/*
- * Copyright (C) 2015, 2016 "IoT.bzh"
+ * Copyright (C) 2015-2020 "IoT.bzh"
* Author José Bollo <jose.bollo@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
*/
#define _GNU_SOURCE
-#define NO_PLUGIN_VERBOSE_MACRO
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
-#include <json-c/json.h>
-#include <systemd/sd-event.h>
-
-#include <afb/afb-req-itf.h>
-
-#include "afb-common.h"
-
-#include "session.h"
-#include "afb-ws.h"
-#include "afb-msg-json.h"
-#include "afb-apis.h"
-#include "afb-api-so.h"
-#include "afb-context.h"
-#include "afb-evt.h"
-#include "afb-subcall.h"
+#include "afb-api.h"
+#include "afb-apiset.h"
+#include "afb-api-ws.h"
+#include "afb-fdev.h"
+#include "afb-socket.h"
+#include "afb-stub-ws.h"
#include "verbose.h"
+#include "fdev.h"
-struct api_ws_memo;
-struct api_ws_event;
-struct api_ws_client;
-
-
-
-/*
- */
-struct api_ws
-{
- char *path; /* path of the object for the API */
- char *api; /* api name of the interface */
- int fd; /* file descriptor */
- union {
- struct {
- uint32_t id;
- struct afb_ws *ws;
- struct api_ws_event *events;
- struct api_ws_memo *memos;
- } client;
- struct {
- sd_event_source *listensrc;
- struct afb_evt_listener *listener; /* listener for broadcasted events */
- } server;
- };
-};
-
-#define RETOK 1
-#define RETERR 2
-#define RETRAW 3
-
-/******************* websocket interface for client part **********************************/
-
-static void api_ws_client_on_binary(void *closure, char *data, size_t size);
-
-static const struct afb_ws_itf api_ws_client_ws_itf =
-{
- .on_close = NULL,
- .on_text = NULL,
- .on_binary = api_ws_client_on_binary,
- .on_error = NULL,
- .on_hangup = NULL
-};
-
-/******************* event structures for server part **********************************/
-
-static void api_ws_server_event_add(void *closure, const char *event, int eventid);
-static void api_ws_server_event_remove(void *closure, const char *event, int eventid);
-static void api_ws_server_event_push(void *closure, const char *event, int eventid, struct json_object *object);
-static void api_ws_server_event_broadcast(void *closure, const char *event, int eventid, struct json_object *object);
-
-/* the interface for events pushing */
-static const struct afb_evt_itf api_ws_server_evt_itf = {
- .broadcast = api_ws_server_event_broadcast,
- .push = api_ws_server_event_push,
- .add = api_ws_server_event_add,
- .remove = api_ws_server_event_remove
-};
-
-/******************* client description part for server *****************************/
-
-struct api_ws_client
-{
- /* the server ws-api */
- const char *api;
-
- /* count of references */
- int refcount;
-
- /* listener for events */
- struct afb_evt_listener *listener;
-
- /* file descriptor */
- int fd;
-
- /* websocket */
- struct afb_ws *ws;
-};
-
-/******************* websocket interface for client part **********************************/
-
-static void api_ws_server_on_binary(void *closure, char *data, size_t size);
-static void api_ws_server_on_hangup(void *closure);
-
-static const struct afb_ws_itf api_ws_server_ws_itf =
+struct api_ws_server
{
- .on_close = NULL,
- .on_text = NULL,
- .on_binary = api_ws_server_on_binary,
- .on_error = NULL,
- .on_hangup = api_ws_server_on_hangup
-};
-
-/******************* ws request part for server *****************/
-
-/*
- * structure for a ws request
- */
-struct api_ws_server_req {
- struct afb_context context; /* the context, should be THE FIRST */
- struct api_ws_client *client; /* the client of the request */
- char *rcvdata; /* the received data to free */
- struct json_object *json; /* the readen request as object */
- const char *request; /* the readen request as string */
- size_t lenreq; /* the length of the request */
- int refcount; /* reference count of the request */
- uint32_t msgid; /* the incoming request msgid */
-};
-
-static struct json_object *api_ws_server_req_json(struct api_ws_server_req *wreq);
-static void api_ws_server_req_unref(struct api_ws_server_req *wreq);
-
-static struct json_object *api_ws_server_req_json_cb(void *closure);
-static struct afb_arg api_ws_server_req_get_cb(void *closure, const char *name);
-static void api_ws_server_req_success_cb(void *closure, struct json_object *obj, const char *info);
-static void api_ws_server_req_fail_cb(void *closure, const char *status, const char *info);
-static const char *api_ws_server_req_raw_cb(void *closure, size_t *size);
-static void api_ws_server_req_send_cb(void *closure, const char *buffer, size_t size);
-static void api_ws_server_req_addref_cb(void *closure);
-static void api_ws_server_req_unref_cb(void *closure);
-static int api_ws_server_req_subscribe_cb(void *closure, struct afb_event event);
-static int api_ws_server_req_unsubscribe_cb(void *closure, struct afb_event event);
-static void api_ws_server_req_subcall_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure);
-
-const struct afb_req_itf afb_api_ws_req_itf = {
- .json = api_ws_server_req_json_cb,
- .get = api_ws_server_req_get_cb,
- .success = api_ws_server_req_success_cb,
- .fail = api_ws_server_req_fail_cb,
- .raw = api_ws_server_req_raw_cb,
- .send = api_ws_server_req_send_cb,
- .context_get = (void*)afb_context_get,
- .context_set = (void*)afb_context_set,
- .addref = api_ws_server_req_addref_cb,
- .unref = api_ws_server_req_unref_cb,
- .session_close = (void*)afb_context_close,
- .session_set_LOA = (void*)afb_context_change_loa,
- .subscribe = api_ws_server_req_subscribe_cb,
- .unsubscribe = api_ws_server_req_unsubscribe_cb,
- .subcall = api_ws_server_req_subcall_cb
+ struct afb_apiset *apiset; /* the apiset for calling */
+ struct fdev *fdev; /* fdev handler */
+ uint16_t offapi; /* api name of the interface */
+ char uri[]; /* the uri of the server socket */
};
-/******************* common part **********************************/
-
-/*
- * create a structure api_ws not connected to the 'path'.
