flags(bp, "tcpflags", cmd, f_tcpflags); 1618 break; 1619 case O_TCPOPTS: 1620 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 1621 break; 1622 case O_TCPACK: 1623 bprintf(bp, " tcpack %d", 1624 ntohl(insntod(cmd, u32)->d[0])); 1625 break; 1626 case O_TCPSEQ: 1627 bprintf(bp, " tcpseq %d", 1628 ntohl(insntod(cmd, u32)->d[0])); 1629 break; 1630 case O_UID: 1631 pwd = getpwuid(insntod(cmd, u32)->d[0]); 1632 if (pwd != NULL) 1633 bprintf(bp, " uid %s", pwd->pw_name); 1634 else 1635 bprintf(bp, " uid %u", 1636 insntod(cmd, u32)->d[0]); 1637 break; 1638 case O_GID: 1639 grp = getgrgid(insntod(cmd, u32)->d[0]); 1640 if (grp != NULL) 1641 bprintf(bp, " gid %s", grp->gr_name); 1642 else 1643 bprintf(bp, " gid %u", 1644 insntod(cmd, u32)->d[0]); 1645 break; 1646 case O_JAIL: 1647 bprintf(bp, " jail %d", insntod(cmd, u32)->d[0]); 1648 break; 1649 case O_VERREVPATH: 1650 bprintf(bp, " verrevpath"); 1651 break; 1652 case O_VERSRCREACH: 1653 bprintf(bp, " versrcreach"); 1654 break; 1655 case O_ANTISPOOF: 1656 bprintf(bp, " antispoof"); 1657 break; 1658 case O_IPSEC: 1659 bprintf(bp, " ipsec"); 1660 break; 1661 case O_NOP: 1662 bprintf(bp, " // %s", (char *)(cmd + 1)); 1663 break; 1664 case O_KEEP_STATE: 1665 bprintf(bp, " keep-state"); 1666 bprintf(bp, " :%s", 1667 object_search_ctlv(fo->tstate, cmd->arg1, 1668 IPFW_TLV_STATE_NAME)); 1669 break; 1670 case O_LIMIT: 1671 print_limit(bp, insntod(cmd, limit)); 1672 bprintf(bp, " :%s", 1673 object_search_ctlv(fo->tstate, cmd->arg1, 1674 IPFW_TLV_STATE_NAME)); 1675 break; 1676 case O_IP6: 1677 bprintf(bp, " ip6"); 1678 break; 1679 case O_IP4: 1680 bprintf(bp, " ip4"); 1681 break; 1682 case O_ICMP6TYPE: 1683 print_icmp6types(bp, insntod(cmd, u32)); 1684 break; 1685 case O_EXT_HDR: 1686 print_ext6hdr(bp, cmd); 1687 break; 1688 case O_TAGGED: 1689 if (F_LEN(cmd) == 1) 1690 bprint_uint_arg(bp, " tagged ", cmd->arg1); 1691 else 1692 print_newports(bp, insntod(cmd, u16), 1693 0, O_TAGGED); 1694 break; 1695 default: 1696 bprintf(bp, " [opcode %d len %d]", cmd->opcode, 1697 cmd->len); 1698 } 1699 if (cmd->len & F_OR) { 1700 bprintf(bp, " or"); 1701 state->or_block = 1; 1702 } else if (state->or_block != 0) { 1703 bprintf(bp, " }"); 1704 state->or_block = 0; 1705 } 1706 mark_printed(state, cmd); 1707 1708 return (1); 1709} 1710 1711static ipfw_insn * 1712print_opcode(struct buf_pr *bp, struct format_opts *fo, 1713 struct show_state *state, uint8_t opcode) 1714{ 1715 ipfw_insn *cmd; 1716 int l; 1717 1718 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1719 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1720 /* We use zero opcode to print the rest of options */ 1721 if (opcode != 0 && cmd->opcode != opcode) 1722 continue; 1723 /* 1724 * Skip O_NOP, when we printing the rest 1725 * of options, it will be handled separately. 1726 */ 1727 if (cmd->opcode == O_NOP && opcode != O_NOP) 1728 continue; 1729 if (!print_instruction(bp, fo, state, cmd)) 1730 continue; 1731 return (cmd); 1732 } 1733 return (NULL); 1734} 1735 1736static void 1737print_fwd(struct buf_pr *bp, const ipfw_insn *cmd) 1738{ 1739 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1740 ipfw_insn_sa6 *sa6; 1741 ipfw_insn_sa *sa; 1742 uint16_t port; 1743 1744 if (cmd->opcode == O_FORWARD_IP) { 1745 sa = insntod(cmd, sa); 1746 port = sa->sa.sin_port; 1747 if (sa->sa.sin_addr.s_addr == INADDR_ANY) 1748 bprintf(bp, "fwd tablearg"); 1749 else 1750 bprintf(bp, "fwd %s", inet_ntoa(sa->sa.sin_addr)); 1751 } else { 1752 sa6 = insntod(cmd, sa6); 1753 port = sa6->sa.sin6_port; 1754 bprintf(bp, "fwd "); 1755 if (getnameinfo((const struct sockaddr *)&sa6->sa, 1756 sizeof(struct sockaddr_in6), buf, sizeof(buf), NULL, 0, 1757 NI_NUMERICHOST) == 0) 1758 bprintf(bp, "%s", buf); 1759 } 1760 if (port != 0) 1761 bprintf(bp, ",%u", port); 1762} 1763 1764static int 1765print_action_instruction(struct buf_pr *bp, const struct format_opts *fo, 1766 struct show_state *state, const ipfw_insn *cmd) 1767{ 1768 const char *s; 1769 1770 if (is_printed_opcode(state, cmd)) 1771 return (0); 1772 switch (cmd->opcode) { 1773 case O_CHECK_STATE: 1774 bprintf(bp, "check-state"); 1775 if (cmd->arg1 != 0) 1776 s = object_search_ctlv(fo->tstate, cmd->arg1, 1777 IPFW_TLV_STATE_NAME); 1778 else 1779 s = NULL; 1780 bprintf(bp, " :%s", s ? s: "any"); 1781 break; 1782 case O_ACCEPT: 1783 bprintf(bp, "allow"); 1784 break; 1785 case O_COUNT: 1786 bprintf(bp, "count"); 1787 break; 1788 case O_DENY: 1789 bprintf(bp, "deny"); 1790 break; 1791 case O_REJECT: 1792 if (cmd->arg1 == ICMP_REJECT_RST) 1793 bprintf(bp, "reset"); 1794 else if (cmd->arg1 == ICMP_REJECT_ABORT) 1795 bprintf(bp, "abort"); 1796 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1797 bprintf(bp, "reject"); 1798 else 1799 print_reject_code(bp, cmd->arg1); 1800 break; 1801 case O_UNREACH6: 1802 if (cmd->arg1 == ICMP6_UNREACH_RST) 1803 bprintf(bp, "reset6"); 1804 else if (cmd->arg1 == ICMP6_UNREACH_ABORT) 1805 bprintf(bp, "abort6"); 1806 else 1807 print_unreach6_code(bp, cmd->arg1); 1808 break; 1809 case O_SKIPTO: 1810 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1811 break; 1812 case O_PIPE: 1813 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1814 break; 1815 case O_QUEUE: 1816 bprint_uint_arg(bp, "queue ", cmd->arg1); 1817 break; 1818 case O_DIVERT: 1819 bprint_uint_arg(bp, "divert ", cmd->arg1); 1820 break; 1821 case O_TEE: 1822 bprint_uint_arg(bp, "tee ", cmd->arg1); 1823 break; 1824 case O_NETGRAPH: 1825 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1826 break; 1827 case O_NGTEE: 1828 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1829 break; 1830 case O_FORWARD_IP: 1831 case O_FORWARD_IP6: 1832 print_fwd(bp, cmd); 1833 break; 1834 case O_LOG: 1835 if (insntod(cmd, log)->max_log > 0) 1836 bprintf(bp, " log logamount %d", 1837 insntod(cmd, log)->max_log); 1838 else 1839 bprintf(bp, " log"); 1840 break; 1841 case O_ALTQ: 1842#ifndef NO_ALTQ 1843 print_altq_cmd(bp, insntod(cmd, altq)); 1844#endif 1845 break; 1846 case O_TAG: 1847 bprint_uint_arg(bp, cmd->len & F_NOT ? " untag ": 1848 " tag ", cmd->arg1); 1849 break; 1850 case O_NAT: 1851 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1852 bprint_uint_arg(bp, "nat ", cmd->arg1); 1853 else 1854 bprintf(bp, "nat global"); 1855 break; 1856 case O_SETFIB: 1857 if (cmd->arg1 == IP_FW_TARG) 1858 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1859 else 1860 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1861 break; 1862 case O_EXTERNAL_ACTION: 1863 /* 1864 * The external action can consists of two following 1865 * each other opcodes - O_EXTERNAL_ACTION and 1866 * O_EXTERNAL_INSTANCE. The first contains the ID of 1867 * name of external action. The second contains the ID 1868 * of name of external action instance. 1869 * NOTE: in case when external action has no named 1870 * instances support, the second opcode isn't needed. 1871 */ 1872 state->eaction = cmd; 1873 s = object_search_ctlv(fo->tstate, cmd->arg1, 1874 IPFW_TLV_EACTION); 1875 if (match_token(rule_eactions, s) != -1) 1876 bprintf(bp, "%s", s); 1877 else 1878 bprintf(bp, "eaction %s", s); 1879 break; 1880 case O_EXTERNAL_INSTANCE: 1881 if (state->eaction == NULL) 1882 break; 1883 /* 1884 * XXX: we need to teach ipfw(9) to rewrite opcodes 1885 * in the user buffer on rule addition. When we add 1886 * the rule, we specify zero TLV type for 1887 * O_EXTERNAL_INSTANCE object. To show correct 1888 * rule after `ipfw add` we need to search instance 1889 * name with zero type. But when we do `ipfw show` 1890 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1891 * macro. 1892 */ 1893 s = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1894 if (s == NULL) 1895 s = object_search_ctlv(fo->tstate, 1896 cmd->arg1, IPFW_TLV_EACTION_NAME( 1897 state->eaction->arg1)); 1898 bprintf(bp, " %s", s); 1899 break; 1900 case O_EXTERNAL_DATA: 1901 if (state->eaction == NULL) 1902 break; 1903 /* 1904 * Currently we support data formatting only for 1905 * external data with datalen u16. For unknown data 1906 * print its size in bytes. 1907 */ 1908 if (cmd->len == F_INSN_SIZE(ipfw_insn)) 1909 bprintf(bp, " %u", cmd->arg1); 1910 else 1911 bprintf(bp, " %ubytes", 1912 cmd->len * sizeof(uint32_t)); 1913 break; 1914 case O_SETDSCP: 1915 if (cmd->arg1 == IP_FW_TARG) { 1916 bprintf(bp, "setdscp tablearg"); 1917 break; 1918 } 1919 s = match_value(f_ipdscp, cmd->arg1 & 0x3F); 1920 if (s != NULL) 1921 bprintf(bp, "setdscp %s", s); 1922 else 1923 bprintf(bp, "setdscp %s", cmd->arg1 & 0x3F); 1924 break; 1925 case O_REASS: 1926 bprintf(bp, "reass"); 1927 break; 1928 case O_CALLRETURN: 1929 if (cmd->len & F_NOT) 1930 bprintf(bp, "return"); 1931 else 1932 bprint_uint_arg(bp, "call ", cmd->arg1); 1933 break; 1934 default: 1935 bprintf(bp, "** unrecognized action %d len %d ", 1936 cmd->opcode, cmd->len); 1937 } 1938 mark_printed(state, cmd); 1939 1940 return (1); 1941} 1942 1943 1944static ipfw_insn * 1945print_action(struct buf_pr *bp, struct format_opts *fo, 1946 struct show_state *state, uint8_t opcode) 1947{ 1948 ipfw_insn *cmd; 1949 int l; 1950 1951 for (l = state->rule->cmd_len - state->rule->act_ofs, 1952 cmd = ACTION_PTR(state->rule); l > 0; 1953 l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1954 if (cmd->opcode != opcode) 1955 continue; 1956 if (!print_action_instruction(bp, fo, state, cmd)) 1957 continue; 1958 return (cmd); 1959 } 1960 return (NULL); 1961} 1962 1963static void 1964print_proto(struct buf_pr *bp, struct format_opts *fo, 1965 struct show_state *state) 1966{ 1967 ipfw_insn *cmd; 1968 int l, proto, ip4, ip6, tmp; 1969 1970 /* Count all O_PROTO, O_IP4, O_IP6 instructions. */ 1971 proto = tmp = ip4 = ip6 = 0; 1972 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 1973 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1974 switch (cmd->opcode) { 1975 case O_PROTO: 1976 proto++; 1977 break; 1978 case O_IP4: 1979 ip4 = 1; 1980 if (cmd->len & F_OR) 1981 ip4++; 1982 break; 1983 case O_IP6: 1984 ip6 = 1; 1985 if (cmd->len & F_OR) 1986 ip6++; 1987 break; 1988 default: 1989 continue; 1990 } 1991 } 1992 if (proto == 0 && ip4 == 0 && ip6 == 0) { 1993 state->proto = IPPROTO_IP; 1994 state->flags |= HAVE_PROTO; 1995 bprintf(bp, " ip"); 1996 return; 1997 } 1998 /* To handle the case { ip4 or ip6 }, print opcode with F_OR first */ 1999 cmd = NULL; 2000 if (ip4 || ip6) 2001 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP4: O_IP6); 2002 if (cmd != NULL && (cmd->len & F_OR)) 2003 cmd = print_opcode(bp, fo, state, ip4 > ip6 ? O_IP6: O_IP4); 2004 if (cmd == NULL || (cmd->len & F_OR)) 2005 for (l = proto; l > 0; l--) { 2006 cmd = print_opcode(bp, fo, state, O_PROTO); 2007 if (cmd != NULL && (cmd->len & F_OR) == 0) 2008 break; 2009 tmp = cmd->arg1; 2010 } 2011 /* Initialize proto, it is used by print_newports() */ 2012 if (tmp != 0) 2013 state->proto = tmp; 2014 else if (ip6 != 0) 2015 state->proto = IPPROTO_IPV6; 2016 else 2017 state->proto = IPPROTO_IP; 2018 state->flags |= HAVE_PROTO; 2019} 2020 2021static int 2022match_opcode(int opcode, const int opcodes[], size_t nops) 2023{ 2024 int i; 2025 2026 for (i = 0; i < nops; i++) 2027 if (opcode == opcodes[i]) 2028 return (1); 2029 return (0); 2030} 2031 2032static void 2033print_address(struct buf_pr *bp, struct format_opts *fo, 2034 struct show_state *state, const int opcodes[], size_t nops, int portop, 2035 int flag) 2036{ 2037 ipfw_insn *cmd; 2038 int count, l, portcnt, pf; 2039 2040 count = portcnt = 0; 2041 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2042 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2043 if (match_opcode(cmd->opcode, opcodes, nops)) 2044 count++; 2045 else if (cmd->opcode == portop) 2046 portcnt++; 2047 } 2048 if (count == 0) 2049 bprintf(bp, " any"); 2050 for (l = state->rule->act_ofs, cmd = state->rule->cmd; 2051 l > 0 && count > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2052 if (!match_opcode(cmd->opcode, opcodes, nops)) 2053 continue; 2054 print_instruction(bp, fo, state, cmd); 2055 if ((cmd->len & F_OR) == 0) 2056 break; 2057 count--; 2058 } 2059 /* 2060 * If several O_IP_?PORT opcodes specified, leave them to the 2061 * options section. 