1、安装libpcap(略)
2、安装libnet:
源文件下载地址:http://sourceforge.net/projects/libnet-dev/files/
解压:tar -zxvf libnet-1.2-rc3.tar.gz
cd libnet-1.2-rc3
./configure
make
make install
安装完以后,配置一下动态库路径,否则libnids编译时找不到
方法一:(推荐)
在/etc/ld.so.conf.d 目录下,新建 libnet.conf
内容为 /usr/local/lib
执行 ldconfig
方法二
cat /etc/ld.so.conf
echo "/usr/local/lib" >> /etc/ld.so.conf
ldconfig
如果有提示 /usr/local/lib/libglibxxx.6.20.xx.gdb.py 不是有效ELF文件,可以把该文件删除
qt的话,可能要重新选择调试器,否则可能无法调试
3、安装libnids:
源文件下载地址:http://sourceforge.net/projects/libnids/files/
解压:tar -zxvf libnids-1.24.tar.gz
cd libnids-1.24
./configure
make
make install
我用的是centos6.5,会configure会提示出错
configure: error: Cannot find eventlog version >= 0.2: is pkg-config in path
解决方案: 安装glib2-deve
yum -y installglib2-devel
4、用gcc编译源文件时后面加上:-lpcap -lnet -lnids -lgthread-2.0,因为libnids 1.22以后使用了,glib2库中的gthread-2.0来实现多线程提高效率,因此在编译除了-lnids -lpcap -lnet 以外还要加上 -lgthread-2.0
5、编译用 g++编译时出错,gcc编译提示警告,g++版本4.94
g++ hello.cpp -lpcap -lnet -lnids -lgthread-2.0
hello.cpp:149:44: 错误:从类型‘void (*)(tcp_stream*, void**)’到类型‘void*’的转换无效 [-fpermissive]
nids_register_tcp(tcp_protocol_callback); /*注册回调函数*/
^
In file included from hello.cpp:1:0:
/usr/local/include/nids.h:149:6: 附注:initializing argument 1 of ‘void nids_register_tcp(void*)’
void nids_register_tcp (void (*));
在nids.h中把头文件改了,或者把参数用(void*)强制转换
void nids_register_tcp (void (*));
修改头文件,改成如下声明,参考https://linux.die.net/man/3/libnids
void nids_register_tcp(void (*tcp_func)(struct tcp_stream *ts, void **param));
编译通过
//其他错误,x64系统下
编译命令:
#g++ -g tcp.cpp -o tcp -lpcap -lnet -lnids -lgthread-2.0
错误提示
#/usr/bin/ld: /usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../libnids.a(libnids.o): undefined reference to symbol 'g_thread_exit'
/usr/lib64/libglib-2.0.so.0: error adding symbols: DSO missing from command line
collect2: 错误:ld 返回 1
正确方式:
#g++ -g tcp.cpp -o tcp -lpcap -lnet -lnids -lgthread-2.0 -lglib-2.0
1、前期准备
目前网上的能稳定支持windows的libnids版本为libnids-W32-1.19。网上搜一下有很多,随便下一个并解压缩。由于libnids需要使用winpcap,所以要先下载并安装winpcap。到http://www.winpcap.org/install/default.htm下载最新版winpcap的安装包,然后到http://www.winpcap.org/devel.htm下载程序员开发包。安装winpcap。将libnids-W32-1.19的WIN32-Includes文件夹下文件存至另一个文件夹中(记为include文件夹)。将libnids-W32-1.19的WIN32-LIbraries文件夹下的库,和winpcap程序员开发包WpdPack文件夹中Lib文件夹中的Packet.lib和wpcap.lib放到一个文件夹中(记为lib文件夹)。
2、重新编译libnids库
在目录 WIN32-PRJ中,找到 libnids.dsw ,这个是6.0版本的,我用的是VS2015,打开,重新编译,生成libnids.lib,目前只要这个,把库移动到1中提到的lib文件夹下
3、测试libnids库
新建项目,加入测试代码如下:
#include
#include "nids.h"
using namespace std;
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "wpcap.lib")
#pragma comment(lib, "Packet.lib")
#pragma comment(lib, "libpcap.lib")
#pragma comment(lib, "libnids.lib")
#pragma warning(disable:4996)
//libnidsTest.cpp: 定义控制台应用程序的入口点。
char ascii_string[10000];
char*char_to_ascii(char ch)
