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authorMarc Boucher <marc@mbsi.ca>2000-03-20 06:03:29 +0000
committerMarc Boucher <marc@mbsi.ca>2000-03-20 06:03:29 +0000
commite6869a8f59d779ff4d5a0984c86d80db70784962 (patch)
treecbaf2a4e3f8249de3967b959a214c27ff5fdee2a /include
reorganized tree after kernel merge
Diffstat (limited to 'include')
-rw-r--r--include/iptables.h122
-rw-r--r--include/libipq/libipq.h77
-rw-r--r--include/libiptc/ipt_kernel_headers.h22
-rw-r--r--include/libiptc/libiptc.h131
4 files changed, 352 insertions, 0 deletions
diff --git a/include/iptables.h b/include/iptables.h
new file mode 100644
index 00000000..9b1a4a16
--- /dev/null
+++ b/include/iptables.h
@@ -0,0 +1,122 @@
+#ifndef _IPTABLES_USER_H
+#define _IPTABLES_USER_H
+
+#include "libiptc/libiptc.h"
+
+/* Include file for additions: new matches and targets. */
+struct iptables_match
+{
+ struct iptables_match *next;
+
+ ipt_chainlabel name;
+
+ const char *version;
+
+ /* Size of match data. */
+ size_t size;
+
+ /* Function which prints out usage message. */
+ void (*help)(void);
+
+ /* Initialize the match. */
+ void (*init)(struct ipt_entry_match *m, unsigned int *nfcache);
+
+ /* Function which parses command options; returns true if it
+ ate an option */
+ int (*parse)(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ unsigned int *nfcache,
+ struct ipt_entry_match **match);
+
+ /* Final check; exit if not ok. */
+ void (*final_check)(unsigned int flags);
+
+ /* Prints out the match iff non-NULL: put space at end */
+ void (*print)(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match, int numeric);
+
+ /* Saves the union ipt_matchinfo in parsable form to stdout. */
+ void (*save)(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match);
+
+ /* Pointer to list of extra command-line options */
+ struct option *extra_opts;
+
+ /* Ignore these men behind the curtain: */
+ unsigned int option_offset;
+ struct ipt_entry_match *m;
+ unsigned int mflags;
+};
+
+struct iptables_target
+{
+ struct iptables_target *next;
+
+ ipt_chainlabel name;
+
+ const char *version;
+
+ /* Size of target data. */
+ size_t size;
+
+ /* Function which prints out usage message. */
+ void (*help)(void);
+
+ /* Initialize the target. */
+ void (*init)(struct ipt_entry_target *t, unsigned int *nfcache);
+
+ /* Function which parses command options; returns true if it
+ ate an option */
+ int (*parse)(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ struct ipt_entry_target **target);
+
+ /* Final check; exit if not ok. */
+ void (*final_check)(unsigned int flags);
+
+ /* Prints out the target iff non-NULL: put space at end */
+ void (*print)(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target, int numeric);
+
+ /* Saves the targinfo in parsable form to stdout. */
+ void (*save)(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target);
+
+ /* Pointer to list of extra command-line options */
+ struct option *extra_opts;
+
+ /* Ignore these men behind the curtain: */
+ unsigned int option_offset;
+ struct ipt_entry_target *t;
+ unsigned int tflags;
+};
+
+/* Your shared library should call one of these. */
+extern void register_match(struct iptables_match *me);
+extern void register_target(struct iptables_target *me);
+
+/* Functions we share */
+enum exittype {
+ OTHER_PROBLEM = 1,
+ PARAMETER_PROBLEM,
+ VERSION_PROBLEM
+};
+extern void exit_printhelp() __attribute__((noreturn));
+extern void exit_tryhelp(int) __attribute__((noreturn));
+int check_inverse(const char option[], int *invert);
+extern int string_to_number(const char *, int, int);
+void exit_error(enum exittype, char *, ...)__attribute__((noreturn,
+ format(printf,2,3)));
+extern char *addr_to_dotted(const struct in_addr *addrp);
+struct in_addr *dotted_to_addr(const char *dotted);
+extern const char *program_name, *program_version;
+
+extern int do_command(int argc, char *argv[], char **table,
+ iptc_handle_t *handle);
+/* Keeping track of external matches and targets: linked lists. */
+extern struct iptables_match *iptables_matches;
+extern struct iptables_target *iptables_targets;
+
+extern struct iptables_target *find_target(const char *name, int tryload);
+extern struct iptables_match *find_match(const char *name, int tryload);
+#endif /*_IPTABLES_USER_H*/
diff --git a/include/libipq/libipq.h b/include/libipq/libipq.h
new file mode 100644
index 00000000..bc51ec72
--- /dev/null
+++ b/include/libipq/libipq.h
@@ -0,0 +1,77 @@
+/*
+ * libipq.h
+ *
+ * IPQ library for userspace.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#ifndef _LIBIPQ_H
+#define _LIBIPQ_H
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <asm/types.h>
+#include <linux/netlink.h>
+
+#include <linux/netfilter_ipv4/ip_queue.h>
+
+#ifdef DEBUG_LIBIPQ
+#include <stdio.h>
+#define LDEBUG(x...) fprintf(stderr, ## x)
+#else
+#define LDEBUG(x...)
