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c67f47ca1b258564ebc9beb8cb24f5433f7383eb
openairinterface5g/openair-cn/SGI/sgi_egress.c
T
Lionel Gauthier 91e6729d46 Licence 
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5169 818b1a75-f10b-46b9-bf7c-635c3b92a50f
2014-03-14 09:49:18 +00:00

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/*******************************************************************************
Eurecom OpenAirInterface core network
Copyright(c) 1999 - 2014 Eurecom
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Contact Information
Openair Admin: openair_admin@eurecom.fr
Openair Tech : openair_tech@eurecom.fr
Forums : http://forums.eurecom.fsr/openairinterface
Address : EURECOM,
Campus SophiaTech,
450 Route des Chappes,
CS 50193
06904 Biot Sophia Antipolis cedex,
FRANCE
*******************************************************************************/
/*! \file sgi_egress.c
* \brief
* \author Lionel Gauthier
* \company Eurecom
* \email: lionel.gauthier@eurecom.fr
*/
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include "sgi.h"
#include "intertask_interface.h"
#include <netinet/ip6.h>
#include <netinet/ip.h>
#include <net/if_arp.h>
struct ipv6hdr {
__u8 priority:4,
version:4;
__u8 flow_lbl[3];
__be16 payload_len;
__u8 nexthdr;
__u8 hop_limit;
struct in6_addr saddr;
struct in6_addr daddr;
};
#ifdef ENABLE_USE_RAW_SOCKET_FOR_SGI
#ifdef SGI_UE_ETHER_TRAFFIC
void sgi_process_raw_packet(sgi_data_t *sgi_data_pP, unsigned char* data_pP, int packet_sizeP)
{
Gtpv1uTunnelDataReq *gtpv1u_tunnel_data_req_p = NULL;
MessageDef *message_p = NULL;
unsigned char *message_payload_p = NULL ;
struct ether_header *eh_p = (struct ether_header *) data_pP;
struct arphdr *arph_p = NULL;
struct iphdr *iph_p = NULL;
struct ipv6hdr *ip6h_p = NULL;
//struct arphdr *rarph = NULL;
//unsigned char *rarp_ptr = NULL;
//unsigned char *sha = NULL; /* Sender hardware address. */
//unsigned char *tha = NULL; /* Target hardware address. */
sgi_addr_mapping_t *addr_mapping_p = NULL;
//__be32 sip, tip; /* Sender, target IP address. */
struct in6_addr dest6_addr;
u_int32_t dest4_addr;
struct in_addr in_dest_addr;
SGI_IF_DEBUG("--------------------------------------------------------------\n%s :\n", __FUNCTION__);
sgi_print_hex_octets(data_pP, packet_sizeP);
switch (htons(eh_p->ether_type)) {
//*******************
case ETHERTYPE_IP:
//*******************
iph_p = (struct iphdr *) (data_pP + sizeof(struct ether_header));
dest4_addr = iph_p->daddr;
if (hashtable_get(sgi_data_pP->addr_v4_mapping, dest4_addr, (void**)&addr_mapping_p) == HASH_TABLE_OK) {
memcpy(eh_p->ether_dhost, addr_mapping_p->ue_mac_addr, ETH_ALEN);
} else {
if (sgi_data_pP->ipv4_addr == dest4_addr) {
SGI_IF_DEBUG("%s Dropping incoming egress IPV4 packet not UE IP flow\n", __FUNCTION__);
return;
} else {
in_dest_addr.s_addr = dest4_addr;
SGI_IF_WARNING("%s Dropping incoming egress IPV4 packet, IPV4 dest %s not found \n", __FUNCTION__, inet_ntoa(in_dest_addr));
return;
}
}
break;
//*******************
case ETHERTYPE_IPV6:
//*******************
ip6h_p = (struct ipv6hdr *) (data_pP + sizeof(struct ether_header));
