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linux下的lcx

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linux下的lcx

作者：不详文章来源：CnXHacker.Net 点击数：更新时间：2007-6-16

以下是代码片段：
/* Socket data transport tool
* by bkbll(bkbll@cnhonker.net)
* [bkbll@mobile socket]$ uname -a
* Linux mobile 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 i686 i386 GNU/Linux
* [bkbll@mobile socket]$ gcc -o trtool trtool.c
* [bkbll@mobile socket]$ ./trtool
* Socket data transport tool
* by bkbll(bkbll@cnhonker.net)
* Usage:./trtool -m method [-h1 host1] -p1 port1 [-h2 host2] -p2 port2 [-v] [-log filename]
* -v: version
* -h1: host1
* -h2: host2
* -p1: port1
* -p2: port2
* -log: log the data
* -m: the action method for this tool
* 1: listen on PORT1 and connect to HOST2:PORT2
* 2: listen on PORT1 and PORT2
* 3: connect to HOST1:PORT1 and HOST2:PORT2
*/
#include <sys/time.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <netdb.h>

#define VERSION "2.2"
#define TIMEOUT 300
#define max(a,b) (a)>(b)?(a):(b)
#define MAXSIZE 10240
#define HOSTLEN 40
#define CONNECT_NUMBER 5

/* define function here */
void usage(char *s);
void transdata(int fd1,int fd2);
void closeallfd();
void makelog(char *buffer,int length);
int testifisvalue(char *str);
int bind2conn(int port1,char *host,int port2);
int bind2bind(int port1,int port2);
int conn2conn(char *host1,int port1,char *host2,int port2);
int create_socket();
int create_serv(int sockfd,int port);
int client_connect(int sockfd,char* server,int port);

/* define GLOBAL varible here */
extern int errno;
FILE *fp;

main(int argc,char **argv)
{
char **p;
char host1[HOSTLEN],host2[HOSTLEN];
int port1=0,port2=0,method=0;
int length;
char *logfile=NULL;

p=argv;
memset(host1,0,HOSTLEN);
memset(host2,0,HOSTLEN);
while(*p)
{
if(strcmp(*p,"-v")==0)
{
printf("Socket data transport tool.\r\nVersion:%s\r\n",VERSION);
p++;
continue;
}
if(strcmp(*p,"-h1")==0)
{
if(testifisvalue(*(p+1))==1)
{
length=(strlen(*(p+1))>HOSTLEN-1)?HOSTLEN-1:strlen(*(p+1));
strncpy(host1,*(++p),length);
}
p++;
continue;
}
if(strcmp(*p,"-h2")==0)
{
if(testifisvalue(*(p+1))==1)
{
length=(strlen(*(p+1))>HOSTLEN-1)?HOSTLEN-1:strlen(*(p+1));
strncpy(host2,*(++p),length);
}
p++;
continue;
}
if(strcmp(*p,"-p1")==0)
{
if(testifisvalue(*(p+1))==1)
port1=atoi(*(++p));
p++;
continue;
}
if(strcmp(*p,"-p2")==0)
{
if(testifisvalue(*(p+1))==1)
port2=atoi(*(++p));
p++;
continue;
}
if(strcmp(*p,"-m")==0)
{
if(testifisvalue(*(p+1))==1)
method=atoi(*(++p));
p++;
continue;
}
if(strcmp(*p,"-log")==0)
{
if(testifisvalue(*(p+1))==1)
logfile=*(++p);
else
{
printf("[ERROR]:must supply logfile name\r\n");
exit(0);
}
p++;
continue;
}
p++;
}
signal(SIGCLD,SIG_IGN);
signal(SIGINT,&closeallfd);
if(logfile !=NULL)
{
fp=fopen(logfile,"a");
if(fp == NULL )
{
perror("open logfile");
exit(0);
}
}
makelog("######################## start ################\r\n",49);
switch(method)
{
case 0:
usage(argv[0]);
break;
case 1:
if((port1==0) || (port2==0))
{
printf("[ERROR]:must supply PORT1 and PORT2.\r\n");
break;
}
if(strlen(host2)==0)
{
printf("[ERROR]:must supply HOST2.\r\n");
break;
}
bind2conn(port1,host2,port2);
break;
case 2:
if((port1==0) || (port2==0))
{
printf("[ERROR]:must supply PORT1 and PORT2.\r\n");
break;
}
bind2bind(port1,port2);
break;
case 3:
if((port1==0) || (port2==0))
{
printf("[ERROR]:must supply PORT1 and PORT2.\r\n");
break;
}
if(strlen(host1)==0)
{
printf("[ERROR]:must supply HOST1.\r\n");
break;
}
if(strlen(host2)==0)
{
printf("[ERROR]:must supply HOST2.\r\n");
break;
}
conn2conn(host1,port1,host2,port2);
break;
default:
usage(argv[0]);
}
closeallfd();
}

int testifisvalue(char *str)
{
if(str == NULL ) return(0);
if(str[0]=='-') return(0);
return(1);
}

void usage(char *s)
{
printf("Socket data transport tool\r\n");
printf("by bkbll(bkbll@cnhonker.net)\r\n\r\n");
printf("Usage:%s -m method [-h1 host1] -p1 port1 [-h2 host2] -p2 port2 [-v] [-log filename]\r\n",s);
printf(" -v: version\r\n");
printf(" -h1: host1\r\n");
printf(" -h2: host2\r\n");
printf(" -p1: port1\r\n");
printf(" -p2: port2\r\n");
printf(" -log: log the data\r\n");
printf(" -m: the action method for this tool\r\n");
printf(" 1: listen on PORT1 and connect to HOST2:PORT2\r\n");
printf(" 2: listen on PORT1 and PORT2\r\n");
printf(" 3: connect to HOST1:PORT1 and HOST2:PORT2\r\n");

