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 #include <linux/netfilter_ipv4/ip_queue.h> 34 typedef unsigned long ipq_id_t; 35 36 #ifdef DEBUG_LIBIPQ 37 #include <stdio.h> 38 #define LDEBUG(x...) fprintf(stderr, ## x) 39 #else 40 #define LDEBUG(x...) 41 #endif /* DEBUG_LIBIPQ */ 42 43 /* FIXME: glibc sucks */ 44 #ifndef MSG_TRUNC 45 #define MSG_TRUNC 0x20 46 #endif 47 48 struct ipq_handle 49 { 50 int fd; 51 u_int8_t blocking; 52 struct sockaddr_nl local; 53 struct sockaddr_nl peer; 54 }; 55 56 struct ipq_handle *ipq_create_handle(u_int32_t flags, u_int32_t protocol); 57 58 int ipq_destroy_handle(struct ipq_handle *h); 59 60 ssize_t ipq_read(const struct ipq_handle *h, 61 unsigned char *buf, size_t len, int timeout); 62 63 int ipq_set_mode(const struct ipq_handle *h, u_int8_t mode, size_t len); 64 65 ipq_packet_msg_t *ipq_get_packet(const unsigned char *buf); 66 67 int ipq_message_type(const unsigned char *buf); 68 69 int ipq_get_msgerr(const unsigned char *buf); 70 71 int ipq_set_verdict(const struct ipq_handle *h, 72 ipq_id_t id, 73 unsigned int verdict, 74 size_t data_len, 75 unsigned char *buf); 76 77 int ipq_ctl(const struct ipq_handle *h, int request, ...); 78 79 char *ipq_errstr(void); 80 void ipq_perror(const char *s); 81 82 #endif /* _LIBIPQ_H */ 83 84