Currently we have different table key types which can easily interfere with each other (numbers and IPv4 address, interface names and hostnames, flows and hostnames/addresses). This conflicts are solved by [auto-]creating _typed_ tables, so after table is created, only keys of given type can be inserted to that table. ipfw(8) consults with kernel about key/value type for particular table so it knows key/value interpretation. However, we have 2 cases (adding entries to non-existing table and parsing configuration file via `ipfw -n`) when kernel is unable to provide us table info we need. Fix the latter case by partially importing old `table_fill_xentry()` parse function responsible for guessing key type. Sponsored by: Yandex LLC
2030 lines
44 KiB
C
2030 lines
44 KiB
C
/*
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* Copyright (c) 2014 Yandex LLC
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* Copyright (c) 2014 Alexander V. Chernikov
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*
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* in-kernel ipfw tables support.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/ip_fw.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include "ipfw2.h"
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static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[],
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int add, int quiet, int update, int atomic);
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static int table_flush(ipfw_obj_header *oh);
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static int table_destroy(ipfw_obj_header *oh);
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static int table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i);
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static int table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i);
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static int table_do_swap(ipfw_obj_header *oh, char *second);
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static void table_create(ipfw_obj_header *oh, int ac, char *av[]);
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static void table_modify(ipfw_obj_header *oh, int ac, char *av[]);
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static void table_lookup(ipfw_obj_header *oh, int ac, char *av[]);
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static void table_lock(ipfw_obj_header *oh, int lock);
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static int table_swap(ipfw_obj_header *oh, char *second);
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static int table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i);
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static int table_show_info(ipfw_xtable_info *i, void *arg);
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static void table_fill_ntlv(ipfw_obj_ntlv *ntlv, char *name, uint32_t set,
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uint16_t uidx);
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static int table_flush_one(ipfw_xtable_info *i, void *arg);
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static int table_show_one(ipfw_xtable_info *i, void *arg);
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static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh);
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static void table_show_list(ipfw_obj_header *oh, int need_header);
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static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent);
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static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent,
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char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi);
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static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent,
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char *arg, uint8_t type, uint32_t vmask);
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static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
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uint32_t vmask, int print_ip);
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typedef int (table_cb_t)(ipfw_xtable_info *i, void *arg);
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static int tables_foreach(table_cb_t *f, void *arg, int sort);
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#ifndef s6_addr32
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#define s6_addr32 __u6_addr.__u6_addr32
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#endif
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static struct _s_x tabletypes[] = {
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{ "addr", IPFW_TABLE_ADDR },
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{ "iface", IPFW_TABLE_INTERFACE },
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{ "number", IPFW_TABLE_NUMBER },
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{ "flow", IPFW_TABLE_FLOW },
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{ NULL, 0 }
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};
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static struct _s_x tablevaltypes[] = {
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{ "skipto", IPFW_VTYPE_SKIPTO },
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{ "pipe", IPFW_VTYPE_PIPE },
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{ "fib", IPFW_VTYPE_FIB },
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{ "nat", IPFW_VTYPE_NAT },
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{ "dscp", IPFW_VTYPE_DSCP },
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{ "tag", IPFW_VTYPE_TAG },
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{ "divert", IPFW_VTYPE_DIVERT },
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{ "netgraph", IPFW_VTYPE_NETGRAPH },
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{ "limit", IPFW_VTYPE_LIMIT },
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{ "ipv4", IPFW_VTYPE_NH4 },
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{ "ipv6", IPFW_VTYPE_NH6 },
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{ NULL, 0 }
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};
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static struct _s_x tablecmds[] = {
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{ "add", TOK_ADD },
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{ "delete", TOK_DEL },
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{ "create", TOK_CREATE },
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{ "destroy", TOK_DESTROY },
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{ "flush", TOK_FLUSH },
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{ "modify", TOK_MODIFY },
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{ "swap", TOK_SWAP },
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{ "info", TOK_INFO },
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{ "detail", TOK_DETAIL },
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{ "list", TOK_LIST },
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{ "lookup", TOK_LOOKUP },
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{ "atomic", TOK_ATOMIC },
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{ "lock", TOK_LOCK },
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{ "unlock", TOK_UNLOCK },
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{ NULL, 0 }
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};
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static int
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lookup_host (char *host, struct in_addr *ipaddr)
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{
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struct hostent *he;
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if (!inet_aton(host, ipaddr)) {
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if ((he = gethostbyname(host)) == NULL)
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return(-1);
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*ipaddr = *(struct in_addr *)he->h_addr_list[0];
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}
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return(0);
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}
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static int
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get_token(struct _s_x *table, char *string, char *errbase)
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{
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int tcmd;
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if ((tcmd = match_token_relaxed(table, string)) < 0)
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errx(EX_USAGE, "%s %s %s",
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(tcmd == 0) ? "invalid" : "ambiguous", errbase, string);
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return (tcmd);
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}
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/*
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* This one handles all table-related commands
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* ipfw table NAME create ...
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* ipfw table NAME modify ...
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* ipfw table NAME destroy
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* ipfw table NAME swap NAME
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* ipfw table NAME lock
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* ipfw table NAME unlock
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* ipfw table NAME add addr[/masklen] [value]
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* ipfw table NAME add [addr[/masklen] value] [addr[/masklen] value] ..
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* ipfw table NAME delete addr[/masklen] [addr[/masklen]] ..
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* ipfw table NAME lookup addr
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* ipfw table {NAME | all} flush
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* ipfw table {NAME | all} list
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* ipfw table {NAME | all} info
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* ipfw table {NAME | all} detail
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*/
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void
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ipfw_table_handler(int ac, char *av[])
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{
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int do_add, is_all;
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int atomic, error, tcmd;
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ipfw_xtable_info i;
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ipfw_obj_header oh;
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char *tablename;
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uint32_t set;
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void *arg;
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memset(&oh, 0, sizeof(oh));
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is_all = 0;
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if (co.use_set != 0)
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set = co.use_set - 1;
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else
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set = 0;
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ac--; av++;
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NEED1("table needs name");
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tablename = *av;
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if (table_check_name(tablename) == 0) {
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table_fill_ntlv(&oh.ntlv, *av, set, 1);
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oh.idx = 1;
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} else {
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if (strcmp(tablename, "all") == 0)
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is_all = 1;
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else
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errx(EX_USAGE, "table name %s is invalid", tablename);
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}
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ac--; av++;
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NEED1("table needs command");
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tcmd = get_token(tablecmds, *av, "table command");
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/* Check if atomic operation was requested */
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atomic = 0;
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if (tcmd == TOK_ATOMIC) {
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ac--; av++;
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NEED1("atomic needs command");
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tcmd = get_token(tablecmds, *av, "table command");
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switch (tcmd) {
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case TOK_ADD:
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break;
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default:
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errx(EX_USAGE, "atomic is not compatible with %s", *av);
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}
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atomic = 1;
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}
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switch (tcmd) {
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case TOK_LIST:
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case TOK_INFO:
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case TOK_DETAIL:
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case TOK_FLUSH:
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break;
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default:
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if (is_all != 0)
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errx(EX_USAGE, "table name required");
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}
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switch (tcmd) {
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case TOK_ADD:
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case TOK_DEL:
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do_add = **av == 'a';
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ac--; av++;
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table_modify_record(&oh, ac, av, do_add, co.do_quiet,
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co.do_quiet, atomic);
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break;
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case TOK_CREATE:
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ac--; av++;
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table_create(&oh, ac, av);
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break;
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case TOK_MODIFY:
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ac--; av++;
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table_modify(&oh, ac, av);
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break;
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case TOK_DESTROY:
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if (table_destroy(&oh) != 0)
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err(EX_OSERR, "failed to destroy table %s", tablename);
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break;
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case TOK_FLUSH:
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if (is_all == 0) {
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if ((error = table_flush(&oh)) != 0)
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err(EX_OSERR, "failed to flush table %s info",
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tablename);
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} else {
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error = tables_foreach(table_flush_one, &oh, 1);
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if (error != 0)
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err(EX_OSERR, "failed to flush tables list");
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}
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break;
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case TOK_SWAP:
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ac--; av++;
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NEED1("second table name required");
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table_swap(&oh, *av);
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break;
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case TOK_LOCK:
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case TOK_UNLOCK:
