socket 端口-socket端口扫描代码

设计一个判断端口是否开启的扫描器程序的源代码怎么写？

for(int i=0;i6;i++)

{

for(int j=0;j10;j++)

{

theport[j].rmt_host=rmt_host;

theport[j].p=port[i*10+j];

theport[j].n=j;

Thread[j]=AfxBeginThread(pScan,(LPVOID)theport[j]);

//启动端口扫描线程

hThread[j]=Thread[j]-m_hThread;

Sleep(1);

}

WaitForMultipleObjects(10,hThread,TRUE,120000);

}

//扫描模块代码

SOCKET sockfd;

SOCKADDR_IN addr;

sockfd = socket(AF_INET, SOCK_STREAM, 0);

if (sockfd 0)

{

exit(0);

}

addr.sin_family = AF_INET;

addr.sin_port = htons(port);

addr.sin_addr.s_addr = inet_addr(rmt_host);

int r = connect(sockfd,(struct sockaddr *) addr, sizeof(addr));

//尝试连接端口进行检测

closesocket(sockfd);

//连接返回值处理

if (r!=-1)

{

::PostMessage(hWnd,WM_DISPLAY,port,0);

}

//显示端口扫描结果

LONG CScanDlg::OnDisplay(LONG lParam, UINT wParam)

{

LPSERVENT bar;

CString open;

int p=lParam;

bar = getservbyport(htons(p),"tcp");

open.Format("\t%d号端口(%s)开放!\r\n",p,(bar == NULL) ? "未知" :

bar-s_name);

m_HistoryEdit.AppendString (open);

return 0;

}

用C++编写端口扫描程序

#include stdio.h

#include winsock.h

#define NETWORK_ERROR -1

#define NETWORK_OK 0

#define PORT_MIN 1

#define PORT_MAX 65535

HANDLE hThread;

DWORD hID;

char hostname[30];

int starting_port = 0;

int ending_port = 0;

int nopen = 0;

DWORD portscan();

int main(){

int ret;

WSADATA dat;

DWORD version;

version = MAKEWORD(2,2);

ret = WSAStartup(version,dat);

if(ret != 0){ 

printf("Error initializing Winsock.\n");

WSACleanup();

return NETWORK_ERROR;

}

if(ret == 0){

printf("Enter hostname:");

scanf("%s",hostname);

printf("Enter starting port:");

scanf("%d",starting_port);

if(starting_port  PORT_MIN){

printf("Invalid port number.\n");

WSACleanup();

return NETWORK_ERROR;

}

printf("Enter ending port:");

scanf("%d",ending_port);

if(ending_port  PORT_MAX){

printf("Invalid port number.\n");

WSACleanup();

return NETWORK_ERROR;

}

printf("\nScanning [%s]...\n",hostname);

hThread = CreateThread(0,0,(LPTHREAD_START_ROUTINE)portscan,0,0,hID);

if(hThread == 0){

printf("Failed to create thread.\n");

WSACleanup();

return NETWORK_ERROR;

} 

sleep(-1);

}

WSACleanup();

return NETWORK_OK;

}

DWORD portscan(){

int i,nret;

SOCKET thesocket;

LPHOSTENT hostent;

thesocket = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

hostent = gethostbyname((hostname));

for(i = starting_port;i  ending_port+1;++i){ 

SOCKADDR_IN hostinfo; 

hostinfo.sin_family = AF_INET;

hostinfo.sin_addr=*((LPIN_ADDR)*hostent-h_addr_list);

hostinfo.sin_port = htons(i);

nret = connect(thesocket,(LPSOCKADDR)hostinfo,sizeof(hostinfo)); 

if(nret == 0){

printf("\n\t%d\n",i); 

++nopen;

} 

}

printf("\nScan complete.\n\n");

printf("Number of ports opened = %d\n",nopen);

closesocket(thesocket);

}

100分求linux下C语言端口扫描代码

linux tcp udp 端口扫描源程序

#include sys/socket.h

#include netinet/in.h

#include arpa/inet.h

#include unistd.h

#include errno.h

#include netdb.h

#include stdio.h

#include string.h

#include netinet/ip_icmp.h

#include stdlib.h

#include signal.h

#include libxml/parser.h

#include libxml/tree.h

#define TRUE 1

#define FALSE 0

#define UDP "UDP"

#define TCP "TCP"

#define tcp "tcp"

#define udp "udp"

typedef struct _GsSockStru{

int fd;

int len;

struct sockaddr_in addr;

