Linux进程通讯之二：socket

2014-03-12 21:30:15

采用 udp socket，使用本机回环地址127.0.0.1进程间通讯。

1、头文件

#ifndef __MESSAGE_H__#define __MESSAGE_H__ #include <netinet/in.h>#include <sys/socket.h>#include <netdb.h>#include <arpa/inet.h>  #define DEBUGMSG  0x01    //用于message out  #ifndef true#define true  1#endif#ifndef false#define false 0#endif #define HOST_IP_ADDR "127.0.0.1" #define ID_SERVER_DVR               0x9960 #define ID_CLIENT_TR        0x9950#define ID_CLIENT_X0        0x9940#define ID_CLIENT_X1        0x8890#define ID_CLIENT_X2        0x8880#define ID_CLIENT_X3        0x8870 #define REQ_CONNECTREPEAT     3#define REQ_DISCONNECTREPEAT  4#define REQ_WRITEREPEAT       5#define REQ_READREPEAT        6#define ACK_MASK              0x8000#define ACK_NO                0x8000 #define MSG_REBOOT            0x0001#define MSG_FACTORY_RESET     0x0002 #define REPEATER_BUFF_SIZE 1024 //在以后用到的时候再具体定义            typedef struct{    unsigned char data0;               unsigned long data1;           unsigned char data2;           unsigned char data3;       unsigned char data4;       } IPCSOCKETPARATYPE;  typedef struct {  int s;                     struct sockaddr_in sin;  unsigned short myID;     } MSGSOCKETTYPE;  typedef struct{    unsigned short SourceID;    //源ID    unsigned short DestID;      //目标ID    unsigned short Operation;   //操作类型，0读/1写    unsigned short Type;            //消息类型    unsigned short Size;            //消息长度} MESSAGEHEADTYPE; //创建通道int CreateChannel(  MSGSOCKETTYPE *pmsgSock,  char *ip,                         //目标IP地址，如果是server端，添空NULL  unsigned short ID         //端口号); //删除通道int DeleteChannel(  MSGSOCKETTYPE *pmsgSock,  unsigned short ID                ); //发送消息int sendmessage(  MSGSOCKETTYPE *pmsgSock,  unsigned short ID,    //目的端口，如果是返回发送方填0  void *Message,  int Length); //接收消息int recvmessage(  MSGSOCKETTYPE *pmsgSock,  void *Buffer,  int BufferSize,  int Timeout);     int rs_ConnectRepeaterService(char *ServerIP); int rs_DisconnectRepeaterService(void); int rs_RequstConnect(    unsigned short myID,                                        //请求者    unsigned short type,    const IPCSOCKETPARATYPE *pUartCommAttr, //通讯数据    int Timeout                                                         //超时时间,单位ms,未使用); int rs_RequstDisconnect(unsigned short myID,unsigned short type); int rs_RequstWrite(    unsigned short myID,    unsigned short type,    const unsigned char *Buffer,    int Len); int rs_RequstRead(    unsigned short myID,    unsigned short type,    unsigned char *Buffer,         int BufferSize,                int Timeout             //超时时间，单位ms);int rs_RequstCommute(int *connect,unsigned short type);         #endif

