1 /* 2 * libipq.h 3 * 4 * IPQ library for userspace. 5 * 6 * Author: James Morris <jmorris (at) 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" 35 typedef u_int64_t ipq_id_t; 36 #else 37 #include <linux/netfilter_ipv4/ip_queue.h> 38 typedef 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 /* FIXME: glibc sucks */ 49 #ifndef MSG_TRUNC 50 #define MSG_TRUNC 0x20 51 #endif 52 53 struct ipq_handle 54 { 55 int fd; 56 u_int8_t blocking; 57 struct sockaddr_nl local; 58 struct sockaddr_nl peer; 59 }; 60 61 struct ipq_handle *ipq_create_handle(u_int32_t flags, u_int32_t protocol); 62 63 int ipq_destroy_handle(struct ipq_handle *h); 64 65 ssize_t ipq_read(const struct ipq_handle *h, 66 unsigned char *buf, size_t len, int timeout); 67 68 int ipq_set_mode(const struct ipq_handle *h, u_int8_t mode, size_t len); 69 70 ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf); 71 72 int ipq_message_type(const unsigned char *buf); 73 74 int ipq_get_msgerr(const unsigned char *buf); 75 76 int ipq_set_verdict(const struct ipq_handle *h, 77 ipq_id_t id, 78 unsigned int verdict, 79 size_t data_len, 80 unsigned char *buf); 81 82 int ipq_ctl(const struct ipq_handle *h, int request, ...); 83 84 char *ipq_errstr(void); 85 void ipq_perror(const char *s); 86 87 #endif /* _LIBIPQ_H */ 88 89
