]> git.ipfire.org Git - thirdparty/iptables.git/commitdiff
Port of IPv6 owner match, fixes for IPv6 limit mac and multiport matches (Jan Rekorajski)
authorJan Rekorajski <baggins@sith.mimuw.edu.pl>
Fri, 16 Feb 2001 15:19:51 +0000 (15:19 +0000)
committerHarald Welte <laforge@gnumonks.org>
Fri, 16 Feb 2001 15:19:51 +0000 (15:19 +0000)
extensions/.owner-test6 [new file with mode: 0755]
extensions/libip6t_limit.c [new file with mode: 0644]
extensions/libip6t_mac.c [new file with mode: 0644]
extensions/libip6t_multiport.c [new file with mode: 0644]
extensions/libip6t_owner.c [new file with mode: 0644]

diff --git a/extensions/.owner-test6 b/extensions/.owner-test6
new file mode 100755 (executable)
index 0000000..9d46e2b
--- /dev/null
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv6/ip6t_owner.h ] && echo owner limit mac multiport
diff --git a/extensions/libip6t_limit.c b/extensions/libip6t_limit.c
new file mode 100644 (file)
index 0000000..3b0318b
--- /dev/null
@@ -0,0 +1,198 @@
+/* Shared library add-on to iptables to add limit support.
+ *
+ * Jérôme de Vivie   <devivie@info.enserb.u-bordeaux.fr>
+ * Hervé Eychenne   <eychenne@info.enserb.u-bordeaux.fr>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <ip6tables.h>
+#include <stddef.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv6/ip6t_limit.h>
+
+#define IP6T_LIMIT_AVG "3/hour"
+#define IP6T_LIMIT_BURST       5
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+       printf(
+"limit v%s options:\n"
+"--limit avg                   max average match rate: default "IP6T_LIMIT_AVG"\n"
+"                                [Packets per second unless followed by \n"
+"                                /sec /minute /hour /day postfixes]\n"
+"--limit-burst number          number to match in a burst, default %u\n"
+"\n", NETFILTER_VERSION, IP6T_LIMIT_BURST);
+}
+
+static struct option opts[] = {
+       { "limit", 1, 0, '%' },
+       { "limit-burst", 1, 0, '$' },
+       { 0 }
+};
+
+static
+int parse_rate(const char *rate, u_int32_t *val)
+{
+       const char *delim;
+       u_int32_t r;
+       u_int32_t mult = 1;  /* Seconds by default. */
+
+       delim = strchr(rate, '/');
+       if (delim) {
+               if (strlen(delim+1) == 0)
+                       return 0;
+
+               if (strncasecmp(delim+1, "second", strlen(delim+1)) == 0)
+                       mult = 1;
+               else if (strncasecmp(delim+1, "minute", strlen(delim+1)) == 0)
+                       mult = 60;
+               else if (strncasecmp(delim+1, "hour", strlen(delim+1)) == 0)
+                       mult = 60*60;
+               else if (strncasecmp(delim+1, "day", strlen(delim+1)) == 0)
+                       mult = 24*60*60;
+               else
+                       return 0;
+       }
+       r = atoi(rate);
+       if (!r)
+               return 0;
+
+       /* This would get mapped to infinite (1/day is minimum they
+           can specify, so we're ok at that end). */
+       if (r / mult > IP6T_LIMIT_SCALE)
+               exit_error(PARAMETER_PROBLEM, "Rate too fast `%s'\n", rate);
+
+       *val = IP6T_LIMIT_SCALE * mult / r;
+       return 1;
+}
+
+/* Initialize the match. */
+static void
+init(struct ip6t_entry_match *m, unsigned int *nfcache)
+{
+       struct ip6t_rateinfo *r = (struct ip6t_rateinfo *)m->data;
+
+       parse_rate(IP6T_LIMIT_AVG, &r->avg);
+       r->burst = IP6T_LIMIT_BURST;
+
+       /* Can't cache this */
+       *nfcache |= NFC_UNKNOWN;
+}
+
+/* FIXME: handle overflow:
+       if (r->avg*r->burst/r->burst != r->avg)
+               exit_error(PARAMETER_PROBLEM,
+                          "Sorry: burst too large for that avg rate.\n");
+*/
+
+/* Function which parses command options; returns true if it
+   ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ip6t_entry *entry,
+      unsigned int *nfcache,
+      struct ip6t_entry_match **match)
+{
+       struct ip6t_rateinfo *r = (struct ip6t_rateinfo *)(*match)->data;
+       int num;
+
+       switch(c) {
+       case '%':
+               if (check_inverse(optarg, &invert))
