diff options
30 files changed, 3825 insertions, 33 deletions
diff --git a/Makefile.am b/Makefile.am index 275ebc35..044f6461 100644 --- a/Makefile.am +++ b/Makefile.am @@ -16,6 +16,11 @@ SUBDIRS += extensions # Depends on extensions/libext.a: SUBDIRS += iptables +if ENABLE_NFTABLES +confdir = $(sysconfdir) +dist_conf_DATA = etc/ethertypes +endif + .PHONY: tarball tarball: rm -Rf /tmp/${PACKAGE_TARNAME}-${PACKAGE_VERSION}; diff --git a/etc/ethertypes b/etc/ethertypes new file mode 100644 index 00000000..813177b7 --- /dev/null +++ b/etc/ethertypes @@ -0,0 +1,39 @@ +# +# Ethernet frame types +# This file describes some of the various Ethernet +# protocol types that are used on Ethernet networks. +# +# This list could be found on: +# http://www.iana.org/assignments/ethernet-numbers +# http://www.iana.org/assignments/ieee-802-numbers +# +# <name> <hexnumber> <alias1>...<alias35> #Comment +# +IPv4 0800 ip ip4 # Internet IP (IPv4) +X25 0805 +ARP 0806 ether-arp # +FR_ARP 0808 # Frame Relay ARP [RFC1701] +BPQ 08FF # G8BPQ AX.25 Ethernet Packet +DEC 6000 # DEC Assigned proto +DNA_DL 6001 # DEC DNA Dump/Load +DNA_RC 6002 # DEC DNA Remote Console +DNA_RT 6003 # DEC DNA Routing +LAT 6004 # DEC LAT +DIAG 6005 # DEC Diagnostics +CUST 6006 # DEC Customer use +SCA 6007 # DEC Systems Comms Arch +TEB 6558 # Trans Ether Bridging [RFC1701] +RAW_FR 6559 # Raw Frame Relay [RFC1701] +RARP 8035 # Reverse ARP [RFC903] +AARP 80F3 # Appletalk AARP +ATALK 809B # Appletalk +802_1Q 8100 8021q 1q 802.1q dot1q # 802.1Q Virtual LAN tagged frame +IPX 8137 # Novell IPX +NetBEUI 8191 # NetBEUI +IPv6 86DD ip6 # IP version 6 +PPP 880B # PPP +ATMMPOA 884C # MultiProtocol over ATM +PPP_DISC 8863 # PPPoE discovery messages +PPP_SES 8864 # PPPoE session messages +ATMFATE 8884 # Frame-based ATM Transport over Ethernet +LOOP 9000 loopback # loop proto diff --git a/extensions/GNUmakefile.in b/extensions/GNUmakefile.in index 52915725..9eb4bf98 100644 --- a/extensions/GNUmakefile.in +++ b/extensions/GNUmakefile.in @@ -39,16 +39,20 @@ endif # Wildcard module list # pfx_build_mod := $(patsubst ${srcdir}/libxt_%.c,%,$(sort $(wildcard ${srcdir}/libxt_*.c))) +pfb_build_mod := $(patsubst ${srcdir}/libebt_%.c,%,$(sort $(wildcard ${srcdir}/libebt_*.c))) pfx_symlinks := NOTRACK state @ENABLE_IPV4_TRUE@ pf4_build_mod := $(patsubst ${srcdir}/libipt_%.c,%,$(sort $(wildcard ${srcdir}/libipt_*.c))) @ENABLE_IPV6_TRUE@ pf6_build_mod := $(patsubst ${srcdir}/libip6t_%.c,%,$(sort $(wildcard ${srcdir}/libip6t_*.c))) pfx_build_mod := $(filter-out @blacklist_modules@,${pfx_build_mod}) +pfb_build_mod := $(filter-out @blacklist_modules@,${pfb_build_mod}) pf4_build_mod := $(filter-out @blacklist_modules@,${pf4_build_mod}) pf6_build_mod := $(filter-out @blacklist_modules@,${pf6_build_mod}) pfx_objs := $(patsubst %,libxt_%.o,${pfx_build_mod}) +pfb_objs := $(patsubst %,libebt_%.o,${pfb_build_mod}) pf4_objs := $(patsubst %,libipt_%.o,${pf4_build_mod}) pf6_objs := $(patsubst %,libip6t_%.o,${pf6_build_mod}) pfx_solibs := $(patsubst %,libxt_%.so,${pfx_build_mod} ${pfx_symlinks}) +pfb_solibs := $(patsubst %,libebt_%.so,${pfb_build_mod}) pf4_solibs := $(patsubst %,libipt_%.so,${pf4_build_mod}) pf6_solibs := $(patsubst %,libip6t_%.so,${pf6_build_mod}) @@ -56,13 +60,14 @@ pf6_solibs := $(patsubst %,libip6t_%.so,${pf6_build_mod}) # # Building blocks # -targets := libext.a libext4.a libext6.a matches.man targets.man +targets := libext.a libext4.a libext6.a libext_ebt.a matches.man targets.man targets_install := @ENABLE_STATIC_TRUE@ libext_objs := ${pfx_objs} +@ENABLE_STATIC_TRUE@ libext_ebt_objs := ${pfb_objs} @ENABLE_STATIC_TRUE@ libext4_objs := ${pf4_objs} @ENABLE_STATIC_TRUE@ libext6_objs := ${pf6_objs} -@ENABLE_STATIC_FALSE@ targets += ${pfx_solibs} ${pf4_solibs} ${pf6_solibs} -@ENABLE_STATIC_FALSE@ targets_install += ${pfx_solibs} ${pf4_solibs} ${pf6_solibs} +@ENABLE_STATIC_FALSE@ targets += ${pfx_solibs} ${pfb_solibs} ${pf4_solibs} ${pf6_solibs} +@ENABLE_STATIC_FALSE@ targets_install += ${pfx_solibs} ${pfb_solibs} ${pf4_solibs} ${pf6_solibs} .SECONDARY: @@ -75,7 +80,7 @@ install: ${targets_install} if test -n "${targets_install}"; then install -pm0755 $^ "${DESTDIR}${xtlibdir}/"; fi; clean: - rm -f *.o *.oo *.so *.a {matches,targets}.man initext.c initext4.c initext6.c; + rm -f *.o *.oo *.so *.a {matches,targets}.man initext.c initext4.c initext6.c initextb.c; rm -f .*.d .*.dd; distclean: clean @@ -118,6 +123,9 @@ lib%.o: ${srcdir}/lib%.c libext.a: initext.o ${libext_objs} ${AM_VERBOSE_AR} ${AR} crs $@ $^; +libext_ebt.a: initextb.o ${libext_ebt_objs} + ${AM_VERBOSE_AR} ${AR} crs $@ $^; + libext4.a: initext4.o ${libext4_objs} ${AM_VERBOSE_AR} ${AR} crs $@ $^; @@ -125,6 +133,7 @@ libext6.a: initext6.o ${libext6_objs} ${AM_VERBOSE_AR} ${AR} crs $@ $^; initext_func := $(addprefix xt_,${pfx_build_mod}) +initextb_func := $(addprefix ebt_,${pfb_build_mod}) initext4_func := $(addprefix ipt_,${pf4_build_mod}) initext6_func := $(addprefix ip6t_,${pf6_build_mod}) @@ -133,6 +142,11 @@ initext6_func := $(addprefix ip6t_,${pf6_build_mod}) cmp -s $@ $@.tmp || mv $@.tmp $@; \ rm -f $@.tmp; +.initextb.dd: FORCE + @echo "${initextb_func}" >$@.tmp; \ + cmp -s $@ $@.tmp || mv $@.tmp $@; \ + rm -f $@.tmp; + .initext4.dd: FORCE @echo "${initext4_func}" >$@.tmp; \ cmp -s $@ $@.tmp || mv $@.tmp $@; \ @@ -159,6 +173,22 @@ initext.c: .initext.dd echo "}" >>$@; \ ); +initextb.c: .initextb.dd + ${AM_VERBOSE_GEN} + @( \ + echo "" >$@; \ + for i in ${initextb_func}; do \ + echo "extern void lib$${i}_init(void);" >>$@; \ + done; \ + echo "void init_extensionsb(void);" >>$@; \ + echo "void init_extensionsb(void)" >>$@; \ + echo "{" >>$@; \ + for i in ${initextb_func}; do \ + echo " ""lib$${i}_init();" >>$@; \ + done; \ + echo "}" >>$@; \ + ); + initext4.c: .initext4.dd ${AM_VERBOSE_GEN} @( \ @@ -219,8 +249,8 @@ man_run = \ fi; \ done >$@; -matches.man: .initext.dd .initext4.dd .initext6.dd $(wildcard ${srcdir}/lib*.man) - $(call man_run,$(call ex_matches,${pfx_build_mod} ${pf4_build_mod} ${pf6_build_mod} ${pfx_symlinks})) +matches.man: .initext.dd .initextb.dd .initext4.dd .initext6.dd $(wildcard ${srcdir}/lib*.man) + $(call man_run,$(call ex_matches,${pfx_build_mod} ${pfb_build_mod} ${pf4_build_mod} ${pf6_build_mod} ${pfx_symlinks})) targets.man: .initext.dd .initext4.dd .initext6.dd $(wildcard ${srcdir}/lib*.man) - $(call man_run,$(call ex_targets,${pfx_build_mod} ${pf4_build_mod} ${pf6_build_mod} ${pfx_symlinks})) + $(call man_run,$(call ex_targets,${pfx_build_mod} ${pfb_build_mod} ${pf4_build_mod} ${pf6_build_mod} ${pfx_symlinks})) diff --git a/extensions/libebt_802_3.c b/extensions/libebt_802_3.c new file mode 100644 index 00000000..3c4a1c3c --- /dev/null +++ b/extensions/libebt_802_3.c @@ -0,0 +1,133 @@ +/* 802_3 + * + * Author: + * Chris Vitale <csv@bluetail.com> + * + * May 2003 + * + * Adapted by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> + * to use libxtables for ebtables-compat + */ + +#include <stdbool.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <getopt.h> +#include <xtables.h> +#include <linux/netfilter_bridge/ebt_802_3.h> + +#define _802_3_SAP '1' +#define _802_3_TYPE '2' + +static const struct option br802_3_opts[] = { + { .name = "802_3-sap", .has_arg = true, .val = _802_3_SAP }, + { .name = "802_3-type", .has_arg = true, .val = _802_3_TYPE }, + XT_GETOPT_TABLEEND, +}; + +static void br802_3_print_help(void) +{ + printf( +"802_3 options:\n" +"--802_3-sap [!] protocol : 802.3 DSAP/SSAP- 1 byte value (hex)\n" +" DSAP and SSAP are always the same. One SAP applies to both fields\n" +"--802_3-type [!] protocol : 802.3 SNAP Type- 2 byte value (hex)\n" +" Type implies SAP value 0xaa\n"); +} + +static void br802_3_init(struct xt_entry_match *match) +{ + struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data; + + info->invflags = 0; + info->bitmask = 0; +} + +static int +br802_3_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_match **match) +{ + struct ebt_802_3_info *info = (struct ebt_802_3_info *) (*match)->data; + unsigned int i; + char *end; + + switch (c) { + case _802_3_SAP: + if (invert) + info->invflags |= EBT_802_3_SAP; + i = strtoul(optarg, &end, 16); + if (i > 255 || *end != '\0') + xtables_error(PARAMETER_PROBLEM, + "Problem with specified " + "sap hex value, %x",i); + info->sap = i; /* one byte, so no byte order worries */ + info->bitmask |= EBT_802_3_SAP; + break; + case _802_3_TYPE: + if (invert) + info->invflags |= EBT_802_3_TYPE; + i = strtoul(optarg, &end, 16); + if (i > 65535 || *end != '\0') { + xtables_error(PARAMETER_PROBLEM, + "Problem with the specified " + "type hex value, %x",i); + } + info->type = htons(i); + info->bitmask |= EBT_802_3_TYPE; + break; + default: + return 0; + } + + *flags |= info->bitmask; + return 1; +} + +static void +br802_3_final_check(unsigned int flags) +{ + if (!flags) + xtables_error(PARAMETER_PROBLEM, + "You must specify proper arguments"); +} + +static void br802_3_print(const void *ip, const struct xt_entry_match *match, + int numeric) +{ + struct ebt_802_3_info *info = (struct ebt_802_3_info *)match->data; + + if (info->bitmask & EBT_802_3_SAP) { + printf("--802_3-sap "); + if (info->invflags & EBT_802_3_SAP) + printf("! "); + printf("0x%.2x ", info->sap); + } + if (info->bitmask & EBT_802_3_TYPE) { + printf("--802_3-type "); + if (info->invflags & EBT_802_3_TYPE) + printf("! "); + printf("0x%.4x ", ntohs(info->type)); + } +} + +static struct xtables_match br802_3_match = +{ + .name = "802_3", + .revision = 0, + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_802_3_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_802_3_info)), + .init = br802_3_init, + .help = br802_3_print_help, + .parse = br802_3_parse, + .final_check = br802_3_final_check, + .print = br802_3_print, + .extra_opts = br802_3_opts, +}; + +void _init(void) +{ + xtables_register_match(&br802_3_match); +} diff --git a/extensions/libebt_ip.c b/extensions/libebt_ip.c new file mode 100644 index 00000000..8b628760 --- /dev/null +++ b/extensions/libebt_ip.c @@ -0,0 +1,312 @@ +/* ebt_ip + * + * Authors: + * Bart De Schuymer <bdschuym@pandora.be> + * + * Changes: + * added ip-sport and ip-dport; parsing of port arguments is + * based on code from iptables-1.2.7a + * Innominate Security Technologies AG <mhopf@innominate.com> + * September, 2002 + * + * Adapted by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> + * to use libxtables for ebtables-compat in 2015. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <netdb.h> +#include <xtables.h> +#include <linux/netfilter_bridge/ebt_ip.h> + +#define IP_SOURCE '1' +#define IP_DEST '2' +#define IP_EBT_TOS '3' /* include/bits/in.h seems to already define IP_TOS */ +#define IP_PROTO '4' +#define IP_SPORT '5' +#define IP_DPORT '6' + +static const struct option brip_opts[] = { + { .name = "ip-source", .has_arg = true, .val = IP_SOURCE }, + { .name = "ip-src", .has_arg = true, .val = IP_SOURCE }, + { .name = "ip-destination", .has_arg = true, .val = IP_DEST }, + { .name = "ip-dst", .has_arg = true, .val = IP_DEST }, + { .name = "ip-tos", .has_arg = true, .val = IP_EBT_TOS }, + { .name = "ip-protocol", .has_arg = true, .val = IP_PROTO }, + { .name = "ip-proto", .has_arg = true, .val = IP_PROTO }, + { .name = "ip-source-port", .has_arg = true, .val = IP_SPORT }, + { .name = "ip-sport", .has_arg = true, .val = IP_SPORT }, + { .name = "ip-destination-port",.has_arg = true, .val = IP_DPORT }, + { .name = "ip-dport", .has_arg = true, .val = IP_DPORT }, + XT_GETOPT_TABLEEND, +}; + +static void brip_print_help(void) +{ + printf( +"ip options:\n" +"--ip-src [!] address[/mask]: ip source specification\n" +"--ip-dst [!] address[/mask]: ip destination specification\n" +"--ip-tos [!] tos : ip tos specification\n" +"--ip-proto [!] protocol : ip protocol specification\n" +"--ip-sport [!] port[:port] : tcp/udp source port or port range\n" +"--ip-dport [!] port[:port] : tcp/udp destination port or port range\n"); +} + +static void brip_init(struct xt_entry_match *match) +{ + struct ebt_ip_info *info = (struct ebt_ip_info *)match->data; + + info->invflags = 0; + info->bitmask = 0; +} + +static void +parse_port_range(const char *protocol, const char *portstring, uint16_t *ports) +{ + char *buffer; + char *cp; + + buffer = strdup(portstring); + if ((cp = strchr(buffer, ':')) == NULL) + ports[0] = ports[1] = xtables_parse_port(buffer, NULL); + else { + *cp = '\0'; + cp++; + + ports[0] = buffer[0] ? xtables_parse_port(buffer, NULL) : 0; + ports[1] = cp[0] ? xtables_parse_port(cp, NULL) : 0xFFFF; + + if (ports[0] > ports[1]) + xtables_error(PARAMETER_PROBLEM, + "invalid portrange (min > max)"); + } + free(buffer); +} + +/* original code from ebtables: useful_functions.c */ +static int undot_ip(char *ip, unsigned char *ip2) +{ + char *p, *q, *end; + long int onebyte; + int i; + char buf[20]; + + strncpy(buf, ip, sizeof(buf) - 1); + + p = buf; + for (i = 0; i < 3; i++) { + if ((q = strchr(p, '.')) == NULL) + return -1; + *q = '\0'; + onebyte = strtol(p, &end, 10); + if (*end != '\0' || onebyte > 255 || onebyte < 0) + return -1; + ip2[i] = (unsigned char)onebyte; + p = q + 1; + } + + onebyte = strtol(p, &end, 10); + if (*end != '\0' || onebyte > 255 || onebyte < 0) + return -1; + ip2[3] = (unsigned char)onebyte; + + return 0; +} + +static int ip_mask(char *mask, unsigned char *mask2) +{ + char *end; + long int bits; + uint32_t mask22; + + if (undot_ip(mask, mask2)) { + /* not the /a.b.c.e format, maybe the /x format */ + bits = strtol(mask, &end, 10); + if (*end != '\0' || bits > 32 || bits < 0) + return -1; + if (bits != 0) { + mask22 = htonl(0xFFFFFFFF << (32 - bits)); + memcpy(mask2, &mask22, 4); + } else { + mask22 = 0xFFFFFFFF; + memcpy(mask2, &mask22, 4); + } + } + return 0; +} + +static void ebt_parse_ip_address(char *address, uint32_t *addr, uint32_t *msk) +{ + char *p; + + /* first the mask */ + if ((p = strrchr(address, '/')) != NULL) { + *p = '\0'; + if (ip_mask(p + 1, (unsigned char *)msk)) { + xtables_error(PARAMETER_PROBLEM, + "Problem with the IP mask '%s'", p + 1); + return; + } + } else + *msk = 0xFFFFFFFF; + + if (undot_ip(address, (unsigned char *)addr)) { + xtables_error(PARAMETER_PROBLEM, + "Problem with the IP address '%s'", address); + return; + } + *addr = *addr & *msk; +} + +static int +brip_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_match **match) +{ + struct ebt_ip_info *info = (struct ebt_ip_info *)(*match)->data; + + switch (c) { + case IP_SOURCE: + if (invert) + info->invflags |= EBT_IP_SOURCE; + ebt_parse_ip_address(optarg, &info->saddr, &info->smsk); + info->bitmask |= EBT_IP_SOURCE; + break; + case IP_DEST: + if (invert) + info->invflags |= EBT_IP_DEST; + ebt_parse_ip_address(optarg, &info->daddr, &info->dmsk); + info->bitmask |= EBT_IP_DEST; + break; + case IP_SPORT: + if (invert) + info->invflags |= EBT_IP_SPORT; + parse_port_range(NULL, optarg, info->sport); + info->bitmask |= EBT_IP_SPORT; + break; + case IP_DPORT: + if (invert) + info->invflags |= EBT_IP_DPORT; + parse_port_range(NULL, optarg, info->dport); + info->bitmask |= EBT_IP_DPORT; + break; + case IP_EBT_TOS: + if (invert) + info->invflags |= EBT_IP_TOS; + if (!xtables_strtoul(optarg, NULL, (uintmax_t *)&info->tos, + 0, 255)) + xtables_error(PARAMETER_PROBLEM, + "Problem with specified IP tos"); + info->bitmask |= EBT_IP_TOS; + break; + case IP_PROTO: + if (invert) + info->invflags |= EBT_IP_PROTO; + info->protocol = xtables_parse_protocol(optarg); + if (info->protocol == -1) + xtables_error(PARAMETER_PROBLEM, + "Unknown specified IP protocol - %s", + optarg); + info->bitmask |= EBT_IP_PROTO; + break; + default: + return 0; + } + + *flags |= info->bitmask; + return 1; +} + +static void brip_final_check(unsigned int flags) +{ + if (!flags) + xtables_error(PARAMETER_PROBLEM, + "You must specify proper arguments"); +} + +static void print_port_range(uint16_t *ports) +{ + if (ports[0] == ports[1]) + printf("%d ", ports[0]); + else + printf("%d:%d ", ports[0], ports[1]); +} + +static void brip_print(const void *ip, const struct xt_entry_match *match, + int numeric) +{ + struct ebt_ip_info *info = (struct ebt_ip_info *)match->data; + struct in_addr *addrp, *maskp; + + if (info->bitmask & EBT_IP_SOURCE) { + printf("--ip-src "); + if (info->invflags & EBT_IP_SOURCE) + printf("! "); + addrp = (struct in_addr *)&info->saddr; + maskp = (struct in_addr *)&info->smsk; + printf("%s%s ", xtables_ipaddr_to_numeric(addrp), + xtables_ipmask_to_numeric(maskp)); + } + if (info->bitmask & EBT_IP_DEST) { + printf("--ip-dst "); + if (info->invflags & EBT_IP_DEST) + printf("! "); + addrp = (struct in_addr *)&info->daddr; + maskp = (struct in_addr *)&info->dmsk; + printf("%s%s ", xtables_ipaddr_to_numeric(addrp), + xtables_ipmask_to_numeric(maskp)); + } + if (info->bitmask & EBT_IP_TOS) { + printf("--ip-tos "); + if (info->invflags & EBT_IP_TOS) + printf("! "); + printf("0x%02X ", info->tos); + } + if (info->bitmask & EBT_IP_PROTO) { + struct protoent *pe; + + printf("--ip-proto "); + if (info->invflags & EBT_IP_PROTO) + printf("! "); + pe = getprotobynumber(info->protocol); + if (pe == NULL) { + printf("%d ", info->protocol); + } else { + printf("%s ", pe->p_name); + } + } + if (info->bitmask & EBT_IP_SPORT) { + printf("--ip-sport "); + if (info->invflags & EBT_IP_SPORT) + printf("! "); + print_port_range(info->sport); + } + if (info->bitmask & EBT_IP_DPORT) { + printf("--ip-dport "); + if (info->invflags & EBT_IP_DPORT) + printf("! "); + print_port_range(info->dport); + } +} + +static struct xtables_match brip_match = { + .name = "ip", + .revision = 0, + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_ip_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_ip_info)), + .init = brip_init, + .help = brip_print_help, + .parse = brip_parse, + .final_check = brip_final_check, + .print = brip_print, + .extra_opts = brip_opts, +}; + +void _init(void) +{ + xtables_register_match(&brip_match); +} diff --git a/extensions/libebt_log.c b/extensions/libebt_log.c new file mode 100644 index 00000000..0799185d --- /dev/null +++ b/extensions/libebt_log.c @@ -0,0 +1,197 @@ +/* + * Bart De Schuymer <bdschuym@pandora.be> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Giuseppe Longo <giuseppelng@gmail.com> adapted the original code to the + * xtables-compat environment in 2015. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <syslog.h> +#include <string.h> +#include <getopt.h> +#include <xtables.h> +#include <linux/netfilter_bridge/ebt_log.h> + +#define LOG_DEFAULT_LEVEL LOG_INFO + +#define LOG_PREFIX '1' +#define LOG_LEVEL '2' +#define LOG_ARP '3' +#define LOG_IP '4' +#define LOG_LOG '5' +#define LOG_IP6 '6' + +typedef struct _code { + char *c_name; + int c_val; +} CODE; + +static CODE eight_priority[] = { + { "emerg", LOG_EMERG }, + { "alert", LOG_ALERT }, + { "crit", LOG_CRIT }, + { "error", LOG_ERR }, + { "warning", LOG_WARNING }, + { "notice", LOG_NOTICE }, + { "info", LOG_INFO }, + { "debug", LOG_DEBUG } +}; + +static int name_to_loglevel(const char *arg) +{ + int i; + + for (i = 0; i < 8; i++) + if (!strcmp(arg, eight_priority[i].c_name)) + return eight_priority[i].c_val; + + /* return bad loglevel */ + return 9; +} + +static const struct option brlog_opts[] = { + { .name = "log-prefix", .has_arg = true, .val = LOG_PREFIX }, + { .name = "log-level", .has_arg = true, .val = LOG_LEVEL }, + { .name = "log-arp", .has_arg = false, .val = LOG_ARP }, + { .name = "log-ip", .has_arg = false, .val = LOG_IP }, + { .name = "log", .has_arg = false, .val = LOG_LOG }, + { .name = "log-ip6", .has_arg = false, .val = LOG_IP6 }, + XT_GETOPT_TABLEEND, +}; + +static void brlog_help(void) +{ + int i; + + printf( +"log options:\n" +"--log : use this if you're not specifying anything\n" +"--log-level level : level = [1-8] or a string\n" +"--log-prefix prefix : max. %d chars.\n" +"--log-ip : put ip info. in the log for ip packets\n" +"--log-arp : put (r)arp info. in the log for (r)arp packets\n" +"--log-ip6 : put ip6 info. in the log for ip6 packets\n" + , EBT_LOG_PREFIX_SIZE - 1); + for (i = 0; i < 8; i++) + printf("%d = %s\n", eight_priority[i].c_val, + eight_priority[i].c_name); +} + +static void brlog_init(struct xt_entry_target *t) +{ + struct ebt_log_info *loginfo = (struct ebt_log_info *)t->data; + + loginfo->bitmask = 0; + loginfo->prefix[0] = '\0'; + loginfo->loglevel = LOG_NOTICE; +} + +static int brlog_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_target **target) +{ + struct ebt_log_info *loginfo = (struct ebt_log_info *)(*target)->data; + long int i; + char *end; + + switch (c) { + case LOG_PREFIX: + if (invert) + xtables_error(PARAMETER_PROBLEM, + "Unexpected `!` after --log-prefix"); + if (strlen(optarg) > sizeof(loginfo->prefix) - 1) + xtables_error(PARAMETER_PROBLEM, + "Prefix too long"); + if (strchr(optarg, '\"')) + xtables_error(PARAMETER_PROBLEM, + "Use of \\\" is not allowed" + " in the prefix"); + strcpy((char *)loginfo->prefix, (char *)optarg); + break; + case LOG_LEVEL: + i = strtol(optarg, &end, 16); + if (*end != '\0' || i < 0 || i > 7) + loginfo->loglevel = name_to_loglevel(optarg); + else + loginfo->loglevel = i; + + if (loginfo->loglevel == 9) + xtables_error(PARAMETER_PROBLEM, + "Problem with the log-level"); + break; + case LOG_IP: + if (invert) + xtables_error(PARAMETER_PROBLEM, + "Unexpected `!' after --log-ip"); + loginfo->bitmask |= EBT_LOG_IP; + break; + case LOG_ARP: + if (invert) + xtables_error(PARAMETER_PROBLEM, + "Unexpected `!' after --log-arp"); + loginfo->bitmask |= EBT_LOG_ARP; + case LOG_LOG: + if (invert) + xtables_error(PARAMETER_PROBLEM, + "Unexpected `!' after --log"); + break; + case LOG_IP6: + if (invert) + xtables_error(PARAMETER_PROBLEM, + "Unexpected `!' after --log-ip6"); + loginfo->bitmask |= EBT_LOG_IP6; + break; + default: + return 0; + } + + *flags |= loginfo->bitmask; + return 1; +} + +static void brlog_final_check(unsigned int flags) +{ +} + +static void brlog_print(const void *ip, const struct xt_entry_target *target, + int numeric) +{ + struct ebt_log_info *loginfo = (struct ebt_log_info *)target->data; + + printf("--log-level %s --log-prefix \"%s\"", + eight_priority[loginfo->loglevel].c_name, + loginfo->prefix); + + if (loginfo->bitmask & EBT_LOG_IP) + printf(" --log-ip"); + if (loginfo->bitmask & EBT_LOG_ARP) + printf(" --log-arp"); + if (loginfo->bitmask & EBT_LOG_IP6) + printf(" --log-ip6"); + printf(" "); +} + +static struct xtables_target brlog_target = { + .name = "log", + .revision = 0, + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_log_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_log_info)), + .init = brlog_init, + .help = brlog_help, + .parse = brlog_parse, + .final_check = brlog_final_check, + .print = brlog_print, + .extra_opts = brlog_opts, +}; + +void _init(void) +{ + xtables_register_target(&brlog_target); +} diff --git a/extensions/libebt_mark.c b/extensions/libebt_mark.c new file mode 100644 index 00000000..587b4a63 --- /dev/null +++ b/extensions/libebt_mark.c @@ -0,0 +1,191 @@ +/* ebt_mark + * + * Authors: + * Bart De Schuymer <bdschuym@pandora.be> + * + * July, 2002, September 2006 + * + * Adapted by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> + * to use libxtables for ebtables-compat in 2015. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <xtables.h> +#include <linux/netfilter_bridge/ebt_mark_t.h> +#include "iptables/nft.h" +#include "iptables/nft-bridge.h" + +static int mark_supplied; + +#define MARK_TARGET '1' +#define MARK_SETMARK '2' +#define MARK_ORMARK '3' +#define MARK_ANDMARK '4' +#define MARK_XORMARK '5' +static struct option brmark_opts[] = { + { .name = "mark-target",.has_arg = true, .val = MARK_TARGET }, + /* an oldtime messup, we should have always used the scheme + * <extension-name>-<option> */ + { .name = "set-mark", .has_arg = true, .val = MARK_SETMARK }, + { .name = "mark-set", .has_arg = true, .val = MARK_SETMARK }, + { .name = "mark-or", .has_arg = true, .val = MARK_ORMARK }, + { .name = "mark-and", .has_arg = true, .val = MARK_ANDMARK }, + { .name = "mark-xor", .has_arg = true, .val = MARK_XORMARK }, + XT_GETOPT_TABLEEND, +}; + +static void brmark_print_help(void) +{ + printf( + "mark target options:\n" + " --mark-set value : Set nfmark value\n" + " --mark-or value : Or nfmark with value (nfmark |= value)\n" + " --mark-and value : And nfmark with value (nfmark &= value)\n" + " --mark-xor value : Xor nfmark with value (nfmark ^= value)\n" + " --mark-target target : ACCEPT, DROP, RETURN or CONTINUE\n"); +} + +static void brmark_init(struct xt_entry_target *target) +{ + struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data; + + info->target = EBT_ACCEPT; + info->mark = 0; + mark_supplied = 0; +} + +#define OPT_MARK_TARGET 0x01 +#define OPT_MARK_SETMARK 0x02 +#define OPT_MARK_ORMARK 0x04 +#define OPT_MARK_ANDMARK 0x08 +#define OPT_MARK_XORMARK 0x10 + +static int +brmark_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_target **target) +{ + struct ebt_mark_t_info *info = (struct ebt_mark_t_info *) + (*target)->data; + char *end; + uint32_t mask; + + switch (c) { + case MARK_TARGET: + { unsigned int tmp; + EBT_CHECK_OPTION(flags, OPT_MARK_TARGET); + if (ebt_fill_target(optarg, &tmp)) + xtables_error(PARAMETER_PROBLEM, + "Illegal --mark-target target"); + /* the 4 lsb are left to designate the target */ + info->target = (info->target & ~EBT_VERDICT_BITS) | + (tmp & EBT_VERDICT_BITS); + } + return 1; + case MARK_SETMARK: + EBT_CHECK_OPTION(flags, OPT_MARK_SETMARK); + mask = (OPT_MARK_ORMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK); + if (*flags & mask) + xtables_error(PARAMETER_PROBLEM, + "--mark-set cannot be used together with" + " specific --mark option"); + info->target = (info->target & EBT_VERDICT_BITS) | + MARK_SET_VALUE; + break; + case MARK_ORMARK: + EBT_CHECK_OPTION(flags, OPT_MARK_ORMARK); + mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK); + if (*flags & mask) + xtables_error(PARAMETER_PROBLEM, + "--mark-or cannot be used together with" + " specific --mark option"); + info->target = (info->target & EBT_VERDICT_BITS) | + MARK_OR_VALUE; + break; + case MARK_ANDMARK: + EBT_CHECK_OPTION(flags, OPT_MARK_ANDMARK); + mask = (OPT_MARK_SETMARK|OPT_MARK_ORMARK|OPT_MARK_XORMARK); + if (*flags & mask) + xtables_error(PARAMETER_PROBLEM, + "--mark-and cannot be used together with" + " specific --mark option"); + info->target = (info->target & EBT_VERDICT_BITS) | + MARK_AND_VALUE; + break; + case MARK_XORMARK: + EBT_CHECK_OPTION(flags, OPT_MARK_XORMARK); + mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_ORMARK); + if (*flags & mask) + xtables_error(PARAMETER_PROBLEM, + "--mark-xor cannot be used together with" + " specific --mark option"); + info->target = (info->target & EBT_VERDICT_BITS) | + MARK_XOR_VALUE; + break; + default: + return 0; + } + /* mutual code */ + info->mark = strtoul(optarg, &end, 0); + if (*end != '\0' || end == optarg) + xtables_error(PARAMETER_PROBLEM, "Bad MARK value '%s'", + optarg); + + mark_supplied = 1; + return 1; +} + +static void brmark_print(const void *ip, const struct xt_entry_target *target, + int numeric) +{ + struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data; + int tmp; + + tmp = info->target & ~EBT_VERDICT_BITS; + if (tmp == MARK_SET_VALUE) + printf("--mark-set"); + else if (tmp == MARK_OR_VALUE) + printf("--mark-or"); + else if (tmp == MARK_XOR_VALUE) + printf("--mark-xor"); + else if (tmp == MARK_AND_VALUE) + printf("--mark-and"); + else + xtables_error(PARAMETER_PROBLEM, "Unknown mark action"); + + printf(" 0x%lx", info->mark); + tmp = info->target | ~EBT_VERDICT_BITS; + printf(" --mark-target %s", ebt_target_name(tmp)); +} + +static void brmark_final_check(unsigned int flags) +{ + if (mark_supplied == 0) + xtables_error(PARAMETER_PROBLEM, "No mark value supplied"); + + if (!flags) + xtables_error(PARAMETER_PROBLEM, + "You must specify some option"); +} + +static struct xtables_target brmark_target = { + .name = "mark", + .revision = 0, + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_mark_t_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_mark_t_info)), + .help = brmark_print_help, + .init = brmark_init, + .parse = brmark_parse, + .final_check = brmark_final_check, + .print = brmark_print, + .extra_opts = brmark_opts, +}; + +void _init(void) +{ + xtables_register_target(&brmark_target); +} diff --git a/extensions/libebt_mark_m.c b/extensions/libebt_mark_m.c new file mode 100644 index 00000000..ef9eb6a6 --- /dev/null +++ b/extensions/libebt_mark_m.c @@ -0,0 +1,118 @@ +/* ebt_mark_m + * + * Authors: + * Bart De Schuymer <bdschuym@pandora.be> + * + * July, 2002 + * + * Adapted by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> + * to use libxtables for ebtables-compat in 2015. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <xtables.h> +#include <linux/netfilter_bridge/ebt_mark_m.h> + +#define MARK '1' + +static struct option brmark_m_opts[] = { + { .name = "mark", .has_arg = true, .val = MARK }, + XT_GETOPT_TABLEEND, +}; + +static void brmark_m_print_help(void) +{ + printf( +"mark option:\n" +"--mark [!] [value][/mask]: Match nfmask value (see man page)\n"); +} + +static void brmark_m_init(struct xt_entry_match *match) +{ + struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)match->data; + + info->mark = 0; + info->mask = 0; + info->invert = 0; + info->bitmask = 0; +} + +#define OPT_MARK 0x01 +static int +brmark_m_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_match **match) +{ + struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) + (*match)->data; + char *end; + + switch (c) { + case MARK: + if (invert) + info->invert = 1; + info->mark = strtoul(optarg, &end, 0); + info->bitmask = EBT_MARK_AND; + if (*end == '/') { + if (end == optarg) + info->bitmask = EBT_MARK_OR; + info->mask = strtoul(end+1, &end, 0); + } else { + info->mask = 0xffffffff; + } + if (*end != '\0' || end == optarg) + xtables_error(PARAMETER_PROBLEM, "Bad mark value '%s'", + optarg); + break; + default: + return 0; + } + + *flags |= info->bitmask; + return 1; +} + +static void brmark_m_final_check(unsigned int flags) +{ + if (!flags) + xtables_error(PARAMETER_PROBLEM, + "You must specify proper arguments"); +} + +static void brmark_m_print(const void *ip, const struct xt_entry_match *match, + int numeric) +{ + struct ebt_mark_m_info *info = (struct ebt_mark_m_info *)match->data; + + printf("--mark "); + if (info->invert) + printf("! "); + if (info->bitmask == EBT_MARK_OR) + printf("/0x%lx ", info->mask); + else if (info->mask != 0xffffffff) + printf("0x%lx/0x%lx ", info->mark, info->mask); + else + printf("0x%lx ", info->mark); +} + +static struct xtables_match brmark_m_match = { + .name = "mark_m", + .revision = 0, + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_mark_m_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_mark_m_info)), + .init = brmark_m_init, + .help = brmark_m_print_help, + .parse = brmark_m_parse, + .final_check = brmark_m_final_check, + .print = brmark_m_print, + .extra_opts = brmark_m_opts, +}; + +void _init(void) +{ + xtables_register_match(&brmark_m_match); +} diff --git a/include/ebtables/ethernetdb.h b/include/ebtables/ethernetdb.h new file mode 100644 index 00000000..46d8bfd1 --- /dev/null +++ b/include/ebtables/ethernetdb.h @@ -0,0 +1,58 @@ +/* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation; either version 2 of the License, or +* (at your option) any later version. