--- /dev/null
+/*
+ * Copyright (c) 2002-2003 Luigi Rizzo
+ * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
+ * Copyright (c) 1994 Ugen J.S.Antsilevich
+ *
+ * Idea and grammar partially left from:
+ * Copyright (c) 1993 Daniel Boulet
+ *
+ * Redistribution and use in source forms, with and without modification,
+ * are permitted provided that this entire comment appears intact.
+ *
+ * Redistribution in binary form may occur without any restrictions.
+ * Obviously, it would be nice if you gave credit where credit is due
+ * but requiring it would be too onerous.
+ *
+ * This software is provided ``AS IS'' without any warranties of any kind.
+ *
+ * NEW command line interface for IP firewall facility
+ *
+ * $FreeBSD: head/sbin/ipfw/ipfw2.c 187983 2009-02-01 16:00:49Z luigi $
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/sockio.h>
+#include <sys/sysctl.h>
+
+#include "ipfw2.h"
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <grp.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <time.h> /* ctime */
+#include <timeconv.h> /* _long_to_time */
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <net/ethernet.h>
+#include <net/if.h> /* only IFNAMSIZ */
+#include <netinet/in.h>
+#include <netinet/in_systm.h> /* only n_short, n_long */
+#include <netinet/ip.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/ip_fw.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+
+struct cmdline_opts co; /* global options */
+
+int resvd_set_number = RESVD_SET;
+
+#define GET_UINT_ARG(arg, min, max, tok, s_x) do { \
+ if (!ac) \
+ errx(EX_USAGE, "%s: missing argument", match_value(s_x, tok)); \
+ if (_substrcmp(*av, "tablearg") == 0) { \
+ arg = IP_FW_TABLEARG; \
+ break; \
+ } \
+ \
+ { \
+ long val; \
+ char *end; \
+ \
+ val = strtol(*av, &end, 10); \
+ \
+ if (!isdigit(**av) || *end != '\0' || (val == 0 && errno == EINVAL)) \
+ errx(EX_DATAERR, "%s: invalid argument: %s", \
+ match_value(s_x, tok), *av); \
+ \
+ if (errno == ERANGE || val < min || val > max) \
+ errx(EX_DATAERR, "%s: argument is out of range (%u..%u): %s", \
+ match_value(s_x, tok), min, max, *av); \
+ \
+ if (val == IP_FW_TABLEARG) \
+ errx(EX_DATAERR, "%s: illegal argument value: %s", \
+ match_value(s_x, tok), *av); \
+ arg = val; \
+ } \
+} while (0)
+
+static void
+PRINT_UINT_ARG(const char *str, uint32_t arg)
+{
+ if (str != NULL)
+ printf("%s",str);
+ if (arg == IP_FW_TABLEARG)
+ printf("tablearg");
+ else
+ printf("%u", arg);
+}
+
+static struct _s_x f_tcpflags[] = {
+ { "syn", TH_SYN },
+ { "fin", TH_FIN },
+ { "ack", TH_ACK },
+ { "psh", TH_PUSH },
+ { "rst", TH_RST },
+ { "urg", TH_URG },
+ { "tcp flag", 0 },
+ { NULL, 0 }
+};
+
+static struct _s_x f_tcpopts[] = {
+ { "mss", IP_FW_TCPOPT_MSS },
+ { "maxseg", IP_FW_TCPOPT_MSS },
+ { "window", IP_FW_TCPOPT_WINDOW },
+ { "sack", IP_FW_TCPOPT_SACK },
+ { "ts", IP_FW_TCPOPT_TS },
+ { "timestamp", IP_FW_TCPOPT_TS },
+ { "cc", IP_FW_TCPOPT_CC },
+ { "tcp option", 0 },
+ { NULL, 0 }
+};
+
+/*
+ * IP options span the range 0 to 255 so we need to remap them
+ * (though in fact only the low 5 bits are significant).
+ */
+static struct _s_x f_ipopts[] = {
+ { "ssrr", IP_FW_IPOPT_SSRR},
+ { "lsrr", IP_FW_IPOPT_LSRR},
+ { "rr", IP_FW_IPOPT_RR},
+ { "ts", IP_FW_IPOPT_TS},
+ { "ip option", 0 },
+ { NULL, 0 }
+};
+
+static struct _s_x f_iptos[] = {
+ { "lowdelay", IPTOS_LOWDELAY},
+ { "throughput", IPTOS_THROUGHPUT},
+ { "reliability", IPTOS_RELIABILITY},
+ { "mincost", IPTOS_MINCOST},
+ { "congestion", IPTOS_ECN_CE},
+ { "ecntransport", IPTOS_ECN_ECT0},
+ { "ip tos option", 0},
+ { NULL, 0 }
+};
+
+static struct _s_x limit_masks[] = {
+ {"all", DYN_SRC_ADDR|DYN_SRC_PORT|DYN_DST_ADDR|DYN_DST_PORT},
+ {"src-addr", DYN_SRC_ADDR},
+ {"src-port", DYN_SRC_PORT},
+ {"dst-addr", DYN_DST_ADDR},
+ {"dst-port", DYN_DST_PORT},
+ {NULL, 0}
+};
+
+/*
+ * we use IPPROTO_ETHERTYPE as a fake protocol id to call the print routines
+ * This is only used in this code.
+ */
+#define IPPROTO_ETHERTYPE 0x1000
+static struct _s_x ether_types[] = {
+ /*
+ * Note, we cannot use "-:&/" in the names because they are field
+ * separators in the type specifications. Also, we use s = NULL as
+ * end-delimiter, because a type of 0 can be legal.
+ */
+ { "ip", 0x0800 },
+ { "ipv4", 0x0800 },
+ { "ipv6", 0x86dd },
+ { "arp", 0x0806 },
+ { "rarp", 0x8035 },
+ { "vlan", 0x8100 },
+ { "loop", 0x9000 },
+ { "trail", 0x1000 },
+ { "at", 0x809b },
+ { "atalk", 0x809b },
+ { "aarp", 0x80f3 },
+ { "pppoe_disc", 0x8863 },
+ { "pppoe_sess", 0x8864 },
+ { "ipx_8022", 0x00E0 },
+ { "ipx_8023", 0x0000 },
+ { "ipx_ii", 0x8137 },
+ { "ipx_snap", 0x8137 },
+ { "ipx", 0x8137 },
+ { "ns", 0x0600 },
+ { NULL, 0 }
+};
+
+
+static struct _s_x rule_actions[] = {
+ { "accept", TOK_ACCEPT },
+ { "pass", TOK_ACCEPT },
+ { "allow", TOK_ACCEPT },
+ { "permit", TOK_ACCEPT },
+ { "count", TOK_COUNT },
+ { "pipe", TOK_PIPE },
+ { "queue", TOK_QUEUE },
+ { "divert", TOK_DIVERT },
+ { "tee", TOK_TEE },
+ { "netgraph", TOK_NETGRAPH },
+ { "ngtee", TOK_NGTEE },
+ { "fwd", TOK_FORWARD },
+ { "forward", TOK_FORWARD },
+ { "skipto", TOK_SKIPTO },
+ { "deny", TOK_DENY },
+ { "drop", TOK_DENY },
+ { "reject", TOK_REJECT },
+ { "reset6", TOK_RESET6 },
+ { "reset", TOK_RESET },
+ { "unreach6", TOK_UNREACH6 },
+ { "unreach", TOK_UNREACH },
+ { "check-state", TOK_CHECKSTATE },
+ { "//", TOK_COMMENT },
+ { "nat", TOK_NAT },
+ { "reass", TOK_REASS },
+ { "setfib", TOK_SETFIB },
+ { NULL, 0 } /* terminator */
+};
+
+static struct _s_x rule_action_params[] = {
+ { "altq", TOK_ALTQ },
+ { "log", TOK_LOG },
+ { "tag", TOK_TAG },
+ { "untag", TOK_UNTAG },
+ { NULL, 0 } /* terminator */
+};
+
+static struct _s_x rule_options[] = {
+ { "tagged", TOK_TAGGED },
+ { "uid", TOK_UID },
+ { "gid", TOK_GID },
+ { "jail", TOK_JAIL },
+ { "in", TOK_IN },
+ { "limit", TOK_LIMIT },
+ { "keep-state", TOK_KEEPSTATE },
+ { "bridged", TOK_LAYER2 },
+ { "layer2", TOK_LAYER2 },
+ { "out", TOK_OUT },
+ { "diverted", TOK_DIVERTED },
+ { "diverted-loopback", TOK_DIVERTEDLOOPBACK },
+ { "diverted-output", TOK_DIVERTEDOUTPUT },
+ { "xmit", TOK_XMIT },
+ { "recv", TOK_RECV },
+ { "via", TOK_VIA },
+ { "fragment", TOK_FRAG },
+ { "frag", TOK_FRAG },
+ { "fib", TOK_FIB },
+ { "ipoptions", TOK_IPOPTS },
+ { "ipopts", TOK_IPOPTS },
+ { "iplen", TOK_IPLEN },
+ { "ipid", TOK_IPID },
+ { "ipprecedence", TOK_IPPRECEDENCE },
+ { "iptos", TOK_IPTOS },
+ { "ipttl", TOK_IPTTL },
+ { "ipversion", TOK_IPVER },
+ { "ipver", TOK_IPVER },
+ { "estab", TOK_ESTAB },
+ { "established", TOK_ESTAB },
+ { "setup", TOK_SETUP },
+ { "tcpdatalen", TOK_TCPDATALEN },
+ { "tcpflags", TOK_TCPFLAGS },
+ { "tcpflgs", TOK_TCPFLAGS },
+ { "tcpoptions", TOK_TCPOPTS },
+ { "tcpopts", TOK_TCPOPTS },
+ { "tcpseq", TOK_TCPSEQ },
+ { "tcpack", TOK_TCPACK },
+ { "tcpwin", TOK_TCPWIN },
+ { "icmptype", TOK_ICMPTYPES },
+ { "icmptypes", TOK_ICMPTYPES },
+ { "dst-ip", TOK_DSTIP },
+ { "src-ip", TOK_SRCIP },
+ { "dst-port", TOK_DSTPORT },
+ { "src-port", TOK_SRCPORT },
+ { "proto", TOK_PROTO },
+ { "MAC", TOK_MAC },
+ { "mac", TOK_MAC },
+ { "mac-type", TOK_MACTYPE },
+ { "verrevpath", TOK_VERREVPATH },
+ { "versrcreach", TOK_VERSRCREACH },
+ { "antispoof", TOK_ANTISPOOF },
+ { "ipsec", TOK_IPSEC },
+ { "icmp6type", TOK_ICMP6TYPES },
+ { "icmp6types", TOK_ICMP6TYPES },
+ { "ext6hdr", TOK_EXT6HDR},
+ { "flow-id", TOK_FLOWID},
+ { "ipv6", TOK_IPV6},
+ { "ip6", TOK_IPV6},
+ { "ipv4", TOK_IPV4},
+ { "ip4", TOK_IPV4},
+ { "dst-ipv6", TOK_DSTIP6},
+ { "dst-ip6", TOK_DSTIP6},
+ { "src-ipv6", TOK_SRCIP6},
+ { "src-ip6", TOK_SRCIP6},
+ { "//", TOK_COMMENT },
+
+ { "not", TOK_NOT }, /* pseudo option */
+ { "!", /* escape ? */ TOK_NOT }, /* pseudo option */
+ { "or", TOK_OR }, /* pseudo option */
+ { "|", /* escape */ TOK_OR }, /* pseudo option */
+ { "{", TOK_STARTBRACE }, /* pseudo option */
+ { "(", TOK_STARTBRACE }, /* pseudo option */
+ { "}", TOK_ENDBRACE }, /* pseudo option */
+ { ")", TOK_ENDBRACE }, /* pseudo option */
+ { NULL, 0 } /* terminator */
+};
+
+/*
+ * The following is used to generate a printable argument for
+ * 64-bit numbers, irrespective of platform alignment and bit size.
+ * Because all the printf in this program use %llu as a format,
+ * we just return an unsigned long long, which is larger than
+ * we need in certain cases, but saves the hassle of using
+ * PRIu64 as a format specifier.
+ * We don't care about inlining, this is not performance critical code.
+ */
+unsigned long long
+align_uint64(const uint64_t *pll)
+{
+ uint64_t ret;
+
+ bcopy (pll, &ret, sizeof(ret));
+ return ret;
+}
+
+void *
+safe_calloc(size_t number, size_t size)
+{
+ void *ret = calloc(number, size);
+
+ if (ret == NULL)
+ err(EX_OSERR, "calloc");
+ return ret;
+}
+
+void *
+safe_realloc(void *ptr, size_t size)
+{
+ void *ret = realloc(ptr, size);
+
+ if (ret == NULL)
+ err(EX_OSERR, "realloc");
+ return ret;
+}
+
+/*
+ * conditionally runs the command.
+ */
+int
+do_cmd(int optname, void *optval, uintptr_t optlen)
+{
+ static int s = -1; /* the socket */
+ int i;
+
+ if (co.test_only)
+ return 0;
+
+ if (s == -1)
+ s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
+ if (s < 0)
+ err(EX_UNAVAILABLE, "socket");
+
+ if (optname == IP_FW_GET || optname == IP_DUMMYNET_GET ||
+ optname == IP_FW_ADD || optname == IP_FW_TABLE_LIST ||
+ optname == IP_FW_TABLE_GETSIZE ||
+ optname == IP_FW_NAT_GET_CONFIG ||
+ optname == IP_FW_NAT_GET_LOG)
+ i = getsockopt(s, IPPROTO_IP, optname, optval,
+ (socklen_t *)optlen);
+ else
+ i = setsockopt(s, IPPROTO_IP, optname, optval, optlen);
+ return i;
+}
+
+/**
+ * match_token takes a table and a string, returns the value associated
+ * with the string (-1 in case of failure).
+ */
+int
+match_token(struct _s_x *table, char *string)
+{
+ struct _s_x *pt;
+ uint i = strlen(string);
+
+ for (pt = table ; i && pt->s != NULL ; pt++)
+ if (strlen(pt->s) == i && !bcmp(string, pt->s, i))
+ return pt->x;
+ return -1;
+}
+
+/**
+ * match_value takes a table and a value, returns the string associated
+ * with the value (NULL in case of failure).
+ */
+char const *
+match_value(struct _s_x *p, int value)
+{
+ for (; p->s != NULL; p++)
+ if (p->x == value)
+ return p->s;
+ return NULL;
+}
+
+/*
+ * _substrcmp takes two strings and returns 1 if they do not match,
+ * and 0 if they match exactly or the first string is a sub-string
+ * of the second. A warning is printed to stderr in the case that the
+ * first string is a sub-string of the second.
+ *
+ * This function will be removed in the future through the usual
+ * deprecation process.
+ */
+int
+_substrcmp(const char *str1, const char* str2)
+{
+
+ if (strncmp(str1, str2, strlen(str1)) != 0)
+ return 1;
+
+ if (strlen(str1) != strlen(str2))
+ warnx("DEPRECATED: '%s' matched '%s' as a sub-string",
+ str1, str2);
+ return 0;
+}
+
+/*
+ * _substrcmp2 takes three strings and returns 1 if the first two do not match,
+ * and 0 if they match exactly or the second string is a sub-string
+ * of the first. A warning is printed to stderr in the case that the
+ * first string does not match the third.
+ *
+ * This function exists to warn about the bizzare construction
+ * strncmp(str, "by", 2) which is used to allow people to use a shotcut
+ * for "bytes". The problem is that in addition to accepting "by",
+ * "byt", "byte", and "bytes", it also excepts "by_rabid_dogs" and any
+ * other string beginning with "by".
+ *
+ * This function will be removed in the future through the usual
+ * deprecation process.