- */
-static struct api_ws *api_ws_make(const char *path)
-{
- struct api_ws *api;
- size_t length;
-
- /* allocates the structure */
- length = strlen(path);
- api = calloc(1, sizeof *api + 1 + length);
- if (api == NULL) {
- errno = ENOMEM;
- goto error;
- }
-
- /* path is copied after the struct */
- api->path = (char*)(api+1);
- memcpy(api->path, path, length + 1);
-
- /* api name is at the end of the path */
- api->api = strrchr(api->path, '/');
- if (api->api == NULL || !afb_apis_is_valid_api_name(++api->api)) {
- errno = EINVAL;
- goto error2;
- }
+/******************************************************************************/
+/*** C L I E N T ***/
+/******************************************************************************/
- api->fd = -1;
- return api;
-
-error2:
- free(api);
-error:
- return NULL;
-}
-
-static int api_ws_socket_unix(const char *path, int server)
+static struct fdev *reopen_client(void *closure)
{
- int fd, rc;
- struct sockaddr_un addr;
- size_t length;
-
- length = strlen(path);
- if (length >= 108) {
- errno = ENAMETOOLONG;
- return -1;
- }
-
- if (server)
- unlink(path);
-
- fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if (fd < 0)
- return fd;
-
- memset(&addr, 0, sizeof addr);
- addr.sun_family = AF_UNIX;
- strcpy(addr.sun_path, path);
- if (server) {
- rc = bind(fd, (struct sockaddr *) &addr, (socklen_t)(sizeof addr));
- } else {
- rc = connect(fd, (struct sockaddr *) &addr, (socklen_t)(sizeof addr));
- }
- if (rc < 0) {
- close(fd);
- return rc;
- }
- return fd;
+ const char *uri = closure;
+ return afb_socket_open_fdev(uri, 0);
}
-static int api_ws_socket_inet(const char *path, int server)
+int afb_api_ws_add_client(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set, int strong)
{
- int rc, fd;
- const char *service, *host, *api;
- struct addrinfo hint, *rai, *iai;
-
- /* scan the uri */
- api = strrchr(path, '/');
- service = strrchr(path, ':');
- if (api == NULL || service == NULL || api < service) {
- errno = EINVAL;
- return -1;
- }
- host = strndupa(path, service++ - path);
- service = strndupa(service, api - service);
+ struct afb_stub_ws *stubws;
+ struct fdev *fdev;
+ const char *api;
- /* get addr */
- memset(&hint, 0, sizeof hint);
- hint.ai_family = AF_INET;
- hint.ai_socktype = SOCK_STREAM;
- rc = getaddrinfo(host, service, &hint, &rai);
- if (rc != 0) {
+ /* check the api name */
+ api = afb_socket_api(uri);
+ if (api == NULL || !afb_api_is_valid_name(api)) {
+ ERROR("invalid (too long) ws client uri %s", uri);
errno = EINVAL;
- return -1;
+ goto error;
}
- /* get the socket */
- iai = rai;
- while (iai != NULL) {
- fd = socket(iai->ai_family, iai->ai_socktype, iai->ai_protocol);
- if (fd >= 0) {
- if (server) {
- rc = bind(fd, iai->ai_addr, iai->ai_addrlen);
- } else {
- rc = connect(fd, iai->ai_addr, iai->ai_addrlen);
- }
- if (rc == 0) {
- freeaddrinfo(rai);
- return fd;
+ /* open the socket */
+ fdev = afb_socket_open_fdev(uri, 0);
+ if (fdev) {
+ /* create the client stub */
+ stubws = afb_stub_ws_create_client(fdev, api, call_set);
+ if (!stubws) {
+ ERROR("can't setup client ws service to %s", uri);
+ fdev_unref(fdev);
+ } else {
+ if (afb_stub_ws_client_add(stubws, declare_set) >= 0) {
+#if 1
+ /* it is asserted here that uri is never released */
+ afb_stub_ws_client_robustify(stubws, reopen_client, (void*)uri, NULL);
+#else
+ /* it is asserted here that uri is released, so use a copy */
+ afb_stub_ws_client_robustify(stubws, reopen_client, strdup(uri), free);
+#endif
+ return 0;
}
- close(fd);
- }
- iai = iai->ai_next;
- }
- freeaddrinfo(rai);
- return -1;
-
-}
-
-static int api_ws_socket(const char *path, int server)
-{
- int fd, rc;
-
- /* check for unix socket */
- if (0 == strncmp(path, "unix:", 5))
- fd = api_ws_socket_unix(path + 5, server);
- else
- fd = api_ws_socket_inet(path, server);
-
- if (fd >= 0) {
- fcntl(fd, F_SETFD, FD_CLOEXEC);
- fcntl(fd, F_SETFL, O_NONBLOCK);
- if (server) {
- rc = 1;
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &rc, sizeof rc);
- rc = listen(fd, 5);
- }
- }
- return fd;
-}
-
-/******************* 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 *api_ws_read_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 api_ws_read_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 api_ws_read_string(struct readbuf *rb, const char **value, size_t *length)
-{
- uint32_t len;
- if (!api_ws_read_uint32(rb, &len) || !len)
- return 0;
- if (length)
- *length = (size_t)(len - 1);
- return (*value = api_ws_read_get(rb, len)) != NULL && rb->head[-1] == 0;
-}
-
