diff options
Diffstat (limited to 'metis/ccnx/forwarder/metis/config/metisControl_AddListener.c')
| -rw-r--r-- | metis/ccnx/forwarder/metis/config/metisControl_AddListener.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/metis/ccnx/forwarder/metis/config/metisControl_AddListener.c b/metis/ccnx/forwarder/metis/config/metisControl_AddListener.c new file mode 100644 index 00000000..9268c76f --- /dev/null +++ b/metis/ccnx/forwarder/metis/config/metisControl_AddListener.c @@ -0,0 +1,280 @@ +/* + * 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 <inttypes.h> +#include <ctype.h> + +#include <LongBow/runtime.h> + +#include <parc/algol/parc_Network.h> +#include <parc/algol/parc_Memory.h> +#include <ccnx/api/control/cpi_Listener.h> + +#include <ccnx/forwarder/metis/config/metisControl_AddListener.h> +#include <ccnx/api/control/controlPlaneInterface.h> +#include <ccnx/api/control/cpi_Acks.h> + +static MetisCommandReturn _metisControlAddListener_Execute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args); +static MetisCommandReturn _metisControlAddListener_HelpExecute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args); + +static const char *command_add_listener = "add listener"; +static const char *command_help_add_listener = "help add listener"; + +MetisCommandOps * +metisControlAddListener_Create(MetisControlState *state) +{ + return metisCommandOps_Create(state, command_add_listener, NULL, _metisControlAddListener_Execute, metisCommandOps_Destroy); +} + +MetisCommandOps * +metisControlAddListener_HelpCreate(MetisControlState *state) +{ + return metisCommandOps_Create(state, command_help_add_listener, NULL, _metisControlAddListener_HelpExecute, metisCommandOps_Destroy); +} + +/** + * 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 const int _indexProtocol = 2; +static const int _indexSymbolic = 3; +static const int _indexAddress = 4; +static const int _indexPort = 5; + +static MetisCommandReturn +_metisControlAddListener_HelpExecute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args) +{ + printf("commands:\n"); + printf(" add listener <protocol> <symbolic> <localAddress> <PortOrEtherType>\n"); + printf("\n"); + printf(" symbolic: User defined name for listener, must start with alpha and be alphanum\n"); + printf(" protocol: tcp | udp | ether\n"); + printf(" localAddress: IPv4 or IPv6 or hostname or interface name (see examples)\n"); + printf(" PortOrEtherType: TCP/UDP port or EtherType (base 10 or use 0x for base 16)\n"); + printf("\n"); + printf("Notes:\n"); + printf(" The local address must be on the system (see 'help list interfaces' command).\n"); + printf(" For Ethernet, the broadcast and CCNx group address will also be added.\n"); + printf(" The symblic name must be unique or the forwarder will reject it.\n"); + printf("\n"); + printf("Examples:\n"); + printf(" Listens to 192.168.1.7 on tcp port 9695\n"); + printf(" add listener tcp homenet 192.168.1.7 9695\n"); + printf("\n"); + printf(" Listens to IPv6 localhost on udp port 9695\n"); + printf(" add listener udp localhost6 ::1 9695\n"); + printf("\n"); + printf(" Listens to interface 'en0' on ethertype 0x0801\n"); + printf(" add listener ether nic0 en0 0x0801\n"); + printf("\n"); + return MetisCommandReturn_Success; +} + +static CPIAddress * +_convertStringsToCpiAddress(const char *ip_string, const char *port_string) +{ + int port = atoi(port_string); + struct sockaddr *addr = parcNetwork_SockAddress(ip_string, port); + + if (addr == NULL) { + printf("Error converting address '%s' port '%s' to socket address\n", ip_string, port_string); + return NULL; + } + + CPIAddress *remote_cpi_address = NULL; + switch (addr->sa_family) { + case PF_INET: { + remote_cpi_address = cpiAddress_CreateFromInet((struct sockaddr_in *) addr); + break; + } + + case PF_INET6: { + remote_cpi_address = cpiAddress_CreateFromInet6((struct sockaddr_in6 *) addr); + break; + } + + default: { + printf("Error converting address '%s' port '%s' to socket address, unsupported address family %d\n", + ip_string, port_string, addr->sa_family); + break; + } + } + parcMemory_Deallocate((void **) &addr); + return remote_cpi_address; +} + +static MetisCommandReturn +_sendAndVerify(MetisControlState *metis_State, CCNxControl *control) +{ + MetisCommandReturn result = MetisCommandReturn_Failure; + uint64_t seqnum = cpi_GetSequenceNumber(control); + + CCNxMetaMessage *requestMessage = ccnxMetaMessage_CreateFromControl(control); + CCNxMetaMessage *responseMessage = metisControlState_WriteRead(metis_State, requestMessage); + ccnxMetaMessage_Release(&requestMessage); + + if (metisControlState_GetDebug(metis_State)) { + char *str = parcJSON_ToString(ccnxControl_GetJson(responseMessage)); + printf("reponse:\n%s\n", str); + parcMemory_Deallocate((void **) &str); + } + + if (ccnxMetaMessage_IsControl(responseMessage)) { + CCNxControl *responseControl = ccnxMetaMessage_GetControl(responseMessage); + if (ccnxControl_IsACK(responseControl)) { + uint64_t ackedSeqnum = cpiAcks_GetAckOriginalSequenceNumber(ccnxControl_GetJson(responseControl)); + if (ackedSeqnum == seqnum) { + result = MetisCommandReturn_Success; + } else { + printf("Error: received wrong seqnum expected %" PRIu64 " got %" PRIu64 "\n", seqnum, ackedSeqnum); + } + } + } + + ccnxMetaMessage_Release(&responseMessage); + return result; +} + +static MetisCommandReturn +_createTcpListener(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args) +{ + MetisCommandReturn result = MetisCommandReturn_Failure; + + const char *symbolic = parcList_GetAtIndex(args, _indexSymbolic); + const char *host = parcList_GetAtIndex(args, _indexAddress); + const char *port = parcList_GetAtIndex(args, _indexPort); + + CPIAddress *socket = _convertStringsToCpiAddress(host, port); + if (socket) { + CPIListener *listener = cpiListener_CreateIP(IPTUN_TCP, socket, symbolic); + CCNxControl *control = cpiListener_CreateAddMessage(listener); + + MetisControlState *metis_State = ops->closure; + result = _sendAndVerify(metis_State, control); + ccnxControl_Release(&control); + cpiListener_Release(&listener); + cpiAddress_Destroy(&socket); + } + + return result; +} + +static MetisCommandReturn +_createUdpListener(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args) +{ + MetisCommandReturn result = MetisCommandReturn_Failure; + + const char *symbolic = parcList_GetAtIndex(args, _indexSymbolic); + const char *host = parcList_GetAtIndex(args, _indexAddress); + const char *port = parcList_GetAtIndex(args, _indexPort); + + CPIAddress *socket = _convertStringsToCpiAddress(host, port); + if (socket) { + CPIListener *listener = cpiListener_CreateIP(IPTUN_UDP, socket, symbolic); + CCNxControl *control = cpiListener_CreateAddMessage(listener); + + MetisControlState *metis_State = ops->closure; + result = _sendAndVerify(metis_State, control); + ccnxControl_Release(&control); + cpiListener_Release(&listener); + cpiAddress_Destroy(&socket); + } + + return result; +} + +static MetisCommandReturn +_createEtherListener(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args) +{ + MetisCommandReturn result = MetisCommandReturn_Failure; + + const char *symbolic = parcList_GetAtIndex(args, _indexSymbolic); + const char *ifname = parcList_GetAtIndex(args, _indexAddress); + uint16_t ethertype = (uint16_t) strtoul(parcList_GetAtIndex(args, _indexPort), NULL, 0); + + { + CPIListener *listener = cpiListener_CreateEther(ifname, (uint16_t) ethertype, symbolic); + CCNxControl *control = cpiListener_CreateAddMessage(listener); + + MetisControlState *metis_State = ops->closure; + result = _sendAndVerify(metis_State, control); + ccnxControl_Release(&control); + cpiListener_Release(&listener); + } + + return result; +} + + +static MetisCommandReturn +_metisControlAddListener_Execute(MetisCommandParser *parser, MetisCommandOps *ops, PARCList *args) +{ + if (parcList_Size(args) != 6) { + _metisControlAddListener_HelpExecute(parser, ops, args); + return MetisCommandReturn_Failure; + } + + MetisCommandReturn result = MetisCommandReturn_Failure; + + const char *symbolic = parcList_GetAtIndex(args, _indexSymbolic); + if (_validateSymbolicName(symbolic)) { + const char *protocol = parcList_GetAtIndex(args, _indexProtocol); + if (strcasecmp("tcp", protocol) == 0) { + result = _createTcpListener(parser, ops, args); + } else if (strcasecmp("udp", protocol) == 0) { + result = _createUdpListener(parser, ops, args); + } else if (strcasecmp("ether", protocol) == 0) { + result = _createEtherListener(parser, ops, args); + } else { + printf("Error: unrecognized protocol '%s'\n", protocol); + } + } else { + printf("Error: symbolic name must begin with an alpha and be alphanum after\n"); + } + + + return result; +} + + + |