2062 */ 2063 if (portcnt == 1) { 2064 for (l = state->rule->act_ofs, cmd = state->rule->cmd, pf = 0; 2065 l > 0; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 2066 if (cmd->opcode != portop) { 2067 pf = (cmd->len & F_OR); 2068 continue; 2069 } 2070 /* Print opcode iff it is not in OR block. */ 2071 if (pf == 0 && (cmd->len & F_OR) == 0) 2072 print_instruction(bp, fo, state, cmd); 2073 break; 2074 } 2075 } 2076 state->flags |= flag; 2077} 2078 2079static const int action_opcodes[] = { 2080 O_CHECK_STATE, O_ACCEPT, O_COUNT, O_DENY, O_REJECT, 2081 O_UNREACH6, O_SKIPTO, O_PIPE, O_QUEUE, O_DIVERT, O_TEE, 2082 O_NETGRAPH, O_NGTEE, O_FORWARD_IP, O_FORWARD_IP6, O_NAT, 2083 O_SETFIB, O_SETDSCP, O_REASS, O_CALLRETURN, 2084 /* keep the following opcodes at the end of the list */ 2085 O_EXTERNAL_ACTION, O_EXTERNAL_INSTANCE, O_EXTERNAL_DATA 2086}; 2087 2088static const int modifier_opcodes[] = { 2089 O_LOG, O_ALTQ, O_TAG 2090}; 2091 2092static const int src_opcodes[] = { 2093 O_IP_SRC, O_IP_SRC_LOOKUP, O_IP_SRC_MASK, O_IP_SRC_ME, 2094 O_IP_SRC_SET, O_IP6_SRC, O_IP6_SRC_MASK, O_IP6_SRC_ME 2095}; 2096 2097static const int dst_opcodes[] = { 2098 O_IP_DST, O_IP_DST_LOOKUP, O_IP_DST_MASK, O_IP_DST_ME, 2099 O_IP_DST_SET, O_IP6_DST, O_IP6_DST_MASK, O_IP6_DST_ME 2100}; 2101 2102static void 2103show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 2104 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 2105{ 2106 struct show_state state; 2107 ipfw_insn *cmd; 2108 static int twidth = 0; 2109 int i; 2110 2111 /* Print # DISABLED or skip the rule */ 2112 if ((fo->set_mask & (1 << rule->set)) == 0) { 2113 /* disabled mask */ 2114 if (!co->show_sets) 2115 return; 2116 else 2117 bprintf(bp, "# DISABLED "); 2118 } 2119 if (init_show_state(&state, rule) != 0) { 2120 warn("init_show_state() failed"); 2121 return; 2122 } 2123 bprintf(bp, "%05u ", rule->rulenum); 2124 2125 /* Print counters if enabled */ 2126 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2127 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 2128 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 2129 } 2130 2131 /* Print timestamp */ 2132 if (co->do_time == TIMESTAMP_NUMERIC) 2133 bprintf(bp, "%10u ", cntr->timestamp); 2134 else if (co->do_time == TIMESTAMP_STRING) { 2135 char timestr[30]; 2136 time_t t = (time_t)0; 2137 2138 if (twidth == 0) { 2139 strcpy(timestr, ctime(&t)); 2140 *strchr(timestr, '\n') = '\0'; 2141 twidth = strlen(timestr); 2142 } 2143 if (cntr->timestamp > 0) { 2144 t = _long_to_time(cntr->timestamp); 2145 2146 strcpy(timestr, ctime(&t)); 2147 *strchr(timestr, '\n') = '\0'; 2148 bprintf(bp, "%s ", timestr); 2149 } else { 2150 bprintf(bp, "%*s", twidth, " "); 2151 } 2152 } 2153 2154 /* Print set number */ 2155 if (co->show_sets) 2156 bprintf(bp, "set %d ", rule->set); 2157 2158 /* Print the optional "match probability" */ 2159 cmd = print_opcode(bp, fo, &state, O_PROB); 2160 /* Print rule action */ 2161 for (i = 0; i < nitems(action_opcodes); i++) { 2162 cmd = print_action(bp, fo, &state, action_opcodes[i]); 2163 if (cmd == NULL) 2164 continue; 2165 /* Handle special cases */ 2166 switch (cmd->opcode) { 2167 case O_CHECK_STATE: 2168 goto end; 2169 case O_EXTERNAL_ACTION: 2170 case O_EXTERNAL_INSTANCE: 2171 /* External action can have several instructions */ 2172 continue; 2173 } 2174 break; 2175 } 2176 /* Print rule modifiers */ 2177 for (i = 0; i < nitems(modifier_opcodes); i++) 2178 print_action(bp, fo, &state, modifier_opcodes[i]); 2179 /* 2180 * Print rule body 2181 */ 2182 if (co->comment_only != 0) 2183 goto end; 2184 print_proto(bp, fo, &state); 2185 2186 /* Print source */ 2187 bprintf(bp, " from"); 2188 print_address(bp, fo, &state, src_opcodes, nitems(src_opcodes), 2189 O_IP_SRCPORT, HAVE_SRCIP); 2190 2191 /* Print destination */ 2192 bprintf(bp, " to"); 2193 print_address(bp, fo, &state, dst_opcodes, nitems(dst_opcodes), 2194 O_IP_DSTPORT, HAVE_DSTIP); 2195 2196 /* Print the rest of options */ 2197 while (print_opcode(bp, fo, &state, 0)) 2198 ; 2199end: 2200 /* Print comment at the end */ 2201 cmd = print_opcode(bp, fo, &state, O_NOP); 2202 if (co->comment_only != 0 && cmd == NULL) 2203 bprintf(bp, " // ..."); 2204 bprintf(bp, "\n"); 2205 free_show_state(&state); 2206} 2207 2208static void 2209show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2210 struct buf_pr *bp, ipfw_dyn_rule *d) 2211{ 2212 struct protoent *pe; 2213 struct in_addr a; 2214 uint16_t rulenum; 2215 char buf[INET6_ADDRSTRLEN]; 2216 2217 if (!co->do_expired) { 2218 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2219 return; 2220 } 2221 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2222 bprintf(bp, "%05d", rulenum); 2223 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2224 bprintf(bp, " "); 2225 pr_u64(bp, &d->pcnt, fo->pcwidth); 2226 pr_u64(bp, &d->bcnt, fo->bcwidth); 2227 bprintf(bp, "(%ds)", d->expire); 2228 } 2229 switch (d->dyn_type) { 2230 case O_LIMIT_PARENT: 2231 bprintf(bp, " PARENT %d", d->count); 2232 break; 2233 case O_LIMIT: 2234 bprintf(bp, " LIMIT"); 2235 break; 2236 case O_KEEP_STATE: /* bidir, no mask */ 2237 bprintf(bp, " STATE"); 2238 break; 2239 } 2240 2241 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2242 bprintf(bp, " %s", pe->p_name); 2243 else 2244 bprintf(bp, " proto %u", d->id.proto); 2245 2246 if (d->id.addr_type == 4) { 2247 a.s_addr = htonl(d->id.src_ip); 2248 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2249 2250 a.s_addr = htonl(d->id.dst_ip); 2251 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2252 } else if (d->id.addr_type == 6) { 2253 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2254 sizeof(buf)), d->id.src_port); 2255 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2256 buf, sizeof(buf)), d->id.dst_port); 2257 } else 2258 bprintf(bp, " UNKNOWN <-> UNKNOWN"); 2259 if (d->kidx != 0) 2260 bprintf(bp, " :%s", object_search_ctlv(fo->tstate, 2261 d->kidx, IPFW_TLV_STATE_NAME)); 2262} 2263 2264static int 2265do_range_cmd(int cmd, ipfw_range_tlv *rt) 2266{ 2267 ipfw_range_header rh; 2268 size_t sz; 2269 2270 memset(&rh, 0, sizeof(rh)); 2271 memcpy(&rh.range, rt, sizeof(*rt)); 2272 rh.range.head.length = sizeof(*rt); 2273 rh.range.head.type = IPFW_TLV_RANGE; 2274 sz = sizeof(rh); 2275 2276 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2277 return (-1); 2278 /* Save number of matched objects */ 2279 rt->new_set = rh.range.new_set; 2280 return (0); 2281} 2282 2283/* 2284 * This one handles all set-related commands 2285 * ipfw set { show | enable | disable } 2286 * ipfw set swap X Y 2287 * ipfw set move X to Y 2288 * ipfw set move rule X to Y 2289 */ 2290void 2291ipfw_sets_handler(char *av[]) 2292{ 2293 ipfw_range_tlv rt; 2294 char *msg; 2295 size_t size; 2296 uint32_t masks[2]; 2297 int i; 2298 uint16_t rulenum; 2299 uint8_t cmd; 2300 2301 av++; 2302 memset(&rt, 0, sizeof(rt)); 2303 2304 if (av[0] == NULL) 2305 errx(EX_USAGE, "set needs command"); 2306 if (_substrcmp(*av, "show") == 0) { 2307 struct format_opts fo; 2308 ipfw_cfg_lheader *cfg; 2309 2310 memset(&fo, 0, sizeof(fo)); 2311 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2312 err(EX_OSERR, "requesting config failed"); 2313 2314 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2315 if ((cfg->set_mask & (1<<i)) == 0) { 2316 printf("%s %d", msg, i); 2317 msg = ""; 2318 } 2319 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2320 for (i = 0; i < RESVD_SET; i++) 2321 if ((cfg->set_mask & (1<<i)) != 0) { 2322 printf("%s %d", msg, i); 2323 msg = ""; 2324 } 2325 printf("\n"); 2326 free(cfg); 2327 } else if (_substrcmp(*av, "swap") == 0) { 2328 av++; 2329 if ( av[0] == NULL || av[1] == NULL ) 2330 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2331 rt.set = atoi(av[0]); 2332 rt.new_set = atoi(av[1]); 2333 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2334 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2335 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2336 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2337 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2338 } else if (_substrcmp(*av, "move") == 0) { 2339 av++; 2340 if (av[0] && _substrcmp(*av, "rule") == 0) { 2341 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2342 cmd = IP_FW_XMOVE; 2343 av++; 2344 } else 2345 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2346 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2347 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2348 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2349 rulenum = atoi(av[0]); 2350 rt.new_set = atoi(av[2]); 2351 if (cmd == IP_FW_XMOVE) { 2352 rt.start_rule = rulenum; 2353 rt.end_rule = rulenum; 2354 } else 2355 rt.set = rulenum; 2356 rt.new_set = atoi(av[2]); 2357 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2358 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2359 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2360 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2361 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2362 i = do_range_cmd(cmd, &rt); 2363 if (i < 0) 2364 err(EX_OSERR, "failed to move %s", 2365 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2366 } else if (_substrcmp(*av, "disable") == 0 || 2367 _substrcmp(*av, "enable") == 0 ) { 2368 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2369 2370 av++; 2371 masks[0] = masks[1] = 0; 2372 2373 while (av[0]) { 2374 if (isdigit(**av)) { 2375 i = atoi(*av); 2376 if (i < 0 || i > RESVD_SET) 2377 errx(EX_DATAERR, 2378 "invalid set number %d\n", i); 2379 masks[which] |= (1<<i); 2380 } else if (_substrcmp(*av, "disable") == 0) 2381 which = 0; 2382 else if (_substrcmp(*av, "enable") == 0) 2383 which = 1; 2384 else 2385 errx(EX_DATAERR, 2386 "invalid set command %s\n", *av); 2387 av++; 2388 } 2389 if ( (masks[0] & masks[1]) != 0 ) 2390 errx(EX_DATAERR, 2391 "cannot enable and disable the same set\n"); 2392 2393 rt.set = masks[0]; 2394 rt.new_set = masks[1]; 2395 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2396 if (i) 2397 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2398 } else 2399 errx(EX_USAGE, "invalid set command %s\n", *av); 2400} 2401 2402void 2403ipfw_sysctl_handler(char *av[], int which) 2404{ 2405 av++; 2406 2407 if (av[0] == NULL) { 2408 warnx("missing keyword to enable/disable\n"); 2409 } else if (_substrcmp(*av, "firewall") == 0) { 2410 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2411 &which, sizeof(which)); 2412 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2413 &which, sizeof(which)); 2414 } else if (_substrcmp(*av, "one_pass") == 0) { 2415 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2416 &which, sizeof(which)); 2417 } else if (_substrcmp(*av, "debug") == 0) { 2418 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2419 &which, sizeof(which)); 2420 } else if (_substrcmp(*av, "verbose") == 0) { 2421 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2422 &which, sizeof(which)); 2423 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2424 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2425 &which, sizeof(which)); 2426#ifndef NO_ALTQ 2427 } else if (_substrcmp(*av, "altq") == 0) { 2428 altq_set_enabled(which); 2429#endif 2430 } else { 2431 warnx("unrecognize enable/disable keyword: %s\n", *av); 2432 } 2433} 2434 2435typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2436 void *arg, void *state); 2437 2438static void 2439prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2440 void *arg, void *_state) 2441{ 2442 ipfw_dyn_rule *d; 2443 int width; 2444 uint8_t set; 2445 2446 d = (ipfw_dyn_rule *)_state; 2447 /* Count _ALL_ states */ 2448 fo->dcnt++; 2449 2450 if (fo->show_counters == 0) 2451 return; 2452 2453 if (co->use_set) { 2454 /* skip states from another set */ 2455 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2456 sizeof(uint8_t)); 2457 if (set != co->use_set - 1) 2458 return; 2459 } 2460 2461 width = pr_u64(NULL, &d->pcnt, 0); 2462 if (width > fo->pcwidth) 2463 fo->pcwidth = width; 2464 2465 width = pr_u64(NULL, &d->bcnt, 0); 2466 if (width > fo->bcwidth) 2467 fo->bcwidth = width; 2468} 2469 2470static int 2471foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2472 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2473{ 2474 int ttype; 2475 state_cb *fptr; 2476 void *farg; 2477 ipfw_obj_tlv *tlv; 2478 ipfw_obj_ctlv *ctlv; 2479 2480 fptr = NULL; 2481 ttype = 0; 2482 2483 while (sz > 0) { 2484 ctlv = (ipfw_obj_ctlv *)base; 2485 switch (ctlv->head.type) { 2486 case IPFW_TLV_DYNSTATE_LIST: 2487 base += sizeof(*ctlv); 2488 sz -= sizeof(*ctlv); 2489 ttype = IPFW_TLV_DYN_ENT; 2490 fptr = dyn_bc; 2491 farg = dyn_arg; 2492 break; 2493 default: 2494 return (sz); 2495 } 2496 2497 while (sz > 0) { 2498 tlv = (ipfw_obj_tlv *)base; 2499 if (tlv->type != ttype) 2500 break; 2501 2502 fptr(co, fo, farg, tlv + 1); 2503 sz -= tlv->length; 2504 base += tlv->length; 2505 } 2506 } 2507 2508 return (sz); 2509} 2510 2511static void 2512prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2513 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2514{ 2515 int bcwidth, pcwidth, width; 2516 int n; 2517 struct ip_fw_bcounter *cntr; 2518 struct ip_fw_rule *r; 2519 2520 bcwidth = 0; 2521 pcwidth = 0; 2522 if (fo->show_counters != 0) { 2523 for (n = 0; n < rcnt; n++, 2524 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2525 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2526 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2527 /* skip rules from another set */ 2528 if (co->use_set && r->set != co->use_set - 1) 2529 continue; 2530 2531 /* packet counter */ 2532 width = pr_u64(NULL, &cntr->pcnt, 