/* 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; }