+++ /dev/null
-/*
- * 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 <jengelh@computergmbh.de>
- */
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <ctype.h>
-#include <getopt.h>
-#include <netdb.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <iptables.h>
-#include <xtables.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter/xt_conntrack.h>
-#include <linux/netfilter/nf_conntrack_common.h>
-#include <arpa/inet.h>
-
-/* Function which prints out usage message. */
-static void conntrack_mt_help(void)
-{
- printf(
-"conntrack match options:\n"
-"[!] --ctstate {INVALID|ESTABLISHED|NEW|RELATED|UNTRACKED|SNAT|DNAT}[,...]\n"
-" State(s) to match\n"
-"[!] --ctproto proto Protocol to match; by number or name, e.g. \"tcp\"\n"
-"[!] --ctorigsrc address[/mask]\n"
-"[!] --ctorigdst address[/mask]\n"
-"[!] --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");
-}
-
-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'},
- {.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 = NULL }
-};
-
-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'},
- {.name = NULL},
-};
-
-static int
-parse_state(const char *state, size_t len, struct xt_conntrack_info *sinfo)
-{
- if (strncasecmp(state, "INVALID", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_INVALID;
- else if (strncasecmp(state, "NEW", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_BIT(IP_CT_NEW);
- else if (strncasecmp(state, "ESTABLISHED", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_BIT(IP_CT_ESTABLISHED);
- else if (strncasecmp(state, "RELATED", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_BIT(IP_CT_RELATED);
- else if (strncasecmp(state, "UNTRACKED", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_UNTRACKED;
- else if (strncasecmp(state, "SNAT", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_SNAT;
- else if (strncasecmp(state, "DNAT", len) == 0)
- sinfo->statemask |= XT_CONNTRACK_STATE_DNAT;
- else
- return 0;
- return 1;
-}
-
-static void
-parse_states(const char *arg, struct xt_conntrack_info *sinfo)
-{
- const char *comma;
-
- while ((comma = strchr(arg, ',')) != NULL) {
- if (comma == arg || !parse_state(arg, comma-arg, sinfo))
- exit_error(PARAMETER_PROBLEM, "Bad ctstate `%s'", arg);
- arg = comma+1;
- }
-
- if (strlen(arg) == 0 || !parse_state(arg, strlen(arg), 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 len, struct xt_conntrack_info *sinfo)
-{
- if (strncasecmp(status, "NONE", len) == 0)
- sinfo->statusmask |= 0;
- else if (strncasecmp(status, "EXPECTED", len) == 0)
- sinfo->statusmask |= IPS_EXPECTED;
- else if (strncasecmp(status, "SEEN_REPLY", len) == 0)
- sinfo->statusmask |= IPS_SEEN_REPLY;
- else if (strncasecmp(status, "ASSURED", len) == 0)
- sinfo->statusmask |= IPS_ASSURED;
-#ifdef IPS_CONFIRMED
- else if (strncasecmp(status, "CONFIRMED", len) == 0)
- sinfo->statusmask |= IPS_CONFIRMED;
-#endif
- else
- return 0;
- return 1;
-}
-
-static void
-parse_statuses(const char *arg, struct xt_conntrack_info *sinfo)
-{
- const char *comma;
-
- while ((comma = strchr(arg, ',')) != NULL) {
- if (comma == arg || !parse_status(arg, comma-arg, sinfo))
- exit_error(PARAMETER_PROBLEM, "Bad ctstatus `%s'", arg);
- arg = comma+1;
- }
-
- if (strlen(arg) == 0 || !parse_status(arg, strlen(arg), 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)
-{
- unsigned int len;
-
- if (string_to_number(s, 0, 0, &len) == -1)
- exit_error(PARAMETER_PROBLEM, "expire value invalid: `%s'\n", s);
- else
- return len;
-}
-
-/* If a single value is provided, min and max are both set to the value */
-static void
-parse_expires(const char *s, struct xt_conntrack_info *sinfo)
-{
- char *buffer;
- char *cp;
-
- buffer = strdup(s);
- if ((cp = strchr(buffer, ':')) == NULL)
- sinfo->expires_min = sinfo->expires_max =
- parse_expire(buffer);
- else {
- *cp = '\0';
- cp++;
-
- sinfo->expires_min = buffer[0] ? parse_expire(buffer) : 0;
- sinfo->expires_max = cp[0]
- ? parse_expire(cp)
- : (unsigned long)-1;
- }
- free(buffer);
-