0); 2533 if (width > pcwidth) 2534 pcwidth = width; 2535 2536 /* byte counter */ 2537 width = pr_u64(NULL, &cntr->bcnt, 0); 2538 if (width > bcwidth) 2539 bcwidth = width; 2540 } 2541 } 2542 fo->bcwidth = bcwidth; 2543 fo->pcwidth = pcwidth; 2544 2545 fo->dcnt = 0; 2546 if (co->do_dynamic && dynsz > 0) 2547 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2548} 2549 2550static int 2551list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2552 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2553{ 2554 int n, seen; 2555 struct ip_fw_rule *r; 2556 struct ip_fw_bcounter *cntr; 2557 int c = 0; 2558 2559 for (n = seen = 0; n < rcnt; n++, 2560 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2561 2562 if ((fo->show_counters | fo->show_time) != 0) { 2563 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2564 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2565 } else { 2566 cntr = NULL; 2567 r = (struct ip_fw_rule *)(rtlv + 1); 2568 } 2569 if (r->rulenum > fo->last) 2570 break; 2571 if (co->use_set && r->set != co->use_set - 1) 2572 continue; 2573 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2574 show_static_rule(co, fo, bp, r, cntr); 2575 printf("%s", bp->buf); 2576 c += rtlv->length; 2577 bp_flush(bp); 2578 seen++; 2579 } 2580 } 2581 2582 return (seen); 2583} 2584 2585static void 2586list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2587 void *_arg, void *_state) 2588{ 2589 uint16_t rulenum; 2590 uint8_t set; 2591 ipfw_dyn_rule *d; 2592 struct buf_pr *bp; 2593 2594 d = (ipfw_dyn_rule *)_state; 2595 bp = (struct buf_pr *)_arg; 2596 2597 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2598 if (rulenum > fo->last) 2599 return; 2600 if (co->use_set) { 2601 bcopy((char *)&d->rule + sizeof(uint16_t), 2602 &set, sizeof(uint8_t)); 2603 if (set != co->use_set - 1) 2604 return; 2605 } 2606 if (rulenum >= fo->first) { 2607 show_dyn_state(co, fo, bp, d); 2608 printf("%s\n", bp->buf); 2609 bp_flush(bp); 2610 } 2611} 2612 2613static int 2614list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2615 struct buf_pr *bp, caddr_t base, size_t sz) 2616{ 2617 2618 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2619 return (sz); 2620} 2621 2622void 2623ipfw_list(int ac, char *av[], int show_counters) 2624{ 2625 ipfw_cfg_lheader *cfg; 2626 struct format_opts sfo; 2627 size_t sz; 2628 int error; 2629 int lac; 2630 char **lav; 2631 uint32_t rnum; 2632 char *endptr; 2633 2634 if (co.test_only) { 2635 fprintf(stderr, "Testing only, list disabled\n"); 2636 return; 2637 } 2638 if (co.do_pipe) { 2639 dummynet_list(ac, av, show_counters); 2640 return; 2641 } 2642 2643 ac--; 2644 av++; 2645 memset(&sfo, 0, sizeof(sfo)); 2646 2647 /* Determine rule range to request */ 2648 if (ac > 0) { 2649 for (lac = ac, lav = av; lac != 0; lac--) { 2650 rnum = strtoul(*lav++, &endptr, 10); 2651 if (sfo.first == 0 || rnum < sfo.first) 2652 sfo.first = rnum; 2653 2654 if (*endptr == '-') 2655 rnum = strtoul(endptr + 1, &endptr, 10); 2656 if (sfo.last == 0 || rnum > sfo.last) 2657 sfo.last = rnum; 2658 } 2659 } 2660 2661 /* get configuraion from kernel */ 2662 cfg = NULL; 2663 sfo.show_counters = show_counters; 2664 sfo.show_time = co.do_time; 2665 sfo.flags = IPFW_CFG_GET_STATIC; 2666 if (co.do_dynamic != 0) 2667 sfo.flags |= IPFW_CFG_GET_STATES; 2668 if ((sfo.show_counters | sfo.show_time) != 0) 2669 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2670 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2671 err(EX_OSERR, "retrieving config failed"); 2672 2673 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2674 2675 free(cfg); 2676 2677 if (error != EX_OK) 2678 exit(error); 2679} 2680 2681static int 2682ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2683 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2684{ 2685 caddr_t dynbase; 2686 size_t dynsz; 2687 int rcnt; 2688 int exitval = EX_OK; 2689 int lac; 2690 char **lav; 2691 char *endptr; 2692 size_t readsz; 2693 struct buf_pr bp; 2694 ipfw_obj_ctlv *ctlv, *tstate; 2695 ipfw_obj_tlv *rbase; 2696 2697 /* 2698 * Handle tablenames TLV first, if any 2699 */ 2700 tstate = NULL; 2701 rbase = NULL; 2702 dynbase = NULL; 2703 dynsz = 0; 2704 readsz = sizeof(*cfg); 2705 rcnt = 0; 2706 2707 fo->set_mask = cfg->set_mask; 2708 2709 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2710 2711 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2712 /* We've requested static rules */ 2713 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2714 object_sort_ctlv(ctlv); 2715 fo->tstate = ctlv; 2716 readsz += ctlv->head.length; 2717 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2718 ctlv->head.length); 2719 } 2720 2721 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2722 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2723 rcnt = ctlv->count; 2724 readsz += ctlv->head.length; 2725 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2726 ctlv->head.length); 2727 } 2728 } 2729 2730 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2731 /* We may have some dynamic states */ 2732 dynsz = sz - readsz; 2733 /* Skip empty header */ 2734 if (dynsz != sizeof(ipfw_obj_ctlv)) 2735 dynbase = (caddr_t)ctlv; 2736 else 2737 dynsz = 0; 2738 } 2739 2740 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2741 bp_alloc(&bp, 4096); 2742 2743 /* if no rule numbers were specified, list all rules */ 2744 if (ac == 0) { 2745 fo->first = 0; 2746 fo->last = IPFW_DEFAULT_RULE; 2747 list_static_range(co, fo, &bp, rbase, rcnt); 2748 2749 if (co->do_dynamic && dynsz > 0) { 2750 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2751 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2752 } 2753 2754 bp_free(&bp); 2755 return (EX_OK); 2756 } 2757 2758 /* display specific rules requested on command line */ 2759 for (lac = ac, lav = av; lac != 0; lac--) { 2760 /* convert command line rule # */ 2761 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2762 if (*endptr == '-') 2763 fo->last = strtoul(endptr + 1, &endptr, 10); 2764 if (*endptr) { 2765 exitval = EX_USAGE; 2766 warnx("invalid rule number: %s", *(lav - 1)); 2767 continue; 2768 } 2769 2770 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2771 /* give precedence to other error(s) */ 2772 if (exitval == EX_OK) 2773 exitval = EX_UNAVAILABLE; 2774 if (fo->first == fo->last) 2775 warnx("rule %u does not exist", fo->first); 2776 else 2777 warnx("no rules in range %u-%u", 2778 fo->first, fo->last); 2779 } 2780 } 2781 2782 if (co->do_dynamic && dynsz > 0) { 2783 printf("## Dynamic rules:\n"); 2784 for (lac = ac, lav = av; lac != 0; lac--) { 2785 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2786 if (*endptr == '-') 2787 fo->last = strtoul(endptr+1, &endptr, 10); 2788 if (*endptr) 2789 /* already warned */ 2790 continue; 2791 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2792 } 2793 } 2794 2795 bp_free(&bp); 2796 return (exitval); 2797} 2798 2799 2800/* 2801 * Retrieves current ipfw configuration of given type 2802 * and stores its pointer to @pcfg. 2803 * 2804 * Caller is responsible for freeing @pcfg. 2805 * 2806 * Returns 0 on success. 2807 */ 2808 2809static int 2810ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2811 ipfw_cfg_lheader **pcfg, size_t *psize) 2812{ 2813 ipfw_cfg_lheader *cfg; 2814 size_t sz; 2815 int i; 2816 2817 2818 if (co->test_only != 0) { 2819 fprintf(stderr, "Testing only, list disabled\n"); 2820 return (0); 2821 } 2822 2823 /* Start with some data size */ 2824 sz = 4096; 2825 cfg = NULL; 2826 2827 for (i = 0; i < 16; i++) { 2828 if (cfg != NULL) 2829 free(cfg); 2830 if ((cfg = calloc(1, sz)) == NULL) 2831 return (ENOMEM); 2832 2833 cfg->flags = fo->flags; 2834 cfg->start_rule = fo->first; 2835 cfg->end_rule = fo->last; 2836 2837 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2838 if (errno != ENOMEM) { 2839 free(cfg); 2840 return (errno); 2841 } 2842 2843 /* Buffer size is not enough. Try to increase */ 2844 sz = sz * 2; 2845 if (sz < cfg->size) 2846 sz = cfg->size; 2847 continue; 2848 } 2849 2850 *pcfg = cfg; 2851 *psize = sz; 2852 return (0); 2853 } 2854 2855 free(cfg); 2856 return (ENOMEM); 2857} 2858 2859static int 2860lookup_host (char *host, struct in_addr *ipaddr) 2861{ 2862 struct hostent *he; 2863 2864 if (!inet_aton(host, ipaddr)) { 2865 if ((he = gethostbyname(host)) == NULL) 2866 return(-1); 2867 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2868 } 2869 return(0); 2870} 2871 2872struct tidx { 2873 ipfw_obj_ntlv *idx; 2874 uint32_t count; 2875 uint32_t size; 2876 uint16_t counter; 2877 uint8_t set; 2878}; 2879 2880int 2881ipfw_check_object_name(const char *name) 2882{ 2883 int c, i, l; 2884 2885 /* 2886 * Check that name is null-terminated and contains 2887 * valid symbols only. Valid mask is: 2888 * [a-zA-Z0-9\-_\.]{1,63} 2889 */ 2890 l = strlen(name); 2891 if (l == 0 || l >= 64) 2892 return (EINVAL); 2893 for (i = 0; i < l; i++) { 2894 c = name[i]; 2895 if (isalpha(c) || isdigit(c) || c == '_' || 2896 c == '-' || c == '.') 2897 continue; 2898 return (EINVAL); 2899 } 2900 return (0); 2901} 2902 2903static char *default_state_name = "default"; 2904static int 2905state_check_name(const char *name) 2906{ 2907 2908 if (ipfw_check_object_name(name) != 0) 2909 return (EINVAL); 2910 if (strcmp(name, "any") == 0) 2911 return (EINVAL); 2912 return (0); 2913} 2914 2915static int 2916eaction_check_name(const char *name) 2917{ 2918 2919 if (ipfw_check_object_name(name) != 0) 2920 return (EINVAL); 2921 /* Restrict some 'special' names */ 2922 if (match_token(rule_actions, name) != -1 && 2923 match_token(rule_action_params, name) != -1) 2924 return (EINVAL); 2925 return (0); 2926} 2927 2928static uint16_t 2929pack_object(struct tidx *tstate, char *name, int otype) 2930{ 2931 int i; 2932 ipfw_obj_ntlv *ntlv; 2933 2934 for (i = 0; i < tstate->count; i++) { 2935 if (strcmp(tstate->idx[i].name, name) != 0) 2936 continue; 2937 if (tstate->idx[i].set != tstate->set) 2938 continue; 2939 if (tstate->idx[i].head.type != otype) 2940 continue; 2941 2942 return (tstate->idx[i].idx); 2943 } 2944 2945 if (tstate->count + 1 > tstate->size) { 2946 tstate->size += 4; 2947 tstate->idx = realloc(tstate->idx, tstate->size * 2948 sizeof(ipfw_obj_ntlv)); 2949 if (tstate->idx == NULL) 2950 return (0); 2951 } 2952 2953 ntlv = &tstate->idx[i]; 2954 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2955 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2956 ntlv->head.type = otype; 2957 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2958 ntlv->set = tstate->set; 2959 ntlv->idx = ++tstate->counter; 2960 tstate->count++; 2961 2962 return (ntlv->idx); 2963} 2964 2965static uint16_t 2966pack_table(struct tidx *tstate, char *name) 2967{ 2968 2969 if (table_check_name(name) != 0) 2970 return (0); 2971 2972 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2973} 2974 2975void 2976fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 2977 struct tidx *tstate) 2978{ 2979 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2980 uint16_t uidx; 2981 char *p; 2982 2983 if ((p = strchr(av + 6, ')')) == NULL) 2984 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2985 *p = '\0'; 2986 p = strchr(av + 6, ','); 2987 if (p) 2988 *p++ = '\0'; 2989 2990 if ((uidx = pack_table(tstate, av + 6)) == 0) 2991 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2992 2993 cmd->opcode = opcode; 2994 cmd->arg1 = uidx; 2995 if (p) { 2996 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2997 d[0] = strtoul(p, NULL, 0); 2998 } else 2999 cmd->len |= F_INSN_SIZE(ipfw_insn); 3000} 3001 3002 3003/* 3004 * fills the addr and mask fields in the instruction as appropriate from av. 3005 * Update length as appropriate. 3006 * The following formats are allowed: 3007 * me returns O_IP_*_ME 3008 * 1.2.3.4 single IP address 3009 * 1.2.3.4:5.6.7.8 address:mask 3010 * 1.2.3.4/24 address/mask 3011 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 3012 * We can have multiple comma-separated address/mask entries. 