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/*
* Copyright (c) 2017 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.
*/
#include <config.h>
#include <stdbool.h>
#include <stdint.h>
#include <strings.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <LongBow/runtime.h>
#include <parc/algol/parc_Memory.h>
#include <ccnx/api/control/cpi_NameRouteProtocolType.h>
#include <ccnx/api/control/cpi_RouteEntry.h>
#include <ccnx/api/control/cpi_Forwarding.h>
#include <ccnx/forwarder/metis/config/metisControl_AddRoute.h>
static MetisCommandReturn _metisControlAddRoute_Execute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args);
static MetisCommandReturn _metisControlAddRoute_HelpExecute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args);
static const char *_commandAddRoute = "add route";
static const char *_commandAddRouteHelp = "help add route";
MetisCommandOps *
metisControlAddRoute_Create(MetisControlState *state)
{
return metisCommandOps_Create(state, _commandAddRoute, NULL, _metisControlAddRoute_Execute, metisCommandOps_Destroy);
}
MetisCommandOps *
metisControlAddRoute_HelpCreate(MetisControlState *state)
{
return metisCommandOps_Create(state, _commandAddRouteHelp, NULL, _metisControlAddRoute_HelpExecute, metisCommandOps_Destroy);
}
/**
* Return true if string is purely an integer
*/
static bool
_isNumber(const char *string)
{
size_t len = strlen(string);
for (size_t i = 0; i < len; i++) {
if (!isdigit(string[i])) {
return false;
}
}
return true;
}
/**
* A symbolic name must be at least 1 character and must begin with an alpha.
* The remainder must be an alphanum.
*/
static bool
_validateSymbolicName(const char *symbolic)
{
bool success = false;
size_t len = strlen(symbolic);
if (len > 0) {
if (isalpha(symbolic[0])) {
success = true;
for (size_t i = 1; i < len; i++) {
if (!isalnum(symbolic[i])) {
success = false;
break;
}
}
}
}
return success;
}
// ====================================================
static MetisCommandReturn
_metisControlAddRoute_HelpExecute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args)
{
printf("commands:\n");
printf(" add route <symbolic | connid> <prefix> <cost>\n");
printf("\n");
printf(" symbolic: The symbolic name for an exgress\n");
printf(" connid: The egress connection id (see 'help list connections')\n");
printf(" prefix: The CCNx name as a URI (e.g. lci:/foo/bar)\n");
printf(" cost: positive integer representing cost\n");
printf(" nexthop: Optional network endpoint on the connection\n");
printf(" seconds: Create a route that will expire if not refresed within the lifetime\n");
printf("\n");
printf("Examples:\n");
printf(" add route 7 lci:/foo/bar 1\n");
printf(" adds route to prefix '/foo/bar' on egress connection 7 with cost 1\n");
printf(" add route tun3 lci:/foo/bar 1\n");
printf(" adds route to prefix '/foo/bar' on egress connection 'tun3' with cost 1\n");
printf("\n");
return MetisCommandReturn_Success;
}
static MetisCommandReturn
_metisControlAddRoute_Execute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args)
{
MetisControlState *state = ops->closure;
if (parcList_Size(args) != 5) {
_metisControlAddRoute_HelpExecute(parser, ops, args);
return MetisCommandReturn_Failure;
}
const char *symbolicOrConnid = parcList_GetAtIndex(args, 2);
if (_validateSymbolicName(symbolicOrConnid) || _isNumber(symbolicOrConnid)) {
const char *prefixString = parcList_GetAtIndex(args, 3);
unsigned cost = atoi(parcList_GetAtIndex(args, 4));
if (cost == 0) {
printf("ERROR: cost must be positive integer, got %u from '%s'\n", cost, (char *) parcList_GetAtIndex(args, 4));
return MetisCommandReturn_Failure;
}
CCNxName *prefix = ccnxName_CreateFromCString(prefixString);
if (prefix == NULL) {
printf("ERROR: could not parse prefix '%s'\n", prefixString);
return MetisCommandReturn_Failure;
}
char *protocolTypeAsString = "static";
CPINameRouteProtocolType protocolType = cpiNameRouteProtocolType_FromString(protocolTypeAsString);
CPINameRouteType routeType = cpiNameRouteType_LONGEST_MATCH;
CPIAddress *nexthop = NULL;
struct timeval *lifetime = NULL;
CPIRouteEntry *route = NULL;
if (_isNumber(symbolicOrConnid)) {
unsigned connid = (unsigned) strtold(symbolicOrConnid, NULL);
route = cpiRouteEntry_Create(prefix, connid, nexthop, protocolType, routeType, lifetime, cost);
} else {
route = cpiRouteEntry_CreateSymbolic(prefix, symbolicOrConnid, protocolType, routeType, lifetime, cost);
}
CCNxControl *addRouteRequest = ccnxControl_CreateAddRouteRequest(route);
cpiRouteEntry_Destroy(&route);
if (metisControlState_GetDebug(state)) {
char *str = parcJSON_ToString(ccnxControl_GetJson(addRouteRequest));
printf("request: %s\n", str);
parcMemory_Deallocate((void **) &str);
}
CCNxMetaMessage *message = ccnxMetaMessage_CreateFromControl(addRouteRequest);
CCNxMetaMessage *rawResponse = metisControlState_WriteRead(state, message);
ccnxMetaMessage_Release(&message);
ccnxControl_Release(&addRouteRequest);
CCNxControl *response = ccnxMetaMessage_GetControl(rawResponse);
if (metisControlState_GetDebug(state)) {
char *str = parcJSON_ToString(ccnxControl_GetJson(response));
printf("response: %s\n", str);
parcMemory_Deallocate((void **) &str);
}
ccnxMetaMessage_Release(&rawResponse);
return MetisCommandReturn_Success;
} else {
printf("ERROR: Invalid symbolic or connid. Symbolic name must begin with an alpha followed by alphanum. connid must be an integer\n");
return MetisCommandReturn_Failure;
}
}
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