+ */
+int
+_substrcmp2(const char *str1, const char* str2, const char* str3)
+{
+
+ if (strncmp(str1, str2, strlen(str2)) != 0)
+ return 1;
+
+ if (strcmp(str1, str3) != 0)
+ warnx("DEPRECATED: '%s' matched '%s'",
+ str1, str3);
+ return 0;
+}
+
+/*
+ * prints one port, symbolic or numeric
+ */
+static void
+print_port(int proto, uint16_t port)
+{
+
+ if (proto == IPPROTO_ETHERTYPE) {
+ char const *s;
+
+ if (co.do_resolv && (s = match_value(ether_types, port)) )
+ printf("%s", s);
+ else
+ printf("0x%04x", port);
+ } else {
+ struct servent *se = NULL;
+ if (co.do_resolv) {
+ struct protoent *pe = getprotobynumber(proto);
+
+ se = getservbyport(htons(port), pe ? pe->p_name : NULL);
+ }
+ if (se)
+ printf("%s", se->s_name);
+ else
+ printf("%d", port);
+ }
+}
+
+static struct _s_x _port_name[] = {
+ {"dst-port", O_IP_DSTPORT},
+ {"src-port", O_IP_SRCPORT},
+ {"ipid", O_IPID},
+ {"iplen", O_IPLEN},
+ {"ipttl", O_IPTTL},
+ {"mac-type", O_MAC_TYPE},
+ {"tcpdatalen", O_TCPDATALEN},
+ {"tagged", O_TAGGED},
+ {NULL, 0}
+};
+
+/*
+ * Print the values in a list 16-bit items of the types above.
+ * XXX todo: add support for mask.
+ */
+static void
+print_newports(ipfw_insn_u16 *cmd, int proto, int opcode)
+{
+ uint16_t *p = cmd->ports;
+ int i;
+ char const *sep;
+
+ if (opcode != 0) {
+ sep = match_value(_port_name, opcode);
+ if (sep == NULL)
+ sep = "???";
+ printf (" %s", sep);
+ }
+ sep = " ";
+ for (i = F_LEN((ipfw_insn *)cmd) - 1; i > 0; i--, p += 2) {
+ printf("%s", sep);
+ print_port(proto, p[0]);
+ if (p[0] != p[1]) {
+ printf("-");
+ print_port(proto, p[1]);
+ }
+ sep = ",";
+ }
+}
+
+/*
+ * Like strtol, but also translates service names into port numbers
+ * for some protocols.
+ * In particular:
+ * proto == -1 disables the protocol check;
+ * proto == IPPROTO_ETHERTYPE looks up an internal table
+ * proto == <some value in /etc/protocols> matches the values there.
+ * Returns *end == s in case the parameter is not found.
+ */
+static int
+strtoport(char *s, char **end, int base, int proto)
+{
+ char *p, *buf;
+ char *s1;
+ int i;
+
+ *end = s; /* default - not found */
+ if (*s == '\0')
+ return 0; /* not found */
+
+ if (isdigit(*s))
+ return strtol(s, end, base);
+
+ /*
+ * find separator. '\\' escapes the next char.
+ */
+ for (s1 = s; *s1 && (isalnum(*s1) || *s1 == '\\') ; s1++)
+ if (*s1 == '\\' && s1[1] != '\0')
+ s1++;
+
+ buf = safe_calloc(s1 - s + 1, 1);
+
+ /*
+ * copy into a buffer skipping backslashes
+ */
+ for (p = s, i = 0; p != s1 ; p++)
+ if (*p != '\\')
+ buf[i++] = *p;
+ buf[i++] = '\0';
+
+ if (proto == IPPROTO_ETHERTYPE) {
+ i = match_token(ether_types, buf);
+ free(buf);
+ if (i != -1) { /* found */
+ *end = s1;
+ return i;
+ }
+ } else {
+ struct protoent *pe = NULL;
+ struct servent *se;
+
+ if (proto != 0)
+ pe = getprotobynumber(proto);
+ setservent(1);
+ se = getservbyname(buf, pe ? pe->p_name : NULL);
+ free(buf);
+ if (se != NULL) {
+ *end = s1;
+ return ntohs(se->s_port);
+ }
+ }
+ return 0; /* not found */
+}
+
+/*
+ * Fill the body of the command with the list of port ranges.
+ */
+static int
+fill_newports(ipfw_insn_u16 *cmd, char *av, int proto)
+{
+ uint16_t a, b, *p = cmd->ports;
+ int i = 0;
+ char *s = av;
+
+ while (*s) {
+ a = strtoport(av, &s, 0, proto);
+ if (s == av) /* empty or invalid argument */
+ return (0);
+
+ switch (*s) {
+ case '-': /* a range */
+ av = s + 1;
+ b = strtoport(av, &s, 0, proto);
+ /* Reject expressions like '1-abc' or '1-2-3'. */
+ if (s == av || (*s != ',' && *s != '\0'))
+ return (0);
+ p[0] = a;
+ p[1] = b;
+ break;
+ case ',': /* comma separated list */
+ case '\0':
+ p[0] = p[1] = a;
+ break;
+ default:
+ warnx("port list: invalid separator <%c> in <%s>",
+ *s, av);
+ return (0);
+ }
+
+ i++;
+ p += 2;
+ av = s + 1;
+ }
+ if (i > 0) {
+ if (i + 1 > F_LEN_MASK)
+ errx(EX_DATAERR, "too many ports/ranges\n");
+ cmd->o.len |= i + 1; /* leave F_NOT and F_OR untouched */
+ }
+ return (i);
+}
+
+static struct _s_x icmpcodes[] = {
+ { "net", ICMP_UNREACH_NET },
+ { "host", ICMP_UNREACH_HOST },
+ { "protocol", ICMP_UNREACH_PROTOCOL },
+ { "port", ICMP_UNREACH_PORT },
+ { "needfrag", ICMP_UNREACH_NEEDFRAG },
+ { "srcfail", ICMP_UNREACH_SRCFAIL },
+ { "net-unknown", ICMP_UNREACH_NET_UNKNOWN },
+ { "host-unknown", ICMP_UNREACH_HOST_UNKNOWN },
+ { "isolated", ICMP_UNREACH_ISOLATED },
+ { "net-prohib", ICMP_UNREACH_NET_PROHIB },
+ { "host-prohib", ICMP_UNREACH_HOST_PROHIB },
+ { "tosnet", ICMP_UNREACH_TOSNET },
+ { "toshost", ICMP_UNREACH_TOSHOST },
+ { "filter-prohib", ICMP_UNREACH_FILTER_PROHIB },
+ { "host-precedence", ICMP_UNREACH_HOST_PRECEDENCE },
+ { "precedence-cutoff", ICMP_UNREACH_PRECEDENCE_CUTOFF },
+ { NULL, 0 }
+};
+
+static void
+fill_reject_code(u_short *codep, char *str)
+{
+ int val;
+ char *s;
+
+ val = strtoul(str, &s, 0);
+ if (s == str || *s != '\0' || val >= 0x100)
+ val = match_token(icmpcodes, str);
+ if (val < 0)
+ errx(EX_DATAERR, "unknown ICMP unreachable code ``%s''", str);
+ *codep = val;
+ return;
+}
+
+static void
+print_reject_code(uint16_t code)
+{
+ char const *s = match_value(icmpcodes, code);
+
+ if (s != NULL)
+ printf("unreach %s", s);
+ else
+ printf("unreach %u", code);
+}
+
+/*
+ * Returns the number of bits set (from left) in a contiguous bitmask,
+ * or -1 if the mask is not contiguous.
+ * XXX this needs a proper fix.
+ * This effectively works on masks in big-endian (network) format.
+ * when compiled on little endian architectures.
+ *
+ * First bit is bit 7 of the first byte -- note, for MAC addresses,
+ * the first bit on the wire is bit 0 of the first byte.
+ * len is the max length in bits.
+ */
+int
+contigmask(uint8_t *p, int len)
+{
+ int i, n;
+
+ for (i=0; i<len ; i++)
+ if ( (p[i/8] & (1 << (7 - (i%8)))) == 0) /* first bit unset */
+ break;
+ for (n=i+1; n < len; n++)
+ if ( (p[n/8] & (1 << (7 - (n%8)))) != 0)
+ return -1; /* mask not contiguous */
+ return i;
+}
+
+/*
+ * print flags set/clear in the two bitmasks passed as parameters.
+ * There is a specialized check for f_tcpflags.
+ */
+static void
+print_flags(char const *name, ipfw_insn *cmd, struct _s_x *list)
+{
+ char const *comma = "";
+ int i;
+ uint8_t set = cmd->arg1 & 0xff;
+ uint8_t clear = (cmd->arg1 >> 8) & 0xff;
+
+ if (list == f_tcpflags && set == TH_SYN && clear == TH_ACK) {
+ printf(" setup");
+ return;
+ }
+
+ printf(" %s ", name);
+ for (i=0; list[i].x != 0; i++) {
+ if (set & list[i].x) {
+ set &= ~list[i].x;
+ printf("%s%s", comma, list[i].s);
+ comma = ",";
+ }
+ if (clear & list[i].x) {
+ clear &= ~list[i].x;
+ printf("%s!%s", comma, list[i].s);
+ comma = ",";
+ }
+ }
+}
+
+/*
+ * Print the ip address contained in a command.
+ */
+static void
+print_ip(ipfw_insn_ip *cmd, char const *s)
+{
+ struct hostent *he = NULL;
+ int len = F_LEN((ipfw_insn *)cmd);
+ uint32_t *a = ((ipfw_insn_u32 *)cmd)->d;
+
+ printf("%s%s ", cmd->o.len & F_NOT ? " not": "", s);
+
+ if (cmd->o.opcode == O_IP_SRC_ME || cmd->o.opcode == O_IP_DST_ME) {
+ printf("me");
+ return;
+ }
+ if (cmd->o.opcode == O_IP_SRC_LOOKUP ||
+ cmd->o.opcode == O_IP_DST_LOOKUP) {
+ printf("table(%u", ((ipfw_insn *)cmd)->arg1);
+ if (len == F_INSN_SIZE(ipfw_insn_u32))
+ printf(",%u", *a);
+ printf(")");
+ return;
+ }
+ if (cmd->o.opcode == O_IP_SRC_SET || cmd->o.opcode == O_IP_DST_SET) {
+ uint32_t x, *map = (uint32_t *)&(cmd->mask);
+ int i, j;
+ char comma = '{';
+
+ x = cmd->o.arg1 - 1;
+ x = htonl( ~x );
+ cmd->addr.s_addr = htonl(cmd->addr.s_addr);
+ printf("%s/%d", inet_ntoa(cmd->addr),
+ contigmask((uint8_t *)&x, 32));
+ x = cmd->addr.s_addr = htonl(cmd->addr.s_addr);
+ x &= 0xff; /* base */
+ /*
+ * Print bits and ranges.
+ * Locate first bit set (i), then locate first bit unset (j).
+ * If we have 3+ consecutive bits set, then print them as a
+ * range, otherwise only print the initial bit and rescan.
+ */
+ for (i=0; i < cmd->o.arg1; i++)
+ if (map[i/32] & (1<<(i & 31))) {
+ for (j=i+1; j < cmd->o.arg1; j++)
+ if (!(map[ j/32] & (1<<(j & 31))))
+ break;
+ printf("%c%d", comma, i+x);
+ if (j>i+2) { /* range has at least 3 elements */
+ printf("-%d", j-1+x);
+ i = j-1;
+ }
+ comma = ',';
+ }
+ printf("}");
+ return;
+ }
+ /*
+ * len == 2 indicates a single IP, whereas lists of 1 or more
+ * addr/mask pairs have len = (2n+1). We convert len to n so we
+ * use that to count the number of entries.
+ */
+ for (len = len / 2; len > 0; len--, a += 2) {
+ int mb = /* mask length */
+ (cmd->o.opcode == O_IP_SRC || cmd->o.opcode == O_IP_DST) ?
+ 32 : contigmask((uint8_t *)&(a[1]), 32);
+ if (mb == 32 && co.do_resolv)
+ he = gethostbyaddr((char *)&(a[0]), sizeof(u_long), AF_INET);
+ if (he != NULL) /* resolved to name */
+ printf("%s", he->h_name);
+ else if (mb == 0) /* any */
+ printf("any");
+ else { /* numeric IP followed by some kind of mask */
+ printf("%s", inet_ntoa( *((struct in_addr *)&a[0]) ) );
+ if (mb < 0)
+ printf(":%s", inet_ntoa( *((struct in_addr *)&a[1]) ) );
+ else if (mb < 32)
+ printf("/%d", mb);
+ }
+ if (len > 1)
+ printf(",");
+ }
+}
+
+/*
+ * prints a MAC address/mask pair
+ */
+static void
+print_mac(uint8_t *addr, uint8_t *mask)
+{
+ int l = contigmask(mask, 48);
+
+ if (l == 0)
+ printf(" any");
+ else {
+ printf(" %02x:%02x:%02x:%02x:%02x:%02x",
+ addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+ if (l == -1)
+ printf("&%02x:%02x:%02x:%02x:%02x:%02x",
+ mask[0], mask[1], mask[2],
+ mask[3], mask[4], mask[5]);
+ else if (l < 48)
+ printf("/%d", l);
+ }
+}
+
+static void
+fill_icmptypes(ipfw_insn_u32 *cmd, char *av)
+{
+ uint8_t type;
+
+ cmd->d[0] = 0;
+ while (*av) {
+ if (*av == ',')
+ av++;
+
+ type = strtoul(av, &av, 0);
+
+ if (*av != ',' && *av != '\0')
+ errx(EX_DATAERR, "invalid ICMP type");
+
+ if (type > 31)
+ errx(EX_DATAERR, "ICMP type out of range");
+
+ cmd->d[0] |= 1 << type;
+ }
+ cmd->o.opcode = O_ICMPTYPE;
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
+}
+
+static void
+print_icmptypes(ipfw_insn_u32 *cmd)
+{
+ int i;
+ char sep= ' ';
+
+ printf(" icmptypes");
+ for (i = 0; i < 32; i++) {
+ if ( (cmd->d[0] & (1 << (i))) == 0)
+ continue;
+ printf("%c%d", sep, i);
+ sep = ',';
+ }
+}
+
+/*
+ * show_ipfw() prints the body of an ipfw rule.
+ * Because the standard rule has at least proto src_ip dst_ip, we use
+ * a helper function to produce these entries if not provided explicitly.
+ * The first argument is the list of fields we have, the second is
+ * the list of fields we want to be printed.
+ *
+ * Special cases if we have provided a MAC header:
+ * + if the rule does not contain IP addresses/ports, do not print them;
+ * + if the rule does not contain an IP proto, print "all" instead of "ip";
+ *
+ * Once we have 'have_options', IP header fields are printed as options.
