ipfw2.c revision 308970
1238438Sdteske/* 2247280Sdteske * Copyright (c) 2002-2003 Luigi Rizzo 3238438Sdteske * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4238438Sdteske * Copyright (c) 1994 Ugen J.S.Antsilevich 5238438Sdteske * 6238438Sdteske * Idea and grammar partially left from: 7238438Sdteske * Copyright (c) 1993 Daniel Boulet 8238438Sdteske * 9238438Sdteske * Redistribution and use in source forms, with and without modification, 10238438Sdteske * are permitted provided that this entire comment appears intact. 11238438Sdteske * 12238438Sdteske * Redistribution in binary form may occur without any restrictions. 13238438Sdteske * Obviously, it would be nice if you gave credit where credit is due 14238438Sdteske * but requiring it would be too onerous. 15238438Sdteske * 16238438Sdteske * This software is provided ``AS IS'' without any warranties of any kind. 17238438Sdteske * 18238438Sdteske * NEW command line interface for IP firewall facility 19238438Sdteske * 20238438Sdteske * $FreeBSD: stable/11/sbin/ipfw/ipfw2.c 308970 2016-11-22 10:09:04Z ae $ 21238438Sdteske */ 22238438Sdteske 23238438Sdteske#include <sys/types.h> 24238438Sdteske#include <sys/param.h> 25238438Sdteske#include <sys/socket.h> 26238438Sdteske#include <sys/sockio.h> 27238438Sdteske#include <sys/sysctl.h> 28250319Sdteske 29238438Sdteske#include "ipfw2.h" 30247280Sdteske 31238438Sdteske#include <ctype.h> 32238438Sdteske#include <err.h> 33250323Sdteske#include <errno.h> 34247280Sdteske#include <grp.h> 35247280Sdteske#include <netdb.h> 36250323Sdteske#include <pwd.h> 37252745Sdteske#include <stdio.h> 38252745Sdteske#include <stdarg.h> 39250323Sdteske#include <stdlib.h> 40250323Sdteske#include <string.h> 41250323Sdteske#include <sysexits.h> 42241653Sdteske#include <time.h> /* ctime */ 43258420Sdteske#include <timeconv.h> /* _long_to_time */ 44250323Sdteske#include <unistd.h> 45250323Sdteske#include <fcntl.h> 46253545Sdteske#include <stddef.h> /* offsetof */ 47247280Sdteske 48250323Sdteske#include <net/ethernet.h> 49250323Sdteske#include <net/if.h> /* only IFNAMSIZ */ 50247280Sdteske#include <netinet/in.h> 51247280Sdteske#include <netinet/in_systm.h> /* only n_short, n_long */ 52258420Sdteske#include <netinet/ip.h> 53250323Sdteske#include <netinet/ip_icmp.h> 54247280Sdteske#include <netinet/ip_fw.h> 55247280Sdteske#include <netinet/tcp.h> 56250323Sdteske#include <arpa/inet.h> 57241653Sdteske 58250323Sdteskestruct cmdline_opts co; /* global options */ 59250323Sdteske 60272230Sdteskestruct format_opts { 61247280Sdteske int bcwidth; 62250323Sdteske int pcwidth; 63250323Sdteske int show_counters; 64247280Sdteske int show_time; /* show timestamp */ 65238438Sdteske uint32_t set_mask; /* enabled sets mask */ 66241653Sdteske uint32_t flags; /* request flags */ 67238438Sdteske uint32_t first; /* first rule to request */ 68247280Sdteske uint32_t last; /* last rule to request */ 69247280Sdteske uint32_t dcnt; /* number of dynamic states */ 70247280Sdteske ipfw_obj_ctlv *tstate; /* table state data */ 71247280Sdteske}; 72247280Sdteske 73247280Sdteskeint resvd_set_number = RESVD_SET; 74247280Sdteske 75250323Sdteskeint ipfw_socket = -1; 76247280Sdteske 77247280Sdteske#define CHECK_LENGTH(v, len) do { \ 78247280Sdteske if ((v) < (len)) \ 79247280Sdteske errx(EX_DATAERR, "Rule too long"); \ 80249827Sdteske } while (0) 81247280Sdteske/* 82247280Sdteske * Check if we have enough space in cmd buffer. Note that since 83247280Sdteske * first 8? u32 words are reserved by reserved header, full cmd 84245052Sdteske * buffer can't be used, so we need to protect from buffer overrun 85250323Sdteske * only. At the beginning, cblen is less than actual buffer size by 86247280Sdteske * size of ipfw_insn_u32 instruction + 1 u32 work. This eliminates need 87250323Sdteske * for checking small instructions fitting in given range. 88247280Sdteske * We also (ab)use the fact that ipfw_insn is always the first field 89247280Sdteske * for any custom instruction. 90247280Sdteske */ 91247280Sdteske#define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd)) 92250319Sdteske 93247280Sdteske#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \ 94252112Sdteske if (!av[0]) \ 95247280Sdteske errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \ 96241653Sdteske if (_substrcmp(*av, "tablearg") == 0) { \ 97247280Sdteske arg = IP_FW_TARG; \ 98250323Sdteske break; \ 99247280Sdteske } \ 100247280Sdteske \ 101250323Sdteske { \ 102250323Sdteske long _xval; \ 103247280Sdteske char *end; \ 104247280Sdteske \ 105247280Sdteske _xval = strtol(*av, &end, 10); \ 106247280Sdteske \ 107238438Sdteske if (!isdigit(**av) || *end != '\0' || (_xval == 0 && errno == EINVAL)) \ 108250323Sdteske errx(EX_DATAERR, "%s: invalid argument: %s", \ 109250323Sdteske match_value(s_x, tok), *av); \ 110250323Sdteske \ 111247280Sdteske if (errno == ERANGE || _xval < min || _xval > max) \ 112247280Sdteske errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \ 113247280Sdteske match_value(s_x, tok), min, max, *av); \ 114250323Sdteske \ 115250323Sdteske if (_xval == IP_FW_TARG) \ 116247280Sdteske errx(EX_DATAERR, "%s: illegal argument value: %s", \ 117250323Sdteske match_value(s_x, tok), *av); \ 118250323Sdteske arg = _xval; \ 119247280Sdteske } \ 120247280Sdteske} while (0) 121247280Sdteske 122247280Sdteskestatic struct _s_x f_tcpflags[] = { 123247280Sdteske { "syn", TH_SYN }, 124247280Sdteske { "fin", TH_FIN }, 125247280Sdteske { "ack", TH_ACK }, 126247280Sdteske { "psh", TH_PUSH }, 127238438Sdteske { "rst", TH_RST }, 128238438Sdteske { "urg", TH_URG }, 129247280Sdteske { "tcp flag", 0 }, 130247280Sdteske { NULL, 0 } 131247280Sdteske}; 132250323Sdteske 133247280Sdteskestatic struct _s_x f_tcpopts[] = { 134247280Sdteske { "mss", IP_FW_TCPOPT_MSS }, 135247280Sdteske { "maxseg", IP_FW_TCPOPT_MSS }, 136250323Sdteske { "window", IP_FW_TCPOPT_WINDOW }, 137247280Sdteske { "sack", IP_FW_TCPOPT_SACK }, 138250323Sdteske { "ts", IP_FW_TCPOPT_TS }, 139247280Sdteske { "timestamp", IP_FW_TCPOPT_TS }, 140247280Sdteske { "cc", IP_FW_TCPOPT_CC }, 141250323Sdteske { "tcp option", 0 }, 142258420Sdteske { NULL, 0 } 143250323Sdteske}; 144250323Sdteske 145247280Sdteske/* 146250323Sdteske * IP options span the range 0 to 255 so we need to remap them 147250323Sdteske * (though in fact only the low 5 bits are significant). 148250323Sdteske */ 149247280Sdteskestatic struct _s_x f_ipopts[] = { 150250323Sdteske { "ssrr", IP_FW_IPOPT_SSRR}, 151250323Sdteske { "lsrr", IP_FW_IPOPT_LSRR}, 152250323Sdteske { "rr", IP_FW_IPOPT_RR}, 153247280Sdteske { "ts", IP_FW_IPOPT_TS}, 154247280Sdteske { "ip option", 0 }, 155247280Sdteske { NULL, 0 } 156252112Sdteske}; 157247280Sdteske 158250323Sdteskestatic struct _s_x f_iptos[] = { 159247280Sdteske { "lowdelay", IPTOS_LOWDELAY}, 160247280Sdteske { "throughput", IPTOS_THROUGHPUT}, 161247280Sdteske { "reliability", IPTOS_RELIABILITY}, 162247280Sdteske { "mincost", IPTOS_MINCOST}, 163250319Sdteske { "congestion", IPTOS_ECN_CE}, 164247280Sdteske { "ecntransport", IPTOS_ECN_ECT0}, 165247280Sdteske { "ip tos option", 0}, 166247280Sdteske { NULL, 0 } 167247280Sdteske}; 168252112Sdteske 169247280Sdteskestruct _s_x f_ipdscp[] = { 170247280Sdteske { "af11", IPTOS_DSCP_AF11 >> 2 }, /* 001010 */ 171250323Sdteske { "af12", IPTOS_DSCP_AF12 >> 2 }, /* 001100 */ 172260675Sdteske { "af13", IPTOS_DSCP_AF13 >> 2 }, /* 001110 */ 173250538Sdteske { "af21", IPTOS_DSCP_AF21 >> 2 }, /* 010010 */ 174247280Sdteske { "af22", IPTOS_DSCP_AF22 >> 2 }, /* 010100 */ 175247280Sdteske { "af23", IPTOS_DSCP_AF23 >> 2 }, /* 010110 */ 176247280Sdteske { "af31", IPTOS_DSCP_AF31 >> 2 }, /* 011010 */ 177247280Sdteske { "af32", IPTOS_DSCP_AF32 >> 2 }, /* 011100 */ 178247280Sdteske { "af33", IPTOS_DSCP_AF33 >> 2 }, /* 011110 */ 179247280Sdteske { "af41", IPTOS_DSCP_AF41 >> 2 }, /* 100010 */ 180252745Sdteske { "af42", IPTOS_DSCP_AF42 >> 2 }, /* 100100 */ 181258420Sdteske { "af43", IPTOS_DSCP_AF43 >> 2 }, /* 100110 */ 182247280Sdteske { "be", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 183247280Sdteske { "ef", IPTOS_DSCP_EF >> 2 }, /* 101110 */ 184247280Sdteske { "cs0", IPTOS_DSCP_CS0 >> 2 }, /* 000000 */ 185250323Sdteske { "cs1", IPTOS_DSCP_CS1 >> 2 }, /* 001000 */ 186247280Sdteske { "cs2", IPTOS_DSCP_CS2 >> 2 }, /* 010000 */ 187250323Sdteske { "cs3", IPTOS_DSCP_CS3 >> 2 }, /* 011000 */ 188247280Sdteske { "cs4", IPTOS_DSCP_CS4 >> 2 }, /* 100000 */ 189247280Sdteske { "cs5", IPTOS_DSCP_CS5 >> 2 }, /* 101000 */ 190247280Sdteske { "cs6", IPTOS_DSCP_CS6 >> 2 }, /* 110000 */ 191247280Sdteske { "cs7", IPTOS_DSCP_CS7 >> 2 }, /* 100000 */ 192250323Sdteske { NULL, 0 } 193250323Sdteske}; 194250323Sdteske 195250323Sdteskestatic struct _s_x limit_masks[] = { 196247280Sdteske {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT}, 197250323Sdteske {"src-addr", DYN_SRC_ADDR}, 198250323Sdteske {"src-port", DYN_SRC_PORT}, 199253545Sdteske {"dst-addr", DYN_DST_ADDR}, 200250319Sdteske {"dst-port", DYN_DST_PORT}, 201250323Sdteske {NULL, 0} 202250323Sdteske}; 203247280Sdteske 204252745Sdteske/* 205250323Sdteske * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines 206247280Sdteske * This is only used in this code. 207256361Sdteske */ 208247280Sdteske#define IPPROTO_ETHERTYPE 0x1000 209250323Sdteskestatic struct _s_x ether_types[] = { 210238438Sdteske /* 211247280Sdteske * Note, we cannot use "-:&/" in the names because they are field 212250323Sdteske * separators in the type specifications. Also, we use s = NULL as 213250323Sdteske * end-delimiter, because a type of 0 can be legal. 214247280Sdteske */ 215247280Sdteske { "ip", 0x0800 }, 216238438Sdteske { "ipv4", 0x0800 }, 217250323Sdteske { "ipv6", 0x86dd }, 218247280Sdteske { "arp", 0x0806 }, 219250323Sdteske { "rarp", 0x8035 }, 220238438Sdteske { "vlan", 0x8100 }, 221272230Sdteske { "loop", 0x9000 }, 222247280Sdteske { "trail", 0x1000 }, 223247280Sdteske { "at", 0x809b }, 224250323Sdteske { "atalk", 0x809b }, 225247280Sdteske { "aarp", 0x80f3 }, 226250323Sdteske { "pppoe_disc", 0x8863 }, 227250323Sdteske { "pppoe_sess", 0x8864 }, 228250323Sdteske { "ipx_8022", 0x00E0 }, 229250319Sdteske { "ipx_8023", 0x0000 }, 230247280Sdteske { "ipx_ii", 0x8137 }, 231247280Sdteske { "ipx_snap", 0x8137 }, 232247280Sdteske { "ipx", 0x8137 }, 233253545Sdteske { "ns", 0x0600 }, 234250323Sdteske { NULL, 0 } 235250323Sdteske}; 236238438Sdteske 237247280Sdteskestatic struct _s_x rule_eactions[] = { 238247280Sdteske { NULL, 0 } /* terminator */ 239247280Sdteske}; 240247280Sdteske 241247280Sdteskestatic struct _s_x rule_actions[] = { 242247280Sdteske { "accept", TOK_ACCEPT }, 243238438Sdteske { "pass", TOK_ACCEPT }, 244247280Sdteske { "allow", TOK_ACCEPT }, 245250323Sdteske { "permit", TOK_ACCEPT }, 246247280Sdteske { "count", TOK_COUNT }, 247247280Sdteske { "pipe", TOK_PIPE }, 248247280Sdteske { "queue", TOK_QUEUE }, 249247280Sdteske { "divert", TOK_DIVERT }, 250252745Sdteske { "tee", TOK_TEE }, 251250323Sdteske { "netgraph", TOK_NETGRAPH }, 252258420Sdteske { "ngtee", TOK_NGTEE }, 253238438Sdteske { "fwd", TOK_FORWARD }, 254247280Sdteske { "forward", TOK_FORWARD }, 255238438Sdteske { "skipto", TOK_SKIPTO }, 256247280Sdteske { "deny", TOK_DENY }, 257247280Sdteske { "drop", TOK_DENY }, 258238438Sdteske { "reject", TOK_REJECT }, 259247280Sdteske { "reset6", TOK_RESET6 }, 260238438Sdteske { "reset", TOK_RESET }, 261247280Sdteske { "unreach6", TOK_UNREACH6 }, 262247280Sdteske { "unreach", TOK_UNREACH }, 263247280Sdteske { "check-state", TOK_CHECKSTATE }, 264252775Sdteske { "//", TOK_COMMENT }, 265252775Sdteske { "nat", TOK_NAT }, 266250323Sdteske { "reass", TOK_REASS }, 267252745Sdteske { "setfib", TOK_SETFIB }, 268250538Sdteske { "setdscp", TOK_SETDSCP }, 269250323Sdteske { "call", TOK_CALL }, 270250323Sdteske { "return", TOK_RETURN }, 271250323Sdteske { "eaction", TOK_EACTION }, 272250323Sdteske { NULL, 0 } /* terminator */ 273250323Sdteske}; 274240797Sdteske 275260675Sdteskestatic struct _s_x rule_action_params[] = { 276258420Sdteske { "altq", TOK_ALTQ }, 277272230Sdteske { "log", TOK_LOG }, 278250323Sdteske { "tag", TOK_TAG }, 279252113Sdteske { "untag", TOK_UNTAG }, 280238438Sdteske { NULL, 0 } /* terminator */ 281247280Sdteske}; 282247280Sdteske 283247280Sdteske/* 284247280Sdteske * The 'lookup' instruction accepts one of the following arguments. 285250319Sdteske * -1 is a terminator for the list. 286250319Sdteske * Arguments are passed as v[1] in O_DST_LOOKUP options. 287247280Sdteske */ 288250323Sdteskestatic int lookup_key[] = { 289247280Sdteske TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT, 290247280Sdteske TOK_UID, TOK_JAIL, TOK_DSCP, -1 }; 291247280Sdteske 292252112Sdteskestatic struct _s_x rule_options[] = { 293250319Sdteske { "tagged", TOK_TAGGED }, 294247280Sdteske { "uid", TOK_UID }, 295247280Sdteske { "gid", TOK_GID }, 296247280Sdteske { "jail", TOK_JAIL }, 297250319Sdteske { "in", TOK_IN }, 298250323Sdteske { "limit", TOK_LIMIT }, 299247280Sdteske { "keep-state", TOK_KEEPSTATE }, 300247280Sdteske { "bridged", TOK_LAYER2 }, 301247280Sdteske { "layer2", TOK_LAYER2 }, 302247280Sdteske { "out", TOK_OUT }, 303252112Sdteske { "diverted", TOK_DIVERTED }, 304247280Sdteske { "diverted-loopback", TOK_DIVERTEDLOOPBACK }, 305250323Sdteske { "diverted-output", TOK_DIVERTEDOUTPUT }, 306250323Sdteske { "xmit", TOK_XMIT }, 307250323Sdteske { "recv", TOK_RECV }, 308250323Sdteske { "via", TOK_VIA }, 309238438Sdteske { "fragment", TOK_FRAG }, 310247280Sdteske { "frag", TOK_FRAG }, 311250323Sdteske { "fib", TOK_FIB }, 312247280Sdteske { "ipoptions", TOK_IPOPTS }, 313250323Sdteske { "ipopts", TOK_IPOPTS }, 314250323Sdteske { "iplen", TOK_IPLEN }, 315250323Sdteske { "ipid", TOK_IPID }, 316241899Sdteske { "ipprecedence", TOK_IPPRECEDENCE }, 317250323Sdteske { "dscp", TOK_DSCP }, 318250323Sdteske { "iptos", TOK_IPTOS }, 319247280Sdteske { "ipttl", TOK_IPTTL }, 320252745Sdteske { "ipversion", TOK_IPVER }, 321247280Sdteske { "ipver", TOK_IPVER }, 322247280Sdteske { "estab", TOK_ESTAB }, 323247280Sdteske { "established", TOK_ESTAB }, 324247280Sdteske { "setup", TOK_SETUP }, 325247280Sdteske { "sockarg", TOK_SOCKARG }, 326252112Sdteske { "tcpdatalen", TOK_TCPDATALEN }, 327250323Sdteske { "tcpflags", TOK_TCPFLAGS }, 328250323Sdteske { "tcpflgs", TOK_TCPFLAGS }, 329250323Sdteske { "tcpoptions", TOK_TCPOPTS }, 330250323Sdteske { "tcpopts", TOK_TCPOPTS }, 331250323Sdteske { "tcpseq", TOK_TCPSEQ }, 332250323Sdteske { "tcpack", TOK_TCPACK }, 333247280Sdteske { "tcpwin", TOK_TCPWIN }, 334250323Sdteske { "icmptype", TOK_ICMPTYPES }, 335247280Sdteske { "icmptypes", TOK_ICMPTYPES }, 336247280Sdteske { "dst-ip", TOK_DSTIP }, 337250323Sdteske { "src-ip", TOK_SRCIP }, 338250323Sdteske { "dst-port", TOK_DSTPORT }, 339250319Sdteske { "src-port", TOK_SRCPORT }, 340238438Sdteske { "proto", TOK_PROTO }, 341250323Sdteske { "MAC", TOK_MAC }, 342250323Sdteske { "mac", TOK_MAC }, 343247280Sdteske { "mac-type", TOK_MACTYPE }, 344250538Sdteske { "verrevpath", TOK_VERREVPATH }, 345247280Sdteske { "versrcreach", TOK_VERSRCREACH }, 346250323Sdteske { "antispoof", TOK_ANTISPOOF }, 347247280Sdteske { "ipsec", TOK_IPSEC }, 348247280Sdteske { "icmp6type", TOK_ICMP6TYPES }, 349247280Sdteske { "icmp6types", TOK_ICMP6TYPES }, 350252745Sdteske { "ext6hdr", TOK_EXT6HDR}, 351238438Sdteske { "flow-id", TOK_FLOWID}, 352247280Sdteske { "ipv6", TOK_IPV6}, 353247280Sdteske { "ip6", TOK_IPV6}, 354250323Sdteske { "ipv4", TOK_IPV4}, 355247280Sdteske { "ip4", TOK_IPV4}, 356252112Sdteske { "dst-ipv6", TOK_DSTIP6}, 357247280Sdteske { "dst-ip6", TOK_DSTIP6}, 358247280Sdteske { "src-ipv6", TOK_SRCIP6}, 359250323Sdteske { "src-ip6", TOK_SRCIP6}, 360247280Sdteske { "lookup", TOK_LOOKUP}, 361250323Sdteske { "flow", TOK_FLOW}, 362250323Sdteske { "//", TOK_COMMENT }, 363247280Sdteske 364247280Sdteske { "not", TOK_NOT }, /* pseudo option */ 365250323Sdteske { "!", /* escape ? */ TOK_NOT }, /* pseudo option */ 366247280Sdteske { "or", TOK_OR }, /* pseudo option */ 367247280Sdteske { "|", /* escape */ TOK_OR }, /* pseudo option */ 368241653Sdteske { "{", TOK_STARTBRACE }, /* pseudo option */ 369247280Sdteske { "(", TOK_STARTBRACE }, /* pseudo option */ 370247280Sdteske { "}", TOK_ENDBRACE }, /* pseudo option */ 371247280Sdteske { ")", TOK_ENDBRACE }, /* pseudo option */ 372250323Sdteske { NULL, 0 } /* terminator */ 373247280Sdteske}; 374252745Sdteske 375250323Sdteskevoid bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg); 376247280Sdteskestatic int ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 377252745Sdteske ipfw_cfg_lheader **pcfg, size_t *psize); 378247280Sdteskestatic int ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 379260675Sdteske ipfw_cfg_lheader *cfg, size_t sz, int ac, char **av); 380258420Sdteskestatic void ipfw_list_tifaces(void); 381250323Sdteske 382250323Sdteskestruct tidx; 383258420Sdteskestatic uint16_t pack_object(struct tidx *tstate, char *name, int otype); 384247280Sdteskestatic uint16_t pack_table(struct tidx *tstate, char *name); 385238438Sdteske 386272230Sdteskestatic char *table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx); 387247280Sdteskestatic void object_sort_ctlv(ipfw_obj_ctlv *ctlv); 388241899Sdteskestatic char *object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, 389247280Sdteske uint16_t type); 390247280Sdteske 391247280Sdteske/* 392247280Sdteske * Simple string buffer API. 393238438Sdteske * Used to simplify buffer passing between function and for 394247280Sdteske * transparent overrun handling. 395247280Sdteske */ 396247280Sdteske 397247280Sdteske/* 398250323Sdteske * Allocates new buffer of given size @sz. 399247280Sdteske * 400250323Sdteske * Returns 0 on success. 401247280Sdteske */ 402247280Sdteskeint 403250323Sdteskebp_alloc(struct buf_pr *b, size_t size) 404247280Sdteske{ 405250323Sdteske memset(b, 0, sizeof(struct buf_pr)); 406250323Sdteske 407250323Sdteske if ((b->buf = calloc(1, size)) == NULL) 408250323Sdteske return (ENOMEM); 409250323Sdteske 410250323Sdteske b->ptr = b->buf; 411250323Sdteske b->size = size; 412250323Sdteske b->avail = b->size; 413250323Sdteske 414250323Sdteske return (0); 415250323Sdteske} 416238438Sdteske 417250323Sdteskevoid 418241653Sdteskebp_free(struct buf_pr *b) 419247280Sdteske{ 420247280Sdteske 421250323Sdteske free(b->buf); 422247280Sdteske} 423247280Sdteske 424247280Sdteske/* 425247280Sdteske * Flushes buffer so new writer start from beginning. 