File: eql_enslave.c

package info (click to toggle)
eql 1.2.ds1-4
  • links: PTS
  • area: main
  • in suites: jessie, jessie-kfreebsd, stretch
  • size: 184 kB
  • ctags: 10
  • sloc: ansic: 166; makefile: 6
file content (117 lines) | stat: -rw-r--r-- 2,327 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
/*
 * eql_enslave
 *
 * modeled from ifslave.c by Alan Cox (presumably?)
 *
 * (c) Copyright 1995 Simon Janes
 * NCM: Network and Communications Management, Inc.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/sockios.h>
#include <linux/if.h>
#ifndef list_head
struct list_head {
	struct list_head *next, *prev;
};
#endif
#include <linux/if_eql.h>

void check_running(char *device_name);

int s;

int
main(int argc, char **argv)
{
  struct ifreq ifr;
  slaving_request_t slaving_request;
  char master_name[16];
  int slave_mtu;
  int master_mtu;

  if (argc != 4)
    {
      fprintf (stderr, "usage: %s <master> <slave> <priority>\n", argv[0]);
      exit (1);
    }
  
  strcpy (master_name, argv[1]);
  strcpy (slaving_request.slave_name, argv[2]);
  slaving_request.priority = atol (argv[3]);

  s = socket (AF_INET, SOCK_DGRAM, 0);
  if ( s == -1)
    {
      perror ("socket");
      exit (1);
    }

  check_running (master_name);
  check_running (slaving_request.slave_name);

  strcpy (ifr.ifr_name, slaving_request.slave_name);
  if (ioctl (s, SIOCGIFMTU, &ifr) == -1)
    {
      perror("get MTU on slave failed");
      exit (1);
    }
  slave_mtu = ifr.ifr_mtu;

  strcpy (ifr.ifr_name, master_name);
  if (ioctl (s, SIOCGIFMTU, &ifr) == -1)
    {
      perror("get MTU on master failed");
      exit (1);
    }
  master_mtu = ifr.ifr_mtu;

  if ( master_mtu != slave_mtu )
    {
      fprintf (stderr, 
	       "master (%d) and slave (%d) MTU settings do not match\n",
	       master_mtu, slave_mtu);
      exit (1);
    }

  strcpy (ifr.ifr_name, master_name);
  ifr.ifr_data = (caddr_t) &slaving_request;
  
  if(ioctl (s,EQL_ENSLAVE, &ifr)==-1)
    {
      perror("EQL_ENSLAVE failed");
      exit (1);
    }

  return 0;
}

void
check_running(char *name)
{
  struct ifreq ifr;

  strcpy (ifr.ifr_name, name);
  if ( ioctl (s, SIOCGIFFLAGS, &ifr) == -1)
    {
      perror (name);
      exit (1);
    }
  if (ifr.ifr_flags & ((IFF_RUNNING | IFF_UP) != (IFF_RUNNING | IFF_UP)))
      {
	fprintf (stderr, "Device '%s' is not up or running.\n", name);
	exit (1);
      }
}

/*
 * Local Variables:
 * compile-command: "gcc -Wall -Wstrict-prototypes -o eql_enslave eql_enslave.c"
 * End:
 */