This example clears the session ID attribute value from recvattrs. Space is still allocated in the attribute structure, but the attribute values are NULL.
#include <tsix/t6attrs.h>
#include <tsol/label.h>
main()
{
t6attr_t recvattrs;
t6mask_t recvmask, clrmask;
recvmask = T6M_ALL_ATTRS; recvattrs = t6alloc_blk(recvmask);
clrmask = T6M_SESSION_ID;
t6clear_blk(clrmask, recvattrs);
}