bluetoothctl demo

//client.c  gcc -lbluetooth

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>

int main( int argc , char **argv)
{
   struct sockaddr_rc addr={0};
   int s,status;
   char buf[1024];
   char dst[] = "58:88:97:4F:2C:41";
   time_t t;

   // a l l o c a t e a s oc k e t
   s=socket(PF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM);
   if(s<0) {
       perror("create socket error");
       exit(1);
   }

   // s e t the conne c t ion parameter s (who to connect to )
   addr.rc_family=AF_BLUETOOTH;
   addr.rc_channel=(uint8_t)1;
   str2ba(dst,&addr.rc_bdaddr);
   // connect to s e r v e r
   printf("connectting...\n");
   status=connect(s,(struct sockaddr *)&addr,sizeof(addr));

   // send a message
   if(status==0) {
     printf("scuess!\n");

     do{
        gets(buf);
        time(&t);
        sprintf(buf, "{\"ssid\":\"%s\", \"psw\":\"%s\", \"timestamp\":%ld}","360ND", "00000000", t);
   //   sprintf(buf, "{\"ssid\":\"%s\", \"psw\":\"%s\", \"timestamp\":%ld}","SEC", "sec12345", t);
        printf("[%s]\n", buf);
        status=write(s,buf,strlen(buf));
        if(status<0) perror("uh oh");
     }while(strcmp(buf,"goodbye")!=0);
   }
   else {
     printf("Failed!\n");
   }

   close(s);
   return 0;
}

//client.c  gcc -lbluetooth

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>

int main( int argc , char **argv)
{
   struct sockaddr_rc addr={0};
   int s,status;
   char buf[1024];
   char dst[] = "58:88:97:4F:2C:41";
   time_t t;

   // a l l o c a t e a s oc k e t
   s=socket(PF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM);
   if(s<0) {
       perror("create socket error");
       exit(1);
   }

   // s e t the conne c t ion parameter s (who to connect to )
   addr.rc_family=AF_BLUETOOTH;
   addr.rc_channel=(uint8_t)1;
   str2ba(dst,&addr.rc_bdaddr);
   // connect to s e r v e r
   printf("connectting...\n");
   status=connect(s,(struct sockaddr *)&addr,sizeof(addr));

   // send a message
   if(status==0) {
     printf("scuess!\n");

     do{
        gets(buf);
        time(&t);
        sprintf(buf, "{\"ssid\":\"%s\", \"psw\":\"%s\", \"timestamp\":%ld}","360ND", "00000000", t);
   //   sprintf(buf, "{\"ssid\":\"%s\", \"psw\":\"%s\", \"timestamp\":%ld}","SEC", "sec12345", t);
        printf("[%s]\n", buf);
        status=write(s,buf,strlen(buf));
        if(status<0) perror("uh oh");
     }while(strcmp(buf,"goodbye")!=0);
   }
   else {
     printf("Failed!\n");
   }

   close(s);
   return 0;
}

//服务器端应当执行 bluetoothctl -a < cmd.list
//cmd list 的内容 power on + default-agent

//server.c

#include <sys/types.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>


static int s = -1, client = -1;

void on_app_exit(void)
{
    if (client > 0) {
        close(client);
        client = -1;
    }
    if (s > 0)
    {
        close(s);
        s = -1;
    }

    printf("Application Exited. \n");
}

int main (int argc,char **argv)
{
    system("bluetoothctl -a < bluetoothctl.conf");

    struct sockaddr_rc loc_addr ={0},rem_addr={0};
    char buf[1024] ={0};//,*addr;
    int bytes_read,result;
    int opt = sizeof(rem_addr);

    atexit(on_app_exit);

    printf("Creating socket...\n");
    s =socket(PF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM);
    if(s<0) {
        perror("create socket error");
        exit(1);
    }
    else {
        printf("success!\n");
    }

    memset(&loc_addr, 0, sizeof(loc_addr));
    loc_addr.rc_family=AF_BLUETOOTH;
    loc_addr.rc_bdaddr= (bdaddr_t) {{0, 0, 0, 0, 0, 0}};
    loc_addr.rc_channel=(uint8_t)1;

    printf("Binding socket...\n");
    result=bind(s,(struct sockaddr *)&loc_addr, sizeof(loc_addr));
    if(result < 0) {
        perror("bind socket error:");
        system("reboot");
}
    else {
        printf("success!\n");
    }

    printf("Listen... ");
    result=listen(s,1);
    if(result < 0) {
        printf("error:%d\n:",result);
        perror("listen error:");
        exit(1);
    }
    else {
        printf("requested!\n");
    }

    while (1) {
        printf("Accepting...\n");
        client= accept(s,(struct sockaddr *)&rem_addr, (socklen_t*)&opt);
        if(client<0) {
            perror("accept error");
            continue;
        }
        else {
            printf("OK!\n");
        }
        ba2str(&rem_addr.rc_bdaddr,buf);
        fprintf(stderr,"accepted connection from %s \n",buf);
        memset(buf,0,sizeof(buf));

        while(1) {
            bytes_read = recv(client,buf,sizeof(buf),0);
            if(bytes_read > 0) {
                printf("received [%d] bytes.\n",bytes_read);
                memset(buf,0,bytes_read);
            }
        }
    }

    on_app_exit();
    return 0 ;
}