ipfw2.c revision 223080
1214501Srpaulo/* 2214501Srpaulo * Copyright (c) 2002-2003 Luigi Rizzo 3281806Srpaulo * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4214501Srpaulo * Copyright (c) 1994 Ugen J.S.Antsilevich 5252726Srpaulo * 6252726Srpaulo * Idea and grammar partially left from: 7214501Srpaulo * Copyright (c) 1993 Daniel Boulet 8214501Srpaulo * 9214501Srpaulo * Redistribution and use in source forms, with and without modification, 10214501Srpaulo * are permitted provided that this entire comment appears intact. 11214501Srpaulo * 12281806Srpaulo * Redistribution in binary form may occur without any restrictions. 13214501Srpaulo * Obviously, it would be nice if you gave credit where credit is due 14214501Srpaulo * but requiring it would be too onerous. 15214501Srpaulo * 16214501Srpaulo * This software is provided ``AS IS'' without any warranties of any kind. 17281806Srpaulo * 18346981Scy * NEW command line interface for IP firewall facility 19252726Srpaulo * 20252726Srpaulo * $FreeBSD: head/sbin/ipfw/ipfw2.c 223080 2011-06-14 13:35:24Z ae $ 21252726Srpaulo */ 22289549Srpaulo 23252726Srpaulo#include <sys/types.h> 24214501Srpaulo#include <sys/socket.h> 25214501Srpaulo#include <sys/sockio.h> 26337817Scy#include <sys/sysctl.h> 27214501Srpaulo 28214501Srpaulo#include "ipfw2.h" 29214501Srpaulo 30214501Srpaulo#include <ctype.h> 31214501Srpaulo#include <err.h> 32214501Srpaulo#include <errno.h> 33252726Srpaulo#include <grp.h> 34214501Srpaulo#include <netdb.h> 35346981Scy#include <pwd.h> 36252726Srpaulo#include <stdio.h> 37281806Srpaulo#include <stdlib.h> 38281806Srpaulo#include <string.h> 39337817Scy#include <sysexits.h> 40346981Scy#include <time.h> /* ctime */ 41346981Scy#include <timeconv.h> /* _long_to_time */ 42346981Scy#include <unistd.h> 43214501Srpaulo#include <fcntl.h> 44214501Srpaulo 45346981Scy#include <net/ethernet.h> 46346981Scy#include <net/if.h> /* only IFNAMSIZ */ 47346981Scy#include <netinet/in.h> 48346981Scy#include <netinet/in_systm.h> /* only n_short, n_long */ 49346981Scy#include <netinet/ip.h> 50346981Scy#include <netinet/ip_icmp.h> 51346981Scy#include <netinet/ip_fw.h> 52346981Scy#include <netinet/tcp.h> 53346981Scy#include <arpa/inet.h> 54346981Scy 55346981Scystruct cmdline_opts co; /* global options */ 56346981Scy 57346981Scyint resvd_set_number = RESVD_SET; 58346981Scy 59346981Scy#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 60346981Scy if (!av[0]) \ 61346981Scy errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 62346981Scy if (_substrcmp(*av, "tablearg") == 0) { \ 63346981Scy arg = IP_FW_TABLEARG; \ 64346981Scy break; \ 65346981Scy } \ 66346981Scy \ 67346981Scy { \ 68346981Scy long _xval; \ 69346981Scy char *end; \ 70346981Scy \ 71346981Scy _xval = strtol(*av, &end, 10); \ 72346981Scy \ 73346981Scy if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 74346981Scy errx(EX_DATAERR, "%s: invalid argument: %s", \ 75346981Scy match_value(s_x, tok), *av); \ 76346981Scy \ 77346981Scy if (errno == ERANGE || _xval < min || _xval > max) \ 78346981Scy errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 79346981Scy match_value(s_x, tok), min, max, *av); \ 80346981Scy \ 81346981Scy if (_xval == IP_FW_TABLEARG) \ 82346981Scy errx(EX_DATAERR, "%s: illegal argument value: %s", \ 83346981Scy match_value(s_x, tok), *av); \ 84346981Scy arg = _xval; \ 85346981Scy } \ 86346981Scy} while (0) 87346981Scy 88346981Scystatic void 89346981ScyPRINT_UINT_ARG(const char *str, uint32_t arg) 90346981Scy{ 91346981Scy if (str != NULL) 92346981Scy printf("%s",str); 93346981Scy if (arg == IP_FW_TABLEARG) 94346981Scy printf("tablearg"); 95346981Scy else 96346981Scy printf("%u", arg); 97346981Scy} 98346981Scy 99346981Scystatic struct _s_x f_tcpflags[] = { 100346981Scy { "syn", TH_SYN }, 101346981Scy { "fin", TH_FIN }, 102346981Scy { "ack", TH_ACK }, 103346981Scy { "psh", TH_PUSH }, 104346981Scy { "rst", TH_RST }, 105346981Scy { "urg", TH_URG }, 106214501Srpaulo { "tcp flag", 0 }, 107252726Srpaulo { NULL, 0 } 108214501Srpaulo}; 109214501Srpaulo 110214501Srpaulostatic struct _s_x f_tcpopts[] = { 111214501Srpaulo { "mss", IP_FW_TCPOPT_MSS }, 112252726Srpaulo { "maxseg", IP_FW_TCPOPT_MSS }, 113252726Srpaulo { "window", IP_FW_TCPOPT_WINDOW }, 114346981Scy { "sack", IP_FW_TCPOPT_SACK }, 115252726Srpaulo { "ts", IP_FW_TCPOPT_TS }, 116252726Srpaulo { "timestamp", IP_FW_TCPOPT_TS }, 117346981Scy { "cc", IP_FW_TCPOPT_CC }, 118252726Srpaulo { "tcp option", 0 }, 119252726Srpaulo { NULL, 0 } 120281806Srpaulo}; 121214501Srpaulo 122214501Srpaulo/* 123214501Srpaulo * IP options span the range 0 to 255 so we need to remap them 124214501Srpaulo * (though in fact only the low 5 bits are significant). 125214501Srpaulo */ 126214501Srpaulostatic struct _s_x f_ipopts[] = { 127214501Srpaulo { "ssrr", IP_FW_IPOPT_SSRR}, 128214501Srpaulo { "lsrr", IP_FW_IPOPT_LSRR}, 129214501Srpaulo { "rr", IP_FW_IPOPT_RR}, 130289549Srpaulo { "ts", IP_FW_IPOPT_TS}, 131289549Srpaulo { "ip option", 0 }, 132214501Srpaulo { NULL, 0 } 133214501Srpaulo}; 134252726Srpaulo 135214501Srpaulostatic struct _s_x f_iptos[] = { 136214501Srpaulo { "lowdelay", IPTOS_LOWDELAY}, 137214501Srpaulo { "throughput", IPTOS_THROUGHPUT}, 138214501Srpaulo { "reliability", IPTOS_RELIABILITY}, 139252726Srpaulo { "mincost", IPTOS_MINCOST}, 140214501Srpaulo { "congestion", IPTOS_ECN_CE}, 141214501Srpaulo { "ecntransport", IPTOS_ECN_ECT0}, 142214501Srpaulo { "ip tos option", 0}, 143214501Srpaulo { NULL, 0 } 144214501Srpaulo}; 145214501Srpaulo 146214501Srpaulostatic struct _s_x limit_masks[] = { 147214501Srpaulo {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 148214501Srpaulo {"src-addr", DYN_SRC_ADDR}, 149214501Srpaulo {"src-port", DYN_SRC_PORT}, 150214501Srpaulo {"dst-addr", DYN_DST_ADDR}, 151214501Srpaulo {"dst-port", DYN_DST_PORT}, 152281806Srpaulo {NULL, 0} 153281806Srpaulo}; 154281806Srpaulo 155281806Srpaulo/* 156281806Srpaulo * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 157281806Srpaulo * This is only used in this code. 158214501Srpaulo */ 159214501Srpaulo#define IPPROTO_ETHERTYPE 0x1000 160214501Srpaulostatic struct _s_x ether_types[] = { 161289549Srpaulo /* 162289549Srpaulo * Note, we cannot use "-:&/" in the names because they are field 163214501Srpaulo * separators in the type specifications. Also, we use s = NULL as 164214501Srpaulo * end-delimiter, because a type of 0 can be legal. 165214501Srpaulo */ 166214501Srpaulo { "ip", 0x0800 }, 167281806Srpaulo { "ipv4", 0x0800 }, 168214501Srpaulo { "ipv6", 0x86dd }, 169252726Srpaulo { "arp", 0x0806 }, 170252726Srpaulo { "rarp", 0x8035 }, 171252726Srpaulo { "vlan", 0x8100 }, 172252726Srpaulo { "loop", 0x9000 }, 173252726Srpaulo { "trail", 0x1000 }, 174252726Srpaulo { "at", 0x809b }, 175214501Srpaulo { "atalk", 0x809b }, 176214501Srpaulo { "aarp", 0x80f3 }, 177252726Srpaulo { "pppoe_disc", 0x8863 }, 178252726Srpaulo { "pppoe_sess", 0x8864 }, 179252726Srpaulo { "ipx_8022", 0x00E0 }, 180214501Srpaulo { "ipx_8023", 0x0000 }, 181252726Srpaulo { "ipx_ii", 0x8137 }, 182214501Srpaulo { "ipx_snap", 0x8137 }, 183252726Srpaulo { "ipx", 0x8137 }, 184214501Srpaulo { "ns", 0x0600 }, 185337817Scy { NULL, 0 } 186337817Scy}; 187337817Scy 188337817Scy 189337817Scystatic struct _s_x rule_actions[] = { 190337817Scy { "accept", TOK_ACCEPT }, 191337817Scy { "pass", TOK_ACCEPT }, 192337817Scy { "allow", TOK_ACCEPT }, 193337817Scy { "permit", TOK_ACCEPT }, 194337817Scy { "count", TOK_COUNT }, 195337817Scy { "pipe", TOK_PIPE }, 196337817Scy { "queue", TOK_QUEUE }, 197337817Scy { "divert", TOK_DIVERT }, 198337817Scy { "tee", TOK_TEE }, 199337817Scy { "netgraph", TOK_NETGRAPH }, 200252726Srpaulo { "ngtee", TOK_NGTEE }, 201252726Srpaulo { "fwd", TOK_FORWARD }, 202252726Srpaulo { "forward", TOK_FORWARD }, 203252726Srpaulo { "skipto", TOK_SKIPTO }, 204252726Srpaulo { "deny", TOK_DENY }, 205281806Srpaulo { "drop", TOK_DENY }, 206281806Srpaulo { "reject", TOK_REJECT }, 207252726Srpaulo { "reset6", TOK_RESET6 }, 208252726Srpaulo { "reset", TOK_RESET }, 209252726Srpaulo { "unreach6", TOK_UNREACH6 }, 210281806Srpaulo { "unreach", TOK_UNREACH }, 211281806Srpaulo { "check-state", TOK_CHECKSTATE }, 212281806Srpaulo { "//", TOK_COMMENT }, 213281806Srpaulo { "nat", TOK_NAT }, 214281806Srpaulo { "reass", TOK_REASS }, 215281806Srpaulo { "setfib", TOK_SETFIB }, 216281806Srpaulo { NULL, 0 } /* terminator */ 217281806Srpaulo}; 218281806Srpaulo 219281806Srpaulostatic struct _s_x rule_action_params[] = { 220281806Srpaulo { "altq", TOK_ALTQ }, 221281806Srpaulo { "log", TOK_LOG }, 222281806Srpaulo { "tag", TOK_TAG }, 223281806Srpaulo { "untag", TOK_UNTAG }, 224281806Srpaulo { NULL, 0 } /* terminator */ 225281806Srpaulo}; 226281806Srpaulo 227281806Srpaulo/* 228281806Srpaulo * The 'lookup' instruction accepts one of the following arguments. 229281806Srpaulo * -1 is a terminator for the list. 230281806Srpaulo * Arguments are passed as v[1] in O_DST_LOOKUP options. 231281806Srpaulo */ 232281806Srpaulostatic int lookup_key[] = { 233252726Srpaulo TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 234252726Srpaulo TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 235252726Srpaulo 236252726Srpaulostatic struct _s_x rule_options[] = { 237252726Srpaulo { "tagged", TOK_TAGGED }, 238252726Srpaulo { "uid", TOK_UID }, 239252726Srpaulo { "gid", TOK_GID }, 240346981Scy { "jail", TOK_JAIL }, 241346981Scy { "in", TOK_IN }, 242346981Scy { "limit", TOK_LIMIT }, 243346981Scy { "keep-state", TOK_KEEPSTATE }, 244346981Scy { "bridged", TOK_LAYER2 }, 245346981Scy { "layer2", TOK_LAYER2 }, 246346981Scy { "out", TOK_OUT }, 247346981Scy { "diverted", TOK_DIVERTED }, 248252726Srpaulo { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 249252726Srpaulo { "diverted-output", TOK_DIVERTEDOUTPUT }, 250289549Srpaulo { "xmit", TOK_XMIT }, 251289549Srpaulo { "recv", TOK_RECV }, 252289549Srpaulo { "via", TOK_VIA }, 253289549Srpaulo { "fragment", TOK_FRAG }, 254289549Srpaulo { "frag", TOK_FRAG }, 255289549Srpaulo { "fib", TOK_FIB }, 256289549Srpaulo { "ipoptions", TOK_IPOPTS }, 257289549Srpaulo { "ipopts", TOK_IPOPTS }, 258337817Scy { "iplen", TOK_IPLEN }, 259337817Scy { "ipid", TOK_IPID }, 260337817Scy { "ipprecedence", TOK_IPPRECEDENCE }, 261337817Scy { "dscp", TOK_DSCP }, 262337817Scy { "iptos", TOK_IPTOS }, 263214501Srpaulo { "ipttl", TOK_IPTTL }, 264214501Srpaulo { "ipversion", TOK_IPVER }, 265252726Srpaulo { "ipver", TOK_IPVER }, 266214501Srpaulo { "estab", TOK_ESTAB }, 267289549Srpaulo { "established", TOK_ESTAB }, 268289549Srpaulo { "setup", TOK_SETUP }, 269214501Srpaulo { "sockarg", TOK_SOCKARG }, 270214501Srpaulo { "tcpdatalen", TOK_TCPDATALEN }, 271214501Srpaulo { "tcpflags", TOK_TCPFLAGS }, 272252726Srpaulo { "tcpflgs", TOK_TCPFLAGS }, 273214501Srpaulo { "tcpoptions", TOK_TCPOPTS }, 274214501Srpaulo { "tcpopts", TOK_TCPOPTS }, 275346981Scy { "tcpseq", TOK_TCPSEQ }, 276346981Scy { "tcpack", TOK_TCPACK }, 277346981Scy { "tcpwin", TOK_TCPWIN }, 278214501Srpaulo { "icmptype", TOK_ICMPTYPES }, 279252726Srpaulo { "icmptypes", TOK_ICMPTYPES }, 280214501Srpaulo { "dst-ip", TOK_DSTIP }, 281214501Srpaulo { "src-ip", TOK_SRCIP }, 282252726Srpaulo { "dst-port", TOK_DSTPORT }, 283289549Srpaulo { "src-port", TOK_SRCPORT }, 284214501Srpaulo { "proto", TOK_PROTO }, 285252726Srpaulo { "MAC", TOK_MAC }, 286252726Srpaulo { "mac", TOK_MAC }, 287252726Srpaulo { "mac-type", TOK_MACTYPE }, 288252726Srpaulo { "verrevpath", TOK_VERREVPATH }, 289289549Srpaulo { "versrcreach", TOK_VERSRCREACH }, 290289549Srpaulo { "antispoof", TOK_ANTISPOOF }, 291252726Srpaulo { "ipsec", TOK_IPSEC }, 292252726Srpaulo { "icmp6type", TOK_ICMP6TYPES }, 293252726Srpaulo { "icmp6types", TOK_ICMP6TYPES }, 294252726Srpaulo { "ext6hdr", TOK_EXT6HDR}, 295214501Srpaulo { "flow-id", TOK_FLOWID}, 296214501Srpaulo { "ipv6", TOK_IPV6}, 297252726Srpaulo { "ip6", TOK_IPV6}, 298214501Srpaulo { "ipv4", TOK_IPV4}, 299214501Srpaulo { "ip4", TOK_IPV4}, 300214501Srpaulo { "dst-ipv6", TOK_DSTIP6}, 301281806Srpaulo { "dst-ip6", TOK_DSTIP6}, 302281806Srpaulo { "src-ipv6", TOK_SRCIP6}, 303214501Srpaulo { "src-ip6", TOK_SRCIP6}, 304289549Srpaulo { "lookup", TOK_LOOKUP}, 305289549Srpaulo { "//", TOK_COMMENT }, 306214501Srpaulo 307214501Srpaulo { "not", TOK_NOT }, /* pseudo option */ 308214501Srpaulo { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 309346981Scy { "or", TOK_OR }, /* pseudo option */ 310252726Srpaulo { "|", /* escape */ TOK_OR }, /* pseudo option */ 311346981Scy { "{", TOK_STARTBRACE }, /* pseudo option */ 312346981Scy { "(", TOK_STARTBRACE }, /* pseudo option */ 313214501Srpaulo { "}", TOK_ENDBRACE }, /* pseudo option */ 314289549Srpaulo { ")", TOK_ENDBRACE }, /* pseudo option */ 315289549Srpaulo { NULL, 0 } /* terminator */ 316289549Srpaulo}; 317214501Srpaulo 318252726Srpaulo/* 319252726Srpaulo * Helper routine to print a possibly unaligned uint64_t on 320252726Srpaulo * various platform. If width > 0, print the value with 321252726Srpaulo * the desired width, followed by a space; 322252726Srpaulo * otherwise, return the required width. 323252726Srpaulo */ 324252726Srpauloint 325252726Srpaulopr_u64(uint64_t *pd, int width) 326252726Srpaulo{ 327252726Srpaulo#ifdef TCC 328214501Srpaulo#define U64_FMT "I64" 329252726Srpaulo#else 330252726Srpaulo#define U64_FMT "llu" 331252726Srpaulo#endif 332252726Srpaulo uint64_t u; 333346981Scy unsigned long long d; 334346981Scy 335252726Srpaulo bcopy (pd, &u, sizeof(u)); 336214501Srpaulo d = u; 337252726Srpaulo return (width > 0) ? 338252726Srpaulo printf("%*" U64_FMT " ", width, d) : 339252726Srpaulo snprintf(NULL, 0, "%" U64_FMT, d) ; 340252726Srpaulo#undef U64_FMT 341252726Srpaulo} 342214501Srpaulo 343252726Srpaulovoid * 344346981Scysafe_calloc(size_t number, size_t size) 345346981Scy{ 346346981Scy void *ret = calloc(number, size); 347252726Srpaulo 348252726Srpaulo if (ret == NULL) 349346981Scy err(EX_OSERR, "calloc"); 350346981Scy return ret; 351346981Scy} 352252726Srpaulo 353252726Srpaulovoid * 354252726Srpaulosafe_realloc(void *ptr, size_t size) 355252726Srpaulo{ 356252726Srpaulo void *ret = realloc(ptr, size); 357252726Srpaulo 358252726Srpaulo if (ret == NULL) 359252726Srpaulo err(EX_OSERR, "realloc"); 360252726Srpaulo return ret; 361252726Srpaulo} 362252726Srpaulo 363252726Srpaulo/* 364252726Srpaulo * conditionally runs the command. 365252726Srpaulo * Selected options or negative -> getsockopt 366252726Srpaulo */ 367252726Srpauloint 368252726Srpaulodo_cmd(int optname, void *optval, uintptr_t optlen) 369252726Srpaulo{ 370252726Srpaulo static int s = -1; /* the socket */ 371252726Srpaulo int i; 372252726Srpaulo 373252726Srpaulo if (co.test_only) 374252726Srpaulo return 0; 375252726Srpaulo 376252726Srpaulo if (s == -1) 377252726Srpaulo s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 378346981Scy if (s < 0) 379252726Srpaulo err(EX_UNAVAILABLE, "socket"); 380252726Srpaulo 381252726Srpaulo if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 382252726Srpaulo optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST || 383252726Srpaulo optname == IP_FW_TABLE_GETSIZE || 384252726Srpaulo optname == IP_FW_NAT_GET_CONFIG || 385252726Srpaulo optname < 0 || 386252726Srpaulo optname == IP_FW_NAT_GET_LOG) { 387252726Srpaulo if (optname < 0) 388252726Srpaulo optname = -optname; 389252726Srpaulo i = getsockopt(s, IPPROTO_IP, optname, optval, 390252726Srpaulo (socklen_t *)optlen); 391252726Srpaulo } else { 392346981Scy i = setsockopt(s, IPPROTO_IP, optname, optval, optlen); 393214501Srpaulo } 394252726Srpaulo return i; 395252726Srpaulo} 396289549Srpaulo 397252726Srpaulo/** 398252726Srpaulo * match_token takes a table and a string, returns the value associated 399252726Srpaulo * with the string (-1 in case of failure). 