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Unexpected `!' after --limit");
+               if (!parse_rate(optarg, &r->avg))
+                       exit_error(PARAMETER_PROBLEM,
+                                  "bad rate `%s'", optarg);
+               break;
+
+       case '$':
+               if (check_inverse(optarg, &invert))
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Unexpected `!' after --limit-burst");
+
+               num = string_to_number(optarg, 0, 10000);
+               if (num <= 0)
+                       exit_error(PARAMETER_PROBLEM,
+                                  "bad --limit-burst `%s'", optarg);
+               r->burst = num;
+               break;
+
+       default:
+               return 0;
+       }
+
+       return 1;
+}
+
+/* Final check; nothing. */
+static void final_check(unsigned int flags)
+{
+}
+
+static struct rates
+{
+       const char *name;
+       u_int32_t mult;
+} rates[] = { { "day", IP6T_LIMIT_SCALE*24*60*60 },
+             { "hour", IP6T_LIMIT_SCALE*60*60 },
+             { "min", IP6T_LIMIT_SCALE*60 },
+             { "sec", IP6T_LIMIT_SCALE } };
+
+static void print_rate(u_int32_t period)
+{
+       unsigned int i;
+
+       for (i = 1; i < sizeof(rates)/sizeof(struct rates); i++) {
+               if (period > rates[i].mult
+                   || rates[i].mult % period != 0)
+                       break;
+       }
+
+       printf("%u/%s ", rates[i-1].mult / period, rates[i-1].name);
+}
+
+/* Prints out the matchinfo. */
+static void
+print(const struct ip6t_ip6 *ip,
+      const struct ip6t_entry_match *match,
+      int numeric)
+{
+       struct ip6t_rateinfo *r = (struct ip6t_rateinfo *)match->data;
+       printf("limit: avg "); print_rate(r->avg);
+       printf("burst %u ", r->burst);
+}
+
+/* FIXME: Make minimalist: only print rate if not default --RR */
+static void save(const struct ip6t_ip6 *ip, const struct ip6t_entry_match *match)
+{
+       struct ip6t_rateinfo *r = (struct ip6t_rateinfo *)match->data;
+
+       printf("--limit "); print_rate(r->avg);
+       if (r->burst != IP6T_LIMIT_BURST)
+               printf("--limit-burst %u ", r->burst);
+}
+
+struct ip6tables_match limit
+= { NULL,
+    "limit",
+    NETFILTER_VERSION,
+    IP6T_ALIGN(sizeof(struct ip6t_rateinfo)),
+    offsetof(struct ip6t_rateinfo, prev),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+       register_match6(&limit);
+}
diff --git a/extensions/libip6t_mac.c b/extensions/libip6t_mac.c
new file mode 100644 (file)
index 0000000..283c486
--- /dev/null
@@ -0,0 +1,145 @@
+/* Shared library add-on to iptables to add MAC address support. */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#if defined(__GLIBC__) && __GLIBC__ == 2
+#include <net/ethernet.h>
+#else
+#include <linux/if_ether.h>
+#endif
+#include <ip6tables.h>
+#include <linux/netfilter_ipv6/ip6t_mac.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+       printf(
+"MAC v%s options:\n"
+" --mac-source [!] XX:XX:XX:XX:XX:XX\n"
+"                              Match source MAC address\n"
+"\n", NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+       { "mac-source", 1, 0, '1' },
+       {0}
+};
+
+/* Initialize the match. */
+static void
+init(struct ip6t_entry_match *m, unsigned int *nfcache)
+{
+       /* Can't cache this */
+       *nfcache |= NFC_UNKNOWN;
+}
+
+static void
+parse_mac(const char *mac, struct ip6t_mac_info *info)
+{
+       unsigned int i = 0;
+
+       if (strlen(mac) != ETH_ALEN*3-1)
+               exit_error(PARAMETER_PROBLEM, "Bad mac address `%s'", mac);
+
+       for (i = 0; i < ETH_ALEN; i++) {
+               long number;
+               char *end;
+
+               number = strtol(mac + i*3, &end, 16);
+
+               if (end == mac + i*3 + 2
+                   && number >= 0
+                   && number <= 255)
+                       info->srcaddr[i] = number;
+               else
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Bad mac address `%s'", mac);
+       }
+}
+
+/* Function which parses command options; returns true if it
+   ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ip6t_entry *entry,
