182 lines
4.9 KiB
C
182 lines
4.9 KiB
C
#ifndef __IPC_H__
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#define __IPC_H__
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#include <stdint.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h> // error numbers
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#include <time.h>
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#define RUNDIR "/run/ipc/"
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#define PATH_MAX 4096
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#define IPC_HEADER_SIZE 5
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#define IPC_MAX_MESSAGE_SIZE 8000000-IPC_HEADER_SIZE
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// #define IPC_MAX_MESSAGE_SIZE 100-IPC_HEADER_SIZE
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// #include "queue.h"
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#define IPC_VERSION 1
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enum msg_types {
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MSG_TYPE_SERVER_CLOSE = 0
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, MSG_TYPE_ERR
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, MSG_TYPE_DATA
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} message_types;
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enum ipc_event_type {
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IPC_EVENT_TYPE_NOT_SET
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, IPC_EVENT_TYPE_ERROR
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, IPC_EVENT_TYPE_STDIN
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, IPC_EVENT_TYPE_CONNECTION
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, IPC_EVENT_TYPE_DISCONNECTION
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, IPC_EVENT_TYPE_MESSAGE
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};
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enum ipc_errors {
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IPC_ERROR_NOT_ENOUGH_MEMORY
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, IPC_ERROR_WRONG_PARAMETERS
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, IPC_ERROR_READ
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};
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struct ipc_service {
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uint32_t version;
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uint32_t index;
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char spath[PATH_MAX];
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int32_t service_fd;
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};
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struct ipc_services {
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struct ipc_service ** services;
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int32_t size;
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};
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struct ipc_client {
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uint32_t version;
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uint32_t index;
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int32_t proc_fd;
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};
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struct ipc_clients {
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struct ipc_client **clients;
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int32_t size;
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};
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struct ipc_message {
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char type;
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uint32_t length;
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char *payload;
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};
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struct ipc_event {
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enum ipc_event_type type;
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void* origin; // currently used as an client or service pointer
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void* m; // message pointer
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};
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/*
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* SERVICE
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*
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**/
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// srv->version and srv->index must be already set
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// init unix socket + fill srv->spath
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int32_t ipc_server_init (char **env , struct ipc_service *srv, const char *sname);
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int32_t ipc_server_close (struct ipc_service *srv);
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int32_t ipc_server_close_client (struct ipc_client *p);
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int32_t ipc_server_accept (struct ipc_service *srv, struct ipc_client *p);
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// 1 on a recipient socket close
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int32_t ipc_server_read (const struct ipc_client *, struct ipc_message *m);
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int32_t ipc_server_write (const struct ipc_client *, const struct ipc_message *m);
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int32_t ipc_server_select (struct ipc_clients * clients, struct ipc_service *srv
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, struct ipc_clients *active_clients, int32_t *new_connection);
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int32_t ipc_service_poll_event (struct ipc_clients *clients, struct ipc_service *srv
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, struct ipc_event *event);
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/**
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* SERVICES
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*/
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// store and remove only pointers on allocated structures
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int32_t ipc_services_add (struct ipc_services *, struct ipc_service *);
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int32_t ipc_services_del (struct ipc_services *, struct ipc_service *);
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void ipc_services_free (struct ipc_services *);
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struct ipc_service * ipc_client_server_copy (const struct ipc_service *p);
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int32_t ipc_service_eq (const struct ipc_service *p1, const struct ipc_service *p2);
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// create the client service structure
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void ipc_client_server_gen (struct ipc_service *p, uint32_t index, uint32_t version);
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static inline int32_t ipc_service_empty (struct ipc_service *srv) { srv = srv; return 0 ;};
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/*
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* APPLICATION
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*
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**/
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// Initialize connection with unix socket
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// send the connection string to $TMP/<service>
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// fill srv->spath && srv->service_fd
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int32_t ipc_application_connection (char **env, struct ipc_service *, const char *);
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int32_t ipc_application_close (struct ipc_service *);
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// 1 on a recipient socket close
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int32_t ipc_application_read (struct ipc_service *srv, struct ipc_message *m);
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int32_t ipc_application_write (struct ipc_service *, const struct ipc_message *m);
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int32_t ipc_application_select (struct ipc_services *services, struct ipc_services *active_services);
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int32_t ipc_application_poll_event (struct ipc_services *services, struct ipc_event *event);
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int32_t ipc_application_peek_event (struct ipc_services *services, struct ipc_event *event);
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/*
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* MESSAGE
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*
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**/
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// used to create msg structure from buffer
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int32_t ipc_message_format_read (struct ipc_message *m, const char *buf, ssize_t msize);
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// used to create buffer from msg structure
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int32_t ipc_message_format_write (const struct ipc_message *m, char **buf, ssize_t *msize);
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// read a structure msg from fd
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int32_t ipc_message_read (int32_t fd, struct ipc_message *m);
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// write a structure msg to fd
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int32_t ipc_message_write (int32_t fd, const struct ipc_message *m);
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int32_t ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length);
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int32_t ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length);
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int32_t ipc_message_format_server_close (struct ipc_message *m);
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int32_t ipc_message_empty (struct ipc_message *m);
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/*
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* CLIENT
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*
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**/
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// store and remove only pointers on allocated structures
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int32_t ipc_clients_add (struct ipc_clients *, struct ipc_client *);
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int32_t ipc_clients_del (struct ipc_clients *, struct ipc_client *);
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void ipc_clients_free (struct ipc_clients *);
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struct ipc_client * ipc_server_client_copy (const struct ipc_client *p);
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int32_t ipc_server_client_eq (const struct ipc_client *p1, const struct ipc_client *p2);
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// create the service client structure
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void ipc_server_client_gen (struct ipc_client *p, uint32_t index, uint32_t version);
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#endif
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