Import libxt_owner into iptables
libxt_owner merges libipt_owner and libip6t_owner, and adds support
for the xt_owner match revision 1.
Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
---
extensions/libip6t_owner.c | 240 ---------------
extensions/libip6t_owner.man | 23 -
extensions/libipt_owner.c | 241 ---------------
extensions/libipt_owner.man | 28 -
extensions/libxt_owner.c | 574 +++++++++++++++++++++++++++++++++++++
extensions/libxt_owner.man | 16 +
include/linux/netfilter/xt_owner.h | 16 +
7 files changed, 606 insertions(+), 532 deletions(-)
Index: iptables-modules/extensions/libip6t_owner.c
===================================================================
--- iptables-modules.orig/extensions/libip6t_owner.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/* 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 owner_help(void)
-{
-#ifdef IP6T_OWNER_COMM
- 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"
-"[!] --cmd-owner name Match local command name\n"
-"\n",
-IPTABLES_VERSION);
-#else
- 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",
-IPTABLES_VERSION);
-#endif /* IP6T_OWNER_COMM */
-}
-
-static const struct option owner_opts[] = {
- { "uid-owner", 1, NULL, '1' },
- { "gid-owner", 1, NULL, '2' },
- { "pid-owner", 1, NULL, '3' },
- { "sid-owner", 1, NULL, '4' },
-#ifdef IP6T_OWNER_COMM
- { "cmd-owner", 1, NULL, '5' },
-#endif
- { }
-};
-
-/* Function which parses command options; returns true if it
- ate an option */
-static int owner_parse(int c, char **argv, int invert, unsigned int *flags,
- const void *entry, struct xt_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':
- check_inverse(optarg, &invert, &optind, 0);
-
- 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':
- check_inverse(optarg, &invert, &optind, 0);
- 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':
- check_inverse(optarg, &invert, &optind, 0);
- 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':
- check_inverse(optarg, &invert, &optind, 0);
- 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;
-
-#ifdef IP6T_OWNER_COMM
- case '5':
- check_inverse(optarg, &invert, &optind, 0);
- if(strlen(optarg) > sizeof(ownerinfo->comm))
- exit_error(PARAMETER_PROBLEM, "OWNER CMD `%s' too long, max %d characters", optarg, sizeof(ownerinfo->comm));
-
- strncpy(ownerinfo->comm, optarg, sizeof(ownerinfo->comm));
- ownerinfo->comm[sizeof(ownerinfo->comm)-1] = '\0';
-
- if (invert)
- ownerinfo->invert |= IP6T_OWNER_COMM;
- ownerinfo->match |= IP6T_OWNER_COMM;
- *flags = 1;
- break;
-#endif
-
- 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) {
-
- if (info->invert & flag)
- printf("! ");
-
- printf(label);
-
- 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;
-#ifdef IP6T_OWNER_COMM
- case IP6T_OWNER_COMM:
- printf("%.*s ", (int)sizeof(info->comm), info->comm);
- break;
-#endif
- default:
- break;
- }
- }
-}
-
-/* Final check; must have specified --own. */
-static void owner_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 owner_print(const void *ip, const struct xt_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 ");
-#ifdef IP6T_OWNER_COMM
- print_item(info, IP6T_OWNER_COMM, numeric, "OWNER CMD match ");
-#endif
-}
-
-/* Saves the union ip6t_matchinfo in parsable form to stdout. */
-static void owner_save(const void *ip, const struct xt_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 ");
-#ifdef IP6T_OWNER_COMM
- print_item(info, IP6T_OWNER_COMM, 0, "--cmd-owner ");
-#endif
-}
-
-static struct ip6tables_match owner_match6 = {
- .name = "owner",
- .version = IPTABLES_VERSION,
- .size = IP6T_ALIGN(sizeof(struct ip6t_owner_info)),
- .userspacesize = IP6T_ALIGN(sizeof(struct ip6t_owner_info)),
- .help = owner_help,
- .parse = owner_parse,
- .final_check = owner_check,
- .print = owner_print,
- .save = owner_save,
- .extra_opts = owner_opts,
-};
-
-void _init(void)
-{
- register_match6(&owner_match6);
-}
Index: iptables-modules/extensions/libip6t_owner.man
===================================================================
--- iptables-modules.orig/extensions/libip6t_owner.man
+++ /dev/null
@@ -1,23 +0,0 @@
-This module attempts to match various characteristics of the packet
-creator, for locally-generated packets. It is only valid in the
-.B OUTPUT
-chain, and even this some packets (such as ICMPv6 ping responses) may
-have no owner, and hence never match. This is regarded as experimental.
