#48 scan_sys_class_net bug

[Andy-1]

I found a bug in libpcap 1.1.1 pcap-linux.c scan_sys_class_net.

pcap_findalldevs was failing when I used bonding device under CentOS 5.4.

In /sys/class/net, I see these for bonding:

drwxr-xr-x 4 root root 0 Apr 27 16:12 bond0
-rw-r--r-- 1 root root 4096 Apr 27 16:11 bonding_masters

When scan_sys_class_net encounters the bonding_masters file, the ioctl below fails with
"no device".

This patch fixes it.

--- pcap-linux.c.org 2010-04-27 14:33:23.000000000 -0500
+++ pcap-linux.c 2010-04-27 14:33:52.000000000 -0500
@@ -1883,7 +1883,7 @@
*/
strncpy(ifrflags.ifr_name, name, sizeof(ifrflags.ifr_name));
if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifrflags) < 0) {
- if (errno == ENXIO)
+ if (errno == ENXIO || errno == ENODEV )
continue;
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
"SIOCGIFFLAGS: %.*s: %s",

[Andy-1]

patch for scan_sys_class_net

[Guy Harris]

Checked in and pushed to the main and 1.1 branches.

[Denis Ovsienko]

Administrators of the "libpcap" SourceForge project have superseded this tracker item (formerly artifact 2993250, now patch 48) with issue 244 of the "libpcap" GitHub project.