写了个socket通信的 本机调试正常 在两天机子上就不对了
本机 和两台机子都是 linux

求指教

C/C++ code

#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) //portstruct 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;}

[解决办法]
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

------解决方案--------------------

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