-.TP
-.BI "--uid-owner " "userid"
-Matches if the packet was created by a process with the given
-effective user id.
-.TP
-.BI "--gid-owner " "groupid"
-Matches if the packet was created by a process with the given
-effective group id.
-.TP
-.BI "--pid-owner " "processid"
-Matches if the packet was created by a process with the given
-process id.
-.TP
-.BI "--sid-owner " "sessionid"
-Matches if the packet was created by a process in the given session
-group.
-.TP
-.B NOTE: pid, sid and command matching are broken on SMP
Index: iptables-modules/extensions/libipt_owner.c
===================================================================
--- iptables-modules.orig/extensions/libipt_owner.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* 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 <iptables.h>
-#include <linux/netfilter_ipv4/ipt_owner.h>
-
-/* Function which prints out usage message. */
-static void owner_help(void)
-{
-#ifdef IPT_OWNER_COMM
- 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"
-"[!] --cmd-owner name Match local command name\n"
-"NOTE: pid, sid and command matching are broken on SMP\n"
-"\n",
-IPTABLES_VERSION);
-#else
- 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"
-"NOTE: pid and sid matching are broken on SMP\n"
-"\n",
-IPTABLES_VERSION);
-#endif /* IPT_OWNER_COMM */
-}
-
-static const struct option owner_opts[] = {
- { "uid-owner", 1, NULL, '1' },
- { "gid-owner", 1, NULL, '2' },
- { "pid-owner", 1, NULL, '3' },
- { "sid-owner", 1, NULL, '4' },
-#ifdef IPT_OWNER_COMM
- { "cmd-owner", 1, NULL, '5' },
-#endif
- { }
-};
-
-/* Function which parses command options; returns true if it
- ate an option */
-static int owner_parse(int c, char **argv, int invert, unsigned int *flags,
- const void *entry, struct xt_entry_match **match)
-{
- struct ipt_owner_info *ownerinfo = (struct ipt_owner_info *)(*match)->data;
-
- switch (c) {
- char *end;
- struct passwd *pwd;
- struct group *grp;
- case '1':
- check_inverse(optarg, &invert, &optind, 0);
- 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 |= IPT_OWNER_UID;
- ownerinfo->match |= IPT_OWNER_UID;
- *flags = 1;
- break;
-
- case '2':
- check_inverse(optarg, &invert, &optind, 0);
- 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 |= IPT_OWNER_GID;
- ownerinfo->match |= IPT_OWNER_GID;
- *flags = 1;
- break;
-
- case '3':
- check_inverse(optarg, &invert, &optind, 0);
- 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 |= IPT_OWNER_PID;
- ownerinfo->match |= IPT_OWNER_PID;
- *flags = 1;
- break;
-
- case '4':
- check_inverse(optarg, &invert, &optind, 0);
- 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 |= IPT_OWNER_SID;
- ownerinfo->match |= IPT_OWNER_SID;
- *flags = 1;
- break;
-
-#ifdef IPT_OWNER_COMM
- case '5':
- check_inverse(optarg, &invert, &optind, 0);
- if(strlen(optarg) > sizeof(ownerinfo->comm))
- exit_error(PARAMETER_PROBLEM, "OWNER CMD `%s' too long, max %u characters", optarg, (unsigned int)sizeof(ownerinfo->comm));
-
- strncpy(ownerinfo->comm, optarg, sizeof(ownerinfo->comm));
- ownerinfo->comm[sizeof(ownerinfo->comm)-1] = '\0';
-
- if (invert)
- ownerinfo->invert |= IPT_OWNER_COMM;
- ownerinfo->match |= IPT_OWNER_COMM;
- *flags = 1;
- break;
-#endif
-
- default:
- return 0;
- }
- return 1;
-}
-
-static void
-print_item(struct ipt_owner_info *info, u_int8_t flag, int numeric, char *label)
-{
- if(info->match & flag) {
-
- if (info->invert & flag)
- printf("! ");
-
- printf(label);
-
- switch(info->match & flag) {
- case IPT_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 IPT_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 IPT_OWNER_PID:
- printf("%u ", info->pid);
- break;
- case IPT_OWNER_SID:
- printf("%u ", info->sid);
- break;
-#ifdef IPT_OWNER_COMM
- case IPT_OWNER_COMM:
- printf("%.*s ", (int)sizeof(info->comm), info->comm);
- break;
-#endif
- default:
- break;
- }
- }
-}
-
-/* Final check; must have specified --own. */
-static void owner_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 owner_print(const void *ip, const struct xt_entry_match *match,
- int numeric)
-{
- struct ipt_owner_info *info = (struct ipt_owner_info *)match->data;
-
- print_item(info, IPT_OWNER_UID, numeric, "OWNER UID match ");
- print_item(info, IPT_OWNER_GID, numeric, "OWNER GID match ");
- print_item(info, IPT_OWNER_PID, numeric, "OWNER PID match ");
- print_item(info, IPT_OWNER_SID, numeric, "OWNER SID match ");
-#ifdef IPT_OWNER_COMM
- print_item(info, IPT_OWNER_COMM, numeric, "OWNER CMD match ");
-#endif
-}
-
-/* Saves the union ipt_matchinfo in parsable form to stdout. */
-static void owner_save(const void *ip, const struct xt_entry_match *match)
-{
- struct ipt_owner_info *info = (struct ipt_owner_info *)match->data;
-
- print_item(info, IPT_OWNER_UID, 0, "--uid-owner ");
- print_item(info, IPT_OWNER_GID, 0, "--gid-owner ");
- print_item(info, IPT_OWNER_PID, 0, "--pid-owner ");
- print_item(info, IPT_OWNER_SID, 0, "--sid-owner ");
-#ifdef IPT_OWNER_COMM
- print_item(info, IPT_OWNER_COMM, 0, "--cmd-owner ");
-#endif
-}
-
-static struct iptables_match owner_match = {
- .name = "owner",
- .version = IPTABLES_VERSION,
- .size = IPT_ALIGN(sizeof(struct ipt_owner_info)),
- .userspacesize = IPT_ALIGN(sizeof(struct ipt_owner_info)),
- .help = owner_help,
- .parse = owner_parse,
- .final_check = owner_check,
- .print = owner_print,
- .save = owner_save,
- .extra_opts = owner_opts,
-};
-
-void _init(void)
-{
- register_match(&owner_match);
-}
Index: iptables-modules/extensions/libipt_owner.man
===================================================================
--- iptables-modules.orig/extensions/libipt_owner.man
+++ /dev/null
@@ -1,28 +0,0 @@
-This module attempts to match various characteristics of the packet
-creator, for locally-generated packets. It is only valid in the
-.B OUTPUT
-chain, and even this some packets (such as ICMP ping responses) may
-have no owner, and hence never match.
-.TP
-.BI "--uid-owner " "userid"
-Matches if the packet was created by a process with the given
-effective user id.
-.TP
-.BI "--gid-owner " "groupid"
-Matches if the packet was created by a process with the given
-effective group id.
-.TP
-.BI "--pid-owner " "processid"
-Matches if the packet was created by a process with the given
-process id.
-.TP
-.BI "--sid-owner " "sessionid"
-Matches if the packet was created by a process in the given session
-group.
-.TP
-.BI "--cmd-owner " "name"
-Matches if the packet was created by a process with the given command name.
