--- /dev/null
+/*
+ * Copyright (C) 2015, 2016, 2017 "IoT.bzh"
+ * Author José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#define NO_PLUGIN_VERBOSE_MACRO
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <endian.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <pthread.h>
+
+#include <json-c/json.h>
+#include <systemd/sd-event.h>
+
+#include "afb-common.h"
+
+#include "afb-ws.h"
+#include "afb-msg-json.h"
+#include "afb-proto-ws.h"
+#include "verbose.h"
+
+struct afb_proto_ws;
+
+/******** implementation of internal binder protocol per api **************/
+/*
+
+This protocol is asymetric: there is a client and a server
+
+The client can require the following actions:
+
+ - call a verb
+
+ - ask for description
+
+The server must reply to the previous actions by
+
+ - answering success or failure of the call
+
+ - answering the required description
+
+The server can also within the context of a call
+
+ - make a subcall
+
+ - subscribe or unsubscribe an event
+
+For the purpose of handling events the server can:
+
+ - create/destroy an event
+
+ - push or brodcast data as an event
+
+*/
+/************** constants for protocol definition *************************/
+
+#define CHAR_FOR_CALL 'C'
+#define CHAR_FOR_ANSWER_SUCCESS 'T'
+#define CHAR_FOR_ANSWER_FAIL 'F'
+#define CHAR_FOR_EVT_BROADCAST '*'
+#define CHAR_FOR_EVT_ADD '+'
+#define CHAR_FOR_EVT_DEL '-'
+#define CHAR_FOR_EVT_PUSH '!'
+#define CHAR_FOR_EVT_SUBSCRIBE 'S'
+#define CHAR_FOR_EVT_UNSUBSCRIBE 'U'
+#define CHAR_FOR_SUBCALL_CALL 'B'
+#define CHAR_FOR_SUBCALL_REPLY 'R'
+#define CHAR_FOR_DESCRIBE 'D'
+#define CHAR_FOR_DESCRIPTION 'd'
+
+/******************* handling subcalls *****************************/
+
+/**
+ * Structure on server side for recording pending
+ * subcalls.
+ */
+struct server_subcall
+{
+ struct server_subcall *next; /**< next subcall for the client */
+ uint32_t subcallid; /**< the subcallid */
+ void (*callback)(void*, int, struct json_object*); /**< callback on completion */
+ void *closure; /**< closure of the callback */
+};
+
+/**
+ * Structure for sending back replies on client side
+ */
+struct afb_proto_ws_subcall
+{
+ struct afb_proto_ws *protows; /**< proto descriptor */
+ void *buffer;
+ uint32_t subcallid; /**< subcallid for the reply */
+};
+
+/*
+ * structure for recording calls on client side
+ */
+struct client_call {
+ struct client_call *next; /* the next call */
+ struct afb_proto_ws *protows; /* the proto_ws */
+ void *request;
+ uint32_t callid; /* the message identifier */
+};
+
+/*
+ * structure for a ws request
+ */
+struct afb_proto_ws_call {
+ struct client_call *next; /* the next call */
+ struct afb_proto_ws *protows; /* the client of the request */
+ uint32_t refcount; /* reference count */
+ uint32_t callid; /* the incoming request callid */
+ char *buffer; /* the incoming buffer */
+};
+
+/*
+ * structure for recording describe requests
+ */
+struct client_describe
+{
+ struct client_describe *next;
+ struct afb_proto_ws *protows;
+ void (*callback)(void*, struct json_object*);
+ void *closure;
+ uint32_t descid;
+};
+
+/*
+ * structure for jobs of describing
+ */
+struct afb_proto_ws_describe
+{
+ struct afb_proto_ws *protows;
+ uint32_t descid;
+};
+
+/******************* proto description for client or servers ******************/
+
+struct afb_proto_ws
+{
+ /* count of references */
+ int refcount;
+
+ /* file descriptor */
+ int fd;
+
+ /* resource control */
+ pthread_mutex_t mutex;
+
+ /* websocket */
+ struct afb_ws *ws;
+
+ /* the client closure */
+ void *closure;
+
+ /* the client side interface */
+ const struct afb_proto_ws_client_itf *client_itf;
+
+ /* the server side interface */
+ const struct afb_proto_ws_server_itf *server_itf;
+
+ /* emitted calls (client side) */
+ struct client_call *calls;
+
+ /* pending subcalls (server side) */
+ struct server_subcall *subcalls;
+
+ /* pending description (client side) */
+ struct client_describe *describes;
+
+ /* on hangup callback */
+ void (*on_hangup)(void *closure);
+};
+
+/******************* common useful tools **********************************/
+
+/**
+ * translate a pointer to some integer
+ * @param ptr the pointer to translate
+ * @return an integer
+ */
+static inline uint32_t ptr2id(void *ptr)
+{
+ return (uint32_t)(((intptr_t)ptr) >> 6);
+}
+
+/******************* serialisation part **********************************/
+
+struct readbuf
+{
+ char *base, *head, *end;
+};
+
+#define WRITEBUF_COUNT_MAX 32
+struct writebuf
+{
+ struct iovec iovec[WRITEBUF_COUNT_MAX];
+ uint32_t uints[WRITEBUF_COUNT_MAX];
+ int count;
+};
+
+static char *readbuf_get(struct readbuf *rb, uint32_t length)
+{
+ char *before = rb->head;
+ char *after = before + length;
+ if (after > rb->end)
+ return 0;
+ rb->head = after;
+ return before;
+}
+
+static int readbuf_char(struct readbuf *rb, char *value)
+{
+ if (rb->head >= rb->end)
+ return 0;
+ *value = *rb->head++;
+ return 1;
+}
+
+static int readbuf_uint32(struct readbuf *rb, uint32_t *value)
+{
+ char *after = rb->head + sizeof *value;
+ if (after > rb->end)
+ return 0;
+ memcpy(value, rb->head, sizeof *value);
+ rb->head = after;
+ *value = le32toh(*value);
+ return 1;
+}
+
+static int readbuf_string(struct readbuf *rb, const char **value, size_t *length)
+{
+ uint32_t len;
+ if (!readbuf_uint32(rb, &len) || !len)
+ return 0;
+ if (length)
+ *length = (size_t)(len - 1);
+ return (*value = readbuf_get(rb, len)) != NULL && rb->head[-1] == 0;
+}
+
+static int readbuf_object(struct readbuf *rb, struct json_object **object)
+{
+ const char *string;
+ struct json_object *o;
+ int rc = readbuf_string(rb, &string, NULL);
+ if (rc) {
+ o = json_tokener_parse(string);
+ if (o == NULL && strcmp(string, "null"))
+ o = json_object_new_string(string);
+ *object = o;
+ }
+ return rc;
+}
+
+static int writebuf_put(struct writebuf *wb, const void *value, size_t length)
+{
+ int i = wb->count;
+ if (i == WRITEBUF_COUNT_MAX)
+ return 0;
+ wb->iovec[i].iov_base = (void*)value;
+ wb->iovec[i].iov_len = length;
+ wb->count = i + 1;
+ return 1;
+}
+
+static int writebuf_char(struct writebuf *wb, char value)
+{
+ int i = wb->count;
+ if (i == WRITEBUF_COUNT_MAX)
+ return 0;
+ *(char*)&wb->uints[i] = value;
+ wb->iovec[i].iov_base = &wb->uints[i];
+ wb->iovec[i].iov_len = 1;
+ wb->count = i + 1;
+ return 1;
+}
+
+static int writebuf_uint32(struct writebuf *wb, uint32_t value)
+{
+ int i = wb->count;
+ if (i == WRITEBUF_COUNT_MAX)
+ return 0;
+ wb->uints[i] = htole32(value);
+ wb->iovec[i].iov_base = &wb->uints[i];
+ wb->iovec[i].iov_len = sizeof wb->uints[i];
+ wb->count = i + 1;
+ return 1;
+}
+
+static int writebuf_string_length(struct writebuf *wb, const char *value, size_t length)
+{
+ uint32_t len = (uint32_t)++length;
+ return (size_t)len == length && len && writebuf_uint32(wb, len) && writebuf_put(wb, value, length);
+}
+
+static int writebuf_string(struct writebuf *wb, const char *value)
+{
+ return writebuf_string_length(wb, value, strlen(value));
+}
+
+static int writebuf_object(struct writebuf *wb, struct json_object *object)
+{
+ const char *string = json_object_to_json_string_ext(object, JSON_C_TO_STRING_PLAIN);
+ return string != NULL && writebuf_string(wb, string);
+}
+
+/******************* ws request part for server *****************/
+
+void afb_proto_ws_call_addref(struct afb_proto_ws_call *call)
+{
+ __atomic_add_fetch(&call->refcount, 1, __ATOMIC_RELAXED);
+}
+
+void afb_proto_ws_call_unref(struct afb_proto_ws_call *call)
+{
+ if (__atomic_sub_fetch(&call->refcount, 1, __ATOMIC_RELAXED))
+ return;
+
+ afb_proto_ws_unref(call->protows);
+ free(call->buffer);
+ free(call);
+}
+
+int afb_proto_ws_call_success(struct afb_proto_ws_call *call, struct json_object *obj, const char *info)
+{
+ int rc = -1;
+ struct writebuf wb = { .count = 0 };
+
+ if (writebuf_char(&wb, CHAR_FOR_ANSWER_SUCCESS)
+ && writebuf_uint32(&wb, call->callid)
+ && writebuf_string(&wb, info ?: "")
+ && writebuf_object(&wb, obj)) {
+ rc = afb_ws_binary_v(call->protows->ws, wb.iovec, wb.count);
+ if (rc >= 0) {
+ rc = 0;
+ goto success;
+ }
+ }
+ ERROR("error while sending success");
+success:
+ return rc;
+}
+
+int afb_proto_ws_call_fail(struct afb_proto_ws_call *call, const char *status, const char *info)
+{
+ int rc = -1;
+ struct writebuf wb = { .count = 0 };
+
+ if (writebuf_char(&wb, CHAR_FOR_ANSWER_FAIL)
+ && writebuf_uint32(&wb, call->callid)
+ && writebuf_string(&wb, status)
+ && writebuf_string(&wb, info ? : "")) {
+ rc = afb_ws_binary_v(call->protows->ws, wb.iovec, wb.count);
+ if (rc >= 0) {
+ rc = 0;