+#endif /* DEBUG_LIBIPQ */
+
+/* FIXME: glibc sucks */
+#ifndef MSG_TRUNC
+#define MSG_TRUNC 0x20
+#endif
+
+struct ipq_handle
+{
+ int fd;
+ u_int8_t blocking;
+ struct sockaddr_nl local;
+ struct sockaddr_nl peer;
+};
+
+struct ipq_handle *ipq_create_handle(u_int32_t flags);
+
+int ipq_destroy_handle(struct ipq_handle *h);
+
+ssize_t ipq_read(const struct ipq_handle *h,
+ unsigned char *buf, size_t len, int timeout);
+
+int ipq_set_mode(const struct ipq_handle *h, u_int8_t mode, size_t len);
+
+ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf);
+
+int ipq_message_type(const unsigned char *buf);
+
+int ipq_get_msgerr(const unsigned char *buf);
+
+int ipq_set_verdict(const struct ipq_handle *h,
+ unsigned long id,
+ unsigned int verdict,
+ size_t data_len,
+ unsigned char *buf);
+
+int ipq_ctl(const struct ipq_handle *h, int request, ...);
+
+void ipq_perror(const char *s);
+
+#endif /* _LIBIPQ_H */
+
diff --git a/include/libiptc/ipt_kernel_headers.h b/include/libiptc/ipt_kernel_headers.h
new file mode 100644
index 00000000..0fd848e9
--- /dev/null
+++ b/include/libiptc/ipt_kernel_headers.h
@@ -0,0 +1,22 @@
+/* This is the userspace/kernel interface for Generic IP Chains,
+ required for libc6. */
+#ifndef _FWCHAINS_KERNEL_HEADERS_H
+#define _FWCHAINS_KERNEL_HEADERS_H
+
+#if defined(__GLIBC__) && __GLIBC__ == 2
+#include <netinet/ip.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <net/if.h>
+#include <sys/types.h>
+#else /* libc5 */
+#include <sys/socket.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/if.h>
+#include <linux/icmp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#endif
+#endif
diff --git a/include/libiptc/libiptc.h b/include/libiptc/libiptc.h
new file mode 100644
index 00000000..4a964e03
--- /dev/null
+++ b/include/libiptc/libiptc.h
@@ -0,0 +1,131 @@
+#ifndef _LIBIPTC_H
+#define _LIBIPTC_H
+/* Library which manipulates filtering rules. */
+
+#include <libiptc/ipt_kernel_headers.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+#ifndef IPT_MIN_ALIGN
+#define IPT_MIN_ALIGN (__alignof__(struct ipt_entry_match))
+#endif
+#define IPT_ALIGN(s) (((s) + (IPT_MIN_ALIGN-1)) & ~(IPT_MIN_ALIGN-1))
+
+typedef char ipt_chainlabel[32];
+
+#define IPTC_LABEL_ACCEPT "ACCEPT"
+#define IPTC_LABEL_DROP "DROP"
+#define IPTC_LABEL_QUEUE "QUEUE"
+#define IPTC_LABEL_RETURN "RETURN"
+
+/* Transparent handle type. */
+typedef struct iptc_handle *iptc_handle_t;
+
+/* Does this chain exist? */
+int iptc_is_chain(const char *chain, const iptc_handle_t handle);
+
+/* Take a snapshot of the rules. Returns NULL on error. */
+iptc_handle_t iptc_init(const char *tablename);
+
+/* Iterator functions to run through the chains; prev = NULL means
+ first chain. Returns NULL at end. */
+const char *iptc_next_chain(const char *prev, iptc_handle_t *handle);
+
+/* How many rules in this chain? */
