From f8d036e5c8653406d2b69d69bcd3ea85d5b9f328 Mon Sep 17 00:00:00 2001 From: "/C=EU/ST=EU/CN=Patrick McHardy/emailAddress=kaber@trash.net" Date: Tue, 29 Jan 2008 13:37:21 +0000 Subject: [IPTABLES]: libxt_conntrack revision 1 Add support for xt_conntrack match revision 1. Signed-off-by: Jan Engelhardt --- extensions/libxt_conntrack.c | 575 ++++++++++++++++++++++++++++++++++++++++- extensions/libxt_conntrack.man | 18 +- 2 files changed, 576 insertions(+), 17 deletions(-) (limited to 'extensions') diff --git a/extensions/libxt_conntrack.c b/extensions/libxt_conntrack.c index 9c7b01a..d076d49 100644 --- a/extensions/libxt_conntrack.c +++ b/extensions/libxt_conntrack.c @@ -1,10 +1,17 @@ -/* Shared library add-on to iptables for conntrack matching support. - * GPL (C) 2001 Marc Boucher (marc@mbsi.ca). +/* + * libxt_conntrack + * Shared library add-on to iptables for conntrack matching support. + * + * GPL (C) 2001 Marc Boucher (marc@mbsi.ca). + * Copyright © CC Computer Consultants GmbH, 2007 - 2008 + * Jan Engelhardt */ - +#include +#include #include #include #include +#include #include #include #include @@ -13,6 +20,7 @@ #include #include #include +#include /* Function which prints out usage message. */ static void conntrack_mt_help(void) @@ -27,14 +35,20 @@ static void conntrack_mt_help(void) "[!] --ctreplsrc address[/mask]\n" "[!] --ctrepldst address[/mask]\n" " Original/Reply source/destination address\n" +"[!] --ctorigsrcport port\n" +"[!] --ctorigdstport port\n" +"[!] --ctreplsrcport port\n" +"[!] --ctrepldstport port\n" +" TCP/UDP/SCTP orig./reply source/destination port\n" "[!] --ctstatus {NONE|EXPECTED|SEEN_REPLY|ASSURED|CONFIRMED}[,...]\n" " Status(es) to match\n" "[!] --ctexpire time[:time] Match remaining lifetime in seconds against\n" " value or range of values (inclusive)\n" +" --ctdir {ORIGINAL|REPLY} Flow direction of packet\n" "\n"); } -static const struct option conntrack_mt_opts[] = { +static const struct option conntrack_mt_opts_v0[] = { {.name = "ctstate", .has_arg = true, .val = '1'}, {.name = "ctproto", .has_arg = true, .val = '2'}, {.name = "ctorigsrc", .has_arg = true, .val = '3'}, @@ -46,6 +60,23 @@ static const struct option conntrack_mt_opts[] = { {}, }; +static const struct option conntrack_mt_opts[] = { + {.name = "ctstate", .has_arg = true, .val = '1'}, + {.name = "ctproto", .has_arg = true, .val = '2'}, + {.name = "ctorigsrc", .has_arg = true, .val = '3'}, + {.name = "ctorigdst", .has_arg = true, .val = '4'}, + {.name = "ctreplsrc", .has_arg = true, .val = '5'}, + {.name = "ctrepldst", .has_arg = true, .val = '6'}, + {.name = "ctstatus", .has_arg = true, .val = '7'}, + {.name = "ctexpire", .has_arg = true, .val = '8'}, + {.name = "ctorigsrcport", .has_arg = true, .val = 'a'}, + {.name = "ctorigdstport", .has_arg = true, .val = 'b'}, + {.name = "ctreplsrcport", .has_arg = true, .val = 'c'}, + {.name = "ctrepldstport", .has_arg = true, .val = 'd'}, + {.name = "ctdir", .has_arg = true, .val = 'e'}, + {}, +}; + static int parse_state(const char *state, size_t strlen, struct xt_conntrack_info *sinfo) { @@ -83,6 +114,45 @@ parse_states(const char *arg, struct xt_conntrack_info *sinfo) exit_error(PARAMETER_PROBLEM, "Bad ctstate `%s'", arg); } +static bool +conntrack_ps_state(struct xt_conntrack_mtinfo1 *info, const char *state, + size_t z) +{ + if (strncasecmp(state, "INVALID", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_INVALID; + else if (strncasecmp(state, "NEW", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_BIT(IP_CT_NEW); + else if (strncasecmp(state, "ESTABLISHED", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_BIT(IP_CT_ESTABLISHED); + else