1 /******************************************************************************
2 S O C K E V _ C L I . C
3 Copyright (c) 2013, The Linux Foundation. All rights reserved.
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are
6 met:
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9 * Redistributions in binary form must reproduce the above
10 copyright notice, this list of conditions and the following
11 disclaimer in the documentation and/or other materials provided
12 with the distribution.
13 * Neither the name of The Linux Foundation nor the names of its
14 contributors may be used to endorse or promote products derived
15 from this software without specific prior written permission.
16 THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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25 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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27 ******************************************************************************/
28
29 /******************************************************************************
30 @file sockev_cli.c
31 @brief command line test utility to receive sockev netlink messages.
32 ******************************************************************************/
33
34 #include <sys/socket.h>
35 #include <linux/netlink.h>
36 #include <linux/sockev.h>
37 #include <stdlib.h>
38 #include <stdio.h>
39 #include <arpa/inet.h>
40 #include <unistd.h>
41 #include <string.h>
42
43 #define SOCKEVCLI_ERROR -1
44
main(void)45 int main(void)
46 {
47 int skfd, rc;
48 socklen_t addrlen;
49 struct sockaddr_nl my_addr, src_addr;
50 struct nlmsghdr *nlh = NULL;
51 struct sknlsockevmsg *msg;
52
53 nlh = (struct nlmsghdr *)
54 malloc(NLMSG_SPACE(sizeof(struct sknlsockevmsg) + 16));
55 if (!nlh) {
56 fprintf(stderr, "malloc() failed\n");
57 return SOCKEVCLI_ERROR;
58 }
59
60 skfd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCKEV);
61 if (skfd < 0) {
62 fprintf(stderr, "nl_open_sock: socket failed\n");
63 return SOCKEVCLI_ERROR;
64 }
65
66 memset(&my_addr, 0, sizeof(struct sockaddr_nl));
67
68 my_addr.nl_family = AF_NETLINK;
69 my_addr.nl_pid = getpid();
70 my_addr.nl_groups = SKNLGRP_SOCKEV;
71
72 rc = bind(skfd, (struct sockaddr *)&my_addr,
73 sizeof(struct sockaddr_nl));
74 if (rc < 0) {
75 fprintf(stderr, "nl_open_sock: bind failed\n");
76 close(skfd);
77 return SOCKEVCLI_ERROR;
78 }
79
80 while (1) {
81 recvfrom(skfd, nlh, sizeof(struct sknlsockevmsg) + 16, 0,
82 (struct sockaddr *)&src_addr, &addrlen);
83 msg = NLMSG_DATA(nlh);
84 printf("----------------------------\n");
85 printf("pid:\t%d\n", msg->pid);
86 printf("event:\t%s\n", msg->event);
87 printf("skfamily:\t0x%04X\n", msg->skfamily);
88 printf("skstate:\t%03d\n", msg->skstate);
89 printf("skprotocol:\t%03d\n", msg->skprotocol);
90 printf("sktype:\t0x%04X\n", msg->sktype);
91 printf("skflags:\t0x%016llX\n", msg->skflags);
92 }
93
94 return 0;
95 }
96
97