Adding upstream version 6.1.0.upstream/6.1.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 406 insertions, 0 deletions

diff --git a/include/libiptc/ipt_kernel_headers.h b/include/libiptc/ipt_kernel_headers.h
new file mode 100644
index 0000000..3d2a2a3
--- /dev/null
+++ b/include/libiptc/ipt_kernel_headers.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* This is the userspace/kernel interface for Generic IP Chains,
+   required for libc6. */
+#ifndef _FWCHAINS_KERNEL_HEADERS_H
+#define _FWCHAINS_KERNEL_HEADERS_H
+
+#include <limits.h>
+
+#include <netinet/ip.h>
+#include <netinet/in.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <net/if.h>
+#include <sys/types.h>
+#endif
diff --git a/include/libiptc/libip6tc.h b/include/libiptc/libip6tc.h
new file mode 100644
index 0000000..cd588de
--- /dev/null
+++ b/include/libiptc/libip6tc.h
@@ -0,0 +1,162 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LIBIP6TC_H
+#define _LIBIP6TC_H
+/* Library which manipulates firewall rules. Version 0.2. */
+
+#include <linux/types.h>
+#include <libiptc/ipt_kernel_headers.h>
+#ifdef __cplusplus
+#	include <climits>
+#else
+#	include <limits.h> /* INT_MAX in ip6_tables.h */
+#endif
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <libiptc/xtcshared.h>
+
+#define ip6tc_handle xtc_handle
+#define ip6t_chainlabel xt_chainlabel
+
+#define IP6TC_LABEL_ACCEPT "ACCEPT"
+#define IP6TC_LABEL_DROP "DROP"
+#define IP6TC_LABEL_QUEUE   "QUEUE"
+#define IP6TC_LABEL_RETURN "RETURN"
+
+/* Does this chain exist? */
+int ip6tc_is_chain(const char *chain, struct xtc_handle *const handle);
+
+/* Take a snapshot of the rules. Returns NULL on error. */
+struct xtc_handle *ip6tc_init(const char *tablename);
+
+/* Cleanup after ip6tc_init(). */
+void ip6tc_free(struct xtc_handle *h);
+
+/* Iterator functions to run through the chains.  Returns NULL at end. */
+const char *ip6tc_first_chain(struct xtc_handle *handle);
+const char *ip6tc_next_chain(struct xtc_handle *handle);
+
+/* Get first rule in the given chain: NULL for empty chain. */
+const struct ip6t_entry *ip6tc_first_rule(const char *chain,
+					  struct xtc_handle *handle);
+
+/* Returns NULL when rules run out. */
+const struct ip6t_entry *ip6tc_next_rule(const struct ip6t_entry *prev,
+					 struct xtc_handle *handle);
+
+/* Returns a pointer to the target name of this position. */
+const char *ip6tc_get_target(const struct ip6t_entry *e,
+			     struct xtc_handle *handle);
+
+/* Is this a built-in chain? */
+int ip6tc_builtin(const char *chain, struct xtc_handle *const handle);
+
+/* Get the policy of a given built-in chain */
+const char *ip6tc_get_policy(const char *chain,
+			     struct xt_counters *counters,
+			     struct xtc_handle *handle);
+
+/* These functions return TRUE for OK or 0 and set errno. If errno ==
+   0, it means there was a version error (ie. upgrade libiptc). */
+/* Rule numbers start at 1 for the first rule. */
+
+/* Insert the entry `fw' in chain `chain' into position `rulenum'. */
+int ip6tc_insert_entry(const xt_chainlabel chain,
+		       const struct ip6t_entry *e,
+		       unsigned int rulenum,
+		       struct xtc_handle *handle);
+
+/* Atomically replace rule `rulenum' in `chain' with `fw'. */
+int ip6tc_replace_entry(const xt_chainlabel chain,
+			const struct ip6t_entry *e,
+			unsigned int rulenum,
+			struct xtc_handle *handle);
+
+/* Append entry `fw' to chain `chain'. Equivalent to insert with
+   rulenum = length of chain. */
+int ip6tc_append_entry(const xt_chainlabel chain,