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program; if not, write to the Free Software +* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +/* All data returned by the network data base library are supplied in + host order and returned in network order (suitable for use in + system calls). */ + +#ifndef _ETHERNETDB_H +#define _ETHERNETDB_H 1 + +#include <features.h> +#include <netinet/in.h> +#include <stdint.h> + +/* Absolute file name for network data base files. */ +#ifndef _PATH_ETHERTYPES +#define _PATH_ETHERTYPES "/etc/ethertypes" +#endif /* _PATH_ETHERTYPES */ + +struct ethertypeent { + char *e_name; /* Official ethernet type name. */ + char **e_aliases; /* Alias list. */ + int e_ethertype; /* Ethernet type number. */ +}; + +/* Open ethertype data base files and mark them as staying open even + after a later search if STAY_OPEN is non-zero. */ +extern void setethertypeent(int __stay_open) __THROW; + +/* Close ethertype data base files and clear `stay open' flag. */ +extern void endethertypeent(void) __THROW; + +/* Get next entry from ethertype data base file. Open data base if + necessary. */ +extern struct ethertypeent *getethertypeent(void) __THROW; + +/* Return entry from ethertype data base for network with NAME. */ +extern struct ethertypeent *getethertypebyname(__const char *__name) + __THROW; + +/* Return entry from ethertype data base which number is PROTO. */ +extern struct ethertypeent *getethertypebynumber(int __ethertype) __THROW; + + +#endif /* ethernetdb.h */ diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h new file mode 100644 index 00000000..71e9299b --- /dev/null +++ b/include/linux/netfilter_bridge.h @@ -0,0 +1,33 @@ +#ifndef __LINUX_BRIDGE_NETFILTER_H +#define __LINUX_BRIDGE_NETFILTER_H + +/* bridge-specific defines for netfilter. + */ +#include <limits.h> + +/* Bridge Hooks */ +/* After promisc drops, checksum checks. */ +#define NF_BR_PRE_ROUTING 0 +/* If the packet is destined for this box. */ +#define NF_BR_LOCAL_IN 1 +/* If the packet is destined for another interface. */ +#define NF_BR_FORWARD 2 +/* Packets coming from a local process. */ +#define NF_BR_LOCAL_OUT 3 +/* Packets about to hit the wire. */ +#define NF_BR_POST_ROUTING 4 +/* Not really a hook, but used for the ebtables broute table */ +#define NF_BR_BROUTING 5 +#define NF_BR_NUMHOOKS 6 + +enum nf_br_hook_priorities { + NF_BR_PRI_FIRST = INT_MIN, + NF_BR_PRI_FILTER_BRIDGED = -200, + NF_BR_PRI_FILTER_OTHER = 200, + NF_BR_PRI_NAT_DST_BRIDGED = -300, + NF_BR_PRI_NAT_DST_OTHER = 100, + NF_BR_PRI_NAT_SRC = 300, + NF_BR_PRI_LAST = INT_MAX, +}; + +#endif diff --git a/include/linux/netfilter_bridge/ebt_802_3.h b/include/linux/netfilter_bridge/ebt_802_3.h new file mode 100644 index 00000000..f37522aa --- /dev/null +++ b/include/linux/netfilter_bridge/ebt_802_3.h @@ -0,0 +1,63 @@ +#ifndef _UAPI__LINUX_BRIDGE_EBT_802_3_H +#define _UAPI__LINUX_BRIDGE_EBT_802_3_H + +#include <linux/types.h> +#include <linux/if_ether.h> + +#define EBT_802_3_SAP 0x01 +#define EBT_802_3_TYPE 0x02 + +#define EBT_802_3_MATCH "802_3" + +/* + * If frame has DSAP/SSAP value 0xaa you must check the SNAP type + * to discover what kind of packet we're carrying. + */ +#define CHECK_TYPE 0xaa + +/* + * Control field may be one or two bytes. If the first byte has + * the value 0x03 then the entire length is one byte, otherwise it is two. + * One byte controls are used in Unnumbered Information frames. + * Two byte controls are used in Numbered Information frames. + */ +#define IS_UI 0x03 + +#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3) + +/* ui has one byte ctrl, ni has two */ +struct hdr_ui { + __u8 dsap; + __u8 ssap; + __u8 ctrl; + __u8 orig[3]; + __be16 type; +}; + +struct hdr_ni { + __u8 dsap; + __u8 ssap; + __be16 ctrl; + __u8 orig[3]; + __be16 type; +}; + +struct ebt_802_3_hdr { + __u8 daddr[ETH_ALEN]; + __u8 saddr[ETH_ALEN]; + __be16 len; + union { + struct hdr_ui ui; + struct hdr_ni ni; + } llc; +}; + + +struct ebt_802_3_info { + __u8 sap; + __be16 type; + __u8 bitmask; + __u8 invflags; +}; + +#endif /* _UAPI__LINUX_BRIDGE_EBT_802_3_H */ diff --git a/include/linux/netfilter_bridge/ebt_ip.h b/include/linux/netfilter_bridge/ebt_ip.h new file mode 100644 index 00000000..c4bbc41b --- /dev/null +++ b/include/linux/netfilter_bridge/ebt_ip.h @@ -0,0 +1,44 @@ +/* + * ebt_ip + * + * Authors: + * Bart De Schuymer <bart.de.schuymer@pandora.be> + * + * April, 2002 + * + * Changes: + * added ip-sport and ip-dport + * Innominate Security Technologies AG <mhopf@innominate.com> + * September, 2002 + */ + +#ifndef __LINUX_BRIDGE_EBT_IP_H +#define __LINUX_BRIDGE_EBT_IP_H + +#include <linux/types.h> + +#define EBT_IP_SOURCE 0x01 +#define EBT_IP_DEST 0x02 +#define EBT_IP_TOS 0x04 +#define EBT_IP_PROTO 0x08 +#define EBT_IP_SPORT 0x10 +#define EBT_IP_DPORT 0x20 +#define EBT_IP_MASK (EBT_IP_SOURCE | EBT_IP_DEST | EBT_IP_TOS | EBT_IP_PROTO |\ + EBT_IP_SPORT | EBT_IP_DPORT ) +#define EBT_IP_MATCH "ip" + +/* the same values are used for the invflags */ +struct ebt_ip_info { + __be32 saddr; + __be32 daddr; + __be32 smsk; + __be32 dmsk; + __u8 tos; + __u8 protocol; + __u8 bitmask; + __u8 invflags; + __u16 sport[2]; + __u16 dport[2]; +}; + +#endif diff --git a/include/linux/netfilter_bridge/ebt_mark_m.h b/include/linux/netfilter_bridge/ebt_mark_m.h new file mode 100644 index 00000000..410f9e5a --- /dev/null +++ b/include/linux/netfilter_bridge/ebt_mark_m.h @@ -0,0 +1,16 @@ +#ifndef __LINUX_BRIDGE_EBT_MARK_M_H +#define __LINUX_BRIDGE_EBT_MARK_M_H + +#include <linux/types.h> + +#define EBT_MARK_AND 0x01 +#define EBT_MARK_OR 0x02 +#define EBT_MARK_MASK (EBT_MARK_AND | EBT_MARK_OR) +struct ebt_mark_m_info { + unsigned long mark, mask; + __u8 invert; + __u8 bitmask; +}; +#define EBT_MARK_MATCH "mark_m" + +#endif diff --git a/include/linux/netfilter_bridge/ebt_mark_t.h b/include/linux/netfilter_bridge/ebt_mark_t.h new file mode 100644 index 00000000..7d5a268a --- /dev/null +++ b/include/linux/netfilter_bridge/ebt_mark_t.h @@ -0,0 +1,23 @@ +#ifndef __LINUX_BRIDGE_EBT_MARK_T_H +#define __LINUX_BRIDGE_EBT_MARK_T_H + +/* The target member is reused for adding new actions, the + * value of the real target is -1 to -NUM_STANDARD_TARGETS. + * For backward compatibility, the 4 lsb (2 would be enough, + * but let's play it safe) are kept to designate this target. + * The remaining bits designate the action. By making the set + * action 0xfffffff0, the result will look ok for older + * versions. [September 2006] */ +#define MARK_SET_VALUE (0xfffffff0) +#define MARK_OR_VALUE (0xffffffe0) +#define MARK_AND_VALUE (0xffffffd0) +#define MARK_XOR_VALUE (0xffffffc0) + +struct ebt_mark_t_info { + unsigned long mark; + /* EBT_ACCEPT, EBT_DROP, EBT_CONTINUE or EBT_RETURN */ + int target; +}; +#define EBT_MARK_TARGET "mark" + +#endif diff --git a/iptables/Makefile.am b/iptables/Makefile.am index aaaade85..c66e5337 100644 --- a/iptables/Makefile.am +++ b/iptables/Makefile.am @@ -29,7 +29,7 @@ xtables_multi_LDADD += ../libxtables/libxtables.la -lm if ENABLE_NFTABLES xtables_compat_multi_SOURCES = xtables-compat-multi.c iptables-xml.c xtables_compat_multi_CFLAGS = ${AM_CFLAGS} -xtables_compat_multi_LDADD = ../extensions/libext.a +xtables_compat_multi_LDADD = ../extensions/libext.a ../extensions/libext_ebt.a if ENABLE_STATIC xtables_compat_multi_CFLAGS += -DALL_INCLUSIVE endif @@ -39,8 +39,10 @@ xtables_compat_multi_SOURCES += xtables-save.c xtables-restore.c \ xtables-standalone.c xtables.c nft.c \ nft-shared.c nft-ipv4.c nft-ipv6.c nft-arp.c \ xtables-config.c xtables-events.c \ - xtables-arp-standalone.c xtables-arp.c -xtables_compat_multi_LDADD += ${libmnl_LIBS} ${libnftnl_LIBS} ../extensions/libext4.a ../extensions/libext6.a + xtables-arp-standalone.c xtables-arp.c \ + getethertype.c nft-bridge.c \ + xtables-eb-standalone.c xtables-eb.c +xtables_compat_multi_LDADD += ${libmnl_LIBS} ${libnftnl_LIBS} ../extensions/libext4.a ../extensions/libext6.a ../extensions/libext_ebt.a # yacc and lex generate dirty code xtables_compat_multi-xtables-config-parser.o xtables_compat_multi-xtables-config-syntax.o: AM_CFLAGS += -Wno-missing-prototypes -Wno-missing-declarations -Wno-implicit-function-declaration -Wno-nested-externs -Wno-undef -Wno-redundant-decls xtables_compat_multi_SOURCES += xshared.c @@ -67,7 +69,7 @@ endif if ENABLE_NFTABLES x_sbin_links = iptables-compat iptables-compat-restore iptables-compat-save \ ip6tables-compat ip6tables-compat-restore ip6tables-compat-save \ - arptables-compat xtables-config xtables-events + arptables-compat ebtables-compat xtables-config xtables-events endif iptables-extensions.8: iptables-extensions.8.tmpl ../extensions/matches.man ../extensions/targets.man diff --git a/iptables/getethertype.c b/iptables/getethertype.c new file mode 100644 index 00000000..027ef4ad --- /dev/null +++ b/iptables/getethertype.c @@ -0,0 +1,161 @@ +/* +* getethertype.c +* +* This file was part of the NYS Library. +* +** The NYS Library is free software; you can redistribute it and/or +** modify it under the terms of the GNU Library General Public License as +** published by the Free Software Foundation; either version 2 of the +** License, or (at your option) any later version. +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation; either version 2 of the License, or +* (at your option) any later version. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program; if not, write to the Free Software +* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +/******************************************************************** +* Description: Ethertype name service switch and the ethertypes +* database access functions +* Author: Nick Fedchik <fnm@ukrsat.com> +* Checker: Bart De Schuymer <bdschuym@pandora.be> +* Origin: uClibc-0.9.16/libc/inet/getproto.c +* Created at: Mon Nov 11 12:20:11 EET 2002 +********************************************************************/ + +#include <ctype.h> +#include <features.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <netinet/ether.h> +#include <net/ethernet.h> + +#include <ebtables/ethernetdb.h> + +#define MAXALIASES 35 + +static FILE *etherf = NULL; +static char line[BUFSIZ + 1]; +static struct ethertypeent et_ent; +static char *ethertype_aliases[MAXALIASES]; +static int ethertype_stayopen; + +void setethertypeent(int f) +{ + if (etherf == NULL) + etherf = fopen(_PATH_ETHERTYPES, "r"); + else + rewind(etherf); + ethertype_stayopen |= f; +} + +void endethertypeent(void) +{ + if (etherf) { + fclose(etherf); + etherf = NULL; + } + ethertype_stayopen = 0; +} + +struct ethertypeent *getethertypeent(void) +{ + char *e; + char *endptr; + register char *cp, **q; + + if (etherf == NULL + && (etherf = fopen(_PATH_ETHERTYPES, "r")) == NULL) { + return (NULL); + } + +again: + if ((e = fgets(line, BUFSIZ, etherf)) == NULL) { + return (NULL); + } + if (*e == '#') + goto again; + cp = strpbrk(e, "#\n"); + if (cp == NULL) + goto again; + *cp = '\0'; + et_ent.e_name = e; + cp = strpbrk(e, " \t"); + if (cp == NULL) + goto again; + *cp++ = '\0'; + while (*cp == ' ' || *cp == '\t') + cp++; + e = strpbrk(cp, " \t"); + if (e != NULL) + *e++ = '\0'; +// Check point + et_ent.e_ethertype = strtol(cp, &endptr, 16); + if (*endptr != '\0' + || (et_ent.e_ethertype < ETH_ZLEN + || et_ent.e_ethertype > 0xFFFF)) + goto again; // Skip invalid etherproto type entry + q = et_ent.e_aliases = ethertype_aliases; + if (e != NULL) { + cp = e; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q < ðertype_aliases[MAXALIASES - 1]) + *q++ = cp; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + } + } + *q = NULL; + return (&et_ent); +} + + +struct ethertypeent *getethertypebyname(const char *name) +{ + register struct ethertypeent *e; + register char **cp; + + setethertypeent(ethertype_stayopen); + while ((e = getethertypeent()) != NULL) { + if (strcasecmp(e->e_name, name) == 0) + break; + for (cp = e->e_aliases; *cp != 0; cp++) + if (strcasecmp(*cp, name) == 0) + goto found; + } +found: + if (!ethertype_stayopen) + endethertypeent(); + return (e); +} + +struct ethertypeent *getethertypebynumber(int type) +{ + register struct ethertypeent *e; + + setethertypeent(ethertype_stayopen); + while ((e = getethertypeent()) != NULL) + if (e->e_ethertype == type) + break; + if (!ethertype_stayopen) + endethertypeent(); + return (e); +} diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c index b10b45f1..24b31c5a 100644 --- a/iptables/nft-arp.c +++ b/iptables/nft-arp.c @@ -156,13 +156,15 @@ static int nft_arp_add(struct nft_rule *r, void *data) if (fw->arp.arhrd != 0) { op = nft_invflags2cmp(fw->arp.invflags, ARPT_INV_ARPHRD); - add_payload(r, offsetof(struct arphdr, ar_hrd), 2); + add_payload(r, offsetof(struct arphdr, ar_hrd), 2, + NFT_PAYLOAD_NETWORK_HEADER); add_cmp_u16(r, fw->arp.arhrd, op); } if (fw->arp.arpro != 0) { op = nft_invflags2cmp(fw->arp.invflags, ARPT_INV_ARPPRO); - add_payload(r, offsetof(struct arphdr, ar_pro), 2); + add_payload(r, offsetof(struct arphdr, ar_pro), 2, + NFT_PAYLOAD_NETWORK_HEADER); add_cmp_u16(r, fw->arp.arpro, op); } @@ -176,13 +178,15 @@ static int nft_arp_add(struct nft_rule *r, void *data) if (fw->arp.arpop != 0) { op = nft_invflags2cmp(fw->arp.invflags, ARPT_INV_ARPOP); - add_payload(r, offsetof(struct arphdr, ar_op), 2); + add_payload(r, offsetof(struct arphdr, ar_op), 2, + NFT_PAYLOAD_NETWORK_HEADER); add_cmp_u16(r, fw->arp.arpop, op); } if (fw->arp.src_devaddr.addr[0] != '\0') { op = nft_invflags2cmp(fw->arp.invflags, ARPT_INV_SRCDEVADDR); - add_payload(r, sizeof(struct arphdr), fw->arp.arhln); + add_payload(r, sizeof(struct arphdr), fw->arp.arhln, + NFT_PAYLOAD_NETWORK_HEADER); add_cmp_ptr(r, op, fw->arp.src_devaddr.addr, fw->arp.arhln); } @@ -195,7 +199,8 @@ static int nft_arp_add(struct nft_rule *r, void *data) if (fw->arp.tgt_devaddr.addr[0] != '\0') { op = nft_invflags2cmp(fw->arp.invflags, ARPT_INV_TGTDEVADDR); - add_payload(r, sizeof(struct arphdr) + fw->arp.arhln + 