f_t2
if (ctx->f_t2) {
smb_t2_done(ctx->f_t2);
ctx->f_t2 = NULL;
ctx->f_t2 = t2p;
ctx->f_t2 = t2p;
t2p = ctx->f_t2;
if (ctx->f_t2)
smb_t2_done(ctx->f_t2);