400252726Srpaulo */ 401252726Srpauloint 402252726Srpaulomatch_token(struct _s_x *table, char *string) 403252726Srpaulo{ 404252726Srpaulo struct _s_x *pt; 405252726Srpaulo uint i = strlen(string); 406252726Srpaulo 407252726Srpaulo for (pt = table ; i && pt->s != NULL ; pt++) 408252726Srpaulo if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 409252726Srpaulo return pt->x; 410252726Srpaulo return -1; 411214501Srpaulo} 412252726Srpaulo 413289549Srpaulo/** 414289549Srpaulo * match_value takes a table and a value, returns the string associated 415252726Srpaulo * with the value (NULL in case of failure). 416252726Srpaulo */ 417214501Srpaulochar const * 418214501Srpaulomatch_value(struct _s_x *p, int value) 419252726Srpaulo{ 420252726Srpaulo for (; p->s != NULL; p++) 421281806Srpaulo if (p->x == value) 422281806Srpaulo return p->s; 423281806Srpaulo return NULL; 424281806Srpaulo} 425281806Srpaulo 426281806Srpaulo/* 427281806Srpaulo * _substrcmp takes two strings and returns 1 if they do not match, 428281806Srpaulo * and 0 if they match exactly or the first string is a sub-string 429281806Srpaulo * of the second. A warning is printed to stderr in the case that the 430281806Srpaulo * first string is a sub-string of the second. 431281806Srpaulo * 432281806Srpaulo * This function will be removed in the future through the usual 433281806Srpaulo * deprecation process. 434281806Srpaulo */ 435281806Srpauloint 436289549Srpaulo_substrcmp(const char *str1, const char* str2) 437289549Srpaulo{ 438281806Srpaulo 439281806Srpaulo if (strncmp(str1, str2, strlen(str1)) != 0) 440281806Srpaulo return 1; 441281806Srpaulo 442281806Srpaulo if (strlen(str1) != strlen(str2)) 443281806Srpaulo warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 444214501Srpaulo str1, str2); 445337817Scy return 0; 446337817Scy} 447337817Scy 448337817Scy/* 449337817Scy * _substrcmp2 takes three strings and returns 1 if the first two do not match, 450337817Scy * and 0 if they match exactly or the second string is a sub-string 451337817Scy * of the first. A warning is printed to stderr in the case that the 452337817Scy * first string does not match the third. 453337817Scy * 454337817Scy * This function exists to warn about the bizzare construction 455337817Scy * strncmp(str, "by", 2) which is used to allow people to use a shotcut 456252726Srpaulo * for "bytes". The problem is that in addition to accepting "by", 457214501Srpaulo * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 458252726Srpaulo * other string beginning with "by". 459214501Srpaulo * 460346981Scy * This function will be removed in the future through the usual 461252726Srpaulo * deprecation process. 462252726Srpaulo */ 463346981Scyint 464346981Scy_substrcmp2(const char *str1, const char* str2, const char* str3) 465346981Scy{ 466346981Scy 467346981Scy if (strncmp(str1, str2, strlen(str2)) != 0) 468252726Srpaulo return 1; 469346981Scy 470346981Scy if (strcmp(str1, str3) != 0) 471346981Scy warnx("DEPRECATED: '%s' matched '%s'", 472346981Scy str1, str3); 473346981Scy return 0; 474346981Scy} 475346981Scy 476346981Scy/* 477346981Scy * prints one port, symbolic or numeric 478346981Scy */ 479346981Scystatic void 480346981Scyprint_port(int proto, uint16_t port) 481346981Scy{ 482346981Scy 483346981Scy if (proto == IPPROTO_ETHERTYPE) { 484346981Scy char const *s; 485346981Scy 486346981Scy if (co.do_resolv && (s = match_value(ether_types, port)) ) 487346981Scy printf("%s", s); 488346981Scy else 489346981Scy printf("0x%04x", port); 490346981Scy } else { 491346981Scy struct servent *se = NULL; 492346981Scy if (co.do_resolv) { 493346981Scy struct protoent *pe = getprotobynumber(proto); 494346981Scy 495346981Scy se = getservbyport(htons(port), pe ? pe->p_name : NULL); 496346981Scy } 497346981Scy if (se) 498346981Scy printf("%s", se->s_name); 499346981Scy else 500346981Scy printf("%d", port); 501346981Scy } 502346981Scy} 503346981Scy 504346981Scystatic struct _s_x _port_name[] = { 505346981Scy {"dst-port", O_IP_DSTPORT}, 506346981Scy {"src-port", O_IP_SRCPORT}, 507346981Scy {"ipid", O_IPID}, 508346981Scy {"iplen", O_IPLEN}, 509346981Scy {"ipttl", O_IPTTL}, 510346981Scy {"mac-type", O_MAC_TYPE}, 511346981Scy {"tcpdatalen", O_TCPDATALEN}, 512346981Scy {"tagged", O_TAGGED}, 513346981Scy {NULL, 0} 514346981Scy}; 515346981Scy 516346981Scy/* 517346981Scy * Print the values in a list 16-bit items of the types above. 518346981Scy * XXX todo: add support for mask. 519346981Scy */ 520346981Scystatic void 521346981Scyprint_newports(ipfw_insn_u16 *cmd, int proto, int opcode) 522346981Scy{ 523346981Scy uint16_t *p = cmd->ports; 524346981Scy int i; 525346981Scy char const *sep; 526346981Scy 527346981Scy if (opcode != 0) { 528346981Scy sep = match_value(_port_name, opcode); 529346981Scy if (sep == NULL) 530346981Scy sep = "???"; 531346981Scy printf (" %s", sep); 532346981Scy } 533346981Scy sep = " "; 534346981Scy for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 535346981Scy printf("%s", sep); 536346981Scy print_port(proto, p[0]); 537346981Scy if (p[0] != p[1]) { 538346981Scy printf("-"); 539346981Scy print_port(proto, p[1]); 540346981Scy } 541346981Scy sep = ","; 542346981Scy } 543346981Scy} 544346981Scy 545346981Scy/* 546346981Scy * Like strtol, but also translates service names into port numbers 547346981Scy * for some protocols. 548346981Scy * In particular: 549346981Scy * proto == -1 disables the protocol check; 550346981Scy * proto == IPPROTO_ETHERTYPE looks up an internal table 551346981Scy * proto == <some value in /etc/protocols> matches the values there. 552346981Scy * Returns *end == s in case the parameter is not found. 553346981Scy */ 554346981Scystatic int 555346981Scystrtoport(char *s, char **end, int base, int proto) 556346981Scy{ 557346981Scy char *p, *buf; 558346981Scy char *s1; 559346981Scy int i; 560346981Scy 561346981Scy *end = s; /* default - not found */ 562346981Scy if (*s == '\0') 563346981Scy return 0; /* not found */ 564346981Scy 565346981Scy if (isdigit(*s)) 566346981Scy return strtol(s, end, base); 567346981Scy 568346981Scy /* 569346981Scy * find separator. '\\' escapes the next char. 570346981Scy */ 571346981Scy for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 572346981Scy if (*s1 == '\\' && s1[1] != '\0') 573346981Scy s1++; 574346981Scy 575346981Scy buf = safe_calloc(s1 - s + 1, 1); 576346981Scy 577346981Scy /* 578346981Scy * copy into a buffer skipping backslashes 579346981Scy */ 580346981Scy for (p = s, i = 0; p != s1 ; p++) 581346981Scy if (*p != '\\') 582346981Scy buf[i++] = *p; 583346981Scy buf[i++] = '\0'; 584346981Scy 585346981Scy if (proto == IPPROTO_ETHERTYPE) { 586346981Scy i = match_token(ether_types, buf); 587346981Scy free(buf); 588346981Scy if (i != -1) { /* found */ 589346981Scy *end = s1; 590346981Scy return i; 591346981Scy } 592346981Scy } else { 593346981Scy struct protoent *pe = NULL; 594346981Scy struct servent *se; 595346981Scy 596346981Scy if (proto != 0) 597346981Scy pe = getprotobynumber(proto); 598346981Scy setservent(1); 599346981Scy se = getservbyname(buf, pe ? pe->p_name : NULL); 600346981Scy free(buf); 601346981Scy if (se != NULL) { 602252726Srpaulo *end = s1; 603281806Srpaulo return ntohs(se->s_port); 604346981Scy } 605346981Scy } 606346981Scy return 0; /* not found */ 607346981Scy} 608281806Srpaulo 609346981Scy/* 610252726Srpaulo * Fill the body of the command with the list of port ranges. 611252726Srpaulo */ 612252726Srpaulostatic int 613346981Scyfill_newports(ipfw_insn_u16 *cmd, char *av, int proto) 614252726Srpaulo{ 615214501Srpaulo uint16_t a, b, *p = cmd->ports; 616214501Srpaulo int i = 0; 617281806Srpaulo char *s = av; 618214501Srpaulo 619281806Srpaulo while (*s) { 620281806Srpaulo a = strtoport(av, &s, 0, proto); 621252726Srpaulo if (s == av) /* empty or invalid argument */ 622252726Srpaulo return (0); 623346981Scy 624346981Scy switch (*s) { 625346981Scy case '-': /* a range */ 626346981Scy av = s + 1; 627346981Scy b = strtoport(av, &s, 0, proto); 628346981Scy /* Reject expressions like '1-abc' or '1-2-3'. */ 629252726Srpaulo if (s == av || (*s != ',' && *s != '\0')) 630252726Srpaulo return (0); 631252726Srpaulo p[0] = a; 632214501Srpaulo p[1] = b; 633214501Srpaulo break; 634214501Srpaulo case ',': /* comma separated list */ 635214501Srpaulo case '\0': 636252726Srpaulo p[0] = p[1] = a; 637252726Srpaulo break; 638252726Srpaulo default: 639252726Srpaulo warnx("port list: invalid separator <%c> in <%s>", 640252726Srpaulo *s, av); 641252726Srpaulo return (0); 642252726Srpaulo } 643214501Srpaulo 644252726Srpaulo i++; 645252726Srpaulo p += 2; 646346981Scy av = s + 1; 647252726Srpaulo } 648346981Scy if (i > 0) { 649252726Srpaulo if (i + 1 > F_LEN_MASK) 650252726Srpaulo errx(EX_DATAERR, "too many ports/ranges\n"); 651252726Srpaulo cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 652214501Srpaulo } 653214501Srpaulo return (i); 654214501Srpaulo} 655214501Srpaulo 656214501Srpaulostatic struct _s_x icmpcodes[] = { 657214501Srpaulo { "net", ICMP_UNREACH_NET }, 658214501Srpaulo { "host", ICMP_UNREACH_HOST }, 659252726Srpaulo { "protocol", ICMP_UNREACH_PROTOCOL }, 660252726Srpaulo { "port", ICMP_UNREACH_PORT }, 661252726Srpaulo { "needfrag", ICMP_UNREACH_NEEDFRAG }, 662252726Srpaulo { "srcfail", ICMP_UNREACH_SRCFAIL }, 663252726Srpaulo { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 664252726Srpaulo { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 665252726Srpaulo { "isolated", ICMP_UNREACH_ISOLATED }, 666252726Srpaulo { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 667289549Srpaulo { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 668289549Srpaulo { "tosnet", ICMP_UNREACH_TOSNET }, 669252726Srpaulo { "toshost", ICMP_UNREACH_TOSHOST }, 670252726Srpaulo { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 671252726Srpaulo { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 672214501Srpaulo { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 673214501Srpaulo { NULL, 0 } 674214501Srpaulo}; 675214501Srpaulo 676214501Srpaulostatic void 677289549Srpaulofill_reject_code(u_short *codep, char *str) 678289549Srpaulo{ 679289549Srpaulo int val; 680214501Srpaulo char *s; 681214501Srpaulo 682214501Srpaulo val = strtoul(str, &s, 0); 683252726Srpaulo if (s == str || *s != '\0' || val >= 0x100) 684214501Srpaulo val = match_token(icmpcodes, str); 685214501Srpaulo if (val < 0) 686214501Srpaulo errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 687214501Srpaulo *codep = val; 688214501Srpaulo return; 689214501Srpaulo} 690214501Srpaulo 691214501Srpaulostatic void 692252726Srpauloprint_reject_code(uint16_t code) 693252726Srpaulo{ 694252726Srpaulo char const *s = match_value(icmpcodes, code); 695214501Srpaulo 696346981Scy if (s != NULL) 697252726Srpaulo printf("unreach %s", s); 698252726Srpaulo else 699252726Srpaulo printf("unreach %u", code); 700289549Srpaulo} 701289549Srpaulo 702252726Srpaulo/* 703346981Scy * Returns the number of bits set (from left) in a contiguous bitmask, 704252726Srpaulo * or -1 if the mask is not contiguous. 705252726Srpaulo * XXX this needs a proper fix. 706252726Srpaulo * This effectively works on masks in big-endian (network) format. 707346981Scy * when compiled on little endian architectures. 708346981Scy * 709346981Scy * First bit is bit 7 of the first byte -- note, for MAC addresses, 710346981Scy * the first bit on the wire is bit 0 of the first byte. 711346981Scy * len is the max length in bits. 712346981Scy */ 713346981Scyint 714346981Scycontigmask(uint8_t *p, int len) 715346981Scy{ 716346981Scy int i, n; 717346981Scy 718346981Scy for (i=0; i<len ; i++) 719346981Scy if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 720346981Scy break; 721346981Scy for (n=i+1; n < len; n++) 722346981Scy if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 723346981Scy return -1; /* mask not contiguous */ 724346981Scy return i; 725346981Scy} 726346981Scy 727346981Scy/* 728346981Scy * print flags set/clear in the two bitmasks passed as parameters. 729346981Scy * There is a specialized check for f_tcpflags. 730346981Scy */ 731346981Scystatic void 732346981Scyprint_flags(char const *name, ipfw_insn *cmd, struct _s_x *list) 733346981Scy{ 734346981Scy char const *comma = ""; 735346981Scy int i; 736346981Scy uint8_t set = cmd->arg1 & 0xff; 737346981Scy uint8_t clear = (cmd->arg1 >> 8) & 0xff; 738346981Scy 739346981Scy if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 740346981Scy printf(" setup"); 741346981Scy return; 742346981Scy } 743346981Scy 744346981Scy printf(" %s ", name); 745346981Scy for (i=0; list[i].x != 0; i++) { 746346981Scy if (set & list[i].x) { 747346981Scy set &= ~list[i].x; 748346981Scy printf("%s%s", comma, list[i].s); 749346981Scy comma = ","; 750346981Scy } 751346981Scy if (clear & list[i].x) { 752346981Scy clear &= ~list[i].x; 753346981Scy printf("%s!%s", comma, list[i].s); 754346981Scy comma = ","; 755346981Scy } 756346981Scy } 757346981Scy} 758346981Scy 759346981Scy/* 760346981Scy * Print the ip address contained in a command. 761346981Scy */ 762346981Scystatic void 763346981Scyprint_ip(ipfw_insn_ip *cmd, char const *s) 764346981Scy{ 765346981Scy struct hostent *he = NULL; 766346981Scy uint32_t len = F_LEN((ipfw_insn *)cmd); 767346981Scy uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 768346981Scy 769346981Scy if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 770346981Scy uint32_t d = a[1]; 771346981Scy const char *arg = "<invalid>"; 772346981Scy 773346981Scy if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 774252726Srpaulo arg = match_value(rule_options, lookup_key[d]); 775351611Scy printf("%s lookup %s %d", cmd->o.len & F_NOT ? " not": "", 776351611Scy arg, cmd->o.arg1); 777252726Srpaulo return; 778346981Scy } 779346981Scy printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s); 780214501Srpaulo 781337817Scy if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 782337817Scy printf("me"); 783346981Scy return; 784214501Srpaulo } 785252726Srpaulo if (cmd->o.opcode == O_IP_SRC_LOOKUP || 786281806Srpaulo cmd->o.opcode == O_IP_DST_LOOKUP) { 787351611Scy printf("table(%u", ((ipfw_insn *)cmd)->arg1); 788351611Scy if (len == F_INSN_SIZE(ipfw_insn_u32)) 789346981Scy printf(",%u", *a); 790346981Scy printf(")"); 791252726Srpaulo return; 792351611Scy } 793351611Scy if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 794351611Scy uint32_t x, *map = (uint32_t *)&(cmd->mask); 795351611Scy int i, j; 796351611Scy char comma = '{'; 797351611Scy 798351611Scy x = cmd->o.arg1 - 1; 799252726Srpaulo x = htonl( ~x ); 800252726Srpaulo cmd->addr.s_addr = htonl(cmd->addr.s_addr); 801252726Srpaulo printf("%s/%d", inet_ntoa(cmd->addr), 802252726Srpaulo contigmask((uint8_t *)&x, 32)); 803252726Srpaulo x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 804289549Srpaulo x &= 0xff; /* base */ 805289549Srpaulo /* 806252726Srpaulo * Print bits and ranges. 807252726Srpaulo * Locate first bit set (i), then locate first bit unset (j). 808252726Srpaulo * If we have 3+ consecutive bits set, then print them as a 809281806Srpaulo * range, otherwise only print the initial bit and rescan. 810281806Srpaulo */ 811351611Scy for (i=0; i < cmd->o.arg1; i++) 812281806Srpaulo if (map[i/32] & (1<<(i & 31))) { 813281806Srpaulo for (j=i+1; j < cmd->o.arg1; j++) 814351611Scy if (!(map[ j/32] & (1<<(j & 31)))) 815281806Srpaulo break; 816281806Srpaulo printf("%c%d", comma, i+x); 817351611Scy if (j>i+2) { /* range has at least 3 elements */ 818281806Srpaulo printf("-%d", j-1+x); 819281806Srpaulo i = j-1; 820281806Srpaulo } 821281806Srpaulo comma = ','; 822281806Srpaulo } 823351611Scy printf("}"); 824281806Srpaulo return; 825281806Srpaulo } 826281806Srpaulo /* 827281806Srpaulo * len == 2 indicates a single IP, whereas lists of 1 or more 828281806Srpaulo * addr/mask pairs have len = (2n+1). We convert len to n so we 829281806Srpaulo * use that to count the number of entries. 