+      unsigned int *nfcache,
+      struct ip6t_entry_match **match)
+{
+       struct ip6t_mac_info *macinfo = (struct ip6t_mac_info *)(*match)->data;
+
+       switch (c) {
+       case '1':
+               if (check_inverse(optarg, &invert))
+                       optind++;
+               parse_mac(argv[optind-1], macinfo);
+               if (invert)
+                       macinfo->invert = 1;
+               *flags = 1;
+               break;
+
+       default:
+               return 0;
+       }
+
+       return 1;
+}
+
+static void print_mac(unsigned char macaddress[ETH_ALEN], int invert)
+{
+       unsigned int i;
+
+       printf("%s%02X", invert ? "!" : "", macaddress[0]);
+       for (i = 1; i < ETH_ALEN; i++)
+               printf(":%02X", macaddress[i]);
+       printf(" ");
+}
+
+/* Final check; must have specified --mac. */
+static void final_check(unsigned int flags)
+{
+       if (!flags)
+               exit_error(PARAMETER_PROBLEM,
+                          "You must specify `--mac-source'");
+}
+
+/* Prints out the matchinfo. */
+static void
+print(const struct ip6t_ip6 *ip,
+      const struct ip6t_entry_match *match,
+      int numeric)
+{
+       printf("MAC ");
+       print_mac(((struct ip6t_mac_info *)match->data)->srcaddr,
+                 ((struct ip6t_mac_info *)match->data)->invert);
+}
+
+/* Saves the union ip6t_matchinfo in parsable form to stdout. */
+static void save(const struct ip6t_ip6 *ip, const struct ip6t_entry_match *match)
+{
+       printf("--mac ");
+       print_mac(((struct ip6t_mac_info *)match->data)->srcaddr,
+                 ((struct ip6t_mac_info *)match->data)->invert);
+}
+
+struct ip6tables_match mac
+= { NULL,
+    "mac",
+    NETFILTER_VERSION,
+    IP6T_ALIGN(sizeof(struct ip6t_mac_info)),
+    IP6T_ALIGN(sizeof(struct ip6t_mac_info)),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+       register_match6(&mac);
+}
diff --git a/extensions/libip6t_multiport.c b/extensions/libip6t_multiport.c
new file mode 100644 (file)
index 0000000..0fcefde
--- /dev/null
@@ -0,0 +1,263 @@
+/* Shared library add-on to iptables to add multiple TCP port support. */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <ip6tables.h>
+#include <linux/netfilter_ipv6/ip6t_multiport.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+       printf(
+"multiport v%s options:\n"
+" --source-ports port[,port,port...]\n"
+" --sports ...\n"
+"                              match source port(s)\n"
+" --destination-ports port[,port,port...]\n"
+" --dports ...\n"
+"                              match destination port(s)\n"
+" --ports port[,port,port]\n"
+"                              match both source and destination port(s)\n",
+NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+       { "source-ports", 1, 0, '1' },
+       { "sports", 1, 0, '1' }, /* synonym */
+       { "destination-ports", 1, 0, '2' },
+       { "dports", 1, 0, '2' }, /* synonym */
+       { "ports", 1, 0, '3' },
+       {0}
+};
+
+static int
+service_to_port(const char *name, const char *proto)
+{
+       struct servent *service;
+
+       if ((service = getservbyname(name, proto)) != NULL)
+               return ntohs((unsigned short) service->s_port);
+
+               return -1;
+}
+
+static u_int16_t
+parse_port(const char *port, const char *proto)
+{
+       int portnum;
+       if ((portnum = string_to_number(port, 0, 65535)) != -1 ||
+           (portnum = service_to_port(port, proto)) != -1)
+               return (u_int16_t)portnum;
+
+       exit_error(PARAMETER_PROBLEM,
+                  "invalid port/service `%s' specified", port);
+}
+
+static unsigned int
+parse_multi_ports(const char *portstring, u_int16_t *ports, const char *proto)
+{
+       char *buffer, *cp, *next;
+       unsigned int i;
+
+       buffer = strdup(portstring);
+       if (!buffer) exit_error(OTHER_PROBLEM, "strdup failed");
+
+       for (cp=buffer, i=0; cp && i<IP6T_MULTI_PORTS; cp=next,i++)
+       {
+               next=strchr(cp, ',');
+               if (next) *next++='\0';
+               ports[i] = parse_port(cp, proto);