-static int api_ws_read_object(struct readbuf *rb, struct json_object **object)
-{
- size_t length;
- const char *string;
- return api_ws_read_string(rb, &string, &length) && ((*object = json_tokener_parse(string)) != NULL) == (strcmp(string, "null") != 0);
-}
-
-static int api_ws_write_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 api_ws_write_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 api_ws_write_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 api_ws_write_string_nz(struct writebuf *wb, const char *value, size_t length)
-{
- uint32_t len = (uint32_t)length;
- return (size_t)len == length && ++len && api_ws_write_uint32(wb, len) && api_ws_write_put(wb, value, length) && api_ws_write_char(wb, '\0');
-}
-
-static int api_ws_write_string_length(struct writebuf *wb, const char *value, size_t length)
-{
- uint32_t len = (uint32_t)++length;
- return (size_t)len == length && len && api_ws_write_uint32(wb, len) && api_ws_write_put(wb, value, length);
-}
-
-static int api_ws_write_string(struct writebuf *wb, const char *value)
-{
- return api_ws_write_string_length(wb, value, strlen(value));
-}
-
-static int api_ws_write_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 && api_ws_write_string(wb, string);
-}
-
-
-
-
-/******************* client part **********************************/
-
-/*
- * structure for recording query data
- */
-struct api_ws_memo {
- struct api_ws_memo *next; /* the next memo */
- struct api_ws *api; /* the ws api */
- struct afb_req req; /* the request handle */
- struct afb_context *context; /* the context of the query */
- uint32_t msgid; /* the message identifier */
-};
-
-struct api_ws_event
-{
- struct api_ws_event *next;
- struct afb_event event;
- int eventid;
- int refcount;
-};
-
-/* search a memorized request */
-static struct api_ws_memo *api_ws_client_memo_search(struct api_ws *api, uint32_t msgid)
-{
- struct api_ws_memo *memo;
-
- memo = api->client.memos;
- while (memo != NULL && memo->msgid != msgid)
- memo = memo->next;
-
- return memo;
-}
-
-/* search the event */
-static struct api_ws_event *api_ws_client_event_search(struct api_ws *api, uint32_t eventid, const char *name)
-{
- struct api_ws_event *ev;
-
- ev = api->client.events;
- while (ev != NULL && (ev->eventid != eventid || 0 != strcmp(afb_evt_event_name(ev->event), name)))
- ev = ev->next;
-
- return ev;
-}
-
-
-/* allocates and init the memorizing data */
-static struct api_ws_memo *api_ws_client_memo_make(struct api_ws *api, struct afb_req req, struct afb_context *context)
-{
- struct api_ws_memo *memo;
-
- memo = malloc(sizeof *memo);
- if (memo != NULL) {
- afb_req_addref(req);
- memo->req = req;
- memo->context = context;
- do { memo->msgid = ++api->client.id; } while(api_ws_client_memo_search(api, memo->msgid) != NULL);
- memo->api = api;
- memo->next = api->client.memos;
- api->client.memos = memo;
- }
- return memo;
-}
-
-/* free and release the memorizing data */
-static void api_ws_client_memo_destroy(struct api_ws_memo *memo)
-{
- struct api_ws_memo **prv;
-
- prv = &memo->api->client.memos;
- while (*prv != NULL) {
- if (*prv == memo) {
- *prv = memo->next;
- break;
- }
- prv = &(*prv)->next;
- }
-
- afb_req_unref(memo->req);
- free(memo);
-}
-
-/* get event data from the message */
-static int api_ws_client_msg_event_read(struct readbuf *rb, uint32_t *eventid, const char **name)
-{
- return api_ws_read_uint32(rb, eventid) && api_ws_read_string(rb, name, NULL);
-}
-
-/* get event from the message */
-static int api_ws_client_msg_event_get(struct api_ws *api, struct readbuf *rb, struct api_ws_event **ev)
-{
- const char *name;
- uint32_t eventid;
-
- /* get event data from the message */
- if (!api_ws_client_msg_event_read(rb, &eventid, &name)) {
- ERROR("Invalid message");
- return 0;
- }
-
- /* check conflicts */
- *ev = api_ws_client_event_search(api, eventid, name);
- if (*ev == NULL) {
- ERROR("event %s not found", name);
- return 0;
- }
-
- return 1;
-}
-
-/* get event from the message */
-static int api_ws_client_msg_memo_get(struct api_ws *api, struct readbuf *rb, struct api_ws_memo **memo)
-{
- uint32_t msgid;
-
- /* get event data from the message */
- if (!api_ws_read_uint32(rb, &msgid)) {
- ERROR("Invalid message");
- return 0;
- }
-
- /* get the memo */
- *memo = api_ws_client_memo_search(api, msgid);
- if (*memo == NULL) {
- ERROR("message not found");
- return 0;
- }
-
- return 1;
-}
-
-/* read a subscrition message */
-static int api_ws_client_msg_subscription_get(struct api_ws *api, struct readbuf *rb, struct api_ws_event **ev, struct api_ws_memo **memo)
