Hello. I seem to be having a problem with the connect function in the winsock area of windows. Im trying to get two applciations to speak to each other locally over UDP. However, it seems that the connect function on the sending side doesnt seem to return the correct values. I.E When the recieving end program isnt open and therefore, the port isnt open, conenct just binds any old port and claims it has succeeded. Now i know that the UDP protocol is connectionless but... it seems stupid since i've actually ripped off the MSDN code straight from the MSDN site and it still fails. Should i use something other than connect?

Heres the recieving port code:

int xne_udp_listen(Endpoint endpoint, const char * command) {

struct xne_udp_data * data = (struct xne_udp_data *) endpoint->data;
char * current_token = NULL;
char * local_address = NULL;
struct sockaddr_in* local_sockaddr = (struct sockaddr_in *) malloc( sizeof(struct sockaddr_in) );
int local_port = 0;
int rc = 0;
char * command_token = 0;

fprintf(stderr,"Entering the UDP Listen Func");

/* must be a ready endpoint */
if (endpoint->status != XNE_READY)
return -2;

/* parse the connect command */
command_token = strdup(command);
current_token = strtok(command_token, ":");
if (current_token[0] != '*')
local_address = strdup(current_token);

current_token = strtok(0, ":");
if (strlen(current_token) == 0)
return -2; /* Empty command part */
local_port = atoi(current_token);
free(command_token);

local_sockaddr->sin_family = AF_INET;
local_sockaddr->sin_port = htons(local_port);
if (local_address == NULL) {
local_sockaddr->sin_addr.s_addr = htonl(INADDR_ANY);
} else {
inet_aton(local_address, &local_sockaddr->sin_addr);
free(local_address);
}
rc = bind(data->fd, local_sockaddr, sizeof(struct sockaddr_in));

if (rc < 0) {
#ifdef _WIN32
printError();
#else
fprintf(stderr, "-- errno %d: %s\n", errno, strerror(errno));
#endif
fprintf(stderr, "Cannot bind to local port.\n");
return -1;
}

return 0;
}

Here is the send code:

int xne_udp_connect(Endpoint endpoint, const char * command) {

struct xne_udp_data * data = (struct xne_udp_data *) endpoint->data;
char * current_token = NULL;
char * remote_address = NULL;
struct sockaddr_in remote_sockaddr;
u_short remote_port = 0;
int rc = 0;
char * command_token = NULL;

fprintf(stderr, "UDP Connect: \n");

/* must be a ready endpoint */
if (endpoint->status != XNE_READY)
return -2;

/* parse the connect command */
command_token = strdup(command);
current_token = strtok(command_token, ":");
if (strlen(current_token) == 0)
return -2; /* Empty command part */
remote_address = strdup(current_token);

current_token = strtok(0, ":");
if (strlen(current_token) == 0)
return -2; /* Empty command part */
remote_port = atoi(current_token);
free(command_token);

/* bind to remote port */
remote_sockaddr.sin_family = AF_INET;
remote_sockaddr.sin_port = htons(remote_port);
memset(&(remote_sockaddr.sin_zero),0,sizeof(remote_sockaddr.sin_zero));

fprintf(stderr, "UDP Port: %i\n",remote_sockaddr.sin_port);

fprintf(stderr, "UDP Address: %s\n",remote_address);

remote_sockaddr.sin_addr.s_addr = inet_addr( remote_address );

fprintf(stderr, "inet_addr() = %ld (%ld)\n", inet_addr( remote_address ), INADDR_NONE);

// inet_aton(remote_address, &remote_sockaddr.sin_addr);
free(remote_address);

rc = connect(data->fd, (SOCKADDR *) &remote_sockaddr, sizeof(remote_sockaddr));
// rc = connect(data->fd, 0, 0);

fprintf(stderr, "UDP RC: %i\n",rc);

if (rc < 0) {
fprintf(stderr, "-- errno %d: %s\n", errno, strerror(errno));
fprintf(stderr, "Cannot connect to remote port: %s.\n", command);
return -1;
}

return 0;
}

So, connect simply doesnt work. If i uncomment the following line:

rc = connect(data->fd, 0, 0);

...we get the correct result; that the port cannot be connected to. Of course, thats obvious because i havent specified one. Can anyone help please?