Hi Mateus,
I don't think the problem is with your code but has something to do with
the Bluetooth Master / Slave mode. By default for the RFCOMM connection
opened by the remote device your server is a Bluetooth Slave. And as a
slave you can not handle more than 2 connections at once. To allow more
connections you need your server to do a role switch after connection
setup. Than it will act as a master and can handle up to seven
connections.
Ciao,
Peter
On Tue, 25 Aug 2009, Mateus Interciso wrote:
> Hello, I have a very simple RFCOMM server that I adapted from an extremely
> simple TCP echo server I've made for learning TCP, it's a simple fork()
> server, and while the TCP server works perfeclty, the RFCOMM works only with 2
> connected clients at the same time, and I'm failling to see the problem, can
> someone help me?
>
> Here's the code:
>
> (The commented part if the TCP part)
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <unistd.h>
> #include <string.h>
> #include <errno.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <sys/wait.h>
> #include <bluetooth/bluetooth.h>
> #include <bluetooth/rfcomm.h>
>
> #define MYPORT 10
> #define BACKLOG 31
> #define MAX_SIZE 80
>
> int main(int argc, char *argv[])
> {
> int listenfd, connfd;
> pid_t childpid;
> socklen_t clilen;
> struct sockaddr_rc cliaddr, servaddr;
> char buf[MAX_SIZE];
> int i =0;
>
> //listenfd = socket(AF_INET, SOCK_STREAM, 0);
> listenfd = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
> if(listenfd < 0)
> {
> perror("socket");
> exit(errno);
> }
>
> bzero(&servaddr, sizeof(servaddr));
> servaddr.rc_family = AF_BLUETOOTH;
> servaddr.rc_bdaddr = *BDADDR_ANY;
> servaddr.rc_channel = (uint8_t)MYPORT;
> /*
> servaddr.sin_family = AF_INET;
> servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
> servaddr.sin_port = htons(MYPORT);
> */
> if(bind(listenfd,(struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
> {
> perror("bind");
> exit(errno);
> }
>
> if(listen(listenfd,BACKLOG) < 0)
> {
> perror("listen");
> exit(errno);
> }
>
> while(1)
> {
> clilen = sizeof(cliaddr);
> if((connfd = accept(listenfd, (struct sockaddr*)&cliaddr, &clilen))
> < 0)
> {
> perror("accept");
> exit(errno);
> }
> if((childpid = fork()) == 0)
> {
> i = 0;
> close(listenfd);
> fprintf(stderr,"[DEBUG] Got connection\n");
> memset(buf,'\0',sizeof(buf));
> //echo server
> if(read(connfd, buf, MAX_SIZE) < 0) perror("read");
> else
> if(send(connfd, buf, strlen(buf), 0) < 0) perror("send");
> exit(0);
> }
> close(connfd);
> }
> return 0;
> }
>
>
> Thanks.
> --
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