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openairinterface5g/openair2/RRC/NAS/nas_config.c
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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
*
* 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.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file nas_config.c
* \brief Configures the nasmesh interface
* \author Daniel Camara and Navid Nikaein
* \date 2006-2011
* \version 0.1
* \email:navid.nikaein@eurecom.fr
* \company Eurecom
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/route.h>
#include "nas_config.h"
#include "common/utils/LOG/log.h"
#include "executables/lte-softmodem.h"
#include "common/config/config_userapi.h"
#include "pdcp.h"
//default values according to the examples,
char *baseNetAddress ;
char *netMask ;
char *broadcastAddr ;
#define NASHLP_NETPREFIX "<NAS network prefix, two first bytes of network addresses>\n"
#define NASHLP_NETMASK "<NAS network mask>\n"
#define NASHLP_BROADCASTADDR "<NAS network broadcast address>\n"
void nas_getparams(void) {
// this datamodel require this static because we partially keep data like baseNetAddress (malloc on a global)
// but we loose the opther attributes in nasoptions between two calls if is is not static !
// clang-format off
paramdef_t nasoptions[] = {
/*--------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
/* configuration parameters for netlink, includes network parameters when running in noS1 mode */
/* optname helpstr paramflags XXXptr defXXXval type numelt */
/*--------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
{"NetworkPrefix", NASHLP_NETPREFIX, 0, .strptr=&baseNetAddress, .defstrval="10.0", TYPE_STRING, 0 },
{"NetworkMask", NASHLP_NETMASK, 0, .strptr=&netMask, .defstrval="255.255.255.0", TYPE_STRING, 0 },
{"BroadcastAddr", NASHLP_BROADCASTADDR, 0, .strptr=&broadcastAddr, .defstrval="10.0.255.255", TYPE_STRING, 0 },
};
// clang-format on
config_get(config_get_if(), nasoptions, sizeofArray(nasoptions), "nas.noS1");
}
void setBaseNetAddress (char *baseAddr) {
strcpy(baseNetAddress,baseAddr);
}
char *getBaseNetAddress (void) {
return baseNetAddress;
}
void setNetMask (char *baseAddr) {
strcpy(netMask,baseAddr);
}
char *getNetMask (void) {
return netMask;
}
void setBroadcastAddress (char *baseAddr) {
strcpy(broadcastAddr, baseAddr);
}
char *getBroadcastAddress (void) {
return broadcastAddr;
}
//Add Gateway to the interface
int set_gateway(char *interfaceName, char *gateway) {
int sock_fd;
struct rtentry rt;
struct sockaddr_in addr;
if((sock_fd = socket(AF_INET,SOCK_DGRAM,0)) < 0) {
perror("socket failed");
return 1;
}
memset (&rt, 0, sizeof (rt));
addr.sin_family = AF_INET;
/*set Destination addr*/
inet_aton("0.0.0.0",&addr.sin_addr);
memcpy(&rt.rt_dst, &addr, sizeof(struct sockaddr_in));
/*set gateway addr*/
inet_aton(gateway,&addr.sin_addr);
memcpy(&rt.rt_gateway, &addr, sizeof(struct sockaddr_in));
/*set genmask addr*/
inet_aton("0.0.0.0",&addr.sin_addr);
memcpy(&rt.rt_genmask, &addr, sizeof(struct sockaddr_in));
rt.rt_dev = interfaceName;
//rt.rt_flags = RTF_UP|RTF_GATEWAY|RTF_DEFAULT;
/* SR: rt_flags on 16 bits but RTF_DEFAULT = 0x00010000
* therefore doesn't lie in container -> disable it
*/
//rt.rt_flags = RTF_GATEWAY|RTF_DEFAULT;
rt.rt_flags = RTF_GATEWAY;
if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
close(sock_fd);
if(strstr(strerror(errno),"File exists") == NULL) {
LOG_E(OIP,"ioctl SIOCADDRT failed : %s\n",strerror(errno));
return 2;