+ goto success;
+ }
+ }
+ ERROR("error while sending fail");
+success:
+ return rc;
+}
+
+int afb_proto_ws_call_subcall(struct afb_proto_ws_call *call, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
+{
+ int rc = -1;
+ struct writebuf wb = { .count = 0 };
+ struct server_subcall *sc, *osc;
+ struct afb_proto_ws *protows = call->protows;
+
+ sc = malloc(sizeof *sc);
+ if (!sc)
+ errno = ENOMEM;
+ else {
+ sc->callback = callback;
+ sc->closure = cb_closure;
+
+ pthread_mutex_unlock(&protows->mutex);
+ sc->subcallid = ptr2id(sc);
+ do {
+ sc->subcallid++;
+ osc = protows->subcalls;
+ while(osc && osc->subcallid != sc->subcallid)
+ osc = osc->next;
+ } while (osc);
+ sc->next = protows->subcalls;
+ protows->subcalls = sc;
+ pthread_mutex_unlock(&protows->mutex);
+
+ if (writebuf_char(&wb, CHAR_FOR_SUBCALL_CALL)
+ && writebuf_uint32(&wb, sc->subcallid)
+ && writebuf_uint32(&wb, call->callid)
+ && writebuf_string(&wb, api)
+ && writebuf_string(&wb, verb)
+ && writebuf_object(&wb, args)) {
+ rc = afb_ws_binary_v(protows->ws, wb.iovec, wb.count);
+ if (rc >= 0) {
+ rc = 0;
+ goto success;
+ }
+ }
+ }
+ ERROR("error while sending subcall");
+success:
+ return rc;
+}
+
+int afb_proto_ws_call_subscribe(struct afb_proto_ws_call *call, const char *event_name, int event_id)
+{
+ int rc = -1;
+ struct writebuf wb = { .count = 0 };
+
+ if (writebuf_char(&wb, CHAR_FOR_EVT_SUBSCRIBE)
+ && writebuf_uint32(&wb, call->callid)
+ && writebuf_uint32(&wb, (uint32_t)event_id)
+ && writebuf_string(&wb, event_name)) {
+ rc = afb_ws_binary_v(call->protows->ws, wb.iovec, wb.count);
+ if (rc >= 0) {
+ rc = 0;
+ goto success;
+ }
+ }
+ ERROR("error while subscribing event");
+success:
+ return rc;
+}
+
+int afb_proto_ws_call_unsubscribe(struct afb_proto_ws_call *call, const char *event_name, int event_id)
+{
+ int rc = -1;
+ struct writebuf wb = { .count = 0 };
+
+ if (writebuf_char(&wb, CHAR_FOR_EVT_UNSUBSCRIBE)
+ && writebuf_uint32(&wb, call->callid)
+ && writebuf_uint32(&wb, (uint32_t)event_id)
+ && writebuf_string(&wb, event_name)) {
+ rc = afb_ws_binary_v(call->protows->ws, wb.iovec, wb.count);
+ if (rc >= 0) {
+ rc = 0;
+ goto success;
+ }
+ }
+ ERROR("error while subscribing event");
+success:
+ return rc;
+}
+
+/******************* client part **********************************/
+
+/* search a memorized call */
+static struct client_call *client_call_search(struct afb_proto_ws *protows, uint32_t callid)
+{
+ struct client_call *call;
+
+ call = protows->calls;
+ while (call != NULL && call->callid != callid)
+ call = call->next;
+
+ return call;
+}
+
+/* free and release the memorizing call */
+static void client_call_destroy(struct client_call *call)
+{
+ struct client_call **prv;
+
+ prv = &call->protows->calls;
+ while (*prv != NULL) {
+ if (*prv == call) {
+ *prv = call->next;
+ break;
+ }
+ prv = &(*prv)->next;
+ }
+ free(call);
+}
+
+/* get event data from the message */
+static int client_msg_event_read(struct readbuf *rb, uint32_t *eventid, const char **name)
+{
+ return readbuf_uint32(rb, eventid) && readbuf_string(rb, name, NULL);
+}
+
+/* get event from the message */
+static int client_msg_call_get(struct afb_proto_ws *protows, struct readbuf *rb, struct client_call **call)
+{
+ uint32_t callid;
+
+ /* get event data from the message */
+ if (!readbuf_uint32(rb, &callid)) {
+ ERROR("Invalid message");
+ return 0;
+ }
+
+ /* get the call */
+ *call = client_call_search(protows, callid);
+ if (*call == NULL) {
+ ERROR("message not found");
+ return 0;
+ }
+
+ return 1;
+}
+
+/* adds an event */
+static void client_on_event_create(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ const char *event_name;
+ uint32_t event_id;
+
+ if (protows->client_itf->on_event_create && client_msg_event_read(rb, &event_id, &event_name))
+ protows->client_itf->on_event_create(protows->closure, event_name, (int)event_id);
+}
+
+/* removes an event */
+static void client_on_event_remove(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ const char *event_name;
+ uint32_t event_id;
+
+ if (protows->client_itf->on_event_remove && client_msg_event_read(rb, &event_id, &event_name))
+ protows->client_itf->on_event_remove(protows->closure, event_name, (int)event_id);
+}
+
+/* subscribes an event */
+static void client_on_event_subscribe(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ const char *event_name;
+ uint32_t event_id;
+ struct client_call *call;
+
+ if (protows->client_itf->on_event_subscribe && client_msg_call_get(protows, rb, &call) && client_msg_event_read(rb, &event_id, &event_name))
+ protows->client_itf->on_event_subscribe(protows->closure, call->request, event_name, (int)event_id);
+}
+
+/* unsubscribes an event */
+static void client_on_event_unsubscribe(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ const char *event_name;
+ uint32_t event_id;
+ struct client_call *call;
+
+ if (protows->client_itf->on_event_unsubscribe && client_msg_call_get(protows, rb, &call) && client_msg_event_read(rb, &event_id, &event_name))
+ protows->client_itf->on_event_unsubscribe(protows->closure, call->request, event_name, (int)event_id);
+}
+
+/* receives broadcasted events */
+static void client_on_event_broadcast(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ const char *event_name;
+ struct json_object *object;
+
+ if (protows->client_itf->on_event_broadcast && readbuf_string(rb, &event_name, NULL) && readbuf_object(rb, &object))
+ protows->client_itf->on_event_broadcast(protows->closure, event_name, object);
+}
+
+/* pushs an event */
+static void client_on_event_push(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ const char *event_name;
+ uint32_t event_id;
+ struct json_object *object;
+
+ if (protows->client_itf->on_event_push && client_msg_event_read(rb, &event_id, &event_name) && readbuf_object(rb, &object))
+ protows->client_itf->on_event_push(protows->closure, event_name, (int)event_id, object);
+}
+
+static void client_on_reply_success(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ struct client_call *call;
+ struct json_object *object;
+ const char *info;
+
+ if (!client_msg_call_get(protows, rb, &call))
+ return;
+
+ if (readbuf_string(rb, &info, NULL) && readbuf_object(rb, &object)) {
+ protows->client_itf->on_reply_success(protows->closure, call->request, object, info);
+ } else {
+ protows->client_itf->on_reply_fail(protows->closure, call->request, "proto-error", "can't process success");
+ }
+ client_call_destroy(call);
+}
+
+static void client_on_reply_fail(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ struct client_call *call;
+ const char *info, *status;
+
+ if (!client_msg_call_get(protows, rb, &call))
+ return;
+
+ if (readbuf_string(rb, &status, NULL) && readbuf_string(rb, &info, NULL)) {
+ protows->client_itf->on_reply_fail(protows->closure, call->request, status, info);
+ } else {
+ protows->client_itf->on_reply_fail(protows->closure, call->request, "proto-error", "can't process fail");
+ }
+ client_call_destroy(call);
+}
+
+/* send a subcall reply */
+static int client_send_subcall_reply(struct afb_proto_ws *protows, uint32_t subcallid, int status, json_object *object)
+{
+ struct writebuf wb = { .count = 0 };
+ char ie = status < 0;
+
+ return -!(writebuf_char(&wb, CHAR_FOR_SUBCALL_REPLY)
+ && writebuf_uint32(&wb, subcallid)
+ && writebuf_char(&wb, ie)
+ && writebuf_object(&wb, object)
+ && afb_ws_binary_v(protows->ws, wb.iovec, wb.count) >= 0);
+}
+
+/* callback for subcall reply */
+int afb_proto_ws_subcall_reply(struct afb_proto_ws_subcall *subcall, int status, struct json_object *result)
+{
+ int rc = client_send_subcall_reply(subcall->protows, subcall->subcallid, status, result);
+ afb_proto_ws_unref(subcall->protows);
+ free(subcall->buffer);
+ free(subcall);
+ return rc;
+}
+
+/* received a subcall request */
+static void client_on_subcall(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ struct afb_proto_ws_subcall *subcall;
+ struct client_call *call;
+ const char *api, *verb;
+ uint32_t subcallid;
+ struct json_object *object;
+
+ /* get the subcallid */
+ if (!readbuf_uint32(rb, &subcallid))
+ return;
+
+ /* if not expected drop it */
+ if (!protows->client_itf->on_subcall)
+ goto error;
+
+ /* retrieve the message data */
+ if (!client_msg_call_get(protows, rb, &call))
+ goto error;
+
+ /* allocation of the subcall */
+ subcall = malloc(sizeof *subcall);
+ if (!subcall)
+ goto error;
+
+ /* make the call */
+ if (readbuf_string(rb, &api, NULL)
+ && readbuf_string(rb, &verb, NULL)
+ && readbuf_object(rb, &object)) {
+ afb_proto_ws_addref(protows);
