/*
- * Copyright (C) 2016 "IoT.bzh"
+ * Copyright (C) 2016, 2017 "IoT.bzh"
* Author "Fulup Ar Foll"
* Author José Bollo <jose.bollo@iot.bzh>
*
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <errno.h>
-#include "session.h"
+#include "afb-session.h"
#include "verbose.h"
#include "afb-apis.h"
#include "afb-context.h"
-#include "afb-hook.h"
+#include "afb-xreq.h"
+#include "jobs.h"
+
#include <afb/afb-req-itf.h>
+/**
+ * Internal description of an api
+ */
struct api_desc {
- struct afb_api api;
- const char *name;
- size_t namelen;
+ const char *name; /**< name of the api */
+ struct afb_api api; /**< handler of the api */
};
static struct api_desc *apis_array = NULL;
static int apis_count = 0;
+static int apis_timeout = 15;
-int afb_apis_count()
+/**
+ * Set the API timeout
+ * @param to the timeout in seconds
+ */
+void afb_apis_set_timeout(int to)
{
- return apis_count;
+ apis_timeout = to;
}
+/**
+ * Checks wether 'name' is a valid API name.
+ * @return 1 if valid, 0 otherwise
+ */
int afb_apis_is_valid_api_name(const char *name)
{
unsigned char c;
c = (unsigned char)*name;
if (c == 0)
+ /* empty names aren't valid */
return 0;
+
do {
if (c < (unsigned char)'\x80') {
switch(c) {
return 1;
}
+/**
+ * Adds the api of 'name' described by 'api'.
+ * @param name the name of the api to add (have to survive, not copied!)
+ * @param api the api
+ * @returns 0 in case of success or -1 in case
+ * of error with errno set:
+ * - EINVAL if name isn't valid
+ * - EEXIST if name already registered
+ * - ENOMEM when out of memory
+ */
int afb_apis_add(const char *name, struct afb_api api)
{
struct api_desc *apis;
- int i;
+ int i, c;
/* Checks the api name */
if (!afb_apis_is_valid_api_name(name)) {
ERROR("invalid api name forbidden (name is '%s')", name);
+ errno = EINVAL;
goto error;
}
/* check previously existing plugin */
for (i = 0 ; i < apis_count ; i++) {
- if (!strcasecmp(apis_array[i].name, name)) {
+ c = strcasecmp(apis_array[i].name, name);
+ if (c == 0) {
ERROR("api of name %s already exists", name);
+ errno = EEXIST;
goto error;
}
+ if (c > 0)
+ break;
}
/* allocates enough memory */
apis = realloc(apis_array, ((unsigned)apis_count + 1) * sizeof * apis);
if (apis == NULL) {
ERROR("out of memory");
+ errno = ENOMEM;
goto error;
}
apis_array = apis;
+ /* copy higher part of the array */
+ c = apis_count;
+ while (c > i) {
+ apis_array[c] = apis_array[c - 1];
+ c--;
+ }
+
/* record the plugin */
- apis = &apis_array[apis_count];
+ apis = &apis_array[i];
apis->api = api;
- apis->namelen = strlen(name);
apis->name = name;
apis_count++;
+ NOTICE("API %s added", name);
+
return 0;
error:
return -1;
}
-void afb_apis_call_(struct afb_req req, struct afb_context *context, const char *api, const char *verb)
-{
- afb_apis_call(req, context, api, strlen(api), verb, strlen(verb));
-}
-
-void afb_apis_call(struct afb_req req, struct afb_context *context, const char *api, size_t lenapi, const char *verb, size_t lenverb)
+/**
+ * Search the 'api'.
+ * @param api the api of the verb
+ * @return the descriptor if found or NULL otherwise
+ */
+static const struct api_desc *search(const char *api)
{
- int i;
+ int i, c, up, lo;
const struct api_desc *a;
- req = afb_hook_req_call(req, context, api, lenapi, verb, lenverb);
- a = apis_array;
- for (i = 0 ; i < apis_count ; i++, a++) {
- if (a->namelen == lenapi && !strncasecmp(a->name, api, lenapi)) {
- context->api_index = i;
- a->api.call(a->api.closure, req, context, verb, lenverb);
- return;
+ /* dichotomic search of the api */
+ /* initial slice */
+ lo = 0;
+ up = apis_count;
+ for (;;) {
+ /* check remaining slice */
+ if (lo >= up) {
+ /* not found */
+ return NULL;
+ }
+ /* check the mid of the slice */
+ i = (lo + up) >> 1;
+ a = &apis_array[i];
+ c = strcasecmp(a->name, api);
+ if (c == 0) {
+ /* found */
+ return a;
}
+ /* update the slice */
+ if (c < 0)
+ lo = i + 1;
+ else
+ up = i;
}
- afb_req_fail(req, "fail", "api not found");
}
+/**
+ * Starts a service by its 'api' name.
+ * @param api name of the service to start
+ * @param share_session if true start the servic"e in a shared session
+ * if false start it in its own session
+ * @param onneed if true start the service if possible, if false the api
+ * must be a service
+ * @return a positive number on success
+ */
int afb_apis_start_service(const char *api, int share_session, int onneed)
{
int i;
for (i = 0 ; i < apis_count ; i++) {
if (!strcasecmp(apis_array[i].name, api))
- return apis_array[i].api.service_start(apis_array[i].api.closure, share_session, onneed);
+ return apis_array[i].api.itf->service_start(apis_array[i].api.closure, share_session, onneed);
}
ERROR("can't find service %s", api);
+ errno = ENOENT;
return -1;
}
+/**
+ * Starts all possible services but stops at first error.
