/******************************************************************************* 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 nas_common.c * \brief implementation of emultor tx and rx * \author Navid Nikaein and Raymomd Knopp * \date 2011 * \version 1.0 * \company Eurecom * \email: navid.nikaein@eurecom.fr */ //#include "nas_common.h" #include "local.h" #include "proto_extern.h" #ifndef NAS_NETLINK #include "rtai_fifos.h" #endif //#define NAS_DEBUG_RECEIVE 1 //#define NAS_DEBUG_SEND 1 //#define NAS_DEBUG_CLASS 1 //#define NAS_ADDRESS_FIX 1 #include #include #include void nas_COMMON_receive(uint16_t dlen, void *pdcp_sdu, int inst, struct classifier_entity *rclass, nasRadioBearerId_t rb_id) { //--------------------------------------------------------------------------- struct sk_buff *skb; struct ipversion *ipv; struct nas_priv *gpriv=netdev_priv(nasdev[inst]); uint32_t odaddr,osaddr; int i; unsigned char protocol; unsigned char *addr,*daddr,*saddr,*ifaddr,sn; struct udphdr *uh; struct tcphdr *th; uint16_t *cksum,check; struct iphdr *network_header; #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_RECEIVE: begin RB %d Inst %d Length %d bytes\n",rb_id,inst,dlen); #endif skb = dev_alloc_skb( dlen + 2 ); if(!skb) { printk("NAS_COMMON_RECEIVE: low on memory\n"); ++gpriv->stats.rx_dropped; return; } skb_reserve(skb,2); memcpy(skb_put(skb, dlen), pdcp_sdu,dlen); skb->dev = nasdev[inst]; #ifdef KERNEL_VERSION_GREATER_THAN_2622 skb_reset_mac_header(skb); #else skb->mac.raw = skb->data; #endif //printk("[NAC_COMMIN_RECEIVE]: Packet Type %d (%d,%d)",skb->pkt_type,PACKET_HOST,PACKET_BROADCAST); skb->pkt_type = PACKET_HOST; if (rclass->version != NAS_MPLS_VERSION_CODE) { // This is an IP packet skb->ip_summed = CHECKSUM_NONE; ipv = (struct ipversion *)skb->data; switch (ipv->version) { case 6: #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_RECEIVE: receive IPv6 message\n"); #endif #ifdef KERNEL_VERSION_GREATER_THAN_2622 skb_reset_network_header(skb); #else skb->nh.ipv6h = (struct ipv6hdr *)skb->data; #endif skb->protocol = htons(ETH_P_IPV6); // 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)->daddr; odaddr = ((struct iphdr *)skb->data)->daddr; // sn = addr[3]; saddr = (unsigned char *)&((struct iphdr *)skb->data)->saddr; osaddr = ((struct iphdr *)skb->data)->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 *)((nasdev[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 NAS_DEBUG_RECEIVE // printk("NAS_TOOL_RECEIVE: receive IPv4 message\n"); addr = (unsigned char *)&((struct iphdr *)skb->data)->saddr; if (addr) { // addr[2]^=0x01; printk("[NAS][COMMON][RECEIVE] Source %d.%d.%d.%d\n",addr[0],addr[1],addr[2],addr[3]); } addr = (unsigned char *)&((struct iphdr *)skb->data)->daddr; if (addr){ // addr[2]^=0x01; printk("[NAS][COMMON][RECEIVE] Dest %d.%d.%d.%d\n",addr[0],addr[1],addr[2],addr[3]); } printk("[NAS][COMMON][RECEIVE] protocol %d\n",((struct iphdr *)skb->data)->protocol); #endif #ifdef KERNEL_VERSION_GREATER_THAN_2622 skb_reset_network_header(skb); network_header = (struct iphdr *)skb_network_header(skb); protocol = network_header->protocol; #else skb->nh.iph = (struct iphdr *)skb->data; protocol=skb->nh.iph->protocol; #endif #ifdef NAS_DEBUG_RECEIVE switch (protocol) { case IPPROTO_IP: printk("[NAS][COMMON][RECEIVE] Received Raw IPv4 packet\n"); break; case IPPROTO_IPV6: printk("[NAS][COMMON][RECEIVE] Received Raw IPv6 packet\n"); break; case IPPROTO_ICMP: printk("[NAS][COMMON][RECEIVE] Received