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table_lock(&oh, (tcmd == TOK_LOCK));
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break;
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case TOK_DETAIL:
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case TOK_INFO:
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arg = (tcmd == TOK_DETAIL) ? (void *)1 : NULL;
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if (is_all == 0) {
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if ((error = table_get_info(&oh, &i)) != 0)
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err(EX_OSERR, "failed to request table info");
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table_show_info(&i, arg);
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} else {
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error = tables_foreach(table_show_info, arg, 1);
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if (error != 0)
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err(EX_OSERR, "failed to request tables list");
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}
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break;
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case TOK_LIST:
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if (is_all == 0) {
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ipfw_xtable_info i;
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if ((error = table_get_info(&oh, &i)) != 0)
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err(EX_OSERR, "failed to request table info");
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table_show_one(&i, NULL);
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} else {
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error = tables_foreach(table_show_one, NULL, 1);
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if (error != 0)
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err(EX_OSERR, "failed to request tables list");
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}
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break;
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case TOK_LOOKUP:
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ac--; av++;
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table_lookup(&oh, ac, av);
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break;
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}
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}
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static void
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table_fill_ntlv(ipfw_obj_ntlv *ntlv, char *name, uint32_t set, uint16_t uidx)
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{
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ntlv->head.type = IPFW_TLV_TBL_NAME;
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ntlv->head.length = sizeof(ipfw_obj_ntlv);
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ntlv->idx = uidx;
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ntlv->set = set;
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strlcpy(ntlv->name, name, sizeof(ntlv->name));
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}
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static void
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table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i)
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{
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oh->idx = 1;
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table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
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}
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static struct _s_x tablenewcmds[] = {
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{ "type", TOK_TYPE },
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{ "valtype", TOK_VALTYPE },
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{ "algo", TOK_ALGO },
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{ "limit", TOK_LIMIT },
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{ "locked", TOK_LOCK },
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{ NULL, 0 }
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};
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static struct _s_x flowtypecmds[] = {
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{ "src-ip", IPFW_TFFLAG_SRCIP },
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{ "proto", IPFW_TFFLAG_PROTO },
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{ "src-port", IPFW_TFFLAG_SRCPORT },
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{ "dst-ip", IPFW_TFFLAG_DSTIP },
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{ "dst-port", IPFW_TFFLAG_DSTPORT },
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{ NULL, 0 }
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};
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int
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table_parse_type(uint8_t ttype, char *p, uint8_t *tflags)
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{
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uint32_t fset, fclear;
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char *e;
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/* Parse type options */
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switch(ttype) {
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case IPFW_TABLE_FLOW:
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fset = fclear = 0;
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if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0)
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errx(EX_USAGE,
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"unable to parse flow option %s", e);
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*tflags = fset;
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break;
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default:
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return (EX_USAGE);
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}
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return (0);
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}
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void
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table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags)
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{
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const char *tname;
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int l;
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if ((tname = match_value(tabletypes, type)) == NULL)
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tname = "unknown";
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l = snprintf(tbuf, size, "%s", tname);
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tbuf += l;
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size -= l;
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switch(type) {
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case IPFW_TABLE_FLOW:
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if (tflags != 0) {
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*tbuf++ = ':';
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l--;
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print_flags_buffer(tbuf, size, flowtypecmds, tflags);
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}
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break;
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}
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}
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/*
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* Creates new table
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*
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* ipfw table NAME create [ type { addr | iface | number | flow } ]
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* [ algo algoname ]
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*/
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static void
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table_create(ipfw_obj_header *oh, int ac, char *av[])
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{
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ipfw_xtable_info xi;
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int error, tcmd, val;
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uint32_t fset, fclear;
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size_t sz;
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char *e, *p;
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char tbuf[128];
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sz = sizeof(tbuf);
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memset(&xi, 0, sizeof(xi));
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while (ac > 0) {
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tcmd = get_token(tablenewcmds, *av, "option");
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ac--; av++;
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switch (tcmd) {
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case TOK_LIMIT:
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NEED1("limit value required");
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xi.limit = strtol(*av, NULL, 10);
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ac--; av++;
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break;
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case TOK_TYPE:
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NEED1("table type required");
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/* Type may have suboptions after ':' */
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if ((p = strchr(*av, ':')) != NULL)
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*p++ = '\0';
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val = match_token(tabletypes, *av);
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if (val == -1) {
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concat_tokens(tbuf, sizeof(tbuf), tabletypes,
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", ");
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errx(EX_USAGE,
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"Unknown tabletype: %s. Supported: %s",
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*av, tbuf);
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}
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xi.type = val;
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if (p != NULL) {
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error = table_parse_type(val, p, &xi.tflags);
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if (error != 0)
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errx(EX_USAGE,
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"Unsupported suboptions: %s", p);
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}
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ac--; av++;
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break;
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case TOK_VALTYPE:
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NEED1("table value type required");
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fset = fclear = 0;
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val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear);
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if (val != -1) {
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xi.vmask = fset;
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ac--; av++;
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break;
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}
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concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", ");
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errx(EX_USAGE, "Unknown value type: %s. Supported: %s",
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e, tbuf);
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break;
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case TOK_ALGO:
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NEED1("table algorithm name required");
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if (strlen(*av) > sizeof(xi.algoname))
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errx(EX_USAGE, "algorithm name too long");
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strlcpy(xi.algoname, *av, sizeof(xi.algoname));
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ac--; av++;
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break;
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case TOK_LOCK:
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xi.flags |= IPFW_TGFLAGS_LOCKED;
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break;
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}
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}
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/* Set some defaults to preserve compability */
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if (xi.algoname[0] == '\0' && xi.type == 0)
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xi.type = IPFW_TABLE_ADDR;
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if (xi.vmask == 0)
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xi.vmask = IPFW_VTYPE_LEGACY;
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if ((error = table_do_create(oh, &xi)) != 0)
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err(EX_OSERR, "Table creation failed");
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}
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/*
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* Creates new table
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*
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* Request: [ ipfw_obj_header ipfw_xtable_info ]
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*
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* Returns 0 on success.
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*/
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static int
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table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i)
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{
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char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
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int error;
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memcpy(tbuf, oh, sizeof(*oh));
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memcpy(tbuf + sizeof(*oh), i, sizeof(*i));
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oh = (ipfw_obj_header *)tbuf;
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error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf));
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return (error);
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}
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/*
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* Modifies existing table
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*
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* ipfw table NAME modify [ limit number ]
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*/
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static void
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table_modify(ipfw_obj_header *oh, int ac, char *av[])
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{
|
|
ipfw_xtable_info xi;
|
|
int tcmd;
|
|
size_t sz;
|
|
char tbuf[128];
|
|
|
|
sz = sizeof(tbuf);
|
|
memset(&xi, 0, sizeof(xi));
|
|
|
|
while (ac > 0) {
|
|
tcmd = get_token(tablenewcmds, *av, "option");
|
|
ac--; av++;
|
|
|
|
switch (tcmd) {
|
|
case TOK_LIMIT:
|
|
NEED1("limit value required");
|
|
xi.limit = strtol(*av, NULL, 10);
|
|
xi.mflags |= IPFW_TMFLAGS_LIMIT;
|
|
ac--; av++;
|
|
break;
|
|
default:
|
|
errx(EX_USAGE, "cmd is not supported for modificatiob");
|
|
}
|
|
}
|
|
|
|
if (table_do_modify(oh, &xi) != 0)
|
|
err(EX_OSERR, "Table modification failed");
|
|
}
|
|
|
|
/*
|
|
* Modifies existing table.
|
|
*
|
|
* Request: [ ipfw_obj_header ipfw_xtable_info ]
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i)
|
|
{
|
|
char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
|
|
int error;
|
|
|
|
memcpy(tbuf, oh, sizeof(*oh));
|
|
memcpy(tbuf + sizeof(*oh), i, sizeof(*i));
|
|
oh = (ipfw_obj_header *)tbuf;
|
|
|
|
error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf));
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Locks or unlocks given table
|
|
*/
|
|
static void
|
|
table_lock(ipfw_obj_header *oh, int lock)
|
|
{
|
|
ipfw_xtable_info xi;
|
|
|
|
memset(&xi, 0, sizeof(xi));
|
|
|
|
xi.mflags |= IPFW_TMFLAGS_LOCK;
|
|
xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0;
|
|
|
|
if (table_do_modify(oh, &xi) != 0)
|
|
err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock");
|
|
}
|
|
|
|
/*
|
|
* Destroys given table specified by @oh->ntlv.