-(this option is present only if iptables was compiled under a kernel
-supporting this feature)
-.TP
-.B NOTE: pid, sid and command matching are broken on SMP
Index: iptables-modules/extensions/libxt_owner.c
===================================================================
--- /dev/null
+++ iptables-modules/extensions/libxt_owner.c
@@ -0,0 +1,574 @@
+/*
+ * libxt_owner - iptables addon for xt_owner
+ *
+ * Copyright © CC Computer Consultants GmbH, 2007 - 2008
+ * Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
+ */
+#include <getopt.h>
+#include <grp.h>
+#include <netdb.h>
+#include <pwd.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <xtables.h>
+#include <linux/netfilter/xt_owner.h>
+#include <linux/netfilter_ipv4/ipt_owner.h>
+#include <linux/netfilter_ipv6/ip6t_owner.h>
+
+enum {
+ FLAG_UID_OWNER = 1 << 0,
+ FLAG_GID_OWNER = 1 << 1,
+ FLAG_SOCKET_EXISTS = 1 << 2,
+ FLAG_PID_OWNER = 1 << 3,
+ FLAG_SID_OWNER = 1 << 4,
+ FLAG_COMM = 1 << 5,
+};
+
+static void owner_mt_help_v0(void)
+{
+#ifdef IPT_OWNER_COMM
+ printf(
+"owner match 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"
+"[!] --cmd-owner name Match local command name\n"
+"NOTE: PID, SID and command matching are broken on SMP\n"
+"\n");
+#else
+ printf(
+"owner match 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"
+"NOTE: PID and SID matching are broken on SMP\n"
+"\n");
+#endif /* IPT_OWNER_COMM */
+}
+
+static void owner_mt6_help_v0(void)
+{
+ printf(
+"owner match 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"
+"NOTE: PID and SID matching are broken on SMP\n"
+"\n");
+}
+
+static void owner_mt_help(void)
+{
+ printf(
+"owner match options:\n"
+"[!] --uid-owner userid Match local UID\n"
+"[!] --gid-owner groupid Match local GID\n"
+"[!] --socket-exists Match if socket exists\n"
+"\n");
+}
+
+static const struct option owner_mt_opts_v0[] = {
+ {.name = "uid-owner", .has_arg = true, .val = 'u'},
+ {.name = "gid-owner", .has_arg = true, .val = 'g'},
+ {.name = "pid-owner", .has_arg = true, .val = 'p'},
+ {.name = "sid-owner", .has_arg = true, .val = 's'},
+#ifdef IPT_OWNER_COMM
+ {.name = "cmd-owner", .has_arg = true, .val = 'c'},
+#endif
+ {},
+};
+
+static const struct option owner_mt6_opts_v0[] = {
+ {.name = "uid-owner", .has_arg = true, .val = 'u'},
+ {.name = "gid-owner", .has_arg = true, .val = 'g'},
+ {.name = "pid-owner", .has_arg = true, .val = 'p'},
+ {.name = "sid-owner", .has_arg = true, .val = 's'},
+ {},
+};
+
+static const struct option owner_mt_opts[] = {
+ {.name = "uid-owner", .has_arg = true, .val = 'u'},
+ {.name = "gid-owner", .has_arg = true, .val = 'g'},
+ {.name = "socket-exists", .has_arg = false, .val = 'k'},
+ {},
+};
+
+static int
+owner_mt_parse_v0(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct ipt_owner_info *info = (void *)(*match)->data;
+ struct passwd *pwd;
+ struct group *grp;
+ unsigned int id;
+
+ switch (c) {
+ case 'u':
+ param_act(P_ONLY_ONCE, "owner", "--uid-owner", *flags & FLAG_UID_OWNER);
+ if ((pwd = getpwnam(optarg)) != NULL)
+ id = pwd->pw_uid;
+ else if (!strtonum(optarg, NULL, &id, 0, ~(uid_t)0))
+ param_act(P_BAD_VALUE, "owner", "--uid-owner", optarg);
+ if (invert)
+ info->invert |= IPT_OWNER_UID;
+ info->match |= IPT_OWNER_UID;
+ info->uid = id;
+ *flags |= FLAG_UID_OWNER;
+ return true;
+
+ case 'g':
+ param_act(P_ONLY_ONCE, "owner", "--gid-owner", *flags & FLAG_GID_OWNER);
