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82c4380a4e6af719d18a9bde1e71a7d00a2c2ab2
openairinterface5g/openair2/NETWORK_DRIVER/LITE/common.c
T
Cedric Roux aea6b4b5a6 fix a lot of file mode 
For whatever reason most of the files had their permission
changed from 644 to 755, which is not wanted.
2019-01-07 16:22:28 +01:00

452 lines
15 KiB
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 common.c
* \brief implementation of emultor tx and rx
* \author Navid Nikaein, Lionel GAUTHIER, and Raymomd Knopp
* \date 2011
* \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>
#ifdef OAI_NW_DRIVER_TYPE_ETHERNET
#include <linux/etherdevice.h>
#endif
#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 oai_nw_drv_common_class_wireless2ip(uint16_t dlen,
void *pdcp_sdu,
int inst,
OaiNwDrvRadioBearerId_t rb_id)
{
//---------------------------------------------------------------------------
struct sk_buff *skb;
struct ipversion *ipv;
struct oai_nw_drv_priv *gpriv=netdev_priv(oai_nw_drv_dev[inst]);
unsigned int hard_header_len = 0;
uint16_t *p_ether_type;
uint16_t ether_type;
#ifdef OAI_DRV_DEBUG_RECEIVE
int i;
unsigned char *addr;
#endif
unsigned char protocol;
struct iphdr *network_header;
#ifdef NAS_ADDRESS_FIX
uint32_t odaddr,osaddr;
unsigned char *addr,*daddr,*saddr,*ifaddr;
uint16_t *cksum,check;
#endif // NAS_ADDRESS_FIX
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] begin RB %d Inst %d Length %d bytes\n",__FUNCTION__, rb_id,inst,dlen);
#endif
skb = dev_alloc_skb( dlen + 2 );
if(!skb) {
printk("[OAI_IP_DRV][%s] low on memory\n",__FUNCTION__);
++gpriv->stats.rx_dropped;
return;
}
skb_reserve(skb,2);
memcpy(skb_put(skb, dlen), pdcp_sdu,dlen);
skb->dev = oai_nw_drv_dev[inst];
hard_header_len = oai_nw_drv_dev[inst]->hard_header_len;
skb_set_mac_header(skb, 0);
skb_set_network_header(skb, hard_header_len);
skb->mark = rb_id;
skb->pkt_type = PACKET_HOST;
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] Receiving packet @%p of size %d from PDCP \n",__FUNCTION__, skb->data, skb->len);
for (i=0; i<skb->len; i++)
printk("%2x ",((unsigned char *)(skb->data))[i]);
printk("\n");
#endif
// LG TEST skb->ip_summed = CHECKSUM_NONE;
skb->ip_summed = CHECKSUM_UNNECESSARY;
ipv = (struct ipversion *)skb_network_header(skb);
switch (ipv->version) {
case 6:
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] receive IPv6 message\n",__FUNCTION__);
#endif
skb_set_network_header(skb, hard_header_len);
//skb->network_header = &skb->data[hard_header_len];
if (hard_header_len == 0) {
skb->protocol = htons(ETH_P_IPV6);
} else {
#ifdef OAI_NW_DRIVER_TYPE_ETHERNET
skb->protocol = eth_type_trans(skb, oai_nw_drv_dev[inst]);
#else
#endif
}
//printk("Writing packet with protocol %x\n",ntohs(skb->protocol));
break;
case 4:
#ifdef NAS_ADDRESS_FIX
// Make the third byte of both the source and destination equal to the fourth of the destination
daddr = (unsigned char *)&((struct iphdr *)&skb->data[hard_header_len])->daddr;
odaddr = ((struct iphdr *)skb->data)->daddr;
//sn = addr[3];
saddr = (unsigned char *)&((struct iphdr *)&skb->data[hard_header_len])->saddr;
osaddr = ((struct iphdr *)&skb->data[hard_header_len])->saddr;