+       }
+       if (cp) exit_error(PARAMETER_PROBLEM, "too many ports specified");
+       free(buffer);
+       return i;
+}
+
+/* Initialize the match. */
+static void
+init(struct ip6t_entry_match *m, unsigned int *nfcache)
+{
+}
+
+static const char *
+check_proto(const struct ip6t_entry *entry)
+{
+       if (entry->ipv6.proto == IPPROTO_TCP)
+               return "tcp";
+       else if (entry->ipv6.proto == IPPROTO_UDP)
+               return "udp";
+       else if (!entry->ipv6.proto)
+               exit_error(PARAMETER_PROBLEM,
+                          "multiport needs `-p tcp' or `-p udp'");
+       else
+               exit_error(PARAMETER_PROBLEM,
+                          "multiport only works with TCP or UDP");
+}
+
+/* Function which parses command options; returns true if it
+   ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ip6t_entry *entry,
+      unsigned int *nfcache,
+      struct ip6t_entry_match **match)
+{
+       const char *proto;
+       struct ip6t_multiport *multiinfo
+               = (struct ip6t_multiport *)(*match)->data;
+
+       switch (c) {
+       case '1':
+               proto = check_proto(entry);
+               multiinfo->count = parse_multi_ports(argv[optind-1],
+                                                    multiinfo->ports, proto);
+               multiinfo->flags = IP6T_MULTIPORT_SOURCE;
+               *nfcache |= NFC_IP6_SRC_PT;
+               break;
+
+       case '2':
+               proto = check_proto(entry);
+               multiinfo->count = parse_multi_ports(argv[optind-1],
+                                                    multiinfo->ports, proto);
+               multiinfo->flags = IP6T_MULTIPORT_DESTINATION;
+               *nfcache |= NFC_IP6_DST_PT;
+               break;
+
+       case '3':
+               proto = check_proto(entry);
+               multiinfo->count = parse_multi_ports(argv[optind-1],
+                                                    multiinfo->ports, proto);
+               multiinfo->flags = IP6T_MULTIPORT_EITHER;
+               *nfcache |= NFC_IP6_SRC_PT | NFC_IP6_DST_PT;
+               break;
+
+       default:
+               return 0;
+       }
+
+       if (*flags)
+               exit_error(PARAMETER_PROBLEM,
+                          "multiport can only have one option");
+       *flags = 1;
+       return 1;
+}
+
+/* Final check; must specify something. */
+static void
+final_check(unsigned int flags)
+{
+       if (!flags)
+               exit_error(PARAMETER_PROBLEM, "multiport expection an option");
+}
+
+static char *
+port_to_service(int port, u_int8_t proto)
+{
+       struct servent *service;
+
+       if ((service = getservbyport(htons(port),
+                                    proto == IPPROTO_TCP ? "tcp" : "udp")))
+               return service->s_name;
+
+       return NULL;
+}
+
+static void
+print_port(u_int16_t port, u_int8_t protocol, int numeric)
+{
+       char *service;
+
+       if (numeric || (service = port_to_service(port, protocol)) == NULL)
+               printf("%u", port);
+       else
+               printf("%s", service);
+}
+
+/* Prints out the matchinfo. */
+static void
+print(const struct ip6t_ip6 *ip,
+      const struct ip6t_entry_match *match,
+      int numeric)
+{
+       const struct ip6t_multiport *multiinfo
+               = (const struct ip6t_multiport *)match->data;
+       unsigned int i;
+
+       printf("multiport ");
+
+       switch (multiinfo->flags) {
+       case IP6T_MULTIPORT_SOURCE:
+               printf("sports ");
+               break;
+
+       case IP6T_MULTIPORT_DESTINATION:
+               printf("dports ");
+               break;
+
+       case IP6T_MULTIPORT_EITHER:
+               printf("ports ");
+               break;
+
+       default:
+               printf("ERROR ");
+               break;
+       }
+
+       for (i=0; i < multiinfo->count; i++) {
+               printf("%s", i ? "," : "");
+               print_port(multiinfo->ports[i], ip->proto, numeric);
+       }
+       printf(" ");
+}
+
+/* Saves the union ip6t_matchinfo in parsable form to stdout. */
