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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 face.c
* \brief Implementation of face abstraction
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "face.h"
#include "util/hash.h"
#include "util/token.h"
#define member_size(type, member) sizeof(((type *)0)->member)
/* Netdevice */
const char * netdevice_type_str[] = {
#define _(x) [NETDEVICE_TYPE_ ## x] = STRINGIZE(x),
foreach_netdevice_type
#undef _
};
/* Face state */
const char * face_state_str[] = {
#define _(x) [FACE_STATE_ ## x] = STRINGIZE(x),
foreach_face_state
#undef _
};
/* Face type */
const char * face_type_str[] = {
#define _(x) [FACE_TYPE_ ## x] = STRINGIZE(x),
foreach_face_type
#undef _
};
/* Face */
int
face_initialize(face_t * face)
{
bzero(face, sizeof(face_t)); /* 0'ed for hash */
return 1;
}
int
face_initialize_udp(face_t * face, const ip_address_t * local_addr,
u16 local_port, const ip_address_t * remote_addr, u16 remote_port,
int family)
{
*face = (face_t) {
.type = FACE_TYPE_UDP,
.params.tunnel = {
.family = family,
.local_addr = *local_addr,
.local_port = local_port,
.remote_addr = *remote_addr,
.remote_port = remote_port,
},
};
return 1;
}
int
face_initialize_udp_sa(face_t * face, const struct sockaddr * local_addr,
const struct sockaddr * remote_addr)
{
if (local_addr->sa_family != remote_addr->sa_family)
return -1;
switch (local_addr->sa_family) {
case AF_INET:
{
struct sockaddr_in *lsai = (struct sockaddr_in *)local_addr;
struct sockaddr_in *rsai = (struct sockaddr_in *)remote_addr;
*face = (face_t) {
.type = FACE_TYPE_UDP,
.params.tunnel = {
.family = AF_INET,
.local_addr.v4.as_inaddr = lsai->sin_addr,
.local_port = ntohs(lsai->sin_port),
.remote_addr.v4.as_inaddr = rsai->sin_addr,
.remote_port = ntohs(rsai->sin_port),
},
};
}
break;
case AF_INET6:
{
struct sockaddr_in6 *lsai = (struct sockaddr_in6 *)local_addr;
struct sockaddr_in6 *rsai = (struct sockaddr_in6 *)remote_addr;
*face = (face_t) {
.type = FACE_TYPE_UDP,
.params.tunnel = {
.family = AF_INET6,
.local_addr.v6.as_in6addr = lsai->sin6_addr,
.local_port = ntohs(lsai->sin6_port),
.remote_addr.v6.as_in6addr = rsai->sin6_addr,
.remote_port = ntohs(rsai->sin6_port),
},
};
}
break;
default:
return -1;
}
return 1;
}
face_t * face_create()
{
face_t * face = calloc(1, sizeof(face_t)); /* 0'ed for hash */
return face;
}
face_t * face_create_udp(const ip_address_t * local_addr, u16 local_port,
const ip_address_t * remote_addr, u16 remote_port, int family)
{
face_t * face = face_create();
if (face_initialize_udp(face, local_addr, local_port, remote_addr, remote_port, family) < 0)
goto ERR_INIT;
return face;
ERR_INIT:
free(face);
return NULL;
}
face_t * face_create_udp_sa(const struct sockaddr * local_addr,
const struct sockaddr * remote_addr)
{
face_t * face = face_create();
if (face_initialize_udp_sa(face, local_addr, remote_addr) < 0)
goto ERR_INIT;
return face;
ERR_INIT:
free(face);
return NULL;
}
void face_free(face_t * face)
{
free(face);
}
#define face_param_cmp(f1, f2, face_param_type) \
memcmp(&f1->type, &f2->type, \
member_size(face_params_t, face_param_type));
/**
* \brief Compare two faces
* \param [in] f1 - First face
* \param [in] f2 - Second face
* \return whether faces are equal, ie both their types are parameters are
* equal.
*
* NOTE: this function implements a partial order.
*/
int
face_cmp(const face_t * f1, const face_t * f2)
{
if (f1->type != f2->type)
return false;
switch(f1->type) {
case FACE_TYPE_HICN:
return face_param_cmp(f1, f2, hicn);
case FACE_TYPE_TCP:
case FACE_TYPE_UDP:
return face_param_cmp(f1, f2, tunnel);
default:
return false;
}
}
hash_t
face_hash(const face_t * face)
{
/* Assuming the unused part of the struct is set to zero */
return hash_struct(face);
}
/* /!\ Please update constants in header file upon changes */
size_t
face_snprintf(char * s, size_t size, const face_t * face)
{
switch(face->type) {
case FACE_TYPE_HICN:
return 0; // XXX Not implemented
case FACE_TYPE_TCP:
case FACE_TYPE_UDP:
{
char local[MAXSZ_IP_ADDRESS];
char remote[MAXSZ_IP_ADDRESS];
ip_address_snprintf(local, MAXSZ_IP_ADDRESS,
&face->params.tunnel.local_addr,
face->params.tunnel.family);
ip_address_snprintf(remote, MAXSZ_IP_ADDRESS,
&face->params.tunnel.remote_addr,
face->params.tunnel.family);
return snprintf(s, size, "%s [%s:%d -> %s:%d]",
face_type_str[face->type],
local,
face->params.tunnel.local_port,
remote,
face->params.tunnel.remote_port);
}
break;
default:
return 0;
}
}
int
face_set_tags(face_t * face, policy_tags_t tags)
{
face->tags = tags;
return 1;
}
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