+		       const struct ip6t_entry *e,
+		       struct xtc_handle *handle);
+
+/* Check whether a matching rule exists */
+int ip6tc_check_entry(const xt_chainlabel chain,
+		       const struct ip6t_entry *origfw,
+		       unsigned char *matchmask,
+		       struct xtc_handle *handle);
+
+/* Delete the first rule in `chain' which matches `fw'. */
+int ip6tc_delete_entry(const xt_chainlabel chain,
+		       const struct ip6t_entry *origfw,
+		       unsigned char *matchmask,
+		       struct xtc_handle *handle);
+
+/* Delete the rule in position `rulenum' in `chain'. */
+int ip6tc_delete_num_entry(const xt_chainlabel chain,
+			   unsigned int rulenum,
+			   struct xtc_handle *handle);
+
+/* Check the packet `fw' on chain `chain'. Returns the verdict, or
+   NULL and sets errno. */
+const char *ip6tc_check_packet(const xt_chainlabel chain,
+			       struct ip6t_entry *,
+			       struct xtc_handle *handle);
+
+/* Flushes the entries in the given chain (ie. empties chain). */
+int ip6tc_flush_entries(const xt_chainlabel chain,
+			struct xtc_handle *handle);
+
+/* Zeroes the counters in a chain. */
+int ip6tc_zero_entries(const xt_chainlabel chain,
+		       struct xtc_handle *handle);
+
+/* Creates a new chain. */
+int ip6tc_create_chain(const xt_chainlabel chain,
+		       struct xtc_handle *handle);
+
+/* Deletes a chain. */
+int ip6tc_delete_chain(const xt_chainlabel chain,
+		       struct xtc_handle *handle);
+
+/* Renames a chain. */
+int ip6tc_rename_chain(const xt_chainlabel oldname,
+		       const xt_chainlabel newname,
+		       struct xtc_handle *handle);
+
+/* Sets the policy on a built-in chain. */
+int ip6tc_set_policy(const xt_chainlabel chain,
+		     const xt_chainlabel policy,
+		     struct xt_counters *counters,
+		     struct xtc_handle *handle);
+
+/* Get the number of references to this chain */
+int ip6tc_get_references(unsigned int *ref, const xt_chainlabel chain,
+			 struct xtc_handle *handle);
+
+/* read packet and byte counters for a specific rule */
+struct xt_counters *ip6tc_read_counter(const xt_chainlabel chain,
+					unsigned int rulenum,
+					struct xtc_handle *handle);
+
+/* zero packet and byte counters for a specific rule */
+int ip6tc_zero_counter(const xt_chainlabel chain,
+		       unsigned int rulenum,
+		       struct xtc_handle *handle);
+
+/* set packet and byte counters for a specific rule */
+int ip6tc_set_counter(const xt_chainlabel chain,
+		      unsigned int rulenum,
+		      struct xt_counters *counters,
+		      struct xtc_handle *handle);
+
+/* Makes the actual changes. */
+int ip6tc_commit(struct xtc_handle *handle);
+
+/* Get raw socket. */
+int ip6tc_get_raw_socket(void);
+
+/* Translates errno numbers into more human-readable form than strerror. */
+const char *ip6tc_strerror(int err);
+
+extern void dump_entries6(struct xtc_handle *const);
+
+extern const struct xtc_ops ip6tc_ops;
+
+#endif /* _LIBIP6TC_H */
diff --git a/include/libiptc/libiptc.h b/include/libiptc/libiptc.h
new file mode 100644
index 0000000..1bfe4e1
--- /dev/null
+++ b/include/libiptc/libiptc.h
@@ -0,0 +1,173 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LIBIPTC_H
+#define _LIBIPTC_H
+/* Library which manipulates filtering rules. */
+
+#include <linux/types.h>
+#include <libiptc/ipt_kernel_headers.h>
+#ifdef __cplusplus
+#	include <climits>
+#else
+#	include <limits.h> /* INT_MAX in ip_tables.h */
+#endif
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <libiptc/xtcshared.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define iptc_handle xtc_handle
