static DWORD WINAPI
#else
static void*
#endif
einode_thread(void* num)
{
int n = (int)num;
ei_cnode ec;
char myname[100], destname[100];
int r, fd;
sprintf(myname, "ei%d", n);
sprintf(destname, "mth%d", n);
printf("thread %d (%s %s) connecting\n", n, myname, destname);
r = ei_connect_init(&ec, myname, cookie, 0);
fd = ei_connect(&ec, (char*)desthost);
if (r == 0 && fd >= 0) {
ei_x_buff x;
ei_x_new_with_version(&x);
ei_x_encode_string(&x, myname);
ei_reg_send(&ec, fd, destname, x.buff, x.index);
ei_x_free(&x);
//SleepEx(100);
shutdown(fd, SD_SEND);
closesocket(fd);
} else {
printf("coudn't connect fd %d r %d\n", fd, r); // DebugBreak();
}
printf("done thread %d\n", n);
return 0;
}
int gn_start_cnode(char **argv) {
extern ei_cnode ec;
char rem_node_name[MAXATOMLEN] = ""; /* other node name */
ei_x_buff xbuf;
erlang_pid *self = ei_self(&ec);
strcat(rem_node_name,REMNODE);
strcat(rem_node_name,"@");
strcat(rem_node_name,REMHOST);
rem_regname = g_strdup(REMREG);
g_print("I am %s, you are %s (%d)\n", NODE_NAME, rem_node_name, ERL_DIST_VSN);
ei_set_compat_rel(ERL_DIST_VSN); /* erlnode version of dist. protocol */
if ( ei_connect_init(&ec, NODE_NAME, COOKIE, CREATION) < 0 )
g_critical("ei_connect_init");
if ( (fd = ei_connect(&ec, rem_node_name)) < 0 )
g_critical("ei_connect failed.\nwrong cookie? erl-dist version mismatch?");
self->num = fd; /* bug?? in ei_reg_send_tmo */
ei_x_new_with_version(&xbuf);
gn_wrap_ans("handshake", &xbuf);
ei_x_encode_empty_list(&xbuf);
gn_send(&xbuf);
ei_x_free(&xbuf);
return fd;
}
bool Client::connect(QByteArray name, QByteArray otherNode, QByteArray cookie)
{
if (name == otherNode)
{
qWarning() << "Node and otherNode names are the same";
return false;
}
if(ei_connect_init(m_ec, name.data(), cookie.data(), creation++) < 0)
{
qWarning() << "Error initialising Erlang CNode";
return false;
}
QByteArray fullName = otherNode + "@localHost";
int fd = ei_connect(m_ec, fullName.data());
if (fd < 0)
{
qWarning() << "Error connecting to Erlang Node";
switch (erl_errno) {
case EHOSTUNREACH:
qWarning() << "Host is unreachable";
break;
case ENOMEM:
qWarning() << "Out of Memory";
break;
case EIO:
qWarning() << "IO Error";
break;
default:
qWarning() << "erl_errno code" << fd;
break;
}
return false;
}
m_fd = fd;
m_listener = new MsgListener(fd, this);
QObject::connect(m_listener, &MsgListener::finished, m_listener, &QObject::deleteLater);
QObject::connect(m_listener, &MsgListener::messageRecieved,
[=](QVariant to, QVariant value) { emit messageRecieved(to, value); });
m_listener->start();
return true;
}
int initialize_ei(std::string localhostname,
std::string remotenodename,
std::string cookie) {
int ei_res;
std::string localhostname2;
std::string alivename;
std::string hostname;
std::string::size_type pos = localhostname.find ("@",0);
if (pos == std::string::npos) {
alivename = localhostname;
hostname = "localhost";
} else {
alivename = localhostname.substr(0, pos);
hostname = localhostname.substr(pos+1, localhostname.size());
}
localhostname2 = alivename+"@"+hostname;
std::cout << "nodename = " << localhostname2 << std::endl <<
"alivename = " << alivename << std::endl <<
"hostname = " << hostname << std::endl;
ei_res = ei_connect_xinit(&ec,
hostname.c_str(),
alivename.c_str(),
localhostname2.c_str(),
NULL, cookie.c_str(), 0);
if (ei_res < 0) {
std::cout << "Failed initializing node" << std::endl;
return ei_res;
}
strcpy(local_pid.node, localhostname2.c_str());