426247280Sdteske */ 427247280Sdteskevoid 428247280Sdteskebp_flush(struct buf_pr *b) 429{ 430 431 b->ptr = b->buf; 432 b->avail = b->size; 433 b->buf[0] = '\0'; 434} 435 436/* 437 * Print message specified by @format and args. 438 * Automatically manage buffer space and transparently handle 439 * buffer overruns. 440 * 441 * Returns number of bytes that should have been printed. 442 */ 443int 444bprintf(struct buf_pr *b, char *format, ...) 445{ 446 va_list args; 447 int i; 448 449 va_start(args, format); 450 451 i = vsnprintf(b->ptr, b->avail, format, args); 452 va_end(args); 453 454 if (i > b->avail || i < 0) { 455 /* Overflow or print error */ 456 b->avail = 0; 457 } else { 458 b->ptr += i; 459 b->avail -= i; 460 } 461 462 b->needed += i; 463 464 return (i); 465} 466 467/* 468 * Special values printer for tablearg-aware opcodes. 469 */ 470void 471bprint_uint_arg(struct buf_pr *bp, const char *str, uint32_t arg) 472{ 473 474 if (str != NULL) 475 bprintf(bp, "%s", str); 476 if (arg == IP_FW_TARG) 477 bprintf(bp, "tablearg"); 478 else 479 bprintf(bp, "%u", arg); 480} 481 482/* 483 * Helper routine to print a possibly unaligned uint64_t on 484 * various platform. If width > 0, print the value with 485 * the desired width, followed by a space; 486 * otherwise, return the required width. 487 */ 488int 489pr_u64(struct buf_pr *b, uint64_t *pd, int width) 490{ 491#ifdef TCC 492#define U64_FMT "I64" 493#else 494#define U64_FMT "llu" 495#endif 496 uint64_t u; 497 unsigned long long d; 498 499 bcopy (pd, &u, sizeof(u)); 500 d = u; 501 return (width > 0) ? 502 bprintf(b, "%*" U64_FMT " ", width, d) : 503 snprintf(NULL, 0, "%" U64_FMT, d) ; 504#undef U64_FMT 505} 506 507 508void * 509safe_calloc(size_t number, size_t size) 510{ 511 void *ret = calloc(number, size); 512 513 if (ret == NULL) 514 err(EX_OSERR, "calloc"); 515 return ret; 516} 517 518void * 519safe_realloc(void *ptr, size_t size) 520{ 521 void *ret = realloc(ptr, size); 522 523 if (ret == NULL) 524 err(EX_OSERR, "realloc"); 525 return ret; 526} 527 528/* 529 * Compare things like interface or table names. 530 */ 531int 532stringnum_cmp(const char *a, const char *b) 533{ 534 int la, lb; 535 536 la = strlen(a); 537 lb = strlen(b); 538 539 if (la > lb) 540 return (1); 541 else if (la < lb) 542 return (-01); 543 544 return (strcmp(a, b)); 545} 546 547 548/* 549 * conditionally runs the command. 550 * Selected options or negative -> getsockopt 551 */ 552int 553do_cmd(int optname, void *optval, uintptr_t optlen) 554{ 555 int i; 556 557 if (co.test_only) 558 return 0; 559 560 if (ipfw_socket == -1) 561 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 562 if (ipfw_socket < 0) 563 err(EX_UNAVAILABLE, "socket"); 564 565 if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET || 566 optname == IP_FW_ADD || optname == IP_FW3 || 567 optname == IP_FW_NAT_GET_CONFIG || 568 optname < 0 || 569 optname == IP_FW_NAT_GET_LOG) { 570 if (optname < 0) 571 optname = -optname; 572 i = getsockopt(ipfw_socket, IPPROTO_IP, optname, optval, 573 (socklen_t *)optlen); 574 } else { 575 i = setsockopt(ipfw_socket, IPPROTO_IP, optname, optval, optlen); 576 } 577 return i; 578} 579 580/* 581 * do_set3 - pass ipfw control cmd to kernel 582 * @optname: option name 583 * @optval: pointer to option data 584 * @optlen: option length 585 * 586 * Assumes op3 header is already embedded. 587 * Calls setsockopt() with IP_FW3 as kernel-visible opcode. 588 * Returns 0 on success or errno otherwise. 589 */ 590int 591do_set3(int optname, ip_fw3_opheader *op3, uintptr_t optlen) 592{ 593 594 if (co.test_only) 595 return (0); 596 597 if (ipfw_socket == -1) 598 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 599 if (ipfw_socket < 0) 600 err(EX_UNAVAILABLE, "socket"); 601 602 op3->opcode = optname; 603 604 return (setsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, optlen)); 605} 606 607/* 608 * do_get3 - pass ipfw control cmd to kernel 609 * @optname: option name 610 * @optval: pointer to option data 611 * @optlen: pointer to option length 612 * 613 * Assumes op3 header is already embedded. 614 * Calls getsockopt() with IP_FW3 as kernel-visible opcode. 615 * Returns 0 on success or errno otherwise. 616 */ 617int 618do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen) 619{ 620 int error; 621 622 if (co.test_only) 623 return (0); 624 625 if (ipfw_socket == -1) 626 ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); 627 if (ipfw_socket < 0) 628 err(EX_UNAVAILABLE, "socket"); 629 630 op3->opcode = optname; 631 632 error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, 633 (socklen_t *)optlen); 634 635 return (error); 636} 637 638/** 639 * match_token takes a table and a string, returns the value associated 640 * with the string (-1 in case of failure). 641 */ 642int 643match_token(struct _s_x *table, const char *string) 644{ 645 struct _s_x *pt; 646 uint i = strlen(string); 647 648 for (pt = table ; i && pt->s != NULL ; pt++) 649 if (strlen(pt->s) == i && !bcmp(string, pt->s, i)) 650 return pt->x; 651 return (-1); 652} 653 654/** 655 * match_token_relaxed takes a table and a string, returns the value associated 656 * with the string for the best match. 657 * 658 * Returns: 659 * value from @table for matched records 660 * -1 for non-matched records 661 * -2 if more than one records match @string. 662 */ 663int 664match_token_relaxed(struct _s_x *table, const char *string) 665{ 666 struct _s_x *pt, *m; 667 int i, c; 668 669 i = strlen(string); 670 c = 0; 671 672 for (pt = table ; i != 0 && pt->s != NULL ; pt++) { 673 if (strncmp(pt->s, string, i) != 0) 674 continue; 675 m = pt; 676 c++; 677 } 678 679 if (c == 1) 680 return (m->x); 681 682 return (c > 0 ? -2: -1); 683} 684 685int 686get_token(struct _s_x *table, const char *string, const char *errbase) 687{ 688 int tcmd; 689 690 if ((tcmd = match_token_relaxed(table, string)) < 0) 691 errx(EX_USAGE, "%s %s %s", 692 (tcmd == 0) ? "invalid" : "ambiguous", errbase, string); 693 694 return (tcmd); 695} 696 697/** 698 * match_value takes a table and a value, returns the string associated 699 * with the value (NULL in case of failure). 700 */ 701char const * 702match_value(struct _s_x *p, int value) 703{ 704 for (; p->s != NULL; p++) 705 if (p->x == value) 706 return p->s; 707 return NULL; 708} 709 710size_t 711concat_tokens(char *buf, size_t bufsize, struct _s_x *table, char *delimiter) 712{ 713 struct _s_x *pt; 714 int l; 715 size_t sz; 716 717 for (sz = 0, pt = table ; pt->s != NULL; pt++) { 718 l = snprintf(buf + sz, bufsize - sz, "%s%s", 719 (sz == 0) ? "" : delimiter, pt->s); 720 sz += l; 721 bufsize += l; 722 if (sz > bufsize) 723 return (bufsize); 724 } 725 726 return (sz); 727} 728 729/* 730 * helper function to process a set of flags and set bits in the 731 * appropriate masks. 732 */ 733int 734fill_flags(struct _s_x *flags, char *p, char **e, uint32_t *set, 735 uint32_t *clear) 736{ 737 char *q; /* points to the separator */ 738 int val; 739 uint32_t *which; /* mask we are working on */ 740 741 while (p && *p) { 742 if (*p == '!') { 743 p++; 744 which = clear; 745 } else 746 which = set; 747 q = strchr(p, ','); 748 if (q) 749 *q++ = '\0'; 750 val = match_token(flags, p); 751 if (val <= 0) { 752 if (e != NULL) 753 *e = p; 754 return (-1); 755 } 756 *which |= (uint32_t)val; 757 p = q; 758 } 759 return (0); 760} 761 762void 763print_flags_buffer(char *buf, size_t sz, struct _s_x *list, uint32_t set) 764{ 765 char const *comma = ""; 766 int i, l; 767 768 for (i = 0; list[i].x != 0; i++) { 769 if ((set & list[i].x) == 0) 770 continue; 771 772 set &= ~list[i].x; 773 l = snprintf(buf, sz, "%s%s", comma, list[i].s); 774 if (l >= sz) 775 return; 776 comma = ","; 777 buf += l; 778 sz -=l; 779 } 780} 781 782/* 783 * _substrcmp takes two strings and returns 1 if they do not match, 784 * and 0 if they match exactly or the first string is a sub-string 785 * of the second. A warning is printed to stderr in the case that the 786 * first string is a sub-string of the second. 787 * 788 * This function will be removed in the future through the usual 789 * deprecation process. 790 */ 791int 792_substrcmp(const char *str1, const char* str2) 793{ 794 795 if (strncmp(str1, str2, strlen(str1)) != 0) 796 return 1; 797 798 if (strlen(str1) != strlen(str2)) 799 warnx("DEPRECATED: '%s' matched '%s' as a sub-string", 800 str1, str2); 801 return 0; 802} 803 804/* 805 * _substrcmp2 takes three strings and returns 1 if the first two do not match, 806 * and 0 if they match exactly or the second string is a sub-string 807 * of the first. A warning is printed to stderr in the case that the 808 * first string does not match the third. 809 * 810 * This function exists to warn about the bizarre construction 811 * strncmp(str, "by", 2) which is used to allow people to use a shortcut 812 * for "bytes". The problem is that in addition to accepting "by", 813 * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any 814 * other string beginning with "by". 815 * 816 * This function will be removed in the future through the usual 817 * deprecation process. 818 */ 819int 820_substrcmp2(const char *str1, const char* str2, const char* str3) 821{ 822 823 if (strncmp(str1, str2, strlen(str2)) != 0) 824 return 1; 825 826 if (strcmp(str1, str3) != 0) 827 warnx("DEPRECATED: '%s' matched '%s'", 828 str1, str3); 829 return 0; 830} 831 832/* 833 * prints one port, symbolic or numeric 834 */ 835static void 836print_port(struct buf_pr *bp, int proto, uint16_t port) 837{ 838 839 if (proto == IPPROTO_ETHERTYPE) { 840 char const *s; 841 842 if (co.do_resolv && (s = match_value(ether_types, port)) ) 843 bprintf(bp, "%s", s); 844 else 845 bprintf(bp, "0x%04x", port); 846 } else { 847 struct servent *se = NULL; 848 if (co.do_resolv) { 849 struct protoent *pe = getprotobynumber(proto); 850 851 se = getservbyport(htons(port), pe ? pe->p_name : NULL); 852 } 853 if (se) 854 bprintf(bp, "%s", se->s_name); 855 else 856 bprintf(bp, "%d", port); 857 } 858} 859 860static struct _s_x _port_name[] = { 861 {"dst-port", O_IP_DSTPORT}, 862 {"src-port", O_IP_SRCPORT}, 863 {"ipid", O_IPID}, 864 {"iplen", O_IPLEN}, 865 {"ipttl", O_IPTTL}, 866 {"mac-type", O_MAC_TYPE}, 867 {"tcpdatalen", O_TCPDATALEN}, 868 {"tcpwin", O_TCPWIN}, 869 {"tagged", O_TAGGED}, 870 {NULL, 0} 871}; 872 873/* 874 * Print the values in a list 16-bit items of the types above. 875 * XXX todo: add support for mask. 876 */ 877static void 878print_newports(struct buf_pr *bp, ipfw_insn_u16 *cmd, int proto, int opcode) 879{ 880 uint16_t *p = cmd->ports; 881 int i; 882 char const *sep; 883 884 if (opcode != 0) { 885 sep = match_value(_port_name, opcode); 886 if (sep == NULL) 887 sep = "???"; 888 bprintf(bp, " %s", sep); 889 } 890 sep = " "; 891 for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) { 892 bprintf(bp, "%s", sep); 893 print_port(bp, proto, p[0]); 894 if (p[0] != p[1]) { 895 bprintf(bp, "-"); 896 print_port(bp, proto, p[1]); 897 } 898 sep = ","; 899 } 900} 901 902/* 903 * Like strtol, but also translates service names into port numbers 904 * for some protocols. 905 * In particular: 906 * proto == -1 disables the protocol check; 907 * proto == IPPROTO_ETHERTYPE looks up an internal table 908 * proto == <some value in /etc/protocols> matches the values there. 909 * Returns *end == s in case the parameter is not found. 910 */ 911static int 912strtoport(char *s, char **end, int base, int proto) 913{ 914 char *p, *buf; 915 char *s1; 916 int i; 917 918 *end = s; /* default - not found */ 919 if (*s == '\0') 920 return 0; /* not found */ 921 922 if (isdigit(*s)) 923 return strtol(s, end, base); 924 925 /* 926 * find separator. '\\' escapes the next char. 927 */ 928 for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++) 929 if (*s1 == '\\' && s1[1] != '\0') 930 s1++; 931 932 buf = safe_calloc(s1 - s + 1, 1); 933 934 /* 935 * copy into a buffer skipping backslashes 936 */ 937 for (p = s, i = 0; p != s1 ; p++) 938 if (*p != '\\') 939 buf[i++] = *p; 940 buf[i++] = '\0'; 941 942 if (proto == IPPROTO_ETHERTYPE) { 943 i = match_token(ether_types, buf); 944 free(buf); 945 if (i != -1) { /* found */ 946 *end = s1; 947 return i; 948 } 949 } else { 950 struct protoent *pe = NULL; 951 struct servent *se; 952 953 if (proto != 0) 954 pe = getprotobynumber(proto); 955 setservent(1); 956 se = getservbyname(buf, pe ? pe->p_name : NULL); 957 free(buf); 958 if (se != NULL) { 959 *end = s1; 960 return ntohs(se->s_port); 961 } 962 } 963 return 0; /* not found */ 964} 965 966/* 967 * Fill the body of the command with the list of port ranges. 968 */ 969static int 970fill_newports(ipfw_insn_u16 *cmd, char *av, int proto, int cblen) 971{ 972 uint16_t a, b, *p = cmd->ports; 973 int i = 0; 974 char *s = av; 975 976 while (*s) { 977 a = strtoport(av, &s, 0, proto); 978 if (s == av) /* empty or invalid argument */ 979 return (0); 980 981 CHECK_LENGTH(cblen, i + 2); 982 983 switch (*s) { 984 case '-': /* a range */ 985 av = s + 1; 986 b = strtoport(av, &s, 0, proto); 987 /* Reject expressions like '1-abc' or '1-2-3'. */ 988 if (s == av || (*s != ',' && *s != '\0')) 989 return (0); 990 p[0] = a; 991 p[1] = b; 992 break; 993 case ',': /* comma separated list */ 994 case '\0': 995 p[0] = p[1] = a; 996 break; 997 default: 998 warnx("port list: invalid separator <%c> in <%s>", 999 *s, av); 1000 return (0); 1001 } 1002 1003 i++; 1004 p += 2; 1005 av = s + 1; 1006 } 1007 if (i > 0) { 1008 if (i + 1 > F_LEN_MASK) 1009 errx(EX_DATAERR, "too many ports/ranges\n"); 1010 cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */ 1011 } 1012 return (i); 1013} 1014 1015/* 1016 * Fill the body of the command with the list of DiffServ codepoints. 1017 */ 1018static void 1019fill_dscp(ipfw_insn *cmd, char *av, int cblen) 1020{ 1021 uint32_t *low, *high; 1022 char *s = av, *a; 1023 int code; 1024 1025 cmd->opcode = O_DSCP; 1026 cmd->len |= F_INSN_SIZE(ipfw_insn_u32) + 1; 1027 1028 CHECK_CMDLEN; 1029 1030 low = (uint32_t *)(cmd + 1); 1031 high = low + 1; 1032 1033 *low = 0; 1034 *high = 0; 1035 1036 while (s != NULL) { 1037 a = strchr(s, ','); 1038 1039 if (a != NULL) 1040 *a++ = '\0'; 1041 1042 if (isalpha(*s)) { 1043 if ((code = match_token(f_ipdscp, s)) == -1) 1044 errx(EX_DATAERR, "Unknown DSCP code"); 1045 } else { 1046 code = strtoul(s, NULL, 10); 1047 if (code < 0 || code > 63) 1048 errx(EX_DATAERR, "Invalid DSCP value"); 1049 } 1050 1051 if (code >= 32) 1052 *high |= 1 << (code - 32); 1053 else 1054 *low |= 1 << code; 1055 1056 s = a; 1057 } 1058} 1059 1060static struct _s_x icmpcodes[] = { 1061 { "net", ICMP_UNREACH_NET }, 1062 { "host", ICMP_UNREACH_HOST }, 1063 { "protocol", ICMP_UNREACH_PROTOCOL }, 1064 { "port", ICMP_UNREACH_PORT }, 1065 { "needfrag", ICMP_UNREACH_NEEDFRAG }, 1066 { "srcfail", ICMP_UNREACH_SRCFAIL }, 1067 { "net-unknown", ICMP_UNREACH_NET_UNKNOWN }, 1068 { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN }, 1069 { "isolated", ICMP_UNREACH_ISOLATED }, 1070 { "net-prohib", ICMP_UNREACH_NET_PROHIB }, 1071 { "host-prohib", ICMP_UNREACH_HOST_PROHIB }, 1072 { "tosnet", ICMP_UNREACH_TOSNET }, 1073 { "toshost", ICMP_UNREACH_TOSHOST }, 1074 { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB }, 1075 { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE }, 1076 { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF }, 1077 { NULL, 0 } 1078}; 1079 1080static void 1081fill_reject_code(u_short *codep, char *str) 1082{ 1083 int val; 1084 char *s; 1085 1086 val = strtoul(str, &s, 0); 1087 if (s == str || *s != '\0' || val >= 0x100) 1088 val = match_token(icmpcodes, str); 1089 if (val < 0) 1090 errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str); 1091 *codep = val; 1092 return; 1093} 1094 1095static void 1096print_reject_code(struct buf_pr *bp, uint16_t code) 1097{ 1098 char const *s; 1099 1100 if ((s = match_value(icmpcodes, code)) != NULL) 1101 bprintf(bp, "unreach %s", s); 1102 else 1103 bprintf(bp, "unreach %u", code); 1104} 1105 1106/* 1107 * Returns the number of bits set (from left) in a contiguous bitmask, 1108 * or -1 if the mask is not contiguous. 1109 * XXX this needs a proper fix. 1110 * This effectively works on masks in big-endian (network) format. 1111 * when compiled on little endian architectures. 1112 * 1113 * First bit is bit 7 of the first byte -- note, for MAC addresses, 1114 * the first bit on the wire is bit 0 of the first byte. 1115 * len is the max length in bits. 1116 */ 1117int 1118contigmask(uint8_t *p, int len) 1119{ 1120 int i, n; 1121 1122 for (i=0; i<len ; i++) 1123 if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */ 1124 break; 1125 for (n=i+1; n < len; n++) 1126 if ( (p[n/8] & (1 << (7 - (n%8)))) != 0) 1127 return -1; /* mask not contiguous */ 1128 return i; 1129} 1130 1131/* 1132 * print flags set/clear in the two bitmasks passed as parameters. 1133 * There is a specialized check for f_tcpflags. 1134 */ 1135static void 1136print_flags(struct buf_pr *bp, char const *name, ipfw_insn *cmd, 1137 struct _s_x *list) 1138{ 1139 char const *comma = ""; 1140 int i; 1141 uint8_t set = cmd->arg1 & 0xff; 1142 uint8_t clear = (cmd->arg1 >> 8) & 0xff; 1143 1144 if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) { 1145 bprintf(bp, " setup"); 1146 return; 1147 } 1148 1149 bprintf(bp, " %s ", name); 1150 for (i=0; list[i].x != 0; i++) { 1151 if (set & list[i].x) { 1152 set &= ~list[i].x; 1153 bprintf(bp, "%s%s", comma, list[i].s); 1154 comma = ","; 1155 } 1156 if (clear & list[i].x) { 1157 clear &= ~list[i].x; 1158 bprintf(bp, "%s!%s", comma, list[i].s); 1159 comma = ","; 1160 } 1161 } 1162} 1163 1164 1165/* 1166 * Print the ip address contained in a command. 