+unsigned int iptc_num_rules(const char *chain, iptc_handle_t *handle);
+
+/* Get n'th rule in this chain. */
+const struct ipt_entry *iptc_get_rule(const char *chain,
+ unsigned int n,
+ iptc_handle_t *handle);
+
+/* Returns a pointer to the target name of this position. */
+const char *iptc_get_target(const char *chain,
+ unsigned int n,
+ iptc_handle_t *handle);
+
+/* Is this a built-in chain? */
+int iptc_builtin(const char *chain, const iptc_handle_t handle);
+
+/* Get the policy of a given built-in chain */
+const char *iptc_get_policy(const char *chain,
+ struct ipt_counters *counter,
+ iptc_handle_t *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 ipt_chainlabel chain,
+ const struct ipt_entry *e,
+ unsigned int rulenum,
+ iptc_handle_t *handle);
+
+/* Atomically replace rule `rulenum' in `chain' with `e'. */
+int iptc_replace_entry(const ipt_chainlabel chain,
+ const struct ipt_entry *e,
+ unsigned int rulenum,
+ iptc_handle_t *handle);
+
+/* Append entry `e' to chain `chain'. Equivalent to insert with
+ rulenum = length of chain. */
+int iptc_append_entry(const ipt_chainlabel chain,
+ const struct ipt_entry *e,
+ iptc_handle_t *handle);
+
+/* Delete the first rule in `chain' which matches `e'. */
+int iptc_delete_entry(const ipt_chainlabel chain,
+ const struct ipt_entry *origfw,
+ iptc_handle_t *handle);
+
+/* Delete the rule in position `rulenum' in `chain'. */
+int iptc_delete_num_entry(const ipt_chainlabel chain,
+ unsigned int rulenum,
+ iptc_handle_t *handle);
+
+/* Check the packet `e' on chain `chain'. Returns the verdict, or
+ NULL and sets errno. */
+const char *iptc_check_packet(const ipt_chainlabel chain,
+ struct ipt_entry *entry,
+ iptc_handle_t *handle);
+
+/* Flushes the entries in the given chain (ie. empties chain). */
+int iptc_flush_entries(const ipt_chainlabel chain,
+ iptc_handle_t *handle);
+
+/* Zeroes the counters in a chain. */
+int iptc_zero_entries(const ipt_chainlabel chain,
+ iptc_handle_t *handle);
+
+/* Creates a new chain. */
+int iptc_create_chain(const ipt_chainlabel chain,
+ iptc_handle_t *handle);
+
+/* Deletes a chain. */
+int iptc_delete_chain(const ipt_chainlabel chain,
+ iptc_handle_t *handle);
+
+/* Renames a chain. */
+int iptc_rename_chain(const ipt_chainlabel oldname,
+ const ipt_chainlabel newname,
+ iptc_handle_t *handle);
+
+/* Sets the policy on a built-in chain. */
+int iptc_set_policy(const ipt_chainlabel chain,
+ const ipt_chainlabel policy,
+ iptc_handle_t *handle);
+
+/* Get the number of references to this chain */
+int iptc_get_references(unsigned int *ref,
+ const ipt_chainlabel chain,
+ iptc_handle_t *handle);
+
+/* Makes the actual changes. */
+int iptc_commit(iptc_handle_t *handle);
+
+/* Get raw socket. */
+int iptc_get_raw_socket();
+
+/* Translates errno numbers into more human-readable form than strerror. */
+const char *iptc_strerror(int err);
+#endif /* _LIBIPTC_H */