/* 此函数的功能主要用于把协议数据进行显示 */
{
memset(ascii_string, 0x00, 10000);
char * string = ascii_string;
if (ch >= 32 && ch <= 126)
{
*string++ = ch;
}
else if (ch == '\n' || ch == '\r')
{
*string++ = ch;
}
else
{
//其它字符以点"."表示
*string++ = '.';
}
return ascii_string;
}
/*
=======================================================================================================================
下面的函数是回调函数,用于分析TCP连接,分析TCP连接状态,对TCP协议传输的数据进行分析
=======================================================================================================================
*/
void tcp_protocol_callback(struct tcp_stream *tcp_connection, void **arg)
{
int i;
char address_string[1024];
char content[65535];
//char content_urgent[65535];
struct tuple4 ip_and_port;
ip_and_port = tcp_connection->addr;
/* 获取TCP连接的地址和端口对 */
strcpy(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.saddr))));
/* 获取源地址 */
sprintf(address_string + strlen(address_string), " : %i", ip_and_port.source);
/* 获取源端口 */
strcat(address_string, " <--->");
strcat(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.daddr))));
/* 获取目的地址 */
sprintf(address_string + strlen(address_string), " : %i", ip_and_port.dest);
/* 获取目的端口 */
strcat(address_string, "\n");
switch (tcp_connection->nids_state) /* 判断LIBNIDS的状态 */
{
case NIDS_JUST_EST:
/* 表示TCP客户端和TCP服务器端建立连接状态*/
tcp_connection->client.collect++;
/* 客户端接收数据 */
tcp_connection->server.collect++;
/* 服务器接收数据 */
tcp_connection->server.collect_urg++;
/* 服务器接收紧急数据 */
tcp_connection->client.collect_urg++;
/* 客户端接收紧急数据 */
printf("%sTCP连接建立\n", address_string);
return;
case NIDS_CLOSE:
/* 表示TCP连接正常关闭 */
printf("--------------------------------\n");
printf("%sTCP连接正常关闭\n", address_string);
return;
case NIDS_RESET:
/* 表示TCP连接被RST关闭 */
printf("--------------------------------\n");
printf("%sTCP连接被RST关闭\n", address_string);
return;
case NIDS_DATA:
/* 表示有新的数据到达 */
{
struct half_stream *hlf;
/* 表示TCP连接的一端的信息,可以是客户端,也可以是服务器端 */
if (tcp_connection->server.count_new_urg)
{
/* 表示TCP服务器端接收到新的紧急数据 */
printf("--------------------------------\n");
strcpy(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.saddr))));
sprintf(address_string + strlen(address_string), " : %i", ip_and_port.source);
strcat(address_string, " urgent---> ");
strcat(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.daddr))));
sprintf(address_string + strlen(address_string), " : %i", ip_and_port.dest);
strcat(address_string, "\n");
address_string[strlen(address_string) + 1] = 0;
address_string[strlen(address_string)] = tcp_connection->server.urgdata;
printf("%s", address_string);
return;
}
if (tcp_connection->client.count_new_urg)
{
/* 表示TCP客户端接收到新的紧急数据 */
printf("--------------------------------\n");
strcpy(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.saddr))));
