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UX-Socket problem, server stuck on accept() when recovering

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alon_2002

Posted: Apr 21 2005, 03:23 PM

Newbie

Group: Members
Posts: 1
Member No.: 938
Joined: 21-April 05

Hello.
I have a bug in my server UX-socket program which runs on linux with kernel 2.6.7.

the bug is that when I crash my program and start it up again (while the client is still running) the server gets stuck on the accept() function and cannot contnue.
I know the problem is not in the client, since it was tested already with other servers successfly. :huh: :huh:
Please Please help me, let me knoe what you can make of this:

here is the code from my server:

CODE

//1. open socket for client to connect
int sockfd;
if ((sockfd = socket(AF_UNIX,SOCK_STREAM,0))==-1){
cerr << "Cannot allocate a free socket... Exiting.\n";
exit (1);
}

struct sockaddr_un our_addr;
bzero((char *) &our_addr, sizeof(our_addr));
our_addr.sun_family=AF_UNIX;
strcpy(our_addr.sun_path, client_info.socket);
int servlen =strlen(our_addr.sun_path) + sizeof(our_addr.sun_family);

unlink(client_info.socket);

if (bind(sockfd,(struct sockaddr *)&our_addr,servlen) == -1) {
cerr << "Cannot bind the port. Exiting.\n";
exit(1);
}

if (listen(sockfd,0) == -1) {
cerr << "Cannot listen the port. Exiting.\n";
exit (1);
}

/* 2. connect */
int fd;

int non_blocking_mode = 1;
int on = 1;

struct sockaddr_un their_addr;
int sun_size = sizeof(struct sockaddr_un);
if ((fd=accept(sockfd, (struct sockaddr *)&their_addr,reinterpret_cast<socklen_t*>(&sun_size))) == -1){
cerr << "Cannot accept the connection. Exiting.\n";
exit (1);
}

/* 3. make the fd NONBLOCK */
int val;
val=fcntl(fd,F_GETFL,0);
val |= O_NONBLOCK;
fcntl(fd,F_SETFL,val);

.
.
.
read() and write() stuff...

.
.
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