if (strncasecmp(state, "RELATED", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_BIT(IP_CT_RELATED); + else if (strncasecmp(state, "UNTRACKED", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_UNTRACKED; + else if (strncasecmp(state, "SNAT", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_SNAT; + else if (strncasecmp(state, "DNAT", z) == 0) + info->state_mask |= XT_CONNTRACK_STATE_DNAT; + else + return false; + return true; +} + +static void +conntrack_ps_states(struct xt_conntrack_mtinfo1 *info, const char *arg) +{ + const char *comma; + + while ((comma = strchr(arg, ',')) != NULL) { + if (comma == arg || !conntrack_ps_state(info, arg, comma - arg)) + exit_error(PARAMETER_PROBLEM, + "Bad ctstate \"%s\"", arg); + arg = comma + 1; + } + + if (strlen(arg) == 0 || !conntrack_ps_state(info, arg, strlen(arg))) + exit_error(PARAMETER_PROBLEM, "Bad ctstate \"%s\"", arg); +} + static int parse_status(const char *status, size_t strlen, struct xt_conntrack_info *sinfo) { @@ -96,7 +166,7 @@ parse_status(const char *status, size_t strlen, struct xt_conntrack_info *sinfo) sinfo->statusmask |= IPS_ASSURED; #ifdef IPS_CONFIRMED else if (strncasecmp(status, "CONFIRMED", strlen) == 0) - sinfo->stausmask |= IPS_CONFIRMED; + sinfo->statusmask |= IPS_CONFIRMED; #endif else return 0; @@ -118,6 +188,41 @@ parse_statuses(const char *arg, struct xt_conntrack_info *sinfo) exit_error(PARAMETER_PROBLEM, "Bad ctstatus `%s'", arg); } +static bool +conntrack_ps_status(struct xt_conntrack_mtinfo1 *info, const char *status, + size_t z) +{ + if (strncasecmp(status, "NONE", z) == 0) + info->status_mask |= 0; + else if (strncasecmp(status, "EXPECTED", z) == 0) + info->status_mask |= IPS_EXPECTED; + else if (strncasecmp(status, "SEEN_REPLY", z) == 0) + info->status_mask |= IPS_SEEN_REPLY; + else if (strncasecmp(status, "ASSURED", z) == 0) + info->status_mask |= IPS_ASSURED; + else if (strncasecmp(status, "CONFIRMED", z) == 0) + info->status_mask |= IPS_CONFIRMED; + else + return false; + return true; +} + +static void +conntrack_ps_statuses(struct xt_conntrack_mtinfo1 *info, const char *arg) +{ + const char *comma; + + while ((comma = strchr(arg, ',')) != NULL) { + if (comma == arg || !conntrack_ps_status(info, arg, comma - arg)) + exit_error(PARAMETER_PROBLEM, + "Bad ctstatus \"%s\"", arg); + arg = comma + 1; + } + + if (strlen(arg) == 0 || !conntrack_ps_status(info, arg, strlen(arg))) + exit_error(PARAMETER_PROBLEM, "Bad ctstatus \"%s\"", arg); +} + static unsigned long parse_expire(const char *s) { @@ -138,7 +243,8 @@ parse_expires(const char *s, struct xt_conntrack_info *sinfo) buffer = strdup(s); if ((cp = strchr(buffer, ':')) == NULL) - sinfo->expires_min = sinfo->expires_max = parse_expire(buffer); + sinfo->expires_min = sinfo->expires_max = + parse_expire(buffer); else { *cp = '\0'; cp++; @@ -154,6 +260,30 @@ parse_expires(const char *s, struct xt_conntrack_info *sinfo) "range value `%lu'", sinfo->expires_min, sinfo->expires_max); } +static void +conntrack_ps_expires(struct xt_conntrack_mtinfo1 *info, const char *s) +{ + unsigned int min, max; + char *end; + + if (!strtonum(s, &end, &min, 0, ~0)) + param_act(P_BAD_VALUE, "conntrack", "--expires", s); + max = min; + if (*end == ':') + if (!strtonum(s, &end, &max, 0, ~0U)) + param_act(P_BAD_VALUE, "conntrack", "--expires", s); + if (*end != '\0') + param_act(P_BAD_VALUE, "conntrack", "--expires", s); + + if (min > max) + exit_error(PARAMETER_PROBLEM, + "expire min. range value \"%u\" greater than max. " + "range value \"%u\"", min, max); + + info->expires_min = min; + info->expires_max = max; +} + /* Function which parses command options; returns