/* function to make rpc call to remote node to retrieve a pid -
calls module:function(Ref). The response comes back as
{rex, {Ref, Pid}}
*/
int ei_pid_from_rpc(struct ei_cnode_s *ec, int sockfd, erlang_ref * ref, char *module, char *function)
{
ei_x_buff buf;
ei_x_new(&buf);
ei_x_encode_list_header(&buf, 1);
ei_x_encode_ref(&buf, ref);
ei_x_encode_empty_list(&buf);
ei_rpc_to(ec, sockfd, module, function, buf.buff, buf.index);
ei_x_free(&buf);
return 0;
}
/* function to spawn a process on a remote node */
int ei_spawn(struct ei_cnode_s *ec, int sockfd, erlang_ref * ref, char *module, char *function, int argc, char **argv)
{
int i;
ei_x_buff buf;
ei_x_new_with_version(&buf);
ei_x_encode_tuple_header(&buf, 3);
ei_x_encode_atom(&buf, "$gen_call");
ei_x_encode_tuple_header(&buf, 2);
ei_x_encode_pid(&buf, ei_self(ec));
ei_init_ref(ec, ref);
ei_x_encode_ref(&buf, ref);
ei_x_encode_tuple_header(&buf, 5);
ei_x_encode_atom(&buf, "spawn");
ei_x_encode_atom(&buf, module);
ei_x_encode_atom(&buf, function);
/* argument list */
if (argc < 0) {
ei_x_encode_list_header(&buf, argc);
for (i = 0; i < argc && argv[i]; i++) {
ei_x_encode_atom(&buf, argv[i]);
}
}
ei_x_encode_empty_list(&buf);
/*if (i != argc - 1) { */
/* horked argument list */
/*} */
ei_x_encode_pid(&buf, ei_self(ec)); /* should really be a valid group leader */
#ifdef EI_DEBUG
ei_x_print_reg_msg(&buf, "net_kernel", 1);
#endif
return ei_reg_send(ec, sockfd, "net_kernel", buf.buff, buf.index);
}
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;
}
void uwsgi_erlang_rpc(int fd, erlang_pid *from, ei_x_buff *x) {
int etype, esize;
int arity;
char *gen_call;
char *module;
char *call;
char buffer[0xffff];
char *argv[256] ;
uint16_t argvs[256] ;
int argc = 0;
uint16_t ret;
ei_x_buff xr;
erlang_ref eref;
ei_get_type(x->buff, &x->index, &etype, &esize);
#ifdef UWSGI_DEBUG
uwsgi_log("%d %c %c %c\n", etype, etype, ERL_SMALL_TUPLE_EXT, ERL_LARGE_TUPLE_EXT);
#endif
if (etype != ERL_SMALL_TUPLE_EXT && etype != ERL_LARGE_TUPLE_EXT) return;
ei_decode_tuple_header(x->buff, &x->index, &arity);
#ifdef UWSGI_DEBUG
uwsgi_log("rpc arity %d\n", arity);
#endif
if (arity != 3) return ;
ei_get_type(x->buff, &x->index, &etype, &esize);
if (etype != ERL_ATOM_EXT && etype != ERL_STRING_EXT) return ;
gen_call = uwsgi_malloc(esize);
if (etype == ERL_ATOM_EXT) {
ei_decode_atom(x->buff, &x->index, gen_call);
}
else {
ei_decode_string(x->buff, &x->index, gen_call);
}
#ifdef UWSGI_DEBUG
uwsgi_log("gen call = %s\n", gen_call);
#endif
ei_get_type(x->buff, &x->index, &etype, &esize);
if (etype != ERL_SMALL_TUPLE_EXT) return ;
ei_decode_tuple_header(x->buff, &x->index, &arity);
if (arity != 2) return ;
ei_get_type(x->buff, &x->index, &etype, &esize);
ei_skip_term(x->buff, &x->index);
ei_get_type(x->buff, &x->index, &etype, &esize);
ei_decode_ref(x->buff, &x->index, &eref);
ei_get_type(x->buff, &x->index, &etype, &esize);
module = uwsgi_malloc(esize);
if (etype == ERL_ATOM_EXT) {
ei_decode_atom(x->buff, &x->index, module);
}
else {
ei_decode_string(x->buff, &x->index, module);
}
ei_get_type(x->buff, &x->index, &etype, &esize);
if (etype != ERL_SMALL_TUPLE_EXT) return ;
ei_decode_tuple_header(x->buff, &x->index, &arity);
#ifdef UWSGI_DEBUG
uwsgi_log("arity: %d\n", arity);
#endif
if (arity != 5) return ;
ei_get_type(x->buff, &x->index, &etype, &esize);
char *method = uwsgi_malloc(esize);
if (etype == ERL_ATOM_EXT) {
ei_decode_atom(x->buff, &x->index, method);
}
else {
ei_decode_string(x->buff, &x->index, method);
}
if (strcmp(method, "call")) return;
ei_get_type(x->buff, &x->index, &etype, &esize);
if (etype != ERL_ATOM_EXT && etype != ERL_STRING_EXT) return ;
module = uwsgi_malloc(esize);
if (etype == ERL_ATOM_EXT) {
ei_decode_atom(x->buff, &x->index, module);
}
else {