+ */
+#define HAVE_PROTO 0x0001
+#define HAVE_SRCIP 0x0002
+#define HAVE_DSTIP 0x0004
+#define HAVE_PROTO4 0x0008
+#define HAVE_PROTO6 0x0010
+#define HAVE_OPTIONS 0x8000
+
+#define HAVE_IP (HAVE_PROTO | HAVE_SRCIP | HAVE_DSTIP)
+static void
+show_prerequisites(int *flags, int want, int cmd __unused)
+{
+ if (co.comment_only)
+ return;
+ if ( (*flags & HAVE_IP) == HAVE_IP)
+ *flags |= HAVE_OPTIONS;
+
+ if ( !(*flags & HAVE_OPTIONS)) {
+ if ( !(*flags & HAVE_PROTO) && (want & HAVE_PROTO)) {
+ if ( (*flags & HAVE_PROTO4))
+ printf(" ip4");
+ else if ( (*flags & HAVE_PROTO6))
+ printf(" ip6");
+ else
+ printf(" ip");
+ }
+ if ( !(*flags & HAVE_SRCIP) && (want & HAVE_SRCIP))
+ printf(" from any");
+ if ( !(*flags & HAVE_DSTIP) && (want & HAVE_DSTIP))
+ printf(" to any");
+ }
+ *flags |= want;
+}
+
+static void
+show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
+{
+ static int twidth = 0;
+ int l;
+ ipfw_insn *cmd, *tagptr = NULL;
+ const char *comment = NULL; /* ptr to comment if we have one */
+ int proto = 0; /* default */
+ int flags = 0; /* prerequisites */
+ ipfw_insn_log *logptr = NULL; /* set if we find an O_LOG */
+ ipfw_insn_altq *altqptr = NULL; /* set if we find an O_ALTQ */
+ int or_block = 0; /* we are in an or block */
+ uint32_t set_disable;
+
+ bcopy(&rule->next_rule, &set_disable, sizeof(set_disable));
+
+ if (set_disable & (1 << rule->set)) { /* disabled */
+ if (!co.show_sets)
+ return;
+ else
+ printf("# DISABLED ");
+ }
+ printf("%05u ", rule->rulenum);
+
+ if (pcwidth>0 || bcwidth>0)
+ printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
+ bcwidth, align_uint64(&rule->bcnt));
+
+ if (co.do_time == 2)
+ printf("%10u ", rule->timestamp);
+ else if (co.do_time == 1) {
+ char timestr[30];
+ time_t t = (time_t)0;
+
+ if (twidth == 0) {
+ strcpy(timestr, ctime(&t));
+ *strchr(timestr, '\n') = '\0';
+ twidth = strlen(timestr);
+ }
+ if (rule->timestamp) {
+ t = _long_to_time(rule->timestamp);
+
+ strcpy(timestr, ctime(&t));
+ *strchr(timestr, '\n') = '\0';
+ printf("%s ", timestr);
+ } else {
+ printf("%*s", twidth, " ");
+ }
+ }
+
+ if (co.show_sets)
+ printf("set %d ", rule->set);
+
+ /*
+ * print the optional "match probability"
+ */
+ if (rule->cmd_len > 0) {
+ cmd = rule->cmd ;
+ if (cmd->opcode == O_PROB) {
+ ipfw_insn_u32 *p = (ipfw_insn_u32 *)cmd;
+ double d = 1.0 * p->d[0];
+
+ d = (d / 0x7fffffff);
+ printf("prob %f ", d);
+ }
+ }
+
+ /*
+ * first print actions
+ */
+ for (l = rule->cmd_len - rule->act_ofs, cmd = ACTION_PTR(rule);
+ l > 0 ; l -= F_LEN(cmd), cmd += F_LEN(cmd)) {
+ switch(cmd->opcode) {
+ case O_CHECK_STATE:
+ printf("check-state");
+ flags = HAVE_IP; /* avoid printing anything else */
+ break;
+
+ case O_ACCEPT:
+ printf("allow");
+ break;
+
+ case O_COUNT:
+ printf("count");
+ break;
+
+ case O_DENY:
+ printf("deny");
+ break;
+
+ case O_REJECT:
+ if (cmd->arg1 == ICMP_REJECT_RST)
+ printf("reset");
+ else if (cmd->arg1 == ICMP_UNREACH_HOST)
+ printf("reject");
+ else
+ print_reject_code(cmd->arg1);
+ break;
+
+ case O_UNREACH6:
+ if (cmd->arg1 == ICMP6_UNREACH_RST)
+ printf("reset6");
+ else
+ print_unreach6_code(cmd->arg1);
+ break;
+
+ case O_SKIPTO:
+ PRINT_UINT_ARG("skipto ", cmd->arg1);
+ break;
+
+ case O_PIPE:
+ PRINT_UINT_ARG("pipe ", cmd->arg1);
+ break;
+
+ case O_QUEUE:
+ PRINT_UINT_ARG("queue ", cmd->arg1);
+ break;
+
+ case O_DIVERT:
+ PRINT_UINT_ARG("divert ", cmd->arg1);
+ break;
+
+ case O_TEE:
+ PRINT_UINT_ARG("tee ", cmd->arg1);
+ break;
+
+ case O_NETGRAPH:
+ PRINT_UINT_ARG("netgraph ", cmd->arg1);
+ break;
+
+ case O_NGTEE:
+ PRINT_UINT_ARG("ngtee ", cmd->arg1);
+ break;
+
+ case O_FORWARD_IP:
+ {
+ ipfw_insn_sa *s = (ipfw_insn_sa *)cmd;
+
+ if (s->sa.sin_addr.s_addr == INADDR_ANY) {
+ printf("fwd tablearg");
+ } else {
+ printf("fwd %s", inet_ntoa(s->sa.sin_addr));
+ }
+ if (s->sa.sin_port)
+ printf(",%d", s->sa.sin_port);
+ }
+ break;
+
+ case O_LOG: /* O_LOG is printed last */
+ logptr = (ipfw_insn_log *)cmd;
+ break;
+
+ case O_ALTQ: /* O_ALTQ is printed after O_LOG */
+ altqptr = (ipfw_insn_altq *)cmd;
+ break;
+
+ case O_TAG:
+ tagptr = cmd;
+ break;
+
+ case O_NAT:
+ PRINT_UINT_ARG("nat ", cmd->arg1);
+ break;
+
+ case O_SETFIB:
+ PRINT_UINT_ARG("setfib ", cmd->arg1);
+ break;
+
+ case O_REASS:
+ printf("reass");
+ break;
+
+ default:
+ printf("** unrecognized action %d len %d ",
+ cmd->opcode, cmd->len);
+ }
+ }
+ if (logptr) {
+ if (logptr->max_log > 0)
+ printf(" log logamount %d", logptr->max_log);
+ else
+ printf(" log");
+ }
+ if (altqptr) {
+ print_altq_cmd(altqptr);
+ }
+ if (tagptr) {
+ if (tagptr->len & F_NOT)
+ PRINT_UINT_ARG(" untag ", tagptr->arg1);
+ else
+ PRINT_UINT_ARG(" tag ", tagptr->arg1);
+ }
+
+ /*
+ * then print the body.
+ */
+ for (l = rule->act_ofs, cmd = rule->cmd ;
+ l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
+ if ((cmd->len & F_OR) || (cmd->len & F_NOT))
+ continue;
+ if (cmd->opcode == O_IP4) {
+ flags |= HAVE_PROTO4;
+ break;
+ } else if (cmd->opcode == O_IP6) {
+ flags |= HAVE_PROTO6;
+ break;
+ }
+ }
+ if (rule->_pad & 1) { /* empty rules before options */
+ if (!co.do_compact) {
+ show_prerequisites(&flags, HAVE_PROTO, 0);
+ printf(" from any to any");
+ }
+ flags |= HAVE_IP | HAVE_OPTIONS;
+ }
+
+ if (co.comment_only)
+ comment = "...";
+
+ for (l = rule->act_ofs, cmd = rule->cmd ;
+ l > 0 ; l -= F_LEN(cmd) , cmd += F_LEN(cmd)) {
+ /* useful alias */
+ ipfw_insn_u32 *cmd32 = (ipfw_insn_u32 *)cmd;
+
+ if (co.comment_only) {
+ if (cmd->opcode != O_NOP)
+ continue;
+ printf(" // %s\n", (char *)(cmd + 1));
+ return;
+ }
+
+ show_prerequisites(&flags, 0, cmd->opcode);
+
+ switch(cmd->opcode) {
+ case O_PROB:
+ break; /* done already */
+
+ case O_PROBE_STATE:
+ break; /* no need to print anything here */
+
+ case O_IP_SRC:
+ case O_IP_SRC_LOOKUP:
+ case O_IP_SRC_MASK:
+ case O_IP_SRC_ME:
+ case O_IP_SRC_SET:
+ show_prerequisites(&flags, HAVE_PROTO, 0);
+ if (!(flags & HAVE_SRCIP))
+ printf(" from");
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ print_ip((ipfw_insn_ip *)cmd,
+ (flags & HAVE_OPTIONS) ? " src-ip" : "");
+ flags |= HAVE_SRCIP;
+ break;
+
+ case O_IP_DST:
+ case O_IP_DST_LOOKUP:
+ case O_IP_DST_MASK:
+ case O_IP_DST_ME:
+ case O_IP_DST_SET:
+ show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
+ if (!(flags & HAVE_DSTIP))
+ printf(" to");
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ print_ip((ipfw_insn_ip *)cmd,
+ (flags & HAVE_OPTIONS) ? " dst-ip" : "");
+ flags |= HAVE_DSTIP;
+ break;
+
+ case O_IP6_SRC:
+ case O_IP6_SRC_MASK:
+ case O_IP6_SRC_ME:
+ show_prerequisites(&flags, HAVE_PROTO, 0);
+ if (!(flags & HAVE_SRCIP))
+ printf(" from");
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ print_ip6((ipfw_insn_ip6 *)cmd,
+ (flags & HAVE_OPTIONS) ? " src-ip6" : "");
+ flags |= HAVE_SRCIP | HAVE_PROTO;
+ break;
+
+ case O_IP6_DST:
+ case O_IP6_DST_MASK:
+ case O_IP6_DST_ME:
+ show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
+ if (!(flags & HAVE_DSTIP))
+ printf(" to");
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ print_ip6((ipfw_insn_ip6 *)cmd,
+ (flags & HAVE_OPTIONS) ? " dst-ip6" : "");
+ flags |= HAVE_DSTIP;
+ break;
+
+ case O_FLOW6ID:
+ print_flow6id( (ipfw_insn_u32 *) cmd );
+ flags |= HAVE_OPTIONS;
+ break;
+
+ case O_IP_DSTPORT:
+ show_prerequisites(&flags, HAVE_IP, 0);
+ case O_IP_SRCPORT:
+ show_prerequisites(&flags, HAVE_PROTO|HAVE_SRCIP, 0);
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ if (cmd->len & F_NOT)
+ printf(" not");
+ print_newports((ipfw_insn_u16 *)cmd, proto,
+ (flags & HAVE_OPTIONS) ? cmd->opcode : 0);
+ break;
+
+ case O_PROTO: {
+ struct protoent *pe = NULL;
+
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ if (cmd->len & F_NOT)
+ printf(" not");
+ proto = cmd->arg1;
+ pe = getprotobynumber(cmd->arg1);
+ if ((flags & (HAVE_PROTO4 | HAVE_PROTO6)) &&
+ !(flags & HAVE_PROTO))
+ show_prerequisites(&flags,
+ HAVE_IP | HAVE_OPTIONS, 0);
+ if (flags & HAVE_OPTIONS)
+ printf(" proto");
+ if (pe)
+ printf(" %s", pe->p_name);
+ else
+ printf(" %u", cmd->arg1);
+ }
+ flags |= HAVE_PROTO;
+ break;
+
+ default: /*options ... */
+ if (!(cmd->len & (F_OR|F_NOT)))
+ if (((cmd->opcode == O_IP6) &&
+ (flags & HAVE_PROTO6)) ||
+ ((cmd->opcode == O_IP4) &&
+ (flags & HAVE_PROTO4)))
+ break;
+ show_prerequisites(&flags, HAVE_IP | HAVE_OPTIONS, 0);
+ if ((cmd->len & F_OR) && !or_block)
+ printf(" {");
+ if (cmd->len & F_NOT && cmd->opcode != O_IN)
+ printf(" not");
+ switch(cmd->opcode) {
+ case O_MACADDR2: {
+ ipfw_insn_mac *m = (ipfw_insn_mac *)cmd;
+
+ printf(" MAC");
+ print_mac(m->addr, m->mask);
+ print_mac(m->addr + 6, m->mask + 6);
+ }
+ break;
+
+ case O_MAC_TYPE:
+ print_newports((ipfw_insn_u16 *)cmd,
+ IPPROTO_ETHERTYPE, cmd->opcode);
+ break;
+
+
+ case O_FRAG:
+ printf(" frag");
+ break;
+
+ case O_FIB:
+ printf(" fib %u", cmd->arg1 );
+ break;
+
+ case O_IN:
+ printf(cmd->len & F_NOT ? " out" : " in");
+ break;
+
+ case O_DIVERTED:
+ switch (cmd->arg1) {
+ case 3:
+ printf(" diverted");
+ break;
+ case 1:
+ printf(" diverted-loopback");
+ break;
+ case 2:
+ printf(" diverted-output");
+ break;
+ default:
+ printf(" diverted-?<%u>", cmd->arg1);
+ break;
+ }
+ break;
+
+ case O_LAYER2:
+ printf(" layer2");
+ break;
+ case O_XMIT:
+ case O_RECV:
+ case O_VIA:
+ {
+ char const *s;
+ ipfw_insn_if *cmdif = (ipfw_insn_if *)cmd;
+
+ if (cmd->opcode == O_XMIT)
+ s = "xmit";
+ else if (cmd->opcode == O_RECV)
+ s = "recv";
+ else /* if (cmd->opcode == O_VIA) */
+ s = "via";
+ if (cmdif->name[0] == '\0')
+ printf(" %s %s", s,
+ inet_ntoa(cmdif->p.ip));
+ else
+ printf(" %s %s", s, cmdif->name);
+
+ break;
+ }
+ case O_IPID:
+ if (F_LEN(cmd) == 1)
+ printf(" ipid %u", cmd->arg1 );
+ else
+ print_newports((ipfw_insn_u16 *)cmd, 0,
+ O_IPID);
+ break;
+
+ case O_IPTTL:
+ if (F_LEN(cmd) == 1)
+ printf(" ipttl %u", cmd->arg1 );
+ else
+ print_newports((ipfw_insn_u16 *)cmd, 0,
+ O_IPTTL);
+ break;
+
+ case O_IPVER:
+ printf(" ipver %u", cmd->arg1 );
+ break;
+
+ case O_IPPRECEDENCE:
+ printf(" ipprecedence %u", (cmd->arg1) >> 5 );
+ break;
+
+ case O_IPLEN:
+ if (F_LEN(cmd) == 1)
+ printf(" iplen %u", cmd->arg1 );
+ else
+ print_newports((ipfw_insn_u16 *)cmd, 0,
+ O_IPLEN);
+ break;
+
+ case O_IPOPT:
+ print_flags("ipoptions", cmd, f_ipopts);
+ break;
+
+ case O_IPTOS:
+ print_flags("iptos", cmd, f_iptos);
+ break;
+
+ case O_ICMPTYPE:
+ print_icmptypes((ipfw_insn_u32 *)cmd);
+ break;
+
+ case O_ESTAB:
+ printf(" established");
+ break;
+
+ case O_TCPDATALEN:
+ if (F_LEN(cmd) == 1)
+ printf(" tcpdatalen %u", cmd->arg1 );
+ else
+ print_newports((ipfw_insn_u16 *)cmd, 0,
+ O_TCPDATALEN);
+ break;
+
+ case O_TCPFLAGS:
+ print_flags("tcpflags", cmd, f_tcpflags);
+ break;
+
+ case O_TCPOPTS:
+ print_flags("tcpoptions", cmd, f_tcpopts);
+ break;
+
+ case O_TCPWIN:
+ printf(" tcpwin %d", ntohs(cmd->arg1));
+ break;
+
+ case O_TCPACK:
+ printf(" tcpack %d", ntohl(cmd32->d[0]));
+ break;
+
+ case O_TCPSEQ:
+ printf(" tcpseq %d", ntohl(cmd32->d[0]));
+ break;
+
+ case O_UID:
+ {
+ struct passwd *pwd = getpwuid(cmd32->d[0]);
+
+ if (pwd)
+ printf(" uid %s", pwd->pw_name);
+ else
+ printf(" uid %u", cmd32->d[0]);
+ }
+ break;
+
+ case O_GID:
+ {
+ struct group *grp = getgrgid(cmd32->d[0]);
+
+ if (grp)
+ printf(" gid %s", grp->gr_name);
+ else
+ printf(" gid %u", cmd32->d[0]);
+ }
+ break;
+
+ case O_JAIL:
+ printf(" jail %d", cmd32->d[0]);
+ break;
+
+ case O_VERREVPATH:
+ printf(" verrevpath");
+ break;
+
+ case O_VERSRCREACH:
+ printf(" versrcreach");
+ break;
+
+ case O_ANTISPOOF:
+ printf(" antispoof");
+ break;
+
+ case O_IPSEC:
+ printf(" ipsec");
+ break;
+
+ case O_NOP:
+ comment = (char *)(cmd + 1);
+ break;
+
+ case O_KEEP_STATE:
+ printf(" keep-state");
+ break;
+
+ case O_LIMIT: {
+ struct _s_x *p = limit_masks;
+ ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
+ uint8_t x = c->limit_mask;
+ char const *comma = " ";
+
+ printf(" limit");
+ for (; p->x != 0 ; p++)
+ if ((x & p->x) == p->x) {
+ x &= ~p->x;
+ printf("%s%s", comma, p->s);
+ comma = ",";
+ }
+ PRINT_UINT_ARG(" ", c->conn_limit);
+ break;
+ }
+
+ case O_IP6:
+ printf(" ip6");
+ break;
+
+ case O_IP4:
+ printf(" ip4");
+ break;
+
+ case O_ICMP6TYPE:
+ print_icmp6types((ipfw_insn_u32 *)cmd);
+ break;
+
+ case O_EXT_HDR:
+ print_ext6hdr( (ipfw_insn *) cmd );
+ break;
+
+ case O_TAGGED:
+ if (F_LEN(cmd) == 1)
+ PRINT_UINT_ARG(" tagged ", cmd->arg1);
+ else
+ print_newports((ipfw_insn_u16 *)cmd, 0,
+ O_TAGGED);
+ break;
+
+ default:
+ printf(" [opcode %d len %d]",
+ cmd->opcode, cmd->len);
+ }
+ }
+ if (cmd->len & F_OR) {
+ printf(" or");
+ or_block = 1;
+ } else if (or_block) {
+ printf(" }");
+ or_block = 0;
+ }
+ }
+ show_prerequisites(&flags, HAVE_IP, 0);
+ if (comment)
+ printf(" // %s", comment);
+ printf("\n");
+}
+
+static void
+show_dyn_ipfw(ipfw_dyn_rule *d, int pcwidth, int bcwidth)
+{
+ struct protoent *pe;
+ struct in_addr a;
+ uint16_t rulenum;
+ char buf[INET6_ADDRSTRLEN];
+
+ if (!co.do_expired) {
+ if (!d->expire && !(d->dyn_type == O_LIMIT_PARENT))
+ return;
+ }
+ bcopy(&d->rule, &rulenum, sizeof(rulenum));
+ printf("%05d", rulenum);
+ if (pcwidth>0 || bcwidth>0)
+ printf(" %*llu %*llu (%ds)", pcwidth,
+ align_uint64(&d->pcnt), bcwidth,
+ align_uint64(&d->bcnt), d->expire);
+ switch (d->dyn_type) {
+ case O_LIMIT_PARENT:
+ printf(" PARENT %d", d->count);
+ break;
+ case O_LIMIT:
+ printf(" LIMIT");
+ break;
+ case O_KEEP_STATE: /* bidir, no mask */
+ printf(" STATE");
+ break;
+ }
+
+ if ((pe = getprotobynumber(d->id.proto)) != NULL)
+ printf(" %s", pe->p_name);
+ else
+ printf(" proto %u", d->id.proto);
+
+ if (d->id.addr_type == 4) {
+ a.s_addr = htonl(d->id.src_ip);
+ printf(" %s %d", inet_ntoa(a), d->id.src_port);
+
+ a.s_addr = htonl(d->id.dst_ip);
+ printf(" <-> %s %d", inet_ntoa(a), d->id.dst_port);
+ } else if (d->id.addr_type == 6) {
+ printf(" %s %d", inet_ntop(AF_INET6, &d->id.src_ip6, buf,
+ sizeof(buf)), d->id.src_port);
+ printf(" <-> %s %d", inet_ntop(AF_INET6, &d->id.dst_ip6, buf,
+ sizeof(buf)), d->id.dst_port);
+ } else
+ printf(" UNKNOWN <-> UNKNOWN\n");
+
+ printf("\n");
+}
+
+/*
+ * This one handles all set-related commands
+ * ipfw set { show | enable | disable }
+ * ipfw set swap X Y
+ * ipfw set move X to Y
+ * ipfw set move rule X to Y
+ */
+void
+ipfw_sets_handler(int ac, char *av[])
+{
+ uint32_t set_disable, masks[2];
+ int i, nbytes;
+ uint16_t rulenum;
+ uint8_t cmd, new_set;
+
+ ac--;
+ av++;
+
+ if (!ac)
+ errx(EX_USAGE, "set needs command");
+ if (_substrcmp(*av, "show") == 0) {
+ void *data;
+ char const *msg;
+
+ nbytes = sizeof(struct ip_fw);
+ data = safe_calloc(1, nbytes);
+ if (do_cmd(IP_FW_GET, data, (uintptr_t)&nbytes) < 0)
+ err(EX_OSERR, "getsockopt(IP_FW_GET)");
+ bcopy(&((struct ip_fw *)data)->next_rule,
+ &set_disable, sizeof(set_disable));
+
+ for (i = 0, msg = "disable" ; i < RESVD_SET; i++)
+ if ((set_disable & (1<<i))) {
+ printf("%s %d", msg, i);
+ msg = "";
+ }
+ msg = (set_disable) ? " enable" : "enable";
+ for (i = 0; i < RESVD_SET; i++)
+ if (!(set_disable & (1<<i))) {
+ printf("%s %d", msg, i);
+ msg = "";
+ }
+ printf("\n");
+ } else if (_substrcmp(*av, "swap") == 0) {
+ ac--; av++;
+ if (ac != 2)
+ errx(EX_USAGE, "set swap needs 2 set numbers\n");
+ rulenum = atoi(av[0]);
+ new_set = atoi(av[1]);
+ if (!isdigit(*(av[0])) || rulenum > RESVD_SET)
+ errx(EX_DATAERR, "invalid set number %s\n", av[0]);
+ if (!isdigit(*(av[1])) || new_set > RESVD_SET)
+ errx(EX_DATAERR, "invalid set number %s\n", av[1]);
+ masks[0] = (4 << 24) | (new_set << 16) | (rulenum);
+ i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
+ } else if (_substrcmp(*av, "move") == 0) {
+ ac--; av++;
+ if (ac && _substrcmp(*av, "rule") == 0) {
+ cmd = 2;
+ ac--; av++;
+ } else
+ cmd = 3;
+ if (ac != 3 || _substrcmp(av[1], "to") != 0)
+ errx(EX_USAGE, "syntax: set move [rule] X to Y\n");
+ rulenum = atoi(av[0]);
+ new_set = atoi(av[2]);
+ if (!isdigit(*(av[0])) || (cmd == 3 && rulenum > RESVD_SET) ||
+ (cmd == 2 && rulenum == IPFW_DEFAULT_RULE) )
+ errx(EX_DATAERR, "invalid source number %s\n", av[0]);
+ if (!isdigit(*(av[2])) || new_set > RESVD_SET)
+ errx(EX_DATAERR, "invalid dest. set %s\n", av[1]);
+ masks[0] = (cmd << 24) | (new_set << 16) | (rulenum);
+ i = do_cmd(IP_FW_DEL, masks, sizeof(uint32_t));
+ } else if (_substrcmp(*av, "disable") == 0 ||
+ _substrcmp(*av, "enable") == 0 ) {
+ int which = _substrcmp(*av, "enable") == 0 ? 1 : 0;
+
+ ac--; av++;
+ masks[0] = masks[1] = 0;
+
+ while (ac) {
+ if (isdigit(**av)) {
+ i = atoi(*av);
+ if (i < 0 || i > RESVD_SET)
+ errx(EX_DATAERR,
+ "invalid set number %d\n", i);
+ masks[which] |= (1<<i);
+ } else if (_substrcmp(*av, "disable") == 0)
+ which = 0;
+ else if (_substrcmp(*av, "enable") == 0)
+ which = 1;
+ else
+ errx(EX_DATAERR,
+ "invalid set command %s\n", *av);
+ av++; ac--;
+ }
+ if ( (masks[0] & masks[1]) != 0 )
+ errx(EX_DATAERR,
+ "cannot enable and disable the same set\n");
+
+ i = do_cmd(IP_FW_DEL, masks, sizeof(masks));
+ if (i)
+ warn("set enable/disable: setsockopt(IP_FW_DEL)");
+ } else
+ errx(EX_USAGE, "invalid set command %s\n", *av);
+}
+
+void
+ipfw_sysctl_handler(int ac, char *av[], int which)
+{
+ ac--;
+ av++;
+
+ if (ac == 0) {
+ warnx("missing keyword to enable/disable\n");
+ } else if (_substrcmp(*av, "firewall") == 0) {
+ sysctlbyname("net.inet.ip.fw.enable", NULL, 0,
+ &which, sizeof(which));
+ } else if (_substrcmp(*av, "one_pass") == 0) {
+ sysctlbyname("net.inet.ip.fw.one_pass", NULL, 0,
+ &which, sizeof(which));
+ } else if (_substrcmp(*av, "debug") == 0) {
+ sysctlbyname("net.inet.ip.fw.debug", NULL, 0,
+ &which, sizeof(which));
+ } else if (_substrcmp(*av, "verbose") == 0) {
+ sysctlbyname("net.inet.ip.fw.verbose", NULL, 0,
+ &which, sizeof(which));
+ } else if (_substrcmp(*av, "dyn_keepalive") == 0) {
+ sysctlbyname("net.inet.ip.fw.dyn_keepalive", NULL, 0,
+ &which, sizeof(which));
+ } else if (_substrcmp(*av, "altq") == 0) {
+ altq_set_enabled(which);
+ } else {
+ warnx("unrecognize enable/disable keyword: %s\n", *av);
+ }
+}
+
+void
+ipfw_list(int ac, char *av[], int show_counters)
+{
+ struct ip_fw *r;
+ ipfw_dyn_rule *dynrules, *d;
+
+#define NEXT(r) ((struct ip_fw *)((char *)r + RULESIZE(r)))
+ char *lim;
+ void *data = NULL;
+ int bcwidth, n, nbytes, nstat, ndyn, pcwidth, width;
+ int exitval = EX_OK;
+ int lac;
+ char **lav;
+ u_long rnum, last;
+ char *endptr;
+ int seen = 0;
+ uint8_t set;
+
+ const int ocmd = co.do_pipe ? IP_DUMMYNET_GET : IP_FW_GET;
+ int nalloc = 1024; /* start somewhere... */
+
+ last = 0;
+
+ if (co.test_only) {
+ fprintf(stderr, "Testing only, list disabled\n");
+ return;
+ }
+
+ ac--;
+ av++;
+
+ /* get rules or pipes from kernel, resizing array as necessary */
+ nbytes = nalloc;
+
+ while (nbytes >= nalloc) {
+ nalloc = nalloc * 2 + 200;
+ nbytes = nalloc;
+ data = safe_realloc(data, nbytes);
+ if (do_cmd(ocmd, data, (uintptr_t)&nbytes) < 0)
+ err(EX_OSERR, "getsockopt(IP_%s_GET)",
+ co.do_pipe ? "DUMMYNET" : "FW");
+ }
+
+ if (co.do_pipe) {
+ ipfw_list_pipes(data, nbytes, ac, av);
+ goto done;
+ }
+
+ /*
+ * Count static rules. They have variable size so we
+ * need to scan the list to count them.
+ */
+ for (nstat = 1, r = data, lim = (char *)data + nbytes;
+ r->rulenum < IPFW_DEFAULT_RULE && (char *)r < lim;
+ ++nstat, r = NEXT(r) )
+ ; /* nothing */
+
+ /*
+ * Count dynamic rules. This is easier as they have
+ * fixed size.
+ */
+ r = NEXT(r);
+ dynrules = (ipfw_dyn_rule *)r ;
+ n = (char *)r - (char *)data;
+ ndyn = (nbytes - n) / sizeof *dynrules;
+
+ /* if showing stats, figure out column widths ahead of time */
+ bcwidth = pcwidth = 0;
+ if (show_counters) {
+ for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
+ /* skip rules from another set */
+ if (co.use_set && r->set != co.use_set - 1)
+ continue;
+
+ /* packet counter */
+ width = snprintf(NULL, 0, "%llu",
+ align_uint64(&r->pcnt));
+ if (width > pcwidth)
+ pcwidth = width;
+
+ /* byte counter */
+ width = snprintf(NULL, 0, "%llu",
+ align_uint64(&r->bcnt));
+ if (width > bcwidth)
+ bcwidth = width;
+ }
+ }
+ if (co.do_dynamic && ndyn) {
+ for (n = 0, d = dynrules; n < ndyn; n++, d++) {
+ if (co.use_set) {
+ /* skip rules from another set */
+ bcopy((char *)&d->rule + sizeof(uint16_t),
+ &set, sizeof(uint8_t));
+ if (set != co.use_set - 1)
+ continue;
+ }
+ width = snprintf(NULL, 0, "%llu",
+ align_uint64(&d->pcnt));
+ if (width > pcwidth)
+ pcwidth = width;
+
+ width = snprintf(NULL, 0, "%llu",
+ align_uint64(&d->bcnt));
+ if (width > bcwidth)
+ bcwidth = width;
+ }
+ }
+ /* if no rule numbers were specified, list all rules */
+ if (ac == 0) {
+ for (n = 0, r = data; n < nstat; n++, r = NEXT(r)) {
+ if (co.use_set && r->set != co.use_set - 1)
+ continue;
+ show_ipfw(r, pcwidth, bcwidth);
+ }
+
+ if (co.do_dynamic && ndyn) {
+ printf("## Dynamic rules (%d):\n", ndyn);
+ for (n = 0, d = dynrules; n < ndyn; n++, d++) {
+ if (co.use_set) {
+ bcopy((char *)&d->rule + sizeof(uint16_t),
+ &set, sizeof(uint8_t));
+ if (set != co.use_set - 1)
+ continue;
+ }
+ show_dyn_ipfw(d, pcwidth, bcwidth);
+ }
+ }
+ goto done;
+ }
+
+ /* display specific rules requested on command line */
+
+ for (lac = ac, lav = av; lac != 0; lac--) {
+ /* convert command line rule # */
+ last = rnum = strtoul(*lav++, &endptr, 10);
+ if (*endptr == '-')
+ last = strtoul(endptr+1, &endptr, 10);
+ if (*endptr) {
+ exitval = EX_USAGE;
+ warnx("invalid rule number: %s", *(lav - 1));
+ continue;
+ }
+ for (n = seen = 0, r = data; n < nstat; n++, r = NEXT(r) ) {
+ if (r->rulenum > last)
+ break;
+ if (co.use_set && r->set != co.use_set - 1)
+ continue;
+ if (r->rulenum >= rnum && r->rulenum <= last) {
+ show_ipfw(r, pcwidth, bcwidth);
+ seen = 1;
+ }
+ }
+ if (!seen) {
+ /* give precedence to other error(s) */
+ if (exitval == EX_OK)
+ exitval = EX_UNAVAILABLE;
+ warnx("rule %lu does not exist", rnum);
+ }
+ }
+
+ if (co.do_dynamic && ndyn) {
+ printf("## Dynamic rules:\n");
+ for (lac = ac, lav = av; lac != 0; lac--) {
+ last = rnum = strtoul(*lav++, &endptr, 10);
+ if (*endptr == '-')
+ last = strtoul(endptr+1, &endptr, 10);
+ if (*endptr)
+ /* already warned */
+ continue;
+ for (n = 0, d = dynrules; n < ndyn; n++, d++) {
+ uint16_t rulenum;
+
+ bcopy(&d->rule, &rulenum, sizeof(rulenum));
+ if (rulenum > rnum)
+ break;
+ if (co.use_set) {
+ bcopy((char *)&d->rule + sizeof(uint16_t),
+ &set, sizeof(uint8_t));
+ if (set != co.use_set - 1)
+ continue;
+ }
+ if (r->rulenum >= rnum && r->rulenum <= last)
+ show_dyn_ipfw(d, pcwidth, bcwidth);
+ }
+ }
+ }
+
+ ac = 0;
+
+done:
+ free(data);
+
+ if (exitval != EX_OK)
+ exit(exitval);
+#undef NEXT
+}
+
+static int
+lookup_host (char *host, struct in_addr *ipaddr)
+{
+ struct hostent *he;
+
+ if (!inet_aton(host, ipaddr)) {
+ if ((he = gethostbyname(host)) == NULL)
+ return(-1);
+ *ipaddr = *(struct in_addr *)he->h_addr_list[0];
+ }
+ return(0);
+}
+
+/*
+ * fills the addr and mask fields in the instruction as appropriate from av.