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
table_destroy(ipfw_obj_header *oh)
|
|
{
|
|
|
|
if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0)
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Flushes given table specified by @oh->ntlv.
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
table_flush(ipfw_obj_header *oh)
|
|
{
|
|
|
|
if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0)
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
table_do_swap(ipfw_obj_header *oh, char *second)
|
|
{
|
|
char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)];
|
|
int error;
|
|
|
|
memset(tbuf, 0, sizeof(tbuf));
|
|
memcpy(tbuf, oh, sizeof(*oh));
|
|
oh = (ipfw_obj_header *)tbuf;
|
|
table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1);
|
|
|
|
error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf));
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Swaps given table with @second one.
|
|
*/
|
|
static int
|
|
table_swap(ipfw_obj_header *oh, char *second)
|
|
{
|
|
int error;
|
|
|
|
if (table_check_name(second) != 0)
|
|
errx(EX_USAGE, "table name %s is invalid", second);
|
|
|
|
error = table_do_swap(oh, second);
|
|
|
|
switch (error) {
|
|
case EINVAL:
|
|
errx(EX_USAGE, "Unable to swap table: check types");
|
|
case EFBIG:
|
|
errx(EX_USAGE, "Unable to swap table: check limits");
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Retrieves table in given table specified by @oh->ntlv.
|
|
* it inside @i.
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i)
|
|
{
|
|
char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
|
|
size_t sz;
|
|
|
|
sz = sizeof(tbuf);
|
|
memset(tbuf, 0, sizeof(tbuf));
|
|
memcpy(tbuf, oh, sizeof(*oh));
|
|
oh = (ipfw_obj_header *)tbuf;
|
|
|
|
if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0)
|
|
return (errno);
|
|
|
|
if (sz < sizeof(tbuf))
|
|
return (EINVAL);
|
|
|
|
*i = *(ipfw_xtable_info *)(oh + 1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct _s_x tablealgoclass[] = {
|
|
{ "hash", IPFW_TACLASS_HASH },
|
|
{ "array", IPFW_TACLASS_ARRAY },
|
|
{ "radix", IPFW_TACLASS_RADIX },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
struct ta_cldata {
|
|
uint8_t taclass;
|
|
uint8_t spare4;
|
|
uint16_t itemsize;
|
|
uint16_t itemsize6;
|
|
uint32_t size;
|
|
uint32_t count;
|
|
};
|
|
|
|
/*
|
|
* Print global/per-AF table @i algorithm info.
|
|
*/
|
|
static void
|
|
table_show_tainfo(ipfw_xtable_info *i, struct ta_cldata *d,
|
|
const char *af, const char *taclass)
|
|
{
|
|
|
|
switch (d->taclass) {
|
|
case IPFW_TACLASS_HASH:
|
|
case IPFW_TACLASS_ARRAY:
|
|
printf(" %salgorithm %s info\n", af, taclass);
|
|
if (d->itemsize == d->itemsize6)
|
|
printf(" size: %u items: %u itemsize: %u\n",
|
|
d->size, d->count, d->itemsize);
|
|
else
|
|
printf(" size: %u items: %u "
|
|
"itemsize4: %u itemsize6: %u\n",
|
|
d->size, d->count,
|
|
d->itemsize, d->itemsize6);
|
|
break;
|
|
case IPFW_TACLASS_RADIX:
|
|
printf(" %salgorithm %s info\n", af, taclass);
|
|
if (d->itemsize == d->itemsize6)
|
|
printf(" items: %u itemsize: %u\n",
|
|
d->count, d->itemsize);
|
|
else
|
|
printf(" items: %u "
|
|
"itemsize4: %u itemsize6: %u\n",
|
|
d->count, d->itemsize, d->itemsize6);
|
|
break;
|
|
default:
|
|
printf(" algo class: %s\n", taclass);
|
|
}
|
|
}
|
|
|
|
static void
|
|
table_print_valheader(char *buf, size_t bufsize, uint32_t vmask)
|
|
{
|
|
|
|
if (vmask == IPFW_VTYPE_LEGACY) {
|
|
snprintf(buf, bufsize, "legacy");
|
|
return;
|
|
}
|
|
|
|
memset(buf, 0, bufsize);
|
|
print_flags_buffer(buf, bufsize, tablevaltypes, vmask);
|
|
}
|
|
|
|
/*
|
|
* Prints table info struct @i in human-readable form.
|
|
*/
|
|
static int
|
|
table_show_info(ipfw_xtable_info *i, void *arg)
|
|
{
|
|
const char *vtype;
|
|
ipfw_ta_tinfo *tainfo;
|
|
int afdata, afitem;
|
|
struct ta_cldata d;
|
|
char ttype[64], tvtype[64];
|
|
|
|
table_print_type(ttype, sizeof(ttype), i->type, i->tflags);
|
|
table_print_valheader(tvtype, sizeof(tvtype), i->vmask);
|
|
|
|
printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
|
|
if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0)
|
|
printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype);
|
|
else
|
|
printf(" kindex: %d, type: %s\n", i->kidx, ttype);
|
|
printf(" references: %u, valtype: %s\n", i->refcnt, tvtype);
|
|
printf(" algorithm: %s\n", i->algoname);
|
|
printf(" items: %u, size: %u\n", i->count, i->size);
|
|
if (i->limit > 0)
|
|
printf(" limit: %u\n", i->limit);
|
|
|
|
/* Print algo-specific info if requested & set */
|
|
if (arg == NULL)
|
|
return (0);
|
|
|
|
if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0)
|
|
return (0);
|
|
tainfo = &i->ta_info;
|
|
|
|
afdata = 0;
|
|
afitem = 0;
|
|
if (tainfo->flags & IPFW_TATFLAGS_AFDATA)
|
|
afdata = 1;
|
|
if (tainfo->flags & IPFW_TATFLAGS_AFITEM)
|
|
afitem = 1;
|
|
|
|
memset(&d, 0, sizeof(d));
|
|
d.taclass = tainfo->taclass4;
|
|
d.size = tainfo->size4;
|
|
d.count = tainfo->count4;
|
|
d.itemsize = tainfo->itemsize4;
|
|
if (afdata == 0 && afitem != 0)
|
|
d.itemsize6 = tainfo->itemsize6;
|
|
else
|
|
d.itemsize6 = d.itemsize;
|
|
if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL)
|
|
vtype = "unknown";
|
|
|
|
if (afdata == 0) {
|
|
table_show_tainfo(i, &d, "", vtype);
|
|
} else {
|
|
table_show_tainfo(i, &d, "IPv4 ", vtype);
|
|
memset(&d, 0, sizeof(d));
|
|
d.taclass = tainfo->taclass6;
|
|
if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL)
|
|
vtype = "unknown";
|
|
d.size = tainfo->size6;
|
|
d.count = tainfo->count6;
|
|
d.itemsize = tainfo->itemsize6;
|
|
d.itemsize6 = d.itemsize;
|
|
table_show_tainfo(i, &d, "IPv6 ", vtype);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function wrappers which can be used either
|
|
* as is or as foreach function parameter.