+ if ((grp = getgrnam(optarg)) != NULL)
+ id = grp->gr_gid;
+ else if (!strtonum(optarg, NULL, &id, 0, ~(gid_t)0))
+ param_act(P_BAD_VALUE, "owner", "--gid-owner", optarg);
+ if (invert)
+ info->invert |= IPT_OWNER_GID;
+ info->match |= IPT_OWNER_GID;
+ info->gid = id;
+ *flags |= FLAG_GID_OWNER;
+ return true;
+
+ case 'p':
+ param_act(P_ONLY_ONCE, "owner", "--pid-owner", *flags & FLAG_PID_OWNER);
+ if (!strtonum(optarg, NULL, &id, 0, INT_MAX))
+ param_act(P_BAD_VALUE, "owner", "--pid-owner", optarg);
+ if (invert)
+ info->invert |= IPT_OWNER_PID;
+ info->match |= IPT_OWNER_PID;
+ info->pid = id;
+ *flags |= FLAG_PID_OWNER;
+ return true;
+
+ case 's':
+ param_act(P_ONLY_ONCE, "owner", "--sid-owner", *flags & FLAG_SID_OWNER);
+ if (!strtonum(optarg, NULL, &id, 0, INT_MAX))
+ param_act(P_BAD_VALUE, "owner", "--sid-value", optarg);
+ if (invert)
+ info->invert |= IPT_OWNER_SID;
+ info->match |= IPT_OWNER_SID;
+ info->sid = id;
+ *flags |= FLAG_SID_OWNER;
+ return true;
+
+#ifdef IPT_OWNER_COMM
+ case 'c':
+ param_act(P_ONLY_ONCE, "owner", "--cmd-owner", *flags & FLAG_COMM);
+ if (strlen(optarg) > sizeof(info->comm))
+ exit_error(PARAMETER_PROBLEM, "owner match: command "
+ "\"%s\" too long, max. %zu characters",
+ optarg, sizeof(info->comm));
+
+ info->comm[sizeof(info->comm)-1] = '\0';
+ strncpy(info->comm, optarg, sizeof(info->comm));
+
+ if (invert)
+ info->invert |= IPT_OWNER_COMM;
+ info->match |= IPT_OWNER_COMM;
+ *flags |= FLAG_COMM;
+ return true;
+#endif
+ }
+ return false;
+}
+
+static int
+owner_mt6_parse_v0(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct ip6t_owner_info *info = (void *)(*match)->data;
+ struct passwd *pwd;
+ struct group *grp;
+ unsigned int id;
+
+ switch (c) {
+ case 'u':
+ param_act(P_ONLY_ONCE, "owner", "--uid-owner",
+ *flags & FLAG_UID_OWNER);
+ if ((pwd = getpwnam(optarg)) != NULL)
+ id = pwd->pw_uid;
+ else if (!strtonum(optarg, NULL, &id, 0, ~(uid_t)0))
+ param_act(P_BAD_VALUE, "owner", "--uid-owner", optarg);
+ if (invert)
+ info->invert |= IP6T_OWNER_UID;
+ info->match |= IP6T_OWNER_UID;
+ info->uid = id;
+ *flags |= FLAG_UID_OWNER;
+ return true;
+
+ case 'g':
+ param_act(P_ONLY_ONCE, "owner", "--gid-owner",
+ *flags & FLAG_GID_OWNER);
+ if ((grp = getgrnam(optarg)) != NULL)
+ id = grp->gr_gid;
+ else if (!strtonum(optarg, NULL, &id, 0, ~(gid_t)0))
+ param_act(P_BAD_VALUE, "owner", "--gid-owner", optarg);
+ if (invert)
+ info->invert |= IP6T_OWNER_GID;
+ info->match |= IP6T_OWNER_GID;
+ info->gid = id;
+ *flags |= FLAG_GID_OWNER;
+ return true;
+
+ case 'p':
+ param_act(P_ONLY_ONCE, "owner", "--pid-owner",
+ *flags & FLAG_PID_OWNER);
+ if (!strtonum(optarg, NULL, &id, 0, INT_MAX))
+ param_act(P_BAD_VALUE, "owner", "--pid-owner", optarg);
+ if (invert)
+ info->invert |= IP6T_OWNER_PID;
+ info->match |= IP6T_OWNER_PID;
+ info->pid = id;
+ *flags |= FLAG_PID_OWNER;
+ return true;
+
+ case 's':
+ param_act(P_ONLY_ONCE, "owner", "--sid-owner",
+ *flags & FLAG_SID_OWNER);
+ if (!strtonum(optarg, NULL, &id, 0, INT_MAX))
+ param_act(P_BAD_VALUE, "owner", "--sid-owner", optarg);
+ if (invert)
+ info->invert |= IP6T_OWNER_SID;
+ info->match |= IP6T_OWNER_SID;
+ info->sid = id;
+ *flags |= FLAG_SID_OWNER;
+ return true;
+ }
+ return false;
+}
+
+static int owner_mt_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_owner_match_info *info = (void *)(*match)->data;