local_pid.num = 0;
local_pid.serial = 0;
local_pid.creation = 0;
connection_fd = ei_connect(&ec, (char *) remotenodename.c_str());
if (connection_fd< 0) {
std::cout << "Failed connecting remote node " << std::endl;
return -1;
}
return 0;
}
static void cmd_ei_connect(char* buf, int len)
{
int index = 0;
char node[256];
int i;
if (ei_decode_atom(buf, &index, node) < 0)
fail("expected atom");
i=ei_connect(&ec, node);
#ifdef VXWORKS
if(i >= 0) {
save_fd(i);
}
#endif
send_errno_result(i);
}
int main(void)
#endif
{
ErlConnect conp;
Erl_IpAddr thisipaddr = (Erl_IpAddr)0;
FILE *fp = (FILE *)0;
char* charp = "foo";
double *doublep = NULL;
double doublex = 0.0;
ei_cnode xec;
ei_reg *ei_regp = NULL;
ei_term eterm;
ei_x_buff eix;
erlang_big *bigp = NULL;
erlang_fun efun;
erlang_msg *msgp = NULL;
erlang_msg emsg;
erlang_pid *pidp = NULL;
erlang_pid epid;
erlang_port eport;
erlang_ref eref;
erlang_trace etrace;
int *intp = NULL;
int intx = 0;
long *longp = NULL;
long longx = 0;
short creation = 0;
struct ei_reg_stat *ei_reg_statp = NULL;
struct ei_reg_tabstat *ei_reg_tabstatp = NULL;
struct hostent *hostp = NULL;
unsigned char * ucharp = (unsigned char *)"foo";
unsigned long *ulongp = NULL;
unsigned long ulongx = 0;
void *voidp = NULL;
#ifndef VXWORKS
EI_LONGLONG *longlongp = (EI_LONGLONG*)NULL;
EI_LONGLONG longlongx = 0;
EI_ULONGLONG *ulonglongp = (EI_ULONGLONG*)NULL;
EI_ULONGLONG ulonglongx = 0;
#endif
enum erlang_char_encoding enc;
intx = erl_errno;
ei_connect_init(&xec, charp, charp, creation);
ei_connect_xinit (&xec, charp, charp, charp, thisipaddr, charp, creation);
ei_connect(&xec, charp);
ei_xconnect (&xec, thisipaddr, charp);
ei_receive(intx, ucharp, intx);
ei_receive_msg(intx, &emsg, &eix);
ei_xreceive_msg(intx, &emsg, &eix);
ei_send(intx, &epid, charp, intx);
ei_reg_send(&xec, intx, charp, charp, intx);
ei_rpc(&xec, intx, charp, charp, charp, intx, &eix);
ei_rpc_to(&xec, intx, charp, charp, charp, intx);
ei_rpc_from(&xec, intx, intx, &emsg, &eix);
ei_publish(&xec, intx);
ei_accept(&xec, intx, &conp);
ei_unpublish(&xec);
ei_thisnodename(&xec);
ei_thishostname(&xec);
ei_thisalivename(&xec);
ei_self(&xec);
ei_gethostbyname(charp);
ei_gethostbyaddr(charp, intx, intx);
ei_gethostbyname_r(charp, hostp, charp, intx, intp);
ei_gethostbyaddr_r(charp, intx, intx, hostp, charp, intx, intp);
ei_encode_version(charp, intp);
ei_x_encode_version(&eix);
ei_encode_long(charp, intp, longx);
ei_x_encode_long(&eix, longx);
ei_encode_ulong(charp, intp, ulongx);
ei_x_encode_ulong(&eix, ulongx);
ei_encode_double(charp, intp, doublex);
ei_x_encode_double(&eix, doublex);
ei_encode_boolean(charp, intp, intx);
ei_x_encode_boolean(&eix, intx);
ei_encode_char(charp, intp, 'a');
ei_x_encode_char(&eix, 'a');
ei_encode_string(charp, intp, charp);
ei_encode_string_len(charp, intp, charp, intx);
ei_x_encode_string(&eix, charp);
ei_x_encode_string_len(&eix, charp, intx);
ei_encode_atom(charp, intp, charp);
ei_encode_atom_as(charp, intp, charp, ERLANG_LATIN1, ERLANG_UTF8);
ei_encode_atom_len(charp, intp, charp, intx);
ei_encode_atom_len_as(charp, intp, charp, intx, ERLANG_ASCII, ERLANG_LATIN1);
ei_x_encode_atom(&eix, charp);
ei_x_encode_atom_as(&eix, charp, ERLANG_LATIN1, ERLANG_UTF8);
ei_x_encode_atom_len(&eix, charp, intx);
ei_x_encode_atom_len_as(&eix, charp, intx, ERLANG_LATIN1, ERLANG_UTF8);
ei_encode_binary(charp, intp, (void *)0, longx);
ei_x_encode_binary(&eix, (void*)0, intx);