-{
- return api_ws_client_msg_memo_get(api, rb, memo) && api_ws_client_msg_event_get(api, rb, ev);
-}
-
-/* adds an event */
-static void api_ws_client_event_create(struct api_ws *api, struct readbuf *rb)
-{
- size_t offset;
- const char *name;
- uint32_t eventid;
- struct api_ws_event *ev;
-
- /* get event data from the message */
- offset = api_ws_client_msg_event_read(rb, &eventid, &name);
- if (offset == 0) {
- ERROR("Invalid message");
- return;
- }
-
- /* check conflicts */
- ev = api_ws_client_event_search(api, eventid, 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->refcount = 1;
- ev->eventid = eventid;
- ev->next = api->client.events;
- api->client.events = ev;
- return;
- }
- }
- ERROR("can't create event %s, out of memory", name);
-}
-
-/* removes an event */
-static void api_ws_client_event_drop(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_event *ev, **prv;
-
- /* retrieves the event */
- if (!api_ws_client_msg_event_get(api, rb, &ev))
- return;
-
- /* decrease the reference count */
- if (--ev->refcount)
- return;
-
- /* unlinks the event */
- prv = &api->client.events;
- while (*prv != ev)
- prv = &(*prv)->next;
- *prv = ev->next;
-
- /* destroys the event */
- afb_event_drop(ev->event);
- free(ev);
-}
-
-/* subscribes an event */
-static void api_ws_client_event_subscribe(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_event *ev;
- struct api_ws_memo *memo;
-
- if (api_ws_client_msg_subscription_get(api, rb, &ev, &memo)) {
- /* subscribe the request from the event */
- if (afb_req_subscribe(memo->req, ev->event) < 0)
- ERROR("can't subscribe: %m");
- }
-}
-
-/* unsubscribes an event */
-static void api_ws_client_event_unsubscribe(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_event *ev;
- struct api_ws_memo *memo;
-
- if (api_ws_client_msg_subscription_get(api, rb, &ev, &memo)) {
- /* unsubscribe the request from the event */
- if (afb_req_unsubscribe(memo->req, ev->event) < 0)
- ERROR("can't unsubscribe: %m");
- }
-}
-
-/* receives broadcasted events */
-static void api_ws_client_event_broadcast(struct api_ws *api, struct readbuf *rb)
-{
- struct json_object *object;
- const char *event;
-
- if (api_ws_read_string(rb, &event, NULL) && api_ws_read_object(rb, &object))
- afb_evt_broadcast(event, object);
- else
- ERROR("unreadable broadcasted event");
-}
-
-/* pushs an event */
-static void api_ws_client_event_push(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_event *ev;
- struct json_object *object;
-
- if (api_ws_client_msg_event_get(api, rb, &ev) && api_ws_read_object(rb, &object))
- afb_event_push(ev->event, object);
- else
- ERROR("unreadable push event");
-}
-
-static void api_ws_client_reply_success(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_memo *memo;
- struct json_object *object;
- const char *info;
- uint32_t flags;
-
- /* retrieve the message data */
- if (!api_ws_client_msg_memo_get(api, rb, &memo))
- return;
-
- if (api_ws_read_uint32(rb, &flags)
- && api_ws_read_string(rb, &info, NULL)
- && api_ws_read_object(rb, &object)) {
- memo->context->flags = (unsigned)flags;
- afb_req_success(memo->req, object, *info ? info : NULL);
- } else {
- /* failing to have the answer */
- afb_req_fail(memo->req, "error", "ws error");
- }
- api_ws_client_memo_destroy(memo);
-}
-
-static void api_ws_client_reply_fail(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_memo *memo;
- const char *info, *status;
- uint32_t flags;
-
- /* retrieve the message data */
- if (!api_ws_client_msg_memo_get(api, rb, &memo))
- return;
-
- if (api_ws_read_uint32(rb, &flags)
- && api_ws_read_string(rb, &status, NULL)
- && api_ws_read_string(rb, &info, NULL)) {
- memo->context->flags = (unsigned)flags;
- afb_req_fail(memo->req, status, *info ? info : NULL);
- } else {
- /* failing to have the answer */
- afb_req_fail(memo->req, "error", "ws error");
- }
- api_ws_client_memo_destroy(memo);
-}
-
-static void api_ws_client_reply_send(struct api_ws *api, struct readbuf *rb)
-{
- struct api_ws_memo *memo;
- const char *data;
- size_t length;
- uint32_t flags;
-
- /* retrieve the message data */
- if (!api_ws_client_msg_memo_get(api, rb, &memo))
- return;
-
- if (api_ws_read_uint32(rb, &flags)
- && api_ws_read_string(rb, &data, &length)) {
- memo->context->flags = (unsigned)flags;
- afb_req_send(memo->req, data, length);
- } else {
- /* failing to have the answer */
- afb_req_fail(memo->req, "error", "ws error");
- }
- api_ws_client_memo_destroy(memo);
-}
-
-/* callback when receiving binary data */