+ struct passwd *pwd;
+ struct group *grp;
+ unsigned int id;
+
+ switch (c) {
+ case 'u':
+ param_act(P_ONLY_ONCE, "owner", "--uid-owner",
+ *flags & FLAG_UID_OWNER);
+ if ((pwd = getpwnam(optarg)) != NULL)
+ id = pwd->pw_uid;
+ else if (!strtonum(optarg, NULL, &id, 0, ~(uid_t)0))
+ param_act(P_BAD_VALUE, "owner", "--uid-owner", optarg);
+ if (invert)
+ info->invert |= XT_OWNER_UID;
+ info->match |= XT_OWNER_UID;
+ info->uid = id;
+ *flags |= FLAG_UID_OWNER;
+ return true;
+
+ case 'g':
+ param_act(P_ONLY_ONCE, "owner", "--gid-owner",
+ *flags & FLAG_GID_OWNER);
+ if ((grp = getgrnam(optarg)) != NULL)
+ id = grp->gr_gid;
+ else if (!strtonum(optarg, NULL, &id, 0, ~(gid_t)0))
+ param_act(P_BAD_VALUE, "owner", "--gid-owner", optarg);
+ if (invert)
+ info->invert |= XT_OWNER_GID;
+ info->match |= XT_OWNER_GID;
+ info->gid = id;
+ *flags |= FLAG_GID_OWNER;
+ return true;
+
+ case 'k':
+ param_act(P_ONLY_ONCE, "owner", "--socket-exists",
+ *flags & FLAG_SOCKET_EXISTS);
+ if (invert)
+ info->invert |= XT_OWNER_SOCKET;
+ info->match |= XT_OWNER_SOCKET;
+ *flags |= FLAG_SOCKET_EXISTS;
+ return true;
+
+ }
+ return false;
+}
+
+static void owner_mt_check(unsigned int flags)
+{
+ if (flags == 0)
+ exit_error(PARAMETER_PROBLEM, "owner: At least one of "
+ "--uid-owner, --gid-owner or --socket-exists "
+ "is required");
+}
+
+static void
+owner_mt_print_item_v0(const struct ipt_owner_info *info, const char *label,
+ u_int8_t flag, bool numeric)
+{
+ if (!(info->match & flag))
+ return;
+ if (info->invert & flag)
+ printf("! ");
+ printf(label);
+
+ switch (info->match & flag) {
+ case IPT_OWNER_UID:
+ if (!numeric) {
+ struct passwd *pwd = getpwuid(info->uid);
+
+ if (pwd != NULL && pwd->pw_name != NULL) {
+ printf("%s ", pwd->pw_name);
+ break;
+ }
+ }
+ printf("%u ", (unsigned int)info->uid);
+ break;
+
+ case IPT_OWNER_GID:
+ if (!numeric) {
+ struct group *grp = getgrgid(info->gid);
+
+ if (grp != NULL && grp->gr_name != NULL) {
+ printf("%s ", grp->gr_name);
+ break;
+ }
+ }
+ printf("%u ", (unsigned int)info->gid);
+ break;
+
+ case IPT_OWNER_PID:
+ printf("%u ", (unsigned int)info->pid);
+ break;
+
+ case IPT_OWNER_SID:
+ printf("%u ", (unsigned int)info->sid);
+ break;
+
+#ifdef IPT_OWNER_COMM
+ case IPT_OWNER_COMM:
+ printf("%.*s ", (int)sizeof(info->comm), info->comm);
+ break;
+#endif
+ }
+}
+
+static void
+owner_mt6_print_item_v0(const struct ip6t_owner_info *info, const char *label,
+ u_int8_t flag, bool numeric)
+{
+ if (!(info->match & flag))
+ return;
+ if (info->invert & flag)
+ printf("! ");
+ printf(label);
+
+ switch (info->match & flag) {
+ case IP6T_OWNER_UID:
+ if (!numeric) {
+ struct passwd *pwd = getpwuid(info->uid);
+
+ if (pwd != NULL && pwd->pw_name != NULL) {
+ printf("%s ", pwd->pw_name);
+ break;
+ }
+ }
+ printf("%u ", (unsigned int)info->uid);
+ break;
+
+ case IP6T_OWNER_GID:
+ if (!numeric) {
+ struct group *grp = getgrgid(info->gid);
+
+ if (grp != NULL && grp->gr_name != NULL) {
+ printf("%s ", grp->gr_name);
+ break;
+ }
+ }
+ printf("%u ", (unsigned int)info->gid);
+ break;
+
+ case IP6T_OWNER_PID:
+ printf("%u ", (unsigned int)info->pid);
+ break;
+
+ case IP6T_OWNER_SID:
+ printf("%u ", (unsigned int)info->sid);
+ break;
+ }
+}
+
+static void
+owner_mt_print_item(const struct xt_owner_match_info *info, const char *label,
+ u_int8_t flag, bool numeric)
+{
+ if (!(info->match & flag))
+ return;