|
|
*/
|
|
|
|
static int
|
|
table_show_one(ipfw_xtable_info *i, void *arg)
|
|
{
|
|
ipfw_obj_header *oh;
|
|
int error;
|
|
|
|
if ((error = table_do_get_list(i, &oh)) != 0) {
|
|
err(EX_OSERR, "Error requesting table %s list", i->tablename);
|
|
return (error);
|
|
}
|
|
|
|
table_show_list(oh, 1);
|
|
|
|
free(oh);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
table_flush_one(ipfw_xtable_info *i, void *arg)
|
|
{
|
|
ipfw_obj_header *oh;
|
|
|
|
oh = (ipfw_obj_header *)arg;
|
|
|
|
table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
|
|
|
|
return (table_flush(oh));
|
|
}
|
|
|
|
static int
|
|
table_do_modify_record(int cmd, ipfw_obj_header *oh,
|
|
ipfw_obj_tentry *tent, int count, int atomic)
|
|
{
|
|
ipfw_obj_ctlv *ctlv;
|
|
ipfw_obj_tentry *tent_base;
|
|
caddr_t pbuf;
|
|
char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)];
|
|
int error, i;
|
|
size_t sz;
|
|
|
|
sz = sizeof(*ctlv) + sizeof(*tent) * count;
|
|
if (count == 1) {
|
|
memset(xbuf, 0, sizeof(xbuf));
|
|
pbuf = xbuf;
|
|
} else {
|
|
if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL)
|
|
return (ENOMEM);
|
|
}
|
|
|
|
memcpy(pbuf, oh, sizeof(*oh));
|
|
oh = (ipfw_obj_header *)pbuf;
|
|
oh->opheader.version = 1;
|
|
|
|
ctlv = (ipfw_obj_ctlv *)(oh + 1);
|
|
ctlv->count = count;
|
|
ctlv->head.length = sz;
|
|
if (atomic != 0)
|
|
ctlv->flags |= IPFW_CTF_ATOMIC;
|
|
|
|
tent_base = tent;
|
|
memcpy(ctlv + 1, tent, sizeof(*tent) * count);
|
|
tent = (ipfw_obj_tentry *)(ctlv + 1);
|
|
for (i = 0; i < count; i++, tent++) {
|
|
tent->head.length = sizeof(ipfw_obj_tentry);
|
|
tent->idx = oh->idx;
|
|
}
|
|
|
|
sz += sizeof(*oh);
|
|
error = do_get3(cmd, &oh->opheader, &sz);
|
|
tent = (ipfw_obj_tentry *)(ctlv + 1);
|
|
/* Copy result back to provided buffer */
|
|
memcpy(tent_base, ctlv + 1, sizeof(*tent) * count);
|
|
|
|
if (pbuf != xbuf)
|
|
free(pbuf);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add,
|
|
int quiet, int update, int atomic)
|
|
{
|
|
ipfw_obj_tentry *ptent, tent, *tent_buf;
|
|
ipfw_xtable_info xi;
|
|
uint8_t type;
|
|
uint32_t vmask;
|
|
int cmd, count, error, i, ignored;
|
|
char *texterr, *etxt, *px;
|
|
|
|
if (ac == 0)
|
|
errx(EX_USAGE, "address required");
|
|
|
|
if (add != 0) {
|
|
cmd = IP_FW_TABLE_XADD;
|
|
texterr = "Adding record failed";
|
|
} else {
|
|
cmd = IP_FW_TABLE_XDEL;
|
|
texterr = "Deleting record failed";
|
|
}
|
|
|
|
/*
|
|
* Calculate number of entries:
|
|
* Assume [key val] x N for add
|
|
* and
|
|
* key x N for delete
|
|
*/
|
|
count = (add != 0) ? ac / 2 + 1 : ac;
|
|
|
|
if (count <= 1) {
|
|
/* Adding single entry with/without value */
|
|
memset(&tent, 0, sizeof(tent));
|
|
tent_buf = &tent;
|
|
} else {
|
|
|
|
if ((tent_buf = calloc(count, sizeof(tent))) == NULL)
|
|
errx(EX_OSERR,
|
|
"Unable to allocate memory for all entries");
|
|
}
|
|
ptent = tent_buf;
|
|
|
|
memset(&xi, 0, sizeof(xi));
|
|
count = 0;
|
|
while (ac > 0) {
|
|
tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi);
|
|
|
|
/*
|
|
* compability layer: auto-create table if not exists
|
|
*/
|
|
if (xi.tablename[0] == '\0') {
|
|
xi.type = type;
|
|
xi.vmask = vmask;
|
|
strlcpy(xi.tablename, oh->ntlv.name,
|
|
sizeof(xi.tablename));
|
|
fprintf(stderr, "DEPRECATED: inserting data info "
|
|
"non-existent table %s. (auto-created)\n",
|
|
xi.tablename);
|
|
table_do_create(oh, &xi);
|
|
}
|
|
|
|
oh->ntlv.type = type;
|
|
ac--; av++;
|
|
|
|
if (add != 0 && ac > 0) {
|
|
tentry_fill_value(oh, ptent, *av, type, vmask);
|
|
ac--; av++;
|
|
}
|
|
|
|
if (update != 0)
|
|
ptent->head.flags |= IPFW_TF_UPDATE;
|
|
|
|
count++;
|
|
ptent++;
|
|
}
|
|
|
|
error = table_do_modify_record(cmd, oh, tent_buf, count, atomic);
|
|
|
|
quiet = 0;
|
|
|
|
/*
|
|
* Compatibility stuff: do not yell on duplicate keys or
|
|
* failed deletions.
|
|
*/
|
|
if (error == 0 || (error == EEXIST && add != 0) ||
|
|
(error == ENOENT && add == 0)) {
|
|
if (quiet != 0) {
|
|
if (tent_buf != &tent)
|
|
free(tent_buf);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Report results back */
|
|
ptent = tent_buf;
|
|
for (i = 0; i < count; ptent++, i++) {
|
|
ignored = 0;
|
|
switch (ptent->result) {
|
|
case IPFW_TR_ADDED:
|
|
px = "added";
|
|
break;
|
|
case IPFW_TR_DELETED:
|
|
px = "deleted";
|
|
break;
|
|
case IPFW_TR_UPDATED:
|
|
px = "updated";
|
|
break;
|
|
case IPFW_TR_LIMIT:
|
|
px = "limit";
|
|
ignored = 1;
|
|
break;
|
|
case IPFW_TR_ERROR:
|
|
px = "error";
|
|
ignored = 1;
|
|
break;
|
|
case IPFW_TR_NOTFOUND:
|
|
px = "notfound";
|
|
ignored = 1;
|
|
break;
|
|
case IPFW_TR_EXISTS:
|
|
px = "exists";
|
|
ignored = 1;
|
|
break;
|
|
case IPFW_TR_IGNORED:
|
|
px = "ignored";
|
|
ignored = 1;
|
|
break;
|
|
default:
|
|
px = "unknown";
|
|
ignored = 1;
|
|
}
|
|
|
|
if (error != 0 && atomic != 0 && ignored == 0)
|
|
printf("%s(reverted): ", px);
|
|
else
|
|
printf("%s: ", px);
|
|
|
|
table_show_entry(&xi, ptent);
|
|
}
|
|
|
|
if (tent_buf != &tent)
|
|
free(tent_buf);
|
|
|
|
if (error == 0)
|
|
return;
|
|
/* Get real OS error */
|
|
error = errno;
|
|
|
|
/* Try to provide more human-readable error */
|
|
switch (error) {
|
|
case EEXIST:
|
|
etxt = "record already exists";
|
|
break;
|
|
case EFBIG:
|
|
etxt = "limit hit";
|
|
break;
|
|
case ESRCH:
|
|
etxt = "table not found";
|
|
break;
|
|
case ENOENT:
|
|
etxt = "record not found";
|
|
break;
|
|
case EACCES:
|
|
etxt = "table is locked";
|
|
break;
|
|
default:
|
|
etxt = strerror(error);
|
|
}
|
|
|
|
errx(EX_OSERR, "%s: %s", texterr, etxt);
|
|
}
|
|
|
|
static int
|
|
table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi,
|
|
ipfw_obj_tentry *xtent)
|
|
{
|
|
char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)];
|
|
ipfw_obj_tentry *tent;
|
|
uint8_t type;
|
|
uint32_t vmask;
|
|
size_t sz;
|
|
|
|
memcpy(xbuf, oh, sizeof(*oh));
|
|
oh = (ipfw_obj_header *)xbuf;
|
|
tent = (ipfw_obj_tentry *)(oh + 1);
|
|
|
|
memset(tent, 0, sizeof(*tent));
|
|
tent->head.length = sizeof(*tent);
|
|
tent->idx = 1;
|
|
|
|
tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi);
