Initial revision

eql_enslave.c

@@ -0,0 +1,110 @@
+/*
+ * 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 <linux/sockios.h>
+#include <linux/if.h>
+
+#include "/usr/src/linux/drivers/net/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:
+ */