3013 */ 3014static void 3015fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 3016{ 3017 int len = 0; 3018 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 3019 3020 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 3021 3022 if (_substrcmp(av, "any") == 0) 3023 return; 3024 3025 if (_substrcmp(av, "me") == 0) { 3026 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 3027 return; 3028 } 3029 3030 if (strncmp(av, "table(", 6) == 0) { 3031 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 3032 return; 3033 } 3034 3035 while (av) { 3036 /* 3037 * After the address we can have '/' or ':' indicating a mask, 3038 * ',' indicating another address follows, '{' indicating a 3039 * set of addresses of unspecified size. 3040 */ 3041 char *t = NULL, *p = strpbrk(av, "/:,{"); 3042 int masklen; 3043 char md, nd = '\0'; 3044 3045 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 3046 3047 if (p) { 3048 md = *p; 3049 *p++ = '\0'; 3050 if ((t = strpbrk(p, ",{")) != NULL) { 3051 nd = *t; 3052 *t = '\0'; 3053 } 3054 } else 3055 md = '\0'; 3056 3057 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 3058 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 3059 switch (md) { 3060 case ':': 3061 if (!inet_aton(p, (struct in_addr *)&d[1])) 3062 errx(EX_DATAERR, "bad netmask ``%s''", p); 3063 break; 3064 case '/': 3065 masklen = atoi(p); 3066 if (masklen == 0) 3067 d[1] = htonl(0U); /* mask */ 3068 else if (masklen > 32) 3069 errx(EX_DATAERR, "bad width ``%s''", p); 3070 else 3071 d[1] = htonl(~0U << (32 - masklen)); 3072 break; 3073 case '{': /* no mask, assume /24 and put back the '{' */ 3074 d[1] = htonl(~0U << (32 - 24)); 3075 *(--p) = md; 3076 break; 3077 3078 case ',': /* single address plus continuation */ 3079 *(--p) = md; 3080 /* FALLTHROUGH */ 3081 case 0: /* initialization value */ 3082 default: 3083 d[1] = htonl(~0U); /* force /32 */ 3084 break; 3085 } 3086 d[0] &= d[1]; /* mask base address with mask */ 3087 if (t) 3088 *t = nd; 3089 /* find next separator */ 3090 if (p) 3091 p = strpbrk(p, ",{"); 3092 if (p && *p == '{') { 3093 /* 3094 * We have a set of addresses. They are stored as follows: 3095 * arg1 is the set size (powers of 2, 2..256) 3096 * addr is the base address IN HOST FORMAT 3097 * mask.. is an array of arg1 bits (rounded up to 3098 * the next multiple of 32) with bits set 3099 * for each host in the map. 3100 */ 3101 uint32_t *map = (uint32_t *)&cmd->mask; 3102 int low, high; 3103 int i = contigmask((uint8_t *)&(d[1]), 32); 3104 3105 if (len > 0) 3106 errx(EX_DATAERR, "address set cannot be in a list"); 3107 if (i < 24 || i > 31) 3108 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3109 cmd->o.arg1 = 1<<(32-i); /* map length */ 3110 d[0] = ntohl(d[0]); /* base addr in host format */ 3111 cmd->o.opcode = O_IP_DST_SET; /* default */ 3112 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3113 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3114 map[i] = 0; /* clear map */ 3115 3116 av = p + 1; 3117 low = d[0] & 0xff; 3118 high = low + cmd->o.arg1 - 1; 3119 /* 3120 * Here, i stores the previous value when we specify a range 3121 * of addresses within a mask, e.g. 45-63. i = -1 means we 3122 * have no previous value. 3123 */ 3124 i = -1; /* previous value in a range */ 3125 while (isdigit(*av)) { 3126 char *s; 3127 int a = strtol(av, &s, 0); 3128 3129 if (s == av) { /* no parameter */ 3130 if (*av != '}') 3131 errx(EX_DATAERR, "set not closed\n"); 3132 if (i != -1) 3133 errx(EX_DATAERR, "incomplete range %d-", i); 3134 break; 3135 } 3136 if (a < low || a > high) 3137 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3138 a, low, high); 3139 a -= low; 3140 if (i == -1) /* no previous in range */ 3141 i = a; 3142 else { /* check that range is valid */ 3143 if (i > a) 3144 errx(EX_DATAERR, "invalid range %d-%d", 3145 i+low, a+low); 3146 if (*s == '-') 3147 errx(EX_DATAERR, "double '-' in range"); 3148 } 3149 for (; i <= a; i++) 3150 map[i/32] |= 1<<(i & 31); 3151 i = -1; 3152 if (*s == '-') 3153 i = a; 3154 else if (*s == '}') 3155 break; 3156 av = s+1; 3157 } 3158 return; 3159 } 3160 av = p; 3161 if (av) /* then *av must be a ',' */ 3162 av++; 3163 3164 /* Check this entry */ 3165 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3166 /* 3167 * 'any' turns the entire list into a NOP. 3168 * 'not any' never matches, so it is removed from the 3169 * list unless it is the only item, in which case we 3170 * report an error. 3171 */ 3172 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3173 if (av == NULL && len == 0) /* only this entry */ 3174 errx(EX_DATAERR, "not any never matches"); 3175 } 3176 /* else do nothing and skip this entry */ 3177 return; 3178 } 3179 /* A single IP can be stored in an optimized format */ 3180 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3181 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3182 return; 3183 } 3184 len += 2; /* two words... */ 3185 d += 2; 3186 } /* end while */ 3187 if (len + 1 > F_LEN_MASK) 3188 errx(EX_DATAERR, "address list too long"); 3189 cmd->o.len |= len+1; 3190} 3191 3192 3193/* n2mask sets n bits of the mask */ 3194void 3195n2mask(struct in6_addr *mask, int n) 3196{ 3197 static int minimask[9] = 3198 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3199 u_char *p; 3200 3201 memset(mask, 0, sizeof(struct in6_addr)); 3202 p = (u_char *) mask; 3203 for (; n > 0; p++, n -= 8) { 3204 if (n >= 8) 3205 *p = 0xff; 3206 else 3207 *p = minimask[n]; 3208 } 3209 return; 3210} 3211 3212static void 3213fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3214 struct _s_x *flags, char *p) 3215{ 3216 char *e; 3217 uint32_t set = 0, clear = 0; 3218 3219 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3220 errx(EX_DATAERR, "invalid flag %s", e); 3221 3222 cmd->opcode = opcode; 3223 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3224 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3225} 3226 3227 3228void 3229ipfw_delete(char *av[]) 3230{ 3231 ipfw_range_tlv rt; 3232 char *sep; 3233 int i, j; 3234 int exitval = EX_OK; 3235 int do_set = 0; 3236 3237 av++; 3238 NEED1("missing rule specification"); 3239 if ( *av && _substrcmp(*av, "set") == 0) { 3240 /* Do not allow using the following syntax: 3241 * ipfw set N delete set M 3242 */ 3243 if (co.use_set) 3244 errx(EX_DATAERR, "invalid syntax"); 3245 do_set = 1; /* delete set */ 3246 av++; 3247 } 3248 3249 /* Rule number */ 3250 while (*av && isdigit(**av)) { 3251 i = strtol(*av, &sep, 10); 3252 j = i; 3253 if (*sep== '-') 3254 j = strtol(sep + 1, NULL, 10); 3255 av++; 3256 if (co.do_nat) { 3257 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3258 if (exitval) { 3259 exitval = EX_UNAVAILABLE; 3260 warn("rule %u not available", i); 3261 } 3262 } else if (co.do_pipe) { 3263 exitval = ipfw_delete_pipe(co.do_pipe, i); 3264 } else { 3265 memset(&rt, 0, sizeof(rt)); 3266 if (do_set != 0) { 3267 rt.set = i & 31; 3268 rt.flags = IPFW_RCFLAG_SET; 3269 } else { 3270 rt.start_rule = i & 0xffff; 3271 rt.end_rule = j & 0xffff; 3272 if (rt.start_rule == 0 && rt.end_rule == 0) 3273 rt.flags |= IPFW_RCFLAG_ALL; 3274 else 3275 rt.flags |= IPFW_RCFLAG_RANGE; 3276 if (co.use_set != 0) { 3277 rt.set = co.use_set - 1; 3278 rt.flags |= IPFW_RCFLAG_SET; 3279 } 3280 } 3281 i = do_range_cmd(IP_FW_XDEL, &rt); 3282 if (i != 0) { 3283 exitval = EX_UNAVAILABLE; 3284 warn("rule %u: setsockopt(IP_FW_XDEL)", 3285 rt.start_rule); 3286 } else if (rt.new_set == 0 && do_set == 0) { 3287 exitval = EX_UNAVAILABLE; 3288 if (rt.start_rule != rt.end_rule) 3289 warnx("no rules rules in %u-%u range", 3290 rt.start_rule, rt.end_rule); 3291 else 3292 warnx("rule %u not found", 3293 rt.start_rule); 3294 } 3295 } 3296 } 3297 if (exitval != EX_OK) 3298 exit(exitval); 3299} 3300 3301 3302/* 3303 * fill the interface structure. We do not check the name as we can 3304 * create interfaces dynamically, so checking them at insert time 3305 * makes relatively little sense. 3306 * Interface names containing '*', '?', or '[' are assumed to be shell 3307 * patterns which match interfaces. 3308 */ 3309static void 3310fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3311{ 3312 char *p; 3313 uint16_t uidx; 3314 3315 cmd->name[0] = '\0'; 3316 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3317 3318 CHECK_CMDLEN; 3319 3320 /* Parse the interface or address */ 3321 if (strcmp(arg, "any") == 0) 3322 cmd->o.len = 0; /* effectively ignore this command */ 3323 else if (strncmp(arg, "table(", 6) == 0) { 3324 if ((p = strchr(arg + 6, ')')) == NULL) 3325 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3326 *p = '\0'; 3327 p = strchr(arg + 6, ','); 3328 if (p) 3329 *p++ = '\0'; 3330 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3331 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3332 3333 cmd->name[0] = '\1'; /* Special value indicating table */ 3334 cmd->p.kidx = uidx; 3335 } else if (!isdigit(*arg)) { 3336 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3337 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3338 } else if (!inet_aton(arg, &cmd->p.ip)) 3339 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3340} 3341 3342static void 3343get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3344{ 3345 int i; 3346 size_t l; 3347 char *ap, *ptr, *optr; 3348 struct ether_addr *mac; 3349 const char *macset = "0123456789abcdefABCDEF:"; 3350 3351 if (strcmp(p, "any") == 0) { 3352 for (i = 0; i < ETHER_ADDR_LEN; i++) 3353 addr[i] = mask[i] = 0; 3354 return; 3355 } 3356 3357 optr = ptr = strdup(p); 3358 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3359 l = strlen(ap); 3360 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3361 errx(EX_DATAERR, "Incorrect MAC address"); 3362 bcopy(mac, addr, ETHER_ADDR_LEN); 3363 } else 3364 errx(EX_DATAERR, "Incorrect MAC address"); 3365 3366 if (ptr != NULL) { /* we have mask? */ 3367 if (p[ptr - optr - 1] == '/') { /* mask len */ 3368 long ml = strtol(ptr, &ap, 10); 3369 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3370 errx(EX_DATAERR, "Incorrect mask length"); 3371 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3372 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3373 } else { /* mask */ 3374 l = strlen(ptr); 3375 if (strspn(ptr, macset) != l || 3376 (mac = ether_aton(ptr)) == NULL) 3377 errx(EX_DATAERR, "Incorrect mask"); 3378 bcopy(mac, mask, ETHER_ADDR_LEN); 3379 } 3380 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3381 for (i = 0; i < ETHER_ADDR_LEN; i++) 3382 mask[i] = 0xff; 3383 } 3384 for (i = 0; i < ETHER_ADDR_LEN; i++) 3385 addr[i] &= mask[i]; 3386 3387 free(optr); 3388} 3389 3390/* 3391 * helper function, updates the pointer to cmd with the length 3392 * of the current command, and also cleans up the first word of 3393 * the new command in case it has been clobbered before. 3394 */ 3395static ipfw_insn * 3396next_cmd(ipfw_insn *cmd, int *len) 3397{ 3398 *len -= F_LEN(cmd); 3399 CHECK_LENGTH(*len, 0); 3400 cmd += F_LEN(cmd); 3401 bzero(cmd, sizeof(*cmd)); 3402 return cmd; 3403} 3404 3405/* 3406 * Takes arguments and copies them into a comment 3407 */ 3408static void 3409fill_comment(ipfw_insn *cmd, char **av, int cblen) 3410{ 3411 int i, l; 3412 char *p = (char *)(cmd + 1); 3413 3414 cmd->opcode = O_NOP; 3415 cmd->len = (cmd->len & (F_NOT | F_OR)); 3416 3417 /* Compute length of comment string. */ 3418 for (i = 0, l = 0; av[i] != NULL; i++) 3419 l += strlen(av[i]) + 1; 3420 if (l == 0) 3421 return; 3422 if (l > 84) 3423 errx(EX_DATAERR, 3424 "comment too long (max 80 chars)"); 3425 l = 1 + (l+3)/4; 3426 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3427 CHECK_CMDLEN; 3428 3429 for (i = 0; av[i] != NULL; i++) { 3430 strcpy(p, av[i]); 3431 p += strlen(av[i]); 3432 *p++ = ' '; 3433 } 3434 *(--p) = '\0'; 3435} 3436 3437/* 3438 * A function to fill simple commands of size 1. 3439 * Existing flags are preserved. 