+static void save(const struct ip6t_ip6 *ip, const struct ip6t_entry_match *match)
+{
+       const struct ip6t_multiport *multiinfo
+               = (const struct ip6t_multiport *)match->data;
+       unsigned int i;
+
+       switch (multiinfo->flags) {
+       case IP6T_MULTIPORT_SOURCE:
+               printf("--sports ");
+               break;
+
+       case IP6T_MULTIPORT_DESTINATION:
+               printf("--dports ");
+               break;
+
+       case IP6T_MULTIPORT_EITHER:
+               printf("--ports ");
+               break;
+       }
+
+       for (i=0; i < multiinfo->count; i++) {
+               printf("%s", i ? "," : "");
+               print_port(multiinfo->ports[i], ip->proto, 0);
+       }
+       printf(" ");
+}
+
+struct ip6tables_match multiport
+= { NULL,
+    "multiport",
+    NETFILTER_VERSION,
+    IP6T_ALIGN(sizeof(struct ip6t_multiport)),
+    IP6T_ALIGN(sizeof(struct ip6t_multiport)),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void
+_init(void)
+{
+       register_match6(&multiport);
+}
diff --git a/extensions/libip6t_owner.c b/extensions/libip6t_owner.c
new file mode 100644 (file)
index 0000000..7648d65
--- /dev/null
@@ -0,0 +1,220 @@
+/* Shared library add-on to iptables to add OWNER matching support. */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <pwd.h>
+#include <grp.h>
+
+#include <ip6tables.h>
+#include <linux/netfilter_ipv6/ip6t_owner.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+       printf(
+"OWNER match v%s options:\n"
+"[!] --uid-owner userid     Match local uid\n"
+"[!] --gid-owner groupid    Match local gid\n"
+"[!] --pid-owner processid  Match local pid\n"
+"[!] --sid-owner sessionid  Match local sid\n"
+"\n",
+NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+       { "uid-owner", 1, 0, '1' },
+       { "gid-owner", 1, 0, '2' },
+       { "pid-owner", 1, 0, '3' },
+       { "sid-owner", 1, 0, '4' },
+       {0}
+};
+
+/* Initialize the match. */
+static void
+init(struct ip6t_entry_match *m, unsigned int *nfcache)
+{
+       /* Can't cache this. */
+       *nfcache |= NFC_UNKNOWN;
+}
+
+/* Function which parses command options; returns true if it
+   ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+      const struct ip6t_entry *entry,
+      unsigned int *nfcache,
+      struct ip6t_entry_match **match)
+{
+       struct ip6t_owner_info *ownerinfo = (struct ip6t_owner_info *)(*match)->data;
+
+       switch (c) {
+               char *end;
+               struct passwd *pwd;
+               struct group *grp;
+       case '1':
+               if (check_inverse(optarg, &invert))
+                       optind++;
+
+               if ((pwd = getpwnam(optarg)))
+                       ownerinfo->uid = pwd->pw_uid;
+               else {
+                       ownerinfo->uid = strtoul(optarg, &end, 0);
+                       if (*end != '\0' || end == optarg)
+                               exit_error(PARAMETER_PROBLEM, "Bad OWNER UID value `%s'", optarg);
+               }
+               if (invert)
+                       ownerinfo->invert |= IP6T_OWNER_UID;
+               ownerinfo->match |= IP6T_OWNER_UID;
+               *flags = 1;
+               break;
+
+       case '2':
+               if (check_inverse(optarg, &invert))
+                       optind++;
+               if ((grp = getgrnam(optarg)))
+                       ownerinfo->gid = grp->gr_gid;
+               else {
+                       ownerinfo->gid = strtoul(optarg, &end, 0);
+                       if (*end != '\0' || end == optarg)
+                               exit_error(PARAMETER_PROBLEM, "Bad OWNER GID value `%s'", optarg);
+               }
+               if (invert)
+                       ownerinfo->invert |= IP6T_OWNER_GID;
+               ownerinfo->match |= IP6T_OWNER_GID;
+               *flags = 1;
+               break;
+
+       case '3':
+               if (check_inverse(optarg, &invert))
+                       optind++;
+               ownerinfo->pid = strtoul(optarg, &end, 0);
+               if (*end != '\0' || end == optarg)