true if it ate an option */ static int conntrack_parse(int c, char **argv, int invert, unsigned int *flags, @@ -305,10 +435,257 @@ static int conntrack_parse(int c, char **argv, int invert, unsigned int *flags, return 1; } +static int +conntrack_mt_parse(int c, char **argv, int invert, unsigned int *flags, + struct xt_entry_match **match) +{ + struct xt_conntrack_mtinfo1 *info = (void *)(*match)->data; + unsigned int port; + char *p; + + switch (c) { + case '1': /* --ctstate */ + conntrack_ps_states(info, optarg); + info->match_flags |= XT_CONNTRACK_STATE; + if (invert) + info->invert_flags |= XT_CONNTRACK_STATE; + break; + + case '2': /* --ctproto */ + /* Canonicalize into lower case */ + for (p = optarg; *p != '\0'; ++p) + *p = tolower(*p); + info->l4proto = parse_protocol(optarg); + + if (info->l4proto == 0 && (info->invert_flags & XT_INV_PROTO)) + exit_error(PARAMETER_PROBLEM, "conntrack: rule would " + "never match protocol"); + + info->match_flags |= XT_CONNTRACK_PROTO; + if (invert) + info->invert_flags |= XT_CONNTRACK_PROTO; + break; + + case '7': /* --ctstatus */ + conntrack_ps_statuses(info, optarg); + info->match_flags |= XT_CONNTRACK_STATUS; + if (invert) + info->invert_flags |= XT_CONNTRACK_STATUS; + break; + + case '8': /* --ctexpire */ + conntrack_ps_expires(info, optarg); + info->match_flags |= XT_CONNTRACK_EXPIRES; + if (invert) + info->invert_flags |= XT_CONNTRACK_EXPIRES; + break; + + case 'a': /* --ctorigsrcport */ + if (!strtonum(optarg, NULL, &port, 0, ~(u_int16_t)0)) + param_act(P_BAD_VALUE, "conntrack", + "--ctorigsrcport", optarg); + info->match_flags |= XT_CONNTRACK_ORIGSRC_PORT; + info->origsrc_port = htons(port); + if (invert) + info->invert_flags |= XT_CONNTRACK_ORIGSRC_PORT; + break; + + case 'b': /* --ctorigdstport */ + if (!strtonum(optarg, NULL, &port, 0, ~(u_int16_t)0)) + param_act(P_BAD_VALUE, "conntrack", + "--ctorigdstport", optarg); + info->match_flags |= XT_CONNTRACK_ORIGDST_PORT; + info->origdst_port = htons(port); + if (invert) + info->invert_flags |= XT_CONNTRACK_ORIGDST_PORT; + break; + + case 'c': /* --ctreplsrcport */ + if (!strtonum(optarg, NULL, &port, 0, ~(u_int16_t)0)) + param_act(P_BAD_VALUE, "conntrack", + "--ctreplsrcport", optarg); + info->match_flags |= XT_CONNTRACK_REPLSRC_PORT; + info->replsrc_port = htons(port); + if (invert) + info->invert_flags |= XT_CONNTRACK_REPLSRC_PORT; + break; + + case 'd': /* --ctrepldstport */ + if (!strtonum(optarg, NULL, &port, 0, ~(u_int16_t)0)) + param_act(P_BAD_VALUE, "conntrack", + "--ctrepldstport", optarg); + info->match_flags |= XT_CONNTRACK_REPLDST_PORT; + info->repldst_port = htons(port); + if (invert) + info->invert_flags |= XT_CONNTRACK_REPLDST_PORT; + break; + + case 'e': /* --ctdir */ + param_act(P_NO_INVERT, "conntrack", "--ctdir", invert); + if (strcasecmp(optarg, "ORIGINAL") == 0) { + info->match_flags |= XT_CONNTRACK_DIRECTION; + info->invert_flags &= ~XT_CONNTRACK_DIRECTION; + } else if (strcasecmp(optarg, "REPLY") == 0) { + info->match_flags |= XT_CONNTRACK_DIRECTION; + info->invert_flags |= XT_CONNTRACK_DIRECTION; + } else { + param_act(P_BAD_VALUE, "conntrack", "--ctdir", optarg); + } + break; + + default: + return false; + } + + *flags = info->match_flags; + return true; +} + +static int +conntrack_mt4_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_match **match) +{ + struct xt_conntrack_mtinfo1 *info = (void *)(*match)->data; + struct in_addr *addr = NULL; + unsigned int naddrs = 0; + + switch (c) { + case '3': /* --ctorigsrc */ + ipparse_hostnetworkmask(optarg, &addr, &info->origsrc_mask.in, + &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->origsrc_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_ORIGSRC; + if (invert) + info->invert_flags |= XT_CONNTRACK_ORIGSRC; + break; + + case '4': /* --ctorigdst */ + ipparse_hostnetworkmask(optarg, &addr, &info->origdst_mask.in, + &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->origdst_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_ORIGDST; + if (invert) + info->invert_flags |= XT_CONNTRACK_ORIGDST; + break; + + case '5': /* --ctreplsrc */ + ipparse_hostnetworkmask(optarg, &addr, &info->replsrc_mask.in, + &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->replsrc_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_REPLSRC; + if (invert) + info->invert_flags |= XT_CONNTRACK_REPLSRC; + break; + + case '6': /* --ctrepldst */ + ipparse_hostnetworkmask(optarg, &addr, &info->repldst_mask.in, + &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->repldst_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_REPLDST; + if (invert) + info->invert_flags |= XT_CONNTRACK_REPLDST; + break; + + + default: + return conntrack_mt_parse(c, argv, invert, flags, match); + } + + *flags = info->match_flags; + return true; +} + +static int +conntrack_mt6_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_match **match) +{ + struct xt_conntrack_mtinfo1 *info = (void *)(*match)->data; + struct in6_addr *addr = NULL; + unsigned int naddrs = 0; + + switch (c) { + case '3': /* --ctorigsrc */ + ip6parse_hostnetworkmask(optarg, &addr, + &info->origsrc_mask.in6, &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->origsrc_addr.in6, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_ORIGSRC; + if (invert) + info->invert_flags |= XT_CONNTRACK_ORIGSRC; + break; + + case '4': /* --ctorigdst */ + ip6parse_hostnetworkmask(optarg, &addr, + &info->origdst_mask.in6, &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->origdst_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_ORIGDST; + if (invert) + info->invert_flags |= XT_CONNTRACK_ORIGDST; + break; + + case '5': /* --ctreplsrc */ + ip6parse_hostnetworkmask(optarg, &addr, + &info->replsrc_mask.in6, &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->replsrc_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_REPLSRC; + if (invert) + info->invert_flags |= XT_CONNTRACK_REPLSRC; + break; + + case '6': /* --ctrepldst */ + ip6parse_hostnetworkmask(optarg, &addr, + &info->repldst_mask.in6, &naddrs); + if (naddrs > 1) + exit_error(PARAMETER_PROBLEM, + "multiple IP addresses not allowed"); + if (naddrs == 1) + memcpy(&info->repldst_addr.in, addr, sizeof(*addr)); + info->match_flags |= XT_CONNTRACK_REPLDST; + if (invert) + info->invert_flags |= XT_CONNTRACK_REPLDST; + break; + + + default: + return conntrack_mt_parse(c, argv, invert, flags, match); + } + + *flags = info->match_flags; + return true; +} + static void conntrack_mt_check(unsigned int flags) { if (flags == 0) - exit_error(PARAMETER_PROBLEM, "You must specify one or more options"); + exit_error(PARAMETER_PROBLEM, "conntrack: At least one option " + "is required"); } static void @@ -364,19 +741,36 @@ print_status(unsigned int statusmask) printf("%sASSURED", sep); sep = ","; } -#ifdef IPS_CONFIRMED if (statusmask & IPS_CONFIRMED) { printf("%sCONFIRMED", sep); - sep =","; - } -#endif - if (statusmask == 0) { - printf("%sNONE", sep); sep = ","; } + if (statusmask == 0) + printf("%sNONE", sep); printf(" "); } +static void +conntrack_dump_addr(const union nf_inet_addr *addr, + const union nf_inet_addr *mask, + unsigned int family, bool numeric) +{ + if (family == AF_INET) { + if (!numeric && addr->ip == 0) { + printf("anywhere "); + return; + } + printf("%s ", ipaddr_to_anyname(&addr->in)); + } else