+ subcall->protows = protows;
+ subcall->subcallid = subcallid;
+ subcall->buffer = rb->base;
+ rb->base = NULL;
+ protows->client_itf->on_subcall(protows->closure, subcall, call->request, api, verb, object);
+ return;
+ }
+ free(subcall);
+error:
+ client_send_subcall_reply(protows, subcallid, 1, NULL);
+}
+
+static void client_on_description(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ uint32_t descid;
+ struct client_describe *desc, **prv;
+ struct json_object *object;
+
+ if (readbuf_uint32(rb, &descid)) {
+ prv = &protows->describes;
+ while ((desc = *prv) && desc->descid != descid)
+ prv = &desc->next;
+ if (desc) {
+ *prv = desc->next;
+ if (!readbuf_object(rb, &object))
+ object = NULL;
+ desc->callback(desc->closure, object);
+ free(desc);
+ }
+ }
+}
+
+/* callback when receiving binary data */
+static void client_on_binary(void *closure, char *data, size_t size)
+{
+ struct afb_proto_ws *protows;
+ struct readbuf rb;
+
+ rb.base = data;
+ if (size > 0) {
+ rb.head = data;
+ rb.end = data + size;
+ protows = closure;
+
+ pthread_mutex_lock(&protows->mutex);
+ switch (*rb.head++) {
+ case CHAR_FOR_ANSWER_SUCCESS: /* success */
+ client_on_reply_success(protows, &rb);
+ break;
+ case CHAR_FOR_ANSWER_FAIL: /* fail */
+ client_on_reply_fail(protows, &rb);
+ break;
+ case CHAR_FOR_EVT_BROADCAST: /* broadcast */
+ client_on_event_broadcast(protows, &rb);
+ break;
+ case CHAR_FOR_EVT_ADD: /* creates the event */
+ client_on_event_create(protows, &rb);
+ break;
+ case CHAR_FOR_EVT_DEL: /* removes the event */
+ client_on_event_remove(protows, &rb);
+ break;
+ case CHAR_FOR_EVT_PUSH: /* pushs the event */
+ client_on_event_push(protows, &rb);
+ break;
+ case CHAR_FOR_EVT_SUBSCRIBE: /* subscribe event for a request */
+ client_on_event_subscribe(protows, &rb);
+ break;
+ case CHAR_FOR_EVT_UNSUBSCRIBE: /* unsubscribe event for a request */
+ client_on_event_unsubscribe(protows, &rb);
+ break;
+ case CHAR_FOR_SUBCALL_CALL: /* subcall */
+ client_on_subcall(protows, &rb);
+ break;
+ case CHAR_FOR_DESCRIPTION: /* description */
+ client_on_description(protows, &rb);
+ break;
+ default: /* unexpected message */
+ /* TODO: close the connection */
+ break;
+ }
+ pthread_mutex_unlock(&protows->mutex);
+ }
+ free(rb.base);
+}
+
+int afb_proto_ws_client_call(
+ struct afb_proto_ws *protows,
+ const char *verb,
+ struct json_object *args,
+ const char *sessionid,
+ void *request
+)
+{
+ int rc = -1;
+ struct client_call *call;
+ struct writebuf wb = { .count = 0 };
+
+ /* allocate call data */
+ call = malloc(sizeof *call);
+ if (call == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+ call->request = request;
+
+ /* init call data */
+ pthread_mutex_lock(&protows->mutex);
+ call->callid = ptr2id(call);
+ while(client_call_search(protows, call->callid) != NULL)
+ call->callid++;
+ call->protows = protows;
+ call->next = protows->calls;
+ protows->calls = call;
+
+ /* creates the call message */
+ if (!writebuf_char(&wb, CHAR_FOR_CALL)
+ || !writebuf_uint32(&wb, call->callid)
+ || !writebuf_string(&wb, verb)
+ || !writebuf_string(&wb, sessionid)
+ || !writebuf_object(&wb, args)) {
+ errno = EINVAL;
+ goto clean;
+ }
+
+ /* send */
+ rc = afb_ws_binary_v(protows->ws, wb.iovec, wb.count);
+ if (rc >= 0) {
+ rc = 0;
+ goto end;
+ }
+
+clean:
+ client_call_destroy(call);
+end:
+ pthread_mutex_unlock(&protows->mutex);
+ return rc;
+}
+
+/* get the description */
+int afb_proto_ws_client_describe(struct afb_proto_ws *protows, void (*callback)(void*, struct json_object*), void *closure)
+{
+ struct client_describe *desc, *d;
+ struct writebuf wb = { .count = 0 };
+
+ desc = malloc(sizeof *desc);
+ if (!desc) {
+ errno = ENOMEM;
+ goto error;
+ }
+
+ /* fill in stack the description of the task */
+ pthread_mutex_lock(&protows->mutex);
+ desc->descid = ptr2id(desc);
+ d = protows->describes;
+ while (d) {
+ if (d->descid != desc->descid)
+ d = d->next;
+ else {
+ desc->descid++;
+ d = protows->describes;
+ }
+ }
+ desc->callback = callback;
+ desc->closure = closure;
+ desc->protows = protows;
+ desc->next = protows->describes;
+ protows->describes = desc;
+ pthread_mutex_unlock(&protows->mutex);
+
+ /* send */
+ if (writebuf_char(&wb, CHAR_FOR_DESCRIBE)
+ && writebuf_uint32(&wb, desc->descid)
+ && afb_ws_binary_v(protows->ws, wb.iovec, wb.count) >= 0)
+ return 0;
+
+ pthread_mutex_lock(&protows->mutex);
+ d = protows->describes;
+ if (d == desc)
+ protows->describes = desc->next;
+ else {
+ while(d && d->next != desc)
+ d = d->next;
+ if (d)
+ d->next = desc->next;
+ }
+ free(desc);
+ pthread_mutex_unlock(&protows->mutex);
+error:
+ /* TODO? callback(closure, NULL); */
+ return -1;
+}
+
+/******************* client description part for server *****************************/
+
+/* on call, propagate it to the ws service */
+static void server_on_call(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ struct afb_proto_ws_call *call;
+ const char *uuid, *verb;
+ uint32_t callid;
+ size_t lenverb;
+ struct json_object *object;
+
+ afb_proto_ws_addref(protows);
+
+ /* reads the call message data */
+ if (!readbuf_uint32(rb, &callid)
+ || !readbuf_string(rb, &verb, &lenverb)
+ || !readbuf_string(rb, &uuid, NULL)
+ || !readbuf_object(rb, &object))
+ goto overflow;
+
+ /* create the request */
+ call = malloc(sizeof *call);
+ if (call == NULL)
+ goto out_of_memory;
+
+ call->protows = protows;
+ call->callid = callid;
+ call->refcount = 1;
+ call->buffer = rb->base;
+ rb->base = NULL; /* don't free the buffer */
+
+ protows->server_itf->on_call(protows->closure, call, verb, object, uuid);
+ return;
+
+out_of_memory:
+ json_object_put(object);
+
+overflow:
+ afb_proto_ws_unref(protows);
+}
+
+/* on subcall reply */
+static void server_on_subcall_reply(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ char ie;
+ uint32_t subcallid;
+ struct json_object *object;
+ struct server_subcall *sc, **psc;
+
+ /* reads the call message data */
+ if (!readbuf_uint32(rb, &subcallid)
+ || !readbuf_char(rb, &ie)
+ || !readbuf_object(rb, &object)) {
+ /* TODO bad protocol */
+ return;
+ }
+
+ /* search the subcall and unlink it */
+ pthread_mutex_lock(&protows->mutex);
+ psc = &protows->subcalls;
+ while ((sc = *psc) && sc->subcallid != subcallid)
+ psc = &sc->next;
+ if (!sc) {
+ pthread_mutex_unlock(&protows->mutex);
+ json_object_put(object);
+ /* TODO subcall not found */
+ } else {
+ *psc = sc->next;
+ pthread_mutex_unlock(&protows->mutex);
+ sc->callback(sc->closure, -(int)ie, object);
+ free(sc);
+ }
+}
+
+static int server_send_description(struct afb_proto_ws *protows, uint32_t descid, struct json_object *descobj)
+{
+ struct writebuf wb = { .count = 0 };
+
+ return -!(writebuf_char(&wb, CHAR_FOR_DESCRIPTION)
+ && writebuf_uint32(&wb, descid)
+ && writebuf_object(&wb, descobj)
+ && afb_ws_binary_v(protows->ws, wb.iovec, wb.count) >= 0);
+}
+
+int afb_proto_ws_describe_put(struct afb_proto_ws_describe *describe, struct json_object *description)
+{
+ int rc = server_send_description(describe->protows, describe->descid, description);
+ afb_proto_ws_addref(describe->protows);
+ free(describe);
+ return rc;
+}
+
+/* on describe, propagate it to the ws service */
+static void server_on_describe(struct afb_proto_ws *protows, struct readbuf *rb)
+{
+ uint32_t descid;
+ struct afb_proto_ws_describe *desc;
+
+ /* reads the descid */
+ if (readbuf_uint32(rb, &descid)) {
+ if (protows->server_itf->on_describe) {
+ /* create asynchronous job */
+ desc = malloc(sizeof *desc);
+ if (desc) {
+ desc->descid = descid;
+ desc->protows = protows;
+ afb_proto_ws_addref(protows);
+ protows->server_itf->on_describe(protows->closure, desc);
+ return;
+ }
+ }
+ server_send_description(protows, descid, NULL);
+ }
+}
+
+/* callback when receiving binary data */
+static void server_on_binary(void *closure, char *data, size_t size)
+{
+ struct afb_proto_ws *protows;
+ struct readbuf rb;
+
+ rb.base = data;
+ if (size > 0) {
+ rb.head = data;
+ rb.end = data + size;
+ protows = closure;
+
+ switch (*rb.head++) {
+ case CHAR_FOR_CALL:
+ server_on_call(protows, &rb);
+ break;
+ case CHAR_FOR_SUBCALL_REPLY:
+ server_on_subcall_reply(protows, &rb);
+ break;
+ case CHAR_FOR_DESCRIBE:
+ server_on_describe(protows, &rb);
+ break;
+ default: /* unexpected message */
+ /* TODO: close the connection */
+ break;
+ }
+ }
+ free(rb.base);
+}
+
+/******************* server part: manage events **********************************/
+
+static int server_event_send(struct afb_proto_ws *protows, char order, const char *event_name, int event_id, struct json_object *data)