-static void api_ws_client_on_binary(void *closure, char *data, size_t size)
-{
- if (size > 0) {
- struct readbuf rb = { .head = data, .end = data + size };
- switch (*rb.head++) {
- case 'T': /* success */
- api_ws_client_reply_success(closure, &rb);
- break;
- case 'F': /* fail */
- api_ws_client_reply_fail(closure, &rb);
- break;
- case 'X': /* send */
- api_ws_client_reply_send(closure, &rb);
- break;
- case '*': /* broadcast */
- api_ws_client_event_broadcast(closure, &rb);
- break;
- case '+': /* creates the event */
- api_ws_client_event_create(closure, &rb);
- break;
- case '-': /* drops the event */
- api_ws_client_event_drop(closure, &rb);
- break;
- case '!': /* pushs the event */
- api_ws_client_event_push(closure, &rb);
- break;
- case 'S': /* subscribe event for a request */
- api_ws_client_event_subscribe(closure, &rb);
- break;
- case 'U': /* unsubscribe event for a request */
- api_ws_client_event_unsubscribe(closure, &rb);
- break;
- default: /* unexpected message */
- break;
- }
- }
- free(data);
-}
-
-/* on call, propagate it to the ws service */
-static void api_ws_client_call_cb(void * closure, struct afb_req req, struct afb_context *context, const char *verb, size_t lenverb)
-{
- int rc;
- struct api_ws_memo *memo;
- struct writebuf wb = { .count = 0 };
- const char *raw;
- size_t szraw;
- struct api_ws *api = closure;
-
- /* create the recording data */
- memo = api_ws_client_memo_make(api, req, context);
- if (memo == NULL) {
- afb_req_fail(req, "error", "out of memory");
- return;
- }
-
- /* creates the call message */
- raw = afb_req_raw(req, &szraw);
- if (raw == NULL)
- goto internal_error;
- if (!api_ws_write_uint32(&wb, memo->msgid)
- || !api_ws_write_uint32(&wb, (uint32_t)context->flags)
- || !api_ws_write_string_nz(&wb, verb, lenverb)
- || !api_ws_write_string(&wb, ctxClientGetUuid(context->session))
- || !api_ws_write_string_length(&wb, raw, szraw))
- goto overflow;
-
- /* send */
- rc = afb_ws_binary_v(api->client.ws, wb.iovec, wb.count);
- if (rc < 0)
- goto ws_send_error;
- return;
-
-ws_send_error:
- afb_req_fail(req, "error", "websocket sending error");
- goto clean_memo;
-
-internal_error:
- afb_req_fail(req, "error", "internal: raw is NULL!");
- goto clean_memo;
-
-overflow:
- afb_req_fail(req, "error", "overflow: size doesn't match 32 bits!");
-
-clean_memo:
- api_ws_client_memo_destroy(memo);
-}
-
-static int api_ws_service_start_cb(void *closure, int share_session, int onneed)
-{
- struct api_ws *api = closure;
-
- /* not an error when onneed */
- if (onneed != 0)
- return 0;
-
- /* already started: it is an error */
- ERROR("The WS binding %s is not a startable service", api->path);
- return -1;
-}
-
-/* */
-static void api_ws_client_disconnect(struct api_ws *api)
-{
- if (api->fd >= 0) {
- afb_ws_destroy(api->client.ws);
- api->client.ws = NULL;
- close(api->fd);
- api->fd = -1;
- }
-}
-
-/* */
-static int api_ws_client_connect(struct api_ws *api)
-{
- struct afb_ws *ws;
- int fd;
-
- fd = api_ws_socket(api->path, 0);
- if (fd >= 0) {
- ws = afb_ws_create(afb_common_get_event_loop(), fd, &api_ws_client_ws_itf, api);
- if (ws != NULL) {
- api->client.ws = ws;
- api->fd = fd;
- return 0;
+ ERROR("can't add the client to the apiset for service %s", uri);
+ afb_stub_ws_unref(stubws);
}
- close(fd);
- }
- return -1;
-}
-
-/* adds a afb-ws-service client api */
-int afb_api_ws_add_client(const char *path)
-{
- int rc;
- struct api_ws *api;
- struct afb_api afb_api;
-
- /* create the ws client api */
- api = api_ws_make(path);
- if (api == NULL)
- goto error;
-
- /* connect to the service */
- rc = api_ws_client_connect(api);
- if (rc < 0) {
- ERROR("can't connect to ws service %s", api->path);
- goto error2;
}
-
- /* record it as an API */
- afb_api.closure = api;
- afb_api.call = api_ws_client_call_cb;
- afb_api.service_start = api_ws_service_start_cb;
- if (afb_apis_add(api->api, afb_api) < 0)
- goto error3;
-
- return 0;
-
-error3:
- api_ws_client_disconnect(api);
-error2:
- free(api);
error:
- return -1;
-}
-
-/******************* client description part for server *****************************/
-
-static void api_ws_server_client_unref(struct api_ws_client *client)
-{
- if (!--client->refcount) {
- afb_evt_listener_unref(client->listener);
- afb_ws_destroy(client->ws);
- free(client);
- }
+ return -!!strong;
}
-/* on call, propagate it to the ws service */
-static void api_ws_server_called(struct api_ws_client *client, struct readbuf *rb, char *data, size_t size)
+int afb_api_ws_add_client_strong(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set)
