写了个socket通信的 本机调试正常 在两天机子上就不对了

[bluestar2009]

本机 和两台机子都是 linux

求指教

#include<stdio.h>
#include<sys/socket.h>

//messagequeue
#include<sys/ipc.h>
#include<sys/shm.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<errno.h>
#include<memory.h>

#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>

#define BUFLENGTH	(1024)
#define nPort (6001) //port

struct SndInfo sInfo;

struct SndInfo
{
	int iType;
	char sBuffer[256];
	int iBufferLen;
};
struct msgbuf
{
	long mtype;
	char mtext[BUFLENGTH];
};

int hotMasterSndInfo(int type, char *buffer, int len)
{
	sInfo.iType=type;
	strcpy(sInfo.sBuffer,buffer);
	printf("here sBuffer [%s]\r\n",sInfo.sBuffer);
	sInfo.iBufferLen = len;
}

int main()
{
	int i,ret=0;
	key_t key;
	int msgid;
	int result;
	char sIP[20]={0};
	struct msgbuf data;
	struct hostent *h;
	
	int socket_connect;
	struct sockaddr_in server_addr;
	
	data.mtype = 1;
	bzero(&server_addr,sizeof(server_addr));
	printf("Please input target as Dotted decimal IP: \r\n");
	gets(sIP);
	printf("client start ...\n");
	
	
	key = ftok(".",'a');
	msgid = msgget(key,IPC_CREAT);
	if(msgid < 0)
	{
		perror("messagequeue failed!\n");
		exit(1);
	}
	
	
	while(1)
	{
		printf("waiting for messageQueue......\r\n");
		result = msgrcv(msgid,&data,BUFLENGTH,1,0);
		if (result < 0)
		{
			perror("recv messagequeue failed!\n");
			exit(1);
		}
		printf("rec messagequeue OK!\r\n");
		
		
		memcpy(&sInfo,data.mtext,sizeof(sInfo));
		printf("main type:%d buf[%s] len:[%d]\r\n",sInfo.iType,sInfo.sBuffer,sInfo.iBufferLen); 
		
		socket_connect = socket(AF_INET,SOCK_STREAM,0);
		//cilent address struct fill
		server_addr.sin_family  =AF_INET;
		server_addr.sin_port  =htons(nPort);
		printf("sIP:[%s]\r\n",sIP);
		server_addr.sin_addr.s_addr=inet_addr(sIP);
		
		printf("connect ...\r\n");
		
		if( connect(  socket_connect,(struct sockaddr *)& server_addr,sizeof(server_addr)   )==-1)
		{
			printf("connect error!\r\n");
			exit(1);
		}
		printf("connect success!\n");
		printf("send ...\r\n");
		int sendSequence = 0;
		
		int readBytes=sizeof(data.mtext);
		printf("readBytes=%d\r\n",readBytes);
		if(readBytes==0)
		{
			printf("Buffer transmit over!\r\n");
			exit(1);
			//break;
		}
		else
		{
			printf("Buffer [%d] bytes\r\n",readBytes);
		}
		
		int sendBytes=send(socket_connect,data.mtext,readBytes,0);
		
		if(sendBytes<0)
		{
			printf("send error! \r\n");
			exit(1);
		}
		else
		{
			sendSequence++;
			printf("%d send to server:%d bytes\r\n",sendSequence,sendBytes);
		}
		
		if(close(socket_connect)!=0)
		{
			printf("close() error! \r\n");
		}
		else
		{
			printf("close socket_connect success!\r\n");
		}
	}
	return 0;
}

[bluestar2009]

没人来么

[ocean放飞]

看报什么错误，把错误码打出来看看。

[赵4老师]

不知道有多少前人掉在TCP Socket
send(人多)send(病少)send(财富)
recv(人多病)recv(少财富)
陷阱里面啊！
http://topic.csdn.net/u/20120210/09/51109ed0-07b9-41f2-b487-a51597f2ca01.html

[WYD2608]

本机能通

在其他机子上不能通的原因 是因为 接收端有防火墙

设置一下 或者简单方法 关掉就OK了