|
|
oh->ntlv.type = type;
|
|
|
|
sz = sizeof(xbuf);
|
|
if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0)
|
|
return (errno);
|
|
|
|
if (sz < sizeof(xbuf))
|
|
return (EINVAL);
|
|
|
|
*xtent = *tent;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
table_lookup(ipfw_obj_header *oh, int ac, char *av[])
|
|
{
|
|
ipfw_obj_tentry xtent;
|
|
ipfw_xtable_info xi;
|
|
char key[64];
|
|
int error;
|
|
|
|
if (ac == 0)
|
|
errx(EX_USAGE, "address required");
|
|
|
|
strlcpy(key, *av, sizeof(key));
|
|
|
|
memset(&xi, 0, sizeof(xi));
|
|
error = table_do_lookup(oh, key, &xi, &xtent);
|
|
|
|
switch (error) {
|
|
case 0:
|
|
break;
|
|
case ESRCH:
|
|
errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name);
|
|
case ENOENT:
|
|
errx(EX_UNAVAILABLE, "Entry %s not found", *av);
|
|
case ENOTSUP:
|
|
errx(EX_UNAVAILABLE, "Table %s algo does not support "
|
|
"\"lookup\" method", oh->ntlv.name);
|
|
default:
|
|
err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)");
|
|
}
|
|
|
|
table_show_entry(&xi, &xtent);
|
|
}
|
|
|
|
static void
|
|
tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type,
|
|
uint8_t tflags)
|
|
{
|
|
char *p, *pp;
|
|
int mask, af;
|
|
struct in6_addr *paddr, tmp;
|
|
struct tflow_entry *tfe;
|
|
uint32_t key, *pkey;
|
|
uint16_t port;
|
|
struct protoent *pent;
|
|
struct servent *sent;
|
|
int masklen;
|
|
|
|
masklen = 0;
|
|
af = 0;
|
|
paddr = (struct in6_addr *)&tentry->k;
|
|
|
|
switch (type) {
|
|
case IPFW_TABLE_ADDR:
|
|
/* Remove / if exists */
|
|
if ((p = strchr(arg, '/')) != NULL) {
|
|
*p = '\0';
|
|
mask = atoi(p + 1);
|
|
}
|
|
|
|
if (inet_pton(AF_INET, arg, paddr) == 1) {
|
|
if (p != NULL && mask > 32)
|
|
errx(EX_DATAERR, "bad IPv4 mask width: %s",
|
|
p + 1);
|
|
|
|
masklen = p ? mask : 32;
|
|
af = AF_INET;
|
|
} else if (inet_pton(AF_INET6, arg, paddr) == 1) {
|
|
if (IN6_IS_ADDR_V4COMPAT(paddr))
|
|
errx(EX_DATAERR,
|
|
"Use IPv4 instead of v4-compatible");
|
|
if (p != NULL && mask > 128)
|
|
errx(EX_DATAERR, "bad IPv6 mask width: %s",
|
|
p + 1);
|
|
|
|
masklen = p ? mask : 128;
|
|
af = AF_INET6;
|
|
} else {
|
|
/* Assume FQDN */
|
|
if (lookup_host(arg, (struct in_addr *)paddr) != 0)
|
|
errx(EX_NOHOST, "hostname ``%s'' unknown", arg);
|
|
|
|
masklen = 32;
|
|
type = IPFW_TABLE_ADDR;
|
|
af = AF_INET;
|
|
}
|
|
break;
|
|
case IPFW_TABLE_INTERFACE:
|
|
/* Assume interface name. Copy significant data only */
|
|
mask = MIN(strlen(arg), IF_NAMESIZE - 1);
|
|
memcpy(paddr, arg, mask);
|
|
/* Set mask to exact match */
|
|
masklen = 8 * IF_NAMESIZE;
|
|
break;
|
|
case IPFW_TABLE_NUMBER:
|
|
/* Port or any other key */
|
|
key = strtol(arg, &p, 10);
|
|
if (*p != '\0')
|
|
errx(EX_DATAERR, "Invalid number: %s", arg);
|
|
|
|
pkey = (uint32_t *)paddr;
|
|
*pkey = key;
|
|
masklen = 32;
|
|
break;
|
|
case IPFW_TABLE_FLOW:
|
|
/* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */
|
|
tfe = &tentry->k.flow;
|
|
af = 0;
|
|
|
|
/* Handle <ipv4|ipv6> */
|
|
if ((tflags & IPFW_TFFLAG_SRCIP) != 0) {
|
|
if ((p = strchr(arg, ',')) != NULL)
|
|
*p++ = '\0';
|
|
/* Determine family using temporary storage */
|
|
if (inet_pton(AF_INET, arg, &tmp) == 1) {
|
|
if (af != 0 && af != AF_INET)
|
|
errx(EX_DATAERR,
|
|
"Inconsistent address family\n");
|
|
af = AF_INET;
|
|
memcpy(&tfe->a.a4.sip, &tmp, 4);
|
|
} else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
|
|
if (af != 0 && af != AF_INET6)
|
|
errx(EX_DATAERR,
|
|
"Inconsistent address family\n");
|
|
af = AF_INET6;
|
|
memcpy(&tfe->a.a6.sip6, &tmp, 16);
|
|
}
|
|
|
|
arg = p;
|
|
}
|
|
|
|
/* Handle <proto-num|proto-name> */
|
|
if ((tflags & IPFW_TFFLAG_PROTO) != 0) {
|
|
if (arg == NULL)
|
|
errx(EX_DATAERR, "invalid key: proto missing");
|
|
if ((p = strchr(arg, ',')) != NULL)
|
|
*p++ = '\0';
|
|
|
|
key = strtol(arg, &pp, 10);
|
|
if (*pp != '\0') {
|
|
if ((pent = getprotobyname(arg)) == NULL)
|
|
errx(EX_DATAERR, "Unknown proto: %s",
|
|
arg);
|
|
else
|
|
key = pent->p_proto;
|
|
}
|
|
|
|
if (key > 255)
|
|
errx(EX_DATAERR, "Bad protocol number: %u",key);
|
|
|
|
tfe->proto = key;
|
|
|
|
arg = p;
|
|
}
|
|
|
|
/* Handle <port-num|service-name> */
|
|
if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) {
|
|
if (arg == NULL)
|
|
errx(EX_DATAERR, "invalid key: src port missing");
|
|
if ((p = strchr(arg, ',')) != NULL)
|
|
*p++ = '\0';
|
|
|
|
if ((port = htons(strtol(arg, NULL, 10))) == 0) {
|
|
if ((sent = getservbyname(arg, NULL)) == NULL)
|
|
errx(EX_DATAERR, "Unknown service: %s",
|
|
arg);
|
|
else
|
|
key = sent->s_port;
|
|
}
|
|
|
|
tfe->sport = port;
|
|
|
|
arg = p;
|
|
}
|
|
|
|
/* Handle <ipv4|ipv6>*/
|
|
if ((tflags & IPFW_TFFLAG_DSTIP) != 0) {
|
|
if (arg == NULL)
|
|
errx(EX_DATAERR, "invalid key: dst ip missing");
|
|
if ((p = strchr(arg, ',')) != NULL)
|
|
*p++ = '\0';
|
|
/* Determine family using temporary storage */
|
|
if (inet_pton(AF_INET, arg, &tmp) == 1) {
|
|
if (af != 0 && af != AF_INET)
|
|
errx(EX_DATAERR,
|
|
"Inconsistent address family");
|
|
af = AF_INET;
|
|
memcpy(&tfe->a.a4.dip, &tmp, 4);
|
|
} else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
|
|
if (af != 0 && af != AF_INET6)
|
|
errx(EX_DATAERR,
|
|
"Inconsistent address family");
|
|
af = AF_INET6;
|
|
memcpy(&tfe->a.a6.dip6, &tmp, 16);
|
|
}
|
|
|
|
arg = p;
|
|
}
|
|
|
|
/* Handle <port-num|service-name> */
|
|
if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) {
|
|
if (arg == NULL)
|
|
errx(EX_DATAERR, "invalid key: dst port missing");
|
|
if ((p = strchr(arg, ',')) != NULL)
|
|
*p++ = '\0';
|
|
|
|
if ((port = htons(strtol(arg, NULL, 10))) == 0) {
|
|
if ((sent = getservbyname(arg, NULL)) == NULL)
|
|
errx(EX_DATAERR, "Unknown service: %s",
|
|
arg);
|
|
else
|
|
key = sent->s_port;
|
|
}
|
|
|
|
tfe->dport = port;
|
|
|
|
arg = p;
|
|
}
|
|
|
|
tfe->af = af;
|
|
|
|
break;
|
|
|
|
default:
|
|
errx(EX_DATAERR, "Unsupported table type: %d", type);
|
|
}
|
|
|
|
tentry->subtype = af;
|
|
tentry->masklen = masklen;
|
|
}
|
|
|
|
/*
|
|
* Tries to guess table key type.
