Merge branch 'ph3-module-support'

src/Makefile.am

@@ -30,6 +30,7 @@ noinst_HEADERS = \
     matchfile.h \
     tls.h \
     refobject.h \
+    module.h \
     event.h \
     event_log.h \
     event_exec.h \
@@ -70,6 +71,7 @@ icecast_SOURCES = \
     matchfile.c \
     tls.c \
     refobject.c \
+    module.c \
     format.c \
     format_ogg.c \
     format_mp3.c \

src/cfgfile.c

@@ -562,6 +562,8 @@ static void config_clear_resource(resource_t *resource)
         xmlFree(resource->destination);
         xmlFree(resource->bind_address);
         xmlFree(resource->vhost);
+        xmlFree(resource->module);
+        xmlFree(resource->handler);
         free(resource);
         resource = nextresource;
     }
@@ -1948,6 +1950,9 @@ static void _parse_resource(xmlDocPtr      doc,
 
     resource->vhost = (char *)xmlGetProp(node, XMLSTR("vhost"));
 
+    resource->module = (char *)xmlGetProp(node, XMLSTR("module"));
+    resource->handler = (char *)xmlGetProp(node, XMLSTR("handler"));
+
     temp = (char *)xmlGetProp(node, XMLSTR("omode"));
     if (temp) {
         resource->omode = config_str_to_omode(temp);

src/cfgfile.h

@@ -139,6 +139,8 @@ typedef struct _resource {
     int port;
     char *bind_address;
     char *vhost;
+    char *module;
+    char *handler;
     operation_mode omode;
     unsigned int flags;
     struct _resource *next;

src/client.c

@@ -29,6 +29,7 @@
 #include "common/httpp/httpp.h"
 
 #include "global.h"
+#include "refobject.h"
 #include "cfgfile.h"
 #include "connection.h"
 #include "refbuf.h"
@@ -171,6 +172,8 @@ void client_destroy(client_t *client)
     if (client->free_client_data)
         client->free_client_data(client);
 
+    refobject_unref(client->handler_module);
+    free(client->handler_function);
     free(client->username);
     free(client->password);
     free(client->role);

src/client.h

@@ -25,6 +25,7 @@
 #include "icecasttypes.h"
 #include "errors.h"
 #include "refbuf.h"
+#include "module.h"
 
 #define CLIENT_DEFAULT_ADMIN_FORMAT                     ADMIN_FORMAT_TRANSFORMED
 
@@ -82,6 +83,10 @@ struct _client_tag {
     /* active ACL, set as soon as the client is authenticated */
     acl_t *acl;
 
+    /* Handler module and function */
+    module_t *handler_module;
+    char *handler_function;
+
     /* is client getting intro data */
     long intro_offset;
 

src/connection.c

@@ -43,6 +43,7 @@
 #include "cfgfile.h"
 #include "global.h"
 #include "util.h"
+#include "refobject.h"
 #include "refbuf.h"
 #include "client.h"
 #include "errors.h"
@@ -1135,6 +1136,28 @@ static int _handle_resources(client_t *client, char **uri)
         }
         if (resource->omode != OMODE_DEFAULT)
             client->mode = resource->omode;
+
+        if (resource->module) {
+            module_t *module = module_container_get_module(global.modulecontainer, resource->module);
+
+            if (module != NULL) {
+                refobject_unref(client->handler_module);
+                client->handler_module = module;
+            } else {
+                ICECAST_LOG_ERROR("Module used in alias not found: %s", resource->module);
+            }
+        }
+
+        if (resource->handler) {
+            char *func = strdup(resource->handler);
+            if (func) {
+                free(client->handler_function);
+                client->handler_function = func;
+            } else {
+                ICECAST_LOG_ERROR("Can not allocate memory.");
+            }
+        }
+
         ICECAST_LOG_DEBUG("resource has made %s into %s", *uri, new_uri);
         break;
     }
@@ -1193,6 +1216,17 @@ static void _handle_authed_client(client_t *client, void *uri, auth_result resul
         return;
     }
 
+    if (client->handler_module && client->handler_function) {
+        const module_client_handler_t *handler = module_get_client_handler(client->handler_module, client->handler_function);
+        if (handler) {
+            handler->cb(client->handler_module, client, uri);
+            free(uri);
+            return;
+        } else {
+            ICECAST_LOG_ERROR("No such handler function in module: %s", client->handler_function);
+        }
+    }
+
     switch (client->parser->req_type) {
         case httpp_req_source:
         case httpp_req_put:

src/global.c

@@ -21,6 +21,8 @@
 #include "common/avl/avl.h"
 