if (daddr[0] == saddr[0]) {// same network
daddr[2] = daddr[3]; // set third byte of destination to that of local machine so that local IP stack accepts the packet
saddr[2] = daddr[3]; // set third byte of source to that of local machine so that local IP stack accepts the packet
} else { // get the 3rd byte from device address in net_device structure
ifaddr = (unsigned char *)(&(((struct in_device *)((oai_nw_drv_dev[inst])->ip_ptr))->ifa_list->ifa_local));
if (saddr[0] == ifaddr[0]) { // source is in same network as local machine
daddr[0] += saddr[3]; // fix address of remote destination to undo change at source
saddr[2] = ifaddr[2]; // set third byte to that of local machine so that local IP stack accepts the packet
} else { // source is remote machine from outside network
saddr[0] -= daddr[3]; // fix address of remote source to be understood by destination
daddr[2] = daddr[3]; // fix 3rd byte of local address to be understood by IP stack of
// destination
}
}
#endif //NAS_ADDRESS_FIX
#ifdef OAI_DRV_DEBUG_RECEIVE
//printk("NAS_TOOL_RECEIVE: receive IPv4 message\n");
addr = (unsigned char *)&((struct iphdr *)&skb->data[hard_header_len])->saddr;
if (addr) {
//addr[2]^=0x01;
printk("[OAI_IP_DRV][%s] Source %d.%d.%d.%d\n",__FUNCTION__, addr[0],addr[1],addr[2],addr[3]);
}
addr = (unsigned char *)&((struct iphdr *)&skb->data[hard_header_len])->daddr;
if (addr) {
//addr[2]^=0x01;
printk("[OAI_IP_DRV][%s] Dest %d.%d.%d.%d\n",__FUNCTION__, addr[0],addr[1],addr[2],addr[3]);
}
printk("[OAI_IP_DRV][%s] protocol %d\n",__FUNCTION__, ((struct iphdr *)&skb->data[hard_header_len])->protocol);
#endif
skb_set_network_header(skb, hard_header_len);
//skb->network_header = &skb->data[hard_header_len];
network_header = (struct iphdr *)skb_network_header(skb);
protocol = network_header->protocol;
#ifdef OAI_DRV_DEBUG_RECEIVE
switch (protocol) {
case IPPROTO_IP:
printk("[OAI_IP_DRV][%s] Received Raw IPv4 packet\n",__FUNCTION__);
break;
case IPPROTO_IPV6:
printk("[OAI_IP_DRV][%s] Received Raw IPv6 packet\n",__FUNCTION__);
break;
case IPPROTO_ICMP:
printk("[OAI_IP_DRV][%s] Received Raw ICMP packet\n",__FUNCTION__);
break;
case IPPROTO_TCP:
printk("[OAI_IP_DRV][%s] Received TCP packet\n",__FUNCTION__);
break;
case IPPROTO_UDP:
printk("[OAI_IP_DRV][%s] Received UDP packet\n",__FUNCTION__);
break;
default:
break;
}
#endif
#ifdef NAS_ADDRESS_FIX
network_header->check = 0;
network_header->check = ip_fast_csum((unsigned char *) network_header, network_header->ihl);
//printk("[OAI_IP_DRV][COMMON][RECEIVE] IP Fast Checksum %x \n", network_header->check);
switch(protocol) {
case IPPROTO_TCP:
cksum = (uint16_t*)&(((struct tcphdr*)((network_header + (network_header->ihl<<2))))->check);
check = csum_tcpudp_magic(((struct iphdr *)network_header)->saddr, ((struct iphdr *)network_header)->daddr, 0,0, ~(*cksum));
//check = csum_tcpudp_magic(((struct iphdr *)network_header)->saddr, ((struct iphdr *)network_header)->daddr, tcp_hdrlen(skb), IPPROTO_TCP, ~(*cksum));
//check = csum_tcpudp_magic(((struct iphdr *)network_header)->saddr, ((struct iphdr *)network_header)->daddr, dlen, IPPROTO_TCP, ~(*cksum));