+#define ipt_chainlabel xt_chainlabel
+
+#define IPTC_LABEL_ACCEPT  "ACCEPT"
+#define IPTC_LABEL_DROP    "DROP"
+#define IPTC_LABEL_QUEUE   "QUEUE"
+#define IPTC_LABEL_RETURN  "RETURN"
+
+/* Does this chain exist? */
+int iptc_is_chain(const char *chain, struct xtc_handle *const handle);
+
+/* Take a snapshot of the rules.  Returns NULL on error. */
+struct xtc_handle *iptc_init(const char *tablename);
+
+/* Cleanup after iptc_init(). */
+void iptc_free(struct xtc_handle *h);
+
+/* Iterator functions to run through the chains.  Returns NULL at end. */
+const char *iptc_first_chain(struct xtc_handle *handle);
+const char *iptc_next_chain(struct xtc_handle *handle);
+
+/* Get first rule in the given chain: NULL for empty chain. */
+const struct ipt_entry *iptc_first_rule(const char *chain,
+					struct xtc_handle *handle);
+
+/* Returns NULL when rules run out. */
+const struct ipt_entry *iptc_next_rule(const struct ipt_entry *prev,
+				       struct xtc_handle *handle);
+
+/* Returns a pointer to the target name of this entry. */
+const char *iptc_get_target(const struct ipt_entry *e,
+			    struct xtc_handle *handle);
+
+/* Is this a built-in chain? */
+int iptc_builtin(const char *chain, struct xtc_handle *const handle);
+
+/* Get the policy of a given built-in chain */
+const char *iptc_get_policy(const char *chain,
+			    struct xt_counters *counter,
+			    struct xtc_handle *handle);
+
+/* These functions return TRUE for OK or 0 and set errno.  If errno ==
+   0, it means there was a version error (ie. upgrade libiptc). */
+/* Rule numbers start at 1 for the first rule. */
+
+/* Insert the entry `e' in chain `chain' into position `rulenum'. */
+int iptc_insert_entry(const xt_chainlabel chain,
+		      const struct ipt_entry *e,
+		      unsigned int rulenum,
+		      struct xtc_handle *handle);
+
+/* Atomically replace rule `rulenum' in `chain' with `e'. */
+int iptc_replace_entry(const xt_chainlabel chain,
+		       const struct ipt_entry *e,
+		       unsigned int rulenum,
+		       struct xtc_handle *handle);
+
+/* Append entry `e' to chain `chain'.  Equivalent to insert with
+   rulenum = length of chain. */
+int iptc_append_entry(const xt_chainlabel chain,
+		      const struct ipt_entry *e,
+		      struct xtc_handle *handle);
+
+/* Check whether a mathching rule exists */
+int iptc_check_entry(const xt_chainlabel chain,
+		      const struct ipt_entry *origfw,
+		      unsigned char *matchmask,
+		      struct xtc_handle *handle);
+
+/* Delete the first rule in `chain' which matches `e', subject to
+   matchmask (array of length == origfw) */
+int iptc_delete_entry(const xt_chainlabel chain,
+		      const struct ipt_entry *origfw,
+		      unsigned char *matchmask,
+		      struct xtc_handle *handle);
+
+/* Delete the rule in position `rulenum' in `chain'. */
+int iptc_delete_num_entry(const xt_chainlabel chain,
+			  unsigned int rulenum,
+			  struct xtc_handle *handle);
+
+/* Check the packet `e' on chain `chain'.  Returns the verdict, or
+   NULL and sets errno. */
+const char *iptc_check_packet(const xt_chainlabel chain,
+			      struct ipt_entry *entry,
+			      struct xtc_handle *handle);
+
+/* Flushes the entries in the given chain (ie. empties chain). */
+int iptc_flush_entries(const xt_chainlabel chain,
+		       struct xtc_handle *handle);
+
+/* Zeroes the counters in a chain. */
+int iptc_zero_entries(const xt_chainlabel chain,
+		      struct xtc_handle *handle);
+
+/* Creates a new chain. */