} else { /*if SIOCADDRT error is route exist, retrun success*/
LOG_I(OIP,"File Exist ...\n");
LOG_I(OIP,"set_gateway OK!\n");
return 0;
}
}
close(sock_fd);
LOG_D(OIP,"Set Gateway OK!\n");
return 0;
}
// sets a genneric interface parameter
// (SIOCSIFADDR, SIOCSIFNETMASK, SIOCSIFBRDADDR, SIOCSIFFLAGS)
int setInterfaceParameter(char *interfaceName, char *settingAddress, int operation) {
int sock_fd;
struct ifreq ifr;
struct sockaddr_in addr;
if((sock_fd = socket(AF_INET,SOCK_DGRAM,0)) < 0) {
LOG_E(OIP,"Setting operation %d, for %s, address, %s : socket failed\n",
operation, interfaceName, settingAddress);
return 1;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, interfaceName, sizeof(ifr.ifr_name)-1);
memset(&addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
inet_aton(settingAddress,&addr.sin_addr);
memcpy(&ifr.ifr_ifru.ifru_addr,&addr,sizeof(struct sockaddr_in));
if(ioctl(sock_fd,operation,&ifr) < 0) {
close(sock_fd);
LOG_E(OIP,"Setting operation %d, for %s, address, %s : ioctl call failed\n",
operation, interfaceName, settingAddress);
return 2;
}
close(sock_fd);
return 0;
}
// sets a genneric interface parameter
// (SIOCSIFADDR, SIOCSIFNETMASK, SIOCSIFBRDADDR, SIOCSIFFLAGS)
int bringInterfaceUp(char *interfaceName, int up) {
int sock_fd;
struct ifreq ifr;
if((sock_fd = socket(AF_INET,SOCK_DGRAM,0)) < 0) {
LOG_E(OIP,"Bringing interface UP, for %s, failed creating socket\n", interfaceName);
return 1;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, interfaceName, sizeof(ifr.ifr_name)-1);
if(up) {
ifr.ifr_flags |= IFF_UP | IFF_NOARP | IFF_MULTICAST;
if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t)&ifr) == -1) {
close(sock_fd);
LOG_E(OIP,"Bringing interface UP, for %s, failed UP ioctl\n", interfaceName);
return 2;
}
} else {
// printf("desactivation de %s\n", interfaceName);
ifr.ifr_flags &= (~IFF_UP);
if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t)&ifr) == -1) {
close(sock_fd);
LOG_E(OIP,"Bringing interface down, for %s, failed UP ioctl\n", interfaceName);
return 2;
}
}
// printf("UP/DOWN OK!\n");
close( sock_fd );
return 0;
}
// non blocking full configuration of the interface (address, net mask, and broadcast mask)
int NAS_config(char *interfaceName, char *ipAddress, char *networkMask, char *broadcastAddress) {
bringInterfaceUp(interfaceName, 0);
// sets the machine address
int returnValue= setInterfaceParameter(interfaceName, ipAddress,SIOCSIFADDR);
// sets the machine network mask
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, networkMask,SIOCSIFNETMASK);
// sets the machine broadcast address
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, broadcastAddress,SIOCSIFBRDADDR);
// if(!returnValue)
// returnValue=set_gateway(interfaceName, broadcastAddress);
if(!returnValue)
returnValue = bringInterfaceUp(interfaceName, 1);
return returnValue;
}
int nas_config_mbms(int interface_id, int thirdOctet, int fourthOctet, char *ifname) {
//char buf[5];
char ipAddress[20];
char broadcastAddress[20];
char interfaceName[20];
int returnValue;
//if(strcmp(ifname,"ue") == 0)
//sprintf(ipAddress, "%s.%d.%d", "20.0",thirdOctet,fourthOctet);
////else
sprintf(ipAddress, "%s.%d.%d",baseNetAddress,thirdOctet,fourthOctet);
sprintf(broadcastAddress, "%s.%d.255",baseNetAddress, thirdOctet);
sprintf(interfaceName, "%s%s%d", (UE_NAS_USE_TUN || ENB_NAS_USE_TUN)?"oaitun_":ifname,
UE_NAS_USE_TUN?ifname/*"ue"*/: (ENB_NAS_USE_TUN?ifname/*"enb"*/:""),interface_id);
bringInterfaceUp(interfaceName, 0);
// sets the machine address