1167 */ 1168static void 1169print_ip(struct buf_pr *bp, struct format_opts *fo, ipfw_insn_ip *cmd, 1170 char const *s) 1171{ 1172 struct hostent *he = NULL; 1173 struct in_addr *ia; 1174 uint32_t len = F_LEN((ipfw_insn *)cmd); 1175 uint32_t *a = ((ipfw_insn_u32 *)cmd)->d; 1176 char *t; 1177 1178 if (cmd->o.opcode == O_IP_DST_LOOKUP && len > F_INSN_SIZE(ipfw_insn_u32)) { 1179 uint32_t d = a[1]; 1180 const char *arg = "<invalid>"; 1181 1182 if (d < sizeof(lookup_key)/sizeof(lookup_key[0])) 1183 arg = match_value(rule_options, lookup_key[d]); 1184 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1185 bprintf(bp, "%s lookup %s %s", cmd->o.len & F_NOT ? " not": "", 1186 arg, t); 1187 return; 1188 } 1189 bprintf(bp, "%s%s ", cmd->o.len & F_NOT ? " not": "", s); 1190 1191 if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) { 1192 bprintf(bp, "me"); 1193 return; 1194 } 1195 if (cmd->o.opcode == O_IP_SRC_LOOKUP || 1196 cmd->o.opcode == O_IP_DST_LOOKUP) { 1197 t = table_search_ctlv(fo->tstate, ((ipfw_insn *)cmd)->arg1); 1198 bprintf(bp, "table(%s", t); 1199 if (len == F_INSN_SIZE(ipfw_insn_u32)) 1200 bprintf(bp, ",%u", *a); 1201 bprintf(bp, ")"); 1202 return; 1203 } 1204 if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) { 1205 uint32_t x, *map = (uint32_t *)&(cmd->mask); 1206 int i, j; 1207 char comma = '{'; 1208 1209 x = cmd->o.arg1 - 1; 1210 x = htonl( ~x ); 1211 cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1212 bprintf(bp, "%s/%d", inet_ntoa(cmd->addr), 1213 contigmask((uint8_t *)&x, 32)); 1214 x = cmd->addr.s_addr = htonl(cmd->addr.s_addr); 1215 x &= 0xff; /* base */ 1216 /* 1217 * Print bits and ranges. 1218 * Locate first bit set (i), then locate first bit unset (j). 1219 * If we have 3+ consecutive bits set, then print them as a 1220 * range, otherwise only print the initial bit and rescan. 1221 */ 1222 for (i=0; i < cmd->o.arg1; i++) 1223 if (map[i/32] & (1<<(i & 31))) { 1224 for (j=i+1; j < cmd->o.arg1; j++) 1225 if (!(map[ j/32] & (1<<(j & 31)))) 1226 break; 1227 bprintf(bp, "%c%d", comma, i+x); 1228 if (j>i+2) { /* range has at least 3 elements */ 1229 bprintf(bp, "-%d", j-1+x); 1230 i = j-1; 1231 } 1232 comma = ','; 1233 } 1234 bprintf(bp, "}"); 1235 return; 1236 } 1237 /* 1238 * len == 2 indicates a single IP, whereas lists of 1 or more 1239 * addr/mask pairs have len = (2n+1). We convert len to n so we 1240 * use that to count the number of entries. 1241 */ 1242 for (len = len / 2; len > 0; len--, a += 2) { 1243 int mb = /* mask length */ 1244 (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ? 1245 32 : contigmask((uint8_t *)&(a[1]), 32); 1246 if (mb == 32 && co.do_resolv) 1247 he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET); 1248 if (he != NULL) /* resolved to name */ 1249 bprintf(bp, "%s", he->h_name); 1250 else if (mb == 0) /* any */ 1251 bprintf(bp, "any"); 1252 else { /* numeric IP followed by some kind of mask */ 1253 ia = (struct in_addr *)&a[0]; 1254 bprintf(bp, "%s", inet_ntoa(*ia)); 1255 if (mb < 0) { 1256 ia = (struct in_addr *)&a[1]; 1257 bprintf(bp, ":%s", inet_ntoa(*ia)); 1258 } else if (mb < 32) 1259 bprintf(bp, "/%d", mb); 1260 } 1261 if (len > 1) 1262 bprintf(bp, ","); 1263 } 1264} 1265 1266/* 1267 * prints a MAC address/mask pair 1268 */ 1269static void 1270print_mac(struct buf_pr *bp, uint8_t *addr, uint8_t *mask) 1271{ 1272 int l = contigmask(mask, 48); 1273 1274 if (l == 0) 1275 bprintf(bp, " any"); 1276 else { 1277 bprintf(bp, " %02x:%02x:%02x:%02x:%02x:%02x", 1278 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 1279 if (l == -1) 1280 bprintf(bp, "&%02x:%02x:%02x:%02x:%02x:%02x", 1281 mask[0], mask[1], mask[2], 1282 mask[3], mask[4], mask[5]); 1283 else if (l < 48) 1284 bprintf(bp, "/%d", l); 1285 } 1286} 1287 1288static void 1289fill_icmptypes(ipfw_insn_u32 *cmd, char *av) 1290{ 1291 uint8_t type; 1292 1293 cmd->d[0] = 0; 1294 while (*av) { 1295 if (*av == ',') 1296 av++; 1297 1298 type = strtoul(av, &av, 0); 1299 1300 if (*av != ',' && *av != '\0') 1301 errx(EX_DATAERR, "invalid ICMP type"); 1302 1303 if (type > 31) 1304 errx(EX_DATAERR, "ICMP type out of range"); 1305 1306 cmd->d[0] |= 1 << type; 1307 } 1308 cmd->o.opcode = O_ICMPTYPE; 1309 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 1310} 1311 1312static void 1313print_icmptypes(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1314{ 1315 int i; 1316 char sep= ' '; 1317 1318 bprintf(bp, " icmptypes"); 1319 for (i = 0; i < 32; i++) { 1320 if ( (cmd->d[0] & (1 << (i))) == 0) 1321 continue; 1322 bprintf(bp, "%c%d", sep, i); 1323 sep = ','; 1324 } 1325} 1326 1327static void 1328print_dscp(struct buf_pr *bp, ipfw_insn_u32 *cmd) 1329{ 1330 int i = 0; 1331 uint32_t *v; 1332 char sep= ' '; 1333 const char *code; 1334 1335 bprintf(bp, " dscp"); 1336 v = cmd->d; 1337 while (i < 64) { 1338 if (*v & (1 << i)) { 1339 if ((code = match_value(f_ipdscp, i)) != NULL) 1340 bprintf(bp, "%c%s", sep, code); 1341 else 1342 bprintf(bp, "%c%d", sep, i); 1343 sep = ','; 1344 } 1345 1346 if ((++i % 32) == 0) 1347 v++; 1348 } 1349} 1350 1351/* 1352 * show_ipfw() prints the body of an ipfw rule. 1353 * Because the standard rule has at least proto src_ip dst_ip, we use 1354 * a helper function to produce these entries if not provided explicitly. 1355 * The first argument is the list of fields we have, the second is 1356 * the list of fields we want to be printed. 1357 * 1358 * Special cases if we have provided a MAC header: 1359 * + if the rule does not contain IP addresses/ports, do not print them; 1360 * + if the rule does not contain an IP proto, print "all" instead of "ip"; 1361 * 1362 * Once we have 'have_options', IP header fields are printed as options. 1363 */ 1364#define HAVE_PROTO 0x0001 1365#define HAVE_SRCIP 0x0002 1366#define HAVE_DSTIP 0x0004 1367#define HAVE_PROTO4 0x0008 1368#define HAVE_PROTO6 0x0010 1369#define HAVE_IP 0x0100 1370#define HAVE_OPTIONS 0x8000 1371 1372static void 1373show_prerequisites(struct buf_pr *bp, int *flags, int want, int cmd) 1374{ 1375 (void)cmd; /* UNUSED */ 1376 if (co.comment_only) 1377 return; 1378 if ( (*flags & HAVE_IP) == HAVE_IP) 1379 *flags |= HAVE_OPTIONS; 1380 1381 if ( !(*flags & HAVE_OPTIONS)) { 1382 if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) { 1383 if ( (*flags & HAVE_PROTO4)) 1384 bprintf(bp, " ip4"); 1385 else if ( (*flags & HAVE_PROTO6)) 1386 bprintf(bp, " ip6"); 1387 else 1388 bprintf(bp, " ip"); 1389 } 1390 if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP)) 1391 bprintf(bp, " from any"); 1392 if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP)) 1393 bprintf(bp, " to any"); 1394 } 1395 *flags |= want; 1396} 1397 1398static void 1399show_static_rule(struct cmdline_opts *co, struct format_opts *fo, 1400 struct buf_pr *bp, struct ip_fw_rule *rule, struct ip_fw_bcounter *cntr) 1401{ 1402 static int twidth = 0; 1403 int l; 1404 ipfw_insn *cmd, *has_eaction = NULL, *tagptr = NULL; 1405 const char *comment = NULL; /* ptr to comment if we have one */ 1406 int proto = 0; /* default */ 1407 int flags = 0; /* prerequisites */ 1408 ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */ 1409 ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */ 1410 int or_block = 0; /* we are in an or block */ 1411 uint32_t uval; 1412 1413 if ((fo->set_mask & (1 << rule->set)) == 0) { 1414 /* disabled mask */ 1415 if (!co->show_sets) 1416 return; 1417 else 1418 bprintf(bp, "# DISABLED "); 1419 } 1420 bprintf(bp, "%05u ", rule->rulenum); 1421 1422 /* Print counters if enabled */ 1423 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 1424 pr_u64(bp, &cntr->pcnt, fo->pcwidth); 1425 pr_u64(bp, &cntr->bcnt, fo->bcwidth); 1426 } 1427 1428 if (co->do_time == 2) 1429 bprintf(bp, "%10u ", cntr->timestamp); 1430 else if (co->do_time == 1) { 1431 char timestr[30]; 1432 time_t t = (time_t)0; 1433 1434 if (twidth == 0) { 1435 strcpy(timestr, ctime(&t)); 1436 *strchr(timestr, '\n') = '\0'; 1437 twidth = strlen(timestr); 1438 } 1439 if (cntr->timestamp > 0) { 1440 t = _long_to_time(cntr->timestamp); 1441 1442 strcpy(timestr, ctime(&t)); 1443 *strchr(timestr, '\n') = '\0'; 1444 bprintf(bp, "%s ", timestr); 1445 } else { 1446 bprintf(bp, "%*s", twidth, " "); 1447 } 1448 } 1449 1450 if (co->show_sets) 1451 bprintf(bp, "set %d ", rule->set); 1452 1453 /* 1454 * print the optional "match probability" 1455 */ 1456 if (rule->cmd_len > 0) { 1457 cmd = rule->cmd ; 1458 if (cmd->opcode == O_PROB) { 1459 ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd; 1460 double d = 1.0 * p->d[0]; 1461 1462 d = (d / 0x7fffffff); 1463 bprintf(bp, "prob %f ", d); 1464 } 1465 } 1466 1467 /* 1468 * first print actions 1469 */ 1470 for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule); 1471 l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) { 1472 switch(cmd->opcode) { 1473 case O_CHECK_STATE: 1474 bprintf(bp, "check-state"); 1475 /* avoid printing anything else */ 1476 flags = HAVE_PROTO | HAVE_SRCIP | 1477 HAVE_DSTIP | HAVE_IP; 1478 break; 1479 1480 case O_ACCEPT: 1481 bprintf(bp, "allow"); 1482 break; 1483 1484 case O_COUNT: 1485 bprintf(bp, "count"); 1486 break; 1487 1488 case O_DENY: 1489 bprintf(bp, "deny"); 1490 break; 1491 1492 case O_REJECT: 1493 if (cmd->arg1 == ICMP_REJECT_RST) 1494 bprintf(bp, "reset"); 1495 else if (cmd->arg1 == ICMP_UNREACH_HOST) 1496 bprintf(bp, "reject"); 1497 else 1498 print_reject_code(bp, cmd->arg1); 1499 break; 1500 1501 case O_UNREACH6: 1502 if (cmd->arg1 == ICMP6_UNREACH_RST) 1503 bprintf(bp, "reset6"); 1504 else 1505 print_unreach6_code(bp, cmd->arg1); 1506 break; 1507 1508 case O_SKIPTO: 1509 bprint_uint_arg(bp, "skipto ", cmd->arg1); 1510 break; 1511 1512 case O_PIPE: 1513 bprint_uint_arg(bp, "pipe ", cmd->arg1); 1514 break; 1515 1516 case O_QUEUE: 1517 bprint_uint_arg(bp, "queue ", cmd->arg1); 1518 break; 1519 1520 case O_DIVERT: 1521 bprint_uint_arg(bp, "divert ", cmd->arg1); 1522 break; 1523 1524 case O_TEE: 1525 bprint_uint_arg(bp, "tee ", cmd->arg1); 1526 break; 1527 1528 case O_NETGRAPH: 1529 bprint_uint_arg(bp, "netgraph ", cmd->arg1); 1530 break; 1531 1532 case O_NGTEE: 1533 bprint_uint_arg(bp, "ngtee ", cmd->arg1); 1534 break; 1535 1536 case O_FORWARD_IP: 1537 { 1538 ipfw_insn_sa *s = (ipfw_insn_sa *)cmd; 1539 1540 if (s->sa.sin_addr.s_addr == INADDR_ANY) { 1541 bprintf(bp, "fwd tablearg"); 1542 } else { 1543 bprintf(bp, "fwd %s",inet_ntoa(s->sa.sin_addr)); 1544 } 1545 if (s->sa.sin_port) 1546 bprintf(bp, ",%d", s->sa.sin_port); 1547 } 1548 break; 1549 1550 case O_FORWARD_IP6: 1551 { 1552 char buf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2]; 1553 ipfw_insn_sa6 *s = (ipfw_insn_sa6 *)cmd; 1554 1555 bprintf(bp, "fwd "); 1556 if (getnameinfo((const struct sockaddr *)&s->sa, 1557 sizeof(struct sockaddr_in6), buf, sizeof(buf), 1558 NULL, 0, NI_NUMERICHOST) == 0) 1559 bprintf(bp, "%s", buf); 1560 if (s->sa.sin6_port) 1561 bprintf(bp, ",%d", s->sa.sin6_port); 1562 } 1563 break; 1564 1565 case O_LOG: /* O_LOG is printed last */ 1566 logptr = (ipfw_insn_log *)cmd; 1567 break; 1568 1569 case O_ALTQ: /* O_ALTQ is printed after O_LOG */ 1570 altqptr = (ipfw_insn_altq *)cmd; 1571 break; 1572 1573 case O_TAG: 1574 tagptr = cmd; 1575 break; 1576 1577 case O_NAT: 1578 if (cmd->arg1 != IP_FW_NAT44_GLOBAL) 1579 bprint_uint_arg(bp, "nat ", cmd->arg1); 1580 else 1581 bprintf(bp, "nat global"); 1582 break; 1583 1584 case O_SETFIB: 1585 if (cmd->arg1 == IP_FW_TARG) 1586 bprint_uint_arg(bp, "setfib ", cmd->arg1); 1587 else 1588 bprintf(bp, "setfib %u", cmd->arg1 & 0x7FFF); 1589 break; 1590 1591 case O_EXTERNAL_ACTION: { 1592 const char *ename; 1593 1594 /* 1595 * The external action can consists of two following 1596 * each other opcodes - O_EXTERNAL_ACTION and 1597 * O_EXTERNAL_INSTANCE. The first contains the ID of 1598 * name of external action. The second contains the ID 1599 * of name of external action instance. 1600 * NOTE: in case when external action has no named 1601 * instances support, the second opcode isn't needed. 1602 */ 1603 has_eaction = cmd; 1604 ename = object_search_ctlv(fo->tstate, cmd->arg1, 1605 IPFW_TLV_EACTION); 1606 if (match_token(rule_eactions, ename) != -1) 1607 bprintf(bp, "%s", ename); 1608 else 1609 bprintf(bp, "eaction %s", ename); 1610 break; 1611 } 1612 1613 case O_EXTERNAL_INSTANCE: { 1614 const char *ename; 1615 1616 if (has_eaction == NULL) 1617 break; 1618 /* 1619 * XXX: we need to teach ipfw(9) to rewrite opcodes 1620 * in the user buffer on rule addition. When we add 1621 * the rule, we specify zero TLV type for 1622 * O_EXTERNAL_INSTANCE object. To show correct 1623 * rule after `ipfw add` we need to search instance 1624 * name with zero type. But when we do `ipfw show` 1625 * we calculate TLV type using IPFW_TLV_EACTION_NAME() 1626 * macro. 1627 */ 1628 ename = object_search_ctlv(fo->tstate, cmd->arg1, 0); 1629 if (ename == NULL) 1630 ename = object_search_ctlv(fo->tstate, 1631 cmd->arg1, 1632 IPFW_TLV_EACTION_NAME(has_eaction->arg1)); 1633 bprintf(bp, " %s", ename); 1634 break; 1635 } 1636 1637 case O_SETDSCP: 1638 { 1639 const char *code; 1640 1641 if (cmd->arg1 == IP_FW_TARG) { 1642 bprint_uint_arg(bp, "setdscp ", cmd->arg1); 1643 break; 1644 } 1645 uval = cmd->arg1 & 0x3F; 1646 if ((code = match_value(f_ipdscp, uval)) != NULL) 1647 bprintf(bp, "setdscp %s", code); 1648 else 1649 bprint_uint_arg(bp, "setdscp ", uval); 1650 } 1651 break; 1652 1653 case O_REASS: 1654 bprintf(bp, "reass"); 1655 break; 1656 1657 case O_CALLRETURN: 1658 if (cmd->len & F_NOT) 1659 bprintf(bp, "return"); 1660 else 1661 bprint_uint_arg(bp, "call ", cmd->arg1); 1662 break; 1663 1664 default: 1665 bprintf(bp, "** unrecognized action %d len %d ", 1666 cmd->opcode, cmd->len); 1667 } 1668 } 1669 if (logptr) { 1670 if (logptr->max_log > 0) 1671 bprintf(bp, " log logamount %d", logptr->max_log); 1672 else 1673 bprintf(bp, " log"); 1674 } 1675#ifndef NO_ALTQ 1676 if (altqptr) { 1677 print_altq_cmd(bp, altqptr); 1678 } 1679#endif 1680 if (tagptr) { 1681 if (tagptr->len & F_NOT) 1682 bprint_uint_arg(bp, " untag ", tagptr->arg1); 1683 else 1684 bprint_uint_arg(bp, " tag ", tagptr->arg1); 1685 } 1686 1687 /* 1688 * then print the body. 1689 */ 1690 for (l = rule->act_ofs, cmd = rule->cmd; 1691 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1692 if ((cmd->len & F_OR) || (cmd->len & F_NOT)) 1693 continue; 1694 if (cmd->opcode == O_IP4) { 1695 flags |= HAVE_PROTO4; 1696 break; 1697 } else if (cmd->opcode == O_IP6) { 1698 flags |= HAVE_PROTO6; 1699 break; 1700 } 1701 } 1702 if (rule->flags & IPFW_RULE_NOOPT) { /* empty rules before options */ 1703 if (!co->do_compact) { 1704 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1705 bprintf(bp, " from any to any"); 1706 } 1707 flags |= HAVE_IP | HAVE_OPTIONS | HAVE_PROTO | 1708 HAVE_SRCIP | HAVE_DSTIP; 1709 } 1710 1711 if (co->comment_only) 1712 comment = "..."; 1713 1714 for (l = rule->act_ofs, cmd = rule->cmd; 1715 l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) { 1716 /* useful alias */ 1717 ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd; 1718 1719 if (co->comment_only) { 1720 if (cmd->opcode != O_NOP) 1721 continue; 1722 bprintf(bp, " // %s\n", (char *)(cmd + 1)); 1723 return; 1724 } 1725 1726 show_prerequisites(bp, &flags, 0, cmd->opcode); 1727 1728 switch(cmd->opcode) { 1729 case O_PROB: 1730 break; /* done already */ 1731 1732 case O_PROBE_STATE: 1733 break; /* no need to print anything here */ 1734 1735 case O_IP_SRC: 1736 case O_IP_SRC_LOOKUP: 1737 case O_IP_SRC_MASK: 1738 case O_IP_SRC_ME: 1739 case O_IP_SRC_SET: 1740 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1741 if (!(flags & HAVE_SRCIP)) 1742 bprintf(bp, " from"); 1743 if ((cmd->len & F_OR) && !or_block) 1744 bprintf(bp, " {"); 1745 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1746 (flags & HAVE_OPTIONS) ? " src-ip" : ""); 1747 flags |= HAVE_SRCIP; 1748 break; 1749 1750 case O_IP_DST: 1751 case O_IP_DST_LOOKUP: 1752 case O_IP_DST_MASK: 1753 case O_IP_DST_ME: 1754 case O_IP_DST_SET: 1755 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1756 if (!(flags & HAVE_DSTIP)) 1757 bprintf(bp, " to"); 1758 if ((cmd->len & F_OR) && !or_block) 1759 bprintf(bp, " {"); 1760 print_ip(bp, fo, (ipfw_insn_ip *)cmd, 1761 (flags & HAVE_OPTIONS) ? " dst-ip" : ""); 1762 flags |= HAVE_DSTIP; 1763 break; 1764 1765 case O_IP6_SRC: 1766 case O_IP6_SRC_MASK: 1767 case O_IP6_SRC_ME: 1768 show_prerequisites(bp, &flags, HAVE_PROTO, 0); 1769 if (!(flags & HAVE_SRCIP)) 1770 bprintf(bp, " from"); 1771 if ((cmd->len & F_OR) && !or_block) 1772 bprintf(bp, " {"); 1773 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1774 (flags & HAVE_OPTIONS) ? " src-ip6" : ""); 1775 flags |= HAVE_SRCIP | HAVE_PROTO; 1776 break; 1777 1778 case O_IP6_DST: 1779 case O_IP6_DST_MASK: 1780 case O_IP6_DST_ME: 1781 show_prerequisites(bp, &flags, HAVE_PROTO|HAVE_SRCIP, 0); 1782 if (!(flags & HAVE_DSTIP)) 1783 bprintf(bp, " to"); 1784 if ((cmd->len & F_OR) && !or_block) 1785 bprintf(bp, " {"); 1786 print_ip6(bp, (ipfw_insn_ip6 *)cmd, 1787 (flags & HAVE_OPTIONS) ? " dst-ip6" : ""); 1788 flags |= HAVE_DSTIP; 1789 break; 1790 1791 case O_FLOW6ID: 1792 print_flow6id(bp, (ipfw_insn_u32 *) cmd ); 1793 flags |= HAVE_OPTIONS; 1794 break; 1795 1796 case O_IP_DSTPORT: 1797 show_prerequisites(bp, &flags, 1798 HAVE_PROTO | HAVE_SRCIP | 1799 HAVE_DSTIP | HAVE_IP, 0); 1800 case O_IP_SRCPORT: 1801 if (flags & HAVE_DSTIP) 1802 flags |= HAVE_IP; 1803 show_prerequisites(bp, &flags, 1804 HAVE_PROTO | HAVE_SRCIP, 0); 1805 if ((cmd->len & F_OR) && !or_block) 1806 bprintf(bp, " {"); 1807 if (cmd->len & F_NOT) 1808 bprintf(bp, " not"); 1809 print_newports(bp, (ipfw_insn_u16 *)cmd, proto, 1810 (flags & HAVE_OPTIONS) ? cmd->opcode : 0); 1811 break; 1812 1813 case O_PROTO: { 1814 struct protoent *pe = NULL; 1815 1816 if ((cmd->len & F_OR) && !or_block) 1817 bprintf(bp, " {"); 1818 if (cmd->len & F_NOT) 1819 bprintf(bp, " not"); 1820 proto = cmd->arg1; 1821 pe = getprotobynumber(cmd->arg1); 1822 if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) && 1823 !(flags & HAVE_PROTO)) 1824 show_prerequisites(bp, &flags, 1825 HAVE_PROTO | HAVE_IP | HAVE_SRCIP | 1826 HAVE_DSTIP | HAVE_OPTIONS, 0); 1827 if (flags & HAVE_OPTIONS) 1828 bprintf(bp, " proto"); 1829 if (pe) 1830 bprintf(bp, " %s", pe->p_name); 1831 else 1832 bprintf(bp, " %u", cmd->arg1); 1833 } 1834 flags |= HAVE_PROTO; 1835 break; 1836 1837 default: /*options ... */ 1838 if (!