- if (sinfo->expires_min > sinfo->expires_max)
- exit_error(PARAMETER_PROBLEM,
- "expire min. range value `%lu' greater than max. "
- "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,
- const void *entry, struct xt_entry_match **match)
-{
- struct xt_conntrack_info *sinfo = (void *)(*match)->data;
- char *protocol = NULL;
- unsigned int naddrs = 0;
- struct in_addr *addrs = NULL;
-
-
- switch (c) {
- case '1':
- check_inverse(optarg, &invert, &optind, 0);
-
- parse_states(argv[optind-1], sinfo);
- if (invert) {
- sinfo->invflags |= XT_CONNTRACK_STATE;
- }
- sinfo->flags |= XT_CONNTRACK_STATE;
- break;
-
- case '2':
- check_inverse(optarg, &invert, &optind, 0);
-
- if(invert)
- sinfo->invflags |= XT_CONNTRACK_PROTO;
-
- /* Canonicalize into lower case */
- for (protocol = argv[optind-1]; *protocol; protocol++)
- *protocol = tolower(*protocol);
-
- protocol = argv[optind-1];
- sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum = parse_protocol(protocol);
-
- if (sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum == 0
- && (sinfo->invflags & XT_INV_PROTO))
- exit_error(PARAMETER_PROBLEM,
- "rule would never match protocol");
-
- sinfo->flags |= XT_CONNTRACK_PROTO;
- break;
-
- case '3':
- check_inverse(optarg, &invert, &optind, 0);
-
- if (invert)
- sinfo->invflags |= XT_CONNTRACK_ORIGSRC;
-
- ipparse_hostnetworkmask(argv[optind-1], &addrs,
- &sinfo->sipmsk[IP_CT_DIR_ORIGINAL],
- &naddrs);
- if(naddrs > 1)
- exit_error(PARAMETER_PROBLEM,
- "multiple IP addresses not allowed");
-
- if(naddrs == 1) {
- sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip = addrs[0].s_addr;
- }
-
- sinfo->flags |= XT_CONNTRACK_ORIGSRC;
- break;
-
- case '4':
- check_inverse(optarg, &invert, &optind, 0);
-
- if (invert)
- sinfo->invflags |= XT_CONNTRACK_ORIGDST;
-
- ipparse_hostnetworkmask(argv[optind-1], &addrs,
- &sinfo->dipmsk[IP_CT_DIR_ORIGINAL],
- &naddrs);
- if(naddrs > 1)
- exit_error(PARAMETER_PROBLEM,
- "multiple IP addresses not allowed");
-
- if(naddrs == 1) {
- sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip = addrs[0].s_addr;
- }
-
- sinfo->flags |= XT_CONNTRACK_ORIGDST;
- break;
-
- case '5':
- check_inverse(optarg, &invert, &optind, 0);
-
- if (invert)
- sinfo->invflags |= XT_CONNTRACK_REPLSRC;
-
- ipparse_hostnetworkmask(argv[optind-1], &addrs,
- &sinfo->sipmsk[IP_CT_DIR_REPLY],
- &naddrs);
- if(naddrs > 1)
- exit_error(PARAMETER_PROBLEM,
- "multiple IP addresses not allowed");
-
- if(naddrs == 1) {
- sinfo->tuple[IP_CT_DIR_REPLY].src.ip = addrs[0].s_addr;
- }
-
- sinfo->flags |= XT_CONNTRACK_REPLSRC;
- break;
-
- case '6':
- check_inverse(optarg, &invert, &optind, 0);
-
- if (invert)
- sinfo->invflags |= XT_CONNTRACK_REPLDST;
-
- ipparse_hostnetworkmask(argv[optind-1], &addrs,
- &sinfo->dipmsk[IP_CT_DIR_REPLY],
- &naddrs);
- if(naddrs > 1)
- exit_error(PARAMETER_PROBLEM,
- "multiple IP addresses not allowed");
-
- if(naddrs == 1) {
- sinfo->tuple[IP_CT_DIR_REPLY].dst.ip = addrs[0].s_addr;
- }
-
- sinfo->flags |= XT_CONNTRACK_REPLDST;
- break;
-
- case '7':
- check_inverse(optarg, &invert, &optind, 0);
-
- parse_statuses(argv[optind-1], sinfo);
- if (invert) {
- sinfo->invflags |= XT_CONNTRACK_STATUS;
- }
- sinfo->flags |= XT_CONNTRACK_STATUS;
- break;
-
- case '8':
- check_inverse(optarg, &invert, &optind, 0);
-
- parse_expires(argv[optind-1], sinfo);
- if (invert) {
- sinfo->invflags |= XT_CONNTRACK_EXPIRES;
- }
- sinfo->flags |= XT_CONNTRACK_EXPIRES;
- break;
-
- default:
- return 0;
- }
-
- *flags = sinfo->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, "conntrack: At least one option "
- "is required");
-}
-
-static void
-print_state(unsigned int statemask)
-{
- const char *sep = "";
-
- if (statemask & XT_CONNTRACK_STATE_INVALID) {
- printf("%sINVALID", sep);
- sep = ",";
- }
- if (statemask & XT_CONNTRACK_STATE_BIT(IP_CT_NEW)) {
- printf("%sNEW", sep);
- sep = ",";
- }
- if (statemask & XT_CONNTRACK_STATE_BIT(IP_CT_RELATED)) {
- printf("%sRELATED", sep);
- sep = ",";
- }
- if (statemask & XT_CONNTRACK_STATE_BIT(IP_CT_ESTABLISHED)) {