830281806Srpaulo */ 831281806Srpaulo for (len = len / 2; len > 0; len--, a += 2) { 832281806Srpaulo int mb = /* mask length */ 833281806Srpaulo (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 834281806Srpaulo 32 : contigmask((uint8_t *)&(a[1]), 32); 835337817Scy if (mb == 32 && co.do_resolv) 836337817Scy he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 837281806Srpaulo if (he != NULL) /* resolved to name */ 838281806Srpaulo printf("%s", he->h_name); 839281806Srpaulo else if (mb == 0) /* any */ 840252726Srpaulo printf("any"); 841252726Srpaulo else { /* numeric IP followed by some kind of mask */ 842346981Scy printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) ); 843281806Srpaulo if (mb < 0) 844346981Scy printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) ); 845346981Scy else if (mb < 32) 846346981Scy printf("/%d", mb); 847346981Scy } 848346981Scy if (len > 1) 849346981Scy printf(","); 850346981Scy } 851346981Scy} 852346981Scy 853346981Scy/* 854346981Scy * prints a MAC address/mask pair 855252726Srpaulo */ 856351611Scystatic void 857351611Scyprint_mac(uint8_t *addr, uint8_t *mask) 858351611Scy{ 859281806Srpaulo int l = contigmask(mask, 48); 860346981Scy 861346981Scy if (l == 0) 862281806Srpaulo printf(" any"); 863351611Scy else { 864351611Scy printf(" %02x:%02x:%02x:%02x:%02x:%02x", 865351611Scy addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 866351611Scy if (l == -1) 867351611Scy printf("&%02x:%02x:%02x:%02x:%02x:%02x", 868351611Scy mask[0], mask[1], mask[2], 869351611Scy mask[3], mask[4], mask[5]); 870351611Scy else if (l < 48) 871351611Scy printf("/%d", l); 872281806Srpaulo } 873281806Srpaulo} 874281806Srpaulo 875281806Srpaulostatic void 876281806Srpaulofill_icmptypes(ipfw_insn_u32 *cmd, char *av) 877281806Srpaulo{ 878281806Srpaulo uint8_t type; 879281806Srpaulo 880281806Srpaulo cmd->d[0] = 0; 881281806Srpaulo while (*av) { 882281806Srpaulo if (*av == ',') 883346981Scy av++; 884346981Scy 885346981Scy type = strtoul(av, &av, 0); 886252726Srpaulo 887252726Srpaulo if (*av != ',' && *av != '\0') 888252726Srpaulo errx(EX_DATAERR, "invalid ICMP type"); 889252726Srpaulo 890281806Srpaulo if (type > 31) 891281806Srpaulo errx(EX_DATAERR, "ICMP type out of range"); 892281806Srpaulo 893281806Srpaulo cmd->d[0] |= 1 << type; 894281806Srpaulo } 895281806Srpaulo cmd->o.opcode = O_ICMPTYPE; 896281806Srpaulo cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 897281806Srpaulo} 898281806Srpaulo 899281806Srpaulostatic void 900281806Srpauloprint_icmptypes(ipfw_insn_u32 *cmd) 901281806Srpaulo{ 902281806Srpaulo int i; 903281806Srpaulo char sep= ' '; 904281806Srpaulo 905281806Srpaulo printf(" icmptypes"); 906281806Srpaulo for (i = 0; i < 32; i++) { 907337817Scy if ( (cmd->d[0] & (1 << (i))) == 0) 908337817Scy continue; 909281806Srpaulo printf("%c%d", sep, i); 910289549Srpaulo sep = ','; 911337817Scy } 912281806Srpaulo} 913281806Srpaulo 914281806Srpaulo/* 915281806Srpaulo * show_ipfw() prints the body of an ipfw rule. 916281806Srpaulo * Because the standard rule has at least proto src_ip dst_ip, we use 917281806Srpaulo * a helper function to produce these entries if not provided explicitly. 918281806Srpaulo * The first argument is the list of fields we have, the second is 919289549Srpaulo * the list of fields we want to be printed. 920289549Srpaulo * 921289549Srpaulo * Special cases if we have provided a MAC header: 922289549Srpaulo * + if the rule does not contain IP addresses/ports, do not print them; 923281806Srpaulo * + if the rule does not contain an IP proto, print "all" instead of "ip"; 924289549Srpaulo * 925289549Srpaulo * Once we have 'have_options', IP header fields are printed as options. 926289549Srpaulo */ 927289549Srpaulo#define HAVE_PROTO 0x0001 928289549Srpaulo#define HAVE_SRCIP 0x0002 929289549Srpaulo#define HAVE_DSTIP 0x0004 930289549Srpaulo#define HAVE_PROTO4 0x0008 931289549Srpaulo#define HAVE_PROTO6 0x0010 932289549Srpaulo#define HAVE_IP 0x0100 933337817Scy#define HAVE_OPTIONS 0x8000 934337817Scy 935289549Srpaulostatic void 936289549Srpauloshow_prerequisites(int *flags, int want, int cmd __unused) 937289549Srpaulo{ 938289549Srpaulo if (co.comment_only) 939289549Srpaulo return; 940289549Srpaulo if ( (*flags & HAVE_IP) == HAVE_IP) 941281806Srpaulo *flags |= HAVE_OPTIONS; 942281806Srpaulo 943281806Srpaulo if ( !(*flags & HAVE_OPTIONS)) { 944337817Scy if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 945337817Scy if ( (*flags & HAVE_PROTO4)) 946281806Srpaulo printf(" ip4"); 947281806Srpaulo else if ( (*flags & HAVE_PROTO6)) 948289549Srpaulo printf(" ip6"); 949289549Srpaulo else 950281806Srpaulo printf(" ip"); 951289549Srpaulo } 952281806Srpaulo if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 953289549Srpaulo printf(" from any"); 954281806Srpaulo if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 955289549Srpaulo printf(" to any"); 956281806Srpaulo } 957281806Srpaulo *flags |= want; 958281806Srpaulo} 959337817Scy 960337817Scystatic void 961281806Srpauloshow_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth) 962281806Srpaulo{ 963351611Scy static int twidth = 0; 964289549Srpaulo int l; 965351611Scy ipfw_insn *cmd, *tagptr = NULL; 966351611Scy const char *comment = NULL; /* ptr to comment if we have one */ 967351611Scy int proto = 0; /* default */ 968289549Srpaulo int flags = 0; /* prerequisites */ 969351611Scy ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 970351611Scy ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 971351611Scy int or_block = 0; /* we are in an or block */ 972289549Srpaulo uint32_t set_disable; 973289549Srpaulo 974351611Scy bcopy(&rule->next_rule, &set_disable, sizeof(set_disable)); 975351611Scy 976351611Scy if (set_disable & (1 << rule->set)) { /* disabled */ 977351611Scy if (!co.show_sets) 978351611Scy return; 979289549Srpaulo else 980351611Scy printf("# DISABLED "); 981351611Scy } 982351611Scy printf("%05u ", rule->rulenum); 983351611Scy 984351611Scy if (pcwidth > 0 || bcwidth > 0) { 985351611Scy pr_u64(&rule->pcnt, pcwidth); 986351611Scy pr_u64(&rule->bcnt, bcwidth); 987351611Scy } 988289549Srpaulo 989289549Srpaulo if (co.do_time == 2) 990289549Srpaulo printf("%10u ", rule->timestamp); 991289549Srpaulo else if (co.do_time == 1) { 992337817Scy char timestr[30]; 993337817Scy time_t t = (time_t)0; 994281806Srpaulo 995281806Srpaulo if (twidth == 0) { 996281806Srpaulo strcpy(timestr, ctime(&t)); 997281806Srpaulo *strchr(timestr, '\n') = '\0'; 998281806Srpaulo twidth = strlen(timestr); 999281806Srpaulo } 1000281806Srpaulo if (rule->timestamp) { 1001281806Srpaulo t = _long_to_time(rule->timestamp); 1002252726Srpaulo 1003252726Srpaulo strcpy(timestr, ctime(&t)); 1004252726Srpaulo *strchr(timestr, '\n') = '\0'; 1005214501Srpaulo printf("%s ", timestr); 1006252726Srpaulo } else { 1007252726Srpaulo printf("%*s", twidth, " "); 1008214501Srpaulo } 1009252726Srpaulo } 1010252726Srpaulo 1011214501Srpaulo if (co.show_sets) 1012252726Srpaulo printf("set %d ", rule->set); 1013252726Srpaulo 1014252726Srpaulo /* 1015252726Srpaulo * print the optional "match probability" 1016252726Srpaulo */ 1017252726Srpaulo if (rule->cmd_len > 0) { 1018252726Srpaulo cmd = rule->cmd ; 1019252726Srpaulo if (cmd->opcode == O_PROB) { 1020252726Srpaulo ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1021252726Srpaulo double d = 1.0 * p->d[0]; 1022252726Srpaulo 1023214501Srpaulo d = (d / 0x7fffffff); 1024252726Srpaulo printf("prob %f ", d); 1025252726Srpaulo } 1026252726Srpaulo } 1027346981Scy 1028252726Srpaulo /* 1029252726Srpaulo * first print actions 1030252726Srpaulo */ 1031252726Srpaulo for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1032252726Srpaulo l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1033252726Srpaulo switch(cmd->opcode) { 1034252726Srpaulo case O_CHECK_STATE: 1035252726Srpaulo printf("check-state"); 1036252726Srpaulo /* avoid printing anything else */ 1037252726Srpaulo flags = HAVE_PROTO | HAVE_SRCIP | 1038252726Srpaulo HAVE_DSTIP | HAVE_IP; 1039252726Srpaulo break; 1040252726Srpaulo 1041252726Srpaulo case O_ACCEPT: 1042252726Srpaulo printf("allow"); 1043252726Srpaulo break; 1044252726Srpaulo 1045252726Srpaulo case O_COUNT: 1046346981Scy printf("count"); 1047252726Srpaulo break; 1048252726Srpaulo 1049346981Scy case O_DENY: 1050346981Scy printf("deny"); 1051346981Scy break; 1052346981Scy 1053346981Scy case O_REJECT: 1054346981Scy if (cmd->arg1 == ICMP_REJECT_RST) 1055346981Scy printf("reset"); 1056346981Scy else if (cmd->arg1 == ICMP_UNREACH_HOST) 1057346981Scy printf("reject"); 1058346981Scy else 1059346981Scy print_reject_code(cmd->arg1); 1060346981Scy break; 1061346981Scy 1062346981Scy case O_UNREACH6: 1063346981Scy if (cmd->arg1 == ICMP6_UNREACH_RST) 1064346981Scy printf("reset6"); 1065346981Scy else 1066346981Scy print_unreach6_code(cmd->arg1); 1067346981Scy break; 1068346981Scy 1069346981Scy case O_SKIPTO: 1070346981Scy PRINT_UINT_ARG("skipto ", cmd->arg1); 1071346981Scy break; 1072346981Scy 1073346981Scy case O_PIPE: 1074346981Scy PRINT_UINT_ARG("pipe ", cmd->arg1); 1075252726Srpaulo break; 1076252726Srpaulo 1077252726Srpaulo case O_QUEUE: 1078252726Srpaulo PRINT_UINT_ARG("queue ", cmd->arg1); 1079252726Srpaulo break; 1080252726Srpaulo 1081252726Srpaulo case O_DIVERT: 1082252726Srpaulo PRINT_UINT_ARG("divert ", cmd->arg1); 1083252726Srpaulo break; 1084252726Srpaulo 1085252726Srpaulo case O_TEE: 1086252726Srpaulo PRINT_UINT_ARG("tee ", cmd->arg1); 1087281806Srpaulo break; 1088252726Srpaulo 1089214501Srpaulo case O_NETGRAPH: 1090214501Srpaulo PRINT_UINT_ARG("netgraph ", cmd->arg1); 1091252726Srpaulo break; 1092252726Srpaulo 1093346981Scy case O_NGTEE: 1094252726Srpaulo PRINT_UINT_ARG("ngtee ", cmd->arg1); 1095252726Srpaulo break; 1096252726Srpaulo 1097252726Srpaulo case O_FORWARD_IP: 1098281806Srpaulo { 1099252726Srpaulo ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1100289549Srpaulo 1101289549Srpaulo if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1102252726Srpaulo printf("fwd tablearg"); 1103252726Srpaulo } else { 1104252726Srpaulo printf("fwd %s", inet_ntoa(s->sa.sin_addr)); 1105252726Srpaulo } 1106252726Srpaulo if (s->sa.sin_port) 1107252726Srpaulo printf(",%d", s->sa.sin_port); 1108252726Srpaulo } 1109252726Srpaulo break; 1110252726Srpaulo 1111346981Scy case O_LOG: /* O_LOG is printed last */ 1112346981Scy logptr = (ipfw_insn_log *)cmd; 1113346981Scy break; 1114346981Scy 1115346981Scy case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1116346981Scy altqptr = (ipfw_insn_altq *)cmd; 1117346981Scy break; 1118346981Scy 1119346981Scy case O_TAG: 1120346981Scy tagptr = cmd; 1121346981Scy break; 1122346981Scy 1123346981Scy case O_NAT: 1124252726Srpaulo if (cmd->arg1 != 0) 1125252726Srpaulo PRINT_UINT_ARG("nat ", cmd->arg1); 1126252726Srpaulo else 1127214501Srpaulo printf("nat global"); 1128214501Srpaulo break; 1129214501Srpaulo 1130346981Scy case O_SETFIB: 1131252726Srpaulo PRINT_UINT_ARG("setfib ", cmd->arg1); 1132281806Srpaulo break; 1133252726Srpaulo 1134281806Srpaulo case O_REASS: 1135252726Srpaulo printf("reass"); 1136281806Srpaulo break; 1137281806Srpaulo 1138346981Scy default: 1139252726Srpaulo printf("** unrecognized action %d len %d ", 1140346981Scy cmd->opcode, cmd->len); 1141281806Srpaulo } 1142281806Srpaulo } 1143346981Scy if (logptr) { 1144281806Srpaulo if (logptr->max_log > 0) 1145281806Srpaulo printf(" log logamount %d", logptr->max_log); 1146281806Srpaulo else 1147281806Srpaulo printf(" log"); 1148281806Srpaulo } 1149281806Srpaulo#ifndef NO_ALTQ 1150346981Scy if (altqptr) { 1151346981Scy print_altq_cmd(altqptr); 1152346981Scy } 1153346981Scy#endif 1154346981Scy if (tagptr) { 1155252726Srpaulo if (tagptr->len & F_NOT) 1156281806Srpaulo PRINT_UINT_ARG(" untag ", tagptr->arg1); 1157252726Srpaulo else 1158252726Srpaulo PRINT_UINT_ARG(" tag ", tagptr->arg1); 1159252726Srpaulo } 1160252726Srpaulo 1161346981Scy /* 1162281806Srpaulo * then print the body. 1163346981Scy */ 1164346981Scy for (l = rule->act_ofs, cmd = rule->cmd ; 1165252726Srpaulo l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1166346981Scy if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1167252726Srpaulo continue; 1168346981Scy if (cmd->opcode == O_IP4) { 1169346981Scy flags |= HAVE_PROTO4; 1170346981Scy break; 1171252726Srpaulo } else if (cmd->opcode == O_IP6) { 1172252726Srpaulo flags |= HAVE_PROTO6; 1173346981Scy break; 1174281806Srpaulo } 1175281806Srpaulo } 1176346981Scy if (rule->_pad & 1) { /* empty rules before options */ 1177252726Srpaulo if (!co.do_compact) { 1178346981Scy show_prerequisites(&flags, HAVE_PROTO, 0); 1179289549Srpaulo printf(" from any to any"); 1180289549Srpaulo } 1181289549Srpaulo flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1182289549Srpaulo HAVE_SRCIP | HAVE_DSTIP; 1183289549Srpaulo } 1184289549Srpaulo 1185346981Scy if (co.comment_only) 1186346981Scy comment = "..."; 1187346981Scy 1188346981Scy for (l = rule->act_ofs, cmd = rule->cmd ; 1189346981Scy l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1190346981Scy /* useful alias */ 1191346981Scy ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1192346981Scy 1193346981Scy if (co.comment_only) { 1194289549Srpaulo if (cmd->opcode != O_NOP) 1195346981Scy continue; 1196346981Scy printf(" // %s\n", (char *)(cmd + 1)); 1197346981Scy return; 1198346981Scy } 1199346981Scy 1200346981Scy show_prerequisites(&flags, 0, cmd->opcode); 1201346981Scy 1202252726Srpaulo switch(cmd->opcode) { 1203346981Scy case O_PROB: 1204252726Srpaulo break; /* done already */ 1205252726Srpaulo 1206252726Srpaulo case O_PROBE_STATE: 1207252726Srpaulo break; /* no need to print anything here */ 1208214501Srpaulo 1209214501Srpaulo case O_IP_SRC: 1210214501Srpaulo case O_IP_SRC_LOOKUP: 1211214501Srpaulo case O_IP_SRC_MASK: 1212214501Srpaulo case O_IP_SRC_ME: 1213214501Srpaulo case O_IP_SRC_SET: 1214214501Srpaulo show_prerequisites(&flags, HAVE_PROTO, 0); 1215214501Srpaulo if (!(flags & HAVE_SRCIP)) 1216214501Srpaulo printf(" from"); 1217214501Srpaulo if ((cmd->len & F_OR) && !or_block) 1218214501Srpaulo printf(" {"); 1219214501Srpaulo print_ip((ipfw_insn_ip *)cmd, 1220214501Srpaulo (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1221214501Srpaulo flags |= HAVE_SRCIP; 1222214501Srpaulo break; 1223214501Srpaulo 1224214501Srpaulo case O_IP_DST: 1225214501Srpaulo case O_IP_DST_LOOKUP: 1226214501Srpaulo case O_IP_DST_MASK: 1227214501Srpaulo case O_IP_DST_ME: 1228214501Srpaulo case O_IP_DST_SET: 1229214501Srpaulo show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1230214501Srpaulo if (!(flags & HAVE_DSTIP)) 1231252726Srpaulo printf(" to"); 1232252726Srpaulo if ((cmd->len & F_OR) && !or_block) 1233214501Srpaulo printf(" {"); 1234252726Srpaulo print_ip((ipfw_insn_ip *)cmd, 1235214501Srpaulo (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1236214501Srpaulo flags |= HAVE_DSTIP; 1237214501Srpaulo break; 1238252726Srpaulo 1239214501Srpaulo case O_IP6_SRC: 1240214501Srpaulo case O_IP6_SRC_MASK: 1241214501Srpaulo case O_IP6_SRC_ME: 1242281806Srpaulo show_prerequisites(&flags, HAVE_PROTO, 0); 1243214501Srpaulo if (!(flags & HAVE_SRCIP)) 1244214501Srpaulo printf(" from"); 1245214501Srpaulo if ((cmd->len & F_OR) && !or_block) 1246214501Srpaulo printf(" {"); 1247214501Srpaulo print_ip6((ipfw_insn_ip6 *)cmd, 1248281806Srpaulo (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1249214501Srpaulo flags |= HAVE_SRCIP | HAVE_PROTO; 1250281806Srpaulo break; 1251281806Srpaulo 1252281806Srpaulo case O_IP6_DST: 1253281806Srpaulo case O_IP6_DST_MASK: 1254289549Srpaulo case O_IP6_DST_ME: 1255281806Srpaulo show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0); 1256281806Srpaulo if (!