ghaddab
da8a799137
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5711 818b1a75-f10b-46b9-bf7c-635c3b92a50f
121 lines
3.9 KiB
C
121 lines
3.9 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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/*! \file netlink_init.c
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* \brief initiate the netlink socket for communication with nas dirver
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* \author Navid Nikaein and Raymomd Knopp
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* \date 2011
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* \version 1.0
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* \company Eurecom
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* \email: navid.nikaein@eurecom.fr
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*/
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#include <sys/socket.h>
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#include <linux/netlink.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "platform_constants.h"
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char nl_rx_buf[NL_MAX_PAYLOAD];
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struct sockaddr_nl nas_src_addr, nas_dest_addr;
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struct nlmsghdr *nas_nlh_tx = NULL;
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struct nlmsghdr *nas_nlh_rx = NULL;
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struct iovec nas_iov_tx;
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struct iovec nas_iov_rx = {nl_rx_buf, sizeof(nl_rx_buf)};
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int nas_sock_fd;
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struct msghdr nas_msg_tx;
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struct msghdr nas_msg_rx;
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#define GRAAL_NETLINK_ID 31
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int netlink_init(void)
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{
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int ret;
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nas_sock_fd = socket(PF_NETLINK, SOCK_RAW,GRAAL_NETLINK_ID);
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if (nas_sock_fd == -1) {
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printf("[NETLINK] Error opening socket %d (%d:%s)\n",nas_sock_fd,errno, strerror(errno));
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// exit(1);
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}
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printf("[NETLINK]Opened socket with fd %d\n",nas_sock_fd);
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#if !defined(ENABLE_PDCP_NETLINK_FIFO)
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ret = fcntl(nas_sock_fd,F_SETFL,O_NONBLOCK);
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if (ret == -1) {
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printf("[NETLINK] Error fcntl (%d:%s)\n",errno, strerror(errno));
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// exit(1);
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}
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#endif
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memset(&nas_src_addr, 0, sizeof(nas_src_addr));
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nas_src_addr.nl_family = AF_NETLINK;
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nas_src_addr.nl_pid = 1;//getpid(); /* self pid */
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nas_src_addr.nl_groups = 0; /* not in mcast groups */
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ret = bind(nas_sock_fd, (struct sockaddr*)&nas_src_addr, sizeof(nas_src_addr));
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memset(&nas_dest_addr, 0, sizeof(nas_dest_addr));
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nas_dest_addr.nl_family = AF_NETLINK;
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nas_dest_addr.nl_pid = 0; /* For Linux Kernel */
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nas_dest_addr.nl_groups = 0; /* unicast */
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// TX PART
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nas_nlh_tx=(struct nlmsghdr *)malloc(NLMSG_SPACE(NL_MAX_PAYLOAD));
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memset(nas_nlh_tx, 0, NLMSG_SPACE(NL_MAX_PAYLOAD));
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/* Fill the netlink message header */
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nas_nlh_tx->nlmsg_len = NLMSG_SPACE(NL_MAX_PAYLOAD);
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nas_nlh_tx->nlmsg_pid = 1;//getpid(); /* self pid */
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nas_nlh_tx->nlmsg_flags = 0;
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nas_iov_tx.iov_base = (void *)nas_nlh_tx;
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nas_iov_tx.iov_len = nas_nlh_tx->nlmsg_len;
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memset(&nas_msg_tx,0,sizeof(nas_msg_tx));
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nas_msg_tx.msg_name = (void *)&nas_dest_addr;
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nas_msg_tx.msg_namelen = sizeof(nas_dest_addr);
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nas_msg_tx.msg_iov = &nas_iov_tx;
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nas_msg_tx.msg_iovlen = 1;
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// RX PART
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memset(&nas_msg_rx,0,sizeof(nas_msg_rx));
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nas_msg_rx.msg_name = (void *)&nas_src_addr;
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nas_msg_rx.msg_namelen = sizeof(nas_src_addr);
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nas_msg_rx.msg_iov = &nas_iov_rx;
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nas_msg_rx.msg_iovlen = 1;
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return(nas_sock_fd);
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}
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