 #include "global.h"
+#include "refobject.h"
+#include "module.h"
 #include "source.h"
 
 ice_global_t global;
@@ -36,12 +38,14 @@ void global_initialize(void)
     global.clients = 0;
     global.sources = 0;
     global.source_tree = avl_tree_new(source_compare_sources, NULL);
+    global.modulecontainer = module_container_new();
     thread_mutex_create(&_global_mutex);
 }
 
 void global_shutdown(void)
 {
     thread_mutex_destroy(&_global_mutex);
+    refobject_unref(global.modulecontainer);
     avl_tree_free(global.source_tree, NULL);
 }
 

src/global.h

@@ -42,6 +42,8 @@ typedef struct ice_global_tag
     /* relays retrieved from master */
     relay_server *master_relays;
 
+    module_container_t *modulecontainer;
+
     cond_t shutdown_cond;
 } ice_global_t;
 

src/icecasttypes.h

@@ -92,6 +92,12 @@ typedef enum {
 
 typedef struct _relay_server relay_server;
 
+/* ---[ module.[ch] ]--- */
+
+typedef struct module_tag module_t;
+
+typedef struct module_container_tag module_container_t;
+
 /* ---[ refobject.[ch] ]--- */
 
 typedef struct refobject_base_tag refobject_base_t;
@@ -99,6 +105,8 @@ typedef struct refobject_base_tag refobject_base_t;
 #ifdef HAVE_TYPE_ATTRIBUTE_TRANSPARENT_UNION
 typedef union __attribute__ ((__transparent_union__)) {
     refobject_base_t *refobject_base;
+    module_t *module;
+    module_container_t *module_container;
 } refobject_t;
 #else
 typedef void * refobject_t;

src/main.c

@@ -122,12 +122,12 @@ static void initialize_subsystems(void)
 {
     log_initialize();
     thread_initialize();
+    global_initialize();
     sock_initialize();
     resolver_initialize();
     config_initialize();
     tls_initialize();
     connection_initialize();
-    global_initialize();
     refbuf_initialize();
 
     xslt_initialize();
@@ -146,12 +146,12 @@ static void shutdown_subsystems(void)
     yp_shutdown();
     stats_shutdown();
 
-    global_shutdown();
     connection_shutdown();
     tls_shutdown();
     config_shutdown();
     resolver_shutdown();
     sock_shutdown();
+    global_shutdown();
     thread_shutdown();
 