+                       exit_error(PARAMETER_PROBLEM, "Bad OWNER PID value `%s'", optarg);
+               if (invert)
+                       ownerinfo->invert |= IP6T_OWNER_PID;
+               ownerinfo->match |= IP6T_OWNER_PID;
+               *flags = 1;
+               break;
+
+       case '4':
+               if (check_inverse(optarg, &invert))
+                       optind++;
+               ownerinfo->sid = strtoul(optarg, &end, 0);
+               if (*end != '\0' || end == optarg)
+                       exit_error(PARAMETER_PROBLEM, "Bad OWNER SID value `%s'", optarg);
+               if (invert)
+                       ownerinfo->invert |= IP6T_OWNER_SID;
+               ownerinfo->match |= IP6T_OWNER_SID;
+               *flags = 1;
+               break;
+
+       default:
+               return 0;
+       }
+       return 1;
+}
+
+static void
+print_item(struct ip6t_owner_info *info, u_int8_t flag, int numeric, char *label)
+{
+       if(info->match & flag) {
+
+               printf(label);
+
+               if (info->invert & flag)
+                       fputc('!', stdout);
+
+               switch(info->match & flag) {
+               case IP6T_OWNER_UID:
+                       if(!numeric) {
+                               struct passwd *pwd = getpwuid(info->uid);
+
+                               if(pwd && pwd->pw_name) {
+                                       printf("%s ", pwd->pw_name);
+                                       break;
+                               }
+                               /* FALLTHROUGH */
+                       }
+                       printf("%u ", info->uid);
+                       break;
+               case IP6T_OWNER_GID:
+                       if(!numeric) {
+                               struct group *grp = getgrgid(info->gid);
+
+                               if(grp && grp->gr_name) {
+                                       printf("%s ", grp->gr_name);
+                                       break;
+                               }
+                               /* FALLTHROUGH */
+                       }
+                       printf("%u ", info->gid);
+                       break;
+               case IP6T_OWNER_PID:
+                       printf("%u ", info->pid);
+                       break;
+               case IP6T_OWNER_SID:
+                       printf("%u ", info->sid);
+                       break;
+               default:
+                       break;
+               }
+       }
+}
+
+/* Final check; must have specified --own. */
+static void
+final_check(unsigned int flags)
+{
+       if (!flags)
+               exit_error(PARAMETER_PROBLEM,
+                          "OWNER match: You must specify one or more options");
+}
+
+/* Prints out the matchinfo. */
+static void
+print(const struct ip6t_ip6 *ip,
+      const struct ip6t_entry_match *match,
+      int numeric)
+{
+       struct ip6t_owner_info *info = (struct ip6t_owner_info *)match->data;
+
+       print_item(info, IP6T_OWNER_UID, numeric, "OWNER UID match ");
+       print_item(info, IP6T_OWNER_GID, numeric, "OWNER GID match ");
+       print_item(info, IP6T_OWNER_PID, numeric, "OWNER PID match ");
+       print_item(info, IP6T_OWNER_SID, numeric, "OWNER SID match ");
+}
+
+/* Saves the union ip6t_matchinfo in parsable form to stdout. */
+static void
+save(const struct ip6t_ip6 *ip, const struct ip6t_entry_match *match)
+{
+       struct ip6t_owner_info *info = (struct ip6t_owner_info *)match->data;
+
+       print_item(info, IP6T_OWNER_UID, 0, "--uid-owner ");
+       print_item(info, IP6T_OWNER_GID, 0, "--gid-owner ");
+       print_item(info, IP6T_OWNER_PID, 0, "--pid-owner ");
+       print_item(info, IP6T_OWNER_SID, 0, "--sid-owner ");
+}
+
+struct ip6tables_match owner
+= { NULL,
+    "owner",
+    NETFILTER_VERSION,
+    IP6T_ALIGN(sizeof(struct ip6t_owner_info)),
+    IP6T_ALIGN(sizeof(struct ip6t_owner_info)),
+    &help,
+    &init,
+    &parse,
+    &final_check,
+    &print,
+    &save,
+    opts
+};
+
+void _init(void)
+{
+       register_match6(&owner);
+}