4, fw->arp.arhln); + add_payload(r, sizeof(struct arphdr) + fw->arp.arhln + 4, + fw->arp.arhln, NFT_PAYLOAD_NETWORK_HEADER); add_cmp_ptr(r, op, fw->arp.tgt_devaddr.addr, fw->arp.arhln); } diff --git a/iptables/nft-bridge.c b/iptables/nft-bridge.c new file mode 100644 index 00000000..e3ab667f --- /dev/null +++ b/iptables/nft-bridge.c @@ -0,0 +1,646 @@ +/* + * (C) 2014 by Giuseppe Longo <giuseppelng@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <netinet/ether.h> +#include <inttypes.h> + +#include <xtables.h> +#include <libiptc/libxtc.h> +#include <linux/netfilter/nf_tables.h> +#include <ebtables/ethernetdb.h> + +#include "nft-shared.h" +#include "nft-bridge.h" +#include "nft.h" + +void ebt_cs_clean(struct ebtables_command_state *cs) +{ + struct ebt_match *m, *nm; + + xtables_rule_matches_free(&cs->matches); + + for (m = cs->match_list; m;) { + nm = m->next; + if (!m->ismatch) + free(m->u.watcher->t); + free(m); + m = nm; + } +} + +/* 0: default, print only 2 digits if necessary + * 2: always print 2 digits, a printed mac address + * then always has the same length + */ +int ebt_printstyle_mac; + +static void ebt_print_mac(const unsigned char *mac) +{ + if (ebt_printstyle_mac == 2) { + int j; + for (j = 0; j < ETH_ALEN; j++) + printf("%02x%s", mac[j], + (j==ETH_ALEN-1) ? "" : ":"); + } else + printf("%s", ether_ntoa((struct ether_addr *) mac)); +} + +/* Put the mac address into 6 (ETH_ALEN) bytes returns 0 on success. */ +static void ebt_print_mac_and_mask(const unsigned char *mac, const unsigned char *mask) +{ + char hlpmsk[6] = {}; + + if (!memcmp(mac, eb_mac_type_unicast, 6) && + !memcmp(mask, eb_msk_type_unicast, 6)) + printf("Unicast"); + else if (!memcmp(mac, eb_mac_type_multicast, 6) && + !memcmp(mask, eb_msk_type_multicast, 6)) + printf("Multicast"); + else if (!memcmp(mac, eb_mac_type_broadcast, 6) && + !memcmp(mask, eb_msk_type_broadcast, 6)) + printf("Broadcast"); + else if (!memcmp(mac, eb_mac_type_bridge_group, 6) && + !memcmp(mask, eb_msk_type_bridge_group, 6)) + printf("BGA"); + else { + ebt_print_mac(mac); + if (memcmp(mask, hlpmsk, 6)) { + printf("/"); + ebt_print_mac(mask); + } + } +} + +static uint16_t ipt_to_ebt_flags(uint8_t invflags) +{ + uint16_t result = 0; + + if (invflags & IPT_INV_VIA_IN) + result |= EBT_IIN; + + if (invflags & IPT_INV_VIA_OUT) + result |= EBT_IOUT; + + if (invflags & IPT_INV_PROTO) + result |= EBT_IPROTO; + + return result; +} + +static void add_logical_iniface(struct nft_rule *r, char *iface, uint32_t op) +{ + int iface_len; + + iface_len = strlen(iface); + + add_meta(r, NFT_META_BRI_IIFNAME); + if (iface[iface_len - 1] == '+') + add_cmp_ptr(r, op, iface, iface_len - 1); + else + add_cmp_ptr(r, op, iface, iface_len + 1); +} + +static void add_logical_outiface(struct nft_rule *r, char *iface, uint32_t op) +{ + int iface_len; + + iface_len = strlen(iface); + + add_meta(r, NFT_META_BRI_OIFNAME); + if (iface[iface_len - 1] == '+') + add_cmp_ptr(r, op, iface, iface_len - 1); + else + add_cmp_ptr(r, op, iface, iface_len + 1); +} + +/* TODO: Use generic add_action() once we convert this to use + * iptables_command_state. + */ +static int _add_action(struct nft_rule *r, struct ebtables_command_state *cs) +{ + int ret = 0; + + if (cs->jumpto == NULL || strcmp(cs->jumpto, "CONTINUE") == 0) + return 0; + + /* If no target at all, add nothing (default to continue) */ + if (cs->target != NULL) { + /* Standard target? */ + if (strcmp(cs->jumpto, XTC_LABEL_ACCEPT) == 0) + ret = add_verdict(r, NF_ACCEPT); + else if (strcmp(cs->jumpto, XTC_LABEL_DROP) == 0) + ret = add_verdict(r, NF_DROP); + else if (strcmp(cs->jumpto, XTC_LABEL_RETURN) == 0) + ret = add_verdict(r, NFT_RETURN); + else + ret = add_target(r, cs->target->t); + } else if (strlen(cs->jumpto) > 0) { + /* Not standard, then it's a jump to chain */ + ret = add_jumpto(r, cs->jumpto, NFT_JUMP); + } + + return ret; +} + +static int nft_bridge_add(struct nft_rule *r, void *data) +{ + struct ebtables_command_state *cs = data; + struct ebt_match *iter; + struct ebt_entry *fw = &cs->fw; + uint32_t op; + char *addr; + + if (fw->in[0] != '\0') { + op = nft_invflags2cmp(fw->invflags, EBT_IIN); + add_iniface(r, fw->in, op); + } + + if (fw->out[0] != '\0') { + op = nft_invflags2cmp(fw->invflags, EBT_IOUT); + add_outiface(r, fw->out, op); + } + + if (fw->logical_in[0] != '\0') { + op = nft_invflags2cmp(fw->invflags, EBT_ILOGICALIN); + add_logical_iniface(r, fw->logical_in, op); + } + + if (fw->logical_out[0] != '\0') { + op = nft_invflags2cmp(fw->invflags, EBT_ILOGICALOUT); + add_logical_outiface(r, fw->logical_out, op); + } + + addr = ether_ntoa((struct ether_addr *) fw->sourcemac); + if (strcmp(addr, "0:0:0:0:0:0") != 0) { + op = nft_invflags2cmp(fw->invflags, EBT_ISOURCE); + add_payload(r, offsetof(struct ethhdr, h_source), 6, + NFT_PAYLOAD_LL_HEADER); + add_cmp_ptr(r, op, fw->sourcemac, 6); + } + + addr = ether_ntoa((struct ether_addr *) fw->destmac); + if (strcmp(addr, "0:0:0:0:0:0") != 0) { + op = nft_invflags2cmp(fw->invflags, EBT_IDEST); + add_payload(r, offsetof(struct ethhdr, h_dest), 6, + NFT_PAYLOAD_LL_HEADER); + add_cmp_ptr(r, op, fw->destmac, 6); + } + + if (fw->ethproto != 0) { + op = nft_invflags2cmp(fw->invflags, EBT_IPROTO); + add_payload(r, offsetof(struct ethhdr, h_proto), 2, + NFT_PAYLOAD_LL_HEADER); + add_cmp_u16(r, fw->ethproto, op); + } + + add_compat(r, fw->ethproto, fw->invflags); + + for (iter = cs->match_list; iter; iter = iter->next) { + if (iter->ismatch) { + if (add_match(r, iter->u.match->m)) + break; + } else { + if (add_target(r, iter->u.watcher->t)) + break; + } + } + + if (add_counters(r, cs->counters.pcnt, cs->counters.bcnt) < 0) + return -1; + + return _add_action(r, cs); +} + +static void nft_bridge_parse_meta(struct nft_xt_ctx *ctx, + struct nft_rule_expr *e, void *data) +{ + struct ebtables_command_state *cs = data; + struct ebt_entry *fw = &cs->fw; + uint8_t flags = 0; + int iface = 0; + const void *ifname; + uint32_t len; + + iface = parse_meta(e, ctx->meta.key, fw->in, fw->in_mask, + fw->out, fw->out_mask, &flags); + if (!iface) + goto out; + + switch (ctx->meta.key) { + case NFT_META_BRI_IIFNAME: + ifname = nft_rule_expr_get(e, NFT_EXPR_CMP_DATA, &len); + if (nft_rule_expr_get_u32(e, NFT_EXPR_CMP_OP) == NFT_CMP_NEQ) + flags |= IPT_INV_VIA_IN; + + memcpy(fw->logical_in, ifname, len); + + if (fw->logical_in[len] == '\0') + memset(fw->in_mask, 0xff, len); + else { + fw->logical_in[len] = '+'; + fw->logical_in[len+1] = '\0'; + memset(fw->in_mask, 0xff, len + 1); + } + break; + case NFT_META_BRI_OIFNAME: + ifname = nft_rule_expr_get(e, NFT_EXPR_CMP_DATA, &len); + if (nft_rule_expr_get_u32(e, NFT_EXPR_CMP_OP) == NFT_CMP_NEQ) + flags |= IPT_INV_VIA_OUT; + + memcpy(fw->logical_out, ifname, len); + + if (fw->logical_out[len] == '\0') + memset(fw->out_mask, 0xff, len); + else { + fw->logical_out[len] = '+'; + fw->logical_out[len+1] = '\0'; + memset(fw->out_mask, 0xff, len + 1); + } + break; + default: + break; + } + +out: + fw->invflags |= ipt_to_ebt_flags(flags); +} + +static void nft_bridge_parse_payload(struct nft_xt_ctx *ctx, + struct nft_rule_expr *e, void *data) +{ + struct ebtables_command_state *cs = data; + struct ebt_entry *fw = &cs->fw; + unsigned char addr[ETH_ALEN]; + unsigned short int ethproto; + bool inv; + int i; + + switch (ctx->payload.offset) { + case offsetof(struct ethhdr, h_dest): + get_cmp_data(e, addr, sizeof(addr), &inv); + for (i = 0; i < ETH_ALEN; i++) + fw->destmac[i] = addr[i]; + if (inv) + fw->invflags |= EBT_IDEST; + break; + case offsetof(struct ethhdr, h_source): + get_cmp_data(e, addr, sizeof(addr), &inv); + for (i = 0; i < ETH_ALEN; i++) + fw->sourcemac[i] = addr[i]; + if (inv) + fw->invflags |= EBT_ISOURCE; + break; + case offsetof(struct ethhdr, h_proto): + get_cmp_data(e, ðproto, sizeof(ethproto), &inv); + fw->ethproto = ethproto; + if (inv) + fw->invflags |= EBT_IPROTO; + break; + } +} + +static void nft_bridge_parse_immediate(const char *jumpto, bool nft_goto, + void *data) +{ + struct ebtables_command_state *cs = data; + + cs->jumpto = jumpto; +} + +static void parse_watcher(void *object, struct ebt_match **match_list, + bool ismatch) +{ + struct ebt_match *m; + + m = calloc(1, sizeof(struct ebt_match)); + if (m == NULL) + xtables_error(OTHER_PROBLEM, "Can't allocate memory"); + + if (ismatch) + m->u.match = object; + else + m->u.watcher = object; + + m->ismatch = ismatch; + if (*match_list == NULL) + *match_list = m; + else + (*match_list)->next = m; +} + +static void nft_bridge_parse_match(struct xtables_match *m, void *data) +{ + struct ebtables_command_state *cs = data; + + parse_watcher(m, &cs->match_list, true); +} + +static void nft_bridge_parse_target(struct xtables_target *t, void *data) +{ + struct ebtables_command_state *cs = data; + + /* harcoded names :-( */ + if (strcmp(t->name, "log") == 0) { + parse_watcher(t, &cs->match_list, false); + return; + } + + cs->target = t; +} + +void nft_rule_to_ebtables_command_state(struct nft_rule *r, + struct ebtables_command_state *cs) +{ + struct nft_rule_expr_iter *iter; + struct nft_rule_expr *expr; + int family = nft_rule_attr_get_u32(r, NFT_RULE_ATTR_FAMILY); + struct nft_xt_ctx ctx = { + .state.cs_eb = cs, + .family = family, + }; + + iter = nft_rule_expr_iter_create(r); + if (iter == NULL) + return; + + expr = nft_rule_expr_iter_next(iter); + while (expr != NULL) { + const char *name = + nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); + + if (strcmp(name, "counter") == 0) + nft_parse_counter(expr, &cs->counters); + else if (strcmp(name, "payload") == 0) + nft_parse_payload(&ctx, expr); + else if (strcmp(name, "meta") == 0) + nft_parse_meta(&ctx, expr); + else if (strcmp(name, "bitwise") == 0) + nft_parse_bitwise(&ctx, expr); + else if (strcmp(name, "cmp") == 0) + nft_parse_cmp(&ctx, expr); + else if (strcmp(name, "immediate") == 0) + nft_parse_immediate(&ctx, expr); + else if (strcmp(name, "match") == 0) + nft_parse_match(&ctx, expr); + else if (strcmp(name, "target") == 0) + nft_parse_target(&ctx, expr); + + expr = nft_rule_expr_iter_next(iter); + } + + nft_rule_expr_iter_destroy(iter); + + if (cs->jumpto != NULL) + return; + + if (cs->target != NULL && cs->target->name != NULL) + cs->target = xtables_find_target(cs->target->name, XTF_TRY_LOAD); + else + cs->jumpto = "CONTINUE"; +} + +static void print_iface(const char *iface) +{ + char *c; + + if ((c = strchr(iface, IF_WILDCARD))) + *c = '+'; + printf("%s ", iface); + if (c) + *c = IF_WILDCARD; +} + +static void nft_bridge_print_table_header(const char *tablename) +{ + printf("Bridge table: %s\n\n", tablename); +} + +static void nft_bridge_print_header(unsigned int format, const char *chain, + const char *pol, + const struct xt_counters *counters, + bool basechain, uint32_t refs) +{ + printf("Bridge chain: %s, entries: %u, policy: %s\n", + chain, refs, basechain ? pol : "RETURN"); +} + +static void nft_bridge_print_firewall(struct nft_rule *r, unsigned int num, + unsigned int format) +{ + struct xtables_match *matchp; + struct xtables_target *watcherp; + struct ebt_match *m; + struct ebtables_command_state cs = {}; + char *addr; + + nft_rule_to_ebtables_command_state(r, &cs); + + if (format & FMT_LINENUMBERS) + printf("%d ", num); + + /* Dont print anything about the protocol if no protocol was + * specified, obviously this means any protocol will do. */ + if (cs.fw.ethproto != 0) { + printf("-p "); + if (cs.fw.invflags & EBT_IPROTO) + printf("! "); + if (cs.fw.bitmask & EBT_802_3) + printf("Length "); + else { + struct ethertypeent *ent; + + ent = getethertypebynumber(ntohs(cs.fw.ethproto)); + if (!ent) + printf("0x%x ", ntohs(cs.fw.ethproto)); + else + printf("%s ", ent->e_name); + } + } + + addr = ether_ntoa((struct ether_addr *) cs.fw.sourcemac); + if (strcmp(addr, "0:0:0:0:0:0") != 0) { + printf("-s "); + if (cs.fw.invflags & EBT_ISOURCE) + printf("! "); + ebt_print_mac_and_mask(cs.fw.sourcemac, cs.fw.sourcemsk); + printf(" "); + } + + addr = ether_ntoa((struct ether_addr *) cs.fw.destmac); + if (strcmp(addr, "0:0:0:0:0:0") != 0) { + printf("-d "); + if (cs.fw.invflags & EBT_IDEST) + printf("! "); + ebt_print_mac_and_mask(cs.fw.destmac, cs.fw.destmsk); + printf(" "); + } + + if (cs.fw.in[0] != '\0') { + printf("-i "); + if (cs.fw.invflags & EBT_IIN) + printf("! "); + print_iface(cs.fw.in); + } + + if (cs.fw.logical_in[0] != '\0') { + printf("--logical-in "); + if (cs.fw.invflags & EBT_ILOGICALIN) + printf("! "); + print_iface(cs.fw.logical_in); + } + + if (cs.fw.logical_out[0] != '\0') { + printf("--logical-out "); + if (cs.fw.invflags & EBT_ILOGICALOUT) + printf("! "); + print_iface(cs.fw.logical_out); + } + + if (cs.fw.out[0] != '\0') { + printf("-o "); + if (cs.fw.invflags & EBT_IOUT) + printf("! "); + print_iface(cs.fw.out); + } + + for (m = cs.match_list; m; m = m->next) { + if (m->ismatch) { + matchp = m->u.match; + if (matchp->print != NULL) { + matchp->print(&cs.fw, matchp->m, + format & FMT_NUMERIC); + } + } else { + watcherp = m->u.watcher; + if (watcherp->print != NULL) { + watcherp->print(&cs.fw, watcherp->t, + format & FMT_NUMERIC); + } + } + } + + printf("-j "); + + if (cs.jumpto != NULL) + printf("%s", cs.jumpto); + else if (cs.target != NULL && cs.target->print != NULL) + cs.target->print(&cs.fw, cs.target->t, format & FMT_NUMERIC); + + if (!(format & FMT_NOCOUNTS)) + printf(" , pcnt = %"PRIu64" -- bcnt = %"PRIu64"", + (uint64_t)cs.counters.pcnt, (uint64_t)cs.counters.bcnt); + + if (!