1/* 2 * libipq.h 3 * 4 * IPQ library for userspace. 5 * 6 * Author: James Morris <jmorris@intercode.com.au> 7 * 8 * Copyright (c) 2000-2001 Netfilter Core Team 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 */ 21#ifndef _LIBIPQ_H 22#define _LIBIPQ_H 23 24#include <errno.h> 25#include <unistd.h> 26#include <fcntl.h> 27#include <sys/types.h> 28#include <sys/socket.h> 29#include <sys/uio.h> 30#include <asm/types.h> 31#include <linux/netlink.h> 32 33#ifdef KERNEL_64_USERSPACE_32 34#include "ip_queue_64.h" 35typedef u_int64_t ipq_id_t; 36#else 37#include <linux/netfilter_ipv4/ip_queue.h> 38typedef unsigned long ipq_id_t; 39#endif 40 41#ifdef DEBUG_LIBIPQ 42#include <stdio.h> 43#define LDEBUG(x...) fprintf(stderr, ## x) 44#else 45#define LDEBUG(x...) 46#endif /* DEBUG_LIBIPQ */ 47 48#ifndef MSG_TRUNC 49#define MSG_TRUNC 0x20 50#endif 51 52struct ipq_handle 53{ 54 int fd; 55 u_int8_t blocking; 56 struct sockaddr_nl local; 57 struct sockaddr_nl peer; 58}; 59 60struct ipq_handle *ipq_create_handle(u_int32_t flags, u_int32_t protocol); 61 62int ipq_destroy_handle(struct ipq_handle *h); 63 64ssize_t ipq_read(const struct ipq_handle *h, 65 unsigned char *buf, size_t len, int timeout); 66 67int ipq_set_mode(const struct ipq_handle *h, u_int8_t mode, size_t len); 68 69ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf); 70 71int ipq_message_type(const unsigned char *buf); 72 73int ipq_get_msgerr(const unsigned char *buf); 74 75int ipq_set_verdict(const struct ipq_handle *h, 76 ipq_id_t id, 77 unsigned int verdict, 78 size_t data_len, 79 unsigned char *buf); 80 81int ipq_ctl(const struct ipq_handle *h, int request, ...); 82 83char *ipq_errstr(void); 84void ipq_perror(const char *s); 85 86#endif /* _LIBIPQ_H */ 87