/******************************************************************************* Eurecom OpenAirInterface Copyright(c) 1999 - 2011 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 pdcp_fifo.c * \brief pdcp interface with linux IP interface * \author Lionel GAUTHIER and Navid Nikaein * \date 2009 * \version 0.5 * \warning This component can be runned only in user-space * @ingroup pdcp */ #define PDCP_FIFO_C #include "pdcp.h" #ifdef USER_MODE #include #include #include #include #define rtf_put write #define rtf_get read #else #include #endif //USER_MODE #include "../MAC/extern.h" #include "SIMULATION/ETH_TRANSPORT/extern.h" #define PDCP_DEBUG 1 //#define IDROMEL_NEMO 1 #ifdef USER_MODE #include "UTIL/OCG/OCG.h" #include "UTIL/OCG/OCG_extern.h" #endif #ifdef NAS_NETLINK #include #include extern struct sockaddr_nl nas_src_addr, nas_dest_addr; extern struct nlmsghdr *nas_nlh; extern struct iovec nas_iov; extern int nas_sock_fd; extern struct msghdr nas_msg; #define MAX_PAYLOAD 1600 /* maximum payload size*/ unsigned char pdcp_read_state = 0; char pdcp_read_payload[MAX_PAYLOAD]; #endif pdcp_data_req_header_t pdcp_read_header; //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- int pdcp_fifo_flush_sdus () { //----------------------------------------------------------------------------- mem_block_t *sdu = list_get_head (&pdcp_sdu_list); int bytes_wrote = 0; int pdcp_nb_sdu_sent = 0; uint8_t cont = 1; int ret; while ((sdu) && (cont)) { #ifdef USER_MODE // asjust the instance id when passing sdu to IP ((pdcp_data_ind_header_t *)(sdu->data))->inst = (((pdcp_data_ind_header_t *)(sdu->data))->inst >= NB_eNB_INST) ? ((pdcp_data_ind_header_t *)(sdu->data))->inst - NB_eNB_INST +oai_emulation.info.nb_enb_local - oai_emulation.info.first_ue_local :// UE ((pdcp_data_ind_header_t *)(sdu->data))->inst - oai_emulation.info.first_ue_local; // ENB #else ((pdcp_data_ind_header_t *)(sdu->data))->inst = 0; #endif #ifdef PDCP_DEBUG msg("[PDCP][INFO] PDCP->IP TTI %d INST %d: Preparing %d Bytes of data from rab %d to Nas_mesh\n", Mac_rlc_xface->frame, ((pdcp_data_ind_header_t *)(sdu->data))->inst, ((pdcp_data_ind_header_t *)(sdu->data))->data_size, ((pdcp_data_ind_header_t *)(sdu->data))->rb_id); #endif //PDCP_DEBUG cont = 0; if (!pdcp_output_sdu_bytes_to_write) { if (!pdcp_output_header_bytes_to_write) { pdcp_output_header_bytes_to_write = sizeof (pdcp_data_ind_header_t); } #ifndef USER_MODE bytes_wrote = rtf_put (PDCP2NAS_FIFO, &(((uint8_t *) sdu->data)[sizeof (pdcp_data_ind_header_t) - pdcp_output_header_bytes_to_write]), pdcp_output_header_bytes_to_write); #else #ifdef NAS_NETLINK #ifdef LINUX memcpy(NLMSG_DATA(nas_nlh), &(((uint8_t *) sdu->data)[sizeof (pdcp_data_ind_header_t) - pdcp_output_header_bytes_to_write]), pdcp_output_header_bytes_to_write); nas_nlh->nlmsg_len = pdcp_output_header_bytes_to_write; #endif //LINUX #endif //NAS_NETLINK bytes_wrote = pdcp_output_header_bytes_to_write; #endif //USER_MODE #ifdef PDCP_DEBUG msg("[PDCP][INFO] TTI %d Sent %d Bytes of header to Nas_mesh\n", Mac_rlc_xface->frame, bytes_wrote); #endif //PDCP_DEBUG if (bytes_wrote > 0) { pdcp_output_header_bytes_to_write = pdcp_output_header_bytes_to_write - bytes_wrote; if (!pdcp_output_header_bytes_to_write) { // continue with sdu pdcp_output_sdu_bytes_to_write = ((pdcp_data_ind_header_t *) sdu->data)->data_size; #ifndef USER_MODE bytes_wrote = rtf_put (PDCP2NAS_FIFO, &(sdu->data[sizeof (pdcp_data_ind_header_t)]), pdcp_output_sdu_bytes_to_write); #else #ifdef NAS_NETLINK #ifdef LINUX memcpy(NLMSG_DATA(nas_nlh)+sizeof(pdcp_data_ind_header_t), &(sdu->data[sizeof (pdcp_data_ind_header_t)]), pdcp_output_sdu_bytes_to_write); nas_nlh->nlmsg_len += pdcp_output_sdu_bytes_to_write; ret = sendmsg(nas_sock_fd,&nas_msg,0); if (ret<0) { msg("[PDCP_FIFOS] sendmsg returns %d\n",ret); perror("error code:"); mac_xface->macphy_exit(""); break; } #endif // LINUX #endif //NAS_NETLINK bytes_wrote= pdcp_output_sdu_bytes_to_write; #endif // USER_MODE #ifdef PDCP_DEBUG msg("[PDCP][INFO] PDCP->IP TTI %d INST %d: Sent %d Bytes of data from rab %d to Nas_mesh\n", Mac_rlc_xface->frame, ((pdcp_data_ind_header_t *)(sdu->data))->inst, bytes_wrote, ((pdcp_data_ind_header_t *)(sdu->data))->rb_id); #endif //PDCP_DEBUG if (bytes_wrote > 0) { pdcp_output_sdu_bytes_to_write -= bytes_wrote; if (!pdcp_output_sdu_bytes_to_write) { // OK finish with this SDU // msg("rb sent a sdu qos_sap %d\n",sapiP); list_remove_head (&pdcp_sdu_list); free_mem_block (sdu); cont = 1; pdcp_nb_sdu_sent += 1; sdu = list_get_head (&pdcp_sdu_list); } } else { msg ("[PDCP] RADIO->IP SEND SDU CONGESTION!\n"); } } else { msg ("[PDCP] RADIO->IP SEND SDU CONGESTION!\n"); } } } else { // continue writing sdu #ifndef USER_MODE bytes_wrote = rtf_put (PDCP2NAS_FIFO, (uint8_t *) (&(sdu->data[sizeof (pdcp_data_ind_header_t) + ((pdcp_data_ind_header_t *) sdu->data)->data_size - pdcp_output_sdu_bytes_to_write])), pdcp_output_sdu_bytes_to_write); #else // USER_MODE bytes_wrote = pdcp_output_sdu_bytes_to_write; #endif // USER_MODE if (bytes_wrote > 0) { pdcp_output_sdu_bytes_to_write -= bytes_wrote; if (!pdcp_output_sdu_bytes_to_write) { // OK finish with this SDU //PRINT_RB_SEND_OUTPUT_SDU ("[PDCP] RADIO->IP SEND SDU\n"); list_remove_head (&pdcp_sdu_list); free_mem_block (sdu); cont = 1; pdcp_nb_sdu_sent += 1; sdu = list_get_head (&pdcp_sdu_list); // msg("rb sent a sdu from rab\n"); } } } } #ifndef USER_MODE if ((pdcp_nb_sdu_sent)) { if ((pdcp_2_nas_irq > 0)) { #ifdef PDCP_DEBUG msg("[PDCP][INFO] TTI %d : Trigger NAS RX interrupt\n", Mac_rlc_xface->frame); #endif //PDCP_DEBUG rt_pend_linux_srq (pdcp_2_nas_irq); } else { msg ("[PDCP] TTI %d: ERROR IF IP STACK WANTED : NOTIF PACKET(S) pdcp_2_nas_irq not initialized : %d\n", Mac_rlc_xface->frame, pdcp_2_nas_irq); } } #endif //USER_MODE return pdcp_nb_sdu_sent; } //----------------------------------------------------------------------------- /* * returns a positive value if whole bytes that had to be read were read * returns zero value if whole bytes that had to be read were not read at all * returns a negative value if an error was encountered while reading the rt fifo */ int pdcp_fifo_read_input_sdus_remaining_bytes () { //----------------------------------------------------------------------------- sdu_size_t bytes_read=0; if (pdcp_input_sdu_remaining_size_to_read > 0) { // printk("[PDCP][INFO] read_input_sdus pdcp_input_sdu_remaining_size_to_read = %d \n", pdcp_input_sdu_remaining_size_to_read); bytes_read = rtf_get (NAS2PDCP_FIFO, &(pdcp_input_sdu_buffer[pdcp_input_sdu_size_read]), pdcp_input_sdu_remaining_size_to_read); //printk("[PDCP][INFO] read fifo returned %d \n", bytes_read); if (bytes_read > 0) { //msg("[PDCP_FIFOS] Read %d remaining Bytes of data from Nas_mesh\n",bytes_read); pdcp_input_sdu_remaining_size_to_read = pdcp_input_sdu_remaining_size_to_read - bytes_read; pdcp_input_sdu_size_read = pdcp_input_sdu_size_read + bytes_read; if (pdcp_input_sdu_remaining_size_to_read != 0) { return 0; } else { #ifdef PDCP_DEBUG msg("[PDCP][INFO] TTI %d: IP->RADIO RECEIVED COMPLETE SDU size %d inst %d rb %d\n", Mac_rlc_xface->frame, pdcp_input_sdu_size_read, pdcp_input_header.inst, pdcp_input_header.rb_id); #endif //PDCP_DEBUG pdcp_input_sdu_size_read = 0; #ifdef IDROMEL_NEMO pdcp_read_header.inst = 0; #endif pdcp_data_req (pdcp_input_header.inst, pdcp_input_header.rb_id, pdcp_input_header.data_size, pdcp_input_sdu_buffer); // not necessary //memset(pdcp_input_sdu_buffer, 