4c0c07a552
Kernel changes: * Add TEI_FLAGS_DONTADD entry flag to indicate that insert is not possible * Support given flag in all algorithms * Add "limit" field to ipfw_xtable_info * Add actual limiting code into add_table_entry() Userland changes: * Add "limit" option as "create" table sub-option. Limit modification is currently impossible. * Print human-readable errors in table enry addition/deletion code.
1311 lines
28 KiB
C
1311 lines
28 KiB
C
/*
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* Copyright (c) 2002-2003 Luigi Rizzo
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* Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
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* Copyright (c) 1994 Ugen J.S.Antsilevich
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*
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* Idea and grammar partially left from:
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* Copyright (c) 1993 Daniel Boulet
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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 tables support
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*
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* $FreeBSD: projects/ipfw/sbin/ipfw/ipfw2.c 267467 2014-06-14 10:58:39Z melifaro $
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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 <stddef.h> /* offsetof */
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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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#define IPFW_INTERNAL /* Access to protected structures in ip_fw.h. */
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/route.h> /* def. of struct route */
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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 <alias.h>
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#include "ipfw2.h"
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static void table_list(ipfw_xtable_info *i, int need_header);
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static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[],
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int add, int update);
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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 void table_create(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 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_get_list(ipfw_xtable_info *i, ipfw_obj_header *oh);
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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, uint8_t *ptype, uint8_t *pvtype, 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, uint8_t vtype);
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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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{ "cidr", IPFW_TABLE_CIDR },
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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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{ "dscp", IPFW_VTYPE_DSCP },
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{ "ip", IPFW_VTYPE_IP },
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{ "number", IPFW_VTYPE_U32 },
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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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{ "create", TOK_CREATE },
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{ "delete", TOK_DEL },
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{ "destroy", TOK_DESTROY },
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{ "flush", TOK_FLUSH },
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{ "info", TOK_INFO },
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{ "list", TOK_LIST },
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{ "lookup", TOK_LOOKUP },
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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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/*
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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 destroy
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* ipfw table NAME add addr[/masklen] [value]
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* ipfw table NAME delete addr[/masklen]
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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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*/
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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 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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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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if ((tcmd = match_token(tablecmds, *av)) == -1)
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errx(EX_USAGE, "invalid table command %s", *av);
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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_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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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_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_INFO:
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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, NULL);
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} else {
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error = tables_foreach(table_show_info, 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_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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{ 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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uint8_t fset, fclear;
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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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fill_flags(flowtypecmds, p, &fset,
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&fclear);
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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 { cidr | iface | u32 } ]
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* [ valtype { number | ip | dscp } ]
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* [ algo algoname ]
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*
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* Request: [ ipfw_obj_header ipfw_xtable_info ]
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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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size_t sz;
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char *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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/* Set some defaults to preserve compability */
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xi.type = IPFW_TABLE_CIDR;
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xi.vtype = IPFW_VTYPE_U32;
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while (ac > 0) {
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if ((tcmd = match_token(tablenewcmds, *av)) == -1)
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errx(EX_USAGE, "unknown option: %s", *av);
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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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val = match_token(tablevaltypes, *av);
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if (val != -1) {
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xi.vtype = val;
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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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*av, 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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}
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}
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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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* Destroys given table specified by @oh->ntlv.
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* Returns 0 on success.
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*/
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static int
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table_destroy(ipfw_obj_header *oh)
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{
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if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0)
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return (-1);
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return (0);
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}
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|
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/*
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* Flushes given table specified by @oh->ntlv.
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* Returns 0 on success.
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*/
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static int
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table_flush(ipfw_obj_header *oh)
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{
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|
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if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0)
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return (-1);
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|
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return (0);
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}
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|
|
/*
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* Retrieves table in given table specified by @oh->ntlv.
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* it inside @i.
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* Returns 0 on success.
