This is the mail archive of the mailing list for the glibc project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[RFC][PATCH] getifaddrs doesnt deal with Infiniband deviceaddresses

Hi All,

On attempting to run getifaddrs() on a system with IB interfaces, the
interface names for the IB interfaces(ipv6) were corrupt. The problem
lies with infiniband device addresses not being dealt with correctly.
The sockaddr_ll structure has an address field (sll_addr) which is of 8
bytes. However, infiniband devices have 20 byte hardware addresses. As a
result, when the address is memcpy'ed into the sll_addr field, the
interface name that follows this field is corrupted. Hence, I have
extended the sll_addr char array to accommodate IB addresses.
Could you  please share your thoughts on this?

Signed-off by : Vinay Sridhar <>

diff -Nuarp glibc-2.7.old/sysdeps/unix/sysv/linux/netpacket/packet.h
--- glibc-2.7.old/sysdeps/unix/sysv/linux/netpacket/packet.h	2001-07-06
00:56:18.000000000 -0400
+++ glibc-2.7/sysdeps/unix/sysv/linux/netpacket/packet.h	2008-06-02
00:11:36.000000000 -0400
@@ -28,7 +28,7 @@ struct sockaddr_ll
     unsigned short int sll_hatype;
     unsigned char sll_pkttype;
     unsigned char sll_halen;
-    unsigned char sll_addr[8];
+    unsigned char sll_addr[24];
 /* Packet types.  */

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]