ei_encode_pid(charp, intp, &epid);
ei_x_encode_pid(&eix, &epid);
ei_encode_fun(charp, intp, &efun);
ei_x_encode_fun(&eix, &efun);
ei_encode_port(charp, intp, &eport);
ei_x_encode_port(&eix, &eport);
ei_encode_ref(charp, intp, &eref);
ei_x_encode_ref(&eix, &eref);
ei_encode_trace(charp, intp, &etrace);
ei_x_encode_trace(&eix, &etrace);
ei_encode_tuple_header(charp, intp, intx);
ei_x_encode_tuple_header(&eix, longx);
ei_encode_list_header(charp, intp, intx);
ei_x_encode_list_header(&eix, longx);
/* #define ei_encode_empty_list(buf,i) ei_encode_list_header(buf,i,0) */
ei_x_encode_empty_list(&eix);
ei_get_type(charp, intp, intp, intp);
ei_get_type_internal(charp, intp, intp, intp);
ei_decode_version(charp, intp, intp);
ei_decode_long(charp, intp, longp);
ei_decode_ulong(charp, intp, ulongp);
ei_decode_double(charp, intp, doublep);
ei_decode_boolean(charp, intp, intp);
ei_decode_char(charp, intp, charp);
ei_decode_string(charp, intp, charp);
ei_decode_atom(charp, intp, charp);
ei_decode_atom_as(charp, intp, charp, MAXATOMLEN_UTF8, ERLANG_WHATEVER, &enc, &enc);
ei_decode_binary(charp, intp, (void *)0, longp);
ei_decode_fun(charp, intp, &efun);
free_fun(&efun);
ei_decode_pid(charp, intp, &epid);
ei_decode_port(charp, intp, &eport);
ei_decode_ref(charp, intp, &eref);
ei_decode_trace(charp, intp, &etrace);
ei_decode_tuple_header(charp, intp, intp);
ei_decode_list_header(charp, intp, intp);
ei_decode_ei_term(charp, intp, &eterm);
ei_print_term(fp, charp, intp);
ei_s_print_term(&charp, charp, intp);
ei_x_format(&eix, charp);
ei_x_format_wo_ver(&eix, charp);
ei_x_new(&eix);
ei_x_new_with_version(&eix);
ei_x_free(&eix);
ei_x_append(&eix, &eix);
ei_x_append_buf(&eix, charp, intx);
ei_skip_term(charp, intp);
ei_reg_open(intx);
ei_reg_resize(ei_regp, intx);
ei_reg_close(ei_regp);
ei_reg_setival(ei_regp, charp, longx);
ei_reg_setfval(ei_regp, charp, doublex);
ei_reg_setsval(ei_regp, charp, charp);
ei_reg_setpval(ei_regp, charp, voidp, intx);
ei_reg_setval(ei_regp, charp, intx);
ei_reg_getival(ei_regp, charp);
ei_reg_getfval(ei_regp, charp);
ei_reg_getsval(ei_regp, charp);
ei_reg_getpval(ei_regp, charp, intp);
ei_reg_getval(ei_regp, charp, intx);
ei_reg_markdirty(ei_regp, charp);
ei_reg_delete(ei_regp, charp);
ei_reg_stat(ei_regp, charp, ei_reg_statp);
ei_reg_tabstat(ei_regp, ei_reg_tabstatp);
ei_reg_dump(intx, ei_regp, charp, intx);
ei_reg_restore(intx, ei_regp, charp);
ei_reg_purge(ei_regp);
#if defined(HAVE_GMP_H) && defined(HAVE_LIBGMP)
{
mpz_t obj;
ei_decode_bignum(charp, intp, obj);
ei_encode_bignum(charp, intp, obj);
ei_x_encode_bignum(&eix, obj);
}
#endif /* HAVE_GMP_H && HAVE_LIBGMP */
#ifndef VXWORKS
ei_decode_longlong(charp, intp, longlongp);
ei_decode_ulonglong(charp, intp, ulonglongp);
ei_encode_longlong(charp, intp, longlongx);
ei_encode_ulonglong(charp, intp, ulonglongx);
ei_x_encode_longlong(&eix, longlongx);
ei_x_encode_ulonglong(&eix, ulonglongx);
#endif
#ifdef USE_EI_UNDOCUMENTED
ei_decode_intlist(charp, intp, longp, intp);
ei_receive_encoded(intx, &charp, intp, msgp, intp);
ei_send_encoded(intx, pidp, charp, intx);
ei_send_reg_encoded(intx, pidp, charp, charp, intx);
ei_decode_big(charp, intp, bigp);
ei_big_comp(bigp, bigp);
ei_big_to_double(bigp, doublep);
ei_small_to_big(intx, bigp);
ei_alloc_big(intx);
ei_free_big(bigp);
#endif /* USE_EI_UNDOCUMENTED */
return
BUFSIZ +
EAGAIN +
EHOSTUNREACH +
EIO +
EI_BIN +
EI_DELET +
EI_DIRTY +
EI_FLT +
EI_FORCE +
EI_INT +
EI_NOPURGE +