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*/
|
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static int
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table_get_info(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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size_t sz;
|
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sz = sizeof(tbuf);
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memset(tbuf, 0, sizeof(tbuf));
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memcpy(tbuf, oh, sizeof(*oh));
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oh = (ipfw_obj_header *)tbuf;
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|
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if ((error = do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz)) != 0)
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return (error);
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|
|
if (sz < sizeof(tbuf))
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return (EINVAL);
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|
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*i = *(ipfw_xtable_info *)(oh + 1);
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|
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return (0);
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}
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|
|
|
/*
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* Prints table info struct @i in human-readable form.
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|
*/
|
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static int
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table_show_info(ipfw_xtable_info *i, void *arg)
|
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{
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const char *vtype;
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char ttype[64];
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table_print_type(ttype, sizeof(ttype), i->type, i->tflags);
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if ((vtype = match_value(tablevaltypes, i->vtype)) == NULL)
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vtype = "unknown";
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|
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printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
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printf(" kindex: %d, type: %s\n", i->kidx, ttype);
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printf(" valtype: %s, references: %u\n", vtype, i->refcnt);
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printf(" algorithm: %s\n", i->algoname);
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printf(" items: %u, size: %u\n", i->count, i->size);
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if (i->limit > 0)
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printf(" limit: %u\n", i->limit);
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|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function wrappers which can be used either
|
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* as is or as foreach function parameter.
|
|
*/
|
|
|
|
static int
|
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table_show_one(ipfw_xtable_info *i, void *arg)
|
|
{
|
|
ipfw_obj_header *oh;
|
|
int error;
|
|
|
|
if ((oh = calloc(1, i->size)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
if ((error = table_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 update)
|
|
{
|
|
ipfw_obj_ctlv *ctlv;
|
|
char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)];
|
|
int error;
|
|
|
|
memset(xbuf, 0, sizeof(xbuf));
|
|
memcpy(xbuf, oh, sizeof(*oh));
|
|
oh = (ipfw_obj_header *)xbuf;
|
|
oh->opheader.version = 1;
|
|
|
|
ctlv = (ipfw_obj_ctlv *)(oh + 1);
|
|
ctlv->count = 1;
|
|
ctlv->head.length = sizeof(*ctlv) + sizeof(*tent);
|
|
|
|
memcpy(ctlv + 1, tent, sizeof(*tent));
|
|
tent = (ipfw_obj_tentry *)(ctlv + 1);
|
|
if (update != 0)
|
|
tent->head.flags |= IPFW_TF_UPDATE;
|
|
tent->head.length = sizeof(ipfw_obj_tentry);
|
|
|
|
error = do_set3(cmd, &oh->opheader, sizeof(xbuf));
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add, int update)
|
|
{
|
|
ipfw_obj_tentry tent;
|
|
ipfw_xtable_info xi;
|
|
uint8_t type, vtype;
|
|
int cmd, error;
|
|
char *texterr, *etxt;
|
|
|
|
if (ac == 0)
|
|
errx(EX_USAGE, "address required");
|
|
|
|
memset(&tent, 0, sizeof(tent));
|
|
tent.head.length = sizeof(tent);
|
|
tent.idx = 1;
|
|
|
|
tentry_fill_key(oh, &tent, *av, &type, &vtype, &xi);
|
|
|
|
/*
|
|
* compability layer: auto-create table if not exists
|
|
*/
|
|
if (xi.tablename[0] == '\0') {
|
|
xi.type = type;
|
|
xi.vtype = vtype;
|
|
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) {
|
|
if (ac > 0)
|
|
tentry_fill_value(oh, &tent, *av, type, vtype);
|
|
cmd = IP_FW_TABLE_XADD;
|
|
texterr = "Adding record failed";
|
|
} else {
|
|
cmd = IP_FW_TABLE_XDEL;
|
|
texterr = "Deleting record failed";
|
|
}
|
|
|
|
if ((error = table_do_modify_record(cmd, oh, &tent, update)) == 0)
|
|
return;
|
|
|
|
/* 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;
|
|
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, vtype;
|
|
int error;
|
|
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, &type, &vtype, xi);
|
|
oh->ntlv.type = type;
|
|
|
|
sz = sizeof(xbuf);
|
|
if ((error = do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz)) != 0)
|
|
return (error);
|
|
|
|
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));
|
|
|
|
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_CIDR:
|
|
/* 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_CIDR;
|
|
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 ((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 ((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 ((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 ((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;
|
|
}
|
|
|
|
static void
|
|
tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key,
|
|
uint8_t *ptype, uint8_t *pvtype, ipfw_xtable_info *xi)
|
|
{
|
|
uint8_t type, tflags, vtype;
|
|
int error;
|
|
char *del;
|
|
|
|
type = 0;
|
|
tflags = 0;
|
|
vtype = 0;
|
|
|
|
error = table_get_info(oh, xi);
|
|
|
|
if (error == 0) {
|
|
/* Table found. */
|
|
type = xi->type;
|
|
tflags = xi->tflags;
|
|
vtype = xi->vtype;
|
|
} else {
|
|
if (error != ESRCH)
|
|
errx(EX_OSERR, "Error requesting table %s info",
|
|
oh->ntlv.name);
|
|
/*
|
|
* Table does not exist.