+{
+ struct writebuf wb = { .count = 0 };
+
+ return -!(writebuf_char(&wb, order)
+ && (order == CHAR_FOR_EVT_BROADCAST || writebuf_uint32(&wb, event_id))
+ && writebuf_string(&wb, event_name)
+ && (order == CHAR_FOR_EVT_ADD || order == CHAR_FOR_EVT_DEL || writebuf_object(&wb, data))
+ && afb_ws_binary_v(protows->ws, wb.iovec, wb.count) >= 0);
+}
+
+int afb_proto_ws_server_event_create(struct afb_proto_ws *protows, const char *event_name, int event_id)
+{
+ return server_event_send(protows, CHAR_FOR_EVT_ADD, event_name, event_id, NULL);
+}
+
+int afb_proto_ws_server_event_remove(struct afb_proto_ws *protows, const char *event_name, int event_id)
+{
+ return server_event_send(protows, CHAR_FOR_EVT_DEL, event_name, event_id, NULL);
+}
+
+int afb_proto_ws_server_event_push(struct afb_proto_ws *protows, const char *event_name, int event_id, struct json_object *data)
+{
+ return server_event_send(protows, CHAR_FOR_EVT_PUSH, event_name, event_id, data);
+}
+
+int afb_proto_ws_server_event_broadcast(struct afb_proto_ws *protows, const char *event_name, struct json_object *data)
+{
+ return server_event_send(protows, CHAR_FOR_EVT_BROADCAST, event_name, 0, data);
+}
+
+/*****************************************************/
+
+/* callback when receiving a hangup */
+static void on_hangup(void *closure)
+{
+ struct afb_proto_ws *protows = closure;
+ struct server_subcall *sc, *nsc;
+ struct client_describe *cd, *ncd;
+
+ nsc = protows->subcalls;
+ while (nsc) {
+ sc= nsc;
+ nsc = sc->next;
+ sc->callback(sc->closure, 1, NULL);
+ free(sc);
+ }
+
+ ncd = protows->describes;
+ while (ncd) {
+ cd= ncd;
+ ncd = cd->next;
+ cd->callback(cd->closure, NULL);
+ free(cd);
+ }
+
+ if (protows->fd >= 0) {
+ protows->fd = -1;
+ if (protows->on_hangup)
+ protows->on_hangup(protows->closure);
+ }
+}
+
+/*****************************************************/
+
+static const struct afb_ws_itf proto_ws_client_ws_itf =
+{
+ .on_close = NULL,
+ .on_text = NULL,
+ .on_binary = client_on_binary,
+ .on_error = NULL,
+ .on_hangup = on_hangup
+};
+
+static const struct afb_ws_itf server_ws_itf =
+{
+ .on_close = NULL,
+ .on_text = NULL,
+ .on_binary = server_on_binary,
+ .on_error = NULL,
+ .on_hangup = on_hangup
+};
+
+/*****************************************************/
+
+static struct afb_proto_ws *afb_proto_ws_create(int fd, const struct afb_proto_ws_server_itf *itfs, const struct afb_proto_ws_client_itf *itfc, void *closure, const struct afb_ws_itf *itf)
+{
+ struct afb_proto_ws *protows;
+
+ protows = calloc(1, sizeof *protows);
+ if (protows == NULL)
+ errno = ENOMEM;
+ else {
+ fcntl(fd, F_SETFD, FD_CLOEXEC);
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ protows->ws = afb_ws_create(afb_common_get_event_loop(), fd, itf, protows);
+ if (protows->ws != NULL) {
+ protows->fd = fd;
+ protows->refcount = 1;
+ protows->subcalls = NULL;
+ protows->closure = closure;
+ protows->server_itf = itfs;
+ protows->client_itf = itfc;
+ pthread_mutex_init(&protows->mutex, NULL);
+ return protows;
+ }
+ free(protows);
+ }
+ return NULL;
+}
+
+struct afb_proto_ws *afb_proto_ws_create_client(int fd, const struct afb_proto_ws_client_itf *itf, void *closure)
+{
+ return afb_proto_ws_create(fd, NULL, itf, closure, &proto_ws_client_ws_itf);
+}
+
+struct afb_proto_ws *afb_proto_ws_create_server(int fd, const struct afb_proto_ws_server_itf *itf, void *closure)
+{
+ return afb_proto_ws_create(fd, itf, NULL, closure, &server_ws_itf);
+}
+
+void afb_proto_ws_unref(struct afb_proto_ws *protows)
+{
+ if (!__atomic_sub_fetch(&protows->refcount, 1, __ATOMIC_RELAXED)) {
+ afb_proto_ws_hangup(protows);
+ afb_ws_destroy(protows->ws);
+ pthread_mutex_destroy(&protows->mutex);
+ free(protows);
+ }
+}
+
+void afb_proto_ws_addref(struct afb_proto_ws *protows)
+{
+ __atomic_add_fetch(&protows->refcount, 1, __ATOMIC_RELAXED);
+}
+
+int afb_proto_ws_is_client(struct afb_proto_ws *protows)
+{
+ return !!protows->client_itf;
+}
+
+int afb_proto_ws_is_server(struct afb_proto_ws *protows)
+{
+ return !!protows->server_itf;
+}
+
+void afb_proto_ws_hangup(struct afb_proto_ws *protows)
+{
+ afb_ws_hangup(protows->ws);
+}
+
+void afb_proto_ws_on_hangup(struct afb_proto_ws *protows, void (*on_hangup)(void *closure))
+{
+ protows->on_hangup = on_hangup;
+}
+
#include "afb-session.h"
#include "afb-cred.h"
-#include "afb-ws.h"
-#include "afb-msg-json.h"
#include "afb-api.h"
#include "afb-apiset.h"
+#include "afb-proto-ws.h"
#include "afb-stub-ws.h"
#include "afb-context.h"
#include "afb-evt.h"
struct afb_stub_ws;
-/************** constants for protocol definition *************************/
-
-#define CHAR_FOR_CALL 'C'
-#define CHAR_FOR_ANSWER_SUCCESS 'T'
-#define CHAR_FOR_ANSWER_FAIL 'F'
-#define CHAR_FOR_EVT_BROADCAST '*'
-#define CHAR_FOR_EVT_ADD '+'
-#define CHAR_FOR_EVT_DEL '-'
-#define CHAR_FOR_EVT_PUSH '!'
-#define CHAR_FOR_EVT_SUBSCRIBE 'S'
-#define CHAR_FOR_EVT_UNSUBSCRIBE 'U'
-#define CHAR_FOR_SUBCALL_CALL 'B'
-#define CHAR_FOR_SUBCALL_REPLY 'R'
-#define CHAR_FOR_DESCRIBE 'D'
-#define CHAR_FOR_DESCRIPTION 'd'
/******************* handling subcalls *****************************/
struct server_req {
struct afb_xreq xreq; /* the xreq */
struct afb_stub_ws *stubws; /* the client of the request */
- uint32_t msgid; /* the incoming request msgid */
+ struct afb_proto_ws_call *call; /* the incoming call */
};
/*
*/
struct client_describe
{
- struct client_describe *next;
struct afb_stub_ws *stubws;
struct jobloop *jobloop;
struct json_object *result;
- uint32_t descid;
};
/*
struct server_describe
{
struct afb_stub_ws *stubws;
- uint32_t descid;
+ struct afb_proto_ws_describe *describe;
};
/******************* stub description for client or servers ******************/
/* count of references */
int refcount;
- /* file descriptor */
- int fd;
-
/* resource control */
pthread_mutex_t mutex;
- /* websocket */
- struct afb_ws *ws;
+ /* protocol */
+ struct afb_proto_ws *proto;
/* listener for events (server side) */
struct afb_evt_listener *listener;
/* event replica (client side) */
struct client_event *events;
- /* emitted calls (client side) */
- struct client_call *calls;
-
/* credentials (server side) */
struct afb_cred *cred;
- /* pending subcalls (server side) */
- struct server_subcall *subcalls;
-
- /* pending description (client side) */
- struct client_describe *describes;
-
/* apiset */
struct afb_apiset *apiset;
char apiname[1];
};
-/******************* common useful tools **********************************/
-
-/**
- * translate a pointer to some integer
- * @param ptr the pointer to translate
- * @return an integer
- */
-static inline uint32_t ptr2id(void *ptr)
-{
- return (uint32_t)(((intptr_t)ptr) >> 6);
-}
-
-/******************* serialisation part **********************************/
-
-struct readbuf
-{
- char *head, *end;
-};
-
-#define WRITEBUF_COUNT_MAX 32
-struct writebuf
-{
- struct iovec iovec[WRITEBUF_COUNT_MAX];
- uint32_t uints[WRITEBUF_COUNT_MAX];
- int count;
-};
-
-static char *readbuf_get(struct readbuf *rb, uint32_t length)
-{
- char *before = rb->head;
- char *after = before + length;
- if (after > rb->end)
- return 0;
- rb->head = after;
- return before;
-}
-
-static int readbuf_char(struct readbuf *rb, char *value)
-{
- if (rb->head >= rb->end)
- return 0;
- *value = *rb->head++;
- return 1;
-}
-
-static int readbuf_uint32(struct readbuf *rb, uint32_t *value)
-{
- char *after = rb->head + sizeof *value;
- if (after > rb->end)
- return 0;
- memcpy(value, rb->head, sizeof *value);
- rb->head = after;
- *value = le32toh(*value);
- return 1;
-}
-
-static int readbuf_string(struct readbuf *rb, const char **value, size_t *length)
-{
- uint32_t len;
- if (!readbuf_uint32(rb, &len) || !len)
- return 0;
- if (length)
- *length = (size_t)(len - 1);
- return (*value = readbuf_get(rb, len)) != NULL && rb->head[-1] == 0;
-}
-
-static int readbuf_object(struct readbuf *rb, struct json_object **object)
-{
- const char *string;
- struct json_object *o;
- int rc = readbuf_string(rb, &string, NULL);
- if (rc) {
- o = json_tokener_parse(string);
- if (o == NULL && strcmp(string, "null"))
- o = json_object_new_string(string);
- *object = o;
- }
- return rc;
-}
-
-static int writebuf_put(struct writebuf *wb, const void *value, size_t length)
-{
- int i = wb->count;
- if (i == WRITEBUF_COUNT_MAX)
- return 0;
- wb->iovec[i].iov_base = (void*)value;
- wb->iovec[i].iov_len = length;
- wb->count = i + 1;
- return 1;
-}
-
-static int writebuf_char(struct writebuf *wb, char value)
-{
- int i = wb->count;
- if (i == WRITEBUF_COUNT_MAX)
- return 0;
