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547a3a65cfdbee4a7f0f12f8d0b5c2a1feecfe21
openairinterface5g/openair2/NAS/DRIVER/LITE/common.c
T
Lionel Gauthier fd2bda1954 Log update 
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4794 818b1a75-f10b-46b9-bf7c-635c3b92a50f
2013-12-20 15:36:27 +00:00

427 lines
17 KiB
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/*******************************************************************************
Eurecom OpenAirInterface 2
Copyright(c) 1999 - 2010 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, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France
*******************************************************************************/
/*! \file common.c
* \brief implementation of emultor tx and rx
* \author Navid Nikaein and Raymomd Knopp, Lionel GAUTHIER
* \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(u16 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;
u16 *p_ether_type;
u16 ether_type;
#ifdef OAI_DRV_DEBUG_RECEIVE
int i;
unsigned char *addr;
#endif
unsigned char protocol;
struct iphdr *network_header;
#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 = (u16*)&(((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 = (u16*)&(((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 u16*
p_ether_type = (u16 *)(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(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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