(cmd->len & (F_OR|F_NOT))) 1839 if (((cmd->opcode == O_IP6) && 1840 (flags & HAVE_PROTO6)) || 1841 ((cmd->opcode == O_IP4) && 1842 (flags & HAVE_PROTO4))) 1843 break; 1844 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | 1845 HAVE_DSTIP | HAVE_IP | HAVE_OPTIONS, 0); 1846 if ((cmd->len & F_OR) && !or_block) 1847 bprintf(bp, " {"); 1848 if (cmd->len & F_NOT && cmd->opcode != O_IN) 1849 bprintf(bp, " not"); 1850 switch(cmd->opcode) { 1851 case O_MACADDR2: { 1852 ipfw_insn_mac *m = (ipfw_insn_mac *)cmd; 1853 1854 bprintf(bp, " MAC"); 1855 print_mac(bp, m->addr, m->mask); 1856 print_mac(bp, m->addr + 6, m->mask + 6); 1857 } 1858 break; 1859 1860 case O_MAC_TYPE: 1861 print_newports(bp, (ipfw_insn_u16 *)cmd, 1862 IPPROTO_ETHERTYPE, cmd->opcode); 1863 break; 1864 1865 1866 case O_FRAG: 1867 bprintf(bp, " frag"); 1868 break; 1869 1870 case O_FIB: 1871 bprintf(bp, " fib %u", cmd->arg1 ); 1872 break; 1873 case O_SOCKARG: 1874 bprintf(bp, " sockarg"); 1875 break; 1876 1877 case O_IN: 1878 bprintf(bp, cmd->len & F_NOT ? " out" : " in"); 1879 break; 1880 1881 case O_DIVERTED: 1882 switch (cmd->arg1) { 1883 case 3: 1884 bprintf(bp, " diverted"); 1885 break; 1886 case 1: 1887 bprintf(bp, " diverted-loopback"); 1888 break; 1889 case 2: 1890 bprintf(bp, " diverted-output"); 1891 break; 1892 default: 1893 bprintf(bp, " diverted-?<%u>", cmd->arg1); 1894 break; 1895 } 1896 break; 1897 1898 case O_LAYER2: 1899 bprintf(bp, " layer2"); 1900 break; 1901 case O_XMIT: 1902 case O_RECV: 1903 case O_VIA: 1904 { 1905 char const *s, *t; 1906 ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd; 1907 1908 if (cmd->opcode == O_XMIT) 1909 s = "xmit"; 1910 else if (cmd->opcode == O_RECV) 1911 s = "recv"; 1912 else /* if (cmd->opcode == O_VIA) */ 1913 s = "via"; 1914 if (cmdif->name[0] == '\0') 1915 bprintf(bp, " %s %s", s, 1916 inet_ntoa(cmdif->p.ip)); 1917 else if (cmdif->name[0] == '\1') { 1918 /* interface table */ 1919 t = table_search_ctlv(fo->tstate, 1920 cmdif->p.kidx); 1921 bprintf(bp, " %s table(%s)", s, t); 1922 } else 1923 bprintf(bp, " %s %s", s, cmdif->name); 1924 1925 break; 1926 } 1927 case O_IP_FLOW_LOOKUP: 1928 { 1929 char *t; 1930 1931 t = table_search_ctlv(fo->tstate, cmd->arg1); 1932 bprintf(bp, " flow table(%s", t); 1933 if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) 1934 bprintf(bp, ",%u", 1935 ((ipfw_insn_u32 *)cmd)->d[0]); 1936 bprintf(bp, ")"); 1937 break; 1938 } 1939 case O_IPID: 1940 if (F_LEN(cmd) == 1) 1941 bprintf(bp, " ipid %u", cmd->arg1 ); 1942 else 1943 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1944 O_IPID); 1945 break; 1946 1947 case O_IPTTL: 1948 if (F_LEN(cmd) == 1) 1949 bprintf(bp, " ipttl %u", cmd->arg1 ); 1950 else 1951 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1952 O_IPTTL); 1953 break; 1954 1955 case O_IPVER: 1956 bprintf(bp, " ipver %u", cmd->arg1 ); 1957 break; 1958 1959 case O_IPPRECEDENCE: 1960 bprintf(bp, " ipprecedence %u", cmd->arg1 >> 5); 1961 break; 1962 1963 case O_DSCP: 1964 print_dscp(bp, (ipfw_insn_u32 *)cmd); 1965 break; 1966 1967 case O_IPLEN: 1968 if (F_LEN(cmd) == 1) 1969 bprintf(bp, " iplen %u", cmd->arg1 ); 1970 else 1971 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1972 O_IPLEN); 1973 break; 1974 1975 case O_IPOPT: 1976 print_flags(bp, "ipoptions", cmd, f_ipopts); 1977 break; 1978 1979 case O_IPTOS: 1980 print_flags(bp, "iptos", cmd, f_iptos); 1981 break; 1982 1983 case O_ICMPTYPE: 1984 print_icmptypes(bp, (ipfw_insn_u32 *)cmd); 1985 break; 1986 1987 case O_ESTAB: 1988 bprintf(bp, " established"); 1989 break; 1990 1991 case O_TCPDATALEN: 1992 if (F_LEN(cmd) == 1) 1993 bprintf(bp, " tcpdatalen %u", cmd->arg1 ); 1994 else 1995 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 1996 O_TCPDATALEN); 1997 break; 1998 1999 case O_TCPFLAGS: 2000 print_flags(bp, "tcpflags", cmd, f_tcpflags); 2001 break; 2002 2003 case O_TCPOPTS: 2004 print_flags(bp, "tcpoptions", cmd, f_tcpopts); 2005 break; 2006 2007 case O_TCPWIN: 2008 if (F_LEN(cmd) == 1) 2009 bprintf(bp, " tcpwin %u", cmd->arg1); 2010 else 2011 print_newports(bp, (ipfw_insn_u16 *)cmd, 0, 2012 O_TCPWIN); 2013 break; 2014 2015 case O_TCPACK: 2016 bprintf(bp, " tcpack %d", ntohl(cmd32->d[0])); 2017 break; 2018 2019 case O_TCPSEQ: 2020 bprintf(bp, " tcpseq %d", ntohl(cmd32->d[0])); 2021 break; 2022 2023 case O_UID: 2024 { 2025 struct passwd *pwd = getpwuid(cmd32->d[0]); 2026 2027 if (pwd) 2028 bprintf(bp, " uid %s", pwd->pw_name); 2029 else 2030 bprintf(bp, " uid %u", cmd32->d[0]); 2031 } 2032 break; 2033 2034 case O_GID: 2035 { 2036 struct group *grp = getgrgid(cmd32->d[0]); 2037 2038 if (grp) 2039 bprintf(bp, " gid %s", grp->gr_name); 2040 else 2041 bprintf(bp, " gid %u", cmd32->d[0]); 2042 } 2043 break; 2044 2045 case O_JAIL: 2046 bprintf(bp, " jail %d", cmd32->d[0]); 2047 break; 2048 2049 case O_VERREVPATH: 2050 bprintf(bp, " verrevpath"); 2051 break; 2052 2053 case O_VERSRCREACH: 2054 bprintf(bp, " versrcreach"); 2055 break; 2056 2057 case O_ANTISPOOF: 2058 bprintf(bp, " antispoof"); 2059 break; 2060 2061 case O_IPSEC: 2062 bprintf(bp, " ipsec"); 2063 break; 2064 2065 case O_NOP: 2066 comment = (char *)(cmd + 1); 2067 break; 2068 2069 case O_KEEP_STATE: 2070 bprintf(bp, " keep-state"); 2071 break; 2072 2073 case O_LIMIT: { 2074 struct _s_x *p = limit_masks; 2075 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 2076 uint8_t x = c->limit_mask; 2077 char const *comma = " "; 2078 2079 bprintf(bp, " limit"); 2080 for (; p->x != 0 ; p++) 2081 if ((x & p->x) == p->x) { 2082 x &= ~p->x; 2083 bprintf(bp, "%s%s", comma,p->s); 2084 comma = ","; 2085 } 2086 bprint_uint_arg(bp, " ", c->conn_limit); 2087 break; 2088 } 2089 2090 case O_IP6: 2091 bprintf(bp, " ip6"); 2092 break; 2093 2094 case O_IP4: 2095 bprintf(bp, " ip4"); 2096 break; 2097 2098 case O_ICMP6TYPE: 2099 print_icmp6types(bp, (ipfw_insn_u32 *)cmd); 2100 break; 2101 2102 case O_EXT_HDR: 2103 print_ext6hdr(bp, (ipfw_insn *)cmd); 2104 break; 2105 2106 case O_TAGGED: 2107 if (F_LEN(cmd) == 1) 2108 bprint_uint_arg(bp, " tagged ", 2109 cmd->arg1); 2110 else 2111 print_newports(bp, (ipfw_insn_u16 *)cmd, 2112 0, O_TAGGED); 2113 break; 2114 2115 default: 2116 bprintf(bp, " [opcode %d len %d]", 2117 cmd->opcode, cmd->len); 2118 } 2119 } 2120 if (cmd->len & F_OR) { 2121 bprintf(bp, " or"); 2122 or_block = 1; 2123 } else if (or_block) { 2124 bprintf(bp, " }"); 2125 or_block = 0; 2126 } 2127 } 2128 show_prerequisites(bp, &flags, HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP 2129 | HAVE_IP, 0); 2130 if (comment) 2131 bprintf(bp, " // %s", comment); 2132 bprintf(bp, "\n"); 2133} 2134 2135static void 2136show_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2137 struct buf_pr *bp, ipfw_dyn_rule *d) 2138{ 2139 struct protoent *pe; 2140 struct in_addr a; 2141 uint16_t rulenum; 2142 char buf[INET6_ADDRSTRLEN]; 2143 2144 if (!co->do_expired) { 2145 if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT)) 2146 return; 2147 } 2148 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2149 bprintf(bp, "%05d", rulenum); 2150 if (fo->pcwidth > 0 || fo->bcwidth > 0) { 2151 bprintf(bp, " "); 2152 pr_u64(bp, &d->pcnt, fo->pcwidth); 2153 pr_u64(bp, &d->bcnt, fo->bcwidth); 2154 bprintf(bp, "(%ds)", d->expire); 2155 } 2156 switch (d->dyn_type) { 2157 case O_LIMIT_PARENT: 2158 bprintf(bp, " PARENT %d", d->count); 2159 break; 2160 case O_LIMIT: 2161 bprintf(bp, " LIMIT"); 2162 break; 2163 case O_KEEP_STATE: /* bidir, no mask */ 2164 bprintf(bp, " STATE"); 2165 break; 2166 } 2167 2168 if ((pe = getprotobynumber(d->id.proto)) != NULL) 2169 bprintf(bp, " %s", pe->p_name); 2170 else 2171 bprintf(bp, " proto %u", d->id.proto); 2172 2173 if (d->id.addr_type == 4) { 2174 a.s_addr = htonl(d->id.src_ip); 2175 bprintf(bp, " %s %d", inet_ntoa(a), d->id.src_port); 2176 2177 a.s_addr = htonl(d->id.dst_ip); 2178 bprintf(bp, " <-> %s %d", inet_ntoa(a), d->id.dst_port); 2179 } else if (d->id.addr_type == 6) { 2180 bprintf(bp, " %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf, 2181 sizeof(buf)), d->id.src_port); 2182 bprintf(bp, " <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, 2183 buf, sizeof(buf)), d->id.dst_port); 2184 } else 2185 bprintf(bp, " UNKNOWN <-> UNKNOWN\n"); 2186} 2187 2188static int 2189do_range_cmd(int cmd, ipfw_range_tlv *rt) 2190{ 2191 ipfw_range_header rh; 2192 size_t sz; 2193 2194 memset(&rh, 0, sizeof(rh)); 2195 memcpy(&rh.range, rt, sizeof(*rt)); 2196 rh.range.head.length = sizeof(*rt); 2197 rh.range.head.type = IPFW_TLV_RANGE; 2198 sz = sizeof(rh); 2199 2200 if (do_get3(cmd, &rh.opheader, &sz) != 0) 2201 return (-1); 2202 /* Save number of matched objects */ 2203 rt->new_set = rh.range.new_set; 2204 return (0); 2205} 2206 2207/* 2208 * This one handles all set-related commands 2209 * ipfw set { show | enable | disable } 2210 * ipfw set swap X Y 2211 * ipfw set move X to Y 2212 * ipfw set move rule X to Y 2213 */ 2214void 2215ipfw_sets_handler(char *av[]) 2216{ 2217 uint32_t masks[2]; 2218 int i; 2219 uint8_t cmd, rulenum; 2220 ipfw_range_tlv rt; 2221 char *msg; 2222 size_t size; 2223 2224 av++; 2225 memset(&rt, 0, sizeof(rt)); 2226 2227 if (av[0] == NULL) 2228 errx(EX_USAGE, "set needs command"); 2229 if (_substrcmp(*av, "show") == 0) { 2230 struct format_opts fo; 2231 ipfw_cfg_lheader *cfg; 2232 2233 memset(&fo, 0, sizeof(fo)); 2234 if (ipfw_get_config(&co, &fo, &cfg, &size) != 0) 2235 err(EX_OSERR, "requesting config failed"); 2236 2237 for (i = 0, msg = "disable"; i < RESVD_SET; i++) 2238 if ((cfg->set_mask & (1<<i)) == 0) { 2239 printf("%s %d", msg, i); 2240 msg = ""; 2241 } 2242 msg = (cfg->set_mask != (uint32_t)-1) ? " enable" : "enable"; 2243 for (i = 0; i < RESVD_SET; i++) 2244 if ((cfg->set_mask & (1<<i)) != 0) { 2245 printf("%s %d", msg, i); 2246 msg = ""; 2247 } 2248 printf("\n"); 2249 free(cfg); 2250 } else if (_substrcmp(*av, "swap") == 0) { 2251 av++; 2252 if ( av[0] == NULL || av[1] == NULL ) 2253 errx(EX_USAGE, "set swap needs 2 set numbers\n"); 2254 rt.set = atoi(av[0]); 2255 rt.new_set = atoi(av[1]); 2256 if (!isdigit(*(av[0])) || rt.set > RESVD_SET) 2257 errx(EX_DATAERR, "invalid set number %s\n", av[0]); 2258 if (!isdigit(*(av[1])) || rt.new_set > RESVD_SET) 2259 errx(EX_DATAERR, "invalid set number %s\n", av[1]); 2260 i = do_range_cmd(IP_FW_SET_SWAP, &rt); 2261 } else if (_substrcmp(*av, "move") == 0) { 2262 av++; 2263 if (av[0] && _substrcmp(*av, "rule") == 0) { 2264 rt.flags = IPFW_RCFLAG_RANGE; /* move rules to new set */ 2265 cmd = IP_FW_XMOVE; 2266 av++; 2267 } else 2268 cmd = IP_FW_SET_MOVE; /* Move set to new one */ 2269 if (av[0] == NULL || av[1] == NULL || av[2] == NULL || 2270 av[3] != NULL || _substrcmp(av[1], "to") != 0) 2271 errx(EX_USAGE, "syntax: set move [rule] X to Y\n"); 2272 rulenum = atoi(av[0]); 2273 rt.new_set = atoi(av[2]); 2274 if (cmd == IP_FW_XMOVE) { 2275 rt.start_rule = rulenum; 2276 rt.end_rule = rulenum; 2277 } else 2278 rt.set = rulenum; 2279 rt.new_set = atoi(av[2]); 2280 if (!isdigit(*(av[0])) || (cmd == 3 && rt.set > RESVD_SET) || 2281 (cmd == 2 && rt.start_rule == IPFW_DEFAULT_RULE) ) 2282 errx(EX_DATAERR, "invalid source number %s\n", av[0]); 2283 if (!isdigit(*(av[2])) || rt.new_set > RESVD_SET) 2284 errx(EX_DATAERR, "invalid dest. set %s\n", av[1]); 2285 i = do_range_cmd(cmd, &rt); 2286 if (i < 0) 2287 err(EX_OSERR, "failed to move %s", 2288 cmd == IP_FW_SET_MOVE ? "set": "rule"); 2289 } else if (_substrcmp(*av, "disable") == 0 || 2290 _substrcmp(*av, "enable") == 0 ) { 2291 int which = _substrcmp(*av, "enable") == 0 ? 1 : 0; 2292 2293 av++; 2294 masks[0] = masks[1] = 0; 2295 2296 while (av[0]) { 2297 if (isdigit(**av)) { 2298 i = atoi(*av); 2299 if (i < 0 || i > RESVD_SET) 2300 errx(EX_DATAERR, 2301 "invalid set number %d\n", i); 2302 masks[which] |= (1<<i); 2303 } else if (_substrcmp(*av, "disable") == 0) 2304 which = 0; 2305 else if (_substrcmp(*av, "enable") == 0) 2306 which = 1; 2307 else 2308 errx(EX_DATAERR, 2309 "invalid set command %s\n", *av); 2310 av++; 2311 } 2312 if ( (masks[0] & masks[1]) != 0 ) 2313 errx(EX_DATAERR, 2314 "cannot enable and disable the same set\n"); 2315 2316 rt.set = masks[0]; 2317 rt.new_set = masks[1]; 2318 i = do_range_cmd(IP_FW_SET_ENABLE, &rt); 2319 if (i) 2320 warn("set enable/disable: setsockopt(IP_FW_SET_ENABLE)"); 2321 } else 2322 errx(EX_USAGE, "invalid set command %s\n", *av); 2323} 2324 2325void 2326ipfw_sysctl_handler(char *av[], int which) 2327{ 2328 av++; 2329 2330 if (av[0] == NULL) { 2331 warnx("missing keyword to enable/disable\n"); 2332 } else if (_substrcmp(*av, "firewall") == 0) { 2333 sysctlbyname("net.inet.ip.fw.enable", NULL, 0, 2334 &which, sizeof(which)); 2335 sysctlbyname("net.inet6.ip6.fw.enable", NULL, 0, 2336 &which, sizeof(which)); 2337 } else if (_substrcmp(*av, "one_pass") == 0) { 2338 sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0, 2339 &which, sizeof(which)); 2340 } else if (_substrcmp(*av, "debug") == 0) { 2341 sysctlbyname("net.inet.ip.fw.debug", NULL, 0, 2342 &which, sizeof(which)); 2343 } else if (_substrcmp(*av, "verbose") == 0) { 2344 sysctlbyname("net.inet.ip.fw.verbose", NULL, 0, 2345 &which, sizeof(which)); 2346 } else if (_substrcmp(*av, "dyn_keepalive") == 0) { 2347 sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0, 2348 &which, sizeof(which)); 2349#ifndef NO_ALTQ 2350 } else if (_substrcmp(*av, "altq") == 0) { 2351 altq_set_enabled(which); 2352#endif 2353 } else { 2354 warnx("unrecognize enable/disable keyword: %s\n", *av); 2355 } 2356} 2357 2358typedef void state_cb(struct cmdline_opts *co, struct format_opts *fo, 2359 void *arg, void *state); 2360 2361static void 2362prepare_format_dyn(struct cmdline_opts *co, struct format_opts *fo, 2363 void *arg, void *_state) 2364{ 2365 ipfw_dyn_rule *d; 2366 int width; 2367 uint8_t set; 2368 2369 d = (ipfw_dyn_rule *)_state; 2370 /* Count _ALL_ states */ 2371 fo->dcnt++; 2372 2373 if (fo->show_counters == 0) 2374 return; 2375 2376 if (co->use_set) { 2377 /* skip states from another set */ 2378 bcopy((char *)&d->rule + sizeof(uint16_t), &set, 2379 sizeof(uint8_t)); 2380 if (set != co->use_set - 1) 2381 return; 2382 } 2383 2384 width = pr_u64(NULL, &d->pcnt, 0); 2385 if (width > fo->pcwidth) 2386 fo->pcwidth = width; 2387 2388 width = pr_u64(NULL, &d->bcnt, 0); 2389 if (width > fo->bcwidth) 2390 fo->bcwidth = width; 2391} 2392 2393static int 2394foreach_state(struct cmdline_opts *co, struct format_opts *fo, 2395 caddr_t base, size_t sz, state_cb dyn_bc, void *dyn_arg) 2396{ 2397 int ttype; 2398 state_cb *fptr; 2399 void *farg; 2400 ipfw_obj_tlv *tlv; 2401 ipfw_obj_ctlv *ctlv; 2402 2403 fptr = NULL; 2404 ttype = 0; 2405 2406 while (sz > 0) { 2407 ctlv = (ipfw_obj_ctlv *)base; 2408 switch (ctlv->head.type) { 2409 case IPFW_TLV_DYNSTATE_LIST: 2410 base += sizeof(*ctlv); 2411 sz -= sizeof(*ctlv); 2412 ttype = IPFW_TLV_DYN_ENT; 2413 fptr = dyn_bc; 2414 farg = dyn_arg; 2415 break; 2416 default: 2417 return (sz); 2418 } 2419 2420 while (sz > 0) { 2421 tlv = (ipfw_obj_tlv *)base; 2422 if (tlv->type != ttype) 2423 break; 2424 2425 fptr(co, fo, farg, tlv + 1); 2426 sz -= tlv->length; 2427 base += tlv->length; 2428 } 2429 } 2430 2431 return (sz); 2432} 2433 2434static void 2435prepare_format_opts(struct cmdline_opts *co, struct format_opts *fo, 2436 ipfw_obj_tlv *rtlv, int rcnt, caddr_t dynbase, size_t dynsz) 2437{ 2438 int bcwidth, pcwidth, width; 2439 int n; 2440 struct ip_fw_bcounter *cntr; 2441 struct ip_fw_rule *r; 2442 2443 bcwidth = 0; 2444 pcwidth = 0; 2445 if (fo->show_counters != 0) { 2446 for (n = 0; n < rcnt; n++, 2447 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2448 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2449 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2450 /* skip rules from another set */ 2451 if (co->use_set && r->set != co->use_set - 1) 2452 continue; 2453 2454 /* packet counter */ 2455 width = pr_u64(NULL, &cntr->pcnt, 0); 2456 if (width > pcwidth) 2457 pcwidth = width; 2458 2459 /* byte counter */ 2460 width = pr_u64(NULL, &cntr->bcnt, 0); 2461 if (width > bcwidth) 2462 bcwidth = width; 2463 } 2464 } 2465 fo->bcwidth = bcwidth; 2466 fo->pcwidth = pcwidth; 2467 2468 fo->dcnt = 0; 2469 if (co->do_dynamic && dynsz > 0) 2470 foreach_state(co, fo, dynbase, dynsz, prepare_format_dyn, NULL); 2471} 2472 2473static int 2474list_static_range(struct cmdline_opts *co, struct format_opts *fo, 2475 struct buf_pr *bp, ipfw_obj_tlv *rtlv, int rcnt) 2476{ 2477 int n, seen; 2478 struct ip_fw_rule *r; 2479 struct ip_fw_bcounter *cntr; 2480 int c = 0; 2481 2482 for (n = seen = 0; n < rcnt; n++, 2483 rtlv = (ipfw_obj_tlv *)((caddr_t)rtlv + rtlv->length)) { 2484 2485 if ((fo->show_counters | fo->show_time) != 0) { 2486 cntr = (struct ip_fw_bcounter *)(rtlv + 1); 2487 r = (struct ip_fw_rule *)((caddr_t)cntr + cntr->size); 2488 } else { 2489 cntr = NULL; 2490 r = (struct ip_fw_rule *)(rtlv + 1); 2491 } 2492 if (r->rulenum > fo->last) 2493 break; 2494 if (co->use_set && r->set != co->use_set - 1) 2495 continue; 2496 if (r->rulenum >= fo->first && r->rulenum <= fo->last) { 2497 show_static_rule(co, fo, bp, r, cntr); 2498 printf("%s", bp->buf); 2499 c += rtlv->length; 2500 bp_flush(bp); 2501 seen++; 2502 } 2503 } 2504 2505 return (seen); 2506} 2507 2508static void 2509list_dyn_state(struct cmdline_opts *co, struct format_opts *fo, 2510 void *_arg, void *_state) 2511{ 2512 uint16_t rulenum; 2513 uint8_t set; 2514 ipfw_dyn_rule *d; 2515 struct buf_pr *bp; 2516 2517 d = (ipfw_dyn_rule *)_state; 2518 bp = (struct buf_pr *)_arg; 2519 2520 bcopy(&d->rule, &rulenum, sizeof(rulenum)); 2521 if (rulenum > fo->last) 2522 return; 2523 if (co->use_set) { 2524 bcopy((char *)&d->rule + sizeof(uint16_t), 2525 &set, sizeof(uint8_t)); 2526 if (set != co->use_set - 1) 2527 return; 2528 } 2529 if (rulenum >= fo->first) { 2530 show_dyn_state(co, fo, bp, d); 2531 printf("%s\n", bp->buf); 2532 bp_flush(bp); 2533 } 2534} 2535 2536static int 2537list_dyn_range(struct cmdline_opts *co, struct format_opts *fo, 2538 struct buf_pr *bp, caddr_t base, size_t sz) 2539{ 2540 2541 sz = foreach_state(co, fo, base, sz, list_dyn_state, bp); 2542 return (sz); 2543} 2544 2545void 