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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "netifd.h"
#include "interface.h"
#include "proto.h"
static struct avl_tree handlers;
void add_proto_handler(struct proto_handler *p)
{
if (!handlers.comp)
avl_init(&handlers, avl_strcmp, false, NULL);
if (p->avl.key)
return;
p->avl.key = p->name;
avl_insert(&handlers, &p->avl);
}
static void
default_proto_free(struct interface_proto_state *proto)
{
free(proto);
}
static int
invalid_proto_handler(struct interface_proto_state *proto,
enum interface_proto_cmd cmd, bool force)
{
return -1;
}
static int
no_proto_handler(struct interface_proto_state *proto,
enum interface_proto_cmd cmd, bool force)
{
return 0;
}
static struct interface_proto_state *
get_default_proto(void)
{
struct interface_proto_state *proto;
proto = calloc(1, sizeof(*proto));
proto->free = default_proto_free;
proto->flags = PROTO_FLAG_IMMEDIATE;
return proto;
}
struct proto_handler *
get_proto_handler(const char *name)
{
struct proto_handler *proto;
if (!handlers.comp)
return NULL;
return avl_find_element(&handlers, name, proto, avl);
}
void
proto_attach_interface(struct interface *iface, struct uci_section *s)
{
struct interface_proto_state *state = NULL;
struct proto_handler *proto = NULL;
const char *proto_name;
const char *error = NULL;
proto_name = uci_lookup_option_string(uci_ctx, s, "proto");
if (!proto_name) {
error = "NO_PROTO";
goto error;
}
if (!strcmp(proto_name, "none")) {
state = get_default_proto();
state->handler = no_proto_handler;
goto out;
}
proto = get_proto_handler(proto_name);
if (!proto) {
error = "INVALID_PROTO";
goto error;
}
state = proto->attach(proto, iface, s);
error:
if (error) {
interface_add_error(iface, "proto", error, NULL, 0);
state = get_default_proto();
state->handler = invalid_proto_handler;
}
out:
interface_set_proto_state(iface, state);
}
int
interface_proto_event(struct interface_proto_state *proto,
enum interface_proto_cmd cmd, bool force)
{
enum interface_event ev;
int ret;
ret = proto->handler(proto, cmd, force);
if (ret || !(proto->flags & PROTO_FLAG_IMMEDIATE))
goto out;
switch(cmd) {
case PROTO_CMD_SETUP:
ev = IFEV_UP;
break;
case PROTO_CMD_TEARDOWN:
ev = IFEV_DOWN;
break;
default:
return -EINVAL;
}
proto->proto_event(proto, ev);
out:
return ret;
}
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