|
|
* This procedure is used in legacy table auto-create
|
|
* code AND in `ipfw -n` ruleset checking.
|
|
*
|
|
* Imported from old table_fill_xentry() parse code.
|
|
*/
|
|
static int
|
|
guess_key_type(char *key, uint8_t *ptype)
|
|
{
|
|
char *p;
|
|
struct in6_addr addr;
|
|
uint32_t kv;
|
|
|
|
if (ishexnumber(*key) != 0 || *key == ':') {
|
|
/* Remove / if exists */
|
|
if ((p = strchr(key, '/')) != NULL)
|
|
*p = '\0';
|
|
|
|
if ((inet_pton(AF_INET, key, &addr) == 1) ||
|
|
(inet_pton(AF_INET6, key, &addr) == 1)) {
|
|
*ptype = IPFW_TABLE_CIDR;
|
|
if (p != NULL)
|
|
*p = '/';
|
|
return (0);
|
|
} else {
|
|
/* Port or any other key */
|
|
/* Skip non-base 10 entries like 'fa1' */
|
|
kv = strtol(key, &p, 10);
|
|
if (*p == '\0') {
|
|
*ptype = IPFW_TABLE_NUMBER;
|
|
return (0);
|
|
} else if ((p != key) && (*p == '.')) {
|
|
/*
|
|
* Warn on IPv4 address strings
|
|
* which are "valid" for inet_aton() but not
|
|
* in inet_pton().
|
|
*
|
|
* Typical examples: '10.5' or '10.0.0.05'
|
|
*/
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (strchr(key, '.') == NULL) {
|
|
*ptype = IPFW_TABLE_INTERFACE;
|
|
return (0);
|
|
}
|
|
|
|
if (lookup_host(key, (struct in_addr *)&addr) != 0)
|
|
return (1);
|
|
|
|
*ptype = IPFW_TABLE_CIDR;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key,
|
|
int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi)
|
|
{
|
|
uint8_t type, tflags;
|
|
uint32_t vmask;
|
|
int error;
|
|
|
|
type = 0;
|
|
tflags = 0;
|
|
vmask = 0;
|
|
|
|
if (xi->tablename[0] == '\0')
|
|
error = table_get_info(oh, xi);
|
|
else
|
|
error = 0;
|
|
|
|
if (error == 0) {
|
|
if (co.test_only == 0) {
|
|
/* Table found */
|
|
type = xi->type;
|
|
tflags = xi->tflags;
|
|
vmask = xi->vmask;
|
|
} else {
|
|
/*
|
|
* we're running `ipfw -n`
|
|
* Compability layer: try to guess key type
|
|
* before failing.
|
|
*/
|
|
if (guess_key_type(key, &type) != 0) {
|
|
/* Inknown key */
|
|
errx(EX_USAGE, "Cannot guess "
|
|
"key '%s' type", key);
|
|
}
|
|
vmask = IPFW_VTYPE_LEGACY;
|
|
}
|
|
} else {
|
|
if (error != ESRCH)
|
|
errx(EX_OSERR, "Error requesting table %s info",
|
|
oh->ntlv.name);
|
|
if (add == 0)
|
|
errx(EX_DATAERR, "Table %s does not exist",
|
|
oh->ntlv.name);
|
|
/*
|
|
* Table does not exist
|
|
* Compability layer: try to guess key type before failing.
|
|
*/
|
|
if (guess_key_type(key, &type) != 0) {
|
|
/* Inknown key */
|
|
errx(EX_USAGE, "Table %s does not exist, cannot guess "
|
|
"key '%s' type", oh->ntlv.name, key);
|
|
}
|
|
|
|
vmask = IPFW_VTYPE_LEGACY;
|
|
}
|
|
|
|
tentry_fill_key_type(key, tent, type, tflags);
|
|
|
|
*ptype = type;
|
|
*pvmask = vmask;
|
|
}
|
|
|
|
static void
|
|
set_legacy_value(uint32_t val, ipfw_table_value *v)
|
|
{
|
|
v->tag = val;
|
|
v->pipe = val;
|
|
v->divert = val;
|
|
v->skipto = val;
|
|
v->netgraph = val;
|
|
v->fib = val;
|
|
v->nat = val;
|
|
v->nh4 = val;
|
|
v->dscp = (uint8_t)val;
|
|
v->limit = val;
|
|
}
|
|
|
|
static void
|
|
tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg,
|
|
uint8_t type, uint32_t vmask)
|
|
{
|
|
struct addrinfo hints, *res;
|
|
uint32_t a4, flag, val, vm;
|
|
ipfw_table_value *v;
|
|
uint32_t i;
|
|
int dval;
|
|
char *comma, *e, *etype, *n, *p;
|
|
|
|
v = &tent->v.value;
|
|
vm = vmask;
|
|
|
|
/* Compat layer: keep old behavior for legacy value types */
|
|
if (vmask == IPFW_VTYPE_LEGACY) {
|
|
/* Try to interpret as number first */
|
|
val = strtoul(arg, &p, 0);
|
|
if (*p == '\0') {
|
|
set_legacy_value(val, v);
|
|
return;
|
|
}
|
|
if (inet_pton(AF_INET, arg, &val) == 1) {
|
|
set_legacy_value(ntohl(val), v);
|
|
return;
|
|
}
|
|
/* Try hostname */
|
|
if (lookup_host(arg, (struct in_addr *)&val) == 0) {
|
|
set_legacy_value(val, v);
|
|
return;
|
|
}
|
|
errx(EX_OSERR, "Unable to parse value %s", arg);
|
|
}
|
|
|
|
/*
|
|
* Shorthands: handle single value if vmask consists
|
|
* of numbers only. e.g.:
|
|
* vmask = "fib,skipto" -> treat input "1" as "1,1"
|
|
*/
|
|
|
|
n = arg;
|
|
etype = NULL;
|
|
for (i = 1; i < (1 << 31); i *= 2) {
|
|
if ((flag = (vmask & i)) == 0)
|
|
continue;
|
|
vmask &= ~flag;
|
|
|
|
if ((comma = strchr(n, ',')) != NULL)
|
|
*comma = '\0';
|
|
|
|
switch (flag) {
|
|
case IPFW_VTYPE_TAG:
|
|
v->tag = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "tag";
|
|
break;
|
|
case IPFW_VTYPE_PIPE:
|
|
v->pipe = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "pipe";
|
|
break;
|
|
case IPFW_VTYPE_DIVERT:
|
|
v->divert = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "divert";
|
|
break;
|
|
case IPFW_VTYPE_SKIPTO:
|
|
v->skipto = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "skipto";
|
|
break;
|
|
case IPFW_VTYPE_NETGRAPH:
|
|
v->netgraph = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "netgraph";
|
|
break;
|
|
case IPFW_VTYPE_FIB:
|
|
v->fib = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "fib";
|
|
break;
|
|
case IPFW_VTYPE_NAT:
|
|
v->nat = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "nat";
|
|
break;
|
|
case IPFW_VTYPE_LIMIT:
|
|
v->limit = strtol(n, &e, 10);
|
|
if (*e != '\0')
|
|
etype = "limit";
|
|
break;
|
|
case IPFW_VTYPE_NH4:
|
|
if (strchr(n, '.') != NULL &&
|
|
inet_pton(AF_INET, n, &a4) == 1) {
|
|
v->nh4 = ntohl(a4);
|
|
break;
|
|
}
|
|
if (lookup_host(n, (struct in_addr *)&v->nh4) == 0)
|
|
break;
|
|
etype = "ipv4";
|
|
break;
|
|
case IPFW_VTYPE_DSCP:
|
|
if (isalpha(*n)) {
|
|
if ((dval = match_token(f_ipdscp, n)) != -1) {
|
|
v->dscp = dval;
|
|
break;
|
|
} else
|
|
etype = "DSCP code";
|
|
} else {
|
|
v->dscp = strtol(n, &e, 10);
|
|
if (v->dscp > 63 || *e != '\0')
|
|
etype = "DSCP value";
|
|
}
|
|
break;
|
|
case IPFW_VTYPE_NH6:
|
|
if (strchr(n, ':') != NULL) {
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
if (getaddrinfo(n, NULL, &hints, &res) == 0) {
|
|
v->nh6 = ((struct sockaddr_in6 *)
|
|
res->ai_addr)->sin6_addr;
|
|
v->zoneid = ((struct sockaddr_in6 *)
|
|
res->ai_addr)->sin6_scope_id;
|
|
freeaddrinfo(res);
|
|
break;
|
|
}
|
|
}
|
|
etype = "ipv6";
|
|
break;
|
|
}
|
|
|
|
if (etype != NULL)
|
|
errx(EX_USAGE, "Unable to parse %s as %s", n, etype);
|
|
|
|
if (comma != NULL)
|
|
*comma++ = ',';
|
|
|
|
if ((n = comma) != NULL)
|
|
continue;
|
|
|
|
/* End of input. */
|
|
if (vmask != 0)
|
|
errx(EX_USAGE, "Not enough fields inside value");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compare table names.