sprintf(address_string + strlen(address_string), " : %i", ip_and_port.source);
strcat(address_string, " <--- urgent ");
strcat(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.daddr))));
sprintf(address_string + strlen(address_string), " : %i", ip_and_port.dest);
strcat(address_string, "\n");
address_string[strlen(address_string) + 1] = 0;
address_string[strlen(address_string)] = tcp_connection->client.urgdata;
printf("%s", address_string);
return;
}
if (tcp_connection->client.count_new)
{
/* 表示客户端接收到新的数据 */
hlf = &tcp_connection->client;
/* 此时hlf表示的是客户端的TCP连接信息 */
strcpy(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.saddr))));
sprintf(address_string + strlen(address_string), ":%i", ip_and_port.source);
strcat(address_string, " <---");
strcat(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.daddr))));
sprintf(address_string + strlen(address_string), ":%i", ip_and_port.dest);
strcat(address_string, "\n");
printf("--------------------------------\n");
printf("%s", address_string);
memcpy(content, hlf->data, hlf->count_new);
content[hlf->count_new] = '\0';
printf("客户端接收数据\n");
for (i = 0; i < hlf->count_new; i++)
{
printf("%s", char_to_ascii(content[i]));
/* 输出客户端接收的新的数据,以可打印字符进行显示 */
}
printf("\n");
}
else
{
/* 表示服务器端接收到新的数据 */
hlf = &tcp_connection->server;
/* 此时hlf表示服务器端的TCP连接信息 */
strcpy(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.saddr))));
sprintf(address_string + strlen(address_string), ":%i", ip_and_port.source);
strcat(address_string, " ---> ");
strcat(address_string, inet_ntoa(*((struct in_addr*) &(ip_and_port.daddr))));
sprintf(address_string + strlen(address_string), ":%i", ip_and_port.dest);
strcat(address_string, "\n");
printf("--------------------------------\n");
printf("%s", address_string);
memcpy(content, hlf->data, hlf->count_new);
content[hlf->count_new] = '\0';
printf("服务器端接收数据\n");
for (i = 0; i < hlf->count_new; i++)
{
printf("%s", char_to_ascii(content[i]));
/* 输出服务器接收到的新的数据 */
}
printf("\n");
}
}
default:
break;
}
return;
}
int main()
{
nids_params.device = "3";
if (!nids_init())
/* Libnids初始化 */
{
printf("出现错误:%s\n", nids_errbuf);
exit(1);
}
nids_register_tcp((void*)tcp_protocol_callback);
/* 注册回调函数 */
nids_run();
/* Libnids进入循环捕获数据包状态 */
return 0;
}
编译提示出错,大概如下
errorLNK2019: 无法解析的外部符号 "int __cdeclnids_init(void)" (?nids_init@@YAHXZ) ,该符号在函数 _main 中被引用
errorLNK2001: 无法解析的外部符号 "char *nids_errbuf" (?nids_errbuf@@3PADA)
errorLNK2001: 无法解析的外部符号 "structnids_prm nids_params" (?nids_params@@3Unids_prm@@A) 等错误
需要修改nids.h头文件,找到int nids_init ();一行,在该行前加上如下代码:
#ifdef __cplusplus
extern "C"{
#endif
在头文件尾加上
#ifdef __cplusplus
}
#endif
1.19的头文件最终改成如下
/*
Copyright (c) 1999 Rafal Wojtczuk . All rights reserved.
See the file COPYING for license details.