*cksum = csum_tcpudp_magic(~osaddr, ~odaddr, 0, 0, ~check);
//*cksum = csum_tcpudp_magic(~osaddr, ~odaddr, dlen, IPPROTO_TCP, ~check);
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] Inst %d TCP packet calculated CS %x, CS = %x (before), SA (%x)%x, DA (%x)%x\n",__FUNCTION__,
inst,
network_header->check,
*cksum,
osaddr,
((struct iphdr *)skb->data)->saddr,
odaddr,
((struct iphdr *)skb->data)->daddr);
printk("[OAI_IP_DRV][%s] Inst %d TCP packet NEW CS %x\n",__FUNCTION__,
inst,
*cksum);
#endif
break;
case IPPROTO_UDP:
cksum = (uint16_t*)&(((struct udphdr*)((network_header + (network_header->ihl<<2))))->check);
check = csum_tcpudp_magic(((struct iphdr *)network_header)->saddr, ((struct iphdr *)network_header)->daddr, 0,0, ~(*cksum));
// check = csum_tcpudp_magic(((struct iphdr *)network_header)->saddr, ((struct iphdr *)network_header)->daddr, udp_hdr(skb)->len, IPPROTO_UDP, ~(*cksum));
//check = csum_tcpudp_magic(((struct iphdr *)network_header)->saddr, ((struct iphdr *)network_header)->daddr, dlen, IPPROTO_UDP, ~(*cksum));
*cksum= csum_tcpudp_magic(~osaddr, ~odaddr,0,0, ~check);
//*cksum= csum_tcpudp_magic(~osaddr, ~odaddr,udp_hdr(skb)->len, IPPROTO_UDP, ~check);
//*cksum= csum_tcpudp_magic(~osaddr, ~odaddr,dlen, IPPROTO_UDP, ~check);
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] Inst %d UDP packet CS = %x (before), SA (%x)%x, DA (%x)%x\n",__FUNCTION__,
inst,*cksum,osaddr,((struct iphdr *)&skb->data[hard_header_len])->saddr,odaddr,((struct iphdr *)&skb->data[hard_header_len])->daddr);
printk("[OAI_IP_DRV][%s] Inst %d UDP packet NEW CS %x\n",__FUNCTION__,inst,*cksum);
#endif
//if ((check = *cksum) != 0) {
// src, dst, len, proto, sum
// }
break;
default:
break;
}
#endif //NAS_ADDRESS_FIX
if (hard_header_len == 0) {
skb->protocol = htons(ETH_P_IP);
} else {
#ifdef OAI_NW_DRIVER_TYPE_ETHERNET
skb->protocol = eth_type_trans(skb, oai_nw_drv_dev[inst]);
#else
#endif
}
//printk("[OAI_IP_DRV][COMMON] Writing packet with protocol %x\n",ntohs(skb->protocol));
break;
default:
// fill skb->pkt_type, skb->dev
skb->protocol = eth_type_trans(skb, oai_nw_drv_dev[inst]);
// minus 1(short) instead of 2(bytes) because uint16_t*
p_ether_type = (uint16_t *)(skb_network_header(skb)-2);
ether_type = ntohs(*p_ether_type);
switch (ether_type) {
case ETH_P_ARP:
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] ether_type = ETH_P_ARP\n",__FUNCTION__);
#endif
//skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_ARP);
break;
default:
;
}
printk("[OAI_IP_DRV][%s] begin RB %d Inst %d Length %d bytes\n",__FUNCTION__,rb_id,inst,dlen);
printk("[OAI_IP_DRV][%s] Inst %d: receive unknown message (version=%d)\n",__FUNCTION__,inst,ipv->version);
}
++gpriv->stats.rx_packets;
gpriv->stats.rx_bytes += dlen;
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] sending packet of size %d to kernel\n",__FUNCTION__,skb->len);
for (i=0; i<skb->len; i++)
printk("%2x ",((unsigned char *)(skb->data))[i]);
printk("\n");
#endif //OAI_DRV_DEBUG_RECEIVE
netif_rx_ni(skb);
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] end\n",__FUNCTION__);
#endif
}
//---------------------------------------------------------------------------