|
|
* Honor number comparison.
|
|
*/
|
|
static int
|
|
tablename_cmp(const void *a, const void *b)
|
|
{
|
|
ipfw_xtable_info *ia, *ib;
|
|
|
|
ia = (ipfw_xtable_info *)a;
|
|
ib = (ipfw_xtable_info *)b;
|
|
|
|
return (stringnum_cmp(ia->tablename, ib->tablename));
|
|
}
|
|
|
|
/*
|
|
* Retrieves table list from kernel,
|
|
* optionally sorts it and calls requested function for each table.
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
tables_foreach(table_cb_t *f, void *arg, int sort)
|
|
{
|
|
ipfw_obj_lheader *olh;
|
|
ipfw_xtable_info *info;
|
|
size_t sz;
|
|
int i, error;
|
|
|
|
/* Start with reasonable default */
|
|
sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info);
|
|
|
|
for (;;) {
|
|
if ((olh = calloc(1, sz)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
olh->size = sz;
|
|
if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) {
|
|
sz = olh->size;
|
|
free(olh);
|
|
if (errno != ENOMEM)
|
|
return (errno);
|
|
continue;
|
|
}
|
|
|
|
if (sort != 0)
|
|
qsort(olh + 1, olh->count, olh->objsize, tablename_cmp);
|
|
|
|
info = (ipfw_xtable_info *)(olh + 1);
|
|
for (i = 0; i < olh->count; i++) {
|
|
error = f(info, arg); /* Ignore errors for now */
|
|
info = (ipfw_xtable_info *)((caddr_t)info + olh->objsize);
|
|
}
|
|
|
|
free(olh);
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Retrieves all entries for given table @i in
|
|
* eXtended format. Allocate buffer large enough
|
|
* to store result. Called needs to free it later.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh)
|
|
{
|
|
ipfw_obj_header *oh;
|
|
size_t sz;
|
|
int c;
|
|
|
|
sz = 0;
|
|
oh = NULL;
|
|
for (c = 0; c < 8; c++) {
|
|
if (sz < i->size)
|
|
sz = i->size + 44;
|
|
if (oh != NULL)
|
|
free(oh);
|
|
if ((oh = calloc(1, sz)) == NULL)
|
|
continue;
|
|
table_fill_objheader(oh, i);
|
|
oh->opheader.version = 1; /* Current version */
|
|
if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) {
|
|
*poh = oh;
|
|
return (0);
|
|
}
|
|
|
|
if (errno != ENOMEM)
|
|
break;
|
|
}
|
|
free(oh);
|
|
|
|
return (errno);
|
|
}
|
|
|
|
/*
|
|
* Shows all entries from @oh in human-readable format
|
|
*/
|
|
static void
|
|
table_show_list(ipfw_obj_header *oh, int need_header)
|
|
{
|
|
ipfw_obj_tentry *tent;
|
|
uint32_t count;
|
|
ipfw_xtable_info *i;
|
|
|
|
i = (ipfw_xtable_info *)(oh + 1);
|
|
tent = (ipfw_obj_tentry *)(i + 1);
|
|
|
|
if (need_header)
|
|
printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
|
|
|
|
count = i->count;
|
|
while (count > 0) {
|
|
table_show_entry(i, tent);
|
|
tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length);
|
|
count--;
|
|
}
|
|
}
|
|
|
|
static void
|
|
table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
|
|
uint32_t vmask, int print_ip)
|
|
{
|
|
char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
|
|
struct sockaddr_in6 sa6;
|
|
uint32_t flag, i, l;
|
|
size_t sz;
|
|
struct in_addr a4;
|
|
|
|
sz = bufsize;
|
|
|
|
/*
|
|
* Some shorthands for printing values:
|
|
* legacy assumes all values are equal, so keep the first one.