(flags & HAVE_DSTIP)) 1257281806Srpaulo printf(" to"); 1258281806Srpaulo if ((cmd->len & F_OR) && !or_block) 1259281806Srpaulo printf(" {"); 1260281806Srpaulo print_ip6((ipfw_insn_ip6 *)cmd, 1261281806Srpaulo (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1262281806Srpaulo flags |= HAVE_DSTIP; 1263281806Srpaulo break; 1264281806Srpaulo 1265214501Srpaulo case O_FLOW6ID: 1266214501Srpaulo print_flow6id( (ipfw_insn_u32 *) cmd ); 1267214501Srpaulo flags |= HAVE_OPTIONS; 1268281806Srpaulo break; 1269214501Srpaulo 1270214501Srpaulo case O_IP_DSTPORT: 1271214501Srpaulo show_prerequisites(&flags, 1272289549Srpaulo HAVE_PROTO | HAVE_SRCIP | 1273214501Srpaulo HAVE_DSTIP | HAVE_IP, 0); 1274214501Srpaulo case O_IP_SRCPORT: 1275214501Srpaulo show_prerequisites(&flags, 1276214501Srpaulo HAVE_PROTO | HAVE_SRCIP, 0); 1277214501Srpaulo if ((cmd->len & F_OR) && !or_block) 1278214501Srpaulo printf(" {"); 1279214501Srpaulo if (cmd->len & F_NOT) 1280214501Srpaulo printf(" not"); 1281214501Srpaulo print_newports((ipfw_insn_u16 *)cmd, proto, 1282281806Srpaulo (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1283214501Srpaulo break; 1284214501Srpaulo 1285214501Srpaulo case O_PROTO: { 1286346981Scy struct protoent *pe = NULL; 1287214501Srpaulo 1288214501Srpaulo if ((cmd->len & F_OR) && !or_block) 1289214501Srpaulo printf(" {"); 1290214501Srpaulo if (cmd->len & F_NOT) 1291214501Srpaulo printf(" not"); 1292289549Srpaulo proto = cmd->arg1; 1293281806Srpaulo pe = getprotobynumber(cmd->arg1); 1294281806Srpaulo if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1295281806Srpaulo !(flags & HAVE_PROTO)) 1296281806Srpaulo show_prerequisites(&flags, 1297281806Srpaulo HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1298281806Srpaulo HAVE_DSTIP | HAVE_OPTIONS, 0); 1299281806Srpaulo if (flags & HAVE_OPTIONS) 1300281806Srpaulo printf(" proto"); 1301281806Srpaulo if (pe) 1302281806Srpaulo printf(" %s", pe->p_name); 1303281806Srpaulo else 1304281806Srpaulo printf(" %u", cmd->arg1); 1305214501Srpaulo } 1306281806Srpaulo flags |= HAVE_PROTO; 1307281806Srpaulo break; 1308252726Srpaulo 1309252726Srpaulo default: /*options ... */ 1310214501Srpaulo if (!(cmd->len & (F_OR|F_NOT))) 1311281806Srpaulo if (((cmd->opcode == O_IP6) && 1312252726Srpaulo (flags & HAVE_PROTO6)) || 1313252726Srpaulo ((cmd->opcode == O_IP4) && 1314252726Srpaulo (flags & HAVE_PROTO4))) 1315214501Srpaulo break; 1316214501Srpaulo show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP | 1317214501Srpaulo HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1318214501Srpaulo if ((cmd->len & F_OR) && !or_block) 1319337817Scy printf(" {"); 1320289549Srpaulo if (cmd->len & F_NOT && cmd->opcode != O_IN) 1321214501Srpaulo printf(" not"); 1322214501Srpaulo switch(cmd->opcode) { 1323337817Scy case O_MACADDR2: { 1324214501Srpaulo ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1325337817Scy 1326337817Scy printf(" MAC"); 1327337817Scy print_mac(m->addr, m->mask); 1328337817Scy print_mac(m->addr + 6, m->mask + 6); 1329337817Scy } 1330337817Scy break; 1331337817Scy 1332337817Scy case O_MAC_TYPE: 1333337817Scy print_newports((ipfw_insn_u16 *)cmd, 1334337817Scy IPPROTO_ETHERTYPE, cmd->opcode); 1335337817Scy break; 1336337817Scy 1337214501Srpaulo 1338214501Srpaulo case O_FRAG: 1339214501Srpaulo printf(" frag"); 1340214501Srpaulo break; 1341214501Srpaulo 1342214501Srpaulo case O_FIB: 1343214501Srpaulo printf(" fib %u", cmd->arg1 ); 1344214501Srpaulo break; 1345214501Srpaulo case O_SOCKARG: 1346289549Srpaulo printf(" sockarg"); 1347214501Srpaulo break; 1348214501Srpaulo 1349214501Srpaulo case O_IN: 1350214501Srpaulo printf(cmd->len & F_NOT ? " out" : " in"); 1351214501Srpaulo break; 1352214501Srpaulo 1353214501Srpaulo case O_DIVERTED: 1354214501Srpaulo switch (cmd->arg1) { 1355214501Srpaulo case 3: 1356214501Srpaulo printf(" diverted"); 1357214501Srpaulo break; 1358214501Srpaulo case 1: 1359214501Srpaulo printf(" diverted-loopback"); 1360214501Srpaulo break; 1361214501Srpaulo case 2: 1362214501Srpaulo printf(" diverted-output"); 1363214501Srpaulo break; 1364214501Srpaulo default: 1365214501Srpaulo printf(" diverted-?<%u>", cmd->arg1); 1366214501Srpaulo break; 1367214501Srpaulo } 1368214501Srpaulo break; 1369252726Srpaulo 1370214501Srpaulo case O_LAYER2: 1371214501Srpaulo printf(" layer2"); 1372214501Srpaulo break; 1373289549Srpaulo case O_XMIT: 1374289549Srpaulo case O_RECV: 1375289549Srpaulo case O_VIA: 1376289549Srpaulo { 1377214501Srpaulo char const *s; 1378214501Srpaulo ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1379214501Srpaulo 1380214501Srpaulo if (cmd->opcode == O_XMIT) 1381214501Srpaulo s = "xmit"; 1382214501Srpaulo else if (cmd->opcode == O_RECV) 1383337817Scy s = "recv"; 1384214501Srpaulo else /* if (cmd->opcode == O_VIA) */ 1385337817Scy s = "via"; 1386281806Srpaulo if (cmdif->name[0] == '\0') 1387281806Srpaulo printf(" %s %s", s, 1388281806Srpaulo inet_ntoa(cmdif->p.ip)); 1389281806Srpaulo else 1390281806Srpaulo printf(" %s %s", s, cmdif->name); 1391281806Srpaulo 1392281806Srpaulo break; 1393281806Srpaulo } 1394281806Srpaulo case O_IPID: 1395281806Srpaulo if (F_LEN(cmd) == 1) 1396281806Srpaulo printf(" ipid %u", cmd->arg1 ); 1397281806Srpaulo else 1398281806Srpaulo print_newports((ipfw_insn_u16 *)cmd, 0, 1399281806Srpaulo O_IPID); 1400281806Srpaulo break; 1401281806Srpaulo 1402281806Srpaulo case O_IPTTL: 1403281806Srpaulo if (F_LEN(cmd) == 1) 1404281806Srpaulo printf(" ipttl %u", cmd->arg1 ); 1405281806Srpaulo else 1406281806Srpaulo print_newports((ipfw_insn_u16 *)cmd, 0, 1407281806Srpaulo O_IPTTL); 1408281806Srpaulo break; 1409281806Srpaulo 1410281806Srpaulo case O_IPVER: 1411281806Srpaulo printf(" ipver %u", cmd->arg1 ); 1412281806Srpaulo break; 1413281806Srpaulo 1414281806Srpaulo case O_IPPRECEDENCE: 1415281806Srpaulo printf(" ipprecedence %u", (cmd->arg1) >> 5 ); 1416281806Srpaulo break; 1417281806Srpaulo 1418281806Srpaulo case O_IPLEN: 1419281806Srpaulo if (F_LEN(cmd) == 1) 1420281806Srpaulo printf(" iplen %u", cmd->arg1 ); 1421281806Srpaulo else 1422281806Srpaulo print_newports((ipfw_insn_u16 *)cmd, 0, 1423281806Srpaulo O_IPLEN); 1424281806Srpaulo break; 1425281806Srpaulo 1426281806Srpaulo case O_IPOPT: 1427281806Srpaulo print_flags("ipoptions", cmd, f_ipopts); 1428281806Srpaulo break; 1429281806Srpaulo 1430281806Srpaulo case O_IPTOS: 1431281806Srpaulo print_flags("iptos", cmd, f_iptos); 1432281806Srpaulo break; 1433281806Srpaulo 1434281806Srpaulo case O_ICMPTYPE: 1435281806Srpaulo print_icmptypes((ipfw_insn_u32 *)cmd); 1436289549Srpaulo break; 1437289549Srpaulo 1438281806Srpaulo case O_ESTAB: 1439281806Srpaulo printf(" established"); 1440281806Srpaulo break; 1441281806Srpaulo 1442281806Srpaulo case O_TCPDATALEN: 1443281806Srpaulo if (F_LEN(cmd) == 1) 1444281806Srpaulo printf(" tcpdatalen %u", cmd->arg1 ); 1445281806Srpaulo else 1446281806Srpaulo print_newports((ipfw_insn_u16 *)cmd, 0, 1447281806Srpaulo O_TCPDATALEN); 1448281806Srpaulo break; 1449281806Srpaulo 1450281806Srpaulo case O_TCPFLAGS: 1451281806Srpaulo print_flags("tcpflags", cmd, f_tcpflags); 1452281806Srpaulo break; 1453281806Srpaulo 1454281806Srpaulo case O_TCPOPTS: 1455281806Srpaulo print_flags("tcpoptions", cmd, f_tcpopts); 1456281806Srpaulo break; 1457337817Scy 1458337817Scy case O_TCPWIN: 1459281806Srpaulo printf(" tcpwin %d", ntohs(cmd->arg1)); 1460281806Srpaulo break; 1461281806Srpaulo 1462281806Srpaulo case O_TCPACK: 1463281806Srpaulo printf(" tcpack %d", ntohl(cmd32->d[0])); 1464281806Srpaulo break; 1465281806Srpaulo 1466281806Srpaulo case O_TCPSEQ: 1467281806Srpaulo printf(" tcpseq %d", ntohl(cmd32->d[0])); 1468281806Srpaulo break; 1469281806Srpaulo 1470281806Srpaulo case O_UID: 1471281806Srpaulo { 1472281806Srpaulo struct passwd *pwd = getpwuid(cmd32->d[0]); 1473281806Srpaulo 1474281806Srpaulo if (pwd) 1475281806Srpaulo printf(" uid %s", pwd->pw_name); 1476281806Srpaulo else 1477281806Srpaulo printf(" uid %u", cmd32->d[0]); 1478281806Srpaulo } 1479281806Srpaulo break; 1480281806Srpaulo 1481281806Srpaulo case O_GID: 1482281806Srpaulo { 1483281806Srpaulo struct group *grp = getgrgid(cmd32->d[0]); 1484281806Srpaulo 1485281806Srpaulo if (grp) 1486281806Srpaulo printf(" gid %s", grp->gr_name); 1487281806Srpaulo else 1488281806Srpaulo printf(" gid %u", cmd32->d[0]); 1489281806Srpaulo } 1490281806Srpaulo break; 1491337817Scy 1492281806Srpaulo case O_JAIL: 1493281806Srpaulo printf(" jail %d", cmd32->d[0]); 1494281806Srpaulo break; 1495281806Srpaulo 1496281806Srpaulo case O_VERREVPATH: 1497281806Srpaulo printf(" verrevpath"); 1498281806Srpaulo break; 1499281806Srpaulo 1500281806Srpaulo case O_VERSRCREACH: 1501281806Srpaulo printf(" versrcreach"); 1502281806Srpaulo break; 1503281806Srpaulo 1504281806Srpaulo case O_ANTISPOOF: 1505281806Srpaulo printf(" antispoof"); 1506281806Srpaulo break; 1507281806Srpaulo 1508281806Srpaulo case O_IPSEC: 1509281806Srpaulo printf(" ipsec"); 1510281806Srpaulo break; 1511281806Srpaulo 1512281806Srpaulo case O_NOP: 1513281806Srpaulo comment = (char *)(cmd + 1); 1514281806Srpaulo break; 1515281806Srpaulo 1516281806Srpaulo case O_KEEP_STATE: 1517281806Srpaulo printf(" keep-state"); 1518346981Scy break; 1519346981Scy 1520346981Scy case O_LIMIT: { 1521346981Scy struct _s_x *p = limit_masks; 1522346981Scy ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 1523346981Scy uint8_t x = c->limit_mask; 1524346981Scy char const *comma = " "; 1525346981Scy 1526346981Scy printf(" limit"); 1527346981Scy for (; p->x != 0 ; p++) 1528281806Srpaulo if ((x & p->x) == p->x) { 1529281806Srpaulo x &= ~p->x; 1530281806Srpaulo printf("%s%s", comma, p->s); 1531281806Srpaulo comma = ","; 1532281806Srpaulo } 1533281806Srpaulo PRINT_UINT_ARG(" ", c->conn_limit); 1534281806Srpaulo break; 1535281806Srpaulo } 1536281806Srpaulo 1537281806Srpaulo case O_IP6: 1538281806Srpaulo printf(" ip6"); 1539281806Srpaulo break; 1540281806Srpaulo 1541281806Srpaulo case O_IP4: 1542281806Srpaulo printf(" ip4"); 1543281806Srpaulo break; 1544281806Srpaulo 1545281806Srpaulo case O_ICMP6TYPE: 1546281806Srpaulo print_icmp6types((ipfw_insn_u32 *)cmd); 1547281806Srpaulo break; 1548281806Srpaulo 1549281806Srpaulo case O_EXT_HDR: 1550281806Srpaulo print_ext6hdr( (ipfw_insn *) cmd ); 1551281806Srpaulo break; 1552281806Srpaulo 1553281806Srpaulo case O_TAGGED: 1554281806Srpaulo if (F_LEN(cmd) == 1) 1555281806Srpaulo PRINT_UINT_ARG(" tagged ", cmd->arg1); 1556281806Srpaulo else 1557281806Srpaulo print_newports((ipfw_insn_u16 *)cmd, 0, 1558281806Srpaulo O_TAGGED); 1559281806Srpaulo break; 1560281806Srpaulo 1561281806Srpaulo default: 1562281806Srpaulo printf(" [opcode %d len %d]", 1563281806Srpaulo cmd->opcode, cmd->len); 1564281806Srpaulo } 1565281806Srpaulo } 1566281806Srpaulo if (cmd->len & F_OR) { 1567281806Srpaulo printf(" or"); 1568281806Srpaulo or_block = 1; 1569281806Srpaulo } else if (or_block) { 1570346981Scy printf(" }"); 1571346981Scy or_block = 0; 1572346981Scy } 1573346981Scy } 1574346981Scy show_prerequisites(&flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 1575346981Scy | HAVE_IP, 0); 1576346981Scy if (comment) 1577346981Scy printf(" // %s", comment); 1578346981Scy printf("\n"); 1579346981Scy} 1580346981Scy 1581346981Scystatic void 1582346981Scyshow_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth) 1583346981Scy{ 1584346981Scy struct protoent *pe; 1585346981Scy struct in_addr a; 1586346981Scy uint16_t rulenum; 1587346981Scy char buf[INET6_ADDRSTRLEN]; 1588346981Scy 1589346981Scy if (!co.do_expired) { 1590346981Scy if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 1591346981Scy return; 1592351611Scy } 1593351611Scy bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1594351611Scy printf("%05d", rulenum); 1595351611Scy if (pcwidth > 0 || bcwidth > 0) { 1596351611Scy printf(" "); 1597351611Scy pr_u64(&d->pcnt, pcwidth); 1598351611Scy pr_u64(&d->bcnt, bcwidth); 1599351611Scy printf("(%ds)", d->expire); 1600351611Scy } 1601351611Scy switch (d->dyn_type) { 1602351611Scy case O_LIMIT_PARENT: 1603351611Scy printf(" PARENT %d", d->count); 1604351611Scy break; 1605351611Scy case O_LIMIT: 1606351611Scy printf(" LIMIT"); 1607351611Scy break; 1608351611Scy case O_KEEP_STATE: /* bidir, no mask */ 1609351611Scy printf(" STATE"); 1610351611Scy break; 1611351611Scy } 1612351611Scy 1613351611Scy if ((pe = getprotobynumber(d->id.proto)) != NULL) 1614351611Scy printf(" %s", pe->p_name); 1615351611Scy else 1616351611Scy printf(" proto %u", d->id.proto); 1617351611Scy 1618351611Scy if (d->id.addr_type == 4) { 1619351611Scy a.s_addr = htonl(d->id.src_ip); 1620351611Scy printf(" %s %d", inet_ntoa(a), d->id.src_port); 1621351611Scy 1622351611Scy a.s_addr = htonl(d->id.dst_ip); 1623351611Scy printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port); 1624351611Scy } else if (d->id.addr_type == 6) { 1625351611Scy printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 1626351611Scy sizeof(buf)), d->id.src_port); 1627351611Scy printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf, 1628351611Scy sizeof(buf)), d->id.dst_port); 1629351611Scy } else 1630351611Scy printf(" UNKNOWN <-> UNKNOWN\n"); 1631351611Scy 1632351611Scy printf("\n"); 1633351611Scy} 1634351611Scy 1635351611Scy/* 1636351611Scy * This one handles all set-related commands 1637351611Scy * ipfw set { show | enable | disable } 1638351611Scy * ipfw set swap X Y 1639351611Scy * ipfw set move X to Y 1640351611Scy * ipfw set move rule X to Y 1641351611Scy */ 1642351611Scyvoid 1643351611Scyipfw_sets_handler(char *av[]) 1644351611Scy{ 1645351611Scy uint32_t set_disable, masks[2]; 1646351611Scy int i, nbytes; 1647351611Scy uint16_t rulenum; 1648351611Scy uint8_t cmd, new_set; 1649351611Scy 1650351611Scy av++; 1651351611Scy 1652351611Scy if (av[0] == NULL) 1653351611Scy errx(EX_USAGE, "set needs command"); 1654351611Scy if (_substrcmp(*av, "show") == 0) { 1655351611Scy void *data = NULL; 1656351611Scy char const *msg; 1657351611Scy int nalloc; 1658351611Scy 1659214501Srpaulo nalloc = nbytes = sizeof(struct ip_fw); 1660214501Srpaulo while (nbytes >= nalloc) { 1661214501Srpaulo if (data) 1662214501Srpaulo free(data); 1663252726Srpaulo nalloc = nalloc * 2 + 200; 1664252726Srpaulo nbytes = nalloc; 1665214501Srpaulo data = safe_calloc(1, nbytes); 1666252726Srpaulo if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0) 1667252726Srpaulo err(EX_OSERR, "getsockopt(IP_FW_GET)"); 1668252726Srpaulo } 1669252726Srpaulo 1670289549Srpaulo bcopy(&((struct ip_fw *)data)->next_rule, 1671252726Srpaulo &set_disable, sizeof(set_disable)); 1672252726Srpaulo 1673252726Srpaulo for (i = 0, msg = "disable" ; i < RESVD_SET; i++) 1674252726Srpaulo if ((set_disable & (1<<i))) { 1675252726Srpaulo printf("%s %d", msg, i); 1676281806Srpaulo msg = ""; 1677281806Srpaulo } 1678281806Srpaulo msg = (set_disable) ? " enable" : "enable"; 1679252726Srpaulo for (i = 0; i < RESVD_SET; i++) 1680252726Srpaulo if (!