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libifupdown: add initial interface management code

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Ariadne Conill 2020-07-18 04:24:53 -06:00
parent 3f618d2a3b
commit 84a01ffdc4
3 changed files with 285 additions and 1 deletions
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libifupdown/interface.h Normal file
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/*
* libifupdown/interface.h
* Purpose: interface management
*
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#ifndef LIBIFUPDOWN_INTERFACE_H__GUARD
#define LIBIFUPDOWN_INTERFACE_H__GUARD
#include <arpa/inet.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>
#include "libifupdown/dict.h"
/*
* Addresses are stored in a buffer with netmask and type.
*/
struct lif_address {
unsigned char addr_buf[sizeof(struct in6_addr)];
size_t netmask;
int domain;
};
extern bool lif_address_parse(struct lif_address *address, const char *presentation);
extern bool lif_address_unparse(const struct lif_address *address, char *buf, size_t buflen, bool with_netmask);
/*
* Interfaces are contained in a dictionary, with the interfaces mapped by
* interface name to their `struct lif_interface`.
*
* Interfaces are simply upserted as needed. This allows for `auto eth0`
* to create a placeholder `struct lif_interface` with auto set to true.
*
* Configuration variables are simply stored in a `struct lif_dict`, which
* can act as a multidict.
*/
struct lif_interface {
char *ifname;
bool is_dhcp;
bool is_loopback;
bool is_auto;
struct lif_dict vars;
};
#define LIF_INTERFACE_COLLECTION_FOREACH(iter, collection) \
LIF_DICT_FOREACH((iter), (collection))
#define LIF_INTERFACE_COLLECTION_FOREACH_SAFE(iter, iter_next, collection) \
LIF_DICT_FOREACH_SAFE((iter), (iter_next), (collection))
extern void lif_interface_init(struct lif_interface *interface, const char *ifname);
extern bool lif_interface_address_add(struct lif_interface *interface, const char *address);
extern void lif_interface_address_delete(struct lif_interface *interface, const char *address);
extern void lif_interface_fini(struct lif_interface *interface);
extern void lif_interface_collection_init(struct lif_dict *collection);
extern void lif_interface_collection_fini(struct lif_dict *collection);
extern struct lif_interface *lif_interface_collection_find(struct lif_dict *collection, const char *ifname);
extern struct lif_interface *lif_interface_collection_upsert(struct lif_dict *collection, struct lif_interface *interface);
extern void lif_interface_collection_delete(struct lif_dict *collection, struct lif_interface *interface);
#endif