3440 */ 3441static void 3442fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3443{ 3444 cmd->opcode = opcode; 3445 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3446 cmd->arg1 = arg; 3447} 3448 3449/* 3450 * Fetch and add the MAC address and type, with masks. This generates one or 3451 * two microinstructions, and returns the pointer to the last one. 3452 */ 3453static ipfw_insn * 3454add_mac(ipfw_insn *cmd, char *av[], int cblen) 3455{ 3456 ipfw_insn_mac *mac; 3457 3458 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3459 errx(EX_DATAERR, "MAC dst src"); 3460 3461 cmd->opcode = O_MACADDR2; 3462 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3463 CHECK_CMDLEN; 3464 3465 mac = (ipfw_insn_mac *)cmd; 3466 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3467 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3468 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3469 return cmd; 3470} 3471 3472static ipfw_insn * 3473add_mactype(ipfw_insn *cmd, char *av, int cblen) 3474{ 3475 if (!av) 3476 errx(EX_DATAERR, "missing MAC type"); 3477 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3478 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3479 cblen); 3480 cmd->opcode = O_MAC_TYPE; 3481 return cmd; 3482 } else 3483 return NULL; 3484} 3485 3486static ipfw_insn * 3487add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3488{ 3489 struct protoent *pe; 3490 char *ep; 3491 int proto; 3492 3493 proto = strtol(av, &ep, 10); 3494 if (*ep != '\0' || proto <= 0) { 3495 if ((pe = getprotobyname(av)) == NULL) 3496 return NULL; 3497 proto = pe->p_proto; 3498 } 3499 3500 fill_cmd(cmd, O_PROTO, 0, proto); 3501 *protop = proto; 3502 return cmd; 3503} 3504 3505static ipfw_insn * 3506add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3507{ 3508 u_char proto = IPPROTO_IP; 3509 3510 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3511 ; /* do not set O_IP4 nor O_IP6 */ 3512 else if (strcmp(av, "ip4") == 0) 3513 /* explicit "just IPv4" rule */ 3514 fill_cmd(cmd, O_IP4, 0, 0); 3515 else if (strcmp(av, "ip6") == 0) { 3516 /* explicit "just IPv6" rule */ 3517 proto = IPPROTO_IPV6; 3518 fill_cmd(cmd, O_IP6, 0, 0); 3519 } else 3520 return add_proto0(cmd, av, protop); 3521 3522 *protop = proto; 3523 return cmd; 3524} 3525 3526static ipfw_insn * 3527add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3528{ 3529 u_char proto = IPPROTO_IP; 3530 3531 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3532 ; /* do not set O_IP4 nor O_IP6 */ 3533 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3534 /* explicit "just IPv4" rule */ 3535 fill_cmd(cmd, O_IP4, 0, 0); 3536 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3537 /* explicit "just IPv6" rule */ 3538 proto = IPPROTO_IPV6; 3539 fill_cmd(cmd, O_IP6, 0, 0); 3540 } else 3541 return add_proto0(cmd, av, protop); 3542 3543 *protop = proto; 3544 return cmd; 3545} 3546 3547static ipfw_insn * 3548add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3549{ 3550 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3551 if (cmd->opcode == O_IP_DST_SET) /* set */ 3552 cmd->opcode = O_IP_SRC_SET; 3553 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3554 cmd->opcode = O_IP_SRC_LOOKUP; 3555 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3556 cmd->opcode = O_IP_SRC_ME; 3557 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3558 cmd->opcode = O_IP_SRC; 3559 else /* addr/mask */ 3560 cmd->opcode = O_IP_SRC_MASK; 3561 return cmd; 3562} 3563 3564static ipfw_insn * 3565add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3566{ 3567 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3568 if (cmd->opcode == O_IP_DST_SET) /* set */ 3569 ; 3570 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3571 ; 3572 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3573 cmd->opcode = O_IP_DST_ME; 3574 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3575 cmd->opcode = O_IP_DST; 3576 else /* addr/mask */ 3577 cmd->opcode = O_IP_DST_MASK; 3578 return cmd; 3579} 3580 3581static struct _s_x f_reserved_keywords[] = { 3582 { "altq", TOK_OR }, 3583 { "//", TOK_OR }, 3584 { "diverted", TOK_OR }, 3585 { "dst-port", TOK_OR }, 3586 { "src-port", TOK_OR }, 3587 { "established", TOK_OR }, 3588 { "keep-state", TOK_OR }, 3589 { "frag", TOK_OR }, 3590 { "icmptypes", TOK_OR }, 3591 { "in", TOK_OR }, 3592 { "out", TOK_OR }, 3593 { "ip6", TOK_OR }, 3594 { "any", TOK_OR }, 3595 { "to", TOK_OR }, 3596 { "via", TOK_OR }, 3597 { "{", TOK_OR }, 3598 { NULL, 0 } /* terminator */ 3599}; 3600 3601static ipfw_insn * 3602add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3603{ 3604 3605 if (match_token(f_reserved_keywords, av) != -1) 3606 return (NULL); 3607 3608 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3609 /* XXX todo: check that we have a protocol with ports */ 3610 cmd->opcode = opcode; 3611 return cmd; 3612 } 3613 return NULL; 3614} 3615 3616static ipfw_insn * 3617add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3618{ 3619 struct in6_addr a; 3620 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3621 ipfw_insn *ret = NULL; 3622 int len; 3623 3624 /* Copy first address in set if needed */ 3625 if ((ch = strpbrk(av, "/,")) != NULL) { 3626 len = ch - av; 3627 strlcpy(buf, av, sizeof(buf)); 3628 if (len < sizeof(buf)) 3629 buf[len] = '\0'; 3630 host = buf; 3631 } else 3632 host = av; 3633 3634 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3635 inet_pton(AF_INET6, host, &a) == 1) 3636 ret = add_srcip6(cmd, av, cblen, tstate); 3637 /* XXX: should check for IPv4, not !IPv6 */ 3638 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3639 inet_pton(AF_INET6, host, &a) != 1)) 3640 ret = add_srcip(cmd, av, cblen, tstate); 3641 if (ret == NULL && strcmp(av, "any") != 0) 3642 ret = cmd; 3643 3644 return ret; 3645} 3646 3647static ipfw_insn * 3648add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3649{ 3650 struct in6_addr a; 3651 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3652 ipfw_insn *ret = NULL; 3653 int len; 3654 3655 /* Copy first address in set if needed */ 3656 if ((ch = strpbrk(av, "/,")) != NULL) { 3657 len = ch - av; 3658 strlcpy(buf, av, sizeof(buf)); 3659 if (len < sizeof(buf)) 3660 buf[len] = '\0'; 3661 host = buf; 3662 } else 3663 host = av; 3664 3665 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3666 inet_pton(AF_INET6, host, &a) == 1) 3667 ret = add_dstip6(cmd, av, cblen, tstate); 3668 /* XXX: should check for IPv4, not !IPv6 */ 3669 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3670 inet_pton(AF_INET6, host, &a) != 1)) 3671 ret = add_dstip(cmd, av, cblen, tstate); 3672 if (ret == NULL && strcmp(av, "any") != 0) 3673 ret = cmd; 3674 3675 return ret; 3676} 3677 3678/* 3679 * Parse arguments and assemble the microinstructions which make up a rule. 3680 * Rules are added into the 'rulebuf' and then copied in the correct order 3681 * into the actual rule. 3682 * 3683 * The syntax for a rule starts with the action, followed by 3684 * optional action parameters, and the various match patterns. 3685 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3686 * (generated if the rule includes a keep-state option), then the 3687 * various match patterns, log/altq actions, and the actual action. 3688 * 3689 */ 3690void 3691compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3692{ 3693 /* 3694 * rules are added into the 'rulebuf' and then copied in 3695 * the correct order into the actual rule. 3696 * Some things that need to go out of order (prob, action etc.) 3697 * go into actbuf[]. 3698 */ 3699 static uint32_t actbuf[255], cmdbuf[255]; 3700 int rblen, ablen, cblen; 3701 3702 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3703 ipfw_insn *first_cmd; /* first match pattern */ 3704 3705 struct ip_fw_rule *rule; 3706 3707 /* 3708 * various flags used to record that we entered some fields. 3709 */ 3710 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3711 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3712 size_t len; 3713 3714 int i; 3715 3716 int open_par = 0; /* open parenthesis ( */ 3717 3718 /* proto is here because it is used to fetch ports */ 3719 u_char proto = IPPROTO_IP; /* default protocol */ 3720 3721 double match_prob = 1; /* match probability, default is always match */ 3722 3723 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3724 bzero(cmdbuf, sizeof(cmdbuf)); 3725 bzero(rbuf, *rbufsize); 3726 3727 rule = (struct ip_fw_rule *)rbuf; 3728 cmd = (ipfw_insn *)cmdbuf; 3729 action = (ipfw_insn *)actbuf; 3730 3731 rblen = *rbufsize / sizeof(uint32_t); 3732 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3733 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3734 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3735 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3736 3737#define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3738#define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3739 3740 av++; 3741 3742 /* [rule N] -- Rule number optional */ 3743 if (av[0] && isdigit(**av)) { 3744 rule->rulenum = atoi(*av); 3745 av++; 3746 } 3747 3748 /* [set N] -- set number (0..RESVD_SET), optional */ 3749 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3750 int set = strtoul(av[1], NULL, 10); 3751 if (set < 0 || set > RESVD_SET) 3752 errx(EX_DATAERR, "illegal set %s", av[1]); 3753 rule->set = set; 3754 tstate->set = set; 3755 av += 2; 3756 } 3757 3758 /* [prob D] -- match probability, optional */ 3759 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3760 match_prob = strtod(av[1], NULL); 3761 3762 if (match_prob <= 0 || match_prob > 1) 3763 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3764 av += 2; 3765 } 3766 3767 /* action -- mandatory */ 3768 NEED1("missing action"); 3769 i = match_token(rule_actions, *av); 3770 av++; 3771 action->len = 1; /* default */ 3772 CHECK_ACTLEN; 3773 switch(i) { 3774 case TOK_CHECKSTATE: 3775 have_state = action; 3776 action->opcode = O_CHECK_STATE; 3777 if (*av == NULL || 3778 match_token(rule_options, *av) == TOK_COMMENT) { 3779 action->arg1 = pack_object(tstate, 3780 default_state_name, IPFW_TLV_STATE_NAME); 3781 break; 3782 } 3783 if (*av[0] == ':') { 3784 if (strcmp(*av + 1, "any") == 0) 3785 action->arg1 = 0; 3786 else if (state_check_name(*av + 1) == 0) 3787 action->arg1 = pack_object(tstate, *av + 1, 3788 IPFW_TLV_STATE_NAME); 3789 else 3790 errx(EX_DATAERR, "Invalid state name %s", 3791 *av); 3792 av++; 3793 break; 3794 } 3795 errx(EX_DATAERR, "Invalid state name %s", *av); 3796 break; 3797 3798 case TOK_ABORT: 3799 action->opcode = O_REJECT; 3800 action->arg1 = ICMP_REJECT_ABORT; 3801 break; 3802 3803 case TOK_ABORT6: 3804 action->opcode = O_UNREACH6; 3805 action->arg1 = ICMP6_UNREACH_ABORT; 3806 break; 3807 3808 case TOK_ACCEPT: 3809 action->opcode = O_ACCEPT; 3810 break; 3811 3812 case TOK_DENY: 3813 action->opcode = O_DENY; 3814 action->arg1 = 0; 3815 break; 3816 3817 case TOK_REJECT: 3818 action->opcode = O_REJECT; 3819 action->arg1 = ICMP_UNREACH_HOST; 3820 break; 3821 3822 case TOK_RESET: 3823 action->opcode = O_REJECT; 3824 action->arg1 = ICMP_REJECT_RST; 3825 break; 3826 3827 case TOK_RESET6: 3828 action->opcode = O_UNREACH6; 3829 action->arg1 = ICMP6_UNREACH_RST; 3830 break; 3831 3832 case TOK_UNREACH: 3833 action->opcode = O_REJECT; 3834 NEED1("missing reject code"); 3835 fill_reject_code(&action->arg1, *av); 3836 av++; 3837 break; 3838 3839 case TOK_UNREACH6: 3840 action->opcode = O_UNREACH6; 3841 NEED1("missing unreach code"); 3842 fill_unreach6_code(&action->arg1, *av); 3843 av++; 3844 break; 3845 3846 case TOK_COUNT: 3847 action->opcode = O_COUNT; 3848 break; 3849 3850 case TOK_NAT: 3851 action->opcode = O_NAT; 3852 action->len = F_INSN_SIZE(ipfw_insn_nat); 3853 CHECK_ACTLEN; 3854 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3855 action->arg1 = IP_FW_NAT44_GLOBAL; 3856 av++; 3857 break; 3858 } else 3859 goto chkarg; 3860 case TOK_QUEUE: 3861 action->opcode = O_QUEUE; 3862 goto chkarg; 3863 case TOK_PIPE: 3864 action->opcode = O_PIPE; 3865 goto chkarg; 3866 case TOK_SKIPTO: 3867 action->opcode = O_SKIPTO; 3868 goto chkarg; 3869 case TOK_NETGRAPH: 3870 action->opcode = O_NETGRAPH; 3871 goto chkarg; 3872 case TOK_NGTEE: 3873 action->opcode = O_NGTEE; 3874 goto chkarg; 3875 case TOK_DIVERT: 3876 action->opcode = O_DIVERT; 3877 goto chkarg; 3878 case TOK_TEE: 3879 action->opcode = O_TEE; 3880 goto chkarg; 3881 case TOK_CALL: 3882 action->opcode = O_CALLRETURN; 3883chkarg: 3884 if (!av[0]) 3885 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3886 if (isdigit(**av)) { 3887 action->arg1 = strtoul(*av, NULL, 10); 3888 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3889 errx(EX_DATAERR, "illegal argument for %s", 3890 *(av - 1)); 3891 } else if (_substrcmp(*av, "tablearg") == 0) { 3892 action->arg1 = IP_FW_TARG; 3893 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3894 struct servent *s; 3895 setservent(1); 3896 s = getservbyname(av[0], "divert"); 3897 if (s != NULL) 3898 action->arg1 = ntohs(s->s_port); 3899 else 3900 errx(EX_DATAERR, "illegal divert/tee port"); 3901 } else 3902 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3903 av++; 3904 break; 3905 3906 case TOK_FORWARD: { 3907 /* 3908 * Locate the address-port separator (':' or ','). 3909 * Could be one of the following: 3910 * hostname:port 3911 * IPv4 a.b.c.d,port 3912 * IPv4 a.b.c.d:port 3913 * IPv6 w:x:y::z,port 3914 * The ':' can only be used with hostname and IPv4 address. 3915 * XXX-BZ Should we also support [w:x:y::z]:port? 3916 */ 3917 struct sockaddr_storage result; 3918 struct addrinfo *res; 3919 char *s, *end; 3920 int family; 3921 u_short port_number; 3922 3923 NEED1("missing forward address[:port]"); 3924 3925 /* 3926 * locate the address-port separator (':' or ',') 3927 */ 3928 s = strchr(*av, ','); 3929 if (s == NULL) { 3930 /* Distinguish between IPv4:port and IPv6 cases. */ 3931 s = strchr(*av, ':'); 3932 if (s && strchr(s+1, ':')) 3933 s = NULL; /* no port */ 3934 } 3935 3936 port_number = 0; 3937 if (s != NULL) { 3938 /* Terminate host portion and set s to start of port. */ 3939 *(s++) = '\0'; 3940 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3941 if (s == end) 3942 errx(EX_DATAERR, 3943 "illegal forwarding port ``%s''", s); 3944 port_number = (u_short)i; 3945 } 3946 3947 if (_substrcmp(*av, "tablearg") == 0) { 3948 family = PF_INET; 3949 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3950 INADDR_ANY; 3951 } else { 3952 /* 3953 * Resolve the host name or address to a family and a 3954 * network representation of the address. 