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/* SPDX-FileCopyrightText: 2023 Greenbone AG
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef MISC_IPC_H
#define MISC_IPC_H
#include <sys/types.h>
enum ipc_protocol
{
IPC_PIPE
};
enum ipc_relation
{
IPC_MAIN,
IPC_CHILD
};
/**
* ipc_context contains information about an inter process communication
* process.
*
* @param type indicates what type of ipc it represents
* @param pid is set on ipc_exec_as_process and contains the pid of the child
* process.
* @param context contextual data for ipc. Is only used internally.
*/
struct ipc_context
{
enum ipc_protocol type;
enum ipc_relation relation;
unsigned int closed;
pid_t pid;
void *context;
};
struct ipc_contexts
{
int len;
int cap;
struct ipc_context *ctxs;
};
typedef void (*ipc_process_func) (struct ipc_context *, void *);
struct ipc_exec_context
{
// function to be executed before func is executed
ipc_process_func pre_func;
// function to be executed
ipc_process_func func;
// function to be executed after func is executed
ipc_process_func post_func;
void *pre_arg; // argument for pre_func
void *func_arg; // argument for func
void *post_arg; // argument for post_func
void *shared_context; // context to be included in ipc_context
};
// ipc_process_func is a type for the function to be executed.
int
ipc_send (struct ipc_context *context, enum ipc_relation to, const char *msg,
size_t len);
char *
ipc_retrieve (struct ipc_context *context, enum ipc_relation from);
int
ipc_destroy (struct ipc_context *context);
int
ipc_close (struct ipc_context *context);
struct ipc_context *
ipc_exec_as_process (enum ipc_protocol type,
struct ipc_exec_context exec_context);
struct ipc_context *
ipc_init (enum ipc_protocol protocol, enum ipc_relation relation);
struct ipc_contexts *
ipc_contexts_init (int len);
struct ipc_contexts *
ipc_add_context (struct ipc_contexts *ctxs, struct ipc_context *ctx);
int
ipc_destroy_contexts (struct ipc_contexts *ctxs);
#endif
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