Add common index to ident conversion helper

diff --git a/plugins/inet.c b/plugins/inet.c
index e14d33e..ab0fcdc 100644 (file)
--- a/plugins/inet.c
+++ b/plugins/inet.c
@@ -26,10 +26,12 @@
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
+#include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <net/if.h>
+#include <net/ethernet.h>
 
 #include "inet.h"
 
@@ -57,3 +59,49 @@ char *inet_index2name(int index)
 
        return strdup(ifr.ifr_name);
 }
+
+char *inet_index2ident(int index, const char *prefix)
+{
+       struct ifreq ifr;
+       struct ether_addr *eth;
+       char *str;
+       int sk, err, len;
+
+       if (index < 0)
+               return NULL;
+
+       sk = socket(PF_INET, SOCK_DGRAM, 0);
+       if (sk < 0)
+               return NULL;
+
+       memset(&ifr, 0, sizeof(ifr));
+       ifr.ifr_ifindex = index;
+
+       err = ioctl(sk, SIOCGIFNAME, &ifr);
+
+       if (err == 0)
+               err = ioctl(sk, SIOCGIFHWADDR, &ifr);
+
+       close(sk);
+
+       if (err < 0)
+               return NULL;
+
+       len = prefix ? strlen(prefix) + 18 : 18;
+
+       str = malloc(len);
+       if (!str)
+               return NULL;
+
+       eth = (void *) &ifr.ifr_hwaddr.sa_data;
+       snprintf(str, len, "%s%02X_%02X_%02X_%02X_%02X_%02X",
+                                               prefix ? prefix : "",
+                                               eth->ether_addr_octet[0],
+                                               eth->ether_addr_octet[1],
+                                               eth->ether_addr_octet[2],
+                                               eth->ether_addr_octet[3],
+                                               eth->ether_addr_octet[4],
+                                               eth->ether_addr_octet[5]);
+
+       return str;
+}

diff --git a/plugins/inet.h b/plugins/inet.h
index aafd55b..afa8025 100644 (file)
--- a/plugins/inet.h
+++ b/plugins/inet.h
@@ -20,3 +20,4 @@
  */
 
 char *inet_index2name(int index);
+char *inet_index2ident(int index, const char *prefix);