{
- struct api_ws_server_req *wreq;
- struct afb_req areq;
- const char *uuid, *verb;
- uint32_t flags;
-
- client->refcount++;
-
- /* create the request */
- wreq = calloc(1 , sizeof *wreq);
- if (wreq == NULL)
- goto out_of_memory;
-
- wreq->client = client;
- wreq->rcvdata = data;
- wreq->refcount = 1;
-
- /* reads the call message data */
- if (!api_ws_read_uint32(rb, &wreq->msgid)
- || !api_ws_read_uint32(rb, &flags)
- || !api_ws_read_string(rb, &verb, NULL)
- || !api_ws_read_string(rb, &uuid, NULL)
- || !api_ws_read_string(rb, &wreq->request, &wreq->lenreq))
- goto overflow;
-
- /* init the context */
- if (afb_context_connect(&wreq->context, uuid, NULL) < 0)
- goto out_of_memory;
- wreq->context.flags = flags;
-
- /* makes the call */
- areq.itf = &afb_api_ws_req_itf;
- areq.closure = wreq;
- afb_apis_call_(areq, &wreq->context, client->api, verb);
- api_ws_server_req_unref(wreq);
- return;
-
-out_of_memory:
-overflow:
- free(wreq);
- free(data);
- api_ws_server_client_unref(client);
+ return afb_api_ws_add_client(uri, declare_set, call_set, 1);
}
-/* callback when receiving binary data */
-static void api_ws_server_on_binary(void *closure, char *data, size_t size)
+int afb_api_ws_add_client_weak(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set)
{
- struct readbuf rb = { .head = data, .end = data + size };
- api_ws_server_called(closure, &rb, data, size);
+ return afb_api_ws_add_client(uri, declare_set, call_set, 0);
}
-/* callback when receiving a hangup */
-static void api_ws_server_on_hangup(void *closure)
-{
- struct api_ws_client *client = closure;
-
- /* close the socket */
- if (client->fd >= 0) {
- close(client->fd);
- client->fd = -1;
- }
+/*****************************************************************************/
+/*** S E R V E R ***/
+/******************************************************************************/
- /* release the client */
- api_ws_server_client_unref(client);
-}
-
-static void api_ws_server_accept(struct api_ws *api)
+static void api_ws_server_accept(struct api_ws_server *apiws)
{
- struct api_ws_client *client;
+ int fd;
struct sockaddr addr;
socklen_t lenaddr;
+ struct fdev *fdev;
+ struct afb_stub_ws *server;
- client = calloc(1, sizeof *client);
- if (client != NULL) {
- client->listener = afb_evt_listener_create(&api_ws_server_evt_itf, client);
- if (client->listener != NULL) {
- lenaddr = (socklen_t)sizeof addr;
- client->fd = accept(api->fd, &addr, &lenaddr);
- if (client->fd >= 0) {
- client->ws = afb_ws_create(afb_common_get_event_loop(), client->fd, &api_ws_server_ws_itf, client);
- if (client->ws != NULL) {
- client->api = api->api;
- client->refcount = 1;
- return;
- }
- close(client->fd);
- }
- afb_evt_listener_unref(client->listener);
+ lenaddr = (socklen_t)sizeof addr;
+ fd = accept(fdev_fd(apiws->fdev), &addr, &lenaddr);
+ if (fd < 0) {
+ ERROR("can't accept connection to %s: %m", apiws->uri);
+ } else {
+ fdev = afb_fdev_create(fd);
+ if (!fdev) {
+ ERROR("can't hold accepted connection to %s: %m", apiws->uri);
+ close(fd);
+ } else {
+ server = afb_stub_ws_create_server(fdev, &apiws->uri[apiws->offapi], apiws->apiset);
+ if (server)
+ afb_stub_ws_set_on_hangup(server, afb_stub_ws_unref);
+ else
+ ERROR("can't serve accepted connection to %s: %m", apiws->uri);
}
- free(client);
}
}
-/******************* server part: manage events **********************************/
-
-static void api_ws_server_event_send(struct api_ws_client *client, char order, const char *event, int eventid, const char *data)
-{
- int rc;
- struct writebuf wb = { .count = 0 };
-
- if (api_ws_write_char(&wb, order)
- && api_ws_write_uint32(&wb, eventid)
- && api_ws_write_string(&wb, event)
- && (data == NULL || api_ws_write_string(&wb, data))) {
- rc = afb_ws_binary_v(client->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
- }
- ERROR("error while sending %c for event %s", order, event);
-}
-
-static void api_ws_server_event_add(void *closure, const char *event, int eventid)
-{
- api_ws_server_event_send(closure, '+', event, eventid, NULL);
-}
-
-static void api_ws_server_event_remove(void *closure, const char *event, int eventid)
-{
- api_ws_server_event_send(closure, '-', event, eventid, NULL);
-}
-
-static void api_ws_server_event_push(void *closure, const char *event, int eventid, struct json_object *object)
-{
- const char *data = json_object_to_json_string_ext(object, JSON_C_TO_STRING_PLAIN);
- api_ws_server_event_send(closure, '!', event, eventid, data ? : "null");
- json_object_put(object);
-}
-