+int iptc_create_chain(const xt_chainlabel chain,
+		      struct xtc_handle *handle);
+
+/* Deletes a chain. */
+int iptc_delete_chain(const xt_chainlabel chain,
+		      struct xtc_handle *handle);
+
+/* Renames a chain. */
+int iptc_rename_chain(const xt_chainlabel oldname,
+		      const xt_chainlabel newname,
+		      struct xtc_handle *handle);
+
+/* Sets the policy on a built-in chain. */
+int iptc_set_policy(const xt_chainlabel chain,
+		    const xt_chainlabel policy,
+		    struct xt_counters *counters,
+		    struct xtc_handle *handle);
+
+/* Get the number of references to this chain */
+int iptc_get_references(unsigned int *ref,
+			const xt_chainlabel chain,
+			struct xtc_handle *handle);
+
+/* read packet and byte counters for a specific rule */
+struct xt_counters *iptc_read_counter(const xt_chainlabel chain,
+				       unsigned int rulenum,
+				       struct xtc_handle *handle);
+
+/* zero packet and byte counters for a specific rule */
+int iptc_zero_counter(const xt_chainlabel chain,
+		      unsigned int rulenum,
+		      struct xtc_handle *handle);
+
+/* set packet and byte counters for a specific rule */
+int iptc_set_counter(const xt_chainlabel chain,
+		     unsigned int rulenum,
+		     struct xt_counters *counters,
+		     struct xtc_handle *handle);
+
+/* Makes the actual changes. */
+int iptc_commit(struct xtc_handle *handle);
+
+/* Get raw socket. */
+int iptc_get_raw_socket(void);
+
+/* Translates errno numbers into more human-readable form than strerror. */
+const char *iptc_strerror(int err);
+
+extern void dump_entries(struct xtc_handle *const);
+
+extern const struct xtc_ops iptc_ops;
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _LIBIPTC_H */
diff --git a/include/libiptc/libxtc.h b/include/libiptc/libxtc.h
new file mode 100644
index 0000000..1e9596a
--- /dev/null
+++ b/include/libiptc/libxtc.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LIBXTC_H
+#define _LIBXTC_H
+/* Library which manipulates filtering rules. */
+
+#include <libiptc/ipt_kernel_headers.h>
+#include <linux/netfilter/x_tables.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef XT_MIN_ALIGN
+/* xt_entry has pointers and u_int64_t's in it, so if you align to
+   it, you'll also align to any crazy matches and targets someone
+   might write */
+#define XT_MIN_ALIGN (__alignof__(struct xt_entry))
+#endif
+
+#ifndef XT_ALIGN
+#define XT_ALIGN(s) (((s) + ((XT_MIN_ALIGN)-1)) & ~((XT_MIN_ALIGN)-1))
+#endif
+
+#define XTC_LABEL_ACCEPT  "ACCEPT"
+#define XTC_LABEL_DROP    "DROP"
+#define XTC_LABEL_QUEUE   "QUEUE"
+#define XTC_LABEL_RETURN  "RETURN"
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LIBXTC_H */
diff --git a/include/libiptc/xtcshared.h b/include/libiptc/xtcshared.h
new file mode 100644
index 0000000..278a58f
--- /dev/null
+++ b/include/libiptc/xtcshared.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LIBXTC_SHARED_H
+#define _LIBXTC_SHARED_H 1
+
+typedef char xt_chainlabel[32];
+struct xtc_handle;
+struct xt_counters;
+
+struct xtc_ops {
+	int (*commit)(struct xtc_handle *);
+	void (*free)(struct xtc_handle *);
+	int (*builtin)(const char *, struct xtc_handle *const);
+	int (*is_chain)(const char *, struct xtc_handle *const);
+	int (*flush_entries)(const xt_chainlabel, struct xtc_handle *);
+	int (*create_chain)(const xt_chainlabel, struct xtc_handle *);
+	int (*set_policy)(const xt_chainlabel, const xt_chainlabel,
+			  struct xt_counters *, struct xtc_handle *);
+	const char *(*strerror)(int);
+};
+
+#endif /* _LIBXTC_SHARED_H */