}GsSockStru;

static int tcptest( char ip[32], char port[20]);

static int udptest( char ip[32], char port[20]);

void sig_alrm( int signo );

static GsSockStru test_sock;

int

main( int argc, char** argv)

{

char string[64];

char port[20];

char pro[20];

char ip[32];

int res;

int i = 0;

int k = 0;

if( argc2 || argc2 )

{

printf("鍙傛暟涓嶆纭?-1\n");

return ( -1 );

}

strcpy( string, argv[1]);

while( *string )

{

if( string[i] == ':' )

break;

pro[k] = string[i];

k++;

i++;

}

pro[k] = '\0';

i++;

k = 0;

while( *string )

{

if( string[i] == ':')

break;

ip[k] = string[i];

k++;

i++;

}

ip[k] = '\0';

i++;

k=0;

while( *string )

{

if( string[i] == '\0')

break;

port[k] = string[i];

k++;

i++;

}

port[k] = '\0';

i++;

memset( test_sock, 0, sizeof( test_sock ) );

if ( ( strcmp( TCP, pro) != 0 ) ( strcmp( UDP, pro) != 0 ) ( strcmp( tcp, pro) != 0 ) ( strcmp( udp, pro) != 0 ))

{

printf ( "鍙傛暟涓嶆纭?锛?\n" );

return (-1);

}

if ( strcmp( TCP, pro) == 0 || strcmp( tcp, pro) == 0 )

res = tcptest( ip, port );

if ( strcmp( UDP, pro) == 0 || strcmp( udp, pro) == 0 )

res = udptest( ip, port );printf("%d\n",res);

return ( res );

}

int

tcptest( char ip[32], char port[20])

{

int res;

struct timeval tv;

test_sock.fd = socket( AF_INET, SOCK_STREAM, 0 );

if ( test_sock.fd 0 )

{

printf( "create socket failed -3 \n" );

return ( -3 );

}

memset( ( test_sock.addr ), 0, sizeof( test_sock.addr ) );

test_sock.addr.sin_family = AF_INET;

test_sock.addr.sin_port = htons( atoi( port ) );

inet_pton( AF_INET, ip, test_sock.addr.sin_addr );

test_sock.len = sizeof( struct sockaddr );

tv.tv_sec = 10;

tv.tv_usec = 0;

setsockopt( test_sock.fd, SOL_SOCKET, SO_RCVTIMEO,

(const char *)tv, sizeof( tv ) );

res = connect( test_sock.fd,

( struct sockaddr * )( ( test_sock.addr ) ),

test_sock.len );

if ( res 0 )

{

fprintf( stderr, "connect failed 0\n" );

close( test_sock.fd );

return FALSE;

}

close( test_sock.fd );

return TRUE;

}

int udptest( char ip[32], char port[20])

{

struct icmphdr *icmp_header;

struct sockaddr_in target_info;

int target_info_len;

fd_set read_fd;

int scan_port;

char recvbuf[5000];

struct sockaddr_in target_addr;

int icmp_socket;

int udp_socket;

struct timeval tv;

icmp_header = (struct icmphdr *)(recvbuf+sizeof(struct iphdr));

scan_port = atoi( port );

target_addr.sin_family = AF_INET;

inet_pton( AF_INET, ip, target_addr.sin_addr );

target_addr.sin_port = htons(scan_port);

if ((udp_socket=socket(AF_INET,SOCK_DGRAM,0))==-1)

{

printf("create socket failed -3\n");

return -3;

}

if ((icmp_socket=socket(AF_INET,SOCK_RAW,IPPROTO_ICMP))==-1)

{

printf("Create raw socket failed -3\n");

return -3;

}

sendto(udp_socket,NULL,0,0,(void *)target_addr,sizeof(target_addr));

FD_ZERO(read_fd);

FD_SET(icmp_socket,read_fd);

tv.tv_sec = 1;

tv.tv_usec = 0;

select(FD_SETSIZE,read_fd,NULL,NULL,tv);

for (;;){

if (FD_ISSET(icmp_socket,read_fd))

{

target_info_len = sizeof(target_info);

recvfrom(icmp_socket,recvbuf,5000,0,

(struct sockaddr *)target_info,target_info_len);

if (target_info.sin_addr.s_addr == target_addr.sin_addr.s_addr

icmp_header-type == 3 icmp_header-code=12)

{

printf("Port %d : Close\n",scan_port);

return (0);

}

}

return (1) ;

}

}