2546ipfw_list(int ac, char *av[], int show_counters) 2547{ 2548 ipfw_cfg_lheader *cfg; 2549 struct format_opts sfo; 2550 size_t sz; 2551 int error; 2552 int lac; 2553 char **lav; 2554 uint32_t rnum; 2555 char *endptr; 2556 2557 if (co.test_only) { 2558 fprintf(stderr, "Testing only, list disabled\n"); 2559 return; 2560 } 2561 if (co.do_pipe) { 2562 dummynet_list(ac, av, show_counters); 2563 return; 2564 } 2565 2566 ac--; 2567 av++; 2568 memset(&sfo, 0, sizeof(sfo)); 2569 2570 /* Determine rule range to request */ 2571 if (ac > 0) { 2572 for (lac = ac, lav = av; lac != 0; lac--) { 2573 rnum = strtoul(*lav++, &endptr, 10); 2574 if (sfo.first == 0 || rnum < sfo.first) 2575 sfo.first = rnum; 2576 2577 if (*endptr == '-') 2578 rnum = strtoul(endptr + 1, &endptr, 10); 2579 if (sfo.last == 0 || rnum > sfo.last) 2580 sfo.last = rnum; 2581 } 2582 } 2583 2584 /* get configuraion from kernel */ 2585 cfg = NULL; 2586 sfo.show_counters = show_counters; 2587 sfo.show_time = co.do_time; 2588 sfo.flags = IPFW_CFG_GET_STATIC; 2589 if (co.do_dynamic != 0) 2590 sfo.flags |= IPFW_CFG_GET_STATES; 2591 if ((sfo.show_counters | sfo.show_time) != 0) 2592 sfo.flags |= IPFW_CFG_GET_COUNTERS; 2593 if (ipfw_get_config(&co, &sfo, &cfg, &sz) != 0) 2594 err(EX_OSERR, "retrieving config failed"); 2595 2596 error = ipfw_show_config(&co, &sfo, cfg, sz, ac, av); 2597 2598 free(cfg); 2599 2600 if (error != EX_OK) 2601 exit(error); 2602} 2603 2604static int 2605ipfw_show_config(struct cmdline_opts *co, struct format_opts *fo, 2606 ipfw_cfg_lheader *cfg, size_t sz, int ac, char *av[]) 2607{ 2608 caddr_t dynbase; 2609 size_t dynsz; 2610 int rcnt; 2611 int exitval = EX_OK; 2612 int lac; 2613 char **lav; 2614 char *endptr; 2615 size_t readsz; 2616 struct buf_pr bp; 2617 ipfw_obj_ctlv *ctlv, *tstate; 2618 ipfw_obj_tlv *rbase; 2619 2620 /* 2621 * Handle tablenames TLV first, if any 2622 */ 2623 tstate = NULL; 2624 rbase = NULL; 2625 dynbase = NULL; 2626 dynsz = 0; 2627 readsz = sizeof(*cfg); 2628 rcnt = 0; 2629 2630 fo->set_mask = cfg->set_mask; 2631 2632 ctlv = (ipfw_obj_ctlv *)(cfg + 1); 2633 2634 if (cfg->flags & IPFW_CFG_GET_STATIC) { 2635 /* We've requested static rules */ 2636 if (ctlv->head.type == IPFW_TLV_TBLNAME_LIST) { 2637 object_sort_ctlv(ctlv); 2638 fo->tstate = ctlv; 2639 readsz += ctlv->head.length; 2640 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2641 ctlv->head.length); 2642 } 2643 2644 if (ctlv->head.type == IPFW_TLV_RULE_LIST) { 2645 rbase = (ipfw_obj_tlv *)(ctlv + 1); 2646 rcnt = ctlv->count; 2647 readsz += ctlv->head.length; 2648 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + 2649 ctlv->head.length); 2650 } 2651 } 2652 2653 if ((cfg->flags & IPFW_CFG_GET_STATES) && (readsz != sz)) { 2654 /* We may have some dynamic states */ 2655 dynsz = sz - readsz; 2656 /* Skip empty header */ 2657 if (dynsz != sizeof(ipfw_obj_ctlv)) 2658 dynbase = (caddr_t)ctlv; 2659 else 2660 dynsz = 0; 2661 } 2662 2663 prepare_format_opts(co, fo, rbase, rcnt, dynbase, dynsz); 2664 bp_alloc(&bp, 4096); 2665 2666 /* if no rule numbers were specified, list all rules */ 2667 if (ac == 0) { 2668 fo->first = 0; 2669 fo->last = IPFW_DEFAULT_RULE; 2670 list_static_range(co, fo, &bp, rbase, rcnt); 2671 2672 if (co->do_dynamic && dynsz > 0) { 2673 printf("## Dynamic rules (%d %zu):\n", fo->dcnt, dynsz); 2674 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2675 } 2676 2677 bp_free(&bp); 2678 return (EX_OK); 2679 } 2680 2681 /* display specific rules requested on command line */ 2682 for (lac = ac, lav = av; lac != 0; lac--) { 2683 /* convert command line rule # */ 2684 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2685 if (*endptr == '-') 2686 fo->last = strtoul(endptr + 1, &endptr, 10); 2687 if (*endptr) { 2688 exitval = EX_USAGE; 2689 warnx("invalid rule number: %s", *(lav - 1)); 2690 continue; 2691 } 2692 2693 if (list_static_range(co, fo, &bp, rbase, rcnt) == 0) { 2694 /* give precedence to other error(s) */ 2695 if (exitval == EX_OK) 2696 exitval = EX_UNAVAILABLE; 2697 if (fo->first == fo->last) 2698 warnx("rule %u does not exist", fo->first); 2699 else 2700 warnx("no rules in range %u-%u", 2701 fo->first, fo->last); 2702 } 2703 } 2704 2705 if (co->do_dynamic && dynsz > 0) { 2706 printf("## Dynamic rules:\n"); 2707 for (lac = ac, lav = av; lac != 0; lac--) { 2708 fo->last = fo->first = strtoul(*lav++, &endptr, 10); 2709 if (*endptr == '-') 2710 fo->last = strtoul(endptr+1, &endptr, 10); 2711 if (*endptr) 2712 /* already warned */ 2713 continue; 2714 list_dyn_range(co, fo, &bp, dynbase, dynsz); 2715 } 2716 } 2717 2718 bp_free(&bp); 2719 return (exitval); 2720} 2721 2722 2723/* 2724 * Retrieves current ipfw configuration of given type 2725 * and stores its pointer to @pcfg. 2726 * 2727 * Caller is responsible for freeing @pcfg. 2728 * 2729 * Returns 0 on success. 2730 */ 2731 2732static int 2733ipfw_get_config(struct cmdline_opts *co, struct format_opts *fo, 2734 ipfw_cfg_lheader **pcfg, size_t *psize) 2735{ 2736 ipfw_cfg_lheader *cfg; 2737 size_t sz; 2738 int i; 2739 2740 2741 if (co->test_only != 0) { 2742 fprintf(stderr, "Testing only, list disabled\n"); 2743 return (0); 2744 } 2745 2746 /* Start with some data size */ 2747 sz = 4096; 2748 cfg = NULL; 2749 2750 for (i = 0; i < 16; i++) { 2751 if (cfg != NULL) 2752 free(cfg); 2753 if ((cfg = calloc(1, sz)) == NULL) 2754 return (ENOMEM); 2755 2756 cfg->flags = fo->flags; 2757 cfg->start_rule = fo->first; 2758 cfg->end_rule = fo->last; 2759 2760 if (do_get3(IP_FW_XGET, &cfg->opheader, &sz) != 0) { 2761 if (errno != ENOMEM) { 2762 free(cfg); 2763 return (errno); 2764 } 2765 2766 /* Buffer size is not enough. Try to increase */ 2767 sz = sz * 2; 2768 if (sz < cfg->size) 2769 sz = cfg->size; 2770 continue; 2771 } 2772 2773 *pcfg = cfg; 2774 *psize = sz; 2775 return (0); 2776 } 2777 2778 free(cfg); 2779 return (ENOMEM); 2780} 2781 2782static int 2783lookup_host (char *host, struct in_addr *ipaddr) 2784{ 2785 struct hostent *he; 2786 2787 if (!inet_aton(host, ipaddr)) { 2788 if ((he = gethostbyname(host)) == NULL) 2789 return(-1); 2790 *ipaddr = *(struct in_addr *)he->h_addr_list[0]; 2791 } 2792 return(0); 2793} 2794 2795struct tidx { 2796 ipfw_obj_ntlv *idx; 2797 uint32_t count; 2798 uint32_t size; 2799 uint16_t counter; 2800 uint8_t set; 2801}; 2802 2803int 2804ipfw_check_object_name(const char *name) 2805{ 2806 int c, i, l; 2807 2808 /* 2809 * Check that name is null-terminated and contains 2810 * valid symbols only. Valid mask is: 2811 * [a-zA-Z0-9\-_\.]{1,63} 2812 */ 2813 l = strlen(name); 2814 if (l == 0 || l >= 64) 2815 return (EINVAL); 2816 for (i = 0; i < l; i++) { 2817 c = name[i]; 2818 if (isalpha(c) || isdigit(c) || c == '_' || 2819 c == '-' || c == '.') 2820 continue; 2821 return (EINVAL); 2822 } 2823 return (0); 2824} 2825 2826static int 2827eaction_check_name(const char *name) 2828{ 2829 2830 if (ipfw_check_object_name(name) != 0) 2831 return (EINVAL); 2832 /* Restrict some 'special' names */ 2833 if (match_token(rule_actions, name) != -1 && 2834 match_token(rule_action_params, name) != -1) 2835 return (EINVAL); 2836 return (0); 2837} 2838 2839static uint16_t 2840pack_object(struct tidx *tstate, char *name, int otype) 2841{ 2842 int i; 2843 ipfw_obj_ntlv *ntlv; 2844 2845 for (i = 0; i < tstate->count; i++) { 2846 if (strcmp(tstate->idx[i].name, name) != 0) 2847 continue; 2848 if (tstate->idx[i].set != tstate->set) 2849 continue; 2850 if (tstate->idx[i].head.type != otype) 2851 continue; 2852 2853 return (tstate->idx[i].idx); 2854 } 2855 2856 if (tstate->count + 1 > tstate->size) { 2857 tstate->size += 4; 2858 tstate->idx = realloc(tstate->idx, tstate->size * 2859 sizeof(ipfw_obj_ntlv)); 2860 if (tstate->idx == NULL) 2861 return (0); 2862 } 2863 2864 ntlv = &tstate->idx[i]; 2865 memset(ntlv, 0, sizeof(ipfw_obj_ntlv)); 2866 strlcpy(ntlv->name, name, sizeof(ntlv->name)); 2867 ntlv->head.type = otype; 2868 ntlv->head.length = sizeof(ipfw_obj_ntlv); 2869 ntlv->set = tstate->set; 2870 ntlv->idx = ++tstate->counter; 2871 tstate->count++; 2872 2873 return (ntlv->idx); 2874} 2875 2876static uint16_t 2877pack_table(struct tidx *tstate, char *name) 2878{ 2879 2880 if (table_check_name(name) != 0) 2881 return (0); 2882 2883 return (pack_object(tstate, name, IPFW_TLV_TBL_NAME)); 2884} 2885 2886void 2887fill_table(struct _ipfw_insn *cmd, char *av, uint8_t opcode, 2888 struct tidx *tstate) 2889{ 2890 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2891 uint16_t uidx; 2892 char *p; 2893 2894 if ((p = strchr(av + 6, ')')) == NULL) 2895 errx(EX_DATAERR, "forgotten parenthesis: '%s'", av); 2896 *p = '\0'; 2897 p = strchr(av + 6, ','); 2898 if (p) 2899 *p++ = '\0'; 2900 2901 if ((uidx = pack_table(tstate, av + 6)) == 0) 2902 errx(EX_DATAERR, "Invalid table name: %s", av + 6); 2903 2904 cmd->opcode = opcode; 2905 cmd->arg1 = uidx; 2906 if (p) { 2907 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 2908 d[0] = strtoul(p, NULL, 0); 2909 } else 2910 cmd->len |= F_INSN_SIZE(ipfw_insn); 2911} 2912 2913 2914/* 2915 * fills the addr and mask fields in the instruction as appropriate from av. 2916 * Update length as appropriate. 2917 * The following formats are allowed: 2918 * me returns O_IP_*_ME 2919 * 1.2.3.4 single IP address 2920 * 1.2.3.4:5.6.7.8 address:mask 2921 * 1.2.3.4/24 address/mask 2922 * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet 2923 * We can have multiple comma-separated address/mask entries. 2924 */ 2925static void 2926fill_ip(ipfw_insn_ip *cmd, char *av, int cblen, struct tidx *tstate) 2927{ 2928 int len = 0; 2929 uint32_t *d = ((ipfw_insn_u32 *)cmd)->d; 2930 2931 cmd->o.len &= ~F_LEN_MASK; /* zero len */ 2932 2933 if (_substrcmp(av, "any") == 0) 2934 return; 2935 2936 if (_substrcmp(av, "me") == 0) { 2937 cmd->o.len |= F_INSN_SIZE(ipfw_insn); 2938 return; 2939 } 2940 2941 if (strncmp(av, "table(", 6) == 0) { 2942 fill_table(&cmd->o, av, O_IP_DST_LOOKUP, tstate); 2943 return; 2944 } 2945 2946 while (av) { 2947 /* 2948 * After the address we can have '/' or ':' indicating a mask, 2949 * ',' indicating another address follows, '{' indicating a 2950 * set of addresses of unspecified size. 2951 */ 2952 char *t = NULL, *p = strpbrk(av, "/:,{"); 2953 int masklen; 2954 char md, nd = '\0'; 2955 2956 CHECK_LENGTH(cblen, F_INSN_SIZE(ipfw_insn) + 2 + len); 2957 2958 if (p) { 2959 md = *p; 2960 *p++ = '\0'; 2961 if ((t = strpbrk(p, ",{")) != NULL) { 2962 nd = *t; 2963 *t = '\0'; 2964 } 2965 } else 2966 md = '\0'; 2967 2968 if (lookup_host(av, (struct in_addr *)&d[0]) != 0) 2969 errx(EX_NOHOST, "hostname ``%s'' unknown", av); 2970 switch (md) { 2971 case ':': 2972 if (!inet_aton(p, (struct in_addr *)&d[1])) 2973 errx(EX_DATAERR, "bad netmask ``%s''", p); 2974 break; 2975 case '/': 2976 masklen = atoi(p); 2977 if (masklen == 0) 2978 d[1] = htonl(0U); /* mask */ 2979 else if (masklen > 32) 2980 errx(EX_DATAERR, "bad width ``%s''", p); 2981 else 2982 d[1] = htonl(~0U << (32 - masklen)); 2983 break; 2984 case '{': /* no mask, assume /24 and put back the '{' */ 2985 d[1] = htonl(~0U << (32 - 24)); 2986 *(--p) = md; 2987 break; 2988 2989 case ',': /* single address plus continuation */ 2990 *(--p) = md; 2991 /* FALLTHROUGH */ 2992 case 0: /* initialization value */ 2993 default: 2994 d[1] = htonl(~0U); /* force /32 */ 2995 break; 2996 } 2997 d[0] &= d[1]; /* mask base address with mask */ 2998 if (t) 2999 *t = nd; 3000 /* find next separator */ 3001 if (p) 3002 p = strpbrk(p, ",{"); 3003 if (p && *p == '{') { 3004 /* 3005 * We have a set of addresses. They are stored as follows: 3006 * arg1 is the set size (powers of 2, 2..256) 3007 * addr is the base address IN HOST FORMAT 3008 * mask.. is an array of arg1 bits (rounded up to 3009 * the next multiple of 32) with bits set 3010 * for each host in the map. 3011 */ 3012 uint32_t *map = (uint32_t *)&cmd->mask; 3013 int low, high; 3014 int i = contigmask((uint8_t *)&(d[1]), 32); 3015 3016 if (len > 0) 3017 errx(EX_DATAERR, "address set cannot be in a list"); 3018 if (i < 24 || i > 31) 3019 errx(EX_DATAERR, "invalid set with mask %d\n", i); 3020 cmd->o.arg1 = 1<<(32-i); /* map length */ 3021 d[0] = ntohl(d[0]); /* base addr in host format */ 3022 cmd->o.opcode = O_IP_DST_SET; /* default */ 3023 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32; 3024 for (i = 0; i < (cmd->o.arg1+31)/32 ; i++) 3025 map[i] = 0; /* clear map */ 3026 3027 av = p + 1; 3028 low = d[0] & 0xff; 3029 high = low + cmd->o.arg1 - 1; 3030 /* 3031 * Here, i stores the previous value when we specify a range 3032 * of addresses within a mask, e.g. 45-63. i = -1 means we 3033 * have no previous value. 3034 */ 3035 i = -1; /* previous value in a range */ 3036 while (isdigit(*av)) { 3037 char *s; 3038 int a = strtol(av, &s, 0); 3039 3040 if (s == av) { /* no parameter */ 3041 if (*av != '}') 3042 errx(EX_DATAERR, "set not closed\n"); 3043 if (i != -1) 3044 errx(EX_DATAERR, "incomplete range %d-", i); 3045 break; 3046 } 3047 if (a < low || a > high) 3048 errx(EX_DATAERR, "addr %d out of range [%d-%d]\n", 3049 a, low, high); 3050 a -= low; 3051 if (i == -1) /* no previous in range */ 3052 i = a; 3053 else { /* check that range is valid */ 3054 if (i > a) 3055 errx(EX_DATAERR, "invalid range %d-%d", 3056 i+low, a+low); 3057 if (*s == '-') 3058 errx(EX_DATAERR, "double '-' in range"); 3059 } 3060 for (; i <= a; i++) 3061 map[i/32] |= 1<<(i & 31); 3062 i = -1; 3063 if (*s == '-') 3064 i = a; 3065 else if (*s == '}') 3066 break; 3067 av = s+1; 3068 } 3069 return; 3070 } 3071 av = p; 3072 if (av) /* then *av must be a ',' */ 3073 av++; 3074 3075 /* Check this entry */ 3076 if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */ 3077 /* 3078 * 'any' turns the entire list into a NOP. 3079 * 'not any' never matches, so it is removed from the 3080 * list unless it is the only item, in which case we 3081 * report an error. 3082 */ 3083 if (cmd->o.len & F_NOT) { /* "not any" never matches */ 3084 if (av == NULL && len == 0) /* only this entry */ 3085 errx(EX_DATAERR, "not any never matches"); 3086 } 3087 /* else do nothing and skip this entry */ 3088 return; 3089 } 3090 /* A single IP can be stored in an optimized format */ 3091 if (d[1] == (uint32_t)~0 && av == NULL && len == 0) { 3092 cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32); 3093 return; 3094 } 3095 len += 2; /* two words... */ 3096 d += 2; 3097 } /* end while */ 3098 if (len + 1 > F_LEN_MASK) 3099 errx(EX_DATAERR, "address list too long"); 3100 cmd->o.len |= len+1; 3101} 3102 3103 3104/* n2mask sets n bits of the mask */ 3105void 3106n2mask(struct in6_addr *mask, int n) 3107{ 3108 static int minimask[9] = 3109 { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 3110 u_char *p; 3111 3112 memset(mask, 0, sizeof(struct in6_addr)); 3113 p = (u_char *) mask; 3114 for (; n > 0; p++, n -= 8) { 3115 if (n >= 8) 3116 *p = 0xff; 3117 else 3118 *p = minimask[n]; 3119 } 3120 return; 3121} 3122 3123static void 3124fill_flags_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, 3125 struct _s_x *flags, char *p) 3126{ 3127 char *e; 3128 uint32_t set = 0, clear = 0; 3129 3130 if (fill_flags(flags, p, &e, &set, &clear) != 0) 3131 errx(EX_DATAERR, "invalid flag %s", e); 3132 3133 cmd->opcode = opcode; 3134 cmd->len = (cmd->len & (F_NOT | F_OR)) | 1; 3135 cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8); 3136} 3137 3138 3139void 3140ipfw_delete(char *av[]) 3141{ 3142 int i, j; 3143 int exitval = EX_OK; 3144 int do_set = 0; 3145 char *sep; 3146 ipfw_range_tlv rt; 3147 3148 av++; 3149 NEED1("missing rule specification"); 3150 memset(&rt, 0, sizeof(rt)); 3151 if ( *av && _substrcmp(*av, "set") == 0) { 3152 /* Do not allow using the following syntax: 3153 * ipfw set N delete set M 3154 */ 3155 if (co.use_set) 3156 errx(EX_DATAERR, "invalid syntax"); 3157 do_set = 1; /* delete set */ 3158 av++; 3159 } 3160 3161 /* Rule number */ 3162 while (*av && isdigit(**av)) { 3163 i = strtol(*av, &sep, 10); 3164 j = i; 3165 if (*sep== '-') 3166 j = strtol(sep + 1, NULL, 10); 3167 av++; 3168 if (co.do_nat) { 3169 exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i); 3170 if (exitval) { 3171 exitval = EX_UNAVAILABLE; 3172 warn("rule %u not available", i); 3173 } 3174 } else if (co.do_pipe) { 3175 exitval = ipfw_delete_pipe(co.do_pipe, i); 3176 } else { 3177 if (do_set != 0) { 3178 rt.set = i & 31; 3179 rt.flags = IPFW_RCFLAG_SET; 3180 } else { 3181 rt.start_rule = i & 0xffff; 3182 rt.end_rule = j & 0xffff; 3183 if (rt.start_rule == 0 && rt.end_rule == 0) 3184 rt.flags |= IPFW_RCFLAG_ALL; 3185 else 3186 rt.flags |= IPFW_RCFLAG_RANGE; 3187 if (co.use_set != 0) { 3188 rt.set = co.use_set - 1; 3189 rt.flags |= IPFW_RCFLAG_SET; 3190 } 3191 } 3192 i = do_range_cmd(IP_FW_XDEL, &rt); 3193 if (i != 0) { 3194 exitval = EX_UNAVAILABLE; 3195 warn("rule %u: setsockopt(IP_FW_XDEL)", 3196 rt.start_rule); 3197 } else if (rt.new_set == 0) { 3198 exitval = EX_UNAVAILABLE; 3199 if (rt.start_rule != rt.end_rule) 3200 warnx("no rules rules in %u-%u range", 3201 rt.start_rule, rt.end_rule); 3202 else 3203 warnx("rule %u not found", 3204 rt.start_rule); 3205 } 3206 } 3207 } 3208 if (exitval != EX_OK) 3209 exit(exitval); 3210} 3211 3212 3213/* 3214 * fill the interface structure. We do not check the name as we can 3215 * create interfaces dynamically, so checking them at insert time 3216 * makes relatively little sense. 3217 * Interface names containing '*', '?', or '[' are assumed to be shell 3218 * patterns which match interfaces. 