- *(char*)&wb->uints[i] = value;
- wb->iovec[i].iov_base = &wb->uints[i];
- wb->iovec[i].iov_len = 1;
- wb->count = i + 1;
- return 1;
-}
-
-static int writebuf_uint32(struct writebuf *wb, uint32_t value)
-{
- int i = wb->count;
- if (i == WRITEBUF_COUNT_MAX)
- return 0;
- wb->uints[i] = htole32(value);
- wb->iovec[i].iov_base = &wb->uints[i];
- wb->iovec[i].iov_len = sizeof wb->uints[i];
- wb->count = i + 1;
- return 1;
-}
-
-static int writebuf_string_length(struct writebuf *wb, const char *value, size_t length)
-{
- uint32_t len = (uint32_t)++length;
- return (size_t)len == length && len && writebuf_uint32(wb, len) && writebuf_put(wb, value, length);
-}
-
-static int writebuf_string(struct writebuf *wb, const char *value)
-{
- return writebuf_string_length(wb, value, strlen(value));
-}
-
-static int writebuf_object(struct writebuf *wb, struct json_object *object)
-{
- const char *string = json_object_to_json_string_ext(object, JSON_C_TO_STRING_PLAIN);
- return string != NULL && writebuf_string(wb, string);
-}
-
/******************* ws request part for server *****************/
/* decrement the reference count of the request and free/release it on falling to null */
afb_context_disconnect(&wreq->xreq.context);
afb_cred_unref(wreq->xreq.cred);
json_object_put(wreq->xreq.json);
+ afb_proto_ws_call_unref(wreq->call);
afb_stub_ws_unref(wreq->stubws);
free(wreq);
}
static void server_req_success_cb(struct afb_xreq *xreq, struct json_object *obj, const char *info)
{
int rc;
- struct writebuf wb = { .count = 0 };
struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
- if (writebuf_char(&wb, CHAR_FOR_ANSWER_SUCCESS)
- && writebuf_uint32(&wb, wreq->msgid)
- && writebuf_uint32(&wb, (uint32_t)wreq->xreq.context.flags)
- && writebuf_string(&wb, info ? : "")
- && writebuf_object(&wb, obj)) {
- rc = afb_ws_binary_v(wreq->stubws->ws, wb.iovec, wb.count);
- if (rc >= 0)
- goto success;
- }
- ERROR("error while sending success");
-success:
+ rc = afb_proto_ws_call_success(wreq->call, obj, info);
+ if (rc < 0)
+ ERROR("error while sending success");
json_object_put(obj);
}
static void server_req_fail_cb(struct afb_xreq *xreq, const char *status, const char *info)
{
int rc;
- struct writebuf wb = { .count = 0 };
struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
- if (writebuf_char(&wb, CHAR_FOR_ANSWER_FAIL)
- && writebuf_uint32(&wb, wreq->msgid)
- && writebuf_uint32(&wb, (uint32_t)wreq->xreq.context.flags)
- && writebuf_string(&wb, status)
- && writebuf_string(&wb, info ? : "")) {
- rc = afb_ws_binary_v(wreq->stubws->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
- }
- ERROR("error while sending fail");
+ rc = afb_proto_ws_call_fail(wreq->call, status, info);
+ if (rc < 0)
+ ERROR("error while sending fail");
}
static void server_req_subcall_cb(struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
{
int rc;
- struct writebuf wb = { .count = 0 };
- struct server_subcall *sc, *osc;
struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
- struct afb_stub_ws *stubws = wreq->stubws;
-
- sc = malloc(sizeof *sc);
- if (!sc) {
- callback(cb_closure, 1, afb_msg_json_internal_error());
- } else {
- sc->callback = callback;
- sc->closure = cb_closure;
-
- pthread_mutex_unlock(&stubws->mutex);
- sc->subcallid = ptr2id(sc);
- do {
- sc->subcallid++;
- osc = stubws->subcalls;
- while(osc && osc->subcallid != sc->subcallid)
- osc = osc->next;
- } while (osc);
- sc->next = stubws->subcalls;
- stubws->subcalls = sc;
- pthread_mutex_unlock(&stubws->mutex);
-
- if (writebuf_char(&wb, CHAR_FOR_SUBCALL_CALL)
- && writebuf_uint32(&wb, wreq->msgid)
- && writebuf_uint32(&wb, sc->subcallid)
- && writebuf_string(&wb, api)
- && writebuf_string(&wb, verb)
- && writebuf_object(&wb, args)) {
- rc = afb_ws_binary_v(wreq->stubws->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
- }
- ERROR("error while sending fail");
- }
+
+ rc = afb_proto_ws_call_subcall(wreq->call, api, verb, args, callback, cb_closure);
+ if (rc < 0)
+ ERROR("error while sending subcall");
}
static int server_req_subscribe_cb(struct afb_xreq *xreq, struct afb_event event)
{
- int rc, rc2;
- struct writebuf wb = { .count = 0 };
+ int rc;
struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
rc = afb_evt_add_watch(wreq->stubws->listener, event);
+ if (rc >= 0)
+ rc = afb_proto_ws_call_subscribe(wreq->call, afb_evt_event_name(event), afb_evt_event_id(event));
if (rc < 0)
- return rc;
-
- if (writebuf_char(&wb, CHAR_FOR_EVT_SUBSCRIBE)
- && writebuf_uint32(&wb, wreq->msgid)
- && writebuf_uint32(&wb, (uint32_t)afb_evt_event_id(event))
- && writebuf_string(&wb, afb_evt_event_name(event))) {
- rc2 = afb_ws_binary_v(wreq->stubws->ws, wb.iovec, wb.count);
- if (rc2 >= 0)
- goto success;
- }
- ERROR("error while subscribing event");
-success:
+ ERROR("error while subscribing event");
return rc;
}
static int server_req_unsubscribe_cb(struct afb_xreq *xreq, struct afb_event event)
{
int rc, rc2;
- struct writebuf wb = { .count = 0 };
struct server_req *wreq = CONTAINER_OF_XREQ(struct server_req, xreq);
- if (writebuf_char(&wb, CHAR_FOR_EVT_UNSUBSCRIBE)
- && writebuf_uint32(&wb, wreq->msgid)
- && writebuf_uint32(&wb, (uint32_t)afb_evt_event_id(event))
- && writebuf_string(&wb, afb_evt_event_name(event))) {
- rc2 = afb_ws_binary_v(wreq->stubws->ws, wb.iovec, wb.count);
- if (rc2 >= 0)
- goto success;
- }
- ERROR("error while subscribing event");
-success:
- rc = afb_evt_remove_watch(wreq->stubws->listener, event);
+ rc = afb_proto_ws_call_unsubscribe(wreq->call, afb_evt_event_name(event), afb_evt_event_id(event));
+ rc2 = afb_evt_remove_watch(wreq->stubws->listener, event);
+ if (rc >= 0 && rc2 < 0)
+ rc = rc2;
+ if (rc < 0)
+ ERROR("error while unsubscribing event");
return rc;
}
/******************* client part **********************************/
-/* search a memorized call */
-static struct client_call *client_call_search(struct afb_stub_ws *stubws, uint32_t msgid)
-{
- struct client_call *call;
-
- call = stubws->calls;
- while (call != NULL && call->msgid != msgid)
- call = call->next;
-
- return call;
-}
-
/* search the event */
static struct client_event *client_event_search(struct afb_stub_ws *stubws, uint32_t eventid, const char *name)
{
return ev;
}
+/* on call, propagate it to the ws service */
+static void client_call_cb(void * closure, struct afb_xreq *xreq)
+{
+ struct afb_stub_ws *stubws = closure;
+
+ afb_proto_ws_client_call(stubws->proto, xreq->verb, afb_xreq_json(xreq), afb_session_uuid(xreq->context.session), xreq);
+ afb_xreq_addref(xreq);
+}
-/* allocates and init the memorizing call */
-static struct client_call *client_call_make(struct afb_stub_ws *stubws, struct afb_xreq *xreq)
+static void client_on_description_cb(void *closure, struct json_object *data)
{
- struct client_call *call;
-
- call = malloc(sizeof *call);
- if (call != NULL) {
- afb_xreq_addref(xreq);
- call->xreq = xreq;
- call->msgid = ptr2id(call);
- while(client_call_search(stubws, call->msgid) != NULL)
- call->msgid++;
- call->stubws = stubws;
- call->next = stubws->calls;
- stubws->calls = call;
- }
- return call;
+ struct client_describe *desc = closure;
+
+ desc->result = data;
+ jobs_leave(desc->jobloop);
}
-/* free and release the memorizing call */
-static void client_call_destroy(struct client_call *call)
+static void client_send_describe_cb(int signum, void *closure, struct jobloop *jobloop)
{
- struct client_call **prv;
+ struct client_describe *desc = closure;
- prv = &call->stubws->calls;
- while (*prv != NULL) {
- if (*prv == call) {
- *prv = call->next;
- break;
- }
- prv = &(*prv)->next;
+ if (signum)
+ jobs_leave(jobloop);
+ else {
+ desc->jobloop = jobloop;
+ afb_proto_ws_client_describe(desc->stubws->proto, client_on_description_cb, desc);
}
+}
+
+/* get the description */
+static struct json_object *client_describe_cb(void * closure)
+{
+ struct client_describe desc;
- afb_xreq_unref(call->xreq);
- free(call);
+ /* synchronous job: send the request and wait its result */
+ desc.stubws = closure;
+ desc.result = NULL;
+ jobs_enter(NULL, 0, client_send_describe_cb, &desc);
+ return desc.result;
}
-/* get event data from the message */
-static int client_msg_event_read(struct readbuf *rb, uint32_t *eventid, const char **name)
+/******************* server part: manage events **********************************/
+
+static void server_event_add(void *closure, const char *event, int eventid)
{
- return readbuf_uint32(rb, eventid) && readbuf_string(rb, name, NULL);
+ struct afb_stub_ws *stubws = closure;
+
+ afb_proto_ws_server_event_create(stubws->proto, event, eventid);