|
|
* Compability layer: try to interpret data as CIDR
|
|
* before failing.
|
|
*/
|
|
if ((del = strchr(key, '/')) != NULL)
|
|
*del = '\0';
|
|
if (inet_pton(AF_INET, key, &tent->k.addr6) == 1 ||
|
|
inet_pton(AF_INET6, key, &tent->k.addr6) == 1) {
|
|
/* OK Prepare and send */
|
|
type = IPFW_TABLE_CIDR;
|
|
/*
|
|
* XXX: Value type is forced to be u32.
|
|
* This should be changed for MFC.
|
|
*/
|
|
vtype = IPFW_VTYPE_U32;
|
|
} else {
|
|
/* Inknown key */
|
|
errx(EX_USAGE, "Table %s does not exist, cannot guess "
|
|
"key '%s' type", oh->ntlv.name, key);
|
|
}
|
|
if (del != NULL)
|
|
*del = '/';
|
|
}
|
|
|
|
tentry_fill_key_type(key, tent, type, tflags);
|
|
|
|
*ptype = type;
|
|
*pvtype = vtype;
|
|
}
|
|
|
|
static void
|
|
tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *arg,
|
|
uint8_t type, uint8_t vtype)
|
|
{
|
|
int code;
|
|
char *p;
|
|
|
|
switch (vtype) {
|
|
case IPFW_VTYPE_U32:
|
|
tent->value = strtoul(arg, &p, 0);
|
|
if (*p != '\0')
|
|
errx(EX_USAGE, "Invalid number: %s", arg);
|
|
break;
|
|
case IPFW_VTYPE_IP:
|
|
if (inet_pton(AF_INET, arg, &tent->value) == 1)
|
|
break;
|
|
/* Try hostname */
|
|
if (lookup_host(arg, (struct in_addr *)&tent->value) != 0)
|
|
errx(EX_USAGE, "Invalid IPv4 address: %s", arg);
|
|
break;
|
|
case IPFW_VTYPE_DSCP:
|
|
if (isalpha(*arg)) {
|
|
if ((code = match_token(f_ipdscp, arg)) == -1)
|
|
errx(EX_DATAERR, "Unknown DSCP code");
|
|
} else {
|
|
code = strtoul(arg, NULL, 10);
|
|
if (code < 0 || code > 63)
|
|
errx(EX_DATAERR, "Invalid DSCP value");
|
|
}
|
|
tent->value = code;
|
|
break;
|
|
default:
|
|
errx(EX_OSERR, "Unsupported format type %d", vtype);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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 req, *olh;
|
|
ipfw_xtable_info *info;
|
|
size_t sz;
|
|
int i, error;
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
sz = sizeof(req);
|
|
|
|
if ((error = do_get3(IP_FW_TABLES_XGETSIZE, &req.opheader, &sz)) != 0)
|
|
return (errno);
|
|
|
|
sz = req.size;
|
|
if ((olh = calloc(1, sz)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
olh->size = sz;
|
|
if ((error = do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz)) != 0) {
|
|
free(olh);
|
|
return (errno);
|
|
}
|
|
|
|
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);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Retrieves all entries for given table @i in
|
|
* eXtended format. Assumes buffer of size
|
|
* @i->size has already been allocated by caller.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
static int
|
|
table_get_list(ipfw_xtable_info *i, ipfw_obj_header *oh)
|
|
{
|
|
size_t sz;
|
|
int error, c;
|
|
|
|
sz = 0;
|
|
for (c = 0; c < 3; c++) {
|
|