3219 */ 3220static void 3221fill_iface(ipfw_insn_if *cmd, char *arg, int cblen, struct tidx *tstate) 3222{ 3223 char *p; 3224 uint16_t uidx; 3225 3226 cmd->name[0] = '\0'; 3227 cmd->o.len |= F_INSN_SIZE(ipfw_insn_if); 3228 3229 CHECK_CMDLEN; 3230 3231 /* Parse the interface or address */ 3232 if (strcmp(arg, "any") == 0) 3233 cmd->o.len = 0; /* effectively ignore this command */ 3234 else if (strncmp(arg, "table(", 6) == 0) { 3235 if ((p = strchr(arg + 6, ')')) == NULL) 3236 errx(EX_DATAERR, "forgotten parenthesis: '%s'", arg); 3237 *p = '\0'; 3238 p = strchr(arg + 6, ','); 3239 if (p) 3240 *p++ = '\0'; 3241 if ((uidx = pack_table(tstate, arg + 6)) == 0) 3242 errx(EX_DATAERR, "Invalid table name: %s", arg + 6); 3243 3244 cmd->name[0] = '\1'; /* Special value indicating table */ 3245 cmd->p.kidx = uidx; 3246 } else if (!isdigit(*arg)) { 3247 strlcpy(cmd->name, arg, sizeof(cmd->name)); 3248 cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0; 3249 } else if (!inet_aton(arg, &cmd->p.ip)) 3250 errx(EX_DATAERR, "bad ip address ``%s''", arg); 3251} 3252 3253static void 3254get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask) 3255{ 3256 int i; 3257 size_t l; 3258 char *ap, *ptr, *optr; 3259 struct ether_addr *mac; 3260 const char *macset = "0123456789abcdefABCDEF:"; 3261 3262 if (strcmp(p, "any") == 0) { 3263 for (i = 0; i < ETHER_ADDR_LEN; i++) 3264 addr[i] = mask[i] = 0; 3265 return; 3266 } 3267 3268 optr = ptr = strdup(p); 3269 if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) { 3270 l = strlen(ap); 3271 if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL) 3272 errx(EX_DATAERR, "Incorrect MAC address"); 3273 bcopy(mac, addr, ETHER_ADDR_LEN); 3274 } else 3275 errx(EX_DATAERR, "Incorrect MAC address"); 3276 3277 if (ptr != NULL) { /* we have mask? */ 3278 if (p[ptr - optr - 1] == '/') { /* mask len */ 3279 long ml = strtol(ptr, &ap, 10); 3280 if (*ap != 0 || ml > ETHER_ADDR_LEN * 8 || ml < 0) 3281 errx(EX_DATAERR, "Incorrect mask length"); 3282 for (i = 0; ml > 0 && i < ETHER_ADDR_LEN; ml -= 8, i++) 3283 mask[i] = (ml >= 8) ? 0xff: (~0) << (8 - ml); 3284 } else { /* mask */ 3285 l = strlen(ptr); 3286 if (strspn(ptr, macset) != l || 3287 (mac = ether_aton(ptr)) == NULL) 3288 errx(EX_DATAERR, "Incorrect mask"); 3289 bcopy(mac, mask, ETHER_ADDR_LEN); 3290 } 3291 } else { /* default mask: ff:ff:ff:ff:ff:ff */ 3292 for (i = 0; i < ETHER_ADDR_LEN; i++) 3293 mask[i] = 0xff; 3294 } 3295 for (i = 0; i < ETHER_ADDR_LEN; i++) 3296 addr[i] &= mask[i]; 3297 3298 free(optr); 3299} 3300 3301/* 3302 * helper function, updates the pointer to cmd with the length 3303 * of the current command, and also cleans up the first word of 3304 * the new command in case it has been clobbered before. 3305 */ 3306static ipfw_insn * 3307next_cmd(ipfw_insn *cmd, int *len) 3308{ 3309 *len -= F_LEN(cmd); 3310 CHECK_LENGTH(*len, 0); 3311 cmd += F_LEN(cmd); 3312 bzero(cmd, sizeof(*cmd)); 3313 return cmd; 3314} 3315 3316/* 3317 * Takes arguments and copies them into a comment 3318 */ 3319static void 3320fill_comment(ipfw_insn *cmd, char **av, int cblen) 3321{ 3322 int i, l; 3323 char *p = (char *)(cmd + 1); 3324 3325 cmd->opcode = O_NOP; 3326 cmd->len = (cmd->len & (F_NOT | F_OR)); 3327 3328 /* Compute length of comment string. */ 3329 for (i = 0, l = 0; av[i] != NULL; i++) 3330 l += strlen(av[i]) + 1; 3331 if (l == 0) 3332 return; 3333 if (l > 84) 3334 errx(EX_DATAERR, 3335 "comment too long (max 80 chars)"); 3336 l = 1 + (l+3)/4; 3337 cmd->len = (cmd->len & (F_NOT | F_OR)) | l; 3338 CHECK_CMDLEN; 3339 3340 for (i = 0; av[i] != NULL; i++) { 3341 strcpy(p, av[i]); 3342 p += strlen(av[i]); 3343 *p++ = ' '; 3344 } 3345 *(--p) = '\0'; 3346} 3347 3348/* 3349 * A function to fill simple commands of size 1. 3350 * Existing flags are preserved. 3351 */ 3352static void 3353fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg) 3354{ 3355 cmd->opcode = opcode; 3356 cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1; 3357 cmd->arg1 = arg; 3358} 3359 3360/* 3361 * Fetch and add the MAC address and type, with masks. This generates one or 3362 * two microinstructions, and returns the pointer to the last one. 3363 */ 3364static ipfw_insn * 3365add_mac(ipfw_insn *cmd, char *av[], int cblen) 3366{ 3367 ipfw_insn_mac *mac; 3368 3369 if ( ( av[0] == NULL ) || ( av[1] == NULL ) ) 3370 errx(EX_DATAERR, "MAC dst src"); 3371 3372 cmd->opcode = O_MACADDR2; 3373 cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac); 3374 CHECK_CMDLEN; 3375 3376 mac = (ipfw_insn_mac *)cmd; 3377 get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */ 3378 get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]), 3379 &(mac->mask[ETHER_ADDR_LEN])); /* src */ 3380 return cmd; 3381} 3382 3383static ipfw_insn * 3384add_mactype(ipfw_insn *cmd, char *av, int cblen) 3385{ 3386 if (!av) 3387 errx(EX_DATAERR, "missing MAC type"); 3388 if (strcmp(av, "any") != 0) { /* we have a non-null type */ 3389 fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE, 3390 cblen); 3391 cmd->opcode = O_MAC_TYPE; 3392 return cmd; 3393 } else 3394 return NULL; 3395} 3396 3397static ipfw_insn * 3398add_proto0(ipfw_insn *cmd, char *av, u_char *protop) 3399{ 3400 struct protoent *pe; 3401 char *ep; 3402 int proto; 3403 3404 proto = strtol(av, &ep, 10); 3405 if (*ep != '\0' || proto <= 0) { 3406 if ((pe = getprotobyname(av)) == NULL) 3407 return NULL; 3408 proto = pe->p_proto; 3409 } 3410 3411 fill_cmd(cmd, O_PROTO, 0, proto); 3412 *protop = proto; 3413 return cmd; 3414} 3415 3416static ipfw_insn * 3417add_proto(ipfw_insn *cmd, char *av, u_char *protop) 3418{ 3419 u_char proto = IPPROTO_IP; 3420 3421 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3422 ; /* do not set O_IP4 nor O_IP6 */ 3423 else if (strcmp(av, "ip4") == 0) 3424 /* explicit "just IPv4" rule */ 3425 fill_cmd(cmd, O_IP4, 0, 0); 3426 else if (strcmp(av, "ip6") == 0) { 3427 /* explicit "just IPv6" rule */ 3428 proto = IPPROTO_IPV6; 3429 fill_cmd(cmd, O_IP6, 0, 0); 3430 } else 3431 return add_proto0(cmd, av, protop); 3432 3433 *protop = proto; 3434 return cmd; 3435} 3436 3437static ipfw_insn * 3438add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop) 3439{ 3440 u_char proto = IPPROTO_IP; 3441 3442 if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0) 3443 ; /* do not set O_IP4 nor O_IP6 */ 3444 else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0) 3445 /* explicit "just IPv4" rule */ 3446 fill_cmd(cmd, O_IP4, 0, 0); 3447 else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) { 3448 /* explicit "just IPv6" rule */ 3449 proto = IPPROTO_IPV6; 3450 fill_cmd(cmd, O_IP6, 0, 0); 3451 } else 3452 return add_proto0(cmd, av, protop); 3453 3454 *protop = proto; 3455 return cmd; 3456} 3457 3458static ipfw_insn * 3459add_srcip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3460{ 3461 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3462 if (cmd->opcode == O_IP_DST_SET) /* set */ 3463 cmd->opcode = O_IP_SRC_SET; 3464 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3465 cmd->opcode = O_IP_SRC_LOOKUP; 3466 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3467 cmd->opcode = O_IP_SRC_ME; 3468 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3469 cmd->opcode = O_IP_SRC; 3470 else /* addr/mask */ 3471 cmd->opcode = O_IP_SRC_MASK; 3472 return cmd; 3473} 3474 3475static ipfw_insn * 3476add_dstip(ipfw_insn *cmd, char *av, int cblen, struct tidx *tstate) 3477{ 3478 fill_ip((ipfw_insn_ip *)cmd, av, cblen, tstate); 3479 if (cmd->opcode == O_IP_DST_SET) /* set */ 3480 ; 3481 else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */ 3482 ; 3483 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */ 3484 cmd->opcode = O_IP_DST_ME; 3485 else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */ 3486 cmd->opcode = O_IP_DST; 3487 else /* addr/mask */ 3488 cmd->opcode = O_IP_DST_MASK; 3489 return cmd; 3490} 3491 3492static struct _s_x f_reserved_keywords[] = { 3493 { "altq", TOK_OR }, 3494 { "//", TOK_OR }, 3495 { "diverted", TOK_OR }, 3496 { "dst-port", TOK_OR }, 3497 { "src-port", TOK_OR }, 3498 { "established", TOK_OR }, 3499 { "keep-state", TOK_OR }, 3500 { "frag", TOK_OR }, 3501 { "icmptypes", TOK_OR }, 3502 { "in", TOK_OR }, 3503 { "out", TOK_OR }, 3504 { "ip6", TOK_OR }, 3505 { "any", TOK_OR }, 3506 { "to", TOK_OR }, 3507 { "via", TOK_OR }, 3508 { "{", TOK_OR }, 3509 { NULL, 0 } /* terminator */ 3510}; 3511 3512static ipfw_insn * 3513add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode, int cblen) 3514{ 3515 3516 if (match_token(f_reserved_keywords, av) != -1) 3517 return (NULL); 3518 3519 if (fill_newports((ipfw_insn_u16 *)cmd, av, proto, cblen)) { 3520 /* XXX todo: check that we have a protocol with ports */ 3521 cmd->opcode = opcode; 3522 return cmd; 3523 } 3524 return NULL; 3525} 3526 3527static ipfw_insn * 3528add_src(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3529{ 3530 struct in6_addr a; 3531 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3532 ipfw_insn *ret = NULL; 3533 int len; 3534 3535 /* Copy first address in set if needed */ 3536 if ((ch = strpbrk(av, "/,")) != NULL) { 3537 len = ch - av; 3538 strlcpy(buf, av, sizeof(buf)); 3539 if (len < sizeof(buf)) 3540 buf[len] = '\0'; 3541 host = buf; 3542 } else 3543 host = av; 3544 3545 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3546 inet_pton(AF_INET6, host, &a) == 1) 3547 ret = add_srcip6(cmd, av, cblen, tstate); 3548 /* XXX: should check for IPv4, not !IPv6 */ 3549 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3550 inet_pton(AF_INET6, host, &a) != 1)) 3551 ret = add_srcip(cmd, av, cblen, tstate); 3552 if (ret == NULL && strcmp(av, "any") != 0) 3553 ret = cmd; 3554 3555 return ret; 3556} 3557 3558static ipfw_insn * 3559add_dst(ipfw_insn *cmd, char *av, u_char proto, int cblen, struct tidx *tstate) 3560{ 3561 struct in6_addr a; 3562 char *host, *ch, buf[INET6_ADDRSTRLEN]; 3563 ipfw_insn *ret = NULL; 3564 int len; 3565 3566 /* Copy first address in set if needed */ 3567 if ((ch = strpbrk(av, "/,")) != NULL) { 3568 len = ch - av; 3569 strlcpy(buf, av, sizeof(buf)); 3570 if (len < sizeof(buf)) 3571 buf[len] = '\0'; 3572 host = buf; 3573 } else 3574 host = av; 3575 3576 if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 || 3577 inet_pton(AF_INET6, host, &a) == 1) 3578 ret = add_dstip6(cmd, av, cblen, tstate); 3579 /* XXX: should check for IPv4, not !IPv6 */ 3580 if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 || 3581 inet_pton(AF_INET6, host, &a) != 1)) 3582 ret = add_dstip(cmd, av, cblen, tstate); 3583 if (ret == NULL && strcmp(av, "any") != 0) 3584 ret = cmd; 3585 3586 return ret; 3587} 3588 3589/* 3590 * Parse arguments and assemble the microinstructions which make up a rule. 3591 * Rules are added into the 'rulebuf' and then copied in the correct order 3592 * into the actual rule. 3593 * 3594 * The syntax for a rule starts with the action, followed by 3595 * optional action parameters, and the various match patterns. 3596 * In the assembled microcode, the first opcode must be an O_PROBE_STATE 3597 * (generated if the rule includes a keep-state option), then the 3598 * various match patterns, log/altq actions, and the actual action. 3599 * 3600 */ 3601void 3602compile_rule(char *av[], uint32_t *rbuf, int *rbufsize, struct tidx *tstate) 3603{ 3604 /* 3605 * rules are added into the 'rulebuf' and then copied in 3606 * the correct order into the actual rule. 3607 * Some things that need to go out of order (prob, action etc.) 3608 * go into actbuf[]. 3609 */ 3610 static uint32_t actbuf[255], cmdbuf[255]; 3611 int rblen, ablen, cblen; 3612 3613 ipfw_insn *src, *dst, *cmd, *action, *prev=NULL; 3614 ipfw_insn *first_cmd; /* first match pattern */ 3615 3616 struct ip_fw_rule *rule; 3617 3618 /* 3619 * various flags used to record that we entered some fields. 3620 */ 3621 ipfw_insn *have_state = NULL; /* check-state or keep-state */ 3622 ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL; 3623 size_t len; 3624 3625 int i; 3626 3627 int open_par = 0; /* open parenthesis ( */ 3628 3629 /* proto is here because it is used to fetch ports */ 3630 u_char proto = IPPROTO_IP; /* default protocol */ 3631 3632 double match_prob = 1; /* match probability, default is always match */ 3633 3634 bzero(actbuf, sizeof(actbuf)); /* actions go here */ 3635 bzero(cmdbuf, sizeof(cmdbuf)); 3636 bzero(rbuf, *rbufsize); 3637 3638 rule = (struct ip_fw_rule *)rbuf; 3639 cmd = (ipfw_insn *)cmdbuf; 3640 action = (ipfw_insn *)actbuf; 3641 3642 rblen = *rbufsize / sizeof(uint32_t); 3643 rblen -= sizeof(struct ip_fw_rule) / sizeof(uint32_t); 3644 ablen = sizeof(actbuf) / sizeof(actbuf[0]); 3645 cblen = sizeof(cmdbuf) / sizeof(cmdbuf[0]); 3646 cblen -= F_INSN_SIZE(ipfw_insn_u32) + 1; 3647 3648#define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; } 3649#define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len) 3650 3651 av++; 3652 3653 /* [rule N] -- Rule number optional */ 3654 if (av[0] && isdigit(**av)) { 3655 rule->rulenum = atoi(*av); 3656 av++; 3657 } 3658 3659 /* [set N] -- set number (0..RESVD_SET), optional */ 3660 if (av[0] && av[1] && _substrcmp(*av, "set") == 0) { 3661 int set = strtoul(av[1], NULL, 10); 3662 if (set < 0 || set > RESVD_SET) 3663 errx(EX_DATAERR, "illegal set %s", av[1]); 3664 rule->set = set; 3665 tstate->set = set; 3666 av += 2; 3667 } 3668 3669 /* [prob D] -- match probability, optional */ 3670 if (av[0] && av[1] && _substrcmp(*av, "prob") == 0) { 3671 match_prob = strtod(av[1], NULL); 3672 3673 if (match_prob <= 0 || match_prob > 1) 3674 errx(EX_DATAERR, "illegal match prob. %s", av[1]); 3675 av += 2; 3676 } 3677 3678 /* action -- mandatory */ 3679 NEED1("missing action"); 3680 i = match_token(rule_actions, *av); 3681 av++; 3682 action->len = 1; /* default */ 3683 CHECK_ACTLEN; 3684 switch(i) { 3685 case TOK_CHECKSTATE: 3686 have_state = action; 3687 action->opcode = O_CHECK_STATE; 3688 break; 3689 3690 case TOK_ACCEPT: 3691 action->opcode = O_ACCEPT; 3692 break; 3693 3694 case TOK_DENY: 3695 action->opcode = O_DENY; 3696 action->arg1 = 0; 3697 break; 3698 3699 case TOK_REJECT: 3700 action->opcode = O_REJECT; 3701 action->arg1 = ICMP_UNREACH_HOST; 3702 break; 3703 3704 case TOK_RESET: 3705 action->opcode = O_REJECT; 3706 action->arg1 = ICMP_REJECT_RST; 3707 break; 3708 3709 case TOK_RESET6: 3710 action->opcode = O_UNREACH6; 3711 action->arg1 = ICMP6_UNREACH_RST; 3712 break; 3713 3714 case TOK_UNREACH: 3715 action->opcode = O_REJECT; 3716 NEED1("missing reject code"); 3717 fill_reject_code(&action->arg1, *av); 3718 av++; 3719 break; 3720 3721 case TOK_UNREACH6: 3722 action->opcode = O_UNREACH6; 3723 NEED1("missing unreach code"); 3724 fill_unreach6_code(&action->arg1, *av); 3725 av++; 3726 break; 3727 3728 case TOK_COUNT: 3729 action->opcode = O_COUNT; 3730 break; 3731 3732 case TOK_NAT: 3733 action->opcode = O_NAT; 3734 action->len = F_INSN_SIZE(ipfw_insn_nat); 3735 CHECK_ACTLEN; 3736 if (*av != NULL && _substrcmp(*av, "global") == 0) { 3737 action->arg1 = IP_FW_NAT44_GLOBAL; 3738 av++; 3739 break; 3740 } else 3741 goto chkarg; 3742 case TOK_QUEUE: 3743 action->opcode = O_QUEUE; 3744 goto chkarg; 3745 case TOK_PIPE: 3746 action->opcode = O_PIPE; 3747 goto chkarg; 3748 case TOK_SKIPTO: 3749 action->opcode = O_SKIPTO; 3750 goto chkarg; 3751 case TOK_NETGRAPH: 3752 action->opcode = O_NETGRAPH; 3753 goto chkarg; 3754 case TOK_NGTEE: 3755 action->opcode = O_NGTEE; 3756 goto chkarg; 3757 case TOK_DIVERT: 3758 action->opcode = O_DIVERT; 3759 goto chkarg; 3760 case TOK_TEE: 3761 action->opcode = O_TEE; 3762 goto chkarg; 3763 case TOK_CALL: 3764 action->opcode = O_CALLRETURN; 3765chkarg: 3766 if (!av[0]) 3767 errx(EX_USAGE, "missing argument for %s", *(av - 1)); 3768 if (isdigit(**av)) { 3769 action->arg1 = strtoul(*av, NULL, 10); 3770 if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG) 3771 errx(EX_DATAERR, "illegal argument for %s", 3772 *(av - 1)); 3773 } else if (_substrcmp(*av, "tablearg") == 0) { 3774 action->arg1 = IP_FW_TARG; 3775 } else if (i == TOK_DIVERT || i == TOK_TEE) { 3776 struct servent *s; 3777 setservent(1); 3778 s = getservbyname(av[0], "divert"); 3779 if (s != NULL) 3780 action->arg1 = ntohs(s->s_port); 3781 else 3782 errx(EX_DATAERR, "illegal divert/tee port"); 3783 } else 3784 errx(EX_DATAERR, "illegal argument for %s", *(av - 1)); 3785 av++; 3786 break; 3787 3788 case TOK_FORWARD: { 3789 /* 3790 * Locate the address-port separator (':' or ','). 3791 * Could be one of the following: 3792 * hostname:port 3793 * IPv4 a.b.c.d,port 3794 * IPv4 a.b.c.d:port 3795 * IPv6 w:x:y::z,port 3796 * The ':' can only be used with hostname and IPv4 address. 3797 * XXX-BZ Should we also support [w:x:y::z]:port? 3798 */ 3799 struct sockaddr_storage result; 3800 struct addrinfo *res; 3801 char *s, *end; 3802 int family; 3803 u_short port_number; 3804 3805 NEED1("missing forward address[:port]"); 3806 3807 /* 3808 * locate the address-port separator (':' or ',') 3809 */ 3810 s = strchr(*av, ','); 3811 if (s == NULL) { 3812 /* Distinguish between IPv4:port and IPv6 cases. */ 3813 s = strchr(*av, ':'); 3814 if (s && strchr(s+1, ':')) 3815 s = NULL; /* no port */ 3816 } 3817 3818 port_number = 0; 3819 if (s != NULL) { 3820 /* Terminate host portion and set s to start of port. */ 3821 *(s++) = '\0'; 3822 i = strtoport(s, &end, 0 /* base */, 0 /* proto */); 3823 if (s == end) 3824 errx(EX_DATAERR, 3825 "illegal forwarding port ``%s''", s); 3826 port_number = (u_short)i; 3827 } 3828 3829 if (_substrcmp(*av, "tablearg") == 0) { 3830 family = PF_INET; 3831 ((struct sockaddr_in*)&result)->sin_addr.s_addr = 3832 INADDR_ANY; 3833 } else { 3834 /* 3835 * Resolve the host name or address to a family and a 3836 * network representation of the address. 3837 */ 3838 if (getaddrinfo(*av, NULL, NULL, &res)) 3839 errx(EX_DATAERR, NULL); 3840 /* Just use the first host in the answer. */ 3841 family = res->ai_family; 3842 memcpy(&result, res->ai_addr, res->ai_addrlen); 3843 freeaddrinfo(res); 3844 } 3845 3846 if (family == PF_INET) { 3847 ipfw_insn_sa *p = (ipfw_insn_sa *)action; 3848 3849 action->opcode = O_FORWARD_IP; 3850 action->len = F_INSN_SIZE(ipfw_insn_sa); 3851 CHECK_ACTLEN; 3852 3853 /* 3854 * In the kernel we assume AF_INET and use only 3855 * sin_port and sin_addr. Remember to set sin_len as 3856 * the routing code seems to use it too. 3857 */ 3858 p->sa.sin_len = sizeof(struct sockaddr_in); 3859 p->sa.sin_family = AF_INET; 3860 p->sa.sin_port = port_number; 3861 p->sa.sin_addr.s_addr = 3862 ((struct sockaddr_in *)&result)->sin_addr.s_addr; 3863 } else if (family == PF_INET6) { 3864 ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action; 3865 3866 action->opcode = O_FORWARD_IP6; 3867 action->len = F_INSN_SIZE(ipfw_insn_sa6); 3868 CHECK_ACTLEN; 3869 3870 p->sa.sin6_len = sizeof(struct sockaddr_in6); 3871 p->sa.sin6_family = AF_INET6; 3872 p->sa.sin6_port = port_number; 3873 p->sa.sin6_flowinfo = 0; 3874 p->sa.sin6_scope_id = 3875 ((struct sockaddr_in6 *)&result)->sin6_scope_id; 3876 bcopy(&((struct sockaddr_in6*)&result)->sin6_addr, 3877 &p->sa.sin6_addr, sizeof(p->sa.sin6_addr)); 3878 } else { 3879 errx(EX_DATAERR, "Invalid address family in forward action"); 3880 } 3881 av++; 3882 break; 3883 } 3884 case TOK_COMMENT: 3885 /* pretend it is a 'count' rule followed by the comment */ 3886 action->opcode = O_COUNT; 3887 av--; /* go back... */ 3888 break; 3889 3890 case TOK_SETFIB: 3891 { 3892 int numfibs; 3893 size_t intsize = sizeof(int); 3894 3895 action->opcode = O_SETFIB; 3896 NEED1("missing fib number"); 3897 if (_substrcmp(*av, "tablearg") == 0) { 3898 action->arg1 = IP_FW_TARG; 3899 } else { 3900 action->arg1 = strtoul(*av, NULL, 10); 3901 if (sysctlbyname("net.fibs", &numfibs, &intsize, 3902 NULL, 0) == -1) 3903 errx(EX_DATAERR, "fibs not suported.