-static void api_ws_server_event_broadcast(void *closure, const char *event, int eventid, struct json_object *object)
-{
- int rc;
- struct api_ws_client *client = closure;
-
- struct writebuf wb = { .count = 0 };
-
- if (api_ws_write_char(&wb, '*') && api_ws_write_string(&wb, event) && api_ws_write_object(&wb, object)) {
- rc = afb_ws_binary_v(client->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);
-}
-
-/******************* ws request part for server *****************/
-
-/* increment the reference count of the request */
-static void api_ws_server_req_addref_cb(void *closure)
-{
- struct api_ws_server_req *wreq = closure;
- wreq->refcount++;
-}
-
-/* decrement the reference count of the request and free/release it on falling to null */
-static void api_ws_server_req_unref_cb(void *closure)
-{
- api_ws_server_req_unref(closure);
-}
+static int api_ws_server_connect(struct api_ws_server *apiws);
-static void api_ws_server_req_unref(struct api_ws_server_req *wreq)
+static void api_ws_server_listen_callback(void *closure, uint32_t revents, struct fdev *fdev)
{
- if (wreq == NULL || --wreq->refcount)
- return;
-
- afb_context_disconnect(&wreq->context);
- json_object_put(wreq->json);
- free(wreq->rcvdata);
- api_ws_server_client_unref(wreq->client);
- free(wreq);
-}
-
-/* get the object of the request */
-static struct json_object *api_ws_server_req_json_cb(void *closure)
-{
- return api_ws_server_req_json(closure);
-}
-
-static struct json_object *api_ws_server_req_json(struct api_ws_server_req *wreq)
-{
- if (wreq->json == NULL) {
- wreq->json = json_tokener_parse(wreq->request);
- if (wreq->json == NULL && strcmp(wreq->request, "null")) {
- /* lazy error detection of json request. Is it to improve? */
- wreq->json = json_object_new_string(wreq->request);
- }
- }
- return wreq->json;
-}
+ struct api_ws_server *apiws = closure;
-/* get the argument of the request of 'name' */
-static struct afb_arg api_ws_server_req_get_cb(void *closure, const char *name)
-{
- struct api_ws_server_req *wreq = closure;
- return afb_msg_json_get_arg(api_ws_server_req_json(wreq), name);
+ if ((revents & EPOLLHUP) != 0)
+ api_ws_server_connect(apiws);
+ else if ((revents & EPOLLIN) != 0)
+ api_ws_server_accept(apiws);
}
-static void api_ws_server_req_success_cb(void *closure, struct json_object *obj, const char *info)
+static void api_ws_server_disconnect(struct api_ws_server *apiws)
{
- int rc;
- struct writebuf wb = { .count = 0 };
- struct api_ws_server_req *wreq = closure;
-
- if (api_ws_write_char(&wb, 'T')
- && api_ws_write_uint32(&wb, wreq->msgid)
- && api_ws_write_uint32(&wb, (uint32_t)wreq->context.flags)
- && api_ws_write_string(&wb, info ? : "")
- && api_ws_write_object(&wb, obj)) {
- rc = afb_ws_binary_v(wreq->client->ws, wb.iovec, wb.count);
- if (rc >= 0)
- goto success;
- }
- ERROR("error while sending success");
-success:
- json_object_put(obj);
+ fdev_unref(apiws->fdev);
+ apiws->fdev = 0;
}
-static void api_ws_server_req_fail_cb(void *closure, const char *status, const char *info)
+static int api_ws_server_connect(struct api_ws_server *apiws)
{
- int rc;
- struct writebuf wb = { .count = 0 };
- struct api_ws_server_req *wreq = closure;
+ /* ensure disconnected */
+ api_ws_server_disconnect(apiws);
- if (api_ws_write_char(&wb, 'F')
- && api_ws_write_uint32(&wb, wreq->msgid)
- && api_ws_write_uint32(&wb, (uint32_t)wreq->context.flags)
- && api_ws_write_string(&wb, status)
- && api_ws_write_string(&wb, info ? : "")) {
- rc = afb_ws_binary_v(wreq->client->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
+ /* request the service object name */
+ apiws->fdev = afb_socket_open_fdev(apiws->uri, 1);
+ if (!apiws->fdev)
+ ERROR("can't create socket %s", apiws->uri);
+ else {
+ /* listen for service */
+ fdev_set_events(apiws->fdev, EPOLLIN);
+ fdev_set_callback(apiws->fdev, api_ws_server_listen_callback, apiws);
+ return 0;
}
- ERROR("error while sending fail");
-}
-
-static const char *api_ws_server_req_raw_cb(void *closure, size_t *size)
-{
- struct api_ws_server_req *wreq = closure;
- if (size != NULL)
- *size = wreq->lenreq;
- return wreq->request;
+ return -1;
}
-static void api_ws_server_req_send_cb(void *closure, const char *buffer, size_t size)
+/* create the service */
+int afb_api_ws_add_server(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set)
{
- /* TODO: how to put sized buffer as strings? things aren't clear here!!! */
int rc;
- struct writebuf wb = { .count = 0 };
- struct api_ws_server_req *wreq = closure;
-
- if (api_ws_write_char(&wb, 'X')
- && api_ws_write_uint32(&wb, wreq->msgid)