+ if (info->invert & flag)
+ printf("! ");
+ printf(label);
+
+ switch (info->match & flag) {
+ case XT_OWNER_UID:
+ if (!numeric) {
+ const struct passwd *pwd = getpwuid(info->uid);
+
+ if (pwd != NULL && pwd->pw_name != NULL) {
+ printf("%s ", pwd->pw_name);
+ break;
+ }
+ }
+ printf("%u ", (unsigned int)info->uid);
+ break;
+
+ case XT_OWNER_GID:
+ if (!numeric) {
+ const struct group *grp = getgrgid(info->gid);
+
+ if (grp != NULL && grp->gr_name != NULL) {
+ printf("%s ", grp->gr_name);
+ break;
+ }
+ }
+ printf("%u ", (unsigned int)info->gid);
+ break;
+ }
+}
+
+static void
+owner_mt_print_v0(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct ipt_owner_info *info = (void *)match->data;
+
+ owner_mt_print_item_v0(info, "owner UID match ", IPT_OWNER_UID, numeric);
+ owner_mt_print_item_v0(info, "owner GID match ", IPT_OWNER_GID, numeric);
+ owner_mt_print_item_v0(info, "owner PID match ", IPT_OWNER_PID, numeric);
+ owner_mt_print_item_v0(info, "owner SID match ", IPT_OWNER_SID, numeric);
+#ifdef IPT_OWNER_COMM
+ owner_mt_print_item_v0(info, "owner CMD match ", IPT_OWNER_COMM, numeric);
+#endif
+}
+
+static void
+owner_mt6_print_v0(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct ip6t_owner_info *info = (void *)match->data;
+
+ owner_mt6_print_item_v0(info, "owner UID match ", IPT_OWNER_UID, numeric);
+ owner_mt6_print_item_v0(info, "owner GID match ", IPT_OWNER_GID, numeric);
+ owner_mt6_print_item_v0(info, "owner PID match ", IPT_OWNER_PID, numeric);
+ owner_mt6_print_item_v0(info, "owner SID match ", IPT_OWNER_SID, numeric);
+}
+
+static void owner_mt_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct xt_owner_match_info *info = (void *)match->data;
+
+ owner_mt_print_item(info, "owner socket exists ", XT_OWNER_SOCKET, numeric);
+ owner_mt_print_item(info, "owner UID match ", XT_OWNER_UID, numeric);
+ owner_mt_print_item(info, "owner GID match ", XT_OWNER_GID, numeric);
+}
+
+static void
+owner_mt_save_v0(const void *ip, const struct xt_entry_match *match)
+{
+ const struct ipt_owner_info *info = (void *)match->data;
+
+ owner_mt_print_item_v0(info, "owner UID match ", IPT_OWNER_UID, true);
+ owner_mt_print_item_v0(info, "owner GID match ", IPT_OWNER_GID, true);
+ owner_mt_print_item_v0(info, "owner PID match ", IPT_OWNER_PID, true);
+ owner_mt_print_item_v0(info, "owner SID match ", IPT_OWNER_SID, true);
+#ifdef IPT_OWNER_COMM
+ owner_mt_print_item_v0(info, "owner CMD match ", IPT_OWNER_COMM, true);
+#endif
+}
+
+static void
+owner_mt6_save_v0(const void *ip, const struct xt_entry_match *match)
+{
+ const struct ip6t_owner_info *info = (void *)match->data;
+
+ owner_mt6_print_item_v0(info, "owner UID match ", IPT_OWNER_UID, true);
+ owner_mt6_print_item_v0(info, "owner GID match ", IPT_OWNER_GID, true);
+ owner_mt6_print_item_v0(info, "owner PID match ", IPT_OWNER_PID, true);
+ owner_mt6_print_item_v0(info, "owner SID match ", IPT_OWNER_SID, true);
+}
+
+static void owner_mt_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_owner_match_info *info = (void *)match->data;
+
+ owner_mt_print_item(info, "--socket-exists ", XT_OWNER_SOCKET, false);
+ owner_mt_print_item(info, "--uid-owner", XT_OWNER_UID, false);
+ owner_mt_print_item(info, "--gid-owner", XT_OWNER_GID, false);
+}
+
+static struct xtables_match owner_mt_reg_v0 = {
+ .version = IPTABLES_VERSION,
+ .name = "owner",
+ .revision = 0,