0, MAX_IP_PACKET_SIZE); return 1; } } else { return bytes_read; } } return 1; } #ifndef NAS_NETLINK //----------------------------------------------------------------------------- int pdcp_fifo_read_input_sdus () { //----------------------------------------------------------------------------- int cont; int bytes_read; // if remaining bytes to read if (pdcp_fifo_read_input_sdus_remaining_bytes () > 0) { // all bytes that had to be read for a SDU were read // if not overflow of list, try to get new sdus from rt fifo cont = 1; while (cont > 0) { bytes_read = rtf_get (NAS2PDCP_FIFO, &(((uint8_t *) & pdcp_input_header)[pdcp_input_index_header]), sizeof (pdcp_data_req_header_t) - pdcp_input_index_header); if (bytes_read > 0) { #ifdef PDCP_DEBUG msg("[PDCP_FIFOS] TTI %d Read %d Bytes of data (header %d) from Nas_mesh\n", Mac_rlc_xface->frame, bytes_read, sizeof(pdcp_data_req_header_t)); #endif pdcp_input_index_header += bytes_read; if (pdcp_input_index_header == sizeof (pdcp_data_req_header_t)) { #ifdef PDCP_DEBUG msg("[PDCP] TTI %d IP->RADIO READ HEADER sdu size %d\n", Mac_rlc_xface->frame, pdcp_input_header.data_size); #endif pdcp_input_index_header = 0; if (pdcp_input_header.data_size < 0) { msg("[PDCP][FATAL ERROR] READ_FIFO: DATA_SIZE %d < 0\n",pdcp_input_header.data_size); mac_xface->macphy_exit(""); return 0; } pdcp_input_sdu_remaining_size_to_read = pdcp_input_header.data_size; pdcp_input_sdu_size_read = 0; // we know the size of the sdu, so read the sdu; cont = pdcp_fifo_read_input_sdus_remaining_bytes (); } else { cont = 0; } // error while reading rt fifo } else { cont = 0; } } } return 0; } #else //NAS_NETLINK //----------------------------------------------------------------------------- int pdcp_fifo_read_input_sdus () { //----------------------------------------------------------------------------- int cont; int bytes_read; int len; if (pdcp_read_state == 0) { #ifdef LINUX len = recvmsg(nas_sock_fd, &nas_msg, 0); #else len = -1; #endif if (len<0) { //printf("[PDCP][NETLINK %d] nothing in pdcp NAS socket\n", nas_sock_fd); } else { #ifdef PDCP_DEBUG #ifdef LINUX printf("[PDCP][NETLINK] Received socket with length %d (nlmsg_len = %d)\n",len,nas_nlh->nlmsg_len-sizeof(struct nlmsghdr)); #endif PDCP_DEBUG #ifdef PDCP_DEBUG printf("[PDCP][NETLINK] nlmsg_len = %d (%d,%d)\n",nas_nlh->nlmsg_len, sizeof(pdcp_data_req_header_t), sizeof(struct nlmsghdr)); #endif LINUX #endif PDCP_DEBUG } #ifdef LINUX if (nas_nlh->nlmsg_len == sizeof (pdcp_data_req_header_t) + sizeof(struct nlmsghdr)) { pdcp_read_state = 1; //get memcpy((void *)&pdcp_read_header, (void *)NLMSG_DATA(nas_nlh), sizeof(pdcp_data_req_header_t)); } #else //LINUX pdcp_read_state = 1; #endif //LINUX } if (pdcp_read_state == 1) { #ifdef LINUX len = recvmsg(nas_sock_fd, &nas_msg, 0); #else len = -1; #endif //LINUX if (len<0) { // nothing in pdcp NAS socket } else { pdcp_read_state = 0; //print_active_requests() #ifdef LINUX memcpy(pdcp_read_payload, (unsigned char *)NLMSG_DATA(nas_nlh), nas_nlh->nlmsg_len - sizeof(struct nlmsghdr)); #endif #ifdef IDROMEL_NEMO pdcp_read_header.inst = 0; #endif pdcp_read_header.inst = (pdcp_read_header.inst >= oai_emulation.info.nb_enb_local) ? pdcp_read_header.inst - oai_emulation.info.nb_enb_local+ NB_eNB_INST + oai_emulation.info.first_ue_local : pdcp_read_header.inst + oai_emulation.info.first_enb_local; #ifdef PDCP_DEBUG printf("[PDCP][NETLINK][IP->PDCP] TTI %d, INST %d: Received socket with length %d (nlmsg_len = %d) on Rab %d \n", Mac_rlc_xface->frame, pdcp_read_header.inst, len, nas_nlh->nlmsg_len-sizeof(struct nlmsghdr), pdcp_read_header.rb_id); #endif PDCP_DEBUG pdcp_data_req(pdcp_read_header.inst, pdcp_read_header.rb_id, pdcp_read_header.data_size, pdcp_read_payload); } } } #endif