memcpy(dest6_addr.__in6_u.__u6_addr8, ip6h_p->daddr.__in6_u.__u6_addr8, 16);
if (obj_hashtable_get(sgi_data_pP->addr_v6_mapping, (void*)&dest6_addr, sizeof(struct in6_addr), (void**)&addr_mapping_p) == HASH_TABLE_OK) {
memcpy(eh_p->ether_dhost, addr_mapping_p->ue_mac_addr, ETH_ALEN);
} else {
SGI_IF_WARNING("%s Dropping incoming egress IPV6 packet, IPV6 dest %X:%X:%X:%X:%X:%X:%X:%X not found \n", __FUNCTION__, NIP6ADDR(&dest6_addr));
return;
}
break;
//*******************
case ETHERTYPE_REVARP:
//*******************
SGI_IF_ERROR("%s UNHANDLED ETHERTYPE_REVARP of incoming egress packet\n", __FUNCTION__);
return;
break;
//*******************
case ETHERTYPE_ARP:
//*******************
SGI_IF_DEBUG("%s HANDLED ETHERTYPE_ARP of incoming egress packet\n", __FUNCTION__);
arph_p = (struct arphdr *) (data_pP + sizeof(struct ether_header));
#ifdef SGI_UE_ETHER_TRAFFIC
// The entry should be here but all signalling tied with RRC procedures not finished so
// a data packet can arrive before the MODIFY_BEARER REQUEST
// get " unsigned char __ar_tip[4]; /* Target IP address. */" (from /usr/include/net/if_apr.h line 68)
memcpy(&dest4_addr, &((unsigned char*)(&arph_p[1]))[ETH_ALEN*2+4], 4);
SGI_IF_DEBUG("%s ARP OPCODE %s TARGET IP %d.%d.%d.%d\n", __FUNCTION__, sgi_arpopcode_2_str(ntohl(arph_p->ar_op)), NIPADDR(dest4_addr));
if (hashtable_get(sgi_data_pP->addr_v4_mapping, dest4_addr, (void**)&addr_mapping_p) == HASH_TABLE_OK) {
memcpy(eh_p->ether_dhost, addr_mapping_p->ue_mac_addr, ETH_ALEN);
} else {
if (sgi_data_pP->ipv4_addr == dest4_addr) {
SGI_IF_DEBUG("%s Dropping incoming egress IPV4 packet not UE IP flow\n", __FUNCTION__);
return;
} else {
in_dest_addr.s_addr = dest4_addr;
SGI_IF_WARNING("%s Dropping incoming egress IPV4 packet, IPV4 dest %s not found \n", __FUNCTION__, inet_ntoa(in_dest_addr));
return;
}
}
#else
#endif
break;
// rarph = (struct arphdr *)(data_pP + sizeof(struct ether_header));
//
// // If it's not Ethernet, delete it.
// if (rarph->ar_pro != htons(ETH_P_IP)) {
// SGI_IF_ERROR("%s ARP PACKET PROTOCOL OG INCOMING PACKET IS NOT ETHERNET\n",__FUNCTION__);
// break;
// }
// rarp_ptr = (unsigned char *) (rarph + 1);
// sha = rarp_ptr;
// rarp_ptr += ETH_ALEN;
// memcpy(&sip, rarp_ptr, 4);
// rarp_ptr += 4;
// tha = rarp_ptr;
// rarp_ptr += ETH_ALEN;
// memcpy(&tip, rarp_ptr, 4);
// SGI_IF_DEBUG("%s ARP DEST IP transport IP = %d.%d.%d.%d\n",__FUNCTION__, NIPADDR(tip));
// // TO DO IF NECESSARY
// break;
//
default:
SGI_IF_ERROR("%s UNHANDLED ether type %d of incoming egress packet\n", __FUNCTION__, eh_p->ether_type);
return;
}
message_p = itti_alloc_new_message(TASK_FW_IP, GTPV1U_TUNNEL_DATA_REQ);
if (message_p == NULL) {
SGI_IF_ERROR("%s OUT OF MEMORY DROP EGRESS PACKET\n", __FUNCTION__);
return;
}
message_payload_p = malloc(packet_sizeP);
if (message_payload_p == NULL) {
SGI_IF_ERROR("%s OUT OF MEMORY DROP EGRESS PACKET\n", __FUNCTION__);
return;
}
memcpy(message_payload_p, data_pP, packet_sizeP);
gtpv1u_tunnel_data_req_p = &message_p->ittiMsg.gtpv1uTunnelDataReq;
//LG HACK gtpv1u_tunnel_data_req_p->S1u_enb_teid = addr_mapping_p->enb_S1U_teid;