Raw ICMP packet\n"); break; case IPPROTO_TCP: printk("[NAS][COMMON][RECEIVE] Received TCP packet\n"); break; case IPPROTO_UDP: printk("[NAS][COMMON][RECEIVE] Received UDP packet\n"); break; default: break; } #endif #ifdef NAS_ADDRESS_FIX #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_RECEIVE: dumping the packet before the csum recalculation\n",skb->len); for (i=0;ilen;i++) printk("%2x ",((unsigned char *)(skb->data))[i]); printk("\n"); #endif //NAS_DEBUG_RECEIVE #ifdef KERNEL_VERSION_GREATER_THAN_2622 network_header->check = 0; network_header->check = ip_fast_csum((unsigned char *) network_header, network_header->ihl); #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON][RECEIVE] IP Fast Checksum %x \n", network_header->check); #endif #else skb->nh.iph->check = 0; skb->nh.iph->check = ip_fast_csum((unsigned char *)skb->data, skb->nh.iph->ihl); #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON][RECEIVE] IP Fast Checksum %x \n", skb->nh.iph->check); #endif #endif // if (!(skb->nh.iph->frag_off & htons(IP_OFFSET))) { switch(protocol) { case IPPROTO_TCP: #ifdef KERNEL_VERSION_GREATER_THAN_2622 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, tcp_hdrlen(skb), IPPROTO_TCP, ~(*cksum)); #else cksum = (uint16_t*)&(((struct tcphdr*)((skb->data + (skb->nh.iph->ihl<<2))))->check); //check = csum_tcpudp_magic(((struct iphdr *)skb->data)->saddr, ((struct iphdr *)skb->data)->daddr,tcp_hdrlen(skb), IPPROTO_TCP, ~(*cksum)); #endif #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON] Inst %d TCP packet calculated CS %x, CS = %x (before), SA (%x)%x, DA (%x)%x\n", inst, network_header->check, *cksum, osaddr, ((struct iphdr *)skb->data)->saddr, odaddr, ((struct iphdr *)skb->data)->daddr); #endif check = csum_tcpudp_magic(((struct iphdr *)skb->data)->saddr, ((struct iphdr *)skb->data)->daddr,0,0, ~(*cksum)); *cksum = csum_tcpudp_magic(~osaddr, ~odaddr, 0, 0, ~check); #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON] Inst %d TCP packet NEW CS %x\n", inst, *cksum); #endif break; case IPPROTO_UDP: #ifdef KERNEL_VERSION_GREATER_THAN_2622 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, udp_hdr(skb)->len, IPPROTO_UDP, ~(*cksum)); #else cksum = (uint16_t*)&(((struct udphdr*)((skb->data + (skb->nh.iph->ihl<<2))))->check); //check = csum_tcpudp_magic(((struct iphdr *)skb->data)->saddr, ((struct iphdr *)skb->data)->daddr, udp_hdr(skb)->len, IPPROTO_UDP, ~(*cksum)); #endif #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON] Inst %d UDP packet CS = %x (before), SA (%x)%x, DA (%x)%x\n", inst, *cksum, osaddr, ((struct iphdr *)skb->data)->saddr, odaddr, ((struct iphdr *)skb->data)->daddr); #endif check = csum_tcpudp_magic(((struct iphdr *)skb->data)->saddr, ((struct iphdr *)skb->data)->daddr, 0,0, ~(*cksum)); *cksum= csum_tcpudp_magic(~osaddr, ~odaddr,0,0, ~check); //*cksum= csum_tcpudp_magic(~osaddr, ~odaddr,udp_hdr(skb)->len, IPPROTO_UDP, ~check); #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON] Inst %d UDP packet NEW CS %x\n", inst, *cksum); #endif // if ((check = *cksum) != 0) { // src, dst, len, proto, sum // } break; default: break; } // } //#endif // KERNEL VERSION > 22 #endif //NAS_ADDRESS_FIX skb->protocol = htons(ETH_P_IP); // printk("[NAS][COMMON] Writing packet with protocol %x\n",ntohs(skb->protocol)); break; default: printk("NAS_COMMON_RECEIVE: begin RB %d Inst %d Length %d bytes\n",rb_id,inst,dlen); printk("[NAS][COMMON] Inst %d: receive unknown message (version=%d)\n",inst,ipv->version); } } else { // This is an MPLS packet #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_RECEIVE: Received an MPLS packet on RB %d\n",rb_id); #endif skb->protocol = htons(ETH_P_MPLS_UC); } ++gpriv->stats.rx_packets; gpriv->stats.rx_bytes += dlen; #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_RECEIVE: sending packet of size %d to kernel\n",skb->len); for (i=0;ilen;i++) printk("%2x ",((unsigned char *)(skb->data))[i]); printk("\n"); #endif //NAS_DEBUG_RECEIVE netif_rx(skb); #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_RECEIVE: end\n"); #endif } //--------------------------------------------------------------------------- // Delete the data void nas_COMMON_del_send(struct sk_buff *skb, struct cx_entity *cx, struct classifier_entity *sp,int inst){ struct nas_priv *priv=netdev_priv(nasdev[inst]); //--------------------------------------------------------------------------- ++priv->stats.tx_dropped; } //--------------------------------------------------------------------------- // Request the transfer of data (QoS SAP) void nas_COMMON_QOS_send(struct sk_buff *skb, struct cx_entity *cx, struct classifier_entity *gc,int inst){ //--------------------------------------------------------------------------- struct pdcp_data_req_header_s pdcph; struct nas_priv *priv=netdev_priv(nasdev[inst]); #ifdef LOOPBACK_TEST int i; #endif unsigned int bytes_wrote; unsigned char j; // Start debug information #ifdef NAS_DEBUG_SEND printk("NAS_COMMON_QOS_SEND - inst %d begin \n",inst); #endif // if (cx->state!=NAS_STATE_CONNECTED) // <--- A REVOIR // { // priv->stats.tx_dropped ++; // printk("NAS_QOS_SEND: No connected, so message are dropped \n"); // return; // } if (skb==NULL){ #ifdef NAS_DEBUG_SEND printk("NAS_COMMON_QOS_SEND - input parameter skb is NULL \n"); #endif return; } if (gc==NULL){ #ifdef NAS_DEBUG_SEND printk("NAS_COMMON_QOS_SEND - input parameter gc is NULL \n"); #endif return; } if (cx==NULL){ #ifdef NAS_DEBUG_SEND printk("NAS_COMMON_QOS_SEND - input parameter cx is NULL \n"); #endif return; } // End debug information if (gc->rb==NULL) { gc->rb=nas_COMMON_search_rb(cx, gc->rab_id); if (gc->rb==NULL) { ++priv->stats.tx_dropped; printk("NAS_COMMON_QOS_SEND: No corresponding Radio Bearer, so message are dropped, rab_id=%u \n", gc->rab_id); return; } } #ifdef NAS_DEBUG_SEND printk("NAS_COMMON_QOS_SEND #1 :"); printk("lcr %u, rab_id %u, rab_id %u, skb_len %d\n", cx->lcr, (gc->rb)->rab_id, gc->rab_id,skb->len); nas_print_classifier(gc); #endif pdcph.data_size = skb->len; pdcph.rb_id = (gc->rb)->rab_id; pdcph.inst = inst; #ifdef NAS_NETLINK bytes_wrote = nas_netlink_send((char *)&pdcph,NAS_PDCPH_SIZE); #ifdef NAS_DEBUG_SEND printk("[NAS] Wrote %d bytes (header for %d byte skb) to PDCP via netlink\n", bytes_wrote,skb->len); #endif #else bytes_wrote = rtf_put(NAS2PDCP_FIFO, &pdcph, NAS_PDCPH_SIZE); #ifdef NAS_DEBUG_SEND printk("[NAS] Wrote %d bytes (header for %d byte skb) to PDCP fifo\n", bytes_wrote,skb->len); #endif #endif //NAS_NETLINK if (bytes_wrote != NAS_PDCPH_SIZE) { printk("NAS_COMMON_QOS_SEND: problem while writing PDCP's header (bytes wrote = %d )\n",bytes_wrote); printk("rb_id %d, Wrote %d, Header Size %lu\n", pdcph.rb_id , bytes_wrote, NAS_PDCPH_SIZE); #ifndef NAS_NETLINK rtf_reset(NAS2PDCP_FIFO); #endif //NAS_NETLINK return; } #ifdef NAS_NETLINK bytes_wrote += nas_netlink_send((char *)skb->data,skb->len); #else bytes_wrote += rtf_put(NAS2PDCP_FIFO, skb->data, skb->len); #endif //NAS_NETLINK if (bytes_wrote != skb->len+NAS_PDCPH_SIZE) { printk("NAS_COMMON_QOS_SEND: Inst %d, RB_ID %d: problem while writing PDCP's data, bytes_wrote = %d, Data_len %d, PDCPH_SIZE %lu\n", inst, pdcph.rb_id, bytes_wrote, skb->len, NAS_PDCPH_SIZE); // congestion #ifndef NAS_NETLINK rtf_reset(NAS2PDCP_FIFO); #endif //NAS_NETLINK return; } #ifdef NAS_DEBUG_SEND printk("NAS_SEND: Sending packet of size %d to PDCP \n",skb->len); for (j=0;jlen;j++) printk("%2x ",((unsigned char *)(skb->data))[j]); printk("\n"); #endif priv->stats.tx_bytes += skb->len; priv->stats.tx_packets ++; #ifdef NAS_DEBUG_SEND printk("NAS_COMMON_QOS_SEND - end \n"); #endif } #ifndef NAS_NETLINK //--------------------------------------------------------------------------- void nas_COMMON_QOS_receive(){ //--------------------------------------------------------------------------- uint8_t sapi; struct pdcp_data_ind_header_s pdcph; unsigned char data_buffer[2048]; struct classifier_entity *rclass; struct nas_priv *priv; int bytes_read; // Start debug information #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_QOS_RECEIVE - begin \n"); #endif // End debug information bytes_read = rtf_get(PDCP2NAS_FIFO,&pdcph, NAS_PDCPH_SIZE); while (bytes_read>0) { if (bytes_read != NAS_PDCPH_SIZE) { printk("NAS_COMMON_QOS_RECEIVE: problem while reading PDCP header\n"); return; } priv=netdev_priv(nasdev[pdcph.inst]); rclass = nas_COMMON_search_class_for_rb(pdcph.rb_id,priv); bytes_read+= rtf_get(PDCP2NAS_FIFO, data_buffer, pdcph.data_size); #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_QOS_RECEIVE - Got header for RB %d, Inst %d \n", pdcph.rb_id, pdcph.inst); #endif if (rclass) { #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON] Found corresponding connection in classifier for RAB\n"); #endif //NAS_DEBUG_RECEIVE nas_COMMON_receive(pdcph.data_size, (void *)data_buffer, pdcph.inst, rclass, pdcph.rb_id); } bytes_read = rtf_get(PDCP2NAS_FIFO, &pdcph, NAS_PDCPH_SIZE); } #ifdef NAS_DEBUG_RECEIVE printk("NAS_COMMON_QOS_RECEIVE - end \n"); #endif } #else void nas_COMMON_QOS_receive(struct nlmsghdr *nlh) { struct pdcp_data_ind_header_s *pdcph = (struct pdcp_data_ind_header_s *)NLMSG_DATA(nlh); struct classifier_entity *rclass; struct nas_priv *priv; priv = netdev_priv(nasdev[pdcph->inst]); #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON][NETLINK] QOS receive from PDCP, size %d, rab %d, inst %d\n", pdcph->data_size,pdcph->rb_id,pdcph->inst); #endif //NAS_DEBUG_RECEIVE rclass = nas_COMMON_search_class_for_rb(pdcph->rb_id,priv); if (rclass) { #ifdef NAS_DEBUG_RECEIVE printk("[NAS][COMMON][NETLINK] Found corresponding connection in classifier for RAB\n"); #endif //NAS_DEBUG_RECEIVE nas_COMMON_receive(pdcph->data_size, (unsigned char *)NLMSG_DATA(nlh) + NAS_PDCPH_SIZE, pdcph->inst, rclass, pdcph->rb_id); } } #endif //NAS_NETLINK //--------------------------------------------------------------------------- struct cx_entity *nas_COMMON_search_cx(nasLocalConnectionRef_t lcr,struct nas_priv *priv){ //--------------------------------------------------------------------------- #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_SEARCH_CX - lcr %d\n",lcr); #endif if (lcrcx+lcr; else return NULL; } //--------------------------------------------------------------------------- // Search a Radio Bearer struct rb_entity *nas_COMMON_search_rb(struct cx_entity *cx, nasRadioBearerId_t rab_id){ //--------------------------------------------------------------------------- struct rb_entity *rb; #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_SEARCH_RB - rab_id %d\n", rab_id); #endif for (rb=cx->rb; rb!