(set_disable & (1<<i))) { 1681252726Srpaulo printf("%s %d", msg, i); 1682252726Srpaulo msg = ""; 1683252726Srpaulo } 1684252726Srpaulo printf("\n"); 1685214501Srpaulo } else if (_substrcmp(*av, "swap") == 0) { 1686214501Srpaulo av++; 1687214501Srpaulo if ( av[0] == NULL || av[1] == NULL ) 1688214501Srpaulo errx(EX_USAGE, "set swap needs 2 set numbers\n"); 1689214501Srpaulo rulenum = atoi(av[0]); 1690214501Srpaulo new_set = atoi(av[1]); 1691214501Srpaulo if (!isdigit(*(av[0])) || rulenum > RESVD_SET) 1692214501Srpaulo errx(EX_DATAERR, "invalid set number %s\n", av[0]); 1693214501Srpaulo if (!isdigit(*(av[1])) || new_set > RESVD_SET) 1694252726Srpaulo errx(EX_DATAERR, "invalid set number %s\n", av[1]); 1695214501Srpaulo masks[0] = (4 << 24) | (new_set << 16) | (rulenum); 1696214501Srpaulo i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 1697214501Srpaulo } else if (_substrcmp(*av, "move") == 0) { 1698214501Srpaulo av++; 1699214501Srpaulo if (av[0] && _substrcmp(*av, "rule") == 0) { 1700214501Srpaulo cmd = 2; 1701214501Srpaulo av++; 1702214501Srpaulo } else 1703214501Srpaulo cmd = 3; 1704214501Srpaulo if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 1705214501Srpaulo av[3] != NULL || _substrcmp(av[1], "to") != 0) 1706214501Srpaulo errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 1707214501Srpaulo rulenum = atoi(av[0]); 1708214501Srpaulo new_set = atoi(av[2]); 1709214501Srpaulo if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) || 1710214501Srpaulo (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) ) 1711214501Srpaulo errx(EX_DATAERR, "invalid source number %s\n", av[0]); 1712214501Srpaulo if (!isdigit(*(av[2])) || new_set > RESVD_SET) 1713252726Srpaulo errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 1714252726Srpaulo masks[0] = (cmd << 24) | (new_set << 16) | (rulenum); 1715252726Srpaulo i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t)); 1716252726Srpaulo } else if (_substrcmp(*av, "disable") == 0 || 1717252726Srpaulo _substrcmp(*av, "enable") == 0 ) { 1718252726Srpaulo int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 1719252726Srpaulo 1720252726Srpaulo av++; 1721252726Srpaulo masks[0] = masks[1] = 0; 1722214501Srpaulo 1723252726Srpaulo while (av[0]) { 1724252726Srpaulo if (isdigit(**av)) { 1725252726Srpaulo i = atoi(*av); 1726214501Srpaulo if (i < 0 || i > RESVD_SET) 1727281806Srpaulo errx(EX_DATAERR, 1728214501Srpaulo "invalid set number %d\n", i); 1729281806Srpaulo masks[which] |= (1<<i); 1730281806Srpaulo } else if (_substrcmp(*av, "disable") == 0) 1731281806Srpaulo which = 0; 1732346981Scy else if (_substrcmp(*av, "enable") == 0) 1733346981Scy which = 1; 1734346981Scy else 1735281806Srpaulo errx(EX_DATAERR, 1736214501Srpaulo "invalid set command %s\n", *av); 1737214501Srpaulo av++; 1738252726Srpaulo } 1739252726Srpaulo if ( (masks[0] & masks[1]) != 0 ) 1740252726Srpaulo errx(EX_DATAERR, 1741214501Srpaulo "cannot enable and disable the same set\n"); 1742252726Srpaulo 1743252726Srpaulo i = do_cmd(IP_FW_DEL, masks, sizeof(masks)); 1744214501Srpaulo if (i) 1745252726Srpaulo warn("set enable/disable: setsockopt(IP_FW_DEL)"); 1746252726Srpaulo } else 1747214501Srpaulo errx(EX_USAGE, "invalid set command %s\n", *av); 1748214501Srpaulo} 1749214501Srpaulo 1750214501Srpaulovoid 1751214501Srpauloipfw_sysctl_handler(char *av[], int which) 1752214501Srpaulo{ 1753214501Srpaulo av++; 1754214501Srpaulo 1755214501Srpaulo if (av[0] == NULL) { 1756214501Srpaulo warnx("missing keyword to enable/disable\n"); 1757281806Srpaulo } else if (_substrcmp(*av, "firewall") == 0) { 1758281806Srpaulo sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 1759214501Srpaulo &which, sizeof(which)); 1760214501Srpaulo sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 1761252726Srpaulo &which, sizeof(which)); 1762252726Srpaulo } else if (_substrcmp(*av, "one_pass") == 0) { 1763214501Srpaulo sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 1764351611Scy &which, sizeof(which)); 1765351611Scy } else if (_substrcmp(*av, "debug") == 0) { 1766351611Scy sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 1767351611Scy &which, sizeof(which)); 1768351611Scy } else if (_substrcmp(*av, "verbose") == 0) { 1769351611Scy sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 1770351611Scy &which, sizeof(which)); 1771351611Scy } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 1772351611Scy sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 1773214501Srpaulo &which, sizeof(which)); 1774214501Srpaulo#ifndef NO_ALTQ 1775214501Srpaulo } else if (_substrcmp(*av, "altq") == 0) { 1776214501Srpaulo altq_set_enabled(which); 1777214501Srpaulo#endif 1778214501Srpaulo } else { 1779214501Srpaulo warnx("unrecognize enable/disable keyword: %s\n", *av); 1780214501Srpaulo } 1781252726Srpaulo} 1782252726Srpaulo 1783252726Srpaulovoid 1784252726Srpauloipfw_list(int ac, char *av[], int show_counters) 1785252726Srpaulo{ 1786252726Srpaulo struct ip_fw *r; 1787252726Srpaulo ipfw_dyn_rule *dynrules, *d; 1788252726Srpaulo 1789351611Scy#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r))) 1790252726Srpaulo char *lim; 1791252726Srpaulo void *data = NULL; 1792252726Srpaulo int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width; 1793252726Srpaulo int exitval = EX_OK; 1794252726Srpaulo int lac; 1795281806Srpaulo char **lav; 1796281806Srpaulo u_long rnum, last; 1797281806Srpaulo char *endptr; 1798351611Scy int seen = 0; 1799351611Scy uint8_t set; 1800252726Srpaulo 1801281806Srpaulo const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET; 1802281806Srpaulo int nalloc = 1024; /* start somewhere... */ 1803281806Srpaulo 1804281806Srpaulo last = 0; 1805281806Srpaulo 1806281806Srpaulo if (co.test_only) { 1807281806Srpaulo fprintf(stderr, "Testing only, list disabled\n"); 1808281806Srpaulo return; 1809337817Scy } 1810281806Srpaulo if (co.do_pipe) { 1811281806Srpaulo dummynet_list(ac, av, show_counters); 1812281806Srpaulo return; 1813281806Srpaulo } 1814281806Srpaulo 1815281806Srpaulo ac--; 1816281806Srpaulo av++; 1817281806Srpaulo 1818281806Srpaulo /* get rules or pipes from kernel, resizing array as necessary */ 1819281806Srpaulo nbytes = nalloc; 1820346981Scy 1821346981Scy while (nbytes >= nalloc) { 1822346981Scy nalloc = nalloc * 2 + 200; 1823346981Scy nbytes = nalloc; 1824346981Scy data = safe_realloc(data, nbytes); 1825281806Srpaulo if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0) 1826281806Srpaulo err(EX_OSERR, "getsockopt(IP_%s_GET)", 1827281806Srpaulo co.do_pipe ? "DUMMYNET" : "FW"); 1828281806Srpaulo } 1829281806Srpaulo 1830281806Srpaulo /* 1831281806Srpaulo * Count static rules. They have variable size so we 1832281806Srpaulo * need to scan the list to count them. 1833281806Srpaulo */ 1834281806Srpaulo for (nstat = 1, r = data, lim = (char *)data + nbytes; 1835281806Srpaulo r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim; 1836281806Srpaulo ++nstat, r = NEXT(r) ) 1837281806Srpaulo ; /* nothing */ 1838281806Srpaulo 1839281806Srpaulo /* 1840281806Srpaulo * Count dynamic rules. This is easier as they have 1841281806Srpaulo * fixed size. 1842281806Srpaulo */ 1843281806Srpaulo r = NEXT(r); 1844281806Srpaulo dynrules = (ipfw_dyn_rule *)r ; 1845281806Srpaulo n = (char *)r - (char *)data; 1846281806Srpaulo ndyn = (nbytes - n) / sizeof *dynrules; 1847281806Srpaulo 1848281806Srpaulo /* if showing stats, figure out column widths ahead of time */ 1849281806Srpaulo bcwidth = pcwidth = 0; 1850281806Srpaulo if (show_counters) { 1851281806Srpaulo for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 1852281806Srpaulo /* skip rules from another set */ 1853281806Srpaulo if (co.use_set && r->set != co.use_set - 1) 1854281806Srpaulo continue; 1855281806Srpaulo 1856281806Srpaulo /* packet counter */ 1857281806Srpaulo width = pr_u64(&r->pcnt, 0); 1858281806Srpaulo if (width > pcwidth) 1859281806Srpaulo pcwidth = width; 1860281806Srpaulo 1861281806Srpaulo /* byte counter */ 1862346981Scy width = pr_u64(&r->bcnt, 0); 1863346981Scy if (width > bcwidth) 1864346981Scy bcwidth = width; 1865346981Scy } 1866281806Srpaulo } 1867281806Srpaulo if (co.do_dynamic && ndyn) { 1868346981Scy for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1869346981Scy if (co.use_set) { 1870346981Scy /* skip rules from another set */ 1871346981Scy bcopy((char *)&d->rule + sizeof(uint16_t), 1872346981Scy &set, sizeof(uint8_t)); 1873281806Srpaulo if (set != co.use_set - 1) 1874281806Srpaulo continue; 1875281806Srpaulo } 1876281806Srpaulo width = pr_u64(&d->pcnt, 0); 1877281806Srpaulo if (width > pcwidth) 1878281806Srpaulo pcwidth = width; 1879281806Srpaulo 1880281806Srpaulo width = pr_u64(&d->bcnt, 0); 1881281806Srpaulo if (width > bcwidth) 1882289549Srpaulo bcwidth = width; 1883289549Srpaulo } 1884281806Srpaulo } 1885281806Srpaulo /* if no rule numbers were specified, list all rules */ 1886346981Scy if (ac == 0) { 1887346981Scy for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) { 1888346981Scy if (co.use_set && r->set != co.use_set - 1) 1889346981Scy continue; 1890346981Scy show_ipfw(r, pcwidth, bcwidth); 1891346981Scy } 1892346981Scy 1893346981Scy if (co.do_dynamic && ndyn) { 1894346981Scy printf("## Dynamic rules (%d):\n", ndyn); 1895346981Scy for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1896346981Scy if (co.use_set) { 1897346981Scy bcopy((char *)&d->rule + sizeof(uint16_t), 1898214501Srpaulo &set, sizeof(uint8_t)); 1899214501Srpaulo if (set != co.use_set - 1) 1900214501Srpaulo continue; 1901214501Srpaulo } 1902214501Srpaulo show_dyn_ipfw(d, pcwidth, bcwidth); 1903214501Srpaulo } 1904337817Scy } 1905337817Scy goto done; 1906337817Scy } 1907337817Scy 1908337817Scy /* display specific rules requested on command line */ 1909337817Scy 1910337817Scy for (lac = ac, lav = av; lac != 0; lac--) { 1911337817Scy /* convert command line rule # */ 1912337817Scy last = rnum = strtoul(*lav++, &endptr, 10); 1913337817Scy if (*endptr == '-') 1914337817Scy last = strtoul(endptr+1, &endptr, 10); 1915337817Scy if (*endptr) { 1916337817Scy exitval = EX_USAGE; 1917337817Scy warnx("invalid rule number: %s", *(lav - 1)); 1918337817Scy continue; 1919337817Scy } 1920337817Scy for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) { 1921337817Scy if (r->rulenum > last) 1922337817Scy break; 1923337817Scy if (co.use_set && r->set != co.use_set - 1) 1924337817Scy continue; 1925337817Scy if (r->rulenum >= rnum && r->rulenum <= last) { 1926337817Scy show_ipfw(r, pcwidth, bcwidth); 1927337817Scy seen = 1; 1928337817Scy } 1929337817Scy } 1930337817Scy if (!seen) { 1931214501Srpaulo /* give precedence to other error(s) */ 1932 if (exitval == EX_OK) 1933 exitval = EX_UNAVAILABLE; 1934 warnx("rule %lu does not exist", rnum); 1935 } 1936 } 1937 1938 if (co.do_dynamic && ndyn) { 1939 printf("## Dynamic rules:\n"); 1940 for (lac = ac, lav = av; lac != 0; lac--) { 1941 last = rnum = strtoul(*lav++, &endptr, 10); 1942 if (*endptr == '-') 1943 last = strtoul(endptr+1, &endptr, 10); 1944 if (*endptr) 1945 /* already warned */ 1946 continue; 1947 for (n = 0, d = dynrules; n < ndyn; n++, d++) { 1948 uint16_t rulenum; 1949 1950 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 1951 if (rulenum > rnum) 1952 break; 1953 if (co.use_set) { 1954 bcopy((char *)&d->rule + sizeof(uint16_t), 1955 &set, sizeof(uint8_t)); 1956 if (set != co.use_set - 1) 1957 continue; 1958 } 1959 if (r->rulenum >= rnum && r->rulenum <= last) 1960 show_dyn_ipfw(d, pcwidth, bcwidth); 1961 } 1962 } 1963 } 1964 1965 ac = 0; 1966 1967done: 1968 free(data); 1969 1970 if (exitval != EX_OK) 1971 exit(exitval); 1972#undef NEXT 1973} 1974 1975static int 1976lookup_host (char *host, struct in_addr *ipaddr) 1977{ 1978 struct hostent *he; 1979 1980 if (!inet_aton(host, ipaddr)) { 1981 if ((he = gethostbyname(host)) == NULL) 1982 return(-1); 1983 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 1984 } 1985 return(0); 1986} 1987 1988/* 1989 * fills the addr and mask fields in the instruction as appropriate from av. 1990 * Update length as appropriate. 1991 * The following formats are allowed: 1992 * me returns O_IP_*_ME 1993 * 1.2.3.4 single IP address 1994 * 1.2.3.4:5.6.7.8 address:mask 1995 * 1.2.3.4/24 address/mask 1996 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 1997 * We can have multiple comma-separated address/mask entries. 1998 */ 1999static void 2000fill_ip(ipfw_insn_ip *cmd, char *av) 2001{ 2002 int len = 0; 2003 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2004 2005 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2006 2007 if (_substrcmp(av, "any") == 0) 2008 return; 2009 2010 if (_substrcmp(av, "me") == 0) { 2011 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2012 return; 2013 } 2014 2015 if (strncmp(av, "table(", 6) == 0) { 2016 char *p = strchr(av + 6, ','); 2017 2018 if (p) 2019 *p++ = '\0'; 2020 cmd->o.opcode = O_IP_DST_LOOKUP; 2021 cmd->o.arg1 = strtoul(av + 6, NULL, 0); 2022 if (p) { 2023 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2024 d[0] = strtoul(p, NULL, 0); 2025 } else 2026 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2027 return; 2028 } 2029 2030 while (av) { 2031 /* 2032 * After the address we can have '/' or ':' indicating a mask, 2033 * ',' indicating another address follows, '{' indicating a 2034 * set of addresses of unspecified size. 2035 */ 2036 char *t = NULL, *p = strpbrk(av, "/:,{"); 2037 int masklen; 2038 char md, nd = '\0'; 2039 2040 if (p) { 2041 md = *p; 2042 *p++ = '\0'; 2043 if ((t = strpbrk(p, ",{")) != NULL) { 2044 nd = *t; 2045 *t = '\0'; 2046 } 2047 } else 2048 md = '\0'; 2049 2050 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2051 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2052 switch (md) { 2053 case ':': 2054 if (!inet_aton(p, (struct in_addr *)&d[1])) 2055 errx(EX_DATAERR, "bad netmask ``%s''", p); 2056 break; 2057 case '/': 2058 masklen = atoi(p); 2059 if (masklen == 0) 2060 d[1] = htonl(0); /* mask */ 2061 else if (masklen > 32) 2062 errx(EX_DATAERR, "bad width ``%s''", p); 2063 else 2064 d[1] = htonl(~0 << (32 - masklen)); 2065 break; 2066 case '{': /* no mask, assume /24 and put back the '{' */ 2067 d[1] = htonl(~0 << (32 - 24)); 2068 *(--p) = md; 2069 break; 2070 2071 case ',': /* single address plus continuation */ 2072 *(--p) = md; 2073 /* FALLTHROUGH */ 2074 case 0: /* initialization value */ 2075 default: 2076 d[1] = htonl(~0); /* force /32 */ 2077 break; 2078 } 2079 d[0] &= d[1]; /* mask base address with mask */ 2080 if (t) 2081 *t = nd; 2082 /* find next separator */ 2083 if (p) 2084 p = strpbrk(p, ",{"); 2085 if (p && *p == '{') { 2086 /* 2087 * We have a set of addresses. They are stored as follows: 2088 * arg1 is the set size (powers of 2, 2..256) 2089 * addr is the base address IN HOST FORMAT 2090 * mask.. is an array of arg1 bits (rounded up to 2091 * the next multiple of 32) with bits set 2092 * for each host in the map. 2093 */ 2094 uint32_t *map = (uint32_t *)&cmd->mask; 2095 int low, high; 2096 int i = contigmask((uint8_t *)&(d[1]), 32); 2097 2098 if (len > 0) 2099 errx(EX_DATAERR, "address set cannot be in a list"); 2100 if (i < 24 || i > 31) 2101 errx(EX_DATAERR, "invalid set with mask %d\n", i); 2102 cmd->o.arg1 = 1<<(32-i); /* map length */ 2103 d[0] = ntohl(d[0]); /* base addr in host format */ 2104 cmd->o.opcode = O_IP_DST_SET; /* default */ 2105 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 2106 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 2107 map[i] = 0; /* clear map */ 2108 2109 av = p + 1; 2110 low = d[0] & 0xff; 2111 high = low + cmd->o.arg1 - 1; 2112 /* 2113 * Here, i stores the previous value when we specify a range 2114 * of addresses within a mask, e.g. 45-63. i = -1 means we 2115 * have no previous value. 2116 */ 2117 i = -1; /* previous value in a range */ 2118 while (isdigit(*av)) { 2119 char *s; 2120 int a = strtol(av, &s, 0); 2121 2122 if (s == av) { /* no parameter */ 2123 if (*av != '}') 2124 errx(EX_DATAERR, "set not closed\n"); 2125 if (i != -1) 2126 errx(EX_DATAERR, "incomplete range %d-", i); 2127 break; 2128 } 2129 if (a < low || a > high) 2130 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 2131 a, low, high); 2132 a -= low; 2133 if (i == -1) /* no previous in range */ 2134 i = a; 2135 else { /* check that range is valid */ 2136 if (i > a) 2137 errx(EX_DATAERR, "invalid range %d-%d", 2138 i+low, a+low); 2139 if (*s == '-') 2140 errx(EX_DATAERR, "double '-' in range"); 2141 } 2142 for (; i <= a; i++) 2143 map[i/32] |= 1<<(i & 31); 2144 i = -1; 2145 if (*s == '-') 2146 i = a; 2147 else if (*s == '}') 2148 break; 2149 av = s+1; 2150 } 2151 return; 2152 } 2153 av = p; 2154 if (av) /* then *av must be a ',' */ 2155 av++; 2156 2157 /* Check this entry */ 2158 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 2159 /* 2160 * 'any' turns the entire list into a NOP. 2161 * 'not any' never matches, so it is removed from the 2162 * list unless it is the only item, in which case we 2163 * report an error. 