+ .family = AF_INET,
+ .size = XT_ALIGN(sizeof(struct ipt_owner_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct ipt_owner_info)),
+ .help = owner_mt_help_v0,
+ .parse = owner_mt_parse_v0,
+ .final_check = owner_mt_check,
+ .print = owner_mt_print_v0,
+ .save = owner_mt_save_v0,
+ .extra_opts = owner_mt_opts_v0,
+};
+
+static struct xtables_match owner_mt6_reg_v0 = {
+ .version = IPTABLES_VERSION,
+ .name = "owner",
+ .revision = 0,
+ .family = AF_INET6,
+ .size = XT_ALIGN(sizeof(struct ip6t_owner_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct ip6t_owner_info)),
+ .help = owner_mt6_help_v0,
+ .parse = owner_mt6_parse_v0,
+ .final_check = owner_mt_check,
+ .print = owner_mt6_print_v0,
+ .save = owner_mt6_save_v0,
+ .extra_opts = owner_mt6_opts_v0,
+};
+
+static struct xtables_match owner_mt_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "owner",
+ .revision = 1,
+ .family = AF_INET,
+ .size = XT_ALIGN(sizeof(struct xt_owner_match_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_owner_match_info)),
+ .help = owner_mt_help,
+ .parse = owner_mt_parse,
+ .final_check = owner_mt_check,
+ .print = owner_mt_print,
+ .save = owner_mt_save,
+ .extra_opts = owner_mt_opts,
+};
+
+static struct xtables_match owner_mt6_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "owner",
+ .revision = 1,
+ .family = AF_INET6,
+ .size = XT_ALIGN(sizeof(struct xt_owner_match_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_owner_match_info)),
+ .help = owner_mt_help,
+ .parse = owner_mt_parse,
+ .final_check = owner_mt_check,
+ .print = owner_mt_print,
+ .save = owner_mt_save,
+ .extra_opts = owner_mt_opts,
+};
+
+void _init(void)
+{
+ xtables_register_match(&owner_mt_reg_v0);
+ xtables_register_match(&owner_mt6_reg_v0);
+ xtables_register_match(&owner_mt_reg);
+ xtables_register_match(&owner_mt6_reg);
+}
Index: iptables-modules/extensions/libxt_owner.man
===================================================================
--- /dev/null
+++ iptables-modules/extensions/libxt_owner.man
@@ -0,0 +1,16 @@
+This module attempts to match various characteristics of the packet creator,
+for locally generated packets. This match is only valid in the OUTPUT and
+POSTROUTING chains. Forwarded packets do not have any socket associated with
+them. Packets from kernel threads do have a socket, but usually no owner.
+.TP
+\fB--uid-owner\fR \fIuserid\fR
+Matches if the packet socket's file structure (if it has one) is owned by the
+given user ID. A user name may be specified in place of \fIuserid\fR, in which
+case iptables will try to look it up.
+.TP
+\fB--gid-owner\fR \fIgroupid\fR
+Matches if the packet socket's file structure is owned by the given group ID.
+A group name may be specified in place of \fIgroupid\fR.
+.TP
+\fB--socket-exists\fR
+Matches if the packet is associated with a socket.
Index: iptables-modules/include/linux/netfilter/xt_owner.h
===================================================================
--- /dev/null
+++ iptables-modules/include/linux/netfilter/xt_owner.h
@@ -0,0 +1,16 @@
+#ifndef _XT_OWNER_MATCH_H
+#define _XT_OWNER_MATCH_H
+
+enum {
+ XT_OWNER_UID = 1 << 0,
+ XT_OWNER_GID = 1 << 1,
+ XT_OWNER_SOCKET = 1 << 2,
+};
+
+struct xt_owner_match_info {
+ u_int32_t uid;
+ u_int32_t gid;
+ u_int8_t match, invert;
+};
+
+#endif /* _XT_OWNER_MATCH_H */
-
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