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openairinterface5g/openair2/NETWORK_DRIVER/UE_IP/common.c
T
Robert Schmidt 4c7035e6e3 Remove UESIM_EXPANSION 
This completely removes the UESIM_EXPANSION define: it does not compile
at the moment. Its function was to multiplex multiple UEs on the same
TUN interface. However, this functionality is not needed since it is
possible to allocate many TUN devices (i.e., >= 32).
2020-10-13 09:07:46 +02:00

360 lines
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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 common.c
* \brief
* \author Navid Nikaein and Raymond Knopp, Lionel GAUTHIER
* \date 2013
* \version 1.0
* \company Eurecom
* \email: navid.nikaein@eurecom.fr, lionel.gauthier@eurecom.fr
*/
#include "local.h"
#include "proto_extern.h"
#ifndef OAI_NW_DRIVER_USE_NETLINK
#include "rtai_fifos.h"
#endif
#include <linux/inetdevice.h>
#include <net/tcp.h>
#include <net/udp.h>
#define NIPADDR(addr) \
(uint8_t)(addr & 0x000000FF), \
(uint8_t)((addr & 0x0000FF00) >> 8), \
(uint8_t)((addr & 0x00FF0000) >> 16), \
(uint8_t)((addr & 0xFF000000) >> 24)
#define NIP6ADDR(addr) \
ntohs((addr)->s6_addr16[0]), \
ntohs((addr)->s6_addr16[1]), \
ntohs((addr)->s6_addr16[2]), \
ntohs((addr)->s6_addr16[3]), \
ntohs((addr)->s6_addr16[4]), \
ntohs((addr)->s6_addr16[5]), \
ntohs((addr)->s6_addr16[6]), \
ntohs((addr)->s6_addr16[7])
//#define OAI_DRV_DEBUG_SEND
//#define OAI_DRV_DEBUG_RECEIVE
void
ue_ip_common_class_wireless2ip(
sdu_size_t data_lenP,
void *pdcp_sdu_pP,
int instP,
rb_id_t rb_idP) {
//---------------------------------------------------------------------------
struct sk_buff *skb_p = NULL;
ipversion_t *ipv_p = NULL;
ue_ip_priv_t *gpriv_p = netdev_priv(ue_ip_dev[instP]);
unsigned int hard_header_len = 0;
#ifdef OAI_DRV_DEBUG_RECEIVE
int i;
unsigned char *addr_p = 0;
#endif
unsigned char protocol;
struct iphdr *network_header_p = NULL;
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] begin RB %d Inst %d Length %d bytes\n",__FUNCTION__, rb_idP,instP,data_lenP);
#endif
skb_p = dev_alloc_skb( data_lenP + 2 );
if(!skb_p) {
printk("[UE_IP_DRV][%s] low on memory\n",__FUNCTION__);
++gpriv_p->stats.rx_dropped;
return;
}
skb_reserve(skb_p,2);
memcpy(skb_put(skb_p, data_lenP), pdcp_sdu_pP,data_lenP);
skb_p->dev = ue_ip_dev[instP];
hard_header_len = ue_ip_dev[instP]->hard_header_len;
skb_set_mac_header(skb_p, 0);
skb_set_network_header(skb_p, hard_header_len);
skb_p->mark = rb_idP;
//printk("[NAC_COMMIN_RECEIVE]: Packet Type %d (%d,%d)",skb_p->pkt_type,PACKET_HOST,PACKET_BROADCAST);
skb_p->pkt_type = PACKET_HOST;
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] Receiving packet of size %d from PDCP \n",__FUNCTION__, skb_p->len);
for (i=0; i<skb_p->len; i++) {
printk("%2x ",((unsigned char *)(skb_p->data))[i]);
}
printk("\n");
#endif
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] skb_p->data @ %p\n",__FUNCTION__, skb_p->data);
printk("[UE_IP_DRV][%s] skb_p->mac_header @ %p\n",__FUNCTION__, skb_p->mac_header);
#endif
// LG TEST skb_p->ip_summed = CHECKSUM_NONE;
skb_p->ip_summed = CHECKSUM_UNNECESSARY;
ipv_p = (ipversion_t *)((void *)&(skb_p->data[hard_header_len]));
switch (ipv_p->version) {
case 6:
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] receive IPv6 message\n",__FUNCTION__);
#endif
skb_set_network_header(skb_p, hard_header_len);
//skb_p->network_header_p = &skb_p->data[hard_header_len];