=NULL; rb=rb->next) { #ifdef NAS_DEBUG_CLASS printk("SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS\n"); printk("NAS_COMMON_SEARCH_RB - rab_id %d Comparing rb_entity.rab_id %u \n", rb->rab_id); printk("NAS_COMMON_SEARCH_RB - rab_id %d Comparing rb_entity.sapi %u \n", rb->sapi; printk("NAS_COMMON_SEARCH_RB - rab_id %d Comparing rb_entity.qos %u \n", rb->qos; printk("NAS_COMMON_SEARCH_RB - rab_id %d Comparing rb_entity.state %u \n", rb->state; printk("NAS_COMMON_SEARCH_RB - rab_id %d Comparing rb_entity.retry %u \n", rb->retry; printk("NAS_COMMON_SEARCH_RB - rab_id %d Comparing rb_entity.countimer %u \n\n", rb->countimer;); #endif if (rb->rab_id==rab_id) return rb; } return NULL; } // // Search for a classifier with corresponding radio bearer struct classifier_entity *nas_COMMON_search_class_for_rb(nasRadioBearerId_t rab_id,struct nas_priv *priv) { struct rb_entity *rb; int dscp; struct classifier_entity *rclass; #ifdef NAS_DEBUG_CLASS printk("[NAS][COMMON] NAS_COMMON_SEARCH_CLASS_FOR_RB - rab_id %d\n", rab_id); #endif for (dscp=0;dscprclassifier[%d] = %p\n",dscp,priv->rclassifier[dscp]); for (rclass=priv->rclassifier[dscp]; rclass!=NULL; rclass=rclass->next) { #ifdef NAS_DEBUG_CLASS printk("[NAS][COMMON] NAS_COMMON_SEARCH_CLASS_FOR_RB - dscp %d, rb %d\n", dscp,rclass->rab_id); #endif if (rclass->rab_id==rab_id) return rclass; } } return NULL; } //--------------------------------------------------------------------------- struct rb_entity *nas_COMMON_add_rb(struct cx_entity *cx, nasRadioBearerId_t rab_id, nasQoSTrafficClass_t qos){ //-------------------------------------------------------------------------- struct rb_entity *rb; #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_ADD_RB - begin for rab_id %d , qos %d\n", rab_id, qos ); #endif if (cx==NULL){ #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_ADD_RB - input parameter cx is NULL \n"); #endif return NULL; } rb=nas_COMMON_search_rb(cx, rab_id); if (rb==NULL) { rb=(struct rb_entity *)kmalloc(sizeof(struct rb_entity), GFP_KERNEL); if (rb!=NULL) { rb->retry=0; rb->countimer=NAS_TIMER_IDLE; rb->rab_id=rab_id; // rb->rab_id=rab_id+(32*cx->lcr); #ifdef NAS_DEBUG_DC printk("NAS_COMMON_ADD_RB: rab_id=%u, mt_id=%u\n",rb->rab_id, cx->lcr); #endif rb->qos=qos; rb->sapi=NAS_RAB_INPUT_SAPI; rb->state=NAS_IDLE; rb->next=cx->rb; cx->rb=rb; ++cx->num_rb; } else printk("NAS_ADD_CTL_RB: no memory\n"); } #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_ADD_RB - end \n" ); #endif return rb; } //--------------------------------------------------------------------------- void nas_COMMON_flush_rb(struct cx_entity *cx){ //--------------------------------------------------------------------------- struct rb_entity *rb; struct classifier_entity *gc; uint8_t dscp; // End debug information #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_FLUSH_RB - begin\n"); #endif if (cx==NULL){ #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_FLUSH_RB - input parameter cx is NULL \n"); #endif return; } // End debug information for (rb=cx->rb; rb!=NULL; rb=cx->rb){ printk("NAS_COMMON_FLUSH_RB: del rab_id %u\n", rb->rab_id); cx->rb=rb->next; kfree(rb); } cx->num_rb=0; cx->rb=NULL; for(dscp=0; dscpsclassifier[dscp]; gc!=NULL; gc=gc->next) gc->rb=NULL; } #ifdef NAS_DEBUG_CLASS printk("NAS_COMMON_FLUSH_RB - end\n"); #endif }