\n"); 3904 if (action->arg1 >= numfibs) /* Temporary */ 3905 errx(EX_DATAERR, "fib too large.\n"); 3906 /* Add high-order bit to fib to make room for tablearg*/ 3907 action->arg1 |= 0x8000; 3908 } 3909 av++; 3910 break; 3911 } 3912 3913 case TOK_SETDSCP: 3914 { 3915 int code; 3916 3917 action->opcode = O_SETDSCP; 3918 NEED1("missing DSCP code"); 3919 if (_substrcmp(*av, "tablearg") == 0) { 3920 action->arg1 = IP_FW_TARG; 3921 } else { 3922 if (isalpha(*av[0])) { 3923 if ((code = match_token(f_ipdscp, *av)) == -1) 3924 errx(EX_DATAERR, "Unknown DSCP code"); 3925 action->arg1 = code; 3926 } else 3927 action->arg1 = strtoul(*av, NULL, 10); 3928 /* 3929 * Add high-order bit to DSCP to make room 3930 * for tablearg 3931 */ 3932 action->arg1 |= 0x8000; 3933 } 3934 av++; 3935 break; 3936 } 3937 3938 case TOK_REASS: 3939 action->opcode = O_REASS; 3940 break; 3941 3942 case TOK_RETURN: 3943 fill_cmd(action, O_CALLRETURN, F_NOT, 0); 3944 break; 3945 3946 default: 3947 av--; 3948 if (match_token(rule_eactions, *av) == -1) 3949 errx(EX_DATAERR, "invalid action %s\n", *av); 3950 /* 3951 * External actions support. 3952 * XXX: we support only syntax with instance name. 3953 * For known external actions (from rule_eactions list) 3954 * we can handle syntax directly. But with `eaction' 3955 * keyword we can use only `eaction <name> <instance>' 3956 * syntax. 3957 */ 3958 case TOK_EACTION: { 3959 uint16_t idx; 3960 3961 NEED1("Missing eaction name"); 3962 if (eaction_check_name(*av) != 0) 3963 errx(EX_DATAERR, "Invalid eaction name %s", *av); 3964 idx = pack_object(tstate, *av, IPFW_TLV_EACTION); 3965 if (idx == 0) 3966 errx(EX_DATAERR, "pack_object failed"); 3967 fill_cmd(action, O_EXTERNAL_ACTION, 0, idx); 3968 av++; 3969 NEED1("Missing eaction instance name"); 3970 action = next_cmd(action, &ablen); 3971 action->len = 1; 3972 CHECK_ACTLEN; 3973 if (eaction_check_name(*av) != 0) 3974 errx(EX_DATAERR, "Invalid eaction instance name %s", 3975 *av); 3976 /* 3977 * External action instance object has TLV type depended 3978 * from the external action name object index. Since we 3979 * currently don't know this index, use zero as TLV type. 3980 */ 3981 idx = pack_object(tstate, *av, 0); 3982 if (idx == 0) 3983 errx(EX_DATAERR, "pack_object failed"); 3984 fill_cmd(action, O_EXTERNAL_INSTANCE, 0, idx); 3985 av++; 3986 } 3987 } 3988 action = next_cmd(action, &ablen); 3989 3990 /* 3991 * [altq queuename] -- altq tag, optional 3992 * [log [logamount N]] -- log, optional 3993 * 3994 * If they exist, it go first in the cmdbuf, but then it is 3995 * skipped in the copy section to the end of the buffer. 3996 */ 3997 while (av[0] != NULL && (i = match_token(rule_action_params, *av)) != -1) { 3998 av++; 3999 switch (i) { 4000 case TOK_LOG: 4001 { 4002 ipfw_insn_log *c = (ipfw_insn_log *)cmd; 4003 int l; 4004 4005 if (have_log) 4006 errx(EX_DATAERR, 4007 "log cannot be specified more than once"); 4008 have_log = (ipfw_insn *)c; 4009 cmd->len = F_INSN_SIZE(ipfw_insn_log); 4010 CHECK_CMDLEN; 4011 cmd->opcode = O_LOG; 4012 if (av[0] && _substrcmp(*av, "logamount") == 0) { 4013 av++; 4014 NEED1("logamount requires argument"); 4015 l = atoi(*av); 4016 if (l < 0) 4017 errx(EX_DATAERR, 4018 "logamount must be positive"); 4019 c->max_log = l; 4020 av++; 4021 } else { 4022 len = sizeof(c->max_log); 4023 if (sysctlbyname("net.inet.ip.fw.verbose_limit", 4024 &c->max_log, &len, NULL, 0) == -1) { 4025 if (co.test_only) { 4026 c->max_log = 0; 4027 break; 4028 } 4029 errx(1, "sysctlbyname(\"%s\")", 4030 "net.inet.ip.fw.verbose_limit"); 4031 } 4032 } 4033 } 4034 break; 4035 4036#ifndef NO_ALTQ 4037 case TOK_ALTQ: 4038 { 4039 ipfw_insn_altq *a = (ipfw_insn_altq *)cmd; 4040 4041 NEED1("missing altq queue name"); 4042 if (have_altq) 4043 errx(EX_DATAERR, 4044 "altq cannot be specified more than once"); 4045 have_altq = (ipfw_insn *)a; 4046 cmd->len = F_INSN_SIZE(ipfw_insn_altq); 4047 CHECK_CMDLEN; 4048 cmd->opcode = O_ALTQ; 4049 a->qid = altq_name_to_qid(*av); 4050 av++; 4051 } 4052 break; 4053#endif 4054 4055 case TOK_TAG: 4056 case TOK_UNTAG: { 4057 uint16_t tag; 4058 4059 if (have_tag) 4060 errx(EX_USAGE, "tag and untag cannot be " 4061 "specified more than once"); 4062 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, i, 4063 rule_action_params); 4064 have_tag = cmd; 4065 fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag); 4066 av++; 4067 break; 4068 } 4069 4070 default: 4071 abort(); 4072 } 4073 cmd = next_cmd(cmd, &cblen); 4074 } 4075 4076 if (have_state) /* must be a check-state, we are done */ 4077 goto done; 4078 4079#define OR_START(target) \ 4080 if (av[0] && (*av[0] == '(' || *av[0] == '{')) { \ 4081 if (open_par) \ 4082 errx(EX_USAGE, "nested \"(\" not allowed\n"); \ 4083 prev = NULL; \ 4084 open_par = 1; \ 4085 if ( (av[0])[1] == '\0') { \ 4086 av++; \ 4087 } else \ 4088 (*av)++; \ 4089 } \ 4090 target: \ 4091 4092 4093#define CLOSE_PAR \ 4094 if (open_par) { \ 4095 if (av[0] && ( \ 4096 strcmp(*av, ")") == 0 || \ 4097 strcmp(*av, "}") == 0)) { \ 4098 prev = NULL; \ 4099 open_par = 0; \ 4100 av++; \ 4101 } else \ 4102 errx(EX_USAGE, "missing \")\"\n"); \ 4103 } 4104 4105#define NOT_BLOCK \ 4106 if (av[0] && _substrcmp(*av, "not") == 0) { \ 4107 if (cmd->len & F_NOT) \ 4108 errx(EX_USAGE, "double \"not\" not allowed\n"); \ 4109 cmd->len |= F_NOT; \ 4110 av++; \ 4111 } 4112 4113#define OR_BLOCK(target) \ 4114 if (av[0] && _substrcmp(*av, "or") == 0) { \ 4115 if (prev == NULL || open_par == 0) \ 4116 errx(EX_DATAERR, "invalid OR block"); \ 4117 prev->len |= F_OR; \ 4118 av++; \ 4119 goto target; \ 4120 } \ 4121 CLOSE_PAR; 4122 4123 first_cmd = cmd; 4124 4125#if 0 4126 /* 4127 * MAC addresses, optional. 4128 * If we have this, we skip the part "proto from src to dst" 4129 * and jump straight to the option parsing. 4130 */ 4131 NOT_BLOCK; 4132 NEED1("missing protocol"); 4133 if (_substrcmp(*av, "MAC") == 0 || 4134 _substrcmp(*av, "mac") == 0) { 4135 av++; /* the "MAC" keyword */ 4136 add_mac(cmd, av); /* exits in case of errors */ 4137 cmd = next_cmd(cmd); 4138 av += 2; /* dst-mac and src-mac */ 4139 NOT_BLOCK; 4140 NEED1("missing mac type"); 4141 if (add_mactype(cmd, av[0])) 4142 cmd = next_cmd(cmd); 4143 av++; /* any or mac-type */ 4144 goto read_options; 4145 } 4146#endif 4147 4148 /* 4149 * protocol, mandatory 4150 */ 4151 OR_START(get_proto); 4152 NOT_BLOCK; 4153 NEED1("missing protocol"); 4154 if (add_proto_compat(cmd, *av, &proto)) { 4155 av++; 4156 if (F_LEN(cmd) != 0) { 4157 prev = cmd; 4158 cmd = next_cmd(cmd, &cblen); 4159 } 4160 } else if (first_cmd != cmd) { 4161 errx(EX_DATAERR, "invalid protocol ``%s''", *av); 4162 } else 4163 goto read_options; 4164 OR_BLOCK(get_proto); 4165 4166 /* 4167 * "from", mandatory 4168 */ 4169 if ((av[0] == NULL) || _substrcmp(*av, "from") != 0) 4170 errx(EX_USAGE, "missing ``from''"); 4171 av++; 4172 4173 /* 4174 * source IP, mandatory 4175 */ 4176 OR_START(source_ip); 4177 NOT_BLOCK; /* optional "not" */ 4178 NEED1("missing source address"); 4179 if (add_src(cmd, *av, proto, cblen, tstate)) { 4180 av++; 4181 if (F_LEN(cmd) != 0) { /* ! any */ 4182 prev = cmd; 4183 cmd = next_cmd(cmd, &cblen); 4184 } 4185 } else 4186 errx(EX_USAGE, "bad source address %s", *av); 4187 OR_BLOCK(source_ip); 4188 4189 /* 4190 * source ports, optional 4191 */ 4192 NOT_BLOCK; /* optional "not" */ 4193 if ( av[0] != NULL ) { 4194 if (_substrcmp(*av, "any") == 0 || 4195 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4196 av++; 4197 if (F_LEN(cmd) != 0) 4198 cmd = next_cmd(cmd, &cblen); 4199 } 4200 } 4201 4202 /* 4203 * "to", mandatory 4204 */ 4205 if ( (av[0] == NULL) || _substrcmp(*av, "to") != 0 ) 4206 errx(EX_USAGE, "missing ``to''"); 4207 av++; 4208 4209 /* 4210 * destination, mandatory 4211 */ 4212 OR_START(dest_ip); 4213 NOT_BLOCK; /* optional "not" */ 4214 NEED1("missing dst address"); 4215 if (add_dst(cmd, *av, proto, cblen, tstate)) { 4216 av++; 4217 if (F_LEN(cmd) != 0) { /* ! any */ 4218 prev = cmd; 4219 cmd = next_cmd(cmd, &cblen); 4220 } 4221 } else 4222 errx( EX_USAGE, "bad destination address %s", *av); 4223 OR_BLOCK(dest_ip); 4224 4225 /* 4226 * dest. ports, optional 4227 */ 4228 NOT_BLOCK; /* optional "not" */ 4229 if (av[0]) { 4230 if (_substrcmp(*av, "any") == 0 || 4231 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4232 av++; 4233 if (F_LEN(cmd) != 0) 4234 cmd = next_cmd(cmd, &cblen); 4235 } 4236 } 4237 4238read_options: 4239 if (av[0] && first_cmd == cmd) { 4240 /* 4241 * nothing specified so far, store in the rule to ease 4242 * printout later. 4243 */ 4244 rule->flags |= IPFW_RULE_NOOPT; 4245 } 4246 prev = NULL; 4247 while ( av[0] != NULL ) { 4248 char *s; 4249 ipfw_insn_u32 *cmd32; /* alias for cmd */ 4250 4251 s = *av; 4252 cmd32 = (ipfw_insn_u32 *)cmd; 4253 4254 if (*s == '!') { /* alternate syntax for NOT */ 4255 if (cmd->len & F_NOT) 4256 errx(EX_USAGE, "double \"not\" not allowed\n"); 4257 cmd->len = F_NOT; 4258 s++; 4259 } 4260 i = match_token(rule_options, s); 4261 av++; 4262 switch(i) { 4263 case TOK_NOT: 4264 if (cmd->len & F_NOT) 4265 errx(EX_USAGE, "double \"not\" not allowed\n"); 4266 cmd->len = F_NOT; 4267 break; 4268 4269 case TOK_OR: 4270 if (open_par == 0 || prev == NULL) 4271 errx(EX_USAGE, "invalid \"or\" block\n"); 4272 prev->len |= F_OR; 4273 break; 4274 4275 case TOK_STARTBRACE: 4276 if (open_par) 4277 errx(EX_USAGE, "+nested \"(\" not allowed\n"); 4278 open_par = 1; 4279 break; 4280 4281 case TOK_ENDBRACE: 4282 if (!open_par) 4283 errx(EX_USAGE, "+missing \")\"\n"); 4284 open_par = 0; 4285 prev = NULL; 4286 break; 4287 4288 case TOK_IN: 4289 fill_cmd(cmd, O_IN, 0, 0); 4290 break; 4291 4292 case TOK_OUT: 4293 cmd->len ^= F_NOT; /* toggle F_NOT */ 4294 fill_cmd(cmd, O_IN, 0, 0); 4295 break; 4296 4297 case TOK_DIVERTED: 4298 fill_cmd(cmd, O_DIVERTED, 0, 3); 4299 break; 4300 4301 case TOK_DIVERTEDLOOPBACK: 4302 fill_cmd(cmd, O_DIVERTED, 0, 1); 4303 break; 4304 4305 case TOK_DIVERTEDOUTPUT: 4306 fill_cmd(cmd, O_DIVERTED, 0, 2); 4307 break; 4308 4309 case TOK_FRAG: 4310 fill_cmd(cmd, O_FRAG, 0, 0); 4311 break; 4312 4313 case TOK_LAYER2: 4314 fill_cmd(cmd, O_LAYER2, 0, 0); 4315 break; 4316 4317 case TOK_XMIT: 4318 case TOK_RECV: 4319 case TOK_VIA: 4320 NEED1("recv, xmit, via require interface name" 4321 " or address"); 4322 fill_iface((ipfw_insn_if *)cmd, av[0], cblen, tstate); 4323 av++; 4324 if (F_LEN(cmd) == 0) /* not a valid address */ 4325 break; 4326 if (i == TOK_XMIT) 4327 cmd->opcode = O_XMIT; 4328 else if (i == TOK_RECV) 4329 cmd->opcode = O_RECV; 4330 else if (i == TOK_VIA) 4331 cmd->opcode = O_VIA; 4332 break; 4333 4334 case TOK_ICMPTYPES: 4335 NEED1("icmptypes requires list of types"); 4336 fill_icmptypes((ipfw_insn_u32 *)cmd, *av); 4337 av++; 4338 break; 4339 4340 case TOK_ICMP6TYPES: 4341 NEED1("icmptypes requires list of types"); 4342 fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av, cblen); 4343 av++; 4344 break; 4345 4346 case TOK_IPTTL: 4347 NEED1("ipttl requires TTL"); 4348 if (strpbrk(*av, "-,")) { 4349 if (!add_ports(cmd, *av, 0, O_IPTTL, cblen)) 4350 errx(EX_DATAERR, "invalid ipttl %s", *av); 4351 } else 4352 fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0)); 4353 av++; 4354 break; 4355 4356 case TOK_IPID: 4357 NEED1("ipid requires id"); 4358 if (strpbrk(*av, "-,")) { 4359 if (!add_ports(cmd, *av, 0, O_IPID, cblen)) 4360 errx(EX_DATAERR, "invalid ipid %s", *av); 4361 } else 4362 fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0)); 4363 av++; 4364 break; 4365 4366 case TOK_IPLEN: 4367 NEED1("iplen requires length"); 4368 if (strpbrk(*av, "-,")) { 4369 if (!add_ports(cmd, *av, 0, O_IPLEN, cblen)) 4370 errx(EX_DATAERR, "invalid ip len %s", *av); 4371 } else 4372 fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0)); 4373 av++; 4374 break; 4375 4376 case TOK_IPVER: 4377 NEED1("ipver requires version"); 4378 fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0)); 4379 av++; 4380 break; 4381 4382 case TOK_IPPRECEDENCE: 4383 NEED1("ipprecedence requires value"); 4384 fill_cmd(cmd, O_IPPRECEDENCE, 0, 4385 (strtoul(*av, NULL, 0) & 7) << 5); 4386 av++; 4387 break; 4388 4389 case TOK_DSCP: 4390 NEED1("missing DSCP code"); 4391 fill_dscp(cmd, *av, cblen); 4392 av++; 4393 break; 4394 4395 case TOK_IPOPTS: 4396 NEED1("missing argument for ipoptions"); 4397 fill_flags_cmd(cmd, O_IPOPT, f_ipopts, *av); 4398 av++; 4399 break; 4400 4401 case TOK_IPTOS: 4402 NEED1("missing argument for iptos"); 4403 fill_flags_cmd(cmd, O_IPTOS, f_iptos, *av); 4404 av++; 4405 break; 4406 4407 case TOK_UID: 4408 NEED1("uid requires argument"); 4409 { 4410 char *end; 4411 uid_t uid; 4412 struct passwd *pwd; 4413 4414 cmd->opcode = O_UID; 4415 uid = strtoul(*av, &end, 0); 4416 pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av); 4417 if (pwd == NULL) 4418 errx(EX_DATAERR, "uid \"%s\" nonexistent", *av); 4419 cmd32->d[0] = pwd->pw_uid; 4420 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4421 av++; 4422 } 4423 break; 4424 4425 case TOK_GID: 4426 NEED1("gid requires argument"); 4427 { 4428 char *end; 4429 gid_t gid; 4430 struct group *grp; 4431 4432 cmd->opcode = O_GID; 4433 gid = strtoul(*av, &end, 0); 4434 grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av); 4435 if (grp == NULL) 4436 errx(EX_DATAERR, "gid \"%s\" nonexistent", *av); 4437 cmd32->d[0] = grp->gr_gid; 4438 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4439 av++; 4440 } 4441 break; 4442 4443 case TOK_JAIL: 4444 NEED1("jail requires argument"); 4445 { 4446 char *end; 4447 int jid; 4448 4449 cmd->opcode = O_JAIL; 4450 jid = (int)strtol(*av, &end, 0); 4451 if (jid < 0 || *end != '\0') 4452 errx(EX_DATAERR, "jail requires prison ID"); 4453 cmd32->d[0] = (uint32_t)jid; 4454 cmd->len |= F_INSN_SIZE(ipfw_insn_u32); 4455 av++; 4456 } 4457 break; 4458 4459 case TOK_ESTAB: 4460 fill_cmd(cmd, O_ESTAB, 0, 0); 4461 break; 4462 4463 case TOK_SETUP: 4464 fill_cmd(cmd, O_TCPFLAGS, 0, 4465 (TH_SYN) | ( (TH_ACK) & 0xff) <<8 ); 4466 break; 4467 4468 case TOK_TCPDATALEN: 4469 NEED1("tcpdatalen requires length"); 4470 if (strpbrk(*av, "-,")) { 4471 if (!add_ports(cmd, *av, 0, O_TCPDATALEN, cblen)) 4472 errx(EX_DATAERR, "invalid tcpdata len %s", *av); 4473 } else 4474 fill_cmd(cmd, O_TCPDATALEN, 0, 4475 strtoul(*av, NULL, 0)); 4476 av++; 4477 break; 4478 4479 case TOK_TCPOPTS: 4480 NEED1("missing argument for tcpoptions"); 4481 fill_flags_cmd(cmd, O_TCPOPTS, f_tcpopts, *av); 4482 av++; 4483 break; 4484 4485 case TOK_TCPSEQ: 4486 case TOK_TCPACK: 4487 NEED1("tcpseq/tcpack requires argument"); 4488 cmd->len = F_INSN_SIZE(ipfw_insn_u32); 4489 cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK; 4490 cmd32->d[0] = htonl(strtoul(*av, NULL, 0)); 4491 av++; 4492 break; 4493 4494 case TOK_TCPWIN: 4495 NEED1("tcpwin requires length"); 4496 if (strpbrk(*av, "-,")) { 4497 if (!add_ports(cmd, *av, 0, O_TCPWIN, cblen)) 4498 errx(EX_DATAERR, "invalid tcpwin len %s", *av); 4499 } else 4500 fill_cmd(cmd, O_TCPWIN, 0, 4501 strtoul(*av, NULL, 0)); 4502 av++; 4503 break; 4504 4505 case TOK_TCPFLAGS: 4506 NEED1("missing argument for tcpflags"); 4507 cmd->opcode = O_TCPFLAGS; 4508 fill_flags_cmd(cmd, O_TCPFLAGS, f_tcpflags, *av); 4509 av++; 4510 break; 4511 4512 case TOK_KEEPSTATE: 4513 if (open_par) 4514 errx(EX_USAGE, "keep-state cannot be part " 4515 "of an or block"); 4516 if (have_state) 4517 errx(EX_USAGE, "only one of keep-state " 4518 "and limit is allowed"); 4519 have_state = cmd; 4520 fill_cmd(cmd, O_KEEP_STATE, 0, 0); 4521 break; 4522 4523 case TOK_LIMIT: { 4524 ipfw_insn_limit *c = (ipfw_insn_limit *)cmd; 4525 int val; 4526 4527 if (open_par) 4528 errx(EX_USAGE, 4529 "limit cannot be part of an or block"); 4530 if (have_state) 4531 errx(EX_USAGE, "only one of keep-state and " 4532 "limit is allowed"); 4533 have_state = cmd; 4534 4535 cmd->len = F_INSN_SIZE(ipfw_insn_limit); 4536 CHECK_CMDLEN; 4537 cmd->opcode = O_LIMIT; 4538 c->limit_mask = c->conn_limit = 0; 4539 4540 while ( av[0] != NULL ) { 4541 if ((val = match_token(limit_masks, *av)) <= 0) 4542 break; 4543 c->limit_mask |= val; 4544 av++; 4545 } 4546 4547 if (c->limit_mask == 0) 4548 errx(EX_USAGE, "limit: missing limit mask"); 4549 4550 GET_UINT_ARG(c->conn_limit, IPFW_ARG_MIN, IPFW_ARG_MAX, 4551 TOK_LIMIT, rule_options); 4552 4553 av++; 4554 break; 4555 } 4556 4557 case TOK_PROTO: 4558 NEED1("missing protocol"); 4559 if (add_proto(cmd, *av, &proto)) { 4560 av++; 4561 } else 4562 errx(EX_DATAERR, "invalid protocol ``%s''", 4563 *av); 4564 break; 4565 4566 case TOK_SRCIP: 4567 NEED1("missing source IP"); 4568 if (add_srcip(cmd, *av, cblen, tstate)) { 4569 av++; 4570 } 4571 break; 4572 4573 case TOK_DSTIP: 4574 NEED1("missing destination IP"); 4575 if (add_dstip(cmd, *av, cblen, tstate)) { 4576 av++; 4577 } 4578 break; 4579 4580 case TOK_SRCIP6: 4581 NEED1("missing source IP6"); 4582 if (add_srcip6(cmd, *av, cblen, tstate)) { 4583 av++; 4584 } 4585 break; 4586 4587 case TOK_DSTIP6: 4588 NEED1("missing destination IP6"); 4589 if (add_dstip6(cmd, *av, cblen, tstate)) { 4590 av++; 4591 } 4592 break; 4593 4594 case TOK_SRCPORT: 4595 NEED1("missing source port"); 4596 if (_substrcmp(*av, "any") == 