}
-/* get event from the message */
-static int client_msg_event_get(struct afb_stub_ws *stubws, struct readbuf *rb, struct client_event **ev)
+static void server_event_remove(void *closure, const char *event, int eventid)
{
- const char *name;
- uint32_t eventid;
+ struct afb_stub_ws *stubws = closure;
- /* get event data from the message */
- if (!client_msg_event_read(rb, &eventid, &name)) {
- ERROR("Invalid message");
- return 0;
- }
+ afb_proto_ws_server_event_remove(stubws->proto, event, eventid);
+}
- /* check conflicts */
- *ev = client_event_search(stubws, eventid, name);
- if (*ev == NULL) {
- ERROR("event %s not found", name);
- return 0;
- }
+static void server_event_push(void *closure, const char *event, int eventid, struct json_object *object)
+{
+ struct afb_stub_ws *stubws = closure;
- return 1;
+ afb_proto_ws_server_event_push(stubws->proto, event, eventid, object);
+ json_object_put(object);
}
-/* get event from the message */
-static int client_msg_call_get(struct afb_stub_ws *stubws, struct readbuf *rb, struct client_call **call)
+static void server_event_broadcast(void *closure, const char *event, int eventid, struct json_object *object)
{
- uint32_t msgid;
+ struct afb_stub_ws *stubws = closure;
- /* get event data from the message */
- if (!readbuf_uint32(rb, &msgid)) {
- ERROR("Invalid message");
- return 0;
- }
+ afb_proto_ws_server_event_broadcast(stubws->proto, event, object);
+ json_object_put(object);
+}
- /* get the call */
- *call = client_call_search(stubws, msgid);
- if (*call == NULL) {
- ERROR("message not found");
- return 0;
- }
+/*****************************************************/
+
+static void on_reply_success(void *closure, void *request, struct json_object *result, const char *info)
+{
+ struct afb_xreq *xreq = request;
- return 1;
+ afb_xreq_success(xreq, result, *info ? info : NULL);
+ afb_xreq_unref(xreq);
}
-/* read a subscrition message */
-static int client_msg_subscription_get(struct afb_stub_ws *stubws, struct readbuf *rb, struct client_call **call, struct client_event **ev)
+static void on_reply_fail(void *closure, void *request, const char *status, const char *info)
{
- return client_msg_call_get(stubws, rb, call) && client_msg_event_get(stubws, rb, ev);
+ struct afb_xreq *xreq = request;
+
+ afb_xreq_fail(xreq, status, *info ? info : NULL);
+ afb_xreq_unref(xreq);
}
-/* adds an event */
-static void client_event_create(struct afb_stub_ws *stubws, struct readbuf *rb)
+static void on_event_create(void *closure, const char *event_name, int event_id)
{
- size_t offset;
- const char *name;
- uint32_t eventid;
+ struct afb_stub_ws *stubws = closure;
struct client_event *ev;
- /* get event data from the message */
- offset = client_msg_event_read(rb, &eventid, &name);
- if (offset == 0) {
- ERROR("Invalid message");
- return;
- }
-
/* check conflicts */
- ev = client_event_search(stubws, eventid, name);
+ ev = client_event_search(stubws, event_id, event_name);
if (ev != NULL) {
ev->refcount++;
return;
/* no conflict, try to add it */
ev = malloc(sizeof *ev);
if (ev != NULL) {
- ev->event = afb_evt_create_event(name);
- if (ev->event.closure == NULL)
- free(ev);
- else {
+ ev->event = afb_evt_create_event(event_name);
+ if (ev->event.closure != NULL) {
ev->refcount = 1;
- ev->eventid = eventid;
+ ev->eventid = event_id;
ev->next = stubws->events;
stubws->events = ev;
return;
}
+ free(ev);
}
- ERROR("can't create event %s, out of memory", name);
+ ERROR("can't create event %s, out of memory", event_name);
}
-/* removes an event */
-static void client_event_drop(struct afb_stub_ws *stubws, struct readbuf *rb)
+static void on_event_remove(void *closure, const char *event_name, int event_id)
{
+ struct afb_stub_ws *stubws = closure;
struct client_event *ev, **prv;
- /* retrieves the event */
- if (!client_msg_event_get(stubws, rb, &ev))
+ /* check conflicts */
+ ev = client_event_search(stubws, event_id, event_name);
+ if (ev == NULL)
return;
/* decrease the reference count */
free(ev);
}
-/* subscribes an event */
-static void client_event_subscribe(struct afb_stub_ws *stubws, struct readbuf *rb)
+static void on_event_subscribe(void *closure, void *request, const char *event_name, int event_id)
{
+ struct afb_stub_ws *stubws = closure;
+ struct afb_xreq *xreq = request;
struct client_event *ev;
- struct client_call *call;
- if (client_msg_subscription_get(stubws, rb, &call, &ev)) {
- /* subscribe the request from the event */
- if (afb_xreq_subscribe(call->xreq, ev->event) < 0)
- ERROR("can't subscribe: %m");
- }
+ /* check conflicts */
+ ev = client_event_search(stubws, event_id, event_name);
+ if (ev == NULL)
+ return;
+
+ if (afb_xreq_subscribe(xreq, ev->event) < 0)
+ ERROR("can't subscribe: %m");
}
-/* unsubscribes an event */
-static void client_event_unsubscribe(struct afb_stub_ws *stubws, struct readbuf *rb)
+static void on_event_unsubscribe(void *closure, void *request, const char *event_name, int event_id)
{
+ struct afb_stub_ws *stubws = closure;
+ struct afb_xreq *xreq = request;
struct client_event *ev;
- struct client_call *call;
- if (client_msg_subscription_get(stubws, rb, &call, &ev)) {
- /* unsubscribe the request from the event */
- if (afb_xreq_unsubscribe(call->xreq, ev->event) < 0)
- ERROR("can't unsubscribe: %m");
- }
-}
-
-/* receives broadcasted events */
-static void client_event_broadcast(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
- struct json_object *object;
- const char *event;
+ /* check conflicts */
+ ev = client_event_search(stubws, event_id, event_name);
+ if (ev == NULL)
+ return;
- if (readbuf_string(rb, &event, NULL) && readbuf_object(rb, &object))
- afb_evt_broadcast(event, object);
- else
- ERROR("unreadable broadcasted event");
+ if (afb_xreq_unsubscribe(xreq, ev->event) < 0)
+ ERROR("can't unsubscribe: %m");
}
-/* pushs an event */
-static void client_event_push(struct afb_stub_ws *stubws, struct readbuf *rb)
+static void on_event_push(void *closure, const char *event_name, int event_id, struct json_object *data)
{
+ struct afb_stub_ws *stubws = closure;
struct client_event *ev;
- struct json_object *object;
- if (client_msg_event_get(stubws, rb, &ev) && readbuf_object(rb, &object))
- afb_event_push(ev->event, object);
+ /* check conflicts */
+ ev = client_event_search(stubws, event_id, event_name);
+ if (ev)
+ afb_event_push(ev->event, data);
else
ERROR("unreadable push event");
}
-static void client_reply_success(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
- struct client_call *call;
- struct json_object *object;
- const char *info;
- uint32_t flags;
-
- /* retrieve the message data */
- if (!client_msg_call_get(stubws, rb, &call))
- return;
-
- if (readbuf_uint32(rb, &flags)
- && readbuf_string(rb, &info, NULL)
- && readbuf_object(rb, &object)) {
- call->xreq->context.flags = (unsigned)flags;
- afb_xreq_success(call->xreq, object, *info ? info : NULL);
- } else {
- /* failing to have the answer */
- afb_xreq_fail(call->xreq, "error", "ws error");
- }
- client_call_destroy(call);
-}
-
-static void client_reply_fail(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
- struct client_call *call;
- const char *info, *status;
- uint32_t flags;
-
- /* retrieve the message data */
- if (!client_msg_call_get(stubws, rb, &call))
- return;
-
- if (readbuf_uint32(rb, &flags)
- && readbuf_string(rb, &status, NULL)
- && readbuf_string(rb, &info, NULL)) {
- call->xreq->context.flags = (unsigned)flags;
- afb_xreq_fail(call->xreq, status, *info ? info : NULL);
- } else {
- /* failing to have the answer */
- afb_xreq_fail(call->xreq, "error", "ws error");
- }
- client_call_destroy(call);
-}
-
-/* send a subcall reply */
-static void client_send_subcall_reply(struct client_subcall *subcall, int status, json_object *object)
+static void on_event_broadcast(void *closure, const char *event_name, struct json_object *data)
{
- int rc;
- struct writebuf wb = { .count = 0 };
- char ie = status < 0;
-
- if (!writebuf_char(&wb, CHAR_FOR_SUBCALL_REPLY)
- || !writebuf_uint32(&wb, subcall->subcallid)
- || !writebuf_char(&wb, ie)
- || !writebuf_object(&wb, object)) {
- /* write error ? */
- return;
- }
-
- rc = afb_ws_binary_v(subcall->stubws->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
- ERROR("error while sending subcall reply");
+ afb_evt_broadcast(event_name, data);
}
-/* callback for subcall reply */
static void client_subcall_reply_cb(void *closure, int status, json_object *object)
{
- client_send_subcall_reply(closure, status, object);
- free(closure);
-}
-
-/* received a subcall request */