if (family == AF_INET6) { + if (!numeric && addr->ip6[0] == 0 && addr->ip6[1] == 0 && + addr->ip6[2] == 0 && addr->ip6[3] == 0) { + printf("anywhere "); + return; + } + printf("%s ", ip6addr_to_anyname(&addr->in6)); + } +} + static void print_addr(struct in_addr *addr, struct in_addr *mask, int inv, int numeric) { @@ -484,6 +878,103 @@ matchinfo_print(const void *ip, const struct xt_entry_match *match, int numeric, } } +static void +conntrack_dump(const struct xt_conntrack_mtinfo1 *info, const char *prefix, + unsigned int family, bool numeric) +{ + if (info->match_flags & XT_CONNTRACK_STATE) { + if (info->invert_flags & XT_CONNTRACK_STATE) + printf("! "); + printf("%sctstate ", prefix); + print_state(info->state_mask); + } + + if (info->match_flags & XT_CONNTRACK_PROTO) { + if (info->invert_flags & XT_CONNTRACK_PROTO) + printf("! "); + printf("%sctproto %u ", prefix, info->l4proto); + } + + if (info->match_flags & XT_CONNTRACK_ORIGSRC) { + if (info->invert_flags & XT_CONNTRACK_PROTO) + printf("! "); + printf("%sctorigsrc ", prefix); + conntrack_dump_addr(&info->origsrc_addr, &info->origsrc_mask, + family, numeric); + } + + if (info->match_flags & XT_CONNTRACK_ORIGDST) { + if (info->invert_flags & XT_CONNTRACK_PROTO) + printf("! "); + printf("%sctorigdst ", prefix); + conntrack_dump_addr(&info->origdst_addr, &info->origdst_mask, + family, numeric); + } + + if (info->match_flags & XT_CONNTRACK_REPLSRC) { + if (info->invert_flags & XT_CONNTRACK_PROTO) + printf("! "); + printf("%sctreplsrc ", prefix); + conntrack_dump_addr(&info->replsrc_addr, &info->replsrc_mask, + family, numeric); + } + + if (info->match_flags & XT_CONNTRACK_REPLDST) { + if (info->invert_flags & XT_CONNTRACK_PROTO) + printf("! "); + printf("%sctrepldst ", prefix); + conntrack_dump_addr(&info->repldst_addr, &info->repldst_mask, + family, numeric); + } + + if (info->match_flags & XT_CONNTRACK_ORIGSRC_PORT) { + if (info->invert_flags & XT_CONNTRACK_ORIGSRC_PORT) + printf("! "); + printf("%sctorigsrcport %u ", prefix, + ntohs(info->origsrc_port)); + } + + if (info->match_flags & XT_CONNTRACK_ORIGDST_PORT) { + if (info->invert_flags & XT_CONNTRACK_ORIGDST_PORT) + printf("! "); + printf("%sctorigdstport %u ", prefix, + ntohs(info->origdst_port)); + } + + if (info->match_flags & XT_CONNTRACK_REPLSRC_PORT) { + if (info->invert_flags & XT_CONNTRACK_REPLSRC_PORT) + printf("! "); + printf("%sctreplsrcport %u ", prefix, + ntohs(info->replsrc_port)); + } + + if (info->match_flags & XT_CONNTRACK_REPLDST_PORT) { + if (info->invert_flags & XT_CONNTRACK_REPLDST_PORT) + printf("! "); + printf("%sctrepldstport %u ", prefix, + ntohs(info->repldst_port)); + } + + if (info->match_flags & XT_CONNTRACK_STATUS) { + if (info->invert_flags & XT_CONNTRACK_STATUS) + printf("! "); + printf("%sctstatus ", prefix); + print_status(info->status_mask); + } + + if (info->match_flags & XT_CONNTRACK_EXPIRES) { + if (info->invert_flags & XT_CONNTRACK_EXPIRES) + printf("! "); + printf("%sctexpire ", prefix); + + if (info->expires_max == info->expires_min) + printf("%u ", (unsigned int)info->expires_min); + else + printf("%u:%u ", (unsigned int)info->expires_min, + (unsigned int)info->expires_max); + } +} + /* Prints out the matchinfo. */ static void conntrack_print(const void *ip, const struct xt_entry_match *match, int numeric) @@ -491,12 +982,38 @@ static void conntrack_print(const void *ip, const struct xt_entry_match *match, matchinfo_print(ip, match, numeric, ""); } +static void +conntrack_mt_print(const void *ip, const struct xt_entry_match *match, + int numeric) +{ + conntrack_dump((const void *)match->data, "", AF_INET, numeric); +} + +static void +conntrack_mt6_print(const void *ip, const struct xt_entry_match *match, + int numeric) +{ + conntrack_dump((const void *)match->data, "", AF_INET6, numeric); +} + /* Saves the matchinfo in parsable form to stdout. */ static void conntrack_save(const void *ip, const struct xt_entry_match *match) { matchinfo_print(ip, match, 1, "--"); } +static void conntrack_mt_save(const void *ip, + const struct xt_entry_match *match) +{ + conntrack_dump((const void *)match->data, "--", AF_INET, true); +} + +static void conntrack_mt6_save(const void *ip, + const struct xt_entry_match *match) +{ + conntrack_dump((const void *)match->data, "--", AF_INET6, true); +} + static struct xtables_match conntrack_match = { .version = IPTABLES_VERSION, .name = "conntrack", @@ -509,10 +1026,42 @@ static struct xtables_match conntrack_match = { .final_check = conntrack_mt_check, .print = conntrack_print, .save = conntrack_save, + .extra_opts = conntrack_mt_opts_v0, +}; + +static struct xtables_match conntrack_mt_reg = { + .version = IPTABLES_VERSION, + .name = "conntrack", + .revision = 1, + .family = AF_INET, + .size = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)), + .userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)), + .help = conntrack_mt_help, + .parse = conntrack_mt4_parse, + .final_check = conntrack_mt_check, + .print = conntrack_mt_print, + .save = conntrack_mt_save, + .extra_opts = conntrack_mt_opts, +}; + +static struct xtables_match conntrack_mt6_reg = { + .version = IPTABLES_VERSION, + .name = "conntrack", + .revision = 1, + .family = AF_INET6, + .size = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)), + .userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_mtinfo1)), + .help = conntrack_mt_help, + .parse = conntrack_mt6_parse, + .final_check = conntrack_mt_check, + .print = conntrack_mt6_print, + .save = conntrack_mt6_save, .extra_opts = conntrack_mt_opts, }; void _init(void) { xtables_register_match(&conntrack_match); + xtables_register_match(&conntrack_mt_reg); + xtables_register_match(&conntrack_mt6_reg); } diff --git a/extensions/libxt_conntrack.man b/extensions/libxt_conntrack.man index b852bca..17c6dd2 100644 --- a/extensions/libxt_conntrack.man +++ b/extensions/libxt_conntrack.man @@ -9,16 +9,22 @@ Possible states are listed below. Layer-4 protocol to match (by number or name) .TP [\fB!\fR] \fB--ctorigsrc\fR \fIaddress\fR[\fB/\fR\fImask\fR] -Match against original source address .TP [\fB!\fR] \fB--ctorigdst\fR \fIaddress\fR[\fB/\fR\fImask\fR] -Match against original destination address .TP [\fB!\fR] \fB--ctreplsrc\fR \fIaddress\fR[\fB/\fR\fImask\fR] -Match against reply source address .TP [\fB!\fR] \fB--ctrepldst\fR \fIaddress\fR[\fB/\fR\fImask\fR] -Match against reply destination address +Match against original/reply source/destination address +.TP +[\fB!\fR] \fB--ctorigsrcport\fR \fIport\fR +.TP +[\fB!\fR] \fB--ctorigdstport\fR \fIport\fR +.TP +[\fB!\fR] \fB--ctreplsrcport\fR \fIport\fR +.TP +[\fB!\fR] \fB--ctrepldstport\fR \fIport\fR +Match against original/reply source/destination port (TCP/UDP/etc.) or GRE key. .TP [\fB!\fR] \fB--ctstatus\fR \fIstatelist\fR \fIstatuslist\fR is a comma separated list of the connection statuses to match. @@ -27,6 +33,10 @@ Possible statuses are listed below. [\fB!\fR] \fB--ctexpire\fR \fItime\fR[\fB:\fR\fItime\fR] Match remaining lifetime in seconds against given value or range of values (inclusive) +.TP +\fB--ctdir\fR {\fBORIGINAL\fR|\fBREPLY\fR} +Match packets that are flowing in the specified direction. If this flag is not +specified at all, matches packets in both directions. .PP States for \fB--ctstate\fR: .TP -- cgit v1.2.3