|
|
*/
|
|
if (vmask == IPFW_VTYPE_LEGACY) {
|
|
if (print_ip != 0) {
|
|
flag = htonl(v->tag);
|
|
inet_ntop(AF_INET, &flag, buf, sz);
|
|
} else
|
|
snprintf(buf, sz, "%u", v->tag);
|
|
return;
|
|
}
|
|
|
|
for (i = 1; i < (1 << 31); i *= 2) {
|
|
if ((flag = (vmask & i)) == 0)
|
|
continue;
|
|
l = 0;
|
|
|
|
switch (flag) {
|
|
case IPFW_VTYPE_TAG:
|
|
l = snprintf(buf, sz, "%u,", v->tag);
|
|
break;
|
|
case IPFW_VTYPE_PIPE:
|
|
l = snprintf(buf, sz, "%u,", v->pipe);
|
|
break;
|
|
case IPFW_VTYPE_DIVERT:
|
|
l = snprintf(buf, sz, "%d,", v->divert);
|
|
break;
|
|
case IPFW_VTYPE_SKIPTO:
|
|
l = snprintf(buf, sz, "%d,", v->skipto);
|
|
break;
|
|
case IPFW_VTYPE_NETGRAPH:
|
|
l = snprintf(buf, sz, "%u,", v->netgraph);
|
|
break;
|
|
case IPFW_VTYPE_FIB:
|
|
l = snprintf(buf, sz, "%u,", v->fib);
|
|
break;
|
|
case IPFW_VTYPE_NAT:
|
|
l = snprintf(buf, sz, "%u,", v->nat);
|
|
break;
|
|
case IPFW_VTYPE_LIMIT:
|
|
l = snprintf(buf, sz, "%u,", v->limit);
|
|
break;
|
|
case IPFW_VTYPE_NH4:
|
|
a4.s_addr = htonl(v->nh4);
|
|
inet_ntop(AF_INET, &a4, abuf, sizeof(abuf));
|
|
l = snprintf(buf, sz, "%s,", abuf);
|
|
break;
|
|
case IPFW_VTYPE_DSCP:
|
|
l = snprintf(buf, sz, "%d,", v->dscp);
|
|
break;
|
|
case IPFW_VTYPE_NH6:
|
|
sa6.sin6_family = AF_INET6;
|
|
sa6.sin6_len = sizeof(sa6);
|
|
sa6.sin6_addr = v->nh6;
|
|
sa6.sin6_port = 0;
|
|
sa6.sin6_scope_id = v->zoneid;
|
|
if (getnameinfo((const struct sockaddr *)&sa6,
|
|
sa6.sin6_len, abuf, sizeof(abuf), NULL, 0,
|
|
NI_NUMERICHOST) == 0)
|
|
l = snprintf(buf, sz, "%s,", abuf);
|
|
break;
|
|
}
|
|
|
|
buf += l;
|
|
sz -= l;
|
|
}
|
|
|
|
if (sz != bufsize)
|
|
*(buf - 1) = '\0';
|
|
}
|
|
|
|
static void
|
|
table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent)
|
|
{
|
|
char *comma, tbuf[128], pval[128];
|
|
void *paddr;
|
|
struct tflow_entry *tfe;
|
|
|
|
table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask,
|
|
co.do_value_as_ip);
|
|
|
|
switch (i->type) {
|
|
case IPFW_TABLE_ADDR:
|
|
/* IPv4 or IPv6 prefixes */
|
|
inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf));
|
|
printf("%s/%u %s\n", tbuf, tent->masklen, pval);
|
|
break;
|
|
case IPFW_TABLE_INTERFACE:
|
|
/* Interface names */
|
|
printf("%s %s\n", tent->k.iface, pval);
|
|
break;
|
|
case IPFW_TABLE_NUMBER:
|
|
/* numbers */
|
|
printf("%u %s\n", tent->k.key, pval);
|
|
break;
|
|
case IPFW_TABLE_FLOW:
|
|
/* flows */
|
|
tfe = &tent->k.flow;
|
|
comma = "";
|
|
|
|
if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) {
|
|
if (tfe->af == AF_INET)
|
|
paddr = &tfe->a.a4.sip;
|
|
else
|
|
paddr = &tfe->a.a6.sip6;
|
|
|
|
inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
|
|
printf("%s%s", comma, tbuf);
|
|
comma = ",";
|
|
}
|
|
|
|
if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) {
|
|
printf("%s%d", comma, tfe->proto);
|
|
comma = ",";
|
|
}
|
|
|
|
if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) {
|
|
printf("%s%d", comma, ntohs(tfe->sport));
|
|
comma = ",";
|
|
}
|
|
if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) {
|
|
if (tfe->af == AF_INET)
|
|
paddr = &tfe->a.a4.dip;
|
|
else
|
|
paddr = &tfe->a.a6.dip6;
|
|
|
|
inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
|
|
printf("%s%s", comma, tbuf);
|
|
comma = ",";
|
|
}
|
|
|
|
if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) {
|
|
printf("%s%d", comma, ntohs(tfe->dport));
|
|
comma = ",";
|
|
}
|
|
|
|
printf(" %s\n", pval);
|
|
}
|
|
}
|
|
|
|
static int
|
|
table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh)
|
|
{
|
|
ipfw_obj_lheader req, *olh;
|
|
size_t sz;
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
sz = sizeof(req);
|
|
|
|
if (do_get3(opcode, &req.opheader, &sz) != 0)
|
|
if (errno != ENOMEM)
|
|
return (errno);
|
|
|
|
sz = req.size;
|
|
if ((olh = calloc(1, sz)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
olh->size = sz;
|
|
if (do_get3(opcode, &olh->opheader, &sz) != 0) {
|
|
free(olh);
|
|
return (errno);
|
|
}
|
|
|
|
*polh = olh;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
table_do_get_algolist(ipfw_obj_lheader **polh)
|
|
{
|
|
|
|
return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh));
|
|
}
|
|
|
|
static int
|
|
table_do_get_vlist(ipfw_obj_lheader **polh)
|
|
{
|
|
|
|
return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh));
|
|
}
|
|
|
|
void
|
|
ipfw_list_ta(int ac, char *av[])
|
|
{
|
|
ipfw_obj_lheader *olh;
|
|
ipfw_ta_info *info;
|
|
int error, i;
|
|
const char *atype;
|
|
|
|
error = table_do_get_algolist(&olh);
|
|
if (error != 0)
|
|
err(EX_OSERR, "Unable to request algorithm list");
|
|
|
|
info = (ipfw_ta_info *)(olh + 1);
|
|
for (i = 0; i < olh->count; i++) {
|
|
if ((atype = match_value(tabletypes, info->type)) == NULL)
|
|
atype = "unknown";
|
|
printf("--- %s ---\n", info->algoname);
|
|
printf(" type: %s\n refcount: %u\n", atype, info->refcnt);
|
|
|
|
info = (ipfw_ta_info *)((caddr_t)info + olh->objsize);
|
|
}
|
|
|
|
free(olh);
|
|
}
|
|
|
|
|
|
/* Copy of current kernel table_value structure */
|
|
struct _table_value {
|
|
uint32_t tag; /* O_TAG/O_TAGGED */
|
|
uint32_t pipe; /* O_PIPE/O_QUEUE */
|
|
uint16_t divert; /* O_DIVERT/O_TEE */
|
|
uint16_t skipto; /* skipto, CALLRET */
|
|
uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */
|
|
uint32_t fib; /* O_SETFIB */
|
|
uint32_t nat; /* O_NAT */
|
|
uint32_t nh4;
|
|
uint8_t dscp;
|
|
uint8_t spare0;
|
|
uint16_t spare1;
|
|
/* -- 32 bytes -- */
|
|
struct in6_addr nh6;
|
|
uint32_t limit; /* O_LIMIT */
|
|
uint32_t zoneid;
|
|
uint64_t refcnt; /* Number of references */
|
|
};
|
|
|
|
int
|
|
compare_values(const void *_a, const void *_b)
|
|
{
|
|
struct _table_value *a, *b;
|
|
|
|
a = (struct _table_value *)_a;
|
|
b = (struct _table_value *)_b;
|
|
|
|
if (a->spare1 < b->spare1)
|
|
return (-1);
|
|
else if (a->spare1 > b->spare1)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
ipfw_list_values(int ac, char *av[])
|
|
{
|
|
ipfw_obj_lheader *olh;
|
|
struct _table_value *v;
|
|
int error, i;
|
|
uint32_t vmask;
|
|
char buf[128];
|
|
|
|
error = table_do_get_vlist(&olh);
|
|
if (error != 0)
|
|
err(EX_OSERR, "Unable to request value list");
|
|
|
|
vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */
|
|
|
|
table_print_valheader(buf, sizeof(buf), vmask);
|
|
printf("HEADER: %s\n", buf);
|
|
v = (struct _table_value *)(olh + 1);
|
|
qsort(v, olh->count, olh->objsize, compare_values);
|
|
for (i = 0; i < olh->count; i++) {
|
|
table_show_value(buf, sizeof(buf), (ipfw_table_value *)v,
|
|
vmask, 0);
|
|
printf("[%u] refs=%lu %s\n", v->spare1, (u_long)v->refcnt, buf);
|
|
v = (struct _table_value *)((caddr_t)v + olh->objsize);
|
|
}
|
|
|
|
free(olh);
|
|
}
|
|
|
|
int
|
|
table_check_name(char *tablename)
|
|
{
|
|
int c, i, l;
|
|
|
|
/*
|
|
* Check if tablename is null-terminated and contains
|
|
* valid symbols only. Valid mask is:
|
|
* [a-zA-Z0-9\-_\.]{1,63}
|
|
*/
|
|
l = strlen(tablename);
|
|
if (l == 0 || l >= 64)
|
|
return (EINVAL);
|
|
for (i = 0; i < l; i++) {
|
|
c = tablename[i];
|
|
if (isalpha(c) || isdigit(c) || c == '_' ||
|
|
c == '-' || c == '.')
|
|
continue;
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* Restrict some 'special' names */
|
|
if (strcmp(tablename, "all") == 0)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|