plz help me: Not able to access Linux header union variable...
harikumar.83 at gmail.com
Sat Nov 12 05:57:23 MST 2005
I am not able to access an union variables in the following header
file (linux/skbuff.h) .
given below are the details of the union variable
struct tcphdr *th;
struct udphdr *uh;
struct icmphdr *icmph;
struct igmphdr *igmph;
struct iphdr *ipiph;
struct spxhdr *spxh;
unsigned char *raw;
filename : linux /skbuff.h
structure name where the union is declared : struct sk_buff
I am not able to access the th/uh/icmph etc pointer objects from
the above union.
I am working with this module in the KERNEL SPACE.
Here, I have also given the code and output of that file..
src = skb->h.th->source;
src is declared as __u16 variable
when I build the above code, the following error comes. I tried all
options, but the gcc compiler does not allow me to access the source
variable in struct tcphdr. MY kernel version is 2.4.20-8.
sw_in.c: In function `handle_frame':
sw_in.c:20: dereferencing pointer to incomplete type
make: *** [sw_in.o] Error 1
It would be of great help to me, if you can give me some
information on this regard. Any information or thoughts are welcome on
More information about the PLUG