3955 */ 3956 if (getaddrinfo(*av, NULL, NULL, &res)) 3957 errx(EX_DATAERR, NULL); 3958 /* Just use the first host in the answer. */ 3959 family = res->ai_family; 3960 memcpy(&result, res->ai_addr, res->ai_addrlen); 3961 freeaddrinfo(res); 3962 } 3963 3964 if (family == PF_INET) { 3965 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3966 3967 action->opcode = O_FORWARD_IP; 3968 action->len = F_INSN_SIZE(ipfw_insn_sa); 3969 CHECK_ACTLEN; 3970 3971 /* 3972 * In the kernel we assume AF_INET and use only 3973 * sin_port and sin_addr. Remember to set sin_len as 3974 * the routing code seems to use it too. 3975 */ 3976 p->sa.sin_len = sizeof(struct sockaddr_in); 3977 p->sa.sin_family = AF_INET; 3978 p->sa.sin_port = port_number; 3979 p->sa.sin_addr.s_addr = 3980 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3981 } else if (family == PF_INET6) { 3982 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3983 3984 action->opcode = O_FORWARD_IP6; 3985 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3986 CHECK_ACTLEN; 3987 3988 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3989 p->sa.sin6_family = AF_INET6; 3990 p->sa.sin6_port = port_number; 3991 p->sa.sin6_flowinfo = 0; 3992 p->sa.sin6_scope_id = 3993 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 3994 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3995 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3996 } else { 3997 errx(EX_DATAERR, "Invalid address family in forward action"); 3998 } 3999 av++; 4000 break; 4001 } 4002 case TOK_COMMENT: 4003 /* pretend it is a 'count' rule followed by the comment */ 4004 action->opcode = O_COUNT; 4005 av--; /* go back... */ 4006 break; 4007 4008 case TOK_SETFIB: 4009 { 4010 int numfibs; 4011 size_t intsize = sizeof(int); 4012 4013 action->opcode = O_SETFIB; 4014 NEED1("missing fib number"); 4015 if (_substrcmp(*av, "tablearg") == 0) { 4016 action->arg1 = IP_FW_TARG; 4017 } else { 4018 action->arg1 = strtoul(*av, NULL, 10); 4019 if (sysctlbyname("net.fibs", &numfibs, &intsize, 4020 NULL, 0) == -1) 4021 errx(EX_DATAERR, "fibs not suported.\n"); 4022 if (action->arg1 >= numfibs) /* Temporary */ 4023 errx(EX_DATAERR, "fib too large.\n"); 4024 /* Add high-order bit to fib to make room for tablearg*/ 4025 action->arg1 |= 0x8000; 4026 } 4027 av++; 4028 break; 4029 } 4030 4031 case TOK_SETDSCP: 4032 { 4033 int code; 4034 4035 action->opcode = O_SETDSCP; 4036 NEED1("missing DSCP code"); 4037 if (_substrcmp(*av, "tablearg") == 0) { 4038 action->arg1 = IP_FW_TARG; 4039 } else { 4040 if (isalpha(*av[0])) { 4041 if ((code = match_token(f_ipdscp, *av)) == -1) 4042 errx(EX_DATAERR, "Unknown DSCP code"); 4043 action->arg1 = code; 4044 } else 4045 action->arg1 = strtoul(*av, NULL, 10); 4046 /* 4047 * Add high-order bit to DSCP to make room 4048 * for tablearg 4049 */ 4050 action->arg1 |= 0x8000; 4051 } 4052 av++; 4053 break; 4054 } 4055 4056 case TOK_REASS: 4057 action->opcode = O_REASS; 4058 break; 4059 4060 case TOK_RETURN: 4061 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 4062 break; 4063 4064 case TOK_TCPSETMSS: { 4065 u_long mss; 4066 uint16_t idx; 4067 4068 idx = pack_object(tstate, "tcp-setmss", IPFW_TLV_EACTION); 4069 if (idx == 0) 4070 errx(EX_DATAERR, "pack_object failed"); 4071 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4072 NEED1("Missing MSS value"); 4073 action = next_cmd(action, &ablen); 4074 action->len = 1; 4075 CHECK_ACTLEN; 4076 mss = strtoul(*av, NULL, 10); 4077 if (mss == 0 || mss > UINT16_MAX) 4078 errx(EX_USAGE, "invalid MSS value %s", *av); 4079 fill_cmd(action, O_EXTERNAL_DATA, 0, (uint16_t)mss); 4080 av++; 4081 break; 4082 } 4083 4084 default: 4085 av--; 4086 if (match_token(rule_eactions, *av) == -1) 4087 errx(EX_DATAERR, "invalid action %s\n", *av); 4088 /* 4089 * External actions support. 4090 * XXX: we support only syntax with instance name. 4091 * For known external actions (from rule_eactions list) 4092 * we can handle syntax directly. But with `eaction' 4093 * keyword we can use only `eaction <name> <instance>' 4094 * syntax. 4095 */ 4096 case TOK_EACTION: { 4097 uint16_t idx; 4098 4099 NEED1("Missing eaction name"); 4100 if (eaction_check_name(*av) != 0) 4101 errx(EX_DATAERR, "Invalid eaction name %s", *av); 4102 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 4103 if (idx == 0) 4104 errx(EX_DATAERR, "pack_object failed"); 4105 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 4106 av++; 4107 NEED1("Missing eaction instance name"); 4108 action = next_cmd(action, &ablen); 4109 action->len = 1; 4110 CHECK_ACTLEN; 4111 if (eaction_check_name(*av) != 0) 4112 errx(EX_DATAERR, "Invalid eaction instance name %s", 4113 *av); 4114 /* 4115 * External action instance object has TLV type depended 4116 * from the external action name object index. Since we 4117 * currently don't know this index, use zero as TLV type. 4118 */ 4119 idx = pack_object(tstate, *av, 0); 4120 if (idx == 0) 4121 errx(EX_DATAERR, "pack_object failed"); 4122 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 4123 av++; 4124 } 4125 } 4126 action = next_cmd(action, &ablen); 4127 4128 /* 4129 * [altq queuename] -- altq tag, optional 4130 * [log [logamount N]] -- log, optional 4131 * 4132 * If they exist, it go first in the cmdbuf, but then it is 4133 * skipped in the copy section to the end of the buffer. 4134 */ 4135 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 4136 av++; 4137 switch (i) { 4138 case TOK_LOG: 4139 { 4140 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4141 int l; 4142 4143 if (have_log) 4144 errx(EX_DATAERR, 4145 "log cannot be specified more than once"); 4146 have_log = (ipfw_insn *)c; 4147 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4148 CHECK_CMDLEN; 4149 cmd->opcode = O_LOG; 4150 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4151 av++; 4152 NEED1("logamount requires argument"); 4153 l = atoi(*av); 4154 if (l < 0) 4155 errx(EX_DATAERR, 4156 "logamount must be positive"); 4157 c->max_log = l; 4158 av++; 4159 } else { 4160 len = sizeof(c->max_log); 4161 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4162 &c->max_log, &len, NULL, 0) == -1) { 4163 if (co.test_only) { 4164 c->max_log = 0; 4165 break; 4166 } 4167 errx(1, "sysctlbyname(\"%s\")", 4168 "net.inet.ip.fw.verbose_limit"); 4169 } 4170 } 4171 } 4172 break; 4173 4174#ifndef NO_ALTQ 4175 case TOK_ALTQ: 4176 { 4177 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4178 4179 NEED1("missing altq queue name"); 4180 if (have_altq) 4181 errx(EX_DATAERR, 4182 "altq cannot be specified more than once"); 4183 have_altq = (ipfw_insn *)a; 4184 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4185 CHECK_CMDLEN; 4186 cmd->opcode = O_ALTQ; 4187 a->qid = altq_name_to_qid(*av); 4188 av++; 4189 } 4190 break; 4191#endif 4192 4193 case TOK_TAG: 4194 case TOK_UNTAG: { 4195 uint16_t tag; 4196 4197 if (have_tag) 4198 errx(EX_USAGE, "tag and untag cannot be " 4199 "specified more than once"); 4200 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4201 rule_action_params); 4202 have_tag = cmd; 4203 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4204 av++; 4205 break; 4206 } 4207 4208 default: 4209 abort(); 4210 } 4211 cmd = next_cmd(cmd, &cblen); 4212 } 4213 4214 if (have_state) { /* must be a check-state, we are done */ 4215 if (*av != NULL && 4216 match_token(rule_options, *av) == TOK_COMMENT) { 4217 /* check-state has a comment */ 4218 av++; 4219 fill_comment(cmd, av, cblen); 4220 cmd = next_cmd(cmd, &cblen); 4221 av[0] = NULL; 4222 } 4223 goto done; 4224 } 4225 4226#define OR_START(target) \ 4227 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4228 if (open_par) \ 4229 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4230 prev = NULL; \ 4231 open_par = 1; \ 4232 if ( (av[0])[1] == '\0') { \ 4233 av++; \ 4234 } else \ 4235 (*av)++; \ 4236 } \ 4237 target: \ 4238 4239 4240#define CLOSE_PAR \ 4241 if (open_par) { \ 4242 if (av[0] && ( \ 4243 strcmp(*av, ")") == 0 || \ 4244 strcmp(*av, "}") == 0)) { \ 4245 prev = NULL; \ 4246 open_par = 0; \ 4247 av++; \ 4248 } else \ 4249 errx(EX_USAGE, "missing \")\"\n"); \ 4250 } 4251 4252#define NOT_BLOCK \ 4253 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4254 if (cmd->len & F_NOT) \ 4255 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4256 cmd->len |= F_NOT; \ 4257 av++; \ 4258 } 4259 4260#define OR_BLOCK(target) \ 4261 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4262 if (prev == NULL || open_par == 0) \ 4263 errx(EX_DATAERR, "invalid OR block"); \ 4264 prev->len |= F_OR; \ 4265 av++; \ 4266 goto target; \ 4267 } \ 4268 CLOSE_PAR; 4269 4270 first_cmd = cmd; 4271 4272#if 0 4273 /* 4274 * MAC addresses, optional. 4275 * If we have this, we skip the part "proto from src to dst" 4276 * and jump straight to the option parsing. 4277 */ 4278 NOT_BLOCK; 4279 NEED1("missing protocol"); 4280 if (_substrcmp(*av, "MAC") == 0 || 4281 _substrcmp(*av, "mac") == 0) { 4282 av++; /* the "MAC" keyword */ 4283 add_mac(cmd, av); /* exits in case of errors */ 4284 cmd = next_cmd(cmd); 4285 av += 2; /* dst-mac and src-mac */ 4286 NOT_BLOCK; 4287 NEED1("missing mac type"); 4288 if (add_mactype(cmd, av[0])) 4289 cmd = next_cmd(cmd); 4290 av++; /* any or mac-type */ 4291 goto read_options; 4292 } 4293#endif 4294 4295 /* 4296 * protocol, mandatory 4297 */ 4298 OR_START(get_proto); 4299 NOT_BLOCK; 4300 NEED1("missing protocol"); 4301 if (add_proto_compat(cmd, *av, &proto)) { 4302 av++; 4303 if (F_LEN(cmd) != 0) { 4304 prev = cmd; 4305 cmd = next_cmd(cmd, &cblen); 4306 } 4307 } else if (first_cmd != cmd) { 4308 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4309 } else 4310 goto read_options; 4311 OR_BLOCK(get_proto); 4312 4313 /* 4314 * "from", mandatory 4315 */ 4316 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4317 errx(EX_USAGE, "missing ``from''"); 4318 av++; 4319 4320 /* 4321 * source IP, mandatory 4322 */ 4323 OR_START(source_ip); 4324 NOT_BLOCK; /* optional "not" */ 4325 NEED1("missing source address"); 4326 if (add_src(cmd, *av, proto, cblen, tstate)) { 4327 av++; 4328 if (F_LEN(cmd) != 0) { /* ! any */ 4329 prev = cmd; 4330 cmd = next_cmd(cmd, &cblen); 4331 } 4332 } else 4333 errx(EX_USAGE, "bad source address %s", *av); 4334 OR_BLOCK(source_ip); 4335 4336 /* 4337 * source ports, optional 4338 */ 4339 NOT_BLOCK; /* optional "not" */ 4340 if ( av[0] != NULL ) { 4341 if (_substrcmp(*av, "any") == 0 || 4342 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4343 av++; 4344 if (F_LEN(cmd) != 0) 4345 cmd = next_cmd(cmd, &cblen); 4346 } 4347 } 4348 4349 /* 4350 * "to", mandatory 4351 */ 4352 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4353 errx(EX_USAGE, "missing ``to''"); 4354 av++; 4355 4356 /* 4357 * destination, mandatory 4358 */ 4359 OR_START(dest_ip); 4360 NOT_BLOCK; /* optional "not" */ 4361 NEED1("missing dst address"); 4362 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4363 av++; 4364 if (F_LEN(cmd) != 0) { /* ! any */ 4365 prev = cmd; 4366 cmd = next_cmd(cmd, &cblen); 4367 } 4368 } else 4369 errx( EX_USAGE, "bad destination address %s", *av); 4370 OR_BLOCK(dest_ip); 4371 4372 /* 4373 * dest. ports, optional 4374 */ 4375 NOT_BLOCK; /* optional "not" */ 4376 if (av[0]) { 4377 if (_substrcmp(*av, "any") == 0 || 4378 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4379 av++; 4380 if (F_LEN(cmd) != 0) 4381 cmd = next_cmd(cmd, &cblen); 4382 } 4383 } 4384 4385read_options: 4386 prev = NULL; 4387 while ( av[0] != NULL ) { 4388 char *s; 4389 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4390 4391 s = *av; 4392 cmd32 = (ipfw_insn_u32 *)cmd; 4393 4394 if (*s == '!') { /* alternate syntax for NOT */ 4395 if (cmd->len & F_NOT) 4396 errx(EX_USAGE, "double \"not\" not allowed\n"); 4397 cmd->len = F_NOT; 4398 s++; 4399 } 4400 i = match_token(rule_options, s); 4401 av++; 4402 switch(i) { 4403 case TOK_NOT: 4404 if (cmd->len & F_NOT) 4405 errx(EX_USAGE, "double \"not\" not allowed\n"); 4406 cmd->len = F_NOT; 4407 break; 4408 4409 case TOK_OR: 4410 if (open_par == 0 || prev == NULL) 4411 errx(EX_USAGE, "invalid \"or\" block\n"); 4412 prev->len |= F_OR; 4413 break; 4414 4415 case TOK_STARTBRACE: 4416 if (open_par) 4417 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4418 open_par = 1; 4419 break; 4420 4421 case TOK_ENDBRACE: 4422 if (!open_par) 4423 errx(EX_USAGE, "+missing \")\"\n"); 4424 open_par = 0; 4425 prev = NULL; 4426 break; 4427 4428 case TOK_IN: 4429 fill_cmd(cmd, O_IN, 0, 0); 4430 break; 4431 4432 case TOK_OUT: 4433 cmd->len ^= F_NOT; /* toggle F_NOT */ 4434 fill_cmd(cmd, O_IN, 0, 0); 4435 break; 4436 4437 case TOK_DIVERTED: 4438 fill_cmd(cmd, O_DIVERTED, 0, 3); 4439 break; 4440 4441 case TOK_DIVERTEDLOOPBACK: 4442 fill_cmd(cmd, O_DIVERTED, 0, 1); 4443 break; 4444 4445 case TOK_DIVERTEDOUTPUT: 4446 fill_cmd(cmd, O_DIVERTED, 0, 2); 4447 break; 4448 4449 case TOK_FRAG: 4450 fill_cmd(cmd, O_FRAG, 0, 0); 4451 break; 4452 4453 case TOK_LAYER2: 4454 fill_cmd(cmd, O_LAYER2, 0, 0); 4455 break; 4456 4457 case TOK_XMIT: 4458 case TOK_RECV: 4459 case TOK_VIA: 4460 NEED1("recv, xmit, via require interface name" 4461 " or address"); 4462 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4463 