(format & FMT_NONEWLINE)) + fputc('\n', stdout); + + ebt_cs_clean(&cs); +} + +static bool nft_bridge_is_same(const void *data_a, const void *data_b) +{ + const struct ebt_entry *a = data_a; + const struct ebt_entry *b = data_b; + int i; + + if (a->ethproto != b->ethproto || + /* FIXME: a->flags != b->flags || */ + a->invflags != b->invflags) { + DEBUGP("different proto/flags/invflags\n"); + return false; + } + + for (i = 0; i < ETH_ALEN; i++) { + if (a->sourcemac[i] != b->sourcemac[i]) { + DEBUGP("different source mac %x, %x (%d)\n", + a->sourcemac[i] & 0xff, b->sourcemac[i] & 0xff, i); + return false; + } + + if (a->destmac[i] != b->destmac[i]) { + DEBUGP("different destination mac %x, %x (%d)\n", + a->destmac[i] & 0xff, b->destmac[i] & 0xff, i); + return false; + } + } + + for (i = 0; i < IFNAMSIZ; i++) { + if (a->logical_in[i] != b->logical_in[i]) { + DEBUGP("different logical iniface %x, %x (%d)\n", + a->logical_in[i] & 0xff, b->logical_in[i] & 0xff, i); + return false; + } + + if (a->logical_out[i] != b->logical_out[i]) { + DEBUGP("different logical outiface %x, %x (%d)\n", + a->logical_out[i] & 0xff, b->logical_out[i] & 0xff, i); + return false; + } + } + + return is_same_interfaces((char *)a->in, + (char *)a->out, + a->in_mask, + a->out_mask, + (char *)b->in, + (char *)b->out, + b->in_mask, + b->out_mask); +} + +static bool nft_bridge_rule_find(struct nft_family_ops *ops, struct nft_rule *r, + void *data) +{ + struct ebtables_command_state *cs = data; + struct ebtables_command_state this = {}; + + nft_rule_to_ebtables_command_state(r, &this); + + DEBUGP("comparing with... "); + + if (!nft_bridge_is_same(cs, &this)) + return false; + + if (!compare_matches(cs->matches, this.matches)) { + DEBUGP("Different matches\n"); + return false; + } + + if (!compare_targets(cs->target, this.target)) { + DEBUGP("Different target\n"); + return false; + } + + if (strcmp(cs->jumpto, this.jumpto) != 0) { + DEBUGP("Different verdict\n"); + return false; + } + + return true; +} + +struct nft_family_ops nft_family_ops_bridge = { + .add = nft_bridge_add, + .is_same = nft_bridge_is_same, + .print_payload = NULL, + .parse_meta = nft_bridge_parse_meta, + .parse_payload = nft_bridge_parse_payload, + .parse_immediate = nft_bridge_parse_immediate, + .parse_match = nft_bridge_parse_match, + .parse_target = nft_bridge_parse_target, + .print_table_header = nft_bridge_print_table_header, + .print_header = nft_bridge_print_header, + .print_firewall = nft_bridge_print_firewall, + .save_firewall = NULL, + .save_counters = NULL, + .post_parse = NULL, + .rule_find = nft_bridge_rule_find, +}; diff --git a/iptables/nft-bridge.h b/iptables/nft-bridge.h new file mode 100644 index 00000000..1c4a96ea --- /dev/null +++ b/iptables/nft-bridge.h @@ -0,0 +1,171 @@ +#ifndef _NFT_BRIDGE_H_ +#define _NFT_BRIDGE_H_ + +#include <netinet/in.h> +//#include <linux/netfilter_bridge/ebtables.h> +#include <linux/netfilter/x_tables.h> +#include <linux/netfilter/nf_tables.h> +#include <net/ethernet.h> +#include <libiptc/libxtc.h> + +/* We use replace->flags, so we can't use the following values: + * 0x01 == OPT_COMMAND, 0x02 == OPT_TABLE, 0x100 == OPT_ZERO */ +#define LIST_N 0x04 +#define LIST_C 0x08 +#define LIST_X 0x10 +#define LIST_MAC2 0x20 + +/* Be backwards compatible, so don't use '+' in kernel */ +#define IF_WILDCARD 1 + +extern unsigned char eb_mac_type_unicast[ETH_ALEN]; +extern unsigned char eb_msk_type_unicast[ETH_ALEN]; +extern unsigned char eb_mac_type_multicast[ETH_ALEN]; +extern unsigned char eb_msk_type_multicast[ETH_ALEN]; +extern unsigned char eb_mac_type_broadcast[ETH_ALEN]; +extern unsigned char eb_msk_type_broadcast[ETH_ALEN]; +extern unsigned char eb_mac_type_bridge_group[ETH_ALEN]; +extern unsigned char eb_msk_type_bridge_group[ETH_ALEN]; + +int ebt_get_mac_and_mask(const char *from, unsigned char *to, unsigned char *mask); + +/* From: include/linux/netfilter_bridge/ebtables.h + * + * Adapted for the need of the ebtables-compat. + */ + +#define EBT_TABLE_MAXNAMELEN 32 +#define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN +#define EBT_FUNCTION_MAXNAMELEN EBT_TABLE_MAXNAMELEN + +/* verdicts >0 are "branches" */ +#define EBT_ACCEPT -1 +#define EBT_DROP -2 +#define EBT_CONTINUE -3 +#define EBT_RETURN -4 +#define NUM_STANDARD_TARGETS 4 + +#define EBT_ENTRY_OR_ENTRIES 0x01 +/* these are the normal masks */ +#define EBT_NOPROTO 0x02 +#define EBT_802_3 0x04 +#define EBT_SOURCEMAC 0x08 +#define EBT_DESTMAC 0x10 +#define EBT_F_MASK (EBT_NOPROTO | EBT_802_3 | EBT_SOURCEMAC | EBT_DESTMAC \ + | EBT_ENTRY_OR_ENTRIES) + +#define EBT_IPROTO 0x01 +#define EBT_IIN 0x02 +#define EBT_IOUT 0x04 +#define EBT_ISOURCE 0x8 +#define EBT_IDEST 0x10 +#define EBT_ILOGICALIN 0x20 +#define EBT_ILOGICALOUT 0x40 +#define EBT_INV_MASK (EBT_IPROTO | EBT_IIN | EBT_IOUT | EBT_ILOGICALIN \ + | EBT_ILOGICALOUT | EBT_ISOURCE | EBT_IDEST) + +/* ebtables target modules store the verdict inside an int. We can + * reclaim a part of this int for backwards compatible extensions. + * The 4 lsb are more than enough to store the verdict. + */ +#define EBT_VERDICT_BITS 0x0000000F + +/* Fake ebt_entry */ +struct ebt_entry { + /* this needs to be the first field */ + unsigned int bitmask; + unsigned int invflags; + uint16_t ethproto; + /* the physical in-dev */ + char in[IFNAMSIZ]; + /* the logical in-dev */ + char logical_in[IFNAMSIZ]; + /* the physical out-dev */ + char out[IFNAMSIZ]; + /* the logical out-dev */ + char logical_out[IFNAMSIZ]; + unsigned char sourcemac[ETH_ALEN]; + unsigned char sourcemsk[ETH_ALEN]; + unsigned char destmac[ETH_ALEN]; + unsigned char destmsk[ETH_ALEN]; + + unsigned char in_mask[IFNAMSIZ]; + unsigned char out_mask[IFNAMSIZ]; +}; + +/* trick for ebtables-compat, since watchers are targets */ +struct ebt_match { + struct ebt_match *next; + union { + struct xtables_match *match; + struct xtables_target *watcher; + } u; + bool ismatch; +}; + +struct ebtables_command_state { + struct ebt_entry fw; + struct xtables_target *target; + struct xtables_rule_match *matches; + struct ebt_match *match_list; + const char *jumpto; + struct xt_counters counters; + int invert; + int c; + char **argv; + int proto_used; + char *protocol; + unsigned int options; +}; + +void nft_rule_to_ebtables_command_state(struct nft_rule *r, + struct ebtables_command_state *cs); + +static const char *ebt_standard_targets[NUM_STANDARD_TARGETS] = { + "ACCEPT", + "DROP", + "CONTINUE", + "RETURN", +}; + +static inline const char *nft_ebt_standard_target(unsigned int num) +{ + if (num > NUM_STANDARD_TARGETS) + return NULL; + + return ebt_standard_targets[num]; +} + +static inline int ebt_fill_target(const char *str, unsigned int *verdict) +{ + int i, ret = 0; + + for (i = 0; i < NUM_STANDARD_TARGETS; i++) { + if (!strcmp(str, nft_ebt_standard_target(i))) { + *verdict = -i - 1; + break; + } + } + + if (i == NUM_STANDARD_TARGETS) + ret = 1; + + return ret; +} + +static inline const char *ebt_target_name(unsigned int verdict) +{ + return nft_ebt_standard_target(-verdict - 1); +} + +#define EBT_CHECK_OPTION(flags, mask) ({ \ + if (*flags & mask) \ + xtables_error(PARAMETER_PROBLEM, \ + "Multiple use of same " \ + "option not allowed"); \ + *flags |= mask; \ +}) \ + +void ebt_cs_clean(struct ebtables_command_state *cs); + +#endif diff --git a/iptables/nft-ipv4.c b/iptables/nft-ipv4.c index 1b0dc2a1..ed309207 100644 --- a/iptables/nft-ipv4.c +++ b/iptables/nft-ipv4.c @@ -60,7 +60,8 @@ static int nft_ipv4_add(struct nft_rule *r, void *data) sizeof(struct in_addr), op); } if (cs->fw.ip.flags & IPT_F_FRAG) { - add_payload(r, offsetof(struct iphdr, frag_off), 2); + add_payload(r, offsetof(struct iphdr, frag_off), 2, + NFT_PAYLOAD_NETWORK_HEADER); /* get the 13 bits that contain the fragment offset */ add_bitwise_u16(r, 0x1fff, !0x1fff); diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c index d4a54bee..620da3e7 100644 --- a/iptables/nft-shared.c +++ b/iptables/nft-shared.c @@ -26,12 +26,14 @@ #include <libnftnl/expr.h> #include "nft-shared.h" +#include "nft-bridge.h" #include "xshared.h" #include "nft.h" extern struct nft_family_ops nft_family_ops_ipv4; extern struct nft_family_ops nft_family_ops_ipv6; extern struct nft_family_ops nft_family_ops_arp; +extern struct nft_family_ops nft_family_ops_bridge; void add_meta(struct nft_rule *r, uint32_t key) { @@ -47,7 +49,7 @@ void add_meta(struct nft_rule *r, uint32_t key) nft_rule_add_expr(r, expr); } -void add_payload(struct nft_rule *r, int offset, int len) +void add_payload(struct nft_rule *r, int offset, int len, uint32_t base) { struct nft_rule_expr *expr; @@ -55,8 +57,7 @@ void add_payload(struct nft_rule *r, int offset, int len) if (expr == NULL) return; - nft_rule_expr_set_u32(expr, NFT_EXPR_PAYLOAD_BASE, - NFT_PAYLOAD_NETWORK_HEADER); + nft_rule_expr_set_u32(expr, NFT_EXPR_PAYLOAD_BASE, base); nft_rule_expr_set_u32(expr, NFT_EXPR_PAYLOAD_DREG, NFT_REG_1); nft_rule_expr_set_u32(expr, NFT_EXPR_PAYLOAD_OFFSET, offset); nft_rule_expr_set_u32(expr, NFT_EXPR_PAYLOAD_LEN, len); @@ -159,7 +160,7 @@ void add_outiface(struct nft_rule *r, char *iface, uint32_t op) void add_addr(struct nft_rule *r, int offset, void *data, void *mask, size_t len, uint32_t op) { - add_payload(r, offset, len); + add_payload(r, offset, len, NFT_PAYLOAD_NETWORK_HEADER); add_bitwise(r, mask, len); add_cmp_ptr(r, op, data, len); @@ -168,7 +169,7 @@ void add_addr(struct nft_rule *r, int offset, void add_proto(struct nft_rule *r, int offset, size_t len, uint8_t proto, uint32_t op) { - add_payload(r, offset, len); + add_payload(r, offset, len, NFT_PAYLOAD_NETWORK_HEADER); add_cmp_u8(r, proto, op); } @@ -206,7 +207,7 @@ bool is_same_interfaces(const char *a_iniface, const char *a_outiface, return true; } -void parse_meta(struct nft_rule_expr *e, uint8_t key, char *iniface, +int parse_meta(struct nft_rule_expr *e, uint8_t key, char *iniface, unsigned char *iniface_mask, char *outiface, unsigned char *outiface_mask, uint8_t *invflags) { @@ -264,9 +265,10 @@ void parse_meta(struct nft_rule_expr *e, uint8_t key, char *iniface, } break; default: - DEBUGP("unknown meta key %d\n", key); - break; + return -1; } + + return 0; } static void *nft_get_data(struct nft_xt_ctx *ctx) @@ -277,6 +279,8 @@ static void *nft_get_data(struct nft_xt_ctx *ctx) return ctx->state.cs; case NFPROTO_ARP: return ctx->state.cs_arp; + case NFPROTO_BRIDGE: + return ctx->state.cs_eb; default: /* Should not happen */ return NULL; @@ -316,15 +320,31 @@ void nft_parse_target(struct nft_xt_ctx *ctx, struct nft_rule_expr *e) ops->parse_target(target, data); } -static void nft_parse_match(struct nft_xt_ctx *ctx, struct nft_rule_expr *e) +void nft_parse_match(struct nft_xt_ctx *ctx, struct nft_rule_expr *e) { uint32_t mt_len; const char *mt_name = nft_rule_expr_get_str(e, NFT_EXPR_MT_NAME); const void *mt_info = nft_rule_expr_get(e, NFT_EXPR_MT_INFO, &mt_len); struct xtables_match *match; + struct xtables_rule_match **matches; struct xt_entry_match *m; + struct nft_family_ops *ops; - match = xtables_find_match(mt_name, XTF_TRY_LOAD, &ctx->state.cs->matches); + switch (ctx->family) { + case NFPROTO_IPV4: + case NFPROTO_IPV6: + matches = &ctx->state.cs->matches; + break; + case NFPROTO_BRIDGE: + matches = &ctx->state.cs_eb->matches; + break; + default: + fprintf(stderr, "BUG: nft_parse_match() unknown family %d\n", + ctx->family); + exit(EXIT_FAILURE); + } + + match = xtables_find_match(mt_name, XTF_TRY_LOAD, matches); if (match == NULL) return; @@ -340,6 +360,10 @@ static void nft_parse_match(struct nft_xt_ctx *ctx, struct nft_rule_expr *e) strcpy(m->u.user.name, match->name); match->m = m; + + ops = nft_family_ops_lookup(ctx->family); + if (ops->parse_match != NULL) + ops->parse_match(match, nft_get_data(ctx)); } void print_proto(uint16_t proto, int invert) @@ -734,6 +758,8 @@ struct nft_family_ops *nft_family_ops_lookup(int family) return &nft_family_ops_ipv6; case NFPROTO_ARP: return &nft_family_ops_arp; + case NFPROTO_BRIDGE: + return &nft_family_ops_bridge; default: break; } @@ -741,8 +767,8 @@ struct nft_family_ops *nft_family_ops_lookup(int family) return NULL; } -static bool -compare_matches(struct xtables_rule_match *mt1, struct xtables_rule_match *mt2) +bool compare_matches(struct xtables_rule_match *mt1, + struct xtables_rule_match *mt2) { struct xtables_rule_match *mp1; struct xtables_rule_match *mp2; diff --git a/iptables/nft-shared.h b/iptables/nft-shared.h index 1b16d4e0..fbce5b5d 100644 --- a/iptables/nft-shared.h +++ b/iptables/nft-shared.h @@ -48,6 +48,7 @@ struct nft_xt_ctx { union { struct iptables_command_state *cs; struct arptables_command_state *cs_arp; + struct ebtables_command_state *cs_eb; } state; struct nft_rule_expr_iter *iter; int family; @@ -83,6 +84,7 @@ struct nft_family_ops { void *data); void (*parse_immediate)(const char *jumpto, bool nft_goto, void *data); + void (*print_table_header)(const char *tablename); void (*print_header)(unsigned int format, const char *chain, const char *pol, const struct xt_counters *counters, bool basechain, @@ -95,13 +97,14 @@ struct nft_family_ops { struct xtables_args *args); void (*post_parse)(int command, struct iptables_command_state *cs, struct xtables_args *args); + void (*parse_match)(struct xtables_match *m, void *data); void (*parse_target)(struct xtables_target *t, void *data); bool (*rule_find)(struct nft_family_ops *ops, struct nft_rule *r, void *data); }; void add_meta(struct nft_rule *r, uint32_t key); -void add_payload(struct nft_rule *r, int offset, int len); +void add_payload(struct nft_rule *r, int offset, int len, uint32_t base); void add_bitwise_u16(struct nft_rule *r, int mask, int xor); void add_cmp_ptr(struct nft_rule *r, uint32_t op, void *data, size_t len); void add_cmp_u8(struct nft_rule *r, uint8_t val, uint32_t op); @@ -122,13 +125,14 @@ bool is_same_interfaces(const char *a_iniface, const char *a_outiface, unsigned const char *b_iniface_mask, unsigned const char *b_outiface_mask); -void parse_meta(struct nft_rule_expr *e, uint8_t key, char *iniface, +int parse_meta(struct nft_rule_expr *e, uint8_t key, char *iniface, unsigned char *iniface_mask, char *outiface, unsigned char *outiface_mask, uint8_t *invflags); void print_proto(uint16_t proto, int invert); void get_cmp_data(struct nft_rule_expr *e, void *data, size_t dlen, bool *inv); void nft_parse_bitwise(struct nft_xt_ctx *ctx, struct nft_rule_expr *e); void nft_parse_cmp(struct nft_xt_ctx *ctx, struct nft_rule_expr *e); +void nft_parse_match(struct nft_xt_ctx *ctx, struct nft_rule_expr *e); void nft_parse_target(struct nft_xt_ctx *ctx, struct nft_rule_expr *e); void nft_parse_meta(struct nft_xt_ctx *ctx, struct nft_rule_expr *e); void nft_parse_payload(struct nft_xt_ctx *ctx, struct nft_rule_expr *e); @@ -165,6 +169,7 @@ struct nft_handle; bool nft_ipv46_rule_find(struct nft_family_ops *ops, struct nft_rule *r, struct iptables_command_state *cs); +bool compare_matches(struct xtables_rule_match *mt1, struct xtables_rule_match *mt2); bool compare_targets(struct xtables_target *tg1, struct xtables_target *tg2); struct addr_mask { diff --git a/iptables/nft.c b/iptables/nft.c index 568faa19..7cd56efa 100644 --- a/iptables/nft.c +++ b/iptables/nft.c @@ -469,6 +469,57 @@ struct builtin_table xtables_arp[TABLES_MAX] = { }, }; +#include <linux/netfilter_bridge.h> + +struct builtin_table xtables_bridge[TABLES_MAX] = { + [FILTER] = { + .name = "filter", + .chains = { + { + .name = "INPUT", + .type = "filter", + .prio = NF_BR_PRI_FILTER_BRIDGED, + .hook = NF_BR_LOCAL_IN, + }, + { + .name = "FORWARD", + .type = "filter", + .prio = NF_BR_PRI_FILTER_BRIDGED, + .hook = NF_BR_FORWARD, + }, + { + .name = "OUTPUT", + .type = "filter", + .prio = NF_BR_PRI_FILTER_BRIDGED, + .hook = NF_BR_LOCAL_OUT, + }, + }, + }, + [NAT] = { + .name = "nat", + .chains = { + { + .name = "PREROUTING", + .type = "filter", + .prio = NF_BR_PRI_NAT_DST_BRIDGED, + .hook = NF_BR_PRE_ROUTING, + }, + { + .name = "OUTPUT", + .type = "filter", + .prio = NF_BR_PRI_NAT_DST_OTHER, + .hook = NF_BR_LOCAL_OUT, + }, + { + .name = "POSTROUTING", + .type = "filter", + .prio = NF_BR_PRI_NAT_SRC, + .hook = NF_BR_POST_ROUTING, + }, + }, + }, +}; + int nft_table_add(struct nft_handle *h, struct nft_table *t, uint16_t flags) { char buf[MNL_SOCKET_BUFFER_SIZE]; @@ -587,7 +638,7 @@ nft_table_builtin_find(struct nft_handle *h, const char *table) for (i=0; i<TABLES_MAX; i++) { if (h->tables[i].name == NULL) - break; + continue; if (strcmp(h->tables[i].name, table) != 0) continue; @@ -1968,6 +2019,9 @@ int nft_rule_list(struct nft_handle *h, const char *chain, const char *table, if (iter == NULL) goto err; + if (ops->print_table_header) + ops->print_table_header(table); + c = nft_chain_list_iter_next(iter); while (c != NULL) { const char *chain_table = diff --git a/iptables/nft.h b/iptables/nft.h index 9f6561f5..ab3d64ac 100644 --- a/iptables/nft.h +++ b/iptables/nft.h @@ -41,6 +41,7 @@ struct nft_handle { extern struct builtin_table xtables_ipv4[TABLES_MAX]; extern struct builtin_table xtables_arp[TABLES_MAX]; +extern struct builtin_table xtables_bridge[TABLES_MAX]; int mnl_talk(struct nft_handle *h, struct nlmsghdr *nlh, int (*cb)(const struct nlmsghdr *nlh, void *data), @@ -135,6 +136,8 @@ const char *nft_strerror(int err); int do_commandx(struct nft_handle *h, int argc, char *argv[], char **table, bool restore); /* For xtables-arptables.c */ int do_commandarp(struct nft_handle *h, int argc, char *argv[], char **table); +/* For xtables-eb.c */ +int do_commandeb(struct nft_handle *h, int argc, char *argv[], char **table); /* * Parse config for tables and chain helper functions diff --git a/iptables/xtables-compat-multi.c b/iptables/xtables-compat-multi.c index 47810524..ed8ad07f 100644 --- a/iptables/xtables-compat-multi.c +++ b/iptables/xtables-compat-multi.c @@ -28,6 +28,7 @@ static const struct subcommand multi_subcommands[] = { {"ip6tables-compat-restore", xtables_ip6_restore_main}, {"arptables", xtables_arp_main}, {"arptables-compat", xtables_arp_main}, + {"ebtables-compat", xtables_eb_main}, {"xtables-config", xtables_config_main}, {"xtables-events", xtables_events_main}, {NULL}, diff --git a/iptables/xtables-eb-standalone.c b/iptables/xtables-eb-standalone.c new file mode 100644 index 00000000..914d137b --- /dev/null +++ b/iptables/xtables-eb-standalone.c @@ -0,0 +1,74 @@ +/* + * Author: Paul.Russell@rustcorp.com.au and mneuling@radlogic.com.au + * + * Based on the ipchains code by Paul Russell and Michael Neuling + * + * (C) 2000-2002 by the netfilter coreteam <coreteam@netfilter.org>: + * Paul 'Rusty' Russell <rusty@rustcorp.com.au> + * Marc Boucher <marc+nf@mbsi.ca> + * James Morris <jmorris@intercode.com.au> + * Harald Welte <laforge@gnumonks.org> + * Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> + * + * arptables -- IP firewall administration for kernels with + * firewall table (aimed for the 2.3 kernels) + * + * See the accompanying manual page arptables(8) for information + * about proper usage of this program. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <xtables.h> +#include <iptables.h> +#include "nft.h" + +#include "xtables-multi.h" + +extern struct xtables_globals ebtables_globals; + +int xtables_eb_main(int argc, char *argv[]) +{ + int ret; + char *table = "filter"; + struct nft_handle h = { + .family = NFPROTO_BRIDGE, + }; + + ebtables_globals.program_name = "ebtables"; + ret = xtables_init_all(&ebtables_globals, NFPROTO_BRIDGE); + if (ret < 0) { + fprintf(stderr, "%s/%s Failed to initialize ebtables-compat\n", + ebtables_globals.program_name, + ebtables_globals.program_version); + exit(1); + } + +#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS) + init_extensionsb(); +#endif + ret = do_commandeb(&h, argc, argv, &table); + if (ret) + ret = nft_commit(&h); + + if (!ret) + fprintf(stderr, "%s\n", nft_strerror(errno)); + + exit(!ret); +} diff --git a/iptables/xtables-eb.c b/iptables/xtables-eb.c new file mode 100644 index 00000000..efbb3cd0 --- /dev/null +++ b/iptables/xtables-eb.c @@ -0,0 +1,1366 @@ +/* + * ebtables.c, v2.0 July 2002 + * + * Author: Bart De Schuymer + * + * This code was stongly inspired on the iptables code which is + * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <ctype.h> +#include <errno.h> +#include <getopt.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> +#include <inttypes.h> +#include <signal.h> +#include <net/if.h> +#include <netinet/ether.h> +#include <iptables.h> +#include <xtables.h> + +#include <linux/netfilter_bridge.h> +#include <linux/netfilter/nf_tables.h> +#include <ebtables/ethernetdb.h> +#include <libiptc/libxtc.h> +#include "xshared.h" +#include "nft.h" +#include "nft-bridge.h" + +/* + * From include/ebtables_u.h + */ +#define EXEC_STYLE_PRG 0 +#define EXEC_STYLE_DAEMON 1 + +#define ebt_check_option2(flags, mask) EBT_CHECK_OPTION(flags, mask) + +/* + * From useful_functions.c + */ + +/* 0: default + * 1: the inverse '!' of the option has already been specified */ +int ebt_invert = 0; + +unsigned char eb_mac_type_unicast[ETH_ALEN] = {0,0,0,0,0,0}; +unsigned char eb_msk_type_unicast[ETH_ALEN] = {1,0,0,0,0,0}; +unsigned char eb_mac_type_multicast[ETH_ALEN] = {1,0,0,0,0,0}; +unsigned char eb_msk_type_multicast[ETH_ALEN] = {1,0,0,0,0,0}; +unsigned char eb_mac_type_broadcast[ETH_ALEN] = {255,255,255,255,255,255}; +unsigned char eb_msk_type_broadcast[ETH_ALEN] = {255,255,255,255,255,255}; +unsigned char eb_mac_type_bridge_group[ETH_ALEN] = {0x01,0x80,0xc2,0,0,0}; +unsigned char eb_msk_type_bridge_group[ETH_ALEN] = {255,255,255,255,255,255}; + +int ebt_get_mac_and_mask(const char *from, unsigned char *to, + unsigned char *mask) +{ + char *p; + int i; + struct ether_addr *addr = NULL; + + if (strcasecmp(from, "Unicast") == 0) { + memcpy(to, eb_mac_type_unicast, ETH_ALEN); + memcpy(mask, eb_msk_type_unicast, ETH_ALEN); + return 0; + } + if (strcasecmp(from, "Multicast") == 0) { + memcpy(to, eb_mac_type_multicast, ETH_ALEN); + memcpy(mask, eb_msk_type_multicast, ETH_ALEN); + return 0; + } + if (strcasecmp(from, "Broadcast") == 0) { + memcpy(to, eb_mac_type_broadcast, ETH_ALEN); + memcpy(mask, eb_msk_type_broadcast, ETH_ALEN); + return 0; + } + if (strcasecmp(from, "BGA") == 0) { + memcpy(to, eb_mac_type_bridge_group, ETH_ALEN); + memcpy(mask, eb_msk_type_bridge_group, ETH_ALEN); + return 0; + } + if ( (p = strrchr(from, '/')) != NULL) { + *p = '\0'; + if (!(addr = ether_aton(p + 1))) + return -1; + memcpy(mask, addr, ETH_ALEN); + } else + memset(mask, 0xff, ETH_ALEN); + if (!(addr = ether_aton(from))) + return -1; + memcpy(to, addr, ETH_ALEN); + for (i = 0; i < ETH_ALEN; i++) + to[i] &= mask[i]; + return 0; +} + +static int ebt_check_inverse2(const char option[], int argc, char **argv) +{ + if (!option) + return ebt_invert; + if (strcmp(option, "!") == 0) { + if (ebt_invert == 1) + xtables_error(PARAMETER_PROBLEM, + "Double use of '!' not allowed"); + if (optind >= argc) + optarg = NULL; + else + optarg = argv[optind]; + optind++; + ebt_invert = 1; + return 1; + } + return ebt_invert; +} + +/* + * Glue code to use libxtables + */ +static int parse_rule_number(const char *rule) +{ + unsigned int rule_nr; + + if (!xtables_strtoui(rule, NULL, &rule_nr, 1, INT_MAX)) + xtables_error(PARAMETER_PROBLEM, + "Invalid rule number `%s'", rule); + + return rule_nr; +} + +static const char * +parse_target(const char *targetname) +{ + const char *ptr; + + if (strlen(targetname) < 1) + xtables_error(PARAMETER_PROBLEM, + "Invalid target name (too short)"); + + if (strlen(targetname)+1 > EBT_CHAIN_MAXNAMELEN) + xtables_error(PARAMETER_PROBLEM, + "Invalid target '%s' (%d chars max)", + targetname, EBT_CHAIN_MAXNAMELEN); + + for (ptr = targetname; *ptr; ptr++) + if (isspace(*ptr)) + xtables_error(PARAMETER_PROBLEM, + "Invalid target name `%s'", targetname); + return targetname; +} + +static int +append_entry(struct nft_handle *h, + const char *chain, + const char *table, + struct ebtables_command_state *cs, + int rule_nr, + bool verbose, bool append) +{ + int ret = 1; + + if (append) + ret = nft_rule_append(h, chain, table, cs, 0, verbose); + else + ret = nft_rule_insert(h, chain, table, cs, rule_nr, verbose); + + return ret; +} + +static int +delete_entry(struct nft_handle *h, + const char *chain, + const char *table, + struct ebtables_command_state *cs, + int rule_nr, + int rule_nr_end, + bool verbose) +{ + int ret = 1; + + if (rule_nr == -1) + ret = nft_rule_delete(h, chain, table, cs, verbose); + else { + do { + ret = nft_rule_delete_num(h, chain, table, + rule_nr, verbose); + rule_nr++; + } while (rule_nr < rule_nr_end); + } + + return ret; +} + +static int get_current_chain(const char *chain) +{ + if (strcmp(chain, "PREROUTING") == 0) + return NF_BR_PRE_ROUTING; + else if (strcmp(chain, "INPUT") == 0) + return NF_BR_LOCAL_IN; + else if (strcmp(chain, "FORWARD") == 0) + return NF_BR_FORWARD; + else if (strcmp(chain, "OUTPUT") == 0) + return NF_BR_LOCAL_OUT; + else if (strcmp(chain, "POSTROUTING") == 0) + return NF_BR_POST_ROUTING; + + return -1; +} + +/* + * The original ebtables parser + */ + +/* Checks whether a command has already been specified */ +#define OPT_COMMANDS (flags & OPT_COMMAND || flags & OPT_ZERO) + +#define OPT_COMMAND 0x01 +#define OPT_TABLE 0x02 +#define OPT_IN 0x04 +#define OPT_OUT 0x08 +#define OPT_JUMP 0x10 +#define OPT_PROTOCOL 0x20 +#define OPT_SOURCE 0x40 +#define OPT_DEST 0x80 +#define OPT_ZERO 0x100 +#define OPT_LOGICALIN 0x200 +#define OPT_LOGICALOUT 0x400 +#define OPT_KERNELDATA 0x800 /* This value is also defined in ebtablesd.c */ +#define OPT_COUNT 0x1000 /* This value is also defined in libebtc.c */ +#define OPT_CNT_INCR 0x2000 /* This value is also defined in libebtc.c */ +#define OPT_CNT_DECR 0x4000 /* This value is also defined in libebtc.c */ + +/* Default command line options. Do not mess around with the already + * assigned numbers unless you know what you are doing */ +static struct option ebt_original_options[] = +{ + { "append" , required_argument, 0, 'A' }, + { "insert" , required_argument, 0, 'I' }, + { "delete" , required_argument, 0, 'D' }, + { "list" , optional_argument, 0, 'L' }, + { "Lc" , no_argument , 0, 4 }, + { "Ln" , no_argument , 0, 5 }, + { "Lx" , no_argument , 0, 6 }, + { "Lmac2" , no_argument , 0, 12 }, + { "zero" , optional_argument, 0, 'Z' }, + { "flush" , optional_argument, 0, 'F' }, + { "policy" , required_argument, 0, 'P' }, + { "in-interface" , required_argument, 0, 'i' }, + { "in-if" , required_argument, 0, 'i' }, + { "logical-in" , required_argument, 0, 2 }, + { "logical-out" , required_argument, 0, 3 }, + { "out-interface" , required_argument, 0, 'o' }, + { "out-if" , required_argument, 0, 'o' }, + { "version" , no_argument , 0, 'V' }, + { "help" , no_argument , 0, 'h' }, + { "jump" , required_argument, 0, 'j' }, + { "set-counters" , required_argument, 0, 'c' }, + { "change-counters", required_argument, 0, 'C' }, + { "proto" , required_argument, 0, 'p' }, + { "protocol" , required_argument, 0, 'p' }, + { "db" , required_argument, 0, 'b' }, + { "source" , required_argument, 0, 's' }, + { "src" , required_argument, 0, 's' }, + { "destination" , required_argument, 0, 'd' }, + { "dst" , required_argument, 0, 'd' }, + { "table" , required_argument, 0, 't' }, + { "modprobe" , required_argument, 0, 'M' }, + { "new-chain" , required_argument, 0, 'N' }, + { "rename-chain" , required_argument, 0, 'E' }, + { "delete-chain" , optional_argument, 0, 'X' }, + { "atomic-init" , no_argument , 0, 7 }, + { "atomic-commit" , no_argument , 0, 8 }, + { "atomic-file" , required_argument, 0, 9 }, + { "atomic-save" , no_argument , 0, 10 }, + { "init-table" , no_argument , 0, 11 }, + { "concurrent" , no_argument , 0, 13 }, + { 0 } +}; + +void xtables_exit_error(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); + +struct xtables_globals ebtables_globals = { + .option_offset = 0, + .program_version = IPTABLES_VERSION, + .orig_opts = ebt_original_options, + .exit_err = xtables_exit_error, + .compat_rev = nft_compatible_revision, +}; + +#define opts ebtables_globals.opts +#define prog_name ebtables_globals.program_name +#define prog_vers ebtables_globals.program_version + +/* + * From libebtc.c + */ + +/* Prints all registered extensions */ +static void ebt_list_extensions(const struct xtables_target *t, + const struct xtables_rule_match *m) +{ + printf("%s v%s\n", prog_name, prog_vers); + printf("Loaded userspace extensions:\n"); + /*printf("\nLoaded tables:\n"); + while (tbl) { + printf("%s\n", tbl->name); + tbl = tbl->next; + }*/ + printf("\nLoaded targets:\n"); + for (t = xtables_targets; t; t = t->next) { + printf("%s\n", t->name); + } + printf("\nLoaded matches:\n"); + for (; m != NULL; m = m->next) + printf("%s\n", m->match->name); + /*printf("\nLoaded watchers:\n"); + while (w) { + printf("%s\n", w->name); + w = w->next; + }*/ +} + +#define OPTION_OFFSET 256 +static struct option *merge_options(struct option *oldopts, + const struct option *newopts, + unsigned int *options_offset) +{ + unsigned int num_old, num_new, i; + struct option *merge; + + if (!newopts || !oldopts || !options_offset) + return oldopts; + for (num_old = 0; oldopts[num_old].name; num_old++); + for (num_new = 0; newopts[num_new].name; num_new++); + + ebtables_globals.option_offset += OPTION_OFFSET; + *options_offset = ebtables_globals.option_offset; + + merge = malloc(sizeof(struct option) * (num_new + num_old + 1)); + if (!merge) + return NULL; + memcpy(merge, oldopts, num_old * sizeof(struct option)); + for (i = 0; i < num_new; i++) { + merge[num_old + i] = newopts[i]; + merge[num_old + i].val += *options_offset; + } + memset(merge + num_old + num_new, 0, sizeof(struct option)); + /* Only free dynamically allocated stuff */ + if (oldopts != ebt_original_options) + free(oldopts); + + return merge; +} + +/* + * More glue code. + */ +static struct xtables_target *command_jump(struct ebtables_command_state *cs, + const char *jumpto) +{ + struct xtables_target *target; + size_t size; + + /* XTF_TRY_LOAD (may be chain name) */ + target = xtables_find_target(jumpto, XTF_TRY_LOAD); + + if (!target) + return NULL; + + size = XT_ALIGN(sizeof(struct xt_entry_target)) + + target->size; + + target->t = xtables_calloc(1, size); + target->t->u.target_size = size; + strncpy(target->t->u.user.name, jumpto, sizeof(target->t->u.user.name)); + target->t->u.user.name[sizeof(target->t->u.user.name)-1] = '\0'; + target->t->u.user.revision = target->revision; + + xs_init_target(target); + + opts = merge_options(opts, target->extra_opts, &target->option_offset); + if (opts == NULL) + xtables_error(OTHER_PROBLEM, "Can't alloc memory"); + + return target; +} + +static void print_help(const struct xtables_target *t, + const struct xtables_rule_match *m, const char *table) +{ + printf("%s %s\n", prog_name, prog_vers); + printf( +"Usage:\n" +"ebtables -[ADI] chain rule-specification [options]\n" +"ebtables -P chain target\n" +"ebtables -[LFZ] [chain]\n" +"ebtables -[NX] [chain]\n" +"ebtables -E old-chain-name new-chain-name\n\n" +"Commands:\n" +"--append -A chain : append to chain\n" +"--delete -D chain : delete matching rule from chain\n" +"--delete -D chain rulenum : delete rule at position rulenum from chain\n" +"--change-counters -C chain\n" +" [rulenum] pcnt bcnt : change counters of existing rule\n" +"--insert -I chain rulenum : insert rule at position rulenum in chain\n" +"--list -L [chain] : list the rules in a chain or in all chains\n" +"--flush -F [chain] : delete all rules in chain or in all chains\n" +"--init-table : replace the kernel table with the initial table\n" +"--zero -Z [chain] : put counters on zero in chain or in all chains\n" +"--policy -P chain target : change policy on chain to target\n" +"--new-chain -N chain : create a user defined chain\n" +"--rename-chain -E old new : rename a chain\n" +"--delete-chain -X [chain] : delete a user defined chain\n" +"--atomic-commit : update the kernel w/t table