2 alsajson-gw -- provide a REST/HTTP interface to ALSA-Mixer
4 Copyright (C) 2015, Fulup Ar Foll
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include <sys/ioctl.h>
34 #include <sys/signal.h>
35 #include <sys/types.h>
38 #include <microhttpd.h>
42 #include <uuid/uuid.h>
47 #define AJQ_VERSION "0.1"
49 /* other definitions --------------------------------------------------- */
51 // Note: because of a bug in libmagic MAGIC_DB NULL should not be used for default
52 #define MAGIC_DB "/usr/share/misc/magic.mgc"
53 #define OPA_INDEX "index.html"
54 #define MAX_ALIAS 10 // max number of aliases
55 #define COOKIE_NAME "AJB_session"
58 #define DEFLT_CNTX_TIMEOUT 3600 // default Client Connection Timeout
59 #define DEFLT_API_TIMEOUT 0 // default Plugin API Timeout [0=NoLimit for Debug Only]
60 #define DEFLT_API_TIMEOUT 0 // default Plugin API Timeout
61 #define DEFLT_CACHE_TIMEOUT 100000 // default Static File Chache [Client Side Cache 100000~=1day]
62 #define DEFLT_AUTH_TOKEN NULL // expect for debug should == NULL
63 #define DEFLT_HTTP_TIMEOUT 15 // Max MibMicroHttp timeout
77 extern int verbose; // this is the only global variable
80 typedef enum {AFB_PLUGIN_JSON=123456789, AFB_PLUGIN_JSCRIPT=987654321, AFB_PLUGIN_RAW=987123546} AFB_pluginE;
82 // prebuild json error are constructed in config.c
83 typedef enum { AFB_FALSE, AFB_TRUE, AFB_FATAL, AFB_FAIL, AFB_WARNING, AFB_EMPTY, AFB_SUCCESS, AFB_DONE, AFB_UNAUTH} AFB_error;
85 extern char *ERROR_LABEL[];
86 #define ERROR_LABEL_DEF {"false", "true","fatal", "fail", "warning", "empty", "success"}
88 #define BANNER "<html><head><title>Application Framework Binder</title></head><body>Application Framework </body></html>"
89 #define JSON_CONTENT "application/json"
90 #define FORM_CONTENT "multipart/form-data"
91 #define MAX_POST_SIZE 4096 // maximum size for POST data
92 #define CTX_NBCLIENTS 10 // allow a default of 10 authenticated clients
95 typedef json_object* (*AFB_apiCB)();
97 // Error code are requested through function to manage json usage count
104 typedef enum {AFB_POST_NONE=0, AFB_POST_JSON, AFB_POST_FORM} AFB_PostType;
107 int len; // post element size
108 char *data; // post data in raw format
109 AFB_PostType type; // Json type
114 void* ctx; // Application context
115 int len; // current len for post
116 int uid; // post uid for debug
117 AFB_PostType type; // JSON or FORM
118 AFB_apiCB completeCB; // callback when post is completed
119 char *private; // use internally to keep track or partial buffer
120 struct MHD_PostProcessor *pp; // iterator handle
124 enum MHD_ValueKind kind; // kind type of the value
125 const char *key; // key 0-terminated key for the value
126 const char *filename; // filename of the uploaded file, NULL if not known
127 const char *mimetype; // content_type mime-type of the data, NULL if not known
128 const char *encoding; // transfer_encoding encoding of the data, NULL if not known
129 const char *data; // data pointer to size bytes of data at the specified offset
130 uint64_t offset; // offset of data in the overall value
131 size_t len; // number of bytes in data available
145 // Command line structure hold cli --command + help text
147 int val; // command number within application
148 int has_arg; // command number within application
149 char *name; // command as used in --xxxx cli
150 char *help; // help text
153 // main config structure
155 char *logname; // logfile path for info & error log
156 char *console; // console device name (can be a file or a tty)
159 char *smack; // smack label
160 char *plugins; // list of requested plugins
161 char *rootdir; // base dir for httpd file download
162 char *rootbase; // Angular HTML5 base URL
163 char *rootapi; // Base URL for REST APIs
164 char *pidfile; // where to store pid when running background
165 char *sessiondir; // where to store mixer session files
166 char *configfile; // where to store configuration on gateway exit
167 char *setuid; // downgrade uid to username
168 char *token; // initial authentication token [default NULL no session]
171 int cntxTimeout; // Client Session Context timeout
172 AFB_aliasdir *aliasdir; // alias mapping for icons,apps,...
176 int len; // command number within application
186 // Enum for Session/Token/Authentication middleware
187 typedef enum {AFB_SESSION_NONE, AFB_SESSION_CREATE, AFB_SESSION_CLOSE, AFB_SESSION_RENEW, AFB_SESSION_CHECK} AFB_sessionE;
192 AFB_sessionE session;
195 AFB_privateApi *private;
208 AFB_apiCB freeCtxCB; // callback to free application context [null for standard free]
212 // User Client Session Context
214 int cid; // index 0 if global
215 char uuid[37]; // long term authentication of remote client
216 char token[37]; // short term authentication of remote client
217 time_t timeStamp; // last time token was refresh
218 int restfull; // client does not use cookie
219 void *ctx; // application specific context
220 AFB_plugin *plugin; // provide callback and easy access to plugin
223 // MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "value");
228 AFB_PostRequest *post;
230 AFB_clientCtx *client; // needed because libmicrohttp cannot create an empty response
231 int restfull; // request is resfull [uuid token provided]
232 int errcode; // http error code
233 sigjmp_buf checkPluginCall; // context save for timeout set/longjmp
234 AFB_config *config; // plugin may need access to config
235 struct MHD_Connection *connection;
236 AFB_plugin **plugins;
241 AFB_config *config; // pointer to current config
242 // List of commands to execute
244 int background; // run in backround mode
245 int foreground; // run in forground mode
246 int configsave; // Save config on disk on start
247 char *cacheTimeout; // http require timeout to be a string
248 void *httpd; // anonymous structure for httpd handler
249 int fakemod; // respond to GET/POST request without interacting with sndboard
250 int forceexit; // when autoconfig from script force exit before starting server
251 AFB_plugin **plugins; // pointer to REST/API plugins
252 magic_t magic; // Mime type file magic lib
253 sigjmp_buf restartCkpt; // context save for restart set/longjmp
258 #include "proto-def.h"