closeallfd();
}

int bind2conn(int port1,char *host,int port2)
{
int sockfd,sockfd1,sockfd2;
struct sockaddr_in remote;
int size;
int pid;
char buffer[1024];

memset(buffer,0,1024);
if((sockfd=create_socket())==0) exit(0);
if(create_serv(sockfd,port1)==0)
{
close(sockfd1);
exit(0);
}
size=sizeof(struct sockaddr);
while(1)
{
printf("waiting for response.........\n");
if((sockfd1=accept(sockfd,(struct sockaddr *)&remote,&size))<0){perror("accept error\n");continue;}
printf("accept a client from %s:%d\n",inet_ntoa(remote.sin_addr),ntohs(remote.sin_port));
if((sockfd2=create_socket())==0)
{
close(sockfd1);
continue;
}
printf("make a connection to %s:%d....",host,port2);
fflush(stdout);
if(client_connect(sockfd2,host,port2)==0)
{
close(sockfd2);
sprintf(buffer,"[SERVER]connection to %s:%d error\r\n",host,port2);
write(sockfd1,buffer,strlen(buffer));
memset(buffer,0,1024);
close(sockfd1);
continue;
}
printf("ok\r\n");
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
// sleep(2);
close(sockfd1);
close(sockfd2);
}

}

int bind2bind(int port1,int port2)
{
int fd1,fd2,sockfd1,sockfd2;
struct sockaddr_in client1,client2;
int size1,size2;
int pid;

if((fd1=create_socket())==0) exit(0);
if((fd2=create_socket())==0) exit(0);
printf("binding port %d......",port1);
fflush(stdout);
if(create_serv(fd1,port1)==0)
{
close(fd1);
exit(0);
}
printf("ok\r\n");
printf("binding port %d......",port2);
fflush(stdout);
if(create_serv(fd2,port2)==0)
{
close(fd2);
exit(0);
}
printf("ok\r\n");
size1=size2=sizeof(struct sockaddr);
while(1)
{
printf("waiting for response on port %d.........\n",port1);
if((sockfd1=accept(fd1,(struct sockaddr *)&client1,&size1))<0)
{
perror("accept1 error");
continue;
}
printf("accept a client on port %d from %s,waiting another on port %d....\n",port1,inet_ntoa(client1.sin_addr),port2);
if((sockfd2=accept(fd2,(struct sockaddr *)&client2,&size2))<0)
{
perror("accept2 error");
close(sockfd1);
continue;
}
printf("accept a client on port %d from %s\n",port2,inet_ntoa(client2.sin_addr));
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
//sleep(2);
close(sockfd1);
close(sockfd2);
}
}

int conn2conn(char *host1,int port1,char *host2,int port2)
{
int sockfd1,sockfd2;
int pid;

while(1)
{
if((sockfd1=create_socket())==0) exit(0);
if((sockfd2=create_socket())==0) exit(0);
printf("make a connection to %s:%d....",host1,port1);
fflush(stdout);
if(client_connect(sockfd1,host1,port1)==0)
{
close(sockfd1);
close(sockfd2);
break;
}
printf("ok\r\n");
printf("make a connection to %s:%d....",host2,port2);
fflush(stdout);
if(client_connect(sockfd2,host2,port2)==0)
{
close(sockfd1);
close(sockfd2);
break;
}
printf("ok\r\n");
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
//sleep(2);
close(sockfd1);
close(sockfd2);

}
}

void transdata(int fd1,int fd2)
{
struct timeval timeset;
fd_set readfd,writefd;
int result,i=0;
char read_in1[MAXSIZE],send_out1[MAXSIZE];
char read_in2[MAXSIZE],send_out2[MAXSIZE];
int read1=0,totalread1=0,send1=0;
int read2=0,totalread2=0,send2=0;
int sendcount1,sendcount2;
int maxfd;
struct sockaddr_in client1,client2;
int structsize1,structsize2;
char host1[20],host2[20];
int port1=0,port2=0;
char tmpbuf1[100],tmpbuf2[100];

memset(host1,0,20);
memset(host2,0,20);
memset(tmpbuf1,0,100);
memset(tmpbuf2,0,100);
if(fp!=NULL)
{
structsize1=sizeof(struct sockaddr);
structsize2=sizeof(struct sockaddr);
if(getpeername(fd1,(struct sockaddr *)&client1,&structsize1)<0)
{
strcpy(host1,"fd1");
}
else
{
printf("got,ip:%s,port:%d\r\n",inet_ntoa(client1.sin_addr),ntohs(client1.sin_port));
strcpy(host1,inet_ntoa(client1.sin_addr));
port1=ntohs(client1.sin_port);
}
if(getpeername(fd2,(struct sockaddr *)&client2,&structsize2)<0)
{
strcpy(host2,"fd2");
}
else
{
printf("got,ip:%s,port:%d\r\n",inet_ntoa(client2.sin_addr),ntohs(client2.sin_port));
strcpy(host2,inet_ntoa(client2.sin_addr));
port2=ntohs(client2.sin_port);
}
sprintf(tmpbuf1,"\r\n########### read from %s:%d ####################\r\n",host1,port1);
sprintf(tmpbuf2,"\r\n########### reply from %s:%d ####################\r\n",host2,port2);
}

maxfd=max(fd1,fd2)+1;
memset(read_in1,0,MAXSIZE);
memset(read_in2,0,MAXSIZE);
memset(send_out1,0,MAXSIZE);
memset(send_out2,0,MAXSIZE);

timeset.tv_sec=TIMEOUT;
timeset.tv_usec=0;
while(1)
{
FD_ZERO(&am

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