EI_STR +
EMSGSIZE +
ENOMEM +
ERL_ERROR +
ERL_EXIT +
ERL_LINK +
ERL_MSG +
ERL_NO_TIMEOUT +
ERL_REG_SEND +
ERL_SEND +
ERL_TICK +
ERL_TIMEOUT +
ERL_UNLINK +
ETIMEDOUT +
MAXATOMLEN;
}
int erl_connect(char *nodename)
{
int res = ei_connect(&erl_if_ec, nodename);
if (res < 0) erl_errno = EIO;
return res;
}
int main()
{
double result=0;
int i=0;
erlang_pid pid;
CORBA_Environment *env;
ei_cnode ec;
/* Create and init CORBA_Environment */
env = CORBA_Environment_alloc(INBUFSZ,OUTBUFSZ);
/* Initiating the connection */
ei_connect_init(&ec, "c47", COOKIE, 0);
/* Initiating pid*/
strcpy(pid.node, CLNODE);
pid.num = 99;
pid.serial = 0;
pid.creation = 0;
/* Fixing environment variable */
env->_fd = ei_connect(&ec, SNODE);
strcpy(env->_regname,SERVER);
env->_to_pid = NULL;
env->_from_pid = &pid;
if (env->_fd < 0) {
fprintf(stderr,"Error : Cannot connect to Server\n");
/* Free env & buffers */
CORBA_free(env->_inbuf);
CORBA_free(env->_outbuf);
CORBA_free(env);
exit(1);
}
/* Calling the init function */
rmod_random_init(NULL, 1, 2, 3, env);
switch(env->_major) {
case CORBA_NO_EXCEPTION: /* Success */
printf("Init complete !\n");
break;
case CORBA_SYSTEM_EXCEPTION: /* System exception */
printf("Init call failure, reason : %s\n",(char *) CORBA_exception_value(env));
CORBA_exception_free(env);
client_exit(env);
default: /* Should not come here */
client_exit(env);
}
/* Calling the produce function */
for(i=1; i<=10; i++) {
result = rmod_random_produce(NULL, env);
switch(env->_major) {
case CORBA_NO_EXCEPTION: /* Success */
break;
case CORBA_SYSTEM_EXCEPTION: /* System exception */
printf("Init call failure, reason : %s\n",(char *) CORBA_exception_value(env));
CORBA_exception_free(env);
client_exit(env);
default: /* Should not come here */
client_exit(env);
}
printf("the random number nr%d is %f\n",i,result);
}
/* Closing the connection */
close(env->_fd);
/* Free env & buffers */
CORBA_free(env->_inbuf);
CORBA_free(env->_outbuf);
CORBA_free(env);
return 0;
}
static int
erlang_query(DICT_ERLANG *dict_erlang, const char *key, ARGV *nodes,
char *cookie, char *mod, char *fun, char **res)
{
int cur_node;
int err, index, retries;
int res_version, res_type, res_size;
int fd;
ei_cnode ec;
ei_x_buff args;
ei_x_buff resp;
VSTRING *node_name;
node_name = vstring_alloc(15);
/* Get an "unique" name for the node */
vstring_sprintf(node_name, "dict_erlang%u", getpid() % 999);
err = ei_connect_init(&ec, vstring_str(node_name), cookie, 0);
if (err != 0) {
msg_warn_erl("ei_connect_init");
return -1;
}
retries = 3;
retry:
cur_node = dict_erlang->active_node;
do {
fd = ei_connect(&ec, nodes->argv[cur_node]);
if (fd >= 0) {
dict_erlang->active_node = cur_node;
if (msg_verbose)
msg_info("connected to node %s", nodes->argv[cur_node]);
break;
}
cur_node = (cur_node + 1) % nodes->argc;
} while (cur_node != dict_erlang->active_node);
if (fd < 0) {
if (retries > 0 && erl_errno == EIO) {
msg_warn_erl("no suitable nodes found, retrying");
retries--;
goto retry;
}
msg_warn_erl("no suitable nodes found, failing");
return -1;
}
ei_x_new(&args);
ei_x_new(&resp);
ei_x_encode_list_header(&args, 1);
ei_x_encode_binary(&args, key, strlen(key));
ei_x_encode_empty_list(&args);
err = ei_rpc(&ec, fd, mod, fun, args.buff, args.index, &resp);
if (err == -1) {
msg_warn_erl("ei_rpc");
goto cleanup;
}
err = handle_response(dict_erlang, key, &resp, res);
cleanup:
close(fd);
ei_x_free(&args);
ei_x_free(&resp);
return err;
}