+ * @param share_session if true start the servic"e in a shared session
+ * if false start it in its own session
+ * @return 0 on success or a negative number when an error is found
+ */
int afb_apis_start_all_services(int share_session)
{
int i, rc;
for (i = 0 ; i < apis_count ; i++) {
- rc = apis_array[i].api.service_start(apis_array[i].api.closure, share_session, 1);
+ rc = apis_array[i].api.itf->service_start(apis_array[i].api.closure, share_session, 1);
if (rc < 0)
return rc;
}
return 0;
}
+/**
+ * Internal direct dispatch of the request 'xreq'
+ * @param xreq the request to dispatch
+ */
+static void do_call_direct(struct afb_xreq *xreq)
+{
+ const struct api_desc *a;
+
+ /* search the api */
+ a = search(xreq->api);
+ if (!a)
+ afb_xreq_fail_f(xreq, "unknown-api", "api %s not found", xreq->api);
+ else {
+ xreq->context.api_key = a->api.closure;
+ a->api.itf->call(a->api.closure, xreq);
+ }
+}
+
+/**
+ * Asynchronous dispatch callback for the request 'xreq'
+ * @param signum 0 on normal flow or the signal number that interupted the normal flow
+ */
+static void do_call_async(int signum, void *arg)
+{
+ struct afb_xreq *xreq = arg;
+
+ if (signum != 0)
+ afb_xreq_fail_f(xreq, "aborted", "signal %s(%d) caught", strsignal(signum), signum);
+ else {
+ do_call_direct(xreq);
+ }
+ afb_xreq_unref(xreq);
+}
+
+/**
+ * Dispatch the request 'xreq' synchronously and directly.
+ * @param xreq the request to dispatch
+ */
+void afb_apis_call_direct(struct afb_xreq *xreq)
+{
+ afb_xreq_begin(xreq);
+ do_call_direct(xreq);
+}
+
+/**
+ * Dispatch the request 'xreq' asynchronously.
+ * @param xreq the request to dispatch
+ */
+void afb_apis_call(struct afb_xreq *xreq)
+{
+ int rc;
+
+ afb_xreq_begin(xreq);
+ afb_xreq_addref(xreq);
+ rc = jobs_queue(NULL, apis_timeout, do_call_async, xreq);
+ if (rc < 0) {
+ /* TODO: allows or not to proccess it directly as when no threading? (see above) */
+ ERROR("can't process job with threads: %m");
+ afb_xreq_fail_f(xreq, "cancelled", "not able to create a job for the task");
+ afb_xreq_unref(xreq);
+ }
+}
+
+/**
+ * Ask to update the hook flags of the 'api'
+ * @param api the api to update (NULL updates all)
+ */
+void afb_apis_update_hooks(const char *api)
+{
+ const struct api_desc *i, *e;
+
+ if (!api) {
+ i = apis_array;
+ e = &apis_array[apis_count];
+ } else {
+ i = search(api);
+ e = &i[!!i];
+ }
+ while (i != e) {
+ if (i->api.itf->update_hooks)
+ i->api.itf->update_hooks(i->api.closure);
+ i++;
+ }
+}
+
+/**
+ * Set the verbosity level of the 'api'
+ * @param api the api to set (NULL set all)
+ */
+void afb_apis_set_verbosity(const char *api, int level)
+{
+ const struct api_desc *i, *e;
+
+ if (!api) {
+ i = apis_array;
+ e = &apis_array[apis_count];
+ } else {
+ i = search(api);
+ e = &i[!!i];
+ }
+ while (i != e) {
+ if (i->api.itf->set_verbosity)
+ i->api.itf->set_verbosity(i->api.closure, level);
+ i++;
+ }
+}
+
+/**
+ * Set the verbosity level of the 'api'
+ * @param api the api to set (NULL set all)
+ */
+int afb_apis_get_verbosity(const char *api)
+{
+ const struct api_desc *i;
+
+ i = api ? search(api) : NULL;
+ if (!i) {
+ errno = ENOENT;
+ return -1;
+ }
+ if (!i->api.itf->get_verbosity)
+ return 0;
+
+ return i->api.itf->get_verbosity(i->api.closure);
+}
+
+/**
+ * Get the list of api names
+ * @return a NULL terminated array of api names. Must be freed.
+ */
+const char **afb_apis_get_names()
+{
+ size_t size;
+ char *dest;
+ const char **names;
+ int i;
+
+ size = apis_count * (1 + sizeof(*names)) + sizeof(*names);
+ for (i = 0 ; i < apis_count ; i++)
+ size += strlen(apis_array[i].name);
+
+ names = malloc(size);
+ if (!names)
+ errno = ENOMEM;
+ else {
+ dest = (void*)&names[apis_count+1];
+ for (i = 0 ; i < apis_count ; i++) {
+ names[i] = dest;
+ dest = stpcpy(dest, apis_array[i].name) + 1;
+ }
+ names[i] = NULL;
+ }
+ return names;
+}
+
Code Review / src / app-framework-binder.git / blobdiff