0 || 4597 add_ports(cmd, *av, proto, O_IP_SRCPORT, cblen)) { 4598 av++; 4599 } else 4600 errx(EX_DATAERR, "invalid source port %s", *av); 4601 break; 4602 4603 case TOK_DSTPORT: 4604 NEED1("missing destination port"); 4605 if (_substrcmp(*av, "any") == 0 || 4606 add_ports(cmd, *av, proto, O_IP_DSTPORT, cblen)) { 4607 av++; 4608 } else 4609 errx(EX_DATAERR, "invalid destination port %s", 4610 *av); 4611 break; 4612 4613 case TOK_MAC: 4614 if (add_mac(cmd, av, cblen)) 4615 av += 2; 4616 break; 4617 4618 case TOK_MACTYPE: 4619 NEED1("missing mac type"); 4620 if (!add_mactype(cmd, *av, cblen)) 4621 errx(EX_DATAERR, "invalid mac type %s", *av); 4622 av++; 4623 break; 4624 4625 case TOK_VERREVPATH: 4626 fill_cmd(cmd, O_VERREVPATH, 0, 0); 4627 break; 4628 4629 case TOK_VERSRCREACH: 4630 fill_cmd(cmd, O_VERSRCREACH, 0, 0); 4631 break; 4632 4633 case TOK_ANTISPOOF: 4634 fill_cmd(cmd, O_ANTISPOOF, 0, 0); 4635 break; 4636 4637 case TOK_IPSEC: 4638 fill_cmd(cmd, O_IPSEC, 0, 0); 4639 break; 4640 4641 case TOK_IPV6: 4642 fill_cmd(cmd, O_IP6, 0, 0); 4643 break; 4644 4645 case TOK_IPV4: 4646 fill_cmd(cmd, O_IP4, 0, 0); 4647 break; 4648 4649 case TOK_EXT6HDR: 4650 fill_ext6hdr( cmd, *av ); 4651 av++; 4652 break; 4653 4654 case TOK_FLOWID: 4655 if (proto != IPPROTO_IPV6 ) 4656 errx( EX_USAGE, "flow-id filter is active " 4657 "only for ipv6 protocol\n"); 4658 fill_flow6( (ipfw_insn_u32 *) cmd, *av, cblen); 4659 av++; 4660 break; 4661 4662 case TOK_COMMENT: 4663 fill_comment(cmd, av, cblen); 4664 av[0]=NULL; 4665 break; 4666 4667 case TOK_TAGGED: 4668 if (av[0] && strpbrk(*av, "-,")) { 4669 if (!add_ports(cmd, *av, 0, O_TAGGED, cblen)) 4670 errx(EX_DATAERR, "tagged: invalid tag" 4671 " list: %s", *av); 4672 } 4673 else { 4674 uint16_t tag; 4675 4676 GET_UINT_ARG(tag, IPFW_ARG_MIN, IPFW_ARG_MAX, 4677 TOK_TAGGED, rule_options); 4678 fill_cmd(cmd, O_TAGGED, 0, tag); 4679 } 4680 av++; 4681 break; 4682 4683 case TOK_FIB: 4684 NEED1("fib requires fib number"); 4685 fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0)); 4686 av++; 4687 break; 4688 case TOK_SOCKARG: 4689 fill_cmd(cmd, O_SOCKARG, 0, 0); 4690 break; 4691 4692 case TOK_LOOKUP: { 4693 ipfw_insn_u32 *c = (ipfw_insn_u32 *)cmd; 4694 int j; 4695 4696 if (!av[0] || !av[1]) 4697 errx(EX_USAGE, "format: lookup argument tablenum"); 4698 cmd->opcode = O_IP_DST_LOOKUP; 4699 cmd->len |= F_INSN_SIZE(ipfw_insn) + 2; 4700 i = match_token(rule_options, *av); 4701 for (j = 0; lookup_key[j] >= 0 ; j++) { 4702 if (i == lookup_key[j]) 4703 break; 4704 } 4705 if (lookup_key[j] <= 0) 4706 errx(EX_USAGE, "format: cannot lookup on %s", *av); 4707 __PAST_END(c->d, 1) = j; // i converted to option 4708 av++; 4709 4710 if ((j = pack_table(tstate, *av)) == 0) 4711 errx(EX_DATAERR, "Invalid table name: %s", *av); 4712 4713 cmd->arg1 = j; 4714 av++; 4715 } 4716 break; 4717 case TOK_FLOW: 4718 NEED1("missing table name"); 4719 if (strncmp(*av, "table(", 6) != 0) 4720 errx(EX_DATAERR, 4721 "enclose table name into \"table()\""); 4722 fill_table(cmd, *av, O_IP_FLOW_LOOKUP, tstate); 4723 av++; 4724 break; 4725 4726 default: 4727 errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s); 4728 } 4729 if (F_LEN(cmd) > 0) { /* prepare to advance */ 4730 prev = cmd; 4731 cmd = next_cmd(cmd, &cblen); 4732 } 4733 } 4734 4735done: 4736 /* 4737 * Now copy stuff into the rule. 4738 * If we have a keep-state option, the first instruction 4739 * must be a PROBE_STATE (which is generated here). 4740 * If we have a LOG option, it was stored as the first command, 4741 * and now must be moved to the top of the action part. 4742 */ 4743 dst = (ipfw_insn *)rule->cmd; 4744 4745 /* 4746 * First thing to write into the command stream is the match probability. 4747 */ 4748 if (match_prob != 1) { /* 1 means always match */ 4749 dst->opcode = O_PROB; 4750 dst->len = 2; 4751 *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff); 4752 dst += dst->len; 4753 } 4754 4755 /* 4756 * generate O_PROBE_STATE if necessary 4757 */ 4758 if (have_state && have_state->opcode != O_CHECK_STATE) { 4759 fill_cmd(dst, O_PROBE_STATE, 0, 0); 4760 dst = next_cmd(dst, &rblen); 4761 } 4762 4763 /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */ 4764 for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) { 4765 i = F_LEN(src); 4766 CHECK_RBUFLEN(i); 4767 4768 switch (src->opcode) { 4769 case O_LOG: 4770 case O_KEEP_STATE: 4771 case O_LIMIT: 4772 case O_ALTQ: 4773 case O_TAG: 4774 break; 4775 default: 4776 bcopy(src, dst, i * sizeof(uint32_t)); 4777 dst += i; 4778 } 4779 } 4780 4781 /* 4782 * put back the have_state command as last opcode 4783 */ 4784 if (have_state && have_state->opcode != O_CHECK_STATE) { 4785 i = F_LEN(have_state); 4786 CHECK_RBUFLEN(i); 4787 bcopy(have_state, dst, i * sizeof(uint32_t)); 4788 dst += i; 4789 } 4790 /* 4791 * start action section 4792 */ 4793 rule->act_ofs = dst - rule->cmd; 4794 4795 /* put back O_LOG, O_ALTQ, O_TAG if necessary */ 4796 if (have_log) { 4797 i = F_LEN(have_log); 4798 CHECK_RBUFLEN(i); 4799 bcopy(have_log, dst, i * sizeof(uint32_t)); 4800 dst += i; 4801 } 4802 if (have_altq) { 4803 i = F_LEN(have_altq); 4804 CHECK_RBUFLEN(i); 4805 bcopy(have_altq, dst, i * sizeof(uint32_t)); 4806 dst += i; 4807 } 4808 if (have_tag) { 4809 i = F_LEN(have_tag); 4810 CHECK_RBUFLEN(i); 4811 bcopy(have_tag, dst, i * sizeof(uint32_t)); 4812 dst += i; 4813 } 4814 4815 /* 4816 * copy all other actions 4817 */ 4818 for (src = (ipfw_insn *)actbuf; src != action; src += i) { 4819 i = F_LEN(src); 4820 CHECK_RBUFLEN(i); 4821 bcopy(src, dst, i * sizeof(uint32_t)); 4822 dst += i; 4823 } 4824 4825 rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd); 4826 *rbufsize = (char *)dst - (char *)rule; 4827} 4828 4829static int 4830compare_ntlv(const void *_a, const void *_b) 4831{ 4832 ipfw_obj_ntlv *a, *b; 4833 4834 a = (ipfw_obj_ntlv *)_a; 4835 b = (ipfw_obj_ntlv *)_b; 4836 4837 if (a->set < b->set) 4838 return (-1); 4839 else if (a->set > b->set) 4840 return (1); 4841 4842 if (a->idx < b->idx) 4843 return (-1); 4844 else if (a->idx > b->idx) 4845 return (1); 4846 4847 if (a->head.type < b->head.type) 4848 return (-1); 4849 else if (a->head.type > b->head.type) 4850 return (1); 4851 4852 return (0); 4853} 4854 4855/* 4856 * Provide kernel with sorted list of referenced objects 4857 */ 4858static void 4859object_sort_ctlv(ipfw_obj_ctlv *ctlv) 4860{ 4861 4862 qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv); 4863} 4864 4865struct object_kt { 4866 uint16_t uidx; 4867 uint16_t type; 4868}; 4869static int 4870compare_object_kntlv(const void *k, const void *v) 4871{ 4872 ipfw_obj_ntlv *ntlv; 4873 struct object_kt key; 4874 4875 key = *((struct object_kt *)k); 4876 ntlv = (ipfw_obj_ntlv *)v; 4877 4878 if (key.uidx < ntlv->idx) 4879 return (-1); 4880 else if (key.uidx > ntlv->idx) 4881 return (1); 4882 4883 if (key.type < ntlv->head.type) 4884 return (-1); 4885 else if (key.type > ntlv->head.type) 4886 return (1); 4887 4888 return (0); 4889} 4890 4891/* 4892 * Finds object name in @ctlv by @idx and @type. 4893 * Uses the following facts: 4894 * 1) All TLVs are the same size 4895 * 2) Kernel implementation provides already sorted list. 4896 * 4897 * Returns table name or NULL. 4898 */ 4899static char * 4900object_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx, uint16_t type) 4901{ 4902 ipfw_obj_ntlv *ntlv; 4903 struct object_kt key; 4904 4905 key.uidx = idx; 4906 key.type = type; 4907 4908 ntlv = bsearch(&key, (ctlv + 1), ctlv->count, ctlv->objsize, 4909 compare_object_kntlv); 4910 4911 if (ntlv != NULL) 4912 return (ntlv->name); 4913 4914 return (NULL); 4915} 4916 4917static char * 4918table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx) 4919{ 4920 4921 return (object_search_ctlv(ctlv, idx, IPFW_TLV_TBL_NAME)); 4922} 4923 4924/* 4925 * Adds one or more rules to ipfw chain. 4926 * Data layout: 4927 * Request: 4928 * [ 4929 * ip_fw3_opheader 4930 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional *1) 4931 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] (*2) (*3) 4932 * ] 4933 * Reply: 4934 * [ 4935 * ip_fw3_opheader 4936 * [ ipfw_obj_ctlv(IPFW_TLV_TBL_LIST) ipfw_obj_ntlv x N ] (optional) 4937 * [ ipfw_obj_ctlv(IPFW_TLV_RULE_LIST) [ ip_fw_rule ip_fw_insn ] x N ] 4938 * ] 4939 * 4940 * Rules in reply are modified to store their actual ruleset number. 4941 * 4942 * (*1) TLVs inside IPFW_TLV_TBL_LIST needs to be sorted ascending 4943 * according to their idx field and there has to be no duplicates. 4944 * (*2) Numbered rules inside IPFW_TLV_RULE_LIST needs to be sorted ascending. 4945 * (*3) Each ip_fw structure needs to be aligned to u64 boundary. 4946 */ 4947void 4948ipfw_add(char *av[]) 4949{ 4950 uint32_t rulebuf[1024]; 4951 int rbufsize, default_off, tlen, rlen; 4952 size_t sz; 4953 struct tidx ts; 4954 struct ip_fw_rule *rule; 4955 caddr_t tbuf; 4956 ip_fw3_opheader *op3; 4957 ipfw_obj_ctlv *ctlv, *tstate; 4958 4959 rbufsize = sizeof(rulebuf); 4960 memset(rulebuf, 0, rbufsize); 4961 memset(&ts, 0, sizeof(ts)); 4962 4963 /* Optimize case with no tables */ 4964 default_off = sizeof(ipfw_obj_ctlv) + sizeof(ip_fw3_opheader); 4965 op3 = (ip_fw3_opheader *)rulebuf; 4966 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 4967 rule = (struct ip_fw_rule *)(ctlv + 1); 4968 rbufsize -= default_off; 4969 4970 compile_rule(av, (uint32_t *)rule, &rbufsize, &ts); 4971 /* Align rule size to u64 boundary */ 4972 rlen = roundup2(rbufsize, sizeof(uint64_t)); 4973 4974 tbuf = NULL; 4975 sz = 0; 4976 tstate = NULL; 4977 if (ts.count != 0) { 4978 /* Some tables. We have to alloc more data */ 4979 tlen = ts.count * sizeof(ipfw_obj_ntlv); 4980 sz = default_off + sizeof(ipfw_obj_ctlv) + tlen + rlen; 4981 4982 if ((tbuf = calloc(1, sz)) == NULL) 4983 err(EX_UNAVAILABLE, "malloc() failed for IP_FW_ADD"); 4984 op3 = (ip_fw3_opheader *)tbuf; 4985 /* Tables first */ 4986 ctlv = (ipfw_obj_ctlv *)(op3 + 1); 4987 ctlv->head.type = IPFW_TLV_TBLNAME_LIST; 4988 ctlv->head.length = sizeof(ipfw_obj_ctlv) + tlen; 4989 ctlv->count = ts.count; 4990 ctlv->objsize = sizeof(ipfw_obj_ntlv); 4991 memcpy(ctlv + 1, ts.idx, tlen); 4992 object_sort_ctlv(ctlv); 4993 tstate = ctlv; 4994 /* Rule next */ 4995 ctlv = (ipfw_obj_ctlv *)((caddr_t)ctlv + ctlv->head.length); 4996 ctlv->head.type = IPFW_TLV_RULE_LIST; 4997 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 4998 ctlv->count = 1; 4999 memcpy(ctlv + 1, rule, rbufsize); 5000 } else { 5001 /* Simply add header */ 5002 sz = rlen + default_off; 5003 memset(ctlv, 0, sizeof(*ctlv)); 5004 ctlv->head.type = IPFW_TLV_RULE_LIST; 5005 ctlv->head.length = sizeof(ipfw_obj_ctlv) + rlen; 5006 ctlv->count = 1; 5007 } 5008 5009 if (do_get3(IP_FW_XADD, op3, &sz) != 0) 5010 err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_XADD"); 5011 5012 if (!co.do_quiet) { 5013 struct format_opts sfo; 5014 struct buf_pr bp; 5015 memset(&sfo, 0, sizeof(sfo)); 5016 sfo.tstate = tstate; 5017 sfo.set_mask = (uint32_t)(-1); 5018 bp_alloc(&bp, 4096); 5019 show_static_rule(&co, &sfo, &bp, rule, NULL); 5020 printf("%s", bp.buf); 5021 bp_free(&bp); 5022 } 5023 5024 if (tbuf != NULL) 5025 free(tbuf); 5026 5027 if (ts.idx != NULL) 5028 free(ts.idx); 5029} 5030 5031/* 5032 * clear the counters or the log counters. 5033 * optname has the following values: 5034 * 0 (zero both counters and logging) 5035 * 1 (zero logging only) 5036 */ 5037void 5038ipfw_zero(int ac, char *av[], int optname) 5039{ 5040 ipfw_range_tlv rt; 5041 uint32_t arg; 5042 int failed = EX_OK; 5043 char const *errstr; 5044 char const *name = optname ? "RESETLOG" : "ZERO"; 5045 5046 optname = optname ? IP_FW_XRESETLOG : IP_FW_XZERO; 5047 memset(&rt, 0, sizeof(rt)); 5048 5049 av++; ac--; 5050 5051 if (ac == 0) { 5052 /* clear all entries */ 5053 rt.flags = IPFW_RCFLAG_ALL; 5054 if (do_range_cmd(optname, &rt) < 0) 5055 err(EX_UNAVAILABLE, "setsockopt(IP_FW_X%s)", name); 5056 if (!co.do_quiet) 5057 printf("%s.\n", optname == IP_FW_XZERO ? 5058 "Accounting cleared":"Logging counts reset"); 5059 5060 return; 5061 } 5062 5063 while (ac) { 5064 /* Rule number */ 5065 if (isdigit(**av)) { 5066 arg = strtonum(*av, 0, 0xffff, &errstr); 5067 if (errstr) 5068 errx(EX_DATAERR, 5069 "invalid rule number %s\n", *av); 5070 rt.start_rule = arg; 5071 rt.end_rule = arg; 5072 rt.flags |= IPFW_RCFLAG_RANGE; 5073 if (co.use_set != 0) { 5074 rt.set = co.use_set - 1; 5075 rt.flags |= IPFW_RCFLAG_SET; 5076 } 5077 if (do_range_cmd(optname, &rt) != 0) { 5078 warn("rule %u: setsockopt(IP_FW_X%s)", 5079 arg, name); 5080 failed = EX_UNAVAILABLE; 5081 } else if (rt.new_set == 0) { 5082 printf("Entry %d not found\n", arg); 5083 failed = EX_UNAVAILABLE; 5084 } else if (!co.do_quiet) 5085 printf("Entry %d %s.\n", arg, 5086 optname == IP_FW_XZERO ? 5087 "cleared" : "logging count reset"); 5088 } else { 5089 errx(EX_USAGE, "invalid rule number ``%s''", *av); 5090 } 5091 av++; ac--; 5092 } 5093 if (failed != EX_OK) 5094 exit(failed); 5095} 5096 5097void 5098ipfw_flush(int force) 5099{ 5100 ipfw_range_tlv rt; 5101 5102 if (!force && !co.do_quiet) { /* need to ask user */ 5103 int c; 5104 5105 printf("Are you sure? [yn] "); 5106 fflush(stdout); 5107 do { 5108 c = toupper(getc(stdin)); 5109 while (c != '\n' && getc(stdin) != '\n') 5110 if (feof(stdin)) 5111 return; /* and do not flush */ 5112 } while (c != 'Y' && c != 'N'); 5113 printf("\n"); 5114 if (c == 'N') /* user said no */ 5115 return; 5116 } 5117 if (co.do_pipe) { 5118 dummynet_flush(); 5119 return; 5120 } 5121 /* `ipfw set N flush` - is the same that `ipfw delete set N` */ 5122 memset(&rt, 0, sizeof(rt)); 5123 if (co.use_set != 0) { 5124 rt.set = co.use_set - 1; 5125 rt.flags = IPFW_RCFLAG_SET; 5126 } else 5127 rt.flags = IPFW_RCFLAG_ALL; 5128 if (do_range_cmd(IP_FW_XDEL, &rt) != 0) 5129 err(EX_UNAVAILABLE, "setsockopt(IP_FW_XDEL)"); 5130 if (!co.do_quiet) 5131 printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules"); 5132} 5133 5134static struct _s_x intcmds[] = { 5135 { "talist", TOK_TALIST }, 5136 { "iflist", TOK_IFLIST }, 5137 { "olist", TOK_OLIST }, 5138 { "vlist", TOK_VLIST }, 5139 { NULL, 0 } 5140}; 5141 5142static struct _s_x otypes[] = { 5143 { "EACTION", IPFW_TLV_EACTION }, 5144 { NULL, 0 } 5145}; 5146 5147static const char* 5148lookup_eaction_name(ipfw_obj_ntlv *ntlv, int cnt, uint16_t type) 5149{ 5150 const char *name; 5151 int i; 5152 5153 name = NULL; 5154 for (i = 0; i < cnt; i++) { 5155 if (ntlv[i].head.type != IPFW_TLV_EACTION) 5156 continue; 5157 if (IPFW_TLV_EACTION_NAME(ntlv[i].idx) != type) 5158 continue; 5159 name = ntlv[i].name; 5160 break; 5161 } 5162 return (name); 5163} 5164 5165static void 5166ipfw_list_objects(int ac, char *av[]) 5167{ 5168 ipfw_obj_lheader req, *olh; 5169 ipfw_obj_ntlv *ntlv; 5170 const char *name; 5171 size_t sz; 5172 int i; 5173 5174 memset(&req, 0, sizeof(req)); 5175 sz = sizeof(req); 5176 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &req.opheader, &sz) != 0) 5177 if (errno != ENOMEM) 5178 return; 5179 5180 sz = req.size; 5181 if ((olh = calloc(1, sz)) == NULL) 5182 return; 5183 5184 olh->size = sz; 5185 if (do_get3(IP_FW_DUMP_SRVOBJECTS, &olh->opheader, &sz) != 0) { 5186 free(olh); 5187 return; 5188 } 5189 5190 if (olh->count > 0) 5191 printf("Objects list:\n"); 5192 else 5193 printf("There are no objects\n"); 5194 ntlv = (ipfw_obj_ntlv *)(olh + 1); 5195 for (i = 0; i < olh->count; i++) { 5196 name = match_value(otypes, ntlv->head.type); 5197 if (name == NULL) 5198 name = lookup_eaction_name( 5199 (ipfw_obj_ntlv *)(olh + 1), olh->count, 5200 ntlv->head.type); 5201 if (name == NULL) 5202 printf(" kidx: %4d\ttype: %10d\tname: %s\n", 5203 ntlv->idx, ntlv->head.type, ntlv->name); 5204 else 5205 printf(" kidx: %4d\ttype: %10s\tname: %s\n", 5206 ntlv->idx, name, ntlv->name); 5207 ntlv++; 5208 } 5209 free(olh); 5210} 5211 5212void 5213ipfw_internal_handler(int ac, char *av[]) 5214{ 5215 int tcmd; 5216 5217 ac--; av++; 5218 NEED1("internal cmd required"); 5219 5220 if ((tcmd = match_token(intcmds, *av)) == -1) 5221 errx(EX_USAGE, "invalid internal sub-cmd: %s", *av); 5222 5223 switch (tcmd) { 5224 case TOK_IFLIST: 5225 ipfw_list_tifaces(); 5226 break; 5227 case TOK_TALIST: 5228 ipfw_list_ta(ac, av); 5229 break; 5230 case TOK_OLIST: 5231 ipfw_list_objects(ac, av); 5232 break; 5233 case TOK_VLIST: 5234 ipfw_list_values(ac, av); 5235 break; 5236 } 5237} 5238 5239static int 5240ipfw_get_tracked_ifaces(ipfw_obj_lheader **polh) 5241{ 5242 ipfw_obj_lheader req, *olh; 5243 size_t sz; 5244 5245 memset(&req, 0, sizeof(req)); 5246 sz = sizeof(req); 5247 5248 if (do_get3(IP_FW_XIFLIST, &req.opheader, &sz) != 0) { 5249 if (errno != ENOMEM) 5250 return (errno); 5251 } 5252 5253 sz = req.size; 5254 if ((olh = calloc(1, sz)) == NULL) 5255 return (ENOMEM); 5256 5257 olh->size = sz; 5258 if (do_get3(IP_FW_XIFLIST, &olh->opheader, &sz) != 0) { 5259 free(olh); 5260 return (errno); 5261 } 5262 5263 *polh = olh; 5264 return (0); 5265} 5266 5267static int 5268ifinfo_cmp(const void *a, const void *b) 5269{ 5270 ipfw_iface_info *ia, *ib; 5271 5272 ia = (ipfw_iface_info *)a; 5273 ib = (ipfw_iface_info *)b; 5274 5275 return (stringnum_cmp(ia->ifname, ib->ifname)); 5276} 5277 5278/* 5279 * Retrieves table list from kernel, 5280 * optionally sorts it and calls requested function for each table. 5281 * Returns 0 on success. 5282 */ 5283static void 5284ipfw_list_tifaces() 5285{ 5286 ipfw_obj_lheader *olh; 5287 ipfw_iface_info *info; 5288 int i, error; 5289 5290 if ((error = ipfw_get_tracked_ifaces(&olh)) != 0) 5291 err(EX_OSERR, "Unable to request ipfw tracked interface list"); 5292 5293 5294 qsort(olh + 1, olh->count, olh->objsize, ifinfo_cmp); 5295 5296 info = (ipfw_iface_info *)(olh + 1); 5297 for (i = 0; i < olh->count; i++) { 5298 if (info->flags & IPFW_IFFLAG_RESOLVED) 5299 printf("%s ifindex: %d refcount: %u changes: %u\n", 5300 info->ifname, info->ifindex, info->refcnt, 5301 info->gencnt); 5302 else 5303 printf("%s ifindex: unresolved refcount: %u changes: %u\n", 5304 info->ifname, info->refcnt, info->gencnt); 5305 info = (ipfw_iface_info *)((caddr_t)info + olh->objsize); 5306 } 5307 5308 free(olh); 5309} 5310 5311 5312 5313 5314