+ * Update length as appropriate.
+ * The following formats are allowed:
+ * me returns O_IP_*_ME
+ * 1.2.3.4 single IP address
+ * 1.2.3.4:5.6.7.8 address:mask
+ * 1.2.3.4/24 address/mask
+ * 1.2.3.4/26{1,6,5,4,23} set of addresses in a subnet
+ * We can have multiple comma-separated address/mask entries.
+ */
+static void
+fill_ip(ipfw_insn_ip *cmd, char *av)
+{
+ int len = 0;
+ uint32_t *d = ((ipfw_insn_u32 *)cmd)->d;
+
+ cmd->o.len &= ~F_LEN_MASK; /* zero len */
+
+ if (_substrcmp(av, "any") == 0)
+ return;
+
+ if (_substrcmp(av, "me") == 0) {
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn);
+ return;
+ }
+
+ if (strncmp(av, "table(", 6) == 0) {
+ char *p = strchr(av + 6, ',');
+
+ if (p)
+ *p++ = '\0';
+ cmd->o.opcode = O_IP_DST_LOOKUP;
+ cmd->o.arg1 = strtoul(av + 6, NULL, 0);
+ if (p) {
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
+ d[0] = strtoul(p, NULL, 0);
+ } else
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn);
+ return;
+ }
+
+ while (av) {
+ /*
+ * After the address we can have '/' or ':' indicating a mask,
+ * ',' indicating another address follows, '{' indicating a
+ * set of addresses of unspecified size.
+ */
+ char *t = NULL, *p = strpbrk(av, "/:,{");
+ int masklen;
+ char md, nd = '\0';
+
+ if (p) {
+ md = *p;
+ *p++ = '\0';
+ if ((t = strpbrk(p, ",{")) != NULL) {
+ nd = *t;
+ *t = '\0';
+ }
+ } else
+ md = '\0';
+
+ if (lookup_host(av, (struct in_addr *)&d[0]) != 0)
+ errx(EX_NOHOST, "hostname ``%s'' unknown", av);
+ switch (md) {
+ case ':':
+ if (!inet_aton(p, (struct in_addr *)&d[1]))
+ errx(EX_DATAERR, "bad netmask ``%s''", p);
+ break;
+ case '/':
+ masklen = atoi(p);
+ if (masklen == 0)
+ d[1] = htonl(0); /* mask */
+ else if (masklen > 32)
+ errx(EX_DATAERR, "bad width ``%s''", p);
+ else
+ d[1] = htonl(~0 << (32 - masklen));
+ break;
+ case '{': /* no mask, assume /24 and put back the '{' */
+ d[1] = htonl(~0 << (32 - 24));
+ *(--p) = md;
+ break;
+
+ case ',': /* single address plus continuation */
+ *(--p) = md;
+ /* FALLTHROUGH */
+ case 0: /* initialization value */
+ default:
+ d[1] = htonl(~0); /* force /32 */
+ break;
+ }
+ d[0] &= d[1]; /* mask base address with mask */
+ if (t)
+ *t = nd;
+ /* find next separator */
+ if (p)
+ p = strpbrk(p, ",{");
+ if (p && *p == '{') {
+ /*
+ * We have a set of addresses. They are stored as follows:
+ * arg1 is the set size (powers of 2, 2..256)
+ * addr is the base address IN HOST FORMAT
+ * mask.. is an array of arg1 bits (rounded up to
+ * the next multiple of 32) with bits set
+ * for each host in the map.
+ */
+ uint32_t *map = (uint32_t *)&cmd->mask;
+ int low, high;
+ int i = contigmask((uint8_t *)&(d[1]), 32);
+
+ if (len > 0)
+ errx(EX_DATAERR, "address set cannot be in a list");
+ if (i < 24 || i > 31)
+ errx(EX_DATAERR, "invalid set with mask %d\n", i);
+ cmd->o.arg1 = 1<<(32-i); /* map length */
+ d[0] = ntohl(d[0]); /* base addr in host format */
+ cmd->o.opcode = O_IP_DST_SET; /* default */
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32) + (cmd->o.arg1+31)/32;
+ for (i = 0; i < (cmd->o.arg1+31)/32 ; i++)
+ map[i] = 0; /* clear map */
+
+ av = p + 1;
+ low = d[0] & 0xff;
+ high = low + cmd->o.arg1 - 1;
+ /*
+ * Here, i stores the previous value when we specify a range
+ * of addresses within a mask, e.g. 45-63. i = -1 means we
+ * have no previous value.
+ */
+ i = -1; /* previous value in a range */
+ while (isdigit(*av)) {
+ char *s;
+ int a = strtol(av, &s, 0);
+
+ if (s == av) { /* no parameter */
+ if (*av != '}')
+ errx(EX_DATAERR, "set not closed\n");
+ if (i != -1)
+ errx(EX_DATAERR, "incomplete range %d-", i);
+ break;
+ }
+ if (a < low || a > high)
+ errx(EX_DATAERR, "addr %d out of range [%d-%d]\n",
+ a, low, high);
+ a -= low;
+ if (i == -1) /* no previous in range */
+ i = a;
+ else { /* check that range is valid */
+ if (i > a)
+ errx(EX_DATAERR, "invalid range %d-%d",
+ i+low, a+low);
+ if (*s == '-')
+ errx(EX_DATAERR, "double '-' in range");
+ }
+ for (; i <= a; i++)
+ map[i/32] |= 1<<(i & 31);
+ i = -1;
+ if (*s == '-')
+ i = a;
+ else if (*s == '}')
+ break;
+ av = s+1;
+ }
+ return;
+ }
+ av = p;
+ if (av) /* then *av must be a ',' */
+ av++;
+
+ /* Check this entry */
+ if (d[1] == 0) { /* "any", specified as x.x.x.x/0 */
+ /*
+ * 'any' turns the entire list into a NOP.
+ * 'not any' never matches, so it is removed from the
+ * list unless it is the only item, in which case we
+ * report an error.
+ */
+ if (cmd->o.len & F_NOT) { /* "not any" never matches */
+ if (av == NULL && len == 0) /* only this entry */
+ errx(EX_DATAERR, "not any never matches");
+ }
+ /* else do nothing and skip this entry */
+ return;
+ }
+ /* A single IP can be stored in an optimized format */
+ if (d[1] == ~0 && av == NULL && len == 0) {
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn_u32);
+ return;
+ }
+ len += 2; /* two words... */
+ d += 2;
+ } /* end while */
+ if (len + 1 > F_LEN_MASK)
+ errx(EX_DATAERR, "address list too long");
+ cmd->o.len |= len+1;
+}
+
+
+/* n2mask sets n bits of the mask */
+void
+n2mask(struct in6_addr *mask, int n)
+{
+ static int minimask[9] =
+ { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
+ u_char *p;
+
+ memset(mask, 0, sizeof(struct in6_addr));
+ p = (u_char *) mask;
+ for (; n > 0; p++, n -= 8) {
+ if (n >= 8)
+ *p = 0xff;
+ else
+ *p = minimask[n];
+ }
+ return;
+}
+
+
+/*
+ * helper function to process a set of flags and set bits in the
+ * appropriate masks.
+ */
+static void
+fill_flags(ipfw_insn *cmd, enum ipfw_opcodes opcode,
+ struct _s_x *flags, char *p)
+{
+ uint8_t set=0, clear=0;
+
+ while (p && *p) {
+ char *q; /* points to the separator */
+ int val;
+ uint8_t *which; /* mask we are working on */
+
+ if (*p == '!') {
+ p++;
+ which = &clear;
+ } else
+ which = &set;
+ q = strchr(p, ',');
+ if (q)
+ *q++ = '\0';
+ val = match_token(flags, p);
+ if (val <= 0)
+ errx(EX_DATAERR, "invalid flag %s", p);
+ *which |= (uint8_t)val;
+ p = q;
+ }
+ cmd->opcode = opcode;
+ cmd->len = (cmd->len & (F_NOT | F_OR)) | 1;
+ cmd->arg1 = (set & 0xff) | ( (clear & 0xff) << 8);
+}
+
+
+void
+ipfw_delete(int ac, char *av[])
+{
+ uint32_t rulenum;
+ int i;
+ int exitval = EX_OK;
+ int do_set = 0;
+
+
+ av++; ac--;
+ NEED1("missing rule specification");
+ if (ac > 0 && _substrcmp(*av, "set") == 0) {
+ /* Do not allow using the following syntax:
+ * ipfw set N delete set M
+ */
+ if (co.use_set)
+ errx(EX_DATAERR, "invalid syntax");
+ do_set = 1; /* delete set */
+ ac--; av++;
+ }
+
+ /* Rule number */
+ while (ac && isdigit(**av)) {
+ i = atoi(*av); av++; ac--;
+ if (co.do_nat) {
+ exitval = do_cmd(IP_FW_NAT_DEL, &i, sizeof i);
+ if (exitval) {
+ exitval = EX_UNAVAILABLE;
+ warn("rule %u not available", i);
+ }
+ } else if (co.do_pipe) {
+ exitval = ipfw_delete_pipe(co.do_pipe, i);
+ } else {
+ if (co.use_set)
+ rulenum = (i & 0xffff) | (5 << 24) |
+ ((co.use_set - 1) << 16);
+ else
+ rulenum = (i & 0xffff) | (do_set << 24);
+ i = do_cmd(IP_FW_DEL, &rulenum, sizeof rulenum);
+ if (i) {
+ exitval = EX_UNAVAILABLE;
+ warn("rule %u: setsockopt(IP_FW_DEL)",
+ rulenum);
+ }
+ }
+ }
+ if (exitval != EX_OK)
+ exit(exitval);
+}
+
+
+/*
+ * fill the interface structure. We do not check the name as we can
+ * create interfaces dynamically, so checking them at insert time
+ * makes relatively little sense.
+ * Interface names containing '*', '?', or '[' are assumed to be shell
+ * patterns which match interfaces.
+ */
+static void
+fill_iface(ipfw_insn_if *cmd, char *arg)
+{
+ cmd->name[0] = '\0';
+ cmd->o.len |= F_INSN_SIZE(ipfw_insn_if);
+
+ /* Parse the interface or address */
+ if (strcmp(arg, "any") == 0)
+ cmd->o.len = 0; /* effectively ignore this command */
+ else if (!isdigit(*arg)) {
+ strlcpy(cmd->name, arg, sizeof(cmd->name));
+ cmd->p.glob = strpbrk(arg, "*?[") != NULL ? 1 : 0;
+ } else if (!inet_aton(arg, &cmd->p.ip))
+ errx(EX_DATAERR, "bad ip address ``%s''", arg);
+}
+
+static void
+get_mac_addr_mask(const char *p, uint8_t *addr, uint8_t *mask)
+{
+ int i, l;
+ char *ap, *ptr, *optr;
+ struct ether_addr *mac;
+ const char *macset = "0123456789abcdefABCDEF:";
+
+ if (strcmp(p, "any") == 0) {
+ for (i = 0; i < ETHER_ADDR_LEN; i++)
+ addr[i] = mask[i] = 0;
+ return;
+ }
+
+ optr = ptr = strdup(p);
+ if ((ap = strsep(&ptr, "&/")) != NULL && *ap != 0) {
+ l = strlen(ap);
+ if (strspn(ap, macset) != l || (mac = ether_aton(ap)) == NULL)
+ errx(EX_DATAERR, "Incorrect MAC address");
+ bcopy(mac, addr, ETHER_ADDR_LEN);
+ } else
+ errx(EX_DATAERR, "Incorrect MAC address");
+
+ if (ptr != NULL) { /* we have mask? */
+ if (p[ptr - optr - 1] == '/') { /* mask len */
+ l = strtol(ptr, &ap, 10);
+ if (*ap != 0 || l > ETHER_ADDR_LEN * 8 || l < 0)
+ errx(EX_DATAERR, "Incorrect mask length");
+ for (i = 0; l > 0 && i < ETHER_ADDR_LEN; l -= 8, i++)
+ mask[i] = (l >= 8) ? 0xff: (~0) << (8 - l);
+ } else { /* mask */
+ l = strlen(ptr);
+ if (strspn(ptr, macset) != l ||
+ (mac = ether_aton(ptr)) == NULL)
+ errx(EX_DATAERR, "Incorrect mask");
+ bcopy(mac, mask, ETHER_ADDR_LEN);
+ }
+ } else { /* default mask: ff:ff:ff:ff:ff:ff */
+ for (i = 0; i < ETHER_ADDR_LEN; i++)
+ mask[i] = 0xff;
+ }
+ for (i = 0; i < ETHER_ADDR_LEN; i++)
+ addr[i] &= mask[i];
+
+ free(optr);
+}
+
+/*
+ * helper function, updates the pointer to cmd with the length
+ * of the current command, and also cleans up the first word of
+ * the new command in case it has been clobbered before.
+ */
+static ipfw_insn *
+next_cmd(ipfw_insn *cmd)
+{
+ cmd += F_LEN(cmd);
+ bzero(cmd, sizeof(*cmd));
+ return cmd;
+}
+
+/*
+ * Takes arguments and copies them into a comment
+ */
+static void
+fill_comment(ipfw_insn *cmd, int ac, char **av)
+{
+ int i, l;
+ char *p = (char *)(cmd + 1);
+
+ cmd->opcode = O_NOP;
+ cmd->len = (cmd->len & (F_NOT | F_OR));
+
+ /* Compute length of comment string. */
+ for (i = 0, l = 0; i < ac; i++)
+ l += strlen(av[i]) + 1;
+ if (l == 0)
+ return;
+ if (l > 84)
+ errx(EX_DATAERR,
+ "comment too long (max 80 chars)");
+ l = 1 + (l+3)/4;
+ cmd->len = (cmd->len & (F_NOT | F_OR)) | l;
+ for (i = 0; i < ac; i++) {
+ strcpy(p, av[i]);
+ p += strlen(av[i]);
+ *p++ = ' ';
+ }
+ *(--p) = '\0';
+}
+
+/*
+ * A function to fill simple commands of size 1.
+ * Existing flags are preserved.
+ */
+static void
+fill_cmd(ipfw_insn *cmd, enum ipfw_opcodes opcode, int flags, uint16_t arg)
+{
+ cmd->opcode = opcode;
+ cmd->len = ((cmd->len | flags) & (F_NOT | F_OR)) | 1;
+ cmd->arg1 = arg;
+}
+
+/*
+ * Fetch and add the MAC address and type, with masks. This generates one or
+ * two microinstructions, and returns the pointer to the last one.