2164 */ 2165 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 2166 if (av == NULL && len == 0) /* only this entry */ 2167 errx(EX_DATAERR, "not any never matches"); 2168 } 2169 /* else do nothing and skip this entry */ 2170 return; 2171 } 2172 /* A single IP can be stored in an optimized format */ 2173 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 2174 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 2175 return; 2176 } 2177 len += 2; /* two words... */ 2178 d += 2; 2179 } /* end while */ 2180 if (len + 1 > F_LEN_MASK) 2181 errx(EX_DATAERR, "address list too long"); 2182 cmd->o.len |= len+1; 2183} 2184 2185 2186/* n2mask sets n bits of the mask */ 2187void 2188n2mask(struct in6_addr *mask, int n) 2189{ 2190 static int minimask[9] = 2191 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 2192 u_char *p; 2193 2194 memset(mask, 0, sizeof(struct in6_addr)); 2195 p = (u_char *) mask; 2196 for (; n > 0; p++, n -= 8) { 2197 if (n >= 8) 2198 *p = 0xff; 2199 else 2200 *p = minimask[n]; 2201 } 2202 return; 2203} 2204 2205/* 2206 * helper function to process a set of flags and set bits in the 2207 * appropriate masks. 2208 */ 2209static void 2210fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode, 2211 struct _s_x *flags, char *p) 2212{ 2213 uint8_t set=0, clear=0; 2214 2215 while (p && *p) { 2216 char *q; /* points to the separator */ 2217 int val; 2218 uint8_t *which; /* mask we are working on */ 2219 2220 if (*p == '!') { 2221 p++; 2222 which = &clear; 2223 } else 2224 which = &set; 2225 q = strchr(p, ','); 2226 if (q) 2227 *q++ = '\0'; 2228 val = match_token(flags, p); 2229 if (val <= 0) 2230 errx(EX_DATAERR, "invalid flag %s", p); 2231 *which |= (uint8_t)val; 2232 p = q; 2233 } 2234 cmd->opcode = opcode; 2235 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 2236 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 2237} 2238 2239 2240void 2241ipfw_delete(char *av[]) 2242{ 2243 uint32_t rulenum; 2244 int i; 2245 int exitval = EX_OK; 2246 int do_set = 0; 2247 2248 av++; 2249 NEED1("missing rule specification"); 2250 if ( *av && _substrcmp(*av, "set") == 0) { 2251 /* Do not allow using the following syntax: 2252 * ipfw set N delete set M 2253 */ 2254 if (co.use_set) 2255 errx(EX_DATAERR, "invalid syntax"); 2256 do_set = 1; /* delete set */ 2257 av++; 2258 } 2259 2260 /* Rule number */ 2261 while (*av && isdigit(**av)) { 2262 i = atoi(*av); av++; 2263 if (co.do_nat) { 2264 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 2265 if (exitval) { 2266 exitval = EX_UNAVAILABLE; 2267 warn("rule %u not available", i); 2268 } 2269 } else if (co.do_pipe) { 2270 exitval = ipfw_delete_pipe(co.do_pipe, i); 2271 } else { 2272 if (co.use_set) 2273 rulenum = (i & 0xffff) | (5 << 24) | 2274 ((co.use_set - 1) << 16); 2275 else 2276 rulenum = (i & 0xffff) | (do_set << 24); 2277 i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum); 2278 if (i) { 2279 exitval = EX_UNAVAILABLE; 2280 warn("rule %u: setsockopt(IP_FW_DEL)", 2281 rulenum); 2282 } 2283 } 2284 } 2285 if (exitval != EX_OK) 2286 exit(exitval); 2287} 2288 2289 2290/* 2291 * fill the interface structure. We do not check the name as we can 2292 * create interfaces dynamically, so checking them at insert time 2293 * makes relatively little sense. 2294 * Interface names containing '*', '?', or '[' are assumed to be shell 2295 * patterns which match interfaces. 2296 */ 2297static void 2298fill_iface(ipfw_insn_if *cmd, char *arg) 2299{ 2300 cmd->name[0] = '\0'; 2301 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 2302 2303 /* Parse the interface or address */ 2304 if (strcmp(arg, "any") == 0) 2305 cmd->o.len = 0; /* effectively ignore this command */ 2306 else if (!isdigit(*arg)) { 2307 strlcpy(cmd->name, arg, sizeof(cmd->name)); 2308 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 2309 } else if (!inet_aton(arg, &cmd->p.ip)) 2310 errx(EX_DATAERR, "bad ip address ``%s''", arg); 2311} 2312 2313static void 2314get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 2315{ 2316 int i; 2317 size_t l; 2318 char *ap, *ptr, *optr; 2319 struct ether_addr *mac; 2320 const char *macset = "0123456789abcdefABCDEF:"; 2321 2322 if (strcmp(p, "any") == 0) { 2323 for (i = 0; i < ETHER_ADDR_LEN; i++) 2324 addr[i] = mask[i] = 0; 2325 return; 2326 } 2327 2328 optr = ptr = strdup(p); 2329 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 2330 l = strlen(ap); 2331 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 2332 errx(EX_DATAERR, "Incorrect MAC address"); 2333 bcopy(mac, addr, ETHER_ADDR_LEN); 2334 } else 2335 errx(EX_DATAERR, "Incorrect MAC address"); 2336 2337 if (ptr != NULL) { /* we have mask? */ 2338 if (p[ptr - optr - 1] == '/') { /* mask len */ 2339 long ml = strtol(ptr, &ap, 10); 2340 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 2341 errx(EX_DATAERR, "Incorrect mask length"); 2342 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 2343 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 2344 } else { /* mask */ 2345 l = strlen(ptr); 2346 if (strspn(ptr, macset) != l || 2347 (mac = ether_aton(ptr)) == NULL) 2348 errx(EX_DATAERR, "Incorrect mask"); 2349 bcopy(mac, mask, ETHER_ADDR_LEN); 2350 } 2351 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 2352 for (i = 0; i < ETHER_ADDR_LEN; i++) 2353 mask[i] = 0xff; 2354 } 2355 for (i = 0; i < ETHER_ADDR_LEN; i++) 2356 addr[i] &= mask[i]; 2357 2358 free(optr); 2359} 2360 2361/* 2362 * helper function, updates the pointer to cmd with the length 2363 * of the current command, and also cleans up the first word of 2364 * the new command in case it has been clobbered before. 2365 */ 2366static ipfw_insn * 2367next_cmd(ipfw_insn *cmd) 2368{ 2369 cmd += F_LEN(cmd); 2370 bzero(cmd, sizeof(*cmd)); 2371 return cmd; 2372} 2373 2374/* 2375 * Takes arguments and copies them into a comment 2376 */ 2377static void 2378fill_comment(ipfw_insn *cmd, char **av) 2379{ 2380 int i, l; 2381 char *p = (char *)(cmd + 1); 2382 2383 cmd->opcode = O_NOP; 2384 cmd->len = (cmd->len & (F_NOT | F_OR)); 2385 2386 /* Compute length of comment string. */ 2387 for (i = 0, l = 0; av[i] != NULL; i++) 2388 l += strlen(av[i]) + 1; 2389 if (l == 0) 2390 return; 2391 if (l > 84) 2392 errx(EX_DATAERR, 2393 "comment too long (max 80 chars)"); 2394 l = 1 + (l+3)/4; 2395 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 2396 for (i = 0; av[i] != NULL; i++) { 2397 strcpy(p, av[i]); 2398 p += strlen(av[i]); 2399 *p++ = ' '; 2400 } 2401 *(--p) = '\0'; 2402} 2403 2404/* 2405 * A function to fill simple commands of size 1. 2406 * Existing flags are preserved. 2407 */ 2408static void 2409fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 2410{ 2411 cmd->opcode = opcode; 2412 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 2413 cmd->arg1 = arg; 2414} 2415 2416/* 2417 * Fetch and add the MAC address and type, with masks. This generates one or 2418 * two microinstructions, and returns the pointer to the last one. 2419 */ 2420static ipfw_insn * 2421add_mac(ipfw_insn *cmd, char *av[]) 2422{ 2423 ipfw_insn_mac *mac; 2424 2425 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 2426 errx(EX_DATAERR, "MAC dst src"); 2427 2428 cmd->opcode = O_MACADDR2; 2429 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 2430 2431 mac = (ipfw_insn_mac *)cmd; 2432 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 2433 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 2434 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 2435 return cmd; 2436} 2437 2438static ipfw_insn * 2439add_mactype(ipfw_insn *cmd, char *av) 2440{ 2441 if (!av) 2442 errx(EX_DATAERR, "missing MAC type"); 2443 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 2444 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE); 2445 cmd->opcode = O_MAC_TYPE; 2446 return cmd; 2447 } else 2448 return NULL; 2449} 2450 2451static ipfw_insn * 2452add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 2453{ 2454 struct protoent *pe; 2455 char *ep; 2456 int proto; 2457 2458 proto = strtol(av, &ep, 10); 2459 if (*ep != '\0' || proto <= 0) { 2460 if ((pe = getprotobyname(av)) == NULL) 2461 return NULL; 2462 proto = pe->p_proto; 2463 } 2464 2465 fill_cmd(cmd, O_PROTO, 0, proto); 2466 *protop = proto; 2467 return cmd; 2468} 2469 2470static ipfw_insn * 2471add_proto(ipfw_insn *cmd, char *av, u_char *protop) 2472{ 2473 u_char proto = IPPROTO_IP; 2474 2475 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 2476 ; /* do not set O_IP4 nor O_IP6 */ 2477 else if (strcmp(av, "ip4") == 0) 2478 /* explicit "just IPv4" rule */ 2479 fill_cmd(cmd, O_IP4, 0, 0); 2480 else if (strcmp(av, "ip6") == 0) { 2481 /* explicit "just IPv6" rule */ 2482 proto = IPPROTO_IPV6; 2483 fill_cmd(cmd, O_IP6, 0, 0); 2484 } else 2485 return add_proto0(cmd, av, protop); 2486 2487 *protop = proto; 2488 return cmd; 2489} 2490 2491static ipfw_insn * 2492add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 2493{ 2494 u_char proto = IPPROTO_IP; 2495 2496 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 2497 ; /* do not set O_IP4 nor O_IP6 */ 2498 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 2499 /* explicit "just IPv4" rule */ 2500 fill_cmd(cmd, O_IP4, 0, 0); 2501 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 2502 /* explicit "just IPv6" rule */ 2503 proto = IPPROTO_IPV6; 2504 fill_cmd(cmd, O_IP6, 0, 0); 2505 } else 2506 return add_proto0(cmd, av, protop); 2507 2508 *protop = proto; 2509 return cmd; 2510} 2511 2512static ipfw_insn * 2513add_srcip(ipfw_insn *cmd, char *av) 2514{ 2515 fill_ip((ipfw_insn_ip *)cmd, av); 2516 if (cmd->opcode == O_IP_DST_SET) /* set */ 2517 cmd->opcode = O_IP_SRC_SET; 2518 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 2519 cmd->opcode = O_IP_SRC_LOOKUP; 2520 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2521 cmd->opcode = O_IP_SRC_ME; 2522 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2523 cmd->opcode = O_IP_SRC; 2524 else /* addr/mask */ 2525 cmd->opcode = O_IP_SRC_MASK; 2526 return cmd; 2527} 2528 2529static ipfw_insn * 2530add_dstip(ipfw_insn *cmd, char *av) 2531{ 2532 fill_ip((ipfw_insn_ip *)cmd, av); 2533 if (cmd->opcode == O_IP_DST_SET) /* set */ 2534 ; 2535 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 2536 ; 2537 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 2538 cmd->opcode = O_IP_DST_ME; 2539 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 2540 cmd->opcode = O_IP_DST; 2541 else /* addr/mask */ 2542 cmd->opcode = O_IP_DST_MASK; 2543 return cmd; 2544} 2545 2546static ipfw_insn * 2547add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode) 2548{ 2549 /* XXX "any" is trapped before. Perhaps "to" */ 2550 if (_substrcmp(av, "any") == 0) { 2551 return NULL; 2552 } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) { 2553 /* XXX todo: check that we have a protocol with ports */ 2554 cmd->opcode = opcode; 2555 return cmd; 2556 } 2557 return NULL; 2558} 2559 2560static ipfw_insn * 2561add_src(ipfw_insn *cmd, char *av, u_char proto) 2562{ 2563 struct in6_addr a; 2564 char *host, *ch; 2565 ipfw_insn *ret = NULL; 2566 2567 if ((host = strdup(av)) == NULL) 2568 return NULL; 2569 if ((ch = strrchr(host, '/')) != NULL) 2570 *ch = '\0'; 2571 2572 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 2573 inet_pton(AF_INET6, host, &a) == 1) 2574 ret = add_srcip6(cmd, av); 2575 /* XXX: should check for IPv4, not !IPv6 */ 2576 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 2577 inet_pton(AF_INET6, host, &a) != 1)) 2578 ret = add_srcip(cmd, av); 2579 if (ret == NULL && strcmp(av, "any") != 0) 2580 ret = cmd; 2581 2582 free(host); 2583 return ret; 2584} 2585 2586static ipfw_insn * 2587add_dst(ipfw_insn *cmd, char *av, u_char proto) 2588{ 2589 struct in6_addr a; 2590 char *host, *ch; 2591 ipfw_insn *ret = NULL; 2592 2593 if ((host = strdup(av)) == NULL) 2594 return NULL; 2595 if ((ch = strrchr(host, '/')) != NULL) 2596 *ch = '\0'; 2597 2598 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 2599 inet_pton(AF_INET6, host, &a) == 1) 2600 ret = add_dstip6(cmd, av); 2601 /* XXX: should check for IPv4, not !IPv6 */ 2602 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 2603 inet_pton(AF_INET6, host, &a) != 1)) 2604 ret = add_dstip(cmd, av); 2605 if (ret == NULL && strcmp(av, "any") != 0) 2606 ret = cmd; 2607 2608 free(host); 2609 return ret; 2610} 2611 2612/* 2613 * Parse arguments and assemble the microinstructions which make up a rule. 2614 * Rules are added into the 'rulebuf' and then copied in the correct order 2615 * into the actual rule. 2616 * 2617 * The syntax for a rule starts with the action, followed by 2618 * optional action parameters, and the various match patterns. 2619 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 2620 * (generated if the rule includes a keep-state option), then the 2621 * various match patterns, log/altq actions, and the actual action. 2622 * 2623 */ 2624void 2625ipfw_add(char *av[]) 2626{ 2627 /* 2628 * rules are added into the 'rulebuf' and then copied in 2629 * the correct order into the actual rule. 2630 * Some things that need to go out of order (prob, action etc.) 2631 * go into actbuf[]. 2632 */ 2633 static uint32_t rulebuf[255], actbuf[255], cmdbuf[255]; 2634 2635 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 2636 ipfw_insn *first_cmd; /* first match pattern */ 2637 2638 struct ip_fw *rule; 2639 2640 /* 2641 * various flags used to record that we entered some fields. 