returnValue= setInterfaceParameter(interfaceName, ipAddress,SIOCSIFADDR);
// sets the machine network mask
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, netMask,SIOCSIFNETMASK);
// sets the machine broadcast address
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, broadcastAddress,SIOCSIFBRDADDR);
if(!returnValue)
bringInterfaceUp(interfaceName, 1);
if(!returnValue)
LOG_I(OIP,"Interface %s successfully configured, ip address %s, mask %s broadcast address %s\n",
interfaceName, ipAddress, netMask, broadcastAddress);
else
LOG_E(OIP,"Interface %s couldn't be configured (ip address %s, mask %s broadcast address %s)\n",
interfaceName, ipAddress, netMask, broadcastAddress);
return returnValue;
}
int nas_config_mbms_s1(int interface_id, int thirdOctet, int fourthOctet, char *ifname) {
//char buf[5];
char ipAddress[20];
char broadcastAddress[20];
char interfaceName[20];
int returnValue;
//if(strcmp(ifname,"ue") == 0)
//sprintf(ipAddress, "%s.%d.%d", "20.0",thirdOctet,fourthOctet);
////else
sprintf(ipAddress, "%s.%d.%d","10.0",thirdOctet,fourthOctet);
sprintf(broadcastAddress, "%s.%d.255","10.0", thirdOctet);
sprintf(interfaceName, "%s%s%d", "oaitun_",ifname,interface_id);
bringInterfaceUp(interfaceName, 0);
// sets the machine address
returnValue= setInterfaceParameter(interfaceName, ipAddress,SIOCSIFADDR);
// sets the machine network mask
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, "255.255.255.0",SIOCSIFNETMASK);
printf("returnValue %d\n",returnValue);
// sets the machine broadcast address
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, broadcastAddress,SIOCSIFBRDADDR);
printf("returnValue %d\n",returnValue);
if(!returnValue)
bringInterfaceUp(interfaceName, 1);
printf("returnValue %d\n",returnValue);
if(!returnValue)
LOG_I(OIP,"Interface %s successfully configured, ip address %s, mask %s broadcast address %s\n",
interfaceName, ipAddress, "255.255.255.0", broadcastAddress);
else
LOG_E(OIP,"Interface %s couldn't be configured (ip address %s, mask %s broadcast address %s)\n",
interfaceName, ipAddress, "255.255.255.0", broadcastAddress);
return returnValue;
}
// non blocking full configuration of the interface (address, and the two lest octets of the address)
int nas_config(int interface_id, int thirdOctet, int fourthOctet, char *ifname) {
//char buf[5];
char ipAddress[20];
char broadcastAddress[20];
char interfaceName[20];
int returnValue;
sprintf(ipAddress, "%s.%d.%d", baseNetAddress,thirdOctet,fourthOctet);
sprintf(broadcastAddress, "%s.%d.255",baseNetAddress, thirdOctet);
sprintf(interfaceName, "%s%s%d", (UE_NAS_USE_TUN || ENB_NAS_USE_TUN)?"oaitun_":ifname,
UE_NAS_USE_TUN?"ue": (ENB_NAS_USE_TUN?"enb":""),interface_id);
bringInterfaceUp(interfaceName, 0);
// sets the machine address
returnValue= setInterfaceParameter(interfaceName, ipAddress,SIOCSIFADDR);
// sets the machine network mask
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, netMask,SIOCSIFNETMASK);
// sets the machine broadcast address
if(!returnValue)
returnValue= setInterfaceParameter(interfaceName, broadcastAddress,SIOCSIFBRDADDR);
if(!returnValue)
returnValue=bringInterfaceUp(interfaceName, 1);
if(!returnValue)
LOG_I(OIP,"Interface %s successfully configured, ip address %s, mask %s broadcast address %s\n",
interfaceName, ipAddress, netMask, broadcastAddress);
else
LOG_E(OIP,"Interface %s couldn't be configured (ip address %s, mask %s broadcast address %s)\n",
interfaceName, ipAddress, netMask, broadcastAddress);
int res;
char command_line[500];