- && api_ws_write_uint32(&wb, (uint32_t)wreq->context.flags)
- && api_ws_write_string_length(&wb, buffer, size)) {
- rc = afb_ws_binary_v(wreq->client->ws, wb.iovec, wb.count);
- if (rc >= 0)
- return;
+ const char *api;
+ struct api_ws_server *apiws;
+ size_t luri, lapi, extra;
+
+ /* check the size */
+ luri = strlen(uri);
+ if (luri > 4000) {
+ ERROR("can't create socket %s", uri);
+ errno = E2BIG;
+ return -1;
}
- ERROR("error while sending raw");
-}
-
-static int api_ws_server_req_subscribe_cb(void *closure, struct afb_event event)
-{
- int rc, rc2;
- struct writebuf wb = { .count = 0 };
- struct api_ws_server_req *wreq = closure;
-
- rc = afb_evt_add_watch(wreq->client->listener, event);
- if (rc < 0)
- return rc;
- if (api_ws_write_char(&wb, 'S')
- && api_ws_write_uint32(&wb, wreq->msgid)
- && api_ws_write_uint32(&wb, (uint32_t)afb_evt_event_id(event))
- && api_ws_write_string(&wb, afb_evt_event_name(event))) {
- rc2 = afb_ws_binary_v(wreq->client->ws, wb.iovec, wb.count);
- if (rc2 >= 0)
- goto success;
+ /* check the api name */
+ api = afb_socket_api(uri);
+ if (api == NULL || !afb_api_is_valid_name(api)) {
+ ERROR("invalid api name in ws uri %s", uri);
+ errno = EINVAL;
+ goto error;
}
- ERROR("error while subscribing event");
-success:
- return rc;
-}
-
-static int api_ws_server_req_unsubscribe_cb(void *closure, struct afb_event event)
-{
- int rc, rc2;
- struct writebuf wb = { .count = 0 };
- struct api_ws_server_req *wreq = closure;
- if (api_ws_write_char(&wb, 'U')
- && api_ws_write_uint32(&wb, wreq->msgid)
- && api_ws_write_uint32(&wb, (uint32_t)afb_evt_event_id(event))
- && api_ws_write_string(&wb, afb_evt_event_name(event))) {
- rc2 = afb_ws_binary_v(wreq->client->ws, wb.iovec, wb.count);
- if (rc2 >= 0)
- goto success;
+ /* check api name */
+ if (!afb_apiset_lookup(call_set, api, 1)) {
+ ERROR("Can't provide ws-server for URI %s: API %s doesn't exist", uri, api);
+ errno = ENOENT;
+ goto error;
}
- ERROR("error while subscribing event");
-success:
- rc = afb_evt_remove_watch(wreq->client->listener, event);
- return rc;
-}
-
-static void api_ws_server_req_subcall_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
-{
- struct api_ws_server_req *wreq = closure;
- afb_subcall(&wreq->context, api, verb, args, callback, cb_closure, (struct afb_req){ .itf = &afb_api_ws_req_itf, .closure = wreq });
-}
-
-/******************* server part **********************************/
-
-static int api_ws_server_connect(struct api_ws *api);
-
-static int api_ws_server_listen_callback(sd_event_source *src, int fd, uint32_t revents, void *closure)
-{
- if ((revents & EPOLLIN) != 0)
- api_ws_server_accept(closure);
- if ((revents & EPOLLHUP) != 0)
- api_ws_server_connect(closure);
- return 0;
-}
-static void api_ws_server_disconnect(struct api_ws *api)
-{
- if (api->server.listensrc != NULL) {
- sd_event_source_unref(api->server.listensrc);
- api->server.listensrc = NULL;
- }
- if (api->fd >= 0) {
- close(api->fd);
- api->fd = -1;
+ /* make the structure */
+ lapi = strlen(api);
+ extra = luri == (api - uri) + lapi ? 0 : lapi + 1;
+ apiws = malloc(sizeof * apiws + 1 + luri + extra);
+ if (!apiws) {
+ ERROR("out of memory");
+ errno = ENOMEM;
+ goto error;
}
-}
-static int api_ws_server_connect(struct api_ws *api)
-{
- int rc;
-
- /* ensure disconnected */
- api_ws_server_disconnect(api);
-
- /* request the service object name */
- api->fd = api_ws_socket(api->path, 1);
- if (api->fd < 0)
- ERROR("can't create socket %s", api->path);
+ apiws->apiset = afb_apiset_addref(call_set);
+ apiws->fdev = 0;
+ strcpy(apiws->uri, uri);
+ if (!extra)
+ apiws->offapi = (uint16_t)(api - uri);
else {
- /* listen for service */
- rc = sd_event_add_io(afb_common_get_event_loop(), &api->server.listensrc, api->fd, EPOLLIN, api_ws_server_listen_callback, api);
- if (rc >= 0)
- return 0;
- close(api->fd);
- errno = -rc;
- ERROR("can't add ws object %s", api->path);
+ apiws->offapi = (uint16_t)(luri + 1);
+ strcpy(&apiws->uri[apiws->offapi], api);
}
- return -1;
-}
-
-/* create the service */
-int afb_api_ws_add_server(const char *path)
-{
- int rc;
- struct api_ws *api;
-
- /* creates the ws api object */
- api = api_ws_make(path);
- if (api == NULL)
- goto error;
/* connect for serving */
- rc = api_ws_server_connect(api);
- if (rc < 0)
- goto error2;
-
- return 0;
+ rc = api_ws_server_connect(apiws);
+ if (rc >= 0)
+ return 0;
-error2:
- free(api);
+ afb_apiset_unref(apiws->apiset);
+ free(apiws);
error:
return -1;
}
-
-
Code Review / src / app-framework-binder.git / blobdiff