if (hard_header_len == 0) {
skb_p->protocol = htons(ETH_P_IPV6);
} else {
#ifdef OAI_NW_DRIVER_TYPE_ETHERNET
skb_p->protocol = eth_type_trans(skb_p, ue_ip_dev[instP]);
#else
#endif
}
//printk("Writing packet with protocol %x\n",ntohs(skb_p->protocol));
break;
case 4:
#ifdef OAI_DRV_DEBUG_RECEIVE
//printk("NAS_TOOL_RECEIVE: receive IPv4 message\n");
addr_p = (unsigned char *)&((struct iphdr *)&skb_p->data[hard_header_len])->saddr;
if (addr_p) {
printk("[UE_IP_DRV][%s] Source %d.%d.%d.%d\n",__FUNCTION__, addr_p[0],addr_p[1],addr_p[2],addr_p[3]);
}
addr_p = (unsigned char *)&((struct iphdr *)&skb_p->data[hard_header_len])->daddr;
if (addr_p) {
printk("[UE_IP_DRV][%s] Dest %d.%d.%d.%d\n",__FUNCTION__, addr_p[0],addr_p[1],addr_p[2],addr_p[3]);
}
printk("[UE_IP_DRV][%s] protocol %d\n",__FUNCTION__, ((struct iphdr *)&skb_p->data[hard_header_len])->protocol);
#endif
skb_set_network_header(skb_p, hard_header_len);
//network_header_p = (struct iphdr *)skb_network_header(skb_p);
network_header_p = (struct iphdr *)skb_network_header(skb_p);
protocol = network_header_p->protocol;
#ifdef OAI_DRV_DEBUG_RECEIVE
switch (protocol) {
case IPPROTO_IP:
printk("[UE_IP_DRV][%s] Received Raw IPv4 packet\n",__FUNCTION__);
break;
case IPPROTO_IPV6:
printk("[UE_IP_DRV][%s] Received Raw IPv6 packet\n",__FUNCTION__);
break;
case IPPROTO_ICMP:
printk("[UE_IP_DRV][%s] Received Raw ICMP packet\n",__FUNCTION__);
break;
case IPPROTO_TCP:
printk("[UE_IP_DRV][%s] Received TCP packet\n",__FUNCTION__);
break;
case IPPROTO_UDP:
printk("[UE_IP_DRV][%s] Received UDP packet\n",__FUNCTION__);
break;
default:
break;
}
#endif
if (hard_header_len == 0) {
skb_p->protocol = htons(ETH_P_IP);
}
//printk("[UE_IP_DRV][COMMON] Writing packet with protocol %x\n",ntohs(skb_p->protocol));
break;
default:
printk("[UE_IP_DRV][%s] begin RB %ld Inst %d Length %d bytes\n",__FUNCTION__,rb_idP,instP,data_lenP);
printk("[UE_IP_DRV][%s] Inst %d: receive unknown message (version=%d)\n",__FUNCTION__,instP,ipv_p->version);
}
++gpriv_p->stats.rx_packets;
gpriv_p->stats.rx_bytes += data_lenP;
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] sending packet of size %d to kernel\n",__FUNCTION__,skb_p->len);
for (i=0; i<skb_p->len; i++) {
printk("%2x ",((unsigned char *)(skb_p->data))[i]);
}
printk("\n");
#endif //OAI_DRV_DEBUG_RECEIVE
netif_rx_ni(skb_p);
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] end\n",__FUNCTION__);
#endif
}
//---------------------------------------------------------------------------
// Delete the data
void ue_ip_common_ip2wireless_drop(struct sk_buff *skb_pP, int instP) {
//---------------------------------------------------------------------------
ue_ip_priv_t *priv_p=netdev_priv(ue_ip_dev[instP]);
++priv_p->stats.tx_dropped;
}
//---------------------------------------------------------------------------
// Request the transfer of data (QoS SAP)
void
ue_ip_common_ip2wireless(
struct sk_buff *skb_pP,
int instP
) {
//---------------------------------------------------------------------------
struct pdcp_data_req_header_s pdcph;
ue_ip_priv_t *priv_p=netdev_priv(ue_ip_dev[instP]);
ipversion_t *ipv_p = NULL;
unsigned int hard_header_len = 0;
unsigned char *src_addr = 0;
unsigned char *dst_addr = 0;
#ifdef LOOPBACK_TEST
int i;
#endif
#ifdef OAI_DRV_DEBUG_SEND
int j;
#endif
unsigned int bytes_wrote;
// Start debug information
#ifdef OAI_DRV_DEBUG_SEND
printk("[UE_IP_DRV][%s] inst %d begin \n",__FUNCTION__,instP);
#endif