res = sprintf(command_line,
"ip rule add from %s/32 table %d && "
"ip rule add to %s/32 table %d && "
"ip route add default dev %s%d table %d",
ipAddress, interface_id - 1 + 10000,
ipAddress, interface_id - 1 + 10000,
UE_NAS_USE_TUN ? "oaitun_ue" : "oip",
interface_id, interface_id - 1 + 10000);
if (res < 0) {
LOG_E(OIP,"Could not create ip rule/route commands string\n");
return res;
}
background_system(command_line);
return returnValue;
}
// Blocking full configuration of the interface (address, net mask, and broadcast mask)
int blocking_NAS_config(char *interfaceName, char *ipAddress, char *networkMask, char *broadcastAddress) {
char command[200];
command[0]='\0';
strcat(command, "ifconfig ");
strncat(command, interfaceName, sizeof(command) - strlen(command) - 1);
strncat(command, " ", sizeof(command) - strlen(command) - 1);
strncat(command, ipAddress, sizeof(command) - strlen(command) - 1);
strncat(command, " networkMask ", sizeof(command) - strlen(command) - 1);
strncat(command, networkMask, sizeof(command) - strlen(command) - 1);
strncat(command, " broadcast ", sizeof(command) - strlen(command) - 1);
strncat(command, broadcastAddress, sizeof(command) - strlen(command) - 1);
// ifconfig nasmesh0 10.0.1.1 networkMask 255.255.255.0 broadcast 10.0.1.255
int i = system (command);
return i;
}
// program help
void helpOptions(char **argv) {
printf("Help for %s\n", argv[0]);
printf(" -i <interfaceName>\n");
printf(" -a <IP address>\n");
printf(" -n <Net mask>\n");
printf(" -b <broadcast address>\n");
printf(" -h Shows this help\n");
printf("If no option is passed as parameter the default values are: \n");
printf(" Interface Name: nasmesh0\n");
printf(" IP Address: 10.0.1.1\n");
printf(" Net mask: 255.255.255.0\n");
printf(" Broadcast address: [Beginning of the IP address].255\n");
exit(1);
}
// creates the broadcast address if it wasn't set before
void createBroadcast(char *broadcastAddress) {
int pos=strlen(broadcastAddress)-1;
while(broadcastAddress[pos]!='.')
pos--;
broadcastAddress[++pos]='2';
broadcastAddress[++pos]='2';
broadcastAddress[++pos]='5';
broadcastAddress[++pos]='\0';
}
#ifdef STANDALONE
// main function
//---------------------------------------------------------------------------
int main(int argc,char **argv)
//---------------------------------------------------------------------------
{
int c;
char interfaceName[100];
char ipAddress[100];
char networkMask[100];
char broadcastAddress[100];
strcpy(interfaceName, "oai0");
strcpy(ipAddress, "10.0.1.1");
strcpy(networkMask, "255.255.255.0");
broadcastAddress[0]='\0';
while ((c = getopt (argc, argv, "i:a:n:b:h")) != -1)
switch (c) {
case 'h':
helpOptions(argv);
break;
case 'i':
strcpy(interfaceName,optarg);
break;
case 'a':
strcpy(ipAddress,optarg);
break;
case 'n':
strcpy(networkMask,optarg);
break;
case 'b':
strcpy(broadcastAddress,optarg);
break;
case '?':
if (isprint (optopt))
fprintf (stderr, "Unknown option `-%c'.\n", optopt);
else
fprintf (stderr,
"Unknown option character `\\x%x'.\n",
optopt);
return 1;
default:
abort ();
}
if(strlen(broadcastAddress)==0) {
strcpy(broadcastAddress,ipAddress);
createBroadcast(broadcastAddress);
}
printf("Command: ifconfig %s %s networkMask %s broadcast %s\n", interfaceName, ipAddress, networkMask, broadcastAddress);
NAS_config(interfaceName, ipAddress, networkMask, broadcastAddress);
//test
// setBaseNetAddress("11.11");
// nas_config(interfaceName, 33, 44);
}
#endif
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