#warning forced S1u_enb_teid to 1 for testing, waiting for MODIFY_BEARER REQUEST
gtpv1u_tunnel_data_req_p->S1u_enb_teid = 1;
gtpv1u_tunnel_data_req_p->local_S1u_teid = addr_mapping_p->sgw_S1U_teid;
gtpv1u_tunnel_data_req_p->length = packet_sizeP;
gtpv1u_tunnel_data_req_p->buffer = message_payload_p;
SGI_IF_DEBUG("%s send GTPV1U_TUNNEL_DATA_REQ to GTPV1U S1u_enb_teid %u local_S1u_teid %u size %u\n", __FUNCTION__, gtpv1u_tunnel_data_req_p->S1u_enb_teid, gtpv1u_tunnel_data_req_p->local_S1u_teid, packet_sizeP);
itti_send_msg_to_task(TASK_GTPV1_U, INSTANCE_DEFAULT, message_p);
}
#else
void sgi_process_raw_packet(sgi_data_t *sgi_data_pP, unsigned char* data_pP, int packet_sizeP)
{
Gtpv1uTunnelDataReq *gtpv1u_tunnel_data_req_p = NULL;
MessageDef *message_p = NULL;
unsigned char *message_payload_p = NULL ;
struct ether_header *eh_p = (struct ether_header *) data_pP;
struct arphdr *arph_p = NULL;
struct iphdr *iph_p = NULL;
struct ipv6hdr *ip6h_p = NULL;
sgi_addr_mapping_t *addr_mapping_p = NULL;
struct in6_addr dest6_addr;
u_int32_t dest4_addr;
u_int32_t src4_addr;
struct in_addr in_dest_addr;
SGI_IF_DEBUG("--------------------------------------------------------------\n%s :\n", __FUNCTION__);
sgi_print_hex_octets(data_pP, packet_sizeP);
switch (htons(eh_p->ether_type)) {
//*******************
case ETHERTYPE_IP:
//*******************
iph_p = (struct iphdr *) (data_pP + sizeof(struct ether_header));
dest4_addr = iph_p->daddr;
if (hashtable_get(sgi_data_pP->addr_v4_mapping, dest4_addr, (void**)&addr_mapping_p) != HASH_TABLE_OK) {
if (sgi_data_pP->ipv4_addr == dest4_addr) {
SGI_IF_DEBUG("%s Dropping incoming egress IPV4 packet not UE IP flow\n", __FUNCTION__);
return;
} else {
in_dest_addr.s_addr = dest4_addr;
SGI_IF_WARNING("%s Dropping incoming egress IPV4 packet, IPV4 dest %s not found \n", __FUNCTION__, inet_ntoa(in_dest_addr));
return;
}
}
break;
//*******************
case ETHERTYPE_IPV6:
//*******************
ip6h_p = (struct ipv6hdr *) (data_pP + sizeof(struct ether_header));
memcpy(dest6_addr.__in6_u.__u6_addr8, ip6h_p->daddr.__in6_u.__u6_addr8, 16);
if (obj_hashtable_get(sgi_data_pP->addr_v6_mapping, (void*)&dest6_addr, sizeof(struct in6_addr), (void**)&addr_mapping_p) != HASH_TABLE_OK) {
SGI_IF_WARNING("%s Dropping incoming egress IPV6 packet, IPV6 dest %X:%X:%X:%X:%X:%X:%X:%X not found \n", __FUNCTION__, NIP6ADDR(&dest6_addr));
return;
}
break;
//*******************
case ETHERTYPE_REVARP:
//*******************
SGI_IF_ERROR("%s UNHANDLED ETHERTYPE_REVARP of incoming egress packet\n", __FUNCTION__);
return;
break;
//*******************
case ETHERTYPE_ARP:
//*******************
SGI_IF_DEBUG("%s HANDLED ETHERTYPE_ARP of incoming egress packet\n", __FUNCTION__);
arph_p = (struct arphdr *) (data_pP + sizeof(struct ether_header));
// The entry should be here but all signalling tied with RRC procedures not finished so
// a data packet can arrive before the MODIFY_BEARER REQUEST
// get " unsigned char __ar_tip[4]; /* Target IP address. */" (from /usr/include/net/if_apr.h line 68)
memcpy(&dest4_addr, &((unsigned char*)(&arph_p[1]))[ETH_ALEN*2+4], 4);
