150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include <sys/types.h>
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#include <fcntl.h>
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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 <unistd.h>
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typedef unsigned int sdu_size_t;
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typedef unsigned int rb_id_t;
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typedef struct pdcp_data_req_header_t {
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rb_id_t rb_id;
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sdu_size_t data_size;
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int inst;
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} pdcp_data_req_header_t;
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typedef struct pdcp_data_ind_header_t {
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rb_id_t rb_id;
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sdu_size_t data_size;
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int inst;
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} pdcp_data_ind_header_t;
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#define MAX_PAYLOAD 1024 /* maximum payload size*/
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struct sockaddr_nl src_addr, dest_addr;
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struct nlmsghdr *nlh = NULL;
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struct iovec iov;
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int sock_fd;
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struct msghdr msg;
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void foo( int sig )
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{
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printf("I got cntl-C, closing socket\n");
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close(sock_fd);
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exit(-1);
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}
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#define OAI_IP_DRIVER_NETLINK_ID 31
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void main()
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{
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struct sigaction newaction;
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int i=0;
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int ret;
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int len;
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newaction.sa_handler = foo;
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if ( sigaction( SIGINT, &newaction, NULL ) == -1)
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perror("Could not install the new signal handler");
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sock_fd = socket(PF_NETLINK, SOCK_RAW,OAI_IP_DRIVER_NETLINK_ID);
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printf("Opened socket with fd %d\n",sock_fd);
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ret = fcntl(sock_fd,F_SETFL,O_NONBLOCK);
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printf("fcntl returns %d\n",ret);
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memset(&src_addr, 0, sizeof(src_addr));
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src_addr.nl_family = AF_NETLINK;
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src_addr.nl_pid = 1;//getpid(); /* self pid */
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src_addr.nl_groups = 0; /* not in mcast groups */
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ret = bind(sock_fd, (struct sockaddr*)&src_addr,
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sizeof(src_addr));
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printf("bind returns %d\n",ret);
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memset(&dest_addr, 0, sizeof(dest_addr));
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dest_addr.nl_family = AF_NETLINK;
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dest_addr.nl_pid = 0; /* For Linux Kernel */
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dest_addr.nl_groups = 0; /* unicast */
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nlh=(struct nlmsghdr *)malloc(NLMSG_SPACE(MAX_PAYLOAD));
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/* Fill the netlink message header */
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nlh->nlmsg_len = NLMSG_SPACE(MAX_PAYLOAD);
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nlh->nlmsg_pid = 1;//getpid(); /* self pid */
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nlh->nlmsg_flags = 0;
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iov.iov_base = (void *)nlh;
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iov.iov_len = nlh->nlmsg_len;
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memset(&msg,0,sizeof(msg));
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msg.msg_name = (void *)&dest_addr;
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msg.msg_namelen = sizeof(dest_addr);
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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/* Read message from kernel */
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memset(nlh, 0, NLMSG_SPACE(MAX_PAYLOAD));
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while (1) {
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len = recvmsg(sock_fd, &msg, 0);
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if (len<0) {
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// exit(-1);
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} else {
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printf("Received socket with length %d (nlmsg_len = %d)\n",len,nlh->nlmsg_len);
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}
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usleep(1000);
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i=i+1;
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if ((i % 100) == 0)
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printf("%d\n",i);
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/*
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for (i=0;i<nlh->nlmsg_len - sizeof(struct nlmsghdr);i++) {
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printf("%x ",
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((unsigned char *)NLMSG_DATA(nlh))[i]);
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}
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*/
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}
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/* Close Netlink Socket */
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}
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