2642 */ 2643 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 2644 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 2645 size_t len; 2646 2647 int i; 2648 2649 int open_par = 0; /* open parenthesis ( */ 2650 2651 /* proto is here because it is used to fetch ports */ 2652 u_char proto = IPPROTO_IP; /* default protocol */ 2653 2654 double match_prob = 1; /* match probability, default is always match */ 2655 2656 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 2657 bzero(cmdbuf, sizeof(cmdbuf)); 2658 bzero(rulebuf, sizeof(rulebuf)); 2659 2660 rule = (struct ip_fw *)rulebuf; 2661 cmd = (ipfw_insn *)cmdbuf; 2662 action = (ipfw_insn *)actbuf; 2663 2664 av++; 2665 2666 /* [rule N] -- Rule number optional */ 2667 if (av[0] && isdigit(**av)) { 2668 rule->rulenum = atoi(*av); 2669 av++; 2670 } 2671 2672 /* [set N] -- set number (0..RESVD_SET), optional */ 2673 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 2674 int set = strtoul(av[1], NULL, 10); 2675 if (set < 0 || set > RESVD_SET) 2676 errx(EX_DATAERR, "illegal set %s", av[1]); 2677 rule->set = set; 2678 av += 2; 2679 } 2680 2681 /* [prob D] -- match probability, optional */ 2682 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 2683 match_prob = strtod(av[1], NULL); 2684 2685 if (match_prob <= 0 || match_prob > 1) 2686 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 2687 av += 2; 2688 } 2689 2690 /* action -- mandatory */ 2691 NEED1("missing action"); 2692 i = match_token(rule_actions, *av); 2693 av++; 2694 action->len = 1; /* default */ 2695 switch(i) { 2696 case TOK_CHECKSTATE: 2697 have_state = action; 2698 action->opcode = O_CHECK_STATE; 2699 break; 2700 2701 case TOK_ACCEPT: 2702 action->opcode = O_ACCEPT; 2703 break; 2704 2705 case TOK_DENY: 2706 action->opcode = O_DENY; 2707 action->arg1 = 0; 2708 break; 2709 2710 case TOK_REJECT: 2711 action->opcode = O_REJECT; 2712 action->arg1 = ICMP_UNREACH_HOST; 2713 break; 2714 2715 case TOK_RESET: 2716 action->opcode = O_REJECT; 2717 action->arg1 = ICMP_REJECT_RST; 2718 break; 2719 2720 case TOK_RESET6: 2721 action->opcode = O_UNREACH6; 2722 action->arg1 = ICMP6_UNREACH_RST; 2723 break; 2724 2725 case TOK_UNREACH: 2726 action->opcode = O_REJECT; 2727 NEED1("missing reject code"); 2728 fill_reject_code(&action->arg1, *av); 2729 av++; 2730 break; 2731 2732 case TOK_UNREACH6: 2733 action->opcode = O_UNREACH6; 2734 NEED1("missing unreach code"); 2735 fill_unreach6_code(&action->arg1, *av); 2736 av++; 2737 break; 2738 2739 case TOK_COUNT: 2740 action->opcode = O_COUNT; 2741 break; 2742 2743 case TOK_NAT: 2744 action->opcode = O_NAT; 2745 action->len = F_INSN_SIZE(ipfw_insn_nat); 2746 if (_substrcmp(*av, "global") == 0) { 2747 action->arg1 = 0; 2748 av++; 2749 break; 2750 } else 2751 goto chkarg; 2752 2753 case TOK_QUEUE: 2754 action->opcode = O_QUEUE; 2755 goto chkarg; 2756 case TOK_PIPE: 2757 action->opcode = O_PIPE; 2758 goto chkarg; 2759 case TOK_SKIPTO: 2760 action->opcode = O_SKIPTO; 2761 goto chkarg; 2762 case TOK_NETGRAPH: 2763 action->opcode = O_NETGRAPH; 2764 goto chkarg; 2765 case TOK_NGTEE: 2766 action->opcode = O_NGTEE; 2767 goto chkarg; 2768 case TOK_DIVERT: 2769 action->opcode = O_DIVERT; 2770 goto chkarg; 2771 case TOK_TEE: 2772 action->opcode = O_TEE; 2773chkarg: 2774 if (!av[0]) 2775 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 2776 if (isdigit(**av)) { 2777 action->arg1 = strtoul(*av, NULL, 10); 2778 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 2779 errx(EX_DATAERR, "illegal argument for %s", 2780 *(av - 1)); 2781 } else if (_substrcmp(*av, "tablearg") == 0) { 2782 action->arg1 = IP_FW_TABLEARG; 2783 } else if (i == TOK_DIVERT || i == TOK_TEE) { 2784 struct servent *s; 2785 setservent(1); 2786 s = getservbyname(av[0], "divert"); 2787 if (s != NULL) 2788 action->arg1 = ntohs(s->s_port); 2789 else 2790 errx(EX_DATAERR, "illegal divert/tee port"); 2791 } else 2792 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 2793 av++; 2794 break; 2795 2796 case TOK_FORWARD: { 2797 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 2798 char *s, *end; 2799 2800 NEED1("missing forward address[:port]"); 2801 2802 action->opcode = O_FORWARD_IP; 2803 action->len = F_INSN_SIZE(ipfw_insn_sa); 2804 2805 /* 2806 * In the kernel we assume AF_INET and use only 2807 * sin_port and sin_addr. Remember to set sin_len as 2808 * the routing code seems to use it too. 2809 */ 2810 p->sa.sin_family = AF_INET; 2811 p->sa.sin_len = sizeof(struct sockaddr_in); 2812 p->sa.sin_port = 0; 2813 /* 2814 * locate the address-port separator (':' or ',') 2815 */ 2816 s = strchr(*av, ':'); 2817 if (s == NULL) 2818 s = strchr(*av, ','); 2819 if (s != NULL) { 2820 *(s++) = '\0'; 2821 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 2822 if (s == end) 2823 errx(EX_DATAERR, 2824 "illegal forwarding port ``%s''", s); 2825 p->sa.sin_port = (u_short)i; 2826 } 2827 if (_substrcmp(*av, "tablearg") == 0) 2828 p->sa.sin_addr.s_addr = INADDR_ANY; 2829 else 2830 lookup_host(*av, &(p->sa.sin_addr)); 2831 av++; 2832 break; 2833 } 2834 case TOK_COMMENT: 2835 /* pretend it is a 'count' rule followed by the comment */ 2836 action->opcode = O_COUNT; 2837 av--; /* go back... */ 2838 break; 2839 2840 case TOK_SETFIB: 2841 { 2842 int numfibs; 2843 size_t intsize = sizeof(int); 2844 2845 action->opcode = O_SETFIB; 2846 NEED1("missing fib number"); 2847 if (_substrcmp(*av, "tablearg") == 0) { 2848 action->arg1 = IP_FW_TABLEARG; 2849 } else { 2850 action->arg1 = strtoul(*av, NULL, 10); 2851 if (sysctlbyname("net.fibs", &numfibs, &intsize, 2852 NULL, 0) == -1) 2853 errx(EX_DATAERR, "fibs not suported.\n"); 2854 if (action->arg1 >= numfibs) /* Temporary */ 2855 errx(EX_DATAERR, "fib too large.\n"); 2856 } 2857 av++; 2858 break; 2859 } 2860 2861 case TOK_REASS: 2862 action->opcode = O_REASS; 2863 break; 2864 2865 default: 2866 errx(EX_DATAERR, "invalid action %s\n", av[-1]); 2867 } 2868 action = next_cmd(action); 2869 2870 /* 2871 * [altq queuename] -- altq tag, optional 2872 * [log [logamount N]] -- log, optional 2873 * 2874 * If they exist, it go first in the cmdbuf, but then it is 2875 * skipped in the copy section to the end of the buffer. 2876 */ 2877 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 2878 av++; 2879 switch (i) { 2880 case TOK_LOG: 2881 { 2882 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 2883 int l; 2884 2885 if (have_log) 2886 errx(EX_DATAERR, 2887 "log cannot be specified more than once"); 2888 have_log = (ipfw_insn *)c; 2889 cmd->len = F_INSN_SIZE(ipfw_insn_log); 2890 cmd->opcode = O_LOG; 2891 if (av[0] && _substrcmp(*av, "logamount") == 0) { 2892 av++; 2893 NEED1("logamount requires argument"); 2894 l = atoi(*av); 2895 if (l < 0) 2896 errx(EX_DATAERR, 2897 "logamount must be positive"); 2898 c->max_log = l; 2899 av++; 2900 } else { 2901 len = sizeof(c->max_log); 2902 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 2903 &c->max_log, &len, NULL, 0) == -1) 2904 errx(1, "sysctlbyname(\"%s\")", 2905 "net.inet.ip.fw.verbose_limit"); 2906 } 2907 } 2908 break; 2909 2910#ifndef NO_ALTQ 2911 case TOK_ALTQ: 2912 { 2913 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 2914 2915 NEED1("missing altq queue name"); 2916 if (have_altq) 2917 errx(EX_DATAERR, 2918 "altq cannot be specified more than once"); 2919 have_altq = (ipfw_insn *)a; 2920 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 2921 cmd->opcode = O_ALTQ; 2922 a->qid = altq_name_to_qid(*av); 2923 av++; 2924 } 2925 break; 2926#endif 2927 2928 case TOK_TAG: 2929 case TOK_UNTAG: { 2930 uint16_t tag; 2931 2932 if (have_tag) 2933 errx(EX_USAGE, "tag and untag cannot be " 2934 "specified more than once"); 2935 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 2936 rule_action_params); 2937 have_tag = cmd; 2938 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 2939 av++; 2940 break; 2941 } 2942 2943 default: 2944 abort(); 2945 } 2946 cmd = next_cmd(cmd); 2947 } 2948 2949 if (have_state) /* must be a check-state, we are done */ 2950 goto done; 2951 2952#define OR_START(target) \ 2953 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 2954 if (open_par) \ 2955 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 2956 prev = NULL; \ 2957 open_par = 1; \ 2958 if ( (av[0])[1] == '\0') { \ 2959 av++; \ 2960 } else \ 2961 (*av)++; \ 2962 } \ 2963 target: \ 2964 2965 2966#define CLOSE_PAR \ 2967 if (open_par) { \ 2968 if (av[0] && ( \ 2969 strcmp(*av, ")") == 0 || \ 2970 strcmp(*av, "}") == 0)) { \ 2971 prev = NULL; \ 2972 open_par = 0; \ 2973 av++; \ 2974 } else \ 2975 errx(EX_USAGE, "missing \")\"\n"); \ 2976 } 2977 2978#define NOT_BLOCK \ 2979 if (av[0] && _substrcmp(*av, "not") == 0) { \ 2980 if (cmd->len & F_NOT) \ 2981 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 2982 cmd->len |= F_NOT; \ 2983 av++; \ 2984 } 2985 2986#define OR_BLOCK(target) \ 2987 if (av[0] && _substrcmp(*av, "or") == 0) { \ 2988 if (prev == NULL || open_par == 0) \ 2989 errx(EX_DATAERR, "invalid OR block"); \ 2990 prev->len |= F_OR; \ 2991 av++; \ 2992 goto target; \ 2993 } \ 2994 CLOSE_PAR; 2995 2996 first_cmd = cmd; 2997 2998#if 0 2999 /* 3000 * MAC addresses, optional. 3001 * If we have this, we skip the part "proto from src to dst" 3002 * and jump straight to the option parsing. 3003 */ 3004 NOT_BLOCK; 3005 NEED1("missing protocol"); 3006 if (_substrcmp(*av, "MAC") == 0 || 3007 _substrcmp(*av, "mac") == 0) { 3008 av++; /* the "MAC" keyword */ 3009 add_mac(cmd, av); /* exits in case of errors */ 3010 cmd = next_cmd(cmd); 3011 av += 2; /* dst-mac and src-mac */ 3012 NOT_BLOCK; 3013 NEED1("missing mac type"); 3014 if (add_mactype(cmd, av[0])) 3015 cmd = next_cmd(cmd); 3016 av++; /* any or mac-type */ 3017 goto read_options; 3018 } 3019#endif 3020 3021 /* 3022 * protocol, mandatory 3023 */ 3024 OR_START(get_proto); 3025 NOT_BLOCK; 3026 NEED1("missing protocol"); 3027 if (add_proto_compat(cmd, *av, &proto)) { 3028 av++; 3029 if (F_LEN(cmd) != 0) { 3030 prev = cmd; 3031 cmd = next_cmd(cmd); 3032 } 3033 } else if (first_cmd != cmd) { 3034 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 3035 } else 3036 goto read_options; 3037 OR_BLOCK(get_proto); 3038 3039 /* 3040 * "from", mandatory 3041 */ 3042 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 3043 errx(EX_USAGE, "missing ``from''"); 3044 av++; 3045 3046 /* 3047 * source IP, mandatory 3048 */ 3049 OR_START(source_ip); 3050 NOT_BLOCK; /* optional "not" */ 3051 NEED1("missing source address"); 3052 if (add_src(cmd, *av, proto)) { 3053 av++; 3054 if (F_LEN(cmd) != 0) { /* ! any */ 3055 prev = cmd; 3056 cmd = next_cmd(cmd); 3057 } 3058 } else 3059 errx(EX_USAGE, "bad source address %s", *av); 3060 OR_BLOCK(source_ip); 3061 3062 /* 3063 * source ports, optional 3064 */ 3065 NOT_BLOCK; /* optional "not" */ 3066 if ( av[0] != NULL ) { 3067 if (_substrcmp(*av, "any") == 0 || 3068 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3069 av++; 3070 if (F_LEN(cmd) != 0) 3071 cmd = next_cmd(cmd); 3072 } 3073 } 3074 3075 /* 3076 * "to", mandatory 3077 */ 3078 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 3079 errx(EX_USAGE, "missing ``to''"); 3080 av++; 3081 3082 /* 3083 * destination, mandatory 3084 */ 3085 OR_START(dest_ip); 3086 NOT_BLOCK; /* optional "not" */ 3087 NEED1("missing dst address"); 3088 if (add_dst(cmd, *av, proto)) { 3089 av++; 3090 if (F_LEN(cmd) != 0) { /* ! any */ 3091 prev = cmd; 3092 cmd = next_cmd(cmd); 3093 } 3094 } else 3095 errx( EX_USAGE, "bad destination address %s", *av); 3096 OR_BLOCK(dest_ip); 3097 3098 /* 3099 * dest. ports, optional 3100 */ 3101 NOT_BLOCK; /* optional "not" */ 3102 if (av[0]) { 3103 if (_substrcmp(*av, "any") == 0 || 3104 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3105 av++; 3106 if (F_LEN(cmd) != 0) 3107 cmd = next_cmd(cmd); 3108 } 3109 } 3110 3111read_options: 3112 if (av[0] && first_cmd == cmd) { 3113 /* 3114 * nothing specified so far, store in the rule to ease 3115 * printout later. 3116 */ 3117 rule->_pad = 1; 3118 } 3119 prev = NULL; 3120 while ( av[0] != NULL ) { 3121 char *s; 3122 ipfw_insn_u32 *cmd32; /* alias for cmd */ 3123 3124 s = *av; 3125 cmd32 = (ipfw_insn_u32 *)cmd; 3126 3127 if (*s == '!') { /* alternate syntax for NOT */ 3128 if (cmd->len & F_NOT) 3129 errx(EX_USAGE, "double \"not\" not allowed\n"); 3130 cmd->len = F_NOT; 3131 s++; 3132 } 3133 i = match_token(rule_options, s); 3134 av++; 3135 switch(i) { 3136 case TOK_NOT: 3137 if (cmd->len & F_NOT) 3138 errx(EX_USAGE, "double \"not\" not allowed\n"); 3139 cmd->len = F_NOT; 3140 break; 3141 3142 case TOK_OR: 3143 if (open_par == 0 || prev == NULL) 3144 errx(EX_USAGE, "invalid \"or\" block\n"); 3145 prev->len |= F_OR; 3146 break; 3147 3148 case TOK_STARTBRACE: 3149 if (open_par) 3150 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 3151 open_par = 1; 3152 break; 3153 3154 case TOK_ENDBRACE: 3155 if (!open_par) 3156 errx(EX_USAGE, "+missing \")\"\n"); 3157 open_par = 0; 3158 prev = NULL; 3159 break; 3160 3161 case TOK_IN: 3162 fill_cmd(cmd, O_IN, 0, 0); 3163 break; 3164 3165 case TOK_OUT: 3166 cmd->len ^= F_NOT; /* toggle F_NOT */ 3167 fill_cmd(cmd, O_IN, 0, 0); 3168 break; 3169 3170 case TOK_DIVERTED: 3171 fill_cmd(cmd, O_DIVERTED, 0, 3); 3172 break; 3173 3174 case TOK_DIVERTEDLOOPBACK: 3175 fill_cmd(cmd, O_DIVERTED, 0, 1); 3176 break; 3177 3178 case TOK_DIVERTEDOUTPUT: 3179 fill_cmd(cmd, O_DIVERTED, 0, 2); 3180 break; 3181 3182 case TOK_FRAG: 3183 fill_cmd(cmd, O_FRAG, 0, 0); 3184 break; 3185 3186 case TOK_LAYER2: 3187 fill_cmd(cmd, O_LAYER2, 0, 0); 3188 break; 3189 3190 case TOK_XMIT: 3191 case TOK_RECV: 3192 case TOK_VIA: 3193 NEED1("recv, xmit, via require interface name" 3194 " or address"); 3195 fill_iface((ipfw_insn_if *)cmd, av[0]); 3196 av++; 3197 if (F_LEN(cmd) == 0) /* not a valid address */ 3198 break; 3199 if (i == TOK_XMIT) 3200 cmd->opcode = O_XMIT; 3201 else if (i == TOK_RECV) 3202 cmd->opcode = O_RECV; 3203 else if (i == TOK_VIA) 3204 cmd->opcode = O_VIA; 3205 break; 3206 3207 case TOK_ICMPTYPES: 3208 NEED1("icmptypes requires list of types"); 3209 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 3210 av++; 3211 break; 3212 3213 case TOK_ICMP6TYPES: 3214 NEED1("icmptypes requires list of types"); 3215 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av); 3216 av++; 3217 break; 3218 3219 case TOK_IPTTL: 3220 NEED1("ipttl requires TTL"); 3221 if (strpbrk(*av, "-,")) { 3222 if (!add_ports(cmd, *av, 0, O_IPTTL)) 3223 errx(EX_DATAERR, "invalid ipttl %s", *av); 3224 } else 3225 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 3226 av++; 3227 break; 3228 3229 case TOK_IPID: 3230 NEED1("ipid requires id"); 3231 if (strpbrk(*av, "-,")) { 3232 if (!add_ports(cmd, *av, 0, O_IPID)) 3233 errx(EX_DATAERR, "invalid ipid %s", *av); 3234 } else 3235 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 3236 av++; 3237 break; 3238 3239 case TOK_IPLEN: 3240 NEED1("iplen requires length"); 3241 if (strpbrk(*av, "-,")) { 3242 if (!add_ports(cmd, *av, 0, O_IPLEN)) 3243 errx(EX_DATAERR, "invalid ip len %s", *av); 3244 } else 3245 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 3246 av++; 3247 break; 3248 3249 case TOK_IPVER: 3250 NEED1("ipver requires version"); 3251 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 3252 av++; 3253 break; 3254 3255 case TOK_IPPRECEDENCE: 3256 NEED1("ipprecedence requires value"); 3257 fill_cmd(cmd, O_IPPRECEDENCE, 0, 3258 (strtoul(*av, NULL, 0) & 7) << 5); 3259 av++; 3260 break; 3261 3262 case TOK_IPOPTS: 3263 NEED1("missing argument for ipoptions"); 3264 fill_flags(cmd, O_IPOPT, f_ipopts, *av); 3265 av++; 3266 break; 3267 3268 case TOK_IPTOS: 3269 NEED1("missing argument for iptos"); 3270 fill_flags(cmd, O_IPTOS, f_iptos, *av); 3271 av++; 3272 break; 3273 3274 case TOK_UID: 3275 NEED1("uid requires argument"); 3276 { 3277 char *end; 3278 uid_t uid; 3279 struct passwd *pwd; 3280 3281 cmd->opcode = O_UID; 3282 uid = strtoul(*av, &end, 0); 3283 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 3284 if (pwd == NULL) 3285 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 3286 cmd32->d[0] = pwd->pw_uid; 3287 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3288 av++; 3289 } 3290 break; 3291 3292 case TOK_GID: 3293 NEED1("gid requires argument"); 3294 { 3295 char *end; 3296 gid_t gid; 3297 struct group *grp; 3298 3299 cmd->opcode = O_GID; 3300 gid = strtoul(*av, &end, 0); 3301 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 3302 if (grp == NULL) 3303 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 3304 cmd32->d[0] = grp->gr_gid; 3305 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3306 av++; 3307 } 3308 break; 3309 3310 case TOK_JAIL: 3311 NEED1("jail requires argument"); 3312 { 3313 char *end; 3314 int jid; 3315 3316 cmd->opcode = O_JAIL; 3317 jid = (int)strtol(*av, &end, 0); 3318 if (jid < 0 || *end != '\0') 3319 errx(EX_DATAERR, "jail requires prison ID"); 3320 cmd32->d[0] = (uint32_t)jid; 3321 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 3322 av++; 3323 } 3324 break; 3325 3326 case TOK_ESTAB: 3327 fill_cmd(cmd, O_ESTAB, 0, 0); 3328 break; 3329 3330 case TOK_SETUP: 3331 fill_cmd(cmd, O_TCPFLAGS, 0, 3332 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 3333 break; 3334 3335 case TOK_TCPDATALEN: 3336 NEED1("tcpdatalen requires length"); 3337 if (strpbrk(*av, "-,")) { 3338 if (!add_ports(cmd, *av, 0, O_TCPDATALEN)) 3339 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 3340 } else 3341 fill_cmd(cmd, O_TCPDATALEN, 0, 3342 strtoul(*av, NULL, 