contained in <FILE>\n" +"--atomic-init : put the initial kernel table into <FILE>\n" +"--atomic-save : put the current kernel table into <FILE>\n" +"--atomic-file file : set <FILE> to file\n\n" +"Options:\n" +"--proto -p [!] proto : protocol hexadecimal, by name or LENGTH\n" +"--src -s [!] address[/mask]: source mac address\n" +"--dst -d [!] address[/mask]: destination mac address\n" +"--in-if -i [!] name[+] : network input interface name\n" +"--out-if -o [!] name[+] : network output interface name\n" +"--logical-in [!] name[+] : logical bridge input interface name\n" +"--logical-out [!] name[+] : logical bridge output interface name\n" +"--set-counters -c chain\n" +" pcnt bcnt : set the counters of the to be added rule\n" +"--modprobe -M program : try to insert modules using this program\n" +"--concurrent : use a file lock to support concurrent scripts\n" +"--version -V : print package version\n\n" +"Environment variable:\n" +/*ATOMIC_ENV_VARIABLE " : if set <FILE> (see above) will equal its value"*/ +"\n\n"); + for (; m != NULL; m = m->next) { + printf("\n"); + m->match->help(); + } + if (t != NULL) { + printf("\n"); + t->help(); + } + +// if (table->help) +// table->help(ebt_hooknames); +} + +/* Execute command L */ +static int list_rules(struct nft_handle *h, const char *chain, const char *table, + int rule_nr, int verbose, int numeric, int expanded, + int linenumbers, int counters) +{ + unsigned int format; + + format = FMT_OPTIONS; + if (verbose) + format |= FMT_VIA; + + if (numeric) + format |= FMT_NUMERIC; + + if (!expanded) + format |= FMT_KILOMEGAGIGA; + + if (linenumbers) + format |= FMT_LINENUMBERS; + + if (!counters) + format |= FMT_NOCOUNTS; + + return nft_rule_list(h, chain, table, rule_nr, format); +} + +static int parse_rule_range(const char *argv, int *rule_nr, int *rule_nr_end) +{ + char *colon = strchr(argv, ':'), *buffer; + + if (colon) { + *colon = '\0'; + if (*(colon + 1) == '\0') + *rule_nr_end = -1; /* Until the last rule */ + else { + *rule_nr_end = strtol(colon + 1, &buffer, 10); + if (*buffer != '\0' || *rule_nr_end == 0) + return -1; + } + } + if (colon == argv) + *rule_nr = 1; /* Beginning with the first rule */ + else { + *rule_nr = strtol(argv, &buffer, 10); + if (*buffer != '\0' || *rule_nr == 0) + return -1; + } + if (!colon) + *rule_nr_end = *rule_nr; + return 0; +} + +/* Incrementing or decrementing rules in daemon mode is not supported as the + * involved code overload is not worth it (too annoying to take the increased + * counters in the kernel into account). */ +static int parse_change_counters_rule(int argc, char **argv, int *rule_nr, int *rule_nr_end, int exec_style, struct ebtables_command_state *cs) +{ + char *buffer; + int ret = 0; + + if (optind + 1 >= argc || (argv[optind][0] == '-' && (argv[optind][1] < '0' || argv[optind][1] > '9')) || + (argv[optind + 1][0] == '-' && (argv[optind + 1][1] < '0' && argv[optind + 1][1] > '9'))) + xtables_error(PARAMETER_PROBLEM, + "The command -C needs at least 2 arguments"); + if (optind + 2 < argc && (argv[optind + 2][0] != '-' || (argv[optind + 2][1] >= '0' && argv[optind + 2][1] <= '9'))) { + if (optind + 3 != argc) + xtables_error(PARAMETER_PROBLEM, + "No extra options allowed with -C start_nr[:end_nr] pcnt bcnt"); + if (parse_rule_range(argv[optind], rule_nr, rule_nr_end)) + xtables_error(PARAMETER_PROBLEM, + "Something is wrong with the rule number specification '%s'", argv[optind]); + optind++; + } + + if (argv[optind][0] == '+') { + if (exec_style == EXEC_STYLE_DAEMON) +daemon_incr: + xtables_error(PARAMETER_PROBLEM, + "Incrementing rule counters (%s) not allowed in daemon mode", argv[optind]); + ret += 1; + cs->counters.pcnt = strtoull(argv[optind] + 1, &buffer, 10); + } else if (argv[optind][0] == '-') { + if (exec_style == EXEC_STYLE_DAEMON) +daemon_decr: + xtables_error(PARAMETER_PROBLEM, + "Decrementing rule counters (%s) not allowed in daemon mode", argv[optind]); + ret += 2; + cs->counters.pcnt = strtoull(argv[optind] + 1, &buffer, 10); + } else + cs->counters.pcnt = strtoull(argv[optind], &buffer, 10); + + if (*buffer != '\0') + goto invalid; + optind++; + if (argv[optind][0] == '+') { + if (exec_style == EXEC_STYLE_DAEMON) + goto daemon_incr; + ret += 3; + cs->counters.bcnt = strtoull(argv[optind] + 1, &buffer, 10); + } else if (argv[optind][0] == '-') { + if (exec_style == EXEC_STYLE_DAEMON) + goto daemon_decr; + ret += 6; + cs->counters.bcnt = strtoull(argv[optind] + 1, &buffer, 10); + } else + cs->counters.bcnt = strtoull(argv[optind], &buffer, 10); + + if (*buffer != '\0') + goto invalid; + optind++; + return ret; +invalid: + xtables_error(PARAMETER_PROBLEM,"Packet counter '%s' invalid", argv[optind]); +} + +static int parse_iface(char *iface, char *option) +{ + char *c; + + if ((c = strchr(iface, '+'))) { + if (*(c + 1) != '\0') { + xtables_error(PARAMETER_PROBLEM, + "Spurious characters after '+' wildcard for '%s'", option); + return -1; + } else + *c = IF_WILDCARD; + } + return 0; +} + +/* This code is very similar to iptables/xtables.c:command_match() */ +static void ebt_load_match(const char *name) +{ + struct xtables_match *m; + size_t size; + + m = xtables_find_match(name, XTF_LOAD_MUST_SUCCEED, NULL); + if (m == NULL) + xtables_error(OTHER_PROBLEM, "Unable to load %s match", name); + + size = XT_ALIGN(sizeof(struct xt_entry_match)) + m->size; + m->m = xtables_calloc(1, size); + m->m->u.match_size = size; + strcpy(m->m->u.user.name, m->name); + m->m->u.user.revision = m->revision; + xs_init_match(m); + + opts = merge_options(opts, m->extra_opts, &m->option_offset); + if (opts == NULL) + xtables_error(OTHER_PROBLEM, "Can't alloc memory"); +} + +static void ebt_load_watcher(const char *name) +{ + struct xtables_target *watcher; + size_t size; + + watcher = xtables_find_target(name, XTF_LOAD_MUST_SUCCEED); + if (!watcher) + xtables_error(OTHER_PROBLEM, + "Unable to load %s watcher", name); + + size = XT_ALIGN(sizeof(struct xt_entry_target)) + watcher->size; + + watcher->t = xtables_calloc(1, size); + watcher->t->u.target_size = size; + strncpy(watcher->t->u.user.name, name, + sizeof(watcher->t->u.user.name)); + watcher->t->u.user.name[sizeof(watcher->t->u.user.name)-1] = '\0'; + watcher->t->u.user.revision = watcher->revision; + + xs_init_target(watcher); + + opts = merge_options(opts, watcher->extra_opts, + &watcher->option_offset); + if (opts == NULL) + xtables_error(OTHER_PROBLEM, "Can't alloc memory"); +} + +static void ebt_load_match_extensions(void) +{ + opts = ebt_original_options; + ebt_load_match("802_3"); + ebt_load_match("ip"); + ebt_load_match("mark_m"); + + ebt_load_watcher("log"); +} + +static void ebt_add_match(struct xtables_match *m, + struct ebtables_command_state *cs) +{ + struct xtables_rule_match *i, **rule_matches = &cs->matches; + struct xtables_match *newm; + struct ebt_match *newnode; + + /* match already in rule_matches, skip inclusion */ + for (i = *rule_matches; i; i = i->next) { + if (strcmp(m->name, i->match->name) == 0) { + i->match->mflags |= m->mflags; + return; + } + } + + newm = xtables_find_match(m->name, XTF_LOAD_MUST_SUCCEED, rule_matches); + if (newm == NULL) + xtables_error(OTHER_PROBLEM, + "Unable to add match %s", m->name); + + newm->mflags = m->mflags; + + /* glue code for watchers */ + newnode = calloc(1, sizeof(struct ebt_match)); + if (newnode == NULL) + xtables_error(OTHER_PROBLEM, "Unable to alloc memory"); + + newnode->ismatch = true; + newnode->u.match = newm; + + if (cs->match_list == NULL) + cs->match_list = newnode; + else + cs->match_list->next = newnode; +} + +static void ebt_add_watcher(struct xtables_target *watcher, + struct ebtables_command_state *cs) +{ + struct ebt_match *i, *newnode; + + for (i = cs->match_list; i; i = i->next) { + if (i->ismatch) + continue; + if (strcmp(i->u.watcher->name, watcher->name) == 0) { + i->u.watcher->tflags |= watcher->tflags; + return; + } + } + + newnode = calloc(1, sizeof(struct ebt_match)); + if (newnode == NULL) + xtables_error(OTHER_PROBLEM, "Unable to alloc memory"); + + newnode->u.watcher = watcher; + + if (cs->match_list == NULL) + cs->match_list = newnode; + else + cs->match_list->next = newnode; +} + +/* We use exec_style instead of #ifdef's because ebtables.so is a shared object. */ +int do_commandeb(struct nft_handle *h, int argc, char *argv[], char **table) +{ + char *buffer; + int c, i; + int zerochain = -1; /* Needed for the -Z option (we can have -Z <this> -L <that>) */ + int chcounter = 0; /* Needed for -C */ + int rule_nr = 0; + int rule_nr_end = 0; + int ret = 0; + unsigned int flags = 0; + struct xtables_target *t, *w; + struct xtables_match *m; + struct ebtables_command_state cs; + char command = 'h'; + const char *chain = NULL; + const char *policy = NULL; + int exec_style = EXEC_STYLE_PRG; + int selected_chain = -1; + struct xtables_rule_match *xtrm_i; + struct ebt_match *match; + + memset(&cs, 0, sizeof(cs)); + cs.argv = argv; + + if (nft_init(h, xtables_bridge) < 0) + xtables_error(OTHER_PROBLEM, + "Could not initialize nftables layer."); + + h->ops = nft_family_ops_lookup(h->family); + if (h->ops == NULL) + xtables_error(PARAMETER_PROBLEM, "Unknown family"); + + /* manually registering ebt matches, given the original ebtables parser + * don't use '-m matchname' and the match can't loaded dinamically when + * the user calls it. + */ + ebt_load_match_extensions(); + + /* clear mflags in case do_commandeb gets called a second time + * (we clear the global list of all matches for security)*/ + for (m = xtables_matches; m; m = m->next) + m->mflags = 0; + + for (t = xtables_targets; t; t = t->next) { + t->tflags = 0; + t->used = 0; + } + + /* prevent getopt to spoil our error reporting */ + opterr = false; + + /* Getopt saves the day */ + while ((c = getopt_long(argc, argv, + "-A:D:C:I:N:E:X::L::Z::F::P:Vhi:o:j:c:p:s:d:t:M:", opts, NULL)) != -1) { + cs.c = c; + cs.invert = ebt_invert; + switch (c) { + + case 'A': /* Add a rule */ + case 'D': /* Delete a rule */ + case 'C': /* Change counters */ + case 'P': /* Define policy */ + case 'I': /* Insert a rule */ + case 'N': /* Make a user defined chain */ + case 'E': /* Rename chain */ + case 'X': /* Delete chain */ + /* We allow -N chainname -P policy */ + /* XXX: Not in ebtables-compat */ + if (command == 'N' && c == 'P') { + command = c; + optind--; /* No table specified */ + goto handle_P; + } + if (OPT_COMMANDS) + xtables_error(PARAMETER_PROBLEM, + "Multiple commands are not allowed"); + + command = c; + chain = optarg; + selected_chain = get_current_chain(chain); + flags |= OPT_COMMAND; + /*if (!(replace->flags & OPT_KERNELDATA)) + ebt_get_kernel_table(replace, 0);*/ + /*if (optarg && (optarg[0] == '-' || !strcmp(optarg, "!"))) + ebt_print_error2("No chain name specified");*/ + if (c == 'N') { + ret = nft_chain_user_add(h, chain, *table); + break; + } else if (c == 'X') { + ret = nft_chain_user_del(h, chain, *table); + break; + } + + if (c == 'E') { + if (optind >= argc) + xtables_error(PARAMETER_PROBLEM, "No new chain name specified"); + else if (optind < argc - 1) + xtables_error(PARAMETER_PROBLEM, "No extra options allowed with -E"); + else if (strlen(argv[optind]) >= NFT_CHAIN_MAXNAMELEN) + xtables_error(PARAMETER_PROBLEM, "Chain name length can't exceed %d"" characters", NFT_CHAIN_MAXNAMELEN - 1); + else if (strchr(argv[optind], ' ') != NULL) + xtables_error(PARAMETER_PROBLEM, "Use of ' ' not allowed in chain names"); + + ret = nft_chain_user_rename(h, chain, *table, + argv[optind]); + if (ret != 0 && errno == ENOENT) + xtables_error(PARAMETER_PROBLEM, "Chain '%s' doesn't exists", chain); + + optind++; + break; + } else if (c == 'D' && optind < argc && (argv[optind][0] != '-' || (argv[optind][1] >= '0' && argv[optind][1] <= '9'))) { + if (optind != argc - 1) + xtables_error(PARAMETER_PROBLEM, + "No extra options allowed with -D start_nr[:end_nr]"); + if (parse_rule_range(argv[optind], &rule_nr, &rule_nr_end)) + xtables_error(PARAMETER_PROBLEM, + "Problem with the specified rule number(s) '%s'", argv[optind]); + optind++; + } else if (c == 'C') { + if ((chcounter = parse_change_counters_rule(argc, argv, &rule_nr, &rule_nr_end, exec_style, &cs)) == -1) + return -1; + } else if (c == 'I') { + if (optind >= argc || (argv[optind][0] == '-' && (argv[optind][1] < '0' || argv[optind][1] > '9'))) + rule_nr = 1; + else { + rule_nr = parse_rule_number(argv[optind]); + optind++; + } + } else if (c == 'P') { +handle_P: + if (optind >= argc) + xtables_error(PARAMETER_PROBLEM, + "No policy specified"); + for (i = 0; i < NUM_STANDARD_TARGETS; i++) + if (!strcmp(argv[optind], nft_ebt_standard_target(i))) { + policy = argv[optind]; + if (-i-1 == EBT_CONTINUE) + xtables_error(PARAMETER_PROBLEM, + "Wrong policy '%s'", + argv[optind]); + break; + } + if (i == NUM_STANDARD_TARGETS) + xtables_error(PARAMETER_PROBLEM, + "Unknown policy '%s'", argv[optind]); + optind++; + } + break; + case 'L': /* List */ + case 'F': /* Flush */ + case 'Z': /* Zero counters */ + if (c == 'Z') { + if ((flags & OPT_ZERO) || (flags & OPT_COMMAND && command != 'L')) +print_zero: + xtables_error(PARAMETER_PROBLEM, + "Command -Z only allowed together with command -L"); + flags |= OPT_ZERO; + } else { + if (flags & OPT_COMMAND) + xtables_error(PARAMETER_PROBLEM, + "Multiple commands are not allowed"); + command = c; + flags |= OPT_COMMAND; + if (flags & OPT_ZERO && c != 'L') + goto print_zero; + } + +#ifdef SILENT_DAEMON + if (c== 'L' && exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "-L not supported in daemon mode"); +#endif + + /*if (!(replace->flags & OPT_KERNELDATA)) + ebt_get_kernel_table(replace, 0); + i = -1; + if (optind < argc && argv[optind][0] != '-') { + if ((i = ebt_get_chainnr(replace, argv[optind])) == -1) + ebt_print_error2("Chain '%s' doesn't exist", argv[optind]); + optind++; + } + if (i != -1) { + if (c == 'Z') + zerochain = i; + else + replace->selected_chain = i; + }*/ + break; + case 'V': /* Version */ + if (OPT_COMMANDS) + xtables_error(PARAMETER_PROBLEM, + "Multiple commands are not allowed"); + command = 'V'; + if (exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "%s %s\n", prog_name, prog_vers); + printf("%s %s\n", prog_name, prog_vers); + exit(0); + case 'h': /* Help */ +#ifdef SILENT_DAEMON + if (exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "-h not supported in daemon mode"); +#endif + if (OPT_COMMANDS) + xtables_error(PARAMETER_PROBLEM, + "Multiple commands are not allowed"); + command = 'h'; + + /* All other arguments should be extension names */ + while (optind < argc) { + /*struct ebt_u_match *m; + struct ebt_u_watcher *w;*/ + + if (!strcasecmp("list_extensions", argv[optind])) { + ebt_list_extensions(xtables_targets, cs.matches); + exit(0); + } + /*if ((m = ebt_find_match(argv[optind]))) + ebt_add_match(new_entry, m); + else if ((w = ebt_find_watcher(argv[optind]))) + ebt_add_watcher(new_entry, w); + else {*/ + if (!