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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* \file facemgr.c
* \brief Implementation of Face manager library interface
*/
#include <stdio.h>
#include "common.h"
#include "event.h"
#include "facemgr.h"
#include "interface.h"
#include "util/log.h"
#ifdef __APPLE__
extern interface_ops_t network_framework_ops;
#endif
#ifdef __linux__
extern interface_ops_t netlink_ops;
#endif
#if 0
extern interface_ops_t dummy_ops;
#endif
extern interface_ops_t hicn_light_ops;
int
facemgr_initialize(facemgr_t * facemgr)
{
int rc;
rc = interface_map_initialize(&facemgr->interface_map);
if (FACEMGR_IS_ERROR(rc))
goto ERR_INTERFACE_MAP;
rc = face_cache_initialize(&facemgr->face_cache);
if (FACEMGR_IS_ERROR(rc))
goto ERR_FACE_SET;
rc = face_rules_initialize(&facemgr->rules);
if (FACEMGR_IS_ERROR(rc))
goto ERR_FACE_SET;
return FACEMGR_SUCCESS;
ERR_FACE_SET:
interface_map_finalize(&facemgr->interface_map);
ERR_INTERFACE_MAP:
return FACEMGR_FAILURE;
}
int
facemgr_finalize(facemgr_t * facemgr)
{
int rc;
/* XXX Free all interfaces: pass free to map */
rc = interface_map_finalize(&facemgr->interface_map);
if (FACEMGR_IS_ERROR(rc))
goto ERR;
rc = face_cache_finalize(&facemgr->face_cache);
if (FACEMGR_IS_ERROR(rc))
goto ERR;
rc = face_rules_finalize(&facemgr->rules);
if (FACEMGR_IS_ERROR(rc))
goto ERR;
return FACEMGR_SUCCESS;
ERR:
return FACEMGR_FAILURE;
}
AUTOGENERATE_CREATE_FREE(facemgr);
int
facemgr_on_event(facemgr_t * facemgr, event_t * event)
{
int rc;
char face_s[MAXSZ_FACE];
face_t * cached_face;
if (!event->face) {
printf("Event with empty face\n");
return -1;
}
face_t face = *event->face;
/* Complement unbound UDP faces */
switch(face.type) {
case FACE_TYPE_TCP:
case FACE_TYPE_UDP:
switch (face.params.tunnel.family) {
case AF_INET:
if ((ip_address_empty(&face.params.tunnel.remote_addr)) &&
(!ip_address_empty(&facemgr->overlay_v4_remote_addr)))
face.params.tunnel.remote_addr = facemgr->overlay_v4_remote_addr;
if ((face.params.tunnel.local_port == 0) && (facemgr->overlay_v4_local_port != 0))
face.params.tunnel.local_port = facemgr->overlay_v4_local_port;
if ((face.params.tunnel.remote_port == 0) && (facemgr->overlay_v4_remote_port != 0))
face.params.tunnel.remote_port = facemgr->overlay_v4_remote_port;
break;
case AF_INET6:
if ((ip_address_empty(&face.params.tunnel.remote_addr)) &&
(!ip_address_empty(&facemgr->overlay_v6_remote_addr)))
face.params.tunnel.remote_addr = facemgr->overlay_v6_remote_addr;
if ((face.params.tunnel.local_port == 0) && (facemgr->overlay_v6_local_port != 0))
face.params.tunnel.local_port = facemgr->overlay_v6_local_port;
if ((face.params.tunnel.remote_port == 0) && (facemgr->overlay_v6_remote_port != 0))
face.params.tunnel.remote_port = facemgr->overlay_v6_remote_port;
default:
break;
}
break;
default:
break;
}
face_snprintf(face_s, MAXSZ_FACE, &face);
/* TODO Here, we need to filter events based on our cache, and update the cache
* based on our actions if they are successful */
switch(event->type) {
case EVENT_TYPE_CREATE:
rc = face_cache_get(&facemgr->face_cache, &face, &cached_face);
if (!FACEMGR_IS_ERROR(rc)) {
DEBUG("Face found in cache");
goto IGNORE_EVENT;
}
rc = face_cache_add(&facemgr->face_cache, &face);
if (FACEMGR_IS_ERROR(rc))
WARN("Failed to add face to cache");
break;
case EVENT_TYPE_DELETE:
rc = face_cache_remove(&facemgr->face_cache, &face, &cached_face);
if (FACEMGR_IS_ERROR(rc))
WARN("Face not found in cache");
break;
case EVENT_TYPE_SET_UP:
case EVENT_TYPE_SET_DOWN:
/* TODO We need a return code to update the cache */
break;
default:
printf("Not implemented!\n");
break;
}
/* Process event */
printf("[ FACE %s ] %s\n", event_type_str[event->type], face_s);
/* Hardcoded hicn-light */
rc = interface_on_event(facemgr->hl, event);
if (FACEMGR_IS_ERROR(rc))
goto ERR;
IGNORE_EVENT:
return FACEMGR_SUCCESS;
ERR:
return FACEMGR_FAILURE;
}
#ifdef __linux__
void interface_callback(evutil_socket_t fd, short what, void * arg) {
interface_t * interface = (interface_t *)arg;
interface->ops->callback(interface);
}
#endif /* __linux__ */
int
facemgr_create_interface(facemgr_t * facemgr, const char * name, const char * type, interface_t ** interface)
{
int fd, rc;
INFO("Creating interface %s [%s]...\n", name, type);
*interface = interface_create(name, type);
if (!*interface) {
ERROR("Error creating interface %s [%s]\n", name, type);
return -1;
}
interface_set_callback(*interface, facemgr_on_event, facemgr);
fd = interface_initialize(*interface, &facemgr->rules);
if (fd < 0)
return -2;
if (fd != 0) {
#ifdef __linux__
evutil_make_socket_nonblocking(fd);
struct event * event = event_new(facemgr->loop, fd, EV_READ | EV_PERSIST, interface_callback, *interface);
if (!event) {
return -3;
}
if (event_add(event, NULL) < 0) {
return -4;
}
#else
ERROR("Not implemented\n");
return FACEMGR_FAILURE;
#endif /* __linux__ */
}
rc = interface_map_add(&facemgr->interface_map, (*interface)->name, *interface);
if (FACEMGR_IS_ERROR(rc))
return -5;
DEBUG("Interface created successfully.\n");
return FACEMGR_SUCCESS;
}
int
facemgr_bootstrap(facemgr_t * facemgr)
{
int rc;
DEBUG("Registering interfaces...");
rc = interface_register(&hicn_light_ops);
if (FACEMGR_IS_ERROR(rc)) {
ERROR("Could not register interfaces");
goto ERR_REGISTER;
}
#ifdef __APPLE__
rc = interface_register(&network_framework_ops);
if (FACEMGR_IS_ERROR(rc))
goto ERR_REGISTER;
#endif /* __APPLE__ */
#ifdef __linux__
rc = interface_register(&netlink_ops);
if (FACEMGR_IS_ERROR(rc))
goto ERR_REGISTER;
#endif /* __linux__ */
#if 0
rc = interface_register(&dummy_ops);
if (FACEMGR_IS_ERROR(rc))
goto ERR_REGISTER;
#endif
rc = facemgr_create_interface(facemgr, "hl", "hicn_light", &facemgr->hl);
if (rc < 0) {
ERROR("Error creating 'hICN forwarder (hicn-light)' interface\n");
goto ERR_HL_CREATE;
}
#ifdef __APPLE__
rc = facemgr_create_interface(facemgr, "nf", "network_framework", &facemgr->nf);
if (rc < 0) {
ERROR("Error creating 'Apple Network Framework' interface\n");
goto ERR_NF_CREATE;
}
#endif /* __APPLE__ */
#ifdef __linux__
rc = facemgr_create_interface(facemgr, "nl", "netlink", &facemgr->nl);
if (rc < 0) {
ERROR("Error creating 'Netlink' interface\n");
goto ERR_NF_CREATE;
}
#endif /* __linux__ */
#if 0
rc = facemgr_create_interface(facemgr, "dummy", "dummy", &facemgr->dummy);
if (rc < 0) {
ERROR("Error creating 'Dummy' interface\n");
goto ERR_NF_CREATE;
}
#endif
DEBUG("Facemgr successfully initialized...");
return FACEMGR_SUCCESS;
ERR_NF_CREATE:
interface_free(facemgr->hl);
ERR_HL_CREATE:
//interface_map_remove(&facemgr->interface_map, data->nf->name);
ERR_REGISTER:
return FACEMGR_FAILURE;
}
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