+ */
+static ipfw_insn *
+add_mac(ipfw_insn *cmd, int ac, char *av[])
+{
+ ipfw_insn_mac *mac;
+
+ if (ac < 2)
+ errx(EX_DATAERR, "MAC dst src");
+
+ cmd->opcode = O_MACADDR2;
+ cmd->len = (cmd->len & (F_NOT | F_OR)) | F_INSN_SIZE(ipfw_insn_mac);
+
+ mac = (ipfw_insn_mac *)cmd;
+ get_mac_addr_mask(av[0], mac->addr, mac->mask); /* dst */
+ get_mac_addr_mask(av[1], &(mac->addr[ETHER_ADDR_LEN]),
+ &(mac->mask[ETHER_ADDR_LEN])); /* src */
+ return cmd;
+}
+
+static ipfw_insn *
+add_mactype(ipfw_insn *cmd, int ac, char *av)
+{
+ if (ac < 1)
+ errx(EX_DATAERR, "missing MAC type");
+ if (strcmp(av, "any") != 0) { /* we have a non-null type */
+ fill_newports((ipfw_insn_u16 *)cmd, av, IPPROTO_ETHERTYPE);
+ cmd->opcode = O_MAC_TYPE;
+ return cmd;
+ } else
+ return NULL;
+}
+
+static ipfw_insn *
+add_proto0(ipfw_insn *cmd, char *av, u_char *protop)
+{
+ struct protoent *pe;
+ char *ep;
+ int proto;
+
+ proto = strtol(av, &ep, 10);
+ if (*ep != '\0' || proto <= 0) {
+ if ((pe = getprotobyname(av)) == NULL)
+ return NULL;
+ proto = pe->p_proto;
+ }
+
+ fill_cmd(cmd, O_PROTO, 0, proto);
+ *protop = proto;
+ return cmd;
+}
+
+static ipfw_insn *
+add_proto(ipfw_insn *cmd, char *av, u_char *protop)
+{
+ u_char proto = IPPROTO_IP;
+
+ if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
+ ; /* do not set O_IP4 nor O_IP6 */
+ else if (strcmp(av, "ip4") == 0)
+ /* explicit "just IPv4" rule */
+ fill_cmd(cmd, O_IP4, 0, 0);
+ else if (strcmp(av, "ip6") == 0) {
+ /* explicit "just IPv6" rule */
+ proto = IPPROTO_IPV6;
+ fill_cmd(cmd, O_IP6, 0, 0);
+ } else
+ return add_proto0(cmd, av, protop);
+
+ *protop = proto;
+ return cmd;
+}
+
+static ipfw_insn *
+add_proto_compat(ipfw_insn *cmd, char *av, u_char *protop)
+{
+ u_char proto = IPPROTO_IP;
+
+ if (_substrcmp(av, "all") == 0 || strcmp(av, "ip") == 0)
+ ; /* do not set O_IP4 nor O_IP6 */
+ else if (strcmp(av, "ipv4") == 0 || strcmp(av, "ip4") == 0)
+ /* explicit "just IPv4" rule */
+ fill_cmd(cmd, O_IP4, 0, 0);
+ else if (strcmp(av, "ipv6") == 0 || strcmp(av, "ip6") == 0) {
+ /* explicit "just IPv6" rule */
+ proto = IPPROTO_IPV6;
+ fill_cmd(cmd, O_IP6, 0, 0);
+ } else
+ return add_proto0(cmd, av, protop);
+
+ *protop = proto;
+ return cmd;
+}
+
+static ipfw_insn *
+add_srcip(ipfw_insn *cmd, char *av)
+{
+ fill_ip((ipfw_insn_ip *)cmd, av);
+ if (cmd->opcode == O_IP_DST_SET) /* set */
+ cmd->opcode = O_IP_SRC_SET;
+ else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
+ cmd->opcode = O_IP_SRC_LOOKUP;
+ else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
+ cmd->opcode = O_IP_SRC_ME;
+ else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
+ cmd->opcode = O_IP_SRC;
+ else /* addr/mask */
+ cmd->opcode = O_IP_SRC_MASK;
+ return cmd;
+}
+
+static ipfw_insn *
+add_dstip(ipfw_insn *cmd, char *av)
+{
+ fill_ip((ipfw_insn_ip *)cmd, av);
+ if (cmd->opcode == O_IP_DST_SET) /* set */
+ ;
+ else if (cmd->opcode == O_IP_DST_LOOKUP) /* table */
+ ;
+ else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn)) /* me */
+ cmd->opcode = O_IP_DST_ME;
+ else if (F_LEN(cmd) == F_INSN_SIZE(ipfw_insn_u32)) /* one IP */
+ cmd->opcode = O_IP_DST;
+ else /* addr/mask */
+ cmd->opcode = O_IP_DST_MASK;
+ return cmd;
+}
+
+static ipfw_insn *
+add_ports(ipfw_insn *cmd, char *av, u_char proto, int opcode)
+{
+ if (_substrcmp(av, "any") == 0) {
+ return NULL;
+ } else if (fill_newports((ipfw_insn_u16 *)cmd, av, proto)) {
+ /* XXX todo: check that we have a protocol with ports */
+ cmd->opcode = opcode;
+ return cmd;
+ }
+ return NULL;
+}
+
+static ipfw_insn *
+add_src(ipfw_insn *cmd, char *av, u_char proto)
+{
+ struct in6_addr a;
+ char *host, *ch;
+ ipfw_insn *ret = NULL;
+
+ if ((host = strdup(av)) == NULL)
+ return NULL;
+ if ((ch = strrchr(host, '/')) != NULL)
+ *ch = '\0';
+
+ if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
+ inet_pton(AF_INET6, host, &a))
+ ret = add_srcip6(cmd, av);
+ /* XXX: should check for IPv4, not !IPv6 */
+ if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
+ !inet_pton(AF_INET6, host, &a)))
+ ret = add_srcip(cmd, av);
+ if (ret == NULL && strcmp(av, "any") != 0)
+ ret = cmd;
+
+ free(host);
+ return ret;
+}
+
+static ipfw_insn *
+add_dst(ipfw_insn *cmd, char *av, u_char proto)
+{
+ struct in6_addr a;
+ char *host, *ch;
+ ipfw_insn *ret = NULL;
+
+ if ((host = strdup(av)) == NULL)
+ return NULL;
+ if ((ch = strrchr(host, '/')) != NULL)
+ *ch = '\0';
+
+ if (proto == IPPROTO_IPV6 || strcmp(av, "me6") == 0 ||
+ inet_pton(AF_INET6, host, &a))
+ ret = add_dstip6(cmd, av);
+ /* XXX: should check for IPv4, not !IPv6 */
+ if (ret == NULL && (proto == IPPROTO_IP || strcmp(av, "me") == 0 ||
+ !inet_pton(AF_INET6, host, &a)))
+ ret = add_dstip(cmd, av);
+ if (ret == NULL && strcmp(av, "any") != 0)
+ ret = cmd;
+
+ free(host);
+ return ret;
+}
+
+/*
+ * Parse arguments and assemble the microinstructions which make up a rule.
+ * Rules are added into the 'rulebuf' and then copied in the correct order
+ * into the actual rule.
+ *
+ * The syntax for a rule starts with the action, followed by
+ * optional action parameters, and the various match patterns.
+ * In the assembled microcode, the first opcode must be an O_PROBE_STATE
+ * (generated if the rule includes a keep-state option), then the
+ * various match patterns, log/altq actions, and the actual action.
+ *
+ */
+void
+ipfw_add(int ac, char *av[])
+{
+ /*
+ * rules are added into the 'rulebuf' and then copied in
+ * the correct order into the actual rule.
+ * Some things that need to go out of order (prob, action etc.)
+ * go into actbuf[].
+ */
+ static uint32_t rulebuf[255], actbuf[255], cmdbuf[255];
+
+ ipfw_insn *src, *dst, *cmd, *action, *prev=NULL;
+ ipfw_insn *first_cmd; /* first match pattern */
+
+ struct ip_fw *rule;
+
+ /*
+ * various flags used to record that we entered some fields.
+ */
+ ipfw_insn *have_state = NULL; /* check-state or keep-state */
+ ipfw_insn *have_log = NULL, *have_altq = NULL, *have_tag = NULL;
+ size_t len;
+
+ int i;
+
+ int open_par = 0; /* open parenthesis ( */
+
+ /* proto is here because it is used to fetch ports */
+ u_char proto = IPPROTO_IP; /* default protocol */
+
+ double match_prob = 1; /* match probability, default is always match */
+
+ bzero(actbuf, sizeof(actbuf)); /* actions go here */
+ bzero(cmdbuf, sizeof(cmdbuf));
+ bzero(rulebuf, sizeof(rulebuf));
+
+ rule = (struct ip_fw *)rulebuf;
+ cmd = (ipfw_insn *)cmdbuf;
+ action = (ipfw_insn *)actbuf;
+
+ av++; ac--;
+
+ /* [rule N] -- Rule number optional */
+ if (ac && isdigit(**av)) {
+ rule->rulenum = atoi(*av);
+ av++;
+ ac--;
+ }
+
+ /* [set N] -- set number (0..RESVD_SET), optional */
+ if (ac > 1 && _substrcmp(*av, "set") == 0) {
+ int set = strtoul(av[1], NULL, 10);
+ if (set < 0 || set > RESVD_SET)
+ errx(EX_DATAERR, "illegal set %s", av[1]);
+ rule->set = set;
+ av += 2; ac -= 2;
+ }
+
+ /* [prob D] -- match probability, optional */
+ if (ac > 1 && _substrcmp(*av, "prob") == 0) {
+ match_prob = strtod(av[1], NULL);
+
+ if (match_prob <= 0 || match_prob > 1)
+ errx(EX_DATAERR, "illegal match prob. %s", av[1]);
+ av += 2; ac -= 2;
+ }
+
+ /* action -- mandatory */
+ NEED1("missing action");
+ i = match_token(rule_actions, *av);
+ ac--; av++;
+ action->len = 1; /* default */
+ switch(i) {
+ case TOK_CHECKSTATE:
+ have_state = action;
+ action->opcode = O_CHECK_STATE;
+ break;
+
+ case TOK_ACCEPT:
+ action->opcode = O_ACCEPT;
+ break;
+
+ case TOK_DENY:
+ action->opcode = O_DENY;
+ action->arg1 = 0;
+ break;
+
+ case TOK_REJECT:
+ action->opcode = O_REJECT;
+ action->arg1 = ICMP_UNREACH_HOST;
+ break;
+
+ case TOK_RESET:
+ action->opcode = O_REJECT;
+ action->arg1 = ICMP_REJECT_RST;
+ break;
+
+ case TOK_RESET6:
+ action->opcode = O_UNREACH6;
+ action->arg1 = ICMP6_UNREACH_RST;
+ break;
+
+ case TOK_UNREACH:
+ action->opcode = O_REJECT;
+ NEED1("missing reject code");
+ fill_reject_code(&action->arg1, *av);
+ ac--; av++;
+ break;
+
+ case TOK_UNREACH6:
+ action->opcode = O_UNREACH6;
+ NEED1("missing unreach code");
+ fill_unreach6_code(&action->arg1, *av);
+ ac--; av++;
+ break;
+
+ case TOK_COUNT:
+ action->opcode = O_COUNT;
+ break;
+
+ case TOK_NAT:
+ action->opcode = O_NAT;
+ action->len = F_INSN_SIZE(ipfw_insn_nat);
+ goto chkarg;
+
+ case TOK_QUEUE:
+ action->opcode = O_QUEUE;
+ goto chkarg;
+ case TOK_PIPE:
+ action->opcode = O_PIPE;
+ goto chkarg;
+ case TOK_SKIPTO:
+ action->opcode = O_SKIPTO;
+ goto chkarg;
+ case TOK_NETGRAPH:
+ action->opcode = O_NETGRAPH;
+ goto chkarg;
+ case TOK_NGTEE:
+ action->opcode = O_NGTEE;
+ goto chkarg;
+ case TOK_DIVERT:
+ action->opcode = O_DIVERT;
+ goto chkarg;
+ case TOK_TEE:
+ action->opcode = O_TEE;
+chkarg:
+ if (!ac)
+ errx(EX_USAGE, "missing argument for %s", *(av - 1));
+ if (isdigit(**av)) {
+ action->arg1 = strtoul(*av, NULL, 10);
+ if (action->arg1 <= 0 || action->arg1 >= IP_FW_TABLEARG)
+ errx(EX_DATAERR, "illegal argument for %s",
+ *(av - 1));
+ } else if (_substrcmp(*av, "tablearg") == 0) {
+ action->arg1 = IP_FW_TABLEARG;
+ } else if (i == TOK_DIVERT || i == TOK_TEE) {
+ struct servent *s;
+ setservent(1);
+ s = getservbyname(av[0], "divert");
+ if (s != NULL)
+ action->arg1 = ntohs(s->s_port);
+ else
+ errx(EX_DATAERR, "illegal divert/tee port");
+ } else
+ errx(EX_DATAERR, "illegal argument for %s", *(av - 1));
+ ac--; av++;
+ break;
+
+ case TOK_FORWARD: {
+ ipfw_insn_sa *p = (ipfw_insn_sa *)action;
+ char *s, *end;
+
+ NEED1("missing forward address[:port]");
+
+ action->opcode = O_FORWARD_IP;
+ action->len = F_INSN_SIZE(ipfw_insn_sa);
+
+ /*
+ * In the kernel we assume AF_INET and use only
+ * sin_port and sin_addr.
+ */
+ p->sa.sin_family = AF_INET;
+ p->sa.sin_port = 0;
+ /*
+ * locate the address-port separator (':' or ',')
+ */
+ s = strchr(*av, ':');
+ if (s == NULL)
+ s = strchr(*av, ',');
+ if (s != NULL) {
+ *(s++) = '\0';
+ i = strtoport(s, &end, 0 /* base */, 0 /* proto */);
+ if (s == end)
+ errx(EX_DATAERR,
+ "illegal forwarding port ``%s''", s);
+ p->sa.sin_port = (u_short)i;
+ }
+ if (_substrcmp(*av, "tablearg") == 0)
+ p->sa.sin_addr.s_addr = INADDR_ANY;
+ else
+ lookup_host(*av, &(p->sa.sin_addr));
+ ac--; av++;
+ break;
+ }
+ case TOK_COMMENT:
+ /* pretend it is a 'count' rule followed by the comment */
+ action->opcode = O_COUNT;
+ ac++; av--; /* go back... */
+ break;
+
+ case TOK_SETFIB:
+ {
+ int numfibs;
+ size_t intsize = sizeof(int);
+
+ action->opcode = O_SETFIB;
+ NEED1("missing fib number");
+ action->arg1 = strtoul(*av, NULL, 10);
+ if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
+ errx(EX_DATAERR, "fibs not suported.\n");
+ if (action->arg1 >= numfibs) /* Temporary */
+ errx(EX_DATAERR, "fib too large.\n");
+ ac--; av++;
+ break;
+ }
+
+ case TOK_REASS:
+ action->opcode = O_REASS;
+ break;
+
+ default:
+ errx(EX_DATAERR, "invalid action %s\n", av[-1]);
+ }
+ action = next_cmd(action);
+
+ /*
+ * [altq queuename] -- altq tag, optional
+ * [log [logamount N]] -- log, optional
+ *
+ * If they exist, it go first in the cmdbuf, but then it is
+ * skipped in the copy section to the end of the buffer.
+ */
+ while (ac != 0 && (i = match_token(rule_action_params, *av)) != -1) {
+ ac--; av++;
+ switch (i) {
+ case TOK_LOG:
+ {
+ ipfw_insn_log *c = (ipfw_insn_log *)cmd;
+ int l;
+
+ if (have_log)
+ errx(EX_DATAERR,
+ "log cannot be specified more than once");
+ have_log = (ipfw_insn *)c;
+ cmd->len = F_INSN_SIZE(ipfw_insn_log);
+ cmd->opcode = O_LOG;
+ if (ac && _substrcmp(*av, "logamount") == 0) {
+ ac--; av++;
+ NEED1("logamount requires argument");
+ l = atoi(*av);
+ if (l < 0)
+ errx(EX_DATAERR,
+ "logamount must be positive");
+ c->max_log = l;
+ ac--; av++;
+ } else {
+ len = sizeof(c->max_log);
+ if (sysctlbyname("net.inet.ip.fw.verbose_limit",
+ &c->max_log, &len, NULL, 0) == -1)
+ errx(1, "sysctlbyname(\"%s\")",
+ "net.inet.ip.fw.verbose_limit");
+ }
+ }
+ break;
+
+ case TOK_ALTQ:
+ {
+ ipfw_insn_altq *a = (ipfw_insn_altq *)cmd;
+
+ NEED1("missing altq queue name");
+ if (have_altq)
+ errx(EX_DATAERR,
+ "altq cannot be specified more than once");
+ have_altq = (ipfw_insn *)a;
+ cmd->len = F_INSN_SIZE(ipfw_insn_altq);
+ cmd->opcode = O_ALTQ;
+ a->qid = altq_name_to_qid(*av);
+ ac--; av++;
+ }
+ break;
+
+ case TOK_TAG:
+ case TOK_UNTAG: {
+ uint16_t tag;
+
+ if (have_tag)
+ errx(EX_USAGE, "tag and untag cannot be "
+ "specified more than once");
+ GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1, i,
+ rule_action_params);
+ have_tag = cmd;
+ fill_cmd(cmd, O_TAG, (i == TOK_TAG) ? 0: F_NOT, tag);
+ ac--; av++;
+ break;
+ }
+
+ default:
+ abort();
+ }
+ cmd = next_cmd(cmd);
+ }
+
+ if (have_state) /* must be a check-state, we are done */
+ goto done;
+
+#define OR_START(target) \
+ if (ac && (*av[0] == '(' || *av[0] == '{')) { \
+ if (open_par) \
+ errx(EX_USAGE, "nested \"(\" not allowed\n"); \
+ prev = NULL; \
+ open_par = 1; \
+ if ( (av[0])[1] == '\0') { \
+ ac--; av++; \
+ } else \
+ (*av)++; \
+ } \
+ target: \
+
+
+#define CLOSE_PAR \
+ if (open_par) { \
+ if (ac && ( \
+ strcmp(*av, ")") == 0 || \
+ strcmp(*av, "}") == 0)) { \
+ prev = NULL; \
+ open_par = 0; \
+ ac--; av++; \
+ } else \
+ errx(EX_USAGE, "missing \")\"\n"); \
+ }
+
+#define NOT_BLOCK \
+ if (ac && _substrcmp(*av, "not") == 0) { \
+ if (cmd->len & F_NOT) \
+ errx(EX_USAGE, "double \"not\" not allowed\n"); \
+ cmd->len |= F_NOT; \
+ ac--; av++; \
+ }
+
+#define OR_BLOCK(target) \
+ if (ac && _substrcmp(*av, "or") == 0) { \
+ if (prev == NULL || open_par == 0) \
+ errx(EX_DATAERR, "invalid OR block"); \
+ prev->len |= F_OR; \
+ ac--; av++; \
+ goto target; \
+ } \
+ CLOSE_PAR;
+
+ first_cmd = cmd;
+
+#if 0
+ /*
+ * MAC addresses, optional.
