libustcomm/ustcomm.h

   1 /* Copyright (C) 2009  Pierre-Marc Fournier
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  16  */
  17
  18 #ifndef USTCOMM_H
  19 #define USTCOMM_H
  20
  21 #include <sys/types.h>
  22 #include <sys/un.h>
  23
  24 #include "kcompat.h"
  25
  26 #define SOCK_DIR "/tmp/ust-app-socks"
  27 #define UST_SIGNAL SIGIO
  28
  29 struct ustcomm_connection {
  30         struct list_head list;
  31         int fd;
  32         /* Data that has not yet been consumed: */
  33         char *recv_buf;
  34         int recv_buf_size;
  35         int recv_buf_alloc;
  36 };
  37
  38 /* ustcomm_server must be shallow-copyable */
  39 struct ustcomm_server {
  40         /* the "server" socket for serving the external requests */
  41         int listen_fd;
  42         char *socketpath;
  43
  44         struct list_head connections;
  45 };
  46
  47 struct ustcomm_ustd {
  48         struct ustcomm_server server;
  49 };
  50
  51 struct ustcomm_app {
  52         struct ustcomm_server server;
  53 };
  54
  55 /* ustcomm_source must be shallow-copyable */
  56 struct ustcomm_source {
  57         int fd;
  58         void *priv;
  59 };
  60
  61 extern char *strdup_malloc(const char *s);
  62
  63 //int send_message_pid(pid_t pid, const char *msg, char **reply);
  64 extern int ustcomm_request_consumer(pid_t pid, const char *channel);
  65
  66 extern int ustcomm_ustd_recv_message(struct ustcomm_ustd *ustd, char **msg, struct ustcomm_source *src, int timeout);
  67 extern int ustcomm_app_recv_message(struct ustcomm_app *app, char **msg, struct ustcomm_source *src, int timeout);
  68
  69 extern int ustcomm_init_app(pid_t pid, struct ustcomm_app *handle);
  70 extern void ustcomm_fini_app(struct ustcomm_app *handle, int keep_socket_file);
  71 extern void ustcomm_fini_ustd(struct ustcomm_ustd *handle);
  72
  73 extern int ustcomm_init_ustd(struct ustcomm_ustd *handle, const char *sock_path);
  74
  75 extern int ustcomm_connect_app(pid_t pid, struct ustcomm_connection *conn);
  76 extern int ustcomm_close_app(struct ustcomm_connection *conn);
  77 extern int ustcomm_connect_path(const char *path, struct ustcomm_connection *conn, pid_t signalpid);
  78 extern int ustcomm_send_request(struct ustcomm_connection *conn, const char *req, char **reply);
  79 extern int ustcomm_send_reply(struct ustcomm_server *server, char *msg, struct ustcomm_source *src);
  80 extern int ustcomm_disconnect(struct ustcomm_connection *conn);
  81 extern int ustcomm_close_all_connections(struct ustcomm_server *server);
  82
  83 extern int nth_token_is(const char *str, const char *token, int tok_no);
  84
  85 extern char *nth_token(const char *str, int tok_no);
  86
  87 extern int pid_is_online(pid_t);
  88
  89 #endif /* USTCOMM_H */