- printf("%sESTABLISHED", sep);
- sep = ",";
- }
- if (statemask & XT_CONNTRACK_STATE_UNTRACKED) {
- printf("%sUNTRACKED", sep);
- sep = ",";
- }
- if (statemask & XT_CONNTRACK_STATE_SNAT) {
- printf("%sSNAT", sep);
- sep = ",";
- }
- if (statemask & XT_CONNTRACK_STATE_DNAT) {
- printf("%sDNAT", sep);
- sep = ",";
- }
- printf(" ");
-}
-
-static void
-print_status(unsigned int statusmask)
-{
- const char *sep = "";
-
- if (statusmask & IPS_EXPECTED) {
- printf("%sEXPECTED", sep);
- sep = ",";
- }
- if (statusmask & IPS_SEEN_REPLY) {
- printf("%sSEEN_REPLY", sep);
- sep = ",";
- }
- if (statusmask & IPS_ASSURED) {
- printf("%sASSURED", sep);
- sep = ",";
- }
- if (statusmask & IPS_CONFIRMED) {
- printf("%sCONFIRMED", 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)
-{
- char buf[BUFSIZ];
-
- if (inv)
- printf("! ");
-
- if (mask->s_addr == 0L && !numeric)
- printf("%s ", "anywhere");
- else {
- if (numeric)
- sprintf(buf, "%s", ipaddr_to_numeric(addr));
- else
- sprintf(buf, "%s", ipaddr_to_anyname(addr));
- strcat(buf, ipmask_to_numeric(mask));
- printf("%s ", buf);
- }
-}
-
-/* Saves the matchinfo in parsable form to stdout. */
-static void
-matchinfo_print(const void *ip, const struct xt_entry_match *match, int numeric, const char *optpfx)
-{
- struct xt_conntrack_info *sinfo = (void *)match->data;
-
- if(sinfo->flags & XT_CONNTRACK_STATE) {
- if (sinfo->invflags & XT_CONNTRACK_STATE)
- printf("! ");
- printf("%sctstate ", optpfx);
- print_state(sinfo->statemask);
- }
-
- if(sinfo->flags & XT_CONNTRACK_PROTO) {
- if (sinfo->invflags & XT_CONNTRACK_PROTO)
- printf("! ");
- printf("%sctproto ", optpfx);
- printf("%u ", sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum);
- }
-
- if(sinfo->flags & XT_CONNTRACK_ORIGSRC) {
- if (sinfo->invflags & XT_CONNTRACK_ORIGSRC)
- printf("! ");
- printf("%sctorigsrc ", optpfx);
-
- print_addr(
- (struct in_addr *)&sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
- &sinfo->sipmsk[IP_CT_DIR_ORIGINAL],
- false,
- numeric);
- }
-
- if(sinfo->flags & XT_CONNTRACK_ORIGDST) {
- if (sinfo->invflags & XT_CONNTRACK_ORIGDST)
- printf("! ");
- printf("%sctorigdst ", optpfx);
-
- print_addr(
- (struct in_addr *)&sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
- &sinfo->dipmsk[IP_CT_DIR_ORIGINAL],
- false,
- numeric);
- }
-
- if(sinfo->flags & XT_CONNTRACK_REPLSRC) {
- if (sinfo->invflags & XT_CONNTRACK_REPLSRC)
- printf("! ");
- printf("%sctreplsrc ", optpfx);
-
- print_addr(
- (struct in_addr *)&sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
- &sinfo->sipmsk[IP_CT_DIR_REPLY],
- false,
- numeric);
- }
-
- if(sinfo->flags & XT_CONNTRACK_REPLDST) {
- if (sinfo->invflags & XT_CONNTRACK_REPLDST)
- printf("! ");
- printf("%sctrepldst ", optpfx);
-
- print_addr(
- (struct in_addr *)&sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
- &sinfo->dipmsk[IP_CT_DIR_REPLY],
- false,
- numeric);
- }
-
- if(sinfo->flags & XT_CONNTRACK_STATUS) {
- if (sinfo->invflags & XT_CONNTRACK_STATUS)
- printf("! ");
- printf("%sctstatus ", optpfx);
- print_status(sinfo->statusmask);
- }
-
- if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
- if (sinfo->invflags & XT_CONNTRACK_EXPIRES)
- printf("! ");
- printf("%sctexpire ", optpfx);
-
- if (sinfo->expires_max == sinfo->expires_min)
- printf("%lu ", sinfo->expires_min);
- else
- printf("%lu:%lu ", sinfo->expires_min, sinfo->expires_max);
- }
-}
-
-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)
-{
- 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 = XTABLES_VERSION,
- .name = "conntrack",
- .revision = 0,
- .family = AF_INET,
- .size = XT_ALIGN(sizeof(struct xt_conntrack_info)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_conntrack_info)),
- .help = conntrack_mt_help,
- .parse = conntrack_parse,
- .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 = XTABLES_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 = XTABLES_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);
-}
git://git.onelab.eu / iptables.git / blobdiff