table_fill_objheader(oh, i);
|
|
if (sz < i->size)
|
|
sz = i->size;
|
|
|
|
oh->opheader.version = 1; /* Current version */
|
|
error = do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz);
|
|
|
|
if (error != ENOMEM)
|
|
return (errno);
|
|
}
|
|
|
|
return (ENOMEM);
|
|
}
|
|
|
|
/*
|
|
* 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_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent)
|
|
{
|
|
char *comma, tbuf[128], pval[32];
|
|
void *paddr;
|
|
uint32_t tval;
|
|
struct tflow_entry *tfe;
|
|
|
|
tval = tent->value;
|
|
|
|
if (co.do_value_as_ip) {
|
|
tval = htonl(tval);
|
|
inet_ntop(AF_INET, &tval, pval, sizeof(pval));
|
|
} else
|
|
snprintf(pval, sizeof(pval), "%u", tval);
|
|
|
|
switch (i->type) {
|
|
case IPFW_TABLE_CIDR:
|
|
/* 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_algolist(ipfw_obj_lheader **polh)
|
|
{
|
|
ipfw_obj_lheader req, *olh;
|
|
size_t sz;
|
|
int error;
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
sz = sizeof(req);
|
|
|
|
error = do_get3(IP_FW_TABLES_ALIST, &req.opheader, &sz);
|
|
if (error != 0 && error != ENOMEM)
|
|
return (error);
|
|
|
|
sz = req.size;
|
|
if ((olh = calloc(1, sz)) == NULL)
|
|
return (ENOMEM);
|
|
|
|
olh->size = sz;
|
|
if ((error = do_get3(IP_FW_TABLES_ALIST, &olh->opheader, &sz)) != 0) {
|
|
free(olh);
|
|
return (error);
|
|
}
|
|
|
|
*polh = olh;
|
|
return (0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
int
|
|
compare_ntlv(const void *_a, const void *_b)
|
|
{
|
|
ipfw_obj_ntlv *a, *b;
|
|
|
|
a = (ipfw_obj_ntlv *)_a;
|
|
b = (ipfw_obj_ntlv *)_b;
|
|
|
|
if (a->set < b->set)
|
|
return (-1);
|
|
else if (a->set > b->set)
|
|
return (1);
|
|
|
|
if (a->idx < b->idx)
|
|
return (-1);
|
|
else if (a->idx > b->idx)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
compare_kntlv(const void *k, const void *v)
|
|
{
|
|
ipfw_obj_ntlv *ntlv;
|
|
uint16_t key;
|
|
|
|
key = *((uint16_t *)k);
|
|
ntlv = (ipfw_obj_ntlv *)v;
|
|
|
|
if (key < ntlv->idx)
|
|
return (-1);
|
|
else if (key > ntlv->idx)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Finds table name in @ctlv by @idx.
|
|
* Uses the following facts:
|
|
* 1) All TLVs are the same size
|
|
* 2) Kernel implementation provides already sorted list.
|
|
*
|
|
* Returns table name or NULL.
|
|
*/
|
|
char *
|
|
table_search_ctlv(ipfw_obj_ctlv *ctlv, uint16_t idx)
|
|
{
|
|
ipfw_obj_ntlv *ntlv;
|
|
|
|
ntlv = bsearch(&idx, (ctlv + 1), ctlv->count, ctlv->objsize,
|
|
compare_kntlv);
|
|
|
|
if (ntlv != 0)
|
|
return (ntlv->name);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
table_sort_ctlv(ipfw_obj_ctlv *ctlv)
|
|
{
|
|
|
|
qsort(ctlv + 1, ctlv->count, ctlv->objsize, compare_ntlv);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|