// Delete the data
void oai_nw_drv_common_ip2wireless_drop(struct sk_buff *skb, int inst)
{
//---------------------------------------------------------------------------
struct oai_nw_drv_priv *priv=netdev_priv(oai_nw_drv_dev[inst]);
++priv->stats.tx_dropped;
}
//---------------------------------------------------------------------------
// Request the transfer of data (QoS SAP)
void oai_nw_drv_common_ip2wireless(struct sk_buff *skb, int inst)
{
//---------------------------------------------------------------------------
struct pdcp_data_req_header_s pdcph;
struct oai_nw_drv_priv *priv=netdev_priv(oai_nw_drv_dev[inst]);
#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("[OAI_IP_DRV][%s] inst %d begin \n",__FUNCTION__,inst);
#endif
if (skb==NULL) {
#ifdef OAI_DRV_DEBUG_SEND
printk("[OAI_IP_DRV][%s] input parameter skb is NULL \n",__FUNCTION__);
#endif
return;
}
pdcph.data_size = skb->len;
pdcph.rb_id = skb->mark;
pdcph.inst = inst;
pdcph.traffic_type = oai_nw_drv_find_traffic_type(skb);
bytes_wrote = oai_nw_drv_netlink_send((char *)&pdcph,OAI_NW_DRV_PDCPH_SIZE);
#ifdef OAI_DRV_DEBUG_SEND
printk("[OAI_IP_DRV][%s] Wrote %d bytes (header for %d byte skb) to PDCP RB %d via netlink\n",__FUNCTION__,
bytes_wrote,skb->len, pdcph.rb_id);
#endif
if (bytes_wrote != OAI_NW_DRV_PDCPH_SIZE) {
printk("[OAI_IP_DRV][%s] problem while writing PDCP's header (bytes wrote = %d to fifo %d)\n",__FUNCTION__,bytes_wrote,IP2PDCP_FIFO);
printk("rb_id %u, Wrote %u, Header Size %lu \n", pdcph.rb_id , bytes_wrote, OAI_NW_DRV_PDCPH_SIZE);
priv->stats.tx_dropped ++;
return;
}
bytes_wrote += oai_nw_drv_netlink_send((char *)skb->data,skb->len);
if (bytes_wrote != skb->len+OAI_NW_DRV_PDCPH_SIZE) {
printk("[OAI_IP_DRV][%s] Inst %d, RB_ID %u: problem while writing PDCP's data, bytes_wrote = %u, Data_len %u, PDCPH_SIZE %lu\n",
__FUNCTION__,
inst,
pdcph.rb_id,
bytes_wrote,
skb->len,
OAI_NW_DRV_PDCPH_SIZE); // congestion
priv->stats.tx_dropped ++;
return;
}
#ifdef OAI_DRV_DEBUG_SEND
printk("[OAI_IP_DRV][%s] Sending packet of size %d to PDCP traffic type %d\n",__FUNCTION__,skb->len, pdcph.traffic_type);
for (j=0; j<skb->len; j++)
printk("%2x ",((unsigned char *)(skb->data))[j]);
printk("\n");
#endif
priv->stats.tx_bytes += skb->len;
priv->stats.tx_packets ++;
#ifdef OAI_DRV_DEBUG_SEND
printk("[OAI_IP_DRV][%s] end \n",__FUNCTION__);
#endif
}
//---------------------------------------------------------------------------
void oai_nw_drv_common_wireless2ip(struct nlmsghdr *nlh)
{
//---------------------------------------------------------------------------
struct pdcp_data_ind_header_s *pdcph = (struct pdcp_data_ind_header_s *)NLMSG_DATA(nlh);
struct oai_nw_drv_priv *priv;
priv = netdev_priv(oai_nw_drv_dev[pdcph->inst]);
#ifdef OAI_DRV_DEBUG_RECEIVE
printk("[OAI_IP_DRV][%s] QOS receive from PDCP, size %d, rab %d, inst %d\n",__FUNCTION__,
pdcph->data_size,pdcph->rb_id,pdcph->inst);
#endif //OAI_DRV_DEBUG_RECEIVE
oai_nw_drv_common_class_wireless2ip(pdcph->data_size,
(unsigned char *)NLMSG_DATA(nlh) + OAI_NW_DRV_PDCPH_SIZE,
pdcph->inst,
pdcph->rb_id);
}
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