ei_decode_string(x->buff, &x->index, module);
}
ei_get_type(x->buff, &x->index, &etype, &esize);
if (etype != ERL_ATOM_EXT && etype != ERL_STRING_EXT) return ;
call = uwsgi_malloc(esize);
if (etype == ERL_ATOM_EXT) {
ei_decode_atom(x->buff, &x->index, call);
}
else {
ei_decode_string(x->buff, &x->index, call);
}
#ifdef UWSGI_DEBUG
uwsgi_log("RPC %s %s\n", module, call);
#endif
ei_get_type(x->buff, &x->index, &etype, &esize);
if (etype == ERL_ATOM_EXT) {
argc = 1;
argv[0] = uwsgi_malloc(esize+1);
ei_decode_atom(x->buff, &x->index, argv[0]);
argvs[1] = esize;
}
else if (etype == ERL_STRING_EXT) {
argc = 1;
argv[0] = uwsgi_malloc(esize+1);
ei_decode_string(x->buff, &x->index, argv[0]);
argvs[1] = esize;
}
ret = uwsgi_rpc(call, argc, argv, argvs, buffer);
#ifdef UWSGI_DEBUG
uwsgi_log("buffer: %.*s\n", ret, buffer);
#endif
ei_x_new_with_version(&xr);
ei_x_encode_tuple_header(&xr, 2);
//ei_x_encode_atom(&xr, "rex");
ei_x_encode_ref(&xr, &eref);
ei_x_encode_string_len(&xr, buffer, ret);
uwsgi_log("ei_send to %d %s %d %d %d: %d %d\n", fd, from->node, from->num , from->serial, from->creation, xr.index, ei_send(fd, from, xr.buff, xr.index));
//uwsgi_log("ei_send to %d %s %d %d %d: %d %d\n", fd, from->node, from->num , from->serial, from->creation, xr.index, ei_reg_send(&uerl.cnode, fd, "rex", xr.buff, xr.index));
}
/* {'$gen_call', {<[email protected]>, #Ref<254770.4.0>}, {is_auth, cpx@freecpx} */
static switch_status_t handle_net_kernel_msg(listener_t *listener, erlang_msg * msg, ei_x_buff * buf, ei_x_buff * rbuf)
{
int version, size, type, arity;
char atom[MAXATOMLEN];
erlang_ref ref;
erlang_pid pid;
buf->index = 0;
ei_decode_version(buf->buff, &buf->index, &version);
ei_get_type(buf->buff, &buf->index, &type, &size);
if (type != ERL_SMALL_TUPLE_EXT && type != ERL_SMALL_TUPLE_EXT) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "not a tuple\n");
return SWITCH_STATUS_FALSE;
}
ei_decode_tuple_header(buf->buff, &buf->index, &arity);
if (arity != 3) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "wrong arity\n");
return SWITCH_STATUS_FALSE;
}
if (ei_decode_atom(buf->buff, &buf->index, atom) || strncmp(atom, "$gen_call", MAXATOMLEN)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "not gen_call\n");
return SWITCH_STATUS_FALSE;
}
ei_get_type(buf->buff, &buf->index, &type, &size);
if (type != ERL_SMALL_TUPLE_EXT && type != ERL_SMALL_TUPLE_EXT) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "not a tuple\n");
return SWITCH_STATUS_FALSE;
}
ei_decode_tuple_header(buf->buff, &buf->index, &arity);
if (arity != 2) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "wrong arity\n");
return SWITCH_STATUS_FALSE;
}
if (ei_decode_pid(buf->buff, &buf->index, &pid) || ei_decode_ref(buf->buff, &buf->index, &ref)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "decoding pid and ref error\n");
return SWITCH_STATUS_FALSE;
}
ei_get_type(buf->buff, &buf->index, &type, &size);
if (type != ERL_SMALL_TUPLE_EXT && type != ERL_SMALL_TUPLE_EXT) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "not a tuple\n");
return SWITCH_STATUS_FALSE;
}
ei_decode_tuple_header(buf->buff, &buf->index, &arity);
if (arity != 2) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "bad arity\n");
return SWITCH_STATUS_FALSE;
}
if (ei_decode_atom(buf->buff, &buf->index, atom) || strncmp(atom, "is_auth", MAXATOMLEN)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "not is_auth\n");
return SWITCH_STATUS_FALSE;
}
/* To ! {Tag, Reply} */
ei_x_encode_tuple_header(rbuf, 2);
ei_x_encode_ref(rbuf, &ref);
ei_x_encode_atom(rbuf, "yes");
switch_mutex_lock(listener->sock_mutex);
ei_send(listener->sockfd, &pid, rbuf->buff, rbuf->index);
switch_mutex_unlock(listener->sock_mutex);
#ifdef EI_DEBUG
ei_x_print_msg(rbuf, &pid, 1);
#endif
return SWITCH_STATUS_FALSE;
}