2​、server端

//ipc socket server#include <stdlib.h>#include <stdio.h>#include <sys/ipc.h>#include <sys/msg.h>#include <signal.h>#include <string.h>#include <pthread.h> #include "ipc_socket.h"//#include "srvrepeatif.h" unsigned long debug=0;MSGSOCKETTYPE srvSock; static IPCSOCKETPARATYPE CommPara; void sig_ctrl_z(int z){  DeleteChannel(&srvSock,ID_SERVER_DVR);     printf("[srvrepeat]exit\r\n");  exit(1);} int main(void){  int rxlen=1;     signal(SIGTSTP,sig_ctrl_z);  signal(SIGTERM,sig_ctrl_z);     printf("server:start\n");  CreateChannel(&srvSock,NULL,ID_SERVER_DVR);     while(1)  {    MESSAGEHEADTYPE *pMsgHead;    unsigned char msg[1024];        rxlen=recvmessage(&srvSock,msg,sizeof(msg),1000);    if (rxlen<=0)    {        //没有请求        continue;    }         //有请求到来    if (rxlen<sizeof(MESSAGEHEADTYPE))    {     continue;    }         pMsgHead=(MESSAGEHEADTYPE *)msg;    if ((pMsgHead->Size+sizeof(MESSAGEHEADTYPE))!=rxlen)    {      int i;      {        perror("server:recv msg size error:");        for (i=0;i<rxlen;i++)        {          char buf[8];          sprintf(buf,"%02X",msg[i]);          perror(buf);        }        perror("\r\n");      }      continue;    }        printf("server:Operation->Type (0x%04x)\n",pMsgHead->Type);         switch (pMsgHead->Operation)    {      case REQ_CONNECTREPEAT:      {        int Timeout;        printf("server:Operation->REQ_CONNECTREPEAT, req connect\n");        memcpy(&CommPara,msg+sizeof(MESSAGEHEADTYPE),sizeof(CommPara));        memcpy(&Timeout,msg+sizeof(MESSAGEHEADTYPE)+sizeof(IPCSOCKETPARATYPE),sizeof(Timeout));         if(1)   //success        {             pMsgHead->Operation |= ACK_MASK;            pMsgHead->Size=0;                         sendmessage(&srvSock,0,msg,sizeof(MESSAGEHEADTYPE));             printf("server:Operation->REQ_CONNECTREPEAT success, sendmessage finish\n\n");             break;        }        else        {            pMsgHead->Operation = ACK_NO;            pMsgHead->Size=0;            sendmessage(&srvSock,0,msg,sizeof(MESSAGEHEADTYPE));            printf("server:Operation->REQ_CONNECTREPEAT failed, sendmessage finish\n\n");        }      }      break;       case REQ_DISCONNECTREPEAT:      {        printf("server:Operation->REQ_DISCONNECTREPEAT, req disconnect\n");                 pMsgHead->Operation |= ACK_MASK;        pMsgHead->Size=0;        sendmessage(&srvSock,0,msg,sizeof(MESSAGEHEADTYPE));        printf("server:Operation->REQ_CONNECTREPEAT, sendmessage finish\n\n");      }      break;               case REQ_WRITEREPEAT:      {                printf("server:Operation->REQ_WRITEREPEAT, req write\n");                 //printf("[srvrepeat]write:TxSize=%d\r\n",pMsgHead->Size);        pMsgHead->Operation |= ACK_MASK;        pMsgHead->Size=0;        sendmessage(&srvSock,0,msg,sizeof(MESSAGEHEADTYPE));        printf("server:Operation->REQ_WRITEREPEAT, sendmessage finish\n\n");      }      break;               case REQ_READREPEAT:      {        int RxSize;        int Timeout;                 printf("server:Operation->REQ_READREPEAT, req read\n");        memcpy(&RxSize,msg+sizeof(MESSAGEHEADTYPE),sizeof(RxSize));        memcpy(&Timeout,msg+sizeof(MESSAGEHEADTYPE)+sizeof(RxSize),sizeof(Timeout));        if (RxSize>(sizeof(msg)-sizeof(MESSAGEHEADTYPE)-sizeof(RxSize)))//太大了，就弄小点        {            RxSize=sizeof(msg)-sizeof(MESSAGEHEADTYPE)-sizeof(RxSize);        }                printf("server:RxSize=%d,Timeout=%d\n",RxSize,Timeout);         memcpy(msg+sizeof(MESSAGEHEADTYPE),&RxSize,sizeof(RxSize));        pMsgHead->Operation |= ACK_MASK;        pMsgHead->Size=sizeof(RxSize)+RxSize;        sendmessage(&srvSock,0,msg,sizeof(MESSAGEHEADTYPE)+pMsgHead->Size);        printf("server:Operation->REQ_READREPEAT, sendmessage finish\n\n");               }      break;       default:      {                printf("server:Operation->default, req default\n");        pMsgHead->Operation = ACK_NO;        pMsgHead->Size=0;        sendmessage(&srvSock,0,msg,sizeof(MESSAGEHEADTYPE));      }      break;    }   }       sig_ctrl_z(0);  exit(1);}

3、client端

//ipc socket client#include <stdlib.h>#include <stdio.h>#include <sys/ipc.h>#include <sys/msg.h>#include <signal.h>#include <string.h>#include <pthread.h> #include "ipc_socket.h"//#include "srvrepeatif.h" unsigned long debug=0; static IPCSOCKETPARATYPE CommPara; void sig_ctrl_z(int z){  //DeleteChannel(&srvSock,ID_SERVER_DVR);     printf("[srvrepeat]exit\r\n");  exit(1);} int main(void){  int rxlen=1;     signal(SIGTSTP,sig_ctrl_z);  signal(SIGTERM,sig_ctrl_z);     IPCSOCKETPARATYPE IpcSocketAttr;  unsigned char cmd_buff[REPEATER_BUFF_SIZE];   if(rs_ConnectRepeaterService(HOST_IP_ADDR))  {   }  while(1)  {         IpcSocketAttr.data0 = 12;        IpcSocketAttr.data1 = 34;        IpcSocketAttr.data2 = 56;        IpcSocketAttr.data3 = 78;        IpcSocketAttr.data4 = 90;             #define TIMEOUT_RECONNECT   10*1000        if(!rs_RequstConnect(ID_CLIENT_TR,MSG_REBOOT,&IpcSocketAttr,    TIMEOUT_RECONNECT))        {            continue;            return 0;        }                 if(!rs_RequstWrite( ID_CLIENT_TR,MSG_REBOOT,cmd_buff, 7))        {            //continue;            goto Exit_ERR;        }                 memset(cmd_buff,0, REPEATER_BUFF_SIZE);        if( rs_RequstRead(ID_CLIENT_TR,MSG_REBOOT,cmd_buff, REPEATER_BUFF_SIZE,1*1000) <= 0 )        {            //continue;            goto Exit_ERR;        }                 rs_RequstDisconnect(ID_CLIENT_TR,MSG_REBOOT);        //continue;                 return 1;                   Exit_ERR:                 rs_RequstDisconnect(ID_CLIENT_TR,MSG_REBOOT);        return 0;       }       sig_ctrl_z(0);  exit(1);}

 

4、其他 省略