if (skb_pP==NULL) {
#ifdef OAI_DRV_DEBUG_SEND
printk("[UE_IP_DRV][%s] input parameter skb is NULL \n",__FUNCTION__);
#endif
return;
}
pdcph.data_size = skb_pP->len;
if (skb_pP->mark) {
pdcph.rb_id = skb_pP->mark;
} else {
pdcph.rb_id = UE_IP_DEFAULT_RAB_ID;
}
pdcph.inst = instP;
//pass source/destination IP addresses to PDCP header
hard_header_len = ue_ip_dev[instP]->hard_header_len;
ipv_p = (ipversion_t *)((void *)&(skb_pP->data[hard_header_len]));
switch (ipv_p->version) {
case 6:
printk("[UE_IP_DRV][%s] receive IPv6 message\n",__FUNCTION__);
//TODO
break;
case 4:
src_addr = (unsigned char *)&((struct iphdr *)&skb_pP->data[hard_header_len])->saddr;
if (src_addr) {
printk("[UE_IP_DRV][%s] Source %d.%d.%d.%d\n",__FUNCTION__, src_addr[0],src_addr[1],src_addr[2],src_addr[3]);
}
dst_addr = (unsigned char *)&((struct iphdr *)&skb_pP->data[hard_header_len])->daddr;
if (dst_addr) {
printk("[UE_IP_DRV][%s] Dest %d.%d.%d.%d\n",__FUNCTION__, dst_addr[0],dst_addr[1],dst_addr[2],dst_addr[3]);
}
//get Ipv4 address and pass to PCDP header
printk("[UE_IP_DRV] source Id: 0x%08x\n",pdcph.sourceL2Id );
printk("[UE_IP_DRV] destinationL2Id Id: 0x%08x\n",pdcph.destinationL2Id );
pdcph.sourceL2Id = ntohl( ((struct iphdr *)&skb_pP->data[hard_header_len])->saddr) & 0x00FFFFFF;
pdcph.destinationL2Id = ntohl( ((struct iphdr *)&skb_pP->data[hard_header_len])->daddr) & 0x00FFFFFF;
break;
default:
break;
}
bytes_wrote = ue_ip_netlink_send((char *)&pdcph,UE_IP_PDCPH_SIZE);
#ifdef OAI_DRV_DEBUG_SEND
printk("[UE_IP_DRV][%s] Wrote %d bytes (header for %d byte skb) to PDCP via netlink\n",__FUNCTION__,
bytes_wrote,skb_pP->len);
#endif
if (bytes_wrote != UE_IP_PDCPH_SIZE) {
printk("[UE_IP_DRV][%s] problem while writing PDCP's header (bytes wrote = %d)\n",__FUNCTION__,bytes_wrote);
printk("rb_id %ld, Wrote %d, Header Size %d \n", pdcph.rb_id, bytes_wrote, UE_IP_PDCPH_SIZE);
priv_p->stats.tx_dropped ++;
return;
}
bytes_wrote += ue_ip_netlink_send((char *)skb_pP->data,skb_pP->len);
if (bytes_wrote != skb_pP->len+UE_IP_PDCPH_SIZE) {
printk("[UE_IP_DRV][%s] Inst %d, RB_ID %ld: problem while writing PDCP's data, bytes_wrote = %d, Data_len %d, PDCPH_SIZE %d\n",
__FUNCTION__,
instP,
pdcph.rb_id,
bytes_wrote,
skb_pP->len,
UE_IP_PDCPH_SIZE); // congestion
priv_p->stats.tx_dropped ++;
return;
}
#ifdef OAI_DRV_DEBUG_SEND
printk("[UE_IP_DRV][%s] Sending packet of size %d to PDCP \n",__FUNCTION__,skb_pP->len);
for (j=0; j<skb_pP->len; j++) {
printk("%2x ",((unsigned char *)(skb_pP->data))[j]);
}
printk("\n");
#endif
priv_p->stats.tx_bytes += skb_pP->len;
priv_p->stats.tx_packets ++;
#ifdef OAI_DRV_DEBUG_SEND
printk("[UE_IP_DRV][%s] end \n",__FUNCTION__);
#endif
}
//---------------------------------------------------------------------------
void ue_ip_common_wireless2ip(struct nlmsghdr *nlh_pP) {
//---------------------------------------------------------------------------
struct pdcp_data_ind_header_s *pdcph_p = (struct pdcp_data_ind_header_s *)NLMSG_DATA(nlh_pP);
ue_ip_priv_t *priv_p;
priv_p = netdev_priv(ue_ip_dev[pdcph_p->inst]);
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[UE_IP_DRV][%s] QOS receive from PDCP, size %d, rab %d, inst %d\n",__FUNCTION__,
pdcph_p->data_size,pdcph_p->rb_id,pdcph_p->inst);
#endif
ue_ip_common_class_wireless2ip(pdcph_p->data_size,
(unsigned char *)NLMSG_DATA(nlh_pP) + UE_IP_PDCPH_SIZE,
pdcph_p->inst,
pdcph_p->rb_id);
}
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