(t = xtables_find_target(argv[optind], XTF_TRY_LOAD))) + xtables_error(PARAMETER_PROBLEM,"Extension '%s' not found", argv[optind]); + if (flags & OPT_JUMP) + xtables_error(PARAMETER_PROBLEM,"Sorry, you can only see help for one target extension at a time"); + flags |= OPT_JUMP; + cs.target = t; + //} + optind++; + } + break; + case 't': /* Table */ + if (OPT_COMMANDS) + xtables_error(PARAMETER_PROBLEM, + "Please put the -t option first"); + ebt_check_option2(&flags, OPT_TABLE); + if (strlen(optarg) > EBT_TABLE_MAXNAMELEN - 1) + xtables_error(PARAMETER_PROBLEM, + "Table name length cannot exceed %d characters", + EBT_TABLE_MAXNAMELEN - 1); + *table = optarg; + break; + case 'i': /* Input interface */ + case 2 : /* Logical input interface */ + case 'o': /* Output interface */ + case 3 : /* Logical output interface */ + case 'j': /* Target */ + case 'p': /* Net family protocol */ + case 's': /* Source mac */ + case 'd': /* Destination mac */ + case 'c': /* Set counters */ + if (!OPT_COMMANDS) + xtables_error(PARAMETER_PROBLEM, + "No command specified"); + if (command != 'A' && command != 'D' && command != 'I' && command != 'C') + xtables_error(PARAMETER_PROBLEM, + "Command and option do not match"); + if (c == 'i') { + ebt_check_option2(&flags, OPT_IN); + if (selected_chain > 2 && selected_chain < NF_BR_BROUTING) + xtables_error(PARAMETER_PROBLEM, + "Use -i only in INPUT, FORWARD, PREROUTING and BROUTING chains"); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_IIN; + + if (strlen(optarg) >= IFNAMSIZ) +big_iface_length: + xtables_error(PARAMETER_PROBLEM, + "Interface name length cannot exceed %d characters", + IFNAMSIZ - 1); + xtables_parse_interface(optarg, cs.fw.in, cs.fw.in_mask); + break; + } else if (c == 2) { + ebt_check_option2(&flags, OPT_LOGICALIN); + if (selected_chain > 2 && selected_chain < NF_BR_BROUTING) + xtables_error(PARAMETER_PROBLEM, + "Use --logical-in only in INPUT, FORWARD, PREROUTING and BROUTING chains"); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_ILOGICALIN; + + if (strlen(optarg) >= IFNAMSIZ) + goto big_iface_length; + strcpy(cs.fw.logical_in, optarg); + if (parse_iface(cs.fw.logical_in, "--logical-in")) + return -1; + break; + } else if (c == 'o') { + ebt_check_option2(&flags, OPT_OUT); + if (selected_chain < 2 || selected_chain == NF_BR_BROUTING) + xtables_error(PARAMETER_PROBLEM, + "Use -o only in OUTPUT, FORWARD and POSTROUTING chains"); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_IOUT; + + if (strlen(optarg) >= IFNAMSIZ) + goto big_iface_length; + + xtables_parse_interface(optarg, cs.fw.out, cs.fw.out_mask); + break; + } else if (c == 3) { + ebt_check_option2(&flags, OPT_LOGICALOUT); + if (selected_chain < 2 || selected_chain == NF_BR_BROUTING) + xtables_error(PARAMETER_PROBLEM, + "Use --logical-out only in OUTPUT, FORWARD and POSTROUTING chains"); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_ILOGICALOUT; + + if (strlen(optarg) >= IFNAMSIZ) + goto big_iface_length; + strcpy(cs.fw.logical_out, optarg); + if (parse_iface(cs.fw.logical_out, "--logical-out")) + return -1; + break; + } else if (c == 'j') { + ebt_check_option2(&flags, OPT_JUMP); + cs.jumpto = parse_target(optarg); + cs.target = command_jump(&cs, cs.jumpto); + break; + } else if (c == 's') { + ebt_check_option2(&flags, OPT_SOURCE); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_ISOURCE; + + if (ebt_get_mac_and_mask(optarg, cs.fw.sourcemac, cs.fw.sourcemsk)) + xtables_error(PARAMETER_PROBLEM, "Problem with specified source mac '%s'", optarg); + cs.fw.bitmask |= EBT_SOURCEMAC; + break; + } else if (c == 'd') { + ebt_check_option2(&flags, OPT_DEST); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_IDEST; + + if (ebt_get_mac_and_mask(optarg, cs.fw.destmac, cs.fw.destmsk)) + xtables_error(PARAMETER_PROBLEM, "Problem with specified destination mac '%s'", optarg); + cs.fw.bitmask |= EBT_DESTMAC; + break; + } else if (c == 'c') { + ebt_check_option2(&flags, OPT_COUNT); + if (ebt_check_inverse2(optarg, argc, argv)) + xtables_error(PARAMETER_PROBLEM, + "Unexpected '!' after -c"); + if (optind >= argc || optarg[0] == '-' || argv[optind][0] == '-') + xtables_error(PARAMETER_PROBLEM, + "Option -c needs 2 arguments"); + + cs.counters.pcnt = strtoull(optarg, &buffer, 10); + if (*buffer != '\0') + xtables_error(PARAMETER_PROBLEM, + "Packet counter '%s' invalid", + optarg); + cs.counters.bcnt = strtoull(argv[optind], &buffer, 10); + if (*buffer != '\0') + xtables_error(PARAMETER_PROBLEM, + "Packet counter '%s' invalid", + argv[optind]); + optind++; + break; + } + ebt_check_option2(&flags, OPT_PROTOCOL); + if (ebt_check_inverse2(optarg, argc, argv)) + cs.fw.invflags |= EBT_IPROTO; + + cs.fw.bitmask &= ~((unsigned int)EBT_NOPROTO); + i = strtol(optarg, &buffer, 16); + if (*buffer == '\0' && (i < 0 || i > 0xFFFF)) + xtables_error(PARAMETER_PROBLEM, + "Problem with the specified protocol"); + if (*buffer != '\0') { + struct ethertypeent *ent; + + if (!strcasecmp(optarg, "LENGTH")) { + cs.fw.bitmask |= EBT_802_3; + break; + } + ent = getethertypebyname(optarg); + if (!ent) + xtables_error(PARAMETER_PROBLEM, + "Problem with the specified Ethernet protocol '%s', perhaps "_PATH_ETHERTYPES " is missing", optarg); + cs.fw.ethproto = ent->e_ethertype; + } else + cs.fw.ethproto = i; + + if (cs.fw.ethproto < 0x0600) + xtables_error(PARAMETER_PROBLEM, + "Sorry, protocols have values above or equal to 0x0600"); + break; + case 4 : /* Lc */ +#ifdef SILENT_DAEMON + if (exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "--Lc is not supported in daemon mode"); +#endif + ebt_check_option2(&flags, LIST_C); + if (command != 'L') + xtables_error(PARAMETER_PROBLEM, + "Use --Lc with -L"); + flags |= LIST_C; + break; + case 5 : /* Ln */ +#ifdef SILENT_DAEMON + if (exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "--Ln is not supported in daemon mode"); +#endif + ebt_check_option2(&flags, LIST_N); + if (command != 'L') + xtables_error(PARAMETER_PROBLEM, + "Use --Ln with -L"); + if (flags & LIST_X) + xtables_error(PARAMETER_PROBLEM, + "--Lx is not compatible with --Ln"); + flags |= LIST_N; + break; + case 6 : /* Lx */ +#ifdef SILENT_DAEMON + if (exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "--Lx is not supported in daemon mode"); +#endif + ebt_check_option2(&flags, LIST_X); + if (command != 'L') + xtables_error(PARAMETER_PROBLEM, + "Use --Lx with -L"); + if (flags & LIST_N) + xtables_error(PARAMETER_PROBLEM, + "--Lx is not compatible with --Ln"); + flags |= LIST_X; + break; + case 12 : /* Lmac2 */ +#ifdef SILENT_DAEMON + if (exec_style == EXEC_STYLE_DAEMON) + xtables_error(PARAMETER_PROBLEM, + "--Lmac2 is not supported in daemon mode"); +#endif + ebt_check_option2(&flags, LIST_MAC2); + if (command != 'L') + xtables_error(PARAMETER_PROBLEM, + "Use --Lmac2 with -L"); + flags |= LIST_MAC2; + break; + case 8 : /* atomic-commit */ +/* if (exec_style == EXEC_STYLE_DAEMON) + ebt_print_error2("--atomic-commit is not supported in daemon mode"); + replace->command = c; + if (OPT_COMMANDS) + ebt_print_error2("Multiple commands are not allowed"); + replace->flags |= OPT_COMMAND; + if (!replace->filename) + ebt_print_error2("No atomic file specified");*/ + /* Get the information from the file */ + /*ebt_get_table(replace, 0);*/ + /* We don't want the kernel giving us its counters, + * they would overwrite the counters extracted from + * the file */ + /*replace->num_counters = 0;*/ + /* Make sure the table will be written to the kernel */ + /*free(replace->filename); + replace->filename = NULL; + break;*/ + /*case 7 :*/ /* atomic-init */ + /*case 10:*/ /* atomic-save */ + /*case 11:*/ /* init-table */ + /* if (exec_style == EXEC_STYLE_DAEMON) { + if (c == 7) { + ebt_print_error2("--atomic-init is not supported in daemon mode"); + } else if (c == 10) + ebt_print_error2("--atomic-save is not supported in daemon mode"); + ebt_print_error2("--init-table is not supported in daemon mode"); + } + replace->command = c; + if (OPT_COMMANDS) + ebt_print_error2("Multiple commands are not allowed"); + if (c != 11 && !replace->filename) + ebt_print_error2("No atomic file specified"); + replace->flags |= OPT_COMMAND; + { + char *tmp = replace->filename;*/ + + /* Get the kernel table */ + /*replace->filename = NULL; + ebt_get_kernel_table(replace, c == 10 ? 0 : 1); + replace->filename = tmp; + } + break; + case 9 :*/ /* atomic */ + /*if (exec_style == EXEC_STYLE_DAEMON) + ebt_print_error2("--atomic is not supported in daemon mode"); + if (OPT_COMMANDS) + ebt_print_error2("--atomic has to come before the command");*/ + /* A possible memory leak here, but this is not + * executed in daemon mode */ + /*replace->filename = (char *)malloc(strlen(optarg) + 1); + strcpy(replace->filename, optarg); + break; + case 13 : *//* concurrent */ + /*signal(SIGINT, sighandler); + signal(SIGTERM, sighandler); + use_lockfd = 1; + break;*/ + case 1 : + if (!strcmp(optarg, "!")) + ebt_check_inverse2(optarg, argc, argv); + else + xtables_error(PARAMETER_PROBLEM, + "Bad argument : '%s'", optarg); + /* ebt_ebt_check_inverse2() did optind++ */ + optind--; + continue; + default: + /* Is it a target option? */ + if (cs.target != NULL && cs.target->parse != NULL) { + int opt_offset = cs.target->option_offset; + if (cs.target->parse(c - opt_offset, + argv, ebt_invert, + &cs.target->tflags, + NULL, &cs.target->t)) + goto check_extension; + } + + /* Is it a match_option? */ + for (m = xtables_matches; m; m = m->next) { + if (m->parse(c - m->option_offset, argv, ebt_invert, &m->mflags, NULL, &m->m)) { + ebt_add_match(m, &cs); + goto check_extension; + } + } + + /* Is it a watcher option? */ + for (w = xtables_targets; w; w = w->next) { + if (w->parse(c - w->option_offset, argv, + ebt_invert, &w->tflags, + NULL, &w->t)) { + ebt_add_watcher(w, &cs); + goto check_extension; + } + } + /* + if (w == NULL && c == '?') + ebt_print_error2("Unknown argument: '%s'", argv[optind - 1], (char)optopt, (char)c); + else if (w == NULL) { + if (!strcmp(t->name, "standard")) + ebt_print_error2("Unknown argument: don't forget the -t option"); + else + ebt_print_error2("Target-specific option does not correspond with specified target"); + } + if (ebt_errormsg[0] != '\0') + return -1; + if (w->used == 0) { + ebt_add_watcher(new_entry, w); + w->used = 1; + }*/ +check_extension: + if (command != 'A' && command != 'I' && + command != 'D' && command != 'C') + xtables_error(PARAMETER_PROBLEM, + "Extensions only for -A, -I, -D and -C"); + } + ebt_invert = 0; + } + + /* Just in case we didn't catch an error */ + /*if (ebt_errormsg[0] != '\0') + return -1; + + if (!(table = ebt_find_table(replace->name))) + ebt_print_error2("Bad table name");*/ + + if (command == 'h' && !(flags & OPT_ZERO)) { + print_help(cs.target, cs.matches, *table); + if (exec_style == EXEC_STYLE_PRG) + exit(0); + } + + /* Do the final checks */ + if (command == 'A' || command == 'I' || + command == 'D' || command == 'C') { + for (xtrm_i = cs.matches; xtrm_i; xtrm_i = xtrm_i->next) + xtables_option_mfcall(xtrm_i->match); + + for (match = cs.match_list; match; match = match->next) { + if (match->ismatch) + continue; + + xtables_option_tfcall(match->u.watcher); + } + + if (cs.target != NULL) + xtables_option_tfcall(cs.target); + } + /* So, the extensions can work with the host endian. + * The kernel does not have to do this of course */ + cs.fw.ethproto = htons(cs.fw.ethproto); + + if (command == 'P') { + if (selected_chain < 0) { + xtables_error(PARAMETER_PROBLEM, + "Policy %s not allowed for user defined chains", + policy); + } + if (strcmp(policy, "RETURN") == 0) { + xtables_error(PARAMETER_PROBLEM, + "Policy RETURN only allowed for user defined chains"); + } + ret = nft_chain_set(h, *table, chain, policy, NULL); + if (ret < 0) + xtables_error(PARAMETER_PROBLEM, "Wrong policy"); + } else if (command == 'L') { + ret = list_rules(h, chain, *table, rule_nr, + flags&OPT_VERBOSE, + flags&OPT_NUMERIC, + /*flags&OPT_EXPANDED*/0, + flags&LIST_N, + flags&LIST_C); + if (!(flags & OPT_ZERO) && exec_style == EXEC_STYLE_PRG) + exit(0); + } + if (flags & OPT_ZERO) { + selected_chain = zerochain; + ret = nft_chain_zero_counters(h, chain, *table); + } else if (command == 'F') { + ret = nft_rule_flush(h, chain, *table); + } else if (command == 'A') { + ret = append_entry(h, chain, *table, &cs, 0, + flags&OPT_VERBOSE, true); + } else if (command == 'I') { + ret = append_entry(h, chain, *table, &cs, rule_nr - 1, + flags&OPT_VERBOSE, false); + } else if (command == 'D') { + ret = delete_entry(h, chain, *table, &cs, rule_nr - 1, + rule_nr_end, flags&OPT_VERBOSE); + } /*else if (replace->command == 'C') { + ebt_change_counters(replace, new_entry, rule_nr, rule_nr_end, &(new_entry->cnt_surplus), chcounter); + if (ebt_errormsg[0] != '\0') + return -1; + }*/ + /* Commands -N, -E, -X, --atomic-commit, --atomic-commit, --atomic-save, + * --init-table fall through */ + + /*if (ebt_errormsg[0] != '\0') + return -1; + if (table->check) + table->check(replace); + + if (exec_style == EXEC_STYLE_PRG) {*//* Implies ebt_errormsg[0] == '\0' */ + /*ebt_deliver_table(replace); + + if (replace->nentries) + ebt_deliver_counters(replace);*/ + + ebt_cs_clean(&cs); + return ret; +} diff --git a/iptables/xtables-multi.c b/iptables/xtables-multi.c index 5f487355..30391e7f 100644 --- a/iptables/xtables-multi.c +++ b/iptables/xtables-multi.c @@ -43,6 +43,7 @@ static const struct subcommand multi_subcommands[] = { {"xtables-config", xtables_config_main}, {"xtables-events", xtables_events_main}, {"xtables-arp", xtables_arp_main}, + {"xtables-ebtables", xtables_eb_main}, #endif {NULL}, }; diff --git a/iptables/xtables-multi.h b/iptables/xtables-multi.h index e706894b..21e60b2b 100644 --- a/iptables/xtables-multi.h +++ b/iptables/xtables-multi.h @@ -10,6 +10,7 @@ extern int xtables_ip6_main(int, char **); extern int xtables_ip6_save_main(int, char **); extern int xtables_ip6_restore_main(int, char **); extern int xtables_arp_main(int, char **); +extern int xtables_eb_main(int, char **); extern int xtables_config_main(int, char **); extern int xtables_events_main(int, char **); #endif diff --git a/libxtables/xtables.c b/libxtables/xtables.c index 68411248..16e4d969 100644 --- a/libxtables/xtables.c +++ b/libxtables/xtables.c @@ -168,6 +168,16 @@ static const struct xtables_afinfo afinfo_ipv6 = { .so_rev_target = IP6T_SO_GET_REVISION_TARGET, }; +static const struct xtables_afinfo afinfo_bridge = { + .kmod = "eb_tables", + .proc_exists = "/proc/net/eb_tables_names", + .libprefix = "libebt_", + .family = NFPROTO_BRIDGE, + .ipproto = IPPROTO_IP, + .so_rev_match = -1, + .so_rev_target = -1, +}; + const struct xtables_afinfo *afinfo; /* Search path for Xtables .so files */ @@ -224,6 +234,9 @@ void xtables_set_nfproto(uint8_t nfproto) case NFPROTO_IPV6: afinfo = &afinfo_ipv6; break; + case NFPROTO_BRIDGE: + afinfo = &afinfo_bridge; + break; default: fprintf(stderr, "libxtables: unhandled NFPROTO in %s\n", __func__); @@ -536,7 +549,7 @@ void xtables_parse_interface(const char *arg, char *vianame, static void *load_extension(const char *search_path, const char *af_prefix, const char *name, bool is_target) { - const char *all_prefixes[] = {"libxt_", af_prefix, NULL}; + const char *all_prefixes[] = {af_prefix, "libxt_", NULL}; const char **prefix; const char *dir = search_path, *next; void *ptr = NULL; |