av++; 4464 if (F_LEN(cmd) == 0) /* not a valid address */ 4465 break; 4466 if (i == TOK_XMIT) 4467 cmd->opcode = O_XMIT; 4468 else if (i == TOK_RECV) 4469 cmd->opcode = O_RECV; 4470 else if (i == TOK_VIA) 4471 cmd->opcode = O_VIA; 4472 break; 4473 4474 case TOK_ICMPTYPES: 4475 NEED1("icmptypes requires list of types"); 4476 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4477 av++; 4478 break; 4479 4480 case TOK_ICMP6TYPES: 4481 NEED1("icmptypes requires list of types"); 4482 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4483 av++; 4484 break; 4485 4486 case TOK_IPTTL: 4487 NEED1("ipttl requires TTL"); 4488 if (strpbrk(*av, "-,")) { 4489 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4490 errx(EX_DATAERR, "invalid ipttl %s", *av); 4491 } else 4492 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4493 av++; 4494 break; 4495 4496 case TOK_IPID: 4497 NEED1("ipid requires id"); 4498 if (strpbrk(*av, "-,")) { 4499 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4500 errx(EX_DATAERR, "invalid ipid %s", *av); 4501 } else 4502 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4503 av++; 4504 break; 4505 4506 case TOK_IPLEN: 4507 NEED1("iplen requires length"); 4508 if (strpbrk(*av, "-,")) { 4509 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4510 errx(EX_DATAERR, "invalid ip len %s", *av); 4511 } else 4512 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4513 av++; 4514 break; 4515 4516 case TOK_IPVER: 4517 NEED1("ipver requires version"); 4518 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4519 av++; 4520 break; 4521 4522 case TOK_IPPRECEDENCE: 4523 NEED1("ipprecedence requires value"); 4524 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4525 (strtoul(*av, NULL, 0) & 7) << 5); 4526 av++; 4527 break; 4528 4529 case TOK_DSCP: 4530 NEED1("missing DSCP code"); 4531 fill_dscp(cmd, *av, cblen); 4532 av++; 4533 break; 4534 4535 case TOK_IPOPTS: 4536 NEED1("missing argument for ipoptions"); 4537 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4538 av++; 4539 break; 4540 4541 case TOK_IPTOS: 4542 NEED1("missing argument for iptos"); 4543 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4544 av++; 4545 break; 4546 4547 case TOK_UID: 4548 NEED1("uid requires argument"); 4549 { 4550 char *end; 4551 uid_t uid; 4552 struct passwd *pwd; 4553 4554 cmd->opcode = O_UID; 4555 uid = strtoul(*av, &end, 0); 4556 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4557 if (pwd == NULL) 4558 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4559 cmd32->d[0] = pwd->pw_uid; 4560 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4561 av++; 4562 } 4563 break; 4564 4565 case TOK_GID: 4566 NEED1("gid requires argument"); 4567 { 4568 char *end; 4569 gid_t gid; 4570 struct group *grp; 4571 4572 cmd->opcode = O_GID; 4573 gid = strtoul(*av, &end, 0); 4574 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4575 if (grp == NULL) 4576 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4577 cmd32->d[0] = grp->gr_gid; 4578 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4579 av++; 4580 } 4581 break; 4582 4583 case TOK_JAIL: 4584 NEED1("jail requires argument"); 4585 { 4586 char *end; 4587 int jid; 4588 4589 cmd->opcode = O_JAIL; 4590 jid = (int)strtol(*av, &end, 0); 4591 if (jid < 0 || *end != '\0') 4592 errx(EX_DATAERR, "jail requires prison ID"); 4593 cmd32->d[0] = (uint32_t)jid; 4594 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4595 av++; 4596 } 4597 break; 4598 4599 case TOK_ESTAB: 4600 fill_cmd(cmd, O_ESTAB, 0, 0); 4601 break; 4602 4603 case TOK_SETUP: 4604 fill_cmd(cmd, O_TCPFLAGS, 0, 4605 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4606 break; 4607 4608 case TOK_TCPDATALEN: 4609 NEED1("tcpdatalen requires length"); 4610 if (strpbrk(*av, "-,")) { 4611 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4612 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4613 } else 4614 fill_cmd(cmd, O_TCPDATALEN, 0, 4615 strtoul(*av, NULL, 0)); 4616 av++; 4617 break; 4618 4619 case TOK_TCPOPTS: 4620 NEED1("missing argument for tcpoptions"); 4621 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4622 av++; 4623 break; 4624 4625 case TOK_TCPSEQ: 4626 case TOK_TCPACK: 4627 NEED1("tcpseq/tcpack requires argument"); 4628 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4629 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4630 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4631 av++; 4632 break; 4633 4634 case TOK_TCPWIN: 4635 NEED1("tcpwin requires length"); 4636 if (strpbrk(*av, "-,")) { 4637 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4638 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4639 } else 4640 fill_cmd(cmd, O_TCPWIN, 0, 4641 strtoul(*av, NULL, 0)); 4642 av++; 4643 break; 4644 4645 case TOK_TCPFLAGS: 4646 NEED1("missing argument for tcpflags"); 4647 cmd->opcode = O_TCPFLAGS; 4648 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4649 av++; 4650 break; 4651 4652 case TOK_KEEPSTATE: { 4653 uint16_t uidx; 4654 4655 if (open_par) 4656 errx(EX_USAGE, "keep-state cannot be part " 4657 "of an or block"); 4658 if (have_state) 4659 errx(EX_USAGE, "only one of keep-state " 4660 "and limit is allowed"); 4661 if (*av != NULL && *av[0] == ':') { 4662 if (state_check_name(*av + 1) != 0) 4663 errx(EX_DATAERR, 4664 "Invalid state name %s", *av); 4665 uidx = pack_object(tstate, *av + 1, 4666 IPFW_TLV_STATE_NAME); 4667 av++; 4668 } else 4669 uidx = pack_object(tstate, default_state_name, 4670 IPFW_TLV_STATE_NAME); 4671 have_state = cmd; 4672 fill_cmd(cmd, O_KEEP_STATE, 0, uidx); 4673 break; 4674 } 4675 4676 case TOK_LIMIT: { 4677 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4678 int val; 4679 4680 if (open_par) 4681 errx(EX_USAGE, 4682 "limit cannot be part of an or block"); 4683 if (have_state) 4684 errx(EX_USAGE, "only one of keep-state and " 4685 "limit is allowed"); 4686 have_state = cmd; 4687 4688 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4689 CHECK_CMDLEN; 4690 cmd->opcode = O_LIMIT; 4691 c->limit_mask = c->conn_limit = 0; 4692 4693 while ( av[0] != NULL ) { 4694 if ((val = match_token(limit_masks, *av)) <= 0) 4695 break; 4696 c->limit_mask |= val; 4697 av++; 4698 } 4699 4700 if (c->limit_mask == 0) 4701 errx(EX_USAGE, "limit: missing limit mask"); 4702 4703 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4704 TOK_LIMIT, rule_options); 4705 av++; 4706 4707 if (*av != NULL && *av[0] == ':') { 4708 if (state_check_name(*av + 1) != 0) 4709 errx(EX_DATAERR, 4710 "Invalid state name %s", *av); 4711 cmd->arg1 = pack_object(tstate, *av + 1, 4712 IPFW_TLV_STATE_NAME); 4713 av++; 4714 } else 4715 cmd->arg1 = pack_object(tstate, 4716 default_state_name, IPFW_TLV_STATE_NAME); 4717 break; 4718 } 4719 4720 case TOK_PROTO: 4721 NEED1("missing protocol"); 4722 if (add_proto(cmd, *av, &proto)) { 4723 av++; 4724 } else 4725 errx(EX_DATAERR, "invalid protocol ``%s''", 4726 *av); 4727 break; 4728 4729 case TOK_SRCIP: 4730 NEED1("missing source IP"); 4731 if (add_srcip(cmd, *av, cblen, tstate)) { 4732 av++; 4733 } 4734 break; 4735 4736 case TOK_DSTIP: 4737 NEED1("missing destination IP"); 4738 if (add_dstip(cmd, *av, cblen, tstate)) { 4739 av++; 4740 } 4741 break; 4742 4743 case TOK_SRCIP6: 4744 NEED1("missing source IP6"); 4745 if (add_srcip6(cmd, *av, cblen, tstate)) { 4746 av++; 4747 } 4748 break; 4749 4750 case TOK_DSTIP6: 4751 NEED1("missing destination IP6"); 4752 if (add_dstip6(cmd, *av, cblen, tstate)) { 4753 av++; 4754 } 4755 break; 4756 4757 case TOK_SRCPORT: 4758 NEED1("missing source port"); 4759 if (_substrcmp(*av, "any") == 0 || 4760 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4761 av++; 4762 } else 4763 errx(EX_DATAERR, "invalid source port %s", *av); 4764 break; 4765 4766 case TOK_DSTPORT: 4767 NEED1("missing destination port"); 4768 if (_substrcmp(*av, "any") == 0 || 4769 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4770 av++; 4771 } else 4772 errx(EX_DATAERR, "invalid destination port %s", 4773 *av); 4774 break; 4775 4776 case TOK_MAC: 4777 if (add_mac(cmd, av, cblen)) 4778 av += 2; 4779 break; 4780 4781 case TOK_MACTYPE: 4782 NEED1("missing mac type"); 4783 if (!add_mactype(cmd, *av, cblen)) 4784 errx(EX_DATAERR, "invalid mac type %s", *av); 4785 av++; 4786 break; 4787 4788 case TOK_VERREVPATH: 4789 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4790 break; 4791 4792 case TOK_VERSRCREACH: 4793 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4794 break; 4795 4796 case TOK_ANTISPOOF: 4797 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4798 break; 4799 4800 case TOK_IPSEC: 4801 fill_cmd(cmd, O_IPSEC, 0, 0); 4802 break; 4803 4804 case TOK_IPV6: 4805 fill_cmd(cmd, O_IP6, 0, 0); 4806 break; 4807 4808 case TOK_IPV4: 4809 fill_cmd(cmd, O_IP4, 0, 0); 4810 break; 4811 4812 case TOK_EXT6HDR: 4813 fill_ext6hdr( cmd, *av ); 4814 av++; 4815 break; 4816 4817 case TOK_FLOWID: 4818 if (proto != IPPROTO_IPV6 ) 4819 errx( EX_USAGE, "flow-id filter is active " 4820 "only for ipv6 protocol\n"); 4821 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4822 av++; 4823 break; 4824 4825 case TOK_COMMENT: 4826 fill_comment(cmd, av, cblen); 4827 av[0]=NULL; 4828 break; 4829 4830 case TOK_TAGGED: 4831 if (av[0] && strpbrk(*av, "-,")) { 4832 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4833 errx(EX_DATAERR, "tagged: invalid tag" 4834 " list: %s", *av); 4835 } 4836 else { 4837 uint16_t tag; 4838 4839 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4840 TOK_TAGGED, rule_options); 4841 fill_cmd(cmd, O_TAGGED, 0, tag); 4842 } 4843 av++; 4844 break; 4845 4846 case TOK_FIB: 4847 NEED1("fib requires fib number"); 4848 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4849 av++; 4850 break; 4851 case TOK_SOCKARG: 4852 fill_cmd(cmd, O_SOCKARG, 0, 0); 4853 break; 4854 4855 case TOK_LOOKUP: { 4856 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4857 int j; 4858 4859 if (!av[0] || !av[1]) 4860 errx(EX_USAGE, "format: lookup argument tablenum"); 4861 cmd->opcode = O_IP_DST_LOOKUP; 4862 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4863 i = match_token(rule_options, *av); 4864 for (j = 0; lookup_key[j] >= 0 ; j++) { 4865 if (i == lookup_key[j]) 4866 break; 4867 } 4868 if (lookup_key[j] <= 0) 4869 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4870 __PAST_END(c->d, 1) = j; // i converted to option 4871 av++; 4872 4873 if ((j = pack_table(tstate, *av)) == 0) 4874 errx(EX_DATAERR, "Invalid table name: %s", *av); 4875 4876 cmd->arg1 = j; 4877 av++; 4878 } 4879 break; 4880 case TOK_FLOW: 4881 NEED1("missing table name"); 4882 if (strncmp(*av, "table(", 6) != 0) 4883 errx(EX_DATAERR, 4884 "enclose table name into \"table()\""); 4885 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4886 av++; 4887 break; 4888 4889 default: 4890 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4891 } 4892 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4893 prev = cmd; 4894 cmd = next_cmd(cmd, &cblen); 4895 } 4896 } 4897 4898done: 4899 /* 4900 * Now copy stuff into the rule. 4901 * If we have a keep-state option, the first instruction 4902 * must be a PROBE_STATE (which is generated here). 4903 * If we have a LOG option, it was stored as the first command, 4904 * and now must be moved to the top of the action part. 4905 */ 4906 dst = (ipfw_insn *)rule->cmd; 4907 4908 /* 4909 * First thing to write into the command stream is the match probability. 