routine to get mac addr of nic

2 files changed, 63 insertions, 0 deletions

diff --git a/isys/getmacaddr.c b/isys/getmacaddr.c
new file mode 100644
index 000000000..6a419dc74
--- /dev/null
+++ b/isys/getmacaddr.c
@@ -0,0 +1,58 @@
+/*
+ * getmacaddr.c - get mac address for ethernet interface
+ *
+ * Copyright 2003 Red Hat, Inc.
+ *
+ * Michael Fulbright <msf@redhat.com>
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * general public license.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+
+/* returns NULL or allocated string */
+char *getMacAddr(char *ifname) {
+  int i;
+  int sock;
+  char *rcstr;
+  struct ifreq ifr;
+
+  if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) 
+      return NULL;
+ 
+  /* Setup our control structures. */
+  memset(&ifr, 0, sizeof(ifr));
+  strcpy(ifr.ifr_name, ifname);
+
+  if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0)
+      return NULL;
+
+  rcstr = (char *) malloc(24);
+  *rcstr = '\0';
+  for (i=0; i<6; i++) {
+      char tmp[4];
+      sprintf(tmp, "%02X",(unsigned char)ifr.ifr_hwaddr.sa_data[i]);
+      strcat(rcstr,tmp);
+      if (i != 5)
+	  strcat(rcstr, ":");
+  }
+
+  return rcstr;
+}
+
+#ifdef TESTING
+int main() {
+
+    printf("%s\n", getMacAddr("eth0"));
+}
+#endif
diff --git a/isys/getmacaddr.h b/isys/getmacaddr.h
new file mode 100644
index 000000000..96a483abd
--- /dev/null
+++ b/isys/getmacaddr.h
@@ -0,0 +1,5 @@
+#ifndef __GET_MAC_ADDR_H__
+#define __GET_MAC_ADDR_H__
+char *getMacAddr(char *ifname);
+#endif
+