int send_recv(int sock, const char *name)
{
int to = 100;
assert(nn_setsockopt (sock, NN_SOL_SOCKET, NN_RCVTIMEO, &to, sizeof (to)) >= 0);
while(1)
{
recv_name(sock, name);
sleep(1);
send_name(sock, name);
}
}
/* Distribute keys */
int distribute_key (void) {
int result;
golle_num_t temp = golle_num_new ();
if (!temp) {
fprintf (stderr, "Memory error\n");
return 1;
}
result = h_to_bin (key.h);
if (result != 0) {
return result;
}
/* Send name to opponent */
result = send_name (opponent);
if (result != 0) {
return result;
}
/* Receive name from opponent */
result = recv_name (opponent, opponent_name);
if (result != 0) {
return result;
}
printf ("Opponent's name is '%s'\n", opponent_name);
/* Send h to opponent */
result = send_h (opponent);
if (result != 0) {
return result;
}
/* Receive h from opponent */
result = recv_h (opponent, temp);
if (result != 0) {
return result;
}
printf ("Received h from %s\n", opponent_name);
golle_error err = golle_key_accum_h (&key, temp);
if (err != GOLLE_OK) {
result = (int)err;
fprintf (stderr, "H value accumulation failed.\n");
}
golle_bin_clear (&hbin);
golle_num_delete (temp);
printf ("Key is distributed.\n");
return result;
}
int ei_accept_tmo(ei_cnode* ec, int lfd, ErlConnect *conp, unsigned ms)
{
int fd;
struct sockaddr_in cli_addr;
int cli_addr_len=sizeof(struct sockaddr_in);
unsigned her_version, her_flags;
ErlConnect her_name;
erl_errno = EIO; /* Default error code */
EI_TRACE_CONN0("ei_accept","<- ACCEPT waiting for connection");
if ((fd = ei_accept_t(lfd, (struct sockaddr*) &cli_addr,
&cli_addr_len, ms )) < 0) {
EI_TRACE_ERR0("ei_accept","<- ACCEPT socket accept failed");
erl_errno = (fd == -2) ? ETIMEDOUT : EIO;
goto error;
}
EI_TRACE_CONN0("ei_accept","<- ACCEPT connected to remote");
if (recv_name(fd, &her_version, &her_flags, &her_name, ms)) {
EI_TRACE_ERR0("ei_accept","<- ACCEPT initial ident failed");
goto error;
}
if (her_version <= 4) {
EI_TRACE_ERR0("ei_accept","<- ACCEPT remote version not compatible");
goto error;
}
else {
unsigned our_challenge;
unsigned her_challenge;
unsigned char our_digest[16];
if (send_status(fd,"ok", ms))
goto error;
our_challenge = gen_challenge();
if (send_challenge(fd, ec->thisnodename,
our_challenge, her_version, ms))
goto error;
if (recv_challenge_reply(fd, our_challenge,
ec->ei_connect_cookie,
&her_challenge, ms))
goto error;
gen_digest(her_challenge, ec->ei_connect_cookie, our_digest);
if (send_challenge_ack(fd, our_digest, ms))
goto error;
put_ei_socket_info(fd, her_version, null_cookie, ec);
}
if (conp)
*conp = her_name;
EI_TRACE_CONN1("ei_accept","<- ACCEPT (ok) remote = %s",her_name.nodename);
erl_errno = 0; /* No error */
return fd;
error:
EI_TRACE_ERR0("ei_accept","<- ACCEPT failed");
closesocket(fd);
return ERL_ERROR;
} /* ei_accept */