SGI_IF_DEBUG("%s ARP OPCODE %s TARGET IP %d.%d.%d.%d\n", __FUNCTION__, sgi_arpopcode_2_str(ntohl(arph_p->ar_op)), NIPADDR(dest4_addr));
if (hashtable_get(sgi_data_pP->addr_v4_mapping, dest4_addr, (void**)&addr_mapping_p) != HASH_TABLE_OK) {
if (sgi_data_pP->ipv4_addr == dest4_addr) {
SGI_IF_DEBUG("%s Dropping incoming egress IPV4 packet not UE IP flow\n", __FUNCTION__);
return;
} else {
if (sgi_data_pP->hw_address_of_router_captured) {
in_dest_addr.s_addr = dest4_addr;
SGI_IF_WARNING("%s Dropping incoming egress IPV4 packet, IPV4 dest %s not found \n", __FUNCTION__, inet_ntoa(in_dest_addr));
} else {
// may be a response to our ARP request to router
if (htons(arph_p->ar_op) == ARPOP_REPLY) {
memcpy(&src4_addr, &((unsigned char*)(&arph_p[1]))[ETH_ALEN], 4);
SGI_IF_DEBUG("%s FOR ROUTER HW ADDRESS COMPARING: %d - %d %d - %d\n",
__FUNCTION__,
sgi_data_pP->local_addr_v4_4_hw_address_router_capture,
dest4_addr,
sgi_data_pP->ipv4_addr_of_router,
src4_addr);
if ((sgi_data_pP->local_addr_v4_4_hw_address_router_capture == dest4_addr) && (sgi_data_pP->ipv4_addr_of_router == src4_addr)) {
sgi_data_pP->hw_address_of_router_captured = 1;
sgi_data_pP->eh.ether_dhost[0] = ((unsigned char*)(&arph_p[1]))[0];
sgi_data_pP->eh.ether_dhost[1] = ((unsigned char*)(&arph_p[1]))[1];
sgi_data_pP->eh.ether_dhost[2] = ((unsigned char*)(&arph_p[1]))[2];
sgi_data_pP->eh.ether_dhost[3] = ((unsigned char*)(&arph_p[1]))[3];
sgi_data_pP->eh.ether_dhost[4] = ((unsigned char*)(&arph_p[1]))[4];
sgi_data_pP->eh.ether_dhost[5] = ((unsigned char*)(&arph_p[1]))[5];
SGI_IF_DEBUG("%s FOUND ROUTER HW ADDRESS: %02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__, NMACADDR(sgi_data_pP->eh.ether_dhost));
}
}
}
return;
}
}
break;
default:
SGI_IF_ERROR("%s UNHANDLED ether type %d of incoming egress packet\n", __FUNCTION__, eh_p->ether_type);
return;
}
message_p = itti_alloc_new_message(TASK_FW_IP, GTPV1U_TUNNEL_DATA_REQ);
if (message_p == NULL) {
SGI_IF_ERROR("%s OUT OF MEMORY DROP EGRESS PACKET\n", __FUNCTION__);
return;
}
message_payload_p = malloc(packet_sizeP - sizeof(sgi_data_pP->eh));
if (message_payload_p == NULL) {
SGI_IF_ERROR("%s OUT OF MEMORY DROP EGRESS PACKET\n", __FUNCTION__);
return;
}
memcpy(message_payload_p, data_pP+sizeof(sgi_data_pP->eh), packet_sizeP - sizeof(sgi_data_pP->eh));
gtpv1u_tunnel_data_req_p = &message_p->ittiMsg.gtpv1uTunnelDataReq;
gtpv1u_tunnel_data_req_p->S1u_enb_teid = addr_mapping_p->enb_S1U_teid;
//#warning forced S1u_enb_teid to 1 for testing, waiting for MODIFY_BEARER REQUEST
// gtpv1u_tunnel_data_req_p->S1u_enb_teid = 1;
gtpv1u_tunnel_data_req_p->local_S1u_teid = addr_mapping_p->sgw_S1U_teid;
gtpv1u_tunnel_data_req_p->length = packet_sizeP;
gtpv1u_tunnel_data_req_p->buffer = message_payload_p;
SGI_IF_DEBUG("%s send GTPV1U_TUNNEL_DATA_REQ to GTPV1U S1u_enb_teid %u local_S1u_teid %u size %u\n", __FUNCTION__, gtpv1u_tunnel_data_req_p->S1u_enb_teid, gtpv1u_tunnel_data_req_p->local_S1u_teid, packet_sizeP);
itti_send_msg_to_task(TASK_GTPV1_U, INSTANCE_DEFAULT, message_p);
}
#endif
#endif
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