+ * If we have this, we skip the part "proto from src to dst"
+ * and jump straight to the option parsing.
+ */
+ NOT_BLOCK;
+ NEED1("missing protocol");
+ if (_substrcmp(*av, "MAC") == 0 ||
+ _substrcmp(*av, "mac") == 0) {
+ ac--; av++; /* the "MAC" keyword */
+ add_mac(cmd, ac, av); /* exits in case of errors */
+ cmd = next_cmd(cmd);
+ ac -= 2; av += 2; /* dst-mac and src-mac */
+ NOT_BLOCK;
+ NEED1("missing mac type");
+ if (add_mactype(cmd, ac, av[0]))
+ cmd = next_cmd(cmd);
+ ac--; av++; /* any or mac-type */
+ goto read_options;
+ }
+#endif
+
+ /*
+ * protocol, mandatory
+ */
+ OR_START(get_proto);
+ NOT_BLOCK;
+ NEED1("missing protocol");
+ if (add_proto_compat(cmd, *av, &proto)) {
+ av++; ac--;
+ if (F_LEN(cmd) != 0) {
+ prev = cmd;
+ cmd = next_cmd(cmd);
+ }
+ } else if (first_cmd != cmd) {
+ errx(EX_DATAERR, "invalid protocol ``%s''", *av);
+ } else
+ goto read_options;
+ OR_BLOCK(get_proto);
+
+ /*
+ * "from", mandatory
+ */
+ if (!ac || _substrcmp(*av, "from") != 0)
+ errx(EX_USAGE, "missing ``from''");
+ ac--; av++;
+
+ /*
+ * source IP, mandatory
+ */
+ OR_START(source_ip);
+ NOT_BLOCK; /* optional "not" */
+ NEED1("missing source address");
+ if (add_src(cmd, *av, proto)) {
+ ac--; av++;
+ if (F_LEN(cmd) != 0) { /* ! any */
+ prev = cmd;
+ cmd = next_cmd(cmd);
+ }
+ } else
+ errx(EX_USAGE, "bad source address %s", *av);
+ OR_BLOCK(source_ip);
+
+ /*
+ * source ports, optional
+ */
+ NOT_BLOCK; /* optional "not" */
+ if (ac) {
+ if (_substrcmp(*av, "any") == 0 ||
+ add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
+ ac--; av++;
+ if (F_LEN(cmd) != 0)
+ cmd = next_cmd(cmd);
+ }
+ }
+
+ /*
+ * "to", mandatory
+ */
+ if (!ac || _substrcmp(*av, "to") != 0)
+ errx(EX_USAGE, "missing ``to''");
+ av++; ac--;
+
+ /*
+ * destination, mandatory
+ */
+ OR_START(dest_ip);
+ NOT_BLOCK; /* optional "not" */
+ NEED1("missing dst address");
+ if (add_dst(cmd, *av, proto)) {
+ ac--; av++;
+ if (F_LEN(cmd) != 0) { /* ! any */
+ prev = cmd;
+ cmd = next_cmd(cmd);
+ }
+ } else
+ errx( EX_USAGE, "bad destination address %s", *av);
+ OR_BLOCK(dest_ip);
+
+ /*
+ * dest. ports, optional
+ */
+ NOT_BLOCK; /* optional "not" */
+ if (ac) {
+ if (_substrcmp(*av, "any") == 0 ||
+ add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
+ ac--; av++;
+ if (F_LEN(cmd) != 0)
+ cmd = next_cmd(cmd);
+ }
+ }
+
+read_options:
+ if (ac && first_cmd == cmd) {
+ /*
+ * nothing specified so far, store in the rule to ease
+ * printout later.
+ */
+ rule->_pad = 1;
+ }
+ prev = NULL;
+ while (ac) {
+ char *s;
+ ipfw_insn_u32 *cmd32; /* alias for cmd */
+
+ s = *av;
+ cmd32 = (ipfw_insn_u32 *)cmd;
+
+ if (*s == '!') { /* alternate syntax for NOT */
+ if (cmd->len & F_NOT)
+ errx(EX_USAGE, "double \"not\" not allowed\n");
+ cmd->len = F_NOT;
+ s++;
+ }
+ i = match_token(rule_options, s);
+ ac--; av++;
+ switch(i) {
+ case TOK_NOT:
+ if (cmd->len & F_NOT)
+ errx(EX_USAGE, "double \"not\" not allowed\n");
+ cmd->len = F_NOT;
+ break;
+
+ case TOK_OR:
+ if (open_par == 0 || prev == NULL)
+ errx(EX_USAGE, "invalid \"or\" block\n");
+ prev->len |= F_OR;
+ break;
+
+ case TOK_STARTBRACE:
+ if (open_par)
+ errx(EX_USAGE, "+nested \"(\" not allowed\n");
+ open_par = 1;
+ break;
+
+ case TOK_ENDBRACE:
+ if (!open_par)
+ errx(EX_USAGE, "+missing \")\"\n");
+ open_par = 0;
+ prev = NULL;
+ break;
+
+ case TOK_IN:
+ fill_cmd(cmd, O_IN, 0, 0);
+ break;
+
+ case TOK_OUT:
+ cmd->len ^= F_NOT; /* toggle F_NOT */
+ fill_cmd(cmd, O_IN, 0, 0);
+ break;
+
+ case TOK_DIVERTED:
+ fill_cmd(cmd, O_DIVERTED, 0, 3);
+ break;
+
+ case TOK_DIVERTEDLOOPBACK:
+ fill_cmd(cmd, O_DIVERTED, 0, 1);
+ break;
+
+ case TOK_DIVERTEDOUTPUT:
+ fill_cmd(cmd, O_DIVERTED, 0, 2);
+ break;
+
+ case TOK_FRAG:
+ fill_cmd(cmd, O_FRAG, 0, 0);
+ break;
+
+ case TOK_LAYER2:
+ fill_cmd(cmd, O_LAYER2, 0, 0);
+ break;
+
+ case TOK_XMIT:
+ case TOK_RECV:
+ case TOK_VIA:
+ NEED1("recv, xmit, via require interface name"
+ " or address");
+ fill_iface((ipfw_insn_if *)cmd, av[0]);
+ ac--; av++;
+ if (F_LEN(cmd) == 0) /* not a valid address */
+ break;
+ if (i == TOK_XMIT)
+ cmd->opcode = O_XMIT;
+ else if (i == TOK_RECV)
+ cmd->opcode = O_RECV;
+ else if (i == TOK_VIA)
+ cmd->opcode = O_VIA;
+ break;
+
+ case TOK_ICMPTYPES:
+ NEED1("icmptypes requires list of types");
+ fill_icmptypes((ipfw_insn_u32 *)cmd, *av);
+ av++; ac--;
+ break;
+
+ case TOK_ICMP6TYPES:
+ NEED1("icmptypes requires list of types");
+ fill_icmp6types((ipfw_insn_icmp6 *)cmd, *av);
+ av++; ac--;
+ break;
+
+ case TOK_IPTTL:
+ NEED1("ipttl requires TTL");
+ if (strpbrk(*av, "-,")) {
+ if (!add_ports(cmd, *av, 0, O_IPTTL))
+ errx(EX_DATAERR, "invalid ipttl %s", *av);
+ } else
+ fill_cmd(cmd, O_IPTTL, 0, strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ case TOK_IPID:
+ NEED1("ipid requires id");
+ if (strpbrk(*av, "-,")) {
+ if (!add_ports(cmd, *av, 0, O_IPID))
+ errx(EX_DATAERR, "invalid ipid %s", *av);
+ } else
+ fill_cmd(cmd, O_IPID, 0, strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ case TOK_IPLEN:
+ NEED1("iplen requires length");
+ if (strpbrk(*av, "-,")) {
+ if (!add_ports(cmd, *av, 0, O_IPLEN))
+ errx(EX_DATAERR, "invalid ip len %s", *av);
+ } else
+ fill_cmd(cmd, O_IPLEN, 0, strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ case TOK_IPVER:
+ NEED1("ipver requires version");
+ fill_cmd(cmd, O_IPVER, 0, strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ case TOK_IPPRECEDENCE:
+ NEED1("ipprecedence requires value");
+ fill_cmd(cmd, O_IPPRECEDENCE, 0,
+ (strtoul(*av, NULL, 0) & 7) << 5);
+ ac--; av++;
+ break;
+
+ case TOK_IPOPTS:
+ NEED1("missing argument for ipoptions");
+ fill_flags(cmd, O_IPOPT, f_ipopts, *av);
+ ac--; av++;
+ break;
+
+ case TOK_IPTOS:
+ NEED1("missing argument for iptos");
+ fill_flags(cmd, O_IPTOS, f_iptos, *av);
+ ac--; av++;
+ break;
+
+ case TOK_UID:
+ NEED1("uid requires argument");
+ {
+ char *end;
+ uid_t uid;
+ struct passwd *pwd;
+
+ cmd->opcode = O_UID;
+ uid = strtoul(*av, &end, 0);
+ pwd = (*end == '\0') ? getpwuid(uid) : getpwnam(*av);
+ if (pwd == NULL)
+ errx(EX_DATAERR, "uid \"%s\" nonexistent", *av);
+ cmd32->d[0] = pwd->pw_uid;
+ cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
+ ac--; av++;
+ }
+ break;
+
+ case TOK_GID:
+ NEED1("gid requires argument");
+ {
+ char *end;
+ gid_t gid;
+ struct group *grp;
+
+ cmd->opcode = O_GID;
+ gid = strtoul(*av, &end, 0);
+ grp = (*end == '\0') ? getgrgid(gid) : getgrnam(*av);
+ if (grp == NULL)
+ errx(EX_DATAERR, "gid \"%s\" nonexistent", *av);
+ cmd32->d[0] = grp->gr_gid;
+ cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
+ ac--; av++;
+ }
+ break;
+
+ case TOK_JAIL:
+ NEED1("jail requires argument");
+ {
+ char *end;
+ int jid;
+
+ cmd->opcode = O_JAIL;
+ jid = (int)strtol(*av, &end, 0);
+ if (jid < 0 || *end != '\0')
+ errx(EX_DATAERR, "jail requires prison ID");
+ cmd32->d[0] = (uint32_t)jid;
+ cmd->len |= F_INSN_SIZE(ipfw_insn_u32);
+ ac--; av++;
+ }
+ break;
+
+ case TOK_ESTAB:
+ fill_cmd(cmd, O_ESTAB, 0, 0);
+ break;
+
+ case TOK_SETUP:
+ fill_cmd(cmd, O_TCPFLAGS, 0,
+ (TH_SYN) | ( (TH_ACK) & 0xff) <<8 );
+ break;
+
+ case TOK_TCPDATALEN:
+ NEED1("tcpdatalen requires length");
+ if (strpbrk(*av, "-,")) {
+ if (!add_ports(cmd, *av, 0, O_TCPDATALEN))
+ errx(EX_DATAERR, "invalid tcpdata len %s", *av);
+ } else
+ fill_cmd(cmd, O_TCPDATALEN, 0,
+ strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ case TOK_TCPOPTS:
+ NEED1("missing argument for tcpoptions");
+ fill_flags(cmd, O_TCPOPTS, f_tcpopts, *av);
+ ac--; av++;
+ break;
+
+ case TOK_TCPSEQ:
+ case TOK_TCPACK:
+ NEED1("tcpseq/tcpack requires argument");
+ cmd->len = F_INSN_SIZE(ipfw_insn_u32);
+ cmd->opcode = (i == TOK_TCPSEQ) ? O_TCPSEQ : O_TCPACK;
+ cmd32->d[0] = htonl(strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ case TOK_TCPWIN:
+ NEED1("tcpwin requires length");
+ fill_cmd(cmd, O_TCPWIN, 0,
+ htons(strtoul(*av, NULL, 0)));
+ ac--; av++;
+ break;
+
+ case TOK_TCPFLAGS:
+ NEED1("missing argument for tcpflags");
+ cmd->opcode = O_TCPFLAGS;
+ fill_flags(cmd, O_TCPFLAGS, f_tcpflags, *av);
+ ac--; av++;
+ break;
+
+ case TOK_KEEPSTATE:
+ if (open_par)
+ errx(EX_USAGE, "keep-state cannot be part "
+ "of an or block");
+ if (have_state)
+ errx(EX_USAGE, "only one of keep-state "
+ "and limit is allowed");
+ have_state = cmd;
+ fill_cmd(cmd, O_KEEP_STATE, 0, 0);
+ break;
+
+ case TOK_LIMIT: {
+ ipfw_insn_limit *c = (ipfw_insn_limit *)cmd;
+ int val;
+
+ if (open_par)
+ errx(EX_USAGE,
+ "limit cannot be part of an or block");
+ if (have_state)
+ errx(EX_USAGE, "only one of keep-state and "
+ "limit is allowed");
+ have_state = cmd;
+
+ cmd->len = F_INSN_SIZE(ipfw_insn_limit);
+ cmd->opcode = O_LIMIT;
+ c->limit_mask = c->conn_limit = 0;
+
+ while (ac > 0) {
+ if ((val = match_token(limit_masks, *av)) <= 0)
+ break;
+ c->limit_mask |= val;
+ ac--; av++;
+ }
+
+ if (c->limit_mask == 0)
+ errx(EX_USAGE, "limit: missing limit mask");
+
+ GET_UINT_ARG(c->conn_limit, 1, IPFW_DEFAULT_RULE - 1,
+ TOK_LIMIT, rule_options);
+
+ ac--; av++;
+ break;
+ }
+
+ case TOK_PROTO:
+ NEED1("missing protocol");
+ if (add_proto(cmd, *av, &proto)) {
+ ac--; av++;
+ } else
+ errx(EX_DATAERR, "invalid protocol ``%s''",
+ *av);
+ break;
+
+ case TOK_SRCIP:
+ NEED1("missing source IP");
+ if (add_srcip(cmd, *av)) {
+ ac--; av++;
+ }
+ break;
+
+ case TOK_DSTIP:
+ NEED1("missing destination IP");
+ if (add_dstip(cmd, *av)) {
+ ac--; av++;
+ }
+ break;
+
+ case TOK_SRCIP6:
+ NEED1("missing source IP6");
+ if (add_srcip6(cmd, *av)) {
+ ac--; av++;
+ }
+ break;
+
+ case TOK_DSTIP6:
+ NEED1("missing destination IP6");
+ if (add_dstip6(cmd, *av)) {
+ ac--; av++;
+ }
+ break;
+
+ case TOK_SRCPORT:
+ NEED1("missing source port");
+ if (_substrcmp(*av, "any") == 0 ||
+ add_ports(cmd, *av, proto, O_IP_SRCPORT)) {
+ ac--; av++;
+ } else
+ errx(EX_DATAERR, "invalid source port %s", *av);
+ break;
+
+ case TOK_DSTPORT:
+ NEED1("missing destination port");
+ if (_substrcmp(*av, "any") == 0 ||
+ add_ports(cmd, *av, proto, O_IP_DSTPORT)) {
+ ac--; av++;
+ } else
+ errx(EX_DATAERR, "invalid destination port %s",
+ *av);
+ break;
+
+ case TOK_MAC:
+ if (add_mac(cmd, ac, av)) {
+ ac -= 2; av += 2;
+ }
+ break;
+
+ case TOK_MACTYPE:
+ NEED1("missing mac type");
+ if (!add_mactype(cmd, ac, *av))
+ errx(EX_DATAERR, "invalid mac type %s", *av);
+ ac--; av++;
+ break;
+
+ case TOK_VERREVPATH:
+ fill_cmd(cmd, O_VERREVPATH, 0, 0);
+ break;
+
+ case TOK_VERSRCREACH:
+ fill_cmd(cmd, O_VERSRCREACH, 0, 0);
+ break;
+
+ case TOK_ANTISPOOF:
+ fill_cmd(cmd, O_ANTISPOOF, 0, 0);
+ break;
+
+ case TOK_IPSEC:
+ fill_cmd(cmd, O_IPSEC, 0, 0);
+ break;
+
+ case TOK_IPV6:
+ fill_cmd(cmd, O_IP6, 0, 0);
+ break;
+
+ case TOK_IPV4:
+ fill_cmd(cmd, O_IP4, 0, 0);
+ break;
+
+ case TOK_EXT6HDR:
+ fill_ext6hdr( cmd, *av );
+ ac--; av++;
+ break;
+
+ case TOK_FLOWID:
+ if (proto != IPPROTO_IPV6 )
+ errx( EX_USAGE, "flow-id filter is active "
+ "only for ipv6 protocol\n");
+ fill_flow6( (ipfw_insn_u32 *) cmd, *av );
+ ac--; av++;
+ break;
+
+ case TOK_COMMENT:
+ fill_comment(cmd, ac, av);
+ av += ac;
+ ac = 0;
+ break;
+
+ case TOK_TAGGED:
+ if (ac > 0 && strpbrk(*av, "-,")) {
+ if (!add_ports(cmd, *av, 0, O_TAGGED))
+ errx(EX_DATAERR, "tagged: invalid tag"
+ " list: %s", *av);
+ }
+ else {
+ uint16_t tag;
+
+ GET_UINT_ARG(tag, 1, IPFW_DEFAULT_RULE - 1,
+ TOK_TAGGED, rule_options);
+ fill_cmd(cmd, O_TAGGED, 0, tag);
+ }
+ ac--; av++;
+ break;
+
+ case TOK_FIB:
+ NEED1("fib requires fib number");
+ fill_cmd(cmd, O_FIB, 0, strtoul(*av, NULL, 0));
+ ac--; av++;
+ break;
+
+ default:
+ errx(EX_USAGE, "unrecognised option [%d] %s\n", i, s);
+ }
+ if (F_LEN(cmd) > 0) { /* prepare to advance */
+ prev = cmd;
+ cmd = next_cmd(cmd);
+ }
+ }
+
+done:
+ /*
+ * Now copy stuff into the rule.