0)); 3343 av++; 3344 break; 3345 3346 case TOK_TCPOPTS: 3347 NEED1("missing argument for tcpoptions"); 3348 fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av); 3349 av++; 3350 break; 3351 3352 case TOK_TCPSEQ: 3353 case TOK_TCPACK: 3354 NEED1("tcpseq/tcpack requires argument"); 3355 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 3356 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 3357 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 3358 av++; 3359 break; 3360 3361 case TOK_TCPWIN: 3362 NEED1("tcpwin requires length"); 3363 fill_cmd(cmd, O_TCPWIN, 0, 3364 htons(strtoul(*av, NULL, 0))); 3365 av++; 3366 break; 3367 3368 case TOK_TCPFLAGS: 3369 NEED1("missing argument for tcpflags"); 3370 cmd->opcode = O_TCPFLAGS; 3371 fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av); 3372 av++; 3373 break; 3374 3375 case TOK_KEEPSTATE: 3376 if (open_par) 3377 errx(EX_USAGE, "keep-state cannot be part " 3378 "of an or block"); 3379 if (have_state) 3380 errx(EX_USAGE, "only one of keep-state " 3381 "and limit is allowed"); 3382 have_state = cmd; 3383 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 3384 break; 3385 3386 case TOK_LIMIT: { 3387 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 3388 int val; 3389 3390 if (open_par) 3391 errx(EX_USAGE, 3392 "limit cannot be part of an or block"); 3393 if (have_state) 3394 errx(EX_USAGE, "only one of keep-state and " 3395 "limit is allowed"); 3396 have_state = cmd; 3397 3398 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 3399 cmd->opcode = O_LIMIT; 3400 c->limit_mask = c->conn_limit = 0; 3401 3402 while ( av[0] != NULL ) { 3403 if ((val = match_token(limit_masks, *av)) <= 0) 3404 break; 3405 c->limit_mask |= val; 3406 av++; 3407 } 3408 3409 if (c->limit_mask == 0) 3410 errx(EX_USAGE, "limit: missing limit mask"); 3411 3412 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 3413 TOK_LIMIT, rule_options); 3414 3415 av++; 3416 break; 3417 } 3418 3419 case TOK_PROTO: 3420 NEED1("missing protocol"); 3421 if (add_proto(cmd, *av, &proto)) { 3422 av++; 3423 } else 3424 errx(EX_DATAERR, "invalid protocol ``%s''", 3425 *av); 3426 break; 3427 3428 case TOK_SRCIP: 3429 NEED1("missing source IP"); 3430 if (add_srcip(cmd, *av)) { 3431 av++; 3432 } 3433 break; 3434 3435 case TOK_DSTIP: 3436 NEED1("missing destination IP"); 3437 if (add_dstip(cmd, *av)) { 3438 av++; 3439 } 3440 break; 3441 3442 case TOK_SRCIP6: 3443 NEED1("missing source IP6"); 3444 if (add_srcip6(cmd, *av)) { 3445 av++; 3446 } 3447 break; 3448 3449 case TOK_DSTIP6: 3450 NEED1("missing destination IP6"); 3451 if (add_dstip6(cmd, *av)) { 3452 av++; 3453 } 3454 break; 3455 3456 case TOK_SRCPORT: 3457 NEED1("missing source port"); 3458 if (_substrcmp(*av, "any") == 0 || 3459 add_ports(cmd, *av, proto, O_IP_SRCPORT)) { 3460 av++; 3461 } else 3462 errx(EX_DATAERR, "invalid source port %s", *av); 3463 break; 3464 3465 case TOK_DSTPORT: 3466 NEED1("missing destination port"); 3467 if (_substrcmp(*av, "any") == 0 || 3468 add_ports(cmd, *av, proto, O_IP_DSTPORT)) { 3469 av++; 3470 } else 3471 errx(EX_DATAERR, "invalid destination port %s", 3472 *av); 3473 break; 3474 3475 case TOK_MAC: 3476 if (add_mac(cmd, av)) 3477 av += 2; 3478 break; 3479 3480 case TOK_MACTYPE: 3481 NEED1("missing mac type"); 3482 if (!add_mactype(cmd, *av)) 3483 errx(EX_DATAERR, "invalid mac type %s", *av); 3484 av++; 3485 break; 3486 3487 case TOK_VERREVPATH: 3488 fill_cmd(cmd, O_VERREVPATH, 0, 0); 3489 break; 3490 3491 case TOK_VERSRCREACH: 3492 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 3493 break; 3494 3495 case TOK_ANTISPOOF: 3496 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 3497 break; 3498 3499 case TOK_IPSEC: 3500 fill_cmd(cmd, O_IPSEC, 0, 0); 3501 break; 3502 3503 case TOK_IPV6: 3504 fill_cmd(cmd, O_IP6, 0, 0); 3505 break; 3506 3507 case TOK_IPV4: 3508 fill_cmd(cmd, O_IP4, 0, 0); 3509 break; 3510 3511 case TOK_EXT6HDR: 3512 fill_ext6hdr( cmd, *av ); 3513 av++; 3514 break; 3515 3516 case TOK_FLOWID: 3517 if (proto != IPPROTO_IPV6 ) 3518 errx( EX_USAGE, "flow-id filter is active " 3519 "only for ipv6 protocol\n"); 3520 fill_flow6( (ipfw_insn_u32 *) cmd, *av ); 3521 av++; 3522 break; 3523 3524 case TOK_COMMENT: 3525 fill_comment(cmd, av); 3526 av[0]=NULL; 3527 break; 3528 3529 case TOK_TAGGED: 3530 if (av[0] && strpbrk(*av, "-,")) { 3531 if (!add_ports(cmd, *av, 0, O_TAGGED)) 3532 errx(EX_DATAERR, "tagged: invalid tag" 3533 " list: %s", *av); 3534 } 3535 else { 3536 uint16_t tag; 3537 3538 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 3539 TOK_TAGGED, rule_options); 3540 fill_cmd(cmd, O_TAGGED, 0, tag); 3541 } 3542 av++; 3543 break; 3544 3545 case TOK_FIB: 3546 NEED1("fib requires fib number"); 3547 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 3548 av++; 3549 break; 3550 case TOK_SOCKARG: 3551 fill_cmd(cmd, O_SOCKARG, 0, 0); 3552 break; 3553 3554 case TOK_LOOKUP: { 3555 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 3556 char *p; 3557 int j; 3558 3559 if (!av[0] || !av[1]) 3560 errx(EX_USAGE, "format: lookup argument tablenum"); 3561 cmd->opcode = O_IP_DST_LOOKUP; 3562 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 3563 i = match_token(rule_options, *av); 3564 for (j = 0; lookup_key[j] >= 0 ; j++) { 3565 if (i == lookup_key[j]) 3566 break; 3567 } 3568 if (lookup_key[j] <= 0) 3569 errx(EX_USAGE, "format: cannot lookup on %s", *av); 3570 c->d[1] = j; // i converted to option 3571 av++; 3572 cmd->arg1 = strtoul(*av, &p, 0); 3573 if (p && *p) 3574 errx(EX_USAGE, "format: lookup argument tablenum"); 3575 av++; 3576 } 3577 break; 3578 3579 default: 3580 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 3581 } 3582 if (F_LEN(cmd) > 0) { /* prepare to advance */ 3583 prev = cmd; 3584 cmd = next_cmd(cmd); 3585 } 3586 } 3587 3588done: 3589 /* 3590 * Now copy stuff into the rule. 3591 * If we have a keep-state option, the first instruction 3592 * must be a PROBE_STATE (which is generated here). 3593 * If we have a LOG option, it was stored as the first command, 3594 * and now must be moved to the top of the action part. 3595 */ 3596 dst = (ipfw_insn *)rule->cmd; 3597 3598 /* 3599 * First thing to write into the command stream is the match probability. 3600 */ 3601 if (match_prob != 1) { /* 1 means always match */ 3602 dst->opcode = O_PROB; 3603 dst->len = 2; 3604 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 3605 dst += dst->len; 3606 } 3607 3608 /* 3609 * generate O_PROBE_STATE if necessary 3610 */ 3611 if (have_state && have_state->opcode != O_CHECK_STATE) { 3612 fill_cmd(dst, O_PROBE_STATE, 0, 0); 3613 dst = next_cmd(dst); 3614 } 3615 3616 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 3617 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 3618 i = F_LEN(src); 3619 3620 switch (src->opcode) { 3621 case O_LOG: 3622 case O_KEEP_STATE: 3623 case O_LIMIT: 3624 case O_ALTQ: 3625 case O_TAG: 3626 break; 3627 default: 3628 bcopy(src, dst, i * sizeof(uint32_t)); 3629 dst += i; 3630 } 3631 } 3632 3633 /* 3634 * put back the have_state command as last opcode 3635 */ 3636 if (have_state && have_state->opcode != O_CHECK_STATE) { 3637 i = F_LEN(have_state); 3638 bcopy(have_state, dst, i * sizeof(uint32_t)); 3639 dst += i; 3640 } 3641 /* 3642 * start action section 3643 */ 3644 rule->act_ofs = dst - rule->cmd; 3645 3646 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 3647 if (have_log) { 3648 i = F_LEN(have_log); 3649 bcopy(have_log, dst, i * sizeof(uint32_t)); 3650 dst += i; 3651 } 3652 if (have_altq) { 3653 i = F_LEN(have_altq); 3654 bcopy(have_altq, dst, i * sizeof(uint32_t)); 3655 dst += i; 3656 } 3657 if (have_tag) { 3658 i = F_LEN(have_tag); 3659 bcopy(have_tag, dst, i * sizeof(uint32_t)); 3660 dst += i; 3661 } 3662 /* 3663 * copy all other actions 3664 */ 3665 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 3666 i = F_LEN(src); 3667 bcopy(src, dst, i * sizeof(uint32_t)); 3668 dst += i; 3669 } 3670 3671 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 3672 i = (char *)dst - (char *)rule; 3673 if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1) 3674 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD"); 3675 if (!co.do_quiet) 3676 show_ipfw(rule, 0, 0); 3677} 3678 3679/* 3680 * clear the counters or the log counters. 3681 */ 3682void 3683ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */) 3684{ 3685 uint32_t arg, saved_arg; 3686 int failed = EX_OK; 3687 char const *errstr; 3688 char const *name = optname ? "RESETLOG" : "ZERO"; 3689 3690 optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO; 3691 3692 av++; ac--; 3693 3694 if (!ac) { 3695 /* clear all entries */ 3696 if (do_cmd(optname, NULL, 0) < 0) 3697 err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name); 3698 if (!co.do_quiet) 3699 printf("%s.\n", optname == IP_FW_ZERO ? 3700 "Accounting cleared":"Logging counts reset"); 3701 3702 return; 3703 } 3704 3705 while (ac) { 3706 /* Rule number */ 3707 if (isdigit(**av)) { 3708 arg = strtonum(*av, 0, 0xffff, &errstr); 3709 if (errstr) 3710 errx(EX_DATAERR, 3711 "invalid rule number %s\n", *av); 3712 saved_arg = arg; 3713 if (co.use_set) 3714 arg |= (1 << 24) | ((co.use_set - 1) << 16); 3715 av++; 3716 ac--; 3717 if (do_cmd(optname, &arg, sizeof(arg))) { 3718 warn("rule %u: setsockopt(IP_FW_%s)", 3719 saved_arg, name); 3720 failed = EX_UNAVAILABLE; 3721 } else if (!co.do_quiet) 3722 printf("Entry %d %s.\n", saved_arg, 3723 optname == IP_FW_ZERO ? 3724 "cleared" : "logging count reset"); 3725 } else { 3726 errx(EX_USAGE, "invalid rule number ``%s''", *av); 3727 } 3728 } 3729 if (failed != EX_OK) 3730 exit(failed); 3731} 3732 3733void 3734ipfw_flush(int force) 3735{ 3736 int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH; 3737 3738 if (!force && !co.do_quiet) { /* need to ask user */ 3739 int c; 3740 3741 printf("Are you sure? [yn] "); 3742 fflush(stdout); 3743 do { 3744 c = toupper(getc(stdin)); 3745 while (c != '\n' && getc(stdin) != '\n') 3746 if (feof(stdin)) 3747 return; /* and do not flush */ 3748 } while (c != 'Y' && c != 'N'); 3749 printf("\n"); 3750 if (c == 'N') /* user said no */ 3751 return; 3752 } 3753 if (co.do_pipe) { 3754 dummynet_flush(); 3755 return; 3756 } 3757 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 3758 if (co.use_set) { 3759 uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24); 3760 if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0) 3761 err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)"); 3762 } else if (do_cmd(cmd, NULL, 0) < 0) 3763 err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)", 3764 co.do_pipe ? "DUMMYNET" : "FW"); 3765 if (!co.do_quiet) 3766 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 3767} 3768 3769 3770static void table_list(ipfw_table_entry ent, int need_header); 3771 3772/* 3773 * This one handles all table-related commands 3774 * ipfw table N add addr[/masklen] [value] 3775 * ipfw table N delete addr[/masklen] 3776 * ipfw table {N | all} flush 3777 * ipfw table {N | all} list 3778 */ 3779void 3780ipfw_table_handler(int ac, char *av[]) 3781{ 3782 ipfw_table_entry ent; 3783 int do_add; 3784 int is_all; 3785 size_t len; 3786 char *p; 3787 uint32_t a; 3788 uint32_t tables_max; 3789 3790 len = sizeof(tables_max); 3791 if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len, 3792 NULL, 0) == -1) { 3793#ifdef IPFW_TABLES_MAX 3794 warn("Warn: Failed to get the max tables number via sysctl. " 3795 "Using the compiled in defaults. \nThe reason was"); 3796 tables_max = IPFW_TABLES_MAX; 3797#else 3798 errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")"); 3799#endif 3800 } 3801 3802 ac--; av++; 3803 if (ac && isdigit(**av)) { 3804 ent.tbl = atoi(*av); 3805 is_all = 0; 3806 ac--; av++; 3807 } else if (ac && _substrcmp(*av, "all") == 0) { 3808 ent.tbl = 0; 3809 is_all = 1; 3810 ac--; av++; 3811 } else 3812 errx(EX_USAGE, "table number or 'all' keyword required"); 3813 if (ent.tbl >= tables_max) 3814 errx(EX_USAGE, "The table number exceeds the maximum allowed " 3815 "value (%d)", tables_max - 1); 3816 NEED1("table needs command"); 3817 if (is_all && _substrcmp(*av, "list") != 0 3818 && _substrcmp(*av, "flush") != 0) 3819 errx(EX_USAGE, "table number required"); 3820 3821 if (_substrcmp(*av, "add") == 0 || 3822 _substrcmp(*av, "delete") == 0) { 3823 do_add = **av == 'a'; 3824 ac--; av++; 3825 if (!ac) 3826 errx(EX_USAGE, "IP address required"); 3827 p = strchr(*av, '/'); 3828 if (p) { 3829 *p++ = '\0'; 3830 ent.masklen = atoi(p); 3831 if (ent.masklen > 32) 3832 errx(EX_DATAERR, "bad width ``%s''", p); 3833 } else 3834 ent.masklen = 32; 3835 if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0) 3836 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 3837 ac--; av++; 3838 if (do_add && ac) { 3839 unsigned int tval; 3840 /* isdigit is a bit of a hack here.. */ 3841 if (strchr(*av, (int)'.') == NULL && isdigit(**av)) { 3842 ent.value = strtoul(*av, NULL, 0); 3843 } else { 3844 if (lookup_host(*av, (struct in_addr *)&tval) == 0) { 3845 /* The value must be stored in host order * 3846 * so that the values < 65k can be distinguished */ 3847 ent.value = ntohl(tval); 3848 } else { 3849 errx(EX_NOHOST, "hostname ``%s'' unknown", *av); 3850 } 3851 } 3852 } else 3853 ent.value = 0; 3854 if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL, 3855 &ent, sizeof(ent)) < 0) { 3856 /* If running silent, don't bomb out on these errors. */ 3857 if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH)))) 3858 err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)", 3859 do_add ? "ADD" : "DEL"); 3860 /* In silent mode, react to a failed add by deleting */ 3861 if (do_add) { 3862 do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent)); 3863 if (do_cmd(IP_FW_TABLE_ADD, 3864 &ent, sizeof(ent)) < 0) 3865 err(EX_OSERR, 3866 "setsockopt(IP_FW_TABLE_ADD)"); 3867 } 3868 } 3869 } else if (_substrcmp(*av, "flush") == 0) { 3870 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1); 3871 do { 3872 if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl, 3873 sizeof(ent.tbl)) < 0) 3874 err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)"); 3875 } while (++ent.tbl < a); 3876 } else if (_substrcmp(*av, "list") == 0) { 3877 a = is_all ? tables_max : (uint32_t)(ent.tbl + 1); 3878 do { 3879 table_list(ent, is_all); 3880 } while (++ent.tbl < a); 3881 } else 3882 errx(EX_USAGE, "invalid table command %s", *av); 3883} 3884 3885static void 3886table_list(ipfw_table_entry ent, int need_header) 3887{ 3888 ipfw_table *tbl; 3889 socklen_t l; 3890 uint32_t a; 3891 3892 a = ent.tbl; 3893 l = sizeof(a); 3894 if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0) 3895 err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)"); 3896 3897 /* If a is zero we have nothing to do, the table is empty. */ 3898 if (a == 0) 3899 return; 3900 3901 l = sizeof(*tbl) + a * sizeof(ipfw_table_entry); 3902 tbl = safe_calloc(1, l); 3903 tbl->tbl = ent.tbl; 3904 if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0) 3905 err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)"); 3906 if (tbl->cnt && need_header) 3907 printf("---table(%d)---\n", tbl->tbl); 3908 for (a = 0; a < tbl->cnt; a++) { 3909 unsigned int tval; 3910 tval = tbl->ent[a].value; 3911 if (co.do_value_as_ip) { 3912 char tbuf[128]; 3913 strncpy(tbuf, inet_ntoa(*(struct in_addr *) 3914 &tbl->ent[a].addr), 127); 3915 /* inet_ntoa expects network order */ 3916 tval = htonl(tval); 3917 printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen, 3918 inet_ntoa(*(struct in_addr *)&tval)); 3919 } else { 3920 printf("%s/%u %u\n", 3921 inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr), 3922 tbl->ent[a].masklen, tval); 3923 } 3924 } 3925 free(tbl); 3926} 3927