 #ifdef HAVE_CURL

src/module.c

@@ -0,0 +1,184 @@
+/* Icecast
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright 2018,      Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "common/thread/thread.h"
+#include "common/avl/avl.h"
+
+#include "refobject.h"
+#include "module.h"
+
+struct module_tag {
+    refobject_base_t __base;
+    mutex_t lock;
+    const module_client_handler_t *client_handlers;
+    size_t client_handlers_len;
+    module_setup_handler_t freecb;
+    void *userdata;
+};
+
+
+struct module_container_tag {
+    refobject_base_t __base;
+    mutex_t lock;
+    avl_tree *module;
+};
+
+static int compare_refobject_t_name(void *arg, void *a, void *b)
+{
+    return strcmp(refobject_get_name(a), refobject_get_name(b));
+}
+
+static void __module_container_free(refobject_t self, void **userdata)
+{
+    module_container_t *cont = REFOBJECT_TO_TYPE(self, module_container_t *);
+    thread_mutex_destroy(&(cont->lock));
+    avl_tree_free(cont->module, (avl_free_key_fun_type)refobject_unref);
+}
+
+module_container_t *    module_container_new(void)
+{
+    module_container_t *ret = REFOBJECT_TO_TYPE(refobject_new(sizeof(module_container_t), __module_container_free, NULL, NULL, NULL), module_container_t *);
+
+    if (!ret)
+        return NULL;
+
+    thread_mutex_create(&(ret->lock));
+
+    ret->module = avl_tree_new(compare_refobject_t_name, NULL);
+
+    return ret;
+}
+
+int                     module_container_add_module(module_container_t *self, module_t *module)
+{
+    if (!self)
+        return -1;
+
+    if (refobject_ref(module) != 0)
+        return -1;
+
+    thread_mutex_lock(&(self->lock));
+    avl_insert(self->module, module);
+    thread_mutex_unlock(&(self->lock));
+
+    return 0;
+}
+
+int                     module_container_delete_module(module_container_t *self, const char *name)
+{
+    module_t *module;
+
+    if (!self || !name)
+        return -1;
+
+    module = module_container_get_module(self, name);
+    if (!module)
+        return -1;
+
+    thread_mutex_lock(&(self->lock));
+    avl_delete(self->module, module, (avl_free_key_fun_type)refobject_unref);
+    thread_mutex_unlock(&(self->lock));
+
+    refobject_unref(module);
+
+    return 0;
+}
+
+module_t *              module_container_get_module(module_container_t *self, const char *name)
+{
+    refobject_t search;
+    module_t *ret;
+
+    if (!self || !name)
+        return NULL;
+
+    search = refobject_new(sizeof(refobject_base_t), NULL, NULL, name, NULL);
+
+    if (avl_get_by_key(self->module, REFOBJECT_TO_TYPE(search, void *), (void**)&ret) != 0) {
+        ret = NULL;
+    }
+
+    refobject_unref(search);
+    refobject_ref(ret);
+
+    return ret;
+}
+
+static void __module_free(refobject_t self, void **userdata)
+{
+    module_t *mod = REFOBJECT_TO_TYPE(self, module_t *);
+
+    if (mod->freecb)
+        mod->freecb(mod, &(mod->userdata));
+
+    if (mod->userdata)
+        free(mod->userdata);
+
+    thread_mutex_destroy(&(mod->lock));
+}
+
+module_t *              module_new(const char *name, module_setup_handler_t newcb, module_setup_handler_t freecb, void *userdata)
+{
+    module_t *ret = REFOBJECT_TO_TYPE(refobject_new(sizeof(module_t), __module_free, NULL, name, NULL), module_t *);
+
+    if (!ret)
+        return NULL;
+
+    thread_mutex_create(&(ret->lock));
+
+    ret->userdata = userdata;
+    ret->freecb = freecb;
+
+    if (newcb) {
+        if (newcb(ret, &(ret->userdata)) != 0) {
+            refobject_unref(ret);
+            return NULL;
+        }
+    }
+
+    return ret;
+}
+
+const module_client_handler_t * module_get_client_handler(module_t *self, const char *name)
+{
+    size_t i;
+
+    if (!self || !name)
+        return NULL;
+
+    thread_mutex_lock(&(self->lock));
+    for (i = 0; i < self->client_handlers_len; i++) {
+        if (self->client_handlers[i].name && strcmp(self->client_handlers[i].name, name) == 0) {
+            thread_mutex_unlock(&(self->lock));
+            return &(self->client_handlers[i]);
+        }
+    }
+    thread_mutex_unlock(&(self->lock));
+
+    return NULL;
+}
+
+int                             module_add_client_handler(module_t *self, const module_client_handler_t *handlers, size_t len)
+{
+    if (!self)
+        return -1;
+
+    thread_mutex_lock(&(self->lock));
+    self->client_handlers = handlers;
+    self->client_handlers_len = len;
+    thread_mutex_unlock(&(self->lock));
+
+    return 0;
+}

src/module.h

@@ -0,0 +1,33 @@
+/* Icecast
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright 2018,      Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
+ */
+
+#ifndef __MODULE_H__
+#define __MODULE_H__
+
+#include "icecasttypes.h"
+
+typedef void (*module_client_handler_function_t)(module_t *self, client_t *client, const char *uri);
+typedef int  (*module_setup_handler_t)(module_t *self, void **userdata);
+
+typedef struct {
+    const char *name;
+    module_client_handler_function_t cb;
+} module_client_handler_t;
+
+module_container_t *            module_container_new(void);
+int                             module_container_add_module(module_container_t *self, module_t *module);
+int                             module_container_delete_module(module_container_t *self, const char *name);
+module_t *                      module_container_get_module(module_container_t *self, const char *name);
+
+module_t *                      module_new(const char *name, module_setup_handler_t newcb, module_setup_handler_t freecb, void *userdata);
+
+/* Note: Those functions are not really thread safe as (module_client_handler_t) is not thread safe. This is by design. */
+const module_client_handler_t * module_get_client_handler(module_t *self, const char *name);
+int                             module_add_client_handler(module_t *self, const module_client_handler_t *handlers, size_t len);
+
+#endif