+ * If we have a keep-state option, the first instruction
+ * must be a PROBE_STATE (which is generated here).
+ * If we have a LOG option, it was stored as the first command,
+ * and now must be moved to the top of the action part.
+ */
+ dst = (ipfw_insn *)rule->cmd;
+
+ /*
+ * First thing to write into the command stream is the match probability.
+ */
+ if (match_prob != 1) { /* 1 means always match */
+ dst->opcode = O_PROB;
+ dst->len = 2;
+ *((int32_t *)(dst+1)) = (int32_t)(match_prob * 0x7fffffff);
+ dst += dst->len;
+ }
+
+ /*
+ * generate O_PROBE_STATE if necessary
+ */
+ if (have_state && have_state->opcode != O_CHECK_STATE) {
+ fill_cmd(dst, O_PROBE_STATE, 0, 0);
+ dst = next_cmd(dst);
+ }
+
+ /* copy all commands but O_LOG, O_KEEP_STATE, O_LIMIT, O_ALTQ, O_TAG */
+ for (src = (ipfw_insn *)cmdbuf; src != cmd; src += i) {
+ i = F_LEN(src);
+
+ switch (src->opcode) {
+ case O_LOG:
+ case O_KEEP_STATE:
+ case O_LIMIT:
+ case O_ALTQ:
+ case O_TAG:
+ break;
+ default:
+ bcopy(src, dst, i * sizeof(uint32_t));
+ dst += i;
+ }
+ }
+
+ /*
+ * put back the have_state command as last opcode
+ */
+ if (have_state && have_state->opcode != O_CHECK_STATE) {
+ i = F_LEN(have_state);
+ bcopy(have_state, dst, i * sizeof(uint32_t));
+ dst += i;
+ }
+ /*
+ * start action section
+ */
+ rule->act_ofs = dst - rule->cmd;
+
+ /* put back O_LOG, O_ALTQ, O_TAG if necessary */
+ if (have_log) {
+ i = F_LEN(have_log);
+ bcopy(have_log, dst, i * sizeof(uint32_t));
+ dst += i;
+ }
+ if (have_altq) {
+ i = F_LEN(have_altq);
+ bcopy(have_altq, dst, i * sizeof(uint32_t));
+ dst += i;
+ }
+ if (have_tag) {
+ i = F_LEN(have_tag);
+ bcopy(have_tag, dst, i * sizeof(uint32_t));
+ dst += i;
+ }
+ /*
+ * copy all other actions
+ */
+ for (src = (ipfw_insn *)actbuf; src != action; src += i) {
+ i = F_LEN(src);
+ bcopy(src, dst, i * sizeof(uint32_t));
+ dst += i;
+ }
+
+ rule->cmd_len = (uint32_t *)dst - (uint32_t *)(rule->cmd);
+ i = (char *)dst - (char *)rule;
+ if (do_cmd(IP_FW_ADD, rule, (uintptr_t)&i) == -1)
+ err(EX_UNAVAILABLE, "getsockopt(%s)", "IP_FW_ADD");
+ if (!co.do_quiet)
+ show_ipfw(rule, 0, 0);
+}
+
+/*
+ * clear the counters or the log counters.
+ */
+void
+ipfw_zero(int ac, char *av[], int optname /* 0 = IP_FW_ZERO, 1 = IP_FW_RESETLOG */)
+{
+ uint32_t arg, saved_arg;
+ int failed = EX_OK;
+ char const *errstr;
+ char const *name = optname ? "RESETLOG" : "ZERO";
+
+ optname = optname ? IP_FW_RESETLOG : IP_FW_ZERO;
+
+ av++; ac--;
+
+ if (!ac) {
+ /* clear all entries */
+ if (do_cmd(optname, NULL, 0) < 0)
+ err(EX_UNAVAILABLE, "setsockopt(IP_FW_%s)", name);
+ if (!co.do_quiet)
+ printf("%s.\n", optname == IP_FW_ZERO ?
+ "Accounting cleared":"Logging counts reset");
+
+ return;
+ }
+
+ while (ac) {
+ /* Rule number */
+ if (isdigit(**av)) {
+ arg = strtonum(*av, 0, 0xffff, &errstr);
+ if (errstr)
+ errx(EX_DATAERR,
+ "invalid rule number %s\n", *av);
+ saved_arg = arg;
+ if (co.use_set)
+ arg |= (1 << 24) | ((co.use_set - 1) << 16);
+ av++;
+ ac--;
+ if (do_cmd(optname, &arg, sizeof(arg))) {
+ warn("rule %u: setsockopt(IP_FW_%s)",
+ saved_arg, name);
+ failed = EX_UNAVAILABLE;
+ } else if (!co.do_quiet)
+ printf("Entry %d %s.\n", saved_arg,
+ optname == IP_FW_ZERO ?
+ "cleared" : "logging count reset");
+ } else {
+ errx(EX_USAGE, "invalid rule number ``%s''", *av);
+ }
+ }
+ if (failed != EX_OK)
+ exit(failed);
+}
+
+void
+ipfw_flush(int force)
+{
+ int cmd = co.do_pipe ? IP_DUMMYNET_FLUSH : IP_FW_FLUSH;
+
+ if (!force && !co.do_quiet) { /* need to ask user */
+ int c;
+
+ printf("Are you sure? [yn] ");
+ fflush(stdout);
+ do {
+ c = toupper(getc(stdin));
+ while (c != '\n' && getc(stdin) != '\n')
+ if (feof(stdin))
+ return; /* and do not flush */
+ } while (c != 'Y' && c != 'N');
+ printf("\n");
+ if (c == 'N') /* user said no */
+ return;
+ }
+ /* `ipfw set N flush` - is the same that `ipfw delete set N` */
+ if (co.use_set) {
+ uint32_t arg = ((co.use_set - 1) & 0xffff) | (1 << 24);
+ if (do_cmd(IP_FW_DEL, &arg, sizeof(arg)) < 0)
+ err(EX_UNAVAILABLE, "setsockopt(IP_FW_DEL)");
+ } else if (do_cmd(cmd, NULL, 0) < 0)
+ err(EX_UNAVAILABLE, "setsockopt(IP_%s_FLUSH)",
+ co.do_pipe ? "DUMMYNET" : "FW");
+ if (!co.do_quiet)
+ printf("Flushed all %s.\n", co.do_pipe ? "pipes" : "rules");
+}
+
+
+static void table_list(ipfw_table_entry ent, int need_header);
+
+/*
+ * This one handles all table-related commands
+ * ipfw table N add addr[/masklen] [value]
+ * ipfw table N delete addr[/masklen]
+ * ipfw table {N | all} flush
+ * ipfw table {N | all} list
+ */
+void
+ipfw_table_handler(int ac, char *av[])
+{
+ ipfw_table_entry ent;
+ int do_add;
+ int is_all;
+ size_t len;
+ char *p;
+ uint32_t a;
+ uint32_t tables_max;
+
+ len = sizeof(tables_max);
+ if (sysctlbyname("net.inet.ip.fw.tables_max", &tables_max, &len,
+ NULL, 0) == -1) {
+#ifdef IPFW_TABLES_MAX
+ warn("Warn: Failed to get the max tables number via sysctl. "
+ "Using the compiled in defaults. \nThe reason was");
+ tables_max = IPFW_TABLES_MAX;
+#else
+ errx(1, "Failed sysctlbyname(\"net.inet.ip.fw.tables_max\")");
+#endif
+ }
+
+ ac--; av++;
+ if (ac && isdigit(**av)) {
+ ent.tbl = atoi(*av);
+ is_all = 0;
+ ac--; av++;
+ } else if (ac && _substrcmp(*av, "all") == 0) {
+ ent.tbl = 0;
+ is_all = 1;
+ ac--; av++;
+ } else
+ errx(EX_USAGE, "table number or 'all' keyword required");
+ if (ent.tbl >= tables_max)
+ errx(EX_USAGE, "The table number exceeds the maximum allowed "
+ "value (%d)", tables_max - 1);
+ NEED1("table needs command");
+ if (is_all && _substrcmp(*av, "list") != 0
+ && _substrcmp(*av, "flush") != 0)
+ errx(EX_USAGE, "table number required");
+
+ if (_substrcmp(*av, "add") == 0 ||
+ _substrcmp(*av, "delete") == 0) {
+ do_add = **av == 'a';
+ ac--; av++;
+ if (!ac)
+ errx(EX_USAGE, "IP address required");
+ p = strchr(*av, '/');
+ if (p) {
+ *p++ = '\0';
+ ent.masklen = atoi(p);
+ if (ent.masklen > 32)
+ errx(EX_DATAERR, "bad width ``%s''", p);
+ } else
+ ent.masklen = 32;
+ if (lookup_host(*av, (struct in_addr *)&ent.addr) != 0)
+ errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
+ ac--; av++;
+ if (do_add && ac) {
+ unsigned int tval;
+ /* isdigit is a bit of a hack here.. */
+ if (strchr(*av, (int)'.') == NULL && isdigit(**av)) {
+ ent.value = strtoul(*av, NULL, 0);
+ } else {
+ if (lookup_host(*av, (struct in_addr *)&tval) == 0) {
+ /* The value must be stored in host order *
+ * so that the values < 65k can be distinguished */
+ ent.value = ntohl(tval);
+ } else {
+ errx(EX_NOHOST, "hostname ``%s'' unknown", *av);
+ }
+ }
+ } else
+ ent.value = 0;
+ if (do_cmd(do_add ? IP_FW_TABLE_ADD : IP_FW_TABLE_DEL,
+ &ent, sizeof(ent)) < 0) {
+ /* If running silent, don't bomb out on these errors. */
+ if (!(co.do_quiet && (errno == (do_add ? EEXIST : ESRCH))))
+ err(EX_OSERR, "setsockopt(IP_FW_TABLE_%s)",
+ do_add ? "ADD" : "DEL");
+ /* In silent mode, react to a failed add by deleting */
+ if (do_add) {
+ do_cmd(IP_FW_TABLE_DEL, &ent, sizeof(ent));
+ if (do_cmd(IP_FW_TABLE_ADD,
+ &ent, sizeof(ent)) < 0)
+ err(EX_OSERR,
+ "setsockopt(IP_FW_TABLE_ADD)");
+ }
+ }
+ } else if (_substrcmp(*av, "flush") == 0) {
+ a = is_all ? tables_max : (ent.tbl + 1);
+ do {
+ if (do_cmd(IP_FW_TABLE_FLUSH, &ent.tbl,
+ sizeof(ent.tbl)) < 0)
+ err(EX_OSERR, "setsockopt(IP_FW_TABLE_FLUSH)");
+ } while (++ent.tbl < a);
+ } else if (_substrcmp(*av, "list") == 0) {
+ a = is_all ? tables_max : (ent.tbl + 1);
+ do {
+ table_list(ent, is_all);
+ } while (++ent.tbl < a);
+ } else
+ errx(EX_USAGE, "invalid table command %s", *av);
+}
+
+static void
+table_list(ipfw_table_entry ent, int need_header)
+{
+ ipfw_table *tbl;
+ socklen_t l;
+ uint32_t a;
+
+ a = ent.tbl;
+ l = sizeof(a);
+ if (do_cmd(IP_FW_TABLE_GETSIZE, &a, (uintptr_t)&l) < 0)
+ err(EX_OSERR, "getsockopt(IP_FW_TABLE_GETSIZE)");
+
+ /* If a is zero we have nothing to do, the table is empty. */
+ if (a == 0)
+ return;
+
+ l = sizeof(*tbl) + a * sizeof(ipfw_table_entry);
+ tbl = safe_calloc(1, l);
+ tbl->tbl = ent.tbl;
+ if (do_cmd(IP_FW_TABLE_LIST, tbl, (uintptr_t)&l) < 0)
+ err(EX_OSERR, "getsockopt(IP_FW_TABLE_LIST)");
+ if (tbl->cnt && need_header)
+ printf("---table(%d)---\n", tbl->tbl);
+ for (a = 0; a < tbl->cnt; a++) {
+ unsigned int tval;
+ tval = tbl->ent[a].value;
+ if (co.do_value_as_ip) {
+ char tbuf[128];
+ strncpy(tbuf, inet_ntoa(*(struct in_addr *)
+ &tbl->ent[a].addr), 127);
+ /* inet_ntoa expects network order */
+ tval = htonl(tval);
+ printf("%s/%u %s\n", tbuf, tbl->ent[a].masklen,
+ inet_ntoa(*(struct in_addr *)&tval));
+ } else {
+ printf("%s/%u %u\n",
+ inet_ntoa(*(struct in_addr *)&tbl->ent[a].addr),
+ tbl->ent[a].masklen, tval);
+ }
+ }
+ free(tbl);
+}
git://git.onelab.eu / ipfw.git / blobdiff