-static void client_subcall(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
- struct client_subcall *subcall;
- struct client_call *call;
- const char *api, *verb;
- uint32_t subcallid;
- struct json_object *object;
-
- subcall = malloc(sizeof *subcall);
- if (!subcall)
- return;
-
- /* retrieve the message data */
- if (!client_msg_call_get(stubws, rb, &call))
- return;
-
- if (readbuf_uint32(rb, &subcallid)
- && readbuf_string(rb, &api, NULL)
- && readbuf_string(rb, &verb, NULL)
- && readbuf_object(rb, &object)) {
- subcall->stubws = stubws;
- subcall->subcallid = subcallid;
- afb_xreq_subcall(call->xreq, api, verb, object, client_subcall_reply_cb, subcall);
- }
+ struct afb_proto_ws_subcall *subcall = closure;
+ afb_proto_ws_subcall_reply(subcall, status, object);
}
-/* pushs an event */
-static void client_on_description(struct afb_stub_ws *stubws, struct readbuf *rb)
+static void on_subcall(void *closure, struct afb_proto_ws_subcall *subcall, void *request, const char *api, const char *verb, struct json_object *args)
{
- uint32_t descid;
- struct client_describe *desc;
- struct json_object *object;
-
- if (!readbuf_uint32(rb, &descid))
- ERROR("unreadable description");
- else {
- desc = stubws->describes;
- while (desc && desc->descid != descid)
- desc = desc->next;
- if (desc == NULL)
- ERROR("unexpected description");
- else {
- if (readbuf_object(rb, &object))
- desc->result = object;
- else
- ERROR("bad description");
- jobs_leave(desc->jobloop);
- }
- }
-}
-
-/* callback when receiving binary data */
-static void client_on_binary(void *closure, char *data, size_t size)
-{
- if (size > 0) {
- struct afb_stub_ws *stubws = closure;
- struct readbuf rb = { .head = data, .end = data + size };
-
- pthread_mutex_lock(&stubws->mutex);
- switch (*rb.head++) {
- case CHAR_FOR_ANSWER_SUCCESS: /* success */
- client_reply_success(stubws, &rb);
- break;
- case CHAR_FOR_ANSWER_FAIL: /* fail */
- client_reply_fail(stubws, &rb);
- break;
- case CHAR_FOR_EVT_BROADCAST: /* broadcast */
- client_event_broadcast(stubws, &rb);
- break;
- case CHAR_FOR_EVT_ADD: /* creates the event */
- client_event_create(stubws, &rb);
- break;
- case CHAR_FOR_EVT_DEL: /* drops the event */
- client_event_drop(stubws, &rb);
- break;
- case CHAR_FOR_EVT_PUSH: /* pushs the event */
- client_event_push(stubws, &rb);
- break;
- case CHAR_FOR_EVT_SUBSCRIBE: /* subscribe event for a request */
- client_event_subscribe(stubws, &rb);
- break;
- case CHAR_FOR_EVT_UNSUBSCRIBE: /* unsubscribe event for a request */
- client_event_unsubscribe(stubws, &rb);
- break;
- case CHAR_FOR_SUBCALL_CALL: /* subcall */
- client_subcall(stubws, &rb);
- break;
- case CHAR_FOR_DESCRIPTION: /* description */
- client_on_description(stubws, &rb);
- break;
- default: /* unexpected message */
- /* TODO: close the connection */
- break;
- }
- pthread_mutex_unlock(&stubws->mutex);
- }
- free(data);
-}
-
-/* on call, propagate it to the ws service */
-static void client_call_cb(void * closure, struct afb_xreq *xreq)
-{
- int rc;
- struct client_call *call;
- struct writebuf wb = { .count = 0 };
- const char *raw;
- size_t szraw;
- struct afb_stub_ws *stubws = closure;
-
- pthread_mutex_lock(&stubws->mutex);
-
- /* create the recording data */
- call = client_call_make(stubws, xreq);
- if (call == NULL) {
- afb_xreq_fail_f(xreq, "error", "out of memory");
- goto end;
- }
-
- /* creates the call message */
- raw = afb_xreq_raw(xreq, &szraw);
- if (raw == NULL)
- goto internal_error;
- if (!writebuf_char(&wb, CHAR_FOR_CALL)
- || !writebuf_uint32(&wb, call->msgid)
- || !writebuf_uint32(&wb, (uint32_t)xreq->context.flags)
- || !writebuf_string(&wb, xreq->verb)
- || !writebuf_string(&wb, afb_session_uuid(xreq->context.session))
- || !writebuf_string_length(&wb, raw, szraw))
- goto overflow;
-
- /* send */
- rc = afb_ws_binary_v(stubws->ws, wb.iovec, wb.count);
- if (rc >= 0)
- goto end;
-
- afb_xreq_fail(xreq, "error", "websocket sending error");
- goto clean_call;
+ struct afb_xreq *xreq = request;
-internal_error:
- afb_xreq_fail(xreq, "error", "internal: raw is NULL!");
- goto clean_call;
-
-overflow:
- afb_xreq_fail(xreq, "error", "overflow: size doesn't match 32 bits!");
-
-clean_call:
- client_call_destroy(call);
-end:
- pthread_mutex_unlock(&stubws->mutex);
+ afb_xreq_subcall(xreq, api, verb, args, client_subcall_reply_cb, subcall);
}
-static void client_send_describe_cb(int signum, void *closure, struct jobloop *jobloop)
-{
- struct client_describe *desc = closure;
- struct writebuf wb = { .count = 0 };
-
- if (!signum) {
- /* record the jobloop */
- desc->jobloop = jobloop;
-
- /* send */
- if (writebuf_char(&wb, CHAR_FOR_DESCRIBE)
- && writebuf_uint32(&wb, desc->descid)
- && afb_ws_binary_v(desc->stubws->ws, wb.iovec, wb.count) >= 0)
- return;
- }
- jobs_leave(jobloop);
-}
+/*****************************************************/
-/* get the description */
-static struct json_object *client_describe_cb(void * closure)
+static void on_call(void *closure, struct afb_proto_ws_call *call, const char *verb, struct json_object *args, const char *sessionid)
{
- struct client_describe desc, *d;
struct afb_stub_ws *stubws = closure;
-
- /* fill in stack the description of the task */
- pthread_mutex_lock(&stubws->mutex);
- desc.result = NULL;
- desc.descid = ptr2id(&desc);
- d = stubws->describes;
- while (d) {
- if (d->descid != desc.descid)
- d = d->next;
- else {
- desc.descid++;
- d = stubws->describes;
- }
- }
- desc.stubws = stubws;
- desc.next = stubws->describes;
- stubws->describes = &desc;
- pthread_mutex_unlock(&stubws->mutex);
-
- /* synchronous job: send the request and wait its result */
- jobs_enter(NULL, 0, client_send_describe_cb, &desc);
-
- /* unlink and send the result */
- pthread_mutex_lock(&stubws->mutex);
- d = stubws->describes;
- if (d == &desc)
- stubws->describes = desc.next;
- else {
- while (d) {
- if (d->next != &desc)
- d = d->next;
- else {
- d->next = desc.next;
- d = NULL;
- }
- }
- }
- pthread_mutex_unlock(&stubws->mutex);
- return desc.result;
-}
-
-/******************* client description part for server *****************************/
-
-/* on call, propagate it to the ws service */
-static void server_on_call(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
struct server_req *wreq;
- char *cverb;
- const char *uuid, *verb;
- uint32_t flags, msgid;
- size_t lenverb;
- struct json_object *object;
afb_stub_ws_addref(stubws);
- /* reads the call message data */
- if (!readbuf_uint32(rb, &msgid)
- || !readbuf_uint32(rb, &flags)
- || !readbuf_string(rb, &verb, &lenverb)
- || !readbuf_string(rb, &uuid, NULL)
- || !readbuf_object(rb, &object))
- goto overflow;
-
/* create the request */
- wreq = malloc(++lenverb + sizeof *wreq);
+ wreq = malloc(sizeof *wreq);
if (wreq == NULL)
goto out_of_memory;
afb_xreq_init(&wreq->xreq, &server_req_xreq_itf);
wreq->stubws = stubws;
- wreq->msgid = msgid;
- cverb = (char*)&wreq[1];
- memcpy(cverb, verb, lenverb);
+ wreq->call = call;
/* init the context */
- if (afb_context_connect(&wreq->xreq.context, uuid, NULL) < 0)
+ if (afb_context_connect(&wreq->xreq.context, sessionid, NULL) < 0)
goto unconnected;
- wreq->xreq.context.flags = flags;
/* makes the call */
wreq->xreq.cred = afb_cred_addref(stubws->cred);
wreq->xreq.api = stubws->apiname;
- wreq->xreq.verb = cverb;
- wreq->xreq.json = object;
+ wreq->xreq.verb = verb;
+ wreq->xreq.json = args;
afb_xreq_process(&wreq->xreq, stubws->apiset);
return;
unconnected:
free(wreq);
out_of_memory:
- json_object_put(object);
-overflow:
+ json_object_put(args);
afb_stub_ws_unref(stubws);
+ afb_proto_ws_call_fail(call, "internal-error", NULL);
+ afb_proto_ws_call_unref(call);
}
-/* on subcall reply */
-static void server_on_subcall_reply(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
- char ie;
- uint32_t subcallid;
- struct json_object *object;
- struct server_subcall *sc, **psc;
-
- /* reads the call message data */
- if (!readbuf_uint32(rb, &subcallid)
- || !readbuf_char(rb, &ie)
- || !readbuf_object(rb, &object)) {
- /* TODO bad protocol */
- return;
- }
-
- /* search the subcall and unlink it */
- pthread_mutex_lock(&stubws->mutex);
- psc = &stubws->subcalls;
- while ((sc = *psc) && sc->subcallid != subcallid)
- psc = &sc->next;
- if (!sc) {
- pthread_mutex_unlock(&stubws->mutex);
- /* TODO subcall not found */
- } else {
- *psc = sc->next;
- pthread_mutex_unlock(&stubws->mutex);
- sc->callback(sc->closure, -(int)ie, object);
- free(sc);
- }
- json_object_put(object);
-}
-
-static void server_send_description(struct afb_stub_ws *stubws, uint32_t descid, struct json_object *descobj)