4910 */ 4911 if (match_prob != 1) { /* 1 means always match */ 4912 dst->opcode = O_PROB; 4913 dst->len = 2; 4914 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4915 dst += dst->len; 4916 } 4917 4918 /* 4919 * generate O_PROBE_STATE if necessary 4920 */ 4921 if (have_state && have_state->opcode != O_CHECK_STATE) { 4922 fill_cmd(dst, O_PROBE_STATE, 0, have_state->arg1); 4923 dst = next_cmd(dst, &rblen); 4924 } 4925 4926 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4927 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4928 i = F_LEN(src); 4929 CHECK_RBUFLEN(i); 4930 4931 switch (src->opcode) { 4932 case O_LOG: 4933 case O_KEEP_STATE: 4934 case O_LIMIT: 4935 case O_ALTQ: 4936 case O_TAG: 4937 break; 4938 default: 4939 bcopy(src, dst, i * sizeof(uint32_t)); 4940 dst += i; 4941 } 4942 } 4943 4944 /* 4945 * put back the have_state command as last opcode 4946 */ 4947 if (have_state && have_state->opcode != O_CHECK_STATE) { 4948 i = F_LEN(have_state); 4949 CHECK_RBUFLEN(i); 4950 bcopy(have_state, dst, i * sizeof(uint32_t)); 4951 dst += i; 4952 } 4953 /* 4954 * start action section 4955 */ 4956 rule->act_ofs = dst - rule->cmd; 4957 4958 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4959 if (have_log) { 4960 i = F_LEN(have_log); 4961 CHECK_RBUFLEN(i); 4962 bcopy(have_log, dst, i * sizeof(uint32_t)); 4963 dst += i; 4964 } 4965 if (have_altq) { 4966 i = F_LEN(have_altq); 4967 CHECK_RBUFLEN(i); 4968 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4969 dst += i; 4970 } 4971 if (have_tag) { 4972 i = F_LEN(have_tag); 4973 CHECK_RBUFLEN(i); 4974 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4975 dst += i; 4976 } 4977 4978 /* 4979 * copy all other actions 4980 */ 4981 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4982 i = F_LEN(src); 4983 CHECK_RBUFLEN(i); 4984 bcopy(src, dst, i * sizeof(uint32_t)); 4985 dst += i; 4986 } 4987 4988 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4989 *rbufsize = (char *)dst - (char *)rule; 4990} 4991 4992static int 4993compare_ntlv(const void *_a, const void *_b) 4994{ 4995 ipfw_obj_ntlv *a, *b; 4996 4997 a = (ipfw_obj_ntlv *)_a; 4998 b = (ipfw_obj_ntlv *)_b; 4999 5000 if (a->set < b->set) 5001 return (-1); 5002 else if (a->set > b->set) 5003 return (1); 5004 5005 if (a->idx < b->idx) 5006 return (-1); 5007 else if (a->idx > b->idx) 5008 return (1); 5009 5010 if (a->head.type < b->head.type) 5011 return (-1); 5012 else if (a->head.type > b->head.type) 5013 return (1); 5014 5015 return (0); 5016} 5017 5018/* 5019 * Provide kernel with sorted list of referenced objects 5020 */ 5021static void 5022object_sort_ctlv(ipfw_obj_ctlv *ctlv) 5023{ 5024 5025 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 5026} 5027 5028struct object_kt { 5029 uint16_t uidx; 5030 uint16_t type; 5031}; 5032static int 5033compare_object_kntlv(const void *k, const void *v) 5034{ 5035 ipfw_obj_ntlv *ntlv; 5036 struct object_kt key; 5037 5038 key = *((struct object_kt *)k); 5039 ntlv = (ipfw_obj_ntlv *)v; 5040 5041 if (key.uidx < ntlv->idx) 5042 return (-1); 5043 else if (key.uidx > ntlv->idx) 5044 return (1); 5045 5046 if (key.type < ntlv->head.type) 5047 return (-1); 5048 else if (key.type > ntlv->head.type) 5049 return (1); 5050 5051 return (0); 5052} 5053 5054/* 5055 * Finds object name in @ctlv by @idx and @type. 5056 * Uses the following facts: 5057 * 1) All TLVs are the same size 5058 * 2) Kernel implementation provides already sorted list. 5059 * 5060 * Returns table name or NULL. 5061 */ 5062static char * 5063object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 5064{ 5065 ipfw_obj_ntlv *ntlv; 5066 struct object_kt key; 5067 5068 key.uidx = idx; 5069 key.type = type; 5070 5071 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 5072 compare_object_kntlv); 5073 5074 if (ntlv != NULL) 5075 return (ntlv->name); 5076 5077 return (NULL); 5078} 5079 5080static char * 5081table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 5082{ 5083 5084 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 5085} 5086 5087/* 5088 * Adds one or more rules to ipfw chain. 5089 * Data layout: 5090 * Request: 5091 * [ 5092 * ip_fw3_opheader 5093 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 5094 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 5095 * ] 5096 * Reply: 5097 * [ 5098 * ip_fw3_opheader 5099 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 5100 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 5101 * ] 5102 * 5103 * Rules in reply are modified to store their actual ruleset number. 5104 * 5105 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 5106 * according to their idx field and there has to be no duplicates. 5107 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 5108 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 5109 */ 5110void 5111ipfw_add(char *av[]) 5112{ 5113 uint32_t rulebuf[1024]; 5114 int rbufsize, default_off, tlen, rlen; 5115 size_t sz; 5116 struct tidx ts; 5117 struct ip_fw_rule *rule; 5118 caddr_t tbuf; 5119 ip_fw3_opheader *op3; 5120 ipfw_obj_ctlv *ctlv, *tstate; 5121 5122 rbufsize = sizeof(rulebuf); 5123 memset(rulebuf, 0, rbufsize); 5124 memset(&ts, 0, sizeof(ts)); 5125 5126 /* Optimize case with no tables */ 5127 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 5128 op3 = (ip_fw3_opheader *)rulebuf; 5129 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5130 rule = (struct ip_fw_rule *)(ctlv + 1); 5131 rbufsize -= default_off; 5132 5133 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 5134 /* Align rule size to u64 boundary */ 5135 rlen = roundup2(rbufsize, sizeof(uint64_t)); 5136 5137 tbuf = NULL; 5138 sz = 0; 5139 tstate = NULL; 5140 if (ts.count != 0) { 5141 /* Some tables. We have to alloc more data */ 5142 tlen = ts.count * sizeof(ipfw_obj_ntlv); 5143 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 5144 5145 if ((tbuf = calloc(1, sz)) == NULL) 5146 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 5147 op3 = (ip_fw3_opheader *)tbuf; 5148 /* Tables first */ 5149 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 5150 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 5151 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 5152 ctlv->count = ts.count; 5153 ctlv->objsize = sizeof(ipfw_obj_ntlv); 5154 memcpy(ctlv + 1, ts.idx, tlen); 5155 object_sort_ctlv(ctlv); 5156 tstate = ctlv; 5157 /* Rule next */ 5158 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 5159 ctlv->head.type = IPFW_TLV_RULE_LIST; 5160 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5161 ctlv->count = 1; 5162 memcpy(ctlv + 1, rule, rbufsize); 5163 } else { 5164 /* Simply add header */ 5165 sz = rlen + default_off; 5166 memset(ctlv, 0, sizeof(*ctlv)); 5167 ctlv->head.type = IPFW_TLV_RULE_LIST; 5168 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5169 ctlv->count = 1; 5170 } 5171 5172 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5173 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5174 5175 if (!co.do_quiet) { 5176 struct format_opts sfo; 5177 struct buf_pr bp; 5178 memset(&sfo, 0, sizeof(sfo)); 5179 sfo.tstate = tstate; 5180 sfo.set_mask = (uint32_t)(-1); 5181 bp_alloc(&bp, 4096); 5182 show_static_rule(&co, &sfo, &bp, rule, NULL); 5183 printf("%s", bp.buf); 5184 bp_free(&bp); 5185 } 5186 5187 if (tbuf != NULL) 5188 free(tbuf); 5189 5190 if (ts.idx != NULL) 5191 free(ts.idx); 5192} 5193 5194/* 5195 * clear the counters or the log counters. 5196 * optname has the following values: 5197 * 0 (zero both counters and logging) 5198 * 1 (zero logging only) 5199 */ 5200void 5201ipfw_zero(int ac, char *av[], int optname) 5202{ 5203 ipfw_range_tlv rt; 5204 char const *errstr; 5205 char const *name = optname ? "RESETLOG" : "ZERO"; 5206 uint32_t arg; 5207 int failed = EX_OK; 5208 5209 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5210 av++; ac--; 5211 5212 if (ac == 0) { 5213 /* clear all entries */ 5214 memset(&rt, 0, sizeof(rt)); 5215 rt.flags = IPFW_RCFLAG_ALL; 5216 if (do_range_cmd(optname, &rt) < 0) 5217 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5218 if (!co.do_quiet) 5219 printf("%s.\n", optname == IP_FW_XZERO ? 5220 "Accounting cleared":"Logging counts reset"); 5221 5222 return; 5223 } 5224 5225 while (ac) { 5226 /* Rule number */ 5227 if (isdigit(**av)) { 5228 arg = strtonum(*av, 0, 0xffff, &errstr); 5229 if (errstr) 5230 errx(EX_DATAERR, 5231 "invalid rule number %s\n", *av); 5232 memset(&rt, 0, sizeof(rt)); 5233 rt.start_rule = arg; 5234 rt.end_rule = arg; 5235 rt.flags |= IPFW_RCFLAG_RANGE; 5236 if (co.use_set != 0) { 5237 rt.set = co.use_set - 1; 5238 rt.flags |= IPFW_RCFLAG_SET; 5239 } 5240 if (do_range_cmd(optname, &rt) != 0) { 5241 warn("rule %u: setsockopt(IP_FW_X%s)", 5242 arg, name); 5243 failed = EX_UNAVAILABLE; 5244 } else if (rt.new_set == 0) { 5245 printf("Entry %d not found\n", arg); 5246 failed = EX_UNAVAILABLE; 5247 } else if (!co.do_quiet) 5248 printf("Entry %d %s.\n", arg, 5249 optname == IP_FW_XZERO ? 5250 "cleared" : "logging count reset"); 5251 } else { 5252 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5253 } 5254 av++; ac--; 5255 } 5256 if (failed != EX_OK) 5257 exit(failed); 5258} 5259 5260void 5261ipfw_flush(int force) 5262{ 5263 ipfw_range_tlv rt; 5264 5265 if (!force && !co.do_quiet) { /* need to ask user */ 5266 int c; 5267 5268 printf("Are you sure? [yn] "); 5269 fflush(stdout); 5270 do { 5271 c = toupper(getc(stdin)); 5272 while (c != '\n' && getc(stdin) != '\n') 5273 if (feof(stdin)) 5274 return; /* and do not flush */ 5275 } while (c != 'Y' && c != 'N'); 5276 printf("\n"); 5277 if (c == 'N') /* user said no */ 5278 return; 5279 } 5280 if (co.do_pipe) { 5281 dummynet_flush(); 5282 return; 5283 } 5284 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5285 memset(&rt, 0, sizeof(rt)); 5286 if (co.use_set != 0) { 5287 rt.set = co.use_set - 1; 5288 rt.flags = IPFW_RCFLAG_SET; 5289 } else 5290 rt.flags = IPFW_RCFLAG_ALL; 5291 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5292 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5293 if (!co.do_quiet) 5294 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5295} 5296 5297static struct _s_x intcmds[] = { 5298 { "talist", TOK_TALIST }, 5299 { "iflist", TOK_IFLIST }, 5300 { "olist", TOK_OLIST }, 5301 { "vlist", TOK_VLIST }, 5302 { NULL, 0 } 5303}; 5304 5305static struct _s_x otypes[] = { 5306 { "EACTION", IPFW_TLV_EACTION }, 5307 { "DYNSTATE", IPFW_TLV_STATE_NAME }, 5308 { NULL, 0 } 5309}; 5310 5311static const char* 5312lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5313{ 5314 const char *name; 5315 int i; 5316 5317 name = NULL; 5318 for (i = 0; i < cnt; i++) { 5319 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5320 continue; 5321 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5322 continue; 5323 name = ntlv[i].name; 5324 break; 5325 } 5326 return (name); 5327} 5328 5329static void 5330ipfw_list_objects(int ac, char *av[]) 5331{ 5332 ipfw_obj_lheader req, *olh; 5333 ipfw_obj_ntlv *ntlv; 5334 const char *name; 5335 size_t sz; 5336 int i; 5337 5338 memset(&req, 0, sizeof(req)); 5339 sz = sizeof(req); 5340 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5341 if (errno != ENOMEM) 5342 return; 5343 5344 sz = req.size; 5345 if ((olh = calloc(1, sz)) == NULL) 5346 return; 5347 5348 olh->size = sz; 5349 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5350 free(olh); 5351 return; 5352 } 5353 5354 if (olh->count > 0) 5355 printf("Objects list:\n"); 5356 else 5357 printf("There are no objects\n"); 5358 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5359 for (i = 0; i < olh->count; i++) { 5360 name = match_value(otypes, ntlv->head.type); 5361 if (name == NULL) 5362 name = lookup_eaction_name( 5363 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5364 ntlv->head.type); 5365 if (name == NULL) 5366 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5367 ntlv->idx, ntlv->head.type, ntlv->name); 5368 else 5369 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5370 ntlv->idx, name, ntlv->name); 5371 ntlv++; 5372 } 5373 free(olh); 5374} 5375 5376void 5377ipfw_internal_handler(int ac, char *av[]) 5378{ 5379 int tcmd; 5380 5381 ac--; av++; 5382 NEED1("internal cmd required"); 5383 5384 if ((tcmd = match_token(intcmds, *av)) == -1) 5385 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5386 5387 switch (tcmd) { 5388 case TOK_IFLIST: 5389 ipfw_list_tifaces(); 5390 break; 5391 case TOK_TALIST: 5392 ipfw_list_ta(ac, av); 5393 break; 5394 case TOK_OLIST: 5395 ipfw_list_objects(ac, av); 5396 break; 5397 case TOK_VLIST: 5398 ipfw_list_values(ac, av); 5399 break; 5400 } 5401} 5402 5403static int 5404ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5405{ 5406 ipfw_obj_lheader req, *olh; 5407 size_t sz; 5408 5409 memset(&req, 0, sizeof(req)); 5410 sz = sizeof(req); 5411 5412 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5413 if (errno != ENOMEM) 5414 return (errno); 5415 } 5416 5417 sz = req.size; 5418 if ((olh = calloc(1, sz)) == NULL) 5419 return (ENOMEM); 5420 5421 olh->size = sz; 5422 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5423 free(olh); 5424 return (errno); 5425 } 5426 5427 *polh = olh; 5428 return (0); 5429} 5430 5431static int 5432ifinfo_cmp(const void *a, const void *b) 5433{ 5434 ipfw_iface_info *ia, *ib; 5435 5436 ia = (ipfw_iface_info *)a; 5437 ib = (ipfw_iface_info *)b; 5438 5439 return (stringnum_cmp(ia->ifname, ib->ifname)); 5440} 5441 5442/* 5443 * Retrieves table list from kernel, 5444 * optionally sorts it and calls requested function for each table. 5445 * Returns 0 on success. 5446 */ 5447static void 5448ipfw_list_tifaces() 5449{ 5450 ipfw_obj_lheader *olh; 5451 ipfw_iface_info *info; 5452 int i, error; 5453 5454 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5455 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5456 5457 5458 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5459 5460 info = (ipfw_iface_info *)(olh + 1); 5461 for (i = 0; i < olh->count; i++) { 5462 if (info->flags & IPFW_IFFLAG_RESOLVED) 5463 printf("%s ifindex: %d refcount: %u changes: %u\n", 5464 info->ifname, info->ifindex, info->refcnt, 5465 info->gencnt); 5466 else 5467 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5468 info->ifname, info->refcnt, info->gencnt); 5469 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5470 } 5471 5472 free(olh); 5473} 5474 5475 5476 5477 5478