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#if 1
while(1)
{
num = 0;
recnum = 20;
socket_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (-1 == socket_fd)
{
printf("socket_fd create fail\n");
return;
}
setsockopt(socket_fd,SOL_SOCKET,SO_REUSEADDR,&one,sizeof(one));
int flags = fcntl(socket_fd,F_GETFL,0);
fcntl(socket_fd, F_SETFL, flags|O_NONBLOCK);
int imode =1;
ioctl(socket_fd,FIONBIO, &imode);
while((connect(socket_fd, (struct sockaddr *)&g_socket_addr, sizeof(g_socket_addr))) == -1)
{
sleep(1);
if(num++ > 20)
{
printf("num over!\n");
break;
}
printf("connect retry!\n");
}
if(num >= 20)
{
if(socket_fd > 0)
{
close(socket_fd);
socket_fd = -1;
continue;
}
}
num = 0;
printf("connect server 219.144.130.27\n");
do
{
char * send_string = "+123456+";
int len = write(socket_fd, send_string, strlen(send_string));
printf("write data...\n");
if (len <= 0)
{
printf("send fail \n");
break;
}
sleep(2);
memset(data_buf,0,sizeof(data_buf));
len = recv(socket_fd, data_buf, 15,MSG_NOSIGNAL);
if(len == -1) //数据收发异常从这里能看出,断网也是从这里退出
{
printf("start again rec \n");
printf("error:%d = <%s>\n",errno,strerror(errno));
if (write(socket_fd, send_string, strlen(send_string)) <= 0)
{
printf("write fail \n");
break;
}
printf("write data...\n");
for(;recnum > 0&&(len == -1);recnum--)
{
sleep(1);
memset(data_buf,0,sizeof(data_buf));
len = recv(socket_fd, data_buf, 15,MSG_NOSIGNAL);
}
if(recnum <= 0)
{
printf("rec len -1\n");
break;
}
else
{
printf(" rec ok \n");
continue;
}
}
else
{
if(len > 0)
{
printf("rec:%s\n",data_buf);
}
else if(len <= 0)
{
printf("len <=0!\n");
break;
}
}
}
while(1);
close(socket_fd);
usleep(200*1000);
}
#endif
void HexDump(char *buf,int len,int addr) {
int i,j,k;
char binstr[80];
for (i=0;i<len;i++) {
if (0==(i%16)) {
sprintf(binstr,"%08x -",i+addr);
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
} else if (15==(i%16)) {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
sprintf(binstr,"%s ",binstr);
for (j=i-15;j<=i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
} else {
sprintf(binstr,"%s %02x",binstr,(unsigned char)buf[i]);
}
}
if (0!=(i%16)) {
k=16-(i%16);
for (j=0;j<k;j++) {
sprintf(binstr,"%s ",binstr);
}
sprintf(binstr,"%s ",binstr);
k=16-k;
for (j=i-k;j<i;j++) {
sprintf(binstr,"%s%c",binstr,('!'<buf[j]&&buf[j]<='~')?buf[j]:'.');
}
printf("%s\n",binstr);
}
}