-{
- struct writebuf wb = { .count = 0 };
-
- if (!writebuf_char(&wb, CHAR_FOR_DESCRIPTION)
- || !writebuf_uint32(&wb, descid)
- || !writebuf_object(&wb, descobj)
- || afb_ws_binary_v(stubws->ws, wb.iovec, wb.count) < 0)
- ERROR("can't send description");
-}
-
-static void server_describe_job(int signum, void *closure)
+static void server_describe_sjob(int signum, void *closure)
{
struct json_object *obj;
struct server_describe *desc = closure;
obj = !signum ? afb_apiset_describe(desc->stubws->apiset, desc->stubws->apiname) : NULL;
/* send it */
- server_send_description(desc->stubws, desc->descid, obj);
+ afb_proto_ws_describe_put(desc->describe, obj);
json_object_put(obj);
afb_stub_ws_unref(desc->stubws);
- free(desc);
-}
-
-/* on describe, propagate it to the ws service */
-static void server_on_describe(struct afb_stub_ws *stubws, struct readbuf *rb)
-{
-
- uint32_t descid;
- struct server_describe *desc;
-
- /* reads the descid */
- if (readbuf_uint32(rb, &descid)) {
- /* create asynchronous job */
- desc = malloc(sizeof *desc);
- if (desc) {
- desc->descid = descid;
- desc->stubws = stubws;
- afb_stub_ws_addref(stubws);
- if (jobs_queue(NULL, 0, server_describe_job, desc) < 0)
- server_describe_job(0, desc);
- return;
- }
- server_send_description(stubws, descid, NULL);
- }
- ERROR("can't provide description");
-}
-
-/* callback when receiving binary data */
-static void server_on_binary(void *closure, char *data, size_t size)
-{
- if (size > 0) {
- struct readbuf rb = { .head = data, .end = data + size };
- switch (*rb.head++) {
- case CHAR_FOR_CALL:
- server_on_call(closure, &rb);
- break;
- case CHAR_FOR_SUBCALL_REPLY:
- server_on_subcall_reply(closure, &rb);
- break;
- case CHAR_FOR_DESCRIBE:
- server_on_describe(closure, &rb);
- break;
- default: /* unexpected message */
- /* TODO: close the connection */
- break;
- }
- }
- free(data);
}
-/******************* server part: manage events **********************************/
-
-static void server_event_send(struct afb_stub_ws *stubws, char order, const char *event, int eventid, const char *data)
-{
- int rc;
- struct writebuf wb = { .count = 0 };
-
- if (writebuf_char(&wb, order)
- && writebuf_uint32(&wb, eventid)
- && writebuf_string(&wb, event)
- && (data == NULL || writebuf_string(&wb, data))) {
- rc = afb_ws_binary_v(stubws->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
- }
- ERROR("error while sending %c for event %s", order, event);
-}
-
-static void server_event_add(void *closure, const char *event, int eventid)
-{
- server_event_send(closure, CHAR_FOR_EVT_ADD, event, eventid, NULL);
-}
-
-static void server_event_remove(void *closure, const char *event, int eventid)
-{
- server_event_send(closure, CHAR_FOR_EVT_DEL, event, eventid, NULL);
-}
-
-static void server_event_push(void *closure, const char *event, int eventid, struct json_object *object)
+static void server_describe_job(int signum, void *closure)
{
- const char *data = json_object_to_json_string_ext(object, JSON_C_TO_STRING_PLAIN);
- server_event_send(closure, CHAR_FOR_EVT_PUSH, event, eventid, data ? : "null");
- json_object_put(object);
+ server_describe_sjob(signum, closure);
+ free(closure);
}
-static void server_event_broadcast(void *closure, const char *event, int eventid, struct json_object *object)
+static void on_describe(void *closure, struct afb_proto_ws_describe *describe)
{
- int rc;
+ struct server_describe *desc, sdesc;
struct afb_stub_ws *stubws = closure;
- struct writebuf wb = { .count = 0 };
+ /* allocate (if possible) and init */
+ desc = malloc(sizeof *desc);
+ if (desc == NULL)
+ desc = &sdesc;
+ desc->stubws = stubws;
+ desc->describe = describe;
+ afb_stub_ws_addref(stubws);
- if (writebuf_char(&wb, CHAR_FOR_EVT_BROADCAST) && writebuf_string(&wb, event) && writebuf_object(&wb, object)) {
- rc = afb_ws_binary_v(stubws->ws, wb.iovec, wb.count);
- if (rc < 0)
- ERROR("error while broadcasting event %s", event);
- } else
- ERROR("error while broadcasting event %s", event);
- json_object_put(object);
+ /* process */
+ if (desc == &sdesc)
+ jobs_call(NULL, 0, server_describe_sjob, desc);
+ else {
+ if (jobs_queue(NULL, 0, server_describe_job, desc) < 0)
+ jobs_call(NULL, 0, server_describe_job, desc);
+ }
}
/*****************************************************/
-/* callback when receiving a hangup */
-static void server_on_hangup(void *closure)
-{
- struct afb_stub_ws *stubws = closure;
-
- /* close the socket */
- if (stubws->fd >= 0) {
- close(stubws->fd);
- stubws->fd = -1;
- if (stubws->on_hangup)
- stubws->on_hangup(stubws);
- }
+static const struct afb_proto_ws_client_itf client_itf =
+{
+ .on_reply_success = on_reply_success,
+ .on_reply_fail = on_reply_fail,
+ .on_event_create = on_event_create,
+ .on_event_remove = on_event_remove,
+ .on_event_subscribe = on_event_subscribe,
+ .on_event_unsubscribe = on_event_unsubscribe,
+ .on_event_push = on_event_push,
+ .on_event_broadcast = on_event_broadcast,
+ .on_subcall = on_subcall
+};
- /* release the client */
- afb_stub_ws_unref(stubws);
-}
+static const struct afb_proto_ws_server_itf server_itf =
+{
+ .on_call = on_call,
+ .on_describe = on_describe
+};
-/*****************************************************/
+static struct afb_api_itf ws_api_itf = {
+ .call = client_call_cb,
+ .describe = client_describe_cb
+};
/* the interface for events pushing */
static const struct afb_evt_itf server_evt_itf = {
.remove = server_event_remove
};
-static const struct afb_ws_itf stub_ws_client_ws_itf =
+/*****************************************************/
+
+static void drop_all_events(struct afb_stub_ws *stubws)
{
- .on_close = NULL,
- .on_text = NULL,
- .on_binary = client_on_binary,
- .on_error = NULL,
- .on_hangup = NULL
-};
+ struct client_event *ev, *nxt;
+
+ ev = stubws->events;
+ stubws->events = NULL;
-static const struct afb_ws_itf server_ws_itf =
+ while (ev) {
+ nxt = ev->next;
+ afb_event_drop(ev->event);
+ free(ev);
+ ev = nxt;
+ }
+}
+
+/* callback when receiving a hangup */
+static void on_hangup(void *closure)
{
- .on_close = NULL,
- .on_text = NULL,
- .on_binary = server_on_binary,
- .on_error = NULL,
- .on_hangup = server_on_hangup
-};
+ struct afb_stub_ws *stubws = closure;
-static struct afb_api_itf ws_api_itf = {
- .call = client_call_cb,
- .describe = client_describe_cb
-};
+ if (stubws->on_hangup)
+ stubws->on_hangup(stubws);
+}
/*****************************************************/
-static struct afb_stub_ws *afb_stub_ws_create(int fd, const char *apiname, struct afb_apiset *apiset, const struct afb_ws_itf *itf)
+static struct afb_stub_ws *afb_stub_ws_create(int fd, const char *apiname, struct afb_apiset *apiset, int client)
{
struct afb_stub_ws *stubws;
if (stubws == NULL)
errno = ENOMEM;
else {
- fcntl(fd, F_SETFD, FD_CLOEXEC);
- fcntl(fd, F_SETFL, O_NONBLOCK);
- stubws->ws = afb_ws_create(afb_common_get_event_loop(), fd, itf, stubws);
- if (stubws->ws != NULL) {
- stubws->fd = fd;
+ if (client)
+ stubws->proto = afb_proto_ws_create_client(fd, &client_itf, stubws);
+ else
+ stubws->proto = afb_proto_ws_create_server(fd, &server_itf, stubws);
+ if (stubws->proto != NULL) {
strcpy(stubws->apiname, apiname);
stubws->apiset = afb_apiset_addref(apiset);
stubws->refcount = 1;
- stubws->subcalls = NULL;
+ afb_proto_ws_on_hangup(stubws->proto, on_hangup);
return stubws;
}
free(stubws);
struct afb_stub_ws *afb_stub_ws_create_client(int fd, const char *apiname, struct afb_apiset *apiset)
{
- return afb_stub_ws_create(fd, apiname, apiset, &stub_ws_client_ws_itf);
+ return afb_stub_ws_create(fd, apiname, apiset, 1);
}
struct afb_stub_ws *afb_stub_ws_create_server(int fd, const char *apiname, struct afb_apiset *apiset)
{
struct afb_stub_ws *stubws;
- stubws = afb_stub_ws_create(fd, apiname, apiset, &server_ws_itf);
+ stubws = afb_stub_ws_create(fd, apiname, apiset, 0);
if (stubws) {
stubws->cred = afb_cred_create_for_socket(fd);
stubws->listener = afb_evt_listener_create(&server_evt_itf, stubws);
void afb_stub_ws_unref(struct afb_stub_ws *stubws)
{
- struct server_subcall *sc, *nsc;
-
if (!__atomic_sub_fetch(&stubws->refcount, 1, __ATOMIC_RELAXED)) {
+ drop_all_events(stubws);
afb_evt_listener_unref(stubws->listener);
- afb_ws_destroy(stubws->ws);
- nsc = stubws->subcalls;
- while (nsc) {
- sc= nsc;
- nsc = sc->next;
- sc->callback(sc->closure, 1, NULL);
- free(sc);
- }
+ afb_proto_ws_unref(stubws->proto);
afb_cred_unref(stubws->cred);
afb_apiset_unref(stubws->apiset);
free(stubws);
Code Review / src / app-framework-binder.git / commitdiff