*/
#ifndef _NIDS_NIDS_H
#define _NIDS_NIDS_H
#define NIDS_MAJOR 1
#define NIDS_MINOR 19
#define NIDS_WIN32_PORTING "Goldie Rejuven checksum .org>"
#define NIDS_MINOR 19
#define NIDS_MAJOR 1
#define NIDS_MINOR 19
#ifdef WIN32
#include
#include
#include
typedef unsigned int u_int;
#define LIBNET_LIL_ENDIAN 1
#else
#include
#endif
#define HAVE_NEW_PCAP 0
enum
{
NIDS_WARN_IP = 1,
NIDS_WARN_TCP,
NIDS_WARN_UDP,
NIDS_WARN_SCAN
};
enum
{
NIDS_WARN_UNDEFINED = 0,
NIDS_WARN_IP_OVERSIZED,
NIDS_WARN_IP_INVLIST,
NIDS_WARN_IP_OVERLAP,
NIDS_WARN_IP_HDR,
NIDS_WARN_IP_SRR,
NIDS_WARN_TCP_TOOMUCH,
NIDS_WARN_TCP_HDR,
NIDS_WARN_TCP_BIGQUEUE,
NIDS_WARN_TCP_BADFLAGS
};
#define NIDS_JUST_EST 1
#define NIDS_DATA 2
#define NIDS_CLOSE 3
#define NIDS_RESET 4
#define NIDS_TIMED_OUT 5
#define NIDS_EXITING 6 /* nids is exiting; last chance to get data */
struct tuple4
{
u_short source;
u_short dest;
u_int saddr;
u_int daddr;
};
struct half_stream
{
char state;
char collect;
char collect_urg;
char *data;
int offset;
int count;
int count_new;
int bufsize;
int rmem_alloc;
int urg_count;
u_int acked;
u_int seq;
u_int ack_seq;
u_int first_data_seq;
u_char urgdata;
u_char count_new_urg;
u_char urg_seen;
u_int urg_ptr;
u_short window;
u_char ts_on;
u_int curr_ts;
struct skbuff *list;
struct skbuff *listtail;
};
struct tcp_stream
{
struct tuple4 addr;
char nids_state;
struct lurker_node *listeners;
struct half_stream client;
struct half_stream server;
struct tcp_stream *next_node;
struct tcp_stream *prev_node;
int hash_index;
struct tcp_stream *next_time;
struct tcp_stream *prev_time;
int read;
struct tcp_stream *next_free;
};
struct nids_prm
{
int n_tcp_streams;
int n_hosts;
char *device;
char *filename;
int sk_buff_size;
int dev_addon;
void (*syslog) ();
int syslog_level;
int scan_num_hosts;
int scan_delay;
int scan_num_ports;
void (*no_mem) (char *);
int (*ip_filter) ();
char *pcap_filter;
int promisc;
int one_loop_less;
int pcap_timeout;
};
#ifdef __cplusplus
extern "C" {
#endif
int nids_init ();
void nids_register_ip_frag (void (*));
void nids_register_ip (void (*));
void nids_register_tcp (void (*));
void nids_register_udp (void (*));
void nids_killtcp (struct tcp_stream *);
void nids_discard (struct tcp_stream *, int);
void nids_run ();
int nids_getfd ();
int nids_next ();
#ifdef WIN32
int gettimeofday(struct timeval *tv,struct timezone *tz);
void *GetAdapterFromList(void* device,int index);
#define LOG_ALERT 1 /* action must be taken immediately */
#define LOG_LOCAL0 (16<<3) /* reserved for local use */
#define HAVE_BSD_UDPHDR 1
#define LITTLE_ENDIAN 1234
#define BYTE_ORDER LITTLE_ENDIAN
#endif
extern struct nids_prm nids_params;
extern char *nids_warnings[];
extern char nids_errbuf[];
extern struct pcap_pkthdr *last_pcap_header;
#ifdef __cplusplus
}
#endif
#endif /* _NIDS_NIDS_H */
Libnids抓不到包的问题
运行后,如果出现一直抓不到数据包的情况,其实是网卡驱动没选好。所以我们在main()函数中第一行,添加一句代码:nids_params.device=”2”;将适配器设为真正起作用的设备。修改后的main()函数如下:
int main()
{
nids_params.device =”2”;
if(!nids_init())
{
printf(“出现错误:%s\n”, nids_errbuf);
exit(1);
}
printf(“初始化成功!\n”);
nids_register_tcp(tcp_protocol_callback);
nids_run();
}
如果还不行,就试试3、4…等等。