addding data to sk_buff
 

i used the function
skb_put(skb,len);
to append data . this fun will return a ptr to the next free location in the skbuff.

i have caught a packet at post_routing i need to append data to it. NOw i have the ptr to the free location in the caught sk_buff.

is there any function which can be used to copy the actual data bits into sk_buff

OR

do we just have to use that pointer to free location and
copy data to that location...................

hi,
check tcp